// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/rhashtable.h>
#include <linux/bitops.h>
#include <linux/in6.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/socket.h>
#include <linux/route.h>
#include <linux/gcd.h>
#include <linux/if_macvlan.h>
#include <linux/refcount.h>
#include <linux/jhash.h>
#include <linux/net_namespace.h>
#include <linux/mutex.h>
#include <linux/genalloc.h>
#include <net/netevent.h>
#include <net/neighbour.h>
#include <net/arp.h>
#include <net/inet_dscp.h>
#include <net/ip_fib.h>
#include <net/ip6_fib.h>
#include <net/nexthop.h>
#include <net/fib_rules.h>
#include <net/ip_tunnels.h>
#include <net/l3mdev.h>
#include <net/addrconf.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/fib_notifier.h>
#include <net/switchdev.h>
#include "spectrum.h"
#include "core.h"
#include "reg.h"
#include "spectrum_cnt.h"
#include "spectrum_dpipe.h"
#include "spectrum_ipip.h"
#include "spectrum_mr.h"
#include "spectrum_mr_tcam.h"
#include "spectrum_router.h"
#include "spectrum_span.h"
struct mlxsw_sp_fib;
struct mlxsw_sp_vr;
struct mlxsw_sp_lpm_tree;
struct mlxsw_sp_rif_ops;
struct mlxsw_sp_rif {
struct list_head nexthop_list;
struct list_head neigh_list;
struct net_device *dev; /* NULL for underlay RIF */
struct mlxsw_sp_fid *fid;
unsigned char addr[ETH_ALEN];
int mtu;
u16 rif_index;
u8 mac_profile_id;
u8 rif_entries;
u16 vr_id;
const struct mlxsw_sp_rif_ops *ops;
struct mlxsw_sp *mlxsw_sp;
unsigned int counter_ingress;
bool counter_ingress_valid;
unsigned int counter_egress;
bool counter_egress_valid;
};
struct mlxsw_sp_rif_params {
struct net_device *dev;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
bool double_entry;
};
struct mlxsw_sp_rif_subport {
struct mlxsw_sp_rif common;
refcount_t ref_count;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
};
struct mlxsw_sp_rif_ipip_lb {
struct mlxsw_sp_rif common;
struct mlxsw_sp_rif_ipip_lb_config lb_config;
u16 ul_vr_id; /* Reserved for Spectrum-2. */
u16 ul_rif_id; /* Reserved for Spectrum. */
};
struct mlxsw_sp_rif_params_ipip_lb {
struct mlxsw_sp_rif_params common;
struct mlxsw_sp_rif_ipip_lb_config lb_config;
};
struct mlxsw_sp_rif_ops {
enum mlxsw_sp_rif_type type;
size_t rif_size;
void (*setup)(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params);
int (*configure)(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack);
void (*deconfigure)(struct mlxsw_sp_rif *rif);
struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack);
void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac);
};
struct mlxsw_sp_rif_mac_profile {
unsigned char mac_prefix[ETH_ALEN];
refcount_t ref_count;
u8 id;
};
struct mlxsw_sp_router_ops {
int (*init)(struct mlxsw_sp *mlxsw_sp);
int (*ipips_init)(struct mlxsw_sp *mlxsw_sp);
};
static struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev);
static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif);
static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree);
static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree);
static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib,
u8 tree_id);
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib);
static unsigned int *
mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return &rif->counter_egress;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return &rif->counter_ingress;
}
return NULL;
}
static bool
mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return rif->counter_egress_valid;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return rif->counter_ingress_valid;
}
return false;
}
static void
mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
bool valid)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
rif->counter_egress_valid = valid;
break;
case MLXSW_SP_RIF_COUNTER_INGRESS:
rif->counter_ingress_valid = valid;
break;
}
}
static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
unsigned int counter_index, bool enable,
enum mlxsw_sp_rif_counter_dir dir)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
bool is_egress = false;
int err;
if (dir == MLXSW_SP_RIF_COUNTER_EGRESS)
is_egress = true;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable,
is_egress);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir, u64 *cnt)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
unsigned int *p_counter_index;
bool valid;
int err;
valid = mlxsw_sp_rif_counter_valid_get(rif, dir);
if (!valid)
return -EINVAL;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index,
MLXSW_REG_RICNT_OPCODE_NOP);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
if (err)
return err;
*cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl);
return 0;
}
struct mlxsw_sp_rif_counter_set_basic {
u64 good_unicast_packets;
u64 good_multicast_packets;
u64 good_broadcast_packets;
u64 good_unicast_bytes;
u64 good_multicast_bytes;
u64 good_broadcast_bytes;
u64 error_packets;
u64 discard_packets;
u64 error_bytes;
u64 discard_bytes;
};
static int
mlxsw_sp_rif_counter_fetch_clear(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
struct mlxsw_sp_rif_counter_set_basic *set)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ricnt_pl[MLXSW_REG_RICNT_LEN];
unsigned int *p_counter_index;
int err;
if (!mlxsw_sp_rif_counter_valid_get(rif, dir))
return -EINVAL;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index,
MLXSW_REG_RICNT_OPCODE_CLEAR);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
if (err)
return err;
if (!set)
return 0;
#define MLXSW_SP_RIF_COUNTER_EXTRACT(NAME) \
(set->NAME = mlxsw_reg_ricnt_ ## NAME ## _get(ricnt_pl))
MLXSW_SP_RIF_COUNTER_EXTRACT(good_unicast_packets);
MLXSW_SP_RIF_COUNTER_EXTRACT(good_multicast_packets);
MLXSW_SP_RIF_COUNTER_EXTRACT(good_broadcast_packets);
MLXSW_SP_RIF_COUNTER_EXTRACT(good_unicast_bytes);
MLXSW_SP_RIF_COUNTER_EXTRACT(good_multicast_bytes);
MLXSW_SP_RIF_COUNTER_EXTRACT(good_broadcast_bytes);
MLXSW_SP_RIF_COUNTER_EXTRACT(error_packets);
MLXSW_SP_RIF_COUNTER_EXTRACT(discard_packets);
MLXSW_SP_RIF_COUNTER_EXTRACT(error_bytes);
MLXSW_SP_RIF_COUNTER_EXTRACT(discard_bytes);
#undef MLXSW_SP_RIF_COUNTER_EXTRACT
return 0;
}
static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
mlxsw_reg_ricnt_pack(ricnt_pl, counter_index,
MLXSW_REG_RICNT_OPCODE_CLEAR);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
}
int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
unsigned int *p_counter_index;
int err;
if (mlxsw_sp_rif_counter_valid_get(rif, dir))
return 0;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
p_counter_index);
if (err)
return err;
err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index);
if (err)
goto err_counter_clear;
err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, true, dir);
if (err)
goto err_counter_edit;
mlxsw_sp_rif_counter_valid_set(rif, dir, true);
return 0;
err_counter_edit:
err_counter_clear:
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
return err;
}
void mlxsw_sp_rif_counter_free(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
unsigned int *p_counter_index;
if (!mlxsw_sp_rif_counter_valid_get(rif, dir))
return;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (WARN_ON(!p_counter_index))
return;
mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, false, dir);
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
mlxsw_sp_rif_counter_valid_set(rif, dir, false);
}
static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct devlink *devlink;
devlink = priv_to_devlink(mlxsw_sp->core);
if (!devlink_dpipe_table_counter_enabled(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ERIF))
return;
mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif)
{
mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
#define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1)
struct mlxsw_sp_prefix_usage {
DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT);
};
#define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \
for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT)
static bool
mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static void
mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static void
mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
set_bit(prefix_len, prefix_usage->b);
}
static void
mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
clear_bit(prefix_len, prefix_usage->b);
}
struct mlxsw_sp_fib_key {
unsigned char addr[sizeof(struct in6_addr)];
unsigned char prefix_len;
};
enum mlxsw_sp_fib_entry_type {
MLXSW_SP_FIB_ENTRY_TYPE_REMOTE,
MLXSW_SP_FIB_ENTRY_TYPE_LOCAL,
MLXSW_SP_FIB_ENTRY_TYPE_TRAP,
MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE,
MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE,
/* This is a special case of local delivery, where a packet should be
* decapsulated on reception. Note that there is no corresponding ENCAP,
* because that's a type of next hop, not of FIB entry. (There can be
* several next hops in a REMOTE entry, and some of them may be
* encapsulating entries.)
*/
MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP,
MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP,
};
struct mlxsw_sp_nexthop_group_info;
struct mlxsw_sp_nexthop_group;
struct mlxsw_sp_fib_entry;
struct mlxsw_sp_fib_node {
struct mlxsw_sp_fib_entry *fib_entry;
struct list_head list;
struct rhash_head ht_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_fib_key key;
};
struct mlxsw_sp_fib_entry_decap {
struct mlxsw_sp_ipip_entry *ipip_entry;
u32 tunnel_index;
};
struct mlxsw_sp_fib_entry {
struct mlxsw_sp_fib_node *fib_node;
enum mlxsw_sp_fib_entry_type type;
struct list_head nexthop_group_node;
struct mlxsw_sp_nexthop_group *nh_group;
struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */
};
struct mlxsw_sp_fib4_entry {
struct mlxsw_sp_fib_entry common;
struct fib_info *fi;
u32 tb_id;
dscp_t dscp;
u8 type;
};
struct mlxsw_sp_fib6_entry {
struct mlxsw_sp_fib_entry common;
struct list_head rt6_list;
unsigned int nrt6;
};
struct mlxsw_sp_rt6 {
struct list_head list;
struct fib6_info *rt;
};
struct mlxsw_sp_lpm_tree {
u8 id; /* tree ID */
unsigned int ref_count;
enum mlxsw_sp_l3proto proto;
unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT];
struct mlxsw_sp_prefix_usage prefix_usage;
};
struct mlxsw_sp_fib {
struct rhashtable ht;
struct list_head node_list;
struct mlxsw_sp_vr *vr;
struct mlxsw_sp_lpm_tree *lpm_tree;
enum mlxsw_sp_l3proto proto;
};
struct mlxsw_sp_vr {
u16 id; /* virtual router ID */
u32 tb_id; /* kernel fib table id */
unsigned int rif_count;
struct mlxsw_sp_fib *fib4;
struct mlxsw_sp_fib *fib6;
struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX];
struct mlxsw_sp_rif *ul_rif;
refcount_t ul_rif_refcnt;
};
static const struct rhashtable_params mlxsw_sp_fib_ht_params;
static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
struct mlxsw_sp_fib *fib;
int err;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto];
fib = kzalloc(sizeof(*fib), GFP_KERNEL);
if (!fib)
return ERR_PTR(-ENOMEM);
err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params);
if (err)
goto err_rhashtable_init;
INIT_LIST_HEAD(&fib->node_list);
fib->proto = proto;
fib->vr = vr;
fib->lpm_tree = lpm_tree;
mlxsw_sp_lpm_tree_hold(lpm_tree);
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id);
if (err)
goto err_lpm_tree_bind;
return fib;
err_lpm_tree_bind:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
err_rhashtable_init:
kfree(fib);
return ERR_PTR(err);
}
static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib)
{
mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib);
mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree);
WARN_ON(!list_empty(&fib->node_list));
rhashtable_destroy(&fib->ht);
kfree(fib);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp)
{
static struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count == 0)
return lpm_tree;
}
return NULL;
}
static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, true,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, false,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static int
mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralst_pl[MLXSW_REG_RALST_LEN];
u8 root_bin = 0;
u8 prefix;
u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD;
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage)
root_bin = prefix;
mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id);
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) {
if (prefix == 0)
continue;
mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix,
MLXSW_REG_RALST_BIN_NO_CHILD);
last_prefix = prefix;
}
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp);
if (!lpm_tree)
return ERR_PTR(-EBUSY);
lpm_tree->proto = proto;
err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree);
if (err)
return ERR_PTR(err);
err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage,
lpm_tree);
if (err)
goto err_left_struct_set;
memcpy(&lpm_tree->prefix_usage, prefix_usage,
sizeof(lpm_tree->prefix_usage));
memset(&lpm_tree->prefix_ref_count, 0,
sizeof(lpm_tree->prefix_ref_count));
lpm_tree->ref_count = 1;
return lpm_tree;
err_left_struct_set:
mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
return ERR_PTR(err);
}
static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count != 0 &&
lpm_tree->proto == proto &&
mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage,
prefix_usage)) {
mlxsw_sp_lpm_tree_hold(lpm_tree);
return lpm_tree;
}
}
return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto);
}
static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree)
{
lpm_tree->ref_count++;
}
static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
if (--lpm_tree->ref_count == 0)
mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree);
}
#define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */
static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } };
struct mlxsw_sp_lpm_tree *lpm_tree;
u64 max_trees;
int err, i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES))
return -EIO;
max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES);
mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN;
mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count,
sizeof(struct mlxsw_sp_lpm_tree),
GFP_KERNEL);
if (!mlxsw_sp->router->lpm.trees)
return -ENOMEM;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN;
}
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(lpm_tree)) {
err = PTR_ERR(lpm_tree);
goto err_ipv4_tree_get;
}
mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree;
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(lpm_tree)) {
err = PTR_ERR(lpm_tree);
goto err_ipv6_tree_get;
}
mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree;
return 0;
err_ipv6_tree_get:
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
err_ipv4_tree_get:
kfree(mlxsw_sp->router->lpm.trees);
return err;
}
static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4];
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
kfree(mlxsw_sp->router->lpm.trees);
}
static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr)
{
return !!vr->fib4 || !!vr->fib6 ||
!!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] ||
!!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6];
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_is_used(vr))
return vr;
}
return NULL;
}
static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib, u8 tree_id)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto,
tree_id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
/* Bind to tree 0 which is default */
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static u32 mlxsw_sp_fix_tb_id(u32 tb_id)
{
/* For our purpose, squash main, default and local tables into one */
if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT)
tb_id = RT_TABLE_MAIN;
return tb_id;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp,
u32 tb_id)
{
struct mlxsw_sp_vr *vr;
int i;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id)
return vr;
}
return NULL;
}
int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
u16 *vr_id)
{
struct mlxsw_sp_vr *vr;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr) {
err = -ESRCH;
goto out;
}
*vr_id = vr->id;
out:
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
return vr->fib4;
case MLXSW_SP_L3_PROTO_IPV6:
return vr->fib6;
}
return NULL;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp,
u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_mr_table *mr4_table, *mr6_table;
struct mlxsw_sp_fib *fib4;
struct mlxsw_sp_fib *fib6;
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_find_unused(mlxsw_sp);
if (!vr) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers");
return ERR_PTR(-EBUSY);
}
fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(fib4))
return ERR_CAST(fib4);
fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(fib6)) {
err = PTR_ERR(fib6);
goto err_fib6_create;
}
mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(mr4_table)) {
err = PTR_ERR(mr4_table);
goto err_mr4_table_create;
}
mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(mr6_table)) {
err = PTR_ERR(mr6_table);
goto err_mr6_table_create;
}
vr->fib4 = fib4;
vr->fib6 = fib6;
vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table;
vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table;
vr->tb_id = tb_id;
return vr;
err_mr6_table_create:
mlxsw_sp_mr_table_destroy(mr4_table);
err_mr4_table_create:
mlxsw_sp_fib_destroy(mlxsw_sp, fib6);
err_fib6_create:
mlxsw_sp_fib_destroy(mlxsw_sp, fib4);
return ERR_PTR(err);
}
static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr)
{
mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]);
vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL;
mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]);
vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL;
mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6);
vr->fib6 = NULL;
mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4);
vr->fib4 = NULL;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_vr *vr;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack);
return vr;
}
static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr)
{
if (!vr->rif_count && list_empty(&vr->fib4->node_list) &&
list_empty(&vr->fib6->node_list) &&
mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) &&
mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]))
mlxsw_sp_vr_destroy(mlxsw_sp, vr);
}
static bool
mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto, u8 tree_id)
{
struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto);
if (!mlxsw_sp_vr_is_used(vr))
return false;
if (fib->lpm_tree->id == tree_id)
return true;
return false;
}
static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib,
struct mlxsw_sp_lpm_tree *new_tree)
{
struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree;
int err;
fib->lpm_tree = new_tree;
mlxsw_sp_lpm_tree_hold(new_tree);
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id);
if (err)
goto err_tree_bind;
mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree);
return 0;
err_tree_bind:
mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree);
fib->lpm_tree = old_tree;
return err;
}
static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib *fib,
struct mlxsw_sp_lpm_tree *new_tree)
{
enum mlxsw_sp_l3proto proto = fib->proto;
struct mlxsw_sp_lpm_tree *old_tree;
u8 old_id, new_id = new_tree->id;
struct mlxsw_sp_vr *vr;
int i, err;
old_tree = mlxsw_sp->router->lpm.proto_trees[proto];
old_id = old_tree->id;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id))
continue;
err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp,
mlxsw_sp_vr_fib(vr, proto),
new_tree);
if (err)
goto err_tree_replace;
}
memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count,
sizeof(new_tree->prefix_ref_count));
mlxsw_sp->router->lpm.proto_trees[proto] = new_tree;
mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree);
return 0;
err_tree_replace:
for (i--; i >= 0; i--) {
if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id))
continue;
mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp,
mlxsw_sp_vr_fib(vr, proto),
old_tree);
}
return err;
}
static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
u64 max_vrs;
int i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS))
return -EIO;
max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS);
mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr),
GFP_KERNEL);
if (!mlxsw_sp->router->vrs)
return -ENOMEM;
for (i = 0; i < max_vrs; i++) {
vr = &mlxsw_sp->router->vrs[i];
vr->id = i;
}
return 0;
}
static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp)
{
/* At this stage we're guaranteed not to have new incoming
* FIB notifications and the work queue is free from FIBs
* sitting on top of mlxsw netdevs. However, we can still
* have other FIBs queued. Flush the queue before flushing
* the device's tables. No need for locks, as we're the only
* writer.
*/
mlxsw_core_flush_owq();
mlxsw_sp_router_fib_flush(mlxsw_sp);
kfree(mlxsw_sp->router->vrs);
}
u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev)
{
struct net_device *d;
u32 tb_id;
rcu_read_lock();
d = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
if (d)
tb_id = l3mdev_fib_table(d) ? : RT_TABLE_MAIN;
else
tb_id = RT_TABLE_MAIN;
rcu_read_unlock();
return tb_id;
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif_params *params,
struct netlink_ext_ack *extack);
static struct mlxsw_sp_rif_ipip_lb *
mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_params_ipip_lb lb_params;
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_rif *rif;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt];
lb_params = (struct mlxsw_sp_rif_params_ipip_lb) {
.common.dev = ol_dev,
.common.lag = false,
.common.double_entry = ipip_ops->double_rif_entry,
.lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev),
};
rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack);
if (IS_ERR(rif))
return ERR_CAST(rif);
return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common);
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_ipip_entry *ret = NULL;
int err;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt];
ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL);
if (!ipip_entry)
return ERR_PTR(-ENOMEM);
ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt,
ol_dev, NULL);
if (IS_ERR(ipip_entry->ol_lb)) {
ret = ERR_CAST(ipip_entry->ol_lb);
goto err_ol_ipip_lb_create;
}
ipip_entry->ipipt = ipipt;
ipip_entry->ol_dev = ol_dev;
ipip_entry->parms = ipip_ops->parms_init(ol_dev);
err = ipip_ops->rem_ip_addr_set(mlxsw_sp, ipip_entry);
if (err) {
ret = ERR_PTR(err);
goto err_rem_ip_addr_set;
}
return ipip_entry;
err_rem_ip_addr_set:
mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common);
err_ol_ipip_lb_create:
kfree(ipip_entry);
return ret;
}
static void mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
const struct mlxsw_sp_ipip_ops *ipip_ops =
mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
ipip_ops->rem_ip_addr_unset(mlxsw_sp, ipip_entry);
mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common);
kfree(ipip_entry);
}
static bool
mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp,
const enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr saddr,
u32 ul_tb_id,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev);
enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt;
union mlxsw_sp_l3addr tun_saddr;
if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto)
return false;
tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev);
return tun_ul_tb_id == ul_tb_id &&
mlxsw_sp_l3addr_eq(&tun_saddr, &saddr);
}
static int mlxsw_sp_ipip_decap_parsing_depth_inc(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt];
/* Not all tunnels require to increase the default pasing depth
* (96 bytes).
*/
if (ipip_ops->inc_parsing_depth)
return mlxsw_sp_parsing_depth_inc(mlxsw_sp);
return 0;
}
static void mlxsw_sp_ipip_decap_parsing_depth_dec(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt)
{
const struct mlxsw_sp_ipip_ops *ipip_ops =
mlxsw_sp->router->ipip_ops_arr[ipipt];
if (ipip_ops->inc_parsing_depth)
mlxsw_sp_parsing_depth_dec(mlxsw_sp);
}
static int
mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 tunnel_index;
int err;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
1, &tunnel_index);
if (err)
return err;
err = mlxsw_sp_ipip_decap_parsing_depth_inc(mlxsw_sp,
ipip_entry->ipipt);
if (err)
goto err_parsing_depth_inc;
ipip_entry->decap_fib_entry = fib_entry;
fib_entry->decap.ipip_entry = ipip_entry;
fib_entry->decap.tunnel_index = tunnel_index;
return 0;
err_parsing_depth_inc:
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
fib_entry->decap.tunnel_index);
return err;
}
static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
enum mlxsw_sp_ipip_type ipipt = fib_entry->decap.ipip_entry->ipipt;
/* Unlink this node from the IPIP entry that it's the decap entry of. */
fib_entry->decap.ipip_entry->decap_fib_entry = NULL;
fib_entry->decap.ipip_entry = NULL;
mlxsw_sp_ipip_decap_parsing_depth_dec(mlxsw_sp, ipipt);
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
1, fib_entry->decap.tunnel_index);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len);
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry);
static void
mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry;
mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry);
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
}
static void
mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct mlxsw_sp_fib_entry *decap_fib_entry)
{
if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry,
ipip_entry))
return;
decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry))
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
}
static struct mlxsw_sp_fib_entry *
mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
enum mlxsw_sp_l3proto proto,
const union mlxsw_sp_l3addr *addr,
enum mlxsw_sp_fib_entry_type type)
{
struct mlxsw_sp_fib_node *fib_node;
unsigned char addr_prefix_len;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
const void *addrp;
size_t addr_len;
u32 addr4;
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
return NULL;
fib = mlxsw_sp_vr_fib(vr, proto);
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
addr4 = be32_to_cpu(addr->addr4);
addrp = &addr4;
addr_len = 4;
addr_prefix_len = 32;
break;
case MLXSW_SP_L3_PROTO_IPV6:
addrp = &addr->addr6;
addr_len = 16;
addr_prefix_len = 128;
break;
default:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len,
addr_prefix_len);
if (!fib_node || fib_node->fib_entry->type != type)
return NULL;
return fib_node->fib_entry;
}
/* Given an IPIP entry, find the corresponding decap route. */
static struct mlxsw_sp_fib_entry *
mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
static struct mlxsw_sp_fib_node *fib_node;
const struct mlxsw_sp_ipip_ops *ipip_ops;
unsigned char saddr_prefix_len;
union mlxsw_sp_l3addr saddr;
struct mlxsw_sp_fib *ul_fib;
struct mlxsw_sp_vr *ul_vr;
const void *saddrp;
size_t saddr_len;
u32 ul_tb_id;
u32 saddr4;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev);
ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id);
if (!ul_vr)
return NULL;
ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto);
saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto,
ipip_entry->ol_dev);
switch (ipip_ops->ul_proto) {
case MLXSW_SP_L3_PROTO_IPV4:
saddr4 = be32_to_cpu(saddr.addr4);
saddrp = &saddr4;
saddr_len = 4;
saddr_prefix_len = 32;
break;
case MLXSW_SP_L3_PROTO_IPV6:
saddrp = &saddr.addr6;
saddr_len = 16;
saddr_prefix_len = 128;
break;
default:
WARN_ON(1);
return NULL;
}
fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len,
saddr_prefix_len);
if (!fib_node ||
fib_node->fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP)
return NULL;
return fib_node->fib_entry;
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_ipip_type ipipt,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev);
if (IS_ERR(ipip_entry))
return ipip_entry;
list_add_tail(&ipip_entry->ipip_list_node,
&mlxsw_sp->router->ipip_list);
return ipip_entry;
}
static void
mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
list_del(&ipip_entry->ipip_list_node);
mlxsw_sp_ipip_entry_dealloc(mlxsw_sp, ipip_entry);
}
static bool
mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ul_dev,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr ul_dip,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN;
enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt;
if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto)
return false;
return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip,
ul_tb_id, ipip_entry);
}
/* Given decap parameters, find the corresponding IPIP entry. */
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, int ul_dev_ifindex,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr ul_dip)
{
struct mlxsw_sp_ipip_entry *ipip_entry = NULL;
struct net_device *ul_dev;
rcu_read_lock();
ul_dev = dev_get_by_index_rcu(mlxsw_sp_net(mlxsw_sp), ul_dev_ifindex);
if (!ul_dev)
goto out_unlock;
list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node)
if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev,
ul_proto, ul_dip,
ipip_entry))
goto out_unlock;
rcu_read_unlock();
return NULL;
out_unlock:
rcu_read_unlock();
return ipip_entry;
}
static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev,
enum mlxsw_sp_ipip_type *p_type)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
const struct mlxsw_sp_ipip_ops *ipip_ops;
enum mlxsw_sp_ipip_type ipipt;
for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) {
ipip_ops = router->ipip_ops_arr[ipipt];
if (dev->type == ipip_ops->dev_type) {
if (p_type)
*p_type = ipipt;
return true;
}
}
return false;
}
static bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL);
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node)
if (ipip_entry->ol_dev == ol_dev)
return ipip_entry;
return NULL;
}
static struct mlxsw_sp_ipip_entry *
mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *ul_dev,
struct mlxsw_sp_ipip_entry *start)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list,
ipip_list_node);
list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
struct net_device *ol_dev = ipip_entry->ol_dev;
struct net_device *ipip_ul_dev;
rcu_read_lock();
ipip_ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
rcu_read_unlock();
if (ipip_ul_dev == ul_dev)
return ipip_entry;
}
return NULL;
}
static bool mlxsw_sp_netdev_is_ipip_ul(struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL);
}
static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp,
const struct net_device *ol_dev,
enum mlxsw_sp_ipip_type ipipt)
{
const struct mlxsw_sp_ipip_ops *ops
= mlxsw_sp->router->ipip_ops_arr[ipipt];
return ops->can_offload(mlxsw_sp, ol_dev);
}
static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
enum mlxsw_sp_ipip_type ipipt = MLXSW_SP_IPIP_TYPE_MAX;
struct mlxsw_sp_ipip_entry *ipip_entry;
enum mlxsw_sp_l3proto ul_proto;
union mlxsw_sp_l3addr saddr;
u32 ul_tb_id;
mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt);
if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) {
ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev);
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev);
if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
NULL)) {
ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt,
ol_dev);
if (IS_ERR(ipip_entry))
return PTR_ERR(ipip_entry);
}
}
return 0;
}
static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry);
}
static void
mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct mlxsw_sp_fib_entry *decap_fib_entry;
decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry);
if (decap_fib_entry)
mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry,
decap_fib_entry);
}
static int
mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id,
u16 ul_rif_id, bool enable)
{
struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config;
enum mlxsw_reg_ritr_loopback_ipip_options ipip_options;
struct mlxsw_sp_rif *rif = &lb_rif->common;
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
struct in6_addr *saddr6;
u32 saddr4;
ipip_options = MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET;
switch (lb_cf.ul_protocol) {
case MLXSW_SP_L3_PROTO_IPV4:
saddr4 = be32_to_cpu(lb_cf.saddr.addr4);
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF,
rif->rif_index, rif->vr_id, rif->dev->mtu);
mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt,
ipip_options, ul_vr_id,
ul_rif_id, saddr4,
lb_cf.okey);
break;
case MLXSW_SP_L3_PROTO_IPV6:
saddr6 = &lb_cf.saddr.addr6;
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF,
rif->rif_index, rif->vr_id, rif->dev->mtu);
mlxsw_reg_ritr_loopback_ipip6_pack(ritr_pl, lb_cf.lb_ipipt,
ipip_options, ul_vr_id,
ul_rif_id, saddr6,
lb_cf.okey);
break;
}
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif_ipip_lb *lb_rif;
int err = 0;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry) {
lb_rif = ipip_entry->ol_lb;
err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id,
lb_rif->ul_rif_id, true);
if (err)
goto out;
lb_rif->common.mtu = ol_dev->mtu;
}
out:
return err;
}
static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry);
}
static void
mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
if (ipip_entry->decap_fib_entry)
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
}
static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (ipip_entry)
mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry);
}
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif);
static int
mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
bool keep_encap,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb;
struct mlxsw_sp_rif_ipip_lb *new_lb_rif;
new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp,
ipip_entry->ipipt,
ipip_entry->ol_dev,
extack);
if (IS_ERR(new_lb_rif))
return PTR_ERR(new_lb_rif);
ipip_entry->ol_lb = new_lb_rif;
if (keep_encap)
mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common,
&new_lb_rif->common);
mlxsw_sp_rif_destroy(&old_lb_rif->common);
return 0;
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif);
/**
* __mlxsw_sp_ipip_entry_update_tunnel - Update offload related to IPIP entry.
