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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2007 Luca Bigliardi (shammash@artha.org). * * Transport usage: * ethN=vde,<vde_switch>,<mac addr>,<port>,<group>,<mode>,<description> * */ #include <linux/init.h> #include <linux/netdevice.h> #include <net_kern.h> #include <net_user.h> #include "vde.h" static void vde_init(struct net_device *dev, void *data) { struct vde_init *init = data; struct uml_net_private *pri; struct vde_data *vpri; pri = netdev_priv(dev); vpri = (struct vde_data *) pri->user; vpri->vde_switch = init->vde_switch; vpri->descr = init->descr ? init->descr : "UML vde_transport"; vpri->args = NULL; vpri->conn = NULL; vpri->dev = dev; printk("vde backend - %s, ", vpri->vde_switch ? vpri->vde_switch : "(default socket)"); vde_init_libstuff(vpri, init); printk("\n"); } static int vde_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) { struct vde_data *pri = (struct vde_data *) &lp->user; if (pri->conn != NULL) return vde_user_read(pri->conn, skb_mac_header(skb), skb->dev->mtu + ETH_HEADER_OTHER); printk(KERN_ERR "vde_read - we have no VDECONN to read from"); return -EBADF; } static int vde_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) { struct vde_data *pri = (struct vde_data *) &lp->user; if (pri->conn != NULL) return vde_user_write((void *)pri->conn, skb->data, skb->len); printk(KERN_ERR "vde_write - we have no VDECONN to write to"); return -EBADF; } static const struct net_kern_info vde_kern_info = { .init = vde_init, .protocol = eth_protocol, .read = vde_read, .write = vde_write, }; static int vde_setup(char *str, char **mac_out, void *data) { struct vde_init *init = data; char *remain, *port_str = NULL, *mode_str = NULL, *last; *init = ((struct vde_init) { .vde_switch = NULL, .descr = NULL, .port = 0, .group = NULL, .mode = 0 }); remain = split_if_spec(str, &init->vde_switch, mac_out, &port_str, &init->group, &mode_str, &init->descr, NULL); if (remain != NULL) printk(KERN_WARNING "vde_setup - Ignoring extra data :" "'%s'\n", remain); if (port_str != NULL) { init->port = simple_strtoul(port_str, &last, 10); if ((*last != '\0') || (last == port_str)) { printk(KERN_ERR "vde_setup - Bad port : '%s'\n", port_str); return 0; } } if (mode_str != NULL) { init->mode = simple_strtoul(mode_str, &last, 8); if ((*last != '\0') || (last == mode_str)) { printk(KERN_ERR "vde_setup - Bad mode : '%s'\n", mode_str); return 0; } } printk(KERN_INFO "Configured vde device: %s\n", init->vde_switch ? init->vde_switch : "(default socket)"); return 1; } static struct transport vde_transport = { .list = LIST_HEAD_INIT(vde_transport.list), .name = "vde", .setup = vde_setup, .user = &vde_user_info, .kern = &vde_kern_info, .private_size = sizeof(struct vde_data), .setup_size = sizeof(struct vde_init), }; static int register_vde(void) { register_transport(&vde_transport); return 0; } late_initcall(register_vde); |