udf_readwrite.c revision 1.6
1 /* $NetBSD: udf_readwrite.c,v 1.6 2008/07/28 19:41:13 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 2007, 2008 Reinoud Zandijk 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __KERNEL_RCSID(0, "$NetBSD: udf_readwrite.c,v 1.6 2008/07/28 19:41:13 reinoud Exp $"); 32 #endif /* not lint */ 33 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_quota.h" 37 #include "opt_compat_netbsd.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/sysctl.h> 43 #include <sys/namei.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/vnode.h> 47 #include <miscfs/genfs/genfs_node.h> 48 #include <sys/mount.h> 49 #include <sys/buf.h> 50 #include <sys/file.h> 51 #include <sys/device.h> 52 #include <sys/disklabel.h> 53 #include <sys/ioctl.h> 54 #include <sys/malloc.h> 55 #include <sys/dirent.h> 56 #include <sys/stat.h> 57 #include <sys/conf.h> 58 #include <sys/kauth.h> 59 #include <sys/kthread.h> 60 #include <dev/clock_subr.h> 61 62 #include <fs/udf/ecma167-udf.h> 63 #include <fs/udf/udf_mount.h> 64 65 #if defined(_KERNEL_OPT) 66 #include "opt_udf.h" 67 #endif 68 69 #include "udf.h" 70 #include "udf_subr.h" 71 #include "udf_bswap.h" 72 73 74 #define VTOI(vnode) ((struct udf_node *) vnode->v_data) 75 76 /* --------------------------------------------------------------------- */ 77 78 void 79 udf_fixup_fid_block(uint8_t *blob, int lb_size, 80 int rfix_pos, int max_rfix_pos, uint32_t lb_num) 81 { 82 struct fileid_desc *fid; 83 uint8_t *fid_pos; 84 int fid_len, found; 85 86 /* needs to be word aligned */ 87 KASSERT(rfix_pos % 4 == 0); 88 89 /* first resync with the FID stream !!! */ 90 found = 0; 91 while (rfix_pos + sizeof(struct desc_tag) <= max_rfix_pos) { 92 fid_pos = blob + rfix_pos; 93 fid = (struct fileid_desc *) fid_pos; 94 if (udf_rw16(fid->tag.id) == TAGID_FID) { 95 if (udf_check_tag((union dscrptr *) fid) == 0) 96 found = 1; 97 } 98 if (found) 99 break; 100 /* try next location; can only be 4 bytes aligned */ 101 rfix_pos += 4; 102 } 103 104 /* walk over the fids */ 105 fid_pos = blob + rfix_pos; 106 while (rfix_pos + sizeof(struct desc_tag) <= max_rfix_pos) { 107 fid = (struct fileid_desc *) fid_pos; 108 if (udf_rw16(fid->tag.id) != TAGID_FID) { 109 /* end of FID stream; end of directory or currupted */ 110 break; 111 } 112 113 /* update sector number and recalculate checkum */ 114 fid->tag.tag_loc = udf_rw32(lb_num); 115 udf_validate_tag_sum((union dscrptr *) fid); 116 117 /* if the FID crosses the memory, we're done! */ 118 if (rfix_pos + UDF_FID_SIZE >= max_rfix_pos) 119 break; 120 121 fid_len = udf_fidsize(fid); 122 fid_pos += fid_len; 123 rfix_pos += fid_len; 124 } 125 } 126 127 128 void 129 udf_fixup_internal_extattr(uint8_t *blob, uint32_t lb_num) 130 { 131 struct desc_tag *tag; 132 struct file_entry *fe; 133 struct extfile_entry *efe; 134 struct extattrhdr_desc *eahdr; 135 int l_ea; 136 137 /* get information from fe/efe */ 138 tag = (struct desc_tag *) blob; 139 switch (udf_rw16(tag->id)) { 140 case TAGID_FENTRY : 141 fe = (struct file_entry *) blob; 142 l_ea = udf_rw32(fe->l_ea); 143 eahdr = (struct extattrhdr_desc *) fe->data; 144 break; 145 case TAGID_EXTFENTRY : 146 efe = (struct extfile_entry *) blob; 147 l_ea = udf_rw32(efe->l_ea); 148 eahdr = (struct extattrhdr_desc *) efe->data; 149 break; 150 case TAGID_INDIRECTENTRY : 151 case TAGID_ALLOCEXTENT : 152 case TAGID_EXTATTR_HDR : 153 return; 154 default: 155 panic("%s: passed bad tag\n", __func__); 156 } 157 158 /* something recorded here? (why am i called?) */ 159 if (l_ea == 0) 160 return; 161 162 #if 0 163 /* check extended attribute tag */ 164 /* TODO XXX what to do when we encounter an error here? */ 165 error = udf_check_tag(eahdr); 166 if (error) 167 return; /* for now */ 168 if (udf_rw16(eahdr->tag.id) != TAGID_EXTATTR_HDR) 169 return; /* for now */ 170 error = udf_check_tag_payload(eahdr, sizeof(struct extattrhdr_desc)); 171 if (error) 172 return; /* for now */ 173 #endif 174 175 DPRINTF(EXTATTR, ("node fixup: found %d bytes of extended attributes\n", 176 l_ea)); 177 178 /* fixup eahdr tag */ 179 eahdr->tag.tag_loc = udf_rw32(lb_num); 180 udf_validate_tag_and_crc_sums((union dscrptr *) eahdr); 181 } 182 183 184 void 185 udf_fixup_node_internals(struct udf_mount *ump, uint8_t *blob, int udf_c_type) 186 { 187 struct desc_tag *tag, *sbm_tag; 188 struct file_entry *fe; 189 struct extfile_entry *efe; 190 struct alloc_ext_entry *ext; 191 uint32_t lb_size, lb_num; 192 uint32_t rfid_pos, max_rfid_pos; 193 int icbflags, addr_type, file_type, has_fids, has_sbm, l_ea; 194 195 lb_size = udf_rw32(ump->logical_vol->lb_size); 196 /* if its not a node we're done */ 197 if (udf_c_type != UDF_C_NODE) 198 return; 199 200 /* NOTE this could also be done in write_internal */ 201 /* start of a descriptor */ 202 l_ea = 0; 203 has_fids = 0; 204 has_sbm = 0; 205 max_rfid_pos = rfid_pos = lb_num = 0; /* shut up gcc! */ 206 207 tag = (struct desc_tag *) blob; 208 switch (udf_rw16(tag->id)) { 209 case TAGID_FENTRY : 210 fe = (struct file_entry *) tag; 211 l_ea = udf_rw32(fe->l_ea); 212 icbflags = udf_rw16(fe->icbtag.flags); 213 addr_type = (icbflags & UDF_ICB_TAG_FLAGS_ALLOC_MASK); 214 file_type = fe->icbtag.file_type; 215 has_fids = (addr_type == UDF_ICB_INTERN_ALLOC); 216 has_sbm = (file_type == UDF_ICB_FILETYPE_META_BITMAP); 217 rfid_pos = UDF_FENTRY_SIZE + l_ea; 218 max_rfid_pos = rfid_pos + udf_rw64(fe->inf_len); 219 lb_num = udf_rw32(fe->tag.tag_loc); 220 break; 221 case TAGID_EXTFENTRY : 222 efe = (struct extfile_entry *) tag; 223 l_ea = udf_rw32(efe->l_ea); 224 icbflags = udf_rw16(efe->icbtag.flags); 225 addr_type = (icbflags & UDF_ICB_TAG_FLAGS_ALLOC_MASK); 226 file_type = efe->icbtag.file_type; 227 has_fids = (addr_type == UDF_ICB_INTERN_ALLOC); 228 has_sbm = (file_type == UDF_ICB_FILETYPE_META_BITMAP); 229 rfid_pos = UDF_EXTFENTRY_SIZE + l_ea; 230 max_rfid_pos = rfid_pos + udf_rw64(efe->inf_len); 231 lb_num = udf_rw32(efe->tag.tag_loc); 232 break; 233 case TAGID_INDIRECTENTRY : 234 case TAGID_EXTATTR_HDR : 235 break; 236 case TAGID_ALLOCEXTENT : 237 /* force crclen to 8 for UDF version < 2.01 */ 238 ext = (struct alloc_ext_entry *) tag; 239 if (udf_rw16(ump->logvol_info->min_udf_readver) <= 0x200) 240 ext->tag.desc_crc_len = udf_rw16(8); 241 break; 242 default: 243 panic("%s: passed bad tag\n", __func__); 244 break; 245 } 246 247 /* fixup internal extended attributes if present */ 248 if (l_ea) 249 udf_fixup_internal_extattr(blob, lb_num); 250 251 if (has_fids) 252 udf_fixup_fid_block(blob, lb_size, rfid_pos, 253 max_rfid_pos, lb_num); 254 255 if (has_sbm) { 256 sbm_tag = (struct desc_tag *) (blob + rfid_pos); 257 sbm_tag->tag_loc = tag->tag_loc; 258 udf_validate_tag_and_crc_sums((uint8_t *) sbm_tag); 259 } 260 261 udf_validate_tag_and_crc_sums(blob); 262 } 263 264 /* --------------------------------------------------------------------- */ 265 266 /* 267 * Set of generic descriptor readers and writers and their helper functions. 268 * Descriptors inside `logical space' i.e. inside logically mapped partitions 269 * can never be longer than one logical sector. 270 * 271 * NOTE that these functions *can* be used by the sheduler backends to read 272 * node descriptors too. 273 * 274 * For reading, the size of allocated piece is returned in multiple of sector 275 * size due to udf_calc_udf_malloc_size(). 276 */ 277 278 279 /* SYNC reading of n blocks from specified sector */ 280 /* NOTE only used by udf_read_phys_dscr */ 281 static int 282 udf_read_phys_sectors(struct udf_mount *ump, int what, void *blob, 283 uint32_t start, uint32_t sectors) 284 { 285 struct buf *buf, *nestbuf; 286 uint32_t buf_offset; 287 off_t lblkno, rblkno; 288 int sector_size = ump->discinfo.sector_size; 289 int blks = sector_size / DEV_BSIZE; 290 int piece; 291 int error; 292 293 DPRINTF(READ, ("udf_intbreadn() : sectors = %d, sector_size = %d\n", 294 sectors, sector_size)); 295 buf = getiobuf(ump->devvp, true); 296 buf->b_flags = B_READ; 297 buf->b_cflags = BC_BUSY; /* needed? */ 298 buf->b_iodone = NULL; 299 buf->b_data = blob; 300 buf->b_bcount = sectors * sector_size; 301 buf->b_resid = buf->b_bcount; 302 buf->b_bufsize = buf->b_bcount; 303 buf->b_private = NULL; /* not needed yet */ 304 BIO_SETPRIO(buf, BPRIO_DEFAULT); 305 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = start * blks; 306 buf->b_proc = NULL; 307 308 error = 0; 309 buf_offset = 0; 310 rblkno = start; 311 lblkno = 0; 312 while ((sectors > 0) && (error == 0)) { 313 piece = MIN(MAXPHYS/sector_size, sectors); 314 DPRINTF(READ, ("read in %d + %d\n", (uint32_t) rblkno, piece)); 315 316 nestbuf = getiobuf(NULL, true); 317 nestiobuf_setup(buf, nestbuf, buf_offset, piece * sector_size); 318 /* nestbuf is B_ASYNC */ 319 320 /* identify this nestbuf */ 321 nestbuf->b_lblkno = lblkno; 322 323 /* CD shedules on raw blkno */ 324 nestbuf->b_blkno = rblkno * blks; 325 nestbuf->b_proc = NULL; 326 nestbuf->b_rawblkno = rblkno * blks; 327 nestbuf->b_udf_c_type = what; 328 329 udf_discstrat_queuebuf(ump, nestbuf); 330 331 lblkno += piece; 332 rblkno += piece; 333 buf_offset += piece * sector_size; 334 sectors -= piece; 335 } 336 error = biowait(buf); 337 putiobuf(buf); 338 339 return error; 340 } 341 