1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 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 University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95 39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vnops.c,v 1.62 1999/12/15 23:01:51 eivind Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/proc.h> 45 #include <sys/namei.h> 46 #include <sys/kernel.h> 47 #include <sys/stat.h> 48 #include <sys/buf.h> 49 #include <sys/mount.h> 50 #include <sys/vnode.h> 51 #include <vfs/fifofs/fifo.h> 52 #include <sys/malloc.h> 53 #include <sys/dirent.h> 54 #include <sys/unistd.h> 55 #include <sys/filio.h> 56 #include <sys/lockf.h> 57 #include <sys/objcache.h> 58 59 #include <vm/vm.h> 60 #include <vm/vnode_pager.h> 61 62 #include <sys/buf2.h> 63 64 #include "iso.h" 65 #include "cd9660_node.h" 66 #include "iso_rrip.h" 67 68 static int cd9660_access (struct vop_access_args *); 69 static int cd9660_advlock (struct vop_advlock_args *); 70 static int cd9660_getattr (struct vop_getattr_args *); 71 static int cd9660_ioctl (struct vop_ioctl_args *); 72 static int cd9660_pathconf (struct vop_pathconf_args *); 73 static int cd9660_open (struct vop_open_args *); 74 static int cd9660_read (struct vop_read_args *); 75 static int cd9660_setattr (struct vop_setattr_args *); 76 struct isoreaddir; 77 static int iso_uiodir (struct isoreaddir *idp, struct dirent *dp, 78 off_t off); 79 static int iso_shipdir (struct isoreaddir *idp); 80 static int cd9660_readdir (struct vop_readdir_args *); 81 static int cd9660_readlink (struct vop_readlink_args *ap); 82 static int cd9660_strategy (struct vop_strategy_args *); 83 static int cd9660_print (struct vop_print_args *); 84 85 /* 86 * Setattr call. Only allowed for block and character special devices. 87 * 88 * cd9660_setattr(struct vnode *a_vp, struct vattr *a_vap, 89 * struct ucred *a_cred, struct proc *a_p) 90 */ 91 int 92 cd9660_setattr(struct vop_setattr_args *ap) 93 { 94 struct vnode *vp = ap->a_vp; 95 struct vattr *vap = ap->a_vap; 96 97 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 98 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 99 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 100 return (EROFS); 101 if (vap->va_size != (u_quad_t)VNOVAL) { 102 switch (vp->v_type) { 103 case VDIR: 104 return (EISDIR); 105 case VLNK: 106 case VREG: 107 case VDATABASE: 108 return (EROFS); 109 case VCHR: 110 case VBLK: 111 case VSOCK: 112 case VFIFO: 113 default: 114 return (0); 115 } 116 } 117 return (0); 118 } 119 120 /* 121 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 122 * The mode is shifted to select the owner/group/other fields. The 123 * super user is granted all permissions. 124 * 125 * cd9660_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 126 * struct proc *a_p) 127 */ 128 /* ARGSUSED */ 129 static int 130 cd9660_access(struct vop_access_args *ap) 131 { 132 struct vnode *vp = ap->a_vp; 133 struct iso_node *ip = VTOI(vp); 134 135 KKASSERT(vp->v_mount->mnt_flag & MNT_RDONLY); 136 return (vop_helper_access(ap, ip->inode.iso_uid, ip->inode.iso_gid, 137 ip->inode.iso_mode, 0)); 138 } 139 140 /* 141 * cd9660_getattr(struct vnode *a_vp, struct vattr *a_vap) 142 */ 143 static int 144 cd9660_getattr(struct vop_getattr_args *ap) 145 { 146 struct vnode *vp = ap->a_vp; 147 struct vattr *vap = ap->a_vap; 148 struct iso_node *ip = VTOI(vp); 149 150 vap->va_fsid = dev2udev(ip->i_dev); 151 vap->va_fileid = ip->i_number; 152 153 vap->va_mode = ip->inode.iso_mode; 154 vap->va_nlink = ip->inode.iso_links; 155 vap->va_uid = ip->inode.iso_uid; 156 vap->va_gid = ip->inode.iso_gid; 157 vap->va_atime = ip->inode.iso_atime; 158 vap->va_mtime = ip->inode.iso_mtime; 159 vap->va_ctime = ip->inode.iso_ctime; 160 vap->va_rmajor = umajor(ip->inode.iso_rdev); 161 vap->va_rminor = uminor(ip->inode.iso_rdev); 162 163 vap->va_size = (u_quad_t)(unsigned long)ip->i_size; 164 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 165 struct vop_readlink_args rdlnk; 166 struct iovec aiov; 167 struct uio auio; 168 char *cp; 169 170 cp = kmalloc(MAXPATHLEN, M_TEMP, M_WAITOK); 171 aiov.iov_base = cp; 172 aiov.iov_len = MAXPATHLEN; 173 auio.uio_iov = &aiov; 174 auio.uio_iovcnt = 1; 175 auio.uio_offset = 0; 176 auio.uio_rw = UIO_READ; 177 auio.uio_segflg = UIO_SYSSPACE; 178 auio.uio_td = curthread; 179 auio.uio_resid = MAXPATHLEN; 180 rdlnk.a_uio = &auio; 181 rdlnk.a_vp = ap->a_vp; 182 rdlnk.a_cred = proc0.p_ucred; /* use root cred */ 183 if (cd9660_readlink(&rdlnk) == 0) 184 vap->va_size = MAXPATHLEN - auio.uio_resid; 185 kfree(cp, M_TEMP); 186 } 187 vap->va_flags = 0; 188 vap->va_gen = 1; 189 vap->va_blocksize = ip->i_mnt->logical_block_size; 190 vap->va_bytes = (u_quad_t) ip->i_size; 191 vap->va_type = vp->v_type; 192 vap->va_filerev = 0; 193 return (0); 194 } 195 196 /* 197 * Vnode op for ioctl. 198 * 199 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, 200 * int a_fflag, struct ucred *a_cred, struct proc *a_p) 201 */ 202 static int 203 cd9660_ioctl(struct vop_ioctl_args *ap) 204 { 205 struct vnode *vp = ap->a_vp; 206 struct iso_node *ip = VTOI(vp); 207 208 switch (ap->a_command) { 209 210 case FIOGETLBA: 211 *(int *)(ap->a_data) = ip->iso_start; 212 return 0; 213 default: 214 return (ENOTTY); 215 } 216 } 217 218 /* 219 * open is called when the kernel intends to read or memory map a vnode. 220 */ 221 static int 222 cd9660_open(struct vop_open_args *ap) 223 { 224 return(vop_stdopen(ap)); 225 } 226 227 /* 228 * Vnode op for reading. 229 * 230 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 231 * struct ucred *a_cred) 232 */ 233 static int 234 cd9660_read(struct vop_read_args *ap) 235 { 236 struct vnode *vp = ap->a_vp; 237 struct uio *uio = ap->a_uio; 238 struct iso_node *ip = VTOI(vp); 239 struct iso_mnt *imp; 240 struct buf *bp; 241 daddr_t lbn, rablock; 242 off_t raoffset; 243 off_t loffset; 244 off_t diff; 245 int rasize, error = 0; 246 int seqcount; 247 long size, n, on; 248 249 seqcount = ap->a_ioflag >> 16; 250 251 if (uio->uio_resid == 0) 252 return (0); 253 if (uio->uio_offset < 0) 254 return (EINVAL); 255 ip->i_flag |= IN_ACCESS; 256 imp = ip->i_mnt; 257 do { 258 lbn = lblkno(imp, uio->uio_offset); 259 loffset = lblktooff(imp, lbn); 260 on = blkoff(imp, uio->uio_offset); 261 n = szmin((u_int)(imp->logical_block_size - on), 262 uio->uio_resid); 263 diff = (off_t)ip->i_size - uio->uio_offset; 264 if (diff <= 0) 265 return (0); 266 if (diff < n) 267 n = diff; 268 size = blksize(imp, ip, lbn); 269 rablock = lbn + 1; 270 raoffset = lblktooff(imp, rablock); 271 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 272 if (raoffset < ip->i_size) { 273 error = cluster_read(vp, (off_t)ip->i_size, 274 loffset, size, 275 uio->uio_resid, 276 (ap->a_ioflag >> 16) * 277 BKVASIZE, 278 &bp); 279 } else { 280 error = bread(vp, loffset, size, &bp); 281 } 282 } else { 283 if (seqcount > 1 && 284 lblktosize(imp, rablock) < ip->i_size) { 285 rasize = blksize(imp, ip, rablock); 