[linux.git] / fs / gfs2 / trans.c

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/kallsyms.h>
#include <linux/gfs2_ondisk.h>

#include "gfs2.h"
#include "incore.h"
#include "glock.h"
#include "inode.h"
#include "log.h"
#include "lops.h"
#include "meta_io.h"
#include "trans.h"
#include "util.h"
#include "trace_gfs2.h"

int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
		     unsigned int revokes)
{
	struct gfs2_trans *tr;
	int error;

	BUG_ON(current->journal_info);
	BUG_ON(blocks == 0 && revokes == 0);

	if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
		return -EROFS;

	tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
	if (!tr)
		return -ENOMEM;

	tr->tr_ip = (unsigned long)__builtin_return_address(0);
	tr->tr_blocks = blocks;
	tr->tr_revokes = revokes;
	tr->tr_reserved = 1;
	if (blocks)
		tr->tr_reserved += 6 + blocks;
	if (revokes)
		tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
						   sizeof(u64));
	sb_start_intwrite(sdp->sd_vfs);
	gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);

	error = gfs2_glock_nq(&tr->tr_t_gh);
	if (error)
		goto fail_holder_uninit;

	error = gfs2_log_reserve(sdp, tr->tr_reserved);
	if (error)
		goto fail_gunlock;

	current->journal_info = tr;

	return 0;

fail_gunlock:
	gfs2_glock_dq(&tr->tr_t_gh);

fail_holder_uninit:
	sb_end_intwrite(sdp->sd_vfs);
	gfs2_holder_uninit(&tr->tr_t_gh);
	kfree(tr);

	return error;
}

/**
 * gfs2_log_release - Release a given number of log blocks
 * @sdp: The GFS2 superblock
 * @blks: The number of blocks
 *
 */

static void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
{

	atomic_add(blks, &sdp->sd_log_blks_free);
	trace_gfs2_log_blocks(sdp, blks);
	gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
				  sdp->sd_jdesc->jd_blocks);
	up_read(&sdp->sd_log_flush_lock);
}

static void gfs2_print_trans(const struct gfs2_trans *tr)
{
	printk(KERN_WARNING "GFS2: Transaction created at: %pSR\n",
	       (void *)tr->tr_ip);
	printk(KERN_WARNING "GFS2: blocks=%u revokes=%u reserved=%u touched=%d\n",
	       tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
	printk(KERN_WARNING "GFS2: Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
	       tr->tr_num_buf_new, tr->tr_num_buf_rm,
	       tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
	       tr->tr_num_revoke, tr->tr_num_revoke_rm);
}

void gfs2_trans_end(struct gfs2_sbd *sdp)
{
	struct gfs2_trans *tr = current->journal_info;
	s64 nbuf;
	BUG_ON(!tr);
	current->journal_info = NULL;

	if (!tr->tr_touched) {
		gfs2_log_release(sdp, tr->tr_reserved);
		if (tr->tr_t_gh.gh_gl) {
			gfs2_glock_dq(&tr->tr_t_gh);
			gfs2_holder_uninit(&tr->tr_t_gh);
			kfree(tr);
		}
		sb_end_intwrite(sdp->sd_vfs);
		return;
	}

	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	nbuf -= tr->tr_num_buf_rm;
	nbuf -= tr->tr_num_databuf_rm;

	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
				       (tr->tr_num_revoke <= tr->tr_revokes)))
		gfs2_print_trans(tr);

	gfs2_log_commit(sdp, tr);
	if (tr->tr_t_gh.gh_gl) {
		gfs2_glock_dq(&tr->tr_t_gh);
		gfs2_holder_uninit(&tr->tr_t_gh);
		if (!tr->tr_attached)
			kfree(tr);
	}
	up_read(&sdp->sd_log_flush_lock);

	if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
		gfs2_log_flush(sdp, NULL);
	sb_end_intwrite(sdp->sd_vfs);
}

static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl,
					       struct buffer_head *bh,
					       const struct gfs2_log_operations *lops)
{
	struct gfs2_bufdata *bd;

	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
	bd->bd_bh = bh;
	bd->bd_gl = gl;
	bd->bd_ops = lops;
	INIT_LIST_HEAD(&bd->bd_list);
	bh->b_private = bd;
	return bd;
}

