1 /*- 2 * Copyright (c) 2008 Yahoo!, Inc. 3 * All rights reserved. 4 * Written by: John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __RCSID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #include <camlib.h> 43 #include <cam/scsi/scsi_message.h> 44 #include <cam/scsi/scsi_pass.h> 45 46 #include "mptutil.h" 47 48 static int xptfd; 49 50 static int 51 xpt_open(void) 52 { 53 54 if (xptfd == 0) 55 xptfd = open(XPT_DEVICE, O_RDWR); 56 return (xptfd); 57 } 58 59 /* Fetch the path id of bus 0 for the opened mpt controller. */ 60 static int 61 fetch_path_id(path_id_t *path_id) 62 { 63 struct bus_match_pattern *b; 64 union ccb ccb; 65 size_t bufsize; 66 int error; 67 68 if (xpt_open() < 0) 69 return (ENXIO); 70 71 /* First, find the path id of bus 0 for this mpt controller. */ 72 bzero(&ccb, sizeof(ccb)); 73 74 ccb.ccb_h.func_code = XPT_DEV_MATCH; 75 76 bufsize = sizeof(struct dev_match_result) * 1; 77 ccb.cdm.num_matches = 0; 78 ccb.cdm.match_buf_len = bufsize; 79 ccb.cdm.matches = calloc(1, bufsize); 80 81 bufsize = sizeof(struct dev_match_pattern) * 1; 82 ccb.cdm.num_patterns = 1; 83 ccb.cdm.pattern_buf_len = bufsize; 84 ccb.cdm.patterns = calloc(1, bufsize); 85 86 /* Match mptX bus 0. */ 87 ccb.cdm.patterns[0].type = DEV_MATCH_BUS; 88 b = &ccb.cdm.patterns[0].pattern.bus_pattern; 89 snprintf(b->dev_name, sizeof(b->dev_name), "mpt"); 90 b->unit_number = mpt_unit; 91 b->bus_id = 0; 92 b->flags = BUS_MATCH_NAME | BUS_MATCH_UNIT | BUS_MATCH_BUS_ID; 93 94 if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) { 95 error = errno; 96 free(ccb.cdm.matches); 97 free(ccb.cdm.patterns); 98 return (error); 99 } 100 free(ccb.cdm.patterns); 101 102 if (((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) || 103 (ccb.cdm.status != CAM_DEV_MATCH_LAST)) { 104 warnx("fetch_path_id got CAM error %#x, CDM error %d\n", 105 ccb.ccb_h.status, ccb.cdm.status); 106 free(ccb.cdm.matches); 107 return (EIO); 108 } 109 110 /* We should have exactly 1 match for the bus. */ 111 if (ccb.cdm.num_matches != 1 || 112 ccb.cdm.matches[0].type != DEV_MATCH_BUS) { 113 free(ccb.cdm.matches); 114 return (ENOENT); 115 } 116 *path_id = ccb.cdm.matches[0].result.bus_result.path_id; 117 free(ccb.cdm.matches); 118 return (0); 119 } 120 121 int 122 mpt_query_disk(U8 VolumeBus, U8 VolumeID, struct mpt_query_disk *qd) 123 { 124 struct periph_match_pattern *p; 125 struct periph_match_result *r; 126 union ccb ccb; 127 path_id_t path_id; 128 size_t bufsize; 129 int error; 130 131 /* mpt(4) only handles devices on bus 0. */ 132 if (VolumeBus != 0) 133 return (ENXIO); 134 135 if (xpt_open() < 0) 136 return (ENXIO); 137 138 /* Find the path ID of bus 0. */ 139 error = fetch_path_id(&path_id); 140 if (error) 141 return (error); 142 143 bzero(&ccb, sizeof(ccb)); 144 145 ccb.ccb_h.func_code = XPT_DEV_MATCH; 146 ccb.ccb_h.path_id = CAM_XPT_PATH_ID; 147 ccb.ccb_h.target_id = CAM_TARGET_WILDCARD; 148 ccb.ccb_h.target_lun = CAM_LUN_WILDCARD; 149 150 bufsize = sizeof(struct dev_match_result) * 5; 151 ccb.cdm.num_matches = 0; 152 ccb.cdm.match_buf_len = bufsize; 153 ccb.cdm.matches = calloc(1, bufsize); 154 155 bufsize = sizeof(struct dev_match_pattern) * 1; 156 ccb.cdm.num_patterns = 1; 157 ccb.cdm.pattern_buf_len = bufsize; 158 ccb.cdm.patterns = calloc(1, bufsize); 159 160 /* Look for a "da" device at the specified target and lun. */ 161 ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH; 162 p = &ccb.cdm.patterns[0].pattern.periph_pattern; 163 p->path_id = path_id; 164 snprintf(p->periph_name, sizeof(p->periph_name), "da"); 165 p->target_id = VolumeID; 166 p->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_NAME | PERIPH_MATCH_TARGET; 167 168 if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) { 169 error = errno; 170 free(ccb.cdm.matches); 171 free(ccb.cdm.patterns); 172 return (error); 173 } 174 free(ccb.cdm.patterns); 175 176 if (((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) || 177 (ccb.cdm.status != CAM_DEV_MATCH_LAST)) { 178 warnx("mpt_query_disk got CAM error %#x, CDM error %d\n", 179 ccb.ccb_h.status, ccb.cdm.status); 180 free(ccb.cdm.matches); 181 return (EIO); 182 } 183 184 /* 185 * We should have exactly 1 match for the peripheral. 186 * However, if we don't get a match, don't print an error 187 * message and return ENOENT. 188 */ 189 if (ccb.cdm.num_matches == 0) { 190 free(ccb.cdm.matches); 191 return (ENOENT); 192 } 193 if (ccb.cdm.num_matches != 1) { 194 warnx("mpt_query_disk got %d matches, expected 1", 195 ccb.cdm.num_matches); 196 free(ccb.cdm.matches); 197 return (EIO); 198 } 199 if (ccb.cdm.matches[0].type != DEV_MATCH_PERIPH) { 200 warnx("mpt_query_disk got wrong CAM match"); 201 free(ccb.cdm.matches); 202 return (EIO); 203 } 204 205 /* Copy out the data. */ 206 r = &ccb.cdm.matches[1].result.periph_result; 207 snprintf(qd->devname, sizeof(qd->devname), "%s%d", r->periph_name, 208 r->unit_number); 209 free(ccb.cdm.matches); 210 211 return (0); 212 } 213 214 static int 215 periph_is_volume(CONFIG_PAGE_IOC_2 *ioc2, struct periph_match_result *r) 216 { 217 CONFIG_PAGE_IOC_2_RAID_VOL *vol; 218 int i; 219 220 if (ioc2 == NULL) 221 return (0); 222 vol = ioc2->RaidVolume; 223 for (i = 0; i < ioc2->NumActiveVolumes; vol++, i++) { 224 if (vol->VolumeBus == 0 && vol->VolumeID == r->target_id) 225 return (1); 226 } 227 return (0); 228 } 229 230 /* Much borrowed from scsireadcapacity() in src/sbin/camcontrol/camcontrol.c. */ 231 static int 232 fetch_scsi_capacity(struct cam_device *dev, struct mpt_standalone_disk *disk) 233 { 234 struct scsi_read_capacity_data rcap; 235 struct scsi_read_capacity_data_long rcaplong; 236 union ccb *ccb; 237 int error; 238 239 ccb = cam_getccb(dev); 240 if (ccb == NULL) 241 return (ENOMEM); 242 243 /* Zero the rest of the ccb. */ 244 CCB_CLEAR_ALL_EXCEPT_HDR(&ccb->csio); 245 246 scsi_read_capacity(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, &rcap, 247 SSD_FULL_SIZE, 5000); 248 249 /* Disable freezing the device queue */ 250 ccb->ccb_h.flags |= CAM_DEV_QFRZDIS; 251 252 if (cam_send_ccb(dev, ccb) < 0) { 253 error = errno; 254 cam_freeccb(ccb); 255 return (error); 256 } 257 258 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 259 cam_freeccb(ccb); 260 return (EIO); 261 } 262 263 /* 264 * A last block of 2^32-1 means that the true capacity is over 2TB, 265 * and we need to issue the long READ CAPACITY to get the real 266 * capacity. Otherwise, we're all set. 267 */ 268 if (scsi_4btoul(rcap.addr) != 0xffffffff) { 269 disk->maxlba = scsi_4btoul(rcap.addr); 270 cam_freeccb(ccb); 271 return (0); 272 } 273 274 /* Zero the rest of the ccb. */ 275 CCB_CLEAR_ALL_EXCEPT_HDR(&ccb->csio); 276 277 scsi_read_capacity_16(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, 0, 0, 0, 278 (uint8_t *)&rcaplong, sizeof(rcaplong), SSD_FULL_SIZE, 5000); 279 280 /* Disable freezing the device queue */ 281 ccb->ccb_h.flags |= CAM_DEV_QFRZDIS; 282 283 if (cam_send_ccb(dev, ccb) < 0) { 284 error = errno; 285 cam_freeccb(ccb); 286 return (error); 287 } 288 289 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 290 cam_freeccb(ccb); 291 return (EIO); 292 } 293 cam_freeccb(ccb); 294 295 disk->maxlba = scsi_8btou64(rcaplong.addr); 296 return (0); 297 } 298 299 /* Borrowed heavily from scsi_all.c:scsi_print_inquiry(). */ 300 static void 301 