mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
599 lines
14 KiB
C
599 lines
14 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 v.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/crc32.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "lm_interface.h"
|
|
#include "incore.h"
|
|
#include "bmap.h"
|
|
#include "glock.h"
|
|
#include "log.h"
|
|
#include "lops.h"
|
|
#include "meta_io.h"
|
|
#include "util.h"
|
|
#include "dir.h"
|
|
|
|
#define PULL 1
|
|
|
|
/**
|
|
* gfs2_struct2blk - compute stuff
|
|
* @sdp: the filesystem
|
|
* @nstruct: the number of structures
|
|
* @ssize: the size of the structures
|
|
*
|
|
* Compute the number of log descriptor blocks needed to hold a certain number
|
|
* of structures of a certain size.
|
|
*
|
|
* Returns: the number of blocks needed (minimum is always 1)
|
|
*/
|
|
|
|
unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
|
|
unsigned int ssize)
|
|
{
|
|
unsigned int blks;
|
|
unsigned int first, second;
|
|
|
|
blks = 1;
|
|
first = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) /
|
|
ssize;
|
|
|
|
if (nstruct > first) {
|
|
second = (sdp->sd_sb.sb_bsize -
|
|
sizeof(struct gfs2_meta_header)) / ssize;
|
|
blks += DIV_ROUND_UP(nstruct - first, second);
|
|
}
|
|
|
|
return blks;
|
|
}
|
|
|
|
void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags)
|
|
{
|
|
struct list_head *head = &sdp->sd_ail1_list;
|
|
uint64_t sync_gen;
|
|
struct list_head *first, *tmp;
|
|
struct gfs2_ail *first_ai, *ai;
|
|
|
|
gfs2_log_lock(sdp);
|
|
if (list_empty(head)) {
|
|
gfs2_log_unlock(sdp);
|
|
return;
|
|
}
|
|
sync_gen = sdp->sd_ail_sync_gen++;
|
|
|
|
first = head->prev;
|
|
first_ai = list_entry(first, struct gfs2_ail, ai_list);
|
|
first_ai->ai_sync_gen = sync_gen;
|
|
gfs2_ail1_start_one(sdp, first_ai);
|
|
|
|
if (flags & DIO_ALL)
|
|
first = NULL;
|
|
|
|
for (;;) {
|
|
if (first && (head->prev != first ||
|
|
gfs2_ail1_empty_one(sdp, first_ai, 0)))
|
|
break;
|
|
|
|
for (tmp = head->prev; tmp != head; tmp = tmp->prev) {
|
|
ai = list_entry(tmp, struct gfs2_ail, ai_list);
|
|
if (ai->ai_sync_gen >= sync_gen)
|
|
continue;
|
|
ai->ai_sync_gen = sync_gen;
|
|
gfs2_ail1_start_one(sdp, ai);
|
|
break;
|
|
}
|
|
|
|
if (tmp == head)
|
|
break;
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
|
|
{
|
|
struct gfs2_ail *ai, *s;
|
|
int ret;
|
|
|
|
gfs2_log_lock(sdp);
|
|
|
|
list_for_each_entry_safe_reverse(ai, s, &sdp->sd_ail1_list, ai_list) {
|
|
if (gfs2_ail1_empty_one(sdp, ai, flags))
|
|
list_move(&ai->ai_list, &sdp->sd_ail2_list);
|
|
else if (!(flags & DIO_ALL))
|
|
break;
|
|
}
|
|
|
|
ret = list_empty(&sdp->sd_ail1_list);
|
|
|
|
gfs2_log_unlock(sdp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
|
|
{
|
|
struct gfs2_ail *ai, *safe;
|
|
unsigned int old_tail = sdp->sd_log_tail;
|
|
int wrap = (new_tail < old_tail);
|
|
int a, b, rm;
|
|
|
|
gfs2_log_lock(sdp);
|
|
|
|
list_for_each_entry_safe(ai, safe, &sdp->sd_ail2_list, ai_list) {
|
|
a = (old_tail <= ai->ai_first);
|
|
b = (ai->ai_first < new_tail);
|
|
rm = (wrap) ? (a || b) : (a && b);
|
|
if (!rm)
|
|
continue;
|
|
|
|
