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copy_file_range: New function to copy file data

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The semantics are based on the Linux system call, but a very close
emulation in user space is provided.
This commit is contained in:
Florian Weimer 2017-12-22 10:55:40 +01:00
parent 6cb86fd21c
commit bad7a0c81f
44 changed files with 1340 additions and 3 deletions
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21
ChangeLog
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@ -1,3 +1,24 @@
2017-12-22 Florian Weimer <fweimer@redhat.com>
* io/Makefile (routines): Add copy_file_range.
(tests): Add tst-copy_file_range.
(tests-static, tests-internal): Add tst-copy_file_range-compat.
* io/Versions (GLIBC_2.27): Export copy_file_range.
* io/copy_file_range-compat.c: New file.
* io/copy_file_range.c: Likewise.
* io/tst-copy_file_range-compat.c: Likewise.
* io/tst-copy_file_range.c: Likewise.
* manual/llio.texi (Copying File Data): New section.
* posix/unistd.h [__USE_GNU] (copy_file_range): Declare.
* support/Makefile (libsupport-routines): Add support-xfstat,
xftruncate, xlseek.
* support/support-xfstat.c: New file.
* support/xftruncate.c: Likewise.
* support/xlseek.c: Likewise.
* support/xunistd.h (xfstat, xftruncate, xlseek): Declare.
* sysdeps/unix/sysv/linux/**.abilist: Update.
* sysdeps/unix/sysv/linux/copy_file_range.c: New file.
2017-12-21 Szabolcs Nagy <szabolcs.nagy@arm.com>
* scripts/build-many-glibcs.py (Context.add_all_configs): Add

2
NEWS
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@ -61,6 +61,8 @@ Major new features:
declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
pkey_get.
* The copy_file_range function was added.
* Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
* The ldconfig utility now processes `include' directives using the C/POSIX

10
io/Makefile
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@ -52,7 +52,7 @@ routines := \
ftw ftw64 fts fts64 poll ppoll \
posix_fadvise posix_fadvise64 \
posix_fallocate posix_fallocate64 \
sendfile sendfile64 \
sendfile sendfile64 copy_file_range \
utimensat futimens
# These routines will be omitted from the libc shared object.
@ -70,7 +70,13 @@ tests := test-utime test-stat test-stat2 test-lfs tst-getcwd \
tst-symlinkat tst-linkat tst-readlinkat tst-mkdirat \
tst-mknodat tst-mkfifoat tst-ttyname_r bug-ftw5 \
tst-posix_fallocate tst-posix_fallocate64 \
tst-fts tst-fts-lfs tst-open-tmpfile
tst-fts tst-fts-lfs tst-open-tmpfile \
tst-copy_file_range \
# This test includes the compat implementation of copy_file_range,
# which uses internal, unexported libc functions.
tests-static += tst-copy_file_range-compat
tests-internal += tst-copy_file_range-compat
ifeq ($(run-built-tests),yes)
tests-special += $(objpfx)ftwtest.out

3
io/Versions
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@ -125,4 +125,7 @@ libc {
GLIBC_2.23 {
fts64_children; fts64_close; fts64_open; fts64_read; fts64_set;
}
GLIBC_2.27 {
copy_file_range;
}
}

