mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
* 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block: (65 commits) Documentation/iostats.txt: bit-size reference etc. cfq-iosched: removing unnecessary think time checking cfq-iosched: Don't clear queue stats when preempt. blk-throttle: Reset group slice when limits are changed blk-cgroup: Only give unaccounted_time under debug cfq-iosched: Don't set active queue in preempt block: fix non-atomic access to genhd inflight structures block: attempt to merge with existing requests on plug flush block: NULL dereference on error path in __blkdev_get() cfq-iosched: Don't update group weights when on service tree fs: assign sb->s_bdi to default_backing_dev_info if the bdi is going away block: Require subsystems to explicitly allocate bio_set integrity mempool jbd2: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging jbd: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging fs: make fsync_buffers_list() plug mm: make generic_writepages() use plugging blk-cgroup: Add unaccounted time to timeslice_used. block: fixup plugging stubs for !CONFIG_BLOCK block: remove obsolete comments for blkdev_issue_zeroout. blktrace: Use rq->cmd_flags directly in blk_add_trace_rq. ... Fix up conflicts in fs/{aio.c,super.c}
780 lines
19 KiB
C
780 lines
19 KiB
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/gfs2_ondisk.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/fs.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "inode.h"
|
|
#include "glock.h"
|
|
#include "log.h"
|
|
#include "lops.h"
|
|
#include "meta_io.h"
|
|
#include "recovery.h"
|
|
#include "rgrp.h"
|
|
#include "trans.h"
|
|
#include "util.h"
|
|
#include "trace_gfs2.h"
|
|
|
|
/**
|
|
* gfs2_pin - Pin a buffer in memory
|
|
* @sdp: The superblock
|
|
* @bh: The buffer to be pinned
|
|
*
|
|
* The log lock must be held when calling this function
|
|
*/
|
|
static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
|
|
{
|
|
struct gfs2_bufdata *bd;
|
|
|
|
gfs2_assert_withdraw(sdp, test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
|
|
|
|
clear_buffer_dirty(bh);
|
|
if (test_set_buffer_pinned(bh))
|
|
gfs2_assert_withdraw(sdp, 0);
|
|
if (!buffer_uptodate(bh))
|
|
gfs2_io_error_bh(sdp, bh);
|
|
bd = bh->b_private;
|
|
/* If this buffer is in the AIL and it has already been written
|
|
* to in-place disk block, remove it from the AIL.
|
|
*/
|
|
spin_lock(&sdp->sd_ail_lock);
|
|
if (bd->bd_ail)
|
|
list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
|
|
spin_unlock(&sdp->sd_ail_lock);
|
|
get_bh(bh);
|
|
atomic_inc(&sdp->sd_log_pinned);
|
|
trace_gfs2_pin(bd, 1);
|
|
}
|
|
|
|
/**
|
|
* gfs2_unpin - Unpin a buffer
|
|
* @sdp: the filesystem the buffer belongs to
|
|
* @bh: The buffer to unpin
|
|
* @ai:
|
|
*
|
|
*/
|
|
|
|
static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
|
|
struct gfs2_ail *ai)
|
|
{
|
|
struct gfs2_bufdata *bd = bh->b_private;
|
|
|
|
gfs2_assert_withdraw(sdp, buffer_uptodate(bh));
|
|
|
|
if (!buffer_pinned(bh))
|
|
gfs2_assert_withdraw(sdp, 0);
|
|
|
|
lock_buffer(bh);
|
|
mark_buffer_dirty(bh);
|
|
clear_buffer_pinned(bh);
|
|
|
|
spin_lock(&sdp->sd_ail_lock);
|
|
if (bd->bd_ail) {
|
|
list_del(&bd->bd_ail_st_list);
|
|
brelse(bh);
