lib/libzfs/libzfs_util.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  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 /*
  26  * Internal utility routines for the ZFS library.
  27  */
  28
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <libintl.h>
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <strings.h>
  36 #include <unistd.h>
  37 #include <ctype.h>
  38 #include <math.h>
  39 #include <sys/mnttab.h>
  40 #include <sys/mntent.h>
  41 #include <sys/types.h>
  42
  43 #include <libzfs.h>
  44
  45 #include "libzfs_impl.h"
  46 #include "zfs_prop.h"
  47
  48 int
  49 libzfs_errno(libzfs_handle_t *hdl)
  50 {
  51         return (hdl->libzfs_error);
  52 }
  53
  54 const char *
  55 libzfs_error_action(libzfs_handle_t *hdl)
  56 {
  57         return (hdl->libzfs_action);
  58 }
  59
  60 const char *
  61 libzfs_error_description(libzfs_handle_t *hdl)
  62 {
  63         if (hdl->libzfs_desc[0] != '\0')
  64                 return (hdl->libzfs_desc);
  65
  66         switch (hdl->libzfs_error) {
  67         case EZFS_NOMEM:
  68                 return (dgettext(TEXT_DOMAIN, "out of memory"));
  69         case EZFS_BADPROP:
  70                 return (dgettext(TEXT_DOMAIN, "invalid property value"));
  71         case EZFS_PROPREADONLY:
  72                 return (dgettext(TEXT_DOMAIN, "read only property"));
  73         case EZFS_PROPTYPE:
  74                 return (dgettext(TEXT_DOMAIN, "property doesn't apply to "
  75                     "datasets of this type"));
  76         case EZFS_PROPNONINHERIT:
  77                 return (dgettext(TEXT_DOMAIN, "property cannot be inherited"));
  78         case EZFS_PROPSPACE:
  79                 return (dgettext(TEXT_DOMAIN, "invalid quota or reservation"));
  80         case EZFS_BADTYPE:
  81                 return (dgettext(TEXT_DOMAIN, "operation not applicable to "
  82                     "datasets of this type"));
  83         case EZFS_BUSY:
  84                 return (dgettext(TEXT_DOMAIN, "pool or dataset is busy"));
  85         case EZFS_EXISTS:
  86                 return (dgettext(TEXT_DOMAIN, "pool or dataset exists"));
  87         case EZFS_NOENT:
  88                 return (dgettext(TEXT_DOMAIN, "no such pool or dataset"));
  89         case EZFS_BADSTREAM:
  90                 return (dgettext(TEXT_DOMAIN, "invalid backup stream"));
  91         case EZFS_DSREADONLY:
  92                 return (dgettext(TEXT_DOMAIN, "dataset is read only"));
  93         case EZFS_VOLTOOBIG:
  94                 return (dgettext(TEXT_DOMAIN, "volume size exceeds limit for "
  95                     "this system"));
  96         case EZFS_INVALIDNAME:
  97                 return (dgettext(TEXT_DOMAIN, "invalid name"));
  98         case EZFS_BADRESTORE:
  99                 return (dgettext(TEXT_DOMAIN, "unable to restore to "
 100                     "destination"));
 101         case EZFS_BADBACKUP:
 102                 return (dgettext(TEXT_DOMAIN, "backup failed"));
 103         case EZFS_BADTARGET:
 104                 return (dgettext(TEXT_DOMAIN, "invalid target vdev"));
 105         case EZFS_NODEVICE:
 106                 return (dgettext(TEXT_DOMAIN, "no such device in pool"));
 107         case EZFS_BADDEV:
 108                 return (dgettext(TEXT_DOMAIN, "invalid device"));
 109         case EZFS_NOREPLICAS:
 110                 return (dgettext(TEXT_DOMAIN, "no valid replicas"));
 111         case EZFS_RESILVERING:
 112                 return (dgettext(TEXT_DOMAIN, "currently resilvering"));
 113         case EZFS_BADVERSION:
 114                 return (dgettext(TEXT_DOMAIN, "unsupported version"));
 115         case EZFS_POOLUNAVAIL:
 116                 return (dgettext(TEXT_DOMAIN, "pool is unavailable"));
 117         case EZFS_DEVOVERFLOW:
 118                 return (dgettext(TEXT_DOMAIN, "too many devices in one vdev"));
 119         case EZFS_BADPATH:
 120                 return (dgettext(TEXT_DOMAIN, "must be an absolute path"));
 121         case EZFS_CROSSTARGET:
 122                 return (dgettext(TEXT_DOMAIN, "operation crosses datasets or "
 123                     "pools"));
 124         case EZFS_ZONED:
 125                 return (dgettext(TEXT_DOMAIN, "dataset in use by local zone"));
 126         case EZFS_MOUNTFAILED:
 127                 return (dgettext(TEXT_DOMAIN, "mount failed"));
 128         case EZFS_UMOUNTFAILED:
 129                 return (dgettext(TEXT_DOMAIN, "umount failed"));
 130         case EZFS_UNSHARENFSFAILED:
 131                 return (dgettext(TEXT_DOMAIN, "unshare(1M) failed"));
 132         case EZFS_SHARENFSFAILED:
 133                 return (dgettext(TEXT_DOMAIN, "share(1M) failed"));
 134         case EZFS_UNSHARESMBFAILED:
 135                 return (dgettext(TEXT_DOMAIN, "smb remove share failed"));
 136         case EZFS_SHARESMBFAILED:
 137                 return (dgettext(TEXT_DOMAIN, "smb add share failed"));
 138         case EZFS_PERM:
 139                 return (dgettext(TEXT_DOMAIN, "permission denied"));
 140         case EZFS_NOSPC:
 141                 return (dgettext(TEXT_DOMAIN, "out of space"));
 142         case EZFS_FAULT:
 143                 return (dgettext(TEXT_DOMAIN, "bad address"));
 144         case EZFS_IO:
 145                 return (dgettext(TEXT_DOMAIN, "I/O error"));
 146         case EZFS_INTR:
 147                 return (dgettext(TEXT_DOMAIN, "signal received"));
 148         case EZFS_ISSPARE:
 149                 return (dgettext(TEXT_DOMAIN, "device is reserved as a hot "
 150                     "spare"));
 151         case EZFS_INVALCONFIG:
 152                 return (dgettext(TEXT_DOMAIN, "invalid vdev configuration"));
 153         case EZFS_RECURSIVE:
 154                 return (dgettext(TEXT_DOMAIN, "recursive dataset dependency"));
 155         case EZFS_NOHISTORY:
 156                 return (dgettext(TEXT_DOMAIN, "no history available"));
 157         case EZFS_POOLPROPS:
 158                 return (dgettext(TEXT_DOMAIN, "failed to retrieve "
 159                     "pool properties"));
 160         case EZFS_POOL_NOTSUP:
 161                 return (dgettext(TEXT_DOMAIN, "operation not supported "
