1 /* $NetBSD: linux_fcntl.h,v 1.23 2024/09/28 19:35:56 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 #ifdef _KERNEL 36 #include <compat/linux/common/linux_types.h> /* For linux_off_t */ 37 struct stat; 38 #endif 39 40 /* 41 * The arguments in the flock structure have a different order from the 42 * BSD structure. 43 */ 44 45 /* read/write mode for open(2) */ 46 #define LINUX_O_RDONLY 0x0000 47 #define LINUX_O_WRONLY 0x0001 48 #define LINUX_O_RDWR 0x0002 49 #define LINUX_O_ACCMODE 0x0003 50 51 #define LINUX_AT_FDCWD -100 52 #define LINUX_AT_SYMLINK_NOFOLLOW 0x0100 53 #define LINUX_AT_REMOVEDIR 0x0200 54 #define LINUX_AT_SYMLINK_FOLLOW 0x0400 55 #define LINUX_AT_NO_AUTOMOUNT 0x0800 56 #define LINUX_AT_EMPTY_PATH 0x1000 57 58 59 /* 60 * sync_file_range flags 61 */ 62 #define LINUX_SYNC_FILE_RANGE_WAIT_BEFORE 1 63 #define LINUX_SYNC_FILE_RANGE_WRITE 2 64 #define LINUX_SYNC_FILE_RANGE_WAIT_AFTER 4 65 #define LINUX_SYNC_FILE_RANGE_ALL \ 66 (LINUX_SYNC_FILE_RANGE_WAIT_BEFORE | \ 67 LINUX_SYNC_FILE_RANGE_WRITE | \ 68 LINUX_SYNC_FILE_RANGE_WAIT_AFTER) 69 70 /* 71 * renameat2 flags 72 */ 73 #define LINUX_RENAME_NOREPLACE 1 74 #define LINUX_RENAME_EXCHANGE 2 75 #define LINUX_RENAME_WHITEOUT 4 76 #define LINUX_RENAME_ALL \ 77 (LINUX_RENAME_NOREPLACE | \ 78 LINUX_RENAME_EXCHANGE | \ 79 LINUX_RENAME_WHITEOUT) 80 81 #ifdef _KERNEL 82 int linux_to_bsd_ioflags(int); 83 int linux_to_bsd_atflags(int); 84 int bsd_to_linux_statx(struct stat *, struct linux_statx *, unsigned int); 85 int linux_statat(struct lwp *, int, const char *, int, struct stat *); 86 87 struct linux_flock { 88 short l_type; 89 short l_whence; 90 linux_off_t l_start; 91 linux_off_t l_len; 92 linux_pid_t l_pid; 93 }; 94 95 struct linux_flock64 { 96 short l_type; 97 short l_whence; 98 off_t l_start; 99 off_t l_len; 100 linux_pid_t l_pid; 101 }; 102 #endif /* _KERNEL */ 103 104 #if defined(__i386__) 105 #include <compat/linux/arch/i386/linux_fcntl.h> 106 #elif defined(__m68k__) 107 #include <compat/linux/arch/m68k/linux_fcntl.h> 108 #elif defined(__alpha__) 109 #include <compat/linux/arch/alpha/linux_fcntl.h> 110 #elif defined(__powerpc__) 111 #include <compat/linux/arch/powerpc/linux_fcntl.h> 112 #elif defined(__mips__) 113 #include <compat/linux/arch/mips/linux_fcntl.h> 114 #elif defined(__aarch64__) 115 #include <compat/linux/arch/aarch64/linux_fcntl.h> 116 #elif defined(__arm__) 117 #include <compat/linux/arch/arm/linux_fcntl.h> 118 #elif defined(__amd64__) 119 #include <compat/linux/arch/amd64/linux_fcntl.h> 120 #else 121 #error Undefined linux_fcntl.h machine type. 122 #endif 123 124 /* Linux specific fcntl(2) commands */ 125 #define LINUX_F_SPECIFIC_BASE 1024 126 #define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) 127 #define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) 128 #define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) 129 #define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) 130 #define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) 131 #define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) 132 #define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) 133 #define LINUX_F_ADD_SEALS (LINUX_F_SPECIFIC_BASE + 9) 134 #define LINUX_F_GET_SEALS (LINUX_F_SPECIFIC_BASE + 10) 135 136 #ifdef _KERNEL 137 /* 138 * We have to have 4 copies of the code that converts linux fcntl() file 139 * locking to native form because there are 4 layouts for the structures. 140 * To avoid replicating code, these defines are used. 141 * 142 * The next two functions take care of converting the flock 143 * structure back and forth between Linux and NetBSD format. 144 * The only difference in the structures is the order and size of 145 * the fields, and the 'whence' value. 146 */ 147 148 #define conv_linux_flock(LINUX, FLOCK) \ 149 static void \ 150 bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 151 copy_flock(lfp, LINUX_F, bfp, F) \ 152 \ 153 static void \ 154 LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 155 copy_flock(bfp, F, lfp, LINUX_F) 156 157 #define copy_flock(dst, dst_f, src, src_f) { \ 158 dst->l_start = src->l_start; \ 159 dst->l_len = src->l_len; \ 160 dst->l_pid = src->l_pid; \ 161 dst->l_whence = src->l_whence; \ 162 switch (src->l_type) { \ 163 case src_f##_RDLCK: \ 164 dst->l_type = dst_f##_RDLCK; \ 165 break; \ 166 case src_f##_UNLCK: \ 167 dst->l_type = dst_f##_UNLCK; \ 168 break; \ 169 case src_f##_WRLCK: \ 170 dst->l_type = dst_f##_WRLCK; \ 171 break; \ 172 default: \ 173 dst->l_type = -1; \ 174 break; \ 175 } \ 176 } 177 178 /* 179 * These two defines do the work within the sys_fcntl() switch statement. 180 */ 181 182 #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 183 struct LINUX##_##FLOCK lfl; \ 184 struct flock bfl; \ 185 int fl_error; \ 186 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 187 return fl_error; \ 188 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 189 fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ 190 if (fl_error) \ 191 return fl_error; \ 192 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 193 return copyout(&lfl, arg, sizeof lfl); \ 194 } while (0) 195 196 #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 197 struct LINUX##_##FLOCK lfl; \ 198 struct flock bfl; \ 199 int fl_error; \ 200 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 201 return fl_error; \ 202 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 203 return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 204 } while (0) 205 #endif /* _KERNEL */ 206 207 #endif /* !_LINUX_FCNTL_H */ 208