ld.c revision 1.49.6.2
1 /* $NetBSD: ld.c,v 1.49.6.2 2008/01/09 01:52:13 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran and Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Disk driver for use by RAID controllers. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ld.c,v 1.49.6.2 2008/01/09 01:52:13 matt Exp $"); 45 46 #include "rnd.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/device.h> 52 #include <sys/queue.h> 53 #include <sys/proc.h> 54 #include <sys/buf.h> 55 #include <sys/bufq.h> 56 #include <sys/endian.h> 57 #include <sys/disklabel.h> 58 #include <sys/disk.h> 59 #include <sys/dkio.h> 60 #include <sys/stat.h> 61 #include <sys/conf.h> 62 #include <sys/fcntl.h> 63 #include <sys/vnode.h> 64 #include <sys/syslog.h> 65 #include <sys/mutex.h> 66 #if NRND > 0 67 #include <sys/rnd.h> 68 #endif 69 70 #include <dev/ldvar.h> 71 72 #include <prop/proplib.h> 73 74 static void ldgetdefaultlabel(struct ld_softc *, struct disklabel *); 75 static void ldgetdisklabel(struct ld_softc *); 76 static void ldminphys(struct buf *bp); 77 static void ldshutdown(void *); 78 static void ldstart(struct ld_softc *, struct buf *); 79 static void ld_set_properties(struct ld_softc *); 80 static void ld_config_interrupts (struct device *); 81 82 extern struct cfdriver ld_cd; 83 84 static dev_type_open(ldopen); 85 static dev_type_close(ldclose); 86 static dev_type_read(ldread); 87 static dev_type_write(ldwrite); 88 static dev_type_ioctl(ldioctl); 89 static dev_type_strategy(ldstrategy); 90 static dev_type_dump(lddump); 91 static dev_type_size(ldsize); 92 93 const struct bdevsw ld_bdevsw = { 94 ldopen, ldclose, ldstrategy, ldioctl, lddump, ldsize, D_DISK 95 }; 96 97 const struct cdevsw ld_cdevsw = { 98 ldopen, ldclose, ldread, ldwrite, ldioctl, 99 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 100 }; 101 102 static struct dkdriver lddkdriver = { ldstrategy, ldminphys }; 103 static void *ld_sdh; 104 105 void 106 ldattach(struct ld_softc *sc) 107 { 108 char tbuf[9]; 109 110 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); 111 112 if ((sc->sc_flags & LDF_ENABLED) == 0) { 113 aprint_normal("%s: disabled\n", sc->sc_dv.dv_xname); 114 return; 115 } 116 117 /* Initialise and attach the disk structure. */ 118 disk_init(&sc->sc_dk, sc->sc_dv.dv_xname, &lddkdriver); 119 disk_attach(&sc->sc_dk); 120 121 if (sc->sc_maxxfer > MAXPHYS) 122 sc->sc_maxxfer = MAXPHYS; 123 124 /* Build synthetic geometry if necessary. */ 125 if (sc->sc_nheads == 0 || sc->sc_nsectors == 0 || 126 sc->sc_ncylinders == 0) { 127 uint64_t ncyl; 128 129 if (sc->sc_secperunit <= 528 * 2048) /* 528MB */ 130 sc->sc_nheads = 16; 131 else if (sc->sc_secperunit <= 1024 * 2048) /* 1GB */ 132 sc->sc_nheads = 32; 133 else if (sc->sc_secperunit <= 21504 * 2048) /* 21GB */ 134 sc->sc_nheads = 64; 135 else if (sc->sc_secperunit <= 43008 * 2048) /* 42GB */ 136 sc->sc_nheads = 128; 137 else 138 sc->sc_nheads = 255; 139 140 sc->sc_nsectors = 63; 141 sc->sc_ncylinders = INT_MAX; 142 ncyl = sc->sc_secperunit / 143 (sc->sc_nheads * sc->sc_nsectors); 144 if (ncyl < INT_MAX) 145 sc->sc_ncylinders = (int)ncyl; 146 } 147 148 format_bytes(tbuf, sizeof(tbuf), sc->sc_secperunit * 149 sc->sc_secsize); 150 