 162                     "on this type of pool"));
 163         case EZFS_POOL_INVALARG:
 164                 return (dgettext(TEXT_DOMAIN, "invalid argument for "
 165                     "this pool operation"));
 166         case EZFS_NAMETOOLONG:
 167                 return (dgettext(TEXT_DOMAIN, "dataset name is too long"));
 168         case EZFS_OPENFAILED:
 169                 return (dgettext(TEXT_DOMAIN, "open failed"));
 170         case EZFS_NOCAP:
 171                 return (dgettext(TEXT_DOMAIN,
 172                     "disk capacity information could not be retrieved"));
 173         case EZFS_LABELFAILED:
 174                 return (dgettext(TEXT_DOMAIN, "write of label failed"));
 175         case EZFS_BADWHO:
 176                 return (dgettext(TEXT_DOMAIN, "invalid user/group"));
 177         case EZFS_BADPERM:
 178                 return (dgettext(TEXT_DOMAIN, "invalid permission"));
 179         case EZFS_BADPERMSET:
 180                 return (dgettext(TEXT_DOMAIN, "invalid permission set name"));
 181         case EZFS_NODELEGATION:
 182                 return (dgettext(TEXT_DOMAIN, "delegated administration is "
 183                     "disabled on pool"));
 184         case EZFS_PERMRDONLY:
 185                 return (dgettext(TEXT_DOMAIN, "snapshot permissions cannot be"
 186                     " modified"));
 187         case EZFS_BADCACHE:
 188                 return (dgettext(TEXT_DOMAIN, "invalid or missing cache file"));
 189         case EZFS_ISL2CACHE:
 190                 return (dgettext(TEXT_DOMAIN, "device is in use as a cache"));
 191         case EZFS_VDEVNOTSUP:
 192                 return (dgettext(TEXT_DOMAIN, "vdev specification is not "
 193                     "supported"));
 194         case EZFS_NOTSUP:
 195                 return (dgettext(TEXT_DOMAIN, "operation not supported "
 196                     "on this dataset"));
 197         case EZFS_ACTIVE_SPARE:
 198                 return (dgettext(TEXT_DOMAIN, "pool has active shared spare "
 199                     "device"));
 200         case EZFS_UNPLAYED_LOGS:
 201                 return (dgettext(TEXT_DOMAIN, "log device has unplayed intent "
 202                     "logs"));
 203         case EZFS_REFTAG_RELE:
 204                 return (dgettext(TEXT_DOMAIN, "no such tag on this dataset"));
 205         case EZFS_REFTAG_HOLD:
 206                 return (dgettext(TEXT_DOMAIN, "tag already exists on this "
 207                     "dataset"));
 208         case EZFS_TAGTOOLONG:
 209                 return (dgettext(TEXT_DOMAIN, "tag too long"));
 210         case EZFS_PIPEFAILED:
 211                 return (dgettext(TEXT_DOMAIN, "pipe create failed"));
 212         case EZFS_THREADCREATEFAILED:
 213                 return (dgettext(TEXT_DOMAIN, "thread create failed"));
 214         case EZFS_POSTSPLIT_ONLINE:
 215                 return (dgettext(TEXT_DOMAIN, "disk was split from this pool "
 216                     "into a new one"));
 217         case EZFS_SCRUBBING:
 218                 return (dgettext(TEXT_DOMAIN, "currently scrubbing; "
 219                     "use 'zpool scrub -s' to cancel current scrub"));
 220         case EZFS_NO_SCRUB:
 221                 return (dgettext(TEXT_DOMAIN, "there is no active scrub"));
 222         case EZFS_UNKNOWN:
 223                 return (dgettext(TEXT_DOMAIN, "unknown error"));
 224         default:
 225                 assert(hdl->libzfs_error == 0);
 226                 return (dgettext(TEXT_DOMAIN, "no error"));
 227         }
 228 }
 229
 230 /*PRINTFLIKE2*/
 231 void
 232 zfs_error_aux(libzfs_handle_t *hdl, const char *fmt, ...)
 233 {
 234         va_list ap;
 235
 236         va_start(ap, fmt);
 237
 238         (void) vsnprintf(hdl->libzfs_desc, sizeof (hdl->libzfs_desc),
 239             fmt, ap);
 240         hdl->libzfs_desc_active = 1;
 241
 242         va_end(ap);
 243 }
 244
 245 static void
 246 zfs_verror(libzfs_handle_t *hdl, int error, const char *fmt, va_list ap)
 247 {
 248         (void) vsnprintf(hdl->libzfs_action, sizeof (hdl->libzfs_action),
 249             fmt, ap);
 250         hdl->libzfs_error = error;
 251
 252         if (hdl->libzfs_desc_active)
 253                 hdl->libzfs_desc_active = 0;
 254         else
 255                 hdl->libzfs_desc[0] = '\0';
 256
 257         if (hdl->libzfs_printerr) {
 258                 if (error == EZFS_UNKNOWN) {
 259                         (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "internal "
 260                             "error: %s\n"), libzfs_error_description(hdl));
 261                         abort();
 262                 }
 263
 264                 (void) fprintf(stderr, "%s: %s\n", hdl->libzfs_action,
 265                     libzfs_error_description(hdl));
 266                 if (error == EZFS_NOMEM)
 267                         exit(1);
 268         }
 269 }
 270
 271 int
 272 zfs_error(libzfs_handle_t *hdl, int error, const char *msg)
 273 {
 274         return (zfs_error_fmt(hdl, error, "%s", msg));
 275 }
 276
 277 /*PRINTFLIKE3*/
 278 int
 279 zfs_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
 280 {
 281         va_list ap;
 282
 283         va_start(ap, fmt);
 284
 285         zfs_verror(hdl, error, fmt, ap);
 286
 287         va_end(ap);
 288
 289         return (-1);
 290 }
 291
 292 static int
 293 zfs_common_error(libzfs_handle_t *hdl, int error, const char *fmt,
 294     va_list ap)
 295 {
 296         switch (error) {
 297         case EPERM:
 298         case EACCES:
 299                 zfs_verror(hdl, EZFS_PERM, fmt, ap);
 300                 return (-1);
 301
 302         case ECANCELED:
 303                 zfs_verror(hdl, EZFS_NODELEGATION, fmt, ap);
 304                 return (-1);
 305
 306         case EIO:
 307                 zfs_verror(hdl, EZFS_IO, fmt, ap);
 308                 return (-1);
 309
 310         case EFAULT:
 311                 zfs_verror(hdl, EZFS_FAULT, fmt, ap);
 312                 return (-1);
 313
 314         case EINTR:
 315                 zfs_verror(hdl, EZFS_INTR, fmt, ap);
 316                 return (-1);
 317         }
 318
 319         return (0);
 320 }
 321
 322 int
 323 zfs_standard_error(libzfs_handle_t *hdl, int error, const char *msg)
