ld.c revision 1.48
1 /* $NetBSD: ld.c,v 1.48 2007/07/21 19:51:47 ad 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 1.48 2007/07/21 19:51:47 ad 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/lock.h> 62 #include <sys/conf.h> 63 #include <sys/fcntl.h> 64 #include <sys/vnode.h> 65 #include <sys/syslog.h> 66 #include <sys/mutex.h> 67 #if NRND > 0 68 #include <sys/rnd.h> 69 #endif 70 71 #include <dev/ldvar.h> 72 73 #include <prop/proplib.h> 74 75 static void ldgetdefaultlabel(struct ld_softc *, struct disklabel *); 76 static void ldgetdisklabel(struct ld_softc *); 77 static void ldminphys(struct buf *bp); 78 static void ldshutdown(void *); 79 static void ldstart(struct ld_softc *, struct buf *); 80 static void ld_set_properties(struct ld_softc *); 81 static void ld_config_interrupts (struct device *); 82 83 extern struct cfdriver ld_cd; 84 85 static dev_type_open(ldopen); 86 static dev_type_close(ldclose); 87 static dev_type_read(ldread); 88 static dev_type_write(ldwrite); 89 static dev_type_ioctl(ldioctl); 90 static dev_type_strategy(ldstrategy); 91 static dev_type_dump(lddump); 92 static dev_type_size(ldsize); 93 94 const struct bdevsw ld_bdevsw = { 95 ldopen, ldclose, ldstrategy, ldioctl, lddump, ldsize, D_DISK 96 }; 97 98 const struct cdevsw ld_cdevsw = { 99 ldopen, ldclose, ldread, ldwrite, ldioctl, 100 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 101 }; 102 103 static struct dkdriver lddkdriver = { ldstrategy, ldminphys }; 104 static void *ld_sdh; 105 106 void 107 ldattach(struct ld_softc *sc) 108 { 109 char tbuf[9]; 110 111 mutex_init(&sc->sc_mutex, MUTEX_DRIVER, IPL_BIO); 112 113 if ((sc->sc_flags & LDF_ENABLED) == 0) { 114 aprint_normal("%s: disabled\n", sc->sc_dv.dv_xname); 115 return; 116 } 117 118 /* Initialise and attach the disk structure. */ 119 sc->sc_dk.dk_driver = &lddkdriver; 120 sc->sc_dk.dk_name = sc->sc_dv.dv_xname; 121 disk_attach(&sc->sc_dk); 122 123 if (sc->sc_maxxfer > MAXPHYS) 124 sc->sc_maxxfer = MAXPHYS; 125 126 /* Build synthetic geometry if necessary. */ 127 if (sc->sc_nheads == 0 || sc->sc_nsectors == 0 || 128 sc->sc_ncylinders == 0) { 129 uint64_t ncyl; 130 131 if (sc->sc_secperunit <= 528 * 2048) /* 528MB */ 132 sc->sc_nheads = 16; 133 else if (sc->sc_secperunit <= 1024 * 2048) /* 1GB */ 134 sc->sc_nheads = 32; 135 else if (sc->sc_secperunit <= 21504 * 2048) /* 21GB */ 136 sc->sc_nheads = 64; 137 else if (sc->sc_secperunit <= 43008 * 2048) /* 42GB */ 138 sc->sc_nheads = 128; 139 else 140 sc->sc_nheads = 255; 141 142 sc->sc_nsectors = 63; 143 sc->sc_ncylinders = INT_MAX; 144 ncyl = sc->sc_secperunit / 145 (sc->sc_nheads * sc->sc_nsectors); 146 if (ncyl < INT_MAX) 147 sc->sc_ncylinders = (int)ncyl; 148 } 149 150 format_bytes(tbuf, sizeof(tbuf), sc->sc_secperunit * 151 sc->sc_secsize); 152 aprint_normal("%s: %s, %d cyl, %d head, %d sec, %d bytes/sect x %"PRIu64" sectors\n", 153 sc->sc_dv.dv_xname, tbuf, sc->sc_ncylinders, sc->sc_nheads, 154 sc->sc_nsectors, sc->sc_secsize, sc->sc_secperunit); 155 156 ld_set_properties(sc); 