cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
  25  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  26  * Copyright 2016 Nexenta Systems, Inc.
  27  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <ctype.h>
  33 #include <errno.h>
  34 #include <devid.h>
  35 #include <fcntl.h>
  36 #include <libintl.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <strings.h>
  40 #include <unistd.h>
  41 #include <libgen.h>
  42 #include <sys/zfs_ioctl.h>
  43 #include <dlfcn.h>
  44
  45 #include "zfs_namecheck.h"
  46 #include "zfs_prop.h"
  47 #include "libzfs_impl.h"
  48 #include "zfs_comutil.h"
  49 #include "zfeature_common.h"
  50
  51 static int read_efi_label(nvlist_t *config, diskaddr_t *sb);
  52
  53 #define BACKUP_SLICE    "s2"
  54
  55 typedef struct prop_flags {
  56         int create:1;   /* Validate property on creation */
  57         int import:1;   /* Validate property on import */
  58 } prop_flags_t;
  59
  60 /*
  61  * ====================================================================
  62  *   zpool property functions
  63  * ====================================================================
  64  */
  65
  66 static int
  67 zpool_get_all_props(zpool_handle_t *zhp)
  68 {
  69         zfs_cmd_t zc = { 0 };
  70         libzfs_handle_t *hdl = zhp->zpool_hdl;
  71
  72         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
  73
  74         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
  75                 return (-1);
  76
  77         while (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_PROPS, &zc) != 0) {
  78                 if (errno == ENOMEM) {
  79                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
  80                                 zcmd_free_nvlists(&zc);
  81                                 return (-1);
  82                         }
  83                 } else {
  84                         zcmd_free_nvlists(&zc);
  85                         return (-1);
  86                 }
  87         }
  88
  89         if (zcmd_read_dst_nvlist(hdl, &zc, &zhp->zpool_props) != 0) {
  90                 zcmd_free_nvlists(&zc);
  91                 return (-1);
  92         }
  93
  94         zcmd_free_nvlists(&zc);
  95
  96         return (0);
  97 }
  98
  99 static int
 100 zpool_props_refresh(zpool_handle_t *zhp)
 101 {
 102         nvlist_t *old_props;
 103
 104         old_props = zhp->zpool_props;
 105
 106         if (zpool_get_all_props(zhp) != 0)
 107                 return (-1);
 108
 109         nvlist_free(old_props);
 110         return (0);
 111 }
 112
 113 static char *
 114 zpool_get_prop_string(zpool_handle_t *zhp, zpool_prop_t prop,
 115     zprop_source_t *src)
 116 {
 117         nvlist_t *nv, *nvl;
 118         uint64_t ival;
 119         char *value;
 120         zprop_source_t source;
 121
 122         nvl = zhp->zpool_props;
 123         if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) {
 124                 verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &ival) == 0);
 125                 source = ival;
 126                 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
 127         } else {
 128                 source = ZPROP_SRC_DEFAULT;
 129                 if ((value = (char *)zpool_prop_default_string(prop)) == NULL)
 130                         value = "-";
 131         }
 132
 133         if (src)
 134                 *src = source;
 135
 136         return (value);
 137 }
 138
 139 uint64_t
 140 zpool_get_prop_int(zpool_handle_t *zhp, zpool_prop_t prop, zprop_source_t *src)
 141 {
 142         nvlist_t *nv, *nvl;
 143         uint64_t value;
 144         zprop_source_t source;
 145
 146         if (zhp->zpool_props == NULL && zpool_get_all_props(zhp)) {
 147                 /*
 148                  * zpool_get_all_props() has most likely failed because
 149                  * the pool is faulted, but if all we need is the top level
 150                  * vdev's guid then get it from the zhp config nvlist.
 151                  */
 152                 if ((prop == ZPOOL_PROP_GUID) &&
 153                     (nvlist_lookup_nvlist(zhp->zpool_config,
 154                     ZPOOL_CONFIG_VDEV_TREE, &nv) == 0) &&
 155                     (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &value)
 156                     == 0)) {
 157                         return (value);
 158                 }
 159                 return (zpool_prop_default_numeric(prop));
 160         }
 161
 162         nvl = zhp->zpool_props;
 163         if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) {
 164                 verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &value) == 0);
 165                 source = value;
 166                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
 167         } else {
 168                 source = ZPROP_SRC_DEFAULT;
 169                 value = zpool_prop_default_numeric(prop);
 170         }
 171
 172         if (src)
 173                 *src = source;
 174
 175         return (value);
 176 }
 177
 178 /*
 179  * Map VDEV STATE to printed strings.
 180  */
 181 const char *
 182 zpool_state_to_name(vdev_state_t state, vdev_aux_t aux)
 183 {
 184         switch (state) {
 185         case VDEV_STATE_CLOSED:
 186         case VDEV_STATE_OFFLINE:
 187                 return (gettext("OFFLINE"));
 188         case VDEV_STATE_REMOVED:
 189                 return (gettext("REMOVED"));
 190         case VDEV_STATE_CANT_OPEN:
 191                 if (aux == VDEV_AUX_CORRUPT_DATA || aux == VDEV_AUX_BAD_LOG)
 192                         return (gettext("FAULTED"));
 193                 else if (aux == VDEV_AUX_SPLIT_POOL)
 194                         return (gettext("SPLIT"));
 195                 else
 196                         return (gettext("UNAVAIL"));
 197         case VDEV_STATE_FAULTED:
 198                 return (gettext("FAULTED"));
 199         case VDEV_STATE_DEGRADED:
 200                 return (gettext("DEGRADED"));
 201         case VDEV_STATE_HEALTHY:
 202                 return (gettext("ONLINE"));
 203
 204         default:
 205                 break;
 206         }
 207
 208         return (gettext("UNKNOWN"));
 209 }
 210
 211 /*
 212  * Map POOL STATE to printed strings.
 213  */
 214 const char *
 215 zpool_pool_state_to_name(pool_state_t state)
 216 {
 217         switch (state) {
 218         case POOL_STATE_ACTIVE:
 219                 return (gettext("ACTIVE"));
 220         case POOL_STATE_EXPORTED:
 221                 return (gettext("EXPORTED"));
 222         case POOL_STATE_DESTROYED:
 223                 return (gettext("DESTROYED"));
 224         case POOL_STATE_SPARE:
 225                 return (gettext("SPARE"));
 226         case POOL_STATE_L2CACHE:
 227                 return (gettext("L2CACHE"));
 228         case POOL_STATE_UNINITIALIZED:
 229                 return (gettext("UNINITIALIZED"));
 230         case POOL_STATE_UNAVAIL:
 231                 return (gettext("UNAVAIL"));
 232         case POOL_STATE_POTENTIALLY_ACTIVE:
 233                 return (gettext("POTENTIALLY_ACTIVE"));
 234         }
 235
 236         return (gettext("UNKNOWN"));
 237 }
 238
 239 /*
 240  * Get a zpool property value for 'prop' and return the value in
 241  * a pre-allocated buffer.
 242  */
 243 int
 244 zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
 245     zprop_source_t *srctype, boolean_t literal)
 246 {
 247         uint64_t intval;
 248         const char *strval;
 249         zprop_source_t src = ZPROP_SRC_NONE;
 250         nvlist_t *nvroot;
 251         vdev_stat_t *vs;
 252         uint_t vsc;
 253
 254         if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
 255                 switch (prop) {
 256                 case ZPOOL_PROP_NAME:
 257                         (void) strlcpy(buf, zpool_get_name(zhp), len);
 258                         break;
 259
 260                 case ZPOOL_PROP_HEALTH:
 261                         (void) strlcpy(buf,
 262                             zpool_pool_state_to_name(POOL_STATE_UNAVAIL), len);
 263                         break;
 264
 265                 case ZPOOL_PROP_GUID:
 266                         intval = zpool_get_prop_int(zhp, prop, &src);
 267                         (void) snprintf(buf, len, "%llu", intval);
 268                         break;
 269
 270                 case ZPOOL_PROP_ALTROOT:
 271                 case ZPOOL_PROP_CACHEFILE:
 272                 case ZPOOL_PROP_COMMENT:
 273                         if (zhp->zpool_props != NULL ||
 274                             zpool_get_all_props(zhp) == 0) {
 275                                 (void) strlcpy(buf,
 276                                     zpool_get_prop_string(zhp, prop, &src),
 277                                     len);
 278                                 break;
 279                         }
 280                         /* FALLTHROUGH */
 281                 default:
 282                         (void) strlcpy(buf, "-", len);
 283                         break;
 284                 }
 285
 286                 if (srctype != NULL)
 287                         *srctype = src;
 288                 return (0);
 289         }
 290
 291         if (zhp->zpool_props == NULL && zpool_get_all_props(zhp) &&
 292             prop != ZPOOL_PROP_NAME)
 293                 return (-1);
 294
 295         switch (zpool_prop_get_type(prop)) {
 296         case PROP_TYPE_STRING:
 297                 (void) strlcpy(buf, zpool_get_prop_string(zhp, prop, &src),
 298                     len);
 299                 break;
 300
 301         case PROP_TYPE_NUMBER:
 302                 intval = zpool_get_prop_int(zhp, prop, &src);
 303
 304                 switch (prop) {
 305                 case ZPOOL_PROP_SIZE:
 306                 case ZPOOL_PROP_ALLOCATED:
 307                 case ZPOOL_PROP_FREE:
 308                 case ZPOOL_PROP_FREEING:
 309                 case ZPOOL_PROP_LEAKED:
 310                         if (literal) {
 311                                 (void) snprintf(buf, len, "%llu",
 312                                     (u_longlong_t)intval);
 313                         } else {
 314                                 (void) zfs_nicenum(intval, buf, len);
 315                         }
 316                         break;
 317                 case ZPOOL_PROP_EXPANDSZ:
 318                         if (intval == 0) {
 319                                 (void) strlcpy(buf, "-", len);
 320                         } else if (literal) {
 321                                 (void) snprintf(buf, len, "%llu",
 322                                     (u_longlong_t)intval);
 323                         } else {
 324                                 (void) zfs_nicenum(intval, buf, len);
 325                         }
 326                         break;
 327                 case ZPOOL_PROP_CAPACITY:
 328                         if (literal) {
 329                                 (void) snprintf(buf, len, "%llu",
 330                                     (u_longlong_t)intval);
 331                         } else {
 332                                 (void) snprintf(buf, len, "%llu%%",
 333                                     (u_longlong_t)intval);
 334                         }
 335                         break;
 336                 case ZPOOL_PROP_FRAGMENTATION:
 337                         if (intval == UINT64_MAX) {
 338                                 (void) strlcpy(buf, "-", len);
 339                         } else {
 340                                 (void) snprintf(buf, len, "%llu%%",
 341                                     (u_longlong_t)intval);
 342                         }
 343                         break;
 344                 case ZPOOL_PROP_DEDUPRATIO:
 345                         (void) snprintf(buf, len, "%llu.%02llux",
 346                             (u_longlong_t)(intval / 100),
 347                             (u_longlong_t)(intval % 100));
 348                         break;
 349                 case ZPOOL_PROP_HEALTH:
 350                         verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
 351                             ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
 352                         verify(nvlist_lookup_uint64_array(nvroot,
 353                             ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
 354                             == 0);
 355
 356                         (void) strlcpy(buf, zpool_state_to_name(intval,
 357                             vs->vs_aux), len);
 358                         break;
 359                 case ZPOOL_PROP_VERSION:
 360                         if (intval >= SPA_VERSION_FEATURES) {
 361                                 (void) snprintf(buf, len, "-");
 362                                 break;
 363                         }
 364                         /* FALLTHROUGH */
 365                 default:
 366                         (void) snprintf(buf, len, "%llu", intval);
 367                 }
 368                 break;
 369
 370         case PROP_TYPE_INDEX:
 371                 intval = zpool_get_prop_int(zhp, prop, &src);
 372                 if (zpool_prop_index_to_string(prop, intval, &strval)
 373                     != 0)
 374                         return (-1);
 375                 (void) strlcpy(buf, strval, len);
 376                 break;
 377
 378         default:
 379                 abort();
 380         }
 381
 382         if (srctype)
 383                 *srctype = src;
 384
 385         return (0);
 386 }
 387
 388 /*
 389  * Check if the bootfs name has the same pool name as it is set to.
 390  * Assuming bootfs is a valid dataset name.
 391  */
 392 static boolean_t
 393 bootfs_name_valid(const char *pool, char *bootfs)
 394 {
 395         int len = strlen(pool);
 396
 397         if (!zfs_name_valid(bootfs, ZFS_TYPE_FILESYSTEM|ZFS_TYPE_SNAPSHOT))
 398                 return (B_FALSE);
 399
 400         if (strncmp(pool, bootfs, len) == 0 &&
 401             (bootfs[len] == '/' || bootfs[len] == '\0'))
 402                 return (B_TRUE);
 403
 404         return (B_FALSE);
 405 }
 406
 407 boolean_t
 408 zpool_is_bootable(zpool_handle_t *zhp)
 409 {
 410         char bootfs[ZPOOL_MAXNAMELEN];
 411
 412         return (zpool_get_prop(zhp, ZPOOL_PROP_BOOTFS, bootfs,
 413             sizeof (bootfs), NULL, B_FALSE) == 0 && strncmp(bootfs, "-",
 414             sizeof (bootfs)) != 0);
 415 }
 416
 417
 418 /*
 419  * Given an nvlist of zpool properties to be set, validate that they are
 420  * correct, and parse any numeric properties (index, boolean, etc) if they are
 421  * specified as strings.
 422  */
 423 static nvlist_t *
 424 zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname,
 425     nvlist_t *props, uint64_t version, prop_flags_t flags, char *errbuf)
 426 {
 427         nvpair_t *elem;
 428         nvlist_t *retprops;
 429         zpool_prop_t prop;
 430         char *strval;
 431         uint64_t intval;
 432         char *slash, *check;
 433         struct stat64 statbuf;
 434         zpool_handle_t *zhp;
 435
 436         if (nvlist_alloc(&retprops, NV_UNIQUE_NAME, 0) != 0) {
 437                 (void) no_memory(hdl);
 438                 return (NULL);
 439         }
 440
 441         elem = NULL;
 442         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 443                 const char *propname = nvpair_name(elem);
 444
 445                 prop = zpool_name_to_prop(propname);
 446                 if (prop == ZPROP_INVAL && zpool_prop_feature(propname)) {
 447                         int err;
 448                         char *fname = strchr(propname, '@') + 1;
 449
 450                         err = zfeature_lookup_name(fname, NULL);
 451                         if (err != 0) {
 452                                 ASSERT3U(err, ==, ENOENT);
 453                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 454                                     "invalid feature '%s'"), fname);
 455                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 456                                 goto error;
 457                         }
 458
 459                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 460                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 461                                     "'%s' must be a string"), propname);
 462                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 463                                 goto error;
 464                         }
 465
 466                         (void) nvpair_value_string(elem, &strval);
 467                         if (strcmp(strval, ZFS_FEATURE_ENABLED) != 0) {
 468                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 469                                     "property '%s' can only be set to "
 470                                     "'enabled'"), propname);
 471                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 472                                 goto error;
 473                         }
 474
 475                         if (nvlist_add_uint64(retprops, propname, 0) != 0) {
 476                                 (void) no_memory(hdl);
 477                                 goto error;
 478                         }
 479                         continue;
 480                 }
 481
 482                 /*
 483                  * Make sure this property is valid and applies to this type.
 484                  */
 485                 if (prop == ZPROP_INVAL) {
 486                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 487                             "invalid property '%s'"), propname);
 488                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 489                         goto error;
 490                 }
 491
 492                 if (zpool_prop_readonly(prop)) {
 493                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' "
 494                             "is readonly"), propname);
 495                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
 496                         goto error;
 497                 }
 498
 499                 if (zprop_parse_value(hdl, elem, prop, ZFS_TYPE_POOL, retprops,
 500                     &strval, &intval, errbuf) != 0)
 501                         goto error;
 502
 503                 /*
 504                  * Perform additional checking for specific properties.
 505                  */
 506                 switch (prop) {
 507                 case ZPOOL_PROP_VERSION:
 508                         if (intval < version ||
 509                             !SPA_VERSION_IS_SUPPORTED(intval)) {
 510                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 511                                     "property '%s' number %d is invalid."),
 512                                     propname, intval);
 513                                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
 514                                 goto error;
 515                         }
 516                         break;
 517
 518                 case ZPOOL_PROP_BOOTFS:
 519                         if (flags.create || flags.import) {
 520                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 521                                     "property '%s' cannot be set at creation "
 522                                     "or import time"), propname);
 523                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 524                                 goto error;
 525                         }
 526
 527                         if (version < SPA_VERSION_BOOTFS) {
 528                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 529                                     "pool must be upgraded to support "
 530                                     "'%s' property"), propname);
 531                                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
 532                                 goto error;
 533                         }
 534
 535                         /*
 536                          * bootfs property value has to be a dataset name and
 537                          * the dataset has to be in the same pool as it sets to.
