linux_fcntl.h revision 1.14.50.1
1 /* $NetBSD: linux_fcntl.h,v 1.14.50.1 2014/05/18 17:45:32 rmind 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 #define LINUX_AT_FDCWD -100 47 #define LINUX_AT_SYMLINK_NOFOLLOW 0x0100 48 #define LINUX_AT_REMOVEDIR 0x0200 49 #define LINUX_AT_SYMLINK_FOLLOW 0x0400 50 #define LINUX_AT_NO_AUTOMOUNT 0x0800 51 #define LINUX_AT_EMPTY_PATH 0x1000 52 53 int linux_to_bsd_atflags(int); 54 55 struct linux_flock { 56 short l_type; 57 short l_whence; 58 linux_off_t l_start; 59 linux_off_t l_len; 60 linux_pid_t l_pid; 61 }; 62 63 struct linux_flock64 { 64 short l_type; 65 short l_whence; 66 off_t l_start; 67 off_t l_len; 68 linux_pid_t l_pid; 69 }; 70 71 #if defined(__i386__) 72 #include <compat/linux/arch/i386/linux_fcntl.h> 73 #elif defined(__m68k__) 74 #include <compat/linux/arch/m68k/linux_fcntl.h> 75 #elif defined(__alpha__) 76 #include <compat/linux/arch/alpha/linux_fcntl.h> 77 #elif defined(__powerpc__) 78 #include <compat/linux/arch/powerpc/linux_fcntl.h> 79 #elif defined(__mips__) 80 #include <compat/linux/arch/mips/linux_fcntl.h> 81 #elif defined(__arm__) 82 #include <compat/linux/arch/arm/linux_fcntl.h> 83 #elif defined(__amd64__) 84 #include <compat/linux/arch/amd64/linux_fcntl.h> 85 #else 86 #error Undefined linux_fcntl.h machine type. 87 #endif 88 89 /* 90 * We have to have 4 copies of the code that converts linux fcntl() file 91 * locking to native form because there are 4 layouts for the structures. 92 * To avoid replicating code, these defines are used. 93 * 94 * The next two functions take care of converting the flock 95 * structure back and forth between Linux and NetBSD format. 96 * The only difference in the structures is the order and size of 97 * the fields, and the 'whence' value. 98 */ 99 100 #define conv_linux_flock(LINUX, FLOCK) \ 101 static void \ 102 bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 103 copy_flock(lfp, LINUX_F, bfp, F) \ 104 \ 105 static void \ 106 LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 107 copy_flock(bfp, F, lfp, LINUX_F) 108 109 #define copy_flock(dst, dst_f, src, src_f) { \ 110 dst->l_start = src->l_start; \ 111 dst->l_len = src->l_len; \ 112 dst->l_pid = src->l_pid; \ 113 dst->l_whence = src->l_whence; \ 114 switch (src->l_type) { \ 115 case src_f##_RDLCK: \ 116 dst->l_type = dst_f##_RDLCK; \ 117 break; \ 118 case src_f##_UNLCK: \ 119 dst->l_type = dst_f##_UNLCK; \ 120 break; \ 121 case src_f##_WRLCK: \ 122 dst->l_type = dst_f##_WRLCK; \ 123 break; \ 124 } \ 125 } 126 127 /* 128 * These two defines do the work within the sys_fcntl() switch statement. 129 */ 130 131 #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 132 struct LINUX##_##FLOCK lfl; \ 133 struct flock bfl; \ 134 int fl_error; \ 135 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 136 return fl_error; \ 137 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 138 fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ 139 if (fl_error) \ 140 return fl_error; \ 141 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 142 return copyout(&lfl, arg, sizeof lfl); \ 143 } while (0) 144 145 #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 146 struct LINUX##_##FLOCK lfl; \ 147 struct flock bfl; \ 148 int fl_error; \ 149 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 150 return fl_error; \ 151 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 152 return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 153 } while (0) 154 155 156 #endif /* !_LINUX_FCNTL_H */ 157
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