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Consolidate Linux truncate implementations

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This patch consolidates all Linux truncate implementation on
sysdeps/unix/sysv/linux/truncate{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.

	* sysdeps/unix/sysv/linux/arm/truncate64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c: Likewise.
	* sysdeps/sysv/linux/generic/wordsize-32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/truncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/truncate.c: New file.
	* sysdeps/unix/sysv/linux/truncate64.c (truncate64): Use
	INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (truncate):
	Remove.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (truncate):
	Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
This commit is contained in:
Adhemerval Zanella 2016-08-26 12:19:18 -03:00
parent 87686aeefd
commit d4d8a12960
11 changed files with 40 additions and 159 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
ChangeLog
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@ -1,5 +1,20 @@
2016-11-09 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/arm/truncate64.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c: Likewise.
* sysdeps/sysv/linux/generic/wordsize-32/truncate64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/truncate64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/truncate64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/truncate64.c: Likewise.
* sysdeps/unix/sysv/linux/truncate.c: New file.
* sysdeps/unix/sysv/linux/truncate64.c (truncate64): Use
INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (truncate):
Remove.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (truncate):
Likewise.
* 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.

35
sysdeps/unix/sysv/linux/arm/truncate64.c
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@ -1,35 +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 <endian.h>
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
truncate64 (const char *path, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (truncate64, 4, path, 0,
__LONG_LONG_PAIR (high, low));
return result;
}

31
sysdeps/unix/sysv/linux/generic/wordsize-32/truncate64.c
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@ -1,31 +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 PATH to LENGTH bytes. */
int
truncate64 (const char *path, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
return INLINE_SYSCALL (truncate64, __ALIGNMENT_COUNT (3, 4), path,
__ALIGNMENT_ARG __LONG_LONG_PAIR (high, low));
}

35
sysdeps/unix/sysv/linux/mips/mips32/truncate64.c
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@ -1,35 +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 <endian.h>
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
truncate64 (const char *path, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (truncate64, 4, path, 0,
__LONG_LONG_PAIR (high, low));
return result;
}

2
sysdeps/unix/sysv/linux/mips/mips64/syscalls.list
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@ -1,7 +1,5 @@
# File name Caller Syscall name Args Strong name Weak names
truncate - truncate i:si truncate truncate64
# Semaphore and shm system calls. msgctl, shmctl, and semctl have C
# wrappers (to set __IPC_64).
msgget - msgget i:ii __msgget msgget

1
sysdeps/unix/sysv/linux/mips/mips64/truncate64.c
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@ -1 +0,0 @@
/* Empty. */

34
sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c
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@ -1,34 +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
truncate64 (const char *path, off64_t length)
{
/* On PPC32 64bit values are aligned in odd/even register pairs. */
int result = INLINE_SYSCALL (truncate64, 4, path, 0,
(long) (length >> 32),
(long) length);
return result;
}

18
sysdeps/unix/sysv/linux/generic/wordsize-32/truncate.c → sysdeps/unix/sysv/linux/truncate.c
View File

@ -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>
#ifndef __OFF_T_MATCHES_OFF64_T
/* Truncate PATH to LENGTH bytes. */
int
__truncate (const char *path, off_t length)
{
return INLINE_SYSCALL (truncate64, __ALIGNMENT_COUNT (3, 4), path,
__ALIGNMENT_ARG
__LONG_LONG_PAIR (length >> 31, length));
# ifndef __NR_truncate
return INLINE_SYSCALL_CALL (truncate64, path,
__ALIGNMENT_ARG SYSCALL_LL (length));
# else
return INLINE_SYSCALL_CALL (truncate, path, length);
# endif
}
weak_alias (__truncate, truncate)
#endif

26
sysdeps/unix/sysv/linux/truncate64.c
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@ -15,21 +15,23 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <endian.h>
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <errno.h>
/* Truncate the file referenced by FD to LENGTH bytes. */
#ifndef __NR_truncate64
# define __NR_truncate64 __NR_truncate
#endif
/* Truncate PATH to LENGTH bytes. */
int
truncate64 (const char *path, off64_t length)
__truncate64 (const char *path, off64_t length)
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (truncate64, 3, path,
__LONG_LONG_PAIR (high, low));
return result;
return INLINE_SYSCALL_CALL (truncate64, path,
__ALIGNMENT_ARG SYSCALL_LL64 (length));
}
weak_alias (__truncate64, truncate64)
#ifdef __OFF_T_MATCHES_OFF64_T
weak_alias (__truncate64, truncate);
#endif

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
truncate - truncate i:si truncate truncate64
getrlimit - getrlimit i:ip __getrlimit getrlimit getrlimit64 __getrlimit64
setrlimit - setrlimit i:ip __setrlimit setrlimit setrlimit64
readahead - readahead i:iii __readahead readahead

1
sysdeps/unix/sysv/linux/wordsize-64/truncate64.c
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@ -1 +0,0 @@
/* truncate64 is the same as truncate. */