286 error = breadn(vp, loffset, size, &raoffset, 287 &rasize, 1, &bp); 288 } else 289 error = bread(vp, loffset, size, &bp); 290 } 291 n = imin(n, size - bp->b_resid); 292 if (error) { 293 brelse(bp); 294 return (error); 295 } 296 297 error = uiomove(bp->b_data + on, (int)n, uio); 298 brelse(bp); 299 } while (error == 0 && uio->uio_resid > 0 && n != 0); 300 return (error); 301 } 302 303 /* struct dirent + enough space for the maximum supported size */ 304 struct iso_dirent { 305 struct dirent de; 306 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)]; 307 }; 308 309 /* 310 * Structure for reading directories 311 */ 312 struct isoreaddir { 313 struct iso_dirent saveent; 314 struct iso_dirent assocent; 315 struct iso_dirent current; 316 off_t saveoff; 317 off_t assocoff; 318 off_t curroff; 319 struct uio *uio; 320 off_t uio_off; 321 int eofflag; 322 off_t *cookies; 323 int ncookies; 324 }; 325 326 int 327 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 328 { 329 int error; 330 331 dp->d_name[dp->d_namlen] = 0; 332 333 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) { 334 idp->eofflag = 0; 335 return (-1); 336 } 337 338 if (idp->cookies) { 339 if (idp->ncookies <= 0) { 340 idp->eofflag = 0; 341 return (-1); 342 } 343 344 *idp->cookies++ = off; 345 --idp->ncookies; 346 } 347 348 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0) 349 return (error); 350 idp->uio_off = off; 351 return (0); 352 } 353 354 int 355 iso_shipdir(struct isoreaddir *idp) 356 { 357 struct dirent *dp; 358 int cl, sl, assoc; 359 int error; 360 char *cname, *sname; 361 362 cl = idp->current.de.d_namlen; 363 cname = idp->current.de.d_name; 364 assoc = (cl > 1) && (*cname == ASSOCCHAR); 365 if (assoc) { 366 cl--; 367 cname++; 368 } 369 370 dp = &idp->saveent.de; 371 sname = dp->d_name; 372 if (!(sl = dp->d_namlen)) { 373 dp = &idp->assocent.de; 374 sname = dp->d_name + 1; 375 sl = dp->d_namlen - 1; 376 } 377 if (sl > 0) { 378 if (sl != cl 379 || bcmp(sname,cname,sl)) { 380 if (idp->assocent.de.d_namlen) { 381 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0) 382 return (error); 383 idp->assocent.de.d_namlen = 0; 384 } 385 if (idp->saveent.de.d_namlen) { 386 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0) 387 return (error); 388 idp->saveent.de.d_namlen = 0; 389 } 390 } 391 } 392 if (assoc) { 393 idp->assocoff = idp->curroff; 394 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de)); 395 } else { 396 idp->saveoff = idp->curroff; 397 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de)); 398 } 399 return (0); 400 } 401 402 /* 403 * Vnode op for readdir 404 * 405 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 406 * int *a_eofflag, int *a_ncookies, off_t *a_cookies) 407 */ 408 static int 409 cd9660_readdir(struct vop_readdir_args *ap) 410 { 411 struct uio *uio = ap->a_uio; 412 struct isoreaddir *idp; 413 struct vnode *vdp = ap->a_vp; 414 struct iso_node *dp; 415 struct iso_mnt *imp; 416 struct buf *bp = NULL; 417 struct iso_directory_record *ep; 418 int entryoffsetinblock; 419 doff_t endsearch; 420 u_long bmask; 421 int error = 0; 422 int reclen; 423 u_short namelen; 424 int ncookies = 0; 425 off_t *cookies = NULL; 426 427 dp = VTOI(vdp); 428 imp = dp->i_mnt; 429 bmask = imp->im_bmask; 430 431 if ((error = vn_lock(vdp, LK_EXCLUSIVE|LK_RETRY)) != 0) 432 return (error); 433 434 idp = kmalloc(sizeof(*idp), M_TEMP, M_WAITOK); 435 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0; 436 /* 437 * XXX 438 * Is it worth trying to figure out the type? 439 */ 440 idp->saveent.de.d_type = DT_UNKNOWN; 441 idp->assocent.de.d_type = DT_UNKNOWN; 442 idp->current.de.d_type = DT_UNKNOWN; 443 idp->uio = uio; 444 if (ap->a_ncookies == NULL) { 445 idp->cookies = NULL; 446 } else { 447 /* 448 * Guess the number of cookies needed. Guess at least 449 * 1 to avoid a degenerate case in malloc, and cap at 450 * a reasonable limit. 