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overlay/018: Add constant d_ino test

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Constant d_ino for hardlinks is possible only when "index" config
feature/mount option is enabled.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Chandan Rajendra
2017-11-18 11:28:03 +05:30
committed by Eryu Guan
parent 0d84683743
commit fac0e790c8
1 changed files with 15 additions and 6 deletions
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tests/overlay/018
+15 -6
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@@ -50,6 +50,7 @@ _supported_fs overlay
_supported_os Linux
_require_scratch
_require_scratch_feature index
_require_test_program "t_dir_type"
rm -f $seqres.full
@@ -65,14 +66,15 @@ ln $lowerdir/foo $lowerdir/bar
# Record inode numbers in format <ino> <nlink>
function record_ino_nlink()
{
ls -li $FILES | awk '{ print $1, $3 }' > $1
ls -li $FILES | awk '{ print $1, $3, $10}' > $1
}
# Check inode numbers match recorded inode numbers
function check_ino_nlink()
{
before=$1
after=$2
dir=$1
before=$2
after=$3
record_ino_nlink $after
@@ -80,6 +82,13 @@ function check_ino_nlink()
# 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 nlink f; do
$here/src/t_dir_type $dir $ino | grep -q $(basename $f) || \
echo "$(basename $f) not found by ino $ino (from $before)"
done
}
# Enable overlay index feature to prevent breaking hardlinks on copy up
@@ -104,14 +113,14 @@ echo "one" >> $bar
echo "== After write one =="
cat $FILES
check_ino_nlink $tmp.before $tmp.after_one
check_ino_nlink $SCRATCH_MNT $tmp.before $tmp.after_one
# Verify that the hardlinks survive a mount cycle
_scratch_cycle_mount index=on
echo "== After mount cycle =="
cat $FILES
check_ino_nlink $tmp.after_one $tmp.after_cycle
check_ino_nlink $SCRATCH_MNT $tmp.after_one $tmp.after_cycle
# Drop caches to get the copied up hardlink out of cache
echo 3 > /proc/sys/vm/drop_caches
@@ -121,7 +130,7 @@ echo "two" >> $foo
echo "== After write two =="
cat $FILES
check_ino_nlink $tmp.after_one $tmp.after_two
check_ino_nlink $SCRATCH_MNT $tmp.after_one $tmp.after_two
status=0
exit