From 2a250921522944debf4ed95a3a83c999bb31c91c Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Wed, 21 Oct 2015 10:28:00 +0300
Subject: [PATCH] test: Add inotify02

Its only purpose if to verify that we can show up
a huge number of inotify in fdoutput (before
the kernel v3.18-rc1-7-ga3816ab we can show
only handles which fit page size in summary).

In particular we revealed that hald daemon makes
up to 35 notification marks which kernel can't
show up in a one pass and dump fails.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
---
 test/zdtm.sh                         |   1 +
 test/zdtm/live/static/inotify02.c    | 101 +++++++++++++++++++++++++++
 test/zdtm/live/static/inotify02.desc |   1 +
 3 files changed, 103 insertions(+)
 create mode 100644 test/zdtm/live/static/inotify02.c
 create mode 100644 test/zdtm/live/static/inotify02.desc

diff --git a/test/zdtm.sh b/test/zdtm.sh
index 93f32ce4e..6966cecdc 100755
--- a/test/zdtm.sh
+++ b/test/zdtm.sh
@@ -100,6 +100,7 @@ generate_test_list()
 		static/eventfs00
 		static/signalfd00
 		static/inotify00
+		static/inotify02
 		static/inotify_irmap
 		static/fanotify00
 		static/unbound_sock
diff --git a/test/zdtm/live/static/inotify02.c b/test/zdtm/live/static/inotify02.c
new file mode 100644
index 000000000..9e2c5f76c
--- /dev/null
+++ b/test/zdtm/live/static/inotify02.c
@@ -0,0 +1,101 @@
+#define _GNU_SOURCE
+
+#include <unistd.h>
+#include <limits.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <signal.h>
+#include <sched.h>
+#include <sys/mount.h>
+#include <sys/prctl.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check for inotify file-handles storm";
+const char *test_author	= "Cyrill Gorcunov <gorcunov@openvz.org>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+static int num_of_handles(int fd)
+{
+	char path[64];
+	char buf[512];
+	int ret = 0;
+	FILE *f;
+
+	snprintf(path, sizeof(path), "/proc/self/fdinfo/%d", fd);
+	f = fopen(path, "r");
+	if (!f) {
+		err("Can't open %s", path);
+		return -1;
+	}
+
+	while (fgets(buf, sizeof(buf), f)) {
+		if (memcmp(buf, "inotify ", 8))
+			continue;
+		ret++;
+	}
+
+	fclose(f);
+	return ret;
+}
+
+int main (int argc, char *argv[])
+{
+	const unsigned int mask = IN_DELETE | IN_CLOSE_WRITE | IN_DELETE_SELF | IN_CREATE;
+	const int nr_dirs = 64;
+	char temp[nr_dirs][16];
+	char path[PATH_MAX];
+	int fd, i;
+
+	test_init(argc, argv);
+
+	if (mkdir(dirname, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)) {
+		err("Can't create directory %s", dirname);
+		exit(1);
+	}
+
+	fd = inotify_init1(IN_NONBLOCK);
+	if (fd < 0) {
+		err("inotify_init failed");
+		exit(1);
+	}
+
+	for (i = 0; i < nr_dirs; i++) {
+		snprintf(temp[i], sizeof(temp[0]), "d.%03d", i);
+		snprintf(path, sizeof(path), "%s/%s", dirname, temp[i]);
+		if (mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH)) {
+			err("Can't create %s", path);
+			exit(1);
+		}
+
+		if (inotify_add_watch(fd, path, mask) < 0) {
+			err("inotify_add_watch failed on %s", path);
+			exit(1);
+		}
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	i = num_of_handles(fd);
+	close(fd);
+
+	if (i < nr_dirs)
+		fail("Expected %d handles but got %d", nr_dirs, i);
+	else
+		pass();
+
+	return 0;
+}
diff --git a/test/zdtm/live/static/inotify02.desc b/test/zdtm/live/static/inotify02.desc
new file mode 100644
index 000000000..95c58b401
--- /dev/null
+++ b/test/zdtm/live/static/inotify02.desc
@@ -0,0 +1 @@
+{'flags': 'noauto'}