On Wed, Nov 15, 2017 at 07:54:19PM +0800, Eryu Guan wrote:
> Currently, fallocate(2) with KEEP_SIZE followed by a fdatasync(2)
> then crash, we'll see wrong allocated block number (stat -c %b), the
> blocks allocated beyond EOF are all lost. fstests generic/468
> exposes this bug.
>
> Commit 67a7d5f561f4 ("ext4: fix fdatasync(2) after extent
> manipulation operations") fixed all the other extent manipulation
> operation paths such as hole punch, zero range, collapse range etc.,
> but forgot the fallocate case.
>
> So similarly, fix it by recording the correct journal tid in ext4
> inode in fallocate(2) path, so that ext4_sync_file() will wait for
> the right tid to be committed on fdatasync(2).
>
> Signed-off-by: Eryu Guan <eguan@xxxxxxxxxx>
Thanks, applied.
- Ted