* @mlxsw_sp: mlxsw_sp.
* @ipip_entry: IPIP entry.
* @recreate_loopback: Recreates the associated loopback RIF.
* @keep_encap: Updates next hops that use the tunnel netdevice. This is only
* relevant when recreate_loopback is true.
* @update_nexthops: Updates next hops, keeping the current loopback RIF. This
* is only relevant when recreate_loopback is false.
* @extack: extack.
*
* Return: Non-zero value on failure.
*/
int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
bool recreate_loopback,
bool keep_encap,
bool update_nexthops,
struct netlink_ext_ack *extack)
{
int err;
/* RIFs can't be edited, so to update loopback, we need to destroy and
* recreate it. That creates a window of opportunity where RALUE and
* RATR registers end up referencing a RIF that's already gone. RATRs
* are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care
* of RALUE, demote the decap route back.
*/
if (ipip_entry->decap_fib_entry)
mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry);
if (recreate_loopback) {
err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry,
keep_encap, extack);
if (err)
return err;
} else if (update_nexthops) {
mlxsw_sp_nexthop_rif_update(mlxsw_sp,
&ipip_entry->ol_lb->common);
}
if (ipip_entry->ol_dev->flags & IFF_UP)
mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry);
return 0;
}
static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_ipip_entry *ipip_entry =
mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (!ipip_entry)
return 0;
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
true, false, false, extack);
}
static int
mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev,
bool *demote_this,
struct netlink_ext_ack *extack)
{
u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN;
enum mlxsw_sp_l3proto ul_proto;
union mlxsw_sp_l3addr saddr;
/* Moving underlay to a different VRF might cause local address
* conflict, and the conflicting tunnels need to be demoted.
*/
ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto;
saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev);
if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto,
saddr, ul_tb_id,
ipip_entry)) {
*demote_this = true;
return 0;
}
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
true, true, false, extack);
}
static int
mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev)
{
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
false, false, true, NULL);
}
static int
mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev)
{
/* A down underlay device causes encapsulated packets to not be
* forwarded, but decap still works. So refresh next hops without
* touching anything else.
*/
return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
false, false, true, NULL);
}
static int
mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
struct netlink_ext_ack *extack)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
int err;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev);
if (!ipip_entry)
/* A change might make a tunnel eligible for offloading, but
* that is currently not implemented. What falls to slow path
* stays there.
*/
return 0;
/* A change might make a tunnel not eligible for offloading. */
if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev,
ipip_entry->ipipt)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return 0;
}
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack);
return err;
}
void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
struct net_device *ol_dev = ipip_entry->ol_dev;
if (ol_dev->flags & IFF_UP)
mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry);
mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry);
}
/* The configuration where several tunnels have the same local address in the
* same underlay table needs special treatment in the HW. That is currently not
* implemented in the driver. This function finds and demotes the first tunnel
* with a given source address, except the one passed in the argument
* `except'.
*/
bool
mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_l3proto ul_proto,
union mlxsw_sp_l3addr saddr,
u32 ul_tb_id,
const struct mlxsw_sp_ipip_entry *except)
{
struct mlxsw_sp_ipip_entry *ipip_entry, *tmp;
list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
if (ipip_entry != except &&
mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr,
ul_tb_id, ipip_entry)) {
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
return true;
}
}
return false;
}
static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp,
struct net_device *ul_dev)
{
struct mlxsw_sp_ipip_entry *ipip_entry, *tmp;
list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list,
ipip_list_node) {
struct net_device *ol_dev = ipip_entry->ol_dev;
struct net_device *ipip_ul_dev;
rcu_read_lock();
ipip_ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
rcu_read_unlock();
if (ipip_ul_dev == ul_dev)
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
}
}
static int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ol_dev,
unsigned long event,
struct netdev_notifier_info *info)
{
struct netdev_notifier_changeupper_info *chup;
struct netlink_ext_ack *extack;
int err = 0;
switch (event) {
case NETDEV_REGISTER:
err = mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev);
break;
case NETDEV_UNREGISTER:
mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev);
break;
case NETDEV_UP:
mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev);
break;
case NETDEV_DOWN:
mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev);
break;
case NETDEV_CHANGEUPPER:
chup = container_of(info, typeof(*chup), info);
extack = info->extack;
if (netif_is_l3_master(chup->upper_dev))
err = mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp,
ol_dev,
extack);
break;
case NETDEV_CHANGE:
extack = info->extack;
err = mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp,
ol_dev, extack);
break;
case NETDEV_CHANGEMTU:
err = mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev);
break;
}
return err;
}
static int
__mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_ipip_entry *ipip_entry,
struct net_device *ul_dev,
bool *demote_this,
unsigned long event,
struct netdev_notifier_info *info)
{
struct netdev_notifier_changeupper_info *chup;
struct netlink_ext_ack *extack;
switch (event) {
case NETDEV_CHANGEUPPER:
chup = container_of(info, typeof(*chup), info);
extack = info->extack;
if (netif_is_l3_master(chup->upper_dev))
return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp,
ipip_entry,
ul_dev,
demote_this,
extack);
break;
case NETDEV_UP:
return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry,
ul_dev);
case NETDEV_DOWN:
return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp,
ipip_entry,
ul_dev);
}
return 0;
}
static int
mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *ul_dev,
unsigned long event,
struct netdev_notifier_info *info)
{
struct mlxsw_sp_ipip_entry *ipip_entry = NULL;
int err;
while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp,
ul_dev,
ipip_entry))) {
struct mlxsw_sp_ipip_entry *prev;
bool demote_this = false;
err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry,
ul_dev, &demote_this,
event, info);
if (err) {
mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp,
ul_dev);
return err;
}
if (demote_this) {
if (list_is_first(&ipip_entry->ipip_list_node,
&mlxsw_sp->router->ipip_list))
prev = NULL;
else
/* This can't be cached from previous iteration,
* because that entry could be gone now.
*/
prev = list_prev_entry(ipip_entry,
ipip_list_node);
mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
ipip_entry = prev;
}
}
return 0;
}
int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip,
u32 tunnel_index)
{
enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
struct mlxsw_sp_router *router = mlxsw_sp->router;
struct mlxsw_sp_fib_entry *fib_entry;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
if (WARN_ON_ONCE(router->nve_decap_config.valid)) {
err = -EINVAL;
goto out;
}
router->nve_decap_config.ul_tb_id = ul_tb_id;
router->nve_decap_config.tunnel_index = tunnel_index;
router->nve_decap_config.ul_proto = ul_proto;
router->nve_decap_config.ul_sip = *ul_sip;
router->nve_decap_config.valid = true;
/* It is valid to create a tunnel with a local IP and only later
* assign this IP address to a local interface
*/
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
goto out;
fib_entry->decap.tunnel_index = tunnel_index;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
goto err_fib_entry_update;
goto out;
err_fib_entry_update:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip)
{
enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
struct mlxsw_sp_router *router = mlxsw_sp->router;
struct mlxsw_sp_fib_entry *fib_entry;
mutex_lock(&mlxsw_sp->router->lock);
if (WARN_ON_ONCE(!router->nve_decap_config.valid))
goto out;
router->nve_decap_config.valid = false;
fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id,
ul_proto, ul_sip,
type);
if (!fib_entry)
goto out;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
}
static bool mlxsw_sp_router_nve_is_decap(struct mlxsw_sp *mlxsw_sp,
u32 ul_tb_id,
enum mlxsw_sp_l3proto ul_proto,
const union mlxsw_sp_l3addr *ul_sip)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
return router->nve_decap_config.valid &&
router->nve_decap_config.ul_tb_id == ul_tb_id &&
router->nve_decap_config.ul_proto == ul_proto &&
!memcmp(&router->nve_decap_config.ul_sip, ul_sip,
sizeof(*ul_sip));
}
struct mlxsw_sp_neigh_key {
struct neighbour *n;
};
struct mlxsw_sp_neigh_entry {
struct list_head rif_list_node;
struct rhash_head ht_node;
struct mlxsw_sp_neigh_key key;
u16 rif;
bool connected;
unsigned char ha[ETH_ALEN];
struct list_head nexthop_list; /* list of nexthops using
* this neigh entry
*/
struct list_head nexthop_neighs_list_node;
unsigned int counter_index;
bool counter_valid;
};
static const struct rhashtable_params mlxsw_sp_neigh_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_neigh_entry, key),
.head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_neigh_key),
};
struct mlxsw_sp_neigh_entry *
mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!neigh_entry) {
if (list_empty(&rif->neigh_list))
return NULL;
else
return list_first_entry(&rif->neigh_list,
typeof(*neigh_entry),
rif_list_node);
}
if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list))
return NULL;
return list_next_entry(neigh_entry, rif_list_node);
}
int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry)
{
return neigh_entry->key.n->tbl->family;
}
unsigned char *
mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry)
{
return neigh_entry->ha;
}
u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n;
n = neigh_entry->key.n;
return ntohl(*((__be32 *) n->primary_key));
}
struct in6_addr *
mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n;
n = neigh_entry->key.n;
return (struct in6_addr *) &n->primary_key;
}
int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
u64 *p_counter)
{
if (!neigh_entry->counter_valid)
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index,
p_counter, NULL);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n,
u16 rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL);
if (!neigh_entry)
return NULL;
neigh_entry->key.n = n;
neigh_entry->rif = rif;
INIT_LIST_HEAD(&neigh_entry->nexthop_list);
return neigh_entry;
}
static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry)
{
kfree(neigh_entry);
}
static int
mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static bool
mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct devlink *devlink;
const char *table_name;
switch (mlxsw_sp_neigh_entry_type(neigh_entry)) {
case AF_INET:
table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4;
break;
case AF_INET6:
table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6;
break;
default:
WARN_ON(1);
return false;
}
devlink = priv_to_devlink(mlxsw_sp->core);
return devlink_dpipe_table_counter_enabled(devlink, table_name);
}
static void
mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry))
return;
if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index))
return;
neigh_entry->counter_valid = true;
}
static void
mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
if (!neigh_entry->counter_valid)
return;
mlxsw_sp_flow_counter_free(mlxsw_sp,
neigh_entry->counter_index);
neigh_entry->counter_valid = false;
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_rif *rif;
int err;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev);
if (!rif)
return ERR_PTR(-EINVAL);
neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index);
if (!neigh_entry)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry);
atomic_inc(&mlxsw_sp->router->neighs_update.neigh_count);
list_add(&neigh_entry->rif_list_node, &rif->neigh_list);
return neigh_entry;
err_neigh_entry_insert:
mlxsw_sp_neigh_entry_free(neigh_entry);
return ERR_PTR(err);
}
static void
mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
list_del(&neigh_entry->rif_list_node);
atomic_dec(&mlxsw_sp->router->neighs_update.neigh_count);
mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_free(neigh_entry);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_key key;
key.n = n;
return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht,
&key, mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval;
#if IS_ENABLED(CONFIG_IPV6)
interval = min_t(unsigned long,
NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME),
NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME));
#else
interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME);
#endif
mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval);
}
static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int ent_index)
{
u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
struct net_device *dev;
struct neighbour *n;
__be32 dipn;
u32 dip;
u16 rif;
mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip);
if (WARN_ON_ONCE(rif >= max_rifs))
return;
if (!mlxsw_sp->router->rifs[rif]) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n");
return;
}
dipn = htonl(dip);
dev = mlxsw_sp->router->rifs[rif]->dev;
n = neigh_lookup(&arp_tbl, &dipn, dev);
if (!n)
return;
netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip);
neigh_event_send(n, NULL);
neigh_release(n);
}
#if IS_ENABLED(CONFIG_IPV6)
static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
struct net_device *dev;
struct neighbour *n;
struct in6_addr dip;
u16 rif;
mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif,
(char *) &dip);
if (!mlxsw_sp->router->rifs[rif]) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n");
return;
}
dev = mlxsw_sp->router->rifs[rif]->dev;
n = neigh_lookup(&nd_tbl, &dip, dev);
if (!n)
return;
netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip);
neigh_event_send(n, NULL);
neigh_release(n);
}
#else
static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
}
#endif
static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
u8 num_entries;
int i;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
rec_index);
/* Hardware starts counting at 0, so add 1. */
num_entries++;
/* Each record consists of several neighbour entries. */
for (i = 0; i < num_entries; i++) {
int ent_index;
ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i;
mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl,
ent_index);
}
}
static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
/* One record contains one entry. */
mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl,
rec_index);
}
static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl, int rec_index)
{
switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) {
case MLXSW_REG_RAUHTD_TYPE_IPV4:
mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl,
rec_index);
break;
case MLXSW_REG_RAUHTD_TYPE_IPV6:
mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl,
rec_index);
break;
}
}
static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl)
{
u8 num_rec, last_rec_index, num_entries;
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
last_rec_index = num_rec - 1;
if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM)
return false;
if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) ==
MLXSW_REG_RAUHTD_TYPE_IPV6)
return true;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
last_rec_index);
if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC)
return true;
return false;
}
static int
__mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
enum mlxsw_reg_rauhtd_type type)
{
int i, num_rec;
int err;
/* Ensure the RIF we read from the device does not change mid-dump. */
mutex_lock(&mlxsw_sp->router->lock);
do {
mlxsw_reg_rauhtd_pack(rauhtd_pl, type);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd),
rauhtd_pl);
if (err) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n");
break;
}
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
for (i = 0; i < num_rec; i++)
mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl,
i);
} while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl));
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp)
{
enum mlxsw_reg_rauhtd_type type;
char *rauhtd_pl;
int err;
if (!atomic_read(&mlxsw_sp->router->neighs_update.neigh_count))
return 0;
rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL);
if (!rauhtd_pl)
return -ENOMEM;
type = MLXSW_REG_RAUHTD_TYPE_IPV4;
err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type);
if (err)
goto out;
type = MLXSW_REG_RAUHTD_TYPE_IPV6;
err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type);
out:
kfree(rauhtd_pl);
return err;
}
static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
mutex_lock(&mlxsw_sp->router->lock);
list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list,
nexthop_neighs_list_node)
/* If this neigh have nexthops, make the kernel think this neigh
* is active regardless of the traffic.
*/
neigh_event_send(neigh_entry->key.n, NULL);
mutex_unlock(&mlxsw_sp->router->lock);
}
static void
mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval = mlxsw_sp->router->neighs_update.interval;
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw,
msecs_to_jiffies(interval));
}
static void mlxsw_sp_router_neighs_update_work(struct work_struct *work)
{
struct mlxsw_sp_router *router;
int err;
router = container_of(work, struct mlxsw_sp_router,
neighs_update.dw.work);
err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp);
if (err)
dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity");
mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp);
mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp);
}
static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_router *router;
router = container_of(work, struct mlxsw_sp_router,
nexthop_probe_dw.work);
/* Iterate over nexthop neighbours, find those who are unresolved and
* send arp on them. This solves the chicken-egg problem when
* the nexthop wouldn't get offloaded until the neighbor is resolved
* but it wouldn't get resolved ever in case traffic is flowing in HW
* using different nexthop.
*/
mutex_lock(&router->lock);
list_for_each_entry(neigh_entry, &router->nexthop_neighs_list,
nexthop_neighs_list_node)
if (!neigh_entry->connected)
neigh_event_send(neigh_entry->key.n, NULL);
mutex_unlock(&router->lock);
mlxsw_core_schedule_dw(&router->nexthop_probe_dw,
MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL);
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing, bool dead);
static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding)
{
return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD :
MLXSW_REG_RAUHT_OP_WRITE_DELETE;
}
static int
mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
enum mlxsw_reg_rauht_op op)
{
struct neighbour *n = neigh_entry->key.n;
u32 dip = ntohl(*((__be32 *) n->primary_key));
char rauht_pl[MLXSW_REG_RAUHT_LEN];
mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha,
dip);
if (neigh_entry->counter_valid)
mlxsw_reg_rauht_pack_counter(rauht_pl,
neigh_entry->counter_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
static int
mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
enum mlxsw_reg_rauht_op op)
{
struct neighbour *n = neigh_entry->key.n;
char rauht_pl[MLXSW_REG_RAUHT_LEN];
const char *dip = n->primary_key;
mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha,
dip);
if (neigh_entry->counter_valid)
mlxsw_reg_rauht_pack_counter(rauht_pl,
neigh_entry->counter_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n = neigh_entry->key.n;
/* Packets with a link-local destination address are trapped
* after LPM lookup and never reach the neighbour table, so
* there is no need to program such neighbours to the device.
*/
if (ipv6_addr_type((struct in6_addr *) &n->primary_key) &
IPV6_ADDR_LINKLOCAL)
return true;
return false;
}
static void
mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool adding)
{
enum mlxsw_reg_rauht_op op = mlxsw_sp_rauht_op(adding);
int err;
if (!adding && !neigh_entry->connected)
return;
neigh_entry->connected = adding;
if (neigh_entry->key.n->tbl->family == AF_INET) {
err = mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry,
op);
if (err)
return;
} else if (neigh_entry->key.n->tbl->family == AF_INET6) {
if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry))
return;
err = mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry,
op);
if (err)
return;
} else {
WARN_ON_ONCE(1);
return;
}
if (adding)
neigh_entry->key.n->flags |= NTF_OFFLOADED;
else
neigh_entry->key.n->flags &= ~NTF_OFFLOADED;
}
void
mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool adding)
{
if (adding)
mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry);
else
mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true);
}
struct mlxsw_sp_netevent_work {
struct work_struct work;
struct mlxsw_sp *mlxsw_sp;
struct neighbour *n;
};
static void mlxsw_sp_router_neigh_event_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
struct mlxsw_sp_neigh_entry *neigh_entry;
struct neighbour *n = net_work->n;
unsigned char ha[ETH_ALEN];
bool entry_connected;
u8 nud_state, dead;
/* If these parameters are changed after we release the lock,
* then we are guaranteed to receive another event letting us
* know about it.
*/
read_lock_bh(&n->lock);
memcpy(ha, n->ha, ETH_ALEN);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
mutex_lock(&mlxsw_sp->router->lock);
mlxsw_sp_span_respin(mlxsw_sp);
entry_connected = nud_state & NUD_VALID && !dead;
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!entry_connected && !neigh_entry)
goto out;
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry))
goto out;
}
if (neigh_entry->connected && entry_connected &&
!memcmp(neigh_entry->ha, ha, ETH_ALEN))
goto out;
memcpy(neigh_entry->ha, ha, ETH_ALEN);
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected);
mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected,
dead);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
out:
mutex_unlock(&mlxsw_sp->router->lock);
neigh_release(n);
kfree(net_work);
}
static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
mlxsw_sp_mp_hash_init(mlxsw_sp);
kfree(net_work);
}
static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_router_update_priority_work(struct work_struct *work)
{
struct mlxsw_sp_netevent_work *net_work =
container_of(work, struct mlxsw_sp_netevent_work, work);
struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp;
__mlxsw_sp_router_init(mlxsw_sp);
kfree(net_work);
}
static int mlxsw_sp_router_schedule_work(struct net *net,
struct notifier_block *nb,
void (*cb)(struct work_struct *))
{
struct mlxsw_sp_netevent_work *net_work;
struct mlxsw_sp_router *router;
router = container_of(nb, struct mlxsw_sp_router, netevent_nb);
if (!net_eq(net, mlxsw_sp_net(router->mlxsw_sp)))
return NOTIFY_DONE;
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work)
return NOTIFY_BAD;
INIT_WORK(&net_work->work, cb);
net_work->mlxsw_sp = router->mlxsw_sp;
mlxsw_core_schedule_work(&net_work->work);
return NOTIFY_DONE;
}
static int mlxsw_sp_router_netevent_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct mlxsw_sp_netevent_work *net_work;
struct mlxsw_sp_port *mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp;
unsigned long interval;
struct neigh_parms *p;
struct neighbour *n;
switch (event) {
case NETEVENT_DELAY_PROBE_TIME_UPDATE:
p = ptr;
/* We don't care about changes in the default table. */
if (!p->dev || (p->tbl->family != AF_INET &&
p->tbl->family != AF_INET6))
return NOTIFY_DONE;
/* We are in atomic context and can't take RTNL mutex,
* so use RCU variant to walk the device chain.
*/
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME));
mlxsw_sp->router->neighs_update.interval = interval;
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
case NETEVENT_NEIGH_UPDATE:
n = ptr;
if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6)
return NOTIFY_DONE;
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
if (!net_work) {
mlxsw_sp_port_dev_put(mlxsw_sp_port);
return NOTIFY_BAD;
}
INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work);
net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
net_work->n = n;
/* Take a reference to ensure the neighbour won't be
* destructed until we drop the reference in delayed
* work.
*/
neigh_clone(n);
mlxsw_core_schedule_work(&net_work->work);
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
case NETEVENT_IPV4_MPATH_HASH_UPDATE:
case NETEVENT_IPV6_MPATH_HASH_UPDATE:
return mlxsw_sp_router_schedule_work(ptr, nb,
mlxsw_sp_router_mp_hash_event_work);
case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE:
return mlxsw_sp_router_schedule_work(ptr, nb,
mlxsw_sp_router_update_priority_work);
}
return NOTIFY_DONE;
}
static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp)
{
int err;
err = rhashtable_init(&mlxsw_sp->router->neigh_ht,
&mlxsw_sp_neigh_ht_params);
if (err)
return err;
/* Initialize the polling interval according to the default
* table.
*/
mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp);
/* Create the delayed works for the activity_update */
INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw,
mlxsw_sp_router_neighs_update_work);
INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw,
mlxsw_sp_router_probe_unresolved_nexthops);
atomic_set(&mlxsw_sp->router->neighs_update.neigh_count, 0);
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0);
mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0);
return 0;
}
static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp)
{
cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw);
cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw);
rhashtable_destroy(&mlxsw_sp->router->neigh_ht);
}
static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry, *tmp;
list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list,
rif_list_node) {
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false);
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
}
}
enum mlxsw_sp_nexthop_type {
MLXSW_SP_NEXTHOP_TYPE_ETH,
MLXSW_SP_NEXTHOP_TYPE_IPIP,
};
enum mlxsw_sp_nexthop_action {
/* Nexthop forwards packets to an egress RIF */
MLXSW_SP_NEXTHOP_ACTION_FORWARD,
/* Nexthop discards packets */
MLXSW_SP_NEXTHOP_ACTION_DISCARD,
/* Nexthop traps packets */
MLXSW_SP_NEXTHOP_ACTION_TRAP,
};
struct mlxsw_sp_nexthop_key {
struct fib_nh *fib_nh;
};
struct mlxsw_sp_nexthop {
struct list_head neigh_list_node; /* member of neigh entry list */
struct list_head rif_list_node;
struct list_head router_list_node;
struct mlxsw_sp_nexthop_group_info *nhgi; /* pointer back to the group
* this nexthop belongs to
*/
struct rhash_head ht_node;
struct neigh_table *neigh_tbl;
struct mlxsw_sp_nexthop_key key;
unsigned char gw_addr[sizeof(struct in6_addr)];
int ifindex;
int nh_weight;
int norm_nh_weight;
int num_adj_entries;
struct mlxsw_sp_rif *rif;
u8 should_offload:1, /* set indicates this nexthop should be written
* to the adjacency table.
*/
offloaded:1, /* set indicates this nexthop was written to the
* adjacency table.
*/
update:1; /* set indicates this nexthop should be updated in the
* adjacency table (f.e., its MAC changed).