aprint_normal("%s: %s, %d cyl, %d head, %d sec, %d bytes/sect x %"PRIu64" sectors\n", 151 sc->sc_dv.dv_xname, tbuf, sc->sc_ncylinders, sc->sc_nheads, 152 sc->sc_nsectors, sc->sc_secsize, sc->sc_secperunit); 153 154 ld_set_properties(sc); 155 156 #if NRND > 0 157 /* Attach the device into the rnd source list. */ 158 rnd_attach_source(&sc->sc_rnd_source, sc->sc_dv.dv_xname, 159 RND_TYPE_DISK, 0); 160 #endif 161 162 /* Set the `shutdownhook'. */ 163 if (ld_sdh == NULL) 164 ld_sdh = shutdownhook_establish(ldshutdown, NULL); 165 bufq_alloc(&sc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK); 166 167 /* Discover wedges on this disk. */ 168 config_interrupts(&sc->sc_dv, ld_config_interrupts); 169 } 170 171 int 172 ldadjqparam(struct ld_softc *sc, int xmax) 173 { 174 int s; 175 176 s = splbio(); 177 sc->sc_maxqueuecnt = xmax; 178 splx(s); 179 180 return (0); 181 } 182 183 int 184 ldbegindetach(struct ld_softc *sc, int flags) 185 { 186 int s, rv = 0; 187 188 if ((sc->sc_flags & LDF_ENABLED) == 0) 189 return (0); 190 191 if ((flags & DETACH_FORCE) == 0 && sc->sc_dk.dk_openmask != 0) 192 return (EBUSY); 193 194 s = splbio(); 195 sc->sc_maxqueuecnt = 0; 196 sc->sc_flags |= LDF_DETACH; 197 while (sc->sc_queuecnt > 0) { 198 sc->sc_flags |= LDF_DRAIN; 199 rv = tsleep(&sc->sc_queuecnt, PRIBIO, "lddrn", 0); 200 if (rv) 201 break; 202 } 203 splx(s); 204 205 return (rv); 206 } 207 208 void 209 ldenddetach(struct ld_softc *sc) 210 { 211 int s, bmaj, cmaj, i, mn; 212 213 if ((sc->sc_flags & LDF_ENABLED) == 0) 214 return; 215 216 /* Wait for commands queued with the hardware to complete. */ 217 if (sc->sc_queuecnt != 0) 218 if (tsleep(&sc->sc_queuecnt, PRIBIO, "lddtch", 30 * hz)) 219 printf("%s: not drained\n", sc->sc_dv.dv_xname); 220 221 /* Locate the major numbers. */ 222 bmaj = bdevsw_lookup_major(&ld_bdevsw); 223 cmaj = cdevsw_lookup_major(&ld_cdevsw); 224 225 /* Kill off any queued buffers. */ 226 s = splbio(); 227 bufq_drain(sc->sc_bufq); 228 splx(s); 229 230 bufq_free(sc->sc_bufq); 231 232 /* Nuke the vnodes for any open instances. */ 233 for (i = 0; i < MAXPARTITIONS; i++) { 234 mn = DISKMINOR(device_unit(&sc->sc_dv), i); 235 vdevgone(bmaj, mn, mn, VBLK); 236 vdevgone(cmaj, mn, mn, VCHR); 237 } 238 239 /* Delete all of our wedges. */ 240 dkwedge_delall(&sc->sc_dk); 241 242 /* Detach from the disk list. */ 243 disk_detach(&sc->sc_dk); 244 disk_destroy(&sc->sc_dk); 245 246 #if NRND > 0 247 /* Unhook the entropy source. */ 248 rnd_detach_source(&sc->sc_rnd_source); 249 #endif 250 251 /* 252 * XXX We can't really flush the cache here, beceause the 253 * XXX device may already be non-existent from the controller's 254 * XXX perspective. 255 */ 256 #if 0 257 /* Flush the device's cache. */ 258 if (sc->sc_flush != NULL) 259 if ((*sc->sc_flush)(sc) != 0) 260 printf("%s: unable to flush cache\n", 261 sc->sc_dv.dv_xname); 262 #endif 263 } 264 265 /* ARGSUSED */ 266 static void 267 ldshutdown(void *cookie) 268 { 269 struct ld_softc *sc; 270 int i; 271 272 for (i = 0; i < ld_cd.cd_ndevs; i++) { 273 if ((sc = device_lookup(&ld_cd, i)) == NULL) 274 continue; 275 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) 276 printf("%s: unable to flush cache\n", 277 