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123 lines
3.8 KiB
Diff
123 lines
3.8 KiB
Diff
2009-07-25 Aurelien Jarno <aurelien@aurel32.net>
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* sysdeps/unix/sysv/linux/kernel-features.h: define
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__ASSUME_FDATASYNC.
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* sysdeps/unix/sysv/linux/fdatasync.c: New file.
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* sysdeps/unix/sysv/linux/Makefile: compile fdatasync.c with
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-fexceptions.
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* sysdeps/unix/sysv/linux/syscalls.list: Remove fdatasync.
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sysdeps/unix/sysv/linux/Makefile | 1
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sysdeps/unix/sysv/linux/fdatasync.c | 69 ++++++++++++++++++++++++++++++
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sysdeps/unix/sysv/linux/kernel-features.h | 6 ++
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sysdeps/unix/sysv/linux/syscalls.list | 1
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4 files changed, 76 insertions(+), 1 deletion(-)
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--- a/sysdeps/unix/sysv/linux/Makefile
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+++ b/sysdeps/unix/sysv/linux/Makefile
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@@ -20,6 +20,7 @@
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setfsuid setfsgid makedev epoll_pwait signalfd \
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eventfd eventfd_read eventfd_write prlimit
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+CFLAGS-fdatasync.c = -fexceptions
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CFLAGS-gethostid.c = -fexceptions
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sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/fdatasync.c
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@@ -0,0 +1,69 @@
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+/* fdatasync -- synchronize at least the data part of a file with
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+ the underlying media. Linux version.
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+
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+ Copyright (C) 2007 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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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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+
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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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+
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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, write to the Free
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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+ 02111-1307 USA. */
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+
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+#include <errno.h>
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+#include <unistd.h>
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+
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+#include <sysdep-cancel.h>
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+#include <sys/syscall.h>
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+#include <bp-checks.h>
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+
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+#include <kernel-features.h>
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+
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+#if defined __NR_fdatasync && !defined __ASSUME_FDATASYNC
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+static int __have_no_fdatasync;
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+#endif
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+
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+static int
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+do_fdatasync (int fd)
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+{
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+#ifdef __ASSUME_FDATASYNC
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+ return INLINE_SYSCALL (fdatasync, 1, fd);
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+#elif defined __NR_fdatasync
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+ if (!__builtin_expect (__have_no_fdatasync, 0))
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+ {
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+ int result = INLINE_SYSCALL (fdatasync, 1, fd);
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+ if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)
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+ return result;
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+
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+ __have_no_fdatasync = 1;
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+ }
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+#endif
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+ return INLINE_SYSCALL (fsync, 1, fd);
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+}
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+
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+int
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+__fdatasync (int fd)
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+{
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+ if (SINGLE_THREAD_P)
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+ return do_fdatasync (fd);
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+
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+ int oldtype = LIBC_CANCEL_ASYNC ();
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+
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+ int result = do_fdatasync (fd);
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+
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+ LIBC_CANCEL_RESET (oldtype);
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+
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+ return result;
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+}
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+
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+weak_alias (__fdatasync, fdatasync)
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+
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--- a/sysdeps/unix/sysv/linux/kernel-features.h
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+++ b/sysdeps/unix/sysv/linux/kernel-features.h
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@@ -459,6 +459,12 @@
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# define __ASSUME_FUTEX_LOCK_PI 1
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#endif
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+/* Support for fsyncdata syscall was added in 2.6.22 on alpha, but it
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+ was already present in 2.0 kernels on other architectures. */
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+#if (!defined __alpha || __LINUX_KERNEL_VERSION >= 0x020616)
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+# define __ASSUME_FDATASYNC 1
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+#endif
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+
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/* Support for utimensat syscall was added in 2.6.22, on SH
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only after 2.6.22-rc1. */
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#if __LINUX_KERNEL_VERSION >= 0x020616 \
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--- a/sysdeps/unix/sysv/linux/syscalls.list
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+++ b/sysdeps/unix/sysv/linux/syscalls.list
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@@ -11,7 +11,6 @@
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epoll_create1 EXTRA epoll_create1 i:i epoll_create1
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epoll_ctl EXTRA epoll_ctl i:iiip epoll_ctl
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epoll_wait EXTRA epoll_wait Ci:ipii epoll_wait
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-fdatasync - fdatasync Ci:i fdatasync
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flock - flock i:ii __flock flock
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fork - fork i: __libc_fork __fork fork
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get_kernel_syms EXTRA get_kernel_syms i:p get_kernel_syms
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