1 /* $NetBSD: linux32_fcntl.c,v 1.12 2026/09/20 13:43:51 riastradh 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 1.12 2026/09/20 13:43:51 riastradh 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 66 struct 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 74 struct 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 82 conv_linux_flock(linux32, flock) 83 conv_linux_flock(linux32, flock64) 84 85 int 86 linux32_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 memset(&ua, 0, sizeof(ua)); 96 NETBSD32TOP_UAP(path, const char); 97 NETBSD32TO64_UAP(flags); 98 NETBSD32TO64_UAP(mode); 99 100 return linux_sys_open(l, &ua, retval); 101 } 102 103 /* 104 * The linux support for 64bit file offsets introduced both an fcntl64() 105 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function 106 * can still be passed LINUX_F_GETLK (etc). 107 * In practice this means that the two functions are identical! 108 * 109 * We have to intercept both sets of locking primitives because the 110 * structure layout of the 64bit version differs from that on amd64 due 111 * to extra padding because the alignment constraint for int64_t differs. 112 */ 113 114 int 115 linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval) 116 { 117 /* { 118 syscallarg(int) fd; 119 syscallarg(int) cmd; 120 syscallarg(netbsd32_voidp) arg; 121 } */ 122 struct linux_sys_fcntl_args ua; 123 int cmd = SCARG(uap, cmd); 124 125 switch (cmd) { 126 case LINUX32_F_GETLK64: 127 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 128 linux32, flock64); 129 case LINUX32_F_SETLK64: 130 case LINUX32_F_SETLKW64: 131 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 132 linux32, flock64, LINUX_F_SETLK64); 133 case LINUX32_F_GETLK: 134 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 135 linux32, flock); 136 case LINUX32_F_SETLK: 137 case LINUX32_F_SETLKW: 138 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 139 linux32, flock, LINUX_F_SETLK); 140 default: 141 break; 142 } 143 144 memset(&ua, 0, sizeof(ua)); 145 NETBSD32TO64_UAP(fd); 146 SCARG(&ua, cmd) = cmd; 147 NETBSD32TOP_UAP(arg, void); 148 149 return linux_sys_fcntl(l, &ua, retval); 150 } 151 152 #ifdef LINUX32_SYS_fadvise64 153 int 154 linux32_sys_fadvise64(struct lwp *l, 155 const struct linux32_sys_fadvise64_args *uap, register_t *retval) 156 { 157 /* { 158 syscallarg(int) fd; 159 syscallarg(uint32_t) offlo; 160 syscallarg(uint32_t) offhi; 161 syscallarg(netbsd32_size_t) len; 162 syscallarg(int) advice; 163 } */ 164 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 165 166 return do_posix_fadvise(SCARG(uap, fd), off, 167 SCARG(uap, len), linux_to_bsd_posix_fadv(SCARG(uap, advice))); 168 } 169 #endif 170 171 int 172 linux32_sys_fadvise64_64(struct lwp *l, 173 const struct linux32_sys_fadvise64_64_args *uap, register_t *retval) 174 { 175 /* { 176 syscallarg(int) fd; 177 syscallarg(uint32_t) offlo; 178 syscallarg(uint32_t) offhi; 179 syscallarg(uint32_t) lenlo; 180 syscallarg(uint32_t) lenhi; 181 syscallarg(int) advice; 182 } */ 183 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 184 off_t len = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); 185 186 return do_posix_fadvise(SCARG(uap, fd), off, 187 len, linux_to_bsd_posix_fadv(SCARG(uap, advice))); 188 } 189
Indexes created Sun Oct 25 00:26:45 UTC 2026