[PATCH v3 3/3] generic/260: f2fs is also special

[Sun Ke <sunke32@huawei.com>]

It fail on f2fs:

 [+] Default length with start set (should succeed)
 [+] Length beyond the end of fs (should succeed)
 [+] Length beyond the end of fs with start set (should succeed)
+After the full fs discard 0 bytes were discarded however the file system is 12882804736 bytes long.
+It seems that fs logic handling len argument overflows

The root cause is f2fs can tag a special flag TRIMMED_FLAG to indicate
the whole filesystem is trimmed, so after mkfs/fstrim(), following
fstrim() won't trim any block.

Suggested-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Sun Ke <sunke32@huawei.com>
---
 tests/generic/260 | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tests/generic/260 b/tests/generic/260
index 8d6d6c79a5c1..b15b4e570bd1 100755
--- a/tests/generic/260
+++ b/tests/generic/260
@@ -95,7 +95,10 @@ fi
 # It is because btrfs does not have not-yet-used parts of the device
 # mapped and since we got here right after the mkfs, there is not
 # enough free extents in the root tree.
-if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ]; then
+# F2fs is also special. F2fs can tag a special flag TRIMMED_FLAG to
+# indicate the whole filesystem is trimmed, so after mkfs/fstrim(),
+# following fstrim() won't trim any block.
+if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ] && [ $FSTYP != "f2fs" ]; then
 	status=1
 	echo "After the full fs discard $bytes bytes were discarded"\
 	     "however the file system is $(_math "$fssize*1024") bytes long."
@@ -154,8 +157,11 @@ _scratch_mount
 # It is because btrfs does not have not-yet-used parts of the device
 # mapped and since we got here right after the mkfs, there is not
 # enough free extents in the root tree.
+# F2fs is also special. F2fs can tag a special flag TRIMMED_FLAG to
+# indicate the whole filesystem is trimmed, so after mkfs/fstrim(),
+# following fstrim() won't trim any block.
 bytes=$($FSTRIM_PROG -v -l$len $SCRATCH_MNT | _filter_fstrim)
-if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ]; then
+if [ $bytes -le $(_math "$fssize*512") ] && [ $FSTYP != "btrfs" ] && [ $FSTYP != "f2fs" ]; then
 	status=1
 	echo "It seems that fs logic handling len argument overflows"
 fi
-- 
2.25.4