Commit 16615be1 authored by Steven Whitehouse's avatar Steven Whitehouse
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[GFS2] Clean up journaled data writing



This patch cleans up the code for writing journaled data into the log.
It also removes the need to allocate a small "tag" structure for each
block written into the log. Instead we just keep count of the outstanding
I/O so that we can be sure that its all been written at the correct time.
Another result of this patch is that a number of ll_rw_block() calls
have become submit_bh() calls, closing some races at the same time.
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 55c0c4ac
......@@ -341,12 +341,6 @@ struct gfs2_quota_data {
unsigned long qd_last_touched;
};
struct gfs2_log_buf {
struct list_head lb_list;
struct buffer_head *lb_bh;
struct buffer_head *lb_real;
};
struct gfs2_trans {
unsigned long tr_ip;
......@@ -631,7 +625,8 @@ struct gfs2_sbd {
unsigned long sd_log_flush_time;
struct rw_semaphore sd_log_flush_lock;
struct list_head sd_log_flush_list;
atomic_t sd_log_in_flight;
wait_queue_head_t sd_log_flush_wait;
unsigned int sd_log_flush_head;
u64 sd_log_flush_wrapped;
......
......@@ -104,11 +104,8 @@ static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
gfs2_assert(sdp, bd->bd_ail == ai);
if (!buffer_busy(bh)) {
if (!buffer_uptodate(bh)) {
gfs2_log_unlock(sdp);
if (!buffer_uptodate(bh))
gfs2_io_error_bh(sdp, bh);
gfs2_log_lock(sdp);
}
list_move(&bd->bd_ail_st_list, &ai->ai_ail2_list);
continue;
}
......@@ -118,9 +115,16 @@ static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
list_move(&bd->bd_ail_st_list, &ai->ai_ail1_list);
get_bh(bh);
gfs2_log_unlock(sdp);
wait_on_buffer(bh);
ll_rw_block(WRITE, 1, &bh);
lock_buffer(bh);
if (test_clear_buffer_dirty(bh)) {
bh->b_end_io = end_buffer_write_sync;
submit_bh(WRITE, bh);
} else {
unlock_buffer(bh);
brelse(bh);
}
gfs2_log_lock(sdp);
retry = 1;
......@@ -446,10 +450,10 @@ static unsigned int current_tail(struct gfs2_sbd *sdp)
return tail;
}
static inline void log_incr_head(struct gfs2_sbd *sdp)
void gfs2_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);
BUG_ON(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;
......@@ -457,6 +461,23 @@ static inline void log_incr_head(struct gfs2_sbd *sdp)
}
}
/**
* gfs2_log_write_endio - End of I/O for a log buffer
* @bh: The buffer head
* @uptodate: I/O Status
*
*/
static void gfs2_log_write_endio(struct buffer_head *bh, int uptodate)
{
struct gfs2_sbd *sdp = bh->b_private;
bh->b_private = NULL;
end_buffer_write_sync(bh, uptodate);
if (atomic_dec_and_test(&sdp->sd_log_in_flight))
wake_up(&sdp->sd_log_flush_wait);
}
/**
* gfs2_log_get_buf - Get and initialize a buffer to use for log control data
* @sdp: The GFS2 superblock
......@@ -467,24 +488,41 @@ static inline void log_incr_head(struct gfs2_sbd *sdp)
struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp)
{
u64 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);
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);
gfs2_log_incr_head(sdp);
atomic_inc(&sdp->sd_log_in_flight);
bh->b_private = sdp;
bh->b_end_io = gfs2_log_write_endio;
return bh;
}
/**
* gfs2_fake_write_endio -
* @bh: The buffer head
* @uptodate: The I/O Status
*
*/
static void gfs2_fake_write_endio(struct buffer_head *bh, int uptodate)
{
struct buffer_head *real_bh = bh->b_private;
struct gfs2_sbd *sdp = GFS2_SB(real_bh->b_page->mapping->host);
end_buffer_write_sync(bh, uptodate);
free_buffer_head(bh);
unlock_buffer(real_bh);
brelse(real_bh);
if (atomic_dec_and_test(&sdp->sd_log_in_flight))
wake_up(&sdp->sd_log_flush_wait);
}
/**
* gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log
* @sdp: the filesystem
......@@ -497,22 +535,20 @@ struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
struct buffer_head *real)
{
u64 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);
bh = alloc_buffer_head(GFP_NOFS | __GFP_NOFAIL);
atomic_set(&bh->b_count, 1);
bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate);
bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate) | (1 << BH_Lock);
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;
bh->b_private = real;
bh->b_end_io = gfs2_fake_write_endio;
log_incr_head(sdp);
gfs2_log_incr_head(sdp);
