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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-04-06 19:01:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-07 08:31:17 -0700 |
| commit | 47420c799830d4676e544dbec56b2a7f787528f5 (patch) | |
| tree | dd61f6c96942b07f762129c893d9cbbbeff60735 /fs/nilfs2/mdt.c | |
| parent | a2e7d2df82cafb76f76809ddf6e2caa8afe4f75e (diff) | |
| download | linux-47420c799830d4676e544dbec56b2a7f787528f5.tar.gz linux-47420c799830d4676e544dbec56b2a7f787528f5.tar.bz2 linux-47420c799830d4676e544dbec56b2a7f787528f5.zip | |
nilfs2: avoid double error caused by nilfs_transaction_end
Pekka Enberg pointed out that double error handlings found after
nilfs_transaction_end() can be avoided by separating abort operation:
OK, I don't understand this. The only way nilfs_transaction_end() can
fail is if we have NILFS_TI_SYNC set and we fail to construct the
segment. But why do we want to construct a segment if we don't commit?
I guess what I'm asking is why don't we have a separate
nilfs_transaction_abort() function that can't fail for the erroneous
case to avoid this double error value tracking thing?
This does the separation and renames nilfs_transaction_end() to
nilfs_transaction_commit() for clarification.
Since, some calls of these functions were used just for exclusion control
against the segment constructor, they are replaced with semaphore
operations.
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/mdt.c')
| -rw-r--r-- | fs/nilfs2/mdt.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c index 6ab847578615..e0a632b86feb 100644 --- a/fs/nilfs2/mdt.c +++ b/fs/nilfs2/mdt.c @@ -123,7 +123,10 @@ static int nilfs_mdt_create_block(struct inode *inode, unsigned long block, brelse(bh); failed_unlock: - nilfs_transaction_end(sb, !err); + if (likely(!err)) + err = nilfs_transaction_commit(sb); + else + nilfs_transaction_abort(sb); if (writer) nilfs_put_writer(nilfs); out: |