linux_file.c revision 1.82
1 /* $NetBSD: linux_file.c,v 1.82 2007/04/22 08:29:57 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 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 * Functions in multiarch: 41 * linux_sys_llseek : linux_llseek.c 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: linux_file.c,v 1.82 2007/04/22 08:29:57 dsl Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/proc.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/filedesc.h> 54 #include <sys/ioctl.h> 55 #include <sys/kernel.h> 56 #include <sys/mount.h> 57 #include <sys/malloc.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/tty.h> 61 #include <sys/socketvar.h> 62 #include <sys/conf.h> 63 #include <sys/pipe.h> 64 65 #include <sys/syscallargs.h> 66 #include <sys/vfs_syscalls.h> 67 68 #include <compat/linux/common/linux_types.h> 69 #include <compat/linux/common/linux_signal.h> 70 #include <compat/linux/common/linux_fcntl.h> 71 #include <compat/linux/common/linux_util.h> 72 #include <compat/linux/common/linux_machdep.h> 73 74 #include <compat/linux/linux_syscallargs.h> 75 76 static int linux_to_bsd_ioflags __P((int)); 77 static int bsd_to_linux_ioflags __P((int)); 78 static void bsd_to_linux_flock __P((struct flock *, struct linux_flock *)); 79 static void linux_to_bsd_flock __P((struct linux_flock *, struct flock *)); 80 #ifndef __amd64__ 81 static void bsd_to_linux_stat __P((struct stat *, struct linux_stat *)); 82 static int linux_stat1 __P((struct lwp *, void *, register_t *, int)); 83 #endif 84 85 /* 86 * Some file-related calls are handled here. The usual flag conversion 87 * an structure conversion is done, and alternate emul path searching. 88 */ 89 90 /* 91 * The next two functions convert between the Linux and NetBSD values 92 * of the flags used in open(2) and fcntl(2). 93 */ 94 static int 95 linux_to_bsd_ioflags(lflags) 96 int lflags; 97 { 98 int res = 0; 99 100 res |= cvtto_bsd_mask(lflags, LINUX_O_WRONLY, O_WRONLY); 101 res |= cvtto_bsd_mask(lflags, LINUX_O_RDONLY, O_RDONLY); 102 res |= cvtto_bsd_mask(lflags, LINUX_O_RDWR, O_RDWR); 103 res |= cvtto_bsd_mask(lflags, LINUX_O_CREAT, O_CREAT); 104 res |= cvtto_bsd_mask(lflags, LINUX_O_EXCL, O_EXCL); 105 res |= cvtto_bsd_mask(lflags, LINUX_O_NOCTTY, O_NOCTTY); 106 res |= cvtto_bsd_mask(lflags, LINUX_O_TRUNC, O_TRUNC); 107 res |= cvtto_bsd_mask(lflags, LINUX_O_NDELAY, O_NDELAY); 108 res |= cvtto_bsd_mask(lflags, LINUX_O_SYNC, O_FSYNC); 109 res |= cvtto_bsd_mask(lflags, LINUX_FASYNC, O_ASYNC); 110 res |= cvtto_bsd_mask(lflags, LINUX_O_APPEND, O_APPEND); 111 112 return res; 113 } 114 115 static int 116 bsd_to_linux_ioflags(bflags) 117 int bflags; 118 { 119 int res = 0; 120 121 res |= cvtto_linux_mask(bflags, O_WRONLY, LINUX_O_WRONLY); 122 res |= cvtto_linux_mask(bflags, O_RDONLY, LINUX_O_RDONLY); 123 res |= cvtto_linux_mask(bflags, O_RDWR, LINUX_O_RDWR); 124 res |= cvtto_linux_mask(bflags, O_CREAT, LINUX_O_CREAT); 125 res |= cvtto_linux_mask(bflags, O_EXCL, LINUX_O_EXCL); 126 res |= cvtto_linux_mask(bflags, O_NOCTTY, LINUX_O_NOCTTY); 127 res |= cvtto_linux_mask(bflags, O_TRUNC, LINUX_O_TRUNC); 128 res |= cvtto_linux_mask(bflags, O_NDELAY, LINUX_O_NDELAY); 129 res |= cvtto_linux_mask(bflags, O_FSYNC, LINUX_O_SYNC); 130 res |= cvtto_linux_mask(bflags, O_ASYNC, LINUX_FASYNC); 131 res |= cvtto_linux_mask(bflags, O_APPEND, LINUX_O_APPEND); 132 133 return res; 134 } 135 136 /* 137 * creat(2) is an obsolete function, but it's present as a Linux 138 * system call, so let's deal with it. 139 * 140 * Note: On the Alpha this doesn't really exist in Linux, but it's defined 141 * in syscalls.master anyway so this doesn't have to be special cased. 