1 /* $NetBSD: linux_fcntl.h,v 1.21 2023/07/10 02:31:55 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 * 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 int bsd_to_linux_statx(struct stat *, struct linux_statx *, unsigned int); 56 int linux_statat(struct lwp *, int, const char *, int, struct stat *); 57 58 struct linux_flock { 59 short l_type; 60 short l_whence; 61 linux_off_t l_start; 62 linux_off_t l_len; 63 linux_pid_t l_pid; 64 }; 65 66 struct linux_flock64 { 67 short l_type; 68 short l_whence; 69 off_t l_start; 70 off_t l_len; 71 linux_pid_t l_pid; 72 }; 73 74 #if defined(__i386__) 75 #include <compat/linux/arch/i386/linux_fcntl.h> 76 #elif defined(__m68k__) 77 #include <compat/linux/arch/m68k/linux_fcntl.h> 78 #elif defined(__alpha__) 79 #include <compat/linux/arch/alpha/linux_fcntl.h> 80 #elif defined(__powerpc__) 81 #include <compat/linux/arch/powerpc/linux_fcntl.h> 82 #elif defined(__mips__) 83 #include <compat/linux/arch/mips/linux_fcntl.h> 84 #elif defined(__aarch64__) 85 #include <compat/linux/arch/aarch64/linux_fcntl.h> 86 #elif defined(__arm__) 87 #include <compat/linux/arch/arm/linux_fcntl.h> 88 #elif defined(__amd64__) 89 #include <compat/linux/arch/amd64/linux_fcntl.h> 90 #else 91 #error Undefined linux_fcntl.h machine type. 92 #endif 93 94 /* Linux specific fcntl(2) commands */ 95 #define LINUX_F_SPECIFIC_BASE 1024 96 #define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) 97 #define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) 98 #define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) 99 #define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) 100 #define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) 101 #define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) 102 #define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) 103 #define LINUX_F_ADD_SEALS (LINUX_F_SPECIFIC_BASE + 9) 104 #define LINUX_F_GET_SEALS (LINUX_F_SPECIFIC_BASE + 10) 105 106 /* 107 * We have to have 4 copies of the code that converts linux fcntl() file 108 * locking to native form because there are 4 layouts for the structures. 109 * To avoid replicating code, these defines are used. 110 * 111 * The next two functions take care of converting the flock 112 * structure back and forth between Linux and NetBSD format. 113 * The only difference in the structures is the order and size of 114 * the fields, and the 'whence' value. 115 */ 116 117 #define conv_linux_flock(LINUX, FLOCK) \ 118 static void \ 119 bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 120 copy_flock(lfp, LINUX_F, bfp, F) \ 121 \ 122 static void \ 123 LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 124 copy_flock(bfp, F, lfp, LINUX_F) 125 126 #define copy_flock(dst, dst_f, src, src_f) { \ 127 dst->l_start = src->l_start; \ 128 dst->l_len = src->l_len; \ 129 dst->l_pid = src->l_pid; \ 130 dst->l_whence = src->l_whence; \ 131 switch (src->l_type) { \ 132 case src_f##_RDLCK: \ 133 dst->l_type = dst_f##_RDLCK; \ 134 break; \ 135 case src_f##_UNLCK: \ 136 dst->l_type = dst_f##_UNLCK; \ 137 break; \ 138 case src_f##_WRLCK: \ 139 dst->l_type = dst_f##_WRLCK; \ 140 break; \ 141 default: \ 142 dst->l_type = -1; \ 143 break; \ 144 } \ 145 } 146 147 /* 148 * These two defines do the work within the sys_fcntl() switch statement. 149 */ 150 151 #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 152 struct LINUX##_##FLOCK lfl; \ 153 struct flock bfl; \ 154 int fl_error; \ 155 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 156 return fl_error; \ 157 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 158 fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ 159 if (fl_error) \ 160 return fl_error; \ 161 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 162 return copyout(&lfl, arg, sizeof lfl); \ 163 } while (0) 164 165 #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 166 struct LINUX##_##FLOCK lfl; \ 167 struct flock bfl; \ 168 int fl_error; \ 169 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 170 return fl_error; \ 171 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 172 return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 173 } while (0) 174 175 176 #endif /* !_LINUX_FCNTL_H */ 177