|
|
} else {
|
|
struct gfs2_glock *gl = bd->bd_gl;
|
|
list_add(&bd->bd_ail_gl_list, &gl->gl_ail_list);
|
|
atomic_inc(&gl->gl_ail_count);
|
|
}
|
|
bd->bd_ail = ai;
|
|
list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
|
|
spin_unlock(&sdp->sd_ail_lock);
|
|
|
|
if (test_and_clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags))
|
|
gfs2_glock_schedule_for_reclaim(bd->bd_gl);
|
|
trace_gfs2_pin(bd, 0);
|
|
unlock_buffer(bh);
|
|
atomic_dec(&sdp->sd_log_pinned);
|
|
}
|
|
|
|
|
|
static inline struct gfs2_log_descriptor *bh_log_desc(struct buffer_head *bh)
|
|
{
|
|
return (struct gfs2_log_descriptor *)bh->b_data;
|
|
}
|
|
|
|
static inline __be64 *bh_log_ptr(struct buffer_head *bh)
|
|
{
|
|
struct gfs2_log_descriptor *ld = bh_log_desc(bh);
|
|
return (__force __be64 *)(ld + 1);
|
|
}
|
|
|
|
static inline __be64 *bh_ptr_end(struct buffer_head *bh)
|
|
{
|
|
return (__force __be64 *)(bh->b_data + bh->b_size);
|
|
}
|
|
|
|
|
|
static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
|
|
{
|
|
struct buffer_head *bh = gfs2_log_get_buf(sdp);
|
|
struct gfs2_log_descriptor *ld = bh_log_desc(bh);
|
|
ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
ld->ld_header.mh_type = cpu_to_be32(GFS2_METATYPE_LD);
|
|
ld->ld_header.mh_format = cpu_to_be32(GFS2_FORMAT_LD);
|
|
ld->ld_type = cpu_to_be32(ld_type);
|
|
ld->ld_length = 0;
|
|
ld->ld_data1 = 0;
|
|
ld->ld_data2 = 0;
|
|
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
|
|
return bh;
|
|
}
|
|
|
|
static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
|
|
struct gfs2_meta_header *mh;
|
|
struct gfs2_trans *tr;
|
|
|
|
lock_buffer(bd->bd_bh);
|
|
gfs2_log_lock(sdp);
|
|
if (!list_empty(&bd->bd_list_tr))
|
|
goto out;
|
|
tr = current->journal_info;
|
|
tr->tr_touched = 1;
|
|
tr->tr_num_buf++;
|
|
list_add(&bd->bd_list_tr, &tr->tr_list_buf);
|
|
if (!list_empty(&le->le_list))
|
|
goto out;
|
|
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
|
|
gfs2_meta_check(sdp, bd->bd_bh);
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
|
|
mh->__pad0 = cpu_to_be64(0);
|
|
mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
|
|
sdp->sd_log_num_buf++;
|
|
list_add(&le->le_list, &sdp->sd_log_le_buf);
|
|
tr->tr_num_buf_new++;
|
|
out:
|
|
gfs2_log_unlock(sdp);
|
|
unlock_buffer(bd->bd_bh);
|
|
}
|
|
|
|
static void buf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct buffer_head *bh;
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_bufdata *bd1 = NULL, *bd2;
|
|
unsigned int total;
|
|
unsigned int limit;
|
|
unsigned int num;
|
|
unsigned n;
|
|
__be64 *ptr;
|
|
|
|
limit = buf_limit(sdp);
|
|
/* for 4k blocks, limit = 503 */
|
|
|
|
gfs2_log_lock(sdp);
|
|
total = sdp->sd_log_num_buf;
|
|
bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list);
|
|
while(total) {
|
|
num = total;
|
|
if (total > limit)
|
|
num = limit;
|
|
gfs2_log_unlock(sdp);
|
|
bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA);
|
|
gfs2_log_lock(sdp);
|
|
ld = bh_log_desc(bh);
|
|
ptr = bh_log_ptr(bh);
|
|
ld->ld_length = cpu_to_be32(num + 1);
|
|
ld->ld_data1 = cpu_to_be32(num);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
|
|
bd_le.le_list) {
|
|
*ptr++ = cpu_to_be64(bd1->bd_bh->b_blocknr);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
