1 /* 2 * Copyright (c) 2003,2004,2009 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * and Alex Hornung <ahornung@gmail.com> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * ---------------------------------------------------------------------------- 36 * "THE BEER-WARE LICENSE" (Revision 42): 37 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 38 * can do whatever you want with this stuff. If we meet some day, and you think 39 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 40 * ---------------------------------------------------------------------------- 41 * 42 * Copyright (c) 1982, 1986, 1988, 1993 43 * The Regents of the University of California. All rights reserved. 44 * (c) UNIX System Laboratories, Inc. 45 * All or some portions of this file are derived from material licensed 46 * to the University of California by American Telephone and Telegraph 47 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 48 * the permission of UNIX System Laboratories, Inc. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. All advertising materials mentioning features or use of this software 59 * must display the following acknowledgement: 60 * This product includes software developed by the University of 61 * California, Berkeley and its contributors. 62 * 4. Neither the name of the University nor the names of its contributors 63 * may be used to endorse or promote products derived from this software 64 * without specific prior written permission. 65 * 66 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 67 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 68 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 69 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 70 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 74 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 75 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 76 * SUCH DAMAGE. 77 * 78 * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94 79 * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $ 80 * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $ 81 */ 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/proc.h> 87 #include <sys/sysctl.h> 88 #include <sys/buf.h> 89 #include <sys/conf.h> 90 #include <sys/disklabel.h> 91 #include <sys/disklabel32.h> 92 #include <sys/disklabel64.h> 93 #include <sys/diskslice.h> 94 #include <sys/diskmbr.h> 95 #include <sys/disk.h> 96 #include <sys/kerneldump.h> 97 #include <sys/malloc.h> 98 #include <machine/md_var.h> 99 #include <sys/ctype.h> 100 #include <sys/syslog.h> 101 #include <sys/device.h> 102 #include <sys/msgport.h> 103 #include <sys/devfs.h> 104 #include <sys/thread.h> 105 #include <sys/dsched.h> 106 #include <sys/queue.h> 107 #include <sys/lock.h> 108 #include <sys/udev.h> 109 #include <sys/uuid.h> 110 111 #include <sys/buf2.h> 112 #include <sys/mplock2.h> 113 #include <sys/msgport2.h> 114 #include <sys/thread2.h> 115 116 static MALLOC_DEFINE(M_DISK, "disk", "disk data"); 117 static int disk_debug_enable = 0; 118 119 static void disk_msg_autofree_reply(lwkt_port_t, lwkt_msg_t); 120 static void disk_msg_core(void *); 121 static int disk_probe_slice(struct disk *dp, cdev_t dev, int slice, int reprobe); 122 static void disk_probe(struct disk *dp, int reprobe); 123 static void _setdiskinfo(struct disk *disk, struct disk_info *info); 124 static void bioqwritereorder(struct bio_queue_head *bioq); 125 static void disk_cleanserial(char *serno); 126 static int disk_debug(int, char *, ...) __printflike(2, 3); 127 static cdev_t _disk_create_named(const char *name, int unit, struct disk *dp, 128 struct dev_ops *raw_ops, int clone); 129 130 static d_open_t diskopen; 131 static d_close_t diskclose; 132 static d_ioctl_t diskioctl; 133 static d_strategy_t diskstrategy; 134 static d_psize_t diskpsize; 135 static d_dump_t diskdump; 136 137 static LIST_HEAD(, disk) disklist = LIST_HEAD_INITIALIZER(&disklist); 138 static struct lwkt_token disklist_token; 139 140 static struct dev_ops disk_ops = { 141 { "disk", 0, D_DISK | D_MPSAFE | D_TRACKCLOSE }, 142 .d_open = diskopen, 143 .d_close = diskclose, 144 .d_read = physread, 145 .d_write = physwrite, 146 .d_ioctl = diskioctl, 147 .d_strategy = diskstrategy, 148 .d_dump = diskdump, 149 .d_psize = diskpsize, 150 }; 151 152 static struct objcache *disk_msg_cache; 153 154 struct objcache_malloc_args disk_msg_malloc_args = { 155 sizeof(struct disk_msg), M_DISK }; 156 157 static struct lwkt_port disk_dispose_port; 158 static struct lwkt_port disk_msg_port; 159 160 static int 161 disk_debug(int level, char *fmt, ...) 