sc->sc_dv.dv_xname); 278 } 279 } 280 281 /* ARGSUSED */ 282 static int 283 ldopen(dev_t dev, int flags, int fmt, struct lwp *l) 284 { 285 struct ld_softc *sc; 286 int error, unit, part; 287 288 unit = DISKUNIT(dev); 289 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 290 return (ENXIO); 291 if ((sc->sc_flags & LDF_ENABLED) == 0) 292 return (ENODEV); 293 part = DISKPART(dev); 294 295 mutex_enter(&sc->sc_dk.dk_openlock); 296 297 if (sc->sc_dk.dk_openmask == 0) { 298 /* Load the partition info if not already loaded. */ 299 if ((sc->sc_flags & LDF_VLABEL) == 0) 300 ldgetdisklabel(sc); 301 } 302 303 /* Check that the partition exists. */ 304 if (part != RAW_PART && (part >= sc->sc_dk.dk_label->d_npartitions || 305 sc->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 306 error = ENXIO; 307 goto bad1; 308 } 309 310 /* Ensure only one open at a time. */ 311 switch (fmt) { 312 case S_IFCHR: 313 sc->sc_dk.dk_copenmask |= (1 << part); 314 break; 315 case S_IFBLK: 316 sc->sc_dk.dk_bopenmask |= (1 << part); 317 break; 318 } 319 sc->sc_dk.dk_openmask = 320 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 321 322 error = 0; 323 bad1: 324 mutex_exit(&sc->sc_dk.dk_openlock); 325 return (error); 326 } 327 328 /* ARGSUSED */ 329 static int 330 ldclose(dev_t dev, int flags, int fmt, struct lwp *l) 331 { 332 struct ld_softc *sc; 333 int part, unit; 334 335 unit = DISKUNIT(dev); 336 part = DISKPART(dev); 337 sc = device_lookup(&ld_cd, unit); 338 339 mutex_enter(&sc->sc_dk.dk_openlock); 340 341 switch (fmt) { 342 case S_IFCHR: 343 sc->sc_dk.dk_copenmask &= ~(1 << part); 344 break; 345 case S_IFBLK: 346 sc->sc_dk.dk_bopenmask &= ~(1 << part); 347 break; 348 } 349 sc->sc_dk.dk_openmask = 350 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 351 352 if (sc->sc_dk.dk_openmask == 0) { 353 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) 354 printf("%s: unable to flush cache\n", 355 sc->sc_dv.dv_xname); 356 if ((sc->sc_flags & LDF_KLABEL) == 0) 357 sc->sc_flags &= ~LDF_VLABEL; 358 } 359 360 mutex_exit(&sc->sc_dk.dk_openlock); 361 return (0); 362 } 363 364 /* ARGSUSED */ 365 static int 366 ldread(dev_t dev, struct uio *uio, int ioflag) 367 { 368 369 return (physio(ldstrategy, NULL, dev, B_READ, ldminphys, uio)); 370 } 371 372 /* ARGSUSED */ 373 static int 374 ldwrite(dev_t dev, struct uio *uio, int ioflag) 375 { 376 377 return (physio(ldstrategy, NULL, dev, B_WRITE, ldminphys, uio)); 378 } 379 380 /* ARGSUSED */ 381 static int 382 ldioctl(dev_t dev, u_long cmd, void *addr, int32_t flag, struct lwp *l) 383 { 384 struct ld_softc *sc; 385 int part, unit, error; 386 #ifdef __HAVE_OLD_DISKLABEL 387 struct disklabel newlabel; 388 #endif 389 struct disklabel *lp; 390 391 unit = DISKUNIT(dev); 392 part = DISKPART(dev); 393 sc = device_lookup(&ld_cd, unit); 394 395 error = disk_ioctl(&sc->sc_dk, cmd, addr, flag, l); 396 if (error != EPASSTHROUGH) 397 return (error); 398 399 error = 0; 400 switch (cmd) { 401 case DIOCGDINFO: 402 memcpy(addr, sc->sc_dk.dk_label, sizeof(struct disklabel)); 403 return (0); 404 405 #ifdef __HAVE_OLD_DISKLABEL 406 case ODIOCGDINFO: 407 newlabel = *(sc->sc_dk.dk_label); 408 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 