/**
 * gfs2_trans_add_data - Add a databuf to the transaction.
 * @gl: The inode glock associated with the buffer
 * @bh: The buffer to add
 *
 * This is used in two distinct cases:
 * i) In ordered write mode
 *    We put the data buffer on a list so that we can ensure that its
 *    synced to disk at the right time
 * ii) In journaled data mode
 *    We need to journal the data block in the same way as metadata in
 *    the functions above. The difference is that here we have a tag
 *    which is two __be64's being the block number (as per meta data)
 *    and a flag which says whether the data block needs escaping or
 *    not. This means we need a new log entry for each 251 or so data
 *    blocks, which isn't an enormous overhead but twice as much as
 *    for normal metadata blocks.
 */
void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
{
	struct gfs2_trans *tr = current->journal_info;
	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct address_space *mapping = bh->b_page->mapping;
	struct gfs2_inode *ip = GFS2_I(mapping->host);
	struct gfs2_bufdata *bd;

	if (!gfs2_is_jdata(ip)) {
		gfs2_ordered_add_inode(ip);
		return;
	}

	lock_buffer(bh);
	gfs2_log_lock(sdp);
	bd = bh->b_private;
	if (bd == NULL) {
		gfs2_log_unlock(sdp);
		unlock_buffer(bh);
		if (bh->b_private == NULL)
			bd = gfs2_alloc_bufdata(gl, bh, &gfs2_databuf_lops);
		lock_buffer(bh);
		gfs2_log_lock(sdp);
	}
	gfs2_assert(sdp, bd->bd_gl == gl);
	tr->tr_touched = 1;
	if (list_empty(&bd->bd_list)) {
		set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
		set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
		gfs2_pin(sdp, bd->bd_bh);
		tr->tr_num_databuf_new++;
		sdp->sd_log_num_databuf++;
		list_add_tail(&bd->bd_list, &sdp->sd_log_le_databuf);
	}
	gfs2_log_unlock(sdp);
	unlock_buffer(bh);
}

static void meta_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
{
	struct gfs2_meta_header *mh;
	struct gfs2_trans *tr;

	tr = current->journal_info;
	tr->tr_touched = 1;
	if (!list_empty(&bd->bd_list))
		return;
	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
		printk(KERN_ERR
		       "Attempting to add uninitialised block to journal (inplace block=%lld)\n",
		       (unsigned long long)bd->bd_bh->b_blocknr);
		BUG();
	}
	gfs2_pin(sdp, bd->bd_bh);
	mh->__pad0 = cpu_to_be64(0);
	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
	sdp->sd_log_num_buf++;
	list_add(&bd->bd_list, &sdp->sd_log_le_buf);
	tr->tr_num_buf_new++;
}

void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
{

	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct gfs2_bufdata *bd;

	lock_buffer(bh);
	gfs2_log_lock(sdp);
	bd = bh->b_private;
	if (bd == NULL) {
		gfs2_log_unlock(sdp);
		unlock_buffer(bh);
		lock_page(bh->b_page);
		if (bh->b_private == NULL)
			bd = gfs2_alloc_bufdata(gl, bh, &gfs2_buf_lops);
		unlock_page(bh->b_page);
		lock_buffer(bh);
		gfs2_log_lock(sdp);
	}
	gfs2_assert(sdp, bd->bd_gl == gl);
	meta_lo_add(sdp, bd);
	gfs2_log_unlock(sdp);
	unlock_buffer(bh);
}

void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
{
	struct gfs2_trans *tr = current->journal_info;

	BUG_ON(!list_empty(&bd->bd_list));
	gfs2_add_revoke(sdp, bd);
	tr->tr_touched = 1;
	tr->tr_num_revoke++;
}

void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
{
	struct gfs2_bufdata *bd, *tmp;
	struct gfs2_trans *tr = current->journal_info;
	unsigned int n = len;

