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kill BH_Ordered flag

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Instead of abusing a buffer_head flag just add a variant of
sync_dirty_buffer which allows passing the exact type of write
flag required.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
2010-08-11 17:05:45 +02:00
committed by Al Viro
parent dad5eb6daa
commit 87e99511ea
5 changed files with 63 additions and 73 deletions
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39
fs/jbd2/commit.c
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@@ -101,7 +101,6 @@ static int journal_submit_commit_record(journal_t *journal,
struct commit_header *tmp;
struct buffer_head *bh;
int ret;
int barrier_done = 0;
struct timespec now = current_kernel_time();
if (is_journal_aborted(journal))
@@ -136,30 +135,22 @@ static int journal_submit_commit_record(journal_t *journal,
if (journal->j_flags & JBD2_BARRIER &&
!JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)) {
set_buffer_ordered(bh);
barrier_done = 1;
}
ret = submit_bh(WRITE_SYNC_PLUG, bh);
if (barrier_done)
clear_buffer_ordered(bh);
ret = submit_bh(WRITE_SYNC_PLUG | WRITE_BARRIER, bh);
if (ret == -EOPNOTSUPP) {
printk(KERN_WARNING
"JBD2: Disabling barriers on %s, "
"not supported by device\n", journal->j_devname);
write_lock(&journal->j_state_lock);
journal->j_flags &= ~JBD2_BARRIER;
write_unlock(&journal->j_state_lock);
/* is it possible for another commit to fail at roughly
* the same time as this one? If so, we don't want to
* trust the barrier flag in the super, but instead want
* to remember if we sent a barrier request
*/
if (ret == -EOPNOTSUPP && barrier_done) {
printk(KERN_WARNING
"JBD2: Disabling barriers on %s, "
"not supported by device\n", journal->j_devname);
write_lock(&journal->j_state_lock);
journal->j_flags &= ~JBD2_BARRIER;
write_unlock(&journal->j_state_lock);
/* And try again, without the barrier */
lock_buffer(bh);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
/* And try again, without the barrier */
lock_buffer(bh);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
ret = submit_bh(WRITE_SYNC_PLUG, bh);
}
} else {
ret = submit_bh(WRITE_SYNC_PLUG, bh);
}
*cbh = bh;