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Consolidate Linux ftruncate implementations

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THis patch consolidates all Linux ftruncate implementation on
sysdeps/unix/sysv/linux/ftruncate{64}.c.  It is based on
{INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction.

General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not
defined, otherwise ftruncate64 will be build and ftruncate will be an
alias.  The fallocate will use old compat syscall and pass 32-bit off_t
argument, while fallocate64 will handle the correct off64_t passing using
__ALIGNMENT_ARG and SYSCALL_LL64 macros.

Tested on x86_64, i386, aarch64, and armhf.

	* posix/tst-truncate-common.c: New file.
	* posix/tst-truncate.c: Use tst-truncate-common.c.
	* posix/tst-truncate64.c: Likewise and add LFS tests.
	* sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/ftruncate.c: New file.
	* sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use
	INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
	[__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate):
	Remove.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate):
	Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
This commit is contained in:
Adhemerval Zanella 2016-08-26 10:42:58 -03:00
parent 5874510faa
commit 87686aeefd
14 changed files with 155 additions and 275 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
ChangeLog
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@ -1,3 +1,24 @@
2016-11-09 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* posix/tst-truncate-common.c: New file.
* posix/tst-truncate.c: Use tst-truncate-common.c.
* posix/tst-truncate64.c: Likewise and add LFS tests.
* sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise.
* sysdeps/unix/sysv/linux/ftruncate.c: New file.
* sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use
INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
[__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate):
Remove.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate):
Likewise.
2016-11-08 Joseph Myers <joseph@codesourcery.com>
[BZ #20790]

88
posix/tst-truncate-common.c Normal file
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@ -0,0 +1,88 @@
/* Common f{truncate} tests definitions.
Copyright (C) 2016 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 <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
static void do_prepare (void);
#define PREPARE(argc, argv) do_prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include <test-skeleton.c>
static char *temp_filename;
static int temp_fd;
static void
do_prepare (void)
{
temp_fd = create_temp_file ("tst-trucate.", &temp_filename);
if (temp_fd == -1)
{
printf ("cannot create temporary file: %m\n");
exit (1);
}
}
#define FAIL(str) \
do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0)
static int
do_test_with_offset (off_t offset)
{
struct stat st;
char buf[1000];
memset (buf, 0xcf, sizeof (buf));
if (pwrite (temp_fd, buf, sizeof (buf), offset) != sizeof (buf))
FAIL ("write failed");
if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + sizeof (buf)))
FAIL ("initial size wrong");
if (ftruncate (temp_fd, offset + 800) < 0)
FAIL ("size reduction with ftruncate failed");
if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 800))
FAIL ("size after reduction with ftruncate is incorrect");
/* The following test covers more than POSIX. POSIX does not require
that ftruncate() can increase the file size. But we are testing
Unix systems. */
if (ftruncate (temp_fd, offset + 1200) < 0)
FAIL ("size increate with ftruncate failed");
if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 1200))
FAIL ("size after increase is incorrect");
if (truncate (temp_filename, offset + 800) < 0)
FAIL ("size reduction with truncate failed");
if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 800))
FAIL ("size after reduction with truncate incorrect");
/* The following test covers more than POSIX. POSIX does not require
that truncate() can increase the file size. But we are testing
Unix systems. */
if (truncate (temp_filename, (offset + 1200)) < 0)
FAIL ("size increase with truncate failed");
if (fstat (temp_fd, &st) < 0 || st.st_size != (offset + 1200))
FAIL ("size increase with truncate is incorrect");
return 0;
}

114
posix/tst-truncate.c
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@ -17,116 +17,10 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <error.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "tst-truncate-common.c"
/* Allow testing of the 64-bit versions as well. */
#ifndef TRUNCATE
# define TRUNCATE truncate
# define FTRUNCATE ftruncate
#endif
#define STRINGIFY(s) STRINGIFY2 (s)
#define STRINGIFY2(s) #s
/* Prototype for our test function. */
extern void do_prepare (int argc, char *argv[]);
extern int do_test (int argc, char *argv[]);
/* We have a preparation function. */
#define PREPARE do_prepare
/* We might need a bit longer timeout. */
#define TIMEOUT 20 /* sec */
/* This defines the `main' function and some more. */
#include <test-skeleton.c>
/* These are for the temporary file we generate. */
char *name;
int fd;
void
do_prepare (int argc, char *argv[])
static int
do_test (void)
{
size_t name_len;
#define FNAME FNAME2(TRUNCATE)
#define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
name_len = strlen (test_dir);
name = xmalloc (name_len + sizeof (FNAME));
mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
add_temp_file (name);
/* Open our test file. */
fd = mkstemp (name);
if (fd == -1)
error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
}
int
do_test (int argc, char *argv[])
{
struct stat st;
char buf[1000];
memset (buf, '\0', sizeof (buf));
if (write (fd, buf, sizeof (buf)) != sizeof (buf))
error (EXIT_FAILURE, errno, "during write");
if (fstat (fd, &st) < 0 || st.st_size != sizeof (buf))
error (EXIT_FAILURE, 0, "initial size wrong");
if (FTRUNCATE (fd, 800) < 0)
error (EXIT_FAILURE, errno, "size reduction with %s failed",
STRINGIFY (FTRUNCATE));
if (fstat (fd, &st) < 0 || st.st_size != 800)
error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
STRINGIFY (FTRUNCATE));
/* The following test covers more than POSIX. POSIX does not require
that ftruncate() can increase the file size. But we are testing
Unix systems. */
if (FTRUNCATE (fd, 1200) < 0)
error (EXIT_FAILURE, errno, "size increase with %s failed",
STRINGIFY (FTRUNCATE));
if (fstat (fd, &st) < 0 || st.st_size != 1200)
error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
STRINGIFY (FTRUNCATE));
if (TRUNCATE (name, 800) < 0)
error (EXIT_FAILURE, errno, "size reduction with %s failed",
STRINGIFY (TRUNCATE));
if (fstat (fd, &st) < 0 || st.st_size != 800)
error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
STRINGIFY (TRUNCATE));
/* The following test covers more than POSIX. POSIX does not require
that truncate() can increase the file size. But we are testing
Unix systems. */
if (TRUNCATE (name, 1200) < 0)
error (EXIT_FAILURE, errno, "size increase with %s failed",
STRINGIFY (TRUNCATE));
if (fstat (fd, &st) < 0 || st.st_size != 1200)
error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
STRINGIFY (TRUNCATE));
close (fd);
unlink (name);
return 0;
return do_test_with_offset (0);
}

21
posix/tst-truncate64.c
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@ -17,7 +17,22 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define TRUNCATE truncate64
#define FTRUNCATE ftruncate64
#define _FILE_OFFSET_BITS 64
#include "tst-truncate-common.c"
#include "tst-truncate.c"
static int
do_test (void)
{
int ret;
ret = do_test_with_offset (0);
if (ret == -1)
return -1;
off_t base_offset = UINT32_MAX + 512LL;
ret = do_test_with_offset (base_offset);
if (ret == -1)
return 1;
return 0;
}

36
sysdeps/unix/sysv/linux/arm/ftruncate64.c
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@ -1,36 +0,0 @@
/* Copyright (C) 1997-2016 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 <sys/types.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
__ftruncate64 (int fd, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (ftruncate64, 4, fd, 0,
__LONG_LONG_PAIR (high, low));
return result;
}
weak_alias (__ftruncate64, ftruncate64)