142 * 143 * Just call open(2) with the TRUNC, CREAT and WRONLY flags. 144 */ 145 int 146 linux_sys_creat(l, v, retval) 147 struct lwp *l; 148 void *v; 149 register_t *retval; 150 { 151 struct linux_sys_creat_args /* { 152 syscallarg(const char *) path; 153 syscallarg(int) mode; 154 } */ *uap = v; 155 struct sys_open_args oa; 156 157 SCARG(&oa, path) = SCARG(uap, path); 158 SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY; 159 SCARG(&oa, mode) = SCARG(uap, mode); 160 161 return sys_open(l, &oa, retval); 162 } 163 164 /* 165 * open(2). Take care of the different flag values, and let the 166 * NetBSD syscall do the real work. See if this operation 167 * gives the current process a controlling terminal. 168 * (XXX is this necessary?) 169 */ 170 int 171 linux_sys_open(l, v, retval) 172 struct lwp *l; 173 void *v; 174 register_t *retval; 175 { 176 struct linux_sys_open_args /* { 177 syscallarg(const char *) path; 178 syscallarg(int) flags; 179 syscallarg(int) mode; 180 } */ *uap = v; 181 struct proc *p = l->l_proc; 182 int error, fl; 183 struct sys_open_args boa; 184 185 fl = linux_to_bsd_ioflags(SCARG(uap, flags)); 186 187 SCARG(&boa, path) = SCARG(uap, path); 188 SCARG(&boa, flags) = fl; 189 SCARG(&boa, mode) = SCARG(uap, mode); 190 191 if ((error = sys_open(l, &boa, retval))) 192 return error; 193 194 /* 195 * this bit from sunos_misc.c (and svr4_fcntl.c). 196 * If we are a session leader, and we don't have a controlling 197 * terminal yet, and the O_NOCTTY flag is not set, try to make 198 * this the controlling terminal. 199 */ 200 if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_lflag & PL_CONTROLT)) { 201 struct filedesc *fdp = p->p_fd; 202 struct file *fp; 203 204 fp = fd_getfile(fdp, *retval); 205 206 /* ignore any error, just give it a try */ 207 if (fp != NULL) { 208 FILE_USE(fp); 209 if (fp->f_type == DTYPE_VNODE) { 210 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, 211 (void *) 0, l); 212 } 213 FILE_UNUSE(fp, l); 214 } 215 } 216 return 0; 217 } 218 219 /* 220 * The next two functions take care of converting the flock 221 * structure back and forth between Linux and NetBSD format. 222 * The only difference in the structures is the order of 223 * the fields, and the 'whence' value. 224 */ 225 static void 226 bsd_to_linux_flock(bfp, lfp) 227 struct flock *bfp; 228 struct linux_flock *lfp; 229 { 230 231 lfp->l_start = bfp->l_start; 232 lfp->l_len = bfp->l_len; 233 lfp->l_pid = bfp->l_pid; 234 lfp->l_whence = bfp->l_whence; 235 switch (bfp->l_type) { 236 case F_RDLCK: 237 lfp->l_type = LINUX_F_RDLCK; 238 break; 239 case F_UNLCK: 240 lfp->l_type = LINUX_F_UNLCK; 241 break; 242 case F_WRLCK: 243 lfp->l_type = LINUX_F_WRLCK; 244 break; 245 } 246 } 247 248 static void 249 linux_to_bsd_flock(lfp, bfp) 250 struct linux_flock *lfp; 251 struct flock *bfp; 252 { 253 254 bfp->l_start = lfp->l_start; 255 bfp->l_len = lfp->l_len; 256 bfp->l_pid = lfp->l_pid; 257 bfp->l_whence = lfp->l_whence; 258 switch (lfp->l_type) { 259 case LINUX_F_RDLCK: 260 bfp->l_type = F_RDLCK; 261 break; 262 case LINUX_F_UNLCK: 263 bfp->l_type = F_UNLCK; 264 break; 265 case LINUX_F_WRLCK: 266 bfp->l_type = F_WRLCK; 267 break; 268 } 269 } 270 271 /* 272 * Most actions in the fcntl() call are straightforward; simply 273 * pass control to the NetBSD system call. A few commands need 274 * conversions after the actual system call has done its work, 275 * because the flag values and lock structure are different. 276 */ 277 int 278 linux_sys_fcntl(l, v, retval) 279 struct lwp *l; 280 void *v; 281 register_t *retval; 282 { 283 struct linux_sys_fcntl_args /* { 284 syscallarg(int) fd; 285 syscallarg(int) cmd; 286 syscallarg(void *) arg; 287 } */ *uap = v; 288 struct proc *p = l->l_proc; 289 int fd, cmd, error; 290 u_long val; 291 void *arg, *sg; 292 struct linux_flock lfl; 293 struct flock *bfp, bfl; 294 struct sys_fcntl_args fca; 295 struct filedesc *fdp; 296 struct file *fp; 297 struct vnode *vp; 298 struct vattr va; 299 const struct cdevsw *cdev; 300 long pgid; 301 struct pgrp *pgrp; 302 struct tty *tp, *(*d_tty) __P((dev_t)); 303 304 fd = SCARG(uap, fd); 305 cmd = SCARG(uap, cmd); 306 arg = (void *) SCARG(uap, arg); 307 308 switch (cmd) { 309 case LINUX_F_DUPFD: 310 cmd = F_DUPFD; 311 break; 312 case LINUX_F_GETFD: 313 cmd = F_GETFD; 314 break; 315 case LINUX_F_SETFD: 316 cmd = F_SETFD; 317 break; 318 case LINUX_F_GETFL: 319 SCARG(&fca, fd) = fd; 320 SCARG(&fca, cmd) = F_GETFL; 321 SCARG(&fca, arg) = arg; 322 if ((error = sys_fcntl(l, &fca, retval))) 323 return error; 324 retval[0] = bsd_to_linux_ioflags(retval[0]); 325 return 0; 326 case LINUX_F_SETFL: { 327 struct file *fp1 = NULL; 328 329 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 330 /* 331 * Linux seems to have same semantics for sending SIGIO to the 332 * read side of socket, but slightly different semantics 333 * for SIGIO to the write side. Rather than sending the SIGIO 334 * every time it's possible to write (directly) more data, it 335 * only sends SIGIO if last write(2) failed due to insufficient 336 * memory to hold the data. This is compatible enough 337 * with NetBSD semantics to not do anything about the 338 * difference. 339 * 340 * Linux does NOT send SIGIO for pipes. Deal with socketpair 341 * ones and DTYPE_PIPE ones. For these, we don't set 342 * the underlying flags (we don't pass O_ASYNC flag down 343 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 344 * so that F_GETFL would report the ASYNC i/o is on. 345 */ 346 if (val & O_ASYNC) { 347 if (((fp1 = fd_getfile(p->p_fd, fd)) == NULL)) 348 return (EBADF); 349 350 FILE_USE(fp1); 351 352 if (((fp1->f_type == DTYPE_SOCKET) && fp1->f_data 353 && ((struct socket *)fp1->f_data)->so_state & SS_ISAPIPE) 354 || (fp1->f_type == DTYPE_PIPE)) 355 val &= ~O_ASYNC; 356 else { 357 /* not a pipe, do not modify anything */ 358 FILE_UNUSE(fp1, l); 359 fp1 = NULL; 360 } 361 } 362 363 SCARG(&fca, fd) = fd; 364 SCARG(&fca, cmd) = F_SETFL; 365 SCARG(&fca, arg) = (void *) val; 366 367 error = sys_fcntl(l, &fca, retval); 368 369 /* Now set the FASYNC flag for pipes */ 370 if (fp1) { 371 if (!error) 372 fp1->f_flag |= FASYNC; 373 FILE_UNUSE(fp1, l); 374 } 375 376 return (error); 377 } 378 case LINUX_F_GETLK: 379 sg = stackgap_init(p, 0); 380 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 381 if ((error = copyin(arg, &lfl, sizeof lfl))) 382 return error; 383 linux_to_bsd_flock(&lfl, &bfl); 384 if ((error = copyout(&bfl, bfp, sizeof bfl))) 385 return error; 386 SCARG(&fca, fd) = fd; 387 SCARG(&fca, cmd) = F_GETLK; 388 SCARG(&fca, arg) = bfp; 389 if ((error = sys_fcntl(l, &fca, retval))) 390 return error; 391 if ((error = copyin(bfp, &bfl, sizeof bfl))) 392 return error; 393 bsd_to_linux_flock(&bfl, &lfl); 394 return copyout(&lfl, arg, sizeof lfl); 395 396 case LINUX_F_SETLK: 397 case LINUX_F_SETLKW: 398 cmd = (cmd == LINUX_F_SETLK ? F_SETLK : F_SETLKW); 399 if ((error = copyin(arg, &lfl, sizeof lfl))) 400 return error; 401 linux_to_bsd_flock(&lfl, &bfl); 402 sg = stackgap_init(p, 0); 403 bfp = (struct flock *) stackgap_alloc(p, &sg, sizeof *bfp); 404 if ((error = copyout(&bfl, bfp, sizeof bfl))) 405 return error; 406 arg = (void *)bfp; 407 break; 408 409 case LINUX_F_SETOWN: 410 case LINUX_F_GETOWN: 411 /* 412 * We need to route fcntl() for tty descriptors around normal 413 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 414 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 415 * this is not a problem. 416 */ 417 fdp = p->p_fd; 418 if ((fp = fd_getfile(fdp, fd)) == NULL) 419 return EBADF; 420 FILE_USE(fp); 421 422 /* Check it's a character device vnode */ 423 if (fp->f_type != DTYPE_VNODE 424 || (vp = (struct vnode *)fp->f_data) == NULL 425 || vp->v_type != VCHR) { 426 FILE_UNUSE(fp, l); 427 428 not_tty: 429 /* Not a tty, proceed with common fcntl() */ 430 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 431 break; 432 } 433 434 error = VOP_GETATTR(vp, &va, l->l_cred, l); 435 436 FILE_UNUSE(fp, l); 437 438 if (error) 439 return error; 440 441 cdev = cdevsw_lookup(va.va_rdev); 442 if (cdev == NULL) 443 return (ENXIO); 444 d_tty = cdev->d_tty; 445 if (!d_tty || (!(tp = (*d_tty)(va.va_rdev)))) 446 goto not_tty; 447 448 /* set tty pg_id appropriately */ 449 if (cmd == LINUX_F_GETOWN) { 450 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 451 return 0; 452 } 453 mutex_enter(&proclist_lock); 454 if ((long)arg <= 0) { 455 pgid = -(long)arg; 456 } else { 457 struct proc *p1 = p_find((long)arg, PFIND_LOCKED | PFIND_UNLOCK_FAIL); 458 if (p1 == NULL) 459 return (ESRCH); 460 pgid = (long)p1->p_pgrp->pg_id; 461 } 462 pgrp = pg_find(pgid, PFIND_LOCKED); 463 if (pgrp == NULL || pgrp->pg_session != p->p_session) { 464 mutex_exit(&proclist_lock); 465 return EPERM; 466 } 467 tp->t_pgrp = pgrp; 468 mutex_exit(&proclist_lock); 469 return 0; 470 471 default: 472 return EOPNOTSUPP; 473 } 474 475 SCARG(&fca, fd) = fd; 476 SCARG(&fca, cmd) = cmd; 477 SCARG(&fca, arg) = arg; 478 479 return sys_fcntl(l, &fca, retval); 480 } 481 482 #if !defined(__amd64__) 483 /* 484 * Convert a NetBSD stat structure to a Linux stat structure. 