gfs2_ail2_empty_one(sdp, ai);
|
|
list_del(&ai->ai_list);
|
|
gfs2_assert_warn(sdp, list_empty(&ai->ai_ail1_list));
|
|
gfs2_assert_warn(sdp, list_empty(&ai->ai_ail2_list));
|
|
kfree(ai);
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_reserve - Make a log reservation
|
|
* @sdp: The GFS2 superblock
|
|
* @blks: The number of blocks to reserve
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
|
|
{
|
|
unsigned int try = 0;
|
|
|
|
if (gfs2_assert_warn(sdp, blks) ||
|
|
gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&sdp->sd_log_reserve_mutex);
|
|
gfs2_log_lock(sdp);
|
|
while(sdp->sd_log_blks_free <= blks) {
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_ail1_empty(sdp, 0);
|
|
gfs2_log_flush(sdp, NULL);
|
|
|
|
if (try++)
|
|
gfs2_ail1_start(sdp, 0);
|
|
gfs2_log_lock(sdp);
|
|
}
|
|
sdp->sd_log_blks_free -= blks;
|
|
/* printk(KERN_INFO "reserved %u blocks (%u left)\n", blks, sdp->sd_log_blks_free); */
|
|
gfs2_log_unlock(sdp);
|
|
mutex_unlock(&sdp->sd_log_reserve_mutex);
|
|
|
|
down_read(&sdp->sd_log_flush_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_release - Release a given number of log blocks
|
|
* @sdp: The GFS2 superblock
|
|
* @blks: The number of blocks
|
|
*
|
|
*/
|
|
|
|
void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
|
|
{
|
|
|
|
gfs2_log_lock(sdp);
|
|
sdp->sd_log_blks_free += blks;
|
|
/* printk(KERN_INFO "released %u blocks (%u left)\n", blks, sdp->sd_log_blks_free); */
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
|
|
gfs2_log_unlock(sdp);
|
|
up_read(&sdp->sd_log_flush_lock);
|
|
}
|
|
|
|
static uint64_t log_bmap(struct gfs2_sbd *sdp, unsigned int lbn)
|
|
{
|
|
int new = 0;
|
|
uint64_t dbn;
|
|
int error;
|
|
int bdy;
|
|
|
|
error = gfs2_block_map(sdp->sd_jdesc->jd_inode, lbn, &new, &dbn, &bdy);
|
|
gfs2_assert_withdraw(sdp, !error && dbn);
|
|
|
|
return dbn;
|
|
}
|
|
|
|
/**
|
|
* log_distance - Compute distance between two journal blocks
|
|
* @sdp: The GFS2 superblock
|
|
* @newer: The most recent journal block of the pair
|
|
* @older: The older journal block of the pair
|
|
*
|
|
* Compute the distance (in the journal direction) between two
|
|
* blocks in the journal
|
|
*
|
|
* Returns: the distance in blocks
|
|
*/
|
|
|
|
static inline unsigned int log_distance(struct gfs2_sbd *sdp,
|
|
unsigned int newer,
|
|
unsigned int older)
|
|
{
|
|
int dist;
|
|
|
|
dist = newer - older;
|
|
if (dist < 0)
|
|
dist += sdp->sd_jdesc->jd_blocks;
|
|
|
|
return dist;
|
|
}
|
|
|
|
static unsigned int current_tail(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_ail *ai;
|
|
unsigned int tail;
|
|
|
|
gfs2_log_lock(sdp);
|
|
|
|
if (list_empty(&sdp->sd_ail1_list))
|
|
tail = sdp->sd_log_head;
|
|
else {
|
|
ai = list_entry(sdp->sd_ail1_list.prev,
|
|
struct gfs2_ail, ai_list);
|
|
tail = ai->ai_first;
|
|
}
|
|
|
|
gfs2_log_unlock(sdp);
|
|
|
|
return tail;
|
|
}
|
|
|
|
static inline void log_incr_head(struct gfs2_sbd *sdp)
|
|
{
|
|
if (sdp->sd_log_flush_head == sdp->sd_log_tail)
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_flush_head == sdp->sd_log_head);
|
|
|
|