 538                          */
 539                         if (strval[0] != '\0' && !bootfs_name_valid(poolname,
 540                             strval)) {
 541                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' "
 542                                     "is an invalid name"), strval);
 543                                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 544                                 goto error;
 545                         }
 546
 547                         if ((zhp = zpool_open_canfail(hdl, poolname)) == NULL) {
 548                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 549                                     "could not open pool '%s'"), poolname);
 550                                 (void) zfs_error(hdl, EZFS_OPENFAILED, errbuf);
 551                                 goto error;
 552                         }
 553                         zpool_close(zhp);
 554                         break;
 555
 556                 case ZPOOL_PROP_ALTROOT:
 557                         if (!flags.create && !flags.import) {
 558                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 559                                     "property '%s' can only be set during pool "
 560                                     "creation or import"), propname);
 561                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 562                                 goto error;
 563                         }
 564
 565                         if (strval[0] != '/') {
 566                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 567                                     "bad alternate root '%s'"), strval);
 568                                 (void) zfs_error(hdl, EZFS_BADPATH, errbuf);
 569                                 goto error;
 570                         }
 571                         break;
 572
 573                 case ZPOOL_PROP_CACHEFILE:
 574                         if (strval[0] == '\0')
 575                                 break;
 576
 577                         if (strcmp(strval, "none") == 0)
 578                                 break;
 579
 580                         if (strval[0] != '/') {
 581                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 582                                     "property '%s' must be empty, an "
 583                                     "absolute path, or 'none'"), propname);
 584                                 (void) zfs_error(hdl, EZFS_BADPATH, errbuf);
 585                                 goto error;
 586                         }
 587
 588                         slash = strrchr(strval, '/');
 589
 590                         if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
 591                             strcmp(slash, "/..") == 0) {
 592                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 593                                     "'%s' is not a valid file"), strval);
 594                                 (void) zfs_error(hdl, EZFS_BADPATH, errbuf);
 595                                 goto error;
 596                         }
 597
 598                         *slash = '\0';
 599
 600                         if (strval[0] != '\0' &&
 601                             (stat64(strval, &statbuf) != 0 ||
 602                             !S_ISDIR(statbuf.st_mode))) {
 603                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 604                                     "'%s' is not a valid directory"),
 605                                     strval);
 606                                 (void) zfs_error(hdl, EZFS_BADPATH, errbuf);
 607                                 goto error;
 608                         }
 609
 610                         *slash = '/';
 611                         break;
 612
 613                 case ZPOOL_PROP_COMMENT:
 614                         for (check = strval; *check != '\0'; check++) {
 615                                 if (!isprint(*check)) {
 616                                         zfs_error_aux(hdl,
 617                                             dgettext(TEXT_DOMAIN,
 618                                             "comment may only have printable "
 619                                             "characters"));
 620                                         (void) zfs_error(hdl, EZFS_BADPROP,
 621                                             errbuf);
 622                                         goto error;
 623                                 }
 624                         }
 625                         if (strlen(strval) > ZPROP_MAX_COMMENT) {
 626                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 627                                     "comment must not exceed %d characters"),
 628                                     ZPROP_MAX_COMMENT);
 629                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 630                                 goto error;
 631                         }
 632                         break;
 633                 case ZPOOL_PROP_READONLY:
 634                         if (!flags.import) {
 635                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 636                                     "property '%s' can only be set at "
 637                                     "import time"), propname);
 638                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 639                                 goto error;
 640                         }
 641                         break;
 642
 643                 default:
 644                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 645                             "property '%s'(%d) not defined"), propname, prop);
 646                         break;
 647                 }
 648         }
 649
 650         return (retprops);
 651 error:
 652         nvlist_free(retprops);
 653         return (NULL);
 654 }
 655
 656 /*
 657  * Set zpool property : propname=propval.
 658  */
 659 int
 660 zpool_set_prop(zpool_handle_t *zhp, const char *propname, const char *propval)
 661 {
 662         zfs_cmd_t zc = { 0 };
 663         int ret = -1;
 664         char errbuf[1024];
 665         nvlist_t *nvl = NULL;
 666         nvlist_t *realprops;
 667         uint64_t version;
 668         prop_flags_t flags = { 0 };
 669
 670         (void) snprintf(errbuf, sizeof (errbuf),
 671             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
 672             zhp->zpool_name);
 673
 674         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
 675                 return (no_memory(zhp->zpool_hdl));
 676
 677         if (nvlist_add_string(nvl, propname, propval) != 0) {
 678                 nvlist_free(nvl);
 679                 return (no_memory(zhp->zpool_hdl));
 680         }
 681
 682         version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL);
 683         if ((realprops = zpool_valid_proplist(zhp->zpool_hdl,
 684             zhp->zpool_name, nvl, version, flags, errbuf)) == NULL) {
 685                 nvlist_free(nvl);
 686                 return (-1);
 687         }
 688
 689         nvlist_free(nvl);
 690         nvl = realprops;
 691
 692         /*
 693          * Execute the corresponding ioctl() to set this property.
 694          */
 695         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
 696
 697         if (zcmd_write_src_nvlist(zhp->zpool_hdl, &zc, nvl) != 0) {
 698                 nvlist_free(nvl);
 699                 return (-1);
 700         }
 701
 702         ret = zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_SET_PROPS, &zc);
 703
 704         zcmd_free_nvlists(&zc);
 705         nvlist_free(nvl);
 706
 707         if (ret)
 708                 (void) zpool_standard_error(zhp->zpool_hdl, errno, errbuf);
 709         else
 710                 (void) zpool_props_refresh(zhp);
 711
 712         return (ret);
 713 }
 714
 715 int
 716 zpool_expand_proplist(zpool_handle_t *zhp, zprop_list_t **plp)
 717 {
 718         libzfs_handle_t *hdl = zhp->zpool_hdl;
 719         zprop_list_t *entry;
 720         char buf[ZFS_MAXPROPLEN];
 721         nvlist_t *features = NULL;
 722         zprop_list_t **last;
 723         boolean_t firstexpand = (NULL == *plp);
 724
 725         if (zprop_expand_list(hdl, plp, ZFS_TYPE_POOL) != 0)
 726                 return (-1);
 727
 728         last = plp;
 729         while (*last != NULL)
 730                 last = &(*last)->pl_next;
 731
 732         if ((*plp)->pl_all)
 733                 features = zpool_get_features(zhp);
 734
 735         if ((*plp)->pl_all && firstexpand) {
 736                 for (int i = 0; i < SPA_FEATURES; i++) {
 737                         zprop_list_t *entry = zfs_alloc(hdl,
 738                             sizeof (zprop_list_t));
 739                         entry->pl_prop = ZPROP_INVAL;
 740                         entry->pl_user_prop = zfs_asprintf(hdl, "feature@%s",
 741                             spa_feature_table[i].fi_uname);
 742                         entry->pl_width = strlen(entry->pl_user_prop);
 743                         entry->pl_all = B_TRUE;
 744
 745                         *last = entry;
 746                         last = &entry->pl_next;
 747                 }
 748         }
 749
 750         /* add any unsupported features */
 751         for (nvpair_t *nvp = nvlist_next_nvpair(features, NULL);
 752             nvp != NULL; nvp = nvlist_next_nvpair(features, nvp)) {
 753                 char *propname;
 754                 boolean_t found;
 755                 zprop_list_t *entry;
 756
 757                 if (zfeature_is_supported(nvpair_name(nvp)))
 758                         continue;
 759
 760                 propname = zfs_asprintf(hdl, "unsupported@%s",
 761                     nvpair_name(nvp));
 762
 763                 /*
 764                  * Before adding the property to the list make sure that no
 765                  * other pool already added the same property.
 766                  */
 767                 found = B_FALSE;
 768                 entry = *plp;
 769                 while (entry != NULL) {
 770                         if (entry->pl_user_prop != NULL &&
 771                             strcmp(propname, entry->pl_user_prop) == 0) {
 772                                 found = B_TRUE;
 773                                 break;
 774                         }
 775                         entry = entry->pl_next;
 776                 }
 777                 if (found) {
 778                         free(propname);
 779                         continue;
 780                 }
 781
 782                 entry = zfs_alloc(hdl, sizeof (zprop_list_t));
 783                 entry->pl_prop = ZPROP_INVAL;
 784                 entry->pl_user_prop = propname;
 785                 entry->pl_width = strlen(entry->pl_user_prop);
 786                 entry->pl_all = B_TRUE;
 787
 788                 *last = entry;
 789                 last = &entry->pl_next;
 790         }
 791
 792         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
 793
 794                 if (entry->pl_fixed)
 795                         continue;
 796
 797                 if (entry->pl_prop != ZPROP_INVAL &&
 798                     zpool_get_prop(zhp, entry->pl_prop, buf, sizeof (buf),
 799                     NULL, B_FALSE) == 0) {
 800                         if (strlen(buf) > entry->pl_width)
 801                                 entry->pl_width = strlen(buf);
 802                 }
 803         }
 804
 805         return (0);
 806 }
 807
 808 /*
 809  * Get the state for the given feature on the given ZFS pool.
 810  */
 811 int
 812 zpool_prop_get_feature(zpool_handle_t *zhp, const char *propname, char *buf,
 813     size_t len)
 814 {
 815         uint64_t refcount;
 816         boolean_t found = B_FALSE;
 817         nvlist_t *features = zpool_get_features(zhp);
 818         boolean_t supported;
 819         const char *feature = strchr(propname, '@') + 1;
 820
 821         supported = zpool_prop_feature(propname);
 822         ASSERT(supported || zpool_prop_unsupported(propname));
 823
 824         /*
 825          * Convert from feature name to feature guid. This conversion is
 826          * unecessary for unsupported@... properties because they already
 827          * use guids.
 828          */
 829         if (supported) {
 830                 int ret;
 831                 spa_feature_t fid;
 832
 833                 ret = zfeature_lookup_name(feature, &fid);
 834                 if (ret != 0) {
 835                         (void) strlcpy(buf, "-", len);
 836                         return (ENOTSUP);
 837                 }
 838                 feature = spa_feature_table[fid].fi_guid;
 839         }
 840
 841         if (nvlist_lookup_uint64(features, feature, &refcount) == 0)
 842                 found = B_TRUE;
 843
 844         if (supported) {
 845                 if (!found) {
 846                         (void) strlcpy(buf, ZFS_FEATURE_DISABLED, len);
 847                 } else  {
 848                         if (refcount == 0)
 849                                 (void) strlcpy(buf, ZFS_FEATURE_ENABLED, len);
 850                         else
 851                                 (void) strlcpy(buf, ZFS_FEATURE_ACTIVE, len);
 852                 }
 853         } else {
 854                 if (found) {
 855                         if (refcount == 0) {
 856                                 (void) strcpy(buf, ZFS_UNSUPPORTED_INACTIVE);
 857                         } else {
 858                                 (void) strcpy(buf, ZFS_UNSUPPORTED_READONLY);
 859                         }
 860                 } else {
 861                         (void) strlcpy(buf, "-", len);
 862                         return (ENOTSUP);
 863                 }
 864         }
 865
 866         return (0);
 867 }
 868
 869 /*
 870  * Don't start the slice at the default block of 34; many storage
 871  * devices will use a stripe width of 128k, so start there instead.
 872  */
 873 #define NEW_START_BLOCK 256
 874
 875 /*
 876  * Validate the given pool name, optionally putting an extended error message in
 877  * 'buf'.
 878  */
 879 boolean_t
 880 zpool_name_valid(libzfs_handle_t *hdl, boolean_t isopen, const char *pool)
 881 {
 882         namecheck_err_t why;
 883         char what;
 884         int ret;
 885
 886         ret = pool_namecheck(pool, &why, &what);
 887
 888         /*
 889          * The rules for reserved pool names were extended at a later point.
 890          * But we need to support users with existing pools that may now be
 891          * invalid.  So we only check for this expanded set of names during a
 892          * create (or import), and only in userland.
 893          */
 894         if (ret == 0 && !isopen &&
 895             (strncmp(pool, "mirror", 6) == 0 ||
 896             strncmp(pool, "raidz", 5) == 0 ||
 897             strncmp(pool, "spare", 5) == 0 ||
 898             strcmp(pool, "log") == 0)) {
 899                 if (hdl != NULL)
 900                         zfs_error_aux(hdl,
 901                             dgettext(TEXT_DOMAIN, "name is reserved"));
 902                 return (B_FALSE);
 903         }
 904
 905
 906         if (ret != 0) {
 907                 if (hdl != NULL) {
 908                         switch (why) {
 909                         case NAME_ERR_TOOLONG:
 910                                 zfs_error_aux(hdl,
 911                                     dgettext(TEXT_DOMAIN, "name is too long"));
 912                                 break;
 913
 914                         case NAME_ERR_INVALCHAR:
 915                                 zfs_error_aux(hdl,
 916                                     dgettext(TEXT_DOMAIN, "invalid character "
 917                                     "'%c' in pool name"), what);
 918                                 break;
 919
 920                         case NAME_ERR_NOLETTER:
 921                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 922                                     "name must begin with a letter"));
 923                                 break;
 924
 925                         case NAME_ERR_RESERVED:
 926                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 927                                     "name is reserved"));
 928                                 break;
 929
 930                         case NAME_ERR_DISKLIKE:
 931                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 932                                     "pool name is reserved"));
 933                                 break;
 934
 935                         case NAME_ERR_LEADING_SLASH:
 936                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 937                                     "leading slash in name"));
 938                                 break;
 939
 940                         case NAME_ERR_EMPTY_COMPONENT:
 941                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 942                                     "empty component in name"));
 943                                 break;
 944
 945                         case NAME_ERR_TRAILING_SLASH:
 946                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 947                                     "trailing slash in name"));
 948                                 break;
 949
 950                         case NAME_ERR_MULTIPLE_AT:
 951                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 952                                     "multiple '@' delimiters in name"));
 953                                 break;
 954
 955                         default:
 956                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 957                                     "(%d) not defined"), why);
 958                                 break;
 959                         }
 960                 }
 961                 return (B_FALSE);
 962         }
 963
 964         return (B_TRUE);
 965 }
 966
 967 /*
 968  * Open a handle to the given pool, even if the pool is currently in the FAULTED
 969  * state.
 970  */
 971 zpool_handle_t *
 972 zpool_open_canfail(libzfs_handle_t *hdl, const char *pool)
 973 {
 974         zpool_handle_t *zhp;
 975         boolean_t missing;
 976
 977         /*
 978          * Make sure the pool name is valid.
 979          */
 980         if (!zpool_name_valid(hdl, B_TRUE, pool)) {
 981                 (void) zfs_error_fmt(hdl, EZFS_INVALIDNAME,
 982                     dgettext(TEXT_DOMAIN, "cannot open '%s'"),
 983                     pool);
 984                 return (NULL);
 985         }
 986
 987         if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL)
 988                 return (NULL);
 989
 990         zhp->zpool_hdl = hdl;
 991         (void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name));
 992
 993         if (zpool_refresh_stats(zhp, &missing) != 0) {
 994                 zpool_close(zhp);
 995                 return (NULL);
 996         }
 997
 998         if (missing) {
 999                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "no such pool"));
1000                 (void) zfs_error_fmt(hdl, EZFS_NOENT,
1001                     dgettext(TEXT_DOMAIN, "cannot open '%s'"), pool);
1002                 zpool_close(zhp);
1003                 return (NULL);
1004         }
1005
1006         return (zhp);
1007 }
1008
1009 /*
1010  * Like the above, but silent on error.  Used when iterating over pools (because
1011  * the configuration cache may be out of date).
1012  */
1013 int
1014 zpool_open_silent(libzfs_handle_t *hdl, const char *pool, zpool_handle_t **ret)
1015 {
1016         zpool_handle_t *zhp;
1017         boolean_t missing;
1018
1019         if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL)
1020                 return (-1);
1021
1022         zhp->zpool_hdl = hdl;
1023         (void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name));
1024
1025         if (zpool_refresh_stats(zhp, &missing) != 0) {
1026                 zpool_close(zhp);
1027                 return (-1);
1028         }
1029
1030         if (missing) {
1031                 zpool_close(zhp);
1032                 *ret = NULL;
1033                 return (0);
1034         }
1035
1036         *ret = zhp;
1037         return (0);
1038 }
1039
1040 /*
1041  * Similar to zpool_open_canfail(), but refuses to open pools in the faulted
1042  * state.
1043  */
1044 zpool_handle_t *
1045 zpool_open(libzfs_handle_t *hdl, const char *pool)
1046 {
1047         zpool_handle_t *zhp;
1048
1049         if ((zhp = zpool_open_canfail(hdl, pool)) == NULL)
1050                 return (NULL);
1051
1052         if (zhp->zpool_state == POOL_STATE_UNAVAIL) {
1053                 (void) zfs_error_fmt(hdl, EZFS_POOLUNAVAIL,
1054                     dgettext(TEXT_DOMAIN, "cannot open '%s'"), zhp->zpool_name);
1055                 zpool_close(zhp);
1056                 return (NULL);
1057         }
1058
1059         return (zhp);
1060 }
1061
1062 /*
1063  * Close the handle.  Simply frees the memory associated with the handle.
1064  */
1065 void
1066 zpool_close(zpool_handle_t *zhp)
1067 {
1068         nvlist_free(zhp->zpool_config);
1069         nvlist_free(zhp->zpool_old_config);
1070         nvlist_free(zhp->zpool_props);
1071         free(zhp);
1072 }
1073
1074 /*
1075  * Return the name of the pool.
1076  */
1077 const char *
1078 zpool_get_name(zpool_handle_t *zhp)
1079 {
1080         return (zhp->zpool_name);
1081 }
1082
1083
1084 /*
1085  * Return the state of the pool (ACTIVE or UNAVAILABLE)
1086  */
1087 int
1088 zpool_get_state(zpool_handle_t *zhp)
1089 {
1090         return (zhp->zpool_state);
1091 }
1092
1093 /*
1094  * Create the named pool, using the provided vdev list.  It is assumed
1095  * that the consumer has already validated the contents of the nvlist, so we
1096  * don't have to worry about error semantics.
