1 /*- 2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* udf_vnops.c */ 30 /* Take care of the vnode side of things */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/namei.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/stat.h> 38 #include <sys/bio.h> 39 #include <sys/buf.h> 40 #include <sys/mount.h> 41 #include <sys/vnode.h> 42 #include <sys/dirent.h> 43 #include <sys/queue.h> 44 #include <sys/unistd.h> 45 46 #include <vm/uma.h> 47 48 #include <fs/udf/ecma167-udf.h> 49 #include <fs/udf/osta.h> 50 #include <fs/udf/udf.h> 51 52 static int udf_access(struct vop_access_args *); 53 static int udf_getattr(struct vop_getattr_args *); 54 static int udf_ioctl(struct vop_ioctl_args *); 55 static int udf_pathconf(struct vop_pathconf_args *); 56 static int udf_read(struct vop_read_args *); 57 static int udf_readdir(struct vop_readdir_args *); 58 static int udf_readlink(struct vop_readlink_args *ap); 59 static int udf_strategy(struct vop_strategy_args *); 60 static int udf_print(struct vop_print_args *); 61 static int udf_bmap(struct vop_bmap_args *); 62 static int udf_lookup(struct vop_cachedlookup_args *); 63 static int udf_reclaim(struct vop_reclaim_args *); 64 static void udf_dumpblock(void *, int) __unused; 65 static int udf_readatoffset(struct udf_node *, int *, int, struct buf **, uint8_t **); 66 static int udf_bmap_internal(struct udf_node *, uint32_t, daddr_t *, uint32_t *); 67 68 vop_t **udf_vnodeop_p; 69 static struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 70 { &vop_default_desc, (vop_t *) vop_defaultop }, 71 { &vop_access_desc, (vop_t *) udf_access }, 72 { &vop_bmap_desc, (vop_t *) udf_bmap }, 73 { &vop_cachedlookup_desc, (vop_t *) udf_lookup }, 74 { &vop_getattr_desc, (vop_t *) udf_getattr }, 75 { &vop_ioctl_desc, (vop_t *) udf_ioctl }, 76 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 77 { &vop_pathconf_desc, (vop_t *) udf_pathconf }, 78 { &vop_print_desc, (vop_t *) udf_print }, 79 { &vop_read_desc, (vop_t *) udf_read }, 80 { &vop_readdir_desc, (vop_t *) udf_readdir }, 81 { &vop_readlink_desc, (vop_t *) udf_readlink }, 82 { &vop_reclaim_desc, (vop_t *) udf_reclaim }, 83 { &vop_strategy_desc, (vop_t *) udf_strategy }, 84 { NULL, NULL } 85 }; 86 static struct vnodeopv_desc udf_vnodeop_opv_desc = 87 { &udf_vnodeop_p, udf_vnodeop_entries }; 88 VNODEOP_SET(udf_vnodeop_opv_desc); 89 90 MALLOC_DEFINE(M_UDFFID, "UDF FID", "UDF FileId structure"); 91 MALLOC_DEFINE(M_UDFDS, "UDF DS", "UDF Dirstream structure"); 92 93 #define UDF_INVALID_BMAP -1 94 95 /* Look up a udf_node based on the ino_t passed in and return it's vnode */ 96 int 97 udf_hashlookup(struct udf_mnt *udfmp, ino_t id, int flags, struct vnode **vpp) 98 { 99 struct udf_node *node; 100 int error; 101 102 *vpp = NULL; 103 104 loop: 105 mtx_lock(&udfmp->hash_mtx); 106 TAILQ_FOREACH(node, &udfmp->udf_tqh, tq) { 107 if (node->hash_id == id) { 108 VI_LOCK(node->i_vnode); 109 mtx_unlock(&udfmp->hash_mtx); 110 error = vget(node->i_vnode, flags | LK_INTERLOCK, 111 curthread); 112 if (error == ENOENT) 113 goto loop; 114 if (error) 115 return (error); 116 *vpp = node->i_vnode; 117 return (0); 118 } 119 } 120 121 mtx_unlock(&udfmp->hash_mtx); 122 return (0); 123 } 124 125 int 126 udf_hashins(struct udf_node *node) 127 { 128 struct udf_mnt *udfmp; 129 130 udfmp = node->udfmp; 131 132 mtx_lock(&udfmp->hash_mtx); 133 TAILQ_INSERT_TAIL(&udfmp->udf_tqh, node, tq); 134 mtx_unlock(&udfmp->hash_mtx); 135 vn_lock(node->i_vnode, LK_EXCLUSIVE | LK_RETRY, curthread); 136 137 return (0); 138 } 139 140 int 141 udf_hashrem(struct udf_node *node) 142 { 143 struct udf_mnt *udfmp; 144 145 udfmp = node->udfmp; 146 147 mtx_lock(&udfmp->hash_mtx); 148 TAILQ_REMOVE(&udfmp->udf_tqh, node, tq); 149 mtx_unlock(&udfmp->hash_mtx); 