if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) {
|
|
sdp->sd_log_flush_head = 0;
|
|
sdp->sd_log_flush_wrapped = 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_get_buf - Get and initialize a buffer to use for log control data
|
|
* @sdp: The GFS2 superblock
|
|
*
|
|
* Returns: the buffer_head
|
|
*/
|
|
|
|
struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp)
|
|
{
|
|
uint64_t blkno = log_bmap(sdp, sdp->sd_log_flush_head);
|
|
struct gfs2_log_buf *lb;
|
|
struct buffer_head *bh;
|
|
|
|
lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL);
|
|
list_add(&lb->lb_list, &sdp->sd_log_flush_list);
|
|
|
|
bh = lb->lb_bh = sb_getblk(sdp->sd_vfs, blkno);
|
|
lock_buffer(bh);
|
|
memset(bh->b_data, 0, bh->b_size);
|
|
set_buffer_uptodate(bh);
|
|
clear_buffer_dirty(bh);
|
|
unlock_buffer(bh);
|
|
|
|
log_incr_head(sdp);
|
|
|
|
return bh;
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log
|
|
* @sdp: the filesystem
|
|
* @data: the data the buffer_head should point to
|
|
*
|
|
* Returns: the log buffer descriptor
|
|
*/
|
|
|
|
struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
|
|
struct buffer_head *real)
|
|
{
|
|
uint64_t blkno = log_bmap(sdp, sdp->sd_log_flush_head);
|
|
struct gfs2_log_buf *lb;
|
|
struct buffer_head *bh;
|
|
|
|
lb = kzalloc(sizeof(struct gfs2_log_buf), GFP_NOFS | __GFP_NOFAIL);
|
|
list_add(&lb->lb_list, &sdp->sd_log_flush_list);
|
|
lb->lb_real = real;
|
|
|
|
bh = lb->lb_bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL);
|
|
atomic_set(&bh->b_count, 1);
|
|
bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate);
|
|
set_bh_page(bh, real->b_page, bh_offset(real));
|
|
bh->b_blocknr = blkno;
|
|
bh->b_size = sdp->sd_sb.sb_bsize;
|
|
bh->b_bdev = sdp->sd_vfs->s_bdev;
|
|
|
|
log_incr_head(sdp);
|
|
|
|
return bh;
|
|
}
|
|
|
|
static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail, int pull)
|
|
{
|
|
unsigned int dist = log_distance(sdp, new_tail, sdp->sd_log_tail);
|
|
|
|
ail2_empty(sdp, new_tail);
|
|
|
|
gfs2_log_lock(sdp);
|
|
sdp->sd_log_blks_free += dist - ((pull) ? 1 : 0);
|
|
/* printk(KERN_INFO "pull tail refunding %u blocks (%u left) pull=%d\n", dist - ((pull) ? 1 : 0), sdp->sd_log_blks_free, pull); */
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
|
|
gfs2_log_unlock(sdp);
|
|
|
|
sdp->sd_log_tail = new_tail;
|
|
}
|
|
|
|
/**
|
|
* log_write_header - Get and initialize a journal header buffer
|
|
* @sdp: The GFS2 superblock
|
|
*
|
|
* Returns: the initialized log buffer descriptor
|
|
*/
|
|
|
|
static void log_write_header(struct gfs2_sbd *sdp, uint32_t flags, int pull)
|
|
{
|
|
uint64_t blkno = log_bmap(sdp, sdp->sd_log_flush_head);
|
|
struct buffer_head *bh;
|
|
struct gfs2_log_header *lh;
|
|
unsigned int tail;
|
|
uint32_t hash;
|
|
|
|
/* printk(KERN_INFO "log write header start (flags=%08x, pull=%d)\n", flags, pull); */
|
|
|
|
bh = sb_getblk(sdp->sd_vfs, blkno);
|
|
lock_buffer(bh);
|
|
memset(bh->b_data, 0, bh->b_size);
|
|
set_buffer_uptodate(bh);
|
|
clear_buffer_dirty(bh);
|
|
unlock_buffer(bh);
|
|
|
|
gfs2_ail1_empty(sdp, 0);
|
|
tail = current_tail(sdp);
|
