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authorTheodore Ts'o <tytso@mit.edu>2009-04-03 01:34:35 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-04-03 01:34:35 -0400
commitf7ab34ea723ed304b19698efca85d6f40cecd99b (patch)
tree28a609a654a24bc40d694fd2ec87a1f785c97c79 /fs/ext3/inode.c
parent512a004382f2c60d5c4f855476ba965adc00250c (diff)
ext3: Add replace-on-truncate hueristics for data=writeback mode
In data=writeback mode, start an asynchronous flush when closing a file which had been previously truncated down to zero. This lowers the probability of data loss in the case of applications that attempt to replace a file using truncate. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext3/inode.c')
-rw-r--r--fs/ext3/inode.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 5fa453b49a6..0f5bca0d82f 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -2346,6 +2346,9 @@ void ext3_truncate(struct inode *inode)
if (!ext3_can_truncate(inode))
return;
+ if (inode->i_size == 0 && ext3_should_writeback_data(inode))
+ ei->i_state |= EXT3_STATE_FLUSH_ON_CLOSE;
+
/*
* We have to lock the EOF page here, because lock_page() nests
* outside journal_start().