[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.
 */

#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/%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;
	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_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	*/
b3b94faa DT	9
d77d1b58 JP	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d77d1b58 JP	11
b3b94faa DT	12	#include <linux/sched.h>
	13	#include <linux/slab.h>
	14	#include <linux/spinlock.h>
	15	#include <linux/completion.h>
	16	#include <linux/buffer_head.h>
d0dc80db	17	#include <linux/kallsyms.h>
f057f6cd	18	#include <linux/gfs2_ondisk.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d	21	#include "incore.h"
b3b94faa	22	#include "glock.h"
767f433f	23	#include "inode.h"
b3b94faa DT	24	#include "log.h"
	25	#include "lops.h"
	26	#include "meta_io.h"
	27	#include "trans.h"
5c676f6d	28	#include "util.h"
5e687eac	29	#include "trace_gfs2.h"
b3b94faa	30
d0dc80db SW	31	int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
d0dc80db SW	32	unsigned int revokes)
b3b94faa DT	33	{
	34	struct gfs2_trans *tr;
	35	int error;
	36
d0dc80db SW	37	BUG_ON(current->journal_info);
d0dc80db SW	38	BUG_ON(blocks == 0 && revokes == 0);
b3b94faa	39
a1c0643f SW	40	if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
	41	return -EROFS;
	42
f55ab26a	43	tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
b3b94faa DT	44	if (!tr)
	45	return -ENOMEM;
	46
d29c0afe	47	tr->tr_ip = _RET_IP_;
b3b94faa DT	48	tr->tr_blocks = blocks;
	49	tr->tr_revokes = revokes;
	50	tr->tr_reserved = 1;
9862ca05	51	set_bit(TR_ALLOCED, &tr->tr_flags);
b3b94faa	52	if (blocks)
f4154ea0	53	tr->tr_reserved += 6 + blocks;
b3b94faa DT	54	if (revokes)
b3b94faa DT	55	tr->tr_reserved += gfs2_struct2blk(sdp, revokes,
cd915493	56	sizeof(u64));
d69a3c65 SW	57	INIT_LIST_HEAD(&tr->tr_databuf);
	58	INIT_LIST_HEAD(&tr->tr_buf);
	59
39263d5e	60	sb_start_intwrite(sdp->sd_vfs);
b3b94faa	61
b3b94faa DT	62	error = gfs2_log_reserve(sdp, tr->tr_reserved);
b3b94faa DT	63	if (error)
24972557	64	goto fail;
b3b94faa	65
5c676f6d	66	current->journal_info = tr;
b3b94faa DT	67
	68	return 0;
	69
24972557	70	fail:
39263d5e	71	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	72	kfree(tr);
	73
	74	return error;
	75	}
	76
e54c78a2	77	static void gfs2_print_trans(struct gfs2_sbd sdp, const struct gfs2_trans tr)
c50b91c4	78	{
e54c78a2 BP	79	fs_warn(sdp, "Transaction created at: %pSR\n", (void *)tr->tr_ip);
e54c78a2 BP	80	fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
9862ca05 BP	81	tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
9862ca05 BP	82	test_bit(TR_TOUCHED, &tr->tr_flags));
e54c78a2	83	fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
d77d1b58 JP	84	tr->tr_num_buf_new, tr->tr_num_buf_rm,
	85	tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
	86	tr->tr_num_revoke, tr->tr_num_revoke_rm);
c50b91c4 SW	87	}
c50b91c4 SW	88
b3b94faa DT	89	void gfs2_trans_end(struct gfs2_sbd *sdp)
b3b94faa DT	90	{
f4154ea0	91	struct gfs2_trans *tr = current->journal_info;
c50b91c4	92	s64 nbuf;
9862ca05	93	int alloced = test_bit(TR_ALLOCED, &tr->tr_flags);
2e60d768	94
5c676f6d	95	current->journal_info = NULL;
b3b94faa	96
9862ca05	97	if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
b3b94faa	98	gfs2_log_release(sdp, tr->tr_reserved);