150 151 return (0); 152 } 153 154 int 155 udf_allocv(struct mount *mp, struct vnode **vpp, struct thread *td) 156 { 157 int error; 158 struct vnode *vp; 159 160 error = getnewvnode("udf", mp, udf_vnodeop_p, &vp); 161 if (error) { 162 printf("udf_allocv: failed to allocate new vnode\n"); 163 return (error); 164 } 165 166 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 167 *vpp = vp; 168 return (0); 169 } 170 171 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 172 static mode_t 173 udf_permtomode(struct udf_node *node) 174 { 175 uint32_t perm; 176 uint32_t flags; 177 mode_t mode; 178 179 perm = node->fentry->perm; 180 flags = node->fentry->icbtag.flags; 181 182 mode = perm & UDF_FENTRY_PERM_USER_MASK; 183 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 184 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 185 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 186 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 187 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 188 189 return (mode); 190 } 191 192 static int 193 udf_access(struct vop_access_args *a) 194 { 195 struct vnode *vp; 196 struct udf_node *node; 197 mode_t a_mode, mode; 198 199 vp = a->a_vp; 200 node = VTON(vp); 201 a_mode = a->a_mode; 202 203 if (a_mode & VWRITE) { 204 switch (vp->v_type) { 205 case VDIR: 206 case VLNK: 207 case VREG: 208 return (EROFS); 209 /* NOT REACHED */ 210 default: 211 break; 212 } 213 } 214 215 mode = udf_permtomode(node); 216 217 return (vaccess(vp->v_type, mode, node->fentry->uid, node->fentry->gid, 218 a_mode, a->a_cred, NULL)); 219 } 220 221 static int mon_lens[2][12] = { 222 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, 223 {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} 224 }; 225 226 static int 227 udf_isaleapyear(int year) 228 { 229 int i; 230 231 i = (year % 4) ? 0 : 1; 232 i &= (year % 100) ? 1 : 0; 233 i |= (year % 400) ? 0 : 1; 234 235 return i; 236 } 237 238 /* 239 * XXX This is just a rough hack. Daylight savings isn't calculated and tv_nsec 240 * is ignored. 241 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>. 242 */ 243 static void 244 udf_timetotimespec(struct timestamp *time, struct timespec *t) 245 { 246 int i, lpyear, daysinyear; 247 union { 248 uint16_t u_tz_offset; 249 int16_t s_tz_offset; 250 } tz; 251 252 t->tv_nsec = 0; 253 254 /* DirectCD seems to like using bogus year values */ 255 if (time->year < 1970) { 256 t->tv_sec = 0; 257 return; 258 } 259 260 /* Calculate the time and day */ 261 t->tv_sec = time->second; 262 t->tv_sec += time->minute * 60; 263 t->tv_sec += time->hour * 3600; 264 t->tv_sec += time->day * 3600 * 24; 265 266 /* Calclulate the month */ 267 lpyear = udf_isaleapyear(time->year); 268 for (i = 1; i < time->month; i++) 269 t->tv_sec += mon_lens[lpyear][i] * 3600 * 24; 270 271 /* Speed up the calculation */ 272 if (time->year > 1979) 273 t->tv_sec += 315532800; 274 if (time->year > 1989) 275 t->tv_sec += 315619200; 276 if (time->year > 1999) 277 t->tv_sec += 315532800; 278 for (i = 2000; i < time->year; i++) { 279 daysinyear = udf_isaleapyear(i) + 365 ; 280 t->tv_sec += daysinyear * 3600 * 24; 281 } 282 283 /* 284 * Calculate the time zone. The timezone is 12 bit signed 2's 285 * compliment, so we gotta do some extra magic to handle it right. 286 */ 287 tz.u_tz_offset = time->type_tz; 288 tz.u_tz_offset &= 0x0fff; 289 if (tz.u_tz_offset & 0x0800) 290 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */ 291 if ((time->type_tz & 0x1000) && (tz.s_tz_offset != -2047)) 292 t->tv_sec -= tz.s_tz_offset * 60; 293 294 return; 295 } 296 297 static int 298 udf_getattr(struct vop_getattr_args *a) 299 { 300 struct vnode *vp; 301 struct udf_node *node; 302 struct vattr *vap; 303 struct file_entry *fentry; 304 struct timespec ts; 305 306 ts.tv_sec = 0; 307 308 vp = a->a_vp; 309 vap = a->a_vap; 310 node = VTON(vp); 311 fentry = node->fentry; 312 313 vap->va_fsid = dev2udev(node->i_dev); 314 vap->va_fileid = node->hash_id; 315 vap->va_mode = udf_permtomode(node); 316 vap->va_nlink = fentry->link_cnt; 317 /* 318 * XXX The spec says that -1 is valid for uid/gid and indicates an 319 * invalid uid/gid. How should this be represented? 