 324 {
 325         return (zfs_standard_error_fmt(hdl, error, "%s", msg));
 326 }
 327
 328 /*PRINTFLIKE3*/
 329 int
 330 zfs_standard_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
 331 {
 332         va_list ap;
 333
 334         va_start(ap, fmt);
 335
 336         if (zfs_common_error(hdl, error, fmt, ap) != 0) {
 337                 va_end(ap);
 338                 return (-1);
 339         }
 340
 341         switch (error) {
 342         case ENXIO:
 343         case ENODEV:
 344                 zfs_verror(hdl, EZFS_IO, fmt, ap);
 345                 break;
 346
 347         case ENOENT:
 348                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 349                     "dataset does not exist"));
 350                 zfs_verror(hdl, EZFS_NOENT, fmt, ap);
 351                 break;
 352
 353         case ENOSPC:
 354         case EDQUOT:
 355                 zfs_verror(hdl, EZFS_NOSPC, fmt, ap);
 356                 return (-1);
 357
 358         case EEXIST:
 359                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 360                     "dataset already exists"));
 361                 zfs_verror(hdl, EZFS_EXISTS, fmt, ap);
 362                 break;
 363
 364         case EBUSY:
 365                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 366                     "dataset is busy"));
 367                 zfs_verror(hdl, EZFS_BUSY, fmt, ap);
 368                 break;
 369         case EROFS:
 370                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 371                     "snapshot permissions cannot be modified"));
 372                 zfs_verror(hdl, EZFS_PERMRDONLY, fmt, ap);
 373                 break;
 374         case ENAMETOOLONG:
 375                 zfs_verror(hdl, EZFS_NAMETOOLONG, fmt, ap);
 376                 break;
 377         case ENOTSUP:
 378                 zfs_verror(hdl, EZFS_BADVERSION, fmt, ap);
 379                 break;
 380         case EAGAIN:
 381                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 382                     "pool I/O is currently suspended"));
 383                 zfs_verror(hdl, EZFS_POOLUNAVAIL, fmt, ap);
 384                 break;
 385         default:
 386                 zfs_error_aux(hdl, strerror(error));
 387                 zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap);
 388                 break;
 389         }
 390
 391         va_end(ap);
 392         return (-1);
 393 }
 394
 395 int
 396 zpool_standard_error(libzfs_handle_t *hdl, int error, const char *msg)
 397 {
 398         return (zpool_standard_error_fmt(hdl, error, "%s", msg));
 399 }
 400
 401 /*PRINTFLIKE3*/
 402 int
 403 zpool_standard_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
 404 {
 405         va_list ap;
 406
 407         va_start(ap, fmt);
 408
 409         if (zfs_common_error(hdl, error, fmt, ap) != 0) {
 410                 va_end(ap);
 411                 return (-1);
 412         }
 413
 414         switch (error) {
 415         case ENODEV:
 416                 zfs_verror(hdl, EZFS_NODEVICE, fmt, ap);
 417                 break;
 418
 419         case ENOENT:
 420                 zfs_error_aux(hdl,
 421                     dgettext(TEXT_DOMAIN, "no such pool or dataset"));
 422                 zfs_verror(hdl, EZFS_NOENT, fmt, ap);
 423                 break;
 424
 425         case EEXIST:
 426                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 427                     "pool already exists"));
 428                 zfs_verror(hdl, EZFS_EXISTS, fmt, ap);
 429                 break;
 430
 431         case EBUSY:
 432                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool is busy"));
 433                 zfs_verror(hdl, EZFS_BUSY, fmt, ap);
 434                 break;
 435
 436         case ENXIO:
 437                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 438                     "one or more devices is currently unavailable"));
 439                 zfs_verror(hdl, EZFS_BADDEV, fmt, ap);
 440                 break;
 441
 442         case ENAMETOOLONG:
 443                 zfs_verror(hdl, EZFS_DEVOVERFLOW, fmt, ap);
 444                 break;
 445
 446         case ENOTSUP:
 447                 zfs_verror(hdl, EZFS_POOL_NOTSUP, fmt, ap);
 448                 break;
 449
 450         case EINVAL:
 451                 zfs_verror(hdl, EZFS_POOL_INVALARG, fmt, ap);
 452                 break;
 453
 454         case ENOSPC:
 455         case EDQUOT:
 456                 zfs_verror(hdl, EZFS_NOSPC, fmt, ap);
 457                 return (-1);
 458         case EAGAIN:
 459                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 460                     "pool I/O is currently suspended"));
 461                 zfs_verror(hdl, EZFS_POOLUNAVAIL, fmt, ap);
 462                 break;
 463
 464         default:
 465                 zfs_error_aux(hdl, strerror(error));
 466                 zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap);
 467         }
 468
 469         va_end(ap);
 470         return (-1);
 471 }
 472
 473 /*
 474  * Display an out of memory error message and abort the current program.
 475  */
 476 int
 477 no_memory(libzfs_handle_t *hdl)
 478 {
 479         return (zfs_error(hdl, EZFS_NOMEM, "internal error"));
 480 }
 481
 482 /*
 483  * A safe form of malloc() which will die if the allocation fails.
 484  */
 485 void *
 486 zfs_alloc(libzfs_handle_t *hdl, size_t size)
 487 {
 488         void *data;
 489
 490         if ((data = calloc(1, size)) == NULL)
 491                 (void) no_memory(hdl);
 492
 493         return (data);
 494 }
 495
 496 /*
 497  * A safe form of realloc(), which also zeroes newly allocated space.
 498  */
 499 void *
 500 zfs_realloc(libzfs_handle_t *hdl, void *ptr, size_t oldsize, size_t newsize)
 501 {
 502         void *ret;
 503
 504         if ((ret = realloc(ptr, newsize)) == NULL) {
 505                 (void) no_memory(hdl);
 506                 return (NULL);
 507         }
 508
 509         bzero((char *)ret + oldsize, (newsize - oldsize));
 510         return (ret);
 511 }
 512
 513 /*
 514  * A safe form of strdup() which will die if the allocation fails.