*/
enum mlxsw_sp_nexthop_action action;
enum mlxsw_sp_nexthop_type type;
union {
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_ipip_entry *ipip_entry;
};
unsigned int counter_index;
bool counter_valid;
};
enum mlxsw_sp_nexthop_group_type {
MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4,
MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6,
MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ,
};
struct mlxsw_sp_nexthop_group_info {
struct mlxsw_sp_nexthop_group *nh_grp;
u32 adj_index;
u16 ecmp_size;
u16 count;
int sum_norm_weight;
u8 adj_index_valid:1,
gateway:1, /* routes using the group use a gateway */
is_resilient:1;
struct list_head list; /* member in nh_res_grp_list */
struct mlxsw_sp_nexthop nexthops[];
#define nh_rif nexthops[0].rif
};
struct mlxsw_sp_nexthop_group_vr_key {
u16 vr_id;
enum mlxsw_sp_l3proto proto;
};
struct mlxsw_sp_nexthop_group_vr_entry {
struct list_head list; /* member in vr_list */
struct rhash_head ht_node; /* member in vr_ht */
refcount_t ref_count;
struct mlxsw_sp_nexthop_group_vr_key key;
};
struct mlxsw_sp_nexthop_group {
struct rhash_head ht_node;
struct list_head fib_list; /* list of fib entries that use this group */
union {
struct {
struct fib_info *fi;
} ipv4;
struct {
u32 id;
} obj;
};
struct mlxsw_sp_nexthop_group_info *nhgi;
struct list_head vr_list;
struct rhashtable vr_ht;
enum mlxsw_sp_nexthop_group_type type;
bool can_destroy;
};
void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct devlink *devlink;
devlink = priv_to_devlink(mlxsw_sp->core);
if (!devlink_dpipe_table_counter_enabled(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ADJ))
return;
if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index))
return;
nh->counter_valid = true;
}
void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
if (!nh->counter_valid)
return;
mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index);
nh->counter_valid = false;
}
int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh, u64 *p_counter)
{
if (!nh->counter_valid)
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index,
p_counter, NULL);
}
struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router,
struct mlxsw_sp_nexthop *nh)
{
if (!nh) {
if (list_empty(&router->nexthop_list))
return NULL;
else
return list_first_entry(&router->nexthop_list,
typeof(*nh), router_list_node);
}
if (list_is_last(&nh->router_list_node, &router->nexthop_list))
return NULL;
return list_next_entry(nh, router_list_node);
}
bool mlxsw_sp_nexthop_is_forward(const struct mlxsw_sp_nexthop *nh)
{
return nh->offloaded && nh->action == MLXSW_SP_NEXTHOP_ACTION_FORWARD;
}
unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh)
{
if (nh->type != MLXSW_SP_NEXTHOP_TYPE_ETH ||
!mlxsw_sp_nexthop_is_forward(nh))
return NULL;
return nh->neigh_entry->ha;
}
int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
u32 *p_adj_size, u32 *p_adj_hash_index)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh->nhgi;
u32 adj_hash_index = 0;
int i;
if (!nh->offloaded || !nhgi->adj_index_valid)
return -EINVAL;
*p_adj_index = nhgi->adj_index;
*p_adj_size = nhgi->ecmp_size;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nhgi->nexthops[i];
if (nh_iter == nh)
break;
if (nh_iter->offloaded)
adj_hash_index += nh_iter->num_adj_entries;
}
*p_adj_hash_index = adj_hash_index;
return 0;
}
struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh)
{
return nh->rif;
}
bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh->nhgi;
int i;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nhgi->nexthops[i];
if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP)
return true;
}
return false;
}
static const struct rhashtable_params mlxsw_sp_nexthop_group_vr_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_group_vr_key),
.automatic_shrinking = true,
};
static struct mlxsw_sp_nexthop_group_vr_entry *
mlxsw_sp_nexthop_group_vr_entry_lookup(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_key key;
memset(&key, 0, sizeof(key));
key.vr_id = fib->vr->id;
key.proto = fib->proto;
return rhashtable_lookup_fast(&nh_grp->vr_ht, &key,
mlxsw_sp_nexthop_group_vr_ht_params);
}
static int
mlxsw_sp_nexthop_group_vr_entry_create(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
int err;
vr_entry = kzalloc(sizeof(*vr_entry), GFP_KERNEL);
if (!vr_entry)
return -ENOMEM;
vr_entry->key.vr_id = fib->vr->id;
vr_entry->key.proto = fib->proto;
refcount_set(&vr_entry->ref_count, 1);
err = rhashtable_insert_fast(&nh_grp->vr_ht, &vr_entry->ht_node,
mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_hashtable_insert;
list_add(&vr_entry->list, &nh_grp->vr_list);
return 0;
err_hashtable_insert:
kfree(vr_entry);
return err;
}
static void
mlxsw_sp_nexthop_group_vr_entry_destroy(struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry)
{
list_del(&vr_entry->list);
rhashtable_remove_fast(&nh_grp->vr_ht, &vr_entry->ht_node,
mlxsw_sp_nexthop_group_vr_ht_params);
kfree(vr_entry);
}
static int
mlxsw_sp_nexthop_group_vr_link(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib);
if (vr_entry) {
refcount_inc(&vr_entry->ref_count);
return 0;
}
return mlxsw_sp_nexthop_group_vr_entry_create(nh_grp, fib);
}
static void
mlxsw_sp_nexthop_group_vr_unlink(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib);
if (WARN_ON_ONCE(!vr_entry))
return;
if (!refcount_dec_and_test(&vr_entry->ref_count))
return;
mlxsw_sp_nexthop_group_vr_entry_destroy(nh_grp, vr_entry);
}
struct mlxsw_sp_nexthop_group_cmp_arg {
enum mlxsw_sp_nexthop_group_type type;
union {
struct fib_info *fi;
struct mlxsw_sp_fib6_entry *fib6_entry;
u32 id;
};
};
static bool
mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct in6_addr *gw, int ifindex,
int weight)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
const struct mlxsw_sp_nexthop *nh;
nh = &nh_grp->nhgi->nexthops[i];
if (nh->ifindex == ifindex && nh->nh_weight == weight &&
ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr))
return true;
}
return false;
}
static bool
mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
if (nh_grp->nhgi->count != fib6_entry->nrt6)
return false;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct in6_addr *gw;
int ifindex, weight;
ifindex = fib6_nh->fib_nh_dev->ifindex;
weight = fib6_nh->fib_nh_weight;
gw = &fib6_nh->fib_nh_gw6;
if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex,
weight))
return false;
}
return true;
}
static int
mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr)
{
const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key;
const struct mlxsw_sp_nexthop_group *nh_grp = ptr;
if (nh_grp->type != cmp_arg->type)
return 1;
switch (cmp_arg->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
return cmp_arg->fi != nh_grp->ipv4.fi;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
return !mlxsw_sp_nexthop6_group_cmp(nh_grp,
cmp_arg->fib6_entry);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return cmp_arg->id != nh_grp->obj.id;
default:
WARN_ON(1);
return 1;
}
}
static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed)
{
const struct mlxsw_sp_nexthop_group *nh_grp = data;
const struct mlxsw_sp_nexthop *nh;
struct fib_info *fi;
unsigned int val;
int i;
switch (nh_grp->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
fi = nh_grp->ipv4.fi;
return jhash(&fi, sizeof(fi), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
val = nh_grp->nhgi->count;
for (i = 0; i < nh_grp->nhgi->count; i++) {
nh = &nh_grp->nhgi->nexthops[i];
val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
val ^= jhash(&nh->gw_addr, sizeof(nh->gw_addr), seed);
}
return jhash(&val, sizeof(val), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return jhash(&nh_grp->obj.id, sizeof(nh_grp->obj.id), seed);
default:
WARN_ON(1);
return 0;
}
}
static u32
mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed)
{
unsigned int val = fib6_entry->nrt6;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct net_device *dev = fib6_nh->fib_nh_dev;
struct in6_addr *gw = &fib6_nh->fib_nh_gw6;
val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), seed);
val ^= jhash(gw, sizeof(*gw), seed);
}
return jhash(&val, sizeof(val), seed);
}
static u32
mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed)
{
const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data;
switch (cmp_arg->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed);
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
return jhash(&cmp_arg->id, sizeof(cmp_arg->id), seed);
default:
WARN_ON(1);
return 0;
}
}
static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = {
.head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node),
.hashfn = mlxsw_sp_nexthop_group_hash,
.obj_hashfn = mlxsw_sp_nexthop_group_hash_obj,
.obj_cmpfn = mlxsw_sp_nexthop_group_cmp,
};
static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 &&
!nh_grp->nhgi->gateway)
return 0;
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 &&
!nh_grp->nhgi->gateway)
return;
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp,
struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4;
cmp_arg.fi = fi;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6;
cmp_arg.fib6_entry = fib6_entry;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_key),
};
static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht,
&nh->ht_node, mlxsw_sp_nexthop_ht_params);
}
static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node,
mlxsw_sp_nexthop_ht_params);
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_key key)
{
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key,
mlxsw_sp_nexthop_ht_params);
}
static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_l3proto proto,
u16 vr_id,
u32 adj_index, u16 ecmp_size,
u32 new_adj_index,
u16 new_ecmp_size)
{
char raleu_pl[MLXSW_REG_RALEU_LEN];
mlxsw_reg_raleu_pack(raleu_pl,
(enum mlxsw_reg_ralxx_protocol) proto, vr_id,
adj_index, ecmp_size, new_adj_index,
new_ecmp_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl);
}
static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
u32 old_adj_index, u16 old_ecmp_size)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
struct mlxsw_sp_nexthop_group_vr_entry *vr_entry;
int err;
list_for_each_entry(vr_entry, &nh_grp->vr_list, list) {
err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp,
vr_entry->key.proto,
vr_entry->key.vr_id,
old_adj_index,
old_ecmp_size,
nhgi->adj_index,
nhgi->ecmp_size);
if (err)
goto err_mass_update_vr;
}
return 0;
err_mass_update_vr:
list_for_each_entry_continue_reverse(vr_entry, &nh_grp->vr_list, list)
mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, vr_entry->key.proto,
vr_entry->key.vr_id,
nhgi->adj_index,
nhgi->ecmp_size,
old_adj_index, old_ecmp_size);
return err;
}
static int __mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp,
u32 adj_index,
struct mlxsw_sp_nexthop *nh,
bool force, char *ratr_pl)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
enum mlxsw_reg_ratr_op op;
u16 rif_index;
rif_index = nh->rif ? nh->rif->rif_index :
mlxsw_sp->router->lb_rif_index;
op = force ? MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY :
MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY_ON_ACTIVITY;
mlxsw_reg_ratr_pack(ratr_pl, op, true, MLXSW_REG_RATR_TYPE_ETHERNET,
adj_index, rif_index);
switch (nh->action) {
case MLXSW_SP_NEXTHOP_ACTION_FORWARD:
mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha);
break;
case MLXSW_SP_NEXTHOP_ACTION_DISCARD:
mlxsw_reg_ratr_trap_action_set(ratr_pl,
MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS);
break;
case MLXSW_SP_NEXTHOP_ACTION_TRAP:
mlxsw_reg_ratr_trap_action_set(ratr_pl,
MLXSW_REG_RATR_TRAP_ACTION_TRAP);
mlxsw_reg_ratr_trap_id_set(ratr_pl, MLXSW_TRAP_ID_RTR_EGRESS0);
break;
default:
WARN_ON_ONCE(1);
return -EINVAL;
}
if (nh->counter_valid)
mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true);
else
mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}
int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
struct mlxsw_sp_nexthop *nh, bool force,
char *ratr_pl)
{
int i;
for (i = 0; i < nh->num_adj_entries; i++) {
int err;
err = __mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index + i,
nh, force, ratr_pl);
if (err)
return err;
}
return 0;
}
static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
u32 adj_index,
struct mlxsw_sp_nexthop *nh,
bool force, char *ratr_pl)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt];
return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry,
force, ratr_pl);
}
static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
u32 adj_index,
struct mlxsw_sp_nexthop *nh, bool force,
char *ratr_pl)
{
int i;
for (i = 0; i < nh->num_adj_entries; i++) {
int err;
err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i,
nh, force, ratr_pl);
if (err)
return err;
}
return 0;
}
static int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
struct mlxsw_sp_nexthop *nh, bool force,
char *ratr_pl)
{
/* When action is discard or trap, the nexthop must be
* programmed as an Ethernet nexthop.
*/
if (nh->type == MLXSW_SP_NEXTHOP_TYPE_ETH ||
nh->action == MLXSW_SP_NEXTHOP_ACTION_DISCARD ||
nh->action == MLXSW_SP_NEXTHOP_ACTION_TRAP)
return mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index, nh,
force, ratr_pl);
else
return mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index, nh,
force, ratr_pl);
}
static int
mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group_info *nhgi,
bool reallocate)
{
char ratr_pl[MLXSW_REG_RATR_LEN];
u32 adj_index = nhgi->adj_index; /* base */
struct mlxsw_sp_nexthop *nh;
int i;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload) {
nh->offloaded = 0;
continue;
}
if (nh->update || reallocate) {
int err = 0;
err = mlxsw_sp_nexthop_update(mlxsw_sp, adj_index, nh,
true, ratr_pl);
if (err)
return err;
nh->update = 0;
nh->offloaded = 1;
}
adj_index += nh->num_adj_entries;
}
return 0;
}
static int
mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_fib_entry *fib_entry;
int err;
list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) {
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
return err;
}
return 0;
}
struct mlxsw_sp_adj_grp_size_range {
u16 start; /* Inclusive */
u16 end; /* Inclusive */
};
/* Ordered by range start value */
static const struct mlxsw_sp_adj_grp_size_range
mlxsw_sp1_adj_grp_size_ranges[] = {
{ .start = 1, .end = 64 },
{ .start = 512, .end = 512 },
{ .start = 1024, .end = 1024 },
{ .start = 2048, .end = 2048 },
{ .start = 4096, .end = 4096 },
};
/* Ordered by range start value */
static const struct mlxsw_sp_adj_grp_size_range
mlxsw_sp2_adj_grp_size_ranges[] = {
{ .start = 1, .end = 128 },
{ .start = 256, .end = 256 },
{ .start = 512, .end = 512 },
{ .start = 1024, .end = 1024 },
{ .start = 2048, .end = 2048 },
{ .start = 4096, .end = 4096 },
};
static void mlxsw_sp_adj_grp_size_round_up(const struct mlxsw_sp *mlxsw_sp,
u16 *p_adj_grp_size)
{
int i;
for (i = 0; i < mlxsw_sp->router->adj_grp_size_ranges_count; i++) {
const struct mlxsw_sp_adj_grp_size_range *size_range;
size_range = &mlxsw_sp->router->adj_grp_size_ranges[i];
if (*p_adj_grp_size >= size_range->start &&
*p_adj_grp_size <= size_range->end)
return;
if (*p_adj_grp_size <= size_range->end) {
*p_adj_grp_size = size_range->end;
return;
}
}
}
static void mlxsw_sp_adj_grp_size_round_down(const struct mlxsw_sp *mlxsw_sp,
u16 *p_adj_grp_size,
unsigned int alloc_size)
{
int i;
for (i = mlxsw_sp->router->adj_grp_size_ranges_count - 1; i >= 0; i--) {
const struct mlxsw_sp_adj_grp_size_range *size_range;
size_range = &mlxsw_sp->router->adj_grp_size_ranges[i];
if (alloc_size >= size_range->end) {
*p_adj_grp_size = size_range->end;
return;
}
}
}
static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp,
u16 *p_adj_grp_size)
{
unsigned int alloc_size;
int err;
/* Round up the requested group size to the next size supported
* by the device and make sure the request can be satisfied.
*/
mlxsw_sp_adj_grp_size_round_up(mlxsw_sp, p_adj_grp_size);
err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp,
MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
*p_adj_grp_size, &alloc_size);
if (err)
return err;
/* It is possible the allocation results in more allocated
* entries than requested. Try to use as much of them as
* possible.
*/
mlxsw_sp_adj_grp_size_round_down(mlxsw_sp, p_adj_grp_size, alloc_size);
return 0;
}
static void
mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group_info *nhgi)
{
int i, g = 0, sum_norm_weight = 0;
struct mlxsw_sp_nexthop *nh;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload)
continue;
if (g > 0)
g = gcd(nh->nh_weight, g);
else
g = nh->nh_weight;
}
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (!nh->should_offload)
continue;
nh->norm_nh_weight = nh->nh_weight / g;
sum_norm_weight += nh->norm_nh_weight;
}
nhgi->sum_norm_weight = sum_norm_weight;
}
static void
mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group_info *nhgi)
{
int i, weight = 0, lower_bound = 0;
int total = nhgi->sum_norm_weight;
u16 ecmp_size = nhgi->ecmp_size;
for (i = 0; i < nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
int upper_bound;
if (!nh->should_offload)
continue;
weight += nh->norm_nh_weight;
upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total);
nh->num_adj_entries = upper_bound - lower_bound;
lower_bound = upper_bound;
}
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_rt6 *mlxsw_sp_rt6);
static void
mlxsw_sp_nexthop4_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i];
if (nh->offloaded)
nh->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD;
else
nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
}
}
static void
__mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
struct mlxsw_sp_nexthop *nh;
nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6);
if (nh && nh->offloaded)
fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD;
else
fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
}
}
static void
mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
/* Unfortunately, in IPv6 the route and the nexthop are described by
* the same struct, so we need to iterate over all the routes using the
* nexthop group and set / clear the offload indication for them.
*/
list_for_each_entry(fib6_entry, &nh_grp->fib_list,
common.nexthop_group_node)
__mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry);
}
static void
mlxsw_sp_nexthop_bucket_offload_refresh(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_nexthop *nh,
u16 bucket_index)
{
struct mlxsw_sp_nexthop_group *nh_grp = nh->nhgi->nh_grp;
bool offload = false, trap = false;
if (nh->offloaded) {
if (nh->action == MLXSW_SP_NEXTHOP_ACTION_TRAP)
trap = true;
else
offload = true;
}
nexthop_bucket_set_hw_flags(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id,
bucket_index, offload, trap);
}
static void
mlxsw_sp_nexthop_obj_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
int i;
/* Do not update the flags if the nexthop group is being destroyed
* since:
* 1. The nexthop objects is being deleted, in which case the flags are
* irrelevant.
* 2. The nexthop group was replaced by a newer group, in which case
* the flags of the nexthop object were already updated based on the
* new group.
*/
if (nh_grp->can_destroy)
return;
nexthop_set_hw_flags(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id,
nh_grp->nhgi->adj_index_valid, false);
/* Update flags of individual nexthop buckets in case of a resilient
* nexthop group.
*/
if (!nh_grp->nhgi->is_resilient)
return;
for (i = 0; i < nh_grp->nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i];
mlxsw_sp_nexthop_bucket_offload_refresh(mlxsw_sp, nh, i);
}
}
static void
mlxsw_sp_nexthop_group_offload_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
switch (nh_grp->type) {
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4:
mlxsw_sp_nexthop4_group_offload_refresh(mlxsw_sp, nh_grp);
break;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6:
mlxsw_sp_nexthop6_group_offload_refresh(mlxsw_sp, nh_grp);
break;
case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ:
mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, nh_grp);
break;
}
}
static int
mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
u16 ecmp_size, old_ecmp_size;
struct mlxsw_sp_nexthop *nh;
bool offload_change = false;
u32 adj_index;
bool old_adj_index_valid;
u32 old_adj_index;
int i, err2, err;
if (!nhgi->gateway)
return mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
if (nh->should_offload != nh->offloaded) {
offload_change = true;
if (nh->should_offload)
nh->update = 1;
}
}
if (!offload_change) {
/* Nothing was added or removed, so no need to reallocate. Just
* update MAC on existing adjacency indexes.
*/
err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, false);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
/* Flags of individual nexthop buckets might need to be
* updated.
*/
mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp);
return 0;
}
mlxsw_sp_nexthop_group_normalize(nhgi);
if (!nhgi->sum_norm_weight) {
/* No neigh of this group is connected so we just set
* the trap and let everthing flow through kernel.
*/
err = 0;
goto set_trap;
}
ecmp_size = nhgi->sum_norm_weight;
err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size);
if (err)
/* No valid allocation size available. */
goto set_trap;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
ecmp_size, &adj_index);
if (err) {
/* We ran out of KVD linear space, just set the
* trap and let everything flow through kernel.
*/
dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n");
goto set_trap;
}
old_adj_index_valid = nhgi->adj_index_valid;
old_adj_index = nhgi->adj_index;
old_ecmp_size = nhgi->ecmp_size;
nhgi->adj_index_valid = 1;
nhgi->adj_index = adj_index;
nhgi->ecmp_size = ecmp_size;
mlxsw_sp_nexthop_group_rebalance(nhgi);
err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, true);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp);
if (!old_adj_index_valid) {
/* The trap was set for fib entries, so we have to call
* fib entry update to unset it and use adjacency index.
*/
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n");
goto set_trap;
}
return 0;
}
err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp,
old_adj_index, old_ecmp_size);
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
old_ecmp_size, old_adj_index);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n");
goto set_trap;
}
return 0;
set_trap:
old_adj_index_valid = nhgi->adj_index_valid;
nhgi->adj_index_valid = 0;
for (i = 0; i < nhgi->count; i++) {
nh = &nhgi->nexthops[i];
nh->offloaded = 0;
}
err2 = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err2)
dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n");
mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp);
if (old_adj_index_valid)
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
nhgi->ecmp_size, nhgi->adj_index);
return err;
}
static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh,
bool removing)
{
if (!removing) {
nh->action = MLXSW_SP_NEXTHOP_ACTION_FORWARD;
nh->should_offload = 1;
} else if (nh->nhgi->is_resilient) {
nh->action = MLXSW_SP_NEXTHOP_ACTION_TRAP;
nh->should_offload = 1;
} else {
nh->should_offload = 0;
}
nh->update = 1;
}
static int
mlxsw_sp_nexthop_dead_neigh_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
struct neighbour *n, *old_n = neigh_entry->key.n;
struct mlxsw_sp_nexthop *nh;
bool entry_connected;
u8 nud_state, dead;
int err;
nh = list_first_entry(&neigh_entry->nexthop_list,
struct mlxsw_sp_nexthop, neigh_list_node);
n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (!n) {
n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (IS_ERR(n))
return PTR_ERR(n);
neigh_event_send(n, NULL);
}
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
neigh_entry->key.n = n;
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
read_lock_bh(&n->lock);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
entry_connected = nud_state & NUD_VALID && !dead;
list_for_each_entry(nh, &neigh_entry->nexthop_list,
neigh_list_node) {
neigh_release(old_n);
neigh_clone(n);
__mlxsw_sp_nexthop_neigh_update(nh, !entry_connected);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
neigh_release(n);
return 0;
err_neigh_entry_insert:
neigh_entry->key.n = old_n;
mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
neigh_release(n);
return err;
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing, bool dead)
{
struct mlxsw_sp_nexthop *nh;
if (list_empty(&neigh_entry->nexthop_list))
return;
if (dead) {
int err;
err = mlxsw_sp_nexthop_dead_neigh_replace(mlxsw_sp,
neigh_entry);
if (err)
dev_err(mlxsw_sp->bus_info->dev, "Failed to replace dead neigh\n");
return;
}
list_for_each_entry(nh, &neigh_entry->nexthop_list,
neigh_list_node) {
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_rif *rif)
{
if (nh->rif)
return;
nh->rif = rif;
list_add(&nh->rif_list_node, &rif->nexthop_list);
}
static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh)
{
if (!nh->rif)
return;
list_del(&nh->rif_list_node);
nh->rif = NULL;
}
static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct neighbour *n;
u8 nud_state, dead;
int err;
if (!nh->nhgi->gateway || nh->neigh_entry)
return 0;
/* Take a reference of neigh here ensuring that neigh would
* not be destructed before the nexthop entry is finished.
* The reference is taken either in neigh_lookup() or
* in neigh_create() in case n is not found.
*/
n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (!n) {
n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev);
if (IS_ERR(n))
return PTR_ERR(n);
neigh_event_send(n, NULL);
}
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry)) {
err = -EINVAL;
goto err_neigh_entry_create;
}
}
/* If that is the first nexthop connected to that neigh, add to
* nexthop_neighs_list
*/
if (list_empty(&neigh_entry->nexthop_list))
list_add_tail(&neigh_entry->nexthop_neighs_list_node,
&mlxsw_sp->router->nexthop_neighs_list);
nh->neigh_entry = neigh_entry;
list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list);
read_lock_bh(&n->lock);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
__mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead));
return 0;
err_neigh_entry_create:
neigh_release(n);
return err;
}
static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
struct neighbour *n;
if (!neigh_entry)
return;
n = neigh_entry->key.n;
__mlxsw_sp_nexthop_neigh_update(nh, true);
list_del(&nh->neigh_list_node);
nh->neigh_entry = NULL;
/* If that is the last nexthop connected to that neigh, remove from
* nexthop_neighs_list
*/
if (list_empty(&neigh_entry->nexthop_list))
list_del(&neigh_entry->nexthop_neighs_list_node);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
neigh_release(n);
}
static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev)
{
struct net_device *ul_dev;
bool is_up;
rcu_read_lock();
ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev);
is_up = ul_dev ? (ul_dev->flags & IFF_UP) : true;
rcu_read_unlock();
return is_up;
}
static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_ipip_entry *ipip_entry)
{
bool removing;
if (!nh->nhgi->gateway || nh->ipip_entry)
return;
nh->ipip_entry = ipip_entry;
removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev);
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common);
}
static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry;
if (!ipip_entry)
return;
__mlxsw_sp_nexthop_neigh_update(nh, true);
nh->ipip_entry = NULL;
}
static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct fib_nh *fib_nh,
enum mlxsw_sp_ipip_type *p_ipipt)
{
struct net_device *dev = fib_nh->fib_nh_dev;
return dev &&
fib_nh->nh_parent->fib_type == RTN_UNICAST &&
mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt);
}
static int mlxsw_sp_nexthop_type_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
const struct net_device *dev)
{
const struct mlxsw_sp_ipip_ops *ipip_ops;
struct mlxsw_sp_ipip_entry *ipip_entry;
struct mlxsw_sp_rif *rif;
int err;
ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev);
if (ipip_entry) {
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
if (ipip_ops->can_offload(mlxsw_sp, dev)) {
nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP;
mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry);
return 0;
}
}
nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
mlxsw_sp_nexthop_rif_init(nh, rif);
err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh);
if (err)
goto err_neigh_init;
return 0;
err_neigh_init:
mlxsw_sp_nexthop_rif_fini(nh);
return err;
}
static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
switch (nh->type) {
case MLXSW_SP_NEXTHOP_TYPE_ETH:
mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_rif_fini(nh);
break;
case MLXSW_SP_NEXTHOP_TYPE_IPIP:
mlxsw_sp_nexthop_rif_fini(nh);
mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh);
break;
}
}
static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
struct fib_nh *fib_nh)
{
struct net_device *dev = fib_nh->fib_nh_dev;
struct in_device *in_dev;
int err;
nh->nhgi = nh_grp->nhgi;
nh->key.fib_nh = fib_nh;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
nh->nh_weight = fib_nh->fib_nh_weight;
#else
nh->nh_weight = 1;
#endif
memcpy(&nh->gw_addr, &fib_nh->fib_nh_gw4, sizeof(fib_nh->fib_nh_gw4));
nh->neigh_tbl = &arp_tbl;
err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh);
if (err)
return err;
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
if (!dev)
return 0;
nh->ifindex = dev->ifindex;
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) {
rcu_read_unlock();
return 0;
}
rcu_read_unlock();
err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
if (err)
goto err_nexthop_neigh_init;
return 0;
err_nexthop_neigh_init:
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
}
static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp,
unsigned long event, struct fib_nh *fib_nh)
{
struct mlxsw_sp_nexthop_key key;
struct mlxsw_sp_nexthop *nh;
key.fib_nh = fib_nh;
nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key);
if (!nh)
return;
switch (event) {
case FIB_EVENT_NH_ADD:
mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, fib_nh->fib_nh_dev);
break;
case FIB_EVENT_NH_DEL:
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
break;
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_nexthop *nh;
bool removing;
list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) {
switch (nh->type) {
case MLXSW_SP_NEXTHOP_TYPE_ETH:
removing = false;
break;
case MLXSW_SP_NEXTHOP_TYPE_IPIP:
removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev);
break;
default:
WARN_ON(1);
continue;
}
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *old_rif,
struct mlxsw_sp_rif *new_rif)
{
struct mlxsw_sp_nexthop *nh;
list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list);
list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node)
nh->rif = new_rif;
mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif);
}
static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_nexthop *nh, *tmp;
list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) {
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp);
}
}
static int mlxsw_sp_adj_trap_entry_init(struct mlxsw_sp *mlxsw_sp)
{
enum mlxsw_reg_ratr_trap_action trap_action;
char ratr_pl[MLXSW_REG_RATR_LEN];
int err;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
&mlxsw_sp->router->adj_trap_index);
if (err)
return err;
trap_action = MLXSW_REG_RATR_TRAP_ACTION_TRAP;
mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true,
MLXSW_REG_RATR_TYPE_ETHERNET,
mlxsw_sp->router->adj_trap_index,
mlxsw_sp->router->lb_rif_index);
mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action);
mlxsw_reg_ratr_trap_id_set(ratr_pl, MLXSW_TRAP_ID_RTR_EGRESS0);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
if (err)
goto err_ratr_write;
return 0;
err_ratr_write:
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
mlxsw_sp->router->adj_trap_index);
return err;
}
static void mlxsw_sp_adj_trap_entry_fini(struct mlxsw_sp *mlxsw_sp)
{
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1,
mlxsw_sp->router->adj_trap_index);
}
static int mlxsw_sp_nexthop_group_inc(struct mlxsw_sp *mlxsw_sp)
{
int err;
if (refcount_inc_not_zero(&mlxsw_sp->router->num_groups))
return 0;
err = mlxsw_sp_adj_trap_entry_init(mlxsw_sp);
if (err)
return err;
refcount_set(&mlxsw_sp->router->num_groups, 1);
return 0;
}
static void mlxsw_sp_nexthop_group_dec(struct mlxsw_sp *mlxsw_sp)
{
if (!refcount_dec_and_test(&mlxsw_sp->router->num_groups))
return;
mlxsw_sp_adj_trap_entry_fini(mlxsw_sp);
}
static void
mlxsw_sp_nh_grp_activity_get(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_nexthop_group *nh_grp,
unsigned long *activity)
{
char *ratrad_pl;
int i, err;
ratrad_pl = kmalloc(MLXSW_REG_RATRAD_LEN, GFP_KERNEL);
if (!ratrad_pl)
return;
mlxsw_reg_ratrad_pack(ratrad_pl, nh_grp->nhgi->adj_index,
nh_grp->nhgi->count);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ratrad), ratrad_pl);
if (err)
goto out;
for (i = 0; i < nh_grp->nhgi->count; i++) {
if (!mlxsw_reg_ratrad_activity_vector_get(ratrad_pl, i))
continue;
bitmap_set(activity, i, 1);
}
out:
kfree(ratrad_pl);
}
#define MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL 1000 /* ms */
static void
mlxsw_sp_nh_grp_activity_update(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_nexthop_group *nh_grp)
{
unsigned long *activity;
activity = bitmap_zalloc(nh_grp->nhgi->count, GFP_KERNEL);
if (!activity)
return;
mlxsw_sp_nh_grp_activity_get(mlxsw_sp, nh_grp, activity);
nexthop_res_grp_activity_update(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id,
nh_grp->nhgi->count, activity);
bitmap_free(activity);
}
static void
mlxsw_sp_nh_grp_activity_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
unsigned int interval = MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL;
mlxsw_core_schedule_dw(&mlxsw_sp->router->nh_grp_activity_dw,
msecs_to_jiffies(interval));
}
static void mlxsw_sp_nh_grp_activity_work(struct work_struct *work)
{
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_router *router;
bool reschedule = false;
router = container_of(work, struct mlxsw_sp_router,
nh_grp_activity_dw.work);
mutex_lock(&router->lock);
list_for_each_entry(nhgi, &router->nh_res_grp_list, list) {
mlxsw_sp_nh_grp_activity_update(router->mlxsw_sp, nhgi->nh_grp);
reschedule = true;
}
mutex_unlock(&router->lock);
if (!reschedule)
return;
mlxsw_sp_nh_grp_activity_work_schedule(router->mlxsw_sp);
}
static int
mlxsw_sp_nexthop_obj_single_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_single_info *nh,
struct netlink_ext_ack *extack)
{
int err = -EINVAL;
if (nh->is_fdb)
NL_SET_ERR_MSG_MOD(extack, "FDB nexthops are not supported");
else if (nh->has_encap)
NL_SET_ERR_MSG_MOD(extack, "Encapsulating nexthops are not supported");
else
err = 0;
return err;
}
static int
mlxsw_sp_nexthop_obj_group_entry_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_single_info *nh,
struct netlink_ext_ack *extack)
{
int err;
err = mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, nh, extack);
if (err)
return err;
/* Device only nexthops with an IPIP device are programmed as
* encapsulating adjacency entries.
