Re: [LTP] [PATCH v4] syscalls/statx09: Add new test

["xuyang2018.jy@fujitsu.com" <xuyang2018.jy@fujitsu.com>]

Hi Dai

Now, looks good to me
Reviewed-by: Yang Xu <xuyang2018.jy@fujitsu.com>

ps: I won't be online next week because of enjoying the Chinese New Year
holiday

Best Regards
Yang Xu
> This test is basically the same as statx04 but here we check for the
> STATX_ATTR_VERITY flag which is currently only implemented on ext4.
> 
> Signed-off-by: Dai Shili<daisl.fnst@fujitsu.com>
> ---
>   configure.ac                               |   1 +
>   include/lapi/fs.h                          |   4 +
>   include/lapi/fsverity.h                    |  39 +++++++
>   include/lapi/stat.h                        |   4 +
>   m4/ltp-fsverity.m4                         |  10 ++
>   runtest/syscalls                           |   1 +
>   testcases/kernel/syscalls/statx/.gitignore |   1 +
>   testcases/kernel/syscalls/statx/statx09.c  | 160 +++++++++++++++++++++++++++++
>   8 files changed, 220 insertions(+)
>   create mode 100644 include/lapi/fsverity.h
>   create mode 100644 m4/ltp-fsverity.m4
>   create mode 100644 testcases/kernel/syscalls/statx/statx09.c
> 
> diff --git a/configure.ac b/configure.ac
> index 3c56d19..aeb486f 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -367,6 +367,7 @@ LTP_CHECK_SELINUX
>   LTP_CHECK_SYNC_ADD_AND_FETCH
>   LTP_CHECK_SYSCALL_EVENTFD
>   LTP_CHECK_SYSCALL_FCNTL
> +LTP_CHECK_FSVERITY
> 
>   if test "x$with_numa" = xyes; then
>   	LTP_CHECK_SYSCALL_NUMA
> diff --git a/include/lapi/fs.h b/include/lapi/fs.h
> index aafeab4..27b3a18 100644
> --- a/include/lapi/fs.h
> +++ b/include/lapi/fs.h
> @@ -41,6 +41,10 @@
>   #define FS_NODUMP_FL	   0x00000040 /* do not dump file */
>   #endif
> 
> +#ifndef FS_VERITY_FL
> +#define FS_VERITY_FL	   0x00100000 /* Verity protected inode */
> +#endif
> +
>   /*
>    * Helper function to get MAX_LFS_FILESIZE.
>    * Missing PAGE_SHIFT on some libc prevents defining MAX_LFS_FILESIZE.
> diff --git a/include/lapi/fsverity.h b/include/lapi/fsverity.h
> new file mode 100644
> index 0000000..3a33ca8
> --- /dev/null
> +++ b/include/lapi/fsverity.h
> @@ -0,0 +1,39 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2022 FUJITSU LIMITED. All rights reserved.
> + * Author: Dai Shili<daisl.fnst@cn.fujitsu.com>
> + */
> +#ifndef LAPI_FSVERITY_H__
> +#define LAPI_FSVERITY_H__
> +
> +#include "config.h"
> +#include<stdint.h>
> +#include<sys/ioctl.h>
> +
> +#ifdef HAVE_LINUX_FSVERITY_H
> +#include<linux/fsverity.h>
> +#endif
> +
> +#ifndef FS_VERITY_HASH_ALG_SHA256
> +# define FS_VERITY_HASH_ALG_SHA256       1
> +#endif
> +
> +#ifndef HAVE_STRUCT_FSVERITY_ENABLE_ARG
> +struct fsverity_enable_arg {
> +	uint32_t version;
> +	uint32_t hash_algorithm;
> +	uint32_t block_size;
> +	uint32_t salt_size;
> +	uint64_t salt_ptr;
> +	uint32_t sig_size;
> +	uint32_t __reserved1;
> +	uint64_t sig_ptr;
> +	uint64_t __reserved2[11];
> +};
> +#endif
> +
> +#ifndef FS_IOC_ENABLE_VERITY
> +# define FS_IOC_ENABLE_VERITY    _IOW('f', 133, struct fsverity_enable_arg)
> +#endif
> +
> +#endif