160
io/copy_file_range-compat.c Normal file
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@ -0,0 +1,160 @@
/* Emulation of copy_file_range.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* The following macros should be defined before including this
file:
COPY_FILE_RANGE_DECL Declaration specifiers for the function below.
COPY_FILE_RANGE Name of the function to define. */
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
COPY_FILE_RANGE_DECL
ssize_t
COPY_FILE_RANGE (int infd, __off64_t *pinoff,
int outfd, __off64_t *poutoff,
size_t length, unsigned int flags)
{
if (flags != 0)
{
__set_errno (EINVAL);
return -1;
}
{
struct stat64 instat;
struct stat64 outstat;
if (fstat64 (infd, &instat) != 0 || fstat64 (outfd, &outstat) != 0)
return -1;
if (S_ISDIR (instat.st_mode) || S_ISDIR (outstat.st_mode))
{
__set_errno (EISDIR);
return -1;
}
if (!S_ISREG (instat.st_mode) || !S_ISREG (outstat.st_mode))
{
/* We need a regular input file so that the we can seek
backwards in case of a write failure. */
__set_errno (EINVAL);
return -1;
}
if (instat.st_dev != outstat.st_dev)
{
/* Cross-device copies are not supported. */
__set_errno (EXDEV);
return -1;
}
}
/* The output descriptor must not have O_APPEND set. */
{
int flags = __fcntl (outfd, F_GETFL);
if (flags & O_APPEND)
{
__set_errno (EBADF);
return -1;
}
}
/* Avoid an overflow in the result. */
if (length > SSIZE_MAX)
length = SSIZE_MAX;
/* Main copying loop. The buffer size is arbitrary and is a
trade-off between stack size consumption, cache usage, and
amortization of system call overhead. */
size_t copied = 0;
char buf[8192];
while (length > 0)
{
size_t to_read = length;
if (to_read > sizeof (buf))
to_read = sizeof (buf);
/* Fill the buffer. */
ssize_t read_count;
if (pinoff == NULL)
read_count = read (infd, buf, to_read);
else
read_count = __libc_pread64 (infd, buf, to_read, *pinoff);
if (read_count == 0)
/* End of file reached prematurely. */
return copied;
if (read_count < 0)
{
if (copied > 0)
/* Report the number of bytes copied so far. */
return copied;
return -1;
}
if (pinoff != NULL)
*pinoff += read_count;
/* Write the buffer part which was read to the destination. */
char *end = buf + read_count;
for (char *p = buf; p < end; )
{
ssize_t write_count;
if (poutoff == NULL)
write_count = write (outfd, p, end - p);
else
write_count = __libc_pwrite64 (outfd, p, end - p, *poutoff);
if (write_count < 0)
{
/* Adjust the input read position to match what we have
written, so that the caller can pick up after the
error. */
size_t written = p - buf;
/* NB: This needs to be signed so that we can form the
negative value below. */
ssize_t overread = read_count - written;
if (pinoff == NULL)
{
if (overread > 0)
{
/* We are on an error recovery path, so we
cannot deal with failure here. */
int save_errno = errno;
(void) __libc_lseek64 (infd, -overread, SEEK_CUR);
__set_errno (save_errno);
}
}
else /* pinoff != NULL */
*pinoff -= overread;
if (copied + written > 0)
/* Report the number of bytes copied so far. */
return copied + written;
return -1;
}
p += write_count;
if (poutoff != NULL)
*poutoff += write_count;
} /* Write loop. */
copied += read_count;
length -= read_count;
}
return copied;
}

22
io/copy_file_range.c Normal file
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@ -0,0 +1,22 @@
/* Generic implementation of copy_file_range.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define COPY_FILE_RANGE_DECL
#define COPY_FILE_RANGE copy_file_range
#include <io/copy_file_range-compat.c>

30
io/tst-copy_file_range-compat.c Normal file
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@ -0,0 +1,30 @@
/* Test the fallback implementation of copy_file_range.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* Get the declaration of the official copy_of_range function. */
#include <unistd.h>
/* Compile a local version of copy_file_range. */
#define COPY_FILE_RANGE_DECL static
#define COPY_FILE_RANGE copy_file_range_compat
#include <io/copy_file_range-compat.c>
/* Re-use the test, but run it against copy_file_range_compat defined
above. */
#define copy_file_range copy_file_range_compat
#include "tst-copy_file_range.c"

833
io/tst-copy_file_range.c Normal file
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@ -0,0 +1,833 @@
/* Tests for copy_file_range.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libgen.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/namespace.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
#include <sys/mount.h>
/* Boolean flags which indicate whether to use pointers with explicit
output flags. */
static int do_inoff;
static int do_outoff;
/* Name and descriptors of the input files. Files are truncated and
reopened (with O_RDWR) between tests. */
static char *infile;
static int infd;
static char *outfile;
static int outfd;
/* Like the above, but on a different file system. xdevfile can be
NULL if no suitable file system has been found. */
static char *xdevfile;
/* Input and output offsets. Set according to do_inoff and do_outoff
before the test. The offsets themselves are always set to
zero. */
static off64_t inoff;
static off64_t *pinoff;
static off64_t outoff;
static off64_t *poutoff;
/* These are a collection of copy sizes used in tests. The selection
takes into account that the fallback implementation uses an
internal buffer of 8192 bytes. */
enum { maximum_size = 99999 };
static const int typical_sizes[] =
{ 0, 1, 2, 3, 1024, 2048, 4096, 8191, 8192, 8193, 16383, 16384, 16385,
maximum_size };
/* The random contents of this array can be used as a pattern to check
for correct write operations. */
static unsigned char random_data[maximum_size];
/* The size chosen by the test harness. */
static int current_size;
/* Maximum writable file offset. Updated by find_maximum_offset
below. */
static off64_t maximum_offset;
/* Error code when crossing the offset. */
static int maximum_offset_errno;
/* If true: Writes which cross the limit will fail. If false: Writes
which cross the limit will result in a partial write. */
static bool maximum_offset_hard_limit;
/* Fills maximum_offset etc. above. Truncates outfd as a side
effect. */
static void
find_maximum_offset (void)
{
xftruncate (outfd, 0);
if (maximum_offset != 0)
return;
uint64_t upper = -1;
upper >>= 1; /* Maximum of off64_t. */
TEST_VERIFY ((off64_t) upper > 0);
TEST_VERIFY ((off64_t) (upper + 1) < 0);
if (lseek64 (outfd, upper, SEEK_SET) >= 0)
{
if (write (outfd, "", 1) == 1)
FAIL_EXIT1 ("created a file larger than the off64_t range");
}
uint64_t lower = 1024 * 1024; /* A reasonable minimum file size. */
/* Loop invariant: writing at lower succeeds, writing at upper fails. */
while (lower + 1 < upper)
{
uint64_t middle = (lower + upper) / 2;
if (test_verbose > 0)
printf ("info: %s: remaining test range %" PRIu64 " .. %" PRIu64
", probe at %" PRIu64 "\n", __func__, lower, upper, middle);
xftruncate (outfd, 0);
if (lseek64 (outfd, middle, SEEK_SET) >= 0
&& write (outfd, "", 1) == 1)
lower = middle;
else
upper = middle;
}
TEST_VERIFY (lower + 1 == upper);
maximum_offset = lower;
printf ("info: maximum writable file offset: %" PRIu64 " (%" PRIx64 ")\n",
lower, lower);
/* Check that writing at the valid offset actually works. */
xftruncate (outfd, 0);
xlseek (outfd, lower, SEEK_SET);
TEST_COMPARE (write (outfd, "", 1), 1);
/* Cross the boundary with a two-byte write. This can either result
in a short write, or a failure. */
xlseek (outfd, lower, SEEK_SET);
ssize_t ret = write (outfd, " ", 2);
if (ret < 0)
{
maximum_offset_errno = errno;
maximum_offset_hard_limit = true;
}
else
maximum_offset_hard_limit = false;
/* Check that writing at the next offset actually fails. This also
obtains the expected errno value. */
xftruncate (outfd, 0);
const char *action;
if (lseek64 (outfd, lower + 1, SEEK_SET) != 0)
{
if (write (outfd, "", 1) != -1)
FAIL_EXIT1 ("write to impossible offset %" PRIu64 " succeeded",
lower + 1);
action = "writing";
int errno_copy = errno;
if (maximum_offset_hard_limit)
TEST_COMPARE (errno_copy, maximum_offset_errno);
else
maximum_offset_errno = errno_copy;
}
else
{
action = "seeking";
maximum_offset_errno = errno;
}
printf ("info: %s out of range fails with %m (%d)\n",
action, maximum_offset_errno);
xftruncate (outfd, 0);
xlseek (outfd, 0, SEEK_SET);
}
/* Perform a copy of a file. */
static void
simple_file_copy (void)
{
xwrite (infd, random_data, current_size);
int length;
int in_skipped; /* Expected skipped bytes in input. */
if (do_inoff)
{
xlseek (infd, 1, SEEK_SET);
inoff = 2;
length = current_size - 3;
in_skipped = 2;
}
else
{
xlseek (infd, 3, SEEK_SET);
length = current_size - 5;
in_skipped = 3;
}
int out_skipped; /* Expected skipped bytes before the written data. */
if (do_outoff)
{
xlseek (outfd, 4, SEEK_SET);
outoff = 5;
out_skipped = 5;
}
else
{
xlseek (outfd, 6, SEEK_SET);
length = current_size - 6;
out_skipped = 6;
}
if (length < 0)
length = 0;
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
length, 0), length);
if (do_inoff)
{
TEST_COMPARE (inoff, 2 + length);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 3 + length);
if (do_outoff)
{
TEST_COMPARE (outoff, 5 + length);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 4);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 6 + length);
