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: src/sys/fs/udf/udf_vnops.c,v 1.33 2003/12/07 05:04:49 scottl Exp $ 27 * $DragonFly: src/sys/vfs/udf/udf_vnops.c,v 1.14 2005/08/02 13:03:55 joerg Exp $ 28 */ 29 30 /* udf_vnops.c */ 31 /* Take care of the vnode side of things */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/namei.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/stat.h> 39 #include <sys/module.h> 40 #include <sys/buf.h> 41 #include <sys/iconv.h> 42 #include <sys/mount.h> 43 #include <sys/vnode.h> 44 #include <sys/dirent.h> 45 #include <sys/queue.h> 46 #include <sys/unistd.h> 47 48 #include <machine/inttypes.h> 49 50 #include <vfs/udf/ecma167-udf.h> 51 #include <vfs/udf/osta.h> 52 #include <vfs/udf/udf.h> 53 #include <vfs/udf/udf_mount.h> 54 55 static int udf_access(struct vop_access_args *); 56 static int udf_getattr(struct vop_getattr_args *); 57 static int udf_ioctl(struct vop_ioctl_args *); 58 static int udf_pathconf(struct vop_pathconf_args *); 59 static int udf_read(struct vop_read_args *); 60 static int udf_readdir(struct vop_readdir_args *); 61 static int udf_readlink(struct vop_readlink_args *ap); 62 static int udf_strategy(struct vop_strategy_args *); 63 static int udf_bmap(struct vop_bmap_args *); 64 static int udf_lookup(struct vop_lookup_args *); 65 static int udf_reclaim(struct vop_reclaim_args *); 66 static int udf_readatoffset(struct udf_node *, int *, int, struct buf **, uint8_t **); 67 static int udf_bmap_internal(struct udf_node *, uint32_t, daddr_t *, uint32_t *); 68 69 struct vnodeopv_entry_desc udf_vnodeop_entries[] = { 70 { &vop_default_desc, vop_defaultop }, 71 { &vop_access_desc, (vnodeopv_entry_t) udf_access }, 72 { &vop_bmap_desc, (vnodeopv_entry_t) udf_bmap }, 73 { &vop_lookup_desc, (vnodeopv_entry_t) udf_lookup }, 74 { &vop_getattr_desc, (vnodeopv_entry_t) udf_getattr }, 75 { &vop_ioctl_desc, (vnodeopv_entry_t) udf_ioctl }, 76 { &vop_pathconf_desc, (vnodeopv_entry_t) udf_pathconf }, 77 { &vop_read_desc, (vnodeopv_entry_t) udf_read }, 78 { &vop_readdir_desc, (vnodeopv_entry_t) udf_readdir }, 79 { &vop_readlink_desc, (vnodeopv_entry_t) udf_readlink }, 80 { &vop_reclaim_desc, (vnodeopv_entry_t) udf_reclaim }, 81 { &vop_strategy_desc, (vnodeopv_entry_t) udf_strategy }, 82 { NULL, NULL } 83 }; 84 85 MALLOC_DEFINE(M_UDFFID, "UDF FID", "UDF FileId structure"); 86 MALLOC_DEFINE(M_UDFDS, "UDF DS", "UDF Dirstream structure"); 87 88 #define UDF_INVALID_BMAP -1 89 90 /* Look up a udf_node based on the ino_t passed in and return it's vnode */ 91 int 92 udf_hashlookup(struct udf_mnt *udfmp, ino_t id, struct vnode **vpp) 93 { 94 struct udf_node *node; 95 struct udf_hash_lh *lh; 96 struct vnode *vp; 97 lwkt_tokref hashlock; 98 99 *vpp = NULL; 100 101 lwkt_gettoken(&hashlock, &udfmp->hash_token); 102 loop: 103 lh = &udfmp->hashtbl[id % udfmp->hashsz]; 104 if (lh == NULL) { 105 lwkt_reltoken(&hashlock); 106 return(ENOENT); 107 } 108 LIST_FOREACH(node, lh, le) { 109 if (node->hash_id != id) 110 continue; 111 vp = node->i_vnode; 112 if (vget(vp, LK_EXCLUSIVE, curthread)) 113 goto loop; 114 /* 115 * We must check to see if the inode has been ripped 116 * out from under us after blocking. 117 */ 118 lh = &udfmp->hashtbl[id % udfmp->hashsz]; 119 LIST_FOREACH(node, lh, le) { 120 if (node->hash_id == id) 121 break; 122 } 123 if (node == NULL || vp != node->i_vnode) { 124 vput(vp); 125 goto loop; 126 } 127 lwkt_reltoken(&hashlock); 128 *vpp = vp; 129 return(0); 130 } 131 132 lwkt_reltoken(&hashlock); 133 return(0); 134 } 135 136 int 137 udf_hashins(struct udf_node *node) 138 { 139 struct udf_mnt *udfmp; 140 struct udf_hash_lh *lh; 141 lwkt_tokref hashlock; 142 143 udfmp = node->udfmp; 144 145 lwkt_gettoken(&hashlock, &udfmp->hash_token); 146 lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz]; 147 if (lh == NULL) 148 LIST_INIT(lh); 