409 return ENOTTY; 410 memcpy(addr, &newlabel, sizeof(struct olddisklabel)); 411 return (0); 412 #endif 413 414 case DIOCGPART: 415 ((struct partinfo *)addr)->disklab = sc->sc_dk.dk_label; 416 ((struct partinfo *)addr)->part = 417 &sc->sc_dk.dk_label->d_partitions[part]; 418 break; 419 420 case DIOCWDINFO: 421 case DIOCSDINFO: 422 #ifdef __HAVE_OLD_DISKLABEL 423 case ODIOCWDINFO: 424 case ODIOCSDINFO: 425 426 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 427 memset(&newlabel, 0, sizeof newlabel); 428 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 429 lp = &newlabel; 430 } else 431 #endif 432 lp = (struct disklabel *)addr; 433 434 if ((flag & FWRITE) == 0) 435 return (EBADF); 436 437 mutex_enter(&sc->sc_dk.dk_openlock); 438 sc->sc_flags |= LDF_LABELLING; 439 440 error = setdisklabel(sc->sc_dk.dk_label, 441 lp, /*sc->sc_dk.dk_openmask : */0, 442 sc->sc_dk.dk_cpulabel); 443 if (error == 0 && (cmd == DIOCWDINFO 444 #ifdef __HAVE_OLD_DISKLABEL 445 || cmd == ODIOCWDINFO 446 #endif 447 )) 448 error = writedisklabel( 449 MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 450 ldstrategy, sc->sc_dk.dk_label, 451 sc->sc_dk.dk_cpulabel); 452 453 sc->sc_flags &= ~LDF_LABELLING; 454 mutex_exit(&sc->sc_dk.dk_openlock); 455 break; 456 457 case DIOCKLABEL: 458 if ((flag & FWRITE) == 0) 459 return (EBADF); 460 if (*(int *)addr) 461 sc->sc_flags |= LDF_KLABEL; 462 else 463 sc->sc_flags &= ~LDF_KLABEL; 464 break; 465 466 case DIOCWLABEL: 467 if ((flag & FWRITE) == 0) 468 return (EBADF); 469 if (*(int *)addr) 470 sc->sc_flags |= LDF_WLABEL; 471 else 472 sc->sc_flags &= ~LDF_WLABEL; 473 break; 474 475 case DIOCGDEFLABEL: 476 ldgetdefaultlabel(sc, (struct disklabel *)addr); 477 break; 478 479 #ifdef __HAVE_OLD_DISKLABEL 480 case ODIOCGDEFLABEL: 481 ldgetdefaultlabel(sc, &newlabel); 482 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 483 return ENOTTY; 484 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 485 break; 486 #endif 487 488 case DIOCCACHESYNC: 489 /* 490 * XXX Do we really need to care about having a writable 491 * file descriptor here? 492 */ 493 if ((flag & FWRITE) == 0) 494 error = EBADF; 495 else if (sc->sc_flush) 496 error = (*sc->sc_flush)(sc); 497 else 498 error = 0; /* XXX Error out instead? */ 499 break; 500 501 case DIOCAWEDGE: 502 { 503 struct dkwedge_info *dkw = (void *) addr; 504 505 if ((flag & FWRITE) == 0) 506 return (EBADF); 507 508 /* If the ioctl happens here, the parent is us. */ 509 strcpy(dkw->dkw_parent, sc->sc_dv.dv_xname); 510 return (dkwedge_add(dkw)); 511 } 512 513 case DIOCDWEDGE: 514 { 515 struct dkwedge_info *dkw = (void *) addr; 516 517 if ((flag & FWRITE) == 0) 518 return (EBADF); 519 520 /* If the ioctl happens here, the parent is us. */ 521 strcpy(dkw->dkw_parent, sc->sc_dv.dv_xname); 522 return (dkwedge_del(dkw)); 523 } 524 525 case DIOCLWEDGES: 526 { 527 struct dkwedge_list *dkwl = (void *) addr; 528 529 return (dkwedge_list(&sc->sc_dk, dkwl, l)); 530 } 531 case DIOCGSTRATEGY: 532 { 533 struct disk_strategy *dks = (void *)addr; 534 535 mutex_enter(&sc->sc_mutex); 536 strlcpy(dks->dks_name, bufq_getstrategyname(sc->sc_bufq), 537 sizeof(dks->dks_name)); 538 mutex_exit(&sc->sc_mutex); 539 