submit_bh(WRITE_SYNC, bh);
|
|
gfs2_log_lock(sdp);
|
|
|
|
n = 0;
|
|
list_for_each_entry_continue(bd2, &sdp->sd_log_le_buf,
|
|
bd_le.le_list) {
|
|
get_bh(bd2->bd_bh);
|
|
gfs2_log_unlock(sdp);
|
|
lock_buffer(bd2->bd_bh);
|
|
bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
|
|
submit_bh(WRITE_SYNC, bh);
|
|
gfs2_log_lock(sdp);
|
|
if (++n >= num)
|
|
break;
|
|
}
|
|
|
|
BUG_ON(total < num);
|
|
total -= num;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_buf;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_del_init(&bd->bd_le.le_list);
|
|
sdp->sd_log_num_buf--;
|
|
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
|
|
}
|
|
|
|
static void buf_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_blocks = 0;
|
|
sdp->sd_replayed_blocks = 0;
|
|
}
|
|
|
|
static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld, __be64 *ptr,
|
|
int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
unsigned int blks = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh_log, *bh_ip;
|
|
u64 blkno;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_METADATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
|
|
sdp->sd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(sdp, blkno, start))
|
|
continue;
|
|
|
|
error = gfs2_replay_read_block(jd, start, &bh_log);
|
|
if (error)
|
|
return error;
|
|
|
|
bh_ip = gfs2_meta_new(gl, blkno);
|
|
memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
|
|
|
|
if (gfs2_meta_check(sdp, bh_ip))
|
|
error = -EIO;
|
|
else
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
|
|
if (error)
|
|
break;
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_meta_sync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_trans *tr;
|
|
|
|
tr = current->journal_info;
|
|
tr->tr_touched = 1;
|
|
tr->tr_num_revoke++;
|
|
sdp->sd_log_num_revoke++;
|
|
list_add(&le->le_list, &sdp->sd_log_le_revoke);
|
|
}
|
|
|
|
static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_meta_header *mh;
|
|
struct buffer_head *bh;
|
|
unsigned int offset;
|
|
struct list_head *head = &sdp->sd_log_le_revoke;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
if (!sdp->sd_log_num_revoke)
|
|
return;
|
|
|
|
bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE);
|
|
ld = bh_log_desc(bh);
|
|
ld->ld_length = cpu_to_be32(gfs2_struct2blk(sdp, sdp->sd_log_num_revoke,
|
|
sizeof(u64)));
|
|
ld->ld_data1 = cpu_to_be32(sdp->sd_log_num_revoke);
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_del_init(&bd->bd_le.le_list);
|
|
sdp->sd_log_num_revoke--;
|
|
|
|
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
|
|
submit_bh(WRITE_SYNC, bh);
|
|
|
|
bh = gfs2_log_get_buf(sdp);
|
|
mh = (struct gfs2_meta_header *)bh->b_data;
|
|
mh->mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
mh->mh_type = cpu_to_be32(GFS2_METATYPE_LB);
|
|
mh->mh_format = cpu_to_be32(GFS2_FORMAT_LB);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
}
|
|
|
|
*(__be64 *)(bh->b_data + offset) = cpu_to_be64(bd->bd_blkno);
|
|
kmem_cache_free(gfs2_bufdata_cachep, bd);
|
|
|
|
offset += sizeof(u64);
|
|
}
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
|
|
|
|
submit_bh(WRITE_SYNC, bh);
|
|
}
|
|
|
|
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (pass != 0)