*/
if (!nh->gw_family && !nh->is_reject &&
!mlxsw_sp_netdev_ipip_type(mlxsw_sp, nh->dev, NULL)) {
NL_SET_ERR_MSG_MOD(extack, "Nexthop group entry does not have a gateway");
return -EINVAL;
}
return 0;
}
static int
mlxsw_sp_nexthop_obj_group_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_grp_info *nh_grp,
struct netlink_ext_ack *extack)
{
int i;
if (nh_grp->is_fdb) {
NL_SET_ERR_MSG_MOD(extack, "FDB nexthop groups are not supported");
return -EINVAL;
}
for (i = 0; i < nh_grp->num_nh; i++) {
const struct nh_notifier_single_info *nh;
int err;
nh = &nh_grp->nh_entries[i].nh;
err = mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh,
extack);
if (err)
return err;
}
return 0;
}
static int
mlxsw_sp_nexthop_obj_res_group_size_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_res_table_info *nh_res_table,
struct netlink_ext_ack *extack)
{
unsigned int alloc_size;
bool valid_size = false;
int err, i;
if (nh_res_table->num_nh_buckets < 32) {
NL_SET_ERR_MSG_MOD(extack, "Minimum number of buckets is 32");
return -EINVAL;
}
for (i = 0; i < mlxsw_sp->router->adj_grp_size_ranges_count; i++) {
const struct mlxsw_sp_adj_grp_size_range *size_range;
size_range = &mlxsw_sp->router->adj_grp_size_ranges[i];
if (nh_res_table->num_nh_buckets >= size_range->start &&
nh_res_table->num_nh_buckets <= size_range->end) {
valid_size = true;
break;
}
}
if (!valid_size) {
NL_SET_ERR_MSG_MOD(extack, "Invalid number of buckets");
return -EINVAL;
}
err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp,
MLXSW_SP_KVDL_ENTRY_TYPE_ADJ,
nh_res_table->num_nh_buckets,
&alloc_size);
if (err || nh_res_table->num_nh_buckets != alloc_size) {
NL_SET_ERR_MSG_MOD(extack, "Number of buckets does not fit allocation size of any KVDL partition");
return -EINVAL;
}
return 0;
}
static int
mlxsw_sp_nexthop_obj_res_group_validate(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_res_table_info *nh_res_table,
struct netlink_ext_ack *extack)
{
int err;
u16 i;
err = mlxsw_sp_nexthop_obj_res_group_size_validate(mlxsw_sp,
nh_res_table,
extack);
if (err)
return err;
for (i = 0; i < nh_res_table->num_nh_buckets; i++) {
const struct nh_notifier_single_info *nh;
int err;
nh = &nh_res_table->nhs[i];
err = mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh,
extack);
if (err)
return err;
}
return 0;
}
static int mlxsw_sp_nexthop_obj_validate(struct mlxsw_sp *mlxsw_sp,
unsigned long event,
struct nh_notifier_info *info)
{
struct nh_notifier_single_info *nh;
if (event != NEXTHOP_EVENT_REPLACE &&
event != NEXTHOP_EVENT_RES_TABLE_PRE_REPLACE &&
event != NEXTHOP_EVENT_BUCKET_REPLACE)
return 0;
switch (info->type) {
case NH_NOTIFIER_INFO_TYPE_SINGLE:
return mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, info->nh,
info->extack);
case NH_NOTIFIER_INFO_TYPE_GRP:
return mlxsw_sp_nexthop_obj_group_validate(mlxsw_sp,
info->nh_grp,
info->extack);
case NH_NOTIFIER_INFO_TYPE_RES_TABLE:
return mlxsw_sp_nexthop_obj_res_group_validate(mlxsw_sp,
info->nh_res_table,
info->extack);
case NH_NOTIFIER_INFO_TYPE_RES_BUCKET:
nh = &info->nh_res_bucket->new_nh;
return mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh,
info->extack);
default:
NL_SET_ERR_MSG_MOD(info->extack, "Unsupported nexthop type");
return -EOPNOTSUPP;
}
}
static bool mlxsw_sp_nexthop_obj_is_gateway(struct mlxsw_sp *mlxsw_sp,
const struct nh_notifier_info *info)
{
const struct net_device *dev;
switch (info->type) {
case NH_NOTIFIER_INFO_TYPE_SINGLE:
dev = info->nh->dev;
return info->nh->gw_family || info->nh->is_reject ||
mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL);
case NH_NOTIFIER_INFO_TYPE_GRP:
case NH_NOTIFIER_INFO_TYPE_RES_TABLE:
/* Already validated earlier. */
return true;
default:
return false;
}
}
static void mlxsw_sp_nexthop_obj_blackhole_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
u16 lb_rif_index = mlxsw_sp->router->lb_rif_index;
nh->action = MLXSW_SP_NEXTHOP_ACTION_DISCARD;
nh->should_offload = 1;
/* While nexthops that discard packets do not forward packets
* via an egress RIF, they still need to be programmed using a
* valid RIF, so use the loopback RIF created during init.
*/
nh->rif = mlxsw_sp->router->rifs[lb_rif_index];
}
static void mlxsw_sp_nexthop_obj_blackhole_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
nh->rif = NULL;
nh->should_offload = 0;
}
static int
mlxsw_sp_nexthop_obj_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
struct nh_notifier_single_info *nh_obj, int weight)
{
struct net_device *dev = nh_obj->dev;
int err;
nh->nhgi = nh_grp->nhgi;
nh->nh_weight = weight;
switch (nh_obj->gw_family) {
case AF_INET:
memcpy(&nh->gw_addr, &nh_obj->ipv4, sizeof(nh_obj->ipv4));
nh->neigh_tbl = &arp_tbl;
break;
case AF_INET6:
memcpy(&nh->gw_addr, &nh_obj->ipv6, sizeof(nh_obj->ipv6));
#if IS_ENABLED(CONFIG_IPV6)
nh->neigh_tbl = &nd_tbl;
#endif
break;
}
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
nh->ifindex = dev->ifindex;
err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
if (err)
goto err_type_init;
if (nh_obj->is_reject)
mlxsw_sp_nexthop_obj_blackhole_init(mlxsw_sp, nh);
/* In a resilient nexthop group, all the nexthops must be written to
* the adjacency table. Even if they do not have a valid neighbour or
* RIF.
*/
if (nh_grp->nhgi->is_resilient && !nh->should_offload) {
nh->action = MLXSW_SP_NEXTHOP_ACTION_TRAP;
nh->should_offload = 1;
}
return 0;
err_type_init:
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop_obj_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
if (nh->action == MLXSW_SP_NEXTHOP_ACTION_DISCARD)
mlxsw_sp_nexthop_obj_blackhole_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
nh->should_offload = 0;
}
static int
mlxsw_sp_nexthop_obj_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_nexthop *nh;
bool is_resilient = false;
unsigned int nhs;
int err, i;
switch (info->type) {
case NH_NOTIFIER_INFO_TYPE_SINGLE:
nhs = 1;
break;
case NH_NOTIFIER_INFO_TYPE_GRP:
nhs = info->nh_grp->num_nh;
break;
case NH_NOTIFIER_INFO_TYPE_RES_TABLE:
nhs = info->nh_res_table->num_nh_buckets;
is_resilient = true;
break;
default:
return -EINVAL;
}
nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
nhgi->gateway = mlxsw_sp_nexthop_obj_is_gateway(mlxsw_sp, info);
nhgi->is_resilient = is_resilient;
nhgi->count = nhs;
for (i = 0; i < nhgi->count; i++) {
struct nh_notifier_single_info *nh_obj;
int weight;
nh = &nhgi->nexthops[i];
switch (info->type) {
case NH_NOTIFIER_INFO_TYPE_SINGLE:
nh_obj = info->nh;
weight = 1;
break;
case NH_NOTIFIER_INFO_TYPE_GRP:
nh_obj = &info->nh_grp->nh_entries[i].nh;
weight = info->nh_grp->nh_entries[i].weight;
break;
case NH_NOTIFIER_INFO_TYPE_RES_TABLE:
nh_obj = &info->nh_res_table->nhs[i];
weight = 1;
break;
default:
err = -EINVAL;
goto err_nexthop_obj_init;
}
err = mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj,
weight);
if (err)
goto err_nexthop_obj_init;
}
err = mlxsw_sp_nexthop_group_inc(mlxsw_sp);
if (err)
goto err_group_inc;
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "Failed to write adjacency entries to the device");
goto err_group_refresh;
}
/* Add resilient nexthop groups to a list so that the activity of their
* nexthop buckets will be periodically queried and cleared.
*/
if (nhgi->is_resilient) {
if (list_empty(&mlxsw_sp->router->nh_res_grp_list))
mlxsw_sp_nh_grp_activity_work_schedule(mlxsw_sp);
list_add(&nhgi->list, &mlxsw_sp->router->nh_res_grp_list);
}
return 0;
err_group_refresh:
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
err_group_inc:
i = nhgi->count;
err_nexthop_obj_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop_obj_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
struct mlxsw_sp_router *router = mlxsw_sp->router;
int i;
if (nhgi->is_resilient) {
list_del(&nhgi->list);
if (list_empty(&mlxsw_sp->router->nh_res_grp_list))
cancel_delayed_work(&router->nh_grp_activity_dw);
}
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_obj_group_create(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ;
nh_grp->obj.id = info->id;
err = mlxsw_sp_nexthop_obj_group_info_init(mlxsw_sp, nh_grp, info);
if (err)
goto err_nexthop_group_info_init;
nh_grp->can_destroy = false;
return nh_grp;
err_nexthop_group_info_init:
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop_obj_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_obj_group_info_fini(mlxsw_sp, nh_grp);
WARN_ON_ONCE(!list_empty(&nh_grp->fib_list));
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_obj_group_lookup(struct mlxsw_sp *mlxsw_sp, u32 id)
{
struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg;
cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ;
cmp_arg.id = id;
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht,
&cmp_arg,
mlxsw_sp_nexthop_group_ht_params);
}
static int mlxsw_sp_nexthop_obj_group_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
return mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
}
static int
mlxsw_sp_nexthop_obj_group_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop_group *old_nh_grp,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_nexthop_group_info *old_nhgi = old_nh_grp->nhgi;
struct mlxsw_sp_nexthop_group_info *new_nhgi = nh_grp->nhgi;
int err;
old_nh_grp->nhgi = new_nhgi;
new_nhgi->nh_grp = old_nh_grp;
nh_grp->nhgi = old_nhgi;
old_nhgi->nh_grp = nh_grp;
if (old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) {
/* Both the old adjacency index and the new one are valid.
* Routes are currently using the old one. Tell the device to
* replace the old adjacency index with the new one.
*/
err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, old_nh_grp,
old_nhgi->adj_index,
old_nhgi->ecmp_size);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to replace old adjacency index with new one");
goto err_out;
}
} else if (old_nhgi->adj_index_valid && !new_nhgi->adj_index_valid) {
/* The old adjacency index is valid, while the new one is not.
* Iterate over all the routes using the group and change them
* to trap packets to the CPU.
*/
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to trap packets");
goto err_out;
}
} else if (!old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) {
/* The old adjacency index is invalid, while the new one is.
* Iterate over all the routes using the group and change them
* to forward packets using the new valid index.
*/
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to forward packets");
goto err_out;
}
}
/* Make sure the flags are set / cleared based on the new nexthop group
* information.
*/
mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, old_nh_grp);
/* At this point 'nh_grp' is just a shell that is not used by anyone
* and its nexthop group info is the old info that was just replaced
* with the new one. Remove it.
*/
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return 0;
err_out:
old_nhgi->nh_grp = old_nh_grp;
nh_grp->nhgi = new_nhgi;
new_nhgi->nh_grp = nh_grp;
old_nh_grp->nhgi = old_nhgi;
return err;
}
static int mlxsw_sp_nexthop_obj_new(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp, *old_nh_grp;
struct netlink_ext_ack *extack = info->extack;
int err;
nh_grp = mlxsw_sp_nexthop_obj_group_create(mlxsw_sp, info);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
old_nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id);
if (!old_nh_grp)
err = mlxsw_sp_nexthop_obj_group_add(mlxsw_sp, nh_grp);
else
err = mlxsw_sp_nexthop_obj_group_replace(mlxsw_sp, nh_grp,
old_nh_grp, extack);
if (err) {
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
}
return err;
}
static void mlxsw_sp_nexthop_obj_del(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
struct mlxsw_sp_nexthop_group *nh_grp;
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id);
if (!nh_grp)
return;
nh_grp->can_destroy = true;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
/* If the group still has routes using it, then defer the delete
* operation until the last route using it is deleted.
*/
if (!list_empty(&nh_grp->fib_list))
return;
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
}
static int mlxsw_sp_nexthop_obj_bucket_query(struct mlxsw_sp *mlxsw_sp,
u32 adj_index, char *ratr_pl)
{
MLXSW_REG_ZERO(ratr, ratr_pl);
mlxsw_reg_ratr_op_set(ratr_pl, MLXSW_REG_RATR_OP_QUERY_READ);
mlxsw_reg_ratr_adjacency_index_low_set(ratr_pl, adj_index);
mlxsw_reg_ratr_adjacency_index_high_set(ratr_pl, adj_index >> 16);
return mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}
static int mlxsw_sp_nexthop_obj_bucket_compare(char *ratr_pl, char *ratr_pl_new)
{
/* Clear the opcode and activity on both the old and new payload as
* they are irrelevant for the comparison.
*/
mlxsw_reg_ratr_op_set(ratr_pl, MLXSW_REG_RATR_OP_QUERY_READ);
mlxsw_reg_ratr_a_set(ratr_pl, 0);
mlxsw_reg_ratr_op_set(ratr_pl_new, MLXSW_REG_RATR_OP_QUERY_READ);
mlxsw_reg_ratr_a_set(ratr_pl_new, 0);
/* If the contents of the adjacency entry are consistent with the
* replacement request, then replacement was successful.
*/
if (!memcmp(ratr_pl, ratr_pl_new, MLXSW_REG_RATR_LEN))
return 0;
return -EINVAL;
}
static int
mlxsw_sp_nexthop_obj_bucket_adj_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh,
struct nh_notifier_info *info)
{
u16 bucket_index = info->nh_res_bucket->bucket_index;
struct netlink_ext_ack *extack = info->extack;
bool force = info->nh_res_bucket->force;
char ratr_pl_new[MLXSW_REG_RATR_LEN];
char ratr_pl[MLXSW_REG_RATR_LEN];
u32 adj_index;
int err;
/* No point in trying an atomic replacement if the idle timer interval
* is smaller than the interval in which we query and clear activity.
*/
if (!force && info->nh_res_bucket->idle_timer_ms <
MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL)
force = true;
adj_index = nh->nhgi->adj_index + bucket_index;
err = mlxsw_sp_nexthop_update(mlxsw_sp, adj_index, nh, force, ratr_pl);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to overwrite nexthop bucket");
return err;
}
if (!force) {
err = mlxsw_sp_nexthop_obj_bucket_query(mlxsw_sp, adj_index,
ratr_pl_new);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to query nexthop bucket state after replacement. State might be inconsistent");
return err;
}
err = mlxsw_sp_nexthop_obj_bucket_compare(ratr_pl, ratr_pl_new);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Nexthop bucket was not replaced because it was active during replacement");
return err;
}
}
nh->update = 0;
nh->offloaded = 1;
mlxsw_sp_nexthop_bucket_offload_refresh(mlxsw_sp, nh, bucket_index);
return 0;
}
static int mlxsw_sp_nexthop_obj_bucket_replace(struct mlxsw_sp *mlxsw_sp,
struct nh_notifier_info *info)
{
u16 bucket_index = info->nh_res_bucket->bucket_index;
struct netlink_ext_ack *extack = info->extack;
struct mlxsw_sp_nexthop_group_info *nhgi;
struct nh_notifier_single_info *nh_obj;
struct mlxsw_sp_nexthop_group *nh_grp;
struct mlxsw_sp_nexthop *nh;
int err;
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id);
if (!nh_grp) {
NL_SET_ERR_MSG_MOD(extack, "Nexthop group was not found");
return -EINVAL;
}
nhgi = nh_grp->nhgi;
if (bucket_index >= nhgi->count) {
NL_SET_ERR_MSG_MOD(extack, "Nexthop bucket index out of range");
return -EINVAL;
}
nh = &nhgi->nexthops[bucket_index];
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
nh_obj = &info->nh_res_bucket->new_nh;
err = mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj, 1);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to initialize nexthop object for nexthop bucket replacement");
goto err_nexthop_obj_init;
}
err = mlxsw_sp_nexthop_obj_bucket_adj_update(mlxsw_sp, nh, info);
if (err)
goto err_nexthop_obj_bucket_adj_update;
return 0;
err_nexthop_obj_bucket_adj_update:
mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh);
err_nexthop_obj_init:
nh_obj = &info->nh_res_bucket->old_nh;
mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj, 1);
/* The old adjacency entry was not overwritten */
nh->update = 0;
nh->offloaded = 1;
return err;
}
static int mlxsw_sp_nexthop_obj_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct nh_notifier_info *info = ptr;
struct mlxsw_sp_router *router;
int err = 0;
router = container_of(nb, struct mlxsw_sp_router, nexthop_nb);
err = mlxsw_sp_nexthop_obj_validate(router->mlxsw_sp, event, info);
if (err)
goto out;
mutex_lock(&router->lock);
switch (event) {
case NEXTHOP_EVENT_REPLACE:
err = mlxsw_sp_nexthop_obj_new(router->mlxsw_sp, info);
break;
case NEXTHOP_EVENT_DEL:
mlxsw_sp_nexthop_obj_del(router->mlxsw_sp, info);
break;
case NEXTHOP_EVENT_BUCKET_REPLACE:
err = mlxsw_sp_nexthop_obj_bucket_replace(router->mlxsw_sp,
info);
break;
default:
break;
}
mutex_unlock(&router->lock);
out:
return notifier_from_errno(err);
}
static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp,
struct fib_info *fi)
{
const struct fib_nh *nh = fib_info_nh(fi, 0);
return nh->fib_nh_gw_family ||
mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL);
}
static int
mlxsw_sp_nexthop4_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
unsigned int nhs = fib_info_num_path(nh_grp->ipv4.fi);
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_nexthop *nh;
int err, i;
nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
nhgi->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, nh_grp->ipv4.fi);
nhgi->count = nhs;
for (i = 0; i < nhgi->count; i++) {
struct fib_nh *fib_nh;
nh = &nhgi->nexthops[i];
fib_nh = fib_info_nh(nh_grp->ipv4.fi, i);
err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh);
if (err)
goto err_nexthop4_init;
}
err = mlxsw_sp_nexthop_group_inc(mlxsw_sp);
if (err)
goto err_group_inc;
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err)
goto err_group_refresh;
return 0;
err_group_refresh:
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
err_group_inc:
i = nhgi->count;
err_nexthop4_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop4_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop4_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
int i;
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop4_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4;
nh_grp->ipv4.fi = fi;
fib_info_hold(fi);
err = mlxsw_sp_nexthop4_group_info_init(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_info_init;
err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_insert;
nh_grp->can_destroy = true;
return nh_grp;
err_nexthop_group_insert:
mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp);
err_nexthop_group_info_init:
fib_info_put(fi);
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp);
fib_info_put(nh_grp->ipv4.fi);
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group *nh_grp;
if (fi->nh) {
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp,
fi->nh->id);
if (WARN_ON_ONCE(!nh_grp))
return -EINVAL;
goto out;
}
nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi);
if (!nh_grp) {
nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
}
out:
list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list);
fib_entry->nh_group = nh_grp;
return 0;
}
static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group;
list_del(&fib_entry->nexthop_group_node);
if (!list_empty(&nh_grp->fib_list))
return;
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) {
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return;
}
mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp);
}
static bool
mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
return !fib4_entry->dscp;
}
static bool
mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group;
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
if (!mlxsw_sp_fib4_entry_should_offload(fib_entry))
return false;
break;
case MLXSW_SP_L3_PROTO_IPV6:
break;
}
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return !!nh_group->nhgi->adj_index_valid;
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return !!nh_group->nhgi->nh_rif;
case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE:
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP:
return true;
default:
return false;
}
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_rt6 *mlxsw_sp_rt6)
{
int i;
for (i = 0; i < nh_grp->nhgi->count; i++) {
struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i];
struct fib6_info *rt = mlxsw_sp_rt6->rt;
if (nh->rif && nh->rif->dev == rt->fib6_nh->fib_nh_dev &&
ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr,
&rt->fib6_nh->fib_nh_gw6))
return nh;
}
return NULL;
}
static void
mlxsw_sp_fib4_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp,
struct fib_entry_notifier_info *fen_info)
{
u32 *p_dst = (u32 *) &fen_info->dst;
struct fib_rt_info fri;
fri.fi = fen_info->fi;
fri.tb_id = fen_info->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = fen_info->dst_len;
fri.dscp = fen_info->dscp;
fri.type = fen_info->type;
fri.offload = false;
fri.trap = false;
fri.offload_failed = true;
fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
}
static void
mlxsw_sp_fib4_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr;
int dst_len = fib_entry->fib_node->key.prefix_len;
struct mlxsw_sp_fib4_entry *fib4_entry;
struct fib_rt_info fri;
bool should_offload;
should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry);
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
fri.fi = fib4_entry->fi;
fri.tb_id = fib4_entry->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = dst_len;
fri.dscp = fib4_entry->dscp;
fri.type = fib4_entry->type;
fri.offload = should_offload;
fri.trap = !should_offload;
fri.offload_failed = false;
fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
}
static void
mlxsw_sp_fib4_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr;
int dst_len = fib_entry->fib_node->key.prefix_len;
struct mlxsw_sp_fib4_entry *fib4_entry;
struct fib_rt_info fri;
fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry,
common);
fri.fi = fib4_entry->fi;
fri.tb_id = fib4_entry->tb_id;
fri.dst = cpu_to_be32(*p_dst);
fri.dst_len = dst_len;
fri.dscp = fib4_entry->dscp;
fri.type = fib4_entry->type;
fri.offload = false;
fri.trap = false;
fri.offload_failed = false;
fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri);
}
#if IS_ENABLED(CONFIG_IPV6)
static void
mlxsw_sp_fib6_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp,
struct fib6_info **rt_arr,
unsigned int nrt6)
{
int i;
/* In IPv6 a multipath route is represented using multiple routes, so
* we need to set the flags on all of them.
*/
for (i = 0; i < nrt6; i++)
fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), rt_arr[i],
false, false, true);
}
#else
static void
mlxsw_sp_fib6_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp,
struct fib6_info **rt_arr,
unsigned int nrt6)
{
}
#endif
#if IS_ENABLED(CONFIG_IPV6)
static void
mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
bool should_offload;
should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry);
/* In IPv6 a multipath route is represented using multiple routes, so
* we need to set the flags on all of them.
*/
fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry,
common);
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list)
fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt,
should_offload, !should_offload, false);
}
#else
static void
mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
}
#endif
#if IS_ENABLED(CONFIG_IPV6)
static void
mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry,
common);
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list)
fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt,
false, false, false);
}
#else
static void
mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
}
#endif
static void
mlxsw_sp_fib_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_sp_fib6_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
}
}
static void
mlxsw_sp_fib_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_sp_fib6_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
}
}
static void
mlxsw_sp_fib_entry_hw_flags_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
switch (op) {
case MLXSW_REG_RALUE_OP_WRITE_WRITE:
mlxsw_sp_fib_entry_hw_flags_set(mlxsw_sp, fib_entry);
break;
case MLXSW_REG_RALUE_OP_WRITE_DELETE:
mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, fib_entry);
break;
default:
break;
}
}
static void
mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl,
const struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib;
enum mlxsw_reg_ralxx_protocol proto;
u32 *p_dip;
proto = (enum mlxsw_reg_ralxx_protocol) fib->proto;
switch (fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
p_dip = (u32 *) fib_entry->fib_node->key.addr;
mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id,
fib_entry->fib_node->key.prefix_len,
*p_dip);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id,
fib_entry->fib_node->key.prefix_len,
fib_entry->fib_node->key.addr);
break;
}
}
static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group;
struct mlxsw_sp_nexthop_group_info *nhgi = nh_group->nhgi;
char ralue_pl[MLXSW_REG_RALUE_LEN];
enum mlxsw_reg_ralue_trap_action trap_action;
u16 trap_id = 0;
u32 adjacency_index = 0;
u16 ecmp_size = 0;
/* In case the nexthop group adjacency index is valid, use it
* with provided ECMP size. Otherwise, setup trap and pass
* traffic to kernel.