> diff --git a/include/lapi/stat.h b/include/lapi/stat.h
> index d596058..ce1f2b6 100644
> --- a/include/lapi/stat.h
> +++ b/include/lapi/stat.h
> @@ -223,6 +223,10 @@ static inline int statx(int dirfd, const char *pathname, unsigned int flags,
>   # define STATX_ATTR_AUTOMOUNT	0x00001000
>   #endif
> 
> +#ifndef STATX_ATTR_VERITY
> +# define STATX_ATTR_VERITY	0x00100000
> +#endif
> +
>   #ifndef AT_SYMLINK_NOFOLLOW
>   # define AT_SYMLINK_NOFOLLOW	0x100
>   #endif
> diff --git a/m4/ltp-fsverity.m4 b/m4/ltp-fsverity.m4
> new file mode 100644
> index 0000000..7104886
> --- /dev/null
> +++ b/m4/ltp-fsverity.m4
> @@ -0,0 +1,10 @@
> +dnl SPDX-License-Identifier: GPL-2.0-or-later
> +dnl Copyright (c) 2022 Fujitsu Ltd.
> +dnl Author: Dai Shili<daisl.fnst@fujitsu.com>
> +
> +AC_DEFUN([LTP_CHECK_FSVERITY],[
> +	AC_CHECK_HEADERS([linux/fsverity.h], [have_fsverity=yes], [AC_MSG_WARN(missing linux/fsverity.h header)])
> +	if test "x$have_fsverity" = "xyes"; then
> +		AC_CHECK_TYPES(struct fsverity_enable_arg,,,[#include<linux/fsverity.h>])
> +	fi
> +])
> diff --git a/runtest/syscalls b/runtest/syscalls
> index 3b2deb6..7ba0331 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -1744,6 +1744,7 @@ statx05 statx05
>   statx06 statx06
>   statx07 statx07
>   statx08 statx08
> +statx09 statx09
> 
>   membarrier01 membarrier01
> 
> diff --git a/testcases/kernel/syscalls/statx/.gitignore b/testcases/kernel/syscalls/statx/.gitignore
> index 4db060d..1cea43c 100644
> --- a/testcases/kernel/syscalls/statx/.gitignore
> +++ b/testcases/kernel/syscalls/statx/.gitignore
> @@ -6,3 +6,4 @@
>   /statx06
>   /statx07
>   /statx08
> +/statx09
> diff --git a/testcases/kernel/syscalls/statx/statx09.c b/testcases/kernel/syscalls/statx/statx09.c
> new file mode 100644
> index 0000000..ba8246b
> --- /dev/null
> +++ b/testcases/kernel/syscalls/statx/statx09.c
> @@ -0,0 +1,160 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2022 FUJITSU LIMITED. All rights reserved.
> + * Author: Dai Shili<daisl.fnst@fujitsu.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * This code tests if the attributes field of statx received expected value.
> + * File set with following flags by using SAFE_IOCTL:
> + *
> + * - STATX_ATTR_VERITY: statx() system call sets STATX_ATTR_VERITY if the file
> + * has fs-verity enabled. This can perform better than FS_IOC_GETFLAGS and
> + * FS_IOC_MEASURE_VERITY because it doesn't require opening the file,
> + * and opening verity files can be expensive.
> + *
> + * Minimum Linux version required is v5.5.
> + */
> +
> +#define _GNU_SOURCE
> +#include<sys/mount.h>
> +#include<stdlib.h>
> +#include "tst_test.h"
> +#include "lapi/fs.h"
> +#include "lapi/fsverity.h"
> +#include "lapi/stat.h"
> +#include<inttypes.h>
> +
> +#define MNTPOINT "mnt_point"
> +#define TESTFILE_FLAGGED MNTPOINT"/test_file1"
> +#define TESTFILE_UNFLAGGED MNTPOINT"/test_file2"
> +
> +static int mount_flag;
> +
> +static const uint32_t hash_algorithms[] = {
> +	FS_VERITY_HASH_ALG_SHA256,
> +};
> +
> +static void test_flagged(void)
> +{
> +	struct statx buf;
> +
> +	TST_EXP_PASS(statx(AT_FDCWD, TESTFILE_FLAGGED, 0, 0,&buf),
