1 /* 2 * Copyright (c) 2003,2004 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 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * ---------------------------------------------------------------------------- 35 * "THE BEER-WARE LICENSE" (Revision 42): 36 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 37 * can do whatever you want with this stuff. If we meet some day, and you think 38 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 39 * ---------------------------------------------------------------------------- 40 * 41 * Copyright (c) 1982, 1986, 1988, 1993 42 * The Regents of the University of California. All rights reserved. 43 * (c) UNIX System Laboratories, Inc. 44 * All or some portions of this file are derived from material licensed 45 * to the University of California by American Telephone and Telegraph 46 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 47 * the permission of UNIX System Laboratories, Inc. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. All advertising materials mentioning features or use of this software 58 * must display the following acknowledgement: 59 * This product includes software developed by the University of 60 * California, Berkeley and its contributors. 61 * 4. Neither the name of the University nor the names of its contributors 62 * may be used to endorse or promote products derived from this software 63 * without specific prior written permission. 64 * 65 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 66 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 67 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 68 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 69 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 73 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 74 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 75 * SUCH DAMAGE. 76 * 77 * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94 78 * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $ 79 * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $ 80 * $DragonFly: src/sys/kern/subr_disk.c,v 1.40 2008/06/05 18:06:32 swildner 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/malloc.h> 97 #include <sys/sysctl.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/msgport2.h> 104 #include <sys/buf2.h> 105 #include <vfs/devfs/devfs.h> 106 #include <sys/thread.h> 107 #include <sys/thread2.h> 108 109 #include <sys/queue.h> 110 #include <sys/lock.h> 111 112 static MALLOC_DEFINE(M_DISK, "disk", "disk data"); 113 114 static void disk_msg_autofree_reply(lwkt_port_t, lwkt_msg_t); 115 static void disk_msg_core(void *); 116 static int disk_probe_slice(struct disk *dp, cdev_t dev, int slice, int reprobe); 117 static void disk_probe(struct disk *dp, int reprobe); 118 static void _setdiskinfo(struct disk *disk, struct disk_info *info); 119 120 static d_open_t diskopen; 121 static d_close_t diskclose; 122 static d_ioctl_t diskioctl; 123 static d_strategy_t diskstrategy; 124 static d_psize_t diskpsize; 125 static d_clone_t diskclone; 126 static d_dump_t diskdump; 127 128 static LIST_HEAD(, disk) disklist = LIST_HEAD_INITIALIZER(&disklist); 129 static struct lwkt_token disklist_token; 130 131 static struct dev_ops disk_ops = { 132 { "disk", 0, D_DISK }, 133 .d_open = diskopen, 134 .d_close = diskclose, 135 .d_read = physread, 136 .d_write = physwrite, 137 .d_ioctl = diskioctl, 138 .d_strategy = diskstrategy, 139 .d_dump = diskdump, 140 .d_psize = diskpsize, 141 .d_clone = diskclone 142 }; 143 144 static struct objcache *disk_msg_cache; 145 146 struct objcache_malloc_args disk_msg_malloc_args = { 147 sizeof(struct disk_msg), M_DISK }; 148 149 static struct lwkt_port disk_dispose_port; 150 static struct lwkt_port disk_msg_port; 151 152 153 static int 154 disk_probe_slice(struct disk *dp, cdev_t dev, int slice, int reprobe) 155 { 156 struct disk_info *info = &dp->d_info; 157 struct diskslice *sp = &dp->d_slice->dss_slices[slice]; 158 disklabel_ops_t ops; 159 struct partinfo part; 160 const char *msg; 161 cdev_t ndev; 162 unsigned long i; 163 164 //lp.opaque = NULL; 165 166 ops = &disklabel32_ops; 167 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info); 168 if (msg && !strcmp(msg, "no disk label")) { 169 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: trying with disklabel64\n"); 170 ops = &disklabel64_ops; 171 msg = ops->op_readdisklabel(dev, sp, &sp->ds_label, info); 172 } 173 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: label: %s\n", (msg)?msg:"is NULL"); 174 if (msg == NULL) { 175 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: found %d partitions in the label\n", ops->op_getnumparts(sp->ds_label)); 176 if (slice != WHOLE_DISK_SLICE) 177 ops->op_adjust_label_reserved(dp->d_slice, slice, sp); 178 else 179 sp->ds_reserved = 0; 180 181 sp->ds_ops = ops; 182 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: lp.opaque: %x\n", sp->ds_label.opaque); 183 for (i = 0; i < ops->op_getnumparts(sp->ds_label); i++) { 184 ops->op_loadpartinfo(sp->ds_label, i, &part); 185 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: partinfo says fstype=%d for part %d\n", part.fstype, i); 186 if (part.fstype) { 187 if (reprobe && 188 (ndev = devfs_find_device_by_name("%s%c", 189 dev->si_name, 'a'+ (char)i))) { 190 /* Device already exists and is still valid */ 191 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice: reprobing and device remained valid, mark it\n"); 192 ndev->si_flags |= SI_REPROBE_TEST; 193 } else { 194 ndev = make_dev(&disk_ops, 195 dkmakeminor(dkunit(dp->d_cdev), slice, i), 196 UID_ROOT, GID_OPERATOR, 0640, 197 "%s%c", dev->si_name, 'a'+ (char)i); 198 ndev->si_disk = dp; 199 if (dp->d_info.d_serialno) { 200 make_dev_alias(ndev, "serno/%s.s%d%c", dp->d_info.d_serialno, slice - 1, 'a' + (char)i); 201 } 202 ndev->si_flags |= SI_REPROBE_TEST; 203 } 204 205 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe_slice:end: lp.opaque: %x\n", ndev->si_disk->d_slice->dss_slices[slice].ds_label.opaque); 206 } 207 } 208 } else if (info->d_dsflags & DSO_COMPATLABEL) { 209 msg = NULL; 210 if (sp->ds_size >= 0x100000000ULL) 211 ops = &disklabel64_ops; 212 else 213 ops = &disklabel32_ops; 214 sp->ds_label = ops->op_clone_label(info, sp); 215 } else { 216 if (sp->ds_type == DOSPTYP_386BSD /* XXX */) 217 log(LOG_WARNING, "%s: cannot find label (%s)\n", 218 dev->si_name, msg); 219 } 220 221 if (msg == NULL) { 222 sp->ds_wlabel = FALSE; 223 } 224 225 return (msg ? EINVAL : 0); 226 } 227 228 229 static void 230 disk_probe(struct disk *dp, int reprobe) 231 { 232 struct disk_info *info = &dp->d_info; 233 cdev_t dev = dp->d_cdev; 234 cdev_t ndev; 235 int error, i; 236 237 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe called for %s\n", dp->d_cdev->si_name); 238 KKASSERT (info->d_media_blksize != 0); 239 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: info set!\n"); 240 241 dp->d_slice = dsmakeslicestruct(BASE_SLICE, info); 242 243 error = mbrinit(dev, info, &(dp->d_slice)); 244 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: &dp->d_slice is: %x, %x\n", &dp->d_slice, dp->d_slice); 245 if (error != 0) { 246 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: mbrinit() failed with error: %d\n", error); 247 return; 248 } else { 249 devfs_debug(DEVFS_DEBUG_DEBUG, "mbrinit succeeded, found %d slices\n", dp->d_slice->dss_nslices); 250 if (dp->d_slice->dss_nslices == BASE_SLICE) { 251 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_size = info->d_media_blocks; 252 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_reserved = 0; 253 if (reprobe && 254 (ndev = devfs_find_device_by_name("%ss%d", 255 dev->si_name, COMPATIBILITY_SLICE))) { 256 /* Device already exists and is still valid */ 257 