1) This pattern is repeated in several seek_data/hole tests
(e.g. generic/285, generic/436, generic/445 generic/448)
and generic/009. A common _ext4_disable_extent_zeroout()
helper could be added and applied by generic/009 and
_require_seek_data_hole().
2) On some old kernels(e.g. v3.1-v3.6), when vfs recognizes
SEEK_DATA/HOLE flag && ext4 has no extent zeroout tunable
in sysfs, these cases may trigger "sysfs entry not found"
issue. We can add check if extent_max_zeroout_kb exists
on ext4 filesystem.
The extent_max_zeroout_kb is introduced by:
'67a5da564f97 ("ext4: make the zero-out chunk size tunable")'
3) Declare several vars as local in _require_seek_data_hole().
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Check that we get -ENXIO if the user calls SEEK_HOLE/SEEK_DATA with
a negative file offset.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Xiao Yang
Darrick J. Wong