> +		"statx(AT_FDCWD, %s, 0, 0,&buf)", TESTFILE_FLAGGED);
> +
> +	if (buf.stx_attributes&  STATX_ATTR_VERITY)
> +		tst_res(TPASS, "STATX_ATTR_VERITY flag is set: (%"PRIu64") ",
> +			(uint64_t)buf.stx_attributes);
> +	else
> +		tst_res(TFAIL, "STATX_ATTR_VERITY flag is not set");
> +}
> +
> +static void test_unflagged(void)
> +{
> +	struct statx buf;
> +
> +	TST_EXP_PASS(statx(AT_FDCWD, TESTFILE_UNFLAGGED, 0, 0,&buf),
> +		"statx(AT_FDCWD, %s, 0, 0,&buf)", TESTFILE_UNFLAGGED);
> +
> +	if ((buf.stx_attributes&  STATX_ATTR_VERITY) == 0)
> +		tst_res(TPASS, "STATX_ATTR_VERITY flag is not set");
> +	else
> +		tst_res(TFAIL, "STATX_ATTR_VERITY flag is set");
> +}
> +
> +static struct test_cases {
> +	void (*tfunc)(void);
> +} tcases[] = {
> +	{&test_flagged},
> +	{&test_unflagged},
> +};
> +
> +static void run(unsigned int i)
> +{
> +	tcases[i].tfunc();
> +}
> +
> +static void flag_setup(void)
> +{
> +	int fd, attr, ret;
> +	struct fsverity_enable_arg enable;
> +
> +	fd = SAFE_OPEN(TESTFILE_FLAGGED, O_RDONLY, 0664);
> +
> +	ret = ioctl(fd, FS_IOC_GETFLAGS,&attr);
> +	if (ret<  0) {
> +		if (errno == ENOTTY)
> +			tst_brk(TCONF | TERRNO, "FS_IOC_GETFLAGS not supported");
> +
> +		tst_brk(TBROK | TERRNO, "ioctl(%i, FS_IOC_GETFLAGS, ...)", fd);
> +	}
> +
> +	memset(&enable, 0, sizeof(enable));
> +	enable.version = 1;
> +	enable.hash_algorithm = hash_algorithms[0];
> +	enable.block_size = 4096;
> +	enable.salt_size = 0;
> +	enable.salt_ptr = (intptr_t)NULL;
> +	enable.sig_size = 0;
> +	enable.sig_ptr = (intptr_t)NULL;
> +
> +	ret = ioctl(fd, FS_IOC_ENABLE_VERITY,&enable);
> +	if (ret<  0) {
> +		if (errno == EOPNOTSUPP) {
> +			tst_brk(TCONF,
> +				"fs-verity is not supported on the file system or by the kernel");
> +		}
> +		tst_brk(TBROK | TERRNO, "ioctl(%i, FS_IOC_ENABLE_VERITY) failed", fd);
> +	}
> +
> +	ret = ioctl(fd, FS_IOC_GETFLAGS,&attr);
> +	if ((ret == 0)&&  !(attr&  FS_VERITY_FL))
> +		tst_res(TFAIL, "%i: fs-verity enabled but FS_VERITY_FL bit not set", fd);
> +
> +	SAFE_CLOSE(fd);
> +}
> +
> +static void setup(void)
> +{
> +	TEST(mount(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL));
> +	if (TST_RET) {
> +		if (TST_ERR == EINVAL)
> +			tst_brk(TCONF, "fs-verity not supported on loopdev");
> +
> +		tst_brk(TBROK | TERRNO, "mount() failed with %ld", TST_RET);
> +	}
> +	mount_flag = 1;
> +
> +	SAFE_FILE_PRINTF(TESTFILE_FLAGGED, "a");
> +	SAFE_FILE_PRINTF(TESTFILE_UNFLAGGED, "a");
> +
> +	flag_setup();
> +}
> +
> +static void cleanup(void)
> +{
> +	if (mount_flag)
> +		tst_umount(MNTPOINT);
> +}
> +
> +static struct tst_test test = {
> +	.test = run,
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.setup = setup,
> +	.cleanup = cleanup,
> +	.needs_root = 1,
> +	.mntpoint = MNTPOINT,
> +	.format_device = 1,
> +	.dev_fs_type = "ext4",
> +	.dev_fs_opts = (const char *const []){"-O verity", NULL},
> +	.needs_kconfigs = (const char *[]) {
> +		"CONFIG_FS_VERITY",
> +		NULL
> +	},
> +	.needs_cmds = (const char *[]) {
> +		"mkfs.ext4>= 1.45.2",
> +		NULL
> +	}
> +};

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