atomic_inc(&sdp->sd_log_in_flight);
return bh;
}
......@@ -579,45 +615,24 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
gfs2_assert_withdraw(sdp, !pull);
sdp->sd_log_idle = (tail == sdp->sd_log_flush_head);
log_incr_head(sdp);
gfs2_log_incr_head(sdp);
}
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;
int flushcount = 0;
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);
flushcount++;
DEFINE_WAIT(wait);
if (atomic_read(&sdp->sd_log_in_flight)) {
do {
prepare_to_wait(&sdp->sd_log_flush_wait, &wait,
TASK_UNINTERRUPTIBLE);
if (atomic_read(&sdp->sd_log_in_flight))
io_schedule();
} while(atomic_read(&sdp->sd_log_in_flight));
finish_wait(&sdp->sd_log_flush_wait, &wait);
}
/* If nothing was journaled, the header is unplanned and unwanted. */
if (flushcount) {
log_write_header(sdp, 0, 0);
} else {
unsigned int tail;
tail = current_tail(sdp);
gfs2_ail1_empty(sdp, 0);
if (sdp->sd_log_tail != tail)
log_pull_tail(sdp, tail);
}
log_write_header(sdp, 0, 0);
}
static void gfs2_ordered_write(struct gfs2_sbd *sdp)
......@@ -698,10 +713,16 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
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_num_databuf ==
sdp->sd_log_commited_buf +
sdp->sd_log_commited_databuf);
if (sdp->sd_log_num_buf != sdp->sd_log_commited_buf) {
printk(KERN_INFO "GFS2: log buf %u %u\n", sdp->sd_log_num_buf,
sdp->sd_log_commited_buf);
gfs2_assert_withdraw(sdp, 0);
}
if (sdp->sd_log_num_databuf != sdp->sd_log_commited_databuf) {
printk(KERN_INFO "GFS2: log databuf %u %u\n",
sdp->sd_log_num_databuf, sdp->sd_log_commited_databuf);
gfs2_assert_withdraw(sdp, 0);
}
gfs2_assert_withdraw(sdp,
sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke);
......@@ -713,7 +734,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
lops_before_commit(sdp);
gfs2_ordered_wait(sdp);
if (!list_empty(&sdp->sd_log_flush_list))
if (sdp->sd_log_head != sdp->sd_log_flush_head)
log_flush_commit(sdp);
else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle){
gfs2_log_lock(sdp);
......
......@@ -52,6 +52,7 @@ int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags);
int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_incr_head(struct gfs2_sbd *sdp);
struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
......
......@@ -91,6 +91,39 @@ static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
unlock_buffer(bh);
}
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 __glock_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
{
struct gfs2_glock *gl;
......@@ -181,7 +214,6 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp)
struct gfs2_log_descriptor *ld;
struct gfs2_bufdata *bd1 = NULL, *bd2;
unsigned int total;
unsigned int offset = BUF_OFFSET;
unsigned int limit;
unsigned int num;
unsigned n;
......@@ -198,18 +230,12 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp)
if (total > limit)
num = limit;
gfs2_log_unlock(sdp);
bh = gfs2_log_get_buf(sdp);
bh = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_METADATA);
gfs2_log_lock(sdp);
ld = (struct gfs2_log_descriptor *)bh->b_data;
ptr = (__be64 *)(bh->b_data + offset);
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(GFS2_LOG_DESC_METADATA);
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);
ld->ld_data2 = cpu_to_be32(0);
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
n = 0;
list_for_each_entry_continue(bd1, &sdp->sd_log_le_buf,
......@@ -220,17 +246,17 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp)
}
gfs2_log_unlock(sdp);
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
submit_bh(WRITE, 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);
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
submit_bh(WRITE, bh);
gfs2_log_lock(sdp);
if (++n >= num)
break;
......@@ -359,17 +385,11 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
if (!sdp->sd_log_num_revoke)
return;
bh = gfs2_log_get_buf(sdp);
ld = (struct gfs2_log_descriptor *)bh->b_data;
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(GFS2_LOG_DESC_REVOKE);
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);
ld->ld_data2 = cpu_to_be32(0);
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
offset = sizeof(struct gfs2_log_descriptor);
while (!list_empty(head)) {
