udf_readwrite.c revision 1.8.4.1
1 /* $NetBSD: udf_readwrite.c,v 1.8.4.1 2009/02/18 00:51:27 snj 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 1.8.4.1 2009/02/18 00:51:27 snj 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 #include "udf.h" 66 #include "udf_subr.h" 67 #include "udf_bswap.h" 68 69 70 #define VTOI(vnode) ((struct udf_node *) vnode->v_data) 71 72 /* --------------------------------------------------------------------- */ 73 74 void 75 udf_fixup_fid_block(uint8_t *blob, int lb_size, 76 int rfix_pos, int max_rfix_pos, uint32_t lb_num) 77 { 78 struct fileid_desc *fid; 79 uint8_t *fid_pos; 80 int fid_len, found; 81 82 /* needs to be word aligned */ 83 KASSERT(rfix_pos % 4 == 0); 84 85 /* first resync with the FID stream !!! */ 86 found = 0; 87 while (rfix_pos + sizeof(struct desc_tag) <= max_rfix_pos) { 88 fid_pos = blob + rfix_pos; 89 fid = (struct fileid_desc *) fid_pos; 90 if (udf_rw16(fid->tag.id) == TAGID_FID) { 91 if (udf_check_tag((union dscrptr *) fid) == 0) 92 found = 1; 93 } 94 if (found) 95 break; 96 /* try next location; can only be 4 bytes aligned */ 97 rfix_pos += 4; 98 } 99 100 /* walk over the fids */ 101 fid_pos = blob + rfix_pos; 102 while (rfix_pos + sizeof(struct desc_tag) <= max_rfix_pos) { 103 fid = (struct fileid_desc *) fid_pos; 104 if (udf_rw16(fid->tag.id) != TAGID_FID) { 105 /* end of FID stream; end of directory or currupted */ 106 break; 107 } 108 109 /* update sector number and recalculate checkum */ 110 fid->tag.tag_loc = udf_rw32(lb_num); 111 udf_validate_tag_sum((union dscrptr *) fid); 112 113 /* if the FID crosses the memory, we're done! */ 114 if (rfix_pos + UDF_FID_SIZE >= max_rfix_pos) 115 break; 116 117 fid_len = udf_fidsize(fid); 118 fid_pos += fid_len; 119 rfix_pos += fid_len; 120 } 121 } 122 123 124 void 125 udf_fixup_internal_extattr(uint8_t *blob, uint32_t lb_num) 126 { 127 struct desc_tag *tag; 128 struct file_entry *fe; 129 struct extfile_entry *efe; 130 struct extattrhdr_desc *eahdr; 131 int l_ea; 132 133 /* get information from fe/efe */ 134 tag = (struct desc_tag *) blob; 135 switch (udf_rw16(tag->id)) { 136 case TAGID_FENTRY : 137 fe = (struct file_entry *) blob; 138 l_ea = udf_rw32(fe->l_ea); 139 eahdr = (struct extattrhdr_desc *) fe->data; 140 break; 141 case TAGID_EXTFENTRY : 142 efe = (struct extfile_entry *) blob; 143 l_ea = udf_rw32(efe->l_ea); 144 eahdr = (struct extattrhdr_desc *) efe->data; 145 break; 146 case TAGID_INDIRECTENTRY : 147 case TAGID_ALLOCEXTENT : 148 case TAGID_EXTATTR_HDR : 149 return; 150 default: 151 panic("%s: passed bad tag\n", __func__); 152 } 153 154 /* something recorded here? (why am i called?) */ 155 if (l_ea == 0) 156 return; 157 158 #if 0 159 /* check extended attribute tag */ 160 /* TODO XXX what to do when we encounter an error here? */ 161 error = udf_check_tag(eahdr); 162 if (error) 163 return; /* for now */ 164 if (udf_rw16(eahdr->tag.id) != TAGID_EXTATTR_HDR) 165 return; /* for now */ 166 error = udf_check_tag_payload(eahdr, sizeof(struct extattrhdr_desc)); 167 if (error) 168 return; /* for now */ 169 #endif 170 171 DPRINTF(EXTATTR, ("node fixup: found %d bytes of extended attributes\n", 172 l_ea)); 173 174 /* fixup eahdr tag */ 175 eahdr->tag.tag_loc = udf_rw32(lb_num); 176 udf_validate_tag_and_crc_sums((union dscrptr *) eahdr); 177 } 178 179 180 void 181 udf_fixup_node_internals(struct udf_mount *ump, uint8_t *blob, int udf_c_type) 182 { 183 struct desc_tag *tag, *sbm_tag; 184 struct file_entry *fe; 185 struct extfile_entry *efe; 186 struct alloc_ext_entry *ext; 187 uint32_t lb_size, lb_num; 188 uint32_t intern_pos, max_intern_pos; 189 int icbflags, addr_type, file_type, intern, has_fids, has_sbm, l_ea; 190 191 lb_size = udf_rw32(ump->logical_vol->lb_size); 192 /* if its not a node we're done */ 193 if (udf_c_type != UDF_C_NODE) 194 return; 195 196 /* NOTE this could also be done in write_internal */ 197 /* start of a descriptor */ 198 l_ea = 0; 199 has_fids = 0; 200 has_sbm = 0; 201 intern = 0; 202 file_type = 0; 203 max_intern_pos = intern_pos = lb_num = 0; /* shut up gcc! */ 204 205 tag = (struct desc_tag *) blob; 206 switch (udf_rw16(tag->id)) { 207 case TAGID_FENTRY : 208 fe = (struct file_entry *) tag; 209 l_ea = udf_rw32(fe->l_ea); 210 icbflags = udf_rw16(fe->icbtag.flags); 211 addr_type = (icbflags & UDF_ICB_TAG_FLAGS_ALLOC_MASK); 212 file_type = fe->icbtag.file_type; 213 intern = (addr_type == UDF_ICB_INTERN_ALLOC); 214 intern_pos = UDF_FENTRY_SIZE + l_ea; 215 max_intern_pos = intern_pos + udf_rw64(fe->inf_len); 216 lb_num = udf_rw32(fe->tag.tag_loc); 217 break; 218 case TAGID_EXTFENTRY : 219 efe = (struct extfile_entry *) tag; 220 l_ea = udf_rw32(efe->l_ea); 221 icbflags = udf_rw16(efe->icbtag.flags); 222 addr_type = (icbflags & UDF_ICB_TAG_FLAGS_ALLOC_MASK); 223 file_type = efe->icbtag.file_type; 224 intern = (addr_type == UDF_ICB_INTERN_ALLOC); 225 intern_pos = UDF_EXTFENTRY_SIZE + l_ea; 226 max_intern_pos = intern_pos + udf_rw64(efe->inf_len); 227 lb_num = udf_rw32(efe->tag.tag_loc); 228 break; 229 case TAGID_INDIRECTENTRY : 230 case TAGID_EXTATTR_HDR : 231 break; 232 case TAGID_ALLOCEXTENT : 233 /* force crclen to 8 for UDF version < 2.01 */ 234 ext = (struct alloc_ext_entry *) tag; 235 if (udf_rw16(ump->logvol_info->min_udf_readver) <= 0x200) 236 ext->tag.desc_crc_len = udf_rw16(8); 237 break; 238 default: 239 panic("%s: passed bad tag\n", __func__); 240 break; 241 } 242 243 /* determine what to fix if its internally recorded */ 244 if (intern) { 245 has_fids = (file_type == UDF_ICB_FILETYPE_DIRECTORY) || 246 (file_type == UDF_ICB_FILETYPE_STREAMDIR); 247 has_sbm = (file_type == UDF_ICB_FILETYPE_META_BITMAP); 248 } 249 250 /* fixup internal extended attributes if present */ 251 if (l_ea) 252 udf_fixup_internal_extattr(blob, lb_num); 253 254 /* fixup fids lb numbers */ 255 if (has_fids) 256 udf_fixup_fid_block(blob, lb_size, intern_pos, 257 max_intern_pos, lb_num); 258 259 /* fixup space bitmap descriptor */ 260 if (has_sbm) { 261 sbm_tag = (struct desc_tag *) (blob + intern_pos); 262 sbm_tag->tag_loc = tag->tag_loc; 263 udf_validate_tag_and_crc_sums((uint8_t *) sbm_tag); 264 } 265 266 udf_validate_tag_and_crc_sums(blob); 267 } 268 269 /* --------------------------------------------------------------------- */ 270 271 /* 272 * Set of generic descriptor readers and writers and their helper functions. 