320 */ 321 vap->va_uid = (fentry->uid == -1) ? 0 : fentry->uid; 322 vap->va_gid = (fentry->gid == -1) ? 0 : fentry->gid; 323 udf_timetotimespec(&fentry->atime, &vap->va_atime); 324 udf_timetotimespec(&fentry->mtime, &vap->va_mtime); 325 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */ 326 vap->va_rdev = 0; /* XXX */ 327 if (vp->v_type & VDIR) { 328 /* 329 * Directories that are recorded within their ICB will show 330 * as having 0 blocks recorded. Since tradition dictates 331 * that directories consume at least one logical block, 332 * make it appear so. 333 */ 334 if (fentry->logblks_rec != 0) { 335 vap->va_size = fentry->logblks_rec * node->udfmp->bsize; 336 } else { 337 vap->va_size = node->udfmp->bsize; 338 } 339 } else { 340 vap->va_size = fentry->inf_len; 341 } 342 vap->va_flags = 0; 343 vap->va_gen = 1; 344 vap->va_blocksize = node->udfmp->bsize; 345 vap->va_bytes = fentry->inf_len; 346 vap->va_type = vp->v_type; 347 vap->va_filerev = 0; /* XXX */ 348 return (0); 349 } 350 351 /* 352 * File specific ioctls. DeCSS candidate? 353 */ 354 static int 355 udf_ioctl(struct vop_ioctl_args *a) 356 { 357 printf("%s called\n", __FUNCTION__); 358 return (ENOTTY); 359 } 360 361 /* 362 * I'm not sure that this has much value in a read-only filesystem, but 363 * cd9660 has it too. 364 */ 365 static int 366 udf_pathconf(struct vop_pathconf_args *a) 367 { 368 369 switch (a->a_name) { 370 case _PC_LINK_MAX: 371 *a->a_retval = 65535; 372 return (0); 373 case _PC_NAME_MAX: 374 *a->a_retval = NAME_MAX; 375 return (0); 376 case _PC_PATH_MAX: 377 *a->a_retval = PATH_MAX; 378 return (0); 379 case _PC_NO_TRUNC: 380 *a->a_retval = 1; 381 return (0); 382 default: 383 return (EINVAL); 384 } 385 } 386 387 static int 388 udf_read(struct vop_read_args *a) 389 { 390 struct vnode *vp = a->a_vp; 391 struct uio *uio = a->a_uio; 392 struct udf_node *node = VTON(vp); 393 struct buf *bp; 394 uint8_t *data; 395 int error = 0; 396 int size, fsize, offset; 397 398 if (uio->uio_offset < 0) 399 return (EINVAL); 400 401 fsize = node->fentry->inf_len; 402 403 while (uio->uio_offset < fsize && uio->uio_resid > 0) { 404 offset = uio->uio_offset; 405 size = uio->uio_resid; 406 error = udf_readatoffset(node, &size, offset, &bp, &data); 407 if (error) 408 return (error); 409 error = uiomove(data, size, uio); 410 if (bp != NULL) 411 brelse(bp); 412 if (error) 413 break; 414 }; 415 416 return (error); 417 } 418 419 /* Convienience routine to dump a block in hex */ 420 static void 421 udf_dumpblock(void *data, int len) 422 { 423 int i, j; 424 425 for (i = 0; i < len; i++) { 426 printf("\noffset= %d: ", i); 427 for (j = 0; j < 8; j++) { 428 if (i + j == len) 429 break; 430 printf("0x%02x ", (uint8_t)((uint8_t*)(data))[i + j]); 431 } 432 i += j - 1; 433 } 434 printf("\n"); 435 } 436 437 /* 438 * Call the OSTA routines to translate the name from a CS0 dstring to a 439 * 16-bit Unicode String. Hooks need to be placed in here to translate from 440 * Unicode to the encoding that the kernel/user expects. For now, compact 441 * the encoding to 8 bits if possible. Return the length of the translated 442 * string. 