*/
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
adjacency_index = nhgi->adj_index;
ecmp_size = nhgi->ecmp_size;
} else if (!nhgi->adj_index_valid && nhgi->count && nhgi->nh_rif) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
adjacency_index = mlxsw_sp->router->adj_trap_index;
ecmp_size = 1;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id,
adjacency_index, ecmp_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_rif *rif = fib_entry->nh_group->nhgi->nh_rif;
enum mlxsw_reg_ralue_trap_action trap_action;
char ralue_pl[MLXSW_REG_RALUE_LEN];
u16 trap_id = 0;
u16 rif_index = 0;
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
rif_index = rif->rif_index;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id,
rif_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
char ralue_pl[MLXSW_REG_RALUE_LEN];
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_ip2me_pack(ralue_pl);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
enum mlxsw_reg_ralue_trap_action trap_action;
char ralue_pl[MLXSW_REG_RALUE_LEN];
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR;
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, 0, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int
mlxsw_sp_fib_entry_op_unreachable(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
enum mlxsw_reg_ralue_trap_action trap_action;
char ralue_pl[MLXSW_REG_RALUE_LEN];
u16 trap_id;
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS1;
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int
mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry;
const struct mlxsw_sp_ipip_ops *ipip_ops;
char ralue_pl[MLXSW_REG_RALUE_LEN];
int err;
if (WARN_ON(!ipip_entry))
return -EINVAL;
ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt];
err = ipip_ops->decap_config(mlxsw_sp, ipip_entry,
fib_entry->decap.tunnel_index);
if (err)
return err;
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl,
fib_entry->decap.tunnel_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
char ralue_pl[MLXSW_REG_RALUE_LEN];
mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op);
mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl,
fib_entry->decap.tunnel_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_TRAP:
return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE:
return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE:
return mlxsw_sp_fib_entry_op_unreachable(mlxsw_sp, fib_entry,
op);
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp,
fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP:
return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, fib_entry, op);
}
return -EINVAL;
}
static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op);
if (err)
return err;
mlxsw_sp_fib_entry_hw_flags_refresh(mlxsw_sp, fib_entry, op);
return err;
}
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry,
MLXSW_REG_RALUE_OP_WRITE_WRITE);
}
static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry,
MLXSW_REG_RALUE_OP_WRITE_DELETE);
}
static int
mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group_info *nhgi = fib_entry->nh_group->nhgi;
union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) };
struct mlxsw_sp_router *router = mlxsw_sp->router;
u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id);
int ifindex = nhgi->nexthops[0].ifindex;
struct mlxsw_sp_ipip_entry *ipip_entry;
switch (fen_info->type) {
case RTN_LOCAL:
ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, ifindex,
MLXSW_SP_L3_PROTO_IPV4, dip);
if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) {
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
return mlxsw_sp_fib_entry_decap_init(mlxsw_sp,
fib_entry,
ipip_entry);
}
if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id,
MLXSW_SP_L3_PROTO_IPV4,
&dip)) {
u32 tunnel_index;
tunnel_index = router->nve_decap_config.tunnel_index;
fib_entry->decap.tunnel_index = tunnel_index;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
return 0;
}
fallthrough;
case RTN_BROADCAST:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
return 0;
case RTN_BLACKHOLE:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE;
return 0;
case RTN_UNREACHABLE:
case RTN_PROHIBIT:
/* Packets hitting these routes need to be trapped, but
* can do so with a lower priority than packets directed
* at the host, so use action type local instead of trap.
*/
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE;
return 0;
case RTN_UNICAST:
if (nhgi->gateway)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE;
else
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
return 0;
default:
return -EINVAL;
}
}
static void
mlxsw_sp_fib_entry_type_unset(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP:
mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry);
break;
default:
break;
}
}
static void
mlxsw_sp_fib4_entry_type_unset(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib4_entry *fib4_entry)
{
mlxsw_sp_fib_entry_type_unset(mlxsw_sp, &fib4_entry->common);
}
static struct mlxsw_sp_fib4_entry *
mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_entry *fib_entry;
int err;
fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL);
if (!fib4_entry)
return ERR_PTR(-ENOMEM);
fib_entry = &fib4_entry->common;
err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi);
if (err)
goto err_nexthop4_group_get;
err = mlxsw_sp_nexthop_group_vr_link(fib_entry->nh_group,
fib_node->fib);
if (err)
goto err_nexthop_group_vr_link;
err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry);
if (err)
goto err_fib4_entry_type_set;
fib4_entry->fi = fen_info->fi;
fib_info_hold(fib4_entry->fi);
fib4_entry->tb_id = fen_info->tb_id;
fib4_entry->type = fen_info->type;
fib4_entry->dscp = fen_info->dscp;
fib_entry->fib_node = fib_node;
return fib4_entry;
err_fib4_entry_type_set:
mlxsw_sp_nexthop_group_vr_unlink(fib_entry->nh_group, fib_node->fib);
err_nexthop_group_vr_link:
mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common);
err_nexthop4_group_get:
kfree(fib4_entry);
return ERR_PTR(err);
}
static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib4_entry *fib4_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node;
fib_info_put(fib4_entry->fi);
mlxsw_sp_fib4_entry_type_unset(mlxsw_sp, fib4_entry);
mlxsw_sp_nexthop_group_vr_unlink(fib4_entry->common.nh_group,
fib_node->fib);
mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common);
kfree(fib4_entry);
}
static struct mlxsw_sp_fib4_entry *
mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id);
if (!vr)
return NULL;
fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4);
fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst,
sizeof(fen_info->dst),
fen_info->dst_len);
if (!fib_node)
return NULL;
fib4_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib4_entry, common);
if (fib4_entry->tb_id == fen_info->tb_id &&
fib4_entry->dscp == fen_info->dscp &&
fib4_entry->type == fen_info->type &&
fib4_entry->fi == fen_info->fi)
return fib4_entry;
return NULL;
}
static const struct rhashtable_params mlxsw_sp_fib_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_fib_node, key),
.head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node),
.key_len = sizeof(struct mlxsw_sp_fib_key),
.automatic_shrinking = true,
};
static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
rhashtable_remove_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len)
{
struct mlxsw_sp_fib_key key;
memset(&key, 0, sizeof(key));
memcpy(key.addr, addr, addr_len);
key.prefix_len = prefix_len;
return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len)
{
struct mlxsw_sp_fib_node *fib_node;
fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL);
if (!fib_node)
return NULL;
list_add(&fib_node->list, &fib->node_list);
memcpy(fib_node->key.addr, addr, addr_len);
fib_node->key.prefix_len = prefix_len;
return fib_node;
}
static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node)
{
list_del(&fib_node->list);
kfree(fib_node);
}
static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_prefix_usage req_prefix_usage;
struct mlxsw_sp_fib *fib = fib_node->fib;
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
lpm_tree = mlxsw_sp->router->lpm.proto_trees[fib->proto];
if (lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0)
goto out;
mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage);
mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len);
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
fib->proto);
if (IS_ERR(lpm_tree))
return PTR_ERR(lpm_tree);
err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree);
if (err)
goto err_lpm_tree_replace;
out:
lpm_tree->prefix_ref_count[fib_node->key.prefix_len]++;
return 0;
err_lpm_tree_replace:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
return err;
}
static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree;
struct mlxsw_sp_prefix_usage req_prefix_usage;
struct mlxsw_sp_fib *fib = fib_node->fib;
int err;
if (--lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0)
return;
/* Try to construct a new LPM tree from the current prefix usage
* minus the unused one. If we fail, continue using the old one.
*/
mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage);
mlxsw_sp_prefix_usage_clear(&req_prefix_usage,
fib_node->key.prefix_len);
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
fib->proto);
if (IS_ERR(lpm_tree))
return;
err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree);
if (err)
goto err_lpm_tree_replace;
return;
err_lpm_tree_replace:
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
}
static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib *fib)
{
int err;
err = mlxsw_sp_fib_node_insert(fib, fib_node);
if (err)
return err;
fib_node->fib = fib;
err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib_node);
if (err)
goto err_fib_lpm_tree_link;
return 0;
err_fib_lpm_tree_link:
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
return err;
}
static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_fib *fib = fib_node->fib;
mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib_node);
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr,
size_t addr_len, unsigned char prefix_len,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL);
if (IS_ERR(vr))
return ERR_CAST(vr);
fib = mlxsw_sp_vr_fib(vr, proto);
fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len);
if (fib_node)
return fib_node;
fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len);
if (!fib_node) {
err = -ENOMEM;
goto err_fib_node_create;
}
err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib);
if (err)
goto err_fib_node_init;
return fib_node;
err_fib_node_init:
mlxsw_sp_fib_node_destroy(fib_node);
err_fib_node_create:
mlxsw_sp_vr_put(mlxsw_sp, vr);
return ERR_PTR(err);
}
static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_vr *vr = fib_node->fib->vr;
if (fib_node->fib_entry)
return;
mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node);
mlxsw_sp_fib_node_destroy(fib_node);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
static int mlxsw_sp_fib_node_entry_link(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
int err;
fib_node->fib_entry = fib_entry;
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
goto err_fib_entry_update;
return 0;
err_fib_entry_update:
fib_node->fib_entry = NULL;
return err;
}
static void
mlxsw_sp_fib_node_entry_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry);
fib_node->fib_entry = NULL;
}
static bool mlxsw_sp_fib4_allow_replace(struct mlxsw_sp_fib4_entry *fib4_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node;
struct mlxsw_sp_fib4_entry *fib4_replaced;
if (!fib_node->fib_entry)
return true;
fib4_replaced = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib4_entry, common);
if (fib4_entry->tb_id == RT_TABLE_MAIN &&
fib4_replaced->tb_id == RT_TABLE_LOCAL)
return false;
return true;
}
static int
mlxsw_sp_router_fib4_replace(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry, *fib4_replaced;
struct mlxsw_sp_fib_entry *replaced;
struct mlxsw_sp_fib_node *fib_node;
int err;
if (fen_info->fi->nh &&
!mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, fen_info->fi->nh->id))
return 0;
fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id,
&fen_info->dst, sizeof(fen_info->dst),
fen_info->dst_len,
MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(fib_node)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n");
return PTR_ERR(fib_node);
}
fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info);
if (IS_ERR(fib4_entry)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n");
err = PTR_ERR(fib4_entry);
goto err_fib4_entry_create;
}
if (!mlxsw_sp_fib4_allow_replace(fib4_entry)) {
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return 0;
}
replaced = fib_node->fib_entry;
err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib4_entry->common);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n");
goto err_fib_node_entry_link;
}
/* Nothing to replace */
if (!replaced)
return 0;
mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced);
fib4_replaced = container_of(replaced, struct mlxsw_sp_fib4_entry,
common);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_replaced);
return 0;
err_fib_node_entry_link:
fib_node->fib_entry = replaced;
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
err_fib4_entry_create:
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err;
}
static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp,
struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
struct mlxsw_sp_fib_node *fib_node;
fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info);
if (!fib4_entry)
return;
fib_node = fib4_entry->common.fib_node;
mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib4_entry->common);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
}
static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt)
{
/* Multicast routes aren't supported, so ignore them. Neighbour
* Discovery packets are specifically trapped.
*/
if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST)
return true;
/* Cloned routes are irrelevant in the forwarding path. */
if (rt->fib6_flags & RTF_CACHE)
return true;
return false;
}
static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL);
if (!mlxsw_sp_rt6)
return ERR_PTR(-ENOMEM);
/* In case of route replace, replaced route is deleted with
* no notification. Take reference to prevent accessing freed
* memory.
*/
mlxsw_sp_rt6->rt = rt;
fib6_info_hold(rt);
return mlxsw_sp_rt6;
}
#if IS_ENABLED(CONFIG_IPV6)
static void mlxsw_sp_rt6_release(struct fib6_info *rt)
{
fib6_info_release(rt);
}
#else
static void mlxsw_sp_rt6_release(struct fib6_info *rt)
{
}
#endif
static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6)
{
struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh;
if (!mlxsw_sp_rt6->rt->nh)
fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt);
kfree(mlxsw_sp_rt6);
}
static struct fib6_info *
mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry)
{
return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6,
list)->rt;
}
static struct mlxsw_sp_rt6 *
mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry,
const struct fib6_info *rt)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
if (mlxsw_sp_rt6->rt == rt)
return mlxsw_sp_rt6;
}
return NULL;
}
static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt,
enum mlxsw_sp_ipip_type *ret)
{
return rt->fib6_nh->fib_nh_dev &&
mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret);
}
static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
const struct fib6_info *rt)
{
struct net_device *dev = rt->fib6_nh->fib_nh_dev;
int err;
nh->nhgi = nh_grp->nhgi;
nh->nh_weight = rt->fib6_nh->fib_nh_weight;
memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr));
#if IS_ENABLED(CONFIG_IPV6)
nh->neigh_tbl = &nd_tbl;
#endif
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list);
if (!dev)
return 0;
nh->ifindex = dev->ifindex;
err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev);
if (err)
goto err_nexthop_type_init;
return 0;
err_nexthop_type_init:
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh);
list_del(&nh->router_list_node);
mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
}
static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt)
{
return rt->fib6_nh->fib_nh_gw_family ||
mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL);
}
static int
mlxsw_sp_nexthop6_group_info_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group_info *nhgi;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
struct mlxsw_sp_nexthop *nh;
int err, i;
nhgi = kzalloc(struct_size(nhgi, nexthops, fib6_entry->nrt6),
GFP_KERNEL);
if (!nhgi)
return -ENOMEM;
nh_grp->nhgi = nhgi;
nhgi->nh_grp = nh_grp;
mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list,
struct mlxsw_sp_rt6, list);
nhgi->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt);
nhgi->count = fib6_entry->nrt6;
for (i = 0; i < nhgi->count; i++) {
struct fib6_info *rt = mlxsw_sp_rt6->rt;
nh = &nhgi->nexthops[i];
err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt);
if (err)
goto err_nexthop6_init;
mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list);
}
nh_grp->nhgi = nhgi;
err = mlxsw_sp_nexthop_group_inc(mlxsw_sp);
if (err)
goto err_group_inc;
err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
if (err)
goto err_group_refresh;
return 0;
err_group_refresh:
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
err_group_inc:
i = nhgi->count;
err_nexthop6_init:
for (i--; i >= 0; i--) {
nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop6_fini(mlxsw_sp, nh);
}
kfree(nhgi);
return err;
}
static void
mlxsw_sp_nexthop6_group_info_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi;
int i;
mlxsw_sp_nexthop_group_dec(mlxsw_sp);
for (i = nhgi->count - 1; i >= 0; i--) {
struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i];
mlxsw_sp_nexthop6_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nhgi->adj_index_valid);
kfree(nhgi);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp;
int err;
nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->vr_list);
err = rhashtable_init(&nh_grp->vr_ht,
&mlxsw_sp_nexthop_group_vr_ht_params);
if (err)
goto err_nexthop_group_vr_ht_init;
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6;
err = mlxsw_sp_nexthop6_group_info_init(mlxsw_sp, nh_grp, fib6_entry);
if (err)
goto err_nexthop_group_info_init;
err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_insert;
nh_grp->can_destroy = true;
return nh_grp;
err_nexthop_group_insert:
mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp);
err_nexthop_group_info_init:
rhashtable_destroy(&nh_grp->vr_ht);
err_nexthop_group_vr_ht_init:
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
if (!nh_grp->can_destroy)
return;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp);
WARN_ON_ONCE(!list_empty(&nh_grp->vr_list));
rhashtable_destroy(&nh_grp->vr_ht);
kfree(nh_grp);
}
static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry);
struct mlxsw_sp_nexthop_group *nh_grp;
if (rt->nh) {
nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp,
rt->nh->id);
if (WARN_ON_ONCE(!nh_grp))
return -EINVAL;
goto out;
}
nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry);
if (!nh_grp) {
nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
}
/* The route and the nexthop are described by the same struct, so we
* need to the update the nexthop offload indication for the new route.
*/
__mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry);
out:
list_add_tail(&fib6_entry->common.nexthop_group_node,
&nh_grp->fib_list);
fib6_entry->common.nh_group = nh_grp;
return 0;
}
static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group;
list_del(&fib_entry->nexthop_group_node);
if (!list_empty(&nh_grp->fib_list))
return;
if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) {
mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp);
return;
}
mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp);
}
static int
mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group;
struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node;
int err;
mlxsw_sp_nexthop_group_vr_unlink(old_nh_grp, fib_node->fib);
fib6_entry->common.nh_group = NULL;
list_del(&fib6_entry->common.nexthop_group_node);
err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry);
if (err)
goto err_nexthop6_group_get;
err = mlxsw_sp_nexthop_group_vr_link(fib6_entry->common.nh_group,
fib_node->fib);
if (err)
goto err_nexthop_group_vr_link;
/* In case this entry is offloaded, then the adjacency index
* currently associated with it in the device's table is that
* of the old group. Start using the new one instead.
*/
err = mlxsw_sp_fib_entry_update(mlxsw_sp, &fib6_entry->common);
if (err)
goto err_fib_entry_update;
if (list_empty(&old_nh_grp->fib_list))
mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp);
return 0;
err_fib_entry_update:
mlxsw_sp_nexthop_group_vr_unlink(fib6_entry->common.nh_group,
fib_node->fib);
err_nexthop_group_vr_link:
mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common);
err_nexthop6_group_get:
list_add_tail(&fib6_entry->common.nexthop_group_node,
&old_nh_grp->fib_list);
fib6_entry->common.nh_group = old_nh_grp;
mlxsw_sp_nexthop_group_vr_link(old_nh_grp, fib_node->fib);
return err;
}
static int
mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry,
struct fib6_info **rt_arr, unsigned int nrt6)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
int err, i;
for (i = 0; i < nrt6; i++) {
mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]);
if (IS_ERR(mlxsw_sp_rt6)) {
err = PTR_ERR(mlxsw_sp_rt6);
goto err_rt6_unwind;
}
list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list);
fib6_entry->nrt6++;
}
err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry);
if (err)
goto err_rt6_unwind;
return 0;
err_rt6_unwind:
for (; i > 0; i--) {
fib6_entry->nrt6--;
mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list,
struct mlxsw_sp_rt6, list);
list_del(&mlxsw_sp_rt6->list);
mlxsw_sp_rt6_destroy(mlxsw_sp_rt6);
}
return err;
}
static void
mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry,
struct fib6_info **rt_arr, unsigned int nrt6)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
int i;
for (i = 0; i < nrt6; i++) {
mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry,
rt_arr[i]);
if (WARN_ON_ONCE(!mlxsw_sp_rt6))
continue;
fib6_entry->nrt6--;
list_del(&mlxsw_sp_rt6->list);
mlxsw_sp_rt6_destroy(mlxsw_sp_rt6);
}
mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry);
}
static int
mlxsw_sp_fib6_entry_type_set_local(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
const struct fib6_info *rt)
{
struct mlxsw_sp_nexthop_group_info *nhgi = fib_entry->nh_group->nhgi;
union mlxsw_sp_l3addr dip = { .addr6 = rt->fib6_dst.addr };
u32 tb_id = mlxsw_sp_fix_tb_id(rt->fib6_table->tb6_id);
struct mlxsw_sp_router *router = mlxsw_sp->router;
int ifindex = nhgi->nexthops[0].ifindex;
struct mlxsw_sp_ipip_entry *ipip_entry;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, ifindex,
MLXSW_SP_L3_PROTO_IPV6,
dip);
if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) {
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP;
return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, fib_entry,
ipip_entry);
}
if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id,
MLXSW_SP_L3_PROTO_IPV6, &dip)) {
u32 tunnel_index;
tunnel_index = router->nve_decap_config.tunnel_index;
fib_entry->decap.tunnel_index = tunnel_index;
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
}
return 0;
}
static int mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
const struct fib6_info *rt)
{
if (rt->fib6_flags & RTF_LOCAL)
return mlxsw_sp_fib6_entry_type_set_local(mlxsw_sp, fib_entry,
rt);
if (rt->fib6_flags & RTF_ANYCAST)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
else if (rt->fib6_type == RTN_BLACKHOLE)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE;
else if (rt->fib6_flags & RTF_REJECT)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE;
else if (fib_entry->nh_group->nhgi->gateway)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE;
else
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
return 0;
}
static void
mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp;
list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list,
list) {
fib6_entry->nrt6--;
list_del(&mlxsw_sp_rt6->list);
mlxsw_sp_rt6_destroy(mlxsw_sp_rt6);
}
}
static struct mlxsw_sp_fib6_entry *
mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
struct fib6_info **rt_arr, unsigned int nrt6)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_rt6 *mlxsw_sp_rt6;
int err, i;
fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL);
if (!fib6_entry)
return ERR_PTR(-ENOMEM);
fib_entry = &fib6_entry->common;
INIT_LIST_HEAD(&fib6_entry->rt6_list);
for (i = 0; i < nrt6; i++) {
mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]);
if (IS_ERR(mlxsw_sp_rt6)) {
err = PTR_ERR(mlxsw_sp_rt6);
goto err_rt6_unwind;
}
list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list);
fib6_entry->nrt6++;
}
err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry);
if (err)
goto err_rt6_unwind;
err = mlxsw_sp_nexthop_group_vr_link(fib_entry->nh_group,
fib_node->fib);
if (err)
goto err_nexthop_group_vr_link;
err = mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]);
if (err)
goto err_fib6_entry_type_set;
fib_entry->fib_node = fib_node;
return fib6_entry;
err_fib6_entry_type_set:
mlxsw_sp_nexthop_group_vr_unlink(fib_entry->nh_group, fib_node->fib);
err_nexthop_group_vr_link:
mlxsw_sp_nexthop6_group_put(mlxsw_sp, fib_entry);
err_rt6_unwind:
for (; i > 0; i--) {
fib6_entry->nrt6--;
mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list,
struct mlxsw_sp_rt6, list);
list_del(&mlxsw_sp_rt6->list);
mlxsw_sp_rt6_destroy(mlxsw_sp_rt6);
}
kfree(fib6_entry);
return ERR_PTR(err);
}
static void
mlxsw_sp_fib6_entry_type_unset(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
mlxsw_sp_fib_entry_type_unset(mlxsw_sp, &fib6_entry->common);
}
static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node;
mlxsw_sp_fib6_entry_type_unset(mlxsw_sp, fib6_entry);
mlxsw_sp_nexthop_group_vr_unlink(fib6_entry->common.nh_group,
fib_node->fib);
mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common);
mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry);
WARN_ON(fib6_entry->nrt6);
kfree(fib6_entry);
}
static struct mlxsw_sp_fib6_entry *
mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp,
const struct fib6_info *rt)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct fib6_info *cmp_rt;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, rt->fib6_table->tb6_id);
if (!vr)
return NULL;
fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6);
fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr,
sizeof(rt->fib6_dst.addr),
rt->fib6_dst.plen);
if (!fib_node)
return NULL;
fib6_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib6_entry, common);
cmp_rt = mlxsw_sp_fib6_entry_rt(fib6_entry);
if (rt->fib6_table->tb6_id == cmp_rt->fib6_table->tb6_id &&
rt->fib6_metric == cmp_rt->fib6_metric &&
mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt))
return fib6_entry;
return NULL;
}
static bool mlxsw_sp_fib6_allow_replace(struct mlxsw_sp_fib6_entry *fib6_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node;
struct mlxsw_sp_fib6_entry *fib6_replaced;
struct fib6_info *rt, *rt_replaced;
if (!fib_node->fib_entry)
return true;
fib6_replaced = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib6_entry,
common);
rt = mlxsw_sp_fib6_entry_rt(fib6_entry);
rt_replaced = mlxsw_sp_fib6_entry_rt(fib6_replaced);
if (rt->fib6_table->tb6_id == RT_TABLE_MAIN &&
rt_replaced->fib6_table->tb6_id == RT_TABLE_LOCAL)
return false;
return true;
}
static int mlxsw_sp_router_fib6_replace(struct mlxsw_sp *mlxsw_sp,
struct fib6_info **rt_arr,
unsigned int nrt6)
{
struct mlxsw_sp_fib6_entry *fib6_entry, *fib6_replaced;
struct mlxsw_sp_fib_entry *replaced;
struct mlxsw_sp_fib_node *fib_node;
struct fib6_info *rt = rt_arr[0];
int err;
if (rt->fib6_src.plen)
return -EINVAL;
if (mlxsw_sp_fib6_rt_should_ignore(rt))
return 0;
if (rt->nh && !mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, rt->nh->id))
return 0;
fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id,
&rt->fib6_dst.addr,
sizeof(rt->fib6_dst.addr),
rt->fib6_dst.plen,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(fib_node))
return PTR_ERR(fib_node);
fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr,
nrt6);
if (IS_ERR(fib6_entry)) {
err = PTR_ERR(fib6_entry);
goto err_fib6_entry_create;
}
if (!mlxsw_sp_fib6_allow_replace(fib6_entry)) {
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return 0;
}
replaced = fib_node->fib_entry;
err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib6_entry->common);
if (err)
goto err_fib_node_entry_link;
/* Nothing to replace */
if (!replaced)
return 0;
mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced);
fib6_replaced = container_of(replaced, struct mlxsw_sp_fib6_entry,
common);
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_replaced);
return 0;
err_fib_node_entry_link:
fib_node->fib_entry = replaced;
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry);
err_fib6_entry_create:
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err;
}
static int mlxsw_sp_router_fib6_append(struct mlxsw_sp *mlxsw_sp,
struct fib6_info **rt_arr,
unsigned int nrt6)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_fib_node *fib_node;
struct fib6_info *rt = rt_arr[0];
int err;
if (rt->fib6_src.plen)
return -EINVAL;
if (mlxsw_sp_fib6_rt_should_ignore(rt))
return 0;
fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id,
&rt->fib6_dst.addr,
sizeof(rt->fib6_dst.addr),
rt->fib6_dst.plen,
MLXSW_SP_L3_PROTO_IPV6);
if (IS_ERR(fib_node))
return PTR_ERR(fib_node);
if (WARN_ON_ONCE(!fib_node->fib_entry)) {
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return -EINVAL;
}
fib6_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib6_entry, common);
err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt_arr,
nrt6);
if (err)
goto err_fib6_entry_nexthop_add;
return 0;
err_fib6_entry_nexthop_add:
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
return err;
}
static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp,
struct fib6_info **rt_arr,
unsigned int nrt6)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
struct mlxsw_sp_fib_node *fib_node;
struct fib6_info *rt = rt_arr[0];
if (mlxsw_sp_fib6_rt_should_ignore(rt))
return;
/* Multipath routes are first added to the FIB trie and only then
* notified. If we vetoed the addition, we will get a delete
* notification for a route we do not have. Therefore, do not warn if
* route was not found.
*/
fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt);
if (!fib6_entry)
return;
/* If not all the nexthops are deleted, then only reduce the nexthop
* group.