162 { 163 __va_list ap; 164 165 __va_start(ap, fmt); 166 if (level <= disk_debug_enable) 167 kvprintf(fmt, ap); 168 __va_end(ap); 169 170 return 0; 171 } 172 173 static int 174 disk_probe_slice(struct disk *dp, cdev_t dev, int slice, int reprobe) 175 { 176 struct disk_info *info = &dp->d_info; 177 struct diskslice *sp = &dp->d_slice->dss_slices[slice]; 178 disklabel_ops_t ops; 179 struct partinfo part; 180 const char *msg; 181 char uuid_buf[128]; 182 cdev_t ndev; 183 int sno; 184 u_int i; 185 186 disk_debug(2, 187 "disk_probe_slice (begin): %s (%s)\n", 188 dev->si_name, dp->d_cdev->si_name); 189 190 sno = slice ? slice - 1 : 0; 191 192 ops = &disklabel32_ops; 193 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info); 194 if (msg && !strcmp(msg, "no disk label")) { 195 ops = &disklabel64_ops; 196 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info); 197 } 198 199 if (msg == NULL) { 200 if (slice != WHOLE_DISK_SLICE) 201 ops->op_adjust_label_reserved(dp->d_slice, slice, sp); 202 else 203 sp->ds_reserved = 0; 204 205 sp->ds_ops = ops; 206 for (i = 0; i < ops->op_getnumparts(sp->ds_label); i++) { 207 ops->op_loadpartinfo(sp->ds_label, i, &part); 208 if (part.fstype) { 209 if (reprobe && 210 (ndev = devfs_find_device_by_name("%s%c", 211 dev->si_name, 'a' + i)) 212 ) { 213 /* 214 * Device already exists and 215 * is still valid. 216 */ 217 ndev->si_flags |= SI_REPROBE_TEST; 218 219 /* 220 * Destroy old UUID alias 221 */ 222 destroy_dev_alias(ndev, "part-by-uuid/*"); 223 224 /* Create UUID alias */ 225 if (!kuuid_is_nil(&part.storage_uuid)) { 226 snprintf_uuid(uuid_buf, 227 sizeof(uuid_buf), 228 &part.storage_uuid); 229 make_dev_alias(ndev, 230 "part-by-uuid/%s", 231 uuid_buf); 232 udev_dict_set_cstr(ndev, "uuid", uuid_buf); 233 } 234 } else { 235 ndev = make_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 236 dkmakeminor(dkunit(dp->d_cdev), 237 slice, i), 238 UID_ROOT, GID_OPERATOR, 0640, 239 "%s%c", dev->si_name, 'a'+ i); 240 ndev->si_parent = dev; 241 ndev->si_disk = dp; 242 udev_dict_set_cstr(ndev, "subsystem", "disk"); 243 /* Inherit parent's disk type */ 244 if (dp->d_disktype) { 245 udev_dict_set_cstr(ndev, "disk-type", 246 __DECONST(char *, dp->d_disktype)); 247 } 248 249 /* Create serno alias */ 250 if (dp->d_info.d_serialno) { 251 make_dev_alias(ndev, 252 "serno/%s.s%d%c", 253 dp->d_info.d_serialno, 254 sno, 'a' + i); 255 } 256 257 /* Create UUID alias */ 258 if (!kuuid_is_nil(&part.storage_uuid)) { 259 snprintf_uuid(uuid_buf, 260 sizeof(uuid_buf), 261 &part.storage_uuid); 262 make_dev_alias(ndev, 263 "part-by-uuid/%s", 264 uuid_buf); 265 udev_dict_set_cstr(ndev, "uuid", uuid_buf); 266 } 267 ndev->si_flags |= SI_REPROBE_TEST; 268 } 269 } 270 } 271 } else if (info->d_dsflags & DSO_COMPATLABEL) { 272 msg = NULL; 273 if (sp->ds_size >= 0x100000000ULL) 274 ops = &disklabel64_ops; 275 else 276 ops = &disklabel32_ops; 277 sp->ds_label = ops->op_clone_label(info, sp); 278 } else { 279 if (sp->ds_type == DOSPTYP_386BSD || /* XXX */ 280 sp->ds_type == DOSPTYP_NETBSD || 281 sp->ds_type == DOSPTYP_OPENBSD) { 282 log(LOG_WARNING, "%s: cannot find label (%s)\n", 283 dev->si_name, msg); 284 } 285 286 if (sp->ds_label.opaque != NULL && sp->ds_ops != NULL) { 287 /* Clear out old label - it's not around anymore */ 288 disk_debug(2, 289 "disk_probe_slice: clear out old diskabel on %s\n", 290 dev->si_name); 291 292 sp->ds_ops->op_freedisklabel(&sp->ds_label); 293 sp->ds_ops = NULL; 294 } 295 } 296 297 if (msg == NULL) { 298 sp->ds_wlabel = FALSE; 299 } 300 301 return (msg ? EINVAL : 0); 302 } 303 304 /* 305 * This routine is only called for newly minted drives or to reprobe 306 * a drive with no open slices. disk_probe_slice() is called directly 307 * when reprobing partition changes within slices. 308 */ 309 static void 310 disk_probe(struct disk *dp, int reprobe) 311 { 312 struct disk_info *info = &dp->d_info; 313 cdev_t dev = dp->d_cdev; 314 cdev_t ndev; 315 int error, i, sno; 316 struct diskslices *osp; 317 struct diskslice *sp; 318 char uuid_buf[128]; 319 320 KKASSERT (info->d_media_blksize != 0); 321 322 osp = dp->d_slice; 323 dp->d_slice = dsmakeslicestruct(BASE_SLICE, info); 324 disk_debug(1, "disk_probe (begin): %s\n", dp->d_cdev->si_name); 325 326 error = mbrinit(dev, info, &(dp->d_slice)); 327 if (error) { 328 dsgone(&osp); 329 return; 330 } 331 332 for (i = 0; i < dp->d_slice->dss_nslices; i++) { 333 /* 334 * Ignore the whole-disk slice, it has already been created. 335 */ 336 if (i == WHOLE_DISK_SLICE) 337 continue; 338 339 #if 1 340 /* 341 * Ignore the compatibility slice s0 if it's a device mapper 342 * volume. 343 */ 344 if ((i == COMPATIBILITY_SLICE) && 345 (info->d_dsflags & DSO_DEVICEMAPPER)) 346 continue; 347 #endif 348 349 sp = &dp->d_slice->dss_slices[i]; 350 351 /* 352 * Handle s0. s0 is a compatibility slice if there are no 353 * other slices and it has not otherwise been set up, else 354 * we ignore it. 355 */ 356 if (i == COMPATIBILITY_SLICE) { 357 sno = 0; 358 if (sp->ds_type == 0 && 359 dp->d_slice->dss_nslices == BASE_SLICE) { 360 sp->ds_size = info->d_media_blocks; 361 sp->ds_reserved = 0; 362 } 363 } else { 364 sno = i - 1; 365 sp->ds_reserved = 0; 366 } 367 368 /* 369 * Ignore 0-length slices 370 */ 371 if (sp->ds_size == 0) 372 continue; 373 374 if (reprobe && 375 (ndev = devfs_find_device_by_name("%ss%d", 376 dev->si_name, sno))) { 377 /* 378 * Device already exists and is still valid 379 */ 380 ndev->si_flags |= SI_REPROBE_TEST; 381 382 /* 383 * Destroy old UUID alias 384 */ 385 destroy_dev_alias(ndev, "slice-by-uuid/*"); 386 387 /* Create UUID alias */ 388 if (!kuuid_is_nil(&sp->ds_stor_uuid)) { 389 snprintf_uuid(uuid_buf, sizeof(uuid_buf), 390 &sp->ds_stor_uuid); 391 make_dev_alias(ndev, "slice-by-uuid/%s", 392 uuid_buf); 393 } 394 } else { 395 /* 396 * Else create new device 397 */ 398 ndev = make_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 399 dkmakewholeslice(dkunit(dev), i), 400 UID_ROOT, GID_OPERATOR, 0640, 401 (info->d_dsflags & DSO_DEVICEMAPPER)? 402 "%s.s%d" : "%ss%d", dev->si_name, sno); 403 ndev->si_parent = dev; 404 udev_dict_set_cstr(ndev, "subsystem", "disk"); 405 /* Inherit parent's disk type */ 406 if (dp->d_disktype) { 407 udev_dict_set_cstr(ndev, "disk-type", 408 __DECONST(char *, dp->d_disktype)); 409 } 410 411 /* Create serno alias */ 412 if (dp->d_info.d_serialno) { 413 make_dev_alias(ndev, "serno/%s.s%d", 414 dp->d_info.d_serialno, sno); 415 } 416 417 /* Create UUID alias */ 418 if (!kuuid_is_nil(&sp->ds_stor_uuid)) { 419 snprintf_uuid(uuid_buf, sizeof(uuid_buf), 420 &sp->ds_stor_uuid); 421 make_dev_alias(ndev, "slice-by-uuid/%s", 422 uuid_buf); 423 } 424 425 ndev->si_disk = dp; 426 ndev->si_flags |= SI_REPROBE_TEST; 427 } 428 sp->ds_dev = ndev; 429 430 /* 431 * Probe appropriate slices for a disklabel 432 * 433 * XXX slice type 1 used by our gpt probe code. 434 * XXX slice type 0 used by mbr compat slice. 435 */ 436 if (sp->ds_type == DOSPTYP_386BSD || 437 sp->ds_type == DOSPTYP_NETBSD || 438 sp->ds_type == DOSPTYP_OPENBSD || 439 sp->ds_type == 0 || 440 sp->ds_type == 1) { 441 if (dp->d_slice->dss_first_bsd_slice == 0) 442 dp->d_slice->dss_first_bsd_slice = i; 443 disk_probe_slice(dp, ndev, i, reprobe); 444 } 445 } 446 dsgone(&osp); 447 disk_debug(1, "disk_probe (end): %s\n", dp->d_cdev->si_name); 448 } 449 450 451 static void 452 disk_msg_core(void *arg) 453 { 454 struct disk *dp; 455 struct diskslice *sp; 456 disk_msg_t msg; 457 int run; 458 459 lwkt_gettoken(&disklist_token); 460 lwkt_initport_thread(&disk_msg_port, curthread); 461 wakeup(curthread); /* synchronous startup */ 462 lwkt_reltoken(&disklist_token); 463 464 get_mplock(); /* not mpsafe yet? */ 465 run = 1; 466 467 while (run) { 468 msg = (disk_msg_t)lwkt_waitport(&disk_msg_port, 0); 469 470 switch (msg->hdr.u.ms_result) { 471 case DISK_DISK_PROBE: 472 dp = (struct disk *)msg->load; 473 disk_debug(1, 474 "DISK_DISK_PROBE: %s\n", 475 dp->d_cdev->si_name); 476 disk_probe(dp, 0); 477 break; 478 case DISK_DISK_DESTROY: 479 dp = (struct disk *)msg->load; 480 disk_debug(1, 481 "DISK_DISK_DESTROY: %s\n", 482 dp->d_cdev->si_name); 483 devfs_destroy_related(dp->d_cdev); 484 destroy_dev(dp->d_cdev); 485 destroy_only_dev(dp->d_rawdev); 486 lwkt_gettoken(&disklist_token); 487 LIST_REMOVE(dp, d_list); 488 lwkt_reltoken(&disklist_token); 489 if (dp->d_info.d_serialno) { 490 kfree(dp->d_info.d_serialno, M_TEMP); 491 dp->d_info.d_serialno = NULL; 492 } 493 break; 494 case DISK_UNPROBE: 495 dp = (struct disk *)msg->load; 496 disk_debug(1, 497 "DISK_DISK_UNPROBE: %s\n", 498 dp->d_cdev->si_name); 499 devfs_destroy_related(dp->d_cdev); 500 break; 501 case DISK_SLICE_REPROBE: 502 dp = (struct disk *)msg->load; 503 sp = (struct diskslice *)msg->load2; 504 devfs_clr_related_flag(sp->ds_dev, 505 SI_REPROBE_TEST); 506 disk_debug(1, 507 "DISK_SLICE_REPROBE: %s\n", 508 sp->ds_dev->si_name); 509 disk_probe_slice(dp, sp->ds_dev, 510 dkslice(sp->ds_dev), 1); 511 devfs_destroy_related_without_flag( 512 sp->ds_dev, SI_REPROBE_TEST); 513 break; 514 case DISK_DISK_REPROBE: 515 dp = (struct disk *)msg->load; 516 devfs_clr_related_flag(dp->d_cdev, SI_REPROBE_TEST); 517 disk_debug(1, 518 "DISK_DISK_REPROBE: %s\n", 519 dp->d_cdev->si_name); 520 disk_probe(dp, 1); 521 devfs_destroy_related_without_flag( 522 dp->d_cdev, SI_REPROBE_TEST); 523 break; 524 case DISK_SYNC: 525 disk_debug(1, "DISK_SYNC\n"); 526 break; 527 default: 528 devfs_debug(DEVFS_DEBUG_WARNING, 529 "disk_msg_core: unknown message " 530 "received at core\n"); 531 break; 532 } 533 lwkt_replymsg(&msg->hdr, 0); 534 } 535 lwkt_exit(); 536 } 537 538 539 /* 540 * Acts as a message drain. Any message that is replied to here gets 541 * destroyed and the memory freed. 