linux_fcntl.h revision 1.11.46.1
1 /* linux_fcntl.h,v 1.11 2005/12/11 12:20:19 christos 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _LINUX_FCNTL_H 40 #define _LINUX_FCNTL_H 41 42 /* 43 * The arguments in the flock structure have a different order from the 44 * BSD structure. 45 */ 46 47 /* read/write mode for open(2) */ 48 #define LINUX_O_RDONLY 0x0000 49 #define LINUX_O_WRONLY 0x0001 50 #define LINUX_O_RDWR 0x0002 51 #define LINUX_O_ACCMODE 0x0003 52 53 struct linux_flock { 54 short l_type; 55 short l_whence; 56 linux_off_t l_start; 57 linux_off_t l_len; 58 linux_pid_t l_pid; 59 }; 60 61 struct linux_flock64 { 62 short l_type; 63 short l_whence; 64 off_t l_start; 65 off_t l_len; 66 linux_pid_t l_pid; 67 }; 68 69 #if defined(__i386__) 70 #include <compat/linux/arch/i386/linux_fcntl.h> 71 #elif defined(__m68k__) 72 #include <compat/linux/arch/m68k/linux_fcntl.h> 73 #elif defined(__alpha__) 74 #include <compat/linux/arch/alpha/linux_fcntl.h> 75 #elif defined(__powerpc__) 76 #include <compat/linux/arch/powerpc/linux_fcntl.h> 77 #elif defined(__mips__) 78 #include <compat/linux/arch/mips/linux_fcntl.h> 79 #elif defined(__arm__) 80 #include <compat/linux/arch/arm/linux_fcntl.h> 81 #elif defined(__amd64__) 82 #include <compat/linux/arch/amd64/linux_fcntl.h> 83 #else 84 #error Undefined linux_fcntl.h machine type. 85 #endif 86 87 /* 88 * We have to have 4 copies of the code that converts linux fcntl() file 89 * locking to native form because there are 4 layouts for the structures. 90 * To avoid replicating code, these defines are used. 91 * 92 * The next two functions take care of converting the flock 93 * structure back and forth between Linux and NetBSD format. 94 * The only difference in the structures is the order and size of 95 * the fields, and the 'whence' value. 96 */ 97 98 #define conv_linux_flock(LINUX, FLOCK) \ 99 static void \ 100 bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 101 copy_flock(lfp, LINUX_F, bfp, F) \ 102 \ 103 static void \ 104 LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 105 copy_flock(bfp, F, lfp, LINUX_F) 106 107 #define copy_flock(dst, dst_f, src, src_f) { \ 108 dst->l_start = src->l_start; \ 109 dst->l_len = src->l_len; \ 110 dst->l_pid = src->l_pid; \ 111 dst->l_whence = src->l_whence; \ 112 switch (src->l_type) { \ 113 case src_f##_RDLCK: \ 114 dst->l_type = dst_f##_RDLCK; \ 115 break; \ 116 case src_f##_UNLCK: \ 117 dst->l_type = dst_f##_UNLCK; \ 118 break; \ 119 case src_f##_WRLCK: \ 120 dst->l_type = dst_f##_WRLCK; \ 121 break; \ 122 } \ 123 } 124 125 /* 126 * These two defines do the work within the sys_fcntl() switch statement. 127 */ 128 129 #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 130 struct LINUX##_##FLOCK lfl; \ 131 struct flock bfl; \ 132 int fl_error; \ 133 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 134 return fl_error; \ 135 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 136 fl_error = do_fcntl_lock(l, fd, F_GETLK, &bfl); \ 137 if (fl_error) \ 138 return fl_error; \ 139 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 140 return copyout(&lfl, arg, sizeof lfl); \ 141 } while (0) 142 143 #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 144 struct LINUX##_##FLOCK lfl; \ 145 struct flock bfl; \ 146 int fl_error; \ 147 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 148 return fl_error; \ 149 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 150 return do_fcntl_lock(l, fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 151 } while (0) 152 153 154 #endif /* !_LINUX_FCNTL_H */ 155
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