[mirror_ubuntu-artful-kernel.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));
	INIT_LIST_HEAD(&tr->tr_databuf);
	INIT_LIST_HEAD(&tr->tr_buf);

	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)
{
	pr_warn("GFS2: Transaction created at: %pSR\n", (void *)tr->tr_ip);
	pr_warn("GFS2: blocks=%u revokes=%u reserved=%u touched=%u\n",
	       tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
	pr_warn("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++;
		list_add_tail(&bd->bd_list, &tr->tr_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))) {
		pr_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);
	list_add(&bd->bd_list, &tr->tr_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));
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);
579b78a4	58	gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh);
b3b94faa	59
e317ffcb	60	error = gfs2_glock_nq(&tr->tr_t_gh);
b3b94faa	61	if (error)
e317ffcb	62	goto fail_holder_uninit;
b3b94faa	63
b3b94faa DT	64	error = gfs2_log_reserve(sdp, tr->tr_reserved);
	65	if (error)
	66	goto fail_gunlock;
	67
5c676f6d	68	current->journal_info = tr;
b3b94faa DT	69
	70	return 0;
	71
484adff8	72	fail_gunlock:
e317ffcb	73	gfs2_glock_dq(&tr->tr_t_gh);
b3b94faa	74
484adff8	75	fail_holder_uninit:
39263d5e	76	sb_end_intwrite(sdp->sd_vfs);
e317ffcb	77	gfs2_holder_uninit(&tr->tr_t_gh);
b3b94faa DT	78	kfree(tr);
	79
	80	return error;
	81	}
	82
5e687eac BM	83	/**
	84	* gfs2_log_release - Release a given number of log blocks
	85	* @sdp: The GFS2 superblock
	86	* @blks: The number of blocks
	87	*
	88	*/
	89
	90	static void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
	91	{
	92
	93	atomic_add(blks, &sdp->sd_log_blks_free);
	94	trace_gfs2_log_blocks(sdp, blks);
	95	gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
	96	sdp->sd_jdesc->jd_blocks);
	97	up_read(&sdp->sd_log_flush_lock);
	98	}
	99
c50b91c4 SW	100	static void gfs2_print_trans(const struct gfs2_trans *tr)
c50b91c4 SW	101	{
fc554ed3 FF	102	pr_warn("GFS2: Transaction created at: %pSR\n", (void *)tr->tr_ip);
fc554ed3 FF	103	pr_warn("GFS2: blocks=%u revokes=%u reserved=%u touched=%u\n",
c50b91c4	104	tr->tr_blocks, tr->tr_revokes, tr->tr_reserved, tr->tr_touched);
fc554ed3	105	pr_warn("GFS2: Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
c50b91c4 SW	106	tr->tr_num_buf_new, tr->tr_num_buf_rm,
	107	tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
	108	tr->tr_num_revoke, tr->tr_num_revoke_rm);
	109	}
	110
b3b94faa DT	111	void gfs2_trans_end(struct gfs2_sbd *sdp)
b3b94faa DT	112	{
f4154ea0	113	struct gfs2_trans *tr = current->journal_info;
c50b91c4	114	s64 nbuf;
f4154ea0	115	BUG_ON(!tr);
5c676f6d	116	current->journal_info = NULL;
b3b94faa	117
b3b94faa DT	118	if (!tr->tr_touched) {
b3b94faa DT	119	gfs2_log_release(sdp, tr->tr_reserved);
d8348de0 SW	120	if (tr->tr_t_gh.gh_gl) {
	121	gfs2_glock_dq(&tr->tr_t_gh);
	122	gfs2_holder_uninit(&tr->tr_t_gh);
	123	kfree(tr);
	124	}
39263d5e	125	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	126	return;
	127	}
	128
c50b91c4 SW	129	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	130	nbuf -= tr->tr_num_buf_rm;
	131	nbuf -= tr->tr_num_databuf_rm;
	132
	133	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
	134	(tr->tr_num_revoke <= tr->tr_revokes)))
	135	gfs2_print_trans(tr);
b3b94faa DT	136
b3b94faa DT	137	gfs2_log_commit(sdp, tr);
d8348de0 SW	138	if (tr->tr_t_gh.gh_gl) {
	139	gfs2_glock_dq(&tr->tr_t_gh);
	140	gfs2_holder_uninit(&tr->tr_t_gh);
16ca9412 BM	141	if (!tr->tr_attached)
16ca9412 BM	142	kfree(tr);
d8348de0	143	}
16ca9412	144	up_read(&sdp->sd_log_flush_lock);
b3b94faa DT	145
b3b94faa DT	146	if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
b09e593d	147	gfs2_log_flush(sdp, NULL);
39263d5e	148	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	149	}
b3b94faa DT	150
c76c4d96 SW	151	static struct gfs2_bufdata gfs2_alloc_bufdata(struct gfs2_glock gl,
	152	struct buffer_head *bh,
	153	const struct gfs2_log_operations *lops)
	154	{
	155	struct gfs2_bufdata *bd;
	156
	157	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS \| __GFP_NOFAIL);
	158	bd->bd_bh = bh;
	159	bd->bd_gl = gl;
	160	bd->bd_ops = lops;
	161	INIT_LIST_HEAD(&bd->bd_list);
	162	bh->b_private = bd;
	163	return bd;