 515  */
 516 char *
 517 zfs_strdup(libzfs_handle_t *hdl, const char *str)
 518 {
 519         char *ret;
 520
 521         if ((ret = strdup(str)) == NULL)
 522                 (void) no_memory(hdl);
 523
 524         return (ret);
 525 }
 526
 527 /*
 528  * Convert a number to an appropriately human-readable output.
 529  */
 530 void
 531 zfs_nicenum(uint64_t num, char *buf, size_t buflen)
 532 {
 533         uint64_t n = num;
 534         int index = 0;
 535         char u;
 536
 537         while (n >= 1024) {
 538                 n /= 1024;
 539                 index++;
 540         }
 541
 542         u = " KMGTPE"[index];
 543
 544         if (index == 0) {
 545                 (void) snprintf(buf, buflen, "%llu", n);
 546         } else if ((num & ((1ULL << 10 * index) - 1)) == 0) {
 547                 /*
 548                  * If this is an even multiple of the base, always display
 549                  * without any decimal precision.
 550                  */
 551                 (void) snprintf(buf, buflen, "%llu%c", n, u);
 552         } else {
 553                 /*
 554                  * We want to choose a precision that reflects the best choice
 555                  * for fitting in 5 characters.  This can get rather tricky when
 556                  * we have numbers that are very close to an order of magnitude.
 557                  * For example, when displaying 10239 (which is really 9.999K),
 558                  * we want only a single place of precision for 10.0K.  We could
 559                  * develop some complex heuristics for this, but it's much
 560                  * easier just to try each combination in turn.
 561                  */
 562                 int i;
 563                 for (i = 2; i >= 0; i--) {
 564                         if (snprintf(buf, buflen, "%.*f%c", i,
 565                             (double)num / (1ULL << 10 * index), u) <= 5)
 566                                 break;
 567                 }
 568         }
 569 }
 570
 571 void
 572 libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr)
 573 {
 574         hdl->libzfs_printerr = printerr;
 575 }
 576
 577 libzfs_handle_t *
 578 libzfs_init(void)
 579 {
 580         libzfs_handle_t *hdl;
 581
 582         if ((hdl = calloc(sizeof (libzfs_handle_t), 1)) == NULL) {
 583                 return (NULL);
 584         }
 585
 586         if ((hdl->libzfs_fd = open(ZFS_DEV, O_RDWR)) < 0) {
 587                 free(hdl);
 588                 return (NULL);
 589         }
 590
 591         if ((hdl->libzfs_mnttab = fopen(MNTTAB, "r")) == NULL) {
 592                 (void) close(hdl->libzfs_fd);
 593                 free(hdl);
 594                 return (NULL);
 595         }
 596
 597         hdl->libzfs_sharetab = fopen("/etc/dfs/sharetab", "r");
 598
 599         zfs_prop_init();
 600         zpool_prop_init();
 601         libzfs_mnttab_init(hdl);
 602
 603         return (hdl);
 604 }
 605
 606 void
 607 libzfs_fini(libzfs_handle_t *hdl)
 608 {
 609         (void) close(hdl->libzfs_fd);
 610         if (hdl->libzfs_mnttab)
 611                 (void) fclose(hdl->libzfs_mnttab);
 612         if (hdl->libzfs_sharetab)
 613                 (void) fclose(hdl->libzfs_sharetab);
 614         zfs_uninit_libshare(hdl);
 615         if (hdl->libzfs_log_str)
 616                 (void) free(hdl->libzfs_log_str);
 617         zpool_free_handles(hdl);
 618         libzfs_fru_clear(hdl, B_TRUE);
 619         namespace_clear(hdl);
 620         libzfs_mnttab_fini(hdl);
 621         free(hdl);
 622 }
 623
 624 libzfs_handle_t *
 625 zpool_get_handle(zpool_handle_t *zhp)
 626 {
 627         return (zhp->zpool_hdl);
 628 }
 629
 630 libzfs_handle_t *
 631 zfs_get_handle(zfs_handle_t *zhp)
 632 {
 633         return (zhp->zfs_hdl);
 634 }
 635
 636 zpool_handle_t *
 637 zfs_get_pool_handle(const zfs_handle_t *zhp)
 638 {
 639         return (zhp->zpool_hdl);
 640 }
 641
 642 /*
 643  * Given a name, determine whether or not it's a valid path
 644  * (starts with '/' or "./").  If so, walk the mnttab trying
 645  * to match the device number.  If not, treat the path as an
 646  * fs/vol/snap name.
 647  */
 648 zfs_handle_t *
 649 zfs_path_to_zhandle(libzfs_handle_t *hdl, char *path, zfs_type_t argtype)
 650 {
 651         struct stat64 statbuf;
 652         struct extmnttab entry;
 653         int ret;
 654
 655         if (path[0] != '/' && strncmp(path, "./", strlen("./")) != 0) {
 656                 /*
 657                  * It's not a valid path, assume it's a name of type 'argtype'.
 658                  */
 659                 return (zfs_open(hdl, path, argtype));
 660         }
 661
 662         if (stat64(path, &statbuf) != 0) {
 663                 (void) fprintf(stderr, "%s: %s\n", path, strerror(errno));
 664                 return (NULL);
 665         }
 666
 667         rewind(hdl->libzfs_mnttab);
 668         while ((ret = getextmntent(hdl->libzfs_mnttab, &entry, 0)) == 0) {
 669                 if (makedevice(entry.mnt_major, entry.mnt_minor) ==
 670                     statbuf.st_dev) {
 671                         break;
 672                 }
 673         }
 674         if (ret != 0) {
 675                 return (NULL);
 676         }
 677
 678         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
 679                 (void) fprintf(stderr, gettext("'%s': not a ZFS filesystem\n"),
 680                     path);
 681                 return (NULL);
 682         }
 683
 684         return (zfs_open(hdl, entry.mnt_special, ZFS_TYPE_FILESYSTEM));
 685 }
 686
 687 /*
 688  * Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from
 689  * an ioctl().
 690  */
 691 int
 692 zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len)
 693 {
 694         if (len == 0)
 695                 len = 4*1024;
 696         zc->zc_nvlist_dst_size = len;
 697         if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
 698             zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == NULL)
 699                 return (-1);
 700
 701         return (0);
 702 }
 703
 704 /*
 705  * Called when an ioctl() which returns an nvlist fails with ENOMEM.  This will
 706  * expand the nvlist to the size specified in 'zc_nvlist_dst_size', which was
 707  * filled in by the kernel to indicate the actual required size.