451 */ 452 ncookies = uio->uio_resid / 16 + 1; 453 if (ncookies > 1024) 454 ncookies = 1024; 455 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 456 idp->cookies = cookies; 457 idp->ncookies = ncookies; 458 } 459 idp->eofflag = 1; 460 idp->curroff = uio->uio_offset; 461 462 if ((entryoffsetinblock = idp->curroff & bmask) && 463 (error = cd9660_devblkatoff(vdp, idp->curroff, NULL, &bp))) { 464 kfree(idp, M_TEMP); 465 goto done; 466 } 467 endsearch = dp->i_size; 468 469 while (idp->curroff < endsearch) { 470 /* 471 * If offset is on a block boundary, 472 * read the next directory block. 473 * Release previous if it exists. 474 */ 475 if ((idp->curroff & bmask) == 0) { 476 if (bp != NULL) 477 brelse(bp); 478 if ((error = 479 cd9660_devblkatoff(vdp, idp->curroff, NULL, &bp)) != 0) 480 break; 481 entryoffsetinblock = 0; 482 } 483 /* 484 * Get pointer to next entry. 485 */ 486 ep = (struct iso_directory_record *) 487 ((char *)bp->b_data + entryoffsetinblock); 488 489 reclen = isonum_711(ep->length); 490 if (reclen == 0) { 491 /* skip to next block, if any */ 492 idp->curroff = 493 (idp->curroff & ~bmask) + imp->logical_block_size; 494 continue; 495 } 496 497 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 498 error = EINVAL; 499 /* illegal entry, stop */ 500 break; 501 } 502 503 if (entryoffsetinblock + reclen > imp->logical_block_size) { 504 error = EINVAL; 505 /* illegal directory, so stop looking */ 506 break; 507 } 508 509 idp->current.de.d_namlen = isonum_711(ep->name_len); 510 511 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) { 512 error = EINVAL; 513 /* illegal entry, stop */ 514 break; 515 } 516 517 if (isonum_711(ep->flags)&2) 518 idp->current.de.d_ino = isodirino(ep, imp); 519 else 520 idp->current.de.d_ino = bp->b_bio1.bio_offset + 521 entryoffsetinblock; 522 523 idp->curroff += reclen; 524 525 switch (imp->iso_ftype) { 526 case ISO_FTYPE_RRIP: 527 { 528 ino_t cur_fileno = idp->current.de.d_ino; 529 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen, 530 &cur_fileno,imp); 531 idp->current.de.d_ino = cur_fileno; 532 idp->current.de.d_namlen = namelen; 533 if (idp->current.de.d_namlen) 534 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 535 break; 536 } 537 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 538 strcpy(idp->current.de.d_name,".."); 539 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) { 540 idp->current.de.d_namlen = 1; 541 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 542 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) { 543 idp->current.de.d_namlen = 2; 544 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 545 } else { 546 isofntrans(ep->name,idp->current.de.d_namlen, 547 idp->current.de.d_name, &namelen, 548 imp->iso_ftype == ISO_FTYPE_9660, 549 isonum_711(ep->flags)&4, 550 imp->joliet_level, 551 imp->im_flags, 552 imp->im_d2l); 553 idp->current.de.d_namlen = namelen; 554 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 555 error = iso_shipdir(idp); 556 else 557 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 