1097  */
1098 int
1099 zpool_create(libzfs_handle_t *hdl, const char *pool, nvlist_t *nvroot,
1100     nvlist_t *props, nvlist_t *fsprops)
1101 {
1102         zfs_cmd_t zc = { 0 };
1103         nvlist_t *zc_fsprops = NULL;
1104         nvlist_t *zc_props = NULL;
1105         char msg[1024];
1106         int ret = -1;
1107
1108         (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
1109             "cannot create '%s'"), pool);
1110
1111         if (!zpool_name_valid(hdl, B_FALSE, pool))
1112                 return (zfs_error(hdl, EZFS_INVALIDNAME, msg));
1113
1114         if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
1115                 return (-1);
1116
1117         if (props) {
1118                 prop_flags_t flags = { .create = B_TRUE, .import = B_FALSE };
1119
1120                 if ((zc_props = zpool_valid_proplist(hdl, pool, props,
1121                     SPA_VERSION_1, flags, msg)) == NULL) {
1122                         goto create_failed;
1123                 }
1124         }
1125
1126         if (fsprops) {
1127                 uint64_t zoned;
1128                 char *zonestr;
1129
1130                 zoned = ((nvlist_lookup_string(fsprops,
1131                     zfs_prop_to_name(ZFS_PROP_ZONED), &zonestr) == 0) &&
1132                     strcmp(zonestr, "on") == 0);
1133
1134                 if ((zc_fsprops = zfs_valid_proplist(hdl, ZFS_TYPE_FILESYSTEM,
1135                     fsprops, zoned, NULL, NULL, msg)) == NULL) {
1136                         goto create_failed;
1137                 }
1138                 if (!zc_props &&
1139                     (nvlist_alloc(&zc_props, NV_UNIQUE_NAME, 0) != 0)) {
1140                         goto create_failed;
1141                 }
1142                 if (nvlist_add_nvlist(zc_props,
1143                     ZPOOL_ROOTFS_PROPS, zc_fsprops) != 0) {
1144                         goto create_failed;
1145                 }
1146         }
1147
1148         if (zc_props && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0)
1149                 goto create_failed;
1150
1151         (void) strlcpy(zc.zc_name, pool, sizeof (zc.zc_name));
1152
1153         if ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_CREATE, &zc)) != 0) {
1154
1155                 zcmd_free_nvlists(&zc);
1156                 nvlist_free(zc_props);
1157                 nvlist_free(zc_fsprops);
1158
1159                 switch (errno) {
1160                 case EBUSY:
1161                         /*
1162                          * This can happen if the user has specified the same
1163                          * device multiple times.  We can't reliably detect this
1164                          * until we try to add it and see we already have a
1165                          * label.
1166                          */
1167                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1168                             "one or more vdevs refer to the same device"));
1169                         return (zfs_error(hdl, EZFS_BADDEV, msg));
1170
1171                 case ERANGE:
1172                         /*
1173                          * This happens if the record size is smaller or larger
1174                          * than the allowed size range, or not a power of 2.
1175                          *
1176                          * NOTE: although zfs_valid_proplist is called earlier,
1177                          * this case may have slipped through since the
1178                          * pool does not exist yet and it is therefore
1179                          * impossible to read properties e.g. max blocksize
1180                          * from the pool.
1181                          */
1182                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1183                             "record size invalid"));
1184                         return (zfs_error(hdl, EZFS_BADPROP, msg));
1185
1186                 case EOVERFLOW:
1187                         /*
1188                          * This occurs when one of the devices is below
1189                          * SPA_MINDEVSIZE.  Unfortunately, we can't detect which
1190                          * device was the problem device since there's no
1191                          * reliable way to determine device size from userland.
1192                          */
1193                         {
1194                                 char buf[64];
1195
1196                                 zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf));
1197
1198                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1199                                     "one or more devices is less than the "
1200                                     "minimum size (%s)"), buf);
1201                         }
1202                         return (zfs_error(hdl, EZFS_BADDEV, msg));
1203
1204                 case ENOSPC:
1205                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1206                             "one or more devices is out of space"));
1207                         return (zfs_error(hdl, EZFS_BADDEV, msg));
1208
1209                 case ENOTBLK:
1210                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1211                             "cache device must be a disk or disk slice"));
1212                         return (zfs_error(hdl, EZFS_BADDEV, msg));
1213
1214                 default:
1215                         return (zpool_standard_error(hdl, errno, msg));
1216                 }
1217         }
1218
1219 create_failed:
1220         zcmd_free_nvlists(&zc);
1221         nvlist_free(zc_props);
1222         nvlist_free(zc_fsprops);
1223         return (ret);
1224 }
1225
1226 /*
1227  * Destroy the given pool.  It is up to the caller to ensure that there are no
1228  * datasets left in the pool.
1229  */
1230 int
1231 zpool_destroy(zpool_handle_t *zhp, const char *log_str)
1232 {
1233         zfs_cmd_t zc = { 0 };
1234         zfs_handle_t *zfp = NULL;
1235         libzfs_handle_t *hdl = zhp->zpool_hdl;
1236         char msg[1024];
1237
1238         if (zhp->zpool_state == POOL_STATE_ACTIVE &&
1239             (zfp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_FILESYSTEM)) == NULL)
1240                 return (-1);
1241
1242         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
1243         zc.zc_history = (uint64_t)(uintptr_t)log_str;
1244
1245         if (zfs_ioctl(hdl, ZFS_IOC_POOL_DESTROY, &zc) != 0) {
1246                 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
1247                     "cannot destroy '%s'"), zhp->zpool_name);
1248
1249                 if (errno == EROFS) {
1250                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1251                             "one or more devices is read only"));
1252                         (void) zfs_error(hdl, EZFS_BADDEV, msg);
1253                 } else {
1254                         (void) zpool_standard_error(hdl, errno, msg);
1255                 }
1256
1257                 if (zfp)
1258                         zfs_close(zfp);
1259                 return (-1);
1260         }
1261
1262         if (zfp) {
1263                 remove_mountpoint(zfp);
1264                 zfs_close(zfp);
1265         }
1266
1267         return (0);
1268 }
1269
1270 /*
1271  * Add the given vdevs to the pool.  The caller must have already performed the
1272  * necessary verification to ensure that the vdev specification is well-formed.
1273  */
1274 int
1275 zpool_add(zpool_handle_t *zhp, nvlist_t *nvroot)
1276 {
1277         zfs_cmd_t zc = { 0 };
1278         int ret;
1279         libzfs_handle_t *hdl = zhp->zpool_hdl;
1280         char msg[1024];
1281         nvlist_t **spares, **l2cache;
1282         uint_t nspares, nl2cache;
1283
1284         (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
1285             "cannot add to '%s'"), zhp->zpool_name);
1286
1287         if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) <
1288             SPA_VERSION_SPARES &&
1289             nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
1290             &spares, &nspares) == 0) {
1291                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be "
1292                     "upgraded to add hot spares"));
1293                 return (zfs_error(hdl, EZFS_BADVERSION, msg));
1294         }
1295
1296         if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) <
1297             SPA_VERSION_L2CACHE &&
1298             nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
1299             &l2cache, &nl2cache) == 0) {
1300                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be "
1301                     "upgraded to add cache devices"));
1302                 return (zfs_error(hdl, EZFS_BADVERSION, msg));
1303         }
1304
1305         if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
1306                 return (-1);
1307         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
1308
1309         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_ADD, &zc) != 0) {
1310                 switch (errno) {
1311                 case EBUSY:
1312                         /*
1313                          * This can happen if the user has specified the same
1314                          * device multiple times.  We can't reliably detect this
1315                          * until we try to add it and see we already have a
1316                          * label.
1317                          */
1318                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1319                             "one or more vdevs refer to the same device"));
1320                         (void) zfs_error(hdl, EZFS_BADDEV, msg);
1321                         break;
1322
1323                 case EOVERFLOW:
1324                         /*
1325                          * This occurrs when one of the devices is below
1326                          * SPA_MINDEVSIZE.  Unfortunately, we can't detect which
1327                          * device was the problem device since there's no
1328                          * reliable way to determine device size from userland.
1329                          */
1330                         {
1331                                 char buf[64];
1332
1333                                 zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf));
1334
1335                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1336                                     "device is less than the minimum "
1337                                     "size (%s)"), buf);
1338                         }
1339                         (void) zfs_error(hdl, EZFS_BADDEV, msg);
1340                         break;
1341
1342                 case ENOTSUP:
1343                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1344                             "pool must be upgraded to add these vdevs"));
1345                         (void) zfs_error(hdl, EZFS_BADVERSION, msg);
1346                         break;
1347
1348                 case EDOM:
1349                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1350                             "root pool can not have multiple vdevs"
1351                             " or separate logs"));
1352                         (void) zfs_error(hdl, EZFS_POOL_NOTSUP, msg);
1353                         break;
1354
1355                 case ENOTBLK:
1356                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1357                             "cache device must be a disk or disk slice"));
1358                         (void) zfs_error(hdl, EZFS_BADDEV, msg);
1359                         break;
1360
1361                 default:
1362                         (void) zpool_standard_error(hdl, errno, msg);
1363                 }
1364
1365                 ret = -1;
1366         } else {
1367                 ret = 0;
1368         }
1369
1370         zcmd_free_nvlists(&zc);
1371
1372         return (ret);
1373 }
1374
1375 /*
1376  * Exports the pool from the system.  The caller must ensure that there are no
1377  * mounted datasets in the pool.
1378  */
1379 static int
1380 zpool_export_common(zpool_handle_t *zhp, boolean_t force, boolean_t hardforce,
1381     const char *log_str)
1382 {
1383         zfs_cmd_t zc = { 0 };
1384         char msg[1024];
1385
1386         (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
1387             "cannot export '%s'"), zhp->zpool_name);
1388
1389         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
1390         zc.zc_cookie = force;
1391         zc.zc_guid = hardforce;
1392         zc.zc_history = (uint64_t)(uintptr_t)log_str;
1393
1394         if (zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_EXPORT, &zc) != 0) {
1395                 switch (errno) {
1396                 case EXDEV:
1397                         zfs_error_aux(zhp->zpool_hdl, dgettext(TEXT_DOMAIN,
1398                             "use '-f' to override the following errors:\n"
1399                             "'%s' has an active shared spare which could be"
1400                             " used by other pools once '%s' is exported."),
1401                             zhp->zpool_name, zhp->zpool_name);
1402                         return (zfs_error(zhp->zpool_hdl, EZFS_ACTIVE_SPARE,
1403                             msg));
1404                 default:
1405                         return (zpool_standard_error_fmt(zhp->zpool_hdl, errno,
1406                             msg));
1407                 }
1408         }
1409
1410         return (0);
1411 }
1412
1413 int
1414 zpool_export(zpool_handle_t *zhp, boolean_t force, const char *log_str)
1415 {
1416         return (zpool_export_common(zhp, force, B_FALSE, log_str));
1417 }
1418
1419 int
1420 zpool_export_force(zpool_handle_t *zhp, const char *log_str)
1421 {
1422         return (zpool_export_common(zhp, B_TRUE, B_TRUE, log_str));
1423 }
1424
1425 static void
1426 zpool_rewind_exclaim(libzfs_handle_t *hdl, const char *name, boolean_t dryrun,
1427     nvlist_t *config)
1428 {
1429         nvlist_t *nv = NULL;
1430         uint64_t rewindto;
1431         int64_t loss = -1;
1432         struct tm t;
1433         char timestr[128];
1434
1435         if (!hdl->libzfs_printerr || config == NULL)
1436                 return;
1437
1438         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0 ||
1439             nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0) {
1440                 return;
1441         }
1442
1443         if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0)
1444                 return;
1445         (void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss);
1446
1447         if (localtime_r((time_t *)&rewindto, &t) != NULL &&
1448             strftime(timestr, 128, 0, &t) != 0) {
1449                 if (dryrun) {
1450                         (void) printf(dgettext(TEXT_DOMAIN,
1451                             "Would be able to return %s "
1452                             "to its state as of %s.\n"),
1453                             name, timestr);
1454                 } else {
1455                         (void) printf(dgettext(TEXT_DOMAIN,
1456                             "Pool %s returned to its state as of %s.\n"),
1457                             name, timestr);
1458                 }
1459                 if (loss > 120) {
1460                         (void) printf(dgettext(TEXT_DOMAIN,
1461                             "%s approximately %lld "),
1462                             dryrun ? "Would discard" : "Discarded",
1463                             (loss + 30) / 60);
1464                         (void) printf(dgettext(TEXT_DOMAIN,
1465                             "minutes of transactions.\n"));
1466                 } else if (loss > 0) {
1467                         (void) printf(dgettext(TEXT_DOMAIN,
1468                             "%s approximately %lld "),
1469                             dryrun ? "Would discard" : "Discarded", loss);
1470                         (void) printf(dgettext(TEXT_DOMAIN,
1471                             "seconds of transactions.\n"));
1472                 }
1473         }
1474 }
1475
1476 void
1477 zpool_explain_recover(libzfs_handle_t *hdl, const char *name, int reason,
1478     nvlist_t *config)
1479 {
1480         nvlist_t *nv = NULL;
1481         int64_t loss = -1;
1482         uint64_t edata = UINT64_MAX;
1483         uint64_t rewindto;
1484         struct tm t;
1485         char timestr[128];
1486
1487         if (!hdl->libzfs_printerr)
1488                 return;
1489
1490         if (reason >= 0)
1491                 (void) printf(dgettext(TEXT_DOMAIN, "action: "));
1492         else
1493                 (void) printf(dgettext(TEXT_DOMAIN, "\t"));
1494
1495         /* All attempted rewinds failed if ZPOOL_CONFIG_LOAD_TIME missing */
1496         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0 ||
1497             nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0 ||
1498             nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0)
1499                 goto no_info;
1500
1501         (void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss);
1502         (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_DATA_ERRORS,
1503             &edata);
1504
1505         (void) printf(dgettext(TEXT_DOMAIN,
1506             "Recovery is possible, but will result in some data loss.\n"));
1507
1508         if (localtime_r((time_t *)&rewindto, &t) != NULL &&
1509             strftime(timestr, 128, 0, &t) != 0) {
1510                 (void) printf(dgettext(TEXT_DOMAIN,
1511                     "\tReturning the pool to its state as of %s\n"
1512                     "\tshould correct the problem.  "),
1513                     timestr);
1514         } else {
1515                 (void) printf(dgettext(TEXT_DOMAIN,
1516                     "\tReverting the pool to an earlier state "
1517                     "should correct the problem.\n\t"));
1518         }
1519
1520         if (loss > 120) {
1521                 (void) printf(dgettext(TEXT_DOMAIN,
1522                     "Approximately %lld minutes of data\n"
1523                     "\tmust be discarded, irreversibly.  "), (loss + 30) / 60);
1524         } else if (loss > 0) {
1525                 (void) printf(dgettext(TEXT_DOMAIN,
1526                     "Approximately %lld seconds of data\n"
1527                     "\tmust be discarded, irreversibly.  "), loss);
1528         }
1529         if (edata != 0 && edata != UINT64_MAX) {
1530                 if (edata == 1) {
1531                         (void) printf(dgettext(TEXT_DOMAIN,
1532                             "After rewind, at least\n"
1533                             "\tone persistent user-data error will remain.  "));
1534                 } else {
1535                         (void) printf(dgettext(TEXT_DOMAIN,
1536                             "After rewind, several\n"
1537                             "\tpersistent user-data errors will remain.  "));
1538                 }
1539         }
1540         (void) printf(dgettext(TEXT_DOMAIN,
1541             "Recovery can be attempted\n\tby executing 'zpool %s -F %s'.  "),
1542             reason >= 0 ? "clear" : "import", name);
1543
1544         (void) printf(dgettext(TEXT_DOMAIN,
1545             "A scrub of the pool\n"
1546             "\tis strongly recommended after recovery.\n"));
1547         return;
1548
1549 no_info:
1550         (void) printf(dgettext(TEXT_DOMAIN,
1551             "Destroy and re-create the pool from\n\ta backup source.\n"));
1552 }
1553
1554 /*
1555  * zpool_import() is a contracted interface. Should be kept the same
1556  * if possible.
1557  *
1558  * Applications should use zpool_import_props() to import a pool with
1559  * new properties value to be set.
1560  */
1561 int
1562 zpool_import(libzfs_handle_t *hdl, nvlist_t *config, const char *newname,
1563     char *altroot)
1564 {
1565         nvlist_t *props = NULL;
1566         int ret;
1567
1568         if (altroot != NULL) {
1569                 if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
1570                         return (zfs_error_fmt(hdl, EZFS_NOMEM,
1571                             dgettext(TEXT_DOMAIN, "cannot import '%s'"),
1572                             newname));
1573                 }
1574
1575                 if (nvlist_add_string(props,
1576                     zpool_prop_to_name(ZPOOL_PROP_ALTROOT), altroot) != 0 ||
1577                     nvlist_add_string(props,
1578                     zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), "none") != 0) {
1579                         nvlist_free(props);
1580                         return (zfs_error_fmt(hdl, EZFS_NOMEM,
1581                             dgettext(TEXT_DOMAIN, "cannot import '%s'"),
1582                             newname));
1583                 }
1584         }
1585
1586         ret = zpool_import_props(hdl, config, newname, props,
1587             ZFS_IMPORT_NORMAL);
1588         nvlist_free(props);
1589         return (ret);
1590 }
1591
1592 static void
1593 print_vdev_tree(libzfs_handle_t *hdl, const char *name, nvlist_t *nv,
1594     int indent)
1595 {
1596         nvlist_t **child;
1597         uint_t c, children;
1598         char *vname;
1599         uint64_t is_log = 0;
1600
1601         (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG,
1602             &is_log);
1603
1604         if (name != NULL)
1605                 (void) printf("\t%*s%s%s\n", indent, "", name,
1606                     is_log ? " [log]" : "");
1607
1608         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1609             &child, &children) != 0)
1610                 return;
1611
1612         for (c = 0; c < children; c++) {
1613                 vname = zpool_vdev_name(hdl, NULL, child[c], B_TRUE);
1614                 print_vdev_tree(hdl, vname, child[c], indent + 2);
1615                 free(vname);
1616         }
1617 }
1618
1619 void
1620 zpool_print_unsup_feat(nvlist_t *config)
1621 {
1622         nvlist_t *nvinfo, *unsup_feat;
1623
1624         verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nvinfo) ==
1625             0);
1626         verify(nvlist_lookup_nvlist(nvinfo, ZPOOL_CONFIG_UNSUP_FEAT,
1627             &unsup_feat) == 0);
1628
1629         for (nvpair_t *nvp = nvlist_next_nvpair(unsup_feat, NULL); nvp != NULL;
1630             nvp = nvlist_next_nvpair(unsup_feat, nvp)) {
1631                 char *desc;
1632
1633                 verify(nvpair_type(nvp) == DATA_TYPE_STRING);
1634                 verify(nvpair_value_string(nvp, &desc) == 0);
1635
1636                 if (strlen(desc) > 0)
1637                         (void) printf("\t%s (%s)\n", nvpair_name(nvp), desc);
1638                 else
1639                         (void) printf("\t%s\n", nvpair_name(nvp));
1640         }
1641 }
1642
1643 /*
1644  * Import the given pool using the known configuration and a list of
1645  * properties to be set. The configuration should have come from
1646  * zpool_find_import(). The 'newname' parameters control whether the pool
1647  * is imported with a different name.