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: reprobing and device remained valid, mark it\n"); 258 ndev->si_flags |= SI_REPROBE_TEST; 259 } else { 260 ndev = make_dev(&disk_ops, 261 dkmakewholeslice(dkunit(dev), COMPATIBILITY_SLICE), 262 UID_ROOT, GID_OPERATOR, 0640, 263 "%ss%d", dev->si_name, COMPATIBILITY_SLICE); 264 265 ndev->si_disk = dp; 266 if (dp->d_info.d_serialno) { 267 make_dev_alias(ndev, "serno/%s.s%d", 268 dp->d_info.d_serialno, 269 COMPATIBILITY_SLICE); 270 } 271 ndev->si_flags |= SI_REPROBE_TEST; 272 } 273 274 dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_dev = ndev; 275 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: type of slice is :%x\n", dp->d_slice->dss_slices[COMPATIBILITY_SLICE].ds_type ); 276 277 dp->d_slice->dss_first_bsd_slice = COMPATIBILITY_SLICE; 278 disk_probe_slice(dp, ndev, COMPATIBILITY_SLICE, reprobe); 279 280 } 281 for (i = BASE_SLICE; i < dp->d_slice->dss_nslices; i++) { 282 if (dp->d_slice->dss_slices[i].ds_size == 0) 283 continue; 284 285 if (reprobe && 286 (ndev = devfs_find_device_by_name("%ss%d", 287 dev->si_name, i-1))) { 288 /* Device already exists and is still valid */ 289 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe: reprobing and device remained valid, mark it\n"); 290 ndev->si_flags |= SI_REPROBE_TEST; 291 } else { 292 ndev = make_dev(&disk_ops, 293 dkmakewholeslice(dkunit(dev), i), 294 UID_ROOT, GID_OPERATOR, 0640, 295 "%ss%d", dev->si_name, i-1); 296 if (dp->d_info.d_serialno) { 297 make_dev_alias(ndev, "serno/%s.s%d", 298 dp->d_info.d_serialno, 299 i - 1); 300 } 301 ndev->si_disk = dp; 302 ndev->si_flags |= SI_REPROBE_TEST; 303 } 304 dp->d_slice->dss_slices[i].ds_reserved = 0; 305 dp->d_slice->dss_slices[i].ds_dev = ndev; 306 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_probe-> type of slice is :%x\n", dp->d_slice->dss_slices[i].ds_type ); 307 if (dp->d_slice->dss_slices[i].ds_type == DOSPTYP_386BSD) { 308 if (!dp->d_slice->dss_first_bsd_slice) 309 dp->d_slice->dss_first_bsd_slice = i; 310 disk_probe_slice(dp, ndev, i, reprobe); 311 } 312 } 313 } 314 } 315 316 317 static void 318 disk_msg_core(void *arg) 319 { 320 uint8_t run = 1; 321 struct disk *dp; 322 struct diskslice *sp; 323 lwkt_tokref ilock; 324 disk_msg_t msg; 325 326 lwkt_initport_thread(&disk_msg_port, curthread); 327 wakeup(curthread); 328 329 while (run) { 330 msg = (disk_msg_t)lwkt_waitport(&disk_msg_port, 0); 331 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_msg_core, new msg: %x\n", (unsigned int)msg->hdr.u.ms_result); 332 333 switch (msg->hdr.u.ms_result) { 334 335 case DISK_DISK_PROBE: 336 dp = (struct disk *)msg->load; 337 disk_probe(dp, 0); 338 break; 339 340 case DISK_DISK_DESTROY: 341 dp = (struct disk *)msg->load; 342 devfs_destroy_subnames(dp->d_cdev->si_name); 343 devfs_destroy_dev(dp->d_cdev); 344 lwkt_gettoken(&ilock, &disklist_token); 345 LIST_REMOVE(dp, d_list); 346 lwkt_reltoken(&ilock); 347 #if 0 348 devfs_destroy_dev(dp->d_rawdev); /* XXX: needed? when? */ 349 #endif 350 if (dp->d_info.d_serialno) { 351 kfree(dp->d_info.d_serialno, M_TEMP); 352 dp->d_info.d_serialno = NULL; 353 } 354 break; 355 356 case DISK_UNPROBE: 357 dp = (struct disk *)msg->load; 358 devfs_destroy_subnames(dp->d_cdev->si_name); 359 break; 360 361 case DISK_SLICE_REPROBE: 362 dp = (struct disk *)msg->load; 363 sp = (struct diskslice *)msg->load2; 364 devfs_clr_subnames_flag(sp->ds_dev->si_name, SI_REPROBE_TEST); 365 devfs_debug(DEVFS_DEBUG_DEBUG, 366 "DISK_SLICE_REPROBE: %s\n", 367 sp->ds_dev->si_name); 368 disk_probe_slice(dp, sp->ds_dev, dkslice(sp->ds_dev), 1); 369 devfs_destroy_subnames_without_flag(sp->ds_dev->si_name, 370 SI_REPROBE_TEST); 371 break; 372 373 case DISK_DISK_REPROBE: 374 dp = (struct disk *)msg->load; 375 devfs_clr_subnames_flag(dp->d_cdev->si_name, SI_REPROBE_TEST); 376 devfs_debug(DEVFS_DEBUG_DEBUG, 377 "DISK_DISK_REPROBE: %s\n", 378 dp->d_cdev->si_name); 379 disk_probe(dp, 1); 380 devfs_destroy_subnames_without_flag(dp->d_cdev->si_name, 381 SI_REPROBE_TEST); 382 break; 383 384 case DISK_SYNC: 385 break; 386 387 default: 388 devfs_debug(DEVFS_DEBUG_WARNING, "disk_msg_core: unknown message received at core\n"); 389 } 390 391 lwkt_replymsg((lwkt_msg_t)msg, 0); 392 } 393 lwkt_exit(); 394 } 395 396 397 /** 398 * Acts as a message drain. Any message that is replied to here gets destroyed and 399 * the memory freed. 