struct stat64 st;
xfstat (outfd, &st);
if (length > 0)
TEST_COMPARE (st.st_size, out_skipped + length);
else
{
/* If we did not write anything, we also did not add any
padding. */
TEST_COMPARE (st.st_size, 0);
return;
}
xlseek (outfd, 0, SEEK_SET);
char *bytes = xmalloc (st.st_size);
TEST_COMPARE (read (outfd, bytes, st.st_size), st.st_size);
for (int i = 0; i < out_skipped; ++i)
TEST_COMPARE (bytes[i], 0);
TEST_VERIFY (memcmp (bytes + out_skipped, random_data + in_skipped,
length) == 0);
free (bytes);
}
/* Test that reading from a pipe willfails. */
static void
pipe_as_source (void)
{
int pipefds[2];
xpipe (pipefds);
for (int length = 0; length < 2; ++length)
{
if (test_verbose > 0)
printf ("info: %s: length=%d\n", __func__, length);
/* Make sure that there is something to copy in the pipe. */
xwrite (pipefds[1], "@", 1);
TEST_COMPARE (copy_file_range (pipefds[0], pinoff, outfd, poutoff,
length, 0), -1);
/* Linux 4.10 and later return EINVAL. Older kernels return
EXDEV. */
TEST_VERIFY (errno == EINVAL || errno == EXDEV);
TEST_COMPARE (inoff, 0);
TEST_COMPARE (outoff, 0);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
/* Make sure that nothing was read. */
char buf = 'A';
TEST_COMPARE (read (pipefds[0], &buf, 1), 1);
TEST_COMPARE (buf, '@');
}
xclose (pipefds[0]);
xclose (pipefds[1]);
}
/* Test that writing to a pipe fails. */
static void
pipe_as_destination (void)
{
/* Make sure that there is something to read in the input file. */
xwrite (infd, "abc", 3);
xlseek (infd, 0, SEEK_SET);
int pipefds[2];
xpipe (pipefds);
for (int length = 0; length < 2; ++length)
{
if (test_verbose > 0)
printf ("info: %s: length=%d\n", __func__, length);
TEST_COMPARE (copy_file_range (infd, pinoff, pipefds[1], poutoff,
length, 0), -1);
/* Linux 4.10 and later return EINVAL. Older kernels return
EXDEV. */
TEST_VERIFY (errno == EINVAL || errno == EXDEV);
TEST_COMPARE (inoff, 0);
TEST_COMPARE (outoff, 0);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
/* Make sure that nothing was written. */
struct pollfd pollfd = { .fd = pipefds[0], .events = POLLIN, };
TEST_COMPARE (poll (&pollfd, 1, 0), 0);
}
xclose (pipefds[0]);
xclose (pipefds[1]);
}
/* Test a write failure after (potentially) writing some bytes.
Failure occurs near the start of the buffer. */
static void
delayed_write_failure_beginning (void)
{
/* We need to write something to provoke the error. */
if (current_size == 0)
return;
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
/* Write failure near the start. The actual error code varies among
file systems. */
find_maximum_offset ();
off64_t where = maximum_offset;
if (current_size == 1)
++where;
outoff = where;
if (do_outoff)
xlseek (outfd, 1, SEEK_SET);
else
xlseek (outfd, where, SEEK_SET);
if (maximum_offset_hard_limit || where > maximum_offset)
{
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), -1);
TEST_COMPARE (errno, maximum_offset_errno);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
TEST_COMPARE (inoff, 0);
if (do_outoff)
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 1);
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), where);
TEST_COMPARE (outoff, where);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, 0);
}
else
{
/* The offset is not a hard limit. This means we write one
byte. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), 1);
if (do_inoff)
{
TEST_COMPARE (inoff, 1);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
}
else
{
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 1);
TEST_COMPARE (inoff, 0);
}
if (do_outoff)
{
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 1);
TEST_COMPARE (outoff, where + 1);
}
else
{
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), where + 1);
TEST_COMPARE (outoff, where);
}
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, where + 1);
}
}
/* Test a write failure after (potentially) writing some bytes.
Failure occurs near the end of the buffer. */
static void
delayed_write_failure_end (void)
{
if (current_size <= 1)
/* This would be same as the first test because there is not
enough data to write to make a difference. */
return;
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
find_maximum_offset ();
off64_t where = maximum_offset - current_size + 1;
if (current_size == sizeof (random_data))
/* Otherwise we do not reach the non-writable byte. */
++where;
outoff = where;
if (do_outoff)
xlseek (outfd, 1, SEEK_SET);
else
xlseek (outfd, where, SEEK_SET);
ssize_t ret = copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0);
if (ret < 0)
{
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, maximum_offset_errno);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, 0);
}
else
{
/* The first copy succeeded. This happens in the emulation
because the internal buffer of limited size does not
necessarily cross the off64_t boundary on the first write
operation. */
if (test_verbose > 0)
printf ("info: copy_file_range (%zu) returned %zd\n",
sizeof (random_data), ret);
TEST_VERIFY (ret > 0);
