[LTP] [PATCH v2] syscalls/statx09: Add new test
Dai Shili
daisl.fnst@fujitsu.com
Wed Jan 26 04:00:57 CET 2022
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 | 38 +++++++
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 | 172 +++++++++++++++++++++++++++++
8 files changed, 231 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..0125fa8
--- /dev/null
+++ b/include/lapi/fsverity.h
@@ -0,0 +1,38 @@
+// 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 <linux/types.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 {
+ __u32 version;
+ __u32 hash_algorithm;
+ __u32 block_size;
+ __u32 salt_size;
+ __u64 salt_ptr;
+ __u32 sig_size;
+ __u32 __reserved1;
+ __u64 sig_ptr;
+ __u64 __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..76716bf
--- /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@cfujitsu.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..8fc3703
--- /dev/null
+++ b/testcases/kernel/syscalls/statx/statx09.c
@@ -0,0 +1,172 @@
+// 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.
+ * fs-verity is currently supported by the ext4 and f2fs filesystems.
+ * The CONFIG_FS_VERITY kconfig option must be enabled to use fs-verity
+ * on either filesystem.
+ * ext4 supports fs-verity since Linux v5.4 and e2fsprogs v1.45.2.
+ */
+
+#define _GNU_SOURCE
+#include <sys/mount.h>
+#include <stdlib.h>
+#include <linux/ioctl.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_file3"
+#define TESTFILE_UNFLAGGED MNTPOINT"/test_file4"
+
+static int fd_flagged, fd_unflagged;
+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") ", 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 attr, ret;
+ struct fsverity_enable_arg enable;
+
+ fd_flagged = SAFE_OPEN(TESTFILE_FLAGGED, O_RDONLY, 0664);
+
+ ret = ioctl(fd_flagged, 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_flagged);
+ }
+
+ 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_flagged, 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_flagged);
+ }
+
+ ret = ioctl(fd_flagged, 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_flagged);
+
+ SAFE_CLOSE(fd_flagged);
+}
+
+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;
+
+ fd_unflagged = SAFE_OPEN(TESTFILE_UNFLAGGED, O_RDWR | O_CREAT, 0664);
+ fd_flagged = SAFE_OPEN(TESTFILE_FLAGGED, O_RDWR | O_CREAT, 0664);
+ SAFE_FILE_PRINTF(TESTFILE_FLAGGED, "a");
+ SAFE_CLOSE(fd_flagged);
+
+ flag_setup();
+}
+
+static void cleanup(void)
+{
+ if (fd_flagged > 0)
+ SAFE_CLOSE(fd_flagged);
+ if (fd_unflagged > 0)
+ SAFE_CLOSE(fd_unflagged);
+
+ 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
+ }
+};
--
1.8.3.1
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