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-rw-r--r--tools/testing/selftests/filesystems/nsfs/.gitignore (renamed from tools/testing/selftests/nsfs/.gitignore)1
-rw-r--r--tools/testing/selftests/filesystems/nsfs/Makefile (renamed from tools/testing/selftests/nsfs/Makefile)4
-rw-r--r--tools/testing/selftests/filesystems/nsfs/config (renamed from tools/testing/selftests/nsfs/config)0
-rw-r--r--tools/testing/selftests/filesystems/nsfs/iterate_mntns.c149
-rw-r--r--tools/testing/selftests/filesystems/nsfs/owner.c (renamed from tools/testing/selftests/nsfs/owner.c)0
-rw-r--r--tools/testing/selftests/filesystems/nsfs/pidns.c (renamed from tools/testing/selftests/nsfs/pidns.c)0
-rw-r--r--tools/testing/selftests/filesystems/statmount/Makefile2
-rw-r--r--tools/testing/selftests/filesystems/statmount/listmount_test.c66
-rw-r--r--tools/testing/selftests/pidfd/pidfd.h1
9 files changed, 219 insertions, 4 deletions
diff --git a/tools/testing/selftests/nsfs/.gitignore b/tools/testing/selftests/filesystems/nsfs/.gitignore
index ed79ebdf286e4..92a8249006d1e 100644
--- a/tools/testing/selftests/nsfs/.gitignore
+++ b/tools/testing/selftests/filesystems/nsfs/.gitignore
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
owner
pidns
+iterate_mntns
diff --git a/tools/testing/selftests/nsfs/Makefile b/tools/testing/selftests/filesystems/nsfs/Makefile
index dd9bd50b7b936..231aaa7dfd95c 100644
--- a/tools/testing/selftests/nsfs/Makefile
+++ b/tools/testing/selftests/filesystems/nsfs/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
-TEST_GEN_PROGS := owner pidns
+TEST_GEN_PROGS := owner pidns iterate_mntns
CFLAGS := -Wall -Werror
-include ../lib.mk
+include ../../lib.mk
diff --git a/tools/testing/selftests/nsfs/config b/tools/testing/selftests/filesystems/nsfs/config
index 598d0a225fc95..598d0a225fc95 100644
--- a/tools/testing/selftests/nsfs/config
+++ b/tools/testing/selftests/filesystems/nsfs/config
diff --git a/tools/testing/selftests/filesystems/nsfs/iterate_mntns.c b/tools/testing/selftests/filesystems/nsfs/iterate_mntns.c
new file mode 100644
index 0000000000000..457cf76f3c5f3
--- /dev/null
+++ b/tools/testing/selftests/filesystems/nsfs/iterate_mntns.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Christian Brauner <brauner@kernel.org>
+
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <unistd.h>
+
+#include "../../kselftest_harness.h"
+
+#define MNT_NS_COUNT 11
+#define MNT_NS_LAST_INDEX 10
+
+struct mnt_ns_info {
+ __u32 size;
+ __u32 nr_mounts;
+ __u64 mnt_ns_id;
+};
+
+#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
+
+/* Get information about namespace. */
+#define NS_MNT_GET_INFO _IOR(0xb7, 10, struct mnt_ns_info)
+/* Get next namespace. */
+#define NS_MNT_GET_NEXT _IOR(0xb7, 11, struct mnt_ns_info)
+/* Get previous namespace. */
+#define NS_MNT_GET_PREV _IOR(0xb7, 12, struct mnt_ns_info)
+
+FIXTURE(iterate_mount_namespaces) {
+ int fd_mnt_ns[MNT_NS_COUNT];
+ __u64 mnt_ns_id[MNT_NS_COUNT];
+};
+
+FIXTURE_SETUP(iterate_mount_namespaces)
+{
+ for (int i = 0; i < MNT_NS_COUNT; i++)
+ self->fd_mnt_ns[i] = -EBADF;
+
+ /*
+ * Creating a new user namespace let's us guarantee that we only see
+ * mount namespaces that we did actually create.