TEST_VERIFY (ret < maximum_size);
struct stat64 st;
xfstat (outfd, &st);
TEST_COMPARE (st.st_size, where + ret);
if (do_inoff)
{
TEST_COMPARE (inoff, ret);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), ret);
char *buffer = xmalloc (ret);
TEST_COMPARE (pread64 (outfd, buffer, ret, where), ret);
TEST_VERIFY (memcmp (buffer, random_data, ret) == 0);
free (buffer);
/* The second copy fails. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
sizeof (random_data), 0), -1);
TEST_COMPARE (errno, maximum_offset_errno);
}
}
/* Test a write failure across devices. */
static void
cross_device_failure (void)
{
if (xdevfile == NULL)
/* Subtest not supported due to missing cross-device file. */
return;
/* We need something to write. */
xwrite (infd, random_data, sizeof (random_data));
xlseek (infd, 0, SEEK_SET);
int xdevfd = xopen (xdevfile, O_RDWR | O_LARGEFILE, 0);
TEST_COMPARE (copy_file_range (infd, pinoff, xdevfd, poutoff,
current_size, 0), -1);
TEST_COMPARE (errno, EXDEV);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 0);
struct stat64 st;
xfstat (xdevfd, &st);
TEST_COMPARE (st.st_size, 0);
xclose (xdevfd);
}
/* Try to exercise ENOSPC behavior with a tempfs file system (so that
we do not have to fill up a regular file system to get the error).
This function runs in a subprocess, so that we do not change the
mount namespace of the actual test process. */
static void
enospc_failure_1 (void *closure)
{
#ifdef CLONE_NEWNS
support_become_root ();
/* Make sure that we do not alter the file system mounts of the
parents. */
if (! support_enter_mount_namespace ())
{
printf ("warning: ENOSPC test skipped\n");
return;
}
char *mountpoint = closure;
if (mount ("none", mountpoint, "tmpfs", MS_NODEV | MS_NOEXEC,
"size=500k") != 0)
{
printf ("warning: could not mount tmpfs at %s: %m\n", mountpoint);
return;
}
/* The source file must reside on the same file system. */
char *intmpfsfile = xasprintf ("%s/%s", mountpoint, "in");
int intmpfsfd = xopen (intmpfsfile, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
xwrite (intmpfsfd, random_data, sizeof (random_data));
xlseek (intmpfsfd, 1, SEEK_SET);
inoff = 1;
char *outtmpfsfile = xasprintf ("%s/%s", mountpoint, "out");
int outtmpfsfd = xopen (outtmpfsfile, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
/* Fill the file with data until ENOSPC is reached. */
while (true)
{
ssize_t ret = write (outtmpfsfd, random_data, sizeof (random_data));
if (ret < 0 && errno != ENOSPC)
FAIL_EXIT1 ("write to %s: %m", outtmpfsfile);
if (ret < sizeof (random_data))
break;
}
TEST_COMPARE (write (outtmpfsfd, "", 1), -1);
TEST_COMPARE (errno, ENOSPC);
off64_t maxsize = xlseek (outtmpfsfd, 0, SEEK_CUR);
TEST_VERIFY_EXIT (maxsize > sizeof (random_data));
/* Constructed the expected file contents. */
char *expected = xmalloc (maxsize);
TEST_COMPARE (pread64 (outtmpfsfd, expected, maxsize, 0), maxsize);
/* Go back a little, so some bytes can be written. */
enum { offset = 20000 };
TEST_VERIFY_EXIT (offset < maxsize);
TEST_VERIFY_EXIT (offset < sizeof (random_data));
memcpy (expected + maxsize - offset, random_data + 1, offset);
if (do_outoff)
{
outoff = maxsize - offset;
xlseek (outtmpfsfd, 2, SEEK_SET);
}
else
xlseek (outtmpfsfd, -offset, SEEK_CUR);
/* First call is expected to succeed because we made room for some
bytes. */
TEST_COMPARE (copy_file_range (intmpfsfd, pinoff, outtmpfsfd, poutoff,
maximum_size, 0), offset);
if (do_inoff)
{
TEST_COMPARE (inoff, 1 + offset);
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1 + offset);
if (do_outoff)
{
TEST_COMPARE (outoff, maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), maxsize);
struct stat64 st;
xfstat (outtmpfsfd, &st);
TEST_COMPARE (st.st_size, maxsize);
char *actual = xmalloc (st.st_size);
TEST_COMPARE (pread64 (outtmpfsfd, actual, st.st_size, 0), st.st_size);
TEST_VERIFY (memcmp (expected, actual, maxsize) == 0);
/* Second call should fail with ENOSPC. */
TEST_COMPARE (copy_file_range (intmpfsfd, pinoff, outtmpfsfd, poutoff,
maximum_size, 0), -1);
TEST_COMPARE (errno, ENOSPC);
/* Offsets should be unchanged. */
if (do_inoff)
{
TEST_COMPARE (inoff, 1 + offset);
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1);
}
else
TEST_COMPARE (xlseek (intmpfsfd, 0, SEEK_CUR), 1 + offset);
if (do_outoff)
{
TEST_COMPARE (outoff, maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_CUR), maxsize);
TEST_COMPARE (xlseek (outtmpfsfd, 0, SEEK_END), maxsize);
TEST_COMPARE (pread64 (outtmpfsfd, actual, maxsize, 0), maxsize);
TEST_VERIFY (memcmp (expected, actual, maxsize) == 0);
free (actual);
free (expected);
xclose (intmpfsfd);
xclose (outtmpfsfd);
free (intmpfsfile);
free (outtmpfsfile);
#else /* !CLONE_NEWNS */
puts ("warning: ENOSPC test skipped (no mount namespaces)");
#endif
}
/* Call enospc_failure_1 in a subprocess. */
static void
enospc_failure (void)
{
char *mountpoint
= support_create_temp_directory ("tst-copy_file_range-enospc-");
support_isolate_in_subprocess (enospc_failure_1, mountpoint);
free (mountpoint);
}
/* The target file descriptor must have O_APPEND enabled. */
