unix: test -- Add sk-unix01 test

To test the case where sockets are removed
together with directory they are living in.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm/static/Makefile

@@ -332,6 +332,7 @@ TST_DIR		=				\
 		autofs				\
 		del_standalone_un		\
 		sk-unix-mntns			\
+		sk-unix01			\
 
 TST_DIR_FILE	=				\
 		chroot				\

test/zdtm/static/sk-unix01.c

+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <errno.h>
+#include <dirent.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check that deleted unix sockets with dirs are restored correctly";
+const char *test_author	= "Cyrill Gorcunov <gorcunov@openvz.org>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+static int fill_sock_name(struct sockaddr_un *name, const char *filename)
+{
+	char *cwd;
+
+	cwd = get_current_dir_name();
+	if (strlen(filename) + strlen(cwd) + 1 >= sizeof(name->sun_path)) {
+		pr_err("Name %s/%s is too long for socket\n",
+		       cwd, filename);
+		return -1;
+	}
+
+	name->sun_family = AF_LOCAL;
+	ssprintf(name->sun_path, "%s/%s", cwd, filename);
+	return 0;
+}
+
+static int sk_alloc_bind(int type, struct sockaddr_un *addr)
+{
+	int sk;
+
+	sk = socket(PF_UNIX, type, 0);
+	if (sk < 0) {
+		pr_perror("socket");
+		return -1;
+	}
+
+	if (addr && bind(sk, (const struct sockaddr *)addr, sizeof(*addr))) {
+		pr_perror("bind %s", addr->sun_path);
+		close(sk);
+		return -1;
+	}
+
+	return sk;
+}
+
+static int sk_alloc_connect(int type, struct sockaddr_un *addr)
+{
+	int sk;
+
+	sk = socket(PF_UNIX, type, 0);
+	if (sk < 0) {
+		pr_perror("socket");
+		return -1;
+	}
+
+	if (connect(sk, (const struct sockaddr *)addr, sizeof(*addr))) {
+		pr_perror("connect %s", addr->sun_path);
+		close(sk);
+		return -1;
+	}
+
+	return sk;
+}
+
+int main(int argc, char **argv)
+{
+	int c1 = 1, c2 = 0, c3 = 3, c4 = 0;
+	int c5 = 5, c6 = 0, c7 = 7, c8 = 0;
+	int c9 = 8, c10 = 0;
+	char filename[PATH_MAX];
+	char subdir_dg[PATH_MAX];
+	char subdir_st[PATH_MAX];
+	struct sockaddr_un addr_from;
+	struct sockaddr_un addr;
+	int sk_dgram_pair[2];
+	int sk_dgram[9];
+	socklen_t len;
+	int sk_st[5];
+	DIR *dir;
+
+	test_init(argc, argv);
+
+	/*
+	 * All sockets are under dir to not clash
+	 * with other tests.
+	 */
+	if (mkdir(dirname, 0755) < 0) {
+		if (errno != EEXIST) {
+			pr_perror("Can't create %s", dirname);
+			return 1;
+		}
+	}
+
+	/*
+	 * Subdir for dgram sockets.
+	 */
+	ssprintf(subdir_dg, "%s/%s", dirname, "dg");
+	if (mkdir(subdir_dg, 0755) < 0) {
+		if (errno != EEXIST) {
+			pr_perror("Can't create %s", subdir_dg);
+			return 1;
+		}
+	}
+
+	/*
+	 * Subdir for stream sockets.
+	 */
+	ssprintf(subdir_st, "%s/%s", dirname, "st");
+	if (mkdir(subdir_st, 0755) < 0) {
+		if (errno != EEXIST) {
+			pr_perror("Can't create %s", subdir_st);
+			return 1;
+		}
+	}
+
+	/*
+	 * DGRAM sockets
+	 *
+	 *  - create 2 sockets
+	 *  - bind first to subdired
+	 *  - connect second to it
+	 *  - delete socket on fs
+	 *  - do the same for second pair with same name