149 LIST_INSERT_HEAD(lh, node, le); 150 lwkt_reltoken(&hashlock); 151 152 return(0); 153 } 154 155 int 156 udf_hashrem(struct udf_node *node) 157 { 158 struct udf_mnt *udfmp; 159 struct udf_hash_lh *lh; 160 lwkt_tokref hashlock; 161 162 udfmp = node->udfmp; 163 164 lwkt_gettoken(&hashlock, &udfmp->hash_token); 165 lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz]; 166 if (lh == NULL) 167 panic("hash entry is NULL, node->hash_id= %"PRId64"\n", node->hash_id); 168 LIST_REMOVE(node, le); 169 lwkt_reltoken(&hashlock); 170 171 return(0); 172 } 173 174 int 175 udf_allocv(struct mount *mp, struct vnode **vpp) 176 { 177 int error; 178 struct vnode *vp; 179 180 error = getnewvnode(VT_UDF, mp, &vp, 0, 0); 181 if (error) { 182 printf("udf_allocv: failed to allocate new vnode\n"); 183 return(error); 184 } 185 186 *vpp = vp; 187 return(0); 188 } 189 190 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */ 191 static mode_t 192 udf_permtomode(struct udf_node *node) 193 { 194 uint32_t perm; 195 uint32_t flags; 196 mode_t mode; 197 198 perm = node->fentry->perm; 199 flags = node->fentry->icbtag.flags; 200 201 mode = perm & UDF_FENTRY_PERM_USER_MASK; 202 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2); 203 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4); 204 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4); 205 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6); 206 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8); 207 208 return(mode); 209 } 210 211 static int 212 udf_access(struct vop_access_args *a) 213 { 214 struct vnode *vp; 215 struct udf_node *node; 216 mode_t a_mode, mode, mask; 217 struct ucred *cred = a->a_cred; 218 gid_t *gp; 219 int i; 220 221 vp = a->a_vp; 222 node = VTON(vp); 223 a_mode = a->a_mode; 224 225 if (a_mode & VWRITE) { 226 switch (vp->v_type) { 227 case VDIR: 228 case VLNK: 229 case VREG: 230 return(EROFS); 231 /* NOT REACHED */ 232 default: 233 break; 234 } 235 } 236 237 mode = udf_permtomode(node); 238 239 if (cred->cr_uid == 0) 240 return(0); 241 242 mask = 0; 243 244 /* Otherwise, check the owner. */ 245 if (cred->cr_uid == node->fentry->uid) { 246 if (a_mode & VEXEC) 247 mask |= S_IXUSR; 248 if (a_mode & VREAD) 249 mask |= S_IRUSR; 250 if (a_mode & VWRITE) 251 mask |= S_IWUSR; 252 return((mode & mask) == mask ? 0 : EACCES); 253 } 254 255 /* Otherwise, check the groups. */ 256 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 257 if (node->fentry->gid == *gp) { 258 if (a_mode & VEXEC) 259 mask |= S_IXGRP; 260 if (a_mode & VREAD) 261 mask |= S_IRGRP; 262 if (a_mode & VWRITE) 263 mask |= S_IWGRP; 264 return((mode & mask) == mask ? 0 : EACCES); 265 } 266 267 /* Otherwise, check everyone else. */ 268 if (a_mode & VEXEC) 269 mask |= S_IXOTH; 270 if (a_mode & VREAD) 271 mask |= S_IROTH; 272 if (a_mode & VWRITE) 273 mask |= S_IWOTH; 274 return((mode & mask) == mask ? 0 : EACCES); 275 } 276 277 static int mon_lens[2][12] = { 278 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, 279 {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} 280 }; 281 282 static int 283 udf_isaleapyear(int year) 284 { 285 int i; 286 287 i = (year % 4) ? 0 : 1; 288 i &= (year % 100) ? 1 : 0; 289 i |= (year % 400) ? 0 : 1; 290 291 return(i); 292 } 293 294 /* 295 * XXX This is just a rough hack. Daylight savings isn't calculated and tv_nsec 296 * is ignored. 297 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>. 