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Open Menu / fs / gfs2 / rgrp.h
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
 */

#ifndef __RGRP_DOT_H__
#define __RGRP_DOT_H__

#include <linux/slab.h>
#include <linux/uaccess.h>

/* Since each block in the file system is represented by two bits in the
 * bitmap, one 64-bit word in the bitmap will represent 32 blocks.
 * By reserving 32 blocks at a time, we can optimize / shortcut how we search
 * through the bitmaps by looking a word at a time.
 */
#define RGRP_RSRV_MINBLKS 32
#define RGRP_RSRV_ADDBLKS 64

struct gfs2_rgrpd;
struct gfs2_sbd;
struct gfs2_holder;

void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);

struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);

void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
int gfs2_rindex_update(struct gfs2_sbd *sdp);
void gfs2_free_clones(struct gfs2_rgrpd *rgd);
int gfs2_rgrp_go_instantiate(struct gfs2_glock *gl);
void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);

struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);

#define GFS2_AF_ORLOV 1
int gfs2_inplace_reserve(struct gfs2_inode *ip,
			 struct gfs2_alloc_parms *ap);
void gfs2_inplace_release(struct gfs2_inode *ip);

int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
		      bool dinode);

void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
void gfs2_rs_delete(struct gfs2_inode *ip);
void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
		        u64 bstart, u32 blen, int meta);
void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
		    u64 bstart, u32 blen);
void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
void gfs2_unlink_di(struct inode *inode);
int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
		        unsigned int type);

struct gfs2_rgrp_list {
	unsigned int rl_rgrps;
	unsigned int rl_space;
	struct gfs2_rgrpd **rl_rgd;
	struct gfs2_holder *rl_ghs;
};

void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
		    u64 block);
void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist,
		      unsigned int state, u16 flags);
void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
u64 gfs2_ri_total(struct gfs2_sbd *sdp);
void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_rgrpd *rgd,
		    const char *fs_id_buf);
int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
			    struct buffer_head *bh,
			    const struct gfs2_bitmap *bi, unsigned minlen,
			    u64 *ptrimmed);
int gfs2_fitrim(struct file *filp, void __user *argp);

/* This is how to tell if a reservation is in the rgrp tree: */
static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
{
	return !RB_EMPTY_NODE(&rs->rs_node);
}

static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
{
	u64 first = rgd->rd_data0;
	u64 last = first + rgd->rd_data;
	return first <= block && block < last;
}

void check_and_update_goal(struct gfs2_inode *ip);

void rgrp_lock_local(struct gfs2_rgrpd *rgd);
void rgrp_unlock_local(struct gfs2_rgrpd *rgd);

#endif /* __RGRP_DOT_H__ */