ld.c revision 1.59
1 /* $NetBSD: ld.c,v 1.59 2008/06/11 12:41:22 tsutsui 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Disk driver for use by RAID controllers. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ld.c,v 1.59 2008/06/11 12:41:22 tsutsui Exp $"); 38 39 #include "rnd.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 #include <sys/queue.h> 46 #include <sys/proc.h> 47 #include <sys/buf.h> 48 #include <sys/bufq.h> 49 #include <sys/endian.h> 50 #include <sys/disklabel.h> 51 #include <sys/disk.h> 52 #include <sys/dkio.h> 53 #include <sys/stat.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/vnode.h> 57 #include <sys/syslog.h> 58 #include <sys/mutex.h> 59 #if NRND > 0 60 #include <sys/rnd.h> 61 #endif 62 63 #include <dev/ldvar.h> 64 65 #include <prop/proplib.h> 66 67 static void ldgetdefaultlabel(struct ld_softc *, struct disklabel *); 68 static void ldgetdisklabel(struct ld_softc *); 69 static void ldminphys(struct buf *bp); 70 static bool ld_shutdown(device_t, int); 71 static void ldstart(struct ld_softc *, struct buf *); 72 static void ld_set_properties(struct ld_softc *); 73 static void ld_config_interrupts (struct device *); 74 75 extern struct cfdriver ld_cd; 76 77 static dev_type_open(ldopen); 78 static dev_type_close(ldclose); 79 static dev_type_read(ldread); 80 static dev_type_write(ldwrite); 81 static dev_type_ioctl(ldioctl); 82 static dev_type_strategy(ldstrategy); 83 static dev_type_dump(lddump); 84 static dev_type_size(ldsize); 85 86 const struct bdevsw ld_bdevsw = { 87 ldopen, ldclose, ldstrategy, ldioctl, lddump, ldsize, D_DISK 88 }; 89 90 const struct cdevsw ld_cdevsw = { 91 ldopen, ldclose, ldread, ldwrite, ldioctl, 92 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 93 }; 94 95 static struct dkdriver lddkdriver = { ldstrategy, ldminphys }; 96 97 void 98 ldattach(struct ld_softc *sc) 99 { 100 char tbuf[9]; 101 102 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); 103 104 if ((sc->sc_flags & LDF_ENABLED) == 0) { 105 aprint_normal_dev(&sc->sc_dv, "disabled\n"); 106 return; 107 } 108 109 /* Initialise and attach the disk structure. */ 110 disk_init(&sc->sc_dk, device_xname(&sc->sc_dv), &lddkdriver); 111 disk_attach(&sc->sc_dk); 112 113 if (sc->sc_maxxfer > MAXPHYS) 114 sc->sc_maxxfer = MAXPHYS; 115 116 /* Build synthetic geometry if necessary. */ 117 if (sc->sc_nheads == 0 || sc->sc_nsectors == 0 || 118 sc->sc_ncylinders == 0) { 119 uint64_t ncyl; 120 121 if (sc->sc_secperunit <= 528 * 2048) /* 528MB */ 122 sc->sc_nheads = 16; 123 else if (sc->sc_secperunit <= 1024 * 2048) /* 1GB */ 124 sc->sc_nheads = 32; 125 else if (sc->sc_secperunit <= 21504 * 2048) /* 21GB */ 126 sc->sc_nheads = 64; 127 else if (sc->sc_secperunit <= 43008 * 2048) /* 42GB */ 128 sc->sc_nheads = 128; 129 else 130 sc->sc_nheads = 255; 131 132 sc->sc_nsectors = 63; 133 sc->sc_ncylinders = INT_MAX; 134 ncyl = sc->sc_secperunit / 135 (sc->sc_nheads * sc->sc_nsectors); 136 if (ncyl < INT_MAX) 137 sc->sc_ncylinders = (int)ncyl; 138 } 139 140 format_bytes(tbuf, sizeof(tbuf), sc->sc_secperunit * 141 sc->sc_secsize); 142 aprint_normal_dev(&sc->sc_dv, "%s, %d cyl, %d head, %d sec, %d bytes/sect x %"PRIu64" sectors\n", 143 tbuf, sc->sc_ncylinders, sc->sc_nheads, 