*/
if (nrt6 != fib6_entry->nrt6) {
mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr,
nrt6);
return;
}
fib_node = fib6_entry->common.fib_node;
mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib6_entry->common);
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
}
static struct mlxsw_sp_mr_table *
mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family)
{
if (family == RTNL_FAMILY_IPMR)
return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4];
else
return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6];
}
static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp,
struct mfc_entry_notifier_info *men_info,
bool replace)
{
struct mlxsw_sp_mr_table *mrt;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL);
if (IS_ERR(vr))
return PTR_ERR(vr);
mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family);
return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace);
}
static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp,
struct mfc_entry_notifier_info *men_info)
{
struct mlxsw_sp_mr_table *mrt;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id);
if (WARN_ON(!vr))
return;
mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family);
mlxsw_sp_mr_route_del(mrt, men_info->mfc);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
static int
mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp,
struct vif_entry_notifier_info *ven_info)
{
struct mlxsw_sp_mr_table *mrt;
struct mlxsw_sp_rif *rif;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL);
if (IS_ERR(vr))
return PTR_ERR(vr);
mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev);
return mlxsw_sp_mr_vif_add(mrt, ven_info->dev,
ven_info->vif_index,
ven_info->vif_flags, rif);
}
static void
mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp,
struct vif_entry_notifier_info *ven_info)
{
struct mlxsw_sp_mr_table *mrt;
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id);
if (WARN_ON(!vr))
return;
mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family);
mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_fib4_entry *fib4_entry;
fib4_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib4_entry, common);
mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
}
static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_fib6_entry *fib6_entry;
fib6_entry = container_of(fib_node->fib_entry,
struct mlxsw_sp_fib6_entry, common);
mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry);
mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry);
mlxsw_sp_fib_node_put(mlxsw_sp, fib_node);
}
static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
switch (fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node);
break;
case MLXSW_SP_L3_PROTO_IPV6:
mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node);
break;
}
}
static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto);
struct mlxsw_sp_fib_node *fib_node, *tmp;
list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) {
bool do_break = &tmp->list == &fib->node_list;
mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node);
if (do_break)
break;
}
}
static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp)
{
int i, j;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_is_used(vr))
continue;
for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++)
mlxsw_sp_mr_table_flush(vr->mr_table[j]);
mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4);
/* If virtual router was only used for IPv4, then it's no
* longer used.
*/
if (!mlxsw_sp_vr_is_used(vr))
continue;
mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6);
}
}
struct mlxsw_sp_fib6_event_work {
struct fib6_info **rt_arr;
unsigned int nrt6;
};
struct mlxsw_sp_fib_event_work {
struct work_struct work;
union {
struct mlxsw_sp_fib6_event_work fib6_work;
struct fib_entry_notifier_info fen_info;
struct fib_rule_notifier_info fr_info;
struct fib_nh_notifier_info fnh_info;
struct mfc_entry_notifier_info men_info;
struct vif_entry_notifier_info ven_info;
};
struct mlxsw_sp *mlxsw_sp;
unsigned long event;
};
static int
mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work,
struct fib6_entry_notifier_info *fen6_info)
{
struct fib6_info *rt = fen6_info->rt;
struct fib6_info **rt_arr;
struct fib6_info *iter;
unsigned int nrt6;
int i = 0;
nrt6 = fen6_info->nsiblings + 1;
rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC);
if (!rt_arr)
return -ENOMEM;
fib6_work->rt_arr = rt_arr;
fib6_work->nrt6 = nrt6;
rt_arr[0] = rt;
fib6_info_hold(rt);
if (!fen6_info->nsiblings)
return 0;
list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) {
if (i == fen6_info->nsiblings)
break;
rt_arr[i + 1] = iter;
fib6_info_hold(iter);
i++;
}
WARN_ON_ONCE(i != fen6_info->nsiblings);
return 0;
}
static void
mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work)
{
int i;
for (i = 0; i < fib6_work->nrt6; i++)
mlxsw_sp_rt6_release(fib6_work->rt_arr[i]);
kfree(fib6_work->rt_arr);
}
static void mlxsw_sp_router_fib4_event_work(struct work_struct *work)
{
struct mlxsw_sp_fib_event_work *fib_work =
container_of(work, struct mlxsw_sp_fib_event_work, work);
struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
int err;
mutex_lock(&mlxsw_sp->router->lock);
mlxsw_sp_span_respin(mlxsw_sp);
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
err = mlxsw_sp_router_fib4_replace(mlxsw_sp,
&fib_work->fen_info);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "FIB replace failed.\n");
mlxsw_sp_fib4_offload_failed_flag_set(mlxsw_sp,
&fib_work->fen_info);
}
fib_info_put(fib_work->fen_info.fi);
break;
case FIB_EVENT_ENTRY_DEL:
mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info);
fib_info_put(fib_work->fen_info.fi);
break;
case FIB_EVENT_NH_ADD:
case FIB_EVENT_NH_DEL:
mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event,
fib_work->fnh_info.fib_nh);
fib_info_put(fib_work->fnh_info.fib_nh->nh_parent);
break;
}
mutex_unlock(&mlxsw_sp->router->lock);
kfree(fib_work);
}
static void mlxsw_sp_router_fib6_event_work(struct work_struct *work)
{
struct mlxsw_sp_fib_event_work *fib_work =
container_of(work, struct mlxsw_sp_fib_event_work, work);
struct mlxsw_sp_fib6_event_work *fib6_work = &fib_work->fib6_work;
struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
int err;
mutex_lock(&mlxsw_sp->router->lock);
mlxsw_sp_span_respin(mlxsw_sp);
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
err = mlxsw_sp_router_fib6_replace(mlxsw_sp,
fib6_work->rt_arr,
fib6_work->nrt6);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "FIB replace failed.\n");
mlxsw_sp_fib6_offload_failed_flag_set(mlxsw_sp,
fib6_work->rt_arr,
fib6_work->nrt6);
}
mlxsw_sp_router_fib6_work_fini(fib6_work);
break;
case FIB_EVENT_ENTRY_APPEND:
err = mlxsw_sp_router_fib6_append(mlxsw_sp,
fib6_work->rt_arr,
fib6_work->nrt6);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "FIB append failed.\n");
mlxsw_sp_fib6_offload_failed_flag_set(mlxsw_sp,
fib6_work->rt_arr,
fib6_work->nrt6);
}
mlxsw_sp_router_fib6_work_fini(fib6_work);
break;
case FIB_EVENT_ENTRY_DEL:
mlxsw_sp_router_fib6_del(mlxsw_sp,
fib6_work->rt_arr,
fib6_work->nrt6);
mlxsw_sp_router_fib6_work_fini(fib6_work);
break;
}
mutex_unlock(&mlxsw_sp->router->lock);
kfree(fib_work);
}
static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work)
{
struct mlxsw_sp_fib_event_work *fib_work =
container_of(work, struct mlxsw_sp_fib_event_work, work);
struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
bool replace;
int err;
rtnl_lock();
mutex_lock(&mlxsw_sp->router->lock);
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_ADD:
replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE;
err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info,
replace);
if (err)
dev_warn(mlxsw_sp->bus_info->dev, "MR entry add failed.\n");
mr_cache_put(fib_work->men_info.mfc);
break;
case FIB_EVENT_ENTRY_DEL:
mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info);
mr_cache_put(fib_work->men_info.mfc);
break;
case FIB_EVENT_VIF_ADD:
err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp,
&fib_work->ven_info);
if (err)
dev_warn(mlxsw_sp->bus_info->dev, "MR VIF add failed.\n");
dev_put(fib_work->ven_info.dev);
break;
case FIB_EVENT_VIF_DEL:
mlxsw_sp_router_fibmr_vif_del(mlxsw_sp,
&fib_work->ven_info);
dev_put(fib_work->ven_info.dev);
break;
}
mutex_unlock(&mlxsw_sp->router->lock);
rtnl_unlock();
kfree(fib_work);
}
static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work,
struct fib_notifier_info *info)
{
struct fib_entry_notifier_info *fen_info;
struct fib_nh_notifier_info *fnh_info;
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_DEL:
fen_info = container_of(info, struct fib_entry_notifier_info,
info);
fib_work->fen_info = *fen_info;
/* Take reference on fib_info to prevent it from being
* freed while work is queued. Release it afterwards.
*/
fib_info_hold(fib_work->fen_info.fi);
break;
case FIB_EVENT_NH_ADD:
case FIB_EVENT_NH_DEL:
fnh_info = container_of(info, struct fib_nh_notifier_info,
info);
fib_work->fnh_info = *fnh_info;
fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent);
break;
}
}
static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work,
struct fib_notifier_info *info)
{
struct fib6_entry_notifier_info *fen6_info;
int err;
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_APPEND:
case FIB_EVENT_ENTRY_DEL:
fen6_info = container_of(info, struct fib6_entry_notifier_info,
info);
err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work,
fen6_info);
if (err)
return err;
break;
}
return 0;
}
static void
mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work,
struct fib_notifier_info *info)
{
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_ADD:
case FIB_EVENT_ENTRY_DEL:
memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info));
mr_cache_hold(fib_work->men_info.mfc);
break;
case FIB_EVENT_VIF_ADD:
case FIB_EVENT_VIF_DEL:
memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info));
dev_hold(fib_work->ven_info.dev);
break;
}
}
static int mlxsw_sp_router_fib_rule_event(unsigned long event,
struct fib_notifier_info *info,
struct mlxsw_sp *mlxsw_sp)
{
struct netlink_ext_ack *extack = info->extack;
struct fib_rule_notifier_info *fr_info;
struct fib_rule *rule;
int err = 0;
/* nothing to do at the moment */
if (event == FIB_EVENT_RULE_DEL)
return 0;
fr_info = container_of(info, struct fib_rule_notifier_info, info);
rule = fr_info->rule;
/* Rule only affects locally generated traffic */
if (rule->iifindex == mlxsw_sp_net(mlxsw_sp)->loopback_dev->ifindex)
return 0;
switch (info->family) {
case AF_INET:
if (!fib4_rule_default(rule) && !rule->l3mdev)
err = -EOPNOTSUPP;
break;
case AF_INET6:
if (!fib6_rule_default(rule) && !rule->l3mdev)
err = -EOPNOTSUPP;
break;
case RTNL_FAMILY_IPMR:
if (!ipmr_rule_default(rule) && !rule->l3mdev)
err = -EOPNOTSUPP;
break;
case RTNL_FAMILY_IP6MR:
if (!ip6mr_rule_default(rule) && !rule->l3mdev)
err = -EOPNOTSUPP;
break;
}
if (err < 0)
NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported");
return err;
}
/* Called with rcu_read_lock() */
static int mlxsw_sp_router_fib_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct mlxsw_sp_fib_event_work *fib_work;
struct fib_notifier_info *info = ptr;
struct mlxsw_sp_router *router;
int err;
if ((info->family != AF_INET && info->family != AF_INET6 &&
info->family != RTNL_FAMILY_IPMR &&
info->family != RTNL_FAMILY_IP6MR))
return NOTIFY_DONE;
router = container_of(nb, struct mlxsw_sp_router, fib_nb);
switch (event) {
case FIB_EVENT_RULE_ADD:
case FIB_EVENT_RULE_DEL:
err = mlxsw_sp_router_fib_rule_event(event, info,
router->mlxsw_sp);
return notifier_from_errno(err);
case FIB_EVENT_ENTRY_ADD:
case FIB_EVENT_ENTRY_REPLACE:
case FIB_EVENT_ENTRY_APPEND:
if (info->family == AF_INET) {
struct fib_entry_notifier_info *fen_info = ptr;
if (fen_info->fi->fib_nh_is_v6) {
NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
return notifier_from_errno(-EINVAL);
}
}
break;
}
fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
if (!fib_work)
return NOTIFY_BAD;
fib_work->mlxsw_sp = router->mlxsw_sp;
fib_work->event = event;
switch (info->family) {
case AF_INET:
INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work);
mlxsw_sp_router_fib4_event(fib_work, info);
break;
case AF_INET6:
INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work);
err = mlxsw_sp_router_fib6_event(fib_work, info);
if (err)
goto err_fib_event;
break;
case RTNL_FAMILY_IP6MR:
case RTNL_FAMILY_IPMR:
INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work);
mlxsw_sp_router_fibmr_event(fib_work, info);
break;
}
mlxsw_core_schedule_work(&fib_work->work);
return NOTIFY_DONE;
err_fib_event:
kfree(fib_work);
return NOTIFY_BAD;
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++)
if (mlxsw_sp->router->rifs[i] &&
mlxsw_sp->router->rifs[i]->dev == dev)
return mlxsw_sp->router->rifs[i];
return NULL;
}
bool mlxsw_sp_rif_exists(struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
struct mlxsw_sp_rif *rif;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
mutex_unlock(&mlxsw_sp->router->lock);
return rif;
}
u16 mlxsw_sp_rif_vid(struct mlxsw_sp *mlxsw_sp, const struct net_device *dev)
{
struct mlxsw_sp_rif *rif;
u16 vid = 0;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
goto out;
/* We only return the VID for VLAN RIFs. Otherwise we return an
* invalid value (0).
*/
if (rif->ops->type != MLXSW_SP_RIF_TYPE_VLAN)
goto out;
vid = mlxsw_sp_fid_8021q_vid(rif->fid);
out:
mutex_unlock(&mlxsw_sp->router->lock);
return vid;
}
static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
int err;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_enable_set(ritr_pl, false);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index);
mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif);
mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif);
}
static bool
mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev,
unsigned long event)
{
struct inet6_dev *inet6_dev;
bool addr_list_empty = true;
struct in_device *idev;
switch (event) {
case NETDEV_UP:
return rif == NULL;
case NETDEV_DOWN:
rcu_read_lock();
idev = __in_dev_get_rcu(dev);
if (idev && idev->ifa_list)
addr_list_empty = false;
inet6_dev = __in6_dev_get(dev);
if (addr_list_empty && inet6_dev &&
!list_empty(&inet6_dev->addr_list))
addr_list_empty = false;
rcu_read_unlock();
/* macvlans do not have a RIF, but rather piggy back on the
* RIF of their lower device.
*/
if (netif_is_macvlan(dev) && addr_list_empty)
return true;
if (rif && addr_list_empty &&
!netif_is_l3_slave(rif->dev))
return true;
/* It is possible we already removed the RIF ourselves
* if it was assigned to a netdev that is now a bridge
* or LAG slave.
*/
return false;
}
return false;
}
static enum mlxsw_sp_rif_type
mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
enum mlxsw_sp_fid_type type;
if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL))
return MLXSW_SP_RIF_TYPE_IPIP_LB;
/* Otherwise RIF type is derived from the type of the underlying FID. */
if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev)))
type = MLXSW_SP_FID_TYPE_8021Q;
else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev))
type = MLXSW_SP_FID_TYPE_8021Q;
else if (netif_is_bridge_master(dev))
type = MLXSW_SP_FID_TYPE_8021D;
else
type = MLXSW_SP_FID_TYPE_RFID;
return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type);
}
static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index,
u8 rif_entries)
{
*p_rif_index = gen_pool_alloc(mlxsw_sp->router->rifs_table,
rif_entries);
if (*p_rif_index == 0)
return -ENOBUFS;
*p_rif_index -= MLXSW_SP_ROUTER_GENALLOC_OFFSET;
/* RIF indexes must be aligned to the allocation size. */
WARN_ON_ONCE(*p_rif_index % rif_entries);
return 0;
}
static void mlxsw_sp_rif_index_free(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
u8 rif_entries)
{
gen_pool_free(mlxsw_sp->router->rifs_table,
MLXSW_SP_ROUTER_GENALLOC_OFFSET + rif_index, rif_entries);
}
static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index,
u16 vr_id,
struct net_device *l3_dev)
{
struct mlxsw_sp_rif *rif;
rif = kzalloc(rif_size, GFP_KERNEL);
if (!rif)
return NULL;
INIT_LIST_HEAD(&rif->nexthop_list);
INIT_LIST_HEAD(&rif->neigh_list);
if (l3_dev) {
ether_addr_copy(rif->addr, l3_dev->dev_addr);
rif->mtu = l3_dev->mtu;
rif->dev = l3_dev;
}
rif->vr_id = vr_id;
rif->rif_index = rif_index;
return rif;
}
struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp,
u16 rif_index)
{
return mlxsw_sp->router->rifs[rif_index];
}
u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif)
{
return rif->rif_index;
}
u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif)
{
return lb_rif->common.rif_index;
}
u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif)
{
u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev);
struct mlxsw_sp_vr *ul_vr;
ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL);
if (WARN_ON(IS_ERR(ul_vr)))
return 0;
return ul_vr->id;
}
u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif)
{
return lb_rif->ul_rif_id;
}
static bool
mlxsw_sp_router_port_l3_stats_enabled(struct mlxsw_sp_rif *rif)
{
return mlxsw_sp_rif_counter_valid_get(rif,
MLXSW_SP_RIF_COUNTER_EGRESS) &&
mlxsw_sp_rif_counter_valid_get(rif,
MLXSW_SP_RIF_COUNTER_INGRESS);
}
static int
mlxsw_sp_router_port_l3_stats_enable(struct mlxsw_sp_rif *rif)
{
int err;
err = mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_INGRESS);
if (err)
return err;
/* Clear stale data. */
err = mlxsw_sp_rif_counter_fetch_clear(rif,
MLXSW_SP_RIF_COUNTER_INGRESS,
NULL);
if (err)
goto err_clear_ingress;
err = mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_EGRESS);
if (err)
goto err_alloc_egress;
/* Clear stale data. */
err = mlxsw_sp_rif_counter_fetch_clear(rif,
MLXSW_SP_RIF_COUNTER_EGRESS,
NULL);
if (err)
goto err_clear_egress;
return 0;
err_clear_egress:
mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS);
err_alloc_egress:
err_clear_ingress:
mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_INGRESS);
return err;
}
static void
mlxsw_sp_router_port_l3_stats_disable(struct mlxsw_sp_rif *rif)
{
mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS);
mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_INGRESS);
}
static void
mlxsw_sp_router_port_l3_stats_report_used(struct mlxsw_sp_rif *rif,
struct netdev_notifier_offload_xstats_info *info)
{
if (!mlxsw_sp_router_port_l3_stats_enabled(rif))
return;
netdev_offload_xstats_report_used(info->report_used);
}
static int
mlxsw_sp_router_port_l3_stats_fetch(struct mlxsw_sp_rif *rif,
struct rtnl_hw_stats64 *p_stats)
{
struct mlxsw_sp_rif_counter_set_basic ingress;
struct mlxsw_sp_rif_counter_set_basic egress;
int err;
err = mlxsw_sp_rif_counter_fetch_clear(rif,
MLXSW_SP_RIF_COUNTER_INGRESS,
&ingress);
if (err)
return err;
err = mlxsw_sp_rif_counter_fetch_clear(rif,
MLXSW_SP_RIF_COUNTER_EGRESS,
&egress);
if (err)
return err;
#define MLXSW_SP_ROUTER_ALL_GOOD(SET, SFX) \
((SET.good_unicast_ ## SFX) + \
(SET.good_multicast_ ## SFX) + \
(SET.good_broadcast_ ## SFX))
p_stats->rx_packets = MLXSW_SP_ROUTER_ALL_GOOD(ingress, packets);
p_stats->tx_packets = MLXSW_SP_ROUTER_ALL_GOOD(egress, packets);
p_stats->rx_bytes = MLXSW_SP_ROUTER_ALL_GOOD(ingress, bytes);
p_stats->tx_bytes = MLXSW_SP_ROUTER_ALL_GOOD(egress, bytes);
p_stats->rx_errors = ingress.error_packets;
p_stats->tx_errors = egress.error_packets;
p_stats->rx_dropped = ingress.discard_packets;
p_stats->tx_dropped = egress.discard_packets;
p_stats->multicast = ingress.good_multicast_packets +
ingress.good_broadcast_packets;
#undef MLXSW_SP_ROUTER_ALL_GOOD
return 0;
}
static int
mlxsw_sp_router_port_l3_stats_report_delta(struct mlxsw_sp_rif *rif,
struct netdev_notifier_offload_xstats_info *info)
{
struct rtnl_hw_stats64 stats = {};
int err;
if (!mlxsw_sp_router_port_l3_stats_enabled(rif))
return 0;
err = mlxsw_sp_router_port_l3_stats_fetch(rif, &stats);
if (err)
return err;
netdev_offload_xstats_report_delta(info->report_delta, &stats);
return 0;
}
struct mlxsw_sp_router_hwstats_notify_work {
struct work_struct work;
struct net_device *dev;
};
static void mlxsw_sp_router_hwstats_notify_work(struct work_struct *work)
{
struct mlxsw_sp_router_hwstats_notify_work *hws_work =
container_of(work, struct mlxsw_sp_router_hwstats_notify_work,
work);
rtnl_lock();
rtnl_offload_xstats_notify(hws_work->dev);
rtnl_unlock();
dev_put(hws_work->dev);
kfree(hws_work);
}
static void
mlxsw_sp_router_hwstats_notify_schedule(struct net_device *dev)
{
struct mlxsw_sp_router_hwstats_notify_work *hws_work;
/* To collect notification payload, the core ends up sending another
* notifier block message, which would deadlock on the attempt to
* acquire the router lock again. Just postpone the notification until
* later.
