| 1 | /* $NetBSD: linux_fcntl.h,v 1.17 2015/03/01 13:19:39 njoly 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_ioflags(int); |
| 54 | int linux_to_bsd_atflags(int); |
| 55 | |
| 56 | struct linux_flock { |
| 57 | short l_type; |
| 58 | short l_whence; |
| 59 | linux_off_t l_start; |
| 60 | linux_off_t l_len; |
| 61 | linux_pid_t l_pid; |
| 62 | }; |
| 63 | |
| 64 | struct linux_flock64 { |
| 65 | short l_type; |
| 66 | short l_whence; |
| 67 | off_t l_start; |
| 68 | off_t l_len; |
| 69 | linux_pid_t l_pid; |
| 70 | }; |
| 71 | |
| 72 | #if defined(__i386__) |
| 73 | #include <compat/linux/arch/i386/linux_fcntl.h> |
| 74 | #elif defined(__m68k__) |
| 75 | #include <compat/linux/arch/m68k/linux_fcntl.h> |
| 76 | #elif defined(__alpha__) |
| 77 | #include <compat/linux/arch/alpha/linux_fcntl.h> |
| 78 | #elif defined(__powerpc__) |
| 79 | #include <compat/linux/arch/powerpc/linux_fcntl.h> |
| 80 | #elif defined(__mips__) |
| 81 | #include <compat/linux/arch/mips/linux_fcntl.h> |
| 82 | #elif defined(__arm__) |
| 83 | #include <compat/linux/arch/arm/linux_fcntl.h> |
| 84 | #elif defined(__amd64__) |
| 85 | #include <compat/linux/arch/amd64/linux_fcntl.h> |
| 86 | #else |
| 87 | #error Undefined linux_fcntl.h machine type. |
| 88 | #endif |
| 89 | |
| 90 | /* Linux specific fcntl(2) commands */ |
| 91 | #define LINUX_F_SPECIFIC_BASE 1024 |
| 92 | #define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) |
| 93 | #define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) |
| 94 | #define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) |
| 95 | #define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) |
| 96 | #define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) |
| 97 | #define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) |
| 98 | #define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) |
| 99 | |
| 100 | /* |
| 101 | * We have to have 4 copies of the code that converts linux fcntl() file |
| 102 | * locking to native form because there are 4 layouts for the structures. |
| 103 | * To avoid replicating code, these defines are used. |
| 104 | * |
| 105 | * The next two functions take care of converting the flock |
| 106 | * structure back and forth between Linux and NetBSD format. |
| 107 | * The only difference in the structures is the order and size of |
| 108 | * the fields, and the 'whence' value. |
| 109 | */ |
| 110 | |
| 111 | #define conv_linux_flock(LINUX, FLOCK) \ |
| 112 | static void \ |
| 113 | bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ |
| 114 | copy_flock(lfp, LINUX_F, bfp, F) \ |
| 115 | \ |
| 116 | static void \ |
| 117 | LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ |
| 118 | copy_flock(bfp, F, lfp, LINUX_F) |
| 119 | |
| 120 | #define copy_flock(dst, dst_f, src, src_f) { \ |
| 121 | dst->l_start = src->l_start; \ |
| 122 | dst->l_len = src->l_len; \ |
| 123 | dst->l_pid = src->l_pid; \ |
| 124 | dst->l_whence = src->l_whence; \ |
| 125 | switch (src->l_type) { \ |
| 126 | case src_f##_RDLCK: \ |
| 127 | dst->l_type = dst_f##_RDLCK; \ |
| 128 | break; \ |
| 129 | case src_f##_UNLCK: \ |
| 130 | dst->l_type = dst_f##_UNLCK; \ |
| 131 | break; \ |
| 132 | case src_f##_WRLCK: \ |
| 133 | dst->l_type = dst_f##_WRLCK; \ |
| 134 | break; \ |
| 135 | } \ |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * These two defines do the work within the sys_fcntl() switch statement. |
| 140 | */ |
| 141 | |
| 142 | #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ |
| 143 | struct LINUX##_##FLOCK lfl; \ |
| 144 | struct flock bfl; \ |
| 145 | int fl_error; \ |
| 146 | if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ |
| 147 | return fl_error; \ |
| 148 | LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ |
| 149 | fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ |
| 150 | if (fl_error) \ |
| 151 | return fl_error; \ |
| 152 | bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ |
| 153 | return copyout(&lfl, arg, sizeof lfl); \ |
| 154 | } while (0) |
| 155 | |
| 156 | #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ |
| 157 | struct LINUX##_##FLOCK lfl; \ |
| 158 | struct flock bfl; \ |
| 159 | int fl_error; \ |
| 160 | if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ |
| 161 | return fl_error; \ |
| 162 | LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ |
| 163 | return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ |
| 164 | } while (0) |
| 165 | |
| 166 | |
| 167 | #endif /* !_LINUX_FCNTL_H */ |
| 168 | |