157 158 #if NRND > 0 159 /* Attach the device into the rnd source list. */ 160 rnd_attach_source(&sc->sc_rnd_source, sc->sc_dv.dv_xname, 161 RND_TYPE_DISK, 0); 162 #endif 163 164 /* Set the `shutdownhook'. */ 165 if (ld_sdh == NULL) 166 ld_sdh = shutdownhook_establish(ldshutdown, NULL); 167 bufq_alloc(&sc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK); 168 169 /* Discover wedges on this disk. */ 170 config_interrupts(&sc->sc_dv, ld_config_interrupts); 171 } 172 173 int 174 ldadjqparam(struct ld_softc *sc, int xmax) 175 { 176 int s; 177 178 s = splbio(); 179 sc->sc_maxqueuecnt = xmax; 180 splx(s); 181 182 return (0); 183 } 184 185 int 186 ldbegindetach(struct ld_softc *sc, int flags) 187 { 188 int s, rv = 0; 189 190 if ((sc->sc_flags & LDF_ENABLED) == 0) 191 return (0); 192 193 if ((flags & DETACH_FORCE) == 0 && sc->sc_dk.dk_openmask != 0) 194 return (EBUSY); 195 196 s = splbio(); 197 sc->sc_maxqueuecnt = 0; 198 sc->sc_flags |= LDF_DETACH; 199 while (sc->sc_queuecnt > 0) { 200 sc->sc_flags |= LDF_DRAIN; 201 rv = tsleep(&sc->sc_queuecnt, PRIBIO, "lddrn", 0); 202 if (rv) 203 break; 204 } 205 splx(s); 206 207 return (rv); 208 } 209 210 void 211 ldenddetach(struct ld_softc *sc) 212 { 213 int s, bmaj, cmaj, i, mn; 214 215 if ((sc->sc_flags & LDF_ENABLED) == 0) 216 return; 217 218 /* Wait for commands queued with the hardware to complete. */ 219 if (sc->sc_queuecnt != 0) 220 if (tsleep(&sc->sc_queuecnt, PRIBIO, "lddtch", 30 * hz)) 221 printf("%s: not drained\n", sc->sc_dv.dv_xname); 222 223 /* Locate the major numbers. */ 224 bmaj = bdevsw_lookup_major(&ld_bdevsw); 225 cmaj = cdevsw_lookup_major(&ld_cdevsw); 226 227 /* Kill off any queued buffers. */ 228 s = splbio(); 229 bufq_drain(sc->sc_bufq); 230 splx(s); 231 232 bufq_free(sc->sc_bufq); 233 234 /* Nuke the vnodes for any open instances. */ 235 for (i = 0; i < MAXPARTITIONS; i++) { 236 mn = DISKMINOR(device_unit(&sc->sc_dv), i); 237 vdevgone(bmaj, mn, mn, VBLK); 238 vdevgone(cmaj, mn, mn, VCHR); 239 } 240 241 /* Delete all of our wedges. */ 242 dkwedge_delall(&sc->sc_dk); 243 244 /* Detach from the disk list. */ 245 disk_detach(&sc->sc_dk); 246 247 #if NRND > 0 248 /* Unhook the entropy source. */ 249 rnd_detach_source(&sc->sc_rnd_source); 250 #endif 251 252 /* 253 * XXX We can't really flush the cache here, beceause the 254 * XXX device may already be non-existent from the controller's 255 * XXX perspective. 256 */ 257 #if 0 258 /* Flush the device's cache. */ 259 if (sc->sc_flush != NULL) 260 if ((*sc->sc_flush)(sc) != 0) 261 printf("%s: unable to flush cache\n", 262 sc->sc_dv.dv_xname); 263 #endif 264 } 265 266 /* ARGSUSED */ 267 static void 268 ldshutdown(void *cookie) 269 { 270 struct ld_softc *sc; 271 int i; 272 273 for (i = 0; i < ld_cd.cd_ndevs; i++) { 274 if ((sc = device_lookup(&ld_cd, i)) == NULL) 275 continue; 276 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) 277 printf("%s: unable to flush cache\n", 278 sc->sc_dv.dv_xname); 279 } 280 } 281 282 /* ARGSUSED */ 283 static int 284 ldopen(dev_t