542 */ 543 static void 544 disk_msg_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 545 { 546 objcache_put(disk_msg_cache, msg); 547 } 548 549 550 void 551 disk_msg_send(uint32_t cmd, void *load, void *load2) 552 { 553 disk_msg_t disk_msg; 554 lwkt_port_t port = &disk_msg_port; 555 556 disk_msg = objcache_get(disk_msg_cache, M_WAITOK); 557 558 lwkt_initmsg(&disk_msg->hdr, &disk_dispose_port, 0); 559 560 disk_msg->hdr.u.ms_result = cmd; 561 disk_msg->load = load; 562 disk_msg->load2 = load2; 563 KKASSERT(port); 564 lwkt_sendmsg(port, &disk_msg->hdr); 565 } 566 567 void 568 disk_msg_send_sync(uint32_t cmd, void *load, void *load2) 569 { 570 struct lwkt_port rep_port; 571 disk_msg_t disk_msg; 572 lwkt_port_t port; 573 574 disk_msg = objcache_get(disk_msg_cache, M_WAITOK); 575 port = &disk_msg_port; 576 577 /* XXX could probably use curthread's built-in msgport */ 578 lwkt_initport_thread(&rep_port, curthread); 579 lwkt_initmsg(&disk_msg->hdr, &rep_port, 0); 580 581 disk_msg->hdr.u.ms_result = cmd; 582 disk_msg->load = load; 583 disk_msg->load2 = load2; 584 585 lwkt_sendmsg(port, &disk_msg->hdr); 586 lwkt_waitmsg(&disk_msg->hdr, 0); 587 objcache_put(disk_msg_cache, disk_msg); 588 } 589 590 /* 591 * Create a raw device for the dev_ops template (which is returned). Also 592 * create a slice and unit managed disk and overload the user visible 593 * device space with it. 594 * 595 * NOTE: The returned raw device is NOT a slice and unit managed device. 596 * It is an actual raw device representing the raw disk as specified by 597 * the passed dev_ops. The disk layer not only returns such a raw device, 598 * it also uses it internally when passing (modified) commands through. 599 */ 600 cdev_t 601 disk_create(int unit, struct disk *dp, struct dev_ops *raw_ops) 602 { 603 return _disk_create_named(NULL, unit, dp, raw_ops, 0); 604 } 605 606 cdev_t 607 disk_create_clone(int unit, struct disk *dp, struct dev_ops *raw_ops) 608 { 609 return _disk_create_named(NULL, unit, dp, raw_ops, 1); 610 } 611 612 cdev_t 613 disk_create_named(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops) 614 { 615 return _disk_create_named(name, unit, dp, raw_ops, 0); 616 } 617 618 cdev_t 619 disk_create_named_clone(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops) 620 { 621 return _disk_create_named(name, unit, dp, raw_ops, 1); 622 } 623 624 static cdev_t 625 _disk_create_named(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops, int clone) 626 { 627 cdev_t rawdev; 628 629 disk_debug(1, "disk_create (begin): %s%d\n", name, unit); 630 631 if (name) { 632 rawdev = make_only_dev(raw_ops, dkmakewholedisk(unit), 633 UID_ROOT, GID_OPERATOR, 0640, "%s", name); 634 } else { 635 rawdev = make_only_dev(raw_ops, dkmakewholedisk(unit), 636 UID_ROOT, GID_OPERATOR, 0640, 637 "%s%d", raw_ops->head.name, unit); 638 } 639 640 bzero(dp, sizeof(*dp)); 641 642 dp->d_rawdev = rawdev; 643 dp->d_raw_ops = raw_ops; 644 dp->d_dev_ops = &disk_ops; 645 646 if (name) { 647 if (clone) { 648 dp->d_cdev = make_only_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 649 dkmakewholedisk(unit), UID_ROOT, GID_OPERATOR, 0640, 650 "%s", name); 651 } else { 652 dp->d_cdev = make_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 653 dkmakewholedisk(unit), UID_ROOT, GID_OPERATOR, 0640, 654 "%s", name); 655 } 656 } else { 657 if (clone) { 658 dp->d_cdev = make_only_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 659 dkmakewholedisk(unit), 660 UID_ROOT, GID_OPERATOR, 0640, 661 "%s%d", raw_ops->head.name, unit); 662 } else { 663 dp->d_cdev = make_dev_covering(&disk_ops, dp->d_rawdev->si_ops, 664 dkmakewholedisk(unit), 665 UID_ROOT, GID_OPERATOR, 0640, 666 "%s%d", raw_ops->head.name, unit); 667 } 668 } 669 670 udev_dict_set_cstr(dp->d_cdev, "subsystem", "disk"); 671 dp->d_cdev->si_disk = dp; 672 673 if (name) 674 dsched_disk_create_callback(dp, name, unit); 675 else 676 dsched_disk_create_callback(dp, raw_ops->head.name, unit); 677 678 lwkt_gettoken(&disklist_token); 679 LIST_INSERT_HEAD(&disklist, dp, d_list); 680 lwkt_reltoken(&disklist_token); 681 682 disk_debug(1, "disk_create (end): %s%d\n", 683 (name != NULL)?(name):(raw_ops->head.name), unit); 684 685 return (dp->d_rawdev); 686 } 687 688 int 689 disk_setdisktype(struct disk *disk, const char *type) 690 { 691 KKASSERT(disk != NULL); 692 693 disk->d_disktype = type; 694 return udev_dict_set_cstr(disk->d_cdev, "disk-type", __DECONST(char *, type)); 695 } 696 697 int 698 disk_getopencount(struct disk *disk) 699 { 700 return disk->d_opencount; 701 } 702 703 static void 704 _setdiskinfo(struct disk *disk, struct disk_info *info) 705 { 706 char *oldserialno; 707 708 oldserialno = disk->d_info.d_serialno; 709 bcopy(info, &disk->d_info, sizeof(disk->d_info)); 710 info = &disk->d_info; 711 712 disk_debug(1, 713 "_setdiskinfo: %s\n", 714 disk->d_cdev->si_name); 715 716 /* 717 * The serial number is duplicated so the caller can throw 718 * their copy away. 719 */ 720 if (info->d_serialno && info->d_serialno[0] && 721 (info->d_serialno[0] != ' ' || strlen(info->d_serialno) > 1)) { 722 info->d_serialno = kstrdup(info->d_serialno, M_TEMP); 723 disk_cleanserial(info->d_serialno); 724 if (disk->d_cdev) { 725 make_dev_alias(disk->d_cdev, "serno/%s", 726 info->d_serialno); 727 } 728 } else { 729 info->d_serialno = NULL; 730 } 731 if (oldserialno) 732 kfree(oldserialno, M_TEMP); 733 734 dsched_disk_update_callback(disk, info); 735 736 /* 737 * The caller may set d_media_size or d_media_blocks and we 738 * calculate the other. 