mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
a6917c82b3
Now that compat_symbol_reference works in non-internal tests. Also do not build and run the test at all on architectures which do not have the pre-2.28 symbol version of fcntl. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* Check non representable OFD locks regions in non-LFS mode for compat
|
|
mode (BZ #20251)
|
|
Copyright (C) 2018-2021 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
|
|
#include <support/temp_file.h>
|
|
#include <support/check.h>
|
|
|
|
#include <shlib-compat.h>
|
|
compat_symbol_reference (libc, fcntl, fcntl, GLIBC_2_0);
|
|
|
|
static char *temp_filename;
|
|
static int temp_fd;
|
|
|
|
static void
|
|
do_prepare (int argc, char **argv)
|
|
{
|
|
temp_fd = create_temp_file ("tst-ofdlocks-compat.", &temp_filename);
|
|
TEST_VERIFY_EXIT (temp_fd != -1);
|
|
}
|
|
|
|
#define PREPARE do_prepare
|
|
|
|
/* Linux between 4.13 and 4.15 return EOVERFLOW for LFS OFD locks usage
|
|
in compat mode (non-LFS ABI running on a LFS default kernel, such as
|
|
i386 on a x86_64 kernel or s390-32 on a s390-64 kernel) [1]. This is
|
|
a kernel issue because __NR_fcntl64 is the expected way to use OFD locks
|
|
(used on GLIBC for both fcntl and fcntl64).
|
|
|
|
[1] https://sourceware.org/ml/libc-alpha/2018-07/msg00243.html */
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
/* The compat fcntl version for architectures which support non-LFS
|
|
operations does not wrap the flock OFD argument, so the struct is passed
|
|
unmodified to kernel. It means no EOVERFLOW is returned, so operations
|
|
with LFS should not incur in failure. */
|
|
|
|
struct flock64 lck64 = {
|
|
.l_type = F_WRLCK,
|
|
.l_whence = SEEK_SET,
|
|
.l_start = (off64_t)INT32_MAX + 1024,
|
|
.l_len = 1024,
|
|
};
|
|
int ret = fcntl (temp_fd, F_OFD_SETLKW, &lck64);
|
|
if (ret == -1 && errno == EINVAL)
|
|
/* OFD locks are only available on Linux 3.15. */
|
|
FAIL_UNSUPPORTED ("fcntl (F_OFD_SETLKW) not supported");
|
|
|
|
TEST_VERIFY_EXIT (ret == 0);
|
|
|
|
/* Open file description locks placed through the same open file description
|
|
(either by same file descriptor or a duplicated one created by fork,
|
|
dup, fcntl F_DUPFD, etc.) overwrites then old lock. To force a
|
|
conflicting lock combination, it creates a new file descriptor. */
|
|
int fd = open64 (temp_filename, O_RDWR, 0666);
|
|
TEST_VERIFY_EXIT (fd != -1);
|
|
|
|
struct flock64 lck = {
|
|
.l_type = F_WRLCK,
|
|
.l_whence = SEEK_SET,
|
|
.l_start = INT32_MAX - 1024,
|
|
.l_len = 4 * 1024,
|
|
};
|
|
TEST_VERIFY (fcntl (fd, F_OFD_GETLK, &lck) == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|