The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 67a7d5f561f469ad2fa5154d2888258ab8e6df7c Mon Sep 17 00:00:00 2001 From: Jan Kara <jack@xxxxxxx> Date: Mon, 29 May 2017 13:24:55 -0400 Subject: [PATCH] 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@xxxxxxxxxxxxxxx Fixes: a4bb6b64e39abc0e41ca077725f2a72c868e7622 Signed-off-by: Jan Kara <jack@xxxxxxx> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> 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); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 657a98fa80b6..5cf82d03968c 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4218,6 +4218,8 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length) inode->i_mtime = inode->i_ctime = current_time(inode); ext4_mark_inode_dirty(handle, inode); + if (ret >= 0) + ext4_update_inode_fsync_trans(handle, inode, 1); out_stop: ext4_journal_stop(handle); out_dio: