md-cache: Do not invalidate cache post set/remove xattr

Since setxattr and removexattr fops cbk do not carry poststat,
the stat cache was being invalidated in setxatr/remoxattr cbk.
Hence the further lookup wouldn't be served from cache.
To prevent this invalidation, md-cache is modified to get
the poststat in set/removexattr_cbk in dict.

Co-authored with Xavi Hernandez.

Change-Id: I6b946be2d20b807e2578825743c25ba5927a60b4
fixes: bz#1586018
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
Signed-off-by: Poornima G <pgurusid@redhat.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/bugs/md-cache/setxattr-prepoststat.t b/tests/bugs/md-cache/setxattr-prepoststat.t
new file mode 100755
index 00000000000..01fa768299c
--- /dev/null
+++ b/tests/bugs/md-cache/setxattr-prepoststat.t
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+cleanup;
+
+## 1. Start glusterd
+TEST glusterd;
+
+## 2. Lets create volume
+TEST $CLI volume create $V0 disperse 6 redundancy 2 $H0:$B0/${V0}{0..5}
+
+TEST $CLI volume set $V0 group metadata-cache
+TEST $CLI volume set $V0 performance.xattr-cache-list "user.*"
+TEST $CLI volume start $V0
+
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M1
+
+TEST touch $M0/file1
+TEST `echo "abakjshdjahskjdhakjhdskjac" >> $M0/file1`
+size=`stat -c '%s' $M0/file1`
+
+## Setxattr from mount-0
+TEST "setfattr -n user.DOSATTRIB -v "abc" $M0/file1"
+EXPECT $size stat -c '%s' $M0/file1
+
+## Getxattr from mount-1, this should return the correct value
+TEST "getfattr -n user.DOSATTRIB $M1/file1 | grep -q abc"
+
+TEST "setfattr -x user.DOSATTRIB $M1/file1"
+EXPECT $size stat -c '%s' $M1/file1
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M1
+
+cleanup;