485 * Only the order of the fields and the padding in the structure 486 * is different. linux_fakedev is a machine-dependent function 487 * which optionally converts device driver major/minor numbers 488 * (XXX horrible, but what can you do against code that compares 489 * things against constant major device numbers? sigh) 490 */ 491 static void 492 bsd_to_linux_stat(bsp, lsp) 493 struct stat *bsp; 494 struct linux_stat *lsp; 495 { 496 497 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 498 lsp->lst_ino = bsp->st_ino; 499 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 500 if (bsp->st_nlink >= (1 << 15)) 501 lsp->lst_nlink = (1 << 15) - 1; 502 else 503 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 504 lsp->lst_uid = bsp->st_uid; 505 lsp->lst_gid = bsp->st_gid; 506 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 507 lsp->lst_size = bsp->st_size; 508 lsp->lst_blksize = bsp->st_blksize; 509 lsp->lst_blocks = bsp->st_blocks; 510 lsp->lst_atime = bsp->st_atime; 511 lsp->lst_mtime = bsp->st_mtime; 512 lsp->lst_ctime = bsp->st_ctime; 513 #ifdef LINUX_STAT_HAS_NSEC 514 lsp->lst_atime_nsec = bsp->st_atimensec; 515 lsp->lst_mtime_nsec = bsp->st_mtimensec; 516 lsp->lst_ctime_nsec = bsp->st_ctimensec; 517 #endif 518 } 519 520 /* 521 * The stat functions below are plain sailing. stat and lstat are handled 522 * by one function to avoid code duplication. 523 */ 524 int 525 linux_sys_fstat(l, v, retval) 526 struct lwp *l; 527 void *v; 528 register_t *retval; 529 { 530 struct linux_sys_fstat_args /* { 531 syscallarg(int) fd; 532 syscallarg(linux_stat *) sp; 533 } */ *uap = v; 534 struct linux_stat tmplst; 535 struct stat tmpst; 536 int error; 537 538 error = do_sys_fstat(l, SCARG(uap, fd), &tmpst); 539 if (error != 0) 540 return error; 541 bsd_to_linux_stat(&tmpst, &tmplst); 542 543 return copyout(&tmplst, SCARG(uap, sp), sizeof tmplst); 544 } 545 546 static int 547 linux_stat1(l, v, retval, flags) 548 struct lwp *l; 549 void *v; 550 register_t *retval; 551 int flags; 552 { 553 struct linux_stat tmplst; 554 struct stat tmpst; 555 int error; 556 struct linux_sys_stat_args *uap = v; 557 558 error = do_sys_stat(l, SCARG(uap, path), flags, &tmpst); 559 if (error != 0) 560 return error; 561 562 bsd_to_linux_stat(&tmpst, &tmplst); 563 564 return copyout(&tmplst, SCARG(uap, sp), sizeof tmplst); 565 } 566 567 int 568 linux_sys_stat(l, v, retval) 569 struct lwp *l; 570 void *v; 571 register_t *retval; 572 { 573 struct linux_sys_stat_args /* { 574 syscallarg(const char *) path; 575 syscallarg(struct linux_stat *) sp; 576 } */ *uap = v; 577 578 return linux_stat1(l, uap, retval, FOLLOW); 579 } 580 581 /* Note: this is "newlstat" in the Linux sources */ 582 /* (we don't bother with the old lstat currently) */ 583 int 584 linux_sys_lstat(l, v, retval) 585 struct lwp *l; 586 void *v; 587 register_t *retval; 588 { 589 struct linux_sys_lstat_args /* { 590 syscallarg(const char *) path; 591 syscallarg(struct linux_stat *) sp; 592 } */ *uap = v; 593 594 return linux_stat1(l, uap, retval, NOFOLLOW); 595 } 596 #endif /* !__amd64__ */ 597 598 /* 599 * The following syscalls are mostly here because of the alternate path check. 