443 * XXX This horribly pessimizes the 8bit case 444 */ 445 static int 446 udf_transname(char *cs0string, char *destname, int len) 447 { 448 unicode_t *transname; 449 int i, unilen = 0; 450 451 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 452 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 453 454 if ((unilen = udf_UncompressUnicode(len, cs0string, transname)) == -1) { 455 printf("udf: Unicode translation failed\n"); 456 uma_zfree(udf_zone_trans, transname); 457 return 0; 458 } 459 460 /* At this point, the name is in 16-bit Unicode. Compact it down 461 * to 8-bit 462 */ 463 for (i = 0; i < unilen ; i++) { 464 if (transname[i] & 0xff00) { 465 destname[i] = '.'; /* Fudge the 16bit chars */ 466 } else { 467 destname[i] = transname[i] & 0xff; 468 } 469 } 470 471 destname[unilen] = 0; 472 uma_zfree(udf_zone_trans, transname); 473 474 return unilen; 475 } 476 477 /* 478 * Compare a CS0 dstring with a name passed in from the VFS layer. Return 479 * 0 on a successful match, nonzero therwise. Unicode work may need to be done 480 * here also. 481 */ 482 static int 483 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen) 484 { 485 char *transname; 486 int error = 0; 487 488 /* This is overkill, but not worth creating a new zone */ 489 transname = uma_zalloc(udf_zone_trans, M_WAITOK); 490 491 cs0len = udf_transname(cs0string, transname, cs0len); 492 493 /* Easy check. If they aren't the same length, they aren't equal */ 494 if ((cs0len == 0) || (cs0len != cmplen)) 495 error = -1; 496 else 497 error = bcmp(transname, cmpname, cmplen); 498 499 uma_zfree(udf_zone_trans, transname); 500 return (error); 501 } 502 503 struct udf_uiodir { 504 struct dirent *dirent; 505 u_long *cookies; 506 int ncookies; 507 int acookies; 508 int eofflag; 509 }; 510 511 static int 512 udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie) 513 { 514 if (uiodir->cookies != NULL) { 515 if (++uiodir->acookies > uiodir->ncookies) { 516 uiodir->eofflag = 0; 517 return (-1); 518 } 519 *uiodir->cookies++ = cookie; 520 } 521 522 if (uio->uio_resid < de_size) { 523 uiodir->eofflag = 0; 524 return (-1); 525 } 526 527 return (uiomove(uiodir->dirent, de_size, uio)); 528 } 529 530 static struct udf_dirstream * 531 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp) 532 { 533 struct udf_dirstream *ds; 534 535 ds = uma_zalloc(udf_zone_ds, M_WAITOK | M_ZERO); 536 537 ds->node = node; 538 ds->offset = offset; 539 ds->udfmp = udfmp; 540 ds->fsize = fsize; 541 542 return (ds); 543 } 544 545 static struct fileid_desc * 546 udf_getfid(struct udf_dirstream *ds) 547 { 548 struct fileid_desc *fid; 549 int error, frag_size = 0, total_fid_size; 550 551 /* End of directory? */ 552 if (ds->offset + ds->off >= ds->fsize) { 553 ds->error = 0; 554 return (NULL); 555 } 556 557 /* Grab the first extent of the directory */ 558 if (ds->off == 0) { 559 ds->size = 0; 560 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 561 &ds->bp, &ds->data); 562 if (error) { 563 ds->error = error; 564 return (NULL); 565 } 566 } 567 568 /* 569 * Clean up from a previous fragmented FID. 570 * XXX Is this the right place for this? 571 */ 572 if (ds->fid_fragment && ds->buf != NULL) { 573 ds->fid_fragment = 0; 574 FREE(ds->buf, M_UDFFID); 575 } 576 577 fid = (struct fileid_desc*)&ds->data[ds->off]; 578 579 /* 580 * Check to see if the fid is fragmented. The first test 581 * ensures that we don't wander off the end of the buffer 582 * looking for the l_iu and l_fi fields. 