*/
hws_work = kzalloc(sizeof(*hws_work), GFP_KERNEL);
if (!hws_work)
return;
INIT_WORK(&hws_work->work, mlxsw_sp_router_hwstats_notify_work);
dev_hold(dev);
hws_work->dev = dev;
mlxsw_core_schedule_work(&hws_work->work);
}
int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif)
{
return rif->dev->ifindex;
}
const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif)
{
return rif->dev;
}
static void mlxsw_sp_rif_push_l3_stats(struct mlxsw_sp_rif *rif)
{
struct rtnl_hw_stats64 stats = {};
if (!mlxsw_sp_router_port_l3_stats_fetch(rif, &stats))
netdev_offload_xstats_push_delta(rif->dev,
NETDEV_OFFLOAD_XSTATS_TYPE_L3,
&stats);
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif_params *params,
struct netlink_ext_ack *extack)
{
u8 rif_entries = params->double_entry ? 2 : 1;
u32 tb_id = l3mdev_fib_table(params->dev);
const struct mlxsw_sp_rif_ops *ops;
struct mlxsw_sp_fid *fid = NULL;
enum mlxsw_sp_rif_type type;
struct mlxsw_sp_rif *rif;
struct mlxsw_sp_vr *vr;
u16 rif_index;
int i, err;
type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev);
ops = mlxsw_sp->router->rif_ops_arr[type];
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack);
if (IS_ERR(vr))
return ERR_CAST(vr);
vr->rif_count++;
err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index, rif_entries);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces");
goto err_rif_index_alloc;
}
rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev);
if (!rif) {
err = -ENOMEM;
goto err_rif_alloc;
}
dev_hold(rif->dev);
mlxsw_sp->router->rifs[rif_index] = rif;
rif->mlxsw_sp = mlxsw_sp;
rif->ops = ops;
rif->rif_entries = rif_entries;
if (ops->fid_get) {
fid = ops->fid_get(rif, extack);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
goto err_fid_get;
}
rif->fid = fid;
}
if (ops->setup)
ops->setup(rif, params);
err = ops->configure(rif, extack);
if (err)
goto err_configure;
for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) {
err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif);
if (err)
goto err_mr_rif_add;
}
if (netdev_offload_xstats_enabled(rif->dev,
NETDEV_OFFLOAD_XSTATS_TYPE_L3)) {
err = mlxsw_sp_router_port_l3_stats_enable(rif);
if (err)
goto err_stats_enable;
mlxsw_sp_router_hwstats_notify_schedule(rif->dev);
} else {
mlxsw_sp_rif_counters_alloc(rif);
}
atomic_add(rif_entries, &mlxsw_sp->router->rifs_count);
return rif;
err_stats_enable:
err_mr_rif_add:
for (i--; i >= 0; i--)
mlxsw_sp_mr_rif_del(vr->mr_table[i], rif);
ops->deconfigure(rif);
err_configure:
if (fid)
mlxsw_sp_fid_put(fid);
err_fid_get:
mlxsw_sp->router->rifs[rif_index] = NULL;
dev_put(rif->dev);
kfree(rif);
err_rif_alloc:
mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
err_rif_index_alloc:
vr->rif_count--;
mlxsw_sp_vr_put(mlxsw_sp, vr);
return ERR_PTR(err);
}
static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif)
{
const struct mlxsw_sp_rif_ops *ops = rif->ops;
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_fid *fid = rif->fid;
u8 rif_entries = rif->rif_entries;
u16 rif_index = rif->rif_index;
struct mlxsw_sp_vr *vr;
int i;
atomic_sub(rif_entries, &mlxsw_sp->router->rifs_count);
mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif);
vr = &mlxsw_sp->router->vrs[rif->vr_id];
if (netdev_offload_xstats_enabled(rif->dev,
NETDEV_OFFLOAD_XSTATS_TYPE_L3)) {
mlxsw_sp_rif_push_l3_stats(rif);
mlxsw_sp_router_port_l3_stats_disable(rif);
mlxsw_sp_router_hwstats_notify_schedule(rif->dev);
} else {
mlxsw_sp_rif_counters_free(rif);
}
for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++)
mlxsw_sp_mr_rif_del(vr->mr_table[i], rif);
ops->deconfigure(rif);
if (fid)
/* Loopback RIFs are not associated with a FID. */
mlxsw_sp_fid_put(fid);
mlxsw_sp->router->rifs[rif->rif_index] = NULL;
dev_put(rif->dev);
kfree(rif);
mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
vr->rif_count--;
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev)
{
struct mlxsw_sp_rif *rif;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
goto out;
mlxsw_sp_rif_destroy(rif);
out:
mutex_unlock(&mlxsw_sp->router->lock);
}
static void
mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params,
struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
params->vid = mlxsw_sp_port_vlan->vid;
params->lag = mlxsw_sp_port->lagged;
if (params->lag)
params->lag_id = mlxsw_sp_port->lag_id;
else
params->system_port = mlxsw_sp_port->local_port;
}
static struct mlxsw_sp_rif_subport *
mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif)
{
return container_of(rif, struct mlxsw_sp_rif_subport, common);
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif_params *params,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_subport *rif_subport;
struct mlxsw_sp_rif *rif;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev);
if (!rif)
return mlxsw_sp_rif_create(mlxsw_sp, params, extack);
rif_subport = mlxsw_sp_rif_subport_rif(rif);
refcount_inc(&rif_subport->ref_count);
return rif;
}
static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_rif_subport *rif_subport;
rif_subport = mlxsw_sp_rif_subport_rif(rif);
if (!refcount_dec_and_test(&rif_subport->ref_count))
return;
mlxsw_sp_rif_destroy(rif);
}
static int mlxsw_sp_rif_mac_profile_index_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif_mac_profile *profile,
struct netlink_ext_ack *extack)
{
u8 max_rif_mac_profiles = mlxsw_sp->router->max_rif_mac_profile;
struct mlxsw_sp_router *router = mlxsw_sp->router;
int id;
id = idr_alloc(&router->rif_mac_profiles_idr, profile, 0,
max_rif_mac_profiles, GFP_KERNEL);
if (id >= 0) {
profile->id = id;
return 0;
}
if (id == -ENOSPC)
NL_SET_ERR_MSG_MOD(extack,
"Exceeded number of supported router interface MAC profiles");
return id;
}
static struct mlxsw_sp_rif_mac_profile *
mlxsw_sp_rif_mac_profile_index_free(struct mlxsw_sp *mlxsw_sp, u8 mac_profile)
{
struct mlxsw_sp_rif_mac_profile *profile;
profile = idr_remove(&mlxsw_sp->router->rif_mac_profiles_idr,
mac_profile);
WARN_ON(!profile);
return profile;
}
static struct mlxsw_sp_rif_mac_profile *
mlxsw_sp_rif_mac_profile_alloc(const char *mac)
{
struct mlxsw_sp_rif_mac_profile *profile;
profile = kzalloc(sizeof(*profile), GFP_KERNEL);
if (!profile)
return NULL;
ether_addr_copy(profile->mac_prefix, mac);
refcount_set(&profile->ref_count, 1);
return profile;
}
static struct mlxsw_sp_rif_mac_profile *
mlxsw_sp_rif_mac_profile_find(const struct mlxsw_sp *mlxsw_sp, const char *mac)
{
struct mlxsw_sp_router *router = mlxsw_sp->router;
struct mlxsw_sp_rif_mac_profile *profile;
int id;
idr_for_each_entry(&router->rif_mac_profiles_idr, profile, id) {
if (ether_addr_equal_masked(profile->mac_prefix, mac,
mlxsw_sp->mac_mask))
return profile;
}
return NULL;
}
static u64 mlxsw_sp_rif_mac_profiles_occ_get(void *priv)
{
const struct mlxsw_sp *mlxsw_sp = priv;
return atomic_read(&mlxsw_sp->router->rif_mac_profiles_count);
}
static u64 mlxsw_sp_rifs_occ_get(void *priv)
{
const struct mlxsw_sp *mlxsw_sp = priv;
return atomic_read(&mlxsw_sp->router->rifs_count);
}
static struct mlxsw_sp_rif_mac_profile *
mlxsw_sp_rif_mac_profile_create(struct mlxsw_sp *mlxsw_sp, const char *mac,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_mac_profile *profile;
int err;
profile = mlxsw_sp_rif_mac_profile_alloc(mac);
if (!profile)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_rif_mac_profile_index_alloc(mlxsw_sp, profile, extack);
if (err)
goto profile_index_alloc_err;
atomic_inc(&mlxsw_sp->router->rif_mac_profiles_count);
return profile;
profile_index_alloc_err:
kfree(profile);
return ERR_PTR(err);
}
static void mlxsw_sp_rif_mac_profile_destroy(struct mlxsw_sp *mlxsw_sp,
u8 mac_profile)
{
struct mlxsw_sp_rif_mac_profile *profile;
atomic_dec(&mlxsw_sp->router->rif_mac_profiles_count);
profile = mlxsw_sp_rif_mac_profile_index_free(mlxsw_sp, mac_profile);
kfree(profile);
}
static int mlxsw_sp_rif_mac_profile_get(struct mlxsw_sp *mlxsw_sp,
const char *mac, u8 *p_mac_profile,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_mac_profile *profile;
profile = mlxsw_sp_rif_mac_profile_find(mlxsw_sp, mac);
if (profile) {
refcount_inc(&profile->ref_count);
goto out;
}
profile = mlxsw_sp_rif_mac_profile_create(mlxsw_sp, mac, extack);
if (IS_ERR(profile))
return PTR_ERR(profile);
out:
*p_mac_profile = profile->id;
return 0;
}
static void mlxsw_sp_rif_mac_profile_put(struct mlxsw_sp *mlxsw_sp,
u8 mac_profile)
{
struct mlxsw_sp_rif_mac_profile *profile;
profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr,
mac_profile);
if (WARN_ON(!profile))
return;
if (!refcount_dec_and_test(&profile->ref_count))
return;
mlxsw_sp_rif_mac_profile_destroy(mlxsw_sp, mac_profile);
}
static bool mlxsw_sp_rif_mac_profile_is_shared(const struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif_mac_profile *profile;
profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr,
rif->mac_profile_id);
if (WARN_ON(!profile))
return false;
return refcount_read(&profile->ref_count) > 1;
}
static int mlxsw_sp_rif_mac_profile_edit(struct mlxsw_sp_rif *rif,
const char *new_mac)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif_mac_profile *profile;
profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr,
rif->mac_profile_id);
if (WARN_ON(!profile))
return -EINVAL;
ether_addr_copy(profile->mac_prefix, new_mac);
return 0;
}
static int
mlxsw_sp_rif_mac_profile_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
const char *new_mac,
struct netlink_ext_ack *extack)
{
u8 mac_profile;
int err;
if (!mlxsw_sp_rif_mac_profile_is_shared(rif) &&
!mlxsw_sp_rif_mac_profile_find(mlxsw_sp, new_mac))
return mlxsw_sp_rif_mac_profile_edit(rif, new_mac);
err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, new_mac,
&mac_profile, extack);
if (err)
return err;
mlxsw_sp_rif_mac_profile_put(mlxsw_sp, rif->mac_profile_id);
rif->mac_profile_id = mac_profile;
return 0;
}
static int
__mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
struct net_device *l3_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_rif_params params = {
.dev = l3_dev,
};
u16 vid = mlxsw_sp_port_vlan->vid;
struct mlxsw_sp_rif *rif;
struct mlxsw_sp_fid *fid;
int err;
mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan);
rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack);
if (IS_ERR(rif))
return PTR_ERR(rif);
/* FID was already created, just take a reference */
fid = rif->ops->fid_get(rif, extack);
err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid);
if (err)
goto err_fid_port_vid_map;
err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false);
if (err)
goto err_port_vid_learning_set;
err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid,
BR_STATE_FORWARDING);
if (err)
goto err_port_vid_stp_set;
mlxsw_sp_port_vlan->fid = fid;
return 0;
err_port_vid_stp_set:
mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true);
err_port_vid_learning_set:
mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid);
err_fid_port_vid_map:
mlxsw_sp_fid_put(fid);
mlxsw_sp_rif_subport_put(rif);
return err;
}
static void
__mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid;
struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid);
u16 vid = mlxsw_sp_port_vlan->vid;
if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID))
return;
mlxsw_sp_port_vlan->fid = NULL;
mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING);
mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true);
mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid);
mlxsw_sp_fid_put(fid);
mlxsw_sp_rif_subport_put(rif);
}
int
mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
struct net_device *l3_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp;
struct mlxsw_sp_rif *rif;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (!rif)
goto out;
err = __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, l3_dev,
extack);
out:
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
void
mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp;
mutex_lock(&mlxsw_sp->router->lock);
__mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan);
mutex_unlock(&mlxsw_sp->router->lock);
}
static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev,
struct net_device *port_dev,
unsigned long event, u16 vid,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev);
struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan;
mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid);
if (WARN_ON(!mlxsw_sp_port_vlan))
return -EINVAL;
switch (event) {
case NETDEV_UP:
return __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan,
l3_dev, extack);
case NETDEV_DOWN:
__mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan);
break;
}
return 0;
}
static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
if (netif_is_any_bridge_port(port_dev) || netif_is_lag_port(port_dev))
return 0;
return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event,
MLXSW_SP_DEFAULT_VID, extack);
}
static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev,
struct net_device *lag_dev,
unsigned long event, u16 vid,
struct netlink_ext_ack *extack)
{
struct net_device *port_dev;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(lag_dev, port_dev, iter) {
if (mlxsw_sp_port_dev_check(port_dev)) {
err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev,
port_dev,
event, vid,
extack);
if (err)
return err;
}
}
return 0;
}
static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
if (netif_is_bridge_port(lag_dev))
return 0;
return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event,
MLXSW_SP_DEFAULT_VID, extack);
}
static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *l3_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_params params = {
.dev = l3_dev,
};
struct mlxsw_sp_rif *rif;
switch (event) {
case NETDEV_UP:
if (netif_is_bridge_master(l3_dev) && br_vlan_enabled(l3_dev)) {
u16 proto;
br_vlan_get_proto(l3_dev, &proto);
if (proto == ETH_P_8021AD) {
NL_SET_ERR_MSG_MOD(extack, "Adding an IP address to 802.1ad bridge is not supported");
return -EOPNOTSUPP;
}
}
rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack);
if (IS_ERR(rif))
return PTR_ERR(rif);
break;
case NETDEV_DOWN:
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
mlxsw_sp_rif_destroy(rif);
break;
}
return 0;
}
static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *vlan_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
struct net_device *real_dev = vlan_dev_real_dev(vlan_dev);
u16 vid = vlan_dev_vlan_id(vlan_dev);
if (netif_is_bridge_port(vlan_dev))
return 0;
if (mlxsw_sp_port_dev_check(real_dev))
return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev,
event, vid, extack);
else if (netif_is_lag_master(real_dev))
return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event,
vid, extack);
else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev))
return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event,
extack);
return 0;
}
static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac)
{
u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 };
u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
return ether_addr_equal_masked(mac, vrrp4, mask);
}
static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac)
{
u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 };
u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
return ether_addr_equal_masked(mac, vrrp6, mask);
}
static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
const u8 *mac, bool adding)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
u8 vrrp_id = adding ? mac[5] : 0;
int err;
if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) &&
!mlxsw_sp_rif_macvlan_is_vrrp6(mac))
return 0;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
if (mlxsw_sp_rif_macvlan_is_vrrp4(mac))
mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id);
else
mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp,
const struct net_device *macvlan_dev,
struct netlink_ext_ack *extack)
{
struct macvlan_dev *vlan = netdev_priv(macvlan_dev);
struct mlxsw_sp_rif *rif;
int err;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev);
if (!rif) {
NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces");
return -EOPNOTSUPP;
}
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), true);
if (err)
return err;
err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index,
macvlan_dev->dev_addr, true);
if (err)
goto err_rif_vrrp_add;
/* Make sure the bridge driver does not have this MAC pointing at
* some other port.
*/
if (rif->ops->fdb_del)
rif->ops->fdb_del(rif, macvlan_dev->dev_addr);
return 0;
err_rif_vrrp_add:
mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
return err;
}
static void __mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp,
const struct net_device *macvlan_dev)
{
struct macvlan_dev *vlan = netdev_priv(macvlan_dev);
struct mlxsw_sp_rif *rif;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev);
/* If we do not have a RIF, then we already took care of
* removing the macvlan's MAC during RIF deletion.
*/
if (!rif)
return;
mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr,
false);
mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
}
void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp,
const struct net_device *macvlan_dev)
{
mutex_lock(&mlxsw_sp->router->lock);
__mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev);
mutex_unlock(&mlxsw_sp->router->lock);
}
static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *macvlan_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
switch (event) {
case NETDEV_UP:
return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack);
case NETDEV_DOWN:
__mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev);
break;
}
return 0;
}
static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
if (mlxsw_sp_port_dev_check(dev))
return mlxsw_sp_inetaddr_port_event(dev, event, extack);
else if (netif_is_lag_master(dev))
return mlxsw_sp_inetaddr_lag_event(dev, event, extack);
else if (netif_is_bridge_master(dev))
return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event,
extack);
else if (is_vlan_dev(dev))
return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event,
extack);
else if (netif_is_macvlan(dev))
return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event,
extack);
else
return 0;
}
static int mlxsw_sp_inetaddr_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *) ptr;
struct net_device *dev = ifa->ifa_dev->dev;
struct mlxsw_sp_router *router;
struct mlxsw_sp_rif *rif;
int err = 0;
/* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */
if (event == NETDEV_UP)
return NOTIFY_DONE;
router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb);
mutex_lock(&router->lock);
rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev);
if (!mlxsw_sp_rif_should_config(rif, dev, event))
goto out;
err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL);
out:
mutex_unlock(&router->lock);
return notifier_from_errno(err);
}
int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct in_validator_info *ivi = (struct in_validator_info *) ptr;
struct net_device *dev = ivi->ivi_dev->dev;
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif *rif;
int err = 0;
mlxsw_sp = mlxsw_sp_lower_get(dev);
if (!mlxsw_sp)
return NOTIFY_DONE;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!mlxsw_sp_rif_should_config(rif, dev, event))
goto out;
err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack);
out:
mutex_unlock(&mlxsw_sp->router->lock);
return notifier_from_errno(err);
}
struct mlxsw_sp_inet6addr_event_work {
struct work_struct work;
struct mlxsw_sp *mlxsw_sp;
struct net_device *dev;
unsigned long event;
};
static void mlxsw_sp_inet6addr_event_work(struct work_struct *work)
{
struct mlxsw_sp_inet6addr_event_work *inet6addr_work =
container_of(work, struct mlxsw_sp_inet6addr_event_work, work);
struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp;
struct net_device *dev = inet6addr_work->dev;
unsigned long event = inet6addr_work->event;
struct mlxsw_sp_rif *rif;
rtnl_lock();
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!mlxsw_sp_rif_should_config(rif, dev, event))
goto out;
__mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL);
out:
mutex_unlock(&mlxsw_sp->router->lock);
rtnl_unlock();
dev_put(dev);
kfree(inet6addr_work);
}
/* Called with rcu_read_lock() */
static int mlxsw_sp_inet6addr_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr;
struct mlxsw_sp_inet6addr_event_work *inet6addr_work;
struct net_device *dev = if6->idev->dev;
struct mlxsw_sp_router *router;
/* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */
if (event == NETDEV_UP)
return NOTIFY_DONE;
inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC);
if (!inet6addr_work)
return NOTIFY_BAD;
router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb);
INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work);
inet6addr_work->mlxsw_sp = router->mlxsw_sp;
inet6addr_work->dev = dev;
inet6addr_work->event = event;
dev_hold(dev);
mlxsw_core_schedule_work(&inet6addr_work->work);
return NOTIFY_DONE;
}
int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr;
struct net_device *dev = i6vi->i6vi_dev->dev;
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif *rif;
int err = 0;
mlxsw_sp = mlxsw_sp_lower_get(dev);
if (!mlxsw_sp)
return NOTIFY_DONE;
mutex_lock(&mlxsw_sp->router->lock);
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!mlxsw_sp_rif_should_config(rif, dev, event))
goto out;
err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack);
out:
mutex_unlock(&mlxsw_sp->router->lock);
return notifier_from_errno(err);
}
static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
const char *mac, int mtu, u8 mac_profile)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
int err;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_mtu_set(ritr_pl, mtu);
mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac);
mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, mac_profile);
mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int
mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
struct net_device *dev = rif->dev;
u8 old_mac_profile;
u16 fid_index;
int err;
fid_index = mlxsw_sp_fid_index(rif->fid);
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false);
if (err)
return err;
old_mac_profile = rif->mac_profile_id;
err = mlxsw_sp_rif_mac_profile_replace(mlxsw_sp, rif, dev->dev_addr,
extack);
if (err)
goto err_rif_mac_profile_replace;
err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr,
dev->mtu, rif->mac_profile_id);
if (err)
goto err_rif_edit;
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true);
if (err)
goto err_rif_fdb_op;
if (rif->mtu != dev->mtu) {
struct mlxsw_sp_vr *vr;
int i;
/* The RIF is relevant only to its mr_table instance, as unlike
* unicast routing, in multicast routing a RIF cannot be shared
* between several multicast routing tables.
*/
vr = &mlxsw_sp->router->vrs[rif->vr_id];
for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++)
mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i],
rif, dev->mtu);
}
ether_addr_copy(rif->addr, dev->dev_addr);
rif->mtu = dev->mtu;
netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index);
return 0;
err_rif_fdb_op:
mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu,
old_mac_profile);
err_rif_edit:
mlxsw_sp_rif_mac_profile_replace(mlxsw_sp, rif, rif->addr, extack);
err_rif_mac_profile_replace:
mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true);
return err;
}
static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif,
struct netdev_notifier_pre_changeaddr_info *info)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif_mac_profile *profile;
struct netlink_ext_ack *extack;
u8 max_rif_mac_profiles;
u64 occ;
extack = netdev_notifier_info_to_extack(&info->info);
profile = mlxsw_sp_rif_mac_profile_find(mlxsw_sp, info->dev_addr);
if (profile)
return 0;
max_rif_mac_profiles = mlxsw_sp->router->max_rif_mac_profile;
occ = mlxsw_sp_rif_mac_profiles_occ_get(mlxsw_sp);
if (occ < max_rif_mac_profiles)
return 0;
if (!mlxsw_sp_rif_mac_profile_is_shared(rif))
return 0;
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interface MAC profiles");
return -ENOBUFS;
}
static bool mlxsw_sp_is_offload_xstats_event(unsigned long event)
{
switch (event) {
case NETDEV_OFFLOAD_XSTATS_ENABLE:
case NETDEV_OFFLOAD_XSTATS_DISABLE:
case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
return true;
}
return false;
}
static int
mlxsw_sp_router_port_offload_xstats_cmd(struct mlxsw_sp_rif *rif,
unsigned long event,
struct netdev_notifier_offload_xstats_info *info)
{
switch (info->type) {
case NETDEV_OFFLOAD_XSTATS_TYPE_L3:
break;
default:
return 0;
}
switch (event) {
case NETDEV_OFFLOAD_XSTATS_ENABLE:
return mlxsw_sp_router_port_l3_stats_enable(rif);
case NETDEV_OFFLOAD_XSTATS_DISABLE:
mlxsw_sp_router_port_l3_stats_disable(rif);
return 0;
case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
mlxsw_sp_router_port_l3_stats_report_used(rif, info);
return 0;
case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
return mlxsw_sp_router_port_l3_stats_report_delta(rif, info);
}
WARN_ON_ONCE(1);
return 0;
}
static int
mlxsw_sp_netdevice_offload_xstats_cmd(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev,
unsigned long event,
struct netdev_notifier_offload_xstats_info *info)
{
struct mlxsw_sp_rif *rif;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
return mlxsw_sp_router_port_offload_xstats_cmd(rif, event, info);
}
static bool mlxsw_sp_is_router_event(unsigned long event)
{
switch (event) {
case NETDEV_PRE_CHANGEADDR:
case NETDEV_CHANGEADDR:
case NETDEV_CHANGEMTU:
return true;
default:
return false;
}
}
static int mlxsw_sp_netdevice_router_port_event(struct net_device *dev,
unsigned long event, void *ptr)
{
struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif *rif;
mlxsw_sp = mlxsw_sp_lower_get(dev);
if (!mlxsw_sp)
return 0;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
switch (event) {
case NETDEV_CHANGEMTU:
case NETDEV_CHANGEADDR:
return mlxsw_sp_router_port_change_event(mlxsw_sp, rif, extack);
case NETDEV_PRE_CHANGEADDR:
return mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr);
default:
WARN_ON_ONCE(1);
break;
}
return 0;
}
static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp,
struct net_device *l3_dev,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif *rif;
/* If netdev is already associated with a RIF, then we need to
* destroy it and create a new one with the new virtual router ID.
*/
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (rif)
__mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN,
extack);
return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack);
}
static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp,
struct net_device *l3_dev)
{
struct mlxsw_sp_rif *rif;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (!rif)
return;
__mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL);
}
static bool mlxsw_sp_is_vrf_event(unsigned long event, void *ptr)
{
struct netdev_notifier_changeupper_info *info = ptr;
if (event != NETDEV_PRECHANGEUPPER && event != NETDEV_CHANGEUPPER)
return false;
return netif_is_l3_master(info->upper_dev);
}
static int
mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event,
struct netdev_notifier_changeupper_info *info)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev);
int err = 0;
/* We do not create a RIF for a macvlan, but only use it to
* direct more MAC addresses to the router.
*/
if (!mlxsw_sp || netif_is_macvlan(l3_dev))
return 0;
switch (event) {
case NETDEV_PRECHANGEUPPER:
break;
case NETDEV_CHANGEUPPER:
if (info->linking) {
struct netlink_ext_ack *extack;
extack = netdev_notifier_info_to_extack(&info->info);
err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack);
} else {
mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev);
}
break;
}
return err;
}
static int mlxsw_sp_router_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct mlxsw_sp_router *router;
struct mlxsw_sp *mlxsw_sp;
int err = 0;
router = container_of(nb, struct mlxsw_sp_router, netdevice_nb);
mlxsw_sp = router->mlxsw_sp;
mutex_lock(&mlxsw_sp->router->lock);
if (mlxsw_sp_is_offload_xstats_event(event))
err = mlxsw_sp_netdevice_offload_xstats_cmd(mlxsw_sp, dev,
event, ptr);
else if (mlxsw_sp_netdev_is_ipip_ol(mlxsw_sp, dev))
err = mlxsw_sp_netdevice_ipip_ol_event(mlxsw_sp, dev,
event, ptr);
else if (mlxsw_sp_netdev_is_ipip_ul(mlxsw_sp, dev))
err = mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, dev,
event, ptr);
else if (mlxsw_sp_is_router_event(event))
err = mlxsw_sp_netdevice_router_port_event(dev, event, ptr);
else if (mlxsw_sp_is_vrf_event(event, ptr))
err = mlxsw_sp_netdevice_vrf_event(dev, event, ptr);
mutex_unlock(&mlxsw_sp->router->lock);
return notifier_from_errno(err);
}
static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev,
struct netdev_nested_priv *priv)
{
struct mlxsw_sp_rif *rif = (struct mlxsw_sp_rif *)priv->data;
if (!netif_is_macvlan(dev))
return 0;
return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
}
static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif)
{
struct netdev_nested_priv priv = {
.data = (void *)rif,
};
if (!netif_is_macvlan_port(rif->dev))
return 0;
netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n");
return netdev_walk_all_upper_dev_rcu(rif->dev,
__mlxsw_sp_rif_macvlan_flush, &priv);
}
static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params)
{
struct mlxsw_sp_rif_subport *rif_subport;
rif_subport = mlxsw_sp_rif_subport_rif(rif);
refcount_set(&rif_subport->ref_count, 1);
rif_subport->vid = params->vid;
rif_subport->lag = params->lag;
if (params->lag)
rif_subport->lag_id = params->lag_id;
else
rif_subport->system_port = params->system_port;
}
static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif_subport *rif_subport;
char ritr_pl[MLXSW_REG_RITR_LEN];
u16 efid;
rif_subport = mlxsw_sp_rif_subport_rif(rif);
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF,
rif->rif_index, rif->vr_id, rif->dev->mtu);
mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr);
mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, rif->mac_profile_id);
efid = mlxsw_sp_fid_index(rif->fid);
mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag,
rif_subport->lag ? rif_subport->lag_id :
rif_subport->system_port,
efid, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
u8 mac_profile;
int err;
err = mlxsw_sp_rif_mac_profile_get(rif->mlxsw_sp, rif->addr,
&mac_profile, extack);
if (err)
return err;
rif->mac_profile_id = mac_profile;
err = mlxsw_sp_rif_subport_op(rif, true);
if (err)
goto err_rif_subport_op;
err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), true);
if (err)
goto err_rif_fdb_op;
err = mlxsw_sp_fid_rif_set(rif->fid, rif);
if (err)
goto err_fid_rif_set;
return 0;
err_fid_rif_set:
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
err_rif_fdb_op:
mlxsw_sp_rif_subport_op(rif, false);
err_rif_subport_op:
mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, mac_profile);
return err;
}
static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_fid *fid = rif->fid;
mlxsw_sp_fid_rif_unset(fid);
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(fid), false);
mlxsw_sp_rif_macvlan_flush(rif);
mlxsw_sp_rif_subport_op(rif, false);
mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id);
}
static struct mlxsw_sp_fid *
mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = {
.type = MLXSW_SP_RIF_TYPE_SUBPORT,
.rif_size = sizeof(struct mlxsw_sp_rif_subport),
.setup = mlxsw_sp_rif_subport_setup,
.configure = mlxsw_sp_rif_subport_configure,
.deconfigure = mlxsw_sp_rif_subport_deconfigure,
.fid_get = mlxsw_sp_rif_subport_fid_get,
};
static int mlxsw_sp_rif_fid_op(struct mlxsw_sp_rif *rif, u16 fid, bool enable)
{
enum mlxsw_reg_ritr_if_type type = MLXSW_REG_RITR_FID_IF;
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id,
rif->dev->mtu);
mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr);
mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, rif->mac_profile_id);
mlxsw_reg_ritr_fid_if_fid_set(ritr_pl, fid);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
u16 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp)
{
return mlxsw_core_max_ports(mlxsw_sp->core) + 1;
}
static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u16 fid_index = mlxsw_sp_fid_index(rif->fid);
u8 mac_profile;
int err;
err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, rif->addr,
&mac_profile, extack);
if (err)
return err;
rif->mac_profile_id = mac_profile;
err = mlxsw_sp_rif_fid_op(rif, fid_index, true);
if (err)
goto err_rif_fid_op;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_mc_flood_set;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_bc_flood_set;