static void
oappend_failure (void)
{
/* Add data, to make sure we do not fail because there is
insufficient input data. */
xwrite (infd, random_data, current_size);
xlseek (infd, 0, SEEK_SET);
xclose (outfd);
outfd = xopen (outfile, O_RDWR | O_APPEND, 0);
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), -1);
TEST_COMPARE (errno, EBADF);
}
/* Test that a short input file results in a shortened copy. */
static void
short_copy (void)
{
if (current_size == 0)
/* Nothing to shorten. */
return;
/* Two subtests, one with offset 0 and current_size - 1 bytes, and
another one with current_size bytes, but offset 1. */
for (int shift = 0; shift < 2; ++shift)
{
if (test_verbose > 0)
printf ("info: shift=%d\n", shift);
xftruncate (infd, 0);
xlseek (infd, 0, SEEK_SET);
xwrite (infd, random_data, current_size - !shift);
if (do_inoff)
{
inoff = shift;
xlseek (infd, 2, SEEK_SET);
}
else
{
inoff = 3;
xlseek (infd, shift, SEEK_SET);
}
ftruncate (outfd, 0);
xlseek (outfd, 0, SEEK_SET);
outoff = 0;
/* First call copies current_size - 1 bytes. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), current_size - 1);
char *buffer = xmalloc (current_size);
TEST_COMPARE (pread64 (outfd, buffer, current_size, 0),
current_size - 1);
TEST_VERIFY (memcmp (buffer, random_data + shift, current_size - 1)
== 0);
free (buffer);
if (do_inoff)
{
TEST_COMPARE (inoff, current_size - 1 + shift);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
if (do_outoff)
{
TEST_COMPARE (outoff, current_size - 1);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
/* First call copies zero bytes. */
TEST_COMPARE (copy_file_range (infd, pinoff, outfd, poutoff,
current_size, 0), 0);
/* And the offsets are unchanged. */
if (do_inoff)
{
TEST_COMPARE (inoff, current_size - 1 + shift);
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), 2);
}
else
TEST_COMPARE (xlseek (infd, 0, SEEK_CUR), current_size - 1 + shift);
if (do_outoff)
{
TEST_COMPARE (outoff, current_size - 1);
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), 0);
}
else
TEST_COMPARE (xlseek (outfd, 0, SEEK_CUR), current_size - 1);
}
}
/* A named test function. */
struct test_case
{
const char *name;
void (*func) (void);
bool sizes; /* If true, call the test with different current_size values. */
};
/* The available test cases. */
static struct test_case tests[] =
{
{ "simple_file_copy", simple_file_copy, .sizes = true },
{ "pipe_as_source", pipe_as_source, },
{ "pipe_as_destination", pipe_as_destination, },
{ "delayed_write_failure_beginning", delayed_write_failure_beginning,
.sizes = true },
{ "delayed_write_failure_end", delayed_write_failure_end, .sizes = true },
{ "cross_device_failure", cross_device_failure, .sizes = true },
{ "enospc_failure", enospc_failure, },
{ "oappend_failure", oappend_failure, .sizes = true },
{ "short_copy", short_copy, .sizes = true },
};
static int
do_test (void)
{
for (unsigned char *p = random_data; p < array_end (random_data); ++p)
*p = rand () >> 24;
infd = create_temp_file ("tst-copy_file_range-in-", &infile);
xclose (create_temp_file ("tst-copy_file_range-out-", &outfile));
/* Try to find a different directory from the default input/output
file. */
{
struct stat64 instat;
xfstat (infd, &instat);
static const char *const candidates[] =
{ NULL, "/var/tmp", "/dev/shm" };
for (const char *const *c = candidates; c < array_end (candidates); ++c)
{
const char *path = *c;
char *to_free = NULL;
if (path == NULL)
{
to_free = xreadlink ("/proc/self/exe");
path = dirname (to_free);
}
struct stat64 cstat;
xstat (path, &cstat);
if (cstat.st_dev == instat.st_dev)
{
free (to_free);
continue;
}
printf ("info: using alternate temporary files directory: %s\n", path);
xdevfile = xasprintf ("%s/tst-copy_file_range-xdev-XXXXXX", path);
free (to_free);
break;
}
if (xdevfile != NULL)
{
int xdevfd = mkstemp (xdevfile);
if (xdevfd < 0)
FAIL_EXIT1 ("mkstemp (\"%s\"): %m", xdevfile);
struct stat64 xdevst;
xfstat (xdevfd, &xdevst);
TEST_VERIFY (xdevst.st_dev != instat.st_dev);
add_temp_file (xdevfile);
xclose (xdevfd);
}
else
puts ("warning: no alternate directory on different file system found");
}
xclose (infd);
for (do_inoff = 0; do_inoff < 2; ++do_inoff)
for (do_outoff = 0; do_outoff < 2; ++do_outoff)
for (struct test_case *test = tests; test < array_end (tests); ++test)
for (const int *size = typical_sizes;
size < array_end (typical_sizes); ++size)
{
current_size = *size;
if (test_verbose > 0)
printf ("info: %s do_inoff=%d do_outoff=%d current_size=%d\n",
test->name, do_inoff, do_outoff, current_size);
inoff = 0;
if (do_inoff)
pinoff = &inoff;
else
pinoff = NULL;
outoff = 0;
if (do_outoff)
poutoff = &outoff;
else
poutoff = NULL;
infd = xopen (infile, O_RDWR | O_LARGEFILE, 0);
xftruncate (infd, 0);
outfd = xopen (outfile, O_RDWR | O_LARGEFILE, 0);
xftruncate (outfd, 0);
test->func ();
xclose (infd);
xclose (outfd);
if (!test->sizes)
/* Skip the other sizes unless they have been
requested. */
break;
}
free (infile);
free (outfile);
free (xdevfile);
return 0;
}
#include <support/test-driver.c>

