2017-12-22 17:55:40 +08:00
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/* Tests for copy_file_range.
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2022-01-02 02:54:23 +08:00
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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2017-12-22 17:55:40 +08:00
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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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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
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<https://www.gnu.org/licenses/>. */
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2017-12-22 17:55:40 +08:00
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#include <array_length.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/temp_file.h>
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#include <support/test-driver.h>
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#include <support/xunistd.h>
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/* Boolean flags which indicate whether to use pointers with explicit
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output flags. */
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static int do_inoff;
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static int do_outoff;
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/* Name and descriptors of the input files. Files are truncated and
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reopened (with O_RDWR) between tests. */
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static char *infile;
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static int infd;
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static char *outfile;
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static int outfd;
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/* Input and output offsets. Set according to do_inoff and do_outoff
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before the test. The offsets themselves are always set to
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zero. */
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static off64_t inoff;
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static off64_t *pinoff;
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static off64_t outoff;
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static off64_t *poutoff;
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2019-06-28 15:39:21 +08:00
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/* These are a collection of copy sizes used in tests. */
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2017-12-22 17:55:40 +08:00
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enum { maximum_size = 99999 };
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static const int typical_sizes[] =
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2019-06-28 15:39:21 +08:00
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{ 0, 1, 2, 3, 1024, 2048, 4096, 8191, 8192, 8193, maximum_size };
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2017-12-22 17:55:40 +08:00
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/* The random contents of this array can be used as a pattern to check
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for correct write operations. */
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static unsigned char random_data[maximum_size];
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/* The size chosen by the test harness. */
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static int current_size;
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/* Perform a copy of a file. */
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static void
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simple_file_copy (void)
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{
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xwrite (infd, random_data, current_size);
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int length;
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int in_skipped; /* Expected skipped bytes in input. */
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if (do_inoff)
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{
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xlseek (infd, 1, SEEK_SET);
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inoff = 2;
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length = current_size - 3;
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in_skipped = 2;
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}
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else
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{
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xlseek (infd, 3, SEEK_SET);
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length = current_size - 5;
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in_skipped = 3;
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}
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int out_skipped; /* Expected skipped bytes before the written data. */
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if (do_outoff)
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{
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xlseek (outfd, 4, SEEK_SET);
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outoff = 5;
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out_skipped = 5;
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}
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else
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{
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xlseek (outfd, 6, SEEK_SET);
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length = current_size - 6;
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out_skipped = 6;
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}
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if (length < 0)
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length = 0;
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TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
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length, 0), length);
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if (do_inoff)
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{
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TEST_COMPARE (inoff, 2 + length);
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
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}
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else
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 3 + length);
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if (do_outoff)
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{
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TEST_COMPARE (outoff, 5 + length);
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 4);
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}
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else
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 6 + length);
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struct stat64 st;
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xfstat (outfd, &st);
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if (length > 0)
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TEST_COMPARE (st.st_size, out_skipped + length);
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else
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{
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/* If we did not write anything, we also did not add any
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padding. */
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TEST_COMPARE (st.st_size, 0);
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return;
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}
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xlseek (outfd, 0, SEEK_SET);
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char *bytes = xmalloc (st.st_size);
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TEST_COMPARE (read (outfd, bytes, st.st_size), st.st_size);
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for (int i = 0; i < out_skipped; ++i)
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TEST_COMPARE (bytes[i], 0);
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TEST_VERIFY (memcmp (bytes + out_skipped, random_data + in_skipped,
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length) == 0);
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free (bytes);
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}
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/* Test that a short input file results in a shortened copy. */
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static void
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short_copy (void)
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{
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if (current_size == 0)
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/* Nothing to shorten. */
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return;
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/* Two subtests, one with offset 0 and current_size - 1 bytes, and
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another one with current_size bytes, but offset 1. */
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for (int shift = 0; shift < 2; ++shift)
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{
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if (test_verbose > 0)
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printf ("info: shift=%d\n", shift);
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xftruncate (infd, 0);
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xlseek (infd, 0, SEEK_SET);