+	 *  - delete socket on fs
+	 *  - create 3 more sockets
+	 *  - bind /connect to same name, where one is deleted
+	 */
+
+	ssprintf(filename, "%s/%s", subdir_dg, "sk-dt");
+	if (fill_sock_name(&addr, filename) < 0) {
+		pr_err("%s is too long for socket\n", filename);
+		return 1;
+	}
+	unlink(addr.sun_path);
+
+	sk_dgram[0] = sk_alloc_bind(SOCK_DGRAM, &addr);
+	if (sk_dgram[0] < 0)
+		return 1;
+	test_msg("sk-dt: alloc/bind %d %s\n", sk_dgram[0], addr.sun_path);
+
+	sk_dgram[1] = sk_alloc_connect(SOCK_DGRAM, &addr);
+	if (sk_dgram[1] < 0)
+		return 1;
+	unlink(addr.sun_path);
+	test_msg("sk-dt: alloc/connect/unlink %d %s\n", sk_dgram[1], addr.sun_path);
+
+	sk_dgram[2] = sk_alloc_bind(SOCK_DGRAM, &addr);
+	if (sk_dgram[2] < 0)
+		return 1;
+	test_msg("sk-dt: alloc/bind %d %s\n", sk_dgram[2], addr.sun_path);
+
+	sk_dgram[3] = sk_alloc_connect(SOCK_DGRAM, &addr);
+	if (sk_dgram[3] < 0)
+		return 1;
+	unlink(addr.sun_path);
+	test_msg("sk-dt: alloc/connect/unlink %d %s\n", sk_dgram[3], addr.sun_path);
+
+	ssprintf(filename, "%s/%s", dirname, "sole");
+	if (fill_sock_name(&addr, filename) < 0) {
+		pr_err("%s is too long for socket\n", filename);
+		return 1;
+	}
+	unlink(addr.sun_path);
+
+	sk_dgram[4] = sk_alloc_bind(SOCK_DGRAM, &addr);
+	if (sk_dgram[4] < 0)
+		return 1;
+	test_msg("sk-dt: alloc/bind %d %s\n", sk_dgram[4], addr.sun_path);
+
+	sk_dgram[5] = sk_alloc_connect(SOCK_DGRAM, &addr);
+	if (sk_dgram[5] < 0)
+		return 1;
+	unlink(addr.sun_path);
+	test_msg("sk-dt: alloc/connect/unlink %d %s\n", sk_dgram[5], addr.sun_path);
+
+	sk_dgram[6] = sk_alloc_bind(SOCK_DGRAM, &addr);
+	if (sk_dgram[6] < 0)
+		return 1;
+	test_msg("sk-dt: alloc/bind %d %s\n", sk_dgram[6], addr.sun_path);
+
+	sk_dgram[7] = sk_alloc_connect(SOCK_DGRAM, &addr);
+	if (sk_dgram[7] < 0)
+		return 1;
+	unlink(addr.sun_path);
+	test_msg("sk-dt: alloc/connect/unlink %d %s\n", sk_dgram[7], addr.sun_path);
+
+	sk_dgram[8] = sk_alloc_bind(SOCK_DGRAM, &addr);
+	if (sk_dgram[8] < 0)
+		return 1;
+	test_msg("sk-dt: alloc/bind %d %s\n", sk_dgram[8], addr.sun_path);
+
+	if (dup2(sk_dgram[4], 110) < 0 || dup2(sk_dgram[6], 100) < 0) {
+		pr_perror("Can't move socket");
+		return 1;
+	}
+	close(sk_dgram[4]);
+	sk_dgram[4] = 110;
+	close(sk_dgram[6]);
+	sk_dgram[6] = 100;
+
+	/*
+	 * DGRAM paired sockets. Just bind both to the same name.
+	 */
+	if (socketpair(PF_UNIX, SOCK_DGRAM, 0, sk_dgram_pair)) {
+		pr_perror("Can't create dgram pair");
+		return 1;
+	}
+	test_msg("sk-dgp: sockpair %d %d\n",
+		 sk_dgram_pair[0], sk_dgram_pair[1]);
+	ssprintf(filename, "%s/%s", subdir_dg, "sk-dtp");
+
+	if (fill_sock_name(&addr, filename) < 0) {
+		pr_err("%s is too long for socket\n", filename);
+		return 1;
+	}
+
+	if (bind(sk_dgram_pair[0], (const struct sockaddr *)&addr, sizeof(addr))) {
+		pr_perror("bind %d to %s", sk_dgram_pair[0], addr.sun_path);
+		return -1;
+	}
+	unlink(addr.sun_path);
+	if (bind(sk_dgram_pair[1], (const struct sockaddr *)&addr, sizeof(addr))) {
+		pr_perror("bind %d to %s", sk_dgram_pair[1], addr.sun_path);
