[LTP] [PATCH v4 10/13] Add statmount05 test

[Cyril Hrubis]

Hi!
> This test verifies STATMOUNT_MNT_ROOT and STATMOUNT_MNT_POINT
> functionalities of statmount().
> 
> Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
> ---
>  runtest/syscalls                                  |   1 +
>  testcases/kernel/syscalls/statmount/.gitignore    |   1 +
>  testcases/kernel/syscalls/statmount/statmount05.c | 128 ++++++++++++++++++++++
>  3 files changed, 130 insertions(+)
> 
> diff --git a/runtest/syscalls b/runtest/syscalls
> index e43e53002..9f5a473f3 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -1572,6 +1572,7 @@ statmount01 statmount01
>  statmount02 statmount02
>  statmount03 statmount03
>  statmount04 statmount04
> +statmount05 statmount05
>  
>  statfs01 statfs01
>  statfs01_64 statfs01_64
> diff --git a/testcases/kernel/syscalls/statmount/.gitignore b/testcases/kernel/syscalls/statmount/.gitignore
> index e720050b5..f64763242 100644
> --- a/testcases/kernel/syscalls/statmount/.gitignore
> +++ b/testcases/kernel/syscalls/statmount/.gitignore
> @@ -2,3 +2,4 @@ statmount01
>  statmount02
>  statmount03
>  statmount04
> +statmount05
> diff --git a/testcases/kernel/syscalls/statmount/statmount05.c b/testcases/kernel/syscalls/statmount/statmount05.c
> new file mode 100644
> index 000000000..dd4bb17f0
> --- /dev/null
> +++ b/testcases/kernel/syscalls/statmount/statmount05.c
> @@ -0,0 +1,128 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * This test verifies STATMOUNT_MNT_ROOT and STATMOUNT_MNT_POINT functionalities
> + * of statmount(). In particular, STATMOUNT_MNT_ROOT will give the mount root
> + * (i.e. mount --bind /mnt /bla -> /mnt) and STATMOUNT_MNT_POINT will
> + * give the mount point (i.e. mount --bind /mnt /bla -> /bla).
> + *
> + * [Algorithm]
> + *
> + * - create a mount point
> + * - mount a folder inside the mount point
> + * - run statmount() on the mounted folder using STATMOUNT_MNT_ROOT
> + * - read results and check if contain the mount root path
> + * - run statmount() on the mounted folder using STATMOUNT_MNT_POINT
> + * - read results and check if contain the mount point path
> + */
> +
> +#define _GNU_SOURCE
> +
> +#include "statmount.h"
> +#include "lapi/stat.h"
> +#include "lapi/sched.h"
> +#include "tst_tmpdir.h"
> +
> +#define MNTPOINT "mntpoint"
> +#define DIRA MNTPOINT "/LTP_DIR_A"
> +#define DIRB MNTPOINT "/LTP_DIR_B"
> +#define SM_SIZE (1 << 10)
> +
> +static uint64_t root_id;
> +static struct statmount *st_mount;
> +static char *mnt_root;
> +static char *mnt_point;
> +
> +static void test_mount_root(void)
> +{
> +	tst_res(TINFO, "Testing STATMOUNT_MNT_ROOT");
> +
> +	char *last_root;
> +
> +	memset(st_mount, 0, SM_SIZE);
> +
> +	TST_EXP_PASS(statmount(root_id, STATMOUNT_MNT_ROOT, st_mount,
> +		SM_SIZE, 0));
> +
> +	if (TST_RET == -1)
> +		return;

if (!TST_PASSED)

> +	last_root = strrchr(mnt_root, '/');
> +
> +	TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_MNT_ROOT);
> +	TST_EXP_EXPR(strcmp(st_mount->str + st_mount->mnt_root, last_root) == 0,
> +		"statmount() read '%s', expected '%s'",
> +		st_mount->str + st_mount->mnt_root,
> +		last_root);

You have added TST_EXP_EQ_STR() in an subsequent patch, you should use
it here as well.

> +}
> +
> +static void test_mount_point(void)
> +{
> +	tst_res(TINFO, "Testing STATMOUNT_MNT_POINT");
> +
> +	memset(st_mount, 0, SM_SIZE);
> +
> +	TST_EXP_POSITIVE(statmount(root_id, STATMOUNT_MNT_POINT, st_mount,
> +		SM_SIZE, 0));
> +
> +	if (TST_RET == -1)
> +		return;

Here as well.

> +	TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_MNT_POINT);
> +	TST_EXP_EXPR(strcmp(st_mount->str + st_mount->mnt_point, mnt_point) == 0,
> +		"mount point is '%s'",
> +		st_mount->str + st_mount->mnt_point);

And here as well.

> +}
> +
> +static void run(void)
> +{
> +	test_mount_root();
> +	test_mount_point();
> +}
> +
> +static void setup(void)
> +{
> +	struct ltp_statx sx;
> +
> +	mnt_root = tst_tmpdir_mkpath(DIRA);
> +	mnt_point = tst_tmpdir_mkpath(DIRB);

This was renamed to tst_tmpdir_genpath()

> +	SAFE_MKDIR(mnt_root, 0700);
> +	SAFE_MKDIR(mnt_point, 0700);
> +	SAFE_MOUNT(mnt_root, mnt_point, "none", MS_BIND, NULL);
> +
> +	SAFE_STATX(AT_FDCWD, mnt_point, 0, STATX_MNT_ID_UNIQUE, &sx);
> +	root_id = sx.data.stx_mnt_id;
> +}
> +
> +static void cleanup(void)
> +{
> +	if (tst_is_mounted(DIRB))
> +		SAFE_UMOUNT(DIRB);
> +
> +	if (tst_is_mounted(DIRA))
> +		SAFE_UMOUNT(DIRA);
> +}
> +
> +static struct tst_test test = {
> +	.test_all = run,
> +	.setup = setup,
> +	.cleanup = cleanup,
> +	.min_kver = "6.8",
> +	.mount_device = 1,
> +	.mntpoint = MNTPOINT,
> +	.all_filesystems = 1,
> +	.skip_filesystems = (const char *const []) {
> +		"fuse",
> +		NULL
> +	},
> +	.bufs = (struct tst_buffers []) {
> +		{&st_mount, .size = SM_SIZE},
> +		{}
> +	}
> +};

-- 
Cyril Hrubis
chrubis@suse.cz