 708  */
 709 int
 710 zcmd_expand_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 711 {
 712         free((void *)(uintptr_t)zc->zc_nvlist_dst);
 713         if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
 714             zfs_alloc(hdl, zc->zc_nvlist_dst_size))
 715             == NULL)
 716                 return (-1);
 717
 718         return (0);
 719 }
 720
 721 /*
 722  * Called to free the src and dst nvlists stored in the command structure.
 723  */
 724 void
 725 zcmd_free_nvlists(zfs_cmd_t *zc)
 726 {
 727         free((void *)(uintptr_t)zc->zc_nvlist_conf);
 728         free((void *)(uintptr_t)zc->zc_nvlist_src);
 729         free((void *)(uintptr_t)zc->zc_nvlist_dst);
 730 }
 731
 732 static int
 733 zcmd_write_nvlist_com(libzfs_handle_t *hdl, uint64_t *outnv, uint64_t *outlen,
 734     nvlist_t *nvl)
 735 {
 736         char *packed;
 737         size_t len;
 738
 739         verify(nvlist_size(nvl, &len, NV_ENCODE_NATIVE) == 0);
 740
 741         if ((packed = zfs_alloc(hdl, len)) == NULL)
 742                 return (-1);
 743
 744         verify(nvlist_pack(nvl, &packed, &len, NV_ENCODE_NATIVE, 0) == 0);
 745
 746         *outnv = (uint64_t)(uintptr_t)packed;
 747         *outlen = len;
 748
 749         return (0);
 750 }
 751
 752 int
 753 zcmd_write_conf_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl)
 754 {
 755         return (zcmd_write_nvlist_com(hdl, &zc->zc_nvlist_conf,
 756             &zc->zc_nvlist_conf_size, nvl));
 757 }
 758
 759 int
 760 zcmd_write_src_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl)
 761 {
 762         return (zcmd_write_nvlist_com(hdl, &zc->zc_nvlist_src,
 763             &zc->zc_nvlist_src_size, nvl));
 764 }
 765
 766 /*
 767  * Unpacks an nvlist from the ZFS ioctl command structure.
 768  */
 769 int
 770 zcmd_read_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t **nvlp)
 771 {
 772         if (nvlist_unpack((void *)(uintptr_t)zc->zc_nvlist_dst,
 773             zc->zc_nvlist_dst_size, nvlp, 0) != 0)
 774                 return (no_memory(hdl));
 775
 776         return (0);
 777 }
 778
 779 int
 780 zfs_ioctl(libzfs_handle_t *hdl, int request, zfs_cmd_t *zc)
 781 {
 782         int error;
 783
 784         zc->zc_history = (uint64_t)(uintptr_t)hdl->libzfs_log_str;
 785         error = ioctl(hdl->libzfs_fd, request, zc);
 786         if (hdl->libzfs_log_str) {
 787                 free(hdl->libzfs_log_str);
 788                 hdl->libzfs_log_str = NULL;
 789         }
 790         zc->zc_history = 0;
 791
 792         return (error);
 793 }
 794
 795 /*
 796  * ================================================================
 797  * API shared by zfs and zpool property management
 798  * ================================================================
 799  */
 800
 801 static void
 802 zprop_print_headers(zprop_get_cbdata_t *cbp, zfs_type_t type)
 803 {
 804         zprop_list_t *pl = cbp->cb_proplist;
 805         int i;
 806         char *title;
 807         size_t len;
 808
 809         cbp->cb_first = B_FALSE;
 810         if (cbp->cb_scripted)
 811                 return;
 812
 813         /*
 814          * Start with the length of the column headers.
 815          */
 816         cbp->cb_colwidths[GET_COL_NAME] = strlen(dgettext(TEXT_DOMAIN, "NAME"));
 817         cbp->cb_colwidths[GET_COL_PROPERTY] = strlen(dgettext(TEXT_DOMAIN,
 818             "PROPERTY"));
 819         cbp->cb_colwidths[GET_COL_VALUE] = strlen(dgettext(TEXT_DOMAIN,
 820             "VALUE"));
 821         cbp->cb_colwidths[GET_COL_RECVD] = strlen(dgettext(TEXT_DOMAIN,
 822             "RECEIVED"));
 823         cbp->cb_colwidths[GET_COL_SOURCE] = strlen(dgettext(TEXT_DOMAIN,
 824             "SOURCE"));
 825
 826         /* first property is always NAME */
 827         assert(cbp->cb_proplist->pl_prop ==
 828             ((type == ZFS_TYPE_POOL) ?  ZPOOL_PROP_NAME : ZFS_PROP_NAME));
 829
 830         /*
 831          * Go through and calculate the widths for each column.  For the
 832          * 'source' column, we kludge it up by taking the worst-case scenario of
 833          * inheriting from the longest name.  This is acceptable because in the
 834          * majority of cases 'SOURCE' is the last column displayed, and we don't
 835          * use the width anyway.  Note that the 'VALUE' column can be oversized,
 836          * if the name of the property is much longer than any values we find.
 837          */
 838         for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) {
 839                 /*
 840                  * 'PROPERTY' column
 841                  */
 842                 if (pl->pl_prop != ZPROP_INVAL) {
 843                         const char *propname = (type == ZFS_TYPE_POOL) ?
 844                             zpool_prop_to_name(pl->pl_prop) :
 845                             zfs_prop_to_name(pl->pl_prop);
 846
 847                         len = strlen(propname);
 848                         if (len > cbp->cb_colwidths[GET_COL_PROPERTY])
 849                                 cbp->cb_colwidths[GET_COL_PROPERTY] = len;
 850                 } else {
 851                         len = strlen(pl->pl_user_prop);
 852                         if (len > cbp->cb_colwidths[GET_COL_PROPERTY])
 853                                 cbp->cb_colwidths[GET_COL_PROPERTY] = len;
 854                 }
 855
 856                 /*
 857                  * 'VALUE' column.  The first property is always the 'name'
 858                  * property that was tacked on either by /sbin/zfs's
 859                  * zfs_do_get() or when calling zprop_expand_list(), so we
 860                  * ignore its width.  If the user specified the name property
 861                  * to display, then it will be later in the list in any case.