20
sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c → sysdeps/unix/sysv/linux/ftruncate.c
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@ -1,6 +1,5 @@
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
/* Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@ -16,16 +15,21 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <sysdep.h>
#include <errno.h>
/* Truncate the file FD refers to to LENGTH bytes. */
#ifndef __OFF_T_MATCHES_OFF64_T
/* Truncate the file FD refers to LENGTH bytes. */
int
__ftruncate (int fd, off_t length)
{
return INLINE_SYSCALL (ftruncate64, __ALIGNMENT_COUNT (3, 4), fd,
__ALIGNMENT_ARG
__LONG_LONG_PAIR (length >> 31, length));
# ifndef __NR_ftruncate
return INLINE_SYSCALL_CALL (ftruncate64, fd,
__ALIGNMENT_ARG SYSCALL_LL (length));
# else
return INLINE_SYSCALL_CALL (ftruncate, fd, length);
# endif
}
weak_alias (__ftruncate, ftruncate)
#endif

22
sysdeps/unix/sysv/linux/ftruncate64.c
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@ -15,22 +15,24 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <errno.h>
#ifndef __NR_ftruncate64
# define __NR_ftruncate64 __NR_ftruncate
#endif
/* Truncate the file referenced by FD to LENGTH bytes. */
int
__ftruncate64 (int fd, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (ftruncate64, 3, fd,
__LONG_LONG_PAIR (high, low));
return result;
return INLINE_SYSCALL_CALL (ftruncate64, fd,
__ALIGNMENT_ARG SYSCALL_LL64 (length));
}
weak_alias (__ftruncate64, ftruncate64)
#ifdef __OFF_T_MATCHES_OFF64_T
weak_alias (__ftruncate64, __ftruncate)
weak_alias (__ftruncate64, ftruncate);
#endif

32
sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c
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@ -1,32 +0,0 @@
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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 <sys/types.h>
#include <unistd.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
__ftruncate64 (int fd, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
return INLINE_SYSCALL (ftruncate64, __ALIGNMENT_COUNT (3, 4), fd,
__ALIGNMENT_ARG __LONG_LONG_PAIR (high, low));
}
weak_alias (__ftruncate64, ftruncate64)

36
sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c
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@ -1,36 +0,0 @@
/* Copyright (C) 1997-2016 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 <sys/types.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
__ftruncate64 (int fd, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (ftruncate64, 4, fd, 0,
__LONG_LONG_PAIR (high, low));
return result;
}
weak_alias (__ftruncate64, ftruncate64)

1
sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c
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@ -1 +0,0 @@
/* Empty. */

1
sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
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@ -1,6 +1,5 @@
# File name Caller Syscall name Args Strong name Weak names
ftruncate - ftruncate i:ii __ftruncate ftruncate ftruncate64 __ftruncate64
truncate - truncate i:si truncate truncate64
# Semaphore and shm system calls. msgctl, shmctl, and semctl have C

36
sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c
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@ -1,36 +0,0 @@
/* Copyright (C) 1997-2016 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 <sys/types.h>
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Truncate the file referenced by FD to LENGTH bytes. */
int
__ftruncate64 (int fd, off64_t length)
{
/* On PPC32 64bit values are aligned in odd/even register pairs. */
int result = INLINE_SYSCALL (ftruncate64, 4, fd, 0,
(long) (length >> 32),
(long) length);
return result;
}
weak_alias (__ftruncate64, ftruncate64)

1
sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c
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@ -1 +0,0 @@
/* ftruncate64 is the same as ftruncate. */

1
sysdeps/unix/sysv/linux/wordsize-64/syscalls.list
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@ -3,7 +3,6 @@
fstatfs - fstatfs i:ip __fstatfs fstatfs fstatfs64 __fstatfs64
statfs - statfs i:sp __statfs statfs statfs64
mmap - mmap b:aniiii __mmap mmap __mmap64 mmap64
ftruncate - ftruncate i:ii __ftruncate ftruncate ftruncate64 __ftruncate64
truncate - truncate i:si truncate truncate64
getrlimit - getrlimit i:ip __getrlimit getrlimit getrlimit64 __getrlimit64
setrlimit - setrlimit i:ip __setrlimit setrlimit setrlimit64