298 */ 299 static void 300 udf_timetotimespec(struct timestamp *time, struct timespec *t) 301 { 302 int i, lpyear, daysinyear; 303 union { 304 uint16_t u_tz_offset; 305 int16_t s_tz_offset; 306 } tz; 307 308 t->tv_nsec = 0; 309 310 /* DirectCD seems to like using bogus year values */ 311 if (time->year < 1970) { 312 t->tv_sec = 0; 313 return; 314 } 315 316 /* Calculate the time and day */ 317 t->tv_sec = time->second; 318 t->tv_sec += time->minute * 60; 319 t->tv_sec += time->hour * 3600; 320 t->tv_sec += time->day * 3600 * 24; 321 322 /* Calclulate the month */ 323 lpyear = udf_isaleapyear(time->year); 324 for (i = 1; i < time->month; i++) 325 t->tv_sec += mon_lens[lpyear][i] * 3600 * 24; 326 327 /* Speed up the calculation */ 328 if (time->year > 1979) 329 t->tv_sec += 315532800; 330 if (time->year > 1989) 331 t->tv_sec += 315619200; 332 if (time->year > 1999) 333 t->tv_sec += 315532800; 334 for (i = 2000; i < time->year; i++) { 335 daysinyear = udf_isaleapyear(i) + 365 ; 336 t->tv_sec += daysinyear * 3600 * 24; 337 } 338 339 /* 340 * Calculate the time zone. The timezone is 12 bit signed 2's 341 * compliment, so we gotta do some extra magic to handle it right. 342 */ 343 tz.u_tz_offset = time->type_tz; 344 tz.u_tz_offset &= 0x0fff; 345 if (tz.u_tz_offset & 0x0800) 346 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */ 347 if ((time->type_tz & 0x1000) && (tz.s_tz_offset != -2047)) 348 t->tv_sec -= tz.s_tz_offset * 60; 349 350 return; 351 } 352 353 static int 354 udf_getattr(struct vop_getattr_args *a) 355 { 356 struct vnode *vp; 357 struct udf_node *node; 358 struct vattr *vap; 359 struct file_entry *fentry; 360 struct timespec ts; 361 362 ts.tv_sec = 0; 363 364 vp = a->a_vp; 365 vap = a->a_vap; 366 node = VTON(vp); 367 fentry = node->fentry; 368 369 vap->va_fsid = dev2udev(node->i_dev); 370 vap->va_fileid = node->hash_id; 371 vap->va_mode = udf_permtomode(node); 372 vap->va_nlink = fentry->link_cnt; 373 /* 374 * XXX The spec says that -1 is valid for uid/gid and indicates an 375 * invalid uid/gid. How should this be represented? 376 */ 377 vap->va_uid = (fentry->uid == 0xffffffff) ? 0 : fentry->uid; 378 vap->va_gid = (fentry->gid == 0xffffffff) ? 0 : fentry->gid; 379 udf_timetotimespec(&fentry->atime, &vap->va_atime); 380 udf_timetotimespec(&fentry->mtime, &vap->va_mtime); 381 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */ 382 vap->va_rdev = 0; /* XXX */ 383 if (vp->v_type & VDIR) { 384 /* 385 * Directories that are recorded within their ICB will show 386 * as having 0 blocks recorded. Since tradition dictates 387 * that directories consume at least one logical block, 388 * make it appear so. 389 */ 390 if (fentry->logblks_rec != 0) 391 vap->va_size = fentry->logblks_rec * node->udfmp->bsize; 392 else 393 vap->va_size = node->udfmp->bsize; 394 } else 395 vap->va_size = fentry->inf_len; 396 vap->va_flags = 0; 397 vap->va_gen = 1; 398 vap->va_blocksize = node->udfmp->bsize; 399 vap->va_bytes = fentry->inf_len; 400 vap->va_type = vp->v_type; 401 vap->va_filerev = 0; /* XXX */ 402 return(0); 403 } 404 405 /* 406 * File specific ioctls. DeCSS candidate? 407 */ 408 static int 409 udf_ioctl(struct vop_ioctl_args *a) 410 { 411 printf("%s called\n", __func__); 412 return(ENOTTY); 413 } 414 415 /* 416 * I'm not sure that this has much value in a read-only filesystem, but 417 * cd9660 has it too. 418 */ 419 static int 420 udf_pathconf(struct vop_pathconf_args *a) 421 { 422 423 switch (a->a_name) { 424 case _PC_LINK_MAX: 425 *a->a_retval = 65535; 426 return(0); 427 case _PC_NAME_MAX: 428 *a->a_retval = NAME_MAX; 429 return(0); 430 case _PC_PATH_MAX: 431 *a->a_retval = PATH_MAX; 432 return(0); 433 case _PC_NO_TRUNC: 434 *a->a_retval = 1; 435 return(0); 436 default: 437 return(EINVAL); 438 } 439 } 440 441 static int 442 udf_read(struct vop_read_args *a) 443 { 444 struct vnode *vp = a->a_vp; 445 struct uio *uio = a->a_uio; 446 struct udf_node *node = VTON(vp); 447 struct buf *bp; 448 uint8_t *data; 449 int error = 0; 450 int size, fsize, offset; 451 452 if (uio->uio_offset < 0) 453 return(EINVAL); 454 455 fsize = node->fentry->inf_len; 456 457 while (uio->uio_offset < fsize && uio->uio_resid > 0) { 458 offset = uio->uio_offset; 459 size = uio->uio_resid; 460 error = udf_readatoffset(node, &size, offset, &bp, &data); 461 if (error == 0) 462 error = uiomove(data, size, uio); 463 if (bp != NULL) 464 brelse(bp); 465 if (error) 466 break; 467 } 468 469 return(error); 470 } 471 472 /* 473 * Call the OSTA routines to translate the name from a CS0 dstring to a 474 * 16-bit Unicode String. Hooks need to be placed in here to translate from 475 * Unicode to the encoding that the kernel/user expects. Return the length 476 * of the translated string. 