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Really implement fallocate{,64} and sync_file_range as cancellation points.

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This commit is contained in:
Ulrich Drepper
2011-04-01 11:15:08 -04:00
parent 6e63d5e1ae
commit 748876bf1c
9 changed files with 130 additions and 33 deletions
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43
sysdeps/unix/sysv/linux/sync_file_range.c
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@ -1,5 +1,5 @@
/* Selective file content synch'ing.
Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc.
Copyright (C) 2006, 2007, 2009, 2011 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
@ -21,7 +21,7 @@
#include <fcntl.h>
#include <sys/types.h>
#include <sysdep.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
@ -29,18 +29,43 @@
int
sync_file_range (int fd, __off64_t from, __off64_t to, unsigned int flags)
{
return INLINE_SYSCALL (sync_file_range, 6, fd,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to),
flags);
if (SINGLE_THREAD_P)
return INLINE_SYSCALL (sync_file_range, 6, fd,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to),
flags);
int result;
int oldtype = LIBC_CANCEL_ASYNC ();
result = INLINE_SYSCALL (sync_file_range, 6, fd,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to),
flags);
LIBC_CANCEL_RESET (oldtype);
return result;
}
#elif defined __NR_sync_file_range2
int
sync_file_range (int fd, __off64_t from, __off64_t to, unsigned int flags)
{
return INLINE_SYSCALL (sync_file_range2, 6, fd, flags,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to));
if (SINGLE_THREAD_P)
return INLINE_SYSCALL (sync_file_range2, 6, fd, flags,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to));
int result;
int oldtype = LIBC_CANCEL_ASYNC ();
result = INLINE_SYSCALL (sync_file_range2, 6, fd, flags,
__LONG_LONG_PAIR ((long) (from >> 32), (long) from),
__LONG_LONG_PAIR ((long) (to >> 32), (long) to));
LIBC_CANCEL_RESET (oldtype);
return result;
}
#else
int