739 */ 740 KKASSERT(info->d_media_size == 0 || info->d_media_blocks == 0); 741 if (info->d_media_size == 0 && info->d_media_blocks) { 742 info->d_media_size = (u_int64_t)info->d_media_blocks * 743 info->d_media_blksize; 744 } else if (info->d_media_size && info->d_media_blocks == 0 && 745 info->d_media_blksize) { 746 info->d_media_blocks = info->d_media_size / 747 info->d_media_blksize; 748 } 749 750 /* 751 * The si_* fields for rawdev are not set until after the 752 * disk_create() call, so someone using the cooked version 753 * of the raw device (i.e. da0s0) will not get the right 754 * si_iosize_max unless we fix it up here. 755 */ 756 if (disk->d_cdev && disk->d_rawdev && 757 disk->d_cdev->si_iosize_max == 0) { 758 disk->d_cdev->si_iosize_max = disk->d_rawdev->si_iosize_max; 759 disk->d_cdev->si_bsize_phys = disk->d_rawdev->si_bsize_phys; 760 disk->d_cdev->si_bsize_best = disk->d_rawdev->si_bsize_best; 761 } 762 763 /* Add the serial number to the udev_dictionary */ 764 if (info->d_serialno) 765 udev_dict_set_cstr(disk->d_cdev, "serno", info->d_serialno); 766 } 767 768 /* 769 * Disk drivers must call this routine when media parameters are available 770 * or have changed. 771 */ 772 void 773 disk_setdiskinfo(struct disk *disk, struct disk_info *info) 774 { 775 _setdiskinfo(disk, info); 776 disk_msg_send(DISK_DISK_PROBE, disk, NULL); 777 disk_debug(1, 778 "disk_setdiskinfo: sent probe for %s\n", 779 disk->d_cdev->si_name); 780 } 781 782 void 783 disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info) 784 { 785 _setdiskinfo(disk, info); 786 disk_msg_send_sync(DISK_DISK_PROBE, disk, NULL); 787 disk_debug(1, 788 "disk_setdiskinfo_sync: sent probe for %s\n", 789 disk->d_cdev->si_name); 790 } 791 792 /* 793 * This routine is called when an adapter detaches. The higher level 794 * managed disk device is destroyed while the lower level raw device is 795 * released. 796 */ 797 void 798 disk_destroy(struct disk *disk) 799 { 800 dsched_disk_destroy_callback(disk); 801 disk_msg_send_sync(DISK_DISK_DESTROY, disk, NULL); 802 return; 803 } 804 805 int 806 disk_dumpcheck(cdev_t dev, u_int64_t *size, u_int64_t *blkno, u_int32_t *secsize) 807 { 808 struct partinfo pinfo; 809 int error; 810 811 bzero(&pinfo, sizeof(pinfo)); 812 error = dev_dioctl(dev, DIOCGPART, (void *)&pinfo, 0, 813 proc0.p_ucred, NULL); 814 if (error) 815 return (error); 816 817 if (pinfo.media_blksize == 0) 818 return (ENXIO); 819 820 if (blkno) /* XXX: make sure this reserved stuff is right */ 821 *blkno = pinfo.reserved_blocks + 822 pinfo.media_offset / pinfo.media_blksize; 823 if (secsize) 824 *secsize = pinfo.media_blksize; 825 if (size) 826 *size = (pinfo.media_blocks - pinfo.reserved_blocks); 827 828 return (0); 829 } 830 831 int 832 disk_dumpconf(cdev_t dev, u_int onoff) 833 { 834 struct dumperinfo di; 835 u_int64_t size, blkno; 836 u_int32_t secsize; 837 int error; 838 839 if (!onoff) 840 return set_dumper(NULL); 841 842 error = disk_dumpcheck(dev, &size, &blkno, &secsize); 843 844 if (error) 845 return ENXIO; 846 847 bzero(&di, sizeof(struct dumperinfo)); 848 di.dumper = diskdump; 849 di.priv = dev; 850 di.blocksize = secsize; 851 di.mediaoffset = blkno * DEV_BSIZE; 852 di.mediasize = size * DEV_BSIZE; 853 854 return set_dumper(&di); 855 } 856 857 void 858 disk_unprobe(struct disk *disk) 859 { 860 if (disk == NULL) 861 return; 862 863 disk_msg_send_sync(DISK_UNPROBE, disk, NULL); 864 } 865 866 void 867 disk_invalidate (struct disk *disk) 868 { 869 dsgone(&disk->d_slice); 870 } 871 872 struct disk * 873 disk_enumerate(struct disk *disk) 874 { 875 struct disk *dp; 876 877 lwkt_gettoken(&disklist_token); 878 if (!disk) 879 dp = (LIST_FIRST(&disklist)); 880 else 881 dp = (LIST_NEXT(disk, d_list)); 882 lwkt_reltoken(&disklist_token); 883 884 return dp; 885 } 886 887 static 888 int 889 sysctl_disks(SYSCTL_HANDLER_ARGS) 890 { 891 struct disk *disk; 892 int error, first; 893 894 disk = NULL; 895 first = 1; 896 897 while ((disk = disk_enumerate(disk))) { 898 if (!first) { 899 error = SYSCTL_OUT(req, " ", 1); 900 if (error) 901 return error; 902 } else { 903 first = 0; 904 } 905 error = SYSCTL_OUT(req, disk->d_rawdev->si_name, 906 strlen(disk->d_rawdev->si_name)); 907 if (error) 908 return error; 909 } 910 error = SYSCTL_OUT(req, "", 1); 911 return error; 912 } 913 914 SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD, NULL, 0, 915 sysctl_disks, "A", "names of available disks"); 916 917 /* 918 * Open a disk device or partition. 