583 */ 584 if (ds->off + UDF_FID_SIZE > ds->size || 585 ds->off + fid->l_iu + fid->l_fi + UDF_FID_SIZE > ds->size) { 586 587 /* Copy what we have of the fid into a buffer */ 588 frag_size = ds->size - ds->off; 589 if (frag_size >= ds->udfmp->bsize) { 590 printf("udf: invalid FID fragment\n"); 591 ds->error = EINVAL; 592 return (NULL); 593 } 594 595 /* 596 * File ID descriptors can only be at most one 597 * logical sector in size. 598 */ 599 MALLOC(ds->buf, uint8_t*, ds->udfmp->bsize, M_UDFFID, 600 M_WAITOK | M_ZERO); 601 bcopy(fid, ds->buf, frag_size); 602 603 /* Reduce all of the casting magic */ 604 fid = (struct fileid_desc*)ds->buf; 605 606 if (ds->bp != NULL) 607 brelse(ds->bp); 608 609 /* Fetch the next allocation */ 610 ds->offset += ds->size; 611 ds->size = 0; 612 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 613 &ds->bp, &ds->data); 614 if (error) { 615 ds->error = error; 616 return (NULL); 617 } 618 619 /* 620 * If the fragment was so small that we didn't get 621 * the l_iu and l_fi fields, copy those in. 622 */ 623 if (frag_size < UDF_FID_SIZE) 624 bcopy(ds->data, &ds->buf[frag_size], 625 UDF_FID_SIZE - frag_size); 626 627 /* 628 * Now that we have enough of the fid to work with, 629 * copy in the rest of the fid from the new 630 * allocation. 631 */ 632 total_fid_size = UDF_FID_SIZE + fid->l_iu + fid->l_fi; 633 if (total_fid_size > ds->udfmp->bsize) { 634 printf("udf: invalid FID\n"); 635 ds->error = EIO; 636 return (NULL); 637 } 638 bcopy(ds->data, &ds->buf[frag_size], 639 total_fid_size - frag_size); 640 641 ds->fid_fragment = 1; 642 } else { 643 total_fid_size = fid->l_iu + fid->l_fi + UDF_FID_SIZE; 644 } 645 646 /* 647 * Update the offset. Align on a 4 byte boundary because the 648 * UDF spec says so. 649 */ 650 ds->this_off = ds->off; 651 if (!ds->fid_fragment) { 652 ds->off += (total_fid_size + 3) & ~0x03; 653 } else { 654 ds->off = (total_fid_size - frag_size + 3) & ~0x03; 655 } 656 657 return (fid); 658 } 659 660 static void 661 udf_closedir(struct udf_dirstream *ds) 662 { 663 664 if (ds->bp != NULL) 665 brelse(ds->bp); 666 667 if (ds->fid_fragment && ds->buf != NULL) 668 FREE(ds->buf, M_UDFFID); 669 670 uma_zfree(udf_zone_ds, ds); 671 } 672 673 static int 674 udf_readdir(struct vop_readdir_args *a) 675 { 676 struct vnode *vp; 677 struct uio *uio; 678 struct dirent dir; 679 struct udf_node *node; 680 struct fileid_desc *fid; 681 struct udf_uiodir uiodir; 682 struct udf_dirstream *ds; 683 u_long *cookies = NULL; 684 int ncookies; 685 int error = 0; 686 687 vp = a->a_vp; 688 uio = a->a_uio; 689 node = VTON(vp); 690 uiodir.eofflag = 1; 691 692 if (a->a_ncookies != NULL) { 693 /* 694 * Guess how many entries are needed. If we run out, this 695 * function will be called again and thing will pick up were 696 * it left off. 697 */ 698 ncookies = uio->uio_resid / 8; 699 MALLOC(cookies, u_long *, sizeof(u_long) * ncookies, 700 M_TEMP, M_WAITOK); 701 if (cookies == NULL) 702 return (ENOMEM); 703 uiodir.ncookies = ncookies; 704 uiodir.cookies = cookies; 705 uiodir.acookies = 0; 706 } else { 707 uiodir.cookies = NULL; 708 } 709 710 /* 711 * Iterate through the file id descriptors. Give the parent dir 712 * entry special attention. 713 */ 714 ds = udf_opendir(node, uio->uio_offset, node->fentry->inf_len, 715 node->udfmp); 716 717 while ((fid = udf_getfid(ds)) != NULL) { 718 719 /* XXX Should we return an error on a bad fid? */ 720 if (udf_checktag(&fid->tag, TAGID_FID)) { 721 printf("Invalid FID tag\n"); 722 udf_dumpblock(fid, UDF_FID_SIZE); 723 error = EIO; 724 break; 725 } 726 727 /* Is this a deleted file? */ 728 if (fid->file_char & UDF_FILE_CHAR_DEL) 729 continue; 730 731 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 732 /* Do up the '.' and '..' entries. Dummy values are 733 * used for the cookies since the offset here is 734 * usually zero, and NFS doesn't like that value 735 */ 736 dir.d_fileno = node->hash_id; 737 dir.d_type = DT_DIR; 738 dir.d_name[0] = '.'; 739 dir.d_namlen = 1; 740 dir.d_reclen = GENERIC_DIRSIZ(&dir); 741 uiodir.dirent = &dir; 742 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1); 743 if (error) 744 break; 745 746 dir.d_fileno = udf_getid(&fid->icb); 747 dir.d_type = DT_DIR; 748 dir.d_name[0] = '.'; 749 dir.d_name[1] = '.'; 750 dir.d_namlen = 2; 751 dir.d_reclen = GENERIC_DIRSIZ(&dir); 752 uiodir.dirent = &dir; 753 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2); 754 } else { 755 dir.d_namlen = udf_transname(&fid->data[fid->l_iu], 756 &dir.d_name[0], fid->l_fi); 757 dir.d_fileno = udf_getid(&fid->icb); 758 dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ? 