88
manual/llio.texi
View File

@ -41,6 +41,7 @@ directly.)
* Stream/Descriptor Precautions:: Precautions needed if you use both
descriptors and streams.
* Scatter-Gather:: Fast I/O to discontinuous buffers.
* Copying File Data:: Copying data between files.
* Memory-mapped I/O:: Using files like memory.
* Waiting for I/O:: How to check for input or output
on multiple file descriptors.
@ -1353,6 +1354,93 @@ When the source file is compiled using @code{_FILE_OFFSET_BITS == 64} on a
@code{pwritev2} and so transparently replaces the 32 bit interface.
@end deftypefun
@node Copying File Data
@section Copying data between two files
@cindex copying files
@cindex file copy
A special function is provided to copy data between two files on the
same file system. The system can optimize such copy operations. This
is particularly important on network file systems, where the data would
otherwise have to be transferred twice over the network.
Note that this function only copies file data, but not metadata such as
file permissions or extended attributes.
@deftypefun ssize_t copy_file_range (int @var{inputfd}, off64_t *@var{inputpos}, int @var{outputfd}, off64_t *@var{outputpos}, ssize_t @var{length}, unsigned int @var{flags})
@standards{GNU, unistd.h}
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
This function copies up to @var{length} bytes from the file descriptor
@var{inputfd} to the file descriptor @var{outputfd}.
The function can operate on both the current file position (like
@code{read} and @code{write}) and an explicit offset (like @code{pread}
and @code{pwrite}). If the @var{inputpos} pointer is null, the file
position of @var{inputfd} is used as the starting point of the copy
operation, and the file position is advanced during it. If
@var{inputpos} is not null, then @code{*@var{inputpos}} is used as the
starting point of the copy operation, and @code{*@var{inputpos}} is
incremented by the number of copied bytes, but the file position remains
unchanged. Similar rules apply to @var{outputfd} and @var{outputpos}
for the output file position.
The @var{flags} argument is currently reserved and must be zero.
The @code{copy_file_range} function returns the number of bytes copied.
This can be less than the specified @var{length} in case the input file
contains fewer remaining bytes than @var{length}, or if a read or write
failure occurs. The return value is zero if the end of the input file
is encountered immediately.
If no bytes can be copied, to report an error, @code{copy_file_range}
returns the value @math{-1} and sets @code{errno}. The following
@code{errno} error conditions are specific to this function:
@table @code
@item EISDIR
At least one of the descriptors @var{inputfd} or @var{outputfd} refers
to a directory.
@item EINVAL
At least one of the descriptors @var{inputfd} or @var{outputfd} refers
to a non-regular, non-directory file (such as a socket or a FIFO).
The input or output positions before are after the copy operations are
outside of an implementation-defined limit.
The @var{flags} argument is not zero.
@item EFBIG
The new file size would exceed the process file size limit.
@xref{Limits on Resources}.
The input or output positions before are after the copy operations are
outside of an implementation-defined limit. This can happen if the file
was not opened with large file support (LFS) on 32-bit machines, and the
copy operation would create a file which is larger than what
@code{off_t} could represent.
@item EBADF
The argument @var{inputfd} is not a valid file descriptor open for
reading.
The argument @var{outputfd} is not a valid file descriptor open for
writing, or @var{outputfd} has been opened with @code{O_APPEND}.
@item EXDEV
The input and output files reside on different file systems.
@end table
In addition, @code{copy_file_range} can fail with the error codes
which are used by @code{read}, @code{pread}, @code{write}, and
@code{pwrite}.
The @code{copy_file_range} function is a cancellation point. In case of
cancellation, the input location (the file position or the value at
@code{*@var{inputpos}}) is indeterminate.
@end deftypefun
@node Memory-mapped I/O
@section Memory-mapped I/O

7
posix/unistd.h
View File

@ -1105,7 +1105,12 @@ extern int lockf64 (int __fd, int __cmd, __off64_t __len) __wur;
do __result = (long int) (expression); \
while (__result == -1L && errno == EINTR); \
__result; }))
#endif
/* Copy LENGTH bytes from INFD to OUTFD. */
ssize_t copy_file_range (int __infd, __off64_t *__pinoff,
int __outfd, __off64_t *__poutoff,
size_t __length, unsigned int __flags);
#endif /* __USE_GNU */
#if defined __USE_POSIX199309 || defined __USE_UNIX98
/* Synchronize at least the data part of a file with the underlying

