1 /* $NetBSD: linux_fcntl.h,v 1.14 2008/04/28 20:23:43 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_FCNTL_H 33 #define _LINUX_FCNTL_H 34 35 /* 36 * The arguments in the flock structure have a different order from the 37 * BSD structure. 38 */ 39 40 /* read/write mode for open(2) */ 41 #define LINUX_O_RDONLY 0x0000 42 #define LINUX_O_WRONLY 0x0001 43 #define LINUX_O_RDWR 0x0002 44 #define LINUX_O_ACCMODE 0x0003 45 46 struct linux_flock { 47 short l_type; 48 short l_whence; 49 linux_off_t l_start; 50 linux_off_t l_len; 51 linux_pid_t l_pid; 52 }; 53 54 struct linux_flock64 { 55 short l_type; 56 short l_whence; 57 off_t l_start; 58 off_t l_len; 59 linux_pid_t l_pid; 60 }; 61 62 #if defined(__i386__) 63 #include <compat/linux/arch/i386/linux_fcntl.h> 64 #elif defined(__m68k__) 65 #include <compat/linux/arch/m68k/linux_fcntl.h> 66 #elif defined(__alpha__) 67 #include <compat/linux/arch/alpha/linux_fcntl.h> 68 #elif defined(__powerpc__) 69 #include <compat/linux/arch/powerpc/linux_fcntl.h> 70 #elif defined(__mips__) 71 #include <compat/linux/arch/mips/linux_fcntl.h> 72 #elif defined(__arm__) 73 #include <compat/linux/arch/arm/linux_fcntl.h> 74 #elif defined(__amd64__) 75 #include <compat/linux/arch/amd64/linux_fcntl.h> 76 #else 77 #error Undefined linux_fcntl.h machine type. 78 #endif 79 80 /* 81 * We have to have 4 copies of the code that converts linux fcntl() file 82 * locking to native form because there are 4 layouts for the structures. 83 * To avoid replicating code, these defines are used. 84 * 85 * The next two functions take care of converting the flock 86 * structure back and forth between Linux and NetBSD format. 87 * The only difference in the structures is the order and size of 88 * the fields, and the 'whence' value. 89 */ 90 91 #define conv_linux_flock(LINUX, FLOCK) \ 92 static void \ 93 bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 94 copy_flock(lfp, LINUX_F, bfp, F) \ 95 \ 96 static void \ 97 LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 98 copy_flock(bfp, F, lfp, LINUX_F) 99 100 #define copy_flock(dst, dst_f, src, src_f) { \ 101 dst->l_start = src->l_start; \ 102 dst->l_len = src->l_len; \ 103 dst->l_pid = src->l_pid; \ 104 dst->l_whence = src->l_whence; \ 105 switch (src->l_type) { \ 106 case src_f##_RDLCK: \ 107 dst->l_type = dst_f##_RDLCK; \ 108 break; \ 109 case src_f##_UNLCK: \ 110 dst->l_type = dst_f##_UNLCK; \ 111 break; \ 112 case src_f##_WRLCK: \ 113 dst->l_type = dst_f##_WRLCK; \ 114 break; \ 115 } \ 116 } 117 118 /* 119 * These two defines do the work within the sys_fcntl() switch statement. 120 */ 121 122 #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 123 struct LINUX##_##FLOCK lfl; \ 124 struct flock bfl; \ 125 int fl_error; \ 126 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 127 return fl_error; \ 128 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 129 fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ 130 if (fl_error) \ 131 return fl_error; \ 132 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 133 return copyout(&lfl, arg, sizeof lfl); \ 134 } while (0) 135 136 #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 137 struct LINUX##_##FLOCK lfl; \ 138 struct flock bfl; \ 139 int fl_error; \ 140 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 141 return fl_error; \ 142 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 143 return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 144 } while (0) 145 146 147 #endif /* !_LINUX_FCNTL_H */ 148