dks->dks_paramlen = 0; 540 541 return 0; 542 } 543 case DIOCSSTRATEGY: 544 { 545 struct disk_strategy *dks = (void *)addr; 546 struct bufq_state *new, *old; 547 548 if ((flag & FWRITE) == 0) 549 return EPERM; 550 551 if (dks->dks_param != NULL) 552 return EINVAL; 553 554 dks->dks_name[sizeof(dks->dks_name) - 1] = 0; /* ensure term */ 555 error = bufq_alloc(&new, dks->dks_name, 556 BUFQ_EXACT|BUFQ_SORT_RAWBLOCK); 557 if (error) 558 return error; 559 560 mutex_enter(&sc->sc_mutex); 561 old = sc->sc_bufq; 562 bufq_move(new, old); 563 sc->sc_bufq = new; 564 mutex_exit(&sc->sc_mutex); 565 bufq_free(old); 566 567 return 0; 568 } 569 default: 570 error = ENOTTY; 571 break; 572 } 573 574 return (error); 575 } 576 577 static void 578 ldstrategy(struct buf *bp) 579 { 580 struct ld_softc *sc; 581 struct disklabel *lp; 582 daddr_t blkno; 583 int s, part; 584 585 sc = device_lookup(&ld_cd, DISKUNIT(bp->b_dev)); 586 part = DISKPART(bp->b_dev); 587 588 if ((sc->sc_flags & LDF_DETACH) != 0) { 589 bp->b_error = EIO; 590 goto done; 591 } 592 593 lp = sc->sc_dk.dk_label; 594 595 /* 596 * The transfer must be a whole number of blocks and the offset must 597 * not be negative. 598 */ 599 if ((bp->b_bcount % lp->d_secsize) != 0 || bp->b_blkno < 0) { 600 bp->b_error = EINVAL; 601 goto done; 602 } 603 604 /* If it's a null transfer, return immediately. */ 605 if (bp->b_bcount == 0) 606 goto done; 607 608 /* 609 * Do bounds checking and adjust the transfer. If error, process. 610 * If past the end of partition, just return. 611 */ 612 if (part != RAW_PART && 613 bounds_check_with_label(&sc->sc_dk, bp, 614 (sc->sc_flags & (LDF_WLABEL | LDF_LABELLING)) != 0) <= 0) { 615 goto done; 616 } 617 618 /* 619 * Convert the block number to absolute and put it in terms 620 * of the device's logical block size. 621 */ 622 if (lp->d_secsize == DEV_BSIZE) 623 blkno = bp->b_blkno; 624 else if (lp->d_secsize > DEV_BSIZE) 625 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 626 else 627 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 628 629 if (part != RAW_PART) 630 blkno += lp->d_partitions[part].p_offset; 631 632 bp->b_rawblkno = blkno; 633 634 s = splbio(); 635 ldstart(sc, bp); 636 splx(s); 637 return; 638 639 done: 640 bp->b_resid = bp->b_bcount; 641 biodone(bp); 642 } 643 644 static void 645 ldstart(struct ld_softc *sc, struct buf *bp) 646 { 647 int error; 648 649 mutex_enter(&sc->sc_mutex); 650 651 if (bp != NULL) 652 BUFQ_PUT(sc->sc_bufq, bp); 653 654 while (sc->sc_queuecnt < sc->sc_maxqueuecnt) { 655 /* See if there is work to do. */ 656 if ((bp = BUFQ_PEEK(sc->sc_bufq)) == NULL) 657 break; 658 659 disk_busy(&sc->sc_dk); 660 sc->sc_queuecnt++; 661 662 if (__predict_true((error = (*sc->sc_start)(sc, bp)) == 0)) { 663 /* 664 * The back-end is running the job; remove it from 665 * the queue. 666 */ 667 (void) BUFQ_GET(sc->sc_bufq); 668 } else { 669 disk_unbusy(&sc->sc_dk, 0, (bp->b_flags & B_READ)); 670 sc->sc_queuecnt--; 671 if (error == EAGAIN) { 672 /* 673 * Temporary resource shortage in the 674 * back-end; just defer the job until 675 * later. 676 * 677 * XXX We might consider a watchdog timer 678 * XXX to make sure we are kicked into action. 