features/shard: Use fd lookup post file open

Issue:
When a process has the open fd and the same file is
unlinked in middle of the operations, then file based
lookup fails with ENOENT or stale file

Solution:
When the file already open and fd is available, use fstat
to get the file attributes

Change-Id: I0e83aee9f11b616dcfe13769ebfcda6742e4e0f4
Fixes: #1281
Signed-off-by: Vinayakswami Hariharmath <vharihar@redhat.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/bugs/shard/issue-1281.t b/tests/bugs/shard/issue-1281.t
new file mode 100644
index 00000000000..9704caa8944
--- /dev/null
+++ b/tests/bugs/shard/issue-1281.t
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/${V0}{0,1}
+TEST $CLI volume set $V0 features.shard on
+TEST $CLI volume set $V0 performance.quick-read off
+TEST $CLI volume set $V0 performance.io-cache off
+TEST $CLI volume set $V0 performance.read-ahead off
+TEST $CLI volume set $V0 performance.write-behind off
+TEST $CLI volume start $V0
+
+TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0
+
+#Open a file and store descriptor in fd = 5
+exec 5>$M0/foo
+
+#Unlink the same file which is opened in prev step
+TEST unlink $M0/foo
+
+#Write something on the file using the open fd = 5
+echo "issue-1281" >&5
+
+#Write on the descriptor should be succesful
+EXPECT 0 echo $?
+
+#Close the fd = 5
+exec 5>&-
+
+cleanup