600 */ 601 int 602 linux_sys_access(l, v, retval) 603 struct lwp *l; 604 void *v; 605 register_t *retval; 606 { 607 struct linux_sys_access_args /* { 608 syscallarg(const char *) path; 609 syscallarg(int) flags; 610 } */ *uap = v; 611 612 return sys_access(l, uap, retval); 613 } 614 615 int 616 linux_sys_unlink(l, v, retval) 617 struct lwp *l; 618 void *v; 619 register_t *retval; 620 621 { 622 struct linux_sys_unlink_args /* { 623 syscallarg(const char *) path; 624 } */ *uap = v; 625 int error; 626 struct nameidata nd; 627 628 error = sys_unlink(l, uap, retval); 629 if (error != EPERM) 630 return (error); 631 632 /* 633 * Linux returns EISDIR if unlink(2) is called on a directory. 634 * We return EPERM in such cases. To emulate correct behaviour, 635 * check if the path points to directory and return EISDIR if this 636 * is the case. 637 */ 638 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, UIO_USERSPACE, 639 SCARG(uap, path), l); 640 if (namei(&nd) == 0) { 641 struct stat sb; 642 643 if (vn_stat(nd.ni_vp, &sb, l) == 0 644 && S_ISDIR(sb.st_mode)) 645 error = EISDIR; 646 647 vput(nd.ni_vp); 648 } 649 650 return (error); 651 } 652 653 int 654 linux_sys_chdir(l, v, retval) 655 struct lwp *l; 656 void *v; 657 register_t *retval; 658 { 659 struct linux_sys_chdir_args /* { 660 syscallarg(const char *) path; 661 } */ *uap = v; 662 663 return sys_chdir(l, uap, retval); 664 } 665 666 int 667 linux_sys_mknod(l, v, retval) 668 struct lwp *l; 669 void *v; 670 register_t *retval; 671 { 672 struct linux_sys_mknod_args /* { 673 syscallarg(const char *) path; 674 syscallarg(int) mode; 675 syscallarg(int) dev; 676 } */ *uap = v; 677 678 /* 679 * BSD handles FIFOs separately 680 */ 681 if (S_ISFIFO(SCARG(uap, mode))) { 682 struct sys_mkfifo_args bma; 683 684 SCARG(&bma, path) = SCARG(uap, path); 685 SCARG(&bma, mode) = SCARG(uap, mode); 686 return sys_mkfifo(l, &bma, retval); 687 } else { 688 struct sys_mknod_args bma; 689 690 SCARG(&bma, path) = SCARG(uap, path); 691 SCARG(&bma, mode) = SCARG(uap, mode); 692 /* 693 * Linux device numbers uses 8 bits for minor and 8 bits 694 * for major. Due to how we map our major and minor, 695 * this just fits into our dev_t. Just mask off the 696 * upper 16bit to remove any random junk. 697 */ 698 SCARG(&bma, dev) = SCARG(uap, dev) & 0xffff; 699 return sys_mknod(l, &bma, retval); 700 } 701 } 702 703 int 704 linux_sys_chmod(l, v, retval) 705 struct lwp *l; 706 void *v; 707 register_t *retval; 708 { 709 struct linux_sys_chmod_args /* { 710 syscallarg(const char *) path; 711 syscallarg(int) mode; 712 } */ *uap = v; 713 714 return sys_chmod(l, uap, retval); 715 } 716 717 #if defined(__i386__) || defined(__m68k__) || \ 718 defined(__arm__) 719 int 720 linux_sys_chown16(l, v, retval) 721 struct lwp *l; 722 void *v; 723 register_t *retval; 724 { 725 struct linux_sys_chown16_args /* { 726 syscallarg(const char *) path; 727 syscallarg(int) uid; 728 syscallarg(int) gid; 729 } */ *uap = v; 730 struct sys___posix_chown_args bca; 731 732 SCARG(&bca, path) = SCARG(uap, path); 733 SCARG(&bca, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 734 (uid_t)-1 : SCARG(uap, uid); 735 SCARG(&bca, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 736 (gid_t)-1 : SCARG(uap, gid); 737 738 return sys___posix_chown(l, &bca, retval); 739 } 740 741 int 742 linux_sys_fchown16(l, v, retval) 743 struct lwp *l; 744 void *v; 745 register_t *retval; 746 { 