dev, int flags, int fmt, struct lwp *l) 285 { 286 struct ld_softc *sc; 287 int error, unit, part; 288 289 unit = DISKUNIT(dev); 290 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 291 return (ENXIO); 292 if ((sc->sc_flags & LDF_ENABLED) == 0) 293 return (ENODEV); 294 part = DISKPART(dev); 295 296 mutex_enter(&sc->sc_dk.dk_openlock); 297 298 if (sc->sc_dk.dk_openmask == 0) { 299 /* Load the partition info if not already loaded. */ 300 if ((sc->sc_flags & LDF_VLABEL) == 0) 301 ldgetdisklabel(sc); 302 } 303 304 /* Check that the partition exists. */ 305 if (part != RAW_PART && (part >= sc->sc_dk.dk_label->d_npartitions || 306 sc->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 307 error = ENXIO; 308 goto bad1; 309 } 310 311 /* Ensure only one open at a time. */ 312 switch (fmt) { 313 case S_IFCHR: 314 sc->sc_dk.dk_copenmask |= (1 << part); 315 break; 316 case S_IFBLK: 317 sc->sc_dk.dk_bopenmask |= (1 << part); 318 break; 319 } 320 sc->sc_dk.dk_openmask = 321 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 322 323 error = 0; 324 bad1: 325 mutex_exit(&sc->sc_dk.dk_openlock); 326 return (error); 327 } 328 329 /* ARGSUSED */ 330 static int 331 ldclose(dev_t dev, int flags, int fmt, struct lwp *l) 332 { 333 struct ld_softc *sc; 334 int part, unit; 335 336 unit = DISKUNIT(dev); 337 part = DISKPART(dev); 338 sc = device_lookup(&ld_cd, unit); 339 340 mutex_enter(&sc->sc_dk.dk_openlock); 341 342 switch (fmt) { 343 case S_IFCHR: 344 sc->sc_dk.dk_copenmask &= ~(1 << part); 345 break; 346 case S_IFBLK: 347 sc->sc_dk.dk_bopenmask &= ~(1 << part); 348 break; 349 } 350 sc->sc_dk.dk_openmask = 351 sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask; 352 353 if (sc->sc_dk.dk_openmask == 0) { 354 if (sc->sc_flush != NULL && (*sc->sc_flush)(sc) != 0) 355 printf("%s: unable to flush cache\n", 356 sc->sc_dv.dv_xname); 357 if ((sc->sc_flags & LDF_KLABEL) == 0) 358 sc->sc_flags &= ~LDF_VLABEL; 359 } 360 361 mutex_exit(&sc->sc_dk.dk_openlock); 362 return (0); 363 } 364 365 /* ARGSUSED */ 366 static int 367 ldread(dev_t dev, struct uio *uio, int ioflag) 368 { 369 370 return (physio(ldstrategy, NULL, dev, B_READ, ldminphys, uio)); 371 } 372 373 /* ARGSUSED */ 374 static int 375 ldwrite(dev_t dev, struct uio *uio, int ioflag) 376 { 377 378 return (physio(ldstrategy, NULL, dev, B_WRITE, ldminphys, uio)); 379 } 380 381 /* ARGSUSED */ 382 static int 383 ldioctl(dev_t dev, u_long cmd, void *addr, int32_t flag, struct lwp *l) 384 { 385 struct ld_softc *sc; 386 int part, unit, error; 387 #ifdef __HAVE_OLD_DISKLABEL 388 struct disklabel newlabel; 389 #endif 390 struct disklabel *lp; 391 392 unit = DISKUNIT(dev); 393 part = DISKPART(dev); 394 sc = device_lookup(&ld_cd, unit); 395 396 error = disk_ioctl(&sc->sc_dk, cmd, addr, flag, l); 397 if (error != EPASSTHROUGH) 398 return (error); 399 400 error = 0; 401 switch (cmd) { 402 case DIOCGDINFO: 403 memcpy(addr, sc->sc_dk.dk_label, sizeof(struct disklabel)); 404 return (0); 405 406 #ifdef __HAVE_OLD_DISKLABEL 407 case ODIOCGDINFO: 408 