[LTP] [PATCH v1 07/10] Add statmount03 test

Andrea Cervesato
2024-05-15T09:36:20Z

This test verifies that statmount() is correctly reading mount
information (mount id, parent mount id, mount attributes etc.)
using STATMOUNT_MNT_BASIC.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
runtest/syscalls | 1 +
.../kernel/syscalls/statmount/.gitignore | 1 +
.../kernel/syscalls/statmount/statmount03.c | 99 +++++++++++++++++++
3 files changed, 101 insertions(+)
create mode 100644 testcases/kernel/syscalls/statmount/statmount03.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 5f1df42ca..116106521 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1539,6 +1539,7 @@ stat04_64 symlink01 -T stat04_64

statmount01 statmount01
statmount02 statmount02
+statmount03 statmount03

statfs01 statfs01
statfs01_64 statfs01_64
diff --git a/testcases/kernel/syscalls/statmount/.gitignore b/testcases/kernel/syscalls/statmount/.gitignore
index a30b9565f..2a02bf721 100644
--- a/testcases/kernel/syscalls/statmount/.gitignore
+++ b/testcases/kernel/syscalls/statmount/.gitignore
@@ -1,2 +1,3 @@
statmount01
statmount02
+statmount03
diff --git a/testcases/kernel/syscalls/statmount/statmount03.c b/testcases/kernel/syscalls/statmount/statmount03.c
new file mode 100644
index 000000000..6140940bd
--- /dev/null
+++ b/testcases/kernel/syscalls/statmount/statmount03.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/**
+ * [Description]
+ *
+ * This test verifies that statmount() is correctly reading mount information
+ * (mount id, parent mount id, mount attributes etc.) using STATMOUNT_MNT_BASIC.
+ *
+ * [Algorithm]
+ *
+ * * create a mount point
+ * * create a new parent folder inside the mount point and obtain its mount info
+ * * create the new "/" mount folder and obtain its mount info
+ * * run statmount() on the mount point using STATMOUNT_MNT_BASIC
+ * * read results and check if mount info are correct
+ */
+
+#include "statmount.h"
+#include "lapi/stat.h"
+#include "lapi/sched.h"
+
+#define MNTPOINT "mntpoint"
+#define MYPARENT MNTPOINT "/myroot"
+
+static uint64_t root_id;
+static uint64_t root_id_old;
+static uint64_t parent_id;
+static uint64_t parent_id_old;
+static struct statmount *st_mount;
+
+static void run(void)
+{
+ memset(st_mount, 0, sizeof(struct statmount));
+
+ TST_EXP_PASS(statmount(
+ root_id,
+ STATMOUNT_MNT_BASIC,
+ st_mount,
+ sizeof(struct statmount),
+ 0));
+
+ if (TST_RET == -1)
+ return;
+
+ TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_MNT_BASIC);
+ TST_EXP_EQ_LI(st_mount->size, sizeof(struct statmount));
+ TST_EXP_EQ_LI(st_mount->mnt_id, root_id);
+ TST_EXP_EQ_LI(st_mount->mnt_id_old, root_id_old);
+ TST_EXP_EQ_LI(st_mount->mnt_parent_id, parent_id);
+ TST_EXP_EQ_LI(st_mount->mnt_parent_id_old, parent_id_old);
+ TST_EXP_EQ_LI(st_mount->mnt_propagation, MS_PRIVATE);
+}
+
+static void setup(void)
+{
+ struct statx sx;
+
+ SAFE_UNSHARE(CLONE_NEWNS);
+ SAFE_MKDIR(MYPARENT, 0700);
+
+ SAFE_STATX(AT_FDCWD, MYPARENT, 0, STATX_MNT_ID_UNIQUE, &sx);
+ parent_id = sx.stx_mnt_id;
+
+ SAFE_STATX(AT_FDCWD, MYPARENT, 0, STATX_MNT_ID, &sx);
+ parent_id_old = sx.stx_mnt_id;
+
+ SAFE_MOUNT("", "/", NULL, MS_REC | MS_PRIVATE, NULL);
+ SAFE_MOUNT(MYPARENT, MYPARENT, NULL, MS_BIND, NULL);
+ SAFE_CHROOT(MYPARENT);
+ SAFE_CHDIR("/");
+
+ SAFE_STATX(AT_FDCWD, "/", 0, STATX_MNT_ID_UNIQUE, &sx);
+ root_id = sx.stx_mnt_id;
+
+ SAFE_STATX(AT_FDCWD, "/", 0, STATX_MNT_ID, &sx);
+ root_id_old = sx.stx_mnt_id;
+}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .min_kver = "6.8",
+ .needs_tmpdir = 1,
+ .format_device = 1,
+ .mount_device = 1,
+ .mntpoint = MNTPOINT,
+ .all_filesystems = 1,
+ .skip_filesystems = (const char *const []) {
+ "fuse",
+ NULL
+ },
+ .bufs = (struct tst_buffers []) {
+ {&st_mount, .size = sizeof(struct statmount)},
+ {}
+ }