[LTP] [PATCH v4 10/11] Add wqueue08 test

[Andrea Cervesato <andrea.cervesato@suse.de>]

This test is testing WATCH_META_REMOVAL_NOTIFICATION event

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
 testcases/kernel/watchqueue/wqueue08.c | 44 ++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 testcases/kernel/watchqueue/wqueue08.c

diff --git a/testcases/kernel/watchqueue/wqueue08.c b/testcases/kernel/watchqueue/wqueue08.c
new file mode 100644
index 000000000..a8e01fbd2
--- /dev/null
+++ b/testcases/kernel/watchqueue/wqueue08.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Test if key watch removal is correctly recognized by watch queue.
+ */
+
+#include "tst_test.h"
+#include "lapi/keyctl.h"
+#include "common.h"
+
+static void saw_watch_removal(struct watch_notification *n, LTP_ATTRIBUTE_UNUSED size_t len, unsigned int wtype)
+{
+	if (wtype != WATCH_TYPE_META)
+		return;
+
+	if (n->subtype == WATCH_META_REMOVAL_NOTIFICATION)
+		tst_res(TPASS, "Meta removal notification received");
+	else
+		tst_res(TFAIL, "Event not recognized");
+}
+
+static void run(void)
+{
+	int fd;
+	key_serial_t key;
+
+	fd = wqueue_watch(256, &wqueue_filter);
+	key = wqueue_add_key(fd);
+
+	/* if watch_id = -1 key is removed from the watch queue */
+	keyctl(KEYCTL_WATCH_KEY, key, fd, -1);
+	wqueue_consumer(fd, saw_watch_removal);
+
+	SAFE_CLOSE(fd);
+}
+
+static struct tst_test test = {
+	.test_all = run,
+};
-- 
2.34.1


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