477 */ 478 static int 479 udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp) 480 { 481 unicode_t *transname; 482 int i, unilen = 0, destlen; 483 484 /* Convert 16-bit Unicode to destname */ 485 /* allocate a buffer big enough to hold an 8->16 bit expansion */ 486 transname = malloc(MAXNAMLEN * sizeof(unicode_t), M_TEMP, M_WAITOK | M_ZERO); 487 488 if ((unilen = udf_UncompressUnicode(len, cs0string, transname)) == -1) { 489 printf("udf: Unicode translation failed\n"); 490 free(transname, M_TEMP); 491 return(0); 492 } 493 494 for (i = 0; i < unilen ; i++) 495 if (transname[i] & 0xff00) 496 destname[i] = '.'; /* Fudge the 16bit chars */ 497 else 498 destname[i] = transname[i] & 0xff; 499 free(transname, M_TEMP); 500 destname[unilen] = 0; 501 destlen = unilen; 502 503 return(destlen); 504 } 505 506 /* 507 * Compare a CS0 dstring with a name passed in from the VFS layer. Return 508 * 0 on a successful match, nonzero therwise. Unicode work may need to be done 509 * here also. 510 */ 511 static int 512 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp) 513 { 514 char *transname; 515 int error = 0; 516 517 /* This is overkill, but not worth creating a new zone */ 518 519 transname = malloc(MAXNAMLEN * sizeof(unicode_t), M_TEMP, 520 M_WAITOK | M_ZERO); 521 522 cs0len = udf_transname(cs0string, transname, cs0len, udfmp); 523 524 /* Easy check. If they aren't the same length, they aren't equal */ 525 if ((cs0len == 0) || (cs0len != cmplen)) 526 error = -1; 527 else 528 error = bcmp(transname, cmpname, cmplen); 529 530 free(transname, M_TEMP); 531 return(error); 532 } 533 534 struct udf_uiodir { 535 struct dirent *dirent; 536 u_long *cookies; 537 int ncookies; 538 int acookies; 539 int eofflag; 540 }; 541 542 static int 543 udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie) 544 { 545 if (uiodir->cookies != NULL) { 546 if (++uiodir->acookies > uiodir->ncookies) { 547 uiodir->eofflag = 0; 548 return (-1); 549 } 550 *uiodir->cookies++ = cookie; 551 } 552 553 if (uio->uio_resid < de_size) { 554 uiodir->eofflag = 0; 555 return(-1); 556 } 557 558 return(uiomove((caddr_t)uiodir->dirent, de_size, uio)); 559 } 560 561 static struct udf_dirstream * 562 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp) 563 { 564 struct udf_dirstream *ds; 565 566 ds = malloc(sizeof(*ds), M_UDFDS, M_WAITOK | M_ZERO); 567 568 ds->node = node; 569 ds->offset = offset; 570 ds->udfmp = udfmp; 571 ds->fsize = fsize; 572 573 return(ds); 574 } 575 576 static struct fileid_desc * 577 udf_getfid(struct udf_dirstream *ds) 578 { 579 struct fileid_desc *fid; 580 int error, frag_size = 0, total_fid_size; 581 582 /* End of directory? */ 583 if (ds->offset + ds->off >= ds->fsize) { 584 ds->error = 0; 585 return(NULL); 586 } 587 588 /* Grab the first extent of the directory */ 589 if (ds->off == 0) { 590 ds->size = 0; 591 if (ds->bp != NULL) 592 brelse(ds->bp); 593 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 594 &ds->bp, &ds->data); 595 if (error) { 596 ds->error = error; 597 return(NULL); 598 } 599 } 600 601 /* 602 * Clean up from a previous fragmented FID. 603 * XXX Is this the right place for this? 604 */ 605 if (ds->fid_fragment && ds->buf != NULL) { 606 ds->fid_fragment = 0; 607 free(ds->buf, M_UDFFID); 608 } 609 610 fid = (struct fileid_desc*)&ds->data[ds->off]; 611 612 /* 613 * Check to see if the fid is fragmented. The first test 614 * ensures that we don't wander off the end of the buffer 615 * looking for the l_iu and l_fi fields. 