144 sc->sc_nsectors, sc->sc_secsize, sc->sc_secperunit); 145 146 ld_set_properties(sc); 147 148 #if NRND > 0 149 /* Attach the device into the rnd source list. */ 150 rnd_attach_source(&sc->sc_rnd_source, device_xname(&sc->sc_dv), 151 RND_TYPE_DISK, 0); 152 #endif 153 154 /* Register with PMF */ 155 if (!pmf_device_register1(&sc->sc_dv, NULL, NULL, ld_shutdown)) 156 aprint_error_dev(&sc->sc_dv, 157 "couldn't establish power handler\n"); 158 159 bufq_alloc(&sc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK); 160 161 /* Discover wedges on this disk. */ 162 config_interrupts(&sc->sc_dv, ld_config_interrupts); 163 } 164 165 int 166 ldadjqparam(struct ld_softc *sc, int xmax) 167 { 168 int s; 169 170 s = splbio(); 171 sc->sc_maxqueuecnt = xmax; 172 splx(s); 173 174 return (0); 175 } 176 177 int 178 ldbegindetach(struct ld_softc *sc, int flags) 179 { 180 int s, rv = 0; 181 182 if ((sc->sc_flags & LDF_ENABLED) == 0) 183 return (0); 184 185 if ((flags & DETACH_FORCE) == 0 && sc->sc_dk.dk_openmask != 0) 186 return (EBUSY); 187 188 s = splbio(); 189 sc->sc_maxqueuecnt = 0; 190 sc->sc_flags |= LDF_DETACH; 191 while (sc->sc_queuecnt > 0) { 192 sc->sc_flags |= LDF_DRAIN; 193 rv = tsleep(&sc->sc_queuecnt, PRIBIO, "lddrn", 0); 194 if (rv) 195 break; 196 } 197 splx(s); 198 199 return (rv); 200 } 201 202 void 203 ldenddetach(struct ld_softc *sc) 204 { 205 int s, bmaj, cmaj, i, mn; 206 207 if ((sc->sc_flags & LDF_ENABLED) == 0) 208 return; 209 210 /* Wait for commands queued with the hardware to complete. */ 211 if (sc->sc_queuecnt != 0) 212 if (tsleep(&sc->sc_queuecnt, PRIBIO, "lddtch", 30 * hz)) 213 printf("%s: not drained\n", device_xname(&sc->sc_dv)); 214 215 /* Locate the major numbers. */ 216 bmaj = bdevsw_lookup_major(&ld_bdevsw); 217 cmaj = cdevsw_lookup_major(&ld_cdevsw); 218 219 /* Kill off any queued buffers. */ 220 s = splbio(); 221 bufq_drain(sc->sc_bufq); 222 splx(s); 223 224 bufq_free(sc->sc_bufq); 225 226 /* Nuke the vnodes for any open instances. */ 227 for (i = 0; i < MAXPARTITIONS; i++) { 228 mn = DISKMINOR(device_unit(&sc->sc_dv), i); 229 vdevgone(bmaj, mn, mn, VBLK); 230 vdevgone(cmaj, mn, mn, VCHR); 231 } 232 233 /* Delete all of our wedges. */ 234 dkwedge_delall(&sc->sc_dk); 235 236 /* Detach from the disk list. */ 237 disk_detach(&sc->sc_dk); 238 disk_destroy(&sc->sc_dk); 239 240 #if NRND > 0 241 /* Unhook the entropy source. */ 242 rnd_detach_source(&sc->sc_rnd_source); 243 #endif 244 245 /* Deregister with PMF */ 246 pmf_device_deregister(&sc->sc_dv); 247 248 /* 249 * XXX We can't really flush the cache here, beceause the 250 * XXX device may already be non-existent from the controller's 251 * XXX perspective. 252 */ 253 #if 0 254 /* Flush the device's cache. */ 255 if (sc->sc_flush != NULL) 256 if ((*sc->sc_flush)(sc) != 0) 257 aprint_error_dev(&sc->sc_dv, "unable to flush cache\n"); 258 #endif 259 } 260 261 /* ARGSUSED */ 262 static bool 263 ld_shutdown(device_t dev, int flags) 264 { 265 struct ld_softc *sc = device_private(dev); 266 267 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) { 268 printf("%s: unable to flush cache\n", device_xname(dev)); 269 return false; 270 } 271 272 return true; 273 } 274 275 /* ARGSUSED */ 276 static int 277 ldopen(dev_t dev, int flags, int fmt, struct lwp *l) 278 { 279 struct ld_softc *sc; 280 int error, unit, part; 281 282 unit = DISKUNIT(dev); 283 if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) 284 return (ENXIO); 285 if ((sc->sc_flags & LDF_ENABLED) == 0) 286 return (ENODEV); 287 part = DISKPART(dev); 288 289 mutex_enter(&sc->sc_dk.dk_openlock); 290 291 if (sc->sc_dk.dk_openmask == 0) { 292 /* Load the partition info if not already loaded. */ 293 if ((sc->sc_flags & LDF_VLABEL) == 0) 294 ldgetdisklabel(sc); 295 } 296 297 /* Check that the partition exists. */ 298 if (part != RAW_PART && (part >= sc->sc_dk.dk_label->d_npartitions || 299 sc->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 300 error = ENXIO; 301 goto bad1; 302 } 303 304 /* Ensure only one open at a time. */ 305 switch (fmt) { 306 case S_IFCHR: 307 sc->sc_dk.dk_copenmask |= (1 << part); 308 break; 309 case S_IFBLK: 310 sc->sc_dk.dk_bopenmask |= (1 << part); 311 break; 312 } 313 sc->sc_dk.dk_openmask = 314 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 315 316 error = 0; 317 bad1: 318 mutex_exit(&sc->sc_dk.dk_openlock); 319 return (error); 320 } 321 322 /* ARGSUSED */ 323 static int 324 ldclose(dev_t dev, int flags, int fmt, struct lwp *l) 325 { 326 struct ld_softc *sc; 327 int part, unit; 328 329 unit = DISKUNIT(dev); 330 part = DISKPART(dev); 331 sc = device_lookup_private(&ld_cd, unit); 332 333 mutex_enter(&sc->sc_dk.dk_openlock); 334 335 switch (fmt) { 336 case S_IFCHR: 337 sc->sc_dk.dk_copenmask &= ~(1 << part); 338 break; 339 case S_IFBLK: 340 sc->sc_dk.dk_bopenmask &= ~(1 << part); 341 break; 342 } 343 sc->sc_dk.dk_openmask = 344 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 345 346 if (sc->sc_dk.dk_openmask == 0) { 347 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) 348 aprint_error_dev(&sc->sc_dv, "unable to flush cache\n"); 349 if ((sc->sc_flags & LDF_KLABEL) == 0) 350 sc->sc_flags &= ~LDF_VLABEL; 351 } 352 353 mutex_exit(&sc->sc_dk.dk_openlock); 354 return (0); 355 } 356 357 /* ARGSUSED */ 358 static int 359 ldread(dev_t dev, struct uio *uio, int ioflag) 360 { 361 362 return (physio(ldstrategy, NULL, dev, B_READ, ldminphys, uio)); 363 } 364 365 /* ARGSUSED */ 366 static int 367 ldwrite(dev_t dev, struct uio *uio, int ioflag) 368 { 369 370 return (physio(ldstrategy, NULL, dev, B_WRITE, ldminphys, uio)); 371 } 372 373 /* ARGSUSED */ 374 static int 375 ldioctl(dev_t dev, u_long cmd, void *addr, int32_t flag, struct lwp *l) 376 { 377 struct ld_softc *sc; 378 int part, unit, error; 379 #ifdef __HAVE_OLD_DISKLABEL 380 struct disklabel newlabel; 381 #endif 382 struct disklabel *lp; 383 384 unit = DISKUNIT(dev); 385 part = DISKPART(dev); 386 sc = device_lookup_private(&ld_cd, unit); 387 388 error = disk_ioctl(&sc->sc_dk, cmd, addr, flag, l); 389 if (error != EPASSTHROUGH) 390 return (error); 391 392 error = 0; 393 switch (cmd) { 394 case DIOCGDINFO: 395 memcpy(addr, sc->sc_dk.dk_label, sizeof(struct disklabel)); 396 return (0); 397 398 #ifdef __HAVE_OLD_DISKLABEL 399 case ODIOCGDINFO: 400 newlabel = *(sc->sc_dk.dk_label); 401 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 402 return ENOTTY; 403 memcpy(addr, &newlabel, sizeof(struct