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authorJan Kara <jack@suse.cz>2017-05-29 20:24:55 +0300
committerTheodore Ts'o <tytso@mit.edu>2017-05-29 20:24:55 +0300
commit67a7d5f561f469ad2fa5154d2888258ab8e6df7c (patch)
treeaa5b273ba62c4a0301dae73d13978a5e8217e16c /fs/ext4/extents.c
parenta056bdaae7a181f7dcc876cfab2f94538e508709 (diff)
downloadlinux-67a7d5f561f469ad2fa5154d2888258ab8e6df7c.tar.xz
ext4: fix fdatasync(2) after extent manipulation operations
Currently, extent manipulation operations such as hole punch, range zeroing, or extent shifting do not record the fact that file data has changed and thus fdatasync(2) has a work to do. As a result if we crash e.g. after a punch hole and fdatasync, user can still possibly see the punched out data after journal replay. Test generic/392 fails due to these problems. Fix the problem by properly marking that file data has changed in these operations. CC: stable@vger.kernel.org Fixes: a4bb6b64e39abc0e41ca077725f2a72c868e7622 Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents.c')
-rw-r--r--fs/ext4/extents.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 83a513efc824..3e36508610b7 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4877,6 +4877,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
/* Zero out partial block at the edges of the range */
ret = ext4_zero_partial_blocks(handle, inode, offset, len);
+ if (ret >= 0)
+ ext4_update_inode_fsync_trans(handle, inode, 1);
if (file->f_flags & O_SYNC)
ext4_handle_sync(handle);
@@ -5563,6 +5565,7 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
ext4_handle_sync(handle);
inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
+ ext4_update_inode_fsync_trans(handle, inode, 1);
out_stop:
ext4_journal_stop(handle);
@@ -5736,6 +5739,8 @@ int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
up_write(&EXT4_I(inode)->i_data_sem);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
+ if (ret >= 0)
+ ext4_update_inode_fsync_trans(handle, inode, 1);
out_stop:
ext4_journal_stop(handle);