	164	}
	165
b3b94faa	166	/**
45138990 SW	167	* gfs2_trans_add_data - Add a databuf to the transaction.
	168	* @gl: The inode glock associated with the buffer
	169	* @bh: The buffer to add
b3b94faa	170	*
767f433f SW	171	* This is used in two distinct cases:
	172	* i) In ordered write mode
	173	* We put the data buffer on a list so that we can ensure that its
	174	* synced to disk at the right time
	175	* ii) In journaled data mode
	176	* We need to journal the data block in the same way as metadata in
	177	* the functions above. The difference is that here we have a tag
	178	* which is two __be64's being the block number (as per meta data)
	179	* and a flag which says whether the data block needs escaping or
	180	* not. This means we need a new log entry for each 251 or so data
	181	* blocks, which isn't an enormous overhead but twice as much as
	182	* for normal metadata blocks.
b3b94faa	183	*/
45138990	184	void gfs2_trans_add_data(struct gfs2_glock gl, struct buffer_head bh)
767f433f SW	185	{
767f433f SW	186	struct gfs2_trans *tr = current->journal_info;
45138990 SW	187	struct gfs2_sbd *sdp = gl->gl_sbd;
45138990 SW	188	struct address_space *mapping = bh->b_page->mapping;
767f433f	189	struct gfs2_inode *ip = GFS2_I(mapping->host);
45138990	190	struct gfs2_bufdata *bd;
767f433f	191
45138990 SW	192	if (!gfs2_is_jdata(ip)) {
45138990 SW	193	gfs2_ordered_add_inode(ip);
767f433f	194	return;
767f433f	195	}
b3b94faa	196
96e5d1d3 BM	197	lock_buffer(bh);
96e5d1d3 BM	198	gfs2_log_lock(sdp);
5c676f6d	199	bd = bh->b_private;
c76c4d96	200	if (bd == NULL) {
96e5d1d3 BM	201	gfs2_log_unlock(sdp);
96e5d1d3 BM	202	unlock_buffer(bh);
c76c4d96 SW	203	if (bh->b_private == NULL)
c76c4d96 SW	204	bd = gfs2_alloc_bufdata(gl, bh, &gfs2_databuf_lops);
96e5d1d3 BM	205	lock_buffer(bh);
96e5d1d3 BM	206	gfs2_log_lock(sdp);
b3b94faa	207	}
c76c4d96	208	gfs2_assert(sdp, bd->bd_gl == gl);
45138990 SW	209	tr->tr_touched = 1;
	210	if (list_empty(&bd->bd_list)) {
	211	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	212	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	213	gfs2_pin(sdp, bd->bd_bh);
	214	tr->tr_num_databuf_new++;
d69a3c65	215	list_add_tail(&bd->bd_list, &tr->tr_databuf);
45138990	216	}
96e5d1d3 BM	217	gfs2_log_unlock(sdp);
96e5d1d3 BM	218	unlock_buffer(bh);
b3b94faa DT	219	}
b3b94faa DT	220
767f433f	221	static void meta_lo_add(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
350a9b0a	222	{
767f433f SW	223	struct gfs2_meta_header *mh;
	224	struct gfs2_trans *tr;
	225
	226	tr = current->journal_info;
	227	tr->tr_touched = 1;
	228	if (!list_empty(&bd->bd_list))
	229	return;
	230	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	231	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	232	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	233	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
fc554ed3 FF	234	pr_err("Attempting to add uninitialised block to journal "
fc554ed3 FF	235	"(inplace block=%lld)\n",
767f433f SW	236	(unsigned long long)bd->bd_bh->b_blocknr);
	237	BUG();
	238	}
	239	gfs2_pin(sdp, bd->bd_bh);
	240	mh->__pad0 = cpu_to_be64(0);
	241	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
d69a3c65	242	list_add(&bd->bd_list, &tr->tr_buf);
767f433f	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