format_scsi_inquiry(struct mpt_standalone_disk *disk, 302 struct scsi_inquiry_data *inq_data) 303 { 304 char vendor[16], product[48], revision[16], rstr[12]; 305 306 if (SID_QUAL_IS_VENDOR_UNIQUE(inq_data)) 307 return; 308 if (SID_TYPE(inq_data) != T_DIRECT) 309 return; 310 if (SID_QUAL(inq_data) != SID_QUAL_LU_CONNECTED) 311 return; 312 313 cam_strvis(vendor, inq_data->vendor, sizeof(inq_data->vendor), 314 sizeof(vendor)); 315 cam_strvis(product, inq_data->product, sizeof(inq_data->product), 316 sizeof(product)); 317 cam_strvis(revision, inq_data->revision, sizeof(inq_data->revision), 318 sizeof(revision)); 319 320 /* Hack for SATA disks, no idea how to tell speed. */ 321 if (strcmp(vendor, "ATA") == 0) { 322 snprintf(disk->inqstring, sizeof(disk->inqstring), 323 "<%s %s> SATA", product, revision); 324 return; 325 } 326 327 switch (SID_ANSI_REV(inq_data)) { 328 case SCSI_REV_CCS: 329 strcpy(rstr, "SCSI-CCS"); 330 break; 331 case 5: 332 strcpy(rstr, "SAS"); 333 break; 334 default: 335 snprintf(rstr, sizeof (rstr), "SCSI-%d", 336 SID_ANSI_REV(inq_data)); 337 break; 338 } 339 snprintf(disk->inqstring, sizeof(disk->inqstring), "<%s %s %s> %s", 340 vendor, product, revision, rstr); 341 } 342 343 /* Much borrowed from scsiinquiry() in src/sbin/camcontrol/camcontrol.c. */ 344 static int 345 fetch_scsi_inquiry(struct cam_device *dev, struct mpt_standalone_disk *disk) 346 { 347 struct scsi_inquiry_data *inq_buf; 348 union ccb *ccb; 349 int error; 350 351 ccb = cam_getccb(dev); 352 if (ccb == NULL) 353 return (ENOMEM); 354 355 /* Zero the rest of the ccb. */ 356 CCB_CLEAR_ALL_EXCEPT_HDR(&ccb->csio); 357 358 inq_buf = calloc(1, sizeof(*inq_buf)); 359 if (inq_buf == NULL) { 360 cam_freeccb(ccb); 361 return (ENOMEM); 362 } 363 scsi_inquiry(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, (void *)inq_buf, 364 SHORT_INQUIRY_LENGTH, 0, 0, SSD_FULL_SIZE, 5000); 365 366 /* Disable freezing the device queue */ 367 ccb->ccb_h.flags |= CAM_DEV_QFRZDIS; 368 369 if (cam_send_ccb(dev, ccb) < 0) { 370 error = errno; 371 free(inq_buf); 372 cam_freeccb(ccb); 373 return (error); 374 } 375 376 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 377 free(inq_buf); 378 cam_freeccb(ccb); 379 return (EIO); 380 } 381 382 cam_freeccb(ccb); 383 format_scsi_inquiry(disk, inq_buf); 384 free(inq_buf); 385 return (0); 386 } 387 388 int 389 mpt_fetch_disks(int fd, int *ndisks, struct mpt_standalone_disk **disksp) 390 { 391 CONFIG_PAGE_IOC_2 *ioc2; 392 struct mpt_standalone_disk *disks; 393 struct periph_match_pattern *p; 394 struct periph_match_result *r; 395 struct cam_device *dev; 396 union ccb ccb; 397 path_id_t path_id; 398 size_t bufsize; 399 int count, error; 400 uint32_t i; 401 402 if (xpt_open() < 0) 403 return (ENXIO); 404 405 error = fetch_path_id(&path_id); 406 if (error) 407 return (error); 408 409 for (count = 100;; count+= 100) { 410 /* Try to fetch 'count' disks in one go. */ 411 bzero(&ccb, sizeof(ccb)); 412 413 ccb.ccb_h.func_code = XPT_DEV_MATCH; 414 415 bufsize = sizeof(struct dev_match_result) * (count + 1); 416 ccb.cdm.num_matches = 0; 417 ccb.cdm.match_buf_len = bufsize; 418 ccb.cdm.matches = calloc(1, bufsize); 419 420 bufsize = sizeof(struct dev_match_pattern) * 1; 421 ccb.cdm.num_patterns = 1; 422 ccb.cdm.pattern_buf_len = bufsize; 423 ccb.cdm.patterns = calloc(1, bufsize); 424 425 /* Match any "da" peripherals. */ 426 ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH; 427 p = &ccb.cdm.patterns[0].pattern.periph_pattern; 428 p->path_id = path_id; 429 snprintf(p->periph_name, sizeof(p->periph_name), "da"); 430 p->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_NAME; 431 