[linux-2.6-block.git] / fs / gfs2 / trans.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 = _RET_IP_;
	tr->tr_blocks = blocks;
	tr->tr_revokes = revokes;
	tr->tr_reserved = 1;
	set_bit(TR_ALLOCED, &tr->tr_flags);
	if (blocks)
		tr->tr_reserved += 6 + blocks;
	if (revokes)
		tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
						   sizeof(u64));
	INIT_LIST_HEAD(&tr->tr_databuf);
	INIT_LIST_HEAD(&tr->tr_buf);

	sb_start_intwrite(sdp->sd_vfs);

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

	current->journal_info = tr;

	return 0;

fail:
	sb_end_intwrite(sdp->sd_vfs);
	kfree(tr);

	return error;
}

static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr)
{
	fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip);
	fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
		tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
		test_bit(TR_TOUCHED, &tr->tr_flags));
	fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %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);
}

void gfs2_trans_end(struct gfs2_sbd *sdp)
{
	struct gfs2_trans *tr = current->journal_info;
	s64 nbuf;
	int alloced = test_bit(TR_ALLOCED, &tr->tr_flags);

	current->journal_info = NULL;

	if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
		gfs2_log_release(sdp, tr->tr_reserved);
		if (alloced) {
			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(sdp, tr);

	gfs2_log_commit(sdp, tr);
	if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags))
		kfree(tr);
	up_read(&sdp->sd_log_flush_lock);

	if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS)
		gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
			       GFS2_LFC_TRANS_END);
	if (alloced)
		sb_end_intwrite(sdp->sd_vfs);
}

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

	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS | __GFP_NOFAIL);
	bd->bd_bh = bh;
	bd->bd_gl = gl;
	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 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_name.ln_sbd;
	struct gfs2_bufdata *bd;

	lock_buffer(bh);
	if (buffer_pinned(bh)) {
		set_bit(TR_TOUCHED, &tr->tr_flags);
		goto out;
	}
	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);
		else
			bd = bh->b_private;
		lock_buffer(bh);
		gfs2_log_lock(sdp);
	}
	gfs2_assert(sdp, bd->bd_gl == gl);
	set_bit(TR_TOUCHED, &tr->tr_flags);
	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++;
		list_add_tail(&bd->bd_list, &tr->tr_databuf);
	}
	gfs2_log_unlock(sdp);
out:
	unlock_buffer(bh);
}

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

	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
	struct gfs2_bufdata *bd;
	struct gfs2_meta_header *mh;
	struct gfs2_trans *tr = current->journal_info;
	enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);

	lock_buffer(bh);
	if (buffer_pinned(bh)) {
		set_bit(TR_TOUCHED, &tr->tr_flags);
		goto out;
	}
	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);
		else
			bd = bh->b_private;
		unlock_page(bh->b_page);
		lock_buffer(bh);
		gfs2_log_lock(sdp);
	}
	gfs2_assert(sdp, bd->bd_gl == gl);
	set_bit(TR_TOUCHED, &tr->tr_flags);
	if (!list_empty(&bd->bd_list))
		goto out_unlock;
	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))) {
		fs_err(sdp, "Attempting to add uninitialised block to "
		       "journal (inplace block=%lld)\n",
		       (unsigned long long)bd->bd_bh->b_blocknr);
		BUG();
	}
	if (unlikely(state == SFS_FROZEN)) {
		fs_info(sdp, "GFS2:adding buf while frozen\n");
		gfs2_assert_withdraw(sdp, 0);
	}
	gfs2_pin(sdp, bd->bd_bh);
	mh->__pad0 = cpu_to_be64(0);
	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
	list_add(&bd->bd_list, &tr->tr_buf);
	tr->tr_num_buf_new++;
out_unlock:
	gfs2_log_unlock(sdp);
out:
	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);
	set_bit(TR_TOUCHED, &tr->tr_flags);
	tr->tr_num_revoke++;
}