......@@ -378,8 +398,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
sdp->sd_log_num_revoke--;
if (offset + sizeof(u64) > sdp->sd_sb.sb_bsize) {
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
submit_bh(WRITE, bh);
bh = gfs2_log_get_buf(sdp);
mh = (struct gfs2_meta_header *)bh->b_data;
......@@ -396,8 +415,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
}
gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
submit_bh(WRITE, bh);
}
static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
......@@ -562,118 +580,110 @@ out:
unlock_buffer(bd->bd_bh);
}
static int gfs2_check_magic(struct buffer_head *bh)
static void gfs2_check_magic(struct buffer_head *bh)
{
struct page *page = bh->b_page;
void *kaddr;
__be32 *ptr;
int rv = 0;
kaddr = kmap_atomic(page, KM_USER0);
clear_buffer_escaped(bh);
kaddr = kmap_atomic(bh->b_page, KM_USER0);
ptr = kaddr + bh_offset(bh);
if (*ptr == cpu_to_be32(GFS2_MAGIC))
rv = 1;
set_buffer_escaped(bh);
kunmap_atomic(kaddr, KM_USER0);
return rv;
}
/**
* databuf_lo_before_commit - Scan the data buffers, writing as we go
*
*/
static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
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 gfs2_bufdata *bd1 = NULL, *bd2;
struct buffer_head *bh = NULL,*bh1 = NULL;
struct buffer_head *bh1;
struct gfs2_log_descriptor *ld;
unsigned int limit;
unsigned int total;
unsigned int num, n;
__be64 *ptr = NULL;
int magic;
struct gfs2_bufdata *bd;
__be64 *ptr;
if (!bh)
return;
limit = databuf_limit(sdp);
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, bh);
gfs2_log_lock(sdp);
total = sdp->sd_log_num_databuf;
bd2 = bd1 = list_prepare_entry(bd1, &sdp->sd_log_le_databuf,
bd_le.le_list);
while(total) {
num = total;
if (num > limit)
num = limit;
gfs2_log_unlock(sdp);
bh = gfs2_log_get_buf(sdp);
gfs2_log_lock(sdp);
ld = (struct gfs2_log_descriptor *)bh->b_data;
ptr = (__be64 *)(bh->b_data + DATABUF_OFFSET);
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(GFS2_LOG_DESC_JDATA);
ld->ld_length = cpu_to_be32(num + 1);
ld->ld_data1 = cpu_to_be32(num);
ld->ld_data2 = cpu_to_be32(0);
memset(ld->ld_reserved, 0, sizeof(ld->ld_reserved));
n = 0;
list_for_each_entry_continue(bd1, &sdp->sd_log_le_databuf,
bd_le.le_list) {
bh1 = bd1->bd_bh;
magic = gfs2_check_magic(bh1);
*ptr++ = cpu_to_be64(bh1->b_blocknr);
*ptr++ = cpu_to_be64((__u64)magic);
clear_buffer_escaped(bh1);
if (unlikely(magic != 0))
set_buffer_escaped(bh1);
if (++n >= num)
break;
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);
if (bh) {
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
bh = NULL;
ptr = NULL;
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);
}
n = 0;
submit_bh(WRITE, bh1);
gfs2_log_lock(sdp);
list_for_each_entry_continue(bd2, &sdp->sd_log_le_databuf,
bd_le.le_list) {
if (!bd2->bd_bh)
continue;
/* copy buffer if it needs escaping */
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);
if (unlikely(buffer_escaped(bd2->bd_bh))) {
void *kaddr;
struct page *page = bd2->bd_bh->b_page;
bh = gfs2_log_get_buf(sdp);
kaddr = kmap_atomic(page, KM_USER0);
memcpy(bh->b_data,
kaddr + bh_offset(bd2->bd_bh),
sdp->sd_sb.sb_bsize);
kunmap_atomic(kaddr, KM_USER0);
*(__be32 *)bh->b_data = 0;
} else {
bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);
}
set_buffer_dirty(bh);
ll_rw_block(WRITE, 1, &bh);
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);
if (++n >= num)
break;
continue;
}
bh = NULL;
BUG_ON(total < num);
total -= num;
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,
......@@ -807,10 +817,10 @@ const struct gfs2_log_operations gfs2_databuf_lops = {
const struct gfs2_log_operations *gfs2_log_ops[] = {
&gfs2_glock_lops,
&gfs2_databuf_lops,
&gfs2_buf_lops,
&gfs2_revoke_lops,
&gfs2_rg_lops,
&gfs2_databuf_lops,
&gfs2_revoke_lops,
NULL,
};
......@@ -297,6 +297,37 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
unlock_page(bh->b_page);
}
void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int meta)
{
struct gfs2_sbd *sdp = GFS2_SB(bh->b_page->mapping->host);
struct gfs2_bufdata *bd = bh->b_private;
if (test_clear_buffer_pinned(bh)) {
list_del_init(&bd->bd_le.le_list);
if (meta) {
gfs2_assert_warn(sdp, sdp->sd_log_num_buf);
sdp->sd_log_num_buf--;
tr->tr_num_buf_rm++;
} else {
gfs2_assert_warn(sdp, sdp->sd_log_num_databuf);
</