FreeBSD/Linux Kernel Cross Reference
sys/compat/linux32/common/linux32_fcntl.c

     /*      $NetBSD: linux32_fcntl.c,v 1.6 2008/02/04 22:23:43 dsl Exp $ */
     
     /*-
      * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Emmanuel Dreyfus
     * 4. The name of the author may not be used to endorse or promote 
     *    products derived from this software without specific prior written 
     *    permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 
     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    
    __KERNEL_RCSID(0, "$NetBSD: linux32_fcntl.c,v 1.6 2008/02/04 22:23:43 dsl Exp $");
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/signal.h>
    #include <sys/fcntl.h>
    #include <sys/filedesc.h>
    
    #include <machine/types.h>
    
    #include <sys/syscallargs.h>
    
    #include <compat/netbsd32/netbsd32.h>
    #include <compat/netbsd32/netbsd32_syscallargs.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_fcntl.h>
    #include <compat/linux/common/linux_machdep.h>
    #include <compat/linux/common/linux_misc.h>
    #include <compat/linux/linux_syscallargs.h>
    
    #include <compat/linux32/common/linux32_types.h>
    #include <compat/linux32/common/linux32_signal.h>
    #include <compat/linux32/common/linux32_machdep.h>
    #include <compat/linux32/linux32_syscallargs.h>
    
    struct linux32_flock {
            short       l_type;
            short       l_whence;
            int32_t     l_start;
            int32_t     l_len;
            linux_pid_t l_pid;
    };
    
    struct linux32_flock64 {
            short           l_type;
            short           l_whence;
            netbsd32_int64  l_start;
            netbsd32_int64  l_len;
            linux_pid_t     l_pid;
    };
    
    conv_linux_flock(linux32, flock)
    conv_linux_flock(linux32, flock64)
    
    int
    linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(const netbsd32_charp) path;
                    syscallarg(int) flags;
                    syscallarg(int) mode;
            } */
            struct linux_sys_open_args ua;
    
            NETBSD32TOP_UAP(path, const char);
            NETBSD32TO64_UAP(flags);
            NETBSD32TO64_UAP(mode);
    
            return linux_sys_open(l, &ua, retval);
    }
    
    /*
     * The linux support for 64bit file offsets introduced both an fcntl64()
    * function and LINUX_F_SETLK64 (et al), however the fcntl64() function
    * can still be passed LINUX_F_GETLK (etc).
    * In practice this means that the two functions are identical!
    *
    * We have to intercept both sets of locking primitives because the
    * structure layout of the 64bit version differs from that on amd64 due
    * to extra padding because the alignment constraint for int64_t differs.
    */
   
   int
   linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval)
   {
           /* {
                   syscallcarg(int) fd;
                   syscallarg(int) cmd;
                   syscallarg(netbsd32_voidp) arg;
           } */
           struct linux_sys_fcntl_args ua;
           int cmd =  SCARG(uap, cmd);
   
           switch (cmd) {
           case LINUX_F_GETLK64:
                   do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
                       linux32, flock64);
           case LINUX_F_SETLK64:
           case LINUX_F_SETLKW64:
                   do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
                       linux32, flock64, LINUX_F_SETLK64);
           case LINUX_F_GETLK:
                   do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
                       linux32, flock);
           case LINUX_F_SETLK:
           case LINUX_F_SETLKW:
                   do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
                       linux32, flock, LINUX_F_SETLK);
           default:
                   break;
           }
   
           NETBSD32TO64_UAP(fd);
           SCARG(&ua, cmd) = cmd;
           NETBSD32TOP_UAP(arg, void);
   
           return linux_sys_fcntl(l, &ua, retval);
   }

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