[CRIU] [PATCH 5/5] test: Add unlink_dir test

[Cyrill Gorcunov]

To check ghost directories cleanup.

Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>
---
 test/zdtm/static/Makefile     |   1 +
 test/zdtm/static/unlink_dir.c | 150 ++++++++++++++++++++++++++++++++++
 2 files changed, 151 insertions(+)
 create mode 100644 test/zdtm/static/unlink_dir.c

diff --git a/test/zdtm/static/Makefile b/test/zdtm/static/Makefile
index a31c202d5409..303ed7d40ffe 100644
--- a/test/zdtm/static/Makefile
+++ b/test/zdtm/static/Makefile
@@ -345,6 +345,7 @@ TST_DIR		=				\
 		private_bind_propagation	\
 		ghost_on_rofs			\
 		overmounted_file		\
+		unlink_dir			\
 
 TST_DIR_FILE	=				\
 		chroot				\
diff --git a/test/zdtm/static/unlink_dir.c b/test/zdtm/static/unlink_dir.c
new file mode 100644
index 000000000000..86a627f6405d
--- /dev/null
+++ b/test/zdtm/static/unlink_dir.c
@@ -0,0 +1,150 @@
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <linux/limits.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check cleanup order of ghost directory and files inside";
+const char *test_author	= "Cyrill Gorcunov <gorcunov at gmail.com>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+int main(int argc, char ** argv)
+{
+	int dirfd1, dirfd2, dirfd2_dup, dirfd3, dirfd4;
+	char path_dir1[PATH_MAX];
+	char path_dir2[PATH_MAX];
+	char path_dir3[PATH_MAX];
+	char path_dir4[PATH_MAX];
+
+	/* Order does matter */
+	char *path_dirs[] = {
+		path_dir4,
+		path_dir3,
+		path_dir2,
+		path_dir1,
+	};
+
+	char path[PATH_MAX];
+	int fds[4], i;
+
+	int lo = ARRAY_SIZE(fds) / 2;
+	int hi = ARRAY_SIZE(fds);
+
+	test_init(argc, argv);
+
+	if (mkdir(dirname, 0700) < 0) {
+		pr_perror("Can't create directory %s", dirname);
+		return 1;
+	}
+
+	ssprintf(path_dir1, "%s/%s", dirname, "gd1");
+	if (mkdir(path_dir1, 0700) < 0) {
+		pr_perror("Can't create directory %s", path_dir1);
+		return 1;
+	}
+
+	ssprintf(path_dir2, "%s/%s/%s", dirname, "gd1", "gd2");
+	if (mkdir(path_dir2, 0700) < 0) {
+		pr_perror("Can't create directory %s", path_dir2);
+		return 1;
+	}
+
+	ssprintf(path_dir3, "%s/%s/%s/%s", dirname, "gd1", "gd2", "gd3");
+	if (mkdir(path_dir3, 0700) < 0) {
+		pr_perror("Can't create directory %s", path_dir3);
+		return 1;
+	}
+
+	ssprintf(path_dir4, "%s/%s/%s/%s/%s", dirname, "gd1", "gd2", "gd3", "gd4");
+	if (mkdir(path_dir4, 0700) < 0) {
+		pr_perror("Can't create directory %s", path_dir4);
+		return 1;
+	}
+
+	for (i = 0; i < lo; i++) {
+		ssprintf(path, "%s/%d", path_dir1, i);
+		fds[i] = open(path, O_RDONLY | O_CREAT | O_TRUNC);
+		if (fds[i] < 0) {
+			pr_perror("Can't open %s", path);
+			return 1;
+		}
+		if (unlink(path)) {
+			pr_perror("Can't unlink %s", path);
+			return 1;
+		}
+	}
+
+	dirfd2 = open(path_dir2, O_RDONLY | O_DIRECTORY);
+	if (dirfd2 < 0) {
+		pr_perror("Can't open %s", path_dir2);
+		return 1;
+	}
+
+	dirfd2_dup = dup(dirfd2);
+	if (dirfd2_dup < 0) {
+		pr_perror("Can't dup on %s\n", path_dir2);
+		return 1;
+	}
+
+	dirfd3 = open(path_dir3, O_RDONLY | O_DIRECTORY);
+	if (dirfd3 < 0) {
+		pr_perror("Can't open %s", path_dir3);
+		return 1;
+	}
+	close(dirfd3);
+
+	dirfd4 = open(path_dir4, O_RDONLY | O_DIRECTORY);
+	if (dirfd4 < 0) {
+		pr_perror("Can't open %s", path_dir4);
+		return 1;
+	}
+
+	for (i = lo; i < hi; i++) {
+		ssprintf(path, "%s/%d", path_dir2, i);
+		fds[i] = open(path, O_RDONLY | O_CREAT | O_TRUNC);
+		if (fds[i] < 0) {
+			pr_perror("Can't open %s", path);
+			return 1;
+		}
+		if (unlink(path)) {
+			pr_perror("Can't unlink %s", path);
+			return 1;
+		}
+	}
+
+	dirfd1 = open(path_dir1, O_RDONLY | O_DIRECTORY);
+	if (dirfd1 < 0) {
+		pr_perror("Can't open %s", path_dir1);
+		return 1;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(path_dirs); i++) {
+		if (rmdir(path_dirs[i])) {
+			pr_perror("Can't rmdir %s", path_dirs[i]);
+			return 1;
+		}
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	for (i = 0; i < ARRAY_SIZE(path_dirs); i++) {
+		if (access(path_dirs[i], F_OK)) {
+			if (errno == ENOENT)
+				continue;
+			fail("Unexpected error on %s", path_dirs[i]);
+			exit(1);
+		}
+	}
+	pass();
+	return 0;
+}
-- 
2.20.1