newlabel = *(sc->sc_dk.dk_label); 409 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 410 return ENOTTY; 411 memcpy(addr, &newlabel, sizeof(struct olddisklabel)); 412 return (0); 413 #endif 414 415 case DIOCGPART: 416 ((struct partinfo *)addr)->disklab = sc->sc_dk.dk_label; 417 ((struct partinfo *)addr)->part = 418 &sc->sc_dk.dk_label->d_partitions[part]; 419 break; 420 421 case DIOCWDINFO: 422 case DIOCSDINFO: 423 #ifdef __HAVE_OLD_DISKLABEL 424 case ODIOCWDINFO: 425 case ODIOCSDINFO: 426 427 if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { 428 memset(&newlabel, 0, sizeof newlabel); 429 memcpy(&newlabel, addr, sizeof (struct olddisklabel)); 430 lp = &newlabel; 431 } else 432 #endif 433 lp = (struct disklabel *)addr; 434 435 if ((flag & FWRITE) == 0) 436 return (EBADF); 437 438 mutex_enter(&sc->sc_dk.dk_openlock); 439 sc->sc_flags |= LDF_LABELLING; 440 441 error = setdisklabel(sc->sc_dk.dk_label, 442 lp, /*sc->sc_dk.dk_openmask : */0, 443 sc->sc_dk.dk_cpulabel); 444 if (error == 0 && (cmd == DIOCWDINFO 445 #ifdef __HAVE_OLD_DISKLABEL 446 || cmd == ODIOCWDINFO 447 #endif 448 )) 449 error = writedisklabel( 450 MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART), 451 ldstrategy, sc->sc_dk.dk_label, 452 sc->sc_dk.dk_cpulabel); 453 454 sc->sc_flags &= ~LDF_LABELLING; 455 mutex_exit(&sc->sc_dk.dk_openlock); 456 break; 457 458 case DIOCKLABEL: 459 if ((flag & FWRITE) == 0) 460 return (EBADF); 461 if (*(int *)addr) 462 sc->sc_flags |= LDF_KLABEL; 463 else 464 sc->sc_flags &= ~LDF_KLABEL; 465 break; 466 467 case DIOCWLABEL: 468 if ((flag & FWRITE) == 0) 469 return (EBADF); 470 if (*(int *)addr) 471 sc->sc_flags |= LDF_WLABEL; 472 else 473 sc->sc_flags &= ~LDF_WLABEL; 474 break; 475 476 case DIOCGDEFLABEL: 477 ldgetdefaultlabel(sc, (struct disklabel *)addr); 478 break; 479 480 #ifdef __HAVE_OLD_DISKLABEL 481 case ODIOCGDEFLABEL: 482 ldgetdefaultlabel(sc, &newlabel); 483 if (newlabel.d_npartitions > OLDMAXPARTITIONS) 484 return ENOTTY; 485 memcpy(addr, &newlabel, sizeof (struct olddisklabel)); 486 break; 487 #endif 488 489 case DIOCCACHESYNC: 490 /* 491 * XXX Do we really need to care about having a writable 492 * file descriptor here? 493 */ 494 if ((flag & FWRITE) == 0) 495 error = EBADF; 496 else if (sc->sc_flush) 497 error = (*sc->sc_flush)(sc); 498 else 499 error = 0; /* XXX Error out instead? */ 500 break; 501 502 case DIOCAWEDGE: 503 { 504 struct dkwedge_info *dkw = (void *) addr; 505 506 if ((flag & FWRITE) == 0) 507 return (EBADF); 508 509 /* If the ioctl happens here, the parent is us. */ 510 strcpy(dkw->dkw_parent, sc->sc_dv.dv_xname); 511 return (dkwedge_add(dkw)); 512 } 513 514 case DIOCDWEDGE: 515 { 516 struct dkwedge_info *dkw = (void *) addr; 517 518 if ((flag & FWRITE) == 0) 519 return (EBADF); 520 521 /* If the ioctl happens here, the parent is us. */ 522 strcpy(dkw->dkw_parent, sc->sc_dv.dv_xname); 523 return (dkwedge_del(dkw)); 524 } 525 526 case DIOCLWEDGES: 527 { 528 struct dkwedge_list *dkwl = (void *) addr; 529 530 return (dkwedge_list(&sc->sc_dk, dkwl, l)); 531 } 532 533 default: 534 error = ENOTTY; 535 break; 536 } 537 538 return (error); 539 } 540 541 static void 542 ldstrategy(struct buf *bp) 543 { 544 struct ld_softc *sc; 545 struct disklabel *lp; 546 daddr_t blkno; 547 int s, part; 548 549 sc = device_lookup(&ld_cd, DISKUNIT(bp->b_dev)); 550 part = DISKPART(bp->b_dev); 551 552 if ((sc->sc_flags & LDF_DETACH) != 0) { 553 bp->b_error = EIO; 554 goto bad; 555 } 556 557 lp = sc->sc_dk.dk_label; 558 559 /* 560 * The transfer must be a whole number of blocks and the offset must 561 * not be negative. 562 */ 563 if ((bp->b_bcount % lp->d_secsize) != 0 || bp->b_blkno < 0) { 564 bp->b_error = EINVAL; 565 goto bad; 566 } 567 568 /* If it's a null transfer, return immediately. */ 569 if (bp->b_bcount == 0) 570 goto done; 571 572 /* 573 * Do bounds checking and adjust the transfer. If error, process. 574 * If past the end of partition, just return. 575 */ 576 if (part != RAW_PART && 577 bounds_check_with_label(&sc->sc_dk, bp, 578 (sc->sc_flags & (LDF_WLABEL | LDF_LABELLING)) != 0) <= 0) { 579 goto done; 580 } 581 582 /* 583 * Convert the block number to absolute and put it in terms 584 * of the device's logical block size. 585 */ 586 if (lp->d_secsize == DEV_BSIZE) 587 blkno = bp->b_blkno; 588 else if (lp->d_secsize > DEV_BSIZE) 589 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 590 else 591 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 592 593 if (part != RAW_PART) 594 blkno += lp->d_partitions[part].p_offset; 595 596 bp->b_rawblkno = blkno; 597 598 s = splbio(); 599 ldstart(sc, bp); 600 splx(s); 601 return; 602 603 bad: 604 bp->b_flags |= B_ERROR; 605 done: 606 bp->b_resid = bp->b_bcount; 607 biodone(bp); 608 } 609 610 static void 611 ldstart(struct ld_softc *sc, struct buf *bp) 612 { 613 int error; 614 615 mutex_enter(&sc->sc_mutex); 616 617 if (bp != NULL) 618 BUFQ_PUT(sc->sc_bufq, bp); 619 620 while (sc->sc_queuecnt < sc->sc_maxqueuecnt) { 621 /* See if there is work to do. */ 622 if ((bp = BUFQ_PEEK(sc->sc_bufq)) == NULL) 623 break; 624 625 disk_busy(&sc->sc_dk); 626 sc->sc_queuecnt++; 627 628 if (__predict_true((error = (*sc->sc_start)(sc, bp)) == 0)) { 629 /* 630 * The back-end is running the job; remove it from 631 * the queue. 632 */ 633 (void) BUFQ_GET(sc->sc_bufq); 634 } else { 635 disk_unbusy(&sc->sc_dk, 0, (bp->b_flags & B_READ)); 636 sc->sc_queuecnt--; 637 if (error == EAGAIN) { 638 /* 639 * Temporary resource shortage in the 640 * back-end; just defer the job until 641 * later. 642 * 643 * XXX We might consider a watchdog timer 644 * XXX to make sure we are kicked into action. 