400 **/ 401 static void 402 disk_msg_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 403 { 404 objcache_put(disk_msg_cache, msg); 405 } 406 407 408 void 409 disk_msg_send(uint32_t cmd, void *load, void *load2) 410 { 411 disk_msg_t disk_msg; 412 lwkt_port_t port = &disk_msg_port; 413 414 disk_msg = objcache_get(disk_msg_cache, M_WAITOK); 415 416 lwkt_initmsg(&disk_msg->hdr, &disk_dispose_port, 0); 417 418 disk_msg->hdr.u.ms_result = cmd; 419 disk_msg->load = load; 420 disk_msg->load2 = load2; 421 KKASSERT(port); 422 lwkt_sendmsg(port, (lwkt_msg_t)disk_msg); 423 } 424 425 void 426 disk_msg_send_sync(uint32_t cmd, void *load, void *load2) 427 { 428 struct lwkt_port rep_port; 429 disk_msg_t disk_msg = objcache_get(disk_msg_cache, M_WAITOK); 430 disk_msg_t msg_incoming; 431 lwkt_port_t port = &disk_msg_port; 432 433 lwkt_initport_thread(&rep_port, curthread); 434 lwkt_initmsg(&disk_msg->hdr, &rep_port, 0); 435 436 disk_msg->hdr.u.ms_result = cmd; 437 disk_msg->load = load; 438 disk_msg->load2 = load2; 439 440 KKASSERT(port); 441 lwkt_sendmsg(port, (lwkt_msg_t)disk_msg); 442 msg_incoming = lwkt_waitport(&rep_port, 0); 443 } 444 445 /* 446 * Create a raw device for the dev_ops template (which is returned). Also 447 * create a slice and unit managed disk and overload the user visible 448 * device space with it. 449 * 450 * NOTE: The returned raw device is NOT a slice and unit managed device. 451 * It is an actual raw device representing the raw disk as specified by 452 * the passed dev_ops. The disk layer not only returns such a raw device, 453 * it also uses it internally when passing (modified) commands through. 454 */ 455 cdev_t 456 disk_create(int unit, struct disk *dp, struct dev_ops *raw_ops) 457 { 458 lwkt_tokref ilock; 459 cdev_t rawdev; 460 461 rawdev = make_only_dev(raw_ops, dkmakewholedisk(unit), 462 UID_ROOT, GID_OPERATOR, 0640, 463 "%s%d", raw_ops->head.name, unit); 464 465 466 bzero(dp, sizeof(*dp)); 467 468 dp->d_rawdev = rawdev; 469 dp->d_raw_ops = raw_ops; 470 dp->d_dev_ops = &disk_ops; 471 dp->d_cdev = make_dev(&disk_ops, 472 dkmakewholedisk(unit), 473 UID_ROOT, GID_OPERATOR, 0640, 474 "%s%d", raw_ops->head.name, unit); 475 476 dp->d_cdev->si_disk = dp; 477 478 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_create called for %s\n", 479 dp->d_cdev->si_name); 480 lwkt_gettoken(&ilock, &disklist_token); 481 LIST_INSERT_HEAD(&disklist, dp, d_list); 482 lwkt_reltoken(&ilock); 483 return (dp->d_rawdev); 484 } 485 486 487 static void 488 _setdiskinfo(struct disk *disk, struct disk_info *info) 489 { 490 char *oldserialno; 491 492 devfs_debug(DEVFS_DEBUG_DEBUG, 493 "_setdiskinfo called for disk -1-: %x\n", disk); 494 oldserialno = disk->d_info.d_serialno; 495 bcopy(info, &disk->d_info, sizeof(disk->d_info)); 496 info = &disk->d_info; 497 498 /* 499 * The serial number is duplicated so the caller can throw 500 * their copy away. 501 */ 502 if (info->d_serialno && info->d_serialno[0]) { 503 info->d_serialno = kstrdup(info->d_serialno, M_TEMP); 504 if (disk->d_cdev) { 505 make_dev_alias(disk->d_cdev, "serno/%s", 506 info->d_serialno); 507 } 508 } else { 509 info->d_serialno = NULL; 510 } 511 if (oldserialno) 512 kfree(oldserialno, M_TEMP); 513 514 /* 515 * The caller may set d_media_size or d_media_blocks and we 516 * calculate the other. 