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124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
/* Common function for preadv2 and pwritev2 tests.
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Copyright (C) 2017-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <limits.h>
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#include <support/check.h>
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#ifndef RWF_HIPRI
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# define RWF_HIPRI 0
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#endif
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#ifndef RWF_DSYNC
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# define RWF_DSYNC 0
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#endif
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#ifndef RWF_SYNC
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# define RWF_SYNC 0
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#endif
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#ifndef RWF_NOWAIT
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# define RWF_NOWAIT 0
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#endif
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#ifndef RWF_APPEND
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# define RWF_APPEND 0
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#endif
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#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT \
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| RWF_APPEND)
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/* Generic uio_lim.h does not define IOV_MAX. */
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#ifndef IOV_MAX
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# define IOV_MAX 1024
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#endif
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static void
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do_test_with_invalid_fd (void)
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{
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char buf[256];
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struct iovec iov = { buf, sizeof buf };
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/* Check with flag being 0 to use the fallback code which calls pwritev
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or writev. */
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TEST_VERIFY (preadv2 (-1, &iov, 1, -1, 0) == -1);
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TEST_COMPARE (errno, EBADF);
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TEST_VERIFY (pwritev2 (-1, &iov, 1, -1, 0) == -1);
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TEST_COMPARE (errno, EBADF);
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/* Same tests as before but with flags being different than 0. Since
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there is no emulation for any flag value, fallback code returns
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ENOTSUP. This is different running on a kernel with preadv2/pwritev2
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support, where EBADF is returned). */
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TEST_VERIFY (preadv2 (-1, &iov, 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EBADF || errno == ENOTSUP);
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TEST_VERIFY (pwritev2 (-1, &iov, 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EBADF || errno == ENOTSUP);
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}
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static void
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do_test_with_invalid_iov (void)
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{
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{
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char buf[256];
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struct iovec iov;
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iov.iov_base = buf;
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iov.iov_len = (size_t)SSIZE_MAX + 1;
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TEST_VERIFY (preadv2 (temp_fd, &iov, 1, 0, 0) == -1);
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TEST_COMPARE (errno, EINVAL);
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TEST_VERIFY (pwritev2 (temp_fd, &iov, 1, 0, 0) == -1);
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TEST_COMPARE (errno, EINVAL);
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/* Same as for invalid file descriptor tests, emulation fallback
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first checks for flag value and return ENOTSUP. */
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TEST_VERIFY (preadv2 (temp_fd, &iov, 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EINVAL || errno == ENOTSUP);
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TEST_VERIFY (pwritev2 (temp_fd, &iov, 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EINVAL || errno == ENOTSUP);
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}
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{
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/* An invalid iovec buffer should trigger an invalid memory access
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or an error (Linux for instance returns EFAULT). */
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struct iovec iov[IOV_MAX+1] = { 0 };
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TEST_VERIFY (preadv2 (temp_fd, iov, IOV_MAX + 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EINVAL || errno == ENOTSUP);
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TEST_VERIFY (pwritev2 (temp_fd, iov, IOV_MAX + 1, 0, RWF_HIPRI) == -1);
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TEST_VERIFY (errno == EINVAL || errno == ENOTSUP);
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}
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}
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static void
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do_test_with_invalid_flags (void)
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{
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/* Set the next bit from the mask of all supported flags. */
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int invalid_flag = RWF_SUPPORTED != 0 ? __builtin_clz (RWF_SUPPORTED) : 2;
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invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag);
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char buf[32];
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const struct iovec vec = { .iov_base = buf, .iov_len = sizeof (buf) };
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if (preadv2 (temp_fd, &vec, 1, 0, invalid_flag) != -1)
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FAIL_EXIT1 ("preadv2 did not fail with an invalid flag");
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if (errno != ENOTSUP)
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FAIL_EXIT1 ("preadv2 failure did not set errno to ENOTSUP (%d)", errno);
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/* This might fail for compat syscall (32 bits running on 64 bits kernel)
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due a kernel issue. */
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if (pwritev2 (temp_fd, &vec, 1, 0, invalid_flag) != -1)
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FAIL_EXIT1 ("pwritev2 did not fail with an invalid flag");
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if (errno != ENOTSUP)
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FAIL_EXIT1 ("pwritev2 failure did not set errno to ENOTSUP (%d)", errno);
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}
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