void gfs2_trans_remove_revoke(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_revokes, 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--;
			if (--n == 0)
				break;
		}
	}
	gfs2_log_unlock(sdp);
}
Commit	Line	Data
7336d0e6	1	// SPDX-License-Identifier: GPL-2.0-only
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
b3b94faa DT	6
d77d1b58 JP	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d77d1b58 JP	8
b3b94faa DT	9	#include <linux/sched.h>
	10	#include <linux/slab.h>
	11	#include <linux/spinlock.h>
	12	#include <linux/completion.h>
	13	#include <linux/buffer_head.h>
d0dc80db	14	#include <linux/kallsyms.h>
f057f6cd	15	#include <linux/gfs2_ondisk.h>
b3b94faa DT	16
b3b94faa DT	17	#include "gfs2.h"
5c676f6d	18	#include "incore.h"
b3b94faa	19	#include "glock.h"
767f433f	20	#include "inode.h"
b3b94faa DT	21	#include "log.h"
	22	#include "lops.h"
	23	#include "meta_io.h"
	24	#include "trans.h"
5c676f6d	25	#include "util.h"
5e687eac	26	#include "trace_gfs2.h"
b3b94faa	27
d0dc80db SW	28	int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
d0dc80db SW	29	unsigned int revokes)
b3b94faa DT	30	{
	31	struct gfs2_trans *tr;
	32	int error;
	33
d0dc80db SW	34	BUG_ON(current->journal_info);
d0dc80db SW	35	BUG_ON(blocks == 0 && revokes == 0);
b3b94faa	36
a1c0643f SW	37	if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
	38	return -EROFS;
	39
f55ab26a	40	tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
b3b94faa DT	41	if (!tr)
	42	return -ENOMEM;
	43
d29c0afe	44	tr->tr_ip = _RET_IP_;
b3b94faa DT	45	tr->tr_blocks = blocks;
	46	tr->tr_revokes = revokes;
	47	tr->tr_reserved = 1;
9862ca05	48	set_bit(TR_ALLOCED, &tr->tr_flags);
b3b94faa	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));
d69a3c65 SW	54	INIT_LIST_HEAD(&tr->tr_databuf);
	55	INIT_LIST_HEAD(&tr->tr_buf);
	56
39263d5e	57	sb_start_intwrite(sdp->sd_vfs);
b3b94faa	58
b3b94faa DT	59	error = gfs2_log_reserve(sdp, tr->tr_reserved);
b3b94faa DT	60	if (error)
24972557	61	goto fail;
b3b94faa	62
5c676f6d	63	current->journal_info = tr;
b3b94faa DT	64
	65	return 0;
	66
24972557	67	fail:
39263d5e	68	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	69	kfree(tr);
	70
	71	return error;
	72	}
	73
e54c78a2	74	static void gfs2_print_trans(struct gfs2_sbd sdp, const struct gfs2_trans tr)
c50b91c4	75	{
e54c78a2 BP	76	fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip);
e54c78a2 BP	77	fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
9862ca05 BP	78	tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
9862ca05 BP	79	test_bit(TR_TOUCHED, &tr->tr_flags));
e955537e	80	fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u\n",
d77d1b58 JP	81	tr->tr_num_buf_new, tr->tr_num_buf_rm,
d77d1b58 JP	82	tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
e955537e	83	tr->tr_num_revoke);
c50b91c4 SW	84	}
c50b91c4 SW	85
b3b94faa DT	86	void gfs2_trans_end(struct gfs2_sbd *sdp)
b3b94faa DT	87	{
f4154ea0	88	struct gfs2_trans *tr = current->journal_info;
c50b91c4	89	s64 nbuf;
9862ca05	90	int alloced = test_bit(TR_ALLOCED, &tr->tr_flags);
2e60d768	91
5c676f6d	92	current->journal_info = NULL;
b3b94faa	93
9862ca05	94	if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
b3b94faa	95	gfs2_log_release(sdp, tr->tr_reserved);
2e60d768	96	if (alloced) {
d8348de0	97	kfree(tr);