919 */ 920 static 921 int 922 diskopen(struct dev_open_args *ap) 923 { 924 cdev_t dev = ap->a_head.a_dev; 925 struct disk *dp; 926 int error; 927 928 /* 929 * dp can't be NULL here XXX. 930 * 931 * d_slice will be NULL if setdiskinfo() has not been called yet. 932 * setdiskinfo() is typically called whether the disk is present 933 * or not (e.g. CD), but the base disk device is created first 934 * and there may be a race. 935 */ 936 dp = dev->si_disk; 937 if (dp == NULL || dp->d_slice == NULL) 938 return (ENXIO); 939 error = 0; 940 941 /* 942 * Deal with open races 943 */ 944 get_mplock(); 945 while (dp->d_flags & DISKFLAG_LOCK) { 946 dp->d_flags |= DISKFLAG_WANTED; 947 error = tsleep(dp, PCATCH, "diskopen", hz); 948 if (error) { 949 rel_mplock(); 950 return (error); 951 } 952 } 953 dp->d_flags |= DISKFLAG_LOCK; 954 955 /* 956 * Open the underlying raw device. 957 */ 958 if (!dsisopen(dp->d_slice)) { 959 #if 0 960 if (!pdev->si_iosize_max) 961 pdev->si_iosize_max = dev->si_iosize_max; 962 #endif 963 error = dev_dopen(dp->d_rawdev, ap->a_oflags, 964 ap->a_devtype, ap->a_cred); 965 } 966 967 if (error) 968 goto out; 969 error = dsopen(dev, ap->a_devtype, dp->d_info.d_dsflags, 970 &dp->d_slice, &dp->d_info); 971 if (!dsisopen(dp->d_slice)) { 972 dev_dclose(dp->d_rawdev, ap->a_oflags, ap->a_devtype); 973 } 974 out: 975 dp->d_flags &= ~DISKFLAG_LOCK; 976 if (dp->d_flags & DISKFLAG_WANTED) { 977 dp->d_flags &= ~DISKFLAG_WANTED; 978 wakeup(dp); 979 } 980 rel_mplock(); 981 982 KKASSERT(dp->d_opencount >= 0); 983 /* If the open was successful, bump open count */ 984 if (error == 0) 985 atomic_add_int(&dp->d_opencount, 1); 986 987 return(error); 988 } 989 990 /* 991 * Close a disk device or partition 992 */ 993 static 994 int 995 diskclose(struct dev_close_args *ap) 996 { 997 cdev_t dev = ap->a_head.a_dev; 998 struct disk *dp; 999 int error; 1000 int lcount; 1001 1002 error = 0; 1003 dp = dev->si_disk; 1004 1005 /* 1006 * The cdev_t represents the disk/slice/part. The shared 1007 * dp structure governs all cdevs associated with the disk. 1008 * 1009 * As a safety only close the underlying raw device on the last 1010 * close the disk device if our tracking of the slices/partitions 1011 * also indicates nothing is open. 1012 */ 1013 KKASSERT(dp->d_opencount >= 1); 1014 lcount = atomic_fetchadd_int(&dp->d_opencount, -1); 1015 1016 get_mplock(); 1017 dsclose(dev, ap->a_devtype, dp->d_slice); 1018 if (lcount <= 1 && !dsisopen(dp->d_slice)) { 1019 error = dev_dclose(dp->d_rawdev, ap->a_fflag, ap->a_devtype); 1020 } 1021 rel_mplock(); 1022 return (error); 1023 } 1024 1025 /* 1026 * First execute the ioctl on the disk device, and if it isn't supported 1027 * try running it on the backing device. 1028 */ 1029 static 1030 int 1031 diskioctl(struct dev_ioctl_args *ap) 1032 { 1033 cdev_t dev = ap->a_head.a_dev; 1034 struct disk *dp; 1035 int error; 1036 u_int u; 1037 1038 dp = dev->si_disk; 1039 if (dp == NULL) 1040 return (ENXIO); 1041 1042 devfs_debug(DEVFS_DEBUG_DEBUG, 1043 "diskioctl: cmd is: %lx (name: %s)\n", 1044 ap->a_cmd, dev->si_name); 1045 devfs_debug(DEVFS_DEBUG_DEBUG, 1046 "diskioctl: &dp->d_slice is: %p, %p\n", 1047 &dp->d_slice, dp->d_slice); 1048 1049 if (ap->a_cmd == DIOCGKERNELDUMP) { 1050 u = *(u_int *)ap->a_data; 1051 return disk_dumpconf(dev, u); 1052 } 1053 1054 if (&dp->d_slice == NULL || dp->d_slice == NULL || 1055 ((dp->d_info.d_dsflags & DSO_DEVICEMAPPER) && 1056 dkslice(dev) == WHOLE_DISK_SLICE)) { 1057 error = ENOIOCTL; 1058 } else { 1059 get_mplock(); 1060 error = dsioctl(dev, ap->a_cmd, ap->a_data, ap->a_fflag, 1061 &dp->d_slice, &dp->d_info); 1062 rel_mplock(); 1063 } 1064 1065 if (error == ENOIOCTL) { 1066 error = dev_dioctl(dp->d_rawdev, ap->a_cmd, ap->a_data, 1067 ap->a_fflag, ap->a_cred, NULL); 1068 } 1069 return (error); 1070 } 1071 1072 /* 1073 * Execute strategy routine 1074 */ 1075 static 1076 int 1077 diskstrategy(struct dev_strategy_args *ap) 1078 { 1079 cdev_t dev = ap->a_head.a_dev; 1080 struct bio *bio = ap->a_bio; 1081 struct bio *nbio; 1082 struct disk *dp; 1083 1084 dp = dev->si_disk; 1085 1086 if (dp == NULL) { 1087 bio->bio_buf->b_error = ENXIO; 1088 bio->bio_buf->b_flags |= B_ERROR; 1089 biodone(bio); 1090 return(0); 1091 } 1092 KKASSERT(dev->si_disk == dp); 1093 1094 /* 1095 * The dscheck() function will also transform the slice relative 1096 * block number i.e. bio->bio_offset into a block number that can be 1097 * passed directly to the underlying raw device. If dscheck() 1098 * returns NULL it will have handled the bio for us (e.g. EOF 1099 * or error due to being beyond the device size). 1100 */ 1101 if ((nbio = dscheck(dev, bio, dp->d_slice)) != NULL) { 1102 dsched_queue(dp, nbio); 1103 } else { 1104 biodone(bio); 1105 } 1106 return(0); 1107 } 1108 1109 /* 1110 * Return the partition size in ?blocks? 