273 * Descriptors inside `logical space' i.e. inside logically mapped partitions 274 * can never be longer than one logical sector. 275 * 276 * NOTE that these functions *can* be used by the sheduler backends to read 277 * node descriptors too. 278 * 279 * For reading, the size of allocated piece is returned in multiple of sector 280 * size due to udf_calc_udf_malloc_size(). 281 */ 282 283 284 /* SYNC reading of n blocks from specified sector */ 285 int 286 udf_read_phys_sectors(struct udf_mount *ump, int what, void *blob, 287 uint32_t start, uint32_t sectors) 288 { 289 struct buf *buf, *nestbuf; 290 uint32_t buf_offset; 291 off_t lblkno, rblkno; 292 int sector_size = ump->discinfo.sector_size; 293 int blks = sector_size / DEV_BSIZE; 294 int piece; 295 int error; 296 297 DPRINTF(READ, ("udf_intbreadn() : sectors = %d, sector_size = %d\n", 298 sectors, sector_size)); 299 buf = getiobuf(ump->devvp, true); 300 buf->b_flags = B_READ; 301 buf->b_cflags = BC_BUSY; /* needed? */ 302 buf->b_iodone = NULL; 303 buf->b_data = blob; 304 buf->b_bcount = sectors * sector_size; 305 buf->b_resid = buf->b_bcount; 306 buf->b_bufsize = buf->b_bcount; 307 buf->b_private = NULL; /* not needed yet */ 308 BIO_SETPRIO(buf, BPRIO_DEFAULT); 309 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = start * blks; 310 buf->b_proc = NULL; 311 312 error = 0; 313 buf_offset = 0; 314 rblkno = start; 315 lblkno = 0; 316 while ((sectors > 0) && (error == 0)) { 317 piece = MIN(MAXPHYS/sector_size, sectors); 318 DPRINTF(READ, ("read in %d + %d\n", (uint32_t) rblkno, piece)); 319 320 nestbuf = getiobuf(NULL, true); 321 nestiobuf_setup(buf, nestbuf, buf_offset, piece * sector_size); 322 /* nestbuf is B_ASYNC */ 323 324 /* identify this nestbuf */ 325 nestbuf->b_lblkno = lblkno; 326 327 /* CD shedules on raw blkno */ 328 nestbuf->b_blkno = rblkno * blks; 329 nestbuf->b_proc = NULL; 330 nestbuf->b_rawblkno = rblkno * blks; 331 nestbuf->b_udf_c_type = what; 332 333 udf_discstrat_queuebuf(ump, nestbuf); 334 335 lblkno += piece; 336 rblkno += piece; 337 buf_offset += piece * sector_size; 338 sectors -= piece; 339 } 340 error = biowait(buf); 341 putiobuf(buf); 342 343 return error; 344 } 345 346 347 /* synchronous generic descriptor read */ 348 int 349 udf_read_phys_dscr(struct udf_mount *ump, uint32_t sector, 350 struct malloc_type *mtype, union dscrptr **dstp) 351 { 352 union dscrptr *dst, *new_dst; 353 uint8_t *pos; 354 int sectors, dscrlen; 355 int i, error, sector_size; 356 357 sector_size = ump->discinfo.sector_size; 358 359 *dstp = dst = NULL; 360 dscrlen = sector_size; 361 362 /* read initial piece */ 363 dst = malloc(sector_size, mtype, M_WAITOK); 364 error = udf_read_phys_sectors(ump, UDF_C_DSCR, dst, sector, 1); 365 DPRINTFIF(DESCRIPTOR, error, ("read error (%d)\n", error)); 366 367 if (!error) { 368 /* check if its a valid tag */ 369 error = udf_check_tag(dst); 370 if (error) { 371 /* check if its an empty block */ 372 pos = (uint8_t *) dst; 373 for (i = 0; i < sector_size; i++, pos++) { 374 