342 343 /* synchronous generic descriptor read */ 344 int 345 udf_read_phys_dscr(struct udf_mount *ump, uint32_t sector, 346 struct malloc_type *mtype, union dscrptr **dstp) 347 { 348 union dscrptr *dst, *new_dst; 349 uint8_t *pos; 350 int sectors, dscrlen; 351 int i, error, sector_size; 352 353 sector_size = ump->discinfo.sector_size; 354 355 *dstp = dst = NULL; 356 dscrlen = sector_size; 357 358 /* read initial piece */ 359 dst = malloc(sector_size, mtype, M_WAITOK); 360 error = udf_read_phys_sectors(ump, UDF_C_DSCR, dst, sector, 1); 361 DPRINTFIF(DESCRIPTOR, error, ("read error (%d)\n", error)); 362 363 if (!error) { 364 /* check if its a valid tag */ 365 error = udf_check_tag(dst); 366 if (error) { 367 /* check if its an empty block */ 368 pos = (uint8_t *) dst; 369 for (i = 0; i < sector_size; i++, pos++) { 370 if (*pos) break; 371 } 372 if (i == sector_size) { 373 /* return no error but with no dscrptr */ 374 /* dispose first block */ 375 free(dst, mtype); 376 return 0; 377 } 378 } 379 /* calculate descriptor size */ 380 dscrlen = udf_tagsize(dst, sector_size); 381 } 382 DPRINTFIF(DESCRIPTOR, error, ("bad tag checksum\n")); 383 384 if (!error && (dscrlen > sector_size)) { 385 DPRINTF(DESCRIPTOR, ("multi block descriptor read\n")); 386 /* 387 * Read the rest of descriptor. Since it is only used at mount 388 * time its overdone to define and use a specific udf_intbreadn 389 * for this alone. 390 */ 391 392 new_dst = realloc(dst, dscrlen, mtype, M_WAITOK); 393 if (new_dst == NULL) { 394 free(dst, mtype); 395 return ENOMEM; 396 } 397 dst = new_dst; 398 399 sectors = (dscrlen + sector_size -1) / sector_size; 400 DPRINTF(DESCRIPTOR, ("dscrlen = %d (%d blk)\n", dscrlen, sectors)); 401 402 pos = (uint8_t *) dst + sector_size; 403 error = udf_read_phys_sectors(ump, UDF_C_DSCR, pos, 404 sector + 1, sectors-1); 405 406 DPRINTFIF(DESCRIPTOR, error, ("read error on multi (%d)\n", 407 error)); 408 } 409 if (!error) { 410 error = udf_check_tag_payload(dst, dscrlen); 411 DPRINTFIF(DESCRIPTOR, error, ("bad payload check sum\n")); 412 } 413 if (error && dst) { 414 free(dst, mtype); 415 dst = NULL; 416 } 417 *dstp = dst; 418 419 return error; 420 } 421 422 423 static void 424 udf_write_phys_buf(struct udf_mount *ump, int what, struct buf *buf) 425 { 426 struct buf *nestbuf; 427 uint32_t buf_offset; 428 off_t lblkno, rblkno; 429 int sector_size = ump->discinfo.sector_size; 430 int blks = sector_size / DEV_BSIZE; 431 uint32_t sectors; 432 int piece; 433 int error; 434 435 sectors = buf->b_bcount / sector_size; 436 DPRINTF(WRITE, ("udf_intbwriten() : sectors = %d, sector_size = %d\n", 437 sectors, sector_size)); 438 439 /* don't forget to increase pending count for the bwrite itself */ 440 /* panic("NO WRITING\n"); */ 441 if (buf->b_vp) { 442 mutex_enter(&buf->b_vp->v_interlock); 443 buf->b_vp->v_numoutput++; 444 mutex_exit(&buf->b_vp->v_interlock); 445 } 446 447 error = 0; 448 buf_offset = 0; 449 rblkno = buf->b_blkno / blks; 450 lblkno = 0; 451 while ((sectors > 0) && (error == 0)) { 452 piece = MIN(MAXPHYS/sector_size, sectors); 