747 struct linux_sys_fchown16_args /* { 748 syscallarg(int) fd; 749 syscallarg(int) uid; 750 syscallarg(int) gid; 751 } */ *uap = v; 752 struct sys___posix_fchown_args bfa; 753 754 SCARG(&bfa, fd) = SCARG(uap, fd); 755 SCARG(&bfa, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 756 (uid_t)-1 : SCARG(uap, uid); 757 SCARG(&bfa, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 758 (gid_t)-1 : SCARG(uap, gid); 759 760 return sys___posix_fchown(l, &bfa, retval); 761 } 762 763 int 764 linux_sys_lchown16(l, v, retval) 765 struct lwp *l; 766 void *v; 767 register_t *retval; 768 { 769 struct linux_sys_lchown16_args /* { 770 syscallarg(char *) path; 771 syscallarg(int) uid; 772 syscallarg(int) gid; 773 } */ *uap = v; 774 struct sys___posix_lchown_args bla; 775 776 SCARG(&bla, path) = SCARG(uap, path); 777 SCARG(&bla, uid) = ((linux_uid_t)SCARG(uap, uid) == (linux_uid_t)-1) ? 778 (uid_t)-1 : SCARG(uap, uid); 779 SCARG(&bla, gid) = ((linux_gid_t)SCARG(uap, gid) == (linux_gid_t)-1) ? 780 (gid_t)-1 : SCARG(uap, gid); 781 782 return sys___posix_lchown(l, &bla, retval); 783 } 784 #endif /* __i386__ || __m68k__ || __arm__ || __amd64__ */ 785 #if defined (__i386__) || defined (__m68k__) || defined(__amd64__) || \ 786 defined (__powerpc__) || defined (__mips__) || defined (__arm__) 787 int 788 linux_sys_chown(l, v, retval) 789 struct lwp *l; 790 void *v; 791 register_t *retval; 792 { 793 struct linux_sys_chown_args /* { 794 syscallarg(char *) path; 795 syscallarg(int) uid; 796 syscallarg(int) gid; 797 } */ *uap = v; 798 799 return sys___posix_chown(l, uap, retval); 800 } 801 802 int 803 linux_sys_lchown(l, v, retval) 804 struct lwp *l; 805 void *v; 806 register_t *retval; 807 { 808 struct linux_sys_lchown_args /* { 809 syscallarg(char *) path; 810 syscallarg(int) uid; 811 syscallarg(int) gid; 812 } */ *uap = v; 813 814 return sys___posix_lchown(l, uap, retval); 815 } 816 #endif /* __i386__||__m68k__||__powerpc__||__mips__||__arm__ ||__amd64__ */ 817 818 int 819 linux_sys_rename(l, v, retval) 820 struct lwp *l; 821 void *v; 822 register_t *retval; 823 { 824 struct linux_sys_rename_args /* { 825 syscallarg(const char *) from; 826 syscallarg(const char *) to; 827 } */ *uap = v; 828 829 return sys___posix_rename(l, uap, retval); 830 } 831 832 int 833 linux_sys_mkdir(l, v, retval) 834 struct lwp *l; 835 void *v; 836 register_t *retval; 837 { 838 struct linux_sys_mkdir_args /* { 839 syscallarg(const char *) path; 840 syscallarg(int) mode; 841 } */ *uap = v; 842 843 return sys_mkdir(l, uap, retval); 844 } 845 846 int 847 linux_sys_rmdir(l, v, retval) 848 struct lwp *l; 849 void *v; 850 register_t *retval; 851 { 852 struct linux_sys_rmdir_args /* { 853 syscallarg(const char *) path; 854 } */ *uap = v; 855 856 return sys_rmdir(l, uap, retval); 857 } 858 859 int 860 linux_sys_symlink(l, v, retval) 861 struct lwp *l; 862 void *v; 863 register_t *retval; 864 { 865 struct linux_sys_symlink_args /* { 866 syscallarg(const char *) path; 867 syscallarg(const char *) to; 868 } */ *uap = v; 869 870 return sys_symlink(l, uap, retval); 871 } 872 873 int 874 linux_sys_link(l, v, retval) 875 struct lwp *l; 876 void *v; 877 register_t *retval; 878 { 879 struct linux_sys_link_args /* { 880 