gfapi: APIs to store and process upcall notifications received

In case of any upcall cbk events received by the protocol/client,
gfapi will be notified which queues them up in a list (<gfapi_cbk_upcall>).

Applicatons are responsible to provide APIs to process & notify them in case
of any such upcall events queued.

Added a new API which will be used by Ganesha to repeatedly poll for any
such upcall event notified (<glfs_h_poll_upcall>).

A new test-file has been added to test the cache_invalidation upcall events.

Below link has a writeup which explains the code changes done -
        URL: https://soumyakoduri.wordpress.com/2015/02/25/glusterfs-understanding-upcall-infrastructure-and-cache-invalidation-support/

Change-Id: Iafc6880000c865fd4da22d0cfc388ec135b5a1c5
BUG: 1200262
Signed-off-by: Soumya Koduri <skoduri@redhat.com>
Reviewed-on: http://review.gluster.org/9536
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/basic/gfapi/upcall-cache-invalidate.sh b/tests/basic/gfapi/upcall-cache-invalidate.sh
new file mode 100755
index 00000000000..20aeb1ec27a
--- /dev/null
+++ b/tests/basic/gfapi/upcall-cache-invalidate.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+cleanup;
+
+# Upcall feature is disable for now. A new xlator option
+# will be introduced to turn it on. Skipping this test
+# till then.
+
+SKIP_TESTS;
+exit 0
+
+TEST glusterd
+
+TEST $CLI volume create $V0 localhost:$B0/brick1;
+EXPECT 'Created' volinfo_field $V0 'Status';
+
+TEST $CLI volume start $V0;
+EXPECT 'Started' volinfo_field $V0 'Status';
+
+logdir=`gluster --print-logdir`
+
+build_tester $(dirname $0)/upcall-cache-invalidate.c -lgfapi -o $(dirname $0)/upcall-cache-invalidate
+
+TEST ./$(dirname $0)/upcall-cache-invalidate $V0  $logdir/upcall-cache-invalidate.log
+
+cleanup_tester $(dirname $0)/upcall-cache-invalidate
+
+TEST $CLI volume stop $V0
+TEST $CLI volume delete $V0
+
+cleanup;