1/* $NetBSD: linux_fcntl.h,v 1.22 2023/08/19 17:57:54 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 */ 37struct 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#ifdef _KERNEL 59int linux_to_bsd_ioflags(int); 60int linux_to_bsd_atflags(int); 61int bsd_to_linux_statx(struct stat *, struct linux_statx *, unsigned int); 62int linux_statat(struct lwp *, int, const char *, int, struct stat *); 63 64struct linux_flock { 65 short l_type; 66 short l_whence; 67 linux_off_t l_start; 68 linux_off_t l_len; 69 linux_pid_t l_pid; 70}; 71 72struct linux_flock64 { 73 short l_type; 74 short l_whence; 75 off_t l_start; 76 off_t l_len; 77 linux_pid_t l_pid; 78}; 79#endif /* _KERNEL */ 80 81#if defined(__i386__) 82#include <compat/linux/arch/i386/linux_fcntl.h> 83#elif defined(__m68k__) 84#include <compat/linux/arch/m68k/linux_fcntl.h> 85#elif defined(__alpha__) 86#include <compat/linux/arch/alpha/linux_fcntl.h> 87#elif defined(__powerpc__) 88#include <compat/linux/arch/powerpc/linux_fcntl.h> 89#elif defined(__mips__) 90#include <compat/linux/arch/mips/linux_fcntl.h> 91#elif defined(__aarch64__) 92#include <compat/linux/arch/aarch64/linux_fcntl.h> 93#elif defined(__arm__) 94#include <compat/linux/arch/arm/linux_fcntl.h> 95#elif defined(__amd64__) 96#include <compat/linux/arch/amd64/linux_fcntl.h> 97#else 98#error Undefined linux_fcntl.h machine type. 99#endif 100 101/* Linux specific fcntl(2) commands */ 102#define LINUX_F_SPECIFIC_BASE 1024 103#define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) 104#define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) 105#define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) 106#define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) 107#define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) 108#define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) 109#define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) 110#define LINUX_F_ADD_SEALS (LINUX_F_SPECIFIC_BASE + 9) 111#define LINUX_F_GET_SEALS (LINUX_F_SPECIFIC_BASE + 10) 112 113#ifdef _KERNEL 114/* 115 * We have to have 4 copies of the code that converts linux fcntl() file 116 * locking to native form because there are 4 layouts for the structures. 117 * To avoid replicating code, these defines are used. 118 * 119 * The next two functions take care of converting the flock 120 * structure back and forth between Linux and NetBSD format. 121 * The only difference in the structures is the order and size of 122 * the fields, and the 'whence' value. 123 */ 124 125#define conv_linux_flock(LINUX, FLOCK) \ 126static void \ 127bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ 128 copy_flock(lfp, LINUX_F, bfp, F) \ 129\ 130static void \ 131LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ 132 copy_flock(bfp, F, lfp, LINUX_F) 133 134#define copy_flock(dst, dst_f, src, src_f) { \ 135 dst->l_start = src->l_start; \ 136 dst->l_len = src->l_len; \ 137 dst->l_pid = src->l_pid; \ 138 dst->l_whence = src->l_whence; \ 139 switch (src->l_type) { \ 140 case src_f##_RDLCK: \ 141 dst->l_type = dst_f##_RDLCK; \ 142 break; \ 143 case src_f##_UNLCK: \ 144 dst->l_type = dst_f##_UNLCK; \ 145 break; \ 146 case src_f##_WRLCK: \ 147 dst->l_type = dst_f##_WRLCK; \ 148 break; \ 149 default: \ 150 dst->l_type = -1; \ 151 break; \ 152 } \ 153 } 154 155/* 156 * These two defines do the work within the sys_fcntl() switch statement. 157 */ 158 159#define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ 160 struct LINUX##_##FLOCK lfl; \ 161 struct flock bfl; \ 162 int fl_error; \ 163 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 164 return fl_error; \ 165 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 166 fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ 167 if (fl_error) \ 168 return fl_error; \ 169 bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ 170 return copyout(&lfl, arg, sizeof lfl); \ 171 } while (0) 172 173#define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ 174 struct LINUX##_##FLOCK lfl; \ 175 struct flock bfl; \ 176 int fl_error; \ 177 if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ 178 return fl_error; \ 179 LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ 180 return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ 181 } while (0) 182#endif /* _KERNEL */ 183 184#endif /* !_LINUX_FCNTL_H */ 185