1648  */
1649 int
1650 zpool_import_props(libzfs_handle_t *hdl, nvlist_t *config, const char *newname,
1651     nvlist_t *props, int flags)
1652 {
1653         zfs_cmd_t zc = { 0 };
1654         zpool_rewind_policy_t policy;
1655         nvlist_t *nv = NULL;
1656         nvlist_t *nvinfo = NULL;
1657         nvlist_t *missing = NULL;
1658         char *thename;
1659         char *origname;
1660         int ret;
1661         int error = 0;
1662         char errbuf[1024];
1663
1664         verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
1665             &origname) == 0);
1666
1667         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1668             "cannot import pool '%s'"), origname);
1669
1670         if (newname != NULL) {
1671                 if (!zpool_name_valid(hdl, B_FALSE, newname))
1672                         return (zfs_error_fmt(hdl, EZFS_INVALIDNAME,
1673                             dgettext(TEXT_DOMAIN, "cannot import '%s'"),
1674                             newname));
1675                 thename = (char *)newname;
1676         } else {
1677                 thename = origname;
1678         }
1679
1680         if (props != NULL) {
1681                 uint64_t version;
1682                 prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE };
1683
1684                 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
1685                     &version) == 0);
1686
1687                 if ((props = zpool_valid_proplist(hdl, origname,
1688                     props, version, flags, errbuf)) == NULL)
1689                         return (-1);
1690                 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
1691                         nvlist_free(props);
1692                         return (-1);
1693                 }
1694                 nvlist_free(props);
1695         }
1696
1697         (void) strlcpy(zc.zc_name, thename, sizeof (zc.zc_name));
1698
1699         verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
1700             &zc.zc_guid) == 0);
1701
1702         if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0) {
1703                 zcmd_free_nvlists(&zc);
1704                 return (-1);
1705         }
1706         if (zcmd_alloc_dst_nvlist(hdl, &zc, zc.zc_nvlist_conf_size * 2) != 0) {
1707                 zcmd_free_nvlists(&zc);
1708                 return (-1);
1709         }
1710
1711         zc.zc_cookie = flags;
1712         while ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_IMPORT, &zc)) != 0 &&
1713             errno == ENOMEM) {
1714                 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
1715                         zcmd_free_nvlists(&zc);
1716                         return (-1);
1717                 }
1718         }
1719         if (ret != 0)
1720                 error = errno;
1721
1722         (void) zcmd_read_dst_nvlist(hdl, &zc, &nv);
1723
1724         zcmd_free_nvlists(&zc);
1725
1726         zpool_get_rewind_policy(config, &policy);
1727
1728         if (error) {
1729                 char desc[1024];
1730
1731                 /*
1732                  * Dry-run failed, but we print out what success
1733                  * looks like if we found a best txg
1734                  */
1735                 if (policy.zrp_request & ZPOOL_TRY_REWIND) {
1736                         zpool_rewind_exclaim(hdl, newname ? origname : thename,
1737                             B_TRUE, nv);
1738                         nvlist_free(nv);
1739                         return (-1);
1740                 }
1741
1742                 if (newname == NULL)
1743                         (void) snprintf(desc, sizeof (desc),
1744                             dgettext(TEXT_DOMAIN, "cannot import '%s'"),
1745                             thename);
1746                 else
1747                         (void) snprintf(desc, sizeof (desc),
1748                             dgettext(TEXT_DOMAIN, "cannot import '%s' as '%s'"),
1749                             origname, thename);
1750
1751                 switch (error) {
1752                 case ENOTSUP:
1753                         if (nv != NULL && nvlist_lookup_nvlist(nv,
1754                             ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 0 &&
1755                             nvlist_exists(nvinfo, ZPOOL_CONFIG_UNSUP_FEAT)) {
1756                                 (void) printf(dgettext(TEXT_DOMAIN, "This "
1757                                     "pool uses the following feature(s) not "
1758                                     "supported by this system:\n"));
1759                                 zpool_print_unsup_feat(nv);
1760                                 if (nvlist_exists(nvinfo,
1761                                     ZPOOL_CONFIG_CAN_RDONLY)) {
1762                                         (void) printf(dgettext(TEXT_DOMAIN,
1763                                             "All unsupported features are only "
1764                                             "required for writing to the pool."
1765                                             "\nThe pool can be imported using "
1766                                             "'-o readonly=on'.\n"));
1767                                 }
1768                         }
1769                         /*
1770                          * Unsupported version.
1771                          */
1772                         (void) zfs_error(hdl, EZFS_BADVERSION, desc);
1773                         break;
1774
1775                 case EINVAL:
1776                         (void) zfs_error(hdl, EZFS_INVALCONFIG, desc);
1777                         break;
1778
1779                 case EROFS:
1780                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1781                             "one or more devices is read only"));
1782                         (void) zfs_error(hdl, EZFS_BADDEV, desc);
1783                         break;
1784
1785                 case ENXIO:
1786                         if (nv && nvlist_lookup_nvlist(nv,
1787                             ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 0 &&
1788                             nvlist_lookup_nvlist(nvinfo,
1789                             ZPOOL_CONFIG_MISSING_DEVICES, &missing) == 0) {
1790                                 (void) printf(dgettext(TEXT_DOMAIN,
1791                                     "The devices below are missing, use "
1792                                     "'-m' to import the pool anyway:\n"));
1793                                 print_vdev_tree(hdl, NULL, missing, 2);
1794                                 (void) printf("\n");
1795                         }
1796                         (void) zpool_standard_error(hdl, error, desc);
1797                         break;
1798
1799                 case EEXIST:
1800                         (void) zpool_standard_error(hdl, error, desc);
1801                         break;
1802
1803                 default:
1804                         (void) zpool_standard_error(hdl, error, desc);
1805                         zpool_explain_recover(hdl,
1806                             newname ? origname : thename, -error, nv);
1807                         break;
1808                 }
1809
1810                 nvlist_free(nv);
1811                 ret = -1;
1812         } else {
1813                 zpool_handle_t *zhp;
1814
1815                 /*
1816                  * This should never fail, but play it safe anyway.
1817                  */
1818                 if (zpool_open_silent(hdl, thename, &zhp) != 0)
1819                         ret = -1;
1820                 else if (zhp != NULL)
1821                         zpool_close(zhp);
1822                 if (policy.zrp_request &
1823                     (ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) {
1824                         zpool_rewind_exclaim(hdl, newname ? origname : thename,
1825                             ((policy.zrp_request & ZPOOL_TRY_REWIND) != 0), nv);
1826                 }
1827                 nvlist_free(nv);
1828                 return (0);
1829         }
1830
1831         return (ret);
1832 }
1833
1834 /*
1835  * Scan the pool.
1836  */
1837 int
1838 zpool_scan(zpool_handle_t *zhp, pool_scan_func_t func)
1839 {
1840         zfs_cmd_t zc = { 0 };
1841         char msg[1024];
1842         libzfs_handle_t *hdl = zhp->zpool_hdl;
1843
1844         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
1845         zc.zc_cookie = func;
1846
1847         if (zfs_ioctl(hdl, ZFS_IOC_POOL_SCAN, &zc) == 0 ||
1848             (errno == ENOENT && func != POOL_SCAN_NONE))
1849                 return (0);
1850
1851         if (func == POOL_SCAN_SCRUB) {
1852                 (void) snprintf(msg, sizeof (msg),
1853                     dgettext(TEXT_DOMAIN, "cannot scrub %s"), zc.zc_name);
1854         } else if (func == POOL_SCAN_NONE) {
1855                 (void) snprintf(msg, sizeof (msg),
1856                     dgettext(TEXT_DOMAIN, "cannot cancel scrubbing %s"),
1857                     zc.zc_name);
1858         } else {
1859                 assert(!"unexpected result");
1860         }
1861
1862         if (errno == EBUSY) {
1863                 nvlist_t *nvroot;
1864                 pool_scan_stat_t *ps = NULL;
1865                 uint_t psc;
1866
1867                 verify(nvlist_lookup_nvlist(zhp->zpool_config,
1868                     ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
1869                 (void) nvlist_lookup_uint64_array(nvroot,
1870                     ZPOOL_CONFIG_SCAN_STATS, (uint64_t **)&ps, &psc);
1871                 if (ps && ps->pss_func == POOL_SCAN_SCRUB)
1872                         return (zfs_error(hdl, EZFS_SCRUBBING, msg));
1873                 else
1874                         return (zfs_error(hdl, EZFS_RESILVERING, msg));
1875         } else if (errno == ENOENT) {
1876                 return (zfs_error(hdl, EZFS_NO_SCRUB, msg));
1877         } else {
1878                 return (zpool_standard_error(hdl, errno, msg));
1879         }
1880 }
1881
1882 #ifdef illumos
1883 /*
1884  * This provides a very minimal check whether a given string is likely a
1885  * c#t#d# style string.  Users of this are expected to do their own
1886  * verification of the s# part.
1887  */
1888 #define CTD_CHECK(str)  (str && str[0] == 'c' && isdigit(str[1]))
1889
1890 /*
1891  * More elaborate version for ones which may start with "/dev/dsk/"
1892  * and the like.
1893  */
1894 static int
1895 ctd_check_path(char *str)
1896 {
1897         /*
1898          * If it starts with a slash, check the last component.
1899          */
1900         if (str && str[0] == '/') {
1901                 char *tmp = strrchr(str, '/');
1902
1903                 /*
1904                  * If it ends in "/old", check the second-to-last
1905                  * component of the string instead.
1906                  */
1907                 if (tmp != str && strcmp(tmp, "/old") == 0) {
1908                         for (tmp--; *tmp != '/'; tmp--)
1909                                 ;
1910                 }
1911                 str = tmp + 1;
1912         }
1913         return (CTD_CHECK(str));
1914 }
1915 #endif
1916
1917 /*
1918  * Find a vdev that matches the search criteria specified. We use the
1919  * the nvpair name to determine how we should look for the device.
1920  * 'avail_spare' is set to TRUE if the provided guid refers to an AVAIL
1921  * spare; but FALSE if its an INUSE spare.
1922  */
1923 static nvlist_t *
1924 vdev_to_nvlist_iter(nvlist_t *nv, nvlist_t *search, boolean_t *avail_spare,
1925     boolean_t *l2cache, boolean_t *log)
1926 {
1927         uint_t c, children;
1928         nvlist_t **child;
1929         nvlist_t *ret;
1930         uint64_t is_log;
1931         char *srchkey;
1932         nvpair_t *pair = nvlist_next_nvpair(search, NULL);
1933
1934         /* Nothing to look for */
1935         if (search == NULL || pair == NULL)
1936                 return (NULL);
1937
1938         /* Obtain the key we will use to search */
1939         srchkey = nvpair_name(pair);
1940
1941         switch (nvpair_type(pair)) {
1942         case DATA_TYPE_UINT64:
1943                 if (strcmp(srchkey, ZPOOL_CONFIG_GUID) == 0) {
1944                         uint64_t srchval, theguid;
1945
1946                         verify(nvpair_value_uint64(pair, &srchval) == 0);
1947                         verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
1948                             &theguid) == 0);
1949                         if (theguid == srchval)
1950                                 return (nv);
1951                 }
1952                 break;
1953
1954         case DATA_TYPE_STRING: {
1955                 char *srchval, *val;
1956
1957                 verify(nvpair_value_string(pair, &srchval) == 0);
1958                 if (nvlist_lookup_string(nv, srchkey, &val) != 0)
1959                         break;
1960
1961                 /*
1962                  * Search for the requested value. Special cases:
1963                  *
1964                  * - ZPOOL_CONFIG_PATH for whole disk entries.  These end in
1965                  *   "s0" or "s0/old".  The "s0" part is hidden from the user,
1966                  *   but included in the string, so this matches around it.
1967                  * - looking for a top-level vdev name (i.e. ZPOOL_CONFIG_TYPE).
1968                  *
1969                  * Otherwise, all other searches are simple string compares.
1970                  */
1971 #ifdef illumos
1972                 if (strcmp(srchkey, ZPOOL_CONFIG_PATH) == 0 &&
1973                     ctd_check_path(val)) {
1974                         uint64_t wholedisk = 0;
1975
1976                         (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
1977                             &wholedisk);
1978                         if (wholedisk) {
1979                                 int slen = strlen(srchval);
1980                                 int vlen = strlen(val);
1981
1982                                 if (slen != vlen - 2)
1983                                         break;
1984
1985                                 /*
1986                                  * make_leaf_vdev() should only set
1987                                  * wholedisk for ZPOOL_CONFIG_PATHs which
1988                                  * will include "/dev/dsk/", giving plenty of
1989                                  * room for the indices used next.
1990                                  */
1991                                 ASSERT(vlen >= 6);
1992
1993                                 /*
1994                                  * strings identical except trailing "s0"
1995                                  */
1996                                 if (strcmp(&val[vlen - 2], "s0") == 0 &&
1997                                     strncmp(srchval, val, slen) == 0)
1998                                         return (nv);
1999
2000                                 /*
2001                                  * strings identical except trailing "s0/old"
2002                                  */
2003                                 if (strcmp(&val[vlen - 6], "s0/old") == 0 &&
2004                                     strcmp(&srchval[slen - 4], "/old") == 0 &&
2005                                     strncmp(srchval, val, slen - 4) == 0)
2006                                         return (nv);
2007
2008                                 break;
2009                         }
2010                 } else if (strcmp(srchkey, ZPOOL_CONFIG_TYPE) == 0 && val) {
2011 #else
2012                 if (strcmp(srchkey, ZPOOL_CONFIG_TYPE) == 0 && val) {
2013 #endif
2014                         char *type, *idx, *end, *p;
2015                         uint64_t id, vdev_id;
2016
2017                         /*
2018                          * Determine our vdev type, keeping in mind
2019                          * that the srchval is composed of a type and
2020                          * vdev id pair (i.e. mirror-4).
2021                          */
2022                         if ((type = strdup(srchval)) == NULL)
2023                                 return (NULL);
2024
2025                         if ((p = strrchr(type, '-')) == NULL) {
2026                                 free(type);
2027                                 break;
2028                         }
2029                         idx = p + 1;
2030                         *p = '\0';
2031
2032                         /*
2033                          * If the types don't match then keep looking.
2034                          */
2035                         if (strncmp(val, type, strlen(val)) != 0) {
2036                                 free(type);
2037                                 break;
2038                         }
2039
2040                         verify(strncmp(type, VDEV_TYPE_RAIDZ,
2041                             strlen(VDEV_TYPE_RAIDZ)) == 0 ||
2042                             strncmp(type, VDEV_TYPE_MIRROR,
2043                             strlen(VDEV_TYPE_MIRROR)) == 0);
2044                         verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID,
2045                             &id) == 0);
2046
2047                         errno = 0;
2048                         vdev_id = strtoull(idx, &end, 10);
2049
2050                         free(type);
2051                         if (errno != 0)
2052                                 return (NULL);
2053
2054                         /*
2055                          * Now verify that we have the correct vdev id.
2056                          */
2057                         if (vdev_id == id)
2058                                 return (nv);
2059                 }
2060
2061                 /*
2062                  * Common case
2063                  */
2064                 if (strcmp(srchval, val) == 0)
2065                         return (nv);
2066                 break;
2067         }
2068
2069         default:
2070                 break;
2071         }
2072
2073         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
2074             &child, &children) != 0)
2075                 return (NULL);
2076
2077         for (c = 0; c < children; c++) {
2078                 if ((ret = vdev_to_nvlist_iter(child[c], search,
2079                     avail_spare, l2cache, NULL)) != NULL) {
2080                         /*
2081                          * The 'is_log' value is only set for the toplevel
2082                          * vdev, not the leaf vdevs.  So we always lookup the
2083                          * log device from the root of the vdev tree (where
2084                          * 'log' is non-NULL).
2085                          */
2086                         if (log != NULL &&
2087                             nvlist_lookup_uint64(child[c],
2088                             ZPOOL_CONFIG_IS_LOG, &is_log) == 0 &&
2089                             is_log) {
2090                                 *log = B_TRUE;
2091                         }
2092                         return (ret);
2093                 }
2094         }
2095
2096         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
2097             &child, &children) == 0) {
2098                 for (c = 0; c < children; c++) {
2099                         if ((ret = vdev_to_nvlist_iter(child[c], search,
2100                             avail_spare, l2cache, NULL)) != NULL) {
2101                                 *avail_spare = B_TRUE;
2102                                 return (ret);
2103                         }
2104                 }
2105         }
2106
2107         if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
2108             &child, &children) == 0) {
2109                 for (c = 0; c < children; c++) {
2110                         if ((ret = vdev_to_nvlist_iter(child[c], search,
2111                             avail_spare, l2cache, NULL)) != NULL) {
2112                                 *l2cache = B_TRUE;
2113                                 return (ret);
2114                         }
2115                 }
2116         }
2117
2118         return (NULL);
2119 }
2120
2121 /*
2122  * Given a physical path (minus the "/devices" prefix), find the
2123  * associated vdev.