679 */ 680 break; 681 } else { 682 (void) BUFQ_GET(sc->sc_bufq); 683 bp->b_error = error; 684 bp->b_resid = bp->b_bcount; 685 mutex_exit(&sc->sc_mutex); 686 biodone(bp); 687 mutex_enter(&sc->sc_mutex); 688 } 689 } 690 } 691 692 mutex_exit(&sc->sc_mutex); 693 } 694 695 void 696 lddone(struct ld_softc *sc, struct buf *bp) 697 { 698 699 if (bp->b_error != 0) { 700 diskerr(bp, "ld", "error", LOG_PRINTF, 0, sc->sc_dk.dk_label); 701 printf("\n"); 702 } 703 704 disk_unbusy(&sc->sc_dk, bp->b_bcount - bp->b_resid, 705 (bp->b_flags & B_READ)); 706 #if NRND > 0 707 rnd_add_uint32(&sc->sc_rnd_source, bp->b_rawblkno); 708 #endif 709 biodone(bp); 710 711 mutex_enter(&sc->sc_mutex); 712 if (--sc->sc_queuecnt <= sc->sc_maxqueuecnt) { 713 if ((sc->sc_flags & LDF_DRAIN) != 0) { 714 sc->sc_flags &= ~LDF_DRAIN; 715 wakeup(&sc->sc_queuecnt); 716 } 717 mutex_exit(&sc->sc_mutex); 718 ldstart(sc, NULL); 719 } else 720 mutex_exit(&sc->sc_mutex); 721 } 722 723 static int 724 ldsize(dev_t dev) 725 { 726 struct ld_softc *sc; 727 int part, unit, omask, size; 728 729 unit = DISKUNIT(dev); 730 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 731 return (ENODEV); 732 if ((sc->sc_flags & LDF_ENABLED) == 0) 733 return (ENODEV); 734 part = DISKPART(dev); 735 736 omask = sc->sc_dk.dk_openmask & (1 << part); 737 738 if (omask == 0 && ldopen(dev, 0, S_IFBLK, NULL) != 0) 739 return (-1); 740 else if (sc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 741 size = -1; 742 else 743 size = sc->sc_dk.dk_label->d_partitions[part].p_size * 744 (sc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 745 if (omask == 0 && ldclose(dev, 0, S_IFBLK, NULL) != 0) 746 return (-1); 747 748 return (size); 749 } 750 751 /* 752 * Load the label information from the specified device. 753 */ 754 static void 755 ldgetdisklabel(struct ld_softc *sc) 756 { 757 const char *errstring; 758 759 ldgetdefaultlabel(sc, sc->sc_dk.dk_label); 760 761 /* Call the generic disklabel extraction routine. */ 762 errstring = readdisklabel(MAKEDISKDEV(0, device_unit(&sc->sc_dv), 763 RAW_PART), ldstrategy, sc->sc_dk.dk_label, sc->sc_dk.dk_cpulabel); 764 if (errstring != NULL) 765 printf("%s: %s\n", sc->sc_dv.dv_xname, errstring); 766 767 /* In-core label now valid. */ 768 sc->sc_flags |= LDF_VLABEL; 769 } 770 771 /* 772 * Construct a ficticious label. 773 */ 774 static void 775 ldgetdefaultlabel(struct ld_softc *sc, struct disklabel *lp) 776 { 777 778 memset(lp, 0, sizeof(struct disklabel)); 779 780 lp->d_secsize = sc->sc_secsize; 781 lp->d_ntracks = sc->sc_nheads; 782 lp->d_nsectors = sc->sc_nsectors; 783 lp->d_ncylinders = sc->sc_ncylinders; 784 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 785 lp->d_type = DTYPE_LD; 786 strlcpy(lp->d_typename, "unknown", sizeof(lp->d_typename)); 787 strlcpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 788 lp->d_secperunit = sc->sc_secperunit; 789 lp->d_rpm = 7200; 790 lp->d_interleave = 1; 791 lp->d_flags = 0; 792 793 lp->d_partitions[RAW_PART].p_offset = 0; 794 lp->d_partitions[RAW_PART].p_size = 795 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 796 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 797 lp->d_npartitions = RAW_PART + 1; 798 799 lp->d_magic = DISKMAGIC; 800 