759 DT_DIR : DT_UNKNOWN; 760 dir.d_reclen = GENERIC_DIRSIZ(&dir); 761 uiodir.dirent = &dir; 762 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 763 ds->this_off); 764 } 765 if (error) { 766 printf("uiomove returned %d\n", error); 767 break; 768 } 769 770 } 771 772 /* tell the calling layer whether we need to be called again */ 773 *a->a_eofflag = uiodir.eofflag; 774 uio->uio_offset = ds->offset + ds->off; 775 776 if (!error) 777 error = ds->error; 778 779 udf_closedir(ds); 780 781 if (a->a_ncookies != NULL) { 782 if (error) 783 FREE(cookies, M_TEMP); 784 else { 785 *a->a_ncookies = uiodir.acookies; 786 *a->a_cookies = cookies; 787 } 788 } 789 790 return (error); 791 } 792 793 /* Are there any implementations out there that do soft-links? */ 794 static int 795 udf_readlink(struct vop_readlink_args *ap) 796 { 797 printf("%s called\n", __FUNCTION__); 798 return (EOPNOTSUPP); 799 } 800 801 static int 802 udf_strategy(struct vop_strategy_args *a) 803 { 804 struct buf *bp; 805 struct vnode *vp; 806 struct udf_node *node; 807 int maxsize; 808 809 bp = a->a_bp; 810 vp = bp->b_vp; 811 node = VTON(vp); 812 813 /* cd9660 has this test reversed, but it seems more logical this way */ 814 if (bp->b_blkno != bp->b_lblkno) { 815 /* 816 * Files that are embedded in the fentry don't translate well 817 * to a block number. Reject. 818 */ 819 if (udf_bmap_internal(node, bp->b_lblkno * node->udfmp->bsize, 820 &bp->b_lblkno, &maxsize)) { 821 clrbuf(bp); 822 bp->b_blkno = -1; 823 } 824 } 825 if ((long)bp->b_blkno == -1) { 826 bufdone(bp); 827 return (0); 828 } 829 vp = node->i_devvp; 830 bp->b_dev = vp->v_rdev; 831 VOP_SPECSTRATEGY(vp, bp); 832 return (0); 833 } 834 835 static int 836 udf_print(struct vop_print_args *a) 837 { 838 printf("%s called\n", __FUNCTION__); 839 return (EOPNOTSUPP); 840 } 841 842 static int 843 udf_bmap(struct vop_bmap_args *a) 844 { 845 struct udf_node *node; 846 uint32_t max_size; 847 daddr_t lsector; 848 int error; 849 850 node = VTON(a->a_vp); 851 852 if (a->a_vpp != NULL) 853 *a->a_vpp = node->i_devvp; 854 if (a->a_bnp == NULL) 855 return (0); 856 if (a->a_runb) 857 *a->a_runb = 0; 858 859 error = udf_bmap_internal(node, a->a_bn * node->udfmp->bsize, &lsector, 860 &max_size); 861 if (error) 862 return (error); 863 864 /* Translate logical to physical sector number */ 865 *a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT); 866 867 /* Punt on read-ahead for now */ 868 if (a->a_runp) 869 *a->a_runp = 0; 870 871 return (0); 872 } 873 874 /* 875 * The all powerful VOP_LOOKUP(). 876 */ 877 static int 878 udf_lookup(struct vop_cachedlookup_args *a) 879 { 880 struct vnode *dvp; 881 struct vnode *tdp = NULL; 882 struct vnode **vpp = a->a_vpp; 883 struct udf_node *node; 884 struct udf_mnt *udfmp; 885 struct fileid_desc *fid = NULL; 886 struct udf_dirstream *ds; 887 struct thread *td; 888 u_long nameiop; 889 u_long flags; 890 char *nameptr; 891 long namelen; 892 ino_t id = 0; 893 int offset, error = 0; 894 int numdirpasses, fsize; 895 896 dvp = a->a_dvp; 897 node = VTON(dvp); 898 udfmp = node->udfmp; 899 nameiop = a->a_cnp->cn_nameiop; 900 flags = a->a_cnp->cn_flags; 901 nameptr = a->a_cnp->cn_nameptr; 902 namelen = a->a_cnp->cn_namelen; 903 fsize = node->fentry->inf_len; 904 td = a->a_cnp->cn_thread; 905 906 /* 907 * If this is a LOOKUP and we've already partially searched through 908 * the directory, pick