1111 */ 1112 static 1113 int 1114 diskpsize(struct dev_psize_args *ap) 1115 { 1116 cdev_t dev = ap->a_head.a_dev; 1117 struct disk *dp; 1118 1119 dp = dev->si_disk; 1120 if (dp == NULL) 1121 return(ENODEV); 1122 1123 ap->a_result = dssize(dev, &dp->d_slice); 1124 1125 if ((ap->a_result == -1) && 1126 (dp->d_info.d_dsflags & DSO_RAWPSIZE)) { 1127 ap->a_head.a_dev = dp->d_rawdev; 1128 return dev_doperate(&ap->a_head); 1129 } 1130 return(0); 1131 } 1132 1133 int 1134 diskdump(struct dev_dump_args *ap) 1135 { 1136 cdev_t dev = ap->a_head.a_dev; 1137 struct disk *dp = dev->si_disk; 1138 u_int64_t size, offset; 1139 int error; 1140 1141 error = disk_dumpcheck(dev, &size, &ap->a_blkno, &ap->a_secsize); 1142 /* XXX: this should probably go in disk_dumpcheck somehow */ 1143 if (ap->a_length != 0) { 1144 size *= DEV_BSIZE; 1145 offset = ap->a_blkno * DEV_BSIZE; 1146 if ((ap->a_offset < offset) || 1147 (ap->a_offset + ap->a_length - offset > size)) { 1148 kprintf("Attempt to write outside dump device boundaries.\n"); 1149 error = ENOSPC; 1150 } 1151 } 1152 1153 if (error == 0) { 1154 ap->a_head.a_dev = dp->d_rawdev; 1155 error = dev_doperate(&ap->a_head); 1156 } 1157 1158 return(error); 1159 } 1160 1161 1162 SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD, 1163 0, sizeof(struct diskslices), "sizeof(struct diskslices)"); 1164 1165 SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD, 1166 0, sizeof(struct disk), "sizeof(struct disk)"); 1167 1168 /* 1169 * Reorder interval for burst write allowance and minor write 1170 * allowance. 1171 * 1172 * We always want to trickle some writes in to make use of the 1173 * disk's zone cache. Bursting occurs on a longer interval and only 1174 * runningbufspace is well over the hirunningspace limit. 1175 */ 1176 int bioq_reorder_burst_interval = 60; /* should be multiple of minor */ 1177 SYSCTL_INT(_kern, OID_AUTO, bioq_reorder_burst_interval, 1178 CTLFLAG_RW, &bioq_reorder_burst_interval, 0, ""); 1179 int bioq_reorder_minor_interval = 5; 1180 SYSCTL_INT(_kern, OID_AUTO, bioq_reorder_minor_interval, 1181 CTLFLAG_RW, &bioq_reorder_minor_interval, 0, ""); 1182 1183 int bioq_reorder_burst_bytes = 3000000; 1184 SYSCTL_INT(_kern, OID_AUTO, bioq_reorder_burst_bytes, 1185 CTLFLAG_RW, &bioq_reorder_burst_bytes, 0, ""); 1186 int bioq_reorder_minor_bytes = 262144; 1187 SYSCTL_INT(_kern, OID_AUTO, bioq_reorder_minor_bytes, 1188 CTLFLAG_RW, &bioq_reorder_minor_bytes, 0, ""); 1189 1190 1191 /* 1192 * Order I/Os. Generally speaking this code is designed to make better 1193 * use of drive zone caches. A drive zone cache can typically track linear 1194 * reads or writes for around 16 zones simultaniously. 1195 * 1196 * Read prioritization issues: It is possible for hundreds of megabytes worth 1197 * of writes to be queued asynchronously. This creates a huge bottleneck 1198 * for reads which reduce read bandwidth to a trickle. 1199 * 1200 * To solve this problem we generally reorder reads before writes. 1201 * 1202 * However, a large number of random reads can also starve writes and 1203 * make poor use of the drive zone cache so we allow writes to trickle 1204 * in every N reads. 1205 */ 1206 void 1207 bioqdisksort(struct bio_queue_head *bioq, struct bio *bio) 1208 { 1209 /* 1210 * The BIO wants to be ordered. Adding to the tail also 1211 * causes transition to be set to NULL, forcing the ordering 1212 * of all prior I/O's. 1213 */ 1214 if (bio->bio_buf->b_flags & B_ORDERED) { 1215 bioq_insert_tail(bioq, bio); 1216 return; 1217 } 1218 1219 switch(bio->bio_buf->b_cmd) { 1220 case BUF_CMD_READ: 1221 if (bioq->transition) { 1222 /* 1223 * Insert before the first write. Bleedover writes 1224 * based on reorder intervals to prevent starvation. 1225 */ 1226 TAILQ_INSERT_BEFORE(bioq->transition, bio, bio_act); 1227 ++bioq->reorder; 1228 if (bioq->reorder % bioq_reorder_minor_interval == 0) { 1229 bioqwritereorder(bioq); 1230 if (bioq->reorder >= 1231 bioq_reorder_burst_interval) { 1232 bioq->reorder = 0; 1233 } 1234 } 1235 } else { 1236 /* 1237 * No writes queued (or ordering was forced), 1238 * insert at tail. 1239 */ 1240 TAILQ_INSERT_TAIL(&bioq->queue, bio, bio_act); 1241 } 1242 break; 1243 case BUF_CMD_WRITE: 1244 /* 1245 * Writes are always appended. If no writes were previously 1246 * queued or an ordered tail insertion occured the transition 1247 * field will be NULL. 1248 */ 1249 TAILQ_INSERT_TAIL(&bioq->queue, bio, bio_act); 1250 if (bioq->transition == NULL) 1251 bioq->transition = bio; 1252 break; 1253 default: 1254 /* 1255 * All other request types are forced to be ordered. 1256 */ 1257 bioq_insert_tail(bioq, bio); 1258 break; 1259 } 1260 } 1261 1262 /* 1263 * Move the read-write transition point to prevent reads from 1264 * completely starving our writes. This brings a number of writes into 1265 * the fold every N reads. 1266 * 1267 * We bring a few linear writes into the fold on a minor interval 1268 * and we bring a non-linear burst of writes into the fold on a major 1269 * interval. Bursting only occurs if runningbufspace is really high 1270 * (typically from syncs, fsyncs, or HAMMER flushes). 