453 DPRINTF(WRITE, ("write out %d + %d\n", 454 (uint32_t) rblkno, piece)); 455 456 nestbuf = getiobuf(NULL, true); 457 nestiobuf_setup(buf, nestbuf, buf_offset, piece * sector_size); 458 /* nestbuf is B_ASYNC */ 459 460 /* identify this nestbuf */ 461 nestbuf->b_lblkno = lblkno; 462 463 /* CD shedules on raw blkno */ 464 nestbuf->b_blkno = rblkno * blks; 465 nestbuf->b_proc = NULL; 466 nestbuf->b_rawblkno = rblkno * blks; 467 nestbuf->b_udf_c_type = what; 468 469 udf_discstrat_queuebuf(ump, nestbuf); 470 471 lblkno += piece; 472 rblkno += piece; 473 buf_offset += piece * sector_size; 474 sectors -= piece; 475 } 476 } 477 478 479 /* synchronous generic descriptor write */ 480 int 481 udf_write_phys_dscr_sync(struct udf_mount *ump, struct udf_node *udf_node, int what, 482 union dscrptr *dscr, uint32_t sector, uint32_t logsector) 483 { 484 struct vnode *vp; 485 struct buf *buf; 486 int sector_size = ump->discinfo.sector_size; 487 int blks = sector_size / DEV_BSIZE; 488 int dscrlen; 489 int error; 490 491 /* set sector number in the descriptor and validate */ 492 dscr->tag.tag_loc = udf_rw32(logsector); 493 udf_validate_tag_and_crc_sums(dscr); 494 495 /* calculate descriptor size */ 496 dscrlen = udf_tagsize(dscr, sector_size); 497 498 /* get transfer buffer */ 499 vp = udf_node ? udf_node->vnode : ump->devvp; 500 buf = getiobuf(vp, true); 501 buf->b_flags = B_WRITE; 502 buf->b_cflags = BC_BUSY; /* needed? */ 503 buf->b_iodone = NULL; 504 buf->b_data = (void *) dscr; 505 buf->b_bcount = dscrlen; 506 buf->b_resid = buf->b_bcount; 507 buf->b_bufsize = buf->b_bcount; 508 buf->b_private = NULL; /* not needed yet */ 509 BIO_SETPRIO(buf, BPRIO_DEFAULT); 510 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = sector * blks; 511 buf->b_proc = NULL; 512 513 /* do the write, wait and return error */ 514 udf_write_phys_buf(ump, what, buf); 515 error = biowait(buf); 516 putiobuf(buf); 517 518 return error; 519 } 520 521 522 /* asynchronous generic descriptor write */ 523 int 524 udf_write_phys_dscr_async(struct udf_mount *ump, struct udf_node *udf_node, 525 int what, union dscrptr *dscr, 526 uint32_t sector, uint32_t logsector, 527 void (*dscrwr_callback)(struct buf *)) 528 { 529 struct vnode *vp; 530 struct buf *buf; 531 int dscrlen; 532 int sector_size = ump->discinfo.sector_size; 533 int blks = sector_size / DEV_BSIZE; 534 535 KASSERT(dscrwr_callback); 536 DPRINTF(NODE, ("udf_write_phys_dscr_async() called\n")); 537 538 /* set sector number in the descriptor and validate */ 539 dscr->tag.tag_loc = udf_rw32(logsector); 540 udf_validate_tag_and_crc_sums(dscr); 541 542 /* calculate descriptor size */ 543 dscrlen = udf_tagsize(dscr, sector_size); 544 545 /* get transfer buffer */ 546 vp = udf_node ? udf_node->vnode : ump->devvp; 547 buf = getiobuf(vp, true); 548 buf->b_flags = B_WRITE; // | B_ASYNC; 549 buf->b_cflags = BC_BUSY; 550 buf->b_iodone = dscrwr_callback; 551 buf->b_data = dscr; 552 buf->b_bcount = dscrlen; 553 buf->b_resid = buf->b_bcount; 554 buf->b_bufsize = buf->b_bcount; 555 buf->b_private = NULL; /* not