[CRIU] [PATCH] test: Add inotify02

[Andrew Vagin]

On Wed, Oct 21, 2015 at 10:28:56AM +0300, Cyrill Gorcunov wrote:
> 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 at openvz.org>
> ---
>  test/zdtm.sh                         |   1 +
>  test/zdtm/live/static/inotify02.c    | 101 +++++++++++++++++++++++++++++++++++
>  test/zdtm/live/static/inotify02.desc |   1 +

You forgot to add the test into Makefile

>  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 25e27ade786e..691e041d279a 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 000000000000..9e2c5f76c1bf
> --- /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 at 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 000000000000..95c58b4018b3
> --- /dev/null
> +++ b/test/zdtm/live/static/inotify02.desc
> @@ -0,0 +1 @@
> +{'flags': 'noauto'}
> -- 
> 2.4.3
>