1271 */ 1272 static 1273 void 1274 bioqwritereorder(struct bio_queue_head *bioq) 1275 { 1276 struct bio *bio; 1277 off_t next_offset; 1278 size_t left; 1279 size_t n; 1280 int check_off; 1281 1282 if (bioq->reorder < bioq_reorder_burst_interval || 1283 !buf_runningbufspace_severe()) { 1284 left = (size_t)bioq_reorder_minor_bytes; 1285 check_off = 1; 1286 } else { 1287 left = (size_t)bioq_reorder_burst_bytes; 1288 check_off = 0; 1289 } 1290 1291 next_offset = bioq->transition->bio_offset; 1292 while ((bio = bioq->transition) != NULL && 1293 (check_off == 0 || next_offset == bio->bio_offset) 1294 ) { 1295 n = bio->bio_buf->b_bcount; 1296 next_offset = bio->bio_offset + n; 1297 bioq->transition = TAILQ_NEXT(bio, bio_act); 1298 if (left < n) 1299 break; 1300 left -= n; 1301 } 1302 } 1303 1304 /* 1305 * Bounds checking against the media size, used for the raw partition. 1306 * secsize, mediasize and b_blkno must all be the same units. 1307 * Possibly this has to be DEV_BSIZE (512). 1308 */ 1309 int 1310 bounds_check_with_mediasize(struct bio *bio, int secsize, uint64_t mediasize) 1311 { 1312 struct buf *bp = bio->bio_buf; 1313 int64_t sz; 1314 1315 sz = howmany(bp->b_bcount, secsize); 1316 1317 if (bio->bio_offset/DEV_BSIZE + sz > mediasize) { 1318 sz = mediasize - bio->bio_offset/DEV_BSIZE; 1319 if (sz == 0) { 1320 /* If exactly at end of disk, return EOF. */ 1321 bp->b_resid = bp->b_bcount; 1322 return 0; 1323 } 1324 if (sz < 0) { 1325 /* If past end of disk, return EINVAL. */ 1326 bp->b_error = EINVAL; 1327 return 0; 1328 } 1329 /* Otherwise, truncate request. */ 1330 bp->b_bcount = sz * secsize; 1331 } 1332 1333 return 1; 1334 } 1335 1336 /* 1337 * Disk error is the preface to plaintive error messages 1338 * about failing disk transfers. It prints messages of the form 1339 1340 hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d) 1341 1342 * if the offset of the error in the transfer and a disk label 1343 * are both available. blkdone should be -1 if the position of the error 1344 * is unknown; the disklabel pointer may be null from drivers that have not 1345 * been converted to use them. The message is printed with kprintf 1346 * if pri is LOG_PRINTF, otherwise it uses log at the specified priority. 1347 * The message should be completed (with at least a newline) with kprintf 1348 * or log(-1, ...), respectively. There is no trailing space. 1349 */ 1350 void 1351 diskerr(struct bio *bio, cdev_t dev, const char *what, int pri, int donecnt) 1352 { 1353 struct buf *bp = bio->bio_buf; 1354 const char *term; 1355 1356 switch(bp->b_cmd) { 1357 case BUF_CMD_READ: 1358 term = "read"; 1359 break; 1360 case BUF_CMD_WRITE: 1361 term = "write"; 1362 break; 1363 default: 1364 term = "access"; 1365 break; 1366 } 1367 kprintf("%s: %s %sing ", dev->si_name, what, term); 1368 kprintf("offset %012llx for %d", 1369 (long long)bio->bio_offset, 1370 bp->b_bcount); 1371 1372 if (donecnt) 1373 kprintf(" (%d bytes completed)", donecnt); 1374 } 1375 1376 /* 1377 * Locate a disk device 1378 */ 1379 cdev_t 1380 disk_locate(const char *devname) 1381 { 1382 return devfs_find_device_by_name(devname); 1383 } 1384 1385 void 1386 disk_config(void *arg) 1387 { 1388 disk_msg_send_sync(DISK_SYNC, NULL, NULL); 1389 } 1390 1391 static void 1392 disk_init(void) 1393 { 1394 struct thread* td_core; 1395 1396 disk_msg_cache = objcache_create("disk-msg-cache", 0, 0, 1397 NULL, NULL, NULL, 1398 objcache_malloc_alloc, 1399 objcache_malloc_free, 1400 &disk_msg_malloc_args); 1401 1402 lwkt_token_init(&disklist_token, "disks"); 1403 1404 /* 1405 * Initialize the reply-only port which acts as a message drain 1406 */ 1407 lwkt_initport_replyonly(&disk_dispose_port, disk_msg_autofree_reply); 1408 1409 lwkt_gettoken(&disklist_token); 1410 lwkt_create(disk_msg_core, /*args*/NULL, &td_core, NULL, 1411 0, -1, "disk_msg_core"); 1412 tsleep(td_core, 0, "diskcore", 0); 1413 lwkt_reltoken(&disklist_token); 1414 } 1415 1416 static void 1417 disk_uninit(void) 1418 { 1419 objcache_destroy(disk_msg_cache); 1420 } 1421 1422 /* 1423 * Clean out illegal characters in serial numbers. 1424 */ 1425 static void 1426 disk_cleanserial(char *serno) 1427 { 1428 char c; 1429 1430 while ((c = *serno) != 0) { 1431 if (c >= 'a' && c <= 'z') 1432 ; 1433 else if (c >= 'A' && c <= 'Z') 1434 ; 1435 else if (c >= '0' && c <= '9') 1436 ; 1437 else if (c == '-' || c == '@' || c == '+' || c == '.') 1438 ; 1439 else 1440 c = '_'; 1441 *serno++= c; 1442 } 1443 } 1444 1445 TUNABLE_INT("kern.disk_debug", &disk_debug_enable); 1446 SYSCTL_INT(_kern, OID_AUTO, disk_debug, CTLFLAG_RW, &disk_debug_enable, 1447 0, "Enable subr_disk debugging"); 1448 1449 SYSINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_FIRST, disk_init, NULL); 1450 SYSUNINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_ANY, disk_uninit, NULL); 1451