 862                  */
 863                 if (pl != cbp->cb_proplist &&
 864                     pl->pl_width > cbp->cb_colwidths[GET_COL_VALUE])
 865                         cbp->cb_colwidths[GET_COL_VALUE] = pl->pl_width;
 866
 867                 /* 'RECEIVED' column. */
 868                 if (pl != cbp->cb_proplist &&
 869                     pl->pl_recvd_width > cbp->cb_colwidths[GET_COL_RECVD])
 870                         cbp->cb_colwidths[GET_COL_RECVD] = pl->pl_recvd_width;
 871
 872                 /*
 873                  * 'NAME' and 'SOURCE' columns
 874                  */
 875                 if (pl->pl_prop == (type == ZFS_TYPE_POOL ? ZPOOL_PROP_NAME :
 876                     ZFS_PROP_NAME) &&
 877                     pl->pl_width > cbp->cb_colwidths[GET_COL_NAME]) {
 878                         cbp->cb_colwidths[GET_COL_NAME] = pl->pl_width;
 879                         cbp->cb_colwidths[GET_COL_SOURCE] = pl->pl_width +
 880                             strlen(dgettext(TEXT_DOMAIN, "inherited from"));
 881                 }
 882         }
 883
 884         /*
 885          * Now go through and print the headers.
 886          */
 887         for (i = 0; i < ZFS_GET_NCOLS; i++) {
 888                 switch (cbp->cb_columns[i]) {
 889                 case GET_COL_NAME:
 890                         title = dgettext(TEXT_DOMAIN, "NAME");
 891                         break;
 892                 case GET_COL_PROPERTY:
 893                         title = dgettext(TEXT_DOMAIN, "PROPERTY");
 894                         break;
 895                 case GET_COL_VALUE:
 896                         title = dgettext(TEXT_DOMAIN, "VALUE");
 897                         break;
 898                 case GET_COL_RECVD:
 899                         title = dgettext(TEXT_DOMAIN, "RECEIVED");
 900                         break;
 901                 case GET_COL_SOURCE:
 902                         title = dgettext(TEXT_DOMAIN, "SOURCE");
 903                         break;
 904                 default:
 905                         title = NULL;
 906                 }
 907
 908                 if (title != NULL) {
 909                         if (i == (ZFS_GET_NCOLS - 1) ||
 910                             cbp->cb_columns[i + 1] == GET_COL_NONE)
 911                                 (void) printf("%s", title);
 912                         else
 913                                 (void) printf("%-*s  ",
 914                                     cbp->cb_colwidths[cbp->cb_columns[i]],
 915                                     title);
 916                 }
 917         }
 918         (void) printf("\n");
 919 }
 920
 921 /*
 922  * Display a single line of output, according to the settings in the callback
 923  * structure.
 924  */
 925 void
 926 zprop_print_one_property(const char *name, zprop_get_cbdata_t *cbp,
 927     const char *propname, const char *value, zprop_source_t sourcetype,
 928     const char *source, const char *recvd_value)
 929 {
 930         int i;
 931         const char *str;
 932         char buf[128];
 933
 934         /*
 935          * Ignore those source types that the user has chosen to ignore.
 936          */
 937         if ((sourcetype & cbp->cb_sources) == 0)
 938                 return;
 939
 940         if (cbp->cb_first)
 941                 zprop_print_headers(cbp, cbp->cb_type);
 942
 943         for (i = 0; i < ZFS_GET_NCOLS; i++) {
 944                 switch (cbp->cb_columns[i]) {
 945                 case GET_COL_NAME:
 946                         str = name;
 947                         break;
 948
 949                 case GET_COL_PROPERTY:
 950                         str = propname;
 951                         break;
 952
 953                 case GET_COL_VALUE:
 954                         str = value;
 955                         break;
 956
 957                 case GET_COL_SOURCE:
 958                         switch (sourcetype) {
 959                         case ZPROP_SRC_NONE:
 960                                 str = "-";
 961                                 break;
 962
 963                         case ZPROP_SRC_DEFAULT:
 964                                 str = "default";
 965                                 break;
 966
 967                         case ZPROP_SRC_LOCAL:
 968                                 str = "local";
 969                                 break;
 970
 971                         case ZPROP_SRC_TEMPORARY:
 972                                 str = "temporary";
 973                                 break;
 974
 975                         case ZPROP_SRC_INHERITED:
 976                                 (void) snprintf(buf, sizeof (buf),
 977                                     "inherited from %s", source);
 978                                 str = buf;
 979                                 break;
 980                         case ZPROP_SRC_RECEIVED:
 981                                 str = "received";
 982                                 break;
 983                         }
 984                         break;
 985
 986                 case GET_COL_RECVD:
 987                         str = (recvd_value == NULL ? "-" : recvd_value);
 988                         break;
 989
 990                 default:
 991                         continue;
 992                 }
 993
 994                 if (cbp->cb_columns[i + 1] == GET_COL_NONE)
 995                         (void) printf("%s", str);
 996                 else if (cbp->cb_scripted)
 997                         (void) printf("%s\t", str);
 998                 else
 999                         (void) printf("%-*s  ",
1000                             cbp->cb_colwidths[cbp->cb_columns[i]],
1001                             str);
1002         }
1003
1004         (void) printf("\n");
1005 }
1006
1007 /*
1008  * Given a numeric suffix, convert the value into a number of bits that the
1009  * resulting value must be shifted.
1010  */
1011 static int
1012 str2shift(libzfs_handle_t *hdl, const char *buf)
1013 {
1014         const char *ends = "BKMGTPEZ";
1015         int i;
1016
1017         if (buf[0] == '\0')
1018                 return (0);
1019         for (i = 0; i < strlen(ends); i++) {
1020                 if (toupper(buf[0]) == ends[i])
1021                         break;
1022         }
1023         if (i == strlen(ends)) {
1024                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1025                     "invalid numeric suffix '%s'"), buf);
1026                 return (-1);
1027         }
1028
1029         /*
1030          * We want to allow trailing 'b' characters for 'GB' or 'Mb'.  But don't
1031          * allow 'BB' - that's just weird.
1032          */
1033         if (buf[1] == '\0' || (toupper(buf[1]) == 'B' && buf[2] == '\0' &&
1034             toupper(buf[0]) != 'B'))
1035                 return (10*i);
1036
1037         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1038             "invalid numeric suffix '%s'"), buf);
1039         return (-1);
1040 }
1041
1042 /*
1043  * Convert a string of the form '100G' into a real number.  Used when setting
1044  * properties or creating a volume.  'buf' is used to place an extended error
1045  * message for the caller to use.
