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