517 */ 518 KKASSERT(info->d_media_size == 0 || info->d_media_blksize == 0); 519 if (info->d_media_size == 0 && info->d_media_blocks) { 520 info->d_media_size = (u_int64_t)info->d_media_blocks * 521 info->d_media_blksize; 522 } else if (info->d_media_size && info->d_media_blocks == 0 && 523 info->d_media_blksize) { 524 info->d_media_blocks = info->d_media_size / 525 info->d_media_blksize; 526 } 527 528 /* 529 * The si_* fields for rawdev are not set until after the 530 * disk_create() call, so someone using the cooked version 531 * of the raw device (i.e. da0s0) will not get the right 532 * si_iosize_max unless we fix it up here. 533 */ 534 if (disk->d_cdev && disk->d_rawdev && 535 disk->d_cdev->si_iosize_max == 0) { 536 disk->d_cdev->si_iosize_max = disk->d_rawdev->si_iosize_max; 537 disk->d_cdev->si_bsize_phys = disk->d_rawdev->si_bsize_phys; 538 disk->d_cdev->si_bsize_best = disk->d_rawdev->si_bsize_best; 539 } 540 } 541 542 /* 543 * Disk drivers must call this routine when media parameters are available 544 * or have changed. 545 */ 546 void 547 disk_setdiskinfo(struct disk *disk, struct disk_info *info) 548 { 549 _setdiskinfo(disk, info); 550 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_setdiskinfo called for disk -2-: %x\n", disk); 551 disk_msg_send(DISK_DISK_PROBE, disk, NULL); 552 } 553 554 void 555 disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info) 556 { 557 _setdiskinfo(disk, info); 558 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_setdiskinfo_sync called for disk -2-: %x\n", disk); 559 disk_msg_send_sync(DISK_DISK_PROBE, disk, NULL); 560 } 561 562 /* 563 * This routine is called when an adapter detaches. The higher level 564 * managed disk device is destroyed while the lower level raw device is 565 * released. 566 */ 567 void 568 disk_destroy(struct disk *disk) 569 { 570 disk_msg_send_sync(DISK_DISK_DESTROY, disk, NULL); 571 return; 572 } 573 574 int 575 disk_dumpcheck(cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize) 576 { 577 struct partinfo pinfo; 578 int error; 579 580 bzero(&pinfo, sizeof(pinfo)); 581 error = dev_dioctl(dev, DIOCGPART, (void *)&pinfo, 0, proc0.p_ucred); 582 if (error) 583 return (error); 584 if (pinfo.media_blksize == 0) 585 return (ENXIO); 586 *count = (u_int64_t)Maxmem * PAGE_SIZE / pinfo.media_blksize; 587 if (dumplo64 < pinfo.reserved_blocks || 588 dumplo64 + *count > pinfo.media_blocks) { 589 return (ENOSPC); 590 } 591 *blkno = dumplo64 + pinfo.media_offset / pinfo.media_blksize; 592 *secsize = pinfo.media_blksize; 593 return (0); 594 } 595 596 void 597 disk_unprobe(struct disk *disk) 598 { 599 if (disk == NULL) 600 return; 601 602 disk_msg_send_sync(DISK_UNPROBE, disk, NULL); 603 } 604 605 void 606 disk_invalidate (struct disk *disk) 607 { 608 devfs_debug(DEVFS_DEBUG_INFO, "disk_invalidate for %s\n", disk->d_cdev->si_name); 609 if (disk->d_slice) 610 dsgone(&disk->d_slice); 611 } 612 613 struct disk * 614 disk_enumerate(struct disk *disk) 615 { 616 struct disk *dp; 617 lwkt_tokref ilock; 618 619 lwkt_gettoken(&ilock, &disklist_token); 620 if (!disk) 621 dp = (LIST_FIRST(&disklist)); 622 else 623 dp = (LIST_NEXT(disk, d_list)); 624 lwkt_reltoken(&ilock); 625 626 return dp; 627 } 628 629 static 630 int 631 sysctl_disks(SYSCTL_HANDLER_ARGS) 632 { 633 struct disk *disk; 634 int error, first; 635 636 disk = NULL; 637 first = 1; 638 639 while ((disk = disk_enumerate(disk))) { 640 if (!first) { 641 error = SYSCTL_OUT(req, " ", 1); 642 if (error) 643 return error; 644 } else { 645 first = 0; 646 } 647 error = SYSCTL_OUT(req, disk->d_rawdev->si_name, 648 strlen(disk->d_rawdev->si_name)); 649 if (error) 650 return error; 651 } 652 error = SYSCTL_OUT(req, "", 1); 653 return error; 654 } 655 656 SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD, NULL, 0, 657 sysctl_disks, "A", "names of available disks"); 658 659 /* 660 * Open a disk device or partition. 