2e60d768	99	if (alloced) {
d8348de0	100	kfree(tr);
2e60d768 BM	101	sb_end_intwrite(sdp->sd_vfs);
2e60d768 BM	102	}
b3b94faa DT	103	return;
	104	}
	105
c50b91c4 SW	106	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	107	nbuf -= tr->tr_num_buf_rm;
	108	nbuf -= tr->tr_num_databuf_rm;
	109
	110	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
	111	(tr->tr_num_revoke <= tr->tr_revokes)))
e54c78a2	112	gfs2_print_trans(sdp, tr);
b3b94faa DT	113
b3b94faa DT	114	gfs2_log_commit(sdp, tr);
9862ca05 BP	115	if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags))
9862ca05 BP	116	kfree(tr);
16ca9412	117	up_read(&sdp->sd_log_flush_lock);
b3b94faa	118
1751e8a6	119	if (sdp->sd_vfs->s_flags & SB_SYNCHRONOUS)
805c0907 BP	120	gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL \|
805c0907 BP	121	GFS2_LFC_TRANS_END);
2e60d768 BM	122	if (alloced)
2e60d768 BM	123	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	124	}
b3b94faa DT	125
c76c4d96	126	static struct gfs2_bufdata gfs2_alloc_bufdata(struct gfs2_glock gl,
cbbe76c8	127	struct buffer_head *bh)
c76c4d96 SW	128	{
	129	struct gfs2_bufdata *bd;
	130
	131	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS \| __GFP_NOFAIL);
	132	bd->bd_bh = bh;
	133	bd->bd_gl = gl;
c76c4d96 SW	134	INIT_LIST_HEAD(&bd->bd_list);
	135	bh->b_private = bd;
	136	return bd;
	137	}
	138
b3b94faa	139	/**
45138990 SW	140	* gfs2_trans_add_data - Add a databuf to the transaction.
	141	* @gl: The inode glock associated with the buffer
	142	* @bh: The buffer to add
b3b94faa	143	*
845802b1 AG	144	* This is used in journaled data mode.
	145	* We need to journal the data block in the same way as metadata in
	146	* the functions above. The difference is that here we have a tag
	147	* which is two __be64's being the block number (as per meta data)
	148	* and a flag which says whether the data block needs escaping or
	149	* not. This means we need a new log entry for each 251 or so data
	150	* blocks, which isn't an enormous overhead but twice as much as
	151	* for normal metadata blocks.
b3b94faa	152	*/
45138990	153	void gfs2_trans_add_data(struct gfs2_glock gl, struct buffer_head bh)
767f433f SW	154	{
767f433f SW	155	struct gfs2_trans *tr = current->journal_info;
15562c43	156	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
45138990	157	struct gfs2_bufdata *bd;
767f433f	158
96e5d1d3	159	lock_buffer(bh);
aacee720 BP	160	if (buffer_pinned(bh)) {
	161	set_bit(TR_TOUCHED, &tr->tr_flags);
	162	goto out;
	163	}
96e5d1d3	164	gfs2_log_lock(sdp);
5c676f6d	165	bd = bh->b_private;
c76c4d96	166	if (bd == NULL) {
96e5d1d3 BM	167	gfs2_log_unlock(sdp);
96e5d1d3 BM	168	unlock_buffer(bh);
c76c4d96	169	if (bh->b_private == NULL)
cbbe76c8	170	bd = gfs2_alloc_bufdata(gl, bh);
491e94f7 BP	171	else
491e94f7 BP	172	bd = bh->b_private;
96e5d1d3 BM	173	lock_buffer(bh);
96e5d1d3 BM	174	gfs2_log_lock(sdp);
b3b94faa	175	}
c76c4d96	176	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	177	set_bit(TR_TOUCHED, &tr->tr_flags);
45138990 SW	178	if (list_empty(&bd->bd_list)) {
	179	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	180	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	181	gfs2_pin(sdp, bd->bd_bh);
	182	tr->tr_num_databuf_new++;
d69a3c65	183	list_add_tail(&bd->bd_list, &tr->tr_databuf);
45138990	184	}
96e5d1d3	185	gfs2_log_unlock(sdp);
