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linux_fadvise64.c revision 1.1 
      1 /*	$NetBSD: linux_fadvise64.c,v 1.1 2011/05/30 17:50:32 alnsn Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: linux_fadvise64.c,v 1.1 2011/05/30 17:50:32 alnsn Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/types.h>
     34 #include <sys/systm.h>
     35 #include <sys/namei.h>
     36 #include <sys/proc.h>
     37 #include <sys/file.h>
     38 #include <sys/fcntl.h>
     39 #include <sys/stat.h>
     40 #include <sys/filedesc.h>
     41 #include <sys/ioctl.h>
     42 #include <sys/kernel.h>
     43 #include <sys/mount.h>
     44 #include <sys/malloc.h>
     45 #include <sys/namei.h>
     46 #include <sys/vnode.h>
     47 #include <sys/tty.h>
     48 #include <sys/socketvar.h>
     49 #include <sys/conf.h>
     50 #include <sys/pipe.h>
     51 
     52 #include <machine/limits.h>
     53 
     54 #include <sys/syscall.h>
     55 #include <sys/syscallargs.h>
     56 
     57 #include <compat/linux/common/linux_types.h>
     58 #include <compat/linux/common/linux_machdep.h>
     59 #include <compat/linux/common/linux_misc.h>
     60 
     61 #include <compat/linux/linux_syscallargs.h>
     62 
     63 
     64 int
     65 linux_sys_fadvise64(struct lwp *l,
     66     const struct linux_sys_fadvise64_args *uap, register_t *retval)
     67 {
     68 	/* {
     69 		syscallarg(int) fd;
     70 		syscallarg(linux_off_t) offset;
     71 		syscallarg(size_t) len;
     72 		syscallarg(int) advice;
     73 	} */
     74 
     75 	size_t len = SCARG(uap, len);
     76 
     77 	if (sizeof(len) == sizeof(linux_off_t) && len > SSIZE_MAX)
     78 		return (EINVAL);
     79 
     80 	return do_posix_fadvise(SCARG(uap, fd),
     81 	    SCARG(uap, offset), len, linux_to_bsd_posix_fadv(SCARG(uap, advice)));
     82 }
     83