[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.
 */

#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(const struct gfs2_trans *tr)
{
	pr_warn("Transaction created at: %pSR\n", (void *)tr->tr_ip);
	pr_warn("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));
	pr_warn("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);

	BUG_ON(!tr);
	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(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 & MS_SYNCHRONOUS)
		gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
	if (alloced)
		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_name.ln_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);
	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, &gfs2_databuf_lops);
		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, &gfs2_buf_lops);
		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))) {
		pr_err("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)) {
		printk(KERN_INFO "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
c50b91c4 SW	77	static void gfs2_print_trans(const struct gfs2_trans *tr)
c50b91c4 SW	78	{
d77d1b58 JP	79	pr_warn("Transaction created at: %pSR\n", (void *)tr->tr_ip);
d77d1b58 JP	80	pr_warn("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));
d77d1b58 JP	83	pr_warn("Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
	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
f4154ea0	95	BUG_ON(!tr);
5c676f6d	96	current->journal_info = NULL;
b3b94faa	97
9862ca05	98	if (!test_bit(TR_TOUCHED, &tr->tr_flags)) {
b3b94faa	99	gfs2_log_release(sdp, tr->tr_reserved);
2e60d768	100	if (alloced) {
d8348de0	101	kfree(tr);
2e60d768 BM	102	sb_end_intwrite(sdp->sd_vfs);
2e60d768 BM	103	}
b3b94faa DT	104	return;
	105	}
	106
c50b91c4 SW	107	nbuf = tr->tr_num_buf_new + tr->tr_num_databuf_new;
	108	nbuf -= tr->tr_num_buf_rm;
	109	nbuf -= tr->tr_num_databuf_rm;
	110
	111	if (gfs2_assert_withdraw(sdp, (nbuf <= tr->tr_blocks) &&
	112	(tr->tr_num_revoke <= tr->tr_revokes)))
	113	gfs2_print_trans(tr);
b3b94faa DT	114
b3b94faa DT	115	gfs2_log_commit(sdp, tr);
9862ca05 BP	116	if (alloced && !test_bit(TR_ATTACHED, &tr->tr_flags))
9862ca05 BP	117	kfree(tr);
16ca9412	118	up_read(&sdp->sd_log_flush_lock);
b3b94faa DT	119
b3b94faa DT	120	if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS)
24972557	121	gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
2e60d768 BM	122	if (alloced)
2e60d768 BM	123	sb_end_intwrite(sdp->sd_vfs);
b3b94faa DT	124	}
b3b94faa DT	125
c76c4d96 SW	126	static struct gfs2_bufdata gfs2_alloc_bufdata(struct gfs2_glock gl,
	127	struct buffer_head *bh,
	128	const struct gfs2_log_operations *lops)
	129	{
	130	struct gfs2_bufdata *bd;
	131
	132	bd = kmem_cache_zalloc(gfs2_bufdata_cachep, GFP_NOFS \| __GFP_NOFAIL);
	133	bd->bd_bh = bh;
	134	bd->bd_gl = gl;
	135	bd->bd_ops = lops;
	136	INIT_LIST_HEAD(&bd->bd_list);
	137	bh->b_private = bd;
	138	return bd;
	139	}
	140
b3b94faa	141	/**
45138990 SW	142	* gfs2_trans_add_data - Add a databuf to the transaction.
	143	* @gl: The inode glock associated with the buffer
	144	* @bh: The buffer to add
b3b94faa	145	*
767f433f SW	146	* This is used in two distinct cases:
	147	* i) In ordered write mode
	148	* We put the data buffer on a list so that we can ensure that its
	149	* synced to disk at the right time
	150	* ii) In journaled data mode
	151	* We need to journal the data block in the same way as metadata in
	152	* the functions above. The difference is that here we have a tag
	153	* which is two __be64's being the block number (as per meta data)
	154	* and a flag which says whether the data block needs escaping or
	155	* not. This means we need a new log entry for each 251 or so data
	156	* blocks, which isn't an enormous overhead but twice as much as
	157	* for normal metadata blocks.