645 */ 646 break; 647 } else { 648 (void) BUFQ_GET(sc->sc_bufq); 649 bp->b_error = error; 650 bp->b_flags |= B_ERROR; 651 bp->b_resid = bp->b_bcount; 652 mutex_exit(&sc->sc_mutex); 653 biodone(bp); 654 mutex_enter(&sc->sc_mutex); 655 } 656 } 657 } 658 659 mutex_exit(&sc->sc_mutex); 660 } 661 662 void 663 lddone(struct ld_softc *sc, struct buf *bp) 664 { 665 666 if ((bp->b_flags & B_ERROR) != 0) { 667 diskerr(bp, "ld", "error", LOG_PRINTF, 0, sc->sc_dk.dk_label); 668 printf("\n"); 669 } 670 671 disk_unbusy(&sc->sc_dk, bp->b_bcount - bp->b_resid, 672 (bp->b_flags & B_READ)); 673 #if NRND > 0 674 rnd_add_uint32(&sc->sc_rnd_source, bp->b_rawblkno); 675 #endif 676 biodone(bp); 677 678 mutex_enter(&sc->sc_mutex); 679 if (--sc->sc_queuecnt <= sc->sc_maxqueuecnt) { 680 if ((sc->sc_flags & LDF_DRAIN) != 0) { 681 sc->sc_flags &= ~LDF_DRAIN; 682 wakeup(&sc->sc_queuecnt); 683 } 684 mutex_exit(&sc->sc_mutex); 685 ldstart(sc, NULL); 686 } else 687 mutex_exit(&sc->sc_mutex); 688 } 689 690 static int 691 ldsize(dev_t dev) 692 { 693 struct ld_softc *sc; 694 int part, unit, omask, size; 695 696 unit = DISKUNIT(dev); 697 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 698 return (ENODEV); 699 if ((sc->sc_flags & LDF_ENABLED) == 0) 700 return (ENODEV); 701 part = DISKPART(dev); 702 703 omask = sc->sc_dk.dk_openmask & (1 << part); 704 705 if (omask == 0 && ldopen(dev, 0, S_IFBLK, NULL) != 0) 706 return (-1); 707 else if (sc->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 708 size = -1; 709 else 710 size = sc->sc_dk.dk_label->d_partitions[part].p_size * 711 (sc->sc_dk.dk_label->d_secsize / DEV_BSIZE); 712 if (omask == 0 && ldclose(dev, 0, S_IFBLK, NULL) != 0) 713 return (-1); 714 715 return (size); 716 } 717 718 /* 719 * Load the label information from the specified device. 720 */ 721 static void 722 ldgetdisklabel(struct ld_softc *sc) 723 { 724 const char *errstring; 725 726 ldgetdefaultlabel(sc, sc->sc_dk.dk_label); 727 728 /* Call the generic disklabel extraction routine. */ 729 errstring = readdisklabel(MAKEDISKDEV(0, device_unit(&sc->sc_dv), 730 RAW_PART), ldstrategy, sc->sc_dk.dk_label, sc->sc_dk.dk_cpulabel); 731 if (errstring != NULL) 732 printf("%s: %s\n", sc->sc_dv.dv_xname, errstring); 733 734 /* In-core label now valid. */ 735 sc->sc_flags |= LDF_VLABEL; 736 } 737 738 /* 739 * Construct a ficticious label. 740 */ 741 static void 742 ldgetdefaultlabel(struct ld_softc *sc, struct disklabel *lp) 743 { 744 745 memset(lp, 0, sizeof(struct disklabel)); 746 747 lp->d_secsize = sc->sc_secsize; 748 lp->d_ntracks = sc->sc_nheads; 749 lp->d_nsectors = sc->sc_nsectors; 750 lp->d_ncylinders = sc->sc_ncylinders; 751 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 752 lp->d_type = DTYPE_LD; 753 strlcpy(lp->d_typename, "unknown", sizeof(lp->d_typename)); 754 strlcpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 755 lp->d_secperunit = sc->sc_secperunit; 756 lp->d_rpm = 7200; 757 lp->d_interleave = 1; 758 lp->d_flags = 0; 759 760 lp->d_partitions[RAW_PART].p_offset = 0; 761 lp->d_partitions[RAW_PART].p_size = 762 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 763 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 764 lp->d_npartitions = RAW_PART + 1; 765 766 lp->d_magic = DISKMAGIC; 767 lp->d_magic2 = DISKMAGIC; 768 lp->d_checksum = dkcksum(lp); 769 } 770 771 /* 772 * Take a dump. 773 */ 774 static int 775 lddump(dev_t dev, daddr_t blkno, void *vav, size_t size) 