	gfs2_log_lock(sdp);
	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
		if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
			list_del_init(&bd->bd_list);
			gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
			sdp->sd_log_num_revoke--;
			kmem_cache_free(gfs2_bufdata_cachep, bd);
			tr->tr_num_revoke_rm++;
			if (--n == 0)
				break;
		}
	}
	gfs2_log_unlock(sdp);
}
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#include <linux/sched.h>
	11	#include <linux/slab.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/completion.h>
	14	#include <linux/buffer_head.h>
d0dc80db	15	#include <linux/kallsyms.h>
f057f6cd	16	#include <linux/gfs2_ondisk.h>
b3b94faa DT	17
b3b94faa DT	18	#include "gfs2.h"
5c676f6d	19	#include "incore.h"
b3b94faa	20	#include "glock.h"
767f433f	21	#include "inode.h"
b3b94faa DT	22	#include "log.h"
	23	#include "lops.h"
	24	#include "meta_io.h"
	25	#include "trans.h"
5c676f6d	26	#include "util.h"
5e687eac	27	#include "trace_gfs2.h"
b3b94faa	28
d0dc80db SW	29	int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
d0dc80db SW	30	unsigned int revokes)
b3b94faa DT	31	{
	32	struct gfs2_trans *tr;
	33	int error;
	34
d0dc80db SW	35	BUG_ON(current->journal_info);
d0dc80db SW	36	BUG_ON(blocks == 0 && revokes == 0);
b3b94faa	37
a1c0643f SW	38	if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
	39	return -EROFS;
	40
f55ab26a	41	tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
b3b94faa DT	42	if (!tr)
	43	return -ENOMEM;
	44
d0dc80db	45	tr->tr_ip = (unsigned long)__builtin_return_address(0);
b3b94faa DT	46	tr->tr_blocks = blocks;
	47	tr->tr_revokes = revokes;
	48	tr->tr_reserved = 1;
	49	if (blocks)
f4154ea0	50	tr->tr_reserved += 6 + blocks;
b3b94faa DT	51	if (revokes)
b3b94faa DT	52	tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
cd915493	53	sizeof(u64));
39263d5e	54	sb_start_intwrite(sdp->sd_vfs);
579b78a4	55	gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
b3b94faa	56
e317ffcb	57	error = gfs2_glock_nq(&tr->tr_t_gh);
b3b94faa	58	if (error)
e317ffcb	59	goto fail_holder_uninit;
b3b94faa	60
b3b94faa DT	61	error = gfs2_log_reserve(sdp, tr->tr_reserved);
	62	if (error)
	63	goto fail_gunlock;
	64
5c676f6d	65	current->journal_info = tr;
b3b94faa DT	66
	67	return 0;
	68
484adff8	69	fail_gunlock:
e317ffcb	70	gfs2_glock_dq(&tr->tr_t_gh);
b3b94faa	71
484adff8	72	fail_holder_uninit:
39263d5e	73	sb_end_intwrite(sdp->sd_vfs);
e317ffcb	74	gfs2_holder_uninit(&tr->tr_t_gh);
b3b94faa DT	75	kfree(tr);
	76
	77	return error;
	78	}
	79
5e687eac BM	80	/**
	81	* gfs2_log_release - Release a given number of log blocks
	82	* @sdp: The GFS2 superblock
	83	* @blks: The number of blocks
	84	*
	85	*/
	86
	87	static void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
	88	{
	89
	90	atomic_add(blks, &sdp->sd_log_blks_free);
	91	trace_gfs2_log_blocks(sdp, blks);
	92	gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
	93	sdp->sd_jdesc->jd_blocks);
	94	up_read(&sdp->sd_log_flush_lock);
	95	}
	96
c50b91c4 SW	97	static void gfs2_print_trans(const struct gfs2_trans *tr)
c50b91c4 SW	98	{
7af584d3 JP	99	printk(KERN_WARNING "GFS2: Transaction created at: %pSR\n",
7af584d3 JP	100	(void *)tr->tr_ip);
c50b91c4 SW	101	printk(KERN_WARNING "GFS2: blocks=%u revokes=%u reserved=%u touched=%d\n",
	102	tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
	103	printk(KERN_WARNING "GFS2: Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
	104	tr->tr_num_buf_new, tr->tr_num_buf_rm,
	105	tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