olddisklabel)); 404 return (0); 405 #endif 406 407 case DIOCGPART: 408 ((struct partinfo *)addr)->disklab = sc->sc_dk.dk_label; 409 ((struct partinfo *)addr)->part = 410 &sc->sc_dk.dk_label->d_partitions[part]; 411 break; 412 413 case DIOCWDINFO: 414 case DIOCSDINFO: 415 #ifdef __HAVE_OLD_DISKLABEL 416 case ODIOCWDINFO: 417 case ODIOCSDINFO: 418 419 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 420 memset(&newlabel, 0, sizeof newlabel); 421 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 422 lp = &newlabel; 423 } else 424 #endif 425 lp = (struct disklabel *)addr; 426 427 if ((flag & FWRITE) == 0) 428 return (EBADF); 429 430 mutex_enter(&sc->sc_dk.dk_openlock); 431 sc->sc_flags |= LDF_LABELLING; 432 433 error = setdisklabel(sc->sc_dk.dk_label, 434 lp, /*sc->sc_dk.dk_openmask : */0, 435 sc->sc_dk.dk_cpulabel); 436 if (error == 0 && (cmd == DIOCWDINFO 437 #ifdef __HAVE_OLD_DISKLABEL 438 || cmd == ODIOCWDINFO 439 #endif 440 )) 441 error = writedisklabel( 442 MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 443 ldstrategy, sc->sc_dk.dk_label, 444 sc->sc_dk.dk_cpulabel); 445 446 sc->sc_flags &= ~LDF_LABELLING; 447 mutex_exit(&sc->sc_dk.dk_openlock); 448 break; 449 450 case DIOCKLABEL: 451 if ((flag & FWRITE) == 0) 452 return (EBADF); 453 if (*(int *)addr) 454 sc->sc_flags |= LDF_KLABEL; 455 else 456 sc->sc_flags &= ~LDF_KLABEL; 457 break; 458 459 case DIOCWLABEL: 460 if ((flag & FWRITE) == 0) 461 return (EBADF); 462 if (*(int *)addr) 463 sc->sc_flags |= LDF_WLABEL; 464 else 465 sc->sc_flags &= ~LDF_WLABEL; 466 break; 467 468 case DIOCGDEFLABEL: 469 ldgetdefaultlabel(sc, (struct disklabel *)addr); 470 break; 471 472 #ifdef __HAVE_OLD_DISKLABEL 473 case ODIOCGDEFLABEL: 474 ldgetdefaultlabel(sc, &newlabel); 475 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 476 return ENOTTY; 477 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 478 break; 479 #endif 480 481 case DIOCCACHESYNC: 482 /* 483 * XXX Do we really need to care about having a writable 484 * file descriptor here? 485 */ 486 if ((flag & FWRITE) == 0) 487 error = EBADF; 488 else if (sc->sc_flush) 489 error = (*sc->sc_flush)(sc); 490 else 491 error = 0; /* XXX Error out instead? */ 492 break; 493 494 case DIOCAWEDGE: 495 { 496 struct dkwedge_info *dkw = (void *) addr; 497 498 if ((flag & FWRITE) == 0) 499 return (EBADF); 500 501 /* If the ioctl happens here, the parent is us. */ 502 strlcpy(dkw->dkw_parent, device_xname(&sc->sc_dv), 503 sizeof(dkw->dkw_parent)); 504 return (dkwedge_add(dkw)); 505 } 506 507 case DIOCDWEDGE: 508 { 509 struct dkwedge_info *dkw = (void *) addr; 510 511 if ((flag & FWRITE) == 0) 512 return (EBADF); 513 514 /* If the ioctl happens here, the parent is us. */ 515 strlcpy(dkw->dkw_parent, device_xname(&sc->sc_dv), 516 sizeof(dkw->dkw_parent)); 517 return (dkwedge_del(dkw)); 518 } 519 520 case DIOCLWEDGES: 521 { 522 struct dkwedge_list *dkwl = (void *) addr; 523 524 return (dkwedge_list(&sc->sc_dk, dkwl, l)); 525 } 526 case DIOCGSTRATEGY: 527 { 528 struct disk_strategy *dks = (void *)addr; 529 530 mutex_enter(&sc->sc_mutex); 531 strlcpy(dks->dks_name, bufq_getstrategyname(sc->sc_bufq), 532 sizeof(dks->dks_name)); 533 mutex_exit(&sc->sc_mutex); 534 