syscallarg(const char *) path; 881 syscallarg(const char *) link; 882 } */ *uap = v; 883 884 return sys_link(l, uap, retval); 885 } 886 887 int 888 linux_sys_readlink(l, v, retval) 889 struct lwp *l; 890 void *v; 891 register_t *retval; 892 { 893 struct linux_sys_readlink_args /* { 894 syscallarg(const char *) name; 895 syscallarg(char *) buf; 896 syscallarg(int) count; 897 } */ *uap = v; 898 899 return sys_readlink(l, uap, retval); 900 } 901 902 #if !defined(__amd64__) 903 int 904 linux_sys_truncate(l, v, retval) 905 struct lwp *l; 906 void *v; 907 register_t *retval; 908 { 909 struct linux_sys_truncate_args /* { 910 syscallarg(const char *) path; 911 syscallarg(long) length; 912 } */ *uap = v; 913 914 return compat_43_sys_truncate(l, uap, retval); 915 } 916 #endif /* !__amd64__ */ 917 918 /* 919 * This is just fsync() for now (just as it is in the Linux kernel) 920 * Note: this is not implemented under Linux on Alpha and Arm 921 * but should still be defined in our syscalls.master. 922 * (syscall #148 on the arm) 923 */ 924 int 925 linux_sys_fdatasync(l, v, retval) 926 struct lwp *l; 927 void *v; 928 register_t *retval; 929 { 930 #ifdef notdef 931 struct linux_sys_fdatasync_args /* { 932 syscallarg(int) fd; 933 } */ *uap = v; 934 #endif 935 return sys_fsync(l, v, retval); 936 } 937 938 /* 939 * pread(2). 940 */ 941 int 942 linux_sys_pread(l, v, retval) 943 struct lwp *l; 944 void *v; 945 register_t *retval; 946 { 947 struct linux_sys_pread_args /* { 948 syscallarg(int) fd; 949 syscallarg(void *) buf; 950 syscallarg(size_t) nbyte; 951 syscallarg(linux_off_t) offset; 952 } */ *uap = v; 953 struct sys_pread_args pra; 954 955 SCARG(&pra, fd) = SCARG(uap, fd); 956 SCARG(&pra, buf) = SCARG(uap, buf); 957 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 958 SCARG(&pra, offset) = SCARG(uap, offset); 959 960 return sys_pread(l, &pra, retval); 961 } 962 963 /* 964 * pwrite(2). 965 */ 966 int 967 linux_sys_pwrite(l, v, retval) 968 struct lwp *l; 969 void *v; 970 register_t *retval; 971 { 972 struct linux_sys_pwrite_args /* { 973 syscallarg(int) fd; 974 syscallarg(void *) buf; 975 syscallarg(size_t) nbyte; 976 syscallarg(linux_off_t) offset; 977 } */ *uap = v; 978 struct sys_pwrite_args pra; 979 980 SCARG(&pra, fd) = SCARG(uap, fd); 981 SCARG(&pra, buf) = SCARG(uap, buf); 982 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 983 SCARG(&pra, offset) = SCARG(uap, offset); 984 985 return sys_pwrite(l, &pra, retval); 986 } 987 988 #define LINUX_NOT_SUPPORTED(fun) \ 989 int \ 990 fun(struct lwp *l, void *v, register_t *retval) \ 991 { \ 992 return EOPNOTSUPP; \ 993 } 994 995 LINUX_NOT_SUPPORTED(linux_sys_setxattr) 996 LINUX_NOT_SUPPORTED(linux_sys_lsetxattr) 997 LINUX_NOT_SUPPORTED(linux_sys_fsetxattr) 998 999 LINUX_NOT_SUPPORTED(linux_sys_getxattr) 1000 LINUX_NOT_SUPPORTED(linux_sys_lgetxattr) 1001 LINUX_NOT_SUPPORTED(linux_sys_fgetxattr) 1002 1003 LINUX_NOT_SUPPORTED(linux_sys_listxattr) 1004 LINUX_NOT_SUPPORTED(linux_sys_llistxattr) 1005 LINUX_NOT_SUPPORTED(linux_sys_flistxattr) 1006 1007 LINUX_NOT_SUPPORTED(linux_sys_removexattr) 1008 LINUX_NOT_SUPPORTED(linux_sys_lremovexattr) 1009 LINUX_NOT_SUPPORTED(linux_sys_fremovexattr) 1010
Indexes created Thu Sep 25 16:09:42 GMT 2025