+ */
+ ASSERT_EQ(unshare(CLONE_NEWUSER), 0);
+
+ for (int i = 0; i < MNT_NS_COUNT; i++) {
+ struct mnt_ns_info info = {};
+
+ ASSERT_EQ(unshare(CLONE_NEWNS), 0);
+ self->fd_mnt_ns[i] = open("/proc/self/ns/mnt", O_RDONLY | O_CLOEXEC);
+ ASSERT_GE(self->fd_mnt_ns[i], 0);
+ ASSERT_EQ(ioctl(self->fd_mnt_ns[i], NS_MNT_GET_INFO, &info), 0);
+ self->mnt_ns_id[i] = info.mnt_ns_id;
+ }
+}
+
+FIXTURE_TEARDOWN(iterate_mount_namespaces)
+{
+ for (int i = 0; i < MNT_NS_COUNT; i++) {
+ if (self->fd_mnt_ns[i] < 0)
+ continue;
+ ASSERT_EQ(close(self->fd_mnt_ns[i]), 0);
+ }
+}
+
+TEST_F(iterate_mount_namespaces, iterate_all_forward)
+{
+ int fd_mnt_ns_cur, count = 0;
+
+ fd_mnt_ns_cur = fcntl(self->fd_mnt_ns[0], F_DUPFD_CLOEXEC);
+ ASSERT_GE(fd_mnt_ns_cur, 0);
+
+ for (;; count++) {
+ struct mnt_ns_info info = {};
+ int fd_mnt_ns_next;
+
+ fd_mnt_ns_next = ioctl(fd_mnt_ns_cur, NS_MNT_GET_NEXT, &info);
+ if (fd_mnt_ns_next < 0 && errno == ENOENT)
+ break;
+ ASSERT_GE(fd_mnt_ns_next, 0);
+ ASSERT_EQ(close(fd_mnt_ns_cur), 0);
+ fd_mnt_ns_cur = fd_mnt_ns_next;
+ }
+ ASSERT_EQ(count, MNT_NS_LAST_INDEX);
+}
+
+TEST_F(iterate_mount_namespaces, iterate_all_backwards)
+{
+ int fd_mnt_ns_cur, count = 0;
+
+ fd_mnt_ns_cur = fcntl(self->fd_mnt_ns[MNT_NS_LAST_INDEX], F_DUPFD_CLOEXEC);
+ ASSERT_GE(fd_mnt_ns_cur, 0);
+
+ for (;; count++) {
+ struct mnt_ns_info info = {};
+ int fd_mnt_ns_prev;
+
+ fd_mnt_ns_prev = ioctl(fd_mnt_ns_cur, NS_MNT_GET_PREV, &info);
+ if (fd_mnt_ns_prev < 0 && errno == ENOENT)
+ break;
+ ASSERT_GE(fd_mnt_ns_prev, 0);
+ ASSERT_EQ(close(fd_mnt_ns_cur), 0);
+ fd_mnt_ns_cur = fd_mnt_ns_prev;
+ }
+ ASSERT_EQ(count, MNT_NS_LAST_INDEX);
+}
+
+TEST_F(iterate_mount_namespaces, iterate_forward)
+{
+ int fd_mnt_ns_cur;
+
+ ASSERT_EQ(setns(self->fd_mnt_ns[0], CLONE_NEWNS), 0);
+
+ fd_mnt_ns_cur = self->fd_mnt_ns[0];
+ for (int i = 1; i < MNT_NS_COUNT; i++) {
+ struct mnt_ns_info info = {};
+ int fd_mnt_ns_next;
+
+ fd_mnt_ns_next = ioctl(fd_mnt_ns_cur, NS_MNT_GET_NEXT, &info);
+ ASSERT_GE(fd_mnt_ns_next, 0);
+ ASSERT_EQ(close(fd_mnt_ns_cur), 0);
+ fd_mnt_ns_cur = fd_mnt_ns_next;
+ ASSERT_EQ(info.mnt_ns_id, self->mnt_ns_id[i]);
+ }
+}
+
+TEST_F(iterate_mount_namespaces, iterate_backward)
+{
+ int fd_mnt_ns_cur;
+
+ ASSERT_EQ(setns(self->fd_mnt_ns[MNT_NS_LAST_INDEX], CLONE_NEWNS), 0);
+
+ fd_mnt_ns_cur = self->fd_mnt_ns[MNT_NS_LAST_INDEX];
+ for (int i = MNT_NS_LAST_INDEX - 1; i >= 0; i--) {
+ struct mnt_ns_info info = {};
+ int fd_mnt_ns_prev;
+
+ fd_mnt_ns_prev = ioctl(fd_mnt_ns_cur, NS_MNT_GET_PREV, &info);
+ ASSERT_GE(fd_mnt_ns_prev, 0);
+ ASSERT_EQ(close(fd_mnt_ns_cur), 0);
+ fd_mnt_ns_cur = fd_mnt_ns_prev;
+ ASSERT_EQ(info.mnt_ns_id, self->mnt_ns_id[i]);
+ }
+}
+
+TEST_HARNESS_MAIN
diff --git a/tools/testing/selftests/nsfs/owner.c b/tools/testing/selftests/filesystems/nsfs/owner.c
index 96a976c745504..96a976c745504 100644
--- a/tools/testing/selftests/nsfs/owner.c