+		return -1;
+	}
+	unlink(addr.sun_path);
+
+	/*
+	 * Drop subdirectory.
+	 */
+	rmdir(subdir_dg);
+
+	/*
+	 * STREAM sockets
+	 *
+	 *  - create server, bind to subdired
+	 *  - create client
+	 *  - connect to server
+	 *  - delete socket on fs
+	 *  - bind again to subdired
+	 *  - connect to server
+	 *  - delete socket on fs
+	 */
+	ssprintf(filename, "%s/%s", subdir_st, "sk-st");
+	if (fill_sock_name(&addr, filename) < 0) {
+		pr_err("%s is too long for socket\n", filename);
+		return 1;
+	}
+	unlink(addr.sun_path);
+
+	sk_st[0] = sk_alloc_bind(SOCK_STREAM, &addr);
+	if (sk_st[0] < 0)
+		return 1;
+	test_msg("sk-st: alloc/bind/listen %d\n", sk_st[0]);
+
+	if (listen(sk_st[0], 16)) {
+		pr_perror("Can't listen on socket");
+		return 1;
+	}
+
+	sk_st[1] = sk_alloc_connect(SOCK_STREAM, &addr);
+	if (sk_st[1] < 0)
+		return 1;
+	test_msg("sk-st: alloc/connect %d\n", sk_st[1]);
+
+	len = sizeof(addr_from);
+	sk_st[2] = accept(sk_st[0], (struct sockaddr *)&addr_from, &len);
+	if (sk_st[2] < 0) {
+		pr_perror("Can't accept on socket");
+		return 1;
+	}
+	test_msg("sk-st: accept %d\n", sk_st[2]);
+
+	sk_st[3] = sk_alloc_connect(SOCK_STREAM, &addr);
+	if (sk_st[3] < 0)
+		return 1;
+	test_msg("sk-st: alloc/connect %d\n", sk_st[3]);
+
+	len = sizeof(addr_from);
+	sk_st[4] = accept(sk_st[0], (struct sockaddr *)&addr_from, &len);
+	if (sk_st[4] < 0) {
+		pr_perror("Can't accept on socket");
+		return 1;
+	}
+	test_msg("sk-st: accept %d\n", sk_st[4]);
+
+	unlink(addr.sun_path);
+
+	/*
+	 * Drop subdirectory.
+	 */
+	rmdir(subdir_st);
+
+	test_daemon();
+	test_waitsig();
+
+	if (write(sk_dgram[1], &c1, 1) != 1	||
+	    read(sk_dgram[0], &c2, 1) != 1	||
+	    write(sk_dgram[3], &c3, 1) != 1	||
+	    read(sk_dgram[2], &c4, 1) != 1) {
+		fail("Unable to send/receive a message on dgram");
+		return 1;
+	}
+
+	if (c1 != c2 || c3 != c4) {
+		fail("Vals mismatch on dgram: c1 %d c2 %d c3 %d c4 %d",
+		     c1, c2, c3, c4);
+		return 1;
+	}
+
+	if (write(sk_dgram_pair[1], &c9, 1) != 1 ||
+	    read(sk_dgram_pair[0], &c10, 1) != 1) {
+		fail("Unable to send/receive a message on paired dgram");
+		return 1;
+	}
+
+	if (c9 != c10) {
+		fail("Vals mismatch on dgram: c9 %d c10 %d",
+		     c9, c10);
+		return 1;
+	}
+
+	if (write(sk_st[2], &c5, 1) != 1	||
+	    read(sk_st[1], &c6, 1) != 1		||
+	    write(sk_st[4], &c7, 1) != 1	||
+	    read(sk_st[3], &c8, 1) != 1) {
+		fail("Unable to send/receive a message on stream");
+		return 1;
+	}
+
+	if (c5 != c6 || c7 != c8) {
+		fail("Vals mismatch on stream: c5 %d c6 %d c7 %d c8 %d",
+		     c5, c6, c7, c8);
+		return 1;
+	}
+
+	dir = opendir(subdir_dg);
+	if (dir != NULL || errno != ENOENT) {
+		fail("Directory %s is not deteled", subdir_dg);
+		return 1;
+	}
+
+	dir = opendir(subdir_st);
+	if (dir != NULL || errno != ENOENT) {
+		fail("Directory %s is not deteled", subdir_st);
+		return 1;
+	}
+
+	pass();
+	return 0;
+}

test/zdtm/static/sk-unix01.desc

+{'flavor': 'h ns uns', 'flags': 'suid'}