dks->dks_paramlen = 0; 535 536 return 0; 537 } 538 case DIOCSSTRATEGY: 539 { 540 struct disk_strategy *dks = (void *)addr; 541 struct bufq_state *new, *old; 542 543 if ((flag & FWRITE) == 0) 544 return EPERM; 545 546 if (dks->dks_param != NULL) 547 return EINVAL; 548 549 dks->dks_name[sizeof(dks->dks_name) - 1] = 0; /* ensure term */ 550 error = bufq_alloc(&new, dks->dks_name, 551 BUFQ_EXACT|BUFQ_SORT_RAWBLOCK); 552 if (error) 553 return error; 554 555 mutex_enter(&sc->sc_mutex); 556 old = sc->sc_bufq; 557 bufq_move(new, old); 558 sc->sc_bufq = new; 559 mutex_exit(&sc->sc_mutex); 560 bufq_free(old); 561 562 return 0; 563 } 564 default: 565 error = ENOTTY; 566 break; 567 } 568 569 return (error); 570 } 571 572 static void 573 ldstrategy(struct buf *bp) 574 { 575 struct ld_softc *sc; 576 struct disklabel *lp; 577 daddr_t blkno; 578 int s, part; 579 580 sc = device_lookup_private(&ld_cd, DISKUNIT(bp->b_dev)); 581 part = DISKPART(bp->b_dev); 582 583 if ((sc->sc_flags & LDF_DETACH) != 0) { 584 bp->b_error = EIO; 585 goto done; 586 } 587 588 lp = sc->sc_dk.dk_label; 589 590 /* 591 * The transfer must be a whole number of blocks and the offset must 592 * not be negative. 593 */ 594 if ((bp->b_bcount % lp->d_secsize) != 0 || bp->b_blkno < 0) { 595 bp->b_error = EINVAL; 596 goto done; 597 } 598 599 /* If it's a null transfer, return immediately. */ 600 if (bp->b_bcount == 0) 601 goto done; 602 603 /* 604 * Do bounds checking and adjust the transfer. If error, process. 605 * If past the end of partition, just return. 606 */ 607 if (part != RAW_PART && 608 bounds_check_with_label(&sc->sc_dk, bp, 609 (sc->sc_flags & (LDF_WLABEL | LDF_LABELLING)) != 0) <= 0) { 610 goto done; 611 } 612 613 /* 614 * Convert the block number to absolute and put it in terms 615 * of the device's logical block size. 616 */ 617 if (lp->d_secsize == DEV_BSIZE) 618 blkno = bp->b_blkno; 619 else if (lp->d_secsize > DEV_BSIZE) 620 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 621 else 622 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 623 624 if (part != RAW_PART) 625 blkno += lp->d_partitions[part].p_offset; 626 627 bp->b_rawblkno = blkno; 628 629 s = splbio(); 630 ldstart(sc, bp); 631 splx(s); 632 return; 633 634 done: 635 bp->b_resid = bp->b_bcount; 636 biodone(bp); 637 } 638 639 static void 640 ldstart(struct ld_softc *sc, struct buf *bp) 641 { 642 int error; 643 644 mutex_enter(&sc->sc_mutex); 645 646 if (bp != NULL) 647 BUFQ_PUT(sc->sc_bufq, bp); 648 649 while (sc->sc_queuecnt < sc->sc_maxqueuecnt) { 650 /* See if there is work to do. */ 651 if ((bp = BUFQ_PEEK(sc->sc_bufq)) == NULL) 652 break; 653 654 disk_busy(&sc->sc_dk); 655 sc->sc_queuecnt++; 656 657 if (__predict_true((error = (*sc->sc_start)(sc, bp)) == 0)) { 658 /* 659 * The back-end is running the job; remove it from 660 * the queue. 661 */ 662 (void) BUFQ_GET(sc->sc_bufq); 663 } else { 664 disk_unbusy(&sc->sc_dk, 0, (bp->b_flags & B_READ)); 665 sc->sc_queuecnt--; 666 if (error == EAGAIN) { 667 /* 668 * Temporary resource shortage in the 669 * back-end; just defer the job until 670 * later. 671 * 672 * XXX We might consider a watchdog timer 673 * XXX to make sure we are kicked into action. 