+++ b/tools/testing/selftests/filesystems/nsfs/owner.c
diff --git a/tools/testing/selftests/nsfs/pidns.c b/tools/testing/selftests/filesystems/nsfs/pidns.c
index e3c772c6a7c7c..e3c772c6a7c7c 100644
--- a/tools/testing/selftests/nsfs/pidns.c
+++ b/tools/testing/selftests/filesystems/nsfs/pidns.c
diff --git a/tools/testing/selftests/filesystems/statmount/Makefile b/tools/testing/selftests/filesystems/statmount/Makefile
index 3af3136e35a4b..14ee91a416509 100644
--- a/tools/testing/selftests/filesystems/statmount/Makefile
+++ b/tools/testing/selftests/filesystems/statmount/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-or-later
CFLAGS += -Wall -O2 -g $(KHDR_INCLUDES)
-TEST_GEN_PROGS := statmount_test statmount_test_ns
+TEST_GEN_PROGS := statmount_test statmount_test_ns listmount_test
include ../../lib.mk
diff --git a/tools/testing/selftests/filesystems/statmount/listmount_test.c b/tools/testing/selftests/filesystems/statmount/listmount_test.c
new file mode 100644
index 0000000000000..15f0834f7557c
--- /dev/null
+++ b/tools/testing/selftests/filesystems/statmount/listmount_test.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Christian Brauner <brauner@kernel.org>
+
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <unistd.h>
+
+#include "statmount.h"
+#include "../../kselftest_harness.h"
+
+#ifndef LISTMOUNT_REVERSE
+#define LISTMOUNT_REVERSE (1 << 0) /* List later mounts first */
+#endif
+
+#define LISTMNT_BUFFER 10
+
+/* Check that all mount ids are in increasing order. */
+TEST(listmount_forward)
+{
+ uint64_t list[LISTMNT_BUFFER], last_mnt_id = 0;
+
+ for (;;) {
+ ssize_t nr_mounts;
+
+ nr_mounts = listmount(LSMT_ROOT, 0, last_mnt_id,
+ list, LISTMNT_BUFFER, 0);
+ ASSERT_GE(nr_mounts, 0);
+ if (nr_mounts == 0)
+ break;
+
+ for (size_t cur = 0; cur < nr_mounts; cur++) {
+ if (cur < nr_mounts - 1)
+ ASSERT_LT(list[cur], list[cur + 1]);
+ last_mnt_id = list[cur];
+ }
+ }
+}
+
+/* Check that all mount ids are in decreasing order. */
+TEST(listmount_backward)
+{
+ uint64_t list[LISTMNT_BUFFER], last_mnt_id = 0;
+
+ for (;;) {
+ ssize_t nr_mounts;
+
+ nr_mounts = listmount(LSMT_ROOT, 0, last_mnt_id,
+ list, LISTMNT_BUFFER, LISTMOUNT_REVERSE);
+ ASSERT_GE(nr_mounts, 0);
+ if (nr_mounts == 0)
+ break;
+
+ for (size_t cur = 0; cur < nr_mounts; cur++) {
+ if (cur < nr_mounts - 1)
+ ASSERT_GT(list[cur], list[cur + 1]);
+ last_mnt_id = list[cur];
+ }
+ }
+}
+
+TEST_HARNESS_MAIN
diff --git a/tools/testing/selftests/pidfd/pidfd.h b/tools/testing/selftests/pidfd/pidfd.h
index 28a471c88c51b..0b96ac4b8ce5f 100644
--- a/tools/testing/selftests/pidfd/pidfd.h
+++ b/tools/testing/selftests/pidfd/pidfd.h
@@ -12,7 +12,6 @@
#include <stdlib.h>
#include <string.h>
#include <syscall.h>
-#include <sys/mount.h>
#include <sys/types.h>
#include <sys/wait.h>
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-29 19:58:05 +0000