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xwrite (infd, random_data, current_size - !shift);
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if (do_inoff)
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{
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inoff = shift;
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xlseek (infd, 2, SEEK_SET);
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}
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else
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{
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inoff = 3;
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xlseek (infd, shift, SEEK_SET);
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}
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ftruncate (outfd, 0);
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xlseek (outfd, 0, SEEK_SET);
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outoff = 0;
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/* First call copies current_size - 1 bytes. */
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TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
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current_size, 0), current_size - 1);
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char *buffer = xmalloc (current_size);
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TEST_COMPARE (pread64 (outfd, buffer, current_size, 0),
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current_size - 1);
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TEST_VERIFY (memcmp (buffer, random_data + shift, current_size - 1)
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== 0);
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free (buffer);
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if (do_inoff)
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{
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TEST_COMPARE (inoff, current_size - 1 + shift);
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
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}
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else
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
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if (do_outoff)
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{
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TEST_COMPARE (outoff, current_size - 1);
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
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}
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else
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
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/* First call copies zero bytes. */
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TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
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current_size, 0), 0);
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/* And the offsets are unchanged. */
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if (do_inoff)
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{
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TEST_COMPARE (inoff, current_size - 1 + shift);
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
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}
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else
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TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
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if (do_outoff)
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{
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TEST_COMPARE (outoff, current_size - 1);
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
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}
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else
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TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
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}
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}
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/* A named test function. */
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struct test_case
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{
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const char *name;
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void (*func) (void);
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bool sizes; /* If true, call the test with different current_size values. */
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};
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/* The available test cases. */
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static struct test_case tests[] =
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{
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{ "simple_file_copy", simple_file_copy, .sizes = true },
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{ "short_copy", short_copy, .sizes = true },
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};
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static int
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do_test (void)
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{
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for (unsigned char *p = random_data; p < array_end (random_data); ++p)
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*p = rand () >> 24;
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infd = create_temp_file ("tst-copy_file_range-in-", &infile);
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2019-06-28 15:39:21 +08:00
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outfd = create_temp_file ("tst-copy_file_range-out-", &outfile);
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2018-08-21 18:56:53 +08:00
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{
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2019-06-28 15:39:21 +08:00
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ssize_t ret = copy_file_range (infd, NULL, outfd, NULL, 0, 0);
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if (ret != 0)
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2017-12-22 17:55:40 +08:00
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{
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2019-06-28 15:39:21 +08:00
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("copy_file_range is not support on this system");
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FAIL_EXIT1 ("copy_file_range probing call: %m");
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2017-12-22 17:55:40 +08:00
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}
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}
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xclose (infd);
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2019-06-28 15:39:21 +08:00
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xclose (outfd);
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2017-12-22 17:55:40 +08:00
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for (do_inoff = 0; do_inoff < 2; ++do_inoff)
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for (do_outoff = 0; do_outoff < 2; ++do_outoff)
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for (struct test_case *test = tests; test < array_end (tests); ++test)
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for (const int *size = typical_sizes;
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size < array_end (typical_sizes); ++size)
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{
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current_size = *size;
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if (test_verbose > 0)
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printf ("info: %s do_inoff=%d do_outoff=%d current_size=%d\n",
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test->name, do_inoff, do_outoff, current_size);
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inoff = 0;
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if (do_inoff)
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pinoff = &inoff;
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else
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pinoff = NULL;
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outoff = 0;
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if (do_outoff)
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poutoff = &outoff;
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else
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poutoff = NULL;
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infd = xopen (infile, O_RDWR | O_LARGEFILE, 0);
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xftruncate (infd, 0);
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outfd = xopen (outfile, O_RDWR | O_LARGEFILE, 0);
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xftruncate (outfd, 0);
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test->func ();
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xclose (infd);
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xclose (outfd);
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if (!test->sizes)
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/* Skip the other sizes unless they have been
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requested. */
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break;
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}
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free (infile);
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free (outfile);
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return 0;
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}
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#include <support/test-driver.c>
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