432 if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) { 433 error = errno; 434 free(ccb.cdm.matches); 435 free(ccb.cdm.patterns); 436 return (error); 437 } 438 free(ccb.cdm.patterns); 439 440 /* Check for CCB errors. */ 441 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 442 free(ccb.cdm.matches); 443 return (EIO); 444 } 445 446 /* If we need a longer list, try again. */ 447 if (ccb.cdm.status == CAM_DEV_MATCH_MORE) { 448 free(ccb.cdm.matches); 449 continue; 450 } 451 452 /* If we got an error, abort. */ 453 if (ccb.cdm.status != CAM_DEV_MATCH_LAST) { 454 free(ccb.cdm.matches); 455 return (EIO); 456 } 457 break; 458 } 459 460 /* Shortcut if we don't have any "da" devices. */ 461 if (ccb.cdm.num_matches == 0) { 462 free(ccb.cdm.matches); 463 *ndisks = 0; 464 *disksp = NULL; 465 return (0); 466 } 467 468 /* We should have N matches, 1 for each "da" device. */ 469 for (i = 0; i < ccb.cdm.num_matches; i++) { 470 if (ccb.cdm.matches[i].type != DEV_MATCH_PERIPH) { 471 warnx("mpt_fetch_disks got wrong CAM matches"); 472 free(ccb.cdm.matches); 473 return (EIO); 474 } 475 } 476 477 /* 478 * Some of the "da" peripherals may be for RAID volumes, so 479 * fetch the IOC 2 page (list of RAID volumes) so we can 480 * exclude them from the list. 481 */ 482 ioc2 = mpt_read_ioc_page(fd, 2, NULL); 483 if (ioc2 == NULL) 484 return (errno); 485 disks = calloc(ccb.cdm.num_matches, sizeof(*disks)); 486 count = 0; 487 for (i = 0; i < ccb.cdm.num_matches; i++) { 488 r = &ccb.cdm.matches[i].result.periph_result; 489 if (periph_is_volume(ioc2, r)) 490 continue; 491 disks[count].bus = 0; 492 disks[count].target = r->target_id; 493 snprintf(disks[count].devname, sizeof(disks[count].devname), 494 "%s%d", r->periph_name, r->unit_number); 495 496 dev = cam_open_device(disks[count].devname, O_RDWR); 497 if (dev != NULL) { 498 fetch_scsi_capacity(dev, &disks[count]); 499 fetch_scsi_inquiry(dev, &disks[count]); 500 cam_close_device(dev); 501 } 502 count++; 503 } 504 free(ccb.cdm.matches); 505 free(ioc2); 506 507 *ndisks = count; 508 *disksp = disks; 509 return (0); 510 } 511 512 /* 513 * Instruct the mpt(4) device to rescan its buses to find new devices 514 * such as disks whose RAID physdisk page was removed or volumes that 515 * were created. If id is -1, the entire bus is rescanned. 516 * Otherwise, only devices at the specified ID are rescanned. If bus 517 * is -1, then all buses are scanned instead of the specified bus. 518 * Note that currently, only bus 0 is supported. 519 */ 520 int 521 mpt_rescan_bus(int bus, int id) 522 { 523 union ccb ccb; 524 path_id_t path_id; 525 int error; 526 527 /* mpt(4) only handles devices on bus 0. */ 528 if (bus != -1 && bus != 0) 529 return (EINVAL); 530 531 if (xpt_open() < 0) 532 return (ENXIO); 533 534 error = fetch_path_id(&path_id); 535 if (error) 536 return (error); 537 538 /* Perform the actual rescan. */ 539 bzero(&ccb, sizeof(ccb)); 540 ccb.ccb_h.path_id = path_id; 541 if (id == -1) { 542 ccb.ccb_h.func_code = XPT_SCAN_BUS; 543 ccb.ccb_h.target_id = CAM_TARGET_WILDCARD; 544 ccb.ccb_h.target_lun = CAM_LUN_WILDCARD; 545 ccb.ccb_h.timeout = 5000; 546 } else { 547 ccb.ccb_h.func_code = XPT_SCAN_LUN; 548 ccb.ccb_h.target_id = id; 549 ccb.ccb_h.target_lun = 0; 550 } 551 ccb.crcn.flags = CAM_FLAG_NONE; 552 553 /* Run this at a low priority. */ 554 ccb.ccb_h.pinfo.priority = 5; 555 556 if (ioctl(xptfd, CAMIOCOMMAND, &ccb) == -1) 557 return (errno); 558 559 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 560 warnx("mpt_rescan_bus rescan got CAM error %#x\n", 561 ccb.ccb_h.status & CAM_STATUS_MASK); 562 return (EIO); 563 } 564 565 return (0); 566 } 567