lp->d_magic2 = DISKMAGIC; 801 lp->d_checksum = dkcksum(lp); 802 } 803 804 /* 805 * Take a dump. 806 */ 807 static int 808 lddump(dev_t dev, daddr_t blkno, void *vav, size_t size) 809 { 810 char *va = vav; 811 struct ld_softc *sc; 812 struct disklabel *lp; 813 int unit, part, nsects, sectoff, towrt, nblk, maxblkcnt, rv; 814 static int dumping; 815 816 unit = DISKUNIT(dev); 817 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 818 return (ENXIO); 819 if ((sc->sc_flags & LDF_ENABLED) == 0) 820 return (ENODEV); 821 if (sc->sc_dump == NULL) 822 return (ENXIO); 823 824 /* Check if recursive dump; if so, punt. */ 825 if (dumping) 826 return (EFAULT); 827 dumping = 1; 828 829 /* Convert to disk sectors. Request must be a multiple of size. */ 830 part = DISKPART(dev); 831 lp = sc->sc_dk.dk_label; 832 if ((size % lp->d_secsize) != 0) 833 return (EFAULT); 834 towrt = size / lp->d_secsize; 835 blkno = dbtob(blkno) / lp->d_secsize; /* blkno in DEV_BSIZE units */ 836 837 nsects = lp->d_partitions[part].p_size; 838 sectoff = lp->d_partitions[part].p_offset; 839 840 /* Check transfer bounds against partition size. */ 841 if ((blkno < 0) || ((blkno + towrt) > nsects)) 842 return (EINVAL); 843 844 /* Offset block number to start of partition. */ 845 blkno += sectoff; 846 847 /* Start dumping and return when done. */ 848 maxblkcnt = sc->sc_maxxfer / sc->sc_secsize - 1; 849 while (towrt > 0) { 850 nblk = min(maxblkcnt, towrt); 851 852 if ((rv = (*sc->sc_dump)(sc, va, blkno, nblk)) != 0) 853 return (rv); 854 855 towrt -= nblk; 856 blkno += nblk; 857 va += nblk * sc->sc_secsize; 858 } 859 860 dumping = 0; 861 return (0); 862 } 863 864 /* 865 * Adjust the size of a transfer. 866 */ 867 static void 868 ldminphys(struct buf *bp) 869 { 870 struct ld_softc *sc; 871 872 sc = device_lookup(&ld_cd, DISKUNIT(bp->b_dev)); 873 874 if (bp->b_bcount > sc->sc_maxxfer) 875 bp->b_bcount = sc->sc_maxxfer; 876 minphys(bp); 877 } 878 879 static void 880 ld_set_properties(struct ld_softc *ld) 881 { 882 prop_dictionary_t disk_info, odisk_info, geom; 883 884 disk_info = prop_dictionary_create(); 885 886 geom = prop_dictionary_create(); 887 888 prop_dictionary_set_uint64(geom, "sectors-per-unit", 889 ld->sc_secperunit); 890 891 prop_dictionary_set_uint32(geom, "sector-size", 892 ld->sc_secsize); 893 894 prop_dictionary_set_uint16(geom, "sectors-per-track", 895 ld->sc_nsectors); 896 897 prop_dictionary_set_uint16(geom, "tracks-per-cylinder", 898 ld->sc_nheads); 899 900 prop_dictionary_set_uint64(geom, "cylinders-per-unit", 901 ld->sc_ncylinders); 902 903 prop_dictionary_set(disk_info, "geometry", geom); 904 prop_object_release(geom); 905 906 prop_dictionary_set(device_properties(&ld->sc_dv), 907 "disk-info", disk_info); 908 909 /* 910 * Don't release disk_info here; we keep a reference to it. 911 * disk_detach() will release it when we go away. 912 */ 913 914 odisk_info = ld->sc_dk.dk_info; 915 ld->sc_dk.dk_info = disk_info; 916 if (odisk_info) 917 prop_object_release(odisk_info); 918 } 919 920 static void 921 ld_config_interrupts (struct device *d) 922 { 923 struct ld_softc *sc = (struct ld_softc *)d; 924 dkwedge_discover(&sc->sc_dk); 925 } 926
Indexes created Sat Oct 18 08:10:09 GMT 2025