616 */ 617 if (ds->off + UDF_FID_SIZE > ds->size || 618 ds->off + fid->l_iu + fid->l_fi + UDF_FID_SIZE > ds->size) { 619 620 /* Copy what we have of the fid into a buffer */ 621 frag_size = ds->size - ds->off; 622 if (frag_size >= ds->udfmp->bsize) { 623 printf("udf: invalid FID fragment\n"); 624 ds->error = EINVAL; 625 return(NULL); 626 } 627 628 /* 629 * File ID descriptors can only be at most one 630 * logical sector in size. 631 */ 632 ds->buf = malloc(ds->udfmp->bsize, M_UDFFID, M_WAITOK | M_ZERO); 633 bcopy(fid, ds->buf, frag_size); 634 635 /* Reduce all of the casting magic */ 636 fid = (struct fileid_desc*)ds->buf; 637 638 if (ds->bp != NULL) 639 brelse(ds->bp); 640 641 /* Fetch the next allocation */ 642 ds->offset += ds->size; 643 ds->size = 0; 644 error = udf_readatoffset(ds->node, &ds->size, ds->offset, 645 &ds->bp, &ds->data); 646 if (error) { 647 ds->error = error; 648 return(NULL); 649 } 650 651 /* 652 * If the fragment was so small that we didn't get 653 * the l_iu and l_fi fields, copy those in. 654 */ 655 if (frag_size < UDF_FID_SIZE) 656 bcopy(ds->data, &ds->buf[frag_size], 657 UDF_FID_SIZE - frag_size); 658 659 /* 660 * Now that we have enough of the fid to work with, 661 * copy in the rest of the fid from the new 662 * allocation. 663 */ 664 total_fid_size = UDF_FID_SIZE + fid->l_iu + fid->l_fi; 665 if (total_fid_size > ds->udfmp->bsize) { 666 printf("udf: invalid FID\n"); 667 ds->error = EIO; 668 return(NULL); 669 } 670 bcopy(ds->data, &ds->buf[frag_size], 671 total_fid_size - frag_size); 672 673 ds->fid_fragment = 1; 674 } else 675 total_fid_size = fid->l_iu + fid->l_fi + UDF_FID_SIZE; 676 677 /* 678 * Update the offset. Align on a 4 byte boundary because the 679 * UDF spec says so. 680 */ 681 ds->this_off = ds->off; 682 if (!ds->fid_fragment) 683 ds->off += (total_fid_size + 3) & ~0x03; 684 else 685 ds->off = (total_fid_size - frag_size + 3) & ~0x03; 686 687 return(fid); 688 } 689 690 static void 691 udf_closedir(struct udf_dirstream *ds) 692 { 693 694 if (ds->bp != NULL) 695 brelse(ds->bp); 696 697 if (ds->fid_fragment && ds->buf != NULL) 698 free(ds->buf, M_UDFFID); 699 700 free(ds, M_UDFDS); 701 } 702 703 static int 704 udf_readdir(struct vop_readdir_args *a) 705 { 706 struct vnode *vp; 707 struct uio *uio; 708 struct dirent dir; 709 struct udf_node *node; 710 struct udf_mnt *udfmp; 711 struct fileid_desc *fid; 712 struct udf_uiodir uiodir; 713 struct udf_dirstream *ds; 714 u_long *cookies = NULL; 715 int ncookies; 716 int error = 0; 717 718 vp = a->a_vp; 719 uio = a->a_uio; 720 node = VTON(vp); 721 udfmp = node->udfmp; 722 uiodir.eofflag = 1; 723 724 if (a->a_ncookies != NULL) { 725 /* 726 * Guess how many entries are needed. If we run out, this 727 * function will be called again and thing will pick up were 728 * it left off. 729 */ 730 ncookies = uio->uio_resid / 8; 731 cookies = malloc(sizeof(u_long) * ncookies, M_TEMP, M_WAITOK); 732 uiodir.ncookies = ncookies; 733 uiodir.cookies = cookies; 734 uiodir.acookies = 0; 735 } else 736 uiodir.cookies = NULL; 737 738 /* 739 * Iterate through the file id descriptors. Give the parent dir 740 * entry special attention. 