err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), true);
if (err)
goto err_rif_fdb_op;
err = mlxsw_sp_fid_rif_set(rif->fid, rif);
if (err)
goto err_fid_rif_set;
return 0;
err_fid_rif_set:
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
err_rif_fdb_op:
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
err_fid_bc_flood_set:
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), false);
err_fid_mc_flood_set:
mlxsw_sp_rif_fid_op(rif, fid_index, false);
err_rif_fid_op:
mlxsw_sp_rif_mac_profile_put(mlxsw_sp, mac_profile);
return err;
}
static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif)
{
u16 fid_index = mlxsw_sp_fid_index(rif->fid);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_fid *fid = rif->fid;
mlxsw_sp_fid_rif_unset(fid);
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(fid), false);
mlxsw_sp_rif_macvlan_flush(rif);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_rif_fid_op(rif, fid_index, false);
mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id);
}
static struct mlxsw_sp_fid *
mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex);
}
static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac)
{
struct switchdev_notifier_fdb_info info = {};
struct net_device *dev;
dev = br_fdb_find_port(rif->dev, mac, 0);
if (!dev)
return;
info.addr = mac;
info.vid = 0;
call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info,
NULL);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = {
.type = MLXSW_SP_RIF_TYPE_FID,
.rif_size = sizeof(struct mlxsw_sp_rif),
.configure = mlxsw_sp_rif_fid_configure,
.deconfigure = mlxsw_sp_rif_fid_deconfigure,
.fid_get = mlxsw_sp_rif_fid_fid_get,
.fdb_del = mlxsw_sp_rif_fid_fdb_del,
};
static struct mlxsw_sp_fid *
mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
struct net_device *br_dev;
u16 vid;
int err;
if (is_vlan_dev(rif->dev)) {
vid = vlan_dev_vlan_id(rif->dev);
br_dev = vlan_dev_real_dev(rif->dev);
if (WARN_ON(!netif_is_bridge_master(br_dev)))
return ERR_PTR(-EINVAL);
} else {
err = br_vlan_get_pvid(rif->dev, &vid);
if (err < 0 || !vid) {
NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID");
return ERR_PTR(-EINVAL);
}
}
return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid);
}
static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac)
{
struct switchdev_notifier_fdb_info info = {};
u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid);
struct net_device *br_dev;
struct net_device *dev;
br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev;
dev = br_fdb_find_port(br_dev, mac, vid);
if (!dev)
return;
info.addr = mac;
info.vid = vid;
call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info,
NULL);
}
static int mlxsw_sp_rif_vlan_op(struct mlxsw_sp_rif *rif, u16 vid, u16 efid,
bool enable)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
mlxsw_reg_ritr_vlan_if_pack(ritr_pl, enable, rif->rif_index, rif->vr_id,
rif->dev->mtu, rif->dev->dev_addr,
rif->mac_profile_id, vid, efid);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif, u16 efid,
struct netlink_ext_ack *extack)
{
u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u8 mac_profile;
int err;
err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, rif->addr,
&mac_profile, extack);
if (err)
return err;
rif->mac_profile_id = mac_profile;
err = mlxsw_sp_rif_vlan_op(rif, vid, efid, true);
if (err)
goto err_rif_vlan_fid_op;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_mc_flood_set;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_bc_flood_set;
err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), true);
if (err)
goto err_rif_fdb_op;
err = mlxsw_sp_fid_rif_set(rif->fid, rif);
if (err)
goto err_fid_rif_set;
return 0;
err_fid_rif_set:
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
err_rif_fdb_op:
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
err_fid_bc_flood_set:
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), false);
err_fid_mc_flood_set:
mlxsw_sp_rif_vlan_op(rif, vid, 0, false);
err_rif_vlan_fid_op:
mlxsw_sp_rif_mac_profile_put(mlxsw_sp, mac_profile);
return err;
}
static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif)
{
u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
mlxsw_sp_fid_rif_unset(rif->fid);
mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(rif->fid), false);
mlxsw_sp_rif_macvlan_flush(rif);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_rif_vlan_op(rif, vid, 0, false);
mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id);
}
static int mlxsw_sp1_rif_vlan_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
return mlxsw_sp_rif_vlan_configure(rif, 0, extack);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_vlan_ops = {
.type = MLXSW_SP_RIF_TYPE_VLAN,
.rif_size = sizeof(struct mlxsw_sp_rif),
.configure = mlxsw_sp1_rif_vlan_configure,
.deconfigure = mlxsw_sp_rif_vlan_deconfigure,
.fid_get = mlxsw_sp_rif_vlan_fid_get,
.fdb_del = mlxsw_sp_rif_vlan_fdb_del,
};
static int mlxsw_sp2_rif_vlan_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
u16 efid = mlxsw_sp_fid_index(rif->fid);
return mlxsw_sp_rif_vlan_configure(rif, efid, extack);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_vlan_ops = {
.type = MLXSW_SP_RIF_TYPE_VLAN,
.rif_size = sizeof(struct mlxsw_sp_rif),
.configure = mlxsw_sp2_rif_vlan_configure,
.deconfigure = mlxsw_sp_rif_vlan_deconfigure,
.fid_get = mlxsw_sp_rif_vlan_fid_get,
.fdb_del = mlxsw_sp_rif_vlan_fdb_del,
};
static struct mlxsw_sp_rif_ipip_lb *
mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif)
{
return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common);
}
static void
mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params)
{
struct mlxsw_sp_rif_params_ipip_lb *params_lb;
struct mlxsw_sp_rif_ipip_lb *rif_lb;
params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb,
common);
rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif);
rif_lb->lb_config = params_lb->lb_config;
}
static int
mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_vr *ul_vr;
int err;
ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL);
if (IS_ERR(ul_vr))
return PTR_ERR(ul_vr);
err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true);
if (err)
goto err_loopback_op;
lb_rif->ul_vr_id = ul_vr->id;
lb_rif->ul_rif_id = 0;
++ul_vr->rif_count;
return 0;
err_loopback_op:
mlxsw_sp_vr_put(mlxsw_sp, ul_vr);
return err;
}
static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_vr *ul_vr;
ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id];
mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false);
--ul_vr->rif_count;
mlxsw_sp_vr_put(mlxsw_sp, ul_vr);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = {
.type = MLXSW_SP_RIF_TYPE_IPIP_LB,
.rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb),
.setup = mlxsw_sp_rif_ipip_lb_setup,
.configure = mlxsw_sp1_rif_ipip_lb_configure,
.deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure,
};
static const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = {
[MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops,
[MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp1_rif_vlan_ops,
[MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops,
[MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops,
};
static int
mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF,
ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU);
mlxsw_reg_ritr_loopback_protocol_set(ritr_pl,
MLXSW_REG_RITR_LOOPBACK_GENERIC);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static struct mlxsw_sp_rif *
mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif *ul_rif;
u8 rif_entries = 1;
u16 rif_index;
int err;
err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index, rif_entries);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces");
return ERR_PTR(err);
}
ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL);
if (!ul_rif) {
err = -ENOMEM;
goto err_rif_alloc;
}
mlxsw_sp->router->rifs[rif_index] = ul_rif;
ul_rif->mlxsw_sp = mlxsw_sp;
ul_rif->rif_entries = rif_entries;
err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true);
if (err)
goto ul_rif_op_err;
atomic_add(rif_entries, &mlxsw_sp->router->rifs_count);
return ul_rif;
ul_rif_op_err:
mlxsw_sp->router->rifs[rif_index] = NULL;
kfree(ul_rif);
err_rif_alloc:
mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
return ERR_PTR(err);
}
static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
u8 rif_entries = ul_rif->rif_entries;
u16 rif_index = ul_rif->rif_index;
atomic_sub(rif_entries, &mlxsw_sp->router->rifs_count);
mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false);
mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL;
kfree(ul_rif);
mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries);
}
static struct mlxsw_sp_rif *
mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack);
if (IS_ERR(vr))
return ERR_CAST(vr);
if (refcount_inc_not_zero(&vr->ul_rif_refcnt))
return vr->ul_rif;
vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack);
if (IS_ERR(vr->ul_rif)) {
err = PTR_ERR(vr->ul_rif);
goto err_ul_rif_create;
}
vr->rif_count++;
refcount_set(&vr->ul_rif_refcnt, 1);
return vr->ul_rif;
err_ul_rif_create:
mlxsw_sp_vr_put(mlxsw_sp, vr);
return ERR_PTR(err);
}
static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif)
{
struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp;
struct mlxsw_sp_vr *vr;
vr = &mlxsw_sp->router->vrs[ul_rif->vr_id];
if (!refcount_dec_and_test(&vr->ul_rif_refcnt))
return;
vr->rif_count--;
mlxsw_sp_ul_rif_destroy(ul_rif);
mlxsw_sp_vr_put(mlxsw_sp, vr);
}
int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id,
u16 *ul_rif_index)
{
struct mlxsw_sp_rif *ul_rif;
int err = 0;
mutex_lock(&mlxsw_sp->router->lock);
ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL);
if (IS_ERR(ul_rif)) {
err = PTR_ERR(ul_rif);
goto out;
}
*ul_rif_index = ul_rif->rif_index;
out:
mutex_unlock(&mlxsw_sp->router->lock);
return err;
}
void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index)
{
struct mlxsw_sp_rif *ul_rif;
mutex_lock(&mlxsw_sp->router->lock);
ul_rif = mlxsw_sp->router->rifs[ul_rif_index];
if (WARN_ON(!ul_rif))
goto out;
mlxsw_sp_ul_rif_put(ul_rif);
out:
mutex_unlock(&mlxsw_sp->router->lock);
}
static int
mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif *ul_rif;
int err;
ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL);
if (IS_ERR(ul_rif))
return PTR_ERR(ul_rif);
err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true);
if (err)
goto err_loopback_op;
lb_rif->ul_vr_id = 0;
lb_rif->ul_rif_id = ul_rif->rif_index;
return 0;
err_loopback_op:
mlxsw_sp_ul_rif_put(ul_rif);
return err;
}
static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif);
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif *ul_rif;
ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id);
mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false);
mlxsw_sp_ul_rif_put(ul_rif);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = {
.type = MLXSW_SP_RIF_TYPE_IPIP_LB,
.rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb),
.setup = mlxsw_sp_rif_ipip_lb_setup,
.configure = mlxsw_sp2_rif_ipip_lb_configure,
.deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure,
};
static const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = {
[MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops,
[MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp2_rif_vlan_ops,
[MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops,
[MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops,
};
static int mlxsw_sp_rifs_table_init(struct mlxsw_sp *mlxsw_sp)
{
struct gen_pool *rifs_table;
int err;
rifs_table = gen_pool_create(0, -1);
if (!rifs_table)
return -ENOMEM;
gen_pool_set_algo(rifs_table, gen_pool_first_fit_order_align,
NULL);
err = gen_pool_add(rifs_table, MLXSW_SP_ROUTER_GENALLOC_OFFSET,
MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS), -1);
if (err)
goto err_gen_pool_add;
mlxsw_sp->router->rifs_table = rifs_table;
return 0;
err_gen_pool_add:
gen_pool_destroy(rifs_table);
return err;
}
static void mlxsw_sp_rifs_table_fini(struct mlxsw_sp *mlxsw_sp)
{
gen_pool_destroy(mlxsw_sp->router->rifs_table);
}
static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp)
{
u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
struct mlxsw_core *core = mlxsw_sp->core;
int err;
if (!MLXSW_CORE_RES_VALID(core, MAX_RIF_MAC_PROFILES))
return -EIO;
mlxsw_sp->router->max_rif_mac_profile =
MLXSW_CORE_RES_GET(core, MAX_RIF_MAC_PROFILES);
mlxsw_sp->router->rifs = kcalloc(max_rifs,
sizeof(struct mlxsw_sp_rif *),
GFP_KERNEL);
if (!mlxsw_sp->router->rifs)
return -ENOMEM;
err = mlxsw_sp_rifs_table_init(mlxsw_sp);
if (err)
goto err_rifs_table_init;
idr_init(&mlxsw_sp->router->rif_mac_profiles_idr);
atomic_set(&mlxsw_sp->router->rif_mac_profiles_count, 0);
atomic_set(&mlxsw_sp->router->rifs_count, 0);
devl_resource_occ_get_register(devlink,
MLXSW_SP_RESOURCE_RIF_MAC_PROFILES,
mlxsw_sp_rif_mac_profiles_occ_get,
mlxsw_sp);
devl_resource_occ_get_register(devlink,
MLXSW_SP_RESOURCE_RIFS,
mlxsw_sp_rifs_occ_get,
mlxsw_sp);
return 0;
err_rifs_table_init:
kfree(mlxsw_sp->router->rifs);
return err;
}
static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
int i;
WARN_ON_ONCE(atomic_read(&mlxsw_sp->router->rifs_count));
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++)
WARN_ON_ONCE(mlxsw_sp->router->rifs[i]);
devl_resource_occ_get_unregister(devlink, MLXSW_SP_RESOURCE_RIFS);
devl_resource_occ_get_unregister(devlink,
MLXSW_SP_RESOURCE_RIF_MAC_PROFILES);
WARN_ON(!idr_is_empty(&mlxsw_sp->router->rif_mac_profiles_idr));
idr_destroy(&mlxsw_sp->router->rif_mac_profiles_idr);
mlxsw_sp_rifs_table_fini(mlxsw_sp);
kfree(mlxsw_sp->router->rifs);
}
static int
mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp)
{
char tigcr_pl[MLXSW_REG_TIGCR_LEN];
mlxsw_reg_tigcr_pack(tigcr_pl, true, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl);
}
static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp)
{
int err;
INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list);
err = mlxsw_sp_ipip_ecn_encap_init(mlxsw_sp);
if (err)
return err;
err = mlxsw_sp_ipip_ecn_decap_init(mlxsw_sp);
if (err)
return err;
return mlxsw_sp_ipip_config_tigcr(mlxsw_sp);
}
static int mlxsw_sp1_ipips_init(struct mlxsw_sp *mlxsw_sp)
{
mlxsw_sp->router->ipip_ops_arr = mlxsw_sp1_ipip_ops_arr;
return mlxsw_sp_ipips_init(mlxsw_sp);
}
static int mlxsw_sp2_ipips_init(struct mlxsw_sp *mlxsw_sp)
{
mlxsw_sp->router->ipip_ops_arr = mlxsw_sp2_ipip_ops_arr;
return mlxsw_sp_ipips_init(mlxsw_sp);
}
static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp)
{
WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list));
}
static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb)
{
struct mlxsw_sp_router *router;
/* Flush pending FIB notifications and then flush the device's
* table before requesting another dump. The FIB notification
* block is unregistered, so no need to take RTNL.
*/
mlxsw_core_flush_owq();
router = container_of(nb, struct mlxsw_sp_router, fib_nb);
mlxsw_sp_router_fib_flush(router->mlxsw_sp);
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
struct mlxsw_sp_mp_hash_config {
DECLARE_BITMAP(headers, __MLXSW_REG_RECR2_HEADER_CNT);
DECLARE_BITMAP(fields, __MLXSW_REG_RECR2_FIELD_CNT);
DECLARE_BITMAP(inner_headers, __MLXSW_REG_RECR2_HEADER_CNT);
DECLARE_BITMAP(inner_fields, __MLXSW_REG_RECR2_INNER_FIELD_CNT);
bool inc_parsing_depth;
};
#define MLXSW_SP_MP_HASH_HEADER_SET(_headers, _header) \
bitmap_set(_headers, MLXSW_REG_RECR2_##_header, 1)
#define MLXSW_SP_MP_HASH_FIELD_SET(_fields, _field) \
bitmap_set(_fields, MLXSW_REG_RECR2_##_field, 1)
#define MLXSW_SP_MP_HASH_FIELD_RANGE_SET(_fields, _field, _nr) \
bitmap_set(_fields, MLXSW_REG_RECR2_##_field, _nr)
static void mlxsw_sp_mp_hash_inner_l3(struct mlxsw_sp_mp_hash_config *config)
{
unsigned long *inner_headers = config->inner_headers;
unsigned long *inner_fields = config->inner_fields;
/* IPv4 inner */
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_TCP_UDP);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_SIP0, 4);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_DIP0, 4);
/* IPv6 inner */
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_TCP_UDP);
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_SIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_SIP8, 8);
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_DIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_DIP8, 8);
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_NEXT_HEADER);
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_FLOW_LABEL);
}
static void mlxsw_sp_mp4_hash_outer_addr(struct mlxsw_sp_mp_hash_config *config)
{
unsigned long *headers = config->headers;
unsigned long *fields = config->fields;
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_TCP_UDP);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_SIP0, 4);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_DIP0, 4);
}
static void
mlxsw_sp_mp_hash_inner_custom(struct mlxsw_sp_mp_hash_config *config,
u32 hash_fields)
{
unsigned long *inner_headers = config->inner_headers;
unsigned long *inner_fields = config->inner_fields;
/* IPv4 Inner */
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_TCP_UDP);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP)
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_SIP0, 4);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP)
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_DIP0, 4);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO)
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV4_PROTOCOL);
/* IPv6 inner */
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_TCP_UDP);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP) {
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_SIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_SIP8, 8);
}
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP) {
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_DIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_DIP8, 8);
}
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO)
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_NEXT_HEADER);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL)
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_FLOW_LABEL);
/* L4 inner */
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, TCP_UDP_EN_IPV4);
MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, TCP_UDP_EN_IPV6);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_TCP_UDP_SPORT);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_TCP_UDP_DPORT);
}
static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mp_hash_config *config)
{
struct net *net = mlxsw_sp_net(mlxsw_sp);
unsigned long *headers = config->headers;
unsigned long *fields = config->fields;
u32 hash_fields;
switch (READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_policy)) {
case 0:
mlxsw_sp_mp4_hash_outer_addr(config);
break;
case 1:
mlxsw_sp_mp4_hash_outer_addr(config);
MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV4);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV4_PROTOCOL);
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT);
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT);
break;
case 2:
/* Outer */
mlxsw_sp_mp4_hash_outer_addr(config);
/* Inner */
mlxsw_sp_mp_hash_inner_l3(config);
break;
case 3:
hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields);
/* Outer */
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_TCP_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV4);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_IP)
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_SIP0, 4);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_IP)
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_DIP0, 4);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_IP_PROTO)
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV4_PROTOCOL);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT);
/* Inner */
mlxsw_sp_mp_hash_inner_custom(config, hash_fields);
break;
}
}
static void mlxsw_sp_mp6_hash_outer_addr(struct mlxsw_sp_mp_hash_config *config)
{
unsigned long *headers = config->headers;
unsigned long *fields = config->fields;
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_TCP_UDP);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_SIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_SIP8, 8);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_DIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_DIP8, 8);
}
static void mlxsw_sp_mp6_hash_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mp_hash_config *config)
{
u32 hash_fields = ip6_multipath_hash_fields(mlxsw_sp_net(mlxsw_sp));
unsigned long *headers = config->headers;
unsigned long *fields = config->fields;
switch (ip6_multipath_hash_policy(mlxsw_sp_net(mlxsw_sp))) {
case 0:
mlxsw_sp_mp6_hash_outer_addr(config);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL);
break;
case 1:
mlxsw_sp_mp6_hash_outer_addr(config);
MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV6);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER);
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT);
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT);
break;
case 2:
/* Outer */
mlxsw_sp_mp6_hash_outer_addr(config);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER);
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL);
/* Inner */
mlxsw_sp_mp_hash_inner_l3(config);
config->inc_parsing_depth = true;
break;
case 3:
/* Outer */
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_NOT_TCP_NOT_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_TCP_UDP);
MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV6);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_IP) {
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_SIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_SIP8, 8);
}
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_IP) {
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_DIP0_7);
MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_DIP8, 8);
}
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_IP_PROTO)
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_FLOWLABEL)
MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_PORT)
MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT);
/* Inner */
mlxsw_sp_mp_hash_inner_custom(config, hash_fields);
if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_MASK)
config->inc_parsing_depth = true;
break;
}
}
static int mlxsw_sp_mp_hash_parsing_depth_adjust(struct mlxsw_sp *mlxsw_sp,
bool old_inc_parsing_depth,
bool new_inc_parsing_depth)
{
int err;
if (!old_inc_parsing_depth && new_inc_parsing_depth) {
err = mlxsw_sp_parsing_depth_inc(mlxsw_sp);
if (err)
return err;
mlxsw_sp->router->inc_parsing_depth = true;
} else if (old_inc_parsing_depth && !new_inc_parsing_depth) {
mlxsw_sp_parsing_depth_dec(mlxsw_sp);
mlxsw_sp->router->inc_parsing_depth = false;
}
return 0;
}
static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp)
{
bool old_inc_parsing_depth, new_inc_parsing_depth;
struct mlxsw_sp_mp_hash_config config = {};
char recr2_pl[MLXSW_REG_RECR2_LEN];
unsigned long bit;
u32 seed;
int err;
seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0);
mlxsw_reg_recr2_pack(recr2_pl, seed);
mlxsw_sp_mp4_hash_init(mlxsw_sp, &config);
mlxsw_sp_mp6_hash_init(mlxsw_sp, &config);
old_inc_parsing_depth = mlxsw_sp->router->inc_parsing_depth;
new_inc_parsing_depth = config.inc_parsing_depth;
err = mlxsw_sp_mp_hash_parsing_depth_adjust(mlxsw_sp,
old_inc_parsing_depth,
new_inc_parsing_depth);
if (err)
return err;
for_each_set_bit(bit, config.headers, __MLXSW_REG_RECR2_HEADER_CNT)
mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, bit, 1);
for_each_set_bit(bit, config.fields, __MLXSW_REG_RECR2_FIELD_CNT)
mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, bit, 1);
for_each_set_bit(bit, config.inner_headers, __MLXSW_REG_RECR2_HEADER_CNT)
mlxsw_reg_recr2_inner_header_enables_set(recr2_pl, bit, 1);
for_each_set_bit(bit, config.inner_fields, __MLXSW_REG_RECR2_INNER_FIELD_CNT)
mlxsw_reg_recr2_inner_header_fields_enable_set(recr2_pl, bit, 1);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl);
if (err)
goto err_reg_write;
return 0;
err_reg_write:
mlxsw_sp_mp_hash_parsing_depth_adjust(mlxsw_sp, new_inc_parsing_depth,
old_inc_parsing_depth);
return err;
}
static void mlxsw_sp_mp_hash_fini(struct mlxsw_sp *mlxsw_sp)
{
bool old_inc_parsing_depth = mlxsw_sp->router->inc_parsing_depth;
mlxsw_sp_mp_hash_parsing_depth_adjust(mlxsw_sp, old_inc_parsing_depth,
false);
}
#else
static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp)
{
return 0;
}
static void mlxsw_sp_mp_hash_fini(struct mlxsw_sp *mlxsw_sp)
{
}
#endif
static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp)
{
char rdpm_pl[MLXSW_REG_RDPM_LEN];
unsigned int i;
MLXSW_REG_ZERO(rdpm, rdpm_pl);
/* HW is determining switch priority based on DSCP-bits, but the
* kernel is still doing that based on the ToS. Since there's a
* mismatch in bits we need to make sure to translate the right
* value ToS would observe, skipping the 2 least-significant ECN bits.
*/
for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++)
mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2));
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl);
}
static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp)
{
struct net *net = mlxsw_sp_net(mlxsw_sp);
char rgcr_pl[MLXSW_REG_RGCR_LEN];
u64 max_rifs;
bool usp;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS))
return -EIO;
max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
usp = READ_ONCE(net->ipv4.sysctl_ip_fwd_update_priority);
mlxsw_reg_rgcr_pack(rgcr_pl, true, true);
mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs);
mlxsw_reg_rgcr_usp_set(rgcr_pl, usp);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl);
}
static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
{
char rgcr_pl[MLXSW_REG_RGCR_LEN];
mlxsw_reg_rgcr_pack(rgcr_pl, false, false);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl);
}
static int mlxsw_sp_lb_rif_init(struct mlxsw_sp *mlxsw_sp)
{
u16 lb_rif_index;
int err;
/* Create a generic loopback RIF associated with the main table
* (default VRF). Any table can be used, but the main table exists
* anyway, so we do not waste resources.
*/
err = mlxsw_sp_router_ul_rif_get(mlxsw_sp, RT_TABLE_MAIN,
&lb_rif_index);
if (err)
return err;
mlxsw_sp->router->lb_rif_index = lb_rif_index;
return 0;
}
static void mlxsw_sp_lb_rif_fini(struct mlxsw_sp *mlxsw_sp)
{
mlxsw_sp_router_ul_rif_put(mlxsw_sp, mlxsw_sp->router->lb_rif_index);
}
static int mlxsw_sp1_router_init(struct mlxsw_sp *mlxsw_sp)
{
size_t size_ranges_count = ARRAY_SIZE(mlxsw_sp1_adj_grp_size_ranges);
mlxsw_sp->router->rif_ops_arr = mlxsw_sp1_rif_ops_arr;
mlxsw_sp->router->adj_grp_size_ranges = mlxsw_sp1_adj_grp_size_ranges;
mlxsw_sp->router->adj_grp_size_ranges_count = size_ranges_count;
return 0;
}
const struct mlxsw_sp_router_ops mlxsw_sp1_router_ops = {
.init = mlxsw_sp1_router_init,
.ipips_init = mlxsw_sp1_ipips_init,
};
static int mlxsw_sp2_router_init(struct mlxsw_sp *mlxsw_sp)
{
size_t size_ranges_count = ARRAY_SIZE(mlxsw_sp2_adj_grp_size_ranges);
mlxsw_sp->router->rif_ops_arr = mlxsw_sp2_rif_ops_arr;
mlxsw_sp->router->adj_grp_size_ranges = mlxsw_sp2_adj_grp_size_ranges;
mlxsw_sp->router->adj_grp_size_ranges_count = size_ranges_count;
return 0;
}
const struct mlxsw_sp_router_ops mlxsw_sp2_router_ops = {
.init = mlxsw_sp2_router_init,
.ipips_init = mlxsw_sp2_ipips_init,
};
int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp,
struct netlink_ext_ack *extack)
{
struct mlxsw_sp_router *router;
int err;
router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL);
if (!router)
return -ENOMEM;
mutex_init(&router->lock);
mlxsw_sp->router = router;
router->mlxsw_sp = mlxsw_sp;
err = mlxsw_sp->router_ops->init(mlxsw_sp);
if (err)
goto err_router_ops_init;
INIT_LIST_HEAD(&mlxsw_sp->router->nh_res_grp_list);
INIT_DELAYED_WORK(&mlxsw_sp->router->nh_grp_activity_dw,
mlxsw_sp_nh_grp_activity_work);
INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list);
err = __mlxsw_sp_router_init(mlxsw_sp);
if (err)
goto err_router_init;
err = mlxsw_sp_rifs_init(mlxsw_sp);
if (err)
goto err_rifs_init;
err = mlxsw_sp->router_ops->ipips_init(mlxsw_sp);
if (err)
goto err_ipips_init;
err = rhashtable_init(&mlxsw_sp->router->nexthop_ht,
&mlxsw_sp_nexthop_ht_params);
if (err)
goto err_nexthop_ht_init;
err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht,
&mlxsw_sp_nexthop_group_ht_params);
if (err)
goto err_nexthop_group_ht_init;
INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list);
err = mlxsw_sp_lpm_init(mlxsw_sp);
if (err)
goto err_lpm_init;
err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops);
if (err)
goto err_mr_init;
err = mlxsw_sp_vrs_init(mlxsw_sp);
if (err)
goto err_vrs_init;
err = mlxsw_sp_lb_rif_init(mlxsw_sp);
if (err)
goto err_lb_rif_init;
err = mlxsw_sp_neigh_init(mlxsw_sp);
if (err)
goto err_neigh_init;
err = mlxsw_sp_mp_hash_init(mlxsw_sp);
if (err)
goto err_mp_hash_init;
err = mlxsw_sp_dscp_init(mlxsw_sp);
if (err)
goto err_dscp_init;
router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event;
err = register_inetaddr_notifier(&router->inetaddr_nb);
if (err)
goto err_register_inetaddr_notifier;
router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event;
err = register_inet6addr_notifier(&router->inet6addr_nb);
if (err)
goto err_register_inet6addr_notifier;
mlxsw_sp->router->netevent_nb.notifier_call =
mlxsw_sp_router_netevent_event;
err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb);
if (err)
goto err_register_netevent_notifier;
mlxsw_sp->router->nexthop_nb.notifier_call =
mlxsw_sp_nexthop_obj_event;
err = register_nexthop_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->nexthop_nb,
extack);
if (err)
goto err_register_nexthop_notifier;
mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event;
err = register_fib_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->fib_nb,
mlxsw_sp_router_fib_dump_flush, extack);
if (err)
goto err_register_fib_notifier;
mlxsw_sp->router->netdevice_nb.notifier_call =
mlxsw_sp_router_netdevice_event;
err = register_netdevice_notifier_net(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->netdevice_nb);
if (err)
goto err_register_netdev_notifier;
return 0;
err_register_netdev_notifier:
unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->fib_nb);
err_register_fib_notifier:
unregister_nexthop_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->nexthop_nb);
err_register_nexthop_notifier:
unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb);
err_register_netevent_notifier:
unregister_inet6addr_notifier(&router->inet6addr_nb);
err_register_inet6addr_notifier:
unregister_inetaddr_notifier(&router->inetaddr_nb);
err_register_inetaddr_notifier:
mlxsw_core_flush_owq();
err_dscp_init:
mlxsw_sp_mp_hash_fini(mlxsw_sp);
err_mp_hash_init:
mlxsw_sp_neigh_fini(mlxsw_sp);
err_neigh_init:
mlxsw_sp_lb_rif_fini(mlxsw_sp);
err_lb_rif_init:
mlxsw_sp_vrs_fini(mlxsw_sp);
err_vrs_init:
mlxsw_sp_mr_fini(mlxsw_sp);
err_mr_init:
mlxsw_sp_lpm_fini(mlxsw_sp);
err_lpm_init:
rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht);
err_nexthop_group_ht_init:
rhashtable_destroy(&mlxsw_sp->router->nexthop_ht);
err_nexthop_ht_init:
mlxsw_sp_ipips_fini(mlxsw_sp);
err_ipips_init:
mlxsw_sp_rifs_fini(mlxsw_sp);
err_rifs_init:
__mlxsw_sp_router_fini(mlxsw_sp);
err_router_init:
cancel_delayed_work_sync(&mlxsw_sp->router->nh_grp_activity_dw);
err_router_ops_init:
mutex_destroy(&mlxsw_sp->router->lock);
kfree(mlxsw_sp->router);
return err;
}
void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
{
unregister_netdevice_notifier_net(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->netdevice_nb);
unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->fib_nb);
unregister_nexthop_notifier(mlxsw_sp_net(mlxsw_sp),
&mlxsw_sp->router->nexthop_nb);
unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb);
unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb);
unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb);
mlxsw_core_flush_owq();
mlxsw_sp_mp_hash_fini(mlxsw_sp);
mlxsw_sp_neigh_fini(mlxsw_sp);
mlxsw_sp_lb_rif_fini(mlxsw_sp);
mlxsw_sp_vrs_fini(mlxsw_sp);
mlxsw_sp_mr_fini(mlxsw_sp);
mlxsw_sp_lpm_fini(mlxsw_sp);
rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht);
rhashtable_destroy(&mlxsw_sp->router->nexthop_ht);
mlxsw_sp_ipips_fini(mlxsw_sp);
mlxsw_sp_rifs_fini(mlxsw_sp);
__mlxsw_sp_router_fini(mlxsw_sp);
cancel_delayed_work_sync(&mlxsw_sp->router->nh_grp_activity_dw);
mutex_destroy(&mlxsw_sp->router->lock);
kfree(mlxsw_sp->router);
}
