linux_file64.c revision 1.10
1 /* $NetBSD: linux_file64.c,v 1.10 2002/03/22 17:14:18 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 2000 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Linux 64bit filesystem calls. Used on 32bit archs, not used on 64bit ones. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: linux_file64.c,v 1.10 2002/03/22 17:14:18 christos Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/proc.h> 50 #include <sys/file.h> 51 #include <sys/stat.h> 52 #include <sys/filedesc.h> 53 #include <sys/ioctl.h> 54 #include <sys/kernel.h> 55 #include <sys/mount.h> 56 #include <sys/malloc.h> 57 #include <sys/vnode.h> 58 #include <sys/tty.h> 59 #include <sys/conf.h> 60 61 #include <sys/syscallargs.h> 62 63 #include <compat/linux/common/linux_types.h> 64 #include <compat/linux/common/linux_signal.h> 65 #include <compat/linux/common/linux_fcntl.h> 66 #include <compat/linux/common/linux_util.h> 67 #include <compat/linux/common/linux_machdep.h> 68 69 #include <compat/linux/linux_syscallargs.h> 70 71 static void bsd_to_linux_stat __P((struct stat *, struct linux_stat64 *)); 72 static int linux_do_stat64 __P((struct proc *, void *, register_t *, int)); 73 74 /* 75 * Convert a NetBSD stat structure to a Linux stat structure. 76 * Only the order of the fields and the padding in the structure 77 * is different. linux_fakedev is a machine-dependent function 78 * which optionally converts device driver major/minor numbers 79 * (XXX horrible, but what can you do against code that compares 80 * things against constant major device numbers? sigh) 81 */ 82 static void 83 bsd_to_linux_stat(bsp, lsp) 84 struct stat *bsp; 85 struct linux_stat64 *lsp; 86 { 87 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 88 lsp->lst_ino = bsp->st_ino; 89 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 90 if (bsp->st_nlink >= (1 << 15)) 91 lsp->lst_nlink = (1 << 15) - 1; 92 else 93 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 94 lsp->lst_uid = bsp->st_uid; 95 lsp->lst_gid = bsp->st_gid; 96 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 97 lsp->lst_size = bsp->st_size; 98 lsp->lst_blksize = bsp->st_blksize; 99 lsp->lst_blocks = bsp->st_blocks; 100 lsp->lst_atime = bsp->st_atime; 101 lsp->lst_mtime = bsp->st_mtime; 102 lsp->lst_ctime = bsp->st_ctime; 103 lsp->lst_ino64 = bsp->st_ino; 104 } 105 106 /* 107 * The stat functions below are plain sailing. stat and lstat are handled 108 * by one function to avoid code duplication. 109 */ 110 int 111 linux_sys_fstat64(p, v, retval) 112 struct proc *p; 113 void *v; 114 register_t *retval; 115 { 116 struct linux_sys_fstat64_args /* { 117 syscallarg(int) fd; 118 syscallarg(struct linux_stat64 *) sp; 119 } */ *uap = v; 120 struct sys___fstat13_args fsa; 121 struct linux_stat64 tmplst; 122 struct stat *st,tmpst; 123 caddr_t sg; 124 int error; 125 126 sg = stackgap_init(p, 0); 127 128 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 129 130 SCARG(&fsa, fd) = SCARG(uap, fd); 131 SCARG(&fsa, sb) = st; 132 133 if ((error = sys___fstat13(p, &fsa, retval))) 134 return error; 135 136 if ((error = copyin(st, &tmpst, sizeof tmpst))) 137 return error; 138 139 bsd_to_linux_stat(&tmpst, &tmplst); 140 141 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 142 return error; 143 144 return 0; 145 } 146 147 static int 148 linux_do_stat64(p, v, retval, dolstat) 149 struct proc *p; 150 void *v; 151 register_t *retval; 152 int dolstat; 153 { 154 struct sys___stat13_args sa; 155 struct linux_stat64 tmplst; 156 struct stat *st, tmpst; 157 caddr_t sg; 158 int error; 159 struct linux_sys_stat64_args *uap = v; 160 161 sg = stackgap_init(p, 0); 162 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 163 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 164 165 SCARG(&sa, ub) = st; 166 SCARG(&sa, path) = SCARG(uap, path); 167 168 if ((error = (dolstat ? sys___lstat13(p, &sa, retval) : 169 sys___stat13(p, &sa, retval)))) 170 return error; 171 172 if ((error = copyin(st, &tmpst, sizeof tmpst))) 173 return error; 174 175 bsd_to_linux_stat(&tmpst, &tmplst); 176 177 