1/* $NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $ */ 2 3/*- 4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Emmanuel Dreyfus 17 * 4. The name of the author may not be used to endorse or promote 18 * products derived from this software without specific prior written 19 * permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35 36__KERNEL_RCSID(0, "$NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $"); 37 38#include <sys/types.h> 39#include <sys/param.h> 40#include <sys/signal.h> 41#include <sys/fcntl.h> 42#include <sys/filedesc.h> 43 44#include <machine/types.h> 45 46#include <sys/syscallargs.h> 47 48#include <compat/netbsd32/netbsd32.h> 49#include <compat/netbsd32/netbsd32_syscallargs.h> 50 51#include <compat/linux/common/linux_types.h> 52#include <compat/linux/common/linux_fcntl.h> 53#include <compat/linux/common/linux_machdep.h> 54#include <compat/linux/common/linux_misc.h> 55#include <compat/linux/common/linux_ipc.h> 56#include <compat/linux/common/linux_sem.h> 57#include <compat/linux/linux_syscallargs.h> 58 59#include <compat/linux32/common/linux32_types.h> 60#include <compat/linux32/common/linux32_fcntl.h> 61#include <compat/linux32/common/linux32_signal.h> 62#include <compat/linux32/common/linux32_machdep.h> 63#include <compat/linux32/linux32_syscall.h> 64#include <compat/linux32/linux32_syscallargs.h> 65 66struct linux32_flock { 67 short l_type; 68 short l_whence; 69 int32_t l_start; 70 int32_t l_len; 71 linux_pid_t l_pid; 72}; 73 74struct linux32_flock64 { 75 short l_type; 76 short l_whence; 77 netbsd32_int64 l_start; 78 netbsd32_int64 l_len; 79 linux_pid_t l_pid; 80}; 81 82conv_linux_flock(linux32, flock) 83conv_linux_flock(linux32, flock64) 84 85int 86linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval) 87{ 88 /* { 89 syscallarg(const netbsd32_charp) path; 90 syscallarg(int) flags; 91 syscallarg(int) mode; 92 } */ 93 struct linux_sys_open_args ua; 94 95 NETBSD32TOP_UAP(path, const char); 96 NETBSD32TO64_UAP(flags); 97 NETBSD32TO64_UAP(mode); 98 99 return linux_sys_open(l, &ua, retval); 100} 101 102/* 103 * The linux support for 64bit file offsets introduced both an fcntl64() 104 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function 105 * can still be passed LINUX_F_GETLK (etc). 106 * In practice this means that the two functions are identical! 107 * 108 * We have to intercept both sets of locking primitives because the 109 * structure layout of the 64bit version differs from that on amd64 due 110 * to extra padding because the alignment constraint for int64_t differs. 111 */ 112 113int 114linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval) 115{ 116 /* { 117 syscallarg(int) fd; 118 syscallarg(int) cmd; 119 syscallarg(netbsd32_voidp) arg; 120 } */ 121 struct linux_sys_fcntl_args ua; 122 int cmd = SCARG(uap, cmd); 123 124 switch (cmd) { 125 case LINUX32_F_GETLK64: 126 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 127 linux32, flock64); 128 case LINUX32_F_SETLK64: 129 case LINUX32_F_SETLKW64: 130 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 131 linux32, flock64, LINUX_F_SETLK64); 132 case LINUX32_F_GETLK: 133 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 134 linux32, flock); 135 case LINUX32_F_SETLK: 136 case LINUX32_F_SETLKW: 137 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 138 linux32, flock, LINUX_F_SETLK); 139 default: 140 break; 141 } 142 143 NETBSD32TO64_UAP(fd); 144 SCARG(&ua, cmd) = cmd; 145 NETBSD32TOP_UAP(arg, void); 146 147 return linux_sys_fcntl(l, &ua, retval); 148} 149 150#ifdef LINUX32_SYS_fadvise64 151int 152linux32_sys_fadvise64(struct lwp *l, 153 const struct linux32_sys_fadvise64_args *uap, register_t *retval) 154{ 155 /* { 156 syscallarg(int) fd; 157 syscallarg(uint32_t) offlo; 158 syscallarg(uint32_t) offhi; 159 syscallarg(netbsd32_size_t) len; 160 syscallarg(int) advice; 161 } */ 162 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 163 164 return do_posix_fadvise(SCARG(uap, fd), off, 165 SCARG(uap, len), linux_to_bsd_posix_fadv(SCARG(uap, advice))); 166} 167#endif 168 169int 170linux32_sys_fadvise64_64(struct lwp *l, 171 const struct linux32_sys_fadvise64_64_args *uap, register_t *retval) 172{ 173 /* { 174 syscallarg(int) fd; 175 syscallarg(uint32_t) offlo; 176 syscallarg(uint32_t) offhi; 177 syscallarg(uint32_t) lenlo; 178 syscallarg(uint32_t) lenhi; 179 syscallarg(int) advice; 180 } */ 181 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 182 off_t len = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); 183 184 return do_posix_fadvise(SCARG(uap, fd), off, 185 len, linux_to_bsd_posix_fadv(SCARG(uap, advice))); 186} 187