741 */ 742 ds = udf_opendir(node, uio->uio_offset, node->fentry->inf_len, 743 node->udfmp); 744 745 while ((fid = udf_getfid(ds)) != NULL) { 746 747 /* XXX Should we return an error on a bad fid? */ 748 if (udf_checktag(&fid->tag, TAGID_FID)) { 749 printf("Invalid FID tag\n"); 750 error = EIO; 751 break; 752 } 753 754 /* Is this a deleted file? */ 755 if (fid->file_char & UDF_FILE_CHAR_DEL) 756 continue; 757 758 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 759 /* Do up the '.' and '..' entries. Dummy values are 760 * used for the cookies since the offset here is 761 * usually zero, and NFS doesn't like that value 762 */ 763 dir.d_fileno = node->hash_id; 764 dir.d_type = DT_DIR; 765 dir.d_name[0] = '.'; 766 dir.d_namlen = 1; 767 dir.d_reclen = GENERIC_DIRSIZ(&dir); 768 uiodir.dirent = &dir; 769 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1); 770 if (error) 771 break; 772 773 dir.d_fileno = udf_getid(&fid->icb); 774 dir.d_type = DT_DIR; 775 dir.d_name[0] = '.'; 776 dir.d_name[1] = '.'; 777 dir.d_namlen = 2; 778 dir.d_reclen = GENERIC_DIRSIZ(&dir); 779 uiodir.dirent = &dir; 780 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2); 781 } else { 782 dir.d_namlen = udf_transname(&fid->data[fid->l_iu], 783 &dir.d_name[0], fid->l_fi, udfmp); 784 dir.d_fileno = udf_getid(&fid->icb); 785 dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ? 786 DT_DIR : DT_UNKNOWN; 787 dir.d_reclen = GENERIC_DIRSIZ(&dir); 788 uiodir.dirent = &dir; 789 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 790 ds->this_off); 791 } 792 if (error) { 793 printf("uiomove returned %d\n", error); 794 break; 795 } 796 797 } 798 799 /* tell the calling layer whether we need to be called again */ 800 *a->a_eofflag = uiodir.eofflag; 801 uio->uio_offset = ds->offset + ds->off; 802 803 if (!error) 804 error = ds->error; 805 806 udf_closedir(ds); 807 808 if (a->a_ncookies != NULL) { 809 if (error) 810 free(cookies, M_TEMP); 811 else { 812 *a->a_ncookies = uiodir.acookies; 813 *a->a_cookies = cookies; 814 } 815 } 816 817 return(error); 818 } 819 820 /* Are there any implementations out there that do soft-links? */ 821 static int 822 udf_readlink(struct vop_readlink_args *ap) 823 { 824 printf("%s called\n", __func__); 825 return(EOPNOTSUPP); 826 } 827 828 static int 829 udf_strategy(struct vop_strategy_args *a) 830 { 831 struct buf *bp; 832 struct vnode *vp; 833 struct udf_node *node; 834 int maxsize; 835 836 bp = a->a_bp; 837 vp = bp->b_vp; 838 node = VTON(vp); 839 840 KASSERT(a->a_vp == a->a_bp->b_vp, ("%s(%p != %p)", 841 __func__, a->a_vp, a->a_bp->b_vp)); 842 /* cd9660 has this test reversed, but it seems more logical this way */ 843 if (bp->b_blkno != bp->b_lblkno) { 844 /* 845 * Files that are embedded in the fentry don't translate well 846 * to a block number. Reject. 847 */ 848 if (udf_bmap_internal(node, bp->b_lblkno * node->udfmp->bsize, 849 &bp->b_lblkno, &maxsize)) { 850 clrbuf(bp); 851 bp->b_blkno = -1; 852 } 853 } 854 if ((long)bp->b_blkno == -1) { 855 biodone(bp); 856 return(0); 857 } 858 vp = node->i_devvp; 859 bp->b_dev = vp->v_rdev; 860 bp->b_offset = dbtob(bp->b_blkno); 861 VOP_STRATEGY(vp, bp); 862 return(0); 863 } 864 865 static int 866 udf_bmap(struct vop_bmap_args *a) 867 { 868 struct udf_node *node; 869 uint32_t max_size; 870 daddr_t lsector; 871 int error; 872 873 node = VTON(a->a_vp); 874 875 if (a->a_vpp != NULL) 876 *a->a_vpp = node->i_devvp; 877 if (a->a_bnp == NULL) 878 return(0); 879 if (a->a_runb) 880 *a->a_runb = 0; 881 882 error = udf_bmap_internal(node, a->a_bn * node->udfmp->bsize, &lsector, 883 &max_size); 884 if (error) 885 return(error); 886 887 /* Translate logical to physical sector number */ 888 *a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT); 889 890 /* Punt on read-ahead for now */ 891 if (a->a_runp) 892 *a->a_runp = 0; 893 894 return(0); 895 } 896 897 /* 898 * The all powerful VOP_LOOKUP(). 