	106	tr->tr_num_revoke, tr->tr_num_revoke_rm);
	107	}
	108
b3b94faa DT	109	void gfs2_trans_end(struct gfs2_sbd *sdp)
b3b94faa DT	110	{
f4154ea0	111	struct gfs2_trans *tr = current->journal_info;
c50b91c4	112	s64 nbuf;
f4154ea0	113	BUG_ON(!tr);
5c676f6d	114	current->journal_info = NULL;
b3b94faa	115
b3b94faa DT	116	if (!tr->tr_touched) {
b3b94faa DT	117	gfs2_log_release(sdp, tr->tr_reserved);
d8348de0 SW	118	if (tr->tr_t_gh.gh_gl) {
	119	gfs2_glock_dq(&tr->tr_t_gh);
	120	gfs2_holder_uninit(&tr->tr_t_gh);
	121	kfree(tr);
	122	}
39263d5e	123	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	124	return;
	125	}
	126
c50b91c4 SW	127	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	128	nbuf -= tr->tr_num_buf_rm;
	129	nbuf -= tr->tr_num_databuf_rm;
	130
	131	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
	132	(tr->tr_num_revoke <= tr->tr_revokes)))
	133	gfs2_print_trans(tr);
b3b94faa DT	134
b3b94faa DT	135	gfs2_log_commit(sdp, tr);
d8348de0 SW	136	if (tr->tr_t_gh.gh_gl) {
	137	gfs2_glock_dq(&tr->tr_t_gh);
	138	gfs2_holder_uninit(&tr->tr_t_gh);
16ca9412 BM	139	if (!tr->tr_attached)
16ca9412 BM	140	kfree(tr);
d8348de0	141	}
16ca9412	142	up_read(&sdp->sd_log_flush_lock);
b3b94faa DT	143
b3b94faa DT	144	if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
b09e593d	145	gfs2_log_flush(sdp, NULL);
39263d5e	146	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	147	}
b3b94faa DT	148
c76c4d96 SW	149	static struct gfs2_bufdata gfs2_alloc_bufdata(struct gfs2_glock gl,
	150	struct buffer_head *bh,
	151	const struct gfs2_log_operations *lops)
	152	{
	153	struct gfs2_bufdata *bd;
	154
	155	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS \| __GFP_NOFAIL);
	156	bd->bd_bh = bh;
	157	bd->bd_gl = gl;
	158	bd->bd_ops = lops;
	159	INIT_LIST_HEAD(&bd->bd_list);
	160	bh->b_private = bd;
	161	return bd;
	162	}
	163
b3b94faa	164	/**
45138990 SW	165	* gfs2_trans_add_data - Add a databuf to the transaction.
	166	* @gl: The inode glock associated with the buffer
	167	* @bh: The buffer to add
b3b94faa	168	*
767f433f SW	169	* This is used in two distinct cases:
	170	* i) In ordered write mode
	171	* We put the data buffer on a list so that we can ensure that its
	172	* synced to disk at the right time
	173	* ii) In journaled data mode
	174	* We need to journal the data block in the same way as metadata in
	175	* the functions above. The difference is that here we have a tag
	176	* which is two __be64's being the block number (as per meta data)
	177	* and a flag which says whether the data block needs escaping or
	178	* not. This means we need a new log entry for each 251 or so data
	179	* blocks, which isn't an enormous overhead but twice as much as
	180	* for normal metadata blocks.
b3b94faa	181	*/
45138990	182	void gfs2_trans_add_data(struct gfs2_glock gl, struct buffer_head bh)
767f433f SW	183	{
767f433f SW	184	struct gfs2_trans *tr = current->journal_info;
45138990 SW	185	struct gfs2_sbd *sdp = gl->gl_sbd;
45138990 SW	186	struct address_space *mapping = bh->b_page->mapping;
767f433f	187	struct gfs2_inode *ip = GFS2_I(mapping->host);
45138990	188	struct gfs2_bufdata *bd;
767f433f	189
45138990 SW	190	if (!gfs2_is_jdata(ip)) {
45138990 SW	191	gfs2_ordered_add_inode(ip);
767f433f	192	return;
767f433f	193	}
b3b94faa	194
96e5d1d3 BM	195	lock_buffer(bh);
96e5d1d3 BM	196	gfs2_log_lock(sdp);
5c676f6d	197	bd = bh->b_private;
c76c4d96	198	if (bd == NULL) {
96e5d1d3 BM	199	gfs2_log_unlock(sdp);
96e5d1d3 BM	200	unlock_buffer(bh);
c76c4d96 SW	201	if (bh->b_private == NULL)