up where we left off and flag that the 909 * directory may need to be searched twice. For a full description, 910 * see /sys/isofs/cd9660/cd9660_lookup.c:cd9660_lookup() 911 */ 912 if (nameiop != LOOKUP || node->diroff == 0 || node->diroff > fsize) { 913 offset = 0; 914 numdirpasses = 1; 915 } else { 916 offset = node->diroff; 917 numdirpasses = 2; 918 nchstats.ncs_2passes++; 919 } 920 921 lookloop: 922 ds = udf_opendir(node, offset, fsize, udfmp); 923 924 while ((fid = udf_getfid(ds)) != NULL) { 925 926 /* XXX Should we return an error on a bad fid? */ 927 if (udf_checktag(&fid->tag, TAGID_FID)) { 928 printf("udf_lookup: Invalid tag\n"); 929 error = EIO; 930 break; 931 } 932 933 /* Is this a deleted file? */ 934 if (fid->file_char & UDF_FILE_CHAR_DEL) 935 continue; 936 937 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 938 if (flags & ISDOTDOT) { 939 id = udf_getid(&fid->icb); 940 break; 941 } 942 } else { 943 if (!(udf_cmpname(&fid->data[fid->l_iu], 944 nameptr, fid->l_fi, namelen))) { 945 id = udf_getid(&fid->icb); 946 break; 947 } 948 } 949 } 950 951 if (!error) 952 error = ds->error; 953 954 /* XXX Bail out here? */ 955 if (error) { 956 udf_closedir(ds); 957 return (error); 958 } 959 960 /* Did we have a match? */ 961 if (id) { 962 error = udf_vget(udfmp->im_mountp, id, LK_EXCLUSIVE, &tdp); 963 if (!error) { 964 /* 965 * Remember where this entry was if it's the final 966 * component. 967 */ 968 if ((flags & ISLASTCN) && nameiop == LOOKUP) 969 node->diroff = ds->offset + ds->off; 970 if (numdirpasses == 2) 971 nchstats.ncs_pass2++; 972 if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) { 973 a->a_cnp->cn_flags |= PDIRUNLOCK; 974 VOP_UNLOCK(dvp, 0, td); 975 } 976 977 *vpp = tdp; 978 979 /* Put this entry in the cache */ 980 if (flags & MAKEENTRY) 981 cache_enter(dvp, *vpp, a->a_cnp); 982 } 983 } else { 984 /* Name wasn't found on this pass. Do another pass? */ 985 if (numdirpasses == 2) { 986 numdirpasses--; 987 offset = 0; 988 udf_closedir(ds); 989 goto lookloop; 990 } 991 992 /* Enter name into cache as non-existant */ 993 if (flags & MAKEENTRY) 994 cache_enter(dvp, *vpp, a->a_cnp); 995 996 if ((flags & ISLASTCN) && 997 (nameiop == CREATE || nameiop == RENAME)) { 998 error = EROFS; 999 } else { 1000 error = ENOENT; 1001 } 1002 } 1003 1004 udf_closedir(ds); 1005 return (error); 1006 } 1007 1008 static int 1009 udf_reclaim(struct vop_reclaim_args *a) 1010 { 1011 struct vnode *vp; 1012 struct udf_node *unode; 1013 1014 vp = a->a_vp; 1015 unode = VTON(vp); 1016 1017 cache_purge(vp); 1018 if (unode != NULL) { 1019 udf_hashrem(unode); 1020 if (unode->i_devvp) { 1021 vrele(unode->i_devvp); 1022 unode->i_devvp = 0; 1023 } 1024 1025 if (unode->fentry != NULL) 1026 FREE(unode->fentry, M_UDFFENTRY); 1027 uma_zfree(udf_zone_node, unode); 1028 vp->v_data = NULL; 1029 } 1030 1031 return (0); 1032 } 1033 1034 /* 1035 * Read the block and then set the data pointer to correspond with the 1036 * offset passed in. Only read in at most 'size' bytes, and then set 'size' 1037 * to the number of bytes pointed to. If 'size' is zero, try to read in a 1038 * whole extent. 1039 * XXX 'size' is limited to the logical block size for now due to problems 1040 * with udf_read() 1041 */ 1042 static int 1043 udf_readatoffset(struct udf_node *node, int *size, int offset, struct buf **bp, uint8_t **data) 1044 { 1045 struct udf_mnt *udfmp; 1046 struct file_entry *fentry = NULL; 1047 struct buf *bp1; 1048 uint32_t max_size; 1049 daddr_t sector; 1050 int error; 1051 1052 udfmp = node->udfmp; 1053 1054 error = udf_bmap_internal(node, offset, §or, &max_size); 1055 if (error == UDF_INVALID_BMAP) { 1056 /* 1057 * This error means that the file *data* is stored in the 1058 * allocation descriptor field of the file entry. 