|
|
return;
|
|
|
|
sdp->sd_found_revokes = 0;
|
|
sdp->sd_replay_tail = head->lh_tail;
|
|
}
|
|
|
|
static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld, __be64 *ptr,
|
|
int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
unsigned int blks = be32_to_cpu(ld->ld_length);
|
|
unsigned int revokes = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh;
|
|
unsigned int offset;
|
|
u64 blkno;
|
|
int first = 1;
|
|
int error;
|
|
|
|
if (pass != 0 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_REVOKE)
|
|
return 0;
|
|
|
|
offset = sizeof(struct gfs2_log_descriptor);
|
|
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
error = gfs2_replay_read_block(jd, start, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!first)
|
|
gfs2_metatype_check(sdp, bh, GFS2_METATYPE_LB);
|
|
|
|
while (offset + sizeof(u64) <= sdp->sd_sb.sb_bsize) {
|
|
blkno = be64_to_cpu(*(__be64 *)(bh->b_data + offset));
|
|
|
|
error = gfs2_revoke_add(sdp, blkno, start);
|
|
if (error < 0) {
|
|
brelse(bh);
|
|
return error;
|
|
}
|
|
else if (error)
|
|
sdp->sd_found_revokes++;
|
|
|
|
if (!--revokes)
|
|
break;
|
|
offset += sizeof(u64);
|
|
}
|
|
|
|
brelse(bh);
|
|
offset = sizeof(struct gfs2_meta_header);
|
|
first = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_revoke_clean(sdp);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
fs_info(sdp, "jid=%u: Found %u revoke tags\n",
|
|
jd->jd_jid, sdp->sd_found_revokes);
|
|
|
|
gfs2_revoke_clean(sdp);
|
|
}
|
|
|
|
static void rg_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_trans *tr = current->journal_info;
|
|
|
|
tr->tr_touched = 1;
|
|
|
|
rgd = container_of(le, struct gfs2_rgrpd, rd_le);
|
|
|
|
gfs2_log_lock(sdp);
|
|
if (!list_empty(&le->le_list)){
|
|
gfs2_log_unlock(sdp);
|
|
return;
|
|
}
|
|
gfs2_rgrp_bh_hold(rgd);
|
|
sdp->sd_log_num_rg++;
|
|
list_add(&le->le_list, &sdp->sd_log_le_rg);
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static void rg_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_rg;
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
while (!list_empty(head)) {
|
|
rgd = list_entry(head->next, struct gfs2_rgrpd, rd_le.le_list);
|
|
list_del_init(&rgd->rd_le.le_list);
|
|
sdp->sd_log_num_rg--;
|
|
|
|
gfs2_rgrp_repolish_clones(rgd);
|
|
gfs2_rgrp_bh_put(rgd);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_rg);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_add - Add a databuf to the transaction.
|
|
*
|
|
* 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.
|
|
*/
|
|
static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
|
|
{
|
|
struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
|
|
struct gfs2_trans *tr = current->journal_info;
|
|
struct address_space *mapping = bd->bd_bh->b_page->mapping;
|
|
struct gfs2_inode *ip = GFS2_I(mapping->host);
|
|
|
|
lock_buffer(bd->bd_bh);
|
|
gfs2_log_lock(sdp);
|
|
if (tr) {
|
|
if (!list_empty(&bd->bd_list_tr))
|
|
goto out;
|
|
tr->tr_touched = 1;
|
|
if (gfs2_is_jdata(ip)) {
|
|
tr->tr_num_buf++;
|
|
list_add(&bd->bd_list_tr, &tr->tr_list_buf);
|
|
}
|
|
}
|
|
if (!list_empty(&le->le_list))
|
|
goto out;
|
|
|
|
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
|
|
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