558 } 559 } 560 if (error) 561 break; 562 563 entryoffsetinblock += reclen; 564 } 565 566 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 567 idp->current.de.d_namlen = 0; 568 error = iso_shipdir(idp); 569 } 570 if (error < 0) 571 error = 0; 572 573 if (ap->a_ncookies != NULL) { 574 if (error) 575 kfree(cookies, M_TEMP); 576 else { 577 /* 578 * Work out the number of cookies actually used. 579 */ 580 *ap->a_ncookies = ncookies - idp->ncookies; 581 *ap->a_cookies = cookies; 582 } 583 } 584 585 if (bp) 586 brelse (bp); 587 588 uio->uio_offset = idp->uio_off; 589 *ap->a_eofflag = idp->eofflag; 590 591 kfree(idp, M_TEMP); 592 593 done: 594 vn_unlock(vdp); 595 return (error); 596 } 597 598 /* 599 * Return target name of a symbolic link 600 * Shouldn't we get the parent vnode and read the data from there? 601 * This could eventually result in deadlocks in cd9660_lookup. 602 * But otherwise the block read here is in the block buffer two times. 603 */ 604 typedef struct iso_directory_record ISODIR; 605 typedef struct iso_node ISONODE; 606 typedef struct iso_mnt ISOMNT; 607 /* 608 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 609 */ 610 static int 611 cd9660_readlink(struct vop_readlink_args *ap) 612 { 613 ISONODE *ip; 614 ISODIR *dirp; 615 ISOMNT *imp; 616 struct buf *bp; 617 struct uio *uio; 618 u_short symlen; 619 int error; 620 char *symname; 621 622 ip = VTOI(ap->a_vp); 623 imp = ip->i_mnt; 624 uio = ap->a_uio; 625 626 if (imp->iso_ftype != ISO_FTYPE_RRIP) 627 return (EINVAL); 628 629 /* 630 * Get parents directory record block that this inode included. 631 */ 632 error = bread(imp->im_devvp, 633 (off_t)ip->i_number & ~((1 << imp->im_bshift) - 1), 634 imp->logical_block_size, &bp); 635 if (error) { 636 brelse(bp); 637 return (EINVAL); 638 } 639 640 /* 641 * Setup the directory pointer for this inode 642 */ 643 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 644 645 /* 646 * Just make sure, we have a right one.... 647 * 1: Check not cross boundary on block 648 */ 649 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 650 > (unsigned)imp->logical_block_size) { 651 brelse(bp); 652 return (EINVAL); 653 } 654 655 /* 656 * Now get a buffer 657 * Abuse a namei buffer for now. 658 */ 659 if (uio->uio_segflg == UIO_SYSSPACE) 660 symname = uio->uio_iov->iov_base; 661 else 662 symname = objcache_get(namei_oc, M_WAITOK); 663 664 /* 665 * Ok, we just gathering a symbolic name in SL record. 666 */ 667 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 668 if (uio->uio_segflg != UIO_SYSSPACE) 669 objcache_put(namei_oc, symname); 670 brelse(bp); 671 return (EINVAL); 672 } 673 /* 674 * Don't forget before you leave from home ;-) 675 */ 676 brelse(bp); 677 678 /* 679 * return with the symbolic name to caller's. 680 */ 681 if (uio->uio_segflg != UIO_SYSSPACE) { 682 error = uiomove(symname, symlen, uio); 683 objcache_put(namei_oc, symname); 684 return (error); 685 } 686 uio->uio_resid -= symlen; 687 uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + symlen; 688 uio->uio_iov->iov_len -= symlen; 689 return (0); 690 } 691 692 /* 693 * Calculate the logical to physical mapping if not done already, 694 * then call the device strategy routine. 