aacee720	186	out:
96e5d1d3	187	unlock_buffer(bh);
b3b94faa DT	188	}
b3b94faa DT	189
192738b7	190	void gfs2_trans_add_meta(struct gfs2_glock gl, struct buffer_head bh)
350a9b0a	191	{
192738b7 BP	192
	193	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
	194	struct gfs2_bufdata *bd;
767f433f	195	struct gfs2_meta_header *mh;
aacee720	196	struct gfs2_trans *tr = current->journal_info;
2e60d768	197	enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
767f433f	198
192738b7	199	lock_buffer(bh);
aacee720 BP	200	if (buffer_pinned(bh)) {
	201	set_bit(TR_TOUCHED, &tr->tr_flags);
	202	goto out;
	203	}
192738b7 BP	204	gfs2_log_lock(sdp);
	205	bd = bh->b_private;
	206	if (bd == NULL) {
	207	gfs2_log_unlock(sdp);
	208	unlock_buffer(bh);
	209	lock_page(bh->b_page);
	210	if (bh->b_private == NULL)
cbbe76c8	211	bd = gfs2_alloc_bufdata(gl, bh);
192738b7 BP	212	else
	213	bd = bh->b_private;
	214	unlock_page(bh->b_page);
	215	lock_buffer(bh);
	216	gfs2_log_lock(sdp);
	217	}
	218	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	219	set_bit(TR_TOUCHED, &tr->tr_flags);
767f433f	220	if (!list_empty(&bd->bd_list))
192738b7	221	goto out_unlock;
767f433f SW	222	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	223	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	224	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	225	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
e54c78a2 BP	226	fs_err(sdp, "Attempting to add uninitialised block to "
e54c78a2 BP	227	"journal (inplace block=%lld)\n",
767f433f SW	228	(unsigned long long)bd->bd_bh->b_blocknr);
	229	BUG();
	230	}
2e60d768	231	if (unlikely(state == SFS_FROZEN)) {
e54c78a2	232	fs_info(sdp, "GFS2:adding buf while frozen\n");
2e60d768 BM	233	gfs2_assert_withdraw(sdp, 0);
2e60d768 BM	234	}
767f433f SW	235	gfs2_pin(sdp, bd->bd_bh);
	236	mh->__pad0 = cpu_to_be64(0);
	237	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
d69a3c65	238	list_add(&bd->bd_list, &tr->tr_buf);
767f433f	239	tr->tr_num_buf_new++;
192738b7	240	out_unlock:
767f433f	241	gfs2_log_unlock(sdp);
aacee720	242	out:
767f433f	243	unlock_buffer(bh);
350a9b0a SW	244	}
350a9b0a SW	245
1ad38c43	246	void gfs2_trans_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
b3b94faa	247	{
75f2b879 SW	248	struct gfs2_trans *tr = current->journal_info;
75f2b879 SW	249
c0752aa7	250	BUG_ON(!list_empty(&bd->bd_list));
5d054964	251	gfs2_add_revoke(sdp, bd);
9862ca05	252	set_bit(TR_TOUCHED, &tr->tr_flags);
75f2b879	253	tr->tr_num_revoke++;
b3b94faa DT	254	}
b3b94faa DT	255
5731be53	256	void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
b3b94faa	257	{
5731be53 SW	258	struct gfs2_bufdata bd, tmp;
	259	struct gfs2_trans *tr = current->journal_info;
	260	unsigned int n = len;
b3b94faa DT	261
b3b94faa DT	262	gfs2_log_lock(sdp);
c0752aa7	263	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
5731be53	264	if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
c0752aa7	265	list_del_init(&bd->bd_list);
b3b94faa DT	266	gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
b3b94faa DT	267	sdp->sd_log_num_revoke--;
5731be53 SW	268	kmem_cache_free(gfs2_bufdata_cachep, bd);
	269	tr->tr_num_revoke_rm++;
	270	if (--n == 0)
	271	break;
b3b94faa DT	272	}
b3b94faa DT	273	}
b3b94faa	274	gfs2_log_unlock(sdp);
b3b94faa DT	275	}
b3b94faa DT	276