|
|
if (gfs2_is_jdata(ip)) {
|
|
gfs2_pin(sdp, bd->bd_bh);
|
|
tr->tr_num_databuf_new++;
|
|
sdp->sd_log_num_databuf++;
|
|
list_add_tail(&le->le_list, &sdp->sd_log_le_databuf);
|
|
} else {
|
|
list_add_tail(&le->le_list, &sdp->sd_log_le_ordered);
|
|
}
|
|
out:
|
|
gfs2_log_unlock(sdp);
|
|
unlock_buffer(bd->bd_bh);
|
|
}
|
|
|
|
static void gfs2_check_magic(struct buffer_head *bh)
|
|
{
|
|
void *kaddr;
|
|
__be32 *ptr;
|
|
|
|
clear_buffer_escaped(bh);
|
|
kaddr = kmap_atomic(bh->b_page, KM_USER0);
|
|
ptr = kaddr + bh_offset(bh);
|
|
if (*ptr == cpu_to_be32(GFS2_MAGIC))
|
|
set_buffer_escaped(bh);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
}
|
|
|
|
static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh,
|
|
struct list_head *list, struct list_head *done,
|
|
unsigned int n)
|
|
{
|
|
struct buffer_head *bh1;
|
|
struct gfs2_log_descriptor *ld;
|
|
struct gfs2_bufdata *bd;
|
|
__be64 *ptr;
|
|
|
|
if (!bh)
|
|
return;
|
|
|
|
ld = bh_log_desc(bh);
|
|
ld->ld_length = cpu_to_be32(n + 1);
|
|
ld->ld_data1 = cpu_to_be32(n);
|
|
|
|
ptr = bh_log_ptr(bh);
|
|
|
|
get_bh(bh);
|
|
submit_bh(WRITE_SYNC, bh);
|
|
gfs2_log_lock(sdp);
|
|
while(!list_empty(list)) {
|
|
bd = list_entry(list->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_move_tail(&bd->bd_le.le_list, done);
|
|
get_bh(bd->bd_bh);
|
|
while (be64_to_cpu(*ptr) != bd->bd_bh->b_blocknr) {
|
|
gfs2_log_incr_head(sdp);
|
|
ptr += 2;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
lock_buffer(bd->bd_bh);
|
|
if (buffer_escaped(bd->bd_bh)) {
|
|
void *kaddr;
|
|
bh1 = gfs2_log_get_buf(sdp);
|
|
kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0);
|
|
memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh),
|
|
bh1->b_size);
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
*(__be32 *)bh1->b_data = 0;
|
|
clear_buffer_escaped(bd->bd_bh);
|
|
unlock_buffer(bd->bd_bh);
|
|
brelse(bd->bd_bh);
|
|
} else {
|
|
bh1 = gfs2_log_fake_buf(sdp, bd->bd_bh);
|
|
}
|
|
submit_bh(WRITE_SYNC, bh1);
|
|
gfs2_log_lock(sdp);
|
|
ptr += 2;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
brelse(bh);
|
|
}
|
|
|
|
/**
|
|
* databuf_lo_before_commit - Scan the data buffers, writing as we go
|
|
*
|
|
*/
|
|
|
|
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_bufdata *bd = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
unsigned int n = 0;
|
|
__be64 *ptr = NULL, *end = NULL;
|
|
LIST_HEAD(processed);
|
|
LIST_HEAD(in_progress);
|
|
|
|
gfs2_log_lock(sdp);
|
|
while (!list_empty(&sdp->sd_log_le_databuf)) {
|
|
if (ptr == end) {
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
|
|
n = 0;
|
|
bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_JDATA);
|
|
ptr = bh_log_ptr(bh);
|
|
end = bh_ptr_end(bh) - 1;
|
|
gfs2_log_lock(sdp);
|
|
continue;
|
|
}
|
|
bd = list_entry(sdp->sd_log_le_databuf.next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_move_tail(&bd->bd_le.le_list, &in_progress);
|
|
gfs2_check_magic(bd->bd_bh);
|
|
*ptr++ = cpu_to_be64(bd->bd_bh->b_blocknr);
|
|
*ptr++ = cpu_to_be64(buffer_escaped(bh) ? 1 : 0);
|
|
n++;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_write_blocks(sdp, bh, &in_progress, &processed, n);
|
|
gfs2_log_lock(sdp);
|
|