1046  */
1047 int
1048 zfs_nicestrtonum(libzfs_handle_t *hdl, const char *value, uint64_t *num)
1049 {
1050         char *end;
1051         int shift;
1052
1053         *num = 0;
1054
1055         /* Check to see if this looks like a number.  */
1056         if ((value[0] < '0' || value[0] > '9') && value[0] != '.') {
1057                 if (hdl)
1058                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1059                             "bad numeric value '%s'"), value);
1060                 return (-1);
1061         }
1062
1063         /* Rely on strtoull() to process the numeric portion.  */
1064         errno = 0;
1065         *num = strtoull(value, &end, 10);
1066
1067         /*
1068          * Check for ERANGE, which indicates that the value is too large to fit
1069          * in a 64-bit value.
1070          */
1071         if (errno == ERANGE) {
1072                 if (hdl)
1073                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1074                             "numeric value is too large"));
1075                 return (-1);
1076         }
1077
1078         /*
1079          * If we have a decimal value, then do the computation with floating
1080          * point arithmetic.  Otherwise, use standard arithmetic.
1081          */
1082         if (*end == '.') {
1083                 double fval = strtod(value, &end);
1084
1085                 if ((shift = str2shift(hdl, end)) == -1)
1086                         return (-1);
1087
1088                 fval *= pow(2, shift);
1089
1090                 if (fval > UINT64_MAX) {
1091                         if (hdl)
1092                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1093                                     "numeric value is too large"));
1094                         return (-1);
1095                 }
1096
1097                 *num = (uint64_t)fval;
1098         } else {
1099                 if ((shift = str2shift(hdl, end)) == -1)
1100                         return (-1);
1101
1102                 /* Check for overflow */
1103                 if (shift >= 64 || (*num << shift) >> shift != *num) {
1104                         if (hdl)
1105                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1106                                     "numeric value is too large"));
1107                         return (-1);
1108                 }
1109
1110                 *num <<= shift;
1111         }
1112
1113         return (0);
1114 }
1115
1116 /*
1117  * Given a propname=value nvpair to set, parse any numeric properties
1118  * (index, boolean, etc) if they are specified as strings and add the
1119  * resulting nvpair to the returned nvlist.
1120  *
1121  * At the DSL layer, all properties are either 64-bit numbers or strings.
1122  * We want the user to be able to ignore this fact and specify properties
1123  * as native values (numbers, for example) or as strings (to simplify
1124  * command line utilities).  This also handles converting index types
1125  * (compression, checksum, etc) from strings to their on-disk index.
1126  */
1127 int
1128 zprop_parse_value(libzfs_handle_t *hdl, nvpair_t *elem, int prop,
1129     zfs_type_t type, nvlist_t *ret, char **svalp, uint64_t *ivalp,
1130     const char *errbuf)
1131 {
1132         data_type_t datatype = nvpair_type(elem);
1133         zprop_type_t proptype;
1134         const char *propname;
1135         char *value;
1136         boolean_t isnone = B_FALSE;
1137
1138         if (type == ZFS_TYPE_POOL) {
1139                 proptype = zpool_prop_get_type(prop);
1140                 propname = zpool_prop_to_name(prop);
1141         } else {
1142                 proptype = zfs_prop_get_type(prop);
1143                 propname = zfs_prop_to_name(prop);
1144         }
1145
1146         /*
1147          * Convert any properties to the internal DSL value types.
1148          */
1149         *svalp = NULL;
1150         *ivalp = 0;
1151
1152         switch (proptype) {
1153         case PROP_TYPE_STRING:
1154                 if (datatype != DATA_TYPE_STRING) {
1155                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1156                             "'%s' must be a string"), nvpair_name(elem));
1157                         goto error;
1158                 }
1159                 (void) nvpair_value_string(elem, svalp);
1160                 if (strlen(*svalp) >= ZFS_MAXPROPLEN) {
1161                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1162                             "'%s' is too long"), nvpair_name(elem));
1163                         goto error;
1164                 }
1165                 break;
1166
1167         case PROP_TYPE_NUMBER:
1168                 if (datatype == DATA_TYPE_STRING) {
1169                         (void) nvpair_value_string(elem, &value);
1170                         if (strcmp(value, "none") == 0) {
1171                                 isnone = B_TRUE;
1172                         } else if (zfs_nicestrtonum(hdl, value, ivalp)
1173                             != 0) {
1174                                 goto error;
1175                         }
1176                 } else if (datatype == DATA_TYPE_UINT64) {
1177                         (void) nvpair_value_uint64(elem, ivalp);
1178                 } else {
1179                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1180                             "'%s' must be a number"), nvpair_name(elem));
1181                         goto error;
1182                 }
1183
1184                 /*
1185                  * Quota special: force 'none' and don't allow 0.
1186                  */
1187                 if ((type & ZFS_TYPE_DATASET) && *ivalp == 0 && !isnone &&
1188                     (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_REFQUOTA)) {
1189                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1190                             "use 'none' to disable quota/refquota"));
1191                         goto error;
1192                 }
1193                 break;
1194
1195         case PROP_TYPE_INDEX:
1196                 if (datatype != DATA_TYPE_STRING) {
1197                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1198                             "'%s' must be a string"), nvpair_name(elem));
1199                         goto error;
1200                 }
1201
1202                 (void) nvpair_value_string(elem, &value);
1203
1204                 if (zprop_string_to_index(prop, value, ivalp, type) != 0) {
1205                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1206                             "'%s' must be one of '%s'"), propname,
1207                             zprop_values(prop, type));
1208                         goto error;
1209                 }
1210                 break;
1211
1212         default:
1213                 abort();
1214         }
1215
1216         /*
1217          * Add the result to our return set of properties.
