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selftests/landlock: Make tests build with old libc

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Replace SYS_<syscall> with __NR_<syscall>.  Using the __NR_<syscall>
notation, provided by UAPI, is useful to build tests on systems without
the SYS_<syscall> definitions.

Replace SYS_pivot_root with __NR_pivot_root, and SYS_move_mount with
__NR_move_mount.

Define renameat2() and RENAME_EXCHANGE if they are unknown to old build
systems.

Cc: Shuah Khan <shuah@kernel.org>
Link: https://lore.kernel.org/r/20220506160820.524344-3-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün 2022-05-06 18:08:12 +02:00
parent a13e248ff9
commit 87129ef136
No known key found for this signature in database
GPG Key ID: E5E3D0E88C82F6D2
1 changed files with 18 additions and 5 deletions
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23
tools/testing/selftests/landlock/fs_test.c
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@ -22,6 +22,19 @@
#include "common.h" #include "common.h"
#ifndef renameat2
int renameat2(int olddirfd, const char *oldpath, int newdirfd,
const char *newpath, unsigned int flags)
{
return syscall(__NR_renameat2, olddirfd, oldpath, newdirfd, newpath,
flags);
}
#endif
#ifndef RENAME_EXCHANGE
#define RENAME_EXCHANGE (1 << 1)
#endif
#define TMP_DIR "tmp" #define TMP_DIR "tmp"
#define BINARY_PATH "./true" #define BINARY_PATH "./true"
@ -1279,7 +1292,7 @@ TEST_F_FORK(layout1, rule_inside_mount_ns)
int ruleset_fd; int ruleset_fd;
set_cap(_metadata, CAP_SYS_ADMIN); set_cap(_metadata, CAP_SYS_ADMIN);
ASSERT_EQ(0, syscall(SYS_pivot_root, dir_s3d2, dir_s3d3)) ASSERT_EQ(0, syscall(__NR_pivot_root, dir_s3d2, dir_s3d3))
{ {
TH_LOG("Failed to pivot root: %s", strerror(errno)); TH_LOG("Failed to pivot root: %s", strerror(errno));
}; };
@ -1313,7 +1326,7 @@ TEST_F_FORK(layout1, mount_and_pivot)
set_cap(_metadata, CAP_SYS_ADMIN); set_cap(_metadata, CAP_SYS_ADMIN);
ASSERT_EQ(-1, mount(NULL, dir_s3d2, NULL, MS_RDONLY, NULL)); ASSERT_EQ(-1, mount(NULL, dir_s3d2, NULL, MS_RDONLY, NULL));
ASSERT_EQ(EPERM, errno); ASSERT_EQ(EPERM, errno);
ASSERT_EQ(-1, syscall(SYS_pivot_root, dir_s3d2, dir_s3d3)); ASSERT_EQ(-1, syscall(__NR_pivot_root, dir_s3d2, dir_s3d3));
ASSERT_EQ(EPERM, errno); ASSERT_EQ(EPERM, errno);
clear_cap(_metadata, CAP_SYS_ADMIN); clear_cap(_metadata, CAP_SYS_ADMIN);
} }
@ -1332,13 +1345,13 @@ TEST_F_FORK(layout1, move_mount)
ASSERT_LE(0, ruleset_fd); ASSERT_LE(0, ruleset_fd);
set_cap(_metadata, CAP_SYS_ADMIN); set_cap(_metadata, CAP_SYS_ADMIN);
ASSERT_EQ(0, syscall(SYS_move_mount, AT_FDCWD, dir_s3d2, AT_FDCWD, ASSERT_EQ(0, syscall(__NR_move_mount, AT_FDCWD, dir_s3d2, AT_FDCWD,
dir_s1d2, 0)) dir_s1d2, 0))
{ {
TH_LOG("Failed to move mount: %s", strerror(errno)); TH_LOG("Failed to move mount: %s", strerror(errno));
} }
ASSERT_EQ(0, syscall(SYS_move_mount, AT_FDCWD, dir_s1d2, AT_FDCWD, ASSERT_EQ(0, syscall(__NR_move_mount, AT_FDCWD, dir_s1d2, AT_FDCWD,
dir_s3d2, 0)); dir_s3d2, 0));
clear_cap(_metadata, CAP_SYS_ADMIN); clear_cap(_metadata, CAP_SYS_ADMIN);
@ -1346,7 +1359,7 @@ TEST_F_FORK(layout1, move_mount)
ASSERT_EQ(0, close(ruleset_fd)); ASSERT_EQ(0, close(ruleset_fd));
set_cap(_metadata, CAP_SYS_ADMIN); set_cap(_metadata, CAP_SYS_ADMIN);
ASSERT_EQ(-1, syscall(SYS_move_mount, AT_FDCWD, dir_s3d2, AT_FDCWD, ASSERT_EQ(-1, syscall(__NR_move_mount, AT_FDCWD, dir_s3d2, AT_FDCWD,
dir_s1d2, 0)); dir_s1d2, 0));
ASSERT_EQ(EPERM, errno); ASSERT_EQ(EPERM, errno);
clear_cap(_metadata, CAP_SYS_ADMIN); clear_cap(_metadata, CAP_SYS_ADMIN);