list_splice(&processed, &sdp->sd_log_le_databuf);
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
|
|
struct gfs2_log_descriptor *ld,
|
|
__be64 *ptr, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
unsigned int blks = be32_to_cpu(ld->ld_data1);
|
|
struct buffer_head *bh_log, *bh_ip;
|
|
u64 blkno;
|
|
u64 esc;
|
|
int error = 0;
|
|
|
|
if (pass != 1 || be32_to_cpu(ld->ld_type) != GFS2_LOG_DESC_JDATA)
|
|
return 0;
|
|
|
|
gfs2_replay_incr_blk(sdp, &start);
|
|
for (; blks; gfs2_replay_incr_blk(sdp, &start), blks--) {
|
|
blkno = be64_to_cpu(*ptr++);
|
|
esc = be64_to_cpu(*ptr++);
|
|
|
|
sdp->sd_found_blocks++;
|
|
|
|
if (gfs2_revoke_check(sdp, blkno, start))
|
|
continue;
|
|
|
|
error = gfs2_replay_read_block(jd, start, &bh_log);
|
|
if (error)
|
|
return error;
|
|
|
|
bh_ip = gfs2_meta_new(gl, blkno);
|
|
memcpy(bh_ip->b_data, bh_log->b_data, bh_log->b_size);
|
|
|
|
/* Unescape */
|
|
if (esc) {
|
|
__be32 *eptr = (__be32 *)bh_ip->b_data;
|
|
*eptr = cpu_to_be32(GFS2_MAGIC);
|
|
}
|
|
mark_buffer_dirty(bh_ip);
|
|
|
|
brelse(bh_log);
|
|
brelse(bh_ip);
|
|
if (error)
|
|
break;
|
|
|
|
sdp->sd_replayed_blocks++;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/* FIXME: sort out accounting for log blocks etc. */
|
|
|
|
static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
|
|
if (error) {
|
|
gfs2_meta_sync(ip->i_gl);
|
|
return;
|
|
}
|
|
if (pass != 1)
|
|
return;
|
|
|
|
/* data sync? */
|
|
gfs2_meta_sync(ip->i_gl);
|
|
|
|
fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
|
|
jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
|
|
}
|
|
|
|
static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_le_databuf;
|
|
struct gfs2_bufdata *bd;
|
|
|
|
while (!list_empty(head)) {
|
|
bd = list_entry(head->next, struct gfs2_bufdata, bd_le.le_list);
|
|
list_del_init(&bd->bd_le.le_list);
|
|
sdp->sd_log_num_databuf--;
|
|
gfs2_unpin(sdp, bd->bd_bh, ai);
|
|
}
|
|
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
|
|
}
|
|
|
|
|
|
const struct gfs2_log_operations gfs2_buf_lops = {
|
|
.lo_add = buf_lo_add,
|
|
.lo_before_commit = buf_lo_before_commit,
|
|
.lo_after_commit = buf_lo_after_commit,
|
|
.lo_before_scan = buf_lo_before_scan,
|
|
.lo_scan_elements = buf_lo_scan_elements,
|
|
.lo_after_scan = buf_lo_after_scan,
|
|
.lo_name = "buf",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_revoke_lops = {
|
|
.lo_add = revoke_lo_add,
|
|
.lo_before_commit = revoke_lo_before_commit,
|
|
.lo_before_scan = revoke_lo_before_scan,
|
|
.lo_scan_elements = revoke_lo_scan_elements,
|
|
.lo_after_scan = revoke_lo_after_scan,
|
|
.lo_name = "revoke",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_rg_lops = {
|
|
.lo_add = rg_lo_add,
|
|
.lo_after_commit = rg_lo_after_commit,
|
|
.lo_name = "rg",
|
|
};
|
|
|
|
const struct gfs2_log_operations gfs2_databuf_lops = {
|
|
.lo_add = databuf_lo_add,
|
|
.lo_before_commit = databuf_lo_before_commit,
|
|
.lo_after_commit = databuf_lo_after_commit,
|
|
.lo_scan_elements = databuf_lo_scan_elements,
|
|
.lo_after_scan = databuf_lo_after_scan,
|
|
.lo_name = "databuf",
|
|
};
|
|
|
|
const struct gfs2_log_operations *gfs2_log_ops[] = {
|
|
&gfs2_databuf_lops,
|
|
&gfs2_buf_lops,
|
|
&gfs2_rg_lops,
|
|
&gfs2_revoke_lops,
|
|
NULL,
|
|
};
|
|
|