695 * 696 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio) 697 */ 698 static int 699 cd9660_strategy(struct vop_strategy_args *ap) 700 { 701 struct bio *bio = ap->a_bio; 702 struct bio *nbio; 703 struct buf *bp = bio->bio_buf; 704 struct vnode *vp = ap->a_vp; 705 struct iso_node *ip; 706 int error; 707 708 ip = VTOI(vp); 709 if (vp->v_type == VBLK || vp->v_type == VCHR) 710 panic("cd9660_strategy: spec"); 711 nbio = push_bio(bio); 712 if (nbio->bio_offset == NOOFFSET) { 713 error = VOP_BMAP(vp, bio->bio_offset, 714 &nbio->bio_offset, NULL, NULL, bp->b_cmd); 715 if (error) { 716 bp->b_error = error; 717 bp->b_flags |= B_ERROR; 718 /* I/O was never started on nbio, must biodone(bio) */ 719 biodone(bio); 720 return (error); 721 } 722 if (nbio->bio_offset == NOOFFSET) 723 clrbuf(bp); 724 } 725 if (nbio->bio_offset == NOOFFSET) { 726 /* I/O was never started on nbio, must biodone(bio) */ 727 biodone(bio); 728 return (0); 729 } 730 vp = ip->i_devvp; 731 vn_strategy(vp, nbio); 732 return (0); 733 } 734 735 /* 736 * Print out the contents of an inode. 737 * 738 * cd9660_print(struct vnode *a_vp) 739 */ 740 static int 741 cd9660_print(struct vop_print_args *ap) 742 { 743 kprintf("tag VT_ISOFS, isofs vnode\n"); 744 return (0); 745 } 746 747 /* 748 * Return POSIX pathconf information applicable to cd9660 filesystems. 749 * 750 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 751 */ 752 static int 753 cd9660_pathconf(struct vop_pathconf_args *ap) 754 { 755 switch (ap->a_name) { 756 case _PC_LINK_MAX: 757 *ap->a_retval = 1; 758 return (0); 759 case _PC_NAME_MAX: 760 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 761 *ap->a_retval = NAME_MAX; 762 else 763 *ap->a_retval = 37; 764 return (0); 765 case _PC_PATH_MAX: 766 *ap->a_retval = PATH_MAX; 767 return (0); 768 case _PC_PIPE_BUF: 769 *ap->a_retval = PIPE_BUF; 770 return (0); 771 case _PC_CHOWN_RESTRICTED: 772 *ap->a_retval = 1; 773 return (0); 774 case _PC_NO_TRUNC: 775 *ap->a_retval = 1; 776 return (0); 777 default: 778 return (EINVAL); 779 } 780 /* NOTREACHED */ 781 } 782 783 /* 784 * Advisory lock support 785 */ 786 static int 787 cd9660_advlock(struct vop_advlock_args *ap) 788 { 789 struct iso_node *ip = VTOI(ap->a_vp); 790 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 791 } 792 793 794 /* 795 * Global vfs data structures for cd9660 796 */ 797 struct vop_ops cd9660_vnode_vops = { 798 .vop_default = vop_defaultop, 799 .vop_open = cd9660_open, 800 .vop_access = cd9660_access, 801 .vop_advlock = cd9660_advlock, 802 .vop_bmap = cd9660_bmap, 803 .vop_old_lookup = cd9660_lookup, 804 .vop_getattr = cd9660_getattr, 805 .vop_inactive = cd9660_inactive, 806 .vop_ioctl = cd9660_ioctl, 807 .vop_pathconf = cd9660_pathconf, 808 .vop_print = cd9660_print, 809 .vop_read = cd9660_read, 810 .vop_readdir = cd9660_readdir, 811 .vop_readlink = cd9660_readlink, 812 .vop_reclaim = cd9660_reclaim, 813 .vop_setattr = cd9660_setattr, 814 .vop_strategy = cd9660_strategy, 815 .vop_getpages = vop_stdgetpages, 816 .vop_putpages = vop_stdputpages 817 }; 818 819 /* 820 * Special device vnode ops 821 */ 822 struct vop_ops cd9660_spec_vops = { 823 .vop_default = vop_defaultop, 824 .vop_read = vop_stdnoread, 825 .vop_access = cd9660_access, 826 .vop_getattr = cd9660_getattr, 827 .vop_inactive = cd9660_inactive, 828 .vop_print = cd9660_print, 829 .vop_reclaim = cd9660_reclaim, 830 .vop_setattr = cd9660_setattr, 831 }; 832 833 struct vop_ops cd9660_fifo_vops = { 834 .vop_default = fifo_vnoperate, 835 .vop_access = cd9660_access, 836 .vop_getattr = cd9660_getattr, 837 .vop_inactive = cd9660_inactive, 838 .vop_print = cd9660_print, 839 .vop_reclaim = cd9660_reclaim, 840 .vop_setattr = cd9660_setattr, 841 }; 842 843