1218          */
1219         if (*svalp != NULL) {
1220                 if (nvlist_add_string(ret, propname, *svalp) != 0) {
1221                         (void) no_memory(hdl);
1222                         return (-1);
1223                 }
1224         } else {
1225                 if (nvlist_add_uint64(ret, propname, *ivalp) != 0) {
1226                         (void) no_memory(hdl);
1227                         return (-1);
1228                 }
1229         }
1230
1231         return (0);
1232 error:
1233         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1234         return (-1);
1235 }
1236
1237 static int
1238 addlist(libzfs_handle_t *hdl, char *propname, zprop_list_t **listp,
1239     zfs_type_t type)
1240 {
1241         int prop;
1242         zprop_list_t *entry;
1243
1244         prop = zprop_name_to_prop(propname, type);
1245
1246         if (prop != ZPROP_INVAL && !zprop_valid_for_type(prop, type))
1247                 prop = ZPROP_INVAL;
1248
1249         /*
1250          * When no property table entry can be found, return failure if
1251          * this is a pool property or if this isn't a user-defined
1252          * dataset property,
1253          */
1254         if (prop == ZPROP_INVAL && (type == ZFS_TYPE_POOL ||
1255             (!zfs_prop_user(propname) && !zfs_prop_userquota(propname)))) {
1256                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1257                     "invalid property '%s'"), propname);
1258                 return (zfs_error(hdl, EZFS_BADPROP,
1259                     dgettext(TEXT_DOMAIN, "bad property list")));
1260         }
1261
1262         if ((entry = zfs_alloc(hdl, sizeof (zprop_list_t))) == NULL)
1263                 return (-1);
1264
1265         entry->pl_prop = prop;
1266         if (prop == ZPROP_INVAL) {
1267                 if ((entry->pl_user_prop = zfs_strdup(hdl, propname)) == NULL) {
1268                         free(entry);
1269                         return (-1);
1270                 }
1271                 entry->pl_width = strlen(propname);
1272         } else {
1273                 entry->pl_width = zprop_width(prop, &entry->pl_fixed,
1274                     type);
1275         }
1276
1277         *listp = entry;
1278
1279         return (0);
1280 }
1281
1282 /*
1283  * Given a comma-separated list of properties, construct a property list
1284  * containing both user-defined and native properties.  This function will
1285  * return a NULL list if 'all' is specified, which can later be expanded
1286  * by zprop_expand_list().
1287  */
1288 int
1289 zprop_get_list(libzfs_handle_t *hdl, char *props, zprop_list_t **listp,
1290     zfs_type_t type)
1291 {
1292         *listp = NULL;
1293
1294         /*
1295          * If 'all' is specified, return a NULL list.
1296          */
1297         if (strcmp(props, "all") == 0)
1298                 return (0);
1299
1300         /*
1301          * If no props were specified, return an error.
1302          */
1303         if (props[0] == '\0') {
1304                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1305                     "no properties specified"));
1306                 return (zfs_error(hdl, EZFS_BADPROP, dgettext(TEXT_DOMAIN,
1307                     "bad property list")));
1308         }
1309
1310         /*
1311          * It would be nice to use getsubopt() here, but the inclusion of column
1312          * aliases makes this more effort than it's worth.
1313          */
1314         while (*props != '\0') {
1315                 size_t len;
1316                 char *p;
1317                 char c;
1318
1319                 if ((p = strchr(props, ',')) == NULL) {
1320                         len = strlen(props);
1321                         p = props + len;
1322                 } else {
1323                         len = p - props;
1324                 }
1325
1326                 /*
1327                  * Check for empty options.
1328                  */
1329                 if (len == 0) {
1330                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1331                             "empty property name"));
1332                         return (zfs_error(hdl, EZFS_BADPROP,
1333                             dgettext(TEXT_DOMAIN, "bad property list")));
1334                 }
1335
1336                 /*
1337                  * Check all regular property names.
1338                  */
1339                 c = props[len];
1340                 props[len] = '\0';
1341
1342                 if (strcmp(props, "space") == 0) {
1343                         static char *spaceprops[] = {
1344                                 "name", "avail", "used", "usedbysnapshots",
1345                                 "usedbydataset", "usedbyrefreservation",
1346                                 "usedbychildren", NULL
1347                         };
1348                         int i;
1349
1350                         for (i = 0; spaceprops[i]; i++) {
1351                                 if (addlist(hdl, spaceprops[i], listp, type))
1352                                         return (-1);
1353                                 listp = &(*listp)->pl_next;
1354                         }
1355                 } else {
1356                         if (addlist(hdl, props, listp, type))
1357                                 return (-1);
1358                         listp = &(*listp)->pl_next;
1359                 }
1360
1361                 props = p;
1362                 if (c == ',')
1363                         props++;
1364         }
1365
1366         return (0);
1367 }
1368
1369 void
1370 zprop_free_list(zprop_list_t *pl)
1371 {
1372         zprop_list_t *next;
1373
1374         while (pl != NULL) {
1375                 next = pl->pl_next;
1376                 free(pl->pl_user_prop);
1377                 free(pl);
1378                 pl = next;
1379         }
1380 }
1381
1382 typedef struct expand_data {
1383         zprop_list_t    **last;
1384         libzfs_handle_t *hdl;
1385         zfs_type_t type;
1386 } expand_data_t;
1387
1388 int
1389 zprop_expand_list_cb(int prop, void *cb)
1390 {
1391         zprop_list_t *entry;
1392         expand_data_t *edp = cb;
1393
1394         if ((entry = zfs_alloc(edp->hdl, sizeof (zprop_list_t))) == NULL)
1395                 return (ZPROP_INVAL);
1396
1397         entry->pl_prop = prop;
1398         entry->pl_width = zprop_width(prop, &entry->pl_fixed, edp->type);
1399         entry->pl_all = B_TRUE;
1400
1401         *(edp->last) = entry;
1402         edp->last = &entry->pl_next;
1403
1404         return (ZPROP_CONT);
1405 }
1406
1407 int
1408 zprop_expand_list(libzfs_handle_t *hdl, zprop_list_t **plp, zfs_type_t type)
1409 {
1410         zprop_list_t *entry;
1411         zprop_list_t **last;
1412         expand_data_t exp;
1413
1414         if (*plp == NULL) {
1415                 /*
1416                  * If this is the very first time we've been called for an 'all'
1417                  * specification, expand the list to include all native
1418                  * properties.
1419                  */
1420                 last = plp;
1421
1422                 exp.last = last;
1423                 exp.hdl = hdl;
1424                 exp.type = type;
1425
1426                 if (zprop_iter_common(zprop_expand_list_cb, &exp, B_FALSE,
1427                     B_FALSE, type) == ZPROP_INVAL)
1428                         return (-1);
1429
1430                 /*
1431                  * Add 'name' to the beginning of the list, which is handled
1432                  * specially.
1433                  */
1434                 if ((entry = zfs_alloc(hdl, sizeof (zprop_list_t))) == NULL)
1435                         return (-1);
1436
1437                 entry->pl_prop = (type == ZFS_TYPE_POOL) ?  ZPOOL_PROP_NAME :
1438                     ZFS_PROP_NAME;
1439                 entry->pl_width = zprop_width(entry->pl_prop,
1440                     &entry->pl_fixed, type);
1441                 entry->pl_all = B_TRUE;
1442                 entry->pl_next = *plp;
1443                 *plp = entry;
1444         }
1445         return (0);
1446 }
1447
1448 int
1449 zprop_iter(zprop_func func, void *cb, boolean_t show_all, boolean_t ordered,
1450     zfs_type_t type)
1451 {
1452         return (zprop_iter_common(func, cb, show_all, ordered, type));
1453 }