3
support/Makefile
View File

@ -36,6 +36,7 @@ libsupport-routines = \
oom_error \
resolv_test \
set_fortify_handler \
support-xfstat \
support-xstat \
support_become_root \
support_can_chroot \
@ -73,8 +74,10 @@ libsupport-routines = \
xfclose \
xfopen \
xfork \
xftruncate \
xgetsockname \
xlisten \
xlseek \
xmalloc \
xmemstream \
xmkdir \

28
support/support-xfstat.c Normal file
View File

@ -0,0 +1,28 @@
/* fstat64 with error checking.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/xunistd.h>
#include <sys/stat.h>
void
xfstat (int fd, struct stat64 *result)
{
if (fstat64 (fd, result) != 0)
FAIL_EXIT1 ("fstat64 (%d): %m", fd);
}

27
support/xftruncate.c Normal file
View File

@ -0,0 +1,27 @@
/* ftruncate with error checking.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/xunistd.h>
void
xftruncate (int fd, long long length)
{
if (ftruncate64 (fd, length) != 0)
FAIL_EXIT1 ("ftruncate64 (%d, %lld): %m", fd, length);
}

29
support/xlseek.c Normal file
View File

@ -0,0 +1,29 @@
/* lseek with error checking.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/xunistd.h>
long long
xlseek (int fd, long long offset, int whence)
{
long long result = lseek64 (fd, offset, whence);
if (result < 0)
FAIL_EXIT1 ("lseek64 (%d, %lld, %d): %m", fd, offset, whence);
return result;
}

3
support/xunistd.h
View File

@ -36,10 +36,13 @@ void xpipe (int[2]);
void xdup2 (int, int);
int xopen (const char *path, int flags, mode_t);
void xstat (const char *path, struct stat64 *);
void xfstat (int fd, struct stat64 *);
void xmkdir (const char *path, mode_t);
void xchroot (const char *path);
void xunlink (const char *path);
long xsysconf (int name);
long long xlseek (int fd, long long offset, int whence);
void xftruncate (int fd, long long length);
/* Read the link at PATH. The caller should free the returned string
with free. */

1
sysdeps/unix/sysv/linux/aarch64/libc.abilist
View File

@ -2104,6 +2104,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/alpha/libc.abilist
View File

@ -2015,6 +2015,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/arm/libc.abilist
View File

@ -105,6 +105,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

46
sysdeps/unix/sysv/linux/copy_file_range.c Normal file
View File

@ -0,0 +1,46 @@
/* Linux implementation of copy_file_range.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sysdep-cancel.h>
#include <unistd.h>
/* Include the fallback implementation. */
#ifndef __ASSUME_COPY_FILE_RANGE
#define COPY_FILE_RANGE_DECL static
#define COPY_FILE_RANGE copy_file_range_compat
#include <io/copy_file_range-compat.c>
#endif
ssize_t
copy_file_range (int infd, __off64_t *pinoff,
int outfd, __off64_t *poutoff,
size_t length, unsigned int flags)
{
#ifdef __NR_copy_file_range
ssize_t ret = SYSCALL_CANCEL (copy_file_range, infd, pinoff, outfd, poutoff,
length, flags);
# ifndef __ASSUME_COPY_FILE_RANGE
if (ret == -1 && errno == ENOSYS)
ret = copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags);
# endif
return ret;
#else /* !__NR_copy_file_range */
return copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags);
#endif
}

1
sysdeps/unix/sysv/linux/hppa/libc.abilist
View File

@ -1869,6 +1869,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/i386/libc.abilist
View File

@ -2034,6 +2034,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/ia64/libc.abilist
View File

@ -1898,6 +1898,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

4
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -111,3 +111,7 @@
#if __LINUX_KERNEL_VERSION >= 0x040400
# define __ASSUME_MLOCK2 1
#endif
#if __LINUX_KERNEL_VERSION >= 0x040500
# define __ASSUME_COPY_FILE_RANGE 1
#endif

1
sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
View File

@ -106,6 +106,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
View File

@ -1983,6 +1983,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/microblaze/libc.abilist
View File

@ -2104,6 +2104,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
View File

@ -1958,6 +1958,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
View File

@ -1956,6 +1956,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
View File

@ -1954,6 +1954,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
View File

@ -1949,6 +1949,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/nios2/libc.abilist
View File

@ -2145,6 +2145,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
View File

@ -1987,6 +1987,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
View File

@ -1992,6 +1992,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
View File

@ -2199,6 +2199,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
View File

@ -106,6 +106,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
View File

@ -1987,6 +1987,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
View File

@ -1888,6 +1888,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/sh/libc.abilist
View File

@ -1873,6 +1873,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
View File

@ -1980,6 +1980,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@ -1917,6 +1917,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/tile/tilegx32/libc.abilist
View File

@ -2111,6 +2111,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/tile/tilegx64/libc.abilist
View File

@ -2111,6 +2111,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
View File

@ -1875,6 +1875,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F

1
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
View File

@ -2118,6 +2118,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
GLIBC_2.27 copy_file_range F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F