674 */ 675 break; 676 } else { 677 (void) BUFQ_GET(sc->sc_bufq); 678 bp->b_error = error; 679 bp->b_resid = bp->b_bcount; 680 mutex_exit(&sc->sc_mutex); 681 biodone(bp); 682 mutex_enter(&sc->sc_mutex); 683 } 684 } 685 } 686 687 mutex_exit(&sc->sc_mutex); 688 } 689 690 void 691 lddone(struct ld_softc *sc, struct buf *bp) 692 { 693 694 if (bp->b_error != 0) { 695 diskerr(bp, "ld", "error", LOG_PRINTF, 0, sc->sc_dk.dk_label); 696 printf("\n"); 697 } 698 699 disk_unbusy(&sc->sc_dk, bp->b_bcount - bp->b_resid, 700 (bp->b_flags & B_READ)); 701 #if NRND > 0 702 rnd_add_uint32(&sc->sc_rnd_source, bp->b_rawblkno); 703 #endif 704 biodone(bp); 705 706 mutex_enter(&sc->sc_mutex); 707 if (--sc->sc_queuecnt <= sc->sc_maxqueuecnt) { 708 if ((sc->sc_flags & LDF_DRAIN) != 0) { 709 sc->sc_flags &= ~LDF_DRAIN; 710 wakeup(&sc->sc_queuecnt); 711 } 712 mutex_exit(&sc->sc_mutex); 713 ldstart(sc, NULL); 714 } else 715 mutex_exit(&sc->sc_mutex); 716 } 717 718 static int 719 ldsize(dev_t dev) 720 { 721 struct ld_softc *sc; 722 int part, unit, omask, size; 723 724 unit = DISKUNIT(dev); 725 if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) 726 return (ENODEV); 727 if ((sc->sc_flags & LDF_ENABLED) == 0) 728 return (ENODEV); 729 part = DISKPART(dev); 730 731 omask = sc->sc_dk.dk_openmask & (1 << part); 732 733 if (omask == 0 && ldopen(dev, 0, S_IFBLK, NULL) != 0) 734 return (-1); 735 else if (sc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 736 size = -1; 737 else 738 size = sc->sc_dk.dk_label->d_partitions[part].p_size * 739 (sc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 740 if (omask == 0 && ldclose(dev, 0, S_IFBLK, NULL) != 0) 741 return (-1); 742 743 return (size); 744 } 745 746 /* 747 * Load the label information from the specified device. 748 */ 749 static void 750 ldgetdisklabel(struct ld_softc *sc) 751 { 752 const char *errstring; 753 754 ldgetdefaultlabel(sc, sc->sc_dk.dk_label); 755 756 /* Call the generic disklabel extraction routine. */ 757 errstring = readdisklabel(MAKEDISKDEV(0, device_unit(&sc->sc_dv), 758 RAW_PART), ldstrategy, sc->sc_dk.dk_label, sc->sc_dk.dk_cpulabel); 759 if (errstring != NULL) 760 printf("%s: %s\n", device_xname(&sc->sc_dv), errstring); 761 762 /* In-core label now valid. */ 763 sc->sc_flags |= LDF_VLABEL; 764 } 765 766 /* 767 * Construct a ficticious label. 768 */ 769 static void 770 ldgetdefaultlabel(struct ld_softc *sc, struct disklabel *lp) 771 { 772 773 memset(lp, 0, sizeof(struct disklabel)); 774 775 lp->d_secsize = sc->sc_secsize; 776 lp->d_ntracks = sc->sc_nheads; 777 lp->d_nsectors = sc->sc_nsectors; 778 lp->d_ncylinders = sc->sc_ncylinders; 779 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 780 lp->d_type = DTYPE_LD; 781 strlcpy(lp->d_typename, "unknown", sizeof(lp->d_typename)); 782 strlcpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 783 lp->d_secperunit = sc->sc_secperunit; 784 lp->d_rpm = 7200; 785 lp->d_interleave = 1; 786 lp->d_flags = 0; 787 788 lp->d_partitions[RAW_PART].p_offset = 0; 789 lp->d_partitions[RAW_PART].p_size = 790 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 791 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 792 lp->d_npartitions = RAW_PART + 1; 793 794 lp->d_magic = DISKMAGIC; 795 