needed yet */ 556 BIO_SETPRIO(buf, BPRIO_DEFAULT); 557 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = sector * blks; 558 buf->b_proc = NULL; 559 560 /* do the write and return no error */ 561 udf_write_phys_buf(ump, what, buf); 562 return 0; 563 } 564 565 /* --------------------------------------------------------------------- */ 566 567 /* disc strategy dispatchers */ 568 569 int 570 udf_create_logvol_dscr(struct udf_mount *ump, struct udf_node *udf_node, struct long_ad *icb, 571 union dscrptr **dscrptr) 572 { 573 struct udf_strategy *strategy = ump->strategy; 574 struct udf_strat_args args; 575 int error; 576 577 KASSERT(strategy); 578 args.ump = ump; 579 args.udf_node = udf_node; 580 args.icb = icb; 581 args.dscr = NULL; 582 583 error = (strategy->create_logvol_dscr)(&args); 584 *dscrptr = args.dscr; 585 586 return error; 587 } 588 589 590 void 591 udf_free_logvol_dscr(struct udf_mount *ump, struct long_ad *icb, 592 void *dscr) 593 { 594 struct udf_strategy *strategy = ump->strategy; 595 struct udf_strat_args args; 596 597 KASSERT(strategy); 598 args.ump = ump; 599 args.icb = icb; 600 args.dscr = dscr; 601 602 (strategy->free_logvol_dscr)(&args); 603 } 604 605 606 int 607 udf_read_logvol_dscr(struct udf_mount *ump, struct long_ad *icb, 608 union dscrptr **dscrptr) 609 { 610 struct udf_strategy *strategy = ump->strategy; 611 struct udf_strat_args args; 612 int error; 613 614 KASSERT(strategy); 615 args.ump = ump; 616 args.icb = icb; 617 args.dscr = NULL; 618 619 error = (strategy->read_logvol_dscr)(&args); 620 *dscrptr = args.dscr; 621 622 return error; 623 } 624 625 626 int 627 udf_write_logvol_dscr(struct udf_node *udf_node, union dscrptr *dscr, 628 struct long_ad *icb, int waitfor) 629 { 630 struct udf_strategy *strategy = udf_node->ump->strategy; 631 struct udf_strat_args args; 632 int error; 633 634 KASSERT(strategy); 635 args.ump = udf_node->ump; 636 args.udf_node = udf_node; 637 args.icb = icb; 638 args.dscr = dscr; 639 args.waitfor = waitfor; 640 641 error = (strategy->write_logvol_dscr)(&args); 642 return error; 643 } 644 645 646 void 647 udf_discstrat_queuebuf(struct udf_mount *ump, struct buf *nestbuf) 648 { 649 struct udf_strategy *strategy = ump->strategy; 650 struct udf_strat_args args; 651 652 KASSERT(strategy); 653 args.ump = ump; 654 args.nestbuf = nestbuf; 655 656 (strategy->queuebuf)(&args); 657 } 658 659 660 void 661 udf_discstrat_init(struct udf_mount *ump) 662 { 663 struct udf_strategy *strategy = ump->strategy; 664 struct udf_strat_args args; 665 666 KASSERT(strategy); 667 args.ump = ump; 668 (strategy->discstrat_init)(&args); 669 } 670 671 672 void udf_discstrat_finish(struct udf_mount *ump) 673 { 674 struct udf_strategy *strategy = ump->strategy; 675 struct udf_strat_args args; 676 677 /* strategy might not have been set, so ignore if not set */ 678 if (strategy) { 679 args.ump = ump; 680 (strategy->discstrat_finish)(&args); 681 } 682 } 683 684 /* --------------------------------------------------------------------- */ 685 686
Indexes created Mon Sep 22 13:09:51 GMT 2025