[PATCH v2 4/6] overlay/017: create helpers to record and check inode numbers

Amir Goldstein
2017-04-28T08:24:47Z

Use helpers to records and check inode numbers so we can repeat
the same test after rename and mount cycle.

Suggested-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
tests/overlay/017 | 57 ++++++++++++++++++++++++++++++++++++++++---------------
1 file changed, 42 insertions(+), 15 deletions(-)

diff --git a/tests/overlay/017 b/tests/overlay/017
index 779907d..3ff429f 100755
--- a/tests/overlay/017
+++ b/tests/overlay/017
@@ -72,32 +72,59 @@ mknod $lowerdir/blkdev b 1 1
mknod $lowerdir/fifo p
$here/src/af_unix $lowerdir/socket

+FILES="dir file symlink chrdev blkdev fifo socket"
+
+# Record inode numbers in format <ino> <basename>
+function record_inode_numbers()
+{
+ dir=$1
+ outfile=$2
+
+ for f in $FILES; do
+ ls -id $dir/$f
+ done | \
+ while read ino file; do
+ echo $ino `basename $file` >> $outfile
+ done
+}
+
+# Check inode numbers match recorder inode numbers
+function check_inode_numbers()
+{
+ dir=$1
+ before=$2
+ after=$2
+
+ record_inode_numbers $dir $after
+
+ # Test constant stat(2) st_ino -
+ # Compare before..after - expect silence
+ # We use diff -u so out.bad will tell us which stage failed
+ diff -u $before $after
+
+ # Test constant readdir(3)/getdents(2) d_ino -
+ # Expect to find file by inode number
+ cat $before | while read ino f; do
+ find $dir/ -maxdepth 1 -inum $ino | grep -q $f || \
+ echo "$f not found by ino $ino (from $before)"
+ done
+}

_scratch_mount

rm -f $tmp.*

-# Test stable stat(2) st_ino
+# Record inode numbers before copy up
+record_inode_numbers $SCRATCH_MNT $tmp.before

-# Record inode numbers before and after copy up
-for f in dir file symlink chrdev blkdev fifo socket; do
- ls -id $SCRATCH_MNT/$f >> $tmp.before
+for f in $FILES; do
# chown -h modifies all those file types
chown -h 100 $SCRATCH_MNT/$f
- ls -id $SCRATCH_MNT/$f >> $tmp.after
-done
-
-# Test stable readdir(3)/getdents(2) d_ino
-
-# find by inode number - expect to find file by inode number
-cat $tmp.before | while read ino f; do
- find $SCRATCH_MNT/ -maxdepth 1 -inum $ino | grep -q $f || \
- echo "$f not found by ino $ino"
done

-# Compare before..after - expect silence
-diff $tmp.before $tmp.after
+# Compare inode numbers before/after copy up
+check_inode_numbers $SCRATCH_MNT $tmp.before $tmp.after_copyup

echo "Silence is golden"
status=0
--
2.7.4