899 */ 900 static int 901 udf_lookup(struct vop_lookup_args *a) 902 { 903 struct vnode *dvp; 904 struct vnode *tdp = NULL; 905 struct vnode **vpp = a->a_vpp; 906 struct udf_node *node; 907 struct udf_mnt *udfmp; 908 struct fileid_desc *fid = NULL; 909 struct udf_dirstream *ds; 910 struct thread *td; 911 globaldata_t gd = mycpu; 912 u_long nameiop; 913 u_long flags; 914 char *nameptr; 915 long namelen; 916 ino_t id = 0; 917 int offset, error = 0; 918 int numdirpasses, fsize; 919 920 dvp = a->a_dvp; 921 node = VTON(dvp); 922 udfmp = node->udfmp; 923 nameiop = a->a_cnp->cn_nameiop; 924 flags = a->a_cnp->cn_flags; 925 nameptr = a->a_cnp->cn_nameptr; 926 namelen = a->a_cnp->cn_namelen; 927 fsize = node->fentry->inf_len; 928 td = a->a_cnp->cn_td; 929 930 /* 931 * If this is a LOOKUP and we've already partially searched through 932 * the directory, pick up where we left off and flag that the 933 * directory may need to be searched twice. For a full description, 934 * see /sys/isofs/cd9660/cd9660_lookup.c:cd9660_lookup() 935 */ 936 if (nameiop != NAMEI_LOOKUP || node->diroff == 0 || 937 node->diroff > fsize) { 938 offset = 0; 939 numdirpasses = 1; 940 } else { 941 offset = node->diroff; 942 numdirpasses = 2; 943 gd->gd_nchstats->ncs_2passes++; 944 } 945 946 lookloop: 947 ds = udf_opendir(node, offset, fsize, udfmp); 948 949 while ((fid = udf_getfid(ds)) != NULL) { 950 /* XXX Should we return an error on a bad fid? */ 951 if (udf_checktag(&fid->tag, TAGID_FID)) { 952 printf("udf_lookup: Invalid tag\n"); 953 error = EIO; 954 break; 955 } 956 957 /* Is this a deleted file? */ 958 if (fid->file_char & UDF_FILE_CHAR_DEL) 959 continue; 960 961 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) { 962 if (flags & CNP_ISDOTDOT) { 963 id = udf_getid(&fid->icb); 964 break; 965 } 966 } else { 967 if (!(udf_cmpname(&fid->data[fid->l_iu], 968 nameptr, fid->l_fi, namelen, udfmp))) { 969 id = udf_getid(&fid->icb); 970 break; 971 } 972 } 973 } 974 975 if (!error) 976 error = ds->error; 977 978 /* XXX Bail out here? */ 979 if (error) { 980 udf_closedir(ds); 981 return (error); 982 } 983 984 /* Did we have a match? */ 985 if (id) { 986 error = udf_vget(udfmp->im_mountp, id, &tdp); 987 if (!error) { 988 /* 989 * Remember where this entry was if it's the final 990 * component. 991 */ 992 if (nameiop == NAMEI_LOOKUP) 993 node->diroff = ds->offset + ds->off; 994 if (numdirpasses == 2) 995 gd->gd_nchstats->ncs_pass2++; 996 if ((flags & CNP_LOCKPARENT) == 0) { 997 a->a_cnp->cn_flags |= CNP_PDIRUNLOCK; 998 VOP_UNLOCK(dvp, 0, td); 999 } 1000 1001 *vpp = tdp; 1002 } 1003 } else { 1004 /* Name wasn't found on this pass. Do another pass? */ 1005 if (numdirpasses == 2) { 1006 numdirpasses--; 1007 offset = 0; 1008 udf_closedir(ds); 1009 goto lookloop; 1010 } 1011 if (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME) { 1012 error = EROFS; 1013 } else { 1014 error = ENOENT; 1015 } 1016 } 1017 1018 udf_closedir(ds); 1019 return(error); 1020 } 1021 1022 static int 1023 udf_reclaim(struct vop_reclaim_args *a) 1024 { 1025 struct vnode *vp; 1026 struct udf_node *unode; 1027 1028 vp = a->a_vp; 1029 unode = VTON(vp); 1030 1031 if (unode != NULL) { 1032 udf_hashrem(unode); 1033 if (unode->i_devvp) { 1034 vrele(unode->i_devvp); 1035 unode->i_devvp = 0; 1036 } 1037 1038 if (unode->fentry != NULL) 1039 free(unode->fentry, M_UDFFENTRY); 1040 free(unode, M_UDFNODE); 1041 vp->v_data = NULL; 1042 } 1043 1044 return(0); 1045 } 1046 1047 /* 1048 * Read the block and then set the data pointer to correspond with the 1049 * offset passed in. Only read in at most 'size' bytes, and then set 'size' 1050 * to the number of bytes pointed to. If 'size' is zero, try to read in a 1051 * whole extent. 1052 * 1053 * Note that *bp may be assigned error or not. 1054 * 1055 * XXX 'size' is limited to the logical block size for now due to problems 1056 * with udf_read() 1057 */ 1058 static int 1059 udf_readatoffset(struct udf_node *node, int *size, int offset, struct buf **bp, 1060 uint8_t **data) 1061 { 1062 struct udf_mnt *udfmp; 1063 struct file_entry *fentry = NULL; 1064 struct buf *bp1; 1065 uint32_t max_size; 1066 daddr_t sector; 1067 int error; 1068 1069 udfmp = node->udfmp; 1070 1071 *bp = NULL; 1072 error = udf_bmap_internal(node, offset, §or, &max_size); 1073 if (error == UDF_INVALID_BMAP) { 1074 /* 1075 * This error means that the file *data* is stored in the 1076 * allocation descriptor field of the file entry. 