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 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*
27  * Internal utility routines for the ZFS library.
28  */
29 
30 #include <errno.h>
31 #include <fcntl.h>
32 #include <libintl.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <strings.h>
37 #include <unistd.h>
38 #include <ctype.h>
39 #include <math.h>
40 #include <sys/mnttab.h>
41 #include <sys/mntent.h>
42 #include <sys/types.h>
43 
44 #include <libzfs.h>
45 
46 #include "libzfs_impl.h"
47 #include "zfs_prop.h"
48 
49 int
50 libzfs_errno(libzfs_handle_t *hdl)
51 {
52 	return (hdl->libzfs_error);
53 }
54 
55 const char *
56 libzfs_error_action(libzfs_handle_t *hdl)
57 {
58 	return (hdl->libzfs_action);
59 }
60 
61 const char *
62 libzfs_error_description(libzfs_handle_t *hdl)
63 {
64 	if (hdl->libzfs_desc[0] != '\0')
65 		return (hdl->libzfs_desc);
66 
67 	switch (hdl->libzfs_error) {
68 	case EZFS_NOMEM:
69 		return (dgettext(TEXT_DOMAIN, "out of memory"));
70 	case EZFS_BADPROP:
71 		return (dgettext(TEXT_DOMAIN, "invalid property value"));
72 	case EZFS_PROPREADONLY:
73 		return (dgettext(TEXT_DOMAIN, "read only property"));
74 	case EZFS_PROPTYPE:
75 		return (dgettext(TEXT_DOMAIN, "property doesn't apply to "
76 		    "datasets of this type"));
77 	case EZFS_PROPNONINHERIT:
78 		return (dgettext(TEXT_DOMAIN, "property cannot be inherited"));
79 	case EZFS_PROPSPACE:
80 		return (dgettext(TEXT_DOMAIN, "invalid quota or reservation"));
81 	case EZFS_BADTYPE:
82 		return (dgettext(TEXT_DOMAIN, "operation not applicable to "
83 		    "datasets of this type"));
84 	case EZFS_BUSY:
85 		return (dgettext(TEXT_DOMAIN, "pool or dataset is busy"));
86 	case EZFS_EXISTS:
87 		return (dgettext(TEXT_DOMAIN, "pool or dataset exists"));
88 	case EZFS_NOENT:
89 		return (dgettext(TEXT_DOMAIN, "no such pool or dataset"));
90 	case EZFS_BADSTREAM:
91 		return (dgettext(TEXT_DOMAIN, "invalid backup stream"));
92 	case EZFS_DSREADONLY:
93 		return (dgettext(TEXT_DOMAIN, "dataset is read only"));
94 	case EZFS_VOLTOOBIG:
95 		return (dgettext(TEXT_DOMAIN, "volume size exceeds limit for "
96 		    "this system"));
97 	case EZFS_VOLHASDATA:
98 		return (dgettext(TEXT_DOMAIN, "volume has data"));
99 	case EZFS_INVALIDNAME:
100 		return (dgettext(TEXT_DOMAIN, "invalid name"));
101 	case EZFS_BADRESTORE:
102 		return (dgettext(TEXT_DOMAIN, "unable to restore to "
103 		    "destination"));
104 	case EZFS_BADBACKUP:
105 		return (dgettext(TEXT_DOMAIN, "backup failed"));
106 	case EZFS_BADTARGET:
107 		return (dgettext(TEXT_DOMAIN, "invalid target vdev"));
108 	case EZFS_NODEVICE:
109 		return (dgettext(TEXT_DOMAIN, "no such device in pool"));
110 	case EZFS_BADDEV:
111 		return (dgettext(TEXT_DOMAIN, "invalid device"));
112 	case EZFS_NOREPLICAS:
113 		return (dgettext(TEXT_DOMAIN, "no valid replicas"));
114 	case EZFS_RESILVERING:
115 		return (dgettext(TEXT_DOMAIN, "currently resilvering"));
116 	case EZFS_BADVERSION:
117 		return (dgettext(TEXT_DOMAIN, "unsupported version"));
118 	case EZFS_POOLUNAVAIL:
119 		return (dgettext(TEXT_DOMAIN, "pool is unavailable"));
120 	case EZFS_DEVOVERFLOW:
121 		return (dgettext(TEXT_DOMAIN, "too many devices in one vdev"));
122 	case EZFS_BADPATH:
123 		return (dgettext(TEXT_DOMAIN, "must be an absolute path"));
124 	case EZFS_CROSSTARGET:
125 		return (dgettext(TEXT_DOMAIN, "operation crosses datasets or "
126 		    "pools"));
127 	case EZFS_ZONED:
128 		return (dgettext(TEXT_DOMAIN, "dataset in use by local zone"));
129 	case EZFS_MOUNTFAILED:
130 		return (dgettext(TEXT_DOMAIN, "mount failed"));
131 	case EZFS_UMOUNTFAILED:
132 		return (dgettext(TEXT_DOMAIN, "umount failed"));
133 	case EZFS_UNSHARENFSFAILED:
134 		return (dgettext(TEXT_DOMAIN, "unshare(1M) failed"));
135 	case EZFS_SHARENFSFAILED:
136 		return (dgettext(TEXT_DOMAIN, "share(1M) failed"));
137 	case EZFS_UNSHARESMBFAILED:
138 		return (dgettext(TEXT_DOMAIN, "smb remove share failed"));
139 	case EZFS_SHARESMBFAILED:
140 		return (dgettext(TEXT_DOMAIN, "smb add share failed"));
141 	case EZFS_ISCSISVCUNAVAIL:
142 		return (dgettext(TEXT_DOMAIN,
143 		    "iscsitgt service need to be enabled by "
144 		    "a privileged user"));
145 	case EZFS_DEVLINKS:
146 		return (dgettext(TEXT_DOMAIN, "failed to create /dev links"));
147 	case EZFS_PERM:
148 		return (dgettext(TEXT_DOMAIN, "permission denied"));
149 	case EZFS_NOSPC:
150 		return (dgettext(TEXT_DOMAIN, "out of space"));
151 	case EZFS_IO:
152 		return (dgettext(TEXT_DOMAIN, "I/O error"));
153 	case EZFS_INTR:
154 		return (dgettext(TEXT_DOMAIN, "signal received"));
155 	case EZFS_ISSPARE:
156 		return (dgettext(TEXT_DOMAIN, "device is reserved as a hot "
157 		    "spare"));
158 	case EZFS_INVALCONFIG:
159 		return (dgettext(TEXT_DOMAIN, "invalid vdev configuration"));
160 	case EZFS_RECURSIVE:
161 		return (dgettext(TEXT_DOMAIN, "recursive dataset dependency"));
162 	case EZFS_NOHISTORY:
163 		return (dgettext(TEXT_DOMAIN, "no history available"));
164 	case EZFS_UNSHAREISCSIFAILED:
165 		return (dgettext(TEXT_DOMAIN,
166 		    "iscsitgtd failed request to unshare"));
167 	case EZFS_SHAREISCSIFAILED:
168 		return (dgettext(TEXT_DOMAIN,
169 		    "iscsitgtd failed request to share"));
170 	case EZFS_POOLPROPS:
171 		return (dgettext(TEXT_DOMAIN, "failed to retrieve "
172 		    "pool properties"));
173 	case EZFS_POOL_NOTSUP:
174 		return (dgettext(TEXT_DOMAIN, "operation not supported "
175 		    "on this type of pool"));
176 	case EZFS_POOL_INVALARG:
177 		return (dgettext(TEXT_DOMAIN, "invalid argument for "
178 		    "this pool operation"));
179 	case EZFS_NAMETOOLONG:
180 		return (dgettext(TEXT_DOMAIN, "dataset name is too long"));
181 	case EZFS_OPENFAILED:
182 		return (dgettext(TEXT_DOMAIN, "open failed"));
183 	case EZFS_NOCAP:
184 		return (dgettext(TEXT_DOMAIN,
185 		    "disk capacity information could not be retrieved"));
186 	case EZFS_LABELFAILED:
187 		return (dgettext(TEXT_DOMAIN, "write of label failed"));
188 	case EZFS_BADWHO:
189 		return (dgettext(TEXT_DOMAIN, "invalid user/group"));
190 	case EZFS_BADPERM:
191 		return (dgettext(TEXT_DOMAIN, "invalid permission"));
192 	case EZFS_BADPERMSET:
193 		return (dgettext(TEXT_DOMAIN, "invalid permission set name"));
194 	case EZFS_NODELEGATION:
195 		return (dgettext(TEXT_DOMAIN, "delegated administration is "
196 		    "disabled on pool"));
197 	case EZFS_PERMRDONLY:
198 		return (dgettext(TEXT_DOMAIN, "snapshot permissions cannot be"
199 		    " modified"));
200 	case EZFS_BADCACHE:
201 		return (dgettext(TEXT_DOMAIN, "invalid or missing cache file"));
202 	case EZFS_ISL2CACHE:
203 		return (dgettext(TEXT_DOMAIN, "device is in use as a cache"));
204 	case EZFS_VDEVNOTSUP:
205 		return (dgettext(TEXT_DOMAIN, "vdev specification is not "
206 		    "supported"));
207 	case EZFS_NOTSUP:
208 		return (dgettext(TEXT_DOMAIN, "operation not supported "
209 		    "on this dataset"));
210 	case EZFS_ACTIVE_SPARE:
211 		return (dgettext(TEXT_DOMAIN, "pool has active shared spare "
212 		    "device"));
213 	case EZFS_UNPLAYED_LOGS:
214 		return (dgettext(TEXT_DOMAIN, "log device has unplayed intent "
215 		    "logs"));
216 	case EZFS_UNKNOWN:
217 		return (dgettext(TEXT_DOMAIN, "unknown error"));
218 	default:
219 		assert(hdl->libzfs_error == 0);
220 		return (dgettext(TEXT_DOMAIN, "no error"));
221 	}
222 }
223 
224 /*PRINTFLIKE2*/
225 void
226 zfs_error_aux(libzfs_handle_t *hdl, const char *fmt, ...)