2124  */
2125 nvlist_t *
2126 zpool_find_vdev_by_physpath(zpool_handle_t *zhp, const char *ppath,
2127     boolean_t *avail_spare, boolean_t *l2cache, boolean_t *log)
2128 {
2129         nvlist_t *search, *nvroot, *ret;
2130
2131         verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2132         verify(nvlist_add_string(search, ZPOOL_CONFIG_PHYS_PATH, ppath) == 0);
2133
2134         verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE,
2135             &nvroot) == 0);
2136
2137         *avail_spare = B_FALSE;
2138         *l2cache = B_FALSE;
2139         if (log != NULL)
2140                 *log = B_FALSE;
2141         ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log);
2142         nvlist_free(search);
2143
2144         return (ret);
2145 }
2146
2147 /*
2148  * Determine if we have an "interior" top-level vdev (i.e mirror/raidz).
2149  */
2150 boolean_t
2151 zpool_vdev_is_interior(const char *name)
2152 {
2153         if (strncmp(name, VDEV_TYPE_RAIDZ, strlen(VDEV_TYPE_RAIDZ)) == 0 ||
2154             strncmp(name, VDEV_TYPE_MIRROR, strlen(VDEV_TYPE_MIRROR)) == 0)
2155                 return (B_TRUE);
2156         return (B_FALSE);
2157 }
2158
2159 nvlist_t *
2160 zpool_find_vdev(zpool_handle_t *zhp, const char *path, boolean_t *avail_spare,
2161     boolean_t *l2cache, boolean_t *log)
2162 {
2163         char buf[MAXPATHLEN];
2164         char *end;
2165         nvlist_t *nvroot, *search, *ret;
2166         uint64_t guid;
2167
2168         verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2169
2170         guid = strtoull(path, &end, 10);
2171         if (guid != 0 && *end == '\0') {
2172                 verify(nvlist_add_uint64(search, ZPOOL_CONFIG_GUID, guid) == 0);
2173         } else if (zpool_vdev_is_interior(path)) {
2174                 verify(nvlist_add_string(search, ZPOOL_CONFIG_TYPE, path) == 0);
2175         } else if (path[0] != '/') {
2176                 (void) snprintf(buf, sizeof (buf), "%s%s", _PATH_DEV, path);
2177                 verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, buf) == 0);
2178         } else {
2179                 verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, path) == 0);
2180         }
2181
2182         verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE,
2183             &nvroot) == 0);
2184
2185         *avail_spare = B_FALSE;
2186         *l2cache = B_FALSE;
2187         if (log != NULL)
2188                 *log = B_FALSE;
2189         ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log);
2190         nvlist_free(search);
2191
2192         return (ret);
2193 }
2194
2195 static int
2196 vdev_online(nvlist_t *nv)
2197 {
2198         uint64_t ival;
2199
2200         if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, &ival) == 0 ||
2201             nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, &ival) == 0 ||
2202             nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, &ival) == 0)
2203                 return (0);
2204
2205         return (1);
2206 }
2207
2208 /*
2209  * Helper function for zpool_get_physpaths().
2210  */
2211 static int
2212 vdev_get_one_physpath(nvlist_t *config, char *physpath, size_t physpath_size,
2213     size_t *bytes_written)
2214 {
2215         size_t bytes_left, pos, rsz;
2216         char *tmppath;
2217         const char *format;
2218
2219         if (nvlist_lookup_string(config, ZPOOL_CONFIG_PHYS_PATH,
2220             &tmppath) != 0)
2221                 return (EZFS_NODEVICE);
2222
2223         pos = *bytes_written;
2224         bytes_left = physpath_size - pos;
2225         format = (pos == 0) ? "%s" : " %s";
2226
2227         rsz = snprintf(physpath + pos, bytes_left, format, tmppath);
2228         *bytes_written += rsz;
2229
2230         if (rsz >= bytes_left) {
2231                 /* if physpath was not copied properly, clear it */
2232                 if (bytes_left != 0) {
2233                         physpath[pos] = 0;
2234                 }
2235                 return (EZFS_NOSPC);
2236         }
2237         return (0);
2238 }
2239
2240 static int
2241 vdev_get_physpaths(nvlist_t *nv, char *physpath, size_t phypath_size,
2242     size_t *rsz, boolean_t is_spare)
2243 {
2244         char *type;
2245         int ret;
2246
2247         if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
2248                 return (EZFS_INVALCONFIG);
2249
2250         if (strcmp(type, VDEV_TYPE_DISK) == 0) {
2251                 /*
2252                  * An active spare device has ZPOOL_CONFIG_IS_SPARE set.
2253                  * For a spare vdev, we only want to boot from the active
2254                  * spare device.
2255                  */
2256                 if (is_spare) {
2257                         uint64_t spare = 0;
2258                         (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE,
2259                             &spare);
2260                         if (!spare)
2261                                 return (EZFS_INVALCONFIG);
2262                 }
2263
2264                 if (vdev_online(nv)) {
2265                         if ((ret = vdev_get_one_physpath(nv, physpath,
2266                             phypath_size, rsz)) != 0)
2267                                 return (ret);
2268                 }
2269         } else if (strcmp(type, VDEV_TYPE_MIRROR) == 0 ||
2270             strcmp(type, VDEV_TYPE_REPLACING) == 0 ||
2271             (is_spare = (strcmp(type, VDEV_TYPE_SPARE) == 0))) {
2272                 nvlist_t **child;
2273                 uint_t count;
2274                 int i, ret;
2275
2276                 if (nvlist_lookup_nvlist_array(nv,
2277                     ZPOOL_CONFIG_CHILDREN, &child, &count) != 0)
2278                         return (EZFS_INVALCONFIG);
2279
2280                 for (i = 0; i < count; i++) {
2281                         ret = vdev_get_physpaths(child[i], physpath,
2282                             phypath_size, rsz, is_spare);
2283                         if (ret == EZFS_NOSPC)
2284                                 return (ret);
2285                 }
2286         }
2287
2288         return (EZFS_POOL_INVALARG);
2289 }
2290
2291 /*
2292  * Get phys_path for a root pool config.
2293  * Return 0 on success; non-zero on failure.
2294  */
2295 static int
2296 zpool_get_config_physpath(nvlist_t *config, char *physpath, size_t phypath_size)
2297 {
2298         size_t rsz;
2299         nvlist_t *vdev_root;
2300         nvlist_t **child;
2301         uint_t count;
2302         char *type;
2303
2304         rsz = 0;
2305
2306         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2307             &vdev_root) != 0)
2308                 return (EZFS_INVALCONFIG);
2309
2310         if (nvlist_lookup_string(vdev_root, ZPOOL_CONFIG_TYPE, &type) != 0 ||
2311             nvlist_lookup_nvlist_array(vdev_root, ZPOOL_CONFIG_CHILDREN,
2312             &child, &count) != 0)
2313                 return (EZFS_INVALCONFIG);
2314
2315         /*
2316          * root pool can only have a single top-level vdev.
2317          */
2318         if (strcmp(type, VDEV_TYPE_ROOT) != 0 || count != 1)
2319                 return (EZFS_POOL_INVALARG);
2320
2321         (void) vdev_get_physpaths(child[0], physpath, phypath_size, &rsz,
2322             B_FALSE);
2323
2324         /* No online devices */
2325         if (rsz == 0)
2326                 return (EZFS_NODEVICE);
2327
2328         return (0);
2329 }
2330
2331 /*
2332  * Get phys_path for a root pool
2333  * Return 0 on success; non-zero on failure.
2334  */
2335 int
2336 zpool_get_physpath(zpool_handle_t *zhp, char *physpath, size_t phypath_size)
2337 {
2338         return (zpool_get_config_physpath(zhp->zpool_config, physpath,
2339             phypath_size));
2340 }
2341
2342 /*
2343  * If the device has being dynamically expanded then we need to relabel
2344  * the disk to use the new unallocated space.
2345  */
2346 static int
2347 zpool_relabel_disk(libzfs_handle_t *hdl, const char *name)
2348 {
2349 #ifdef illumos
2350         char path[MAXPATHLEN];
2351         char errbuf[1024];
2352         int fd, error;
2353         int (*_efi_use_whole_disk)(int);
2354
2355         if ((_efi_use_whole_disk = (int (*)(int))dlsym(RTLD_DEFAULT,
2356             "efi_use_whole_disk")) == NULL)
2357                 return (-1);
2358
2359         (void) snprintf(path, sizeof (path), "%s/%s", ZFS_RDISK_ROOT, name);
2360
2361         if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) {
2362                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot "
2363                     "relabel '%s': unable to open device"), name);
2364                 return (zfs_error(hdl, EZFS_OPENFAILED, errbuf));
2365         }
2366
2367         /*
2368          * It's possible that we might encounter an error if the device
2369          * does not have any unallocated space left. If so, we simply
2370          * ignore that error and continue on.
2371          */
2372         error = _efi_use_whole_disk(fd);
2373         (void) close(fd);
2374         if (error && error != VT_ENOSPC) {
2375                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot "
2376                     "relabel '%s': unable to read disk capacity"), name);
2377                 return (zfs_error(hdl, EZFS_NOCAP, errbuf));
2378         }
2379 #endif  /* illumos */
2380         return (0);
2381 }
2382
2383 /*
2384  * Bring the specified vdev online.   The 'flags' parameter is a set of the
2385  * ZFS_ONLINE_* flags.
2386  */
2387 int
2388 zpool_vdev_online(zpool_handle_t *zhp, const char *path, int flags,
2389     vdev_state_t *newstate)
2390 {
2391         zfs_cmd_t zc = { 0 };
2392         char msg[1024];
2393         nvlist_t *tgt;
2394         boolean_t avail_spare, l2cache, islog;
2395         libzfs_handle_t *hdl = zhp->zpool_hdl;
2396
2397         if (flags & ZFS_ONLINE_EXPAND) {
2398                 (void) snprintf(msg, sizeof (msg),
2399                     dgettext(TEXT_DOMAIN, "cannot expand %s"), path);
2400         } else {
2401                 (void) snprintf(msg, sizeof (msg),
2402                     dgettext(TEXT_DOMAIN, "cannot online %s"), path);
2403         }
2404
2405         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2406         if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
2407             &islog)) == NULL)
2408                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
2409
2410         verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
2411
2412         if (avail_spare)
2413                 return (zfs_error(hdl, EZFS_ISSPARE, msg));
2414
2415         if (flags & ZFS_ONLINE_EXPAND ||
2416             zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) {
2417                 char *pathname = NULL;
2418                 uint64_t wholedisk = 0;
2419
2420                 (void) nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_WHOLE_DISK,
2421                     &wholedisk);
2422                 verify(nvlist_lookup_string(tgt, ZPOOL_CONFIG_PATH,
2423                     &pathname) == 0);
2424
2425                 /*
2426                  * XXX - L2ARC 1.0 devices can't support expansion.
2427                  */
2428                 if (l2cache) {
2429                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2430                             "cannot expand cache devices"));
2431                         return (zfs_error(hdl, EZFS_VDEVNOTSUP, msg));
2432                 }
2433
2434                 if (wholedisk) {
2435                         pathname += strlen(ZFS_DISK_ROOT) + 1;
2436                         (void) zpool_relabel_disk(hdl, pathname);
2437                 }
2438         }
2439
2440         zc.zc_cookie = VDEV_STATE_ONLINE;
2441         zc.zc_obj = flags;
2442
2443         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) != 0) {
2444                 if (errno == EINVAL) {
2445                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "was split "
2446                             "from this pool into a new one.  Use '%s' "
2447                             "instead"), "zpool detach");
2448                         return (zfs_error(hdl, EZFS_POSTSPLIT_ONLINE, msg));
2449                 }
2450                 return (zpool_standard_error(hdl, errno, msg));
2451         }
2452
2453         *newstate = zc.zc_cookie;
2454         return (0);
2455 }
2456
2457 /*
2458  * Take the specified vdev offline
2459  */
2460 int
2461 zpool_vdev_offline(zpool_handle_t *zhp, const char *path, boolean_t istmp)
2462 {
2463         zfs_cmd_t zc = { 0 };
2464         char msg[1024];
2465         nvlist_t *tgt;
2466         boolean_t avail_spare, l2cache;
2467         libzfs_handle_t *hdl = zhp->zpool_hdl;
2468
2469         (void) snprintf(msg, sizeof (msg),
2470             dgettext(TEXT_DOMAIN, "cannot offline %s"), path);
2471
2472         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2473         if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
2474             NULL)) == NULL)
2475                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
2476
2477         verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
2478
2479         if (avail_spare)
2480                 return (zfs_error(hdl, EZFS_ISSPARE, msg));
2481
2482         zc.zc_cookie = VDEV_STATE_OFFLINE;
2483         zc.zc_obj = istmp ? ZFS_OFFLINE_TEMPORARY : 0;
2484
2485         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
2486                 return (0);
2487
2488         switch (errno) {
2489         case EBUSY:
2490
2491                 /*
2492                  * There are no other replicas of this device.
2493                  */
2494                 return (zfs_error(hdl, EZFS_NOREPLICAS, msg));
2495
2496         case EEXIST:
2497                 /*
2498                  * The log device has unplayed logs
2499                  */
2500                 return (zfs_error(hdl, EZFS_UNPLAYED_LOGS, msg));
2501
2502         default:
2503                 return (zpool_standard_error(hdl, errno, msg));
2504         }
2505 }
2506
2507 /*
2508  * Mark the given vdev faulted.
2509  */
2510 int
2511 zpool_vdev_fault(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
2512 {
2513         zfs_cmd_t zc = { 0 };
2514         char msg[1024];
2515         libzfs_handle_t *hdl = zhp->zpool_hdl;
2516
2517         (void) snprintf(msg, sizeof (msg),
2518             dgettext(TEXT_DOMAIN, "cannot fault %llu"), guid);
2519
2520         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2521         zc.zc_guid = guid;
2522         zc.zc_cookie = VDEV_STATE_FAULTED;
2523         zc.zc_obj = aux;
2524
2525         if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
2526                 return (0);
2527
2528         switch (errno) {
2529         case EBUSY:
2530
2531                 /*
2532                  * There are no other replicas of this device.
2533                  */
2534                 return (zfs_error(hdl, EZFS_NOREPLICAS, msg));
2535
2536         default:
2537                 return (zpool_standard_error(hdl, errno, msg));
2538         }
2539
2540 }
2541
2542 /*
2543  * Mark the given vdev degraded.
2544  */
2545 int
2546 zpool_vdev_degrade(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux)
2547 {
2548         zfs_cmd_t zc = { 0 };
2549         char msg[1024];
2550         libzfs_handle_t *hdl = zhp->zpool_hdl;
2551
2552         (void) snprintf(msg, sizeof (msg),
2553             dgettext(TEXT_DOMAIN, "cannot degrade %llu"), guid);
2554
2555         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2556         zc.zc_guid = guid;
2557         zc.zc_cookie = VDEV_STATE_DEGRADED;
2558         zc.zc_obj = aux;
2559
2560         if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0)
2561                 return (0);
2562
2563         return (zpool_standard_error(hdl, errno, msg));
2564 }
2565
2566 /*
2567  * Returns TRUE if the given nvlist is a vdev that was originally swapped in as
2568  * a hot spare.
2569  */
2570 static boolean_t
2571 is_replacing_spare(nvlist_t *search, nvlist_t *tgt, int which)
2572 {
2573         nvlist_t **child;
2574         uint_t c, children;
2575         char *type;
2576
2577         if (nvlist_lookup_nvlist_array(search, ZPOOL_CONFIG_CHILDREN, &child,
2578             &children) == 0) {
2579                 verify(nvlist_lookup_string(search, ZPOOL_CONFIG_TYPE,
2580                     &type) == 0);
2581
2582                 if (strcmp(type, VDEV_TYPE_SPARE) == 0 &&
2583                     children == 2 && child[which] == tgt)
2584                         return (B_TRUE);
2585
2586                 for (c = 0; c < children; c++)
2587                         if (is_replacing_spare(child[c], tgt, which))
2588                                 return (B_TRUE);
2589         }
2590
2591         return (B_FALSE);
2592 }
2593
2594 /*
2595  * Attach new_disk (fully described by nvroot) to old_disk.
2596  * If 'replacing' is specified, the new disk will replace the old one.
2597  */
2598 int
2599 zpool_vdev_attach(zpool_handle_t *zhp,
2600     const char *old_disk, const char *new_disk, nvlist_t *nvroot, int replacing)
2601 {
2602         zfs_cmd_t zc = { 0 };
2603         char msg[1024];
2604         int ret;
2605         nvlist_t *tgt;
2606         boolean_t avail_spare, l2cache, islog;
2607         uint64_t val;
2608         char *newname;
2609         nvlist_t **child;
2610         uint_t children;
2611         nvlist_t *config_root;
2612         libzfs_handle_t *hdl = zhp->zpool_hdl;
2613         boolean_t rootpool = zpool_is_bootable(zhp);
2614
2615         if (replacing)
2616                 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
2617                     "cannot replace %s with %s"), old_disk, new_disk);
2618         else
2619                 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN,
2620                     "cannot attach %s to %s"), new_disk, old_disk);
2621
2622         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2623         if ((tgt = zpool_find_vdev(zhp, old_disk, &avail_spare, &l2cache,
2624             &islog)) == 0)
2625                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
2626
2627         if (avail_spare)
2628                 return (zfs_error(hdl, EZFS_ISSPARE, msg));
2629
2630         if (l2cache)
2631                 return (zfs_error(hdl, EZFS_ISL2CACHE, msg));
2632
2633         verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
2634         zc.zc_cookie = replacing;
2635
2636         if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
2637             &child, &children) != 0 || children != 1) {
2638                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2639                     "new device must be a single disk"));
2640                 return (zfs_error(hdl, EZFS_INVALCONFIG, msg));
2641         }
2642
2643         verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
2644             ZPOOL_CONFIG_VDEV_TREE, &config_root) == 0);
2645
2646         if ((newname = zpool_vdev_name(NULL, NULL, child[0], B_FALSE)) == NULL)
2647                 return (-1);
2648
2649         /*
2650          * If the target is a hot spare that has been swapped in, we can only
2651          * replace it with another hot spare.
2652          */
2653         if (replacing &&
2654             nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_IS_SPARE, &val) == 0 &&
2655             (zpool_find_vdev(zhp, newname, &avail_spare, &l2cache,
2656             NULL) == NULL || !avail_spare) &&
2657             is_replacing_spare(config_root, tgt, 1)) {
2658                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2659                     "can only be replaced by another hot spare"));
2660                 free(newname);
2661                 return (zfs_error(hdl, EZFS_BADTARGET, msg));
2662         }
2663
2664         free(newname);
2665
2666         if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0)
2667                 return (-1);
2668
2669         ret = zfs_ioctl(hdl, ZFS_IOC_VDEV_ATTACH, &zc);
2670
2671         zcmd_free_nvlists(&zc);
2672
2673         if (ret == 0) {
2674                 if (rootpool) {
2675                         /*
2676                          * XXX need a better way to prevent user from
2677                          * booting up a half-baked vdev.
2678                          */
2679                         (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Make "
2680                             "sure to wait until resilver is done "
2681                             "before rebooting.\n"));
2682                         (void) fprintf(stderr, "\n");
2683                         (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "If "
2684                             "you boot from pool '%s', you may need to update\n"
2685                             "boot code on newly attached disk '%s'.\n\n"
2686                             "Assuming you use GPT partitioning and 'da0' is "
2687                             "your new boot disk\n"
2688                             "you may use the following command:\n\n"
2689                             "\tgpart bootcode -b /boot/pmbr -p "
2690                             "/boot/gptzfsboot -i 1 da0\n\n"),
2691                             zhp->zpool_name, new_disk);
2692                 }
2693                 return (0);
2694         }
2695
2696         switch (errno) {
2697         case ENOTSUP:
2698                 /*
2699                  * Can't attach to or replace this type of vdev.
2700                  */
2701                 if (replacing) {
2702                         uint64_t version = zpool_get_prop_int(zhp,
2703                             ZPOOL_PROP_VERSION, NULL);
2704
2705                         if (islog)
2706                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2707                                     "cannot replace a log with a spare"));
2708                         else if (version >= SPA_VERSION_MULTI_REPLACE)
2709                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2710                                     "already in replacing/spare config; wait "
2711                                     "for completion or use 'zpool detach'"));
2712                         else
2713                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2714                                     "cannot replace a replacing device"));
2715                 } else {
2716                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2717                             "can only attach to mirrors and top-level "
2718                             "disks"));
2719                 }
2720                 (void) zfs_error(hdl, EZFS_BADTARGET, msg);
2721                 break;
2722
2723         case EINVAL:
2724                 /*
2725                  * The new device must be a single disk.
2726                  */
2727                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2728                     "new device must be a single disk"));
2729                 (void) zfs_error(hdl, EZFS_INVALCONFIG, msg);
2730                 break;
2731
2732         case EBUSY:
2733                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "%s is busy"),
2734                     new_disk);
2735                 (void) zfs_error(hdl, EZFS_BADDEV, msg);
2736                 break;
2737
2738         case EOVERFLOW:
2739                 /*
2740                  * The new device is too small.
2741                  */
2742                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2743                     "device is too small"));
2744                 (void) zfs_error(hdl, EZFS_BADDEV, msg);
2745                 break;
2746
2747         case EDOM:
2748                 /*
2749                  * The new device has a different alignment requirement.
2750                  */
2751                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2752                     "devices have different sector alignment"));
2753                 (void) zfs_error(hdl, EZFS_BADDEV, msg);
2754                 break;
2755
2756         case ENAMETOOLONG:
2757                 /*
2758                  * The resulting top-level vdev spec won't fit in the label.
2759                  */
2760                 (void) zfs_error(hdl, EZFS_DEVOVERFLOW, msg);
2761                 break;
2762
2763         default:
2764                 (void) zpool_standard_error(hdl, errno, msg);
2765         }
2766
2767         return (-1);
2768 }
2769
2770 /*
2771  * Detach the specified device.
2772  */
2773 int
2774 zpool_vdev_detach(zpool_handle_t *zhp, const char *path)
2775 {
2776         zfs_cmd_t zc = { 0 };
2777         char msg[1024];
2778         nvlist_t *tgt;
2779         boolean_t avail_spare, l2cache;
2780         libzfs_handle_t *hdl = zhp->zpool_hdl;
2781
2782         (void) snprintf(msg, sizeof (msg),
2783             dgettext(TEXT_DOMAIN, "cannot detach %s"), path);
2784
2785         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
2786         if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
2787             NULL)) == 0)
2788                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
2789
2790         if (avail_spare)
2791                 return (zfs_error(hdl, EZFS_ISSPARE, msg));
2792
2793         if (l2cache)
2794                 return (zfs_error(hdl, EZFS_ISL2CACHE, msg));
2795
2796         verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
2797
2798         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_DETACH, &zc) == 0)
2799                 return (0);
2800
2801         switch (errno) {
2802
2803         case ENOTSUP:
2804                 /*
2805                  * Can't detach from this type of vdev.
2806                  */
2807                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "only "
2808                     "applicable to mirror and replacing vdevs"));
2809                 (void) zfs_error(hdl, EZFS_BADTARGET, msg);
2810                 break;
2811
2812         case EBUSY:
2813                 /*
2814                  * There are no other replicas of this device.
2815                  */
2816                 (void) zfs_error(hdl, EZFS_NOREPLICAS, msg);
2817                 break;
2818
2819         default:
2820                 (void) zpool_standard_error(hdl, errno, msg);
2821         }
2822
2823         return (-1);
2824 }
2825
2826 /*
2827  * Find a mirror vdev in the source nvlist.
2828  *
2829  * The mchild array contains a list of disks in one of the top-level mirrors
2830  * of the source pool.  The schild array contains a list of disks that the
2831  * user specified on the command line.  We loop over the mchild array to
2832  * see if any entry in the schild array matches.
2833  *
2834  * If a disk in the mchild array is found in the schild array, we return
2835  * the index of that entry.  Otherwise we return -1.
2836  */
2837 static int
2838 find_vdev_entry(zpool_handle_t *zhp, nvlist_t **mchild, uint_t mchildren,
2839     nvlist_t **schild, uint_t schildren)
2840 {
2841         uint_t mc;
2842
2843         for (mc = 0; mc < mchildren; mc++) {
2844                 uint_t sc;
2845                 char *mpath = zpool_vdev_name(zhp->zpool_hdl, zhp,
2846                     mchild[mc], B_FALSE);
2847
2848                 for (sc = 0; sc < schildren; sc++) {
2849                         char *spath = zpool_vdev_name(zhp->zpool_hdl, zhp,
2850                             schild[sc], B_FALSE);
2851                         boolean_t result = (strcmp(mpath, spath) == 0);
2852
2853                         free(spath);
2854                         if (result) {
2855                                 free(mpath);
2856                                 return (mc);
2857                         }
2858                 }
2859
2860                 free(mpath);
2861         }
2862
2863         return (-1);
2864 }
2865
2866 /*
2867  * Split a mirror pool.  If newroot points to null, then a new nvlist
2868  * is generated and it is the responsibility of the caller to free it.
2869  */
2870 int
2871 zpool_vdev_split(zpool_handle_t *zhp, char *newname, nvlist_t **newroot,
2872     nvlist_t *props, splitflags_t flags)
2873 {
2874         zfs_cmd_t zc = { 0 };
2875         char msg[1024];
2876         nvlist_t *tree, *config, **child, **newchild, *newconfig = NULL;
2877         nvlist_t **varray = NULL, *zc_props = NULL;
2878         uint_t c, children, newchildren, lastlog = 0, vcount, found = 0;
2879         libzfs_handle_t *hdl = zhp->zpool_hdl;
2880         uint64_t vers;
2881         boolean_t freelist = B_FALSE, memory_err = B_TRUE;
2882         int retval = 0;
2883
2884         (void) snprintf(msg, sizeof (msg),
2885             dgettext(TEXT_DOMAIN, "Unable to split %s"), zhp->zpool_name);
2886
2887         if (!zpool_name_valid(hdl, B_FALSE, newname))
2888                 return (zfs_error(hdl, EZFS_INVALIDNAME, msg));
2889
2890         if ((config = zpool_get_config(zhp, NULL)) == NULL) {
2891                 (void) fprintf(stderr, gettext("Internal error: unable to "
2892                     "retrieve pool configuration\n"));
2893                 return (-1);
2894         }
2895
2896         verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree)
2897             == 0);
2898         verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &vers) == 0);
2899
2900         if (props) {
2901                 prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE };
2902                 if ((zc_props = zpool_valid_proplist(hdl, zhp->zpool_name,
2903                     props, vers, flags, msg)) == NULL)
2904                         return (-1);
2905         }
2906
2907         if (nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, &child,
2908             &children) != 0) {
2909                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2910                     "Source pool is missing vdev tree"));
2911                 nvlist_free(zc_props);
2912                 return (-1);
2913         }
2914
2915         varray = zfs_alloc(hdl, children * sizeof (nvlist_t *));
2916         vcount = 0;
2917
2918         if (*newroot == NULL ||
2919             nvlist_lookup_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN,
2920             &newchild, &newchildren) != 0)
2921                 newchildren = 0;
2922
2923         for (c = 0; c < children; c++) {
2924                 uint64_t is_log = B_FALSE, is_hole = B_FALSE;
2925                 char *type;
2926                 nvlist_t **mchild, *vdev;
2927                 uint_t mchildren;
2928                 int entry;
2929
2930                 /*
2931                  * Unlike cache & spares, slogs are stored in the
2932                  * ZPOOL_CONFIG_CHILDREN array.  We filter them out here.
2933                  */
2934                 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
2935                     &is_log);
2936                 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
2937                     &is_hole);
2938                 if (is_log || is_hole) {
2939                         /*
2940                          * Create a hole vdev and put it in the config.
2941                          */
2942                         if (nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) != 0)
2943                                 goto out;
2944                         if (nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE,
2945                             VDEV_TYPE_HOLE) != 0)
2946                                 goto out;
2947                         if (nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_HOLE,
2948                             1) != 0)
2949                                 goto out;
2950                         if (lastlog == 0)
2951                                 lastlog = vcount;
2952                         varray[vcount++] = vdev;
2953                         continue;
2954                 }
2955                 lastlog = 0;
2956                 verify(nvlist_lookup_string(child[c], ZPOOL_CONFIG_TYPE, &type)
2957                     == 0);
2958                 if (strcmp(type, VDEV_TYPE_MIRROR) != 0) {
2959                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2960                             "Source pool must be composed only of mirrors\n"));
2961                         retval = zfs_error(hdl, EZFS_INVALCONFIG, msg);
2962                         goto out;
2963                 }
2964
2965                 verify(nvlist_lookup_nvlist_array(child[c],
2966                     ZPOOL_CONFIG_CHILDREN, &mchild, &mchildren) == 0);
2967
2968                 /* find or add an entry for this top-level vdev */
2969                 if (newchildren > 0 &&
2970                     (entry = find_vdev_entry(zhp, mchild, mchildren,
2971                     newchild, newchildren)) >= 0) {
2972                         /* We found a disk that the user specified. */
2973                         vdev = mchild[entry];
2974                         ++found;
2975                 } else {
2976                         /* User didn't specify a disk for this vdev. */
2977                         vdev = mchild[mchildren - 1];
2978                 }
2979
2980                 if (nvlist_dup(vdev, &varray[vcount++], 0) != 0)
2981                         goto out;
2982         }
2983
2984         /* did we find every disk the user specified? */
2985         if (found != newchildren) {
2986                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Device list must "
2987                     "include at most one disk from each mirror"));
2988                 retval = zfs_error(hdl, EZFS_INVALCONFIG, msg);
2989                 goto out;
2990         }
2991
2992         /* Prepare the nvlist for populating. */
2993         if (*newroot == NULL) {
2994                 if (nvlist_alloc(newroot, NV_UNIQUE_NAME, 0) != 0)
2995                         goto out;
2996                 freelist = B_TRUE;
2997                 if (nvlist_add_string(*newroot, ZPOOL_CONFIG_TYPE,
2998                     VDEV_TYPE_ROOT) != 0)
2999                         goto out;
3000         } else {
3001                 verify(nvlist_remove_all(*newroot, ZPOOL_CONFIG_CHILDREN) == 0);
3002         }
3003
3004         /* Add all the children we found */
3005         if (nvlist_add_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN, varray,
3006             lastlog == 0 ? vcount : lastlog) != 0)
3007                 goto out;
3008
3009         /*
3010          * If we're just doing a dry run, exit now with success.
3011          */
3012         if (flags.dryrun) {
3013                 memory_err = B_FALSE;
3014                 freelist = B_FALSE;
3015                 goto out;
3016         }
3017
3018         /* now build up the config list & call the ioctl */
3019         if (nvlist_alloc(&newconfig, NV_UNIQUE_NAME, 0) != 0)
3020                 goto out;
3021
3022         if (nvlist_add_nvlist(newconfig,
3023             ZPOOL_CONFIG_VDEV_TREE, *newroot) != 0 ||
3024             nvlist_add_string(newconfig,
3025             ZPOOL_CONFIG_POOL_NAME, newname) != 0 ||
3026             nvlist_add_uint64(newconfig, ZPOOL_CONFIG_VERSION, vers) != 0)
3027                 goto out;
3028
3029         /*
3030          * The new pool is automatically part of the namespace unless we
3031          * explicitly export it.
3032          */
3033         if (!flags.import)
3034                 zc.zc_cookie = ZPOOL_EXPORT_AFTER_SPLIT;
3035         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3036         (void) strlcpy(zc.zc_string, newname, sizeof (zc.zc_string));
3037         if (zcmd_write_conf_nvlist(hdl, &zc, newconfig) != 0)
3038                 goto out;
3039         if (zc_props != NULL && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0)
3040                 goto out;
3041
3042         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SPLIT, &zc) != 0) {
3043                 retval = zpool_standard_error(hdl, errno, msg);
3044                 goto out;
3045         }
3046
3047         freelist = B_FALSE;
3048         memory_err = B_FALSE;
3049
3050 out:
3051         if (varray != NULL) {
3052                 int v;
3053
3054                 for (v = 0; v < vcount; v++)
3055                         nvlist_free(varray[v]);
3056                 free(varray);
3057         }
3058         zcmd_free_nvlists(&zc);
3059         nvlist_free(zc_props);
3060         nvlist_free(newconfig);
3061         if (freelist) {
3062                 nvlist_free(*newroot);
3063                 *newroot = NULL;
3064         }
3065
3066         if (retval != 0)
3067                 return (retval);
3068
3069         if (memory_err)
3070                 return (no_memory(hdl));
3071
3072         return (0);
3073 }
3074
3075 /*
3076  * Remove the given device.  Currently, this is supported only for hot spares
3077  * and level 2 cache devices.
3078  */
3079 int
3080 zpool_vdev_remove(zpool_handle_t *zhp, const char *path)
3081 {
3082         zfs_cmd_t zc = { 0 };
3083         char msg[1024];
3084         nvlist_t *tgt;
3085         boolean_t avail_spare, l2cache, islog;
3086         libzfs_handle_t *hdl = zhp->zpool_hdl;
3087         uint64_t version;
3088
3089         (void) snprintf(msg, sizeof (msg),
3090             dgettext(TEXT_DOMAIN, "cannot remove %s"), path);
3091
3092         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3093         if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache,
3094             &islog)) == 0)
3095                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
3096         /*
3097          * XXX - this should just go away.
3098          */
3099         if (!avail_spare && !l2cache && !islog) {
3100                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3101                     "only inactive hot spares, cache, top-level, "
3102                     "or log devices can be removed"));
3103                 return (zfs_error(hdl, EZFS_NODEVICE, msg));
3104         }
3105
3106         version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL);
3107         if (islog && version < SPA_VERSION_HOLES) {
3108                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3109                     "pool must be upgrade to support log removal"));
3110                 return (zfs_error(hdl, EZFS_BADVERSION, msg));
3111         }
3112
3113         verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0);
3114
3115         if (zfs_ioctl(hdl, ZFS_IOC_VDEV_REMOVE, &zc) == 0)
3116                 return (0);
3117
3118         return (zpool_standard_error(hdl, errno, msg));
3119 }
3120
3121 /*
3122  * Clear the errors for the pool, or the particular device if specified.
3123  */
3124 int
3125 zpool_clear(zpool_handle_t *zhp, const char *path, nvlist_t *rewindnvl)
3126 {
3127         zfs_cmd_t zc = { 0 };
3128         char msg[1024];
3129         nvlist_t *tgt;
3130         zpool_rewind_policy_t policy;
3131         boolean_t avail_spare, l2cache;
3132         libzfs_handle_t *hdl = zhp->zpool_hdl;
3133         nvlist_t *nvi = NULL;
3134         int error;
3135
3136         if (path)
3137                 (void) snprintf(msg, sizeof (msg),
3138                     dgettext(TEXT_DOMAIN, "cannot clear errors for %s"),
3139                     path);
3140         else
3141                 (void) snprintf(msg, sizeof (msg),
3142                     dgettext(TEXT_DOMAIN, "cannot clear errors for %s"),
3143                     zhp->zpool_name);
3144
3145         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3146         if (path) {
3147                 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare,
3148                     &l2cache, NULL)) == 0)
3149                         return (zfs_error(hdl, EZFS_NODEVICE, msg));
3150
3151                 /*
3152                  * Don't allow error clearing for hot spares.  Do allow
3153                  * error clearing for l2cache devices.
3154                  */
3155                 if (avail_spare)
3156                         return (zfs_error(hdl, EZFS_ISSPARE, msg));
3157
3158                 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID,
3159                     &zc.zc_guid) == 0);
3160         }
3161
3162         zpool_get_rewind_policy(rewindnvl, &policy);
3163         zc.zc_cookie = policy.zrp_request;
3164
3165         if (zcmd_alloc_dst_nvlist(hdl, &zc, zhp->zpool_config_size * 2) != 0)
3166                 return (-1);
3167
3168         if (zcmd_write_src_nvlist(hdl, &zc, rewindnvl) != 0)
3169                 return (-1);
3170
3171         while ((error = zfs_ioctl(hdl, ZFS_IOC_CLEAR, &zc)) != 0 &&
3172             errno == ENOMEM) {
3173                 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
3174                         zcmd_free_nvlists(&zc);
3175                         return (-1);
3176                 }
3177         }
3178
3179         if (!error || ((policy.zrp_request & ZPOOL_TRY_REWIND) &&
3180             errno != EPERM && errno != EACCES)) {
3181                 if (policy.zrp_request &
3182                     (ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) {
3183                         (void) zcmd_read_dst_nvlist(hdl, &zc, &nvi);
3184                         zpool_rewind_exclaim(hdl, zc.zc_name,
3185                             ((policy.zrp_request & ZPOOL_TRY_REWIND) != 0),
3186                             nvi);
3187                         nvlist_free(nvi);
3188                 }
3189                 zcmd_free_nvlists(&zc);
3190                 return (0);
3191         }
3192
3193         zcmd_free_nvlists(&zc);
3194         return (zpool_standard_error(hdl, errno, msg));
3195 }
3196
3197 /*
3198  * Similar to zpool_clear(), but takes a GUID (used by fmd).
3199  */
3200 int
3201 zpool_vdev_clear(zpool_handle_t *zhp, uint64_t guid)
3202 {
3203         zfs_cmd_t zc = { 0 };
3204         char msg[1024];
3205         libzfs_handle_t *hdl = zhp->zpool_hdl;
3206
3207         (void) snprintf(msg, sizeof (msg),
3208             dgettext(TEXT_DOMAIN, "cannot clear errors for %llx"),
3209             guid);
3210
3211         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3212         zc.zc_guid = guid;
3213         zc.zc_cookie = ZPOOL_NO_REWIND;
3214
3215         if (ioctl(hdl->libzfs_fd, ZFS_IOC_CLEAR, &zc) == 0)
3216                 return (0);
3217
3218         return (zpool_standard_error(hdl, errno, msg));
3219 }
3220
3221 /*
3222  * Change the GUID for a pool.
3223  */
3224 int
3225 zpool_reguid(zpool_handle_t *zhp)
3226 {
3227         char msg[1024];
3228         libzfs_handle_t *hdl = zhp->zpool_hdl;
3229         zfs_cmd_t zc = { 0 };
3230
3231         (void) snprintf(msg, sizeof (msg),
3232             dgettext(TEXT_DOMAIN, "cannot reguid '%s'"), zhp->zpool_name);
3233
3234         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3235         if (zfs_ioctl(hdl, ZFS_IOC_POOL_REGUID, &zc) == 0)
3236                 return (0);
3237
3238         return (zpool_standard_error(hdl, errno, msg));
3239 }
3240
3241 /*
3242  * Reopen the pool.
3243  */
3244 int
3245 zpool_reopen(zpool_handle_t *zhp)
3246 {
3247         zfs_cmd_t zc = { 0 };
3248         char msg[1024];
3249         libzfs_handle_t *hdl = zhp->zpool_hdl;
3250
3251         (void) snprintf(msg, sizeof (msg),
3252             dgettext(TEXT_DOMAIN, "cannot reopen '%s'"),
3253             zhp->zpool_name);
3254
3255         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3256         if (zfs_ioctl(hdl, ZFS_IOC_POOL_REOPEN, &zc) == 0)
3257                 return (0);
3258         return (zpool_standard_error(hdl, errno, msg));
3259 }
3260
3261 /*
3262  * Convert from a devid string to a path.
3263  */
3264 static char *
3265 devid_to_path(char *devid_str)
3266 {
3267         ddi_devid_t devid;
3268         char *minor;
3269         char *path;
3270         devid_nmlist_t *list = NULL;
3271         int ret;
3272
3273         if (devid_str_decode(devid_str, &devid, &minor) != 0)
3274                 return (NULL);
3275
3276         ret = devid_deviceid_to_nmlist("/dev", devid, minor, &list);
3277
3278         devid_str_free(minor);
3279         devid_free(devid);
3280
3281         if (ret != 0)
3282                 return (NULL);
3283
3284         /*
3285          * In a case the strdup() fails, we will just return NULL below.
3286          */
3287         path = strdup(list[0].devname);
3288
3289         devid_free_nmlist(list);
3290
3291         return (path);
3292 }
3293
3294 /*
3295  * Convert from a path to a devid string.
3296  */
3297 static char *
3298 path_to_devid(const char *path)
3299 {
3300 #ifdef have_devid
3301         int fd;
3302         ddi_devid_t devid;
3303         char *minor, *ret;
3304
3305         if ((fd = open(path, O_RDONLY)) < 0)
3306                 return (NULL);
3307
3308         minor = NULL;
3309         ret = NULL;
3310         if (devid_get(fd, &devid) == 0) {
3311                 if (devid_get_minor_name(fd, &minor) == 0)
3312                         ret = devid_str_encode(devid, minor);
3313                 if (minor != NULL)
3314                         devid_str_free(minor);
3315                 devid_free(devid);
3316         }
3317         (void) close(fd);
3318
3319         return (ret);
3320 #else
3321         return (NULL);
3322 #endif
3323 }
3324
3325 /*
3326  * Issue the necessary ioctl() to update the stored path value for the vdev.  We
3327  * ignore any failure here, since a common case is for an unprivileged user to
3328  * type 'zpool status', and we'll display the correct information anyway.
3329  */
3330 static void
3331 set_path(zpool_handle_t *zhp, nvlist_t *nv, const char *path)
3332 {
3333         zfs_cmd_t zc = { 0 };
3334
3335         (void) strncpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3336         (void) strncpy(zc.zc_value, path, sizeof (zc.zc_value));
3337         verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
3338             &zc.zc_guid) == 0);
3339
3340         (void) ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_VDEV_SETPATH, &zc);
3341 }
3342
3343 /*
3344  * Given a vdev, return the name to display in iostat.  If the vdev has a path,
3345  * we use that, stripping off any leading "/dev/dsk/"; if not, we use the type.
3346  * We also check if this is a whole disk, in which case we strip off the
3347  * trailing 's0' slice name.
3348  *
3349  * This routine is also responsible for identifying when disks have been
3350  * reconfigured in a new location.  The kernel will have opened the device by
3351  * devid, but the path will still refer to the old location.  To catch this, we
3352  * first do a path -> devid translation (which is fast for the common case).  If
3353  * the devid matches, we're done.  If not, we do a reverse devid -> path
3354  * translation and issue the appropriate ioctl() to update the path of the vdev.
3355  * If 'zhp' is NULL, then this is an exported pool, and we don't need to do any
3356  * of these checks.
3357  */
3358 char *
3359 zpool_vdev_name(libzfs_handle_t *hdl, zpool_handle_t *zhp, nvlist_t *nv,
3360     boolean_t verbose)
3361 {
3362         char *path, *devid;
3363         uint64_t value;
3364         char buf[64];
3365         vdev_stat_t *vs;
3366         uint_t vsc;
3367         int have_stats;
3368         int have_path;
3369
3370         have_stats = nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS,
3371             (uint64_t **)&vs, &vsc) == 0;
3372         have_path = nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0;
3373
3374         /*
3375          * If the device is not currently present, assume it will not
3376          * come back at the same device path.  Display the device by GUID.
3377          */
3378         if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, &value) == 0 ||
3379             have_path && have_stats && vs->vs_state <= VDEV_STATE_CANT_OPEN) {
3380                 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID,
3381                     &value) == 0);
3382                 (void) snprintf(buf, sizeof (buf), "%llu",
3383                     (u_longlong_t)value);
3384                 path = buf;
3385         } else if (have_path) {
3386
3387                 /*
3388                  * If the device is dead (faulted, offline, etc) then don't
3389                  * bother opening it.  Otherwise we may be forcing the user to
3390                  * open a misbehaving device, which can have undesirable
3391                  * effects.
3392                  */
3393                 if ((have_stats == 0 ||
3394                     vs->vs_state >= VDEV_STATE_DEGRADED) &&
3395                     zhp != NULL &&
3396                     nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &devid) == 0) {
3397                         /*
3398                          * Determine if the current path is correct.
3399                          */
3400                         char *newdevid = path_to_devid(path);
3401
3402                         if (newdevid == NULL ||
3403                             strcmp(devid, newdevid) != 0) {
3404                                 char *newpath;
3405
3406                                 if ((newpath = devid_to_path(devid)) != NULL) {
3407                                         /*
3408                                          * Update the path appropriately.
3409                                          */
3410                                         set_path(zhp, nv, newpath);
3411                                         if (nvlist_add_string(nv,
3412                                             ZPOOL_CONFIG_PATH, newpath) == 0)
3413                                                 verify(nvlist_lookup_string(nv,
3414                                                     ZPOOL_CONFIG_PATH,
3415                                                     &path) == 0);
3416                                         free(newpath);
3417                                 }
3418                         }
3419
3420                         if (newdevid)
3421                                 devid_str_free(newdevid);
3422                 }
3423
3424 #ifdef illumos
3425                 if (strncmp(path, ZFS_DISK_ROOTD, strlen(ZFS_DISK_ROOTD)) == 0)
3426                         path += strlen(ZFS_DISK_ROOTD);
3427
3428                 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
3429                     &value) == 0 && value) {
3430                         int pathlen = strlen(path);
3431                         char *tmp = zfs_strdup(hdl, path);
3432
3433                         /*
3434                          * If it starts with c#, and ends with "s0", chop
3435                          * the "s0" off, or if it ends with "s0/old", remove
3436                          * the "s0" from the middle.
3437                          */
3438                         if (CTD_CHECK(tmp)) {
3439                                 if (strcmp(&tmp[pathlen - 2], "s0") == 0) {
3440                                         tmp[pathlen - 2] = '\0';
3441                                 } else if (pathlen > 6 &&
3442                                     strcmp(&tmp[pathlen - 6], "s0/old") == 0) {
3443                                         (void) strcpy(&tmp[pathlen - 6],
3444                                             "/old");
3445                                 }
3446                         }
3447                         return (tmp);
3448                 }
3449 #else   /* !illumos */
3450                 if (strncmp(path, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
3451                         path += sizeof(_PATH_DEV) - 1;
3452 #endif  /* illumos */
3453         } else {
3454                 verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &path) == 0);
3455
3456                 /*
3457                  * If it's a raidz device, we need to stick in the parity level.
3458                  */
3459                 if (strcmp(path, VDEV_TYPE_RAIDZ) == 0) {
3460                         verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY,
3461                             &value) == 0);
3462                         (void) snprintf(buf, sizeof (buf), "%s%llu", path,
3463                             (u_longlong_t)value);
3464                         path = buf;
3465                 }
3466
3467                 /*
3468                  * We identify each top-level vdev by using a <type-id>
3469                  * naming convention.
3470                  */
3471                 if (verbose) {
3472                         uint64_t id;
3473
3474                         verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID,
3475                             &id) == 0);
3476                         (void) snprintf(buf, sizeof (buf), "%s-%llu", path,
3477                             (u_longlong_t)id);
3478                         path = buf;
3479                 }
3480         }
3481
3482         return (zfs_strdup(hdl, path));
3483 }
3484
3485 static int
3486 zbookmark_mem_compare(const void *a, const void *b)
3487 {
3488         return (memcmp(a, b, sizeof (zbookmark_phys_t)));
3489 }
3490
3491 /*
3492  * Retrieve the persistent error log, uniquify the members, and return to the
3493  * caller.
3494  */
3495 int
3496 zpool_get_errlog(zpool_handle_t *zhp, nvlist_t **nverrlistp)
3497 {
3498         zfs_cmd_t zc = { 0 };
3499         uint64_t count;
3500         zbookmark_phys_t *zb = NULL;
3501         int i;
3502
3503         /*
3504          * Retrieve the raw error list from the kernel.  If the number of errors
3505          * has increased, allocate more space and continue until we get the
3506          * entire list.
3507          */
3508         verify(nvlist_lookup_uint64(zhp->zpool_config, ZPOOL_CONFIG_ERRCOUNT,
3509             &count) == 0);
3510         if (count == 0)
3511                 return (0);
3512         if ((zc.zc_nvlist_dst = (uintptr_t)zfs_alloc(zhp->zpool_hdl,
3513             count * sizeof (zbookmark_phys_t))) == (uintptr_t)NULL)
3514                 return (-1);
3515         zc.zc_nvlist_dst_size = count;
3516         (void) strcpy(zc.zc_name, zhp->zpool_name);
3517         for (;;) {
3518                 if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_ERROR_LOG,
3519                     &zc) != 0) {
3520                         free((void *)(uintptr_t)zc.zc_nvlist_dst);
3521                         if (errno == ENOMEM) {
3522                                 void *dst;
3523
3524                                 count = zc.zc_nvlist_dst_size;
3525                                 dst = zfs_alloc(zhp->zpool_hdl, count *
3526                                     sizeof (zbookmark_phys_t));
3527                                 if (dst == NULL)
3528                                         return (-1);
3529                                 zc.zc_nvlist_dst = (uintptr_t)dst;
3530                         } else {
3531                                 return (-1);
3532                         }
3533                 } else {
3534                         break;
3535                 }
3536         }
3537
3538         /*
3539          * Sort the resulting bookmarks.  This is a little confusing due to the
3540          * implementation of ZFS_IOC_ERROR_LOG.  The bookmarks are copied last
3541          * to first, and 'zc_nvlist_dst_size' indicates the number of boomarks
3542          * _not_ copied as part of the process.  So we point the start of our
3543          * array appropriate and decrement the total number of elements.
3544          */
3545         zb = ((zbookmark_phys_t *)(uintptr_t)zc.zc_nvlist_dst) +
3546             zc.zc_nvlist_dst_size;
3547         count -= zc.zc_nvlist_dst_size;
3548
3549         qsort(zb, count, sizeof (zbookmark_phys_t), zbookmark_mem_compare);
3550
3551         verify(nvlist_alloc(nverrlistp, 0, KM_SLEEP) == 0);
3552
3553         /*
3554          * Fill in the nverrlistp with nvlist's of dataset and object numbers.
3555          */
3556         for (i = 0; i < count; i++) {
3557                 nvlist_t *nv;
3558
3559                 /* ignoring zb_blkid and zb_level for now */
3560                 if (i > 0 && zb[i-1].zb_objset == zb[i].zb_objset &&
3561                     zb[i-1].zb_object == zb[i].zb_object)
3562                         continue;
3563
3564                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) != 0)
3565                         goto nomem;
3566                 if (nvlist_add_uint64(nv, ZPOOL_ERR_DATASET,
3567                     zb[i].zb_objset) != 0) {
3568                         nvlist_free(nv);
3569                         goto nomem;
3570                 }
3571                 if (nvlist_add_uint64(nv, ZPOOL_ERR_OBJECT,
3572                     zb[i].zb_object) != 0) {
3573                         nvlist_free(nv);
3574                         goto nomem;
3575                 }
3576                 if (nvlist_add_nvlist(*nverrlistp, "ejk", nv) != 0) {
3577                         nvlist_free(nv);
3578                         goto nomem;
3579                 }
3580                 nvlist_free(nv);
3581         }
3582
3583         free((void *)(uintptr_t)zc.zc_nvlist_dst);
3584         return (0);
3585
3586 nomem:
3587         free((void *)(uintptr_t)zc.zc_nvlist_dst);
3588         return (no_memory(zhp->zpool_hdl));
3589 }
3590
3591 /*
3592  * Upgrade a ZFS pool to the latest on-disk version.
3593  */
3594 int
3595 zpool_upgrade(zpool_handle_t *zhp, uint64_t new_version)
3596 {
3597         zfs_cmd_t zc = { 0 };
3598         libzfs_handle_t *hdl = zhp->zpool_hdl;
3599
3600         (void) strcpy(zc.zc_name, zhp->zpool_name);
3601         zc.zc_cookie = new_version;
3602
3603         if (zfs_ioctl(hdl, ZFS_IOC_POOL_UPGRADE, &zc) != 0)
3604                 return (zpool_standard_error_fmt(hdl, errno,
3605                     dgettext(TEXT_DOMAIN, "cannot upgrade '%s'"),
3606                     zhp->zpool_name));
3607         return (0);
3608 }
3609
3610 void
3611 zfs_save_arguments(int argc, char **argv, char *string, int len)
3612 {
3613         (void) strlcpy(string, basename(argv[0]), len);
3614         for (int i = 1; i < argc; i++) {
3615                 (void) strlcat(string, " ", len);
3616                 (void) strlcat(string, argv[i], len);
3617         }
3618 }
3619
3620 int
3621 zpool_log_history(libzfs_handle_t *hdl, const char *message)
3622 {
3623         zfs_cmd_t zc = { 0 };
3624         nvlist_t *args;
3625         int err;
3626
3627         args = fnvlist_alloc();
3628         fnvlist_add_string(args, "message", message);
3629         err = zcmd_write_src_nvlist(hdl, &zc, args);
3630         if (err == 0)
3631                 err = ioctl(hdl->libzfs_fd, ZFS_IOC_LOG_HISTORY, &zc);
3632         nvlist_free(args);
3633         zcmd_free_nvlists(&zc);
3634         return (err);
3635 }
3636
3637 /*
3638  * Perform ioctl to get some command history of a pool.
3639  *
3640  * 'buf' is the buffer to fill up to 'len' bytes.  'off' is the
3641  * logical offset of the history buffer to start reading from.
