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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-04-06 19:01:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 08:31:17 -0700
commit47420c799830d4676e544dbec56b2a7f787528f5 (patch)
treedd61f6c96942b07f762129c893d9cbbbeff60735 /fs/nilfs2/mdt.c
parenta2e7d2df82cafb76f76809ddf6e2caa8afe4f75e (diff)
downloadlinux-47420c799830d4676e544dbec56b2a7f787528f5.tar.gz
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.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 6ab84757861..e0a632b86fe 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: