1 789 ahrens /* 2 789 ahrens * CDDL HEADER START 3 789 ahrens * 4 789 ahrens * The contents of this file are subject to the terms of the 5 1489 webaker * Common Development and Distribution License (the "License"). 6 1489 webaker * You may not use this file except in compliance with the License. 7 789 ahrens * 8 789 ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 789 ahrens * or http://www.opensolaris.org/os/licensing. 10 789 ahrens * See the License for the specific language governing permissions 11 789 ahrens * and limitations under the License. 12 789 ahrens * 13 789 ahrens * When distributing Covered Code, include this CDDL HEADER in each 14 789 ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 789 ahrens * If applicable, add the following below this CDDL HEADER, with the 16 789 ahrens * fields enclosed by brackets "[]" replaced with your own identifying 17 789 ahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18 789 ahrens * 19 789 ahrens * CDDL HEADER END 20 789 ahrens */ 21 789 ahrens /* 22 8876 Lin * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 789 ahrens * Use is subject to license terms. 24 789 ahrens */ 25 789 ahrens 26 789 ahrens #include <sys/zfs_context.h> 27 789 ahrens #include <sys/spa.h> 28 6423 gw25295 #include <sys/refcount.h> 29 789 ahrens #include <sys/vdev_disk.h> 30 789 ahrens #include <sys/vdev_impl.h> 31 789 ahrens #include <sys/fs/zfs.h> 32 789 ahrens #include <sys/zio.h> 33 1171 eschrock #include <sys/sunldi.h> 34 6976 eschrock #include <sys/fm/fs/zfs.h> 35 789 ahrens 36 789 ahrens /* 37 789 ahrens * Virtual device vector for disks. 38 789 ahrens */ 39 789 ahrens 40 789 ahrens extern ldi_ident_t zfs_li; 41 789 ahrens 42 789 ahrens typedef struct vdev_disk_buf { 43 789 ahrens buf_t vdb_buf; 44 789 ahrens zio_t *vdb_io; 45 789 ahrens } vdev_disk_buf_t; 46 789 ahrens 47 789 ahrens static int 48 7754 Jeff vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift) 49 789 ahrens { 50 8241 Jeff spa_t *spa = vd->vdev_spa; 51 789 ahrens vdev_disk_t *dvd; 52 7754 Jeff struct dk_minfo dkm; 53 7754 Jeff int error; 54 5329 gw25295 dev_t dev; 55 7754 Jeff int otyp; 56 789 ahrens 57 789 ahrens /* 58 789 ahrens * We must have a pathname, and it must be absolute. 59 789 ahrens */ 60 789 ahrens if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') { 61 789 ahrens vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL; 62 789 ahrens return (EINVAL); 63 789 ahrens } 64 789 ahrens 65 10850 George /* 66 10850 George * Reopen the device if it's not currently open. Otherwise, 67 10850 George * just update the physical size of the device. 68 10850 George */ 69 10850 George if (vd->vdev_tsd != NULL) { 70 10850 George ASSERT(vd->vdev_reopening); 71 10850 George dvd = vd->vdev_tsd; 72 10850 George goto skip_open; 73 10850 George } 74 10850 George 75 789 ahrens dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP); 76 789 ahrens 77 789 ahrens /* 78 789 ahrens * When opening a disk device, we want to preserve the user's original 79 789 ahrens * intent. We always want to open the device by the path the user gave 80 789 ahrens * us, even if it is one of multiple paths to the save device. But we 81 789 ahrens * also want to be able to survive disks being removed/recabled. 82 789 ahrens * Therefore the sequence of opening devices is: 83 789 ahrens * 84 1171 eschrock * 1. Try opening the device by path. For legacy pools without the 85 1171 eschrock * 'whole_disk' property, attempt to fix the path by appending 's0'. 86 789 ahrens * 87 789 ahrens * 2. If the devid of the device matches the stored value, return 88 789 ahrens * success. 89 789 ahrens * 90 789 ahrens * 3. Otherwise, the device may have moved. Try opening the device 91 789 ahrens * by the devid instead. 92 789 ahrens */ 93 789 ahrens if (vd->vdev_devid != NULL) { 94 789 ahrens if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid, 95 789 ahrens &dvd->vd_minor) != 0) { 96 789 ahrens vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL; 97 789 ahrens return (EINVAL); 98 789 ahrens } 99 789 ahrens } 100 789 ahrens 101 789 ahrens error = EINVAL; /* presume failure */ 102 789 ahrens 103 10850 George if (vd->vdev_path != NULL) { 104 789 ahrens ddi_devid_t devid; 105 789 ahrens 106 1171 eschrock if (vd->vdev_wholedisk == -1ULL) { 107 1171 eschrock size_t len = strlen(vd->vdev_path) + 3; 108 1171 eschrock char *buf = kmem_alloc(len, KM_SLEEP); 109 1171 eschrock ldi_handle_t lh; 110 789 ahrens 111 1171 eschrock (void) snprintf(buf, len, "%ss0", vd->vdev_path); 112 789 ahrens 113 8241 Jeff if (ldi_open_by_name(buf, spa_mode(spa), kcred, 114 1171 eschrock &lh, zfs_li) == 0) { 115 1171 eschrock spa_strfree(vd->vdev_path); 116 1171 eschrock vd->vdev_path = buf; 117 1171 eschrock vd->vdev_wholedisk = 1ULL; 118 8241 Jeff (void) ldi_close(lh, spa_mode(spa), kcred); 119 1171 eschrock } else { 120 1171 eschrock kmem_free(buf, len); 121 1171 eschrock } 122 1171 eschrock } 123 1171 eschrock 124 8241 Jeff error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred, 125 1171 eschrock &dvd->vd_lh, zfs_li); 126 789 ahrens 127 789 ahrens /* 128 789 ahrens * Compare the devid to the stored value. 129 789 ahrens */ 130 789 ahrens if (error == 0 && vd->vdev_devid != NULL && 131 789 ahrens ldi_get_devid(dvd->vd_lh, &devid) == 0) { 132 789 ahrens if (ddi_devid_compare(devid, dvd->vd_devid) != 0) { 133 789 ahrens error = EINVAL; 134 8241 Jeff (void) ldi_close(dvd->vd_lh, spa_mode(spa), 135 8241 Jeff kcred); 136 789 ahrens dvd->vd_lh = NULL; 137 789 ahrens } 138 789 ahrens ddi_devid_free(devid); 139 789 ahrens } 140 1171 eschrock 141 1171 eschrock /* 142 1171 eschrock * If we succeeded in opening the device, but 'vdev_wholedisk' 143 1171 eschrock * is not yet set, then this must be a slice. 144 1171 eschrock */ 145 1171 eschrock if (error == 0 && vd->vdev_wholedisk == -1ULL) 146 1171 eschrock vd->vdev_wholedisk = 0; 147 789 ahrens } 148 789 ahrens 149 789 ahrens /* 150 789 ahrens * If we were unable to open by path, or the devid check fails, open by 151 789 ahrens * devid instead. 152 789 ahrens */ 153 789 ahrens if (error != 0 && vd->vdev_devid != NULL) 154 789 ahrens error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor, 155 8241 Jeff spa_mode(spa), kcred, &dvd->vd_lh, zfs_li); 156 789 ahrens 157 4451 eschrock /* 158 4451 eschrock * If all else fails, then try opening by physical path (if available) 159 4451 eschrock * or the logical path (if we failed due to the devid check). While not 160 4451 eschrock * as reliable as the devid, this will give us something, and the higher 161 4451 eschrock * level vdev validation will prevent us from opening the wrong device. 162 4451 eschrock */ 163 4451 eschrock if (error) { 164 4451 eschrock if (vd->vdev_physpath != NULL && 165 8269 Mark (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV) 166 8241 Jeff error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa), 167 4451 eschrock kcred, &dvd->vd_lh, zfs_li); 168 4451 eschrock 169 4451 eschrock /* 170 4451 eschrock * Note that we don't support the legacy auto-wholedisk support 171 4451 eschrock * as above. This hasn't been used in a very long time and we 172 4451 eschrock * don't need to propagate its oddities to this edge condition. 173 4451 eschrock */ 174 10850 George if (error && vd->vdev_path != NULL) 175 8241 Jeff error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), 176 8241 Jeff kcred, &dvd->vd_lh, zfs_li); 177 4451 eschrock } 178 4451 eschrock 179 7754 Jeff if (error) { 180 789 ahrens vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; 181 7754 Jeff return (error); 182 7754 Jeff } 183 5329 gw25295 184 4451 eschrock /* 185 4451 eschrock * Once a device is opened, verify that the physical device path (if 186 4451 eschrock * available) is up to date. 187 4451 eschrock */ 188 4451 eschrock if (ldi_get_dev(dvd->vd_lh, &dev) == 0 && 189 4451 eschrock ldi_get_otyp(dvd->vd_lh, &otyp) == 0) { 190 5329 gw25295 char *physpath, *minorname; 191 5329 gw25295 192 4451 eschrock physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP); 193 4451 eschrock minorname = NULL; 194 4451 eschrock if (ddi_dev_pathname(dev, otyp, physpath) == 0 && 195 4451 eschrock ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 && 196 4451 eschrock (vd->vdev_physpath == NULL || 197 4451 eschrock strcmp(vd->vdev_physpath, physpath) != 0)) { 198 4451 eschrock if (vd->vdev_physpath) 199 4451 eschrock spa_strfree(vd->vdev_physpath); 200 4451 eschrock (void) strlcat(physpath, ":", MAXPATHLEN); 201 4451 eschrock (void) strlcat(physpath, minorname, MAXPATHLEN); 202 4451 eschrock vd->vdev_physpath = spa_strdup(physpath); 203 4451 eschrock } 204 4451 eschrock if (minorname) 205 4451 eschrock kmem_free(minorname, strlen(minorname) + 1); 206 4451 eschrock kmem_free(physpath, MAXPATHLEN); 207 789 ahrens } 208 789 ahrens 209 10850 George skip_open: 210 789 ahrens /* 211 789 ahrens * Determine the actual size of the device. 212 789 ahrens */ 213 789 ahrens if (ldi_get_size(dvd->vd_lh, psize) != 0) { 214 789 ahrens vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED; 215 789 ahrens return (EINVAL); 216 789 ahrens } 217 789 ahrens 218 1732 bonwick /* 219 1732 bonwick * If we own the whole disk, try to enable disk write caching. 220 1732 bonwick * We ignore errors because it's OK if we can't do it. 221 1732 bonwick */ 222 1732 bonwick if (vd->vdev_wholedisk == 1) { 223 1732 bonwick int wce = 1; 224 1732 bonwick (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce, 225 1732 bonwick FKIOCTL, kcred, NULL); 226 1732 bonwick } 227 1489 webaker 228 1732 bonwick /* 229 1732 bonwick * Determine the device's minimum transfer size. 230 1732 bonwick * If the ioctl isn't supported, assume DEV_BSIZE. 231 1732 bonwick */ 232 1732 bonwick if (ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO, (intptr_t)&dkm, 233 1732 bonwick FKIOCTL, kcred, NULL) != 0) 234 1732 bonwick dkm.dki_lbsize = DEV_BSIZE; 235 1489 webaker 236 1732 bonwick *ashift = highbit(MAX(dkm.dki_lbsize, SPA_MINBLOCKSIZE)) - 1; 237 789 ahrens 238 1773 eschrock /* 239 1773 eschrock * Clear the nowritecache bit, so that on a vdev_reopen() we will 240 1773 eschrock * try again. 241 1773 eschrock */ 242 1773 eschrock vd->vdev_nowritecache = B_FALSE; 243 1773 eschrock 244 789 ahrens return (0); 245 789 ahrens } 246 789 ahrens 247 789 ahrens static void 248 789 ahrens vdev_disk_close(vdev_t *vd) 249 789 ahrens { 250 789 ahrens vdev_disk_t *dvd = vd->vdev_tsd; 251 789 ahrens 252 10850 George if (vd->vdev_reopening || dvd == NULL) 253 789 ahrens return; 254 789 ahrens 255 789 ahrens if (dvd->vd_minor != NULL) 256 789 ahrens ddi_devid_str_free(dvd->vd_minor); 257 789 ahrens 258 789 ahrens if (dvd->vd_devid != NULL) 259 789 ahrens ddi_devid_free(dvd->vd_devid); 260 789 ahrens 261 789 ahrens if (dvd->vd_lh != NULL) 262 8241 Jeff (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred); 263 789 ahrens 264 789 ahrens kmem_free(dvd, sizeof (vdev_disk_t)); 265 789 ahrens vd->vdev_tsd = NULL; 266 789 ahrens } 267 789 ahrens 268 6423 gw25295 int 269 6423 gw25295 vdev_disk_physio(ldi_handle_t vd_lh, caddr_t data, size_t size, 270 6423 gw25295 uint64_t offset, int flags) 271 6423 gw25295 { 272 6423 gw25295 buf_t *bp; 273 6423 gw25295 int error = 0; 274 6423 gw25295 275 6423 gw25295 if (vd_lh == NULL) 276 6423 gw25295 return (EINVAL); 277 6423 gw25295 278 6423 gw25295 ASSERT(flags & B_READ || flags & B_WRITE); 279 6423 gw25295 280 6423 gw25295 bp = getrbuf(KM_SLEEP); 281 6423 gw25295 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST; 282 6423 gw25295 bp->b_bcount = size; 283 6423 gw25295 bp->b_un.b_addr = (void *)data; 284 6423 gw25295 bp->b_lblkno = lbtodb(offset); 285 6423 gw25295 bp->b_bufsize = size; 286 6423 gw25295 287 6423 gw25295 error = ldi_strategy(vd_lh, bp); 288 6423 gw25295 ASSERT(error == 0); 289 6423 gw25295 if ((error = biowait(bp)) == 0 && bp->b_resid != 0) 290 6423 gw25295 error = EIO; 291 6423 gw25295 freerbuf(bp); 292 6423 gw25295 293 6423 gw25295 return (error); 294 6423 gw25295 } 295 6423 gw25295 296 789 ahrens static void 297 789 ahrens vdev_disk_io_intr(buf_t *bp) 298 789 ahrens { 299 789 ahrens vdev_disk_buf_t *vdb = (vdev_disk_buf_t *)bp; 300 789 ahrens zio_t *zio = vdb->vdb_io; 301 789 ahrens 302 6976 eschrock /* 303 6976 eschrock * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO. 304 6976 eschrock * Rather than teach the rest of the stack about other error 305 6976 eschrock * possibilities (EFAULT, etc), we normalize the error value here. 306 6976 eschrock */ 307 6976 eschrock zio->io_error = (geterror(bp) != 0 ? EIO : 0); 308 6976 eschrock 309 6976 eschrock if (zio->io_error == 0 && bp->b_resid != 0) 310 789 ahrens zio->io_error = EIO; 311 789 ahrens 312 789 ahrens kmem_free(vdb, sizeof (vdev_disk_buf_t)); 313 789 ahrens 314 5530 bonwick zio_interrupt(zio); 315 789 ahrens } 316 789 ahrens 317 789 ahrens static void 318 7762 Jeff vdev_disk_ioctl_free(zio_t *zio) 319 7762 Jeff { 320 7762 Jeff kmem_free(zio->io_vsd, sizeof (struct dk_callback)); 321 7762 Jeff } 322 7762 Jeff 323 10614 Jonathan static const zio_vsd_ops_t vdev_disk_vsd_ops = { 324 10614 Jonathan vdev_disk_ioctl_free, 325 10614 Jonathan zio_vsd_default_cksum_report 326 10614 Jonathan }; 327 10614 Jonathan 328 7762 Jeff static void 329 789 ahrens vdev_disk_ioctl_done(void *zio_arg, int error) 330 789 ahrens { 331 789 ahrens zio_t *zio = zio_arg; 332 789 ahrens 333 789 ahrens zio->io_error = error; 334 789 ahrens 335 5530 bonwick zio_interrupt(zio); 336 789 ahrens } 337 789 ahrens 338 5530 bonwick static int 339 789 ahrens vdev_disk_io_start(zio_t *zio) 340 789 ahrens { 341 789 ahrens vdev_t *vd = zio->io_vd; 342 789 ahrens vdev_disk_t *dvd = vd->vdev_tsd; 343 789 ahrens vdev_disk_buf_t *vdb; 344 7754 Jeff struct dk_callback *dkc; 345 789 ahrens buf_t *bp; 346 7754 Jeff int error; 347 789 ahrens 348 789 ahrens if (zio->io_type == ZIO_TYPE_IOCTL) { 349 789 ahrens /* XXPOLICY */ 350 5329 gw25295 if (!vdev_readable(vd)) { 351 789 ahrens zio->io_error = ENXIO; 352 5530 bonwick return (ZIO_PIPELINE_CONTINUE); 353 789 ahrens } 354 789 ahrens 355 789 ahrens switch (zio->io_cmd) { 356 789 ahrens 357 789 ahrens case DKIOCFLUSHWRITECACHE: 358 789 ahrens 359 2885 ahrens if (zfs_nocacheflush) 360 2885 ahrens break; 361 2885 ahrens 362 1773 eschrock if (vd->vdev_nowritecache) { 363 1773 eschrock zio->io_error = ENOTSUP; 364 1773 eschrock break; 365 1773 eschrock } 366 1773 eschrock 367 7754 Jeff zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP); 368 10614 Jonathan zio->io_vsd_ops = &vdev_disk_vsd_ops; 369 7754 Jeff 370 7754 Jeff dkc->dkc_callback = vdev_disk_ioctl_done; 371 7754 Jeff dkc->dkc_flag = FLUSH_VOLATILE; 372 7754 Jeff dkc->dkc_cookie = zio; 373 789 ahrens 374 789 ahrens error = ldi_ioctl(dvd->vd_lh, zio->io_cmd, 375 7754 Jeff (uintptr_t)dkc, FKIOCTL, kcred, NULL); 376 789 ahrens 377 789 ahrens if (error == 0) { 378 789 ahrens /* 379 789 ahrens * The ioctl will be done asychronously, 380 789 ahrens * and will call vdev_disk_ioctl_done() 381 789 ahrens * upon completion. 382 789 ahrens */ 383 5530 bonwick return (ZIO_PIPELINE_STOP); 384 5530 bonwick } 385 5530 bonwick 386 5530 bonwick if (error == ENOTSUP || error == ENOTTY) { 387 1773 eschrock /* 388 4455 mishra * If we get ENOTSUP or ENOTTY, we know that 389 4455 mishra * no future attempts will ever succeed. 390 4455 mishra * In this case we set a persistent bit so 391 4455 mishra * that we don't bother with the ioctl in the 392 4455 mishra * future. 393 1773 eschrock */ 394 1773 eschrock vd->vdev_nowritecache = B_TRUE; 395 789 ahrens } 396 789 ahrens zio->io_error = error; 397 1773 eschrock 398 789 ahrens break; 399 789 ahrens 400 789 ahrens default: 401 789 ahrens zio->io_error = ENOTSUP; 402 789 ahrens } 403 789 ahrens 404 5530 bonwick return (ZIO_PIPELINE_CONTINUE); 405 789 ahrens } 406 789 ahrens 407 789 ahrens vdb = kmem_alloc(sizeof (vdev_disk_buf_t), KM_SLEEP); 408 789 ahrens 409 789 ahrens vdb->vdb_io = zio; 410 789 ahrens bp = &vdb->vdb_buf; 411 789 ahrens 412 789 ahrens bioinit(bp); 413 7754 Jeff bp->b_flags = B_BUSY | B_NOCACHE | 414 9725 Eric (zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE); 415 9725 Eric if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD))) 416 9725 Eric bp->b_flags |= B_FAILFAST; 417 789 ahrens bp->b_bcount = zio->io_size; 418 789 ahrens bp->b_un.b_addr = zio->io_data; 419 789 ahrens bp->b_lblkno = lbtodb(zio->io_offset); 420 789 ahrens bp->b_bufsize = zio->io_size; 421 789 ahrens bp->b_iodone = (int (*)())vdev_disk_io_intr; 422 789 ahrens 423 789 ahrens /* ldi_strategy() will return non-zero only on programming errors */ 424 7754 Jeff VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0); 425 5530 bonwick 426 5530 bonwick return (ZIO_PIPELINE_STOP); 427 789 ahrens } 428 789 ahrens 429 7754 Jeff static void 430 789 ahrens vdev_disk_io_done(zio_t *zio) 431 789 ahrens { 432 7754 Jeff vdev_t *vd = zio->io_vd; 433 4451 eschrock 434 4451 eschrock /* 435 4451 eschrock * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if 436 4451 eschrock * the device has been removed. If this is the case, then we trigger an 437 5329 gw25295 * asynchronous removal of the device. Otherwise, probe the device and 438 5369 gw25295 * make sure it's still accessible. 439 4451 eschrock */ 440 10575 Eric if (zio->io_error == EIO && !vd->vdev_remove_wanted) { 441 5329 gw25295 vdev_disk_t *dvd = vd->vdev_tsd; 442 7754 Jeff int state = DKIO_NONE; 443 5329 gw25295 444 7754 Jeff if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state, 445 7754 Jeff FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) { 446 10575 Eric /* 447 10575 Eric * We post the resource as soon as possible, instead of 448 10575 Eric * when the async removal actually happens, because the 449 10575 Eric * DE is using this information to discard previous I/O 450 10575 Eric * errors. 451 10575 Eric */ 452 10575 Eric zfs_post_remove(zio->io_spa, vd); 453 4451 eschrock vd->vdev_remove_wanted = B_TRUE; 454 4451 eschrock spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE); 455 4451 eschrock } 456 4451 eschrock } 457 789 ahrens } 458 789 ahrens 459 789 ahrens vdev_ops_t vdev_disk_ops = { 460 789 ahrens vdev_disk_open, 461 789 ahrens vdev_disk_close, 462 789 ahrens vdev_default_asize, 463 789 ahrens vdev_disk_io_start, 464 789 ahrens vdev_disk_io_done, 465 789 ahrens NULL, 466 789 ahrens VDEV_TYPE_DISK, /* name of this vdev type */ 467 789 ahrens B_TRUE /* leaf vdev */ 468 789 ahrens }; 469 6423 gw25295 470 6423 gw25295 /* 471 7147 taylor * Given the root disk device devid or pathname, read the label from 472 7147 taylor * the device, and construct a configuration nvlist. 473 6423 gw25295 */ 474 7539 Lin int 475 7539 Lin vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config) 476 6423 gw25295 { 477 6423 gw25295 ldi_handle_t vd_lh; 478 6423 gw25295 vdev_label_t *label; 479 6423 gw25295 uint64_t s, size; 480 6423 gw25295 int l; 481 7147 taylor ddi_devid_t tmpdevid; 482 7687 Lin int error = -1; 483 7147 taylor char *minor_name; 484 6423 gw25295 485 6423 gw25295 /* 486 6423 gw25295 * Read the device label and build the nvlist. 487 6423 gw25295 */ 488 7687 Lin if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid, 489 7147 taylor &minor_name) == 0) { 490 7147 taylor error = ldi_open_by_devid(tmpdevid, minor_name, 491 8241 Jeff FREAD, kcred, &vd_lh, zfs_li); 492 7147 taylor ddi_devid_free(tmpdevid); 493 7147 taylor ddi_devid_str_free(minor_name); 494 7147 taylor } 495 7147 taylor 496 7687 Lin if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh, 497 7687 Lin zfs_li))) 498 7539 Lin return (error); 499 6423 gw25295 500 6673 eschrock if (ldi_get_size(vd_lh, &s)) { 501 6673 eschrock (void) ldi_close(vd_lh, FREAD, kcred); 502 7539 Lin return (EIO); 503 6673 eschrock } 504 6423 gw25295 505 6423 gw25295 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t); 506 6423 gw25295 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP); 507 6423 gw25295 508 9616 Eric *config = NULL; 509 6423 gw25295 for (l = 0; l < VDEV_LABELS; l++) { 510 6423 gw25295 uint64_t offset, state, txg = 0; 511 6423 gw25295 512 6423 gw25295 /* read vdev label */ 513 6423 gw25295 offset = vdev_label_offset(size, l, 0); 514 6423 gw25295 if (vdev_disk_physio(vd_lh, (caddr_t)label, 515 8876 Lin VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0) 516 6423 gw25295 continue; 517 6423 gw25295 518 6423 gw25295 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist, 519 7539 Lin sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) { 520 7539 Lin *config = NULL; 521 6423 gw25295 continue; 522 6423 gw25295 } 523 6423 gw25295 524 7539 Lin if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, 525 6423 gw25295 &state) != 0 || state >= POOL_STATE_DESTROYED) { 526 7539 Lin nvlist_free(*config); 527 7539 Lin *config = NULL; 528 6423 gw25295 continue; 529 6423 gw25295 } 530 6423 gw25295 531 7539 Lin if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, 532 6423 gw25295 &txg) != 0 || txg == 0) { 533 7539 Lin nvlist_free(*config); 534 7539 Lin *config = NULL; 535 6423 gw25295 continue; 536 6423 gw25295 } 537 6423 gw25295 538 6423 gw25295 break; 539 6423 gw25295 } 540 6423 gw25295 541 6423 gw25295 kmem_free(label, sizeof (vdev_label_t)); 542 6673 eschrock (void) ldi_close(vd_lh, FREAD, kcred); 543 9616 Eric if (*config == NULL) 544 9616 Eric error = EIDRM; 545 6673 eschrock 546 7539 Lin return (error); 547 6423 gw25295 } 548
Indexes created Sat Nov 28 12:39:51 UTC 2009
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