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 178 return error; 179 180 return 0; 181 } 182 183 int 184 linux_sys_stat64(p, v, retval) 185 struct proc *p; 186 void *v; 187 register_t *retval; 188 { 189 struct linux_sys_stat64_args /* { 190 syscallarg(const char *) path; 191 syscallarg(struct linux_stat64 *) sp; 192 } */ *uap = v; 193 194 return linux_do_stat64(p, uap, retval, 0); 195 } 196 197 int 198 linux_sys_lstat64(p, v, retval) 199 struct proc *p; 200 void *v; 201 register_t *retval; 202 { 203 struct linux_sys_lstat64_args /* { 204 syscallarg(const char *) path; 205 syscallarg(struct linux_stat64 *) sp; 206 } */ *uap = v; 207 208 return linux_do_stat64(p, uap, retval, 1); 209 } 210 211 int 212 linux_sys_truncate64(p, v, retval) 213 struct proc *p; 214 void *v; 215 register_t *retval; 216 { 217 struct linux_sys_truncate64_args /* { 218 syscallarg(const char *) path; 219 syscallarg(off_t) length; 220 } */ *uap = v; 221 caddr_t sg = stackgap_init(p, 0); 222 223 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 224 225 return sys_truncate(p, uap, retval); 226 } 227 228 #if defined(__mips__) || defined(__i386__) /* powerpc could use it too */ 229 static void bsd_to_linux_flock64 __P((struct linux_flock64 *, 230 const struct flock *)); 231 static void linux_to_bsd_flock64 __P((struct flock *, 232 const struct linux_flock64 *)); 233 234 static void 235 bsd_to_linux_flock64(lfp, bfp) 236 struct linux_flock64 *lfp; 237 const struct flock *bfp; 238 { 239 240 lfp->l_start = bfp->l_start; 241 lfp->l_len = bfp->l_len; 242 lfp->l_pid = bfp->l_pid; 243 lfp->l_whence = bfp->l_whence; 244 switch (bfp->l_type) { 245 case F_RDLCK: 246 lfp->l_type = LINUX_F_RDLCK; 247 break; 248 case F_UNLCK: 249 lfp->l_type = LINUX_F_UNLCK; 250 break; 251 case F_WRLCK: 252 lfp->l_type = LINUX_F_WRLCK; 253 break; 254 } 255 } 256 257 static void 258 linux_to_bsd_flock64(bfp, lfp) 259 struct flock *bfp; 260 const struct linux_flock64 *lfp; 261 { 262 263 bfp->l_start = lfp->l_start; 264 bfp->l_len = lfp->l_len; 265 bfp->l_pid = lfp->l_pid; 266 bfp->l_whence = lfp->l_whence; 267 switch (lfp->l_type) { 268 case LINUX_F_RDLCK: 269 bfp->l_type = F_RDLCK; 270 break; 271 case LINUX_F_UNLCK: 272 bfp->l_type = F_UNLCK; 273 break; 274 case LINUX_F_WRLCK: 275 bfp->l_type = F_WRLCK; 276 break; 277 } 278 } 279 int 280 linux_sys_fcntl64(p, v, retval) 281 struct proc *p; 282 void *v; 283 register_t *retval; 284 { 285 struct linux_sys_fcntl64_args /* { 286 syscallarg(int) fd; 287 syscallarg(int) cmd; 288 syscallarg(void *) arg; 289 } */ *uap = v; 290 struct sys_fcntl_args fca; 291 struct linux_flock64 lfl; 292 struct flock bfl, *bfp; 293 int error; 294 caddr_t sg; 295 void *arg = SCARG(uap, arg); 296 int cmd = SCARG(uap, cmd); 297 int fd = SCARG(uap, fd); 298 299 switch (cmd) { 300 case LINUX_F_GETLK64: 301 sg = stackgap_init(p, 0); 302 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 303 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 304 return error; 305 linux_to_bsd_flock64(&bfl, &lfl); 306 if ((error = copyout(&bfl, bfp, sizeof bfl)) != 0) 307 return error; 308 SCARG(&fca, fd) = fd; 309 SCARG(&fca, cmd) = F_GETLK; 310 SCARG(&fca, arg) = bfp; 311 if ((error = sys_fcntl(p, &fca, retval)) != 0) 312 return error; 313 if ((error = copyin(bfp, &bfl, sizeof bfl)) != 0) 314 return error; 315 bsd_to_linux_flock64(&lfl, &bfl); 316 return copyout(&lfl, arg, sizeof lfl); 317 case LINUX_F_SETLK64: 318 case LINUX_F_SETLKW64: 319 cmd = (cmd == LINUX_F_SETLK64 ? F_SETLK : F_SETLKW); 320 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 321 return error; 322 linux_to_bsd_flock64(&bfl, &lfl); 323 sg = stackgap_init(p, 0); 324 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 325 if ((error = copyout(&bfl, bfp, sizeof bfl)) != 0) 326 return error; 327 SCARG(&fca, fd) = fd; 328 SCARG(&fca, cmd) = cmd; 329 SCARG(&fca, arg) = bfp; 330 return sys_fcntl(p, &fca, retval); 331 default: 332 return linux_sys_fcntl(p, v, retval); 333 } 334 335 return error; 336 } 337 #endif /* __mips__ || __i386__ */ 338
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