661 */ 662 static 663 int 664 diskopen(struct dev_open_args *ap) 665 { 666 cdev_t dev = ap->a_head.a_dev; 667 struct disk *dp; 668 int error; 669 670 devfs_debug(DEVFS_DEBUG_DEBUG, "diskopen: name is %s\n", dev->si_name); 671 672 /* 673 * dp can't be NULL here XXX. 674 */ 675 dp = dev->si_disk; 676 if (dp == NULL) 677 return (ENXIO); 678 error = 0; 679 680 /* 681 * Deal with open races 682 */ 683 while (dp->d_flags & DISKFLAG_LOCK) { 684 dp->d_flags |= DISKFLAG_WANTED; 685 error = tsleep(dp, PCATCH, "diskopen", hz); 686 if (error) 687 return (error); 688 } 689 dp->d_flags |= DISKFLAG_LOCK; 690 691 devfs_debug(DEVFS_DEBUG_DEBUG, "diskopen: -2- name is %s\n", dev->si_name); 692 693 /* 694 * Open the underlying raw device. 695 */ 696 if (!dsisopen(dp->d_slice)) { 697 #if 0 698 if (!pdev->si_iosize_max) 699 pdev->si_iosize_max = dev->si_iosize_max; 700 #endif 701 error = dev_dopen(dp->d_rawdev, ap->a_oflags, 702 ap->a_devtype, ap->a_cred); 703 } 704 #if 0 705 /* 706 * Inherit properties from the underlying device now that it is 707 * open. 708 */ 709 dev_dclone(dev); 710 #endif 711 712 if (error) 713 goto out; 714 error = dsopen(dev, ap->a_devtype, dp->d_info.d_dsflags, 715 &dp->d_slice, &dp->d_info); 716 if (!dsisopen(dp->d_slice)) { 717 dev_dclose(dp->d_rawdev, ap->a_oflags, ap->a_devtype); 718 } 719 out: 720 dp->d_flags &= ~DISKFLAG_LOCK; 721 if (dp->d_flags & DISKFLAG_WANTED) { 722 dp->d_flags &= ~DISKFLAG_WANTED; 723 wakeup(dp); 724 } 725 726 return(error); 727 } 728 729 /* 730 * Close a disk device or partition 731 */ 732 static 733 int 734 diskclose(struct dev_close_args *ap) 735 { 736 cdev_t dev = ap->a_head.a_dev; 737 struct disk *dp; 738 int error; 739 740 error = 0; 741 dp = dev->si_disk; 742 743 devfs_debug(DEVFS_DEBUG_DEBUG, "diskclose: name %s\n", dev->si_name); 744 745 dsclose(dev, ap->a_devtype, dp->d_slice); 746 if (!dsisopen(dp->d_slice)) { 747 devfs_debug(DEVFS_DEBUG_DEBUG, "diskclose is closing underlying device\n"); 748 error = dev_dclose(dp->d_rawdev, ap->a_fflag, ap->a_devtype); 749 } 750 return (error); 751 } 752 753 /* 754 * First execute the ioctl on the disk device, and if it isn't supported 755 * try running it on the backing device. 756 */ 757 static 758 int 759 diskioctl(struct dev_ioctl_args *ap) 760 { 761 cdev_t dev = ap->a_head.a_dev; 762 struct disk *dp; 763 int error; 764 765 dp = dev->si_disk; 766 if (dp == NULL) 767 return (ENXIO); 768 769 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: cmd is: %x (name: %s)\n", ap->a_cmd, dev->si_name); 770 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: &dp->d_slice is: %x, %x\n", &dp->d_slice, dp->d_slice); 771 772 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl:1: says lp.opaque is: %x\n", dp->d_slice->dss_slices[0].ds_label.opaque); 773 774 error = dsioctl(dev, ap->a_cmd, ap->a_data, ap->a_fflag, 775 &dp->d_slice, &dp->d_info); 776 777 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl:2: says lp.opaque is: %x\n", dp->d_slice->dss_slices[0].ds_label.opaque); 778 779 if (error == ENOIOCTL) { 780 devfs_debug(DEVFS_DEBUG_DEBUG, "diskioctl: going for dev_dioctl instead!\n"); 781 error = dev_dioctl(dp->d_rawdev, ap->a_cmd, ap->a_data, 782 ap->a_fflag, ap->a_cred); 783 } 784 return (error); 785 } 786 787 /* 788 * Execute strategy routine 789 */ 790 static 791 int 792 diskstrategy(struct dev_strategy_args *ap) 793 { 794 cdev_t dev = ap->a_head.a_dev; 795 struct bio *bio = ap->a_bio; 796 struct bio *nbio; 797 struct disk *dp; 798 799 dp = dev->si_disk; 800 801 if (dp == NULL) { 802 bio->bio_buf->b_error = ENXIO; 803 bio->bio_buf->b_flags |= B_ERROR; 804 biodone(bio); 805 return(0); 806 } 807 KKASSERT(dev->si_disk == dp); 808 809 /* 810 * The dscheck() function will also transform the slice relative 811 * block number i.e. bio->bio_offset into a block number that can be 812 * passed directly to the underlying raw device. If dscheck() 813 * returns NULL it will have handled the bio for us (e.g. EOF 814 * or error due to being beyond the device size). 