/* $NetBSD: linux_fcntl.h,v 1.17.22.1 2019/09/13 06:25:25 martin Exp $ */ /*- * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LINUX_FCNTL_H #define _LINUX_FCNTL_H /* * The arguments in the flock structure have a different order from the * BSD structure. */ /* read/write mode for open(2) */ #define LINUX_O_RDONLY 0x0000 #define LINUX_O_WRONLY 0x0001 #define LINUX_O_RDWR 0x0002 #define LINUX_O_ACCMODE 0x0003 #define LINUX_AT_FDCWD -100 #define LINUX_AT_SYMLINK_NOFOLLOW 0x0100 #define LINUX_AT_REMOVEDIR 0x0200 #define LINUX_AT_SYMLINK_FOLLOW 0x0400 #define LINUX_AT_NO_AUTOMOUNT 0x0800 #define LINUX_AT_EMPTY_PATH 0x1000 int linux_to_bsd_ioflags(int); int linux_to_bsd_atflags(int); struct linux_flock { short l_type; short l_whence; linux_off_t l_start; linux_off_t l_len; linux_pid_t l_pid; }; struct linux_flock64 { short l_type; short l_whence; off_t l_start; off_t l_len; linux_pid_t l_pid; }; #if defined(__i386__) #include #elif defined(__m68k__) #include #elif defined(__alpha__) #include #elif defined(__powerpc__) #include #elif defined(__mips__) #include #elif defined(__arm__) #include #elif defined(__amd64__) #include #else #error Undefined linux_fcntl.h machine type. #endif /* Linux specific fcntl(2) commands */ #define LINUX_F_SPECIFIC_BASE 1024 #define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) #define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) #define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) #define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) #define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) #define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) #define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) /* * We have to have 4 copies of the code that converts linux fcntl() file * locking to native form because there are 4 layouts for the structures. * To avoid replicating code, these defines are used. * * The next two functions take care of converting the flock * structure back and forth between Linux and NetBSD format. * The only difference in the structures is the order and size of * the fields, and the 'whence' value. */ #define conv_linux_flock(LINUX, FLOCK) \ static void \ bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ copy_flock(lfp, LINUX_F, bfp, F) \ \ static void \ LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ copy_flock(bfp, F, lfp, LINUX_F) #define copy_flock(dst, dst_f, src, src_f) { \ dst->l_start = src->l_start; \ dst->l_len = src->l_len; \ dst->l_pid = src->l_pid; \ dst->l_whence = src->l_whence; \ switch (src->l_type) { \ case src_f##_RDLCK: \ dst->l_type = dst_f##_RDLCK; \ break; \ case src_f##_UNLCK: \ dst->l_type = dst_f##_UNLCK; \ break; \ case src_f##_WRLCK: \ dst->l_type = dst_f##_WRLCK; \ break; \ default: \ dst->l_type = -1; \ break; \ } \ } /* * These two defines do the work within the sys_fcntl() switch statement. */ #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ struct LINUX##_##FLOCK lfl; \ struct flock bfl; \ int fl_error; \ if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ return fl_error; \ LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ if (fl_error) \ return fl_error; \ bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ return copyout(&lfl, arg, sizeof lfl); \ } while (0) #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ struct LINUX##_##FLOCK lfl; \ struct flock bfl; \ int fl_error; \ if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ return fl_error; \ LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ } while (0) #endif /* !_LINUX_FCNTL_H */