|
|
|
lh = (struct gfs2_log_header *)bh->b_data;
|
|
memset(lh, 0, sizeof(struct gfs2_log_header));
|
|
lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH);
|
|
lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH);
|
|
lh->lh_sequence = be64_to_cpu(sdp->sd_log_sequence++);
|
|
lh->lh_flags = be32_to_cpu(flags);
|
|
lh->lh_tail = be32_to_cpu(tail);
|
|
lh->lh_blkno = be32_to_cpu(sdp->sd_log_flush_head);
|
|
hash = gfs2_disk_hash(bh->b_data, sizeof(struct gfs2_log_header));
|
|
lh->lh_hash = cpu_to_be32(hash);
|
|
|
|
set_buffer_dirty(bh);
|
|
if (sync_dirty_buffer(bh))
|
|
gfs2_io_error_bh(sdp, bh);
|
|
brelse(bh);
|
|
|
|
if (sdp->sd_log_tail != tail)
|
|
log_pull_tail(sdp, tail, pull);
|
|
else
|
|
gfs2_assert_withdraw(sdp, !pull);
|
|
|
|
sdp->sd_log_idle = (tail == sdp->sd_log_flush_head);
|
|
log_incr_head(sdp);
|
|
|
|
/* printk(KERN_INFO "log write header out\n"); */
|
|
}
|
|
|
|
static void log_flush_commit(struct gfs2_sbd *sdp)
|
|
{
|
|
struct list_head *head = &sdp->sd_log_flush_list;
|
|
struct gfs2_log_buf *lb;
|
|
struct buffer_head *bh;
|
|
#if 0
|
|
unsigned int d;
|
|
|
|
d = log_distance(sdp, sdp->sd_log_flush_head, sdp->sd_log_head);
|
|
|
|
gfs2_assert_withdraw(sdp, d + 1 == sdp->sd_log_blks_reserved);
|
|
#endif
|
|
|
|
while (!list_empty(head)) {
|
|
lb = list_entry(head->next, struct gfs2_log_buf, lb_list);
|
|
list_del(&lb->lb_list);
|
|
bh = lb->lb_bh;
|
|
|
|
wait_on_buffer(bh);
|
|
if (!buffer_uptodate(bh))
|
|
gfs2_io_error_bh(sdp, bh);
|
|
if (lb->lb_real) {
|
|
while (atomic_read(&bh->b_count) != 1) /* Grrrr... */
|
|
schedule();
|
|
free_buffer_head(bh);
|
|
} else
|
|
brelse(bh);
|
|
kfree(lb);
|
|
}
|
|
|
|
log_write_header(sdp, 0, 0);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_flush - flush incore transaction(s)
|
|
* @sdp: the filesystem
|
|
* @gl: The glock structure to flush. If NULL, flush the whole incore log
|
|
*
|
|
*/
|
|
|
|
void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
|
|
{
|
|
struct gfs2_ail *ai;
|
|
|
|
down_write(&sdp->sd_log_flush_lock);
|
|
|
|
if (gl) {
|
|
gfs2_log_lock(sdp);
|
|
if (list_empty(&gl->gl_le.le_list)) {
|
|
gfs2_log_unlock(sdp);
|
|
up_write(&sdp->sd_log_flush_lock);
|
|
return;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
ai = kzalloc(sizeof(struct gfs2_ail), GFP_NOFS | __GFP_NOFAIL);
|
|
INIT_LIST_HEAD(&ai->ai_ail1_list);
|
|
INIT_LIST_HEAD(&ai->ai_ail2_list);
|
|
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_num_buf == sdp->sd_log_commited_buf);
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke);
|
|
|
|
sdp->sd_log_flush_head = sdp->sd_log_head;
|
|
sdp->sd_log_flush_wrapped = 0;
|
|
ai->ai_first = sdp->sd_log_flush_head;
|
|
|
|
lops_before_commit(sdp);
|
|
if (!list_empty(&sdp->sd_log_flush_list))
|
|
log_flush_commit(sdp);
|
|
else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle)
|
|
log_write_header(sdp, 0, PULL);
|
|
lops_after_commit(sdp, ai);
|
|
sdp->sd_log_head = sdp->sd_log_flush_head;
|
|
|
|
/* printk(KERN_INFO "sd_log_num_hdrs %u\n", sdp->sd_log_num_hdrs); */
|
|
sdp->sd_log_blks_free -= sdp->sd_log_num_hdrs;
|
|
|
|
