linux_file64.c revision 1.2.4.7
1 /* $NetBSD: linux_file64.c,v 1.2.4.7 2002/04/01 07:44:25 nathanw 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 1.2.4.7 2002/04/01 07:44:25 nathanw 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 lwp *, 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(l, v, retval) 112 struct lwp *l; 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 proc *p = l->l_proc; 121 struct sys___fstat13_args fsa; 122 struct linux_stat64 tmplst; 123 struct stat *st,tmpst; 124 caddr_t sg; 125 int error; 126 127 sg = stackgap_init(p, 0); 128 129 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 130 131 SCARG(&fsa, fd) = SCARG(uap, fd); 132 SCARG(&fsa, sb) = st; 133 134 if ((error = sys___fstat13(l, &fsa, retval))) 135 return error; 136 137 if ((error = copyin(st, &tmpst, sizeof tmpst))) 138 return error; 139 140 bsd_to_linux_stat(&tmpst, &tmplst); 141 142 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 143 return error; 144 145 return 0; 146 } 147 148 static int 149 linux_do_stat64(l, v, retval, dolstat) 150 struct lwp *l; 151 void *v; 152 register_t *retval; 153 int dolstat; 154 { 155 struct proc *p = l->l_proc; 156 struct sys___stat13_args sa; 157 struct linux_stat64 tmplst; 158 struct stat *st, tmpst; 159 caddr_t sg; 160 int error; 161 struct linux_sys_stat64_args *uap = v; 162 163 sg = stackgap_init(p, 0); 164 st = stackgap_alloc(p, &sg, sizeof (struct stat)); 165 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 166 167 SCARG(&sa, ub) = st; 168 SCARG(&sa, path) = SCARG(uap, path); 169 170 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 171 sys___stat13(l, &sa, retval)))) 172 return error; 173 174 if ((error = copyin(st, &tmpst, sizeof tmpst))) 175 return error; 176 177 bsd_to_linux_stat(&tmpst, &tmplst); 178 179 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 180 return error; 181 182 return 0; 183 } 184 185 int 186 linux_sys_stat64(l, v, retval) 187 struct lwp *l; 188 void *v; 189 register_t *retval; 190 { 191 struct linux_sys_stat64_args /* { 192 syscallarg(const char *) path; 193 syscallarg(struct linux_stat64 *) sp; 194 } */ *uap = v; 195 196 return linux_do_stat64(l, uap, retval, 0); 197 } 198 199 int 200 linux_sys_lstat64(l, v, retval) 201 struct lwp *l; 202 void *v; 203 register_t *retval; 204 { 205 struct linux_sys_lstat64_args /* { 206 syscallarg(const char *) path; 207 syscallarg(struct linux_stat64 *) sp; 208 } */ *uap = v; 209 210 return linux_do_stat64(l, uap, retval, 1); 211 } 212 213 int 214 linux_sys_truncate64(l, v, retval) 215 struct lwp *l; 216 void *v; 217 register_t *retval; 218 { 219 struct linux_sys_truncate64_args /* { 220 syscallarg(const char *) path; 221 syscallarg(off_t) length; 222 } */ *uap = v; 223 struct proc *p = l->l_proc; 224 caddr_t sg = stackgap_init(p, 0); 225 226 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 227 228 return sys_truncate(l, uap, retval); 229 } 230 231 #if defined(__mips__) || defined(__i386__) /* powerpc could use it too */ 232 static void bsd_to_linux_flock64 __P((struct linux_flock64 *, 233 const struct flock *)); 234 static void linux_to_bsd_flock64 __P((struct flock *, 235 const struct linux_flock64 *)); 236 237 static void 238 bsd_to_linux_flock64(lfp, bfp) 239 struct linux_flock64 *lfp; 240 const struct flock *bfp; 241 { 242 243 lfp->l_start = bfp->l_start; 244 lfp->l_len = bfp->l_len; 245 lfp->l_pid = bfp->l_pid; 246 lfp->l_whence = bfp->l_whence; 247 switch (bfp->l_type) { 248 case F_RDLCK: 249 lfp->l_type = LINUX_F_RDLCK; 250 break; 251 case F_UNLCK: 252 lfp->l_type = LINUX_F_UNLCK; 253 break; 254 case F_WRLCK: 255 lfp->l_type = LINUX_F_WRLCK; 256 break; 257 } 258 } 259 260 static void 261 linux_to_bsd_flock64(bfp, lfp) 262 struct flock *bfp; 263 const struct linux_flock64 *lfp; 264 { 265 266 bfp->l_start = lfp->l_start; 267 bfp->l_len = lfp->l_len; 268 bfp->l_pid = lfp->l_pid; 269 bfp->l_whence = lfp->l_whence; 270 switch (lfp->l_type) { 271 case LINUX_F_RDLCK: 272 bfp->l_type = F_RDLCK; 273 break; 274 case LINUX_F_UNLCK: 275 bfp->l_type = F_UNLCK; 276 break; 277 case LINUX_F_WRLCK: 278 bfp->l_type = F_WRLCK; 279 break; 280 } 281 } 282 int 283 linux_sys_fcntl64(l, v, retval) 284 struct lwp *l; 285 void *v; 286 register_t *retval; 287 { 288 struct linux_sys_fcntl64_args /* { 289 syscallarg(int) fd; 290 syscallarg(int) cmd; 291 syscallarg(void *) arg; 292 } */ *uap = v; 293 struct proc *p = l->l_proc; 294 struct sys_fcntl_args fca; 295 struct linux_flock64 lfl; 296 struct flock bfl, *bfp; 297 int error; 298 caddr_t sg; 299 void *arg = SCARG(uap, arg); 300 int cmd = SCARG(uap, cmd); 301 int fd = SCARG(uap, fd); 302 303 switch (cmd) { 304 case LINUX_F_GETLK64: 305 sg = stackgap_init(p, 0); 306 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 307 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 308 return error; 309 linux_to_bsd_flock64(&bfl, &lfl); 310 if ((error = copyout(&bfl, bfp, sizeof bfl)) != 0) 311 return error; 312 SCARG(&fca, fd) = fd; 313 SCARG(&fca, cmd) = F_GETLK; 314 SCARG(&fca, arg) = bfp; 315 if ((error = sys_fcntl(p, &fca, retval)) != 0) 316 return error; 317 if ((error = copyin(bfp, &bfl, sizeof bfl)) != 0) 318 return error; 319 bsd_to_linux_flock64(&lfl, &bfl); 320 return copyout(&lfl, arg, sizeof lfl); 321 case LINUX_F_SETLK64: 322 case LINUX_F_SETLKW64: 323 cmd = (cmd == LINUX_F_SETLK64 ? F_SETLK : F_SETLKW); 324 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 325 return error; 326 linux_to_bsd_flock64(&bfl, &lfl); 327 sg = stackgap_init(p, 0); 328 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 329 if ((error = copyout(&bfl, bfp, sizeof bfl)) != 0) 330 return error; 331 SCARG(&fca, fd) = fd; 332 SCARG(&fca, cmd) = cmd; 333 SCARG(&fca, arg) = bfp; 334 return sys_fcntl(p, &fca, retval); 335 default: 336 return linux_sys_fcntl(l, v, retval); 337 } 338 339 return error; 340 } 341 #endif /* __mips__ || __i386__ */ 342
Indexes created Tue Sep 30 10:09:55 GMT 2025