lp->d_magic2 = DISKMAGIC; 796 lp->d_checksum = dkcksum(lp); 797 } 798 799 /* 800 * Take a dump. 801 */ 802 static int 803 lddump(dev_t dev, daddr_t blkno, void *vav, size_t size) 804 { 805 char *va = vav; 806 struct ld_softc *sc; 807 struct disklabel *lp; 808 int unit, part, nsects, sectoff, towrt, nblk, maxblkcnt, rv; 809 static int dumping; 810 811 unit = DISKUNIT(dev); 812 if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) 813 return (ENXIO); 814 if ((sc->sc_flags & LDF_ENABLED) == 0) 815 return (ENODEV); 816 if (sc->sc_dump == NULL) 817 return (ENXIO); 818 819 /* Check if recursive dump; if so, punt. */ 820 if (dumping) 821 return (EFAULT); 822 dumping = 1; 823 824 /* Convert to disk sectors. Request must be a multiple of size. */ 825 part = DISKPART(dev); 826 lp = sc->sc_dk.dk_label; 827 if ((size % lp->d_secsize) != 0) 828 return (EFAULT); 829 towrt = size / lp->d_secsize; 830 blkno = dbtob(blkno) / lp->d_secsize; /* blkno in DEV_BSIZE units */ 831 832 nsects = lp->d_partitions[part].p_size; 833 sectoff = lp->d_partitions[part].p_offset; 834 835 /* Check transfer bounds against partition size. */ 836 if ((blkno < 0) || ((blkno + towrt) > nsects)) 837 return (EINVAL); 838 839 /* Offset block number to start of partition. */ 840 blkno += sectoff; 841 842 /* Start dumping and return when done. */ 843 maxblkcnt = sc->sc_maxxfer / sc->sc_secsize - 1; 844 while (towrt > 0) { 845 nblk = min(maxblkcnt, towrt); 846 847 if ((rv = (*sc->sc_dump)(sc, va, blkno, nblk)) != 0) 848 return (rv); 849 850 towrt -= nblk; 851 blkno += nblk; 852 va += nblk * sc->sc_secsize; 853 } 854 855 dumping = 0; 856 return (0); 857 } 858 859 /* 860 * Adjust the size of a transfer. 861 */ 862 static void 863 ldminphys(struct buf *bp) 864 { 865 struct ld_softc *sc; 866 867 sc = device_lookup_private(&ld_cd, DISKUNIT(bp->b_dev)); 868 869 if (bp->b_bcount > sc->sc_maxxfer) 870 bp->b_bcount = sc->sc_maxxfer; 871 minphys(bp); 872 } 873 874 static void 875 ld_set_properties(struct ld_softc *ld) 876 { 877 prop_dictionary_t disk_info, odisk_info, geom; 878 879 disk_info = prop_dictionary_create(); 880 881 geom = prop_dictionary_create(); 882 883 prop_dictionary_set_uint64(geom, "sectors-per-unit", 884 ld->sc_secperunit); 885 886 prop_dictionary_set_uint32(geom, "sector-size", 887 ld->sc_secsize); 888 889 prop_dictionary_set_uint16(geom, "sectors-per-track", 890 ld->sc_nsectors); 891 892 prop_dictionary_set_uint16(geom, "tracks-per-cylinder", 893 ld->sc_nheads); 894 895 prop_dictionary_set_uint64(geom, "cylinders-per-unit", 896 ld->sc_ncylinders); 897 898 prop_dictionary_set(disk_info, "geometry", geom); 899 prop_object_release(geom); 900 901 prop_dictionary_set(device_properties(&ld->sc_dv), 902 "disk-info", disk_info); 903 904 /* 905 * Don't release disk_info here; we keep a reference to it. 906 * disk_detach() will release it when we go away. 907 */ 908 909 odisk_info = ld->sc_dk.dk_info; 910 ld->sc_dk.dk_info = disk_info; 911 if (odisk_info) 912 prop_object_release(odisk_info); 913 } 914 915 static void 916 ld_config_interrupts (struct device *d) 917 { 918 struct ld_softc *sc = (struct ld_softc *)d; 919 dkwedge_discover(&sc->sc_dk); 920 } 921
Indexes created Thu Sep 25 08:09:54 GMT 2025