815 */ 816 if ((nbio = dscheck(dev, bio, dp->d_slice)) != NULL) { 817 dev_dstrategy(dp->d_rawdev, nbio); 818 } else { 819 devfs_debug(DEVFS_DEBUG_DEBUG, "diskstrategy: dscheck NULL!!! biodone time!\n"); 820 biodone(bio); 821 } 822 return(0); 823 } 824 825 /* 826 * Return the partition size in ?blocks? 827 */ 828 static 829 int 830 diskpsize(struct dev_psize_args *ap) 831 { 832 cdev_t dev = ap->a_head.a_dev; 833 struct disk *dp; 834 835 dp = dev->si_disk; 836 if (dp == NULL) 837 return(ENODEV); 838 ap->a_result = dssize(dev, &dp->d_slice); 839 return(0); 840 } 841 842 /* 843 * When new device entries are instantiated, make sure they inherit our 844 * si_disk structure and block and iosize limits from the raw device. 845 * 846 * This routine is always called synchronously in the context of the 847 * client. 848 * 849 * XXX The various io and block size constraints are not always initialized 850 * properly by devices. 851 */ 852 static 853 int 854 diskclone(struct dev_clone_args *ap) 855 { 856 cdev_t dev = ap->a_head.a_dev; 857 struct disk *dp; 858 dp = dev->si_disk; 859 860 KKASSERT(dp != NULL); 861 dev->si_disk = dp; 862 dev->si_iosize_max = dp->d_rawdev->si_iosize_max; 863 dev->si_bsize_phys = dp->d_rawdev->si_bsize_phys; 864 dev->si_bsize_best = dp->d_rawdev->si_bsize_best; 865 return(0); 866 } 867 868 int 869 diskdump(struct dev_dump_args *ap) 870 { 871 cdev_t dev = ap->a_head.a_dev; 872 struct disk *dp = dev->si_disk; 873 int error; 874 875 error = disk_dumpcheck(dev, &ap->a_count, &ap->a_blkno, &ap->a_secsize); 876 if (error == 0) { 877 ap->a_head.a_dev = dp->d_rawdev; 878 error = dev_doperate(&ap->a_head); 879 } 880 881 return(error); 882 } 883 884 885 SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD, 886 0, sizeof(struct diskslices), "sizeof(struct diskslices)"); 887 888 SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD, 889 0, sizeof(struct disk), "sizeof(struct disk)"); 890 891 892 /* 893 * Seek sort for disks. 894 * 895 * The bio_queue keep two queues, sorted in ascending block order. The first 896 * queue holds those requests which are positioned after the current block 897 * (in the first request); the second, which starts at queue->switch_point, 898 * holds requests which came in after their block number was passed. Thus 899 * we implement a one way scan, retracting after reaching the end of the drive 900 * to the first request on the second queue, at which time it becomes the 901 * first queue. 902 * 903 * A one-way scan is natural because of the way UNIX read-ahead blocks are 904 * allocated. 905 */ 906 void 907 bioqdisksort(struct bio_queue_head *bioq, struct bio *bio) 908 { 909 struct bio *bq; 910 struct bio *bn; 911 struct bio *be; 912 913 be = TAILQ_LAST(&bioq->queue, bio_queue); 914 /* 915 * If the queue is empty or we are an 916 * ordered transaction, then it's easy. 917 */ 918 if ((bq = bioq_first(bioq)) == NULL || 919 (bio->bio_buf->b_flags & B_ORDERED) != 0) { 920 bioq_insert_tail(bioq, bio); 921 return; 922 } else if (bioq->insert_point != NULL) { 923 924 /* 925 * A certain portion of the list is 926 * "locked" to preserve ordering, so 927 * we can only insert after the insert 928 * point. 929 */ 930 bq = bioq->insert_point; 931 } else { 932 933 /* 934 * If we lie before the last removed (currently active) 935 * request, and are not inserting ourselves into the 936 * "locked" portion of the list, then we must add ourselves 937 * to the second request list. 938 */ 939 if (bio->bio_offset < bioq->last_offset) { 940 bq = bioq->switch_point; 941 /* 942 * If we are starting a new secondary list, 943 * then it's easy. 944 */ 945 if (bq == NULL) { 946 bioq->switch_point = bio; 947 bioq_insert_tail(bioq, bio); 948 return; 949 } 950 /* 951 * If we lie ahead of the current switch point, 952 * insert us before the switch point and move 953 * the switch point. 