c76c4d96 SW	202	bd = gfs2_alloc_bufdata(gl, bh, &gfs2_databuf_lops);
96e5d1d3 BM	203	lock_buffer(bh);
96e5d1d3 BM	204	gfs2_log_lock(sdp);
b3b94faa	205	}
c76c4d96	206	gfs2_assert(sdp, bd->bd_gl == gl);
45138990 SW	207	tr->tr_touched = 1;
	208	if (list_empty(&bd->bd_list)) {
	209	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	210	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	211	gfs2_pin(sdp, bd->bd_bh);
	212	tr->tr_num_databuf_new++;
	213	sdp->sd_log_num_databuf++;
	214	list_add_tail(&bd->bd_list, &sdp->sd_log_le_databuf);
	215	}
96e5d1d3 BM	216	gfs2_log_unlock(sdp);
96e5d1d3 BM	217	unlock_buffer(bh);
b3b94faa DT	218	}
b3b94faa DT	219
767f433f	220	static void meta_lo_add(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
350a9b0a	221	{
767f433f SW	222	struct gfs2_meta_header *mh;
	223	struct gfs2_trans *tr;
	224
	225	tr = current->journal_info;
	226	tr->tr_touched = 1;
	227	if (!list_empty(&bd->bd_list))
	228	return;
	229	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	230	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	231	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	232	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
	233	printk(KERN_ERR
	234	"Attempting to add uninitialised block to journal (inplace block=%lld)\n",
	235	(unsigned long long)bd->bd_bh->b_blocknr);
	236	BUG();
	237	}
	238	gfs2_pin(sdp, bd->bd_bh);
	239	mh->__pad0 = cpu_to_be64(0);
	240	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
	241	sdp->sd_log_num_buf++;
	242	list_add(&bd->bd_list, &sdp->sd_log_le_buf);
	243	tr->tr_num_buf_new++;
350a9b0a SW	244	}
	245
	246	void gfs2_trans_add_meta(struct gfs2_glock gl, struct buffer_head bh)
	247	{
767f433f SW	248
	249	struct gfs2_sbd *sdp = gl->gl_sbd;
	250	struct gfs2_bufdata *bd;
	251
	252	lock_buffer(bh);
	253	gfs2_log_lock(sdp);
	254	bd = bh->b_private;
c76c4d96	255	if (bd == NULL) {
767f433f SW	256	gfs2_log_unlock(sdp);
767f433f SW	257	unlock_buffer(bh);
c76c4d96 SW	258	lock_page(bh->b_page);
	259	if (bh->b_private == NULL)
	260	bd = gfs2_alloc_bufdata(gl, bh, &gfs2_buf_lops);
	261	unlock_page(bh->b_page);
767f433f SW	262	lock_buffer(bh);
	263	gfs2_log_lock(sdp);
	264	}
c76c4d96	265	gfs2_assert(sdp, bd->bd_gl == gl);
767f433f SW	266	meta_lo_add(sdp, bd);
	267	gfs2_log_unlock(sdp);
	268	unlock_buffer(bh);
350a9b0a SW	269	}
350a9b0a SW	270
1ad38c43	271	void gfs2_trans_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
b3b94faa	272	{
75f2b879 SW	273	struct gfs2_trans *tr = current->journal_info;
75f2b879 SW	274
c0752aa7	275	BUG_ON(!list_empty(&bd->bd_list));
5d054964	276	gfs2_add_revoke(sdp, bd);
75f2b879 SW	277	tr->tr_touched = 1;
75f2b879 SW	278	tr->tr_num_revoke++;
b3b94faa DT	279	}
b3b94faa DT	280
5731be53	281	void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
b3b94faa	282	{
5731be53 SW	283	struct gfs2_bufdata bd, tmp;
	284	struct gfs2_trans *tr = current->journal_info;
	285	unsigned int n = len;
b3b94faa DT	286
b3b94faa DT	287	gfs2_log_lock(sdp);
c0752aa7	288	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
5731be53	289	if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
c0752aa7	290	list_del_init(&bd->bd_list);
b3b94faa DT	291	gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
b3b94faa DT	292	sdp->sd_log_num_revoke--;
5731be53 SW	293	kmem_cache_free(gfs2_bufdata_cachep, bd);
	294	tr->tr_num_revoke_rm++;
	295	if (--n == 0)
	296	break;
b3b94faa DT	297	}
b3b94faa DT	298	}
b3b94faa	299	gfs2_log_unlock(sdp);
b3b94faa DT	300	}
b3b94faa DT	301