sdp->sd_log_blks_reserved =
|
|
sdp->sd_log_commited_buf =
|
|
sdp->sd_log_num_hdrs =
|
|
sdp->sd_log_commited_revoke = 0;
|
|
|
|
gfs2_log_lock(sdp);
|
|
if (!list_empty(&ai->ai_ail1_list)) {
|
|
list_add(&ai->ai_list, &sdp->sd_ail1_list);
|
|
ai = NULL;
|
|
}
|
|
gfs2_log_unlock(sdp);
|
|
|
|
sdp->sd_vfs->s_dirt = 0;
|
|
up_write(&sdp->sd_log_flush_lock);
|
|
|
|
kfree(ai);
|
|
}
|
|
|
|
static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
unsigned int reserved = 1;
|
|
unsigned int old;
|
|
|
|
gfs2_log_lock(sdp);
|
|
|
|
sdp->sd_log_commited_buf += tr->tr_num_buf_new - tr->tr_num_buf_rm;
|
|
gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_buf) >= 0);
|
|
sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
|
|
gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0);
|
|
|
|
if (sdp->sd_log_commited_buf)
|
|
reserved += sdp->sd_log_commited_buf;
|
|
if (sdp->sd_log_commited_revoke)
|
|
reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke,
|
|
sizeof(uint64_t));
|
|
|
|
old = sdp->sd_log_blks_free;
|
|
sdp->sd_log_blks_free += tr->tr_reserved -
|
|
(reserved - sdp->sd_log_blks_reserved);
|
|
|
|
gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old);
|
|
gfs2_assert_withdraw(sdp,
|
|
sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks +
|
|
sdp->sd_log_num_hdrs);
|
|
|
|
sdp->sd_log_blks_reserved = reserved;
|
|
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_commit - Commit a transaction to the log
|
|
* @sdp: the filesystem
|
|
* @tr: the transaction
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
|
|
{
|
|
log_refund(sdp, tr);
|
|
lops_incore_commit(sdp, tr);
|
|
|
|
sdp->sd_vfs->s_dirt = 1;
|
|
up_read(&sdp->sd_log_flush_lock);
|
|
|
|
gfs2_log_lock(sdp);
|
|
if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) {
|
|
gfs2_log_unlock(sdp);
|
|
gfs2_log_flush(sdp, NULL);
|
|
} else
|
|
gfs2_log_unlock(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_log_shutdown - write a shutdown header into a journal
|
|
* @sdp: the filesystem
|
|
*
|
|
*/
|
|
|
|
void gfs2_log_shutdown(struct gfs2_sbd *sdp)
|
|
{
|
|
down_write(&sdp->sd_log_flush_lock);
|
|
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_gl);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_buf);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_jdata);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_databuf);
|
|
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_hdrs);
|
|
gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list));
|
|
|
|
sdp->sd_log_flush_head = sdp->sd_log_head;
|
|
sdp->sd_log_flush_wrapped = 0;
|
|
|
|
log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0);
|
|
|
|
/* printk(KERN_INFO "sd_log_blks_free %u, sd_jdesc->jd_blocks %u\n", sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); */
|
|
gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
|
|
gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
|
|
gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));
|
|
|
|
sdp->sd_log_head = sdp->sd_log_flush_head;
|
|
sdp->sd_log_tail = sdp->sd_log_head;
|
|
|
|
up_write(&sdp->sd_log_flush_lock);
|
|
}
|
|
|