1059 */ 1060 fentry = node->fentry; 1061 *data = &fentry->data[fentry->l_ea]; 1062 *size = fentry->l_ad; 1063 *bp = NULL; 1064 return (0); 1065 } else if (error != 0) { 1066 return (error); 1067 } 1068 1069 /* Adjust the size so that it is within range */ 1070 if (*size == 0 || *size > max_size) 1071 *size = max_size; 1072 *size = min(*size, MAXBSIZE); 1073 1074 if ((error = udf_readlblks(udfmp, sector, *size, bp))) { 1075 printf("udf_readlblks returned %d\n", error); 1076 return (error); 1077 } 1078 1079 bp1 = *bp; 1080 *data = (uint8_t *)&bp1->b_data[offset % udfmp->bsize]; 1081 return (0); 1082 } 1083 1084 /* 1085 * Translate a file offset into a logical block and then into a physical 1086 * block. 1087 */ 1088 static int 1089 udf_bmap_internal(struct udf_node *node, uint32_t offset, daddr_t *sector, uint32_t *max_size) 1090 { 1091 struct udf_mnt *udfmp; 1092 struct file_entry *fentry; 1093 void *icb; 1094 struct icb_tag *tag; 1095 uint32_t icblen = 0; 1096 daddr_t lsector; 1097 int ad_offset, ad_num = 0; 1098 int i, p_offset; 1099 1100 udfmp = node->udfmp; 1101 fentry = node->fentry; 1102 tag = &fentry->icbtag; 1103 1104 switch (tag->strat_type) { 1105 case 4: 1106 break; 1107 1108 case 4096: 1109 printf("Cannot deal with strategy4096 yet!\n"); 1110 return (ENODEV); 1111 1112 default: 1113 printf("Unknown strategy type %d\n", tag->strat_type); 1114 return (ENODEV); 1115 } 1116 1117 switch (tag->flags & 0x7) { 1118 case 0: 1119 /* 1120 * The allocation descriptor field is filled with short_ad's. 1121 * If the offset is beyond the current extent, look for the 1122 * next extent. 1123 */ 1124 do { 1125 offset -= icblen; 1126 ad_offset = sizeof(struct short_ad) * ad_num; 1127 if (ad_offset > fentry->l_ad) { 1128 printf("File offset out of bounds\n"); 1129 return (EINVAL); 1130 } 1131 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset); 1132 icblen = GETICBLEN(short_ad, icb); 1133 ad_num++; 1134 } while(offset >= icblen); 1135 1136 lsector = (offset >> udfmp->bshift) + 1137 ((struct short_ad *)(icb))->pos; 1138 1139 *max_size = GETICBLEN(short_ad, icb) - offset; 1140 1141 break; 1142 case 1: 1143 /* 1144 * The allocation descriptor field is filled with long_ad's 1145 * If the offset is beyond the current extent, look for the 1146 * next extent. 1147 */ 1148 do { 1149 offset -= icblen; 1150 ad_offset = sizeof(struct long_ad) * ad_num; 1151 if (ad_offset > fentry->l_ad) { 1152 printf("File offset out of bounds\n"); 1153 return (EINVAL); 1154 } 1155 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset); 1156 icblen = GETICBLEN(long_ad, icb); 1157 ad_num++; 1158 } while(offset >= icblen); 1159 1160 lsector = (offset >> udfmp->bshift) + 1161 ((struct long_ad *)(icb))->loc.lb_num; 1162 1163 *max_size = GETICBLEN(long_ad, icb) - offset; 1164 1165 break; 1166 case 3: 1167 /* 1168 * This type means that the file *data* is stored in the 1169 * allocation descriptor field of the file entry. 1170 */ 1171 *max_size = 0; 1172 *sector = node->hash_id + udfmp->part_start; 1173 1174 return (UDF_INVALID_BMAP); 1175 case 2: 1176 /* DirectCD does not use extended_ad's */ 1177 default: 1178 printf("Unsupported allocation descriptor %d\n", 1179 tag->flags & 0x7); 1180 return (ENODEV); 1181 } 1182 1183 *sector = lsector + udfmp->part_start; 1184 1185 /* 1186 * Check the sparing table. Each entry represents the beginning of 1187 * a packet. 1188 */ 1189 if (udfmp->s_table != NULL) { 1190 for (i = 0; i< udfmp->s_table_entries; i++) { 1191 p_offset = lsector - udfmp->s_table->entries[i].org; 1192 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) { 1193 *sector = udfmp->s_table->entries[i].map + 1194 p_offset; 1195 break; 1196 } 1197 } 1198 } 1199 1200 return (0); 1201 } 1202