b3b94faa	158	*/
45138990	159	void gfs2_trans_add_data(struct gfs2_glock gl, struct buffer_head bh)
767f433f SW	160	{
767f433f SW	161	struct gfs2_trans *tr = current->journal_info;
15562c43	162	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
45138990	163	struct address_space *mapping = bh->b_page->mapping;
767f433f	164	struct gfs2_inode *ip = GFS2_I(mapping->host);
45138990	165	struct gfs2_bufdata *bd;
767f433f	166
45138990 SW	167	if (!gfs2_is_jdata(ip)) {
45138990 SW	168	gfs2_ordered_add_inode(ip);
767f433f	169	return;
767f433f	170	}
b3b94faa	171
96e5d1d3	172	lock_buffer(bh);
aacee720 BP	173	if (buffer_pinned(bh)) {
	174	set_bit(TR_TOUCHED, &tr->tr_flags);
	175	goto out;
	176	}
96e5d1d3	177	gfs2_log_lock(sdp);
5c676f6d	178	bd = bh->b_private;
c76c4d96	179	if (bd == NULL) {
96e5d1d3 BM	180	gfs2_log_unlock(sdp);
96e5d1d3 BM	181	unlock_buffer(bh);
c76c4d96 SW	182	if (bh->b_private == NULL)
c76c4d96 SW	183	bd = gfs2_alloc_bufdata(gl, bh, &gfs2_databuf_lops);
491e94f7 BP	184	else
491e94f7 BP	185	bd = bh->b_private;
96e5d1d3 BM	186	lock_buffer(bh);
96e5d1d3 BM	187	gfs2_log_lock(sdp);
b3b94faa	188	}
c76c4d96	189	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	190	set_bit(TR_TOUCHED, &tr->tr_flags);
45138990 SW	191	if (list_empty(&bd->bd_list)) {
	192	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	193	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	194	gfs2_pin(sdp, bd->bd_bh);
	195	tr->tr_num_databuf_new++;
d69a3c65	196	list_add_tail(&bd->bd_list, &tr->tr_databuf);
45138990	197	}
96e5d1d3	198	gfs2_log_unlock(sdp);
aacee720	199	out:
96e5d1d3	200	unlock_buffer(bh);
b3b94faa DT	201	}
b3b94faa DT	202
192738b7	203	void gfs2_trans_add_meta(struct gfs2_glock gl, struct buffer_head bh)
350a9b0a	204	{
192738b7 BP	205
	206	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
	207	struct gfs2_bufdata *bd;
767f433f	208	struct gfs2_meta_header *mh;
aacee720	209	struct gfs2_trans *tr = current->journal_info;
2e60d768	210	enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
767f433f	211
192738b7	212	lock_buffer(bh);
aacee720 BP	213	if (buffer_pinned(bh)) {
	214	set_bit(TR_TOUCHED, &tr->tr_flags);
	215	goto out;
	216	}
192738b7 BP	217	gfs2_log_lock(sdp);
	218	bd = bh->b_private;
	219	if (bd == NULL) {
	220	gfs2_log_unlock(sdp);
	221	unlock_buffer(bh);
	222	lock_page(bh->b_page);
	223	if (bh->b_private == NULL)
	224	bd = gfs2_alloc_bufdata(gl, bh, &gfs2_buf_lops);
	225	else
	226	bd = bh->b_private;
	227	unlock_page(bh->b_page);
	228	lock_buffer(bh);
	229	gfs2_log_lock(sdp);
	230	}
	231	gfs2_assert(sdp, bd->bd_gl == gl);
9862ca05	232	set_bit(TR_TOUCHED, &tr->tr_flags);
767f433f	233	if (!list_empty(&bd->bd_list))
192738b7	234	goto out_unlock;
767f433f SW	235	set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
	236	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
	237	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
	238	if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
d77d1b58	239	pr_err("Attempting to add uninitialised block to journal (inplace block=%lld)\n",
767f433f SW	240	(unsigned long long)bd->bd_bh->b_blocknr);
	241	BUG();
	242	}
2e60d768 BM	243	if (unlikely(state == SFS_FROZEN)) {
	244	printk(KERN_INFO "GFS2:adding buf while frozen\n");
	245	gfs2_assert_withdraw(sdp, 0);
	246	}
767f433f SW	247	gfs2_pin(sdp, bd->bd_bh);
	248	mh->__pad0 = cpu_to_be64(0);
	249	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
d69a3c65	250	list_add(&bd->bd_list, &tr->tr_buf);
767f433f	251	tr->tr_num_buf_new++;
192738b7	252	out_unlock:
767f433f	253	gfs2_log_unlock(sdp);
aacee720	254	out:
767f433f	255	unlock_buffer(bh);
350a9b0a SW	256	}
350a9b0a SW	257
1ad38c43	258	void gfs2_trans_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd)
b3b94faa	259	{
75f2b879 SW	260	struct gfs2_trans *tr = current->journal_info;
75f2b879 SW	261
c0752aa7	262	BUG_ON(!list_empty(&bd->bd_list));
5d054964	263	gfs2_add_revoke(sdp, bd);
9862ca05	264	set_bit(TR_TOUCHED, &tr->tr_flags);
75f2b879	265	tr->tr_num_revoke++;
b3b94faa DT	266	}
b3b94faa DT	267
5731be53	268	void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
b3b94faa	269	{
5731be53 SW	270	struct gfs2_bufdata bd, tmp;
	271	struct gfs2_trans *tr = current->journal_info;
	272	unsigned int n = len;
b3b94faa DT	273
b3b94faa DT	274	gfs2_log_lock(sdp);
c0752aa7	275	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
5731be53	276	if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
c0752aa7	277	list_del_init(&bd->bd_list);
b3b94faa DT	278	gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
b3b94faa DT	279	sdp->sd_log_num_revoke--;
5731be53 SW	280	kmem_cache_free(gfs2_bufdata_cachep, bd);
	281	tr->tr_num_revoke_rm++;
	282	if (--n == 0)
	283	break;
b3b94faa DT	284	}
b3b94faa DT	285	}
b3b94faa	286	gfs2_log_unlock(sdp);
b3b94faa DT	287	}
b3b94faa DT	288