954 */ 955 if (bio->bio_offset < bq->bio_offset) { 956 bioq->switch_point = bio; 957 TAILQ_INSERT_BEFORE(bq, bio, bio_act); 958 return; 959 } 960 } else { 961 if (bioq->switch_point != NULL) 962 be = TAILQ_PREV(bioq->switch_point, 963 bio_queue, bio_act); 964 /* 965 * If we lie between last_offset and bq, 966 * insert before bq. 967 */ 968 if (bio->bio_offset < bq->bio_offset) { 969 TAILQ_INSERT_BEFORE(bq, bio, bio_act); 970 return; 971 } 972 } 973 } 974 975 /* 976 * Request is at/after our current position in the list. 977 * Optimize for sequential I/O by seeing if we go at the tail. 978 */ 979 if (bio->bio_offset > be->bio_offset) { 980 TAILQ_INSERT_AFTER(&bioq->queue, be, bio, bio_act); 981 return; 982 } 983 984 /* Otherwise, insertion sort */ 985 while ((bn = TAILQ_NEXT(bq, bio_act)) != NULL) { 986 987 /* 988 * We want to go after the current request if it is the end 989 * of the first request list, or if the next request is a 990 * larger cylinder than our request. 991 */ 992 if (bn == bioq->switch_point 993 || bio->bio_offset < bn->bio_offset) 994 break; 995 bq = bn; 996 } 997 TAILQ_INSERT_AFTER(&bioq->queue, bq, bio, bio_act); 998 } 999 1000 /* 1001 * Disk error is the preface to plaintive error messages 1002 * about failing disk transfers. It prints messages of the form 1003 1004 hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d) 1005 1006 * if the offset of the error in the transfer and a disk label 1007 * are both available. blkdone should be -1 if the position of the error 1008 * is unknown; the disklabel pointer may be null from drivers that have not 1009 * been converted to use them. The message is printed with kprintf 1010 * if pri is LOG_PRINTF, otherwise it uses log at the specified priority. 1011 * The message should be completed (with at least a newline) with kprintf 1012 * or log(-1, ...), respectively. There is no trailing space. 1013 */ 1014 void 1015 diskerr(struct bio *bio, cdev_t dev, const char *what, int pri, int donecnt) 1016 { 1017 struct buf *bp = bio->bio_buf; 1018 const char *term; 1019 1020 switch(bp->b_cmd) { 1021 case BUF_CMD_READ: 1022 term = "read"; 1023 break; 1024 case BUF_CMD_WRITE: 1025 term = "write"; 1026 break; 1027 default: 1028 term = "access"; 1029 break; 1030 } 1031 //sname = dsname(dev, unit, slice, part, partname); 1032 kprintf("%s: %s %sing ", dev->si_name, what, term); 1033 kprintf("offset %012llx for %d", 1034 (long long)bio->bio_offset, 1035 bp->b_bcount); 1036 1037 if (donecnt) 1038 kprintf(" (%d bytes completed)", donecnt); 1039 } 1040 1041 /* 1042 * Locate a disk device 1043 */ 1044 cdev_t 1045 disk_locate(const char *devname) 1046 { 1047 return devfs_find_device_by_name(devname); 1048 } 1049 1050 1051 void 1052 disk_config(void *arg) 1053 { 1054 disk_msg_send_sync(DISK_SYNC, NULL, NULL); 1055 } 1056 1057 1058 static void 1059 disk_init(void) 1060 { 1061 struct thread* td_core; 1062 devfs_debug(DEVFS_DEBUG_DEBUG, "disk_init() called\n"); 1063 1064 disk_msg_cache = objcache_create("disk-msg-cache", 0, 0, 1065 NULL, NULL, NULL, 1066 objcache_malloc_alloc, 1067 objcache_malloc_free, 1068 &disk_msg_malloc_args ); 1069 1070 lwkt_token_init(&disklist_token); 1071 1072 /* Initialize the reply-only port which acts as a message drain */ 1073 lwkt_initport_replyonly(&disk_dispose_port, disk_msg_autofree_reply); 1074 1075 lwkt_create(disk_msg_core, /*args*/NULL, &td_core, NULL, 1076 0, 0, "disk_msg_core"); 1077 1078 tsleep(td_core, 0, "diskcore", 0); 1079 } 1080 1081 1082 static void 1083 disk_uninit(void) 1084 { 1085 devfs_debug(DEVFS_DEBUG_DEBUG, "devfs_uninit() called\n"); 1086 1087 objcache_destroy(disk_msg_cache); 1088 1089 } 1090 1091 1092 SYSINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_FIRST, disk_init, NULL); 1093 SYSUNINIT(disk_register, SI_SUB_PRE_DRIVERS, SI_ORDER_ANY, disk_uninit, NULL); 1094