if (*pos) break; 375 } 376 if (i == sector_size) { 377 /* return no error but with no dscrptr */ 378 /* dispose first block */ 379 free(dst, mtype); 380 return 0; 381 } 382 } 383 /* calculate descriptor size */ 384 dscrlen = udf_tagsize(dst, sector_size); 385 } 386 DPRINTFIF(DESCRIPTOR, error, ("bad tag checksum\n")); 387 388 if (!error && (dscrlen > sector_size)) { 389 DPRINTF(DESCRIPTOR, ("multi block descriptor read\n")); 390 /* 391 * Read the rest of descriptor. Since it is only used at mount 392 * time its overdone to define and use a specific udf_intbreadn 393 * for this alone. 394 */ 395 396 new_dst = realloc(dst, dscrlen, mtype, M_WAITOK); 397 if (new_dst == NULL) { 398 free(dst, mtype); 399 return ENOMEM; 400 } 401 dst = new_dst; 402 403 sectors = (dscrlen + sector_size -1) / sector_size; 404 DPRINTF(DESCRIPTOR, ("dscrlen = %d (%d blk)\n", dscrlen, sectors)); 405 406 pos = (uint8_t *) dst + sector_size; 407 error = udf_read_phys_sectors(ump, UDF_C_DSCR, pos, 408 sector + 1, sectors-1); 409 410 DPRINTFIF(DESCRIPTOR, error, ("read error on multi (%d)\n", 411 error)); 412 } 413 if (!error) { 414 error = udf_check_tag_payload(dst, dscrlen); 415 DPRINTFIF(DESCRIPTOR, error, ("bad payload check sum\n")); 416 } 417 if (error && dst) { 418 free(dst, mtype); 419 dst = NULL; 420 } 421 *dstp = dst; 422 423 return error; 424 } 425 426 427 static void 428 udf_write_phys_buf(struct udf_mount *ump, int what, struct buf *buf) 429 { 430 struct buf *nestbuf; 431 uint32_t buf_offset; 432 off_t lblkno, rblkno; 433 int sector_size = ump->discinfo.sector_size; 434 int blks = sector_size / DEV_BSIZE; 435 uint32_t sectors; 436 int piece; 437 int error; 438 439 sectors = buf->b_bcount / sector_size; 440 DPRINTF(WRITE, ("udf_intbwriten() : sectors = %d, sector_size = %d\n", 441 sectors, sector_size)); 442 443 /* don't forget to increase pending count for the bwrite itself */ 444 /* panic("NO WRITING\n"); */ 445 if (buf->b_vp) { 446 mutex_enter(&buf->b_vp->v_interlock); 447 buf->b_vp->v_numoutput++; 448 mutex_exit(&buf->b_vp->v_interlock); 449 } 450 451 error = 0; 452 buf_offset = 0; 453 rblkno = buf->b_blkno / blks; 454 lblkno = 0; 455 while ((sectors > 0) && (error == 0)) { 456 piece = MIN(MAXPHYS/sector_size, sectors); 457 DPRINTF(WRITE, ("write out %d + %d\n", 458 (uint32_t) rblkno, piece)); 459 460 nestbuf = getiobuf(NULL, true); 461 nestiobuf_setup(buf, nestbuf, buf_offset, piece * sector_size); 462 /* nestbuf is B_ASYNC */ 463 464 /* identify this nestbuf */ 465 nestbuf->b_lblkno = lblkno; 466 467 /* CD shedules on raw blkno */ 468 nestbuf->b_blkno = rblkno * blks; 469 nestbuf->b_proc = NULL; 470 nestbuf->b_rawblkno = rblkno * blks; 471 nestbuf->b_udf_c_type = what; 472 473 udf_discstrat_queuebuf(ump, nestbuf); 474 475 lblkno += piece; 476 rblkno += piece; 477 buf_offset += piece * sector_size; 478 sectors -= piece; 479 } 480 } 481 482 483 /* SYNC writing of n blocks from specified sector */ 484 int 485 udf_write_phys_sectors(struct udf_mount *ump, int what, void *blob, 486 uint32_t start, uint32_t sectors) 487 { 488 struct vnode *vp; 489 struct buf *buf; 490 int sector_size = ump->discinfo.sector_size; 491 int blks = sector_size / DEV_BSIZE; 492 int error; 493 494 /* get transfer buffer */ 495 vp = ump->devvp; 496 buf = getiobuf(vp, true); 497 buf->b_flags = B_WRITE; 498 buf->b_cflags = BC_BUSY; /* needed? */ 499 buf->b_iodone = NULL; 500 buf->b_data = blob; 501 buf->b_bcount = sectors * sector_size; 502 buf->b_resid = buf->b_bcount; 503 buf->b_bufsize = buf->b_bcount; 504 buf->b_private = NULL; /* not needed yet */ 505 BIO_SETPRIO(buf, BPRIO_DEFAULT); 506 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = start * blks; 507 buf->b_proc = NULL; 508 509 /* do the write, wait and return error */ 510 udf_write_phys_buf(ump, what, buf); 511 error = biowait(buf); 512 putiobuf(buf); 513 514 return error; 515 } 516 517 518 /* synchronous generic descriptor write */ 519 int 520 udf_write_phys_dscr_sync(struct udf_mount *ump, struct udf_node *udf_node, int what, 521 union dscrptr *dscr, uint32_t sector, uint32_t logsector) 522 { 523 struct vnode *vp; 524 struct buf *buf; 525 int sector_size = ump->discinfo.sector_size; 526 int blks = sector_size / DEV_BSIZE; 527 int dscrlen; 528 int error; 529 530 /* set sector number in the descriptor and validate */ 531 dscr->tag.tag_loc = udf_rw32(logsector); 532 udf_validate_tag_and_crc_sums(dscr); 533 534 /* calculate descriptor size */ 535 dscrlen = udf_tagsize(dscr, sector_size); 536 537 /* get transfer buffer */ 538 vp = udf_node ? udf_node->vnode : ump->devvp; 539 buf = getiobuf(vp, true); 540 buf->b_flags = B_WRITE; 541 buf->b_cflags = BC_BUSY; /* needed? */ 542 buf->b_iodone = NULL; 543 buf->b_data = (void *) dscr; 544 buf->b_bcount = dscrlen; 545 buf->b_resid = buf->b_bcount; 546 buf->b_bufsize = buf->b_bcount; 547 buf->b_private = NULL; /* not needed yet */ 548 BIO_SETPRIO(buf, BPRIO_DEFAULT); 549 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = sector * blks; 550 buf->b_proc = NULL; 551 552 /* do the write, wait and return error */ 553 udf_write_phys_buf(ump, what, buf); 554 error = biowait(buf); 555 putiobuf(buf); 556 557 return error; 558 } 559 560 561 /* asynchronous generic descriptor write */ 562 int 563 udf_write_phys_dscr_async(struct udf_mount *ump, struct udf_node *udf_node, 564 int what, union dscrptr *dscr, 565 uint32_t sector, uint32_t logsector, 566 void (*dscrwr_callback)(struct buf *)) 567 { 568 struct vnode *vp; 569 struct buf *buf; 570 int dscrlen; 571 int sector_size = ump->discinfo.sector_size; 572 int blks = sector_size / DEV_BSIZE; 573 574 KASSERT(dscrwr_callback); 575 DPRINTF(NODE, ("udf_write_phys_dscr_async() called\n")); 576 577 /* set sector number in the descriptor and validate */ 578 dscr->tag.tag_loc = udf_rw32(logsector); 579 udf_validate_tag_and_crc_sums(dscr); 580 581 /* calculate descriptor size */ 582 dscrlen = udf_tagsize(dscr, sector_size); 583 584 /* get transfer buffer */ 585 vp = udf_node ? udf_node->vnode : ump->devvp; 586 buf = getiobuf(vp, true); 587 buf->b_flags = B_WRITE; // | B_ASYNC; 588 buf->b_cflags = BC_BUSY; 589 buf->b_iodone = dscrwr_callback; 590 buf->b_data = dscr; 591 buf->b_bcount = dscrlen; 592 buf->b_resid = buf->b_bcount; 593 