1077 */ 1078 fentry = node->fentry; 1079 *data = &fentry->data[fentry->l_ea]; 1080 *size = fentry->l_ad; 1081 return(0); 1082 } else if (error != 0) { 1083 return(error); 1084 } 1085 1086 /* Adjust the size so that it is within range */ 1087 if (*size == 0 || *size > max_size) 1088 *size = max_size; 1089 *size = min(*size, MAXBSIZE); 1090 1091 if ((error = udf_readlblks(udfmp, sector, *size, bp))) { 1092 printf("warning: udf_readlblks returned error %d\n", error); 1093 /* note: *bp may be non-NULL */ 1094 return(error); 1095 } 1096 1097 bp1 = *bp; 1098 *data = (uint8_t *)&bp1->b_data[offset % udfmp->bsize]; 1099 return(0); 1100 } 1101 1102 /* 1103 * Translate a file offset into a logical block and then into a physical 1104 * block. 1105 */ 1106 static int 1107 udf_bmap_internal(struct udf_node *node, uint32_t offset, daddr_t *sector, uint32_t *max_size) 1108 { 1109 struct udf_mnt *udfmp; 1110 struct file_entry *fentry; 1111 void *icb; 1112 struct icb_tag *tag; 1113 uint32_t icblen = 0; 1114 daddr_t lsector; 1115 int ad_offset, ad_num = 0; 1116 int i, p_offset; 1117 1118 udfmp = node->udfmp; 1119 fentry = node->fentry; 1120 tag = &fentry->icbtag; 1121 1122 switch (tag->strat_type) { 1123 case 4: 1124 break; 1125 1126 case 4096: 1127 printf("Cannot deal with strategy4096 yet!\n"); 1128 return(ENODEV); 1129 1130 default: 1131 printf("Unknown strategy type %d\n", tag->strat_type); 1132 return(ENODEV); 1133 } 1134 1135 switch (tag->flags & 0x7) { 1136 case 0: 1137 /* 1138 * The allocation descriptor field is filled with short_ad's. 1139 * If the offset is beyond the current extent, look for the 1140 * next extent. 1141 */ 1142 do { 1143 offset -= icblen; 1144 ad_offset = sizeof(struct short_ad) * ad_num; 1145 if (ad_offset > fentry->l_ad) { 1146 printf("File offset out of bounds\n"); 1147 return(EINVAL); 1148 } 1149 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset); 1150 icblen = GETICBLEN(short_ad, icb); 1151 ad_num++; 1152 } while(offset >= icblen); 1153 1154 lsector = (offset >> udfmp->bshift) + 1155 ((struct short_ad *)(icb))->pos; 1156 1157 *max_size = GETICBLEN(short_ad, icb); 1158 1159 break; 1160 case 1: 1161 /* 1162 * The allocation descriptor field is filled with long_ad's 1163 * If the offset is beyond the current extent, look for the 1164 * next extent. 1165 */ 1166 do { 1167 offset -= icblen; 1168 ad_offset = sizeof(struct long_ad) * ad_num; 1169 if (ad_offset > fentry->l_ad) { 1170 printf("File offset out of bounds\n"); 1171 return(EINVAL); 1172 } 1173 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset); 1174 icblen = GETICBLEN(long_ad, icb); 1175 ad_num++; 1176 } while(offset >= icblen); 1177 1178 lsector = (offset >> udfmp->bshift) + 1179 ((struct long_ad *)(icb))->loc.lb_num; 1180 1181 *max_size = GETICBLEN(long_ad, icb); 1182 1183 break; 1184 case 3: 1185 /* 1186 * This type means that the file *data* is stored in the 1187 * allocation descriptor field of the file entry. 1188 */ 1189 *max_size = 0; 1190 *sector = node->hash_id + udfmp->part_start; 1191 1192 return(UDF_INVALID_BMAP); 1193 case 2: 1194 /* DirectCD does not use extended_ad's */ 1195 default: 1196 printf("Unsupported allocation descriptor %d\n", 1197 tag->flags & 0x7); 1198 return(ENODEV); 1199 } 1200 1201 *sector = lsector + udfmp->part_start; 1202 1203 /* 1204 * Check the sparing table. Each entry represents the beginning of 1205 * a packet. 1206 */ 1207 if (udfmp->s_table != NULL) { 1208 for (i = 0; i< udfmp->s_table_entries; i++) { 1209 p_offset = lsector - udfmp->s_table->entries[i].org; 1210 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) { 1211 *sector = udfmp->s_table->entries[i].map + 1212 p_offset; 1213 break; 1214 } 1215 } 1216 } 1217 1218 return(0); 1219 } 1220