2e60d768 BM	98	sb_end_intwrite(sdp->sd_vfs);
2e60d768 BM	99	}
b3b94faa DT	100	return;
	101	}
	102
c50b91c4 SW	103	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	104	nbuf -= tr->tr_num_buf_rm;
	105	nbuf -= tr->tr_num_databuf_rm;
	106
	107	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
	108	(tr->tr_num_revoke <= tr->tr_revokes)))
e54c78a2	109	gfs2_print_trans(sdp, tr);
b3b94faa DT	110
b3b94faa DT	111	gfs2_log_commit(sdp, tr);
9862ca05 BP	112	if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags))
9862ca05 BP	113	kfree(tr);
16ca9412	114	up_read(&sdp->sd_log_flush_lock);
b3b94faa	115
1751e8a6	116	if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS)
805c0907 BP	117	gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL \|
805c0907 BP	118	GFS2_LFC_TRANS_END);
2e60d768 BM	119	if (alloced)
2e60d768 BM	120	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	121	}
b3b94faa DT	122
c76c4d96	123	static struct gfs2_bufdata gfs2_alloc_bufdata(struct gfs2_glock gl,
cbbe76c8	124	struct buffer_head *bh)
c76c4d96 SW	125	{
	126	struct gfs2_bufdata *bd;
	127
	128	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS \| __GFP_NOFAIL);
	129	bd->bd_bh = bh;
	130	bd->bd_gl = gl;
c76c4d96 SW	131	INIT_LIST_HEAD(&bd->bd_list);
	132	bh->b_private = bd;
	133	return bd;
	134	}
	135
b3b94faa	136	/**
45138990 SW	137	* gfs2_trans_add_data - Add a databuf to the transaction.
	138	* @gl: The inode glock associated with the buffer
	139	* @bh: The buffer to add
b3b94faa	140	*
845802b1 AG	141	* This is used in journaled data mode.
	142	* We need to journal the data block in the same way as metadata in
	143	* the functions above. The difference is that here we have a tag
	144	* which is two __be64's being the block number (as per meta data)
	145	* and a flag which says whether the data block needs escaping or
	146	* not. This means we need a new log entry for each 251 or so data
	147	* blocks, which isn't an enormous overhead but twice as much as
	148	* for normal metadata blocks.
b3b94faa	149	*/
45138990	150	void gfs2_trans_add_data(struct gfs2_glock gl, struct buffer_head bh)
767f433f SW	151	{
767f433f SW	152	struct gfs2_trans *tr = current->journal_info;
15562c43	153	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
45138990	154	struct gfs2_bufdata *bd;
767f433f	155
96e5d1d3	156	lock_buffer(bh);
aacee720 BP	157	if (buffer_pinned(bh)) {
	158	set_bit(TR_TOUCHED, &tr->tr_flags);
	159	goto out;
	160	}
96e5d1d3	161	gfs2_log_lock(sdp);
5c676f6d	162	bd = bh->b_private;
c76c4d96	163	if (bd == NULL) {
96e5d1d3 BM	164	gfs2_log_unlock(sdp);
96e5d1d3 BM	165	unlock_buffer(bh);
c76c4d96	166	if (bh->b_private == NULL)
cbbe76c8	167	bd = gfs2_alloc_bufdata(gl, bh);
491e94f7 BP	168	else
491e94f7 BP	169	bd = bh->b_private;
96e5d1d3 BM	170	lock_buffer(bh);
96e5d1d3 BM	171	gfs2_log_lock(sdp);
b3b94faa	172	}
c76c4d96	173	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	174	set_bit(TR_TOUCHED, &tr->tr_flags);
45138990 SW	175	if (list_empty(&bd->bd_list)) {
	176	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	177	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	178	gfs2_pin(sdp, bd->bd_bh);
	179	tr->tr_num_databuf_new++;
d69a3c65	180	list_add_tail(&bd->bd_list, &tr->tr_databuf);
45138990	181	}
96e5d1d3	182	gfs2_log_unlock(sdp);
aacee720	183	out:
96e5d1d3	184	unlock_buffer(bh);
b3b94faa DT	185	}
b3b94faa DT	186
192738b7	187	void gfs2_trans_add_meta(struct gfs2_glock gl, struct buffer_head bh)
350a9b0a	188	{
192738b7 BP	189
	190	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
	191	struct gfs2_bufdata *bd;
767f433f	192	struct gfs2_meta_header *mh;
aacee720	193	struct gfs2_trans *tr = current->journal_info;
2e60d768	194	enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
767f433f	195
192738b7	196	lock_buffer(bh);
aacee720 BP	197	if (buffer_pinned(bh)) {
	198	set_bit(TR_TOUCHED, &tr->tr_flags);
	199	goto out;
	200	}
192738b7 BP	201	gfs2_log_lock(sdp);
	202	bd = bh->b_private;
	203	if (bd == NULL) {
	204	gfs2_log_unlock(sdp);
	205	unlock_buffer(bh);
	206	lock_page(bh->b_page);
	207	if (bh->b_private == NULL)
cbbe76c8	208	bd = gfs2_alloc_bufdata(gl, bh);
192738b7 BP	209	else
	210	bd = bh->b_private;
	211	unlock_page(bh->b_page);
	212	lock_buffer(bh);
	213	gfs2_log_lock(sdp);
	214	}
	215	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	216	set_bit(TR_TOUCHED, &tr->tr_flags);
767f433f	217	if (!list_empty(&bd->bd_list))
192738b7	218	goto out_unlock;
767f433f SW	219	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	220	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	221	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	222	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
e54c78a2 BP	223	fs_err(sdp, "Attempting to add uninitialised block to "
e54c78a2 BP	224	"journal (inplace block=%lld)\n",
767f433f SW	225	(unsigned long long)bd->bd_bh->b_blocknr);
	226	BUG();
	227	}
2e60d768	228	if (unlikely(state == SFS_FROZEN)) {
e54c78a2	229	fs_info(sdp, "GFS2:adding buf while frozen\n");
2e60d768 BM	230	gfs2_assert_withdraw(sdp, 0);
2e60d768 BM	231	}
767f433f SW	232	gfs2_pin(sdp, bd->bd_bh);
	233	mh->__pad0 = cpu_to_be64(0);
	234	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
d69a3c65	235	list_add(&bd->bd_list, &tr->tr_buf);
767f433f	236	tr->tr_num_buf_new++;
192738b7	237	out_unlock:
767f433f	238	gfs2_log_unlock(sdp);
aacee720	239	out:
767f433f	240	unlock_buffer(bh);
350a9b0a SW	241	}
350a9b0a SW	242
1ad38c43	243	void gfs2_trans_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
b3b94faa	244	{
75f2b879 SW	245	struct gfs2_trans *tr = current->journal_info;
75f2b879 SW	246
c0752aa7	247	BUG_ON(!list_empty(&bd->bd_list));
5d054964	248	gfs2_add_revoke(sdp, bd);
9862ca05	249	set_bit(TR_TOUCHED, &tr->tr_flags);
75f2b879	250	tr->tr_num_revoke++;
b3b94faa DT	251	}
b3b94faa DT	252
fbb27873	253	void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
b3b94faa	254	{
5731be53 SW	255	struct gfs2_bufdata bd, tmp;
	256	struct gfs2_trans *tr = current->journal_info;
	257	unsigned int n = len;
b3b94faa DT	258
b3b94faa DT	259	gfs2_log_lock(sdp);
a5b1d3fc	260	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) {
5731be53	261	if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
c0752aa7	262	list_del_init(&bd->bd_list);
b3b94faa DT	263	gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
b3b94faa DT	264	sdp->sd_log_num_revoke--;
5731be53	265	kmem_cache_free(gfs2_bufdata_cachep, bd);
e955537e	266	tr->tr_num_revoke--;
5731be53 SW	267	if (--n == 0)
5731be53 SW	268	break;
b3b94faa DT	269	}
b3b94faa DT	270	}
b3b94faa	271	gfs2_log_unlock(sdp);
b3b94faa DT	272	}
b3b94faa DT	273