Re: [LTP] [PATCH 1/5] Add stat04 test

Li Wang
2024-07-04T07:07:10Z

On Tue, Jul 2, 2024 at 10:15 PM Andrea Cervesato <andrea.cervesato@suse.de>
wrote:

> From: Andrea Cervesato <andrea.cervesato@suse.com>
>
> This test has been extracted from symlink01 test and it checks that
> stat() executed on file provide the same information of symlink linking
> to it.
>
> Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
> ---
> runtest/smoketest | 4 +-
> runtest/syscalls | 4 +-
> testcases/kernel/syscalls/stat/.gitignore | 2 +
> testcases/kernel/syscalls/stat/stat04.c | 121
> ++++++++++++++++++++++++++++++
> 4 files changed, 127 insertions(+), 4 deletions(-)
>
> diff --git a/runtest/smoketest b/runtest/smoketest
> index f6f14fd2b..5608417f9 100644
> --- a/runtest/smoketest
> +++ b/runtest/smoketest
> @@ -8,8 +8,8 @@ time01 time01
> wait02 wait02
> write01 write01
> symlink01 symlink01
> -stat04 symlink01 -T stat04
> -utime07 utime07
> +stat04 stat04
> +utime01A symlink01 -T utime01
> rename01A symlink01 -T rename01
> splice02 splice02 -s 20
> df01_sh df01.sh
> diff --git a/runtest/syscalls b/runtest/syscalls
> index 44a577db3..3e7a5ca1b 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -1535,8 +1535,8 @@ stat02 stat02
> stat02_64 stat02_64
> stat03 stat03
> stat03_64 stat03_64
> -stat04 symlink01 -T stat04
> -stat04_64 symlink01 -T stat04_64
> +stat04 stat04
> +stat04_64 stat04_64
>
> statfs01 statfs01
> statfs01_64 statfs01_64
> diff --git a/testcases/kernel/syscalls/stat/.gitignore
> b/testcases/kernel/syscalls/stat/.gitignore
> index fa0a4ce9f..0a62dc6ee 100644
> --- a/testcases/kernel/syscalls/stat/.gitignore
> +++ b/testcases/kernel/syscalls/stat/.gitignore
> @@ -4,3 +4,5 @@
> /stat02_64
> /stat03
> /stat03_64
> +/stat04
> +/stat04_64
> diff --git a/testcases/kernel/syscalls/stat/stat04.c
> b/testcases/kernel/syscalls/stat/stat04.c
> new file mode 100644
> index 000000000..ee635dbd9
> --- /dev/null
> +++ b/testcases/kernel/syscalls/stat/stat04.c
> @@ -0,0 +1,121 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
> + * Author: David Fenner, Jon Hendrickson
> + * Copyright (C) 2024 Andrea Cervesato <andrea.cervesato@suse.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * This test checks that stat() executed on file provide the same
> information
> + * of symlink linking to it.
> + */
> +
> +#include <stdlib.h>
> +#include "tst_test.h"
> +
> +#define FILENAME "file.txt"
> +#define MNTPOINT "mntpoint"
> +#define SYMBNAME MNTPOINT"/file_symlink"
> +
> +static struct stat *file_stat;
> +static struct stat *symb_stat;
> +static char *tmpdir;
> +
> +static void run(void)
> +{
> + TST_EXP_EQ_LI(file_stat->st_dev, symb_stat->st_dev);
> + TST_EXP_EQ_LI(file_stat->st_mode, symb_stat->st_mode);
> + TST_EXP_EQ_LI(file_stat->st_nlink, symb_stat->st_nlink);
> + TST_EXP_EQ_LI(file_stat->st_uid, symb_stat->st_uid);
> + TST_EXP_EQ_LI(file_stat->st_gid, symb_stat->st_gid);
> + TST_EXP_EQ_LI(file_stat->st_size, symb_stat->st_size);
> + TST_EXP_EQ_LI(file_stat->st_atime, symb_stat->st_atime);
> + TST_EXP_EQ_LI(file_stat->st_mtime, symb_stat->st_mtime);
> + TST_EXP_EQ_LI(file_stat->st_ctime, symb_stat->st_ctime);
> +}
> +
> +static void setup(void)
> +{
> + char opt_bsize[32];
> + char symb_path[PATH_MAX];
> + char file_path[PATH_MAX];
> + const char *const fs_opts[] = {opt_bsize, NULL};
> + struct stat sb;
> + int pagesize;
> + int fd;
> +
> + tmpdir = tst_get_tmpdir();
> +
> + if (strlen(tmpdir) >= (PATH_MAX - strlen(FILENAME))) {
> + tst_brk(TCONF, "Temporary folder name is too long. "
> + "Can't create file");
> + }
> +
> + if (strlen(tmpdir) >= (PATH_MAX - strlen(SYMBNAME))) {
> + tst_brk(TCONF, "Temporary folder name is too long. "
> + "Can't create symbolic link");
> + }
> +
> + /* change st_blksize / st_dev */
> + SAFE_STAT(".", &sb);
> + pagesize = sb.st_blksize == 4096 ? 1024 : 4096;
> +
> + snprintf(opt_bsize, sizeof(opt_bsize), "-b %i", pagesize);
> + SAFE_MKFS(tst_device->dev, tst_device->fs_type, fs_opts, NULL);
> + SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, 0);
> +
> + SAFE_TOUCH(FILENAME, 0777, NULL);
> +
> + /* change st_nlink */
> + SAFE_LINK(FILENAME, "linked_file");
> +
> + /* change st_uid and st_gid */
> + SAFE_CHOWN(FILENAME, 1000, 1000);
> +
> + /* change st_size */
> + fd = SAFE_OPEN(FILENAME, O_WRONLY, 0777);
> + tst_fill_fd(fd, 'a', TST_KB, 500);
> + SAFE_CLOSE(fd);
> +
> + /* change st_atime / st_mtime / st_ctime */
> + sleep(1);
>

Does this 1sec sleep make real sense to the test? Can we remove it?

> +
> + memset(file_path, 0, PATH_MAX);
> + snprintf(file_path, PATH_MAX, "%s/%s", tmpdir, FILENAME);
> +
> + memset(symb_path, 0, PATH_MAX);
> + snprintf(symb_path, PATH_MAX, "%s/%s", tmpdir, SYMBNAME);
> +
> + SAFE_SYMLINK(file_path, symb_path);
> +
> + SAFE_STAT(file_path, file_stat);
> + SAFE_STAT(symb_path, symb_stat);
> +}
> +
> +static void cleanup(void)
> +{
> + free(tmpdir);
> +
> + SAFE_UNLINK(SYMBNAME);
> +
> + if (tst_is_mounted(MNTPOINT))
> + SAFE_UMOUNT(MNTPOINT);
> +}
> +
> +static struct tst_test test = {
> + .setup = setup,
> + .cleanup = cleanup,
> + .test_all = run,
> + .needs_root = 1,
> + .needs_tmpdir = 1,
> + .needs_device = 1,
> + .mntpoint = MNTPOINT,
> + .dev_fs_type = "ext2",
> + .bufs = (struct tst_buffers []) {
> + {&file_stat, .size = sizeof(struct stat)},
> + {&symb_stat, .size = sizeof(struct stat)},
> + {}
> + }
> +};
>
> --
> 2.43.0
>
>
> --
> Mailing list info: https://lists.linux.it/listinfo/ltp
>
>

--
Regards,
Li Wang