776 { 777 char *va = vav; 778 struct ld_softc *sc; 779 struct disklabel *lp; 780 int unit, part, nsects, sectoff, towrt, nblk, maxblkcnt, rv; 781 static int dumping; 782 783 unit = DISKUNIT(dev); 784 if ((sc = device_lookup(&ld_cd, unit)) == NULL) 785 return (ENXIO); 786 if ((sc->sc_flags & LDF_ENABLED) == 0) 787 return (ENODEV); 788 if (sc->sc_dump == NULL) 789 return (ENXIO); 790 791 /* Check if recursive dump; if so, punt. */ 792 if (dumping) 793 return (EFAULT); 794 dumping = 1; 795 796 /* Convert to disk sectors. Request must be a multiple of size. */ 797 part = DISKPART(dev); 798 lp = sc->sc_dk.dk_label; 799 if ((size % lp->d_secsize) != 0) 800 return (EFAULT); 801 towrt = size / lp->d_secsize; 802 blkno = dbtob(blkno) / lp->d_secsize; /* blkno in DEV_BSIZE units */ 803 804 nsects = lp->d_partitions[part].p_size; 805 sectoff = lp->d_partitions[part].p_offset; 806 807 /* Check transfer bounds against partition size. */ 808 if ((blkno < 0) || ((blkno + towrt) > nsects)) 809 return (EINVAL); 810 811 /* Offset block number to start of partition. */ 812 blkno += sectoff; 813 814 /* Start dumping and return when done. */ 815 maxblkcnt = sc->sc_maxxfer / sc->sc_secsize - 1; 816 while (towrt > 0) { 817 nblk = min(maxblkcnt, towrt); 818 819 if ((rv = (*sc->sc_dump)(sc, va, blkno, nblk)) != 0) 820 return (rv); 821 822 towrt -= nblk; 823 blkno += nblk; 824 va += nblk * sc->sc_secsize; 825 } 826 827 dumping = 0; 828 return (0); 829 } 830 831 /* 832 * Adjust the size of a transfer. 833 */ 834 static void 835 ldminphys(struct buf *bp) 836 { 837 struct ld_softc *sc; 838 839 sc = device_lookup(&ld_cd, DISKUNIT(bp->b_dev)); 840 841 if (bp->b_bcount > sc->sc_maxxfer) 842 bp->b_bcount = sc->sc_maxxfer; 843 minphys(bp); 844 } 845 846 static void 847 ld_set_properties(struct ld_softc *ld) 848 { 849 prop_dictionary_t disk_info, odisk_info, geom; 850 851 disk_info = prop_dictionary_create(); 852 853 geom = prop_dictionary_create(); 854 855 prop_dictionary_set_uint64(geom, "sectors-per-unit", 856 ld->sc_secperunit); 857 858 prop_dictionary_set_uint32(geom, "sector-size", 859 ld->sc_secsize); 860 861 prop_dictionary_set_uint16(geom, "sectors-per-track", 862 ld->sc_nsectors); 863 864 prop_dictionary_set_uint16(geom, "tracks-per-cylinder", 865 ld->sc_nheads); 866 867 prop_dictionary_set_uint64(geom, "cylinders-per-unit", 868 ld->sc_ncylinders); 869 870 prop_dictionary_set(disk_info, "geometry", geom); 871 prop_object_release(geom); 872 873 prop_dictionary_set(device_properties(&ld->sc_dv), 874 "disk-info", disk_info); 875 876 /* 877 * Don't release disk_info here; we keep a reference to it. 878 * disk_detach() will release it when we go away. 879 */ 880 881 odisk_info = ld->sc_dk.dk_info; 882 ld->sc_dk.dk_info = disk_info; 883 if (odisk_info) 884 prop_object_release(odisk_info); 885 } 886 887 static void 888 ld_config_interrupts (struct device *d) 889 { 890 struct ld_softc *sc = (struct ld_softc *)d; 891 dkwedge_discover(&sc->sc_dk); 892 } 893
Indexes created Wed Sep 24 15:09:51 GMT 2025