buf->b_bufsize = buf->b_bcount; 594 buf->b_private = NULL; /* not needed yet */ 595 BIO_SETPRIO(buf, BPRIO_DEFAULT); 596 buf->b_lblkno = buf->b_blkno = buf->b_rawblkno = sector * blks; 597 buf->b_proc = NULL; 598 599 /* do the write and return no error */ 600 udf_write_phys_buf(ump, what, buf); 601 return 0; 602 } 603 604 /* --------------------------------------------------------------------- */ 605 606 /* disc strategy dispatchers */ 607 608 int 609 udf_create_logvol_dscr(struct udf_mount *ump, struct udf_node *udf_node, struct long_ad *icb, 610 union dscrptr **dscrptr) 611 { 612 struct udf_strategy *strategy = ump->strategy; 613 struct udf_strat_args args; 614 int error; 615 616 KASSERT(strategy); 617 args.ump = ump; 618 args.udf_node = udf_node; 619 args.icb = icb; 620 args.dscr = NULL; 621 622 error = (strategy->create_logvol_dscr)(&args); 623 *dscrptr = args.dscr; 624 625 return error; 626 } 627 628 629 void 630 udf_free_logvol_dscr(struct udf_mount *ump, struct long_ad *icb, 631 void *dscr) 632 { 633 struct udf_strategy *strategy = ump->strategy; 634 struct udf_strat_args args; 635 636 KASSERT(strategy); 637 args.ump = ump; 638 args.icb = icb; 639 args.dscr = dscr; 640 641 (strategy->free_logvol_dscr)(&args); 642 } 643 644 645 int 646 udf_read_logvol_dscr(struct udf_mount *ump, struct long_ad *icb, 647 union dscrptr **dscrptr) 648 { 649 struct udf_strategy *strategy = ump->strategy; 650 struct udf_strat_args args; 651 int error; 652 653 KASSERT(strategy); 654 args.ump = ump; 655 args.icb = icb; 656 args.dscr = NULL; 657 658 error = (strategy->read_logvol_dscr)(&args); 659 *dscrptr = args.dscr; 660 661 return error; 662 } 663 664 665 int 666 udf_write_logvol_dscr(struct udf_node *udf_node, union dscrptr *dscr, 667 struct long_ad *icb, int waitfor) 668 { 669 struct udf_strategy *strategy = udf_node->ump->strategy; 670 struct udf_strat_args args; 671 int error; 672 673 KASSERT(strategy); 674 args.ump = udf_node->ump; 675 args.udf_node = udf_node; 676 args.icb = icb; 677 args.dscr = dscr; 678 args.waitfor = waitfor; 679 680 error = (strategy->write_logvol_dscr)(&args); 681 return error; 682 } 683 684 685 void 686 udf_discstrat_queuebuf(struct udf_mount *ump, struct buf *nestbuf) 687 { 688 struct udf_strategy *strategy = ump->strategy; 689 struct udf_strat_args args; 690 691 KASSERT(strategy); 692 args.ump = ump; 693 args.nestbuf = nestbuf; 694 695 (strategy->queuebuf)(&args); 696 } 697 698 699 void 700 udf_discstrat_init(struct udf_mount *ump) 701 { 702 struct udf_strategy *strategy = ump->strategy; 703 struct udf_strat_args args; 704 705 KASSERT(strategy); 706 args.ump = ump; 707 (strategy->discstrat_init)(&args); 708 } 709 710 711 void udf_discstrat_finish(struct udf_mount *ump) 712 { 713 struct udf_strategy *strategy = ump->strategy; 714 struct udf_strat_args args; 715 716 /* strategy might not have been set, so ignore if not set */ 717 if (strategy) { 718 args.ump = ump; 719 (strategy->discstrat_finish)(&args); 720 } 721 } 722 723 /* --------------------------------------------------------------------- */ 724 725
Indexes created Tue Sep 23 23:09:58 GMT 2025