3642  *
3643  * Upon return, 'off' is the next logical offset to read from and
3644  * 'len' is the actual amount of bytes read into 'buf'.
3645  */
3646 static int
3647 get_history(zpool_handle_t *zhp, char *buf, uint64_t *off, uint64_t *len)
3648 {
3649         zfs_cmd_t zc = { 0 };
3650         libzfs_handle_t *hdl = zhp->zpool_hdl;
3651
3652         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3653
3654         zc.zc_history = (uint64_t)(uintptr_t)buf;
3655         zc.zc_history_len = *len;
3656         zc.zc_history_offset = *off;
3657
3658         if (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_HISTORY, &zc) != 0) {
3659                 switch (errno) {
3660                 case EPERM:
3661                         return (zfs_error_fmt(hdl, EZFS_PERM,
3662                             dgettext(TEXT_DOMAIN,
3663                             "cannot show history for pool '%s'"),
3664                             zhp->zpool_name));
3665                 case ENOENT:
3666                         return (zfs_error_fmt(hdl, EZFS_NOHISTORY,
3667                             dgettext(TEXT_DOMAIN, "cannot get history for pool "
3668                             "'%s'"), zhp->zpool_name));
3669                 case ENOTSUP:
3670                         return (zfs_error_fmt(hdl, EZFS_BADVERSION,
3671                             dgettext(TEXT_DOMAIN, "cannot get history for pool "
3672                             "'%s', pool must be upgraded"), zhp->zpool_name));
3673                 default:
3674                         return (zpool_standard_error_fmt(hdl, errno,
3675                             dgettext(TEXT_DOMAIN,
3676                             "cannot get history for '%s'"), zhp->zpool_name));
3677                 }
3678         }
3679
3680         *len = zc.zc_history_len;
3681         *off = zc.zc_history_offset;
3682
3683         return (0);
3684 }
3685
3686 /*
3687  * Process the buffer of nvlists, unpacking and storing each nvlist record
3688  * into 'records'.  'leftover' is set to the number of bytes that weren't
3689  * processed as there wasn't a complete record.
3690  */
3691 int
3692 zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover,
3693     nvlist_t ***records, uint_t *numrecords)
3694 {
3695         uint64_t reclen;
3696         nvlist_t *nv;
3697         int i;
3698
3699         while (bytes_read > sizeof (reclen)) {
3700
3701                 /* get length of packed record (stored as little endian) */
3702                 for (i = 0, reclen = 0; i < sizeof (reclen); i++)
3703                         reclen += (uint64_t)(((uchar_t *)buf)[i]) << (8*i);
3704
3705                 if (bytes_read < sizeof (reclen) + reclen)
3706                         break;
3707
3708                 /* unpack record */
3709                 if (nvlist_unpack(buf + sizeof (reclen), reclen, &nv, 0) != 0)
3710                         return (ENOMEM);
3711                 bytes_read -= sizeof (reclen) + reclen;
3712                 buf += sizeof (reclen) + reclen;
3713
3714                 /* add record to nvlist array */
3715                 (*numrecords)++;
3716                 if (ISP2(*numrecords + 1)) {
3717                         *records = realloc(*records,
3718                             *numrecords * 2 * sizeof (nvlist_t *));
3719                 }
3720                 (*records)[*numrecords - 1] = nv;
3721         }
3722
3723         *leftover = bytes_read;
3724         return (0);
3725 }
3726
3727 /* from spa_history.c: spa_history_create_obj() */
3728 #define HIS_BUF_LEN_DEF (128 << 10)
3729 #define HIS_BUF_LEN_MAX (1 << 30)
3730
3731 /*
3732  * Retrieve the command history of a pool.
3733  */
3734 int
3735 zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp)
3736 {
3737         char *buf;
3738         uint64_t buflen = HIS_BUF_LEN_DEF;
3739         uint64_t off = 0;
3740         nvlist_t **records = NULL;
3741         uint_t numrecords = 0;
3742         int err, i;
3743
3744         buf = malloc(buflen);
3745         if (buf == NULL)
3746                 return (ENOMEM);
3747         do {
3748                 uint64_t bytes_read = buflen;
3749                 uint64_t leftover;
3750
3751                 if ((err = get_history(zhp, buf, &off, &bytes_read)) != 0)
3752                         break;
3753
3754                 /* if nothing else was read in, we're at EOF, just return */
3755                 if (bytes_read == 0)
3756                         break;
3757
3758                 if ((err = zpool_history_unpack(buf, bytes_read,
3759                     &leftover, &records, &numrecords)) != 0)
3760                         break;
3761                 off -= leftover;
3762                 if (leftover == bytes_read) {
3763                         /*
3764                          * no progress made, because buffer is not big enough
3765                          * to hold this record; resize and retry.
3766                          */
3767                         buflen *= 2;
3768                         free(buf);
3769                         buf = NULL;
3770                         if ((buflen >= HIS_BUF_LEN_MAX) ||
3771                             ((buf = malloc(buflen)) == NULL)) {
3772                                 err = ENOMEM;
3773                                 break;
3774                         }
3775                 }
3776
3777                 /* CONSTCOND */
3778         } while (1);
3779
3780         free(buf);
3781
3782         if (!err) {
3783                 verify(nvlist_alloc(nvhisp, NV_UNIQUE_NAME, 0) == 0);
3784                 verify(nvlist_add_nvlist_array(*nvhisp, ZPOOL_HIST_RECORD,
3785                     records, numrecords) == 0);
3786         }
3787         for (i = 0; i < numrecords; i++)
3788                 nvlist_free(records[i]);
3789         free(records);
3790
3791         return (err);
3792 }
3793
3794 void
3795 zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
3796     char *pathname, size_t len)
3797 {
3798         zfs_cmd_t zc = { 0 };
3799         boolean_t mounted = B_FALSE;
3800         char *mntpnt = NULL;
3801         char dsname[MAXNAMELEN];
3802
3803         if (dsobj == 0) {
3804                 /* special case for the MOS */
3805                 (void) snprintf(pathname, len, "<metadata>:<0x%llx>", obj);
3806                 return;
3807         }
3808
3809         /* get the dataset's name */
3810         (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));
3811         zc.zc_obj = dsobj;
3812         if (ioctl(zhp->zpool_hdl->libzfs_fd,
3813             ZFS_IOC_DSOBJ_TO_DSNAME, &zc) != 0) {
3814                 /* just write out a path of two object numbers */
3815                 (void) snprintf(pathname, len, "<0x%llx>:<0x%llx>",
3816                     dsobj, obj);
3817                 return;
3818         }
3819         (void) strlcpy(dsname, zc.zc_value, sizeof (dsname));
3820
3821         /* find out if the dataset is mounted */
3822         mounted = is_mounted(zhp->zpool_hdl, dsname, &mntpnt);
3823
3824         /* get the corrupted object's path */
3825         (void) strlcpy(zc.zc_name, dsname, sizeof (zc.zc_name));
3826         zc.zc_obj = obj;
3827         if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_OBJ_TO_PATH,
3828             &zc) == 0) {
3829                 if (mounted) {
3830                         (void) snprintf(pathname, len, "%s%s", mntpnt,
3831                             zc.zc_value);
3832                 } else {
3833                         (void) snprintf(pathname, len, "%s:%s",
3834                             dsname, zc.zc_value);
3835                 }
3836         } else {
3837                 (void) snprintf(pathname, len, "%s:<0x%llx>", dsname, obj);
3838         }
3839         free(mntpnt);
3840 }
3841
3842 #ifdef illumos
3843 /*
3844  * Read the EFI label from the config, if a label does not exist then
3845  * pass back the error to the caller. If the caller has passed a non-NULL
3846  * diskaddr argument then we set it to the starting address of the EFI
3847  * partition.
3848  */
3849 static int
3850 read_efi_label(nvlist_t *config, diskaddr_t *sb)
3851 {
3852         char *path;
3853         int fd;
3854         char diskname[MAXPATHLEN];
3855         int err = -1;
3856
3857         if (nvlist_lookup_string(config, ZPOOL_CONFIG_PATH, &path) != 0)
3858                 return (err);
3859
3860         (void) snprintf(diskname, sizeof (diskname), "%s%s", ZFS_RDISK_ROOT,
3861             strrchr(path, '/'));
3862         if ((fd = open(diskname, O_RDONLY|O_NDELAY)) >= 0) {
3863                 struct dk_gpt *vtoc;
3864
3865                 if ((err = efi_alloc_and_read(fd, &vtoc)) >= 0) {
3866                         if (sb != NULL)
3867                                 *sb = vtoc->efi_parts[0].p_start;
3868                         efi_free(vtoc);
3869                 }
3870                 (void) close(fd);
3871         }
3872         return (err);
3873 }
3874
3875 /*
3876  * determine where a partition starts on a disk in the current
3877  * configuration
3878  */
3879 static diskaddr_t
3880 find_start_block(nvlist_t *config)
3881 {
3882         nvlist_t **child;
3883         uint_t c, children;
3884         diskaddr_t sb = MAXOFFSET_T;
3885         uint64_t wholedisk;
3886
3887         if (nvlist_lookup_nvlist_array(config,
3888             ZPOOL_CONFIG_CHILDREN, &child, &children) != 0) {
3889                 if (nvlist_lookup_uint64(config,
3890                     ZPOOL_CONFIG_WHOLE_DISK,
3891                     &wholedisk) != 0 || !wholedisk) {
3892                         return (MAXOFFSET_T);
3893                 }
3894                 if (read_efi_label(config, &sb) < 0)
3895                         sb = MAXOFFSET_T;
3896                 return (sb);
3897         }
3898
3899         for (c = 0; c < children; c++) {
3900                 sb = find_start_block(child[c]);
3901                 if (sb != MAXOFFSET_T) {
3902                         return (sb);
3903                 }
3904         }
3905         return (MAXOFFSET_T);
3906 }
3907 #endif /* illumos */
3908
3909 /*
3910  * Label an individual disk.  The name provided is the short name,
3911  * stripped of any leading /dev path.
3912  */
3913 int
3914 zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, const char *name)
3915 {
3916 #ifdef illumos
3917         char path[MAXPATHLEN];
3918         struct dk_gpt *vtoc;
3919         int fd;
3920         size_t resv = EFI_MIN_RESV_SIZE;
3921         uint64_t slice_size;
3922         diskaddr_t start_block;
3923         char errbuf[1024];
3924
3925         /* prepare an error message just in case */
3926         (void) snprintf(errbuf, sizeof (errbuf),
3927             dgettext(TEXT_DOMAIN, "cannot label '%s'"), name);
3928
3929         if (zhp) {
3930                 nvlist_t *nvroot;
3931
3932                 verify(nvlist_lookup_nvlist(zhp->zpool_config,
3933                     ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3934
3935                 if (zhp->zpool_start_block == 0)
3936                         start_block = find_start_block(nvroot);
3937                 else
3938                         start_block = zhp->zpool_start_block;
3939                 zhp->zpool_start_block = start_block;
3940         } else {
3941                 /* new pool */
3942                 start_block = NEW_START_BLOCK;
3943         }
3944
3945         (void) snprintf(path, sizeof (path), "%s/%s%s", ZFS_RDISK_ROOT, name,
3946             BACKUP_SLICE);
3947
3948         if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) {
3949                 /*
3950                  * This shouldn't happen.  We've long since verified that this
3951                  * is a valid device.
3952                  */
3953                 zfs_error_aux(hdl,
3954                     dgettext(TEXT_DOMAIN, "unable to open device"));
3955                 return (zfs_error(hdl, EZFS_OPENFAILED, errbuf));
3956         }
3957
3958         if (efi_alloc_and_init(fd, EFI_NUMPAR, &vtoc) != 0) {
3959                 /*
3960                  * The only way this can fail is if we run out of memory, or we
3961                  * were unable to read the disk's capacity
3962                  */
3963                 if (errno == ENOMEM)
3964                         (void) no_memory(hdl);
3965
3966                 (void) close(fd);
3967                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3968                     "unable to read disk capacity"), name);
3969
3970                 return (zfs_error(hdl, EZFS_NOCAP, errbuf));
3971         }
3972
3973         slice_size = vtoc->efi_last_u_lba + 1;
3974         slice_size -= EFI_MIN_RESV_SIZE;
3975         if (start_block == MAXOFFSET_T)
3976                 start_block = NEW_START_BLOCK;
3977         slice_size -= start_block;
3978
3979         vtoc->efi_parts[0].p_start = start_block;
3980         vtoc->efi_parts[0].p_size = slice_size;
3981
3982         /*
3983          * Why we use V_USR: V_BACKUP confuses users, and is considered
3984          * disposable by some EFI utilities (since EFI doesn't have a backup
3985          * slice).  V_UNASSIGNED is supposed to be used only for zero size
3986          * partitions, and efi_write() will fail if we use it.  V_ROOT, V_BOOT,
3987          * etc. were all pretty specific.  V_USR is as close to reality as we
3988          * can get, in the absence of V_OTHER.
3989          */
3990         vtoc->efi_parts[0].p_tag = V_USR;
3991         (void) strcpy(vtoc->efi_parts[0].p_name, "zfs");
3992
3993         vtoc->efi_parts[8].p_start = slice_size + start_block;
3994         vtoc->efi_parts[8].p_size = resv;
3995         vtoc->efi_parts[8].p_tag = V_RESERVED;
3996
3997         if (efi_write(fd, vtoc) != 0) {
3998                 /*
3999                  * Some block drivers (like pcata) may not support EFI
4000                  * GPT labels.  Print out a helpful error message dir-
4001                  * ecting the user to manually label the disk and give
4002                  * a specific slice.
4003                  */
4004                 (void) close(fd);
4005                 efi_free(vtoc);
4006
4007                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4008                     "try using fdisk(1M) and then provide a specific slice"));
4009                 return (zfs_error(hdl, EZFS_LABELFAILED, errbuf));
4010         }
4011
4012         (void) close(fd);
4013         efi_free(vtoc);
4014 #endif /* illumos */
4015         return (0);
4016 }
4017
4018 static boolean_t
4019 supported_dump_vdev_type(libzfs_handle_t *hdl, nvlist_t *config, char *errbuf)
4020 {
4021         char *type;
4022         nvlist_t **child;
4023         uint_t children, c;
4024
4025         verify(nvlist_lookup_string(config, ZPOOL_CONFIG_TYPE, &type) == 0);
4026         if (strcmp(type, VDEV_TYPE_FILE) == 0 ||
4027             strcmp(type, VDEV_TYPE_HOLE) == 0 ||
4028             strcmp(type, VDEV_TYPE_MISSING) == 0) {
4029                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4030                     "vdev type '%s' is not supported"), type);
4031                 (void) zfs_error(hdl, EZFS_VDEVNOTSUP, errbuf);
4032                 return (B_FALSE);
4033         }
4034         if (nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN,
4035             &child, &children) == 0) {
4036                 for (c = 0; c < children; c++) {
4037                         if (!supported_dump_vdev_type(hdl, child[c], errbuf))
4038                                 return (B_FALSE);
4039                 }
4040         }
4041         return (B_TRUE);
4042 }
4043
4044 /*
4045  * Check if this zvol is allowable for use as a dump device; zero if
4046  * it is, > 0 if it isn't, < 0 if it isn't a zvol.
4047  *
4048  * Allowable storage configurations include mirrors, all raidz variants, and
4049  * pools with log, cache, and spare devices.  Pools which are backed by files or
4050  * have missing/hole vdevs are not suitable.
4051  */
4052 int
4053 zvol_check_dump_config(char *arg)
4054 {
4055         zpool_handle_t *zhp = NULL;
4056         nvlist_t *config, *nvroot;
4057         char *p, *volname;
4058         nvlist_t **top;
4059         uint_t toplevels;
4060         libzfs_handle_t *hdl;
4061         char errbuf[1024];
4062         char poolname[ZPOOL_MAXNAMELEN];
4063         int pathlen = strlen(ZVOL_FULL_DEV_DIR);
4064         int ret = 1;
4065
4066         if (strncmp(arg, ZVOL_FULL_DEV_DIR, pathlen)) {
4067                 return (-1);
4068         }
4069
4070         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4071             "dump is not supported on device '%s'"), arg);
4072
4073         if ((hdl = libzfs_init()) == NULL)
4074                 return (1);
4075         libzfs_print_on_error(hdl, B_TRUE);
4076
4077         volname = arg + pathlen;
4078
4079         /* check the configuration of the pool */
4080         if ((p = strchr(volname, '/')) == NULL) {
4081                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4082                     "malformed dataset name"));
4083                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
4084                 return (1);
4085         } else if (p - volname >= ZFS_MAXNAMELEN) {
4086                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4087                     "dataset name is too long"));
4088                 (void) zfs_error(hdl, EZFS_NAMETOOLONG, errbuf);
4089                 return (1);
4090         } else {
4091                 (void) strncpy(poolname, volname, p - volname);
4092                 poolname[p - volname] = '\0';
4093         }
4094
4095         if ((zhp = zpool_open(hdl, poolname)) == NULL) {
4096                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4097                     "could not open pool '%s'"), poolname);
4098                 (void) zfs_error(hdl, EZFS_OPENFAILED, errbuf);
4099                 goto out;
4100         }
4101         config = zpool_get_config(zhp, NULL);
4102         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4103             &nvroot) != 0) {
4104                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4105                     "could not obtain vdev configuration for  '%s'"), poolname);
4106                 (void) zfs_error(hdl, EZFS_INVALCONFIG, errbuf);
4107                 goto out;
4108         }
4109
4110         verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
4111             &top, &toplevels) == 0);
4112
4113         if (!supported_dump_vdev_type(hdl, top[0], errbuf)) {
4114                 goto out;
4115         }
4116         ret = 0;
4117
4118 out:
4119         if (zhp)
4120                 zpool_close(zhp);
4121         libzfs_fini(hdl);
4122         return (ret);
4123 }