227 {
228 	va_list ap;
229 
230 	va_start(ap, fmt);
231 
232 	(void) vsnprintf(hdl->libzfs_desc, sizeof (hdl->libzfs_desc),
233 	    fmt, ap);
234 	hdl->libzfs_desc_active = 1;
235 
236 	va_end(ap);
237 }
238 
239 static void
240 zfs_verror(libzfs_handle_t *hdl, int error, const char *fmt, va_list ap)
241 {
242 	(void) vsnprintf(hdl->libzfs_action, sizeof (hdl->libzfs_action),
243 	    fmt, ap);
244 	hdl->libzfs_error = error;
245 
246 	if (hdl->libzfs_desc_active)
247 		hdl->libzfs_desc_active = 0;
248 	else
249 		hdl->libzfs_desc[0] = '\0';
250 
251 	if (hdl->libzfs_printerr) {
252 		if (error == EZFS_UNKNOWN) {
253 			(void) fprintf(stderr, dgettext(TEXT_DOMAIN, "internal "
254 			    "error: %s\n"), libzfs_error_description(hdl));
255 			abort();
256 		}
257 
258 		(void) fprintf(stderr, "%s: %s\n", hdl->libzfs_action,
259 		    libzfs_error_description(hdl));
260 		if (error == EZFS_NOMEM)
261 			exit(1);
262 	}
263 }
264 
265 int
266 zfs_error(libzfs_handle_t *hdl, int error, const char *msg)
267 {
268 	return (zfs_error_fmt(hdl, error, "%s", msg));
269 }
270 
271 /*PRINTFLIKE3*/
272 int
273 zfs_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
274 {
275 	va_list ap;
276 
277 	va_start(ap, fmt);
278 
279 	zfs_verror(hdl, error, fmt, ap);
280 
281 	va_end(ap);
282 
283 	return (-1);
284 }
285 
286 static int
287 zfs_common_error(libzfs_handle_t *hdl, int error, const char *fmt,
288     va_list ap)
289 {
290 	switch (error) {
291 	case EPERM:
292 	case EACCES:
293 		zfs_verror(hdl, EZFS_PERM, fmt, ap);
294 		return (-1);
295 
296 	case ECANCELED:
297 		zfs_verror(hdl, EZFS_NODELEGATION, fmt, ap);
298 		return (-1);
299 
300 	case EIO:
301 		zfs_verror(hdl, EZFS_IO, fmt, ap);
302 		return (-1);
303 
304 	case EINTR:
305 		zfs_verror(hdl, EZFS_INTR, fmt, ap);
306 		return (-1);
307 	}
308 
309 	return (0);
310 }
311 
312 int
313 zfs_standard_error(libzfs_handle_t *hdl, int error, const char *msg)
314 {
315 	return (zfs_standard_error_fmt(hdl, error, "%s", msg));
316 }
317 
318 /*PRINTFLIKE3*/
319 int
320 zfs_standard_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
321 {
322 	va_list ap;
323 
324 	va_start(ap, fmt);
325 
326 	if (zfs_common_error(hdl, error, fmt, ap) != 0) {
327 		va_end(ap);
328 		return (-1);
329 	}
330 
331 	switch (error) {
332 	case ENXIO:
333 	case ENODEV:
334 		zfs_verror(hdl, EZFS_IO, fmt, ap);
335 		break;
336 
337 	case ENOENT:
338 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
339 		    "dataset does not exist"));
340 		zfs_verror(hdl, EZFS_NOENT, fmt, ap);
341 		break;
342 
343 	case ENOSPC:
344 	case EDQUOT:
345 		zfs_verror(hdl, EZFS_NOSPC, fmt, ap);
346 		return (-1);
347 
348 	case EEXIST:
349 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
350 		    "dataset already exists"));
351 		zfs_verror(hdl, EZFS_EXISTS, fmt, ap);
352 		break;
353 
354 	case EBUSY:
355 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
356 		    "dataset is busy"));
357 		zfs_verror(hdl, EZFS_BUSY, fmt, ap);
358 		break;
359 	case EROFS:
360 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
361 		    "snapshot permissions cannot be modified"));
362 		zfs_verror(hdl, EZFS_PERMRDONLY, fmt, ap);
363 		break;
364 	case ENAMETOOLONG:
365 		zfs_verror(hdl, EZFS_NAMETOOLONG, fmt, ap);
366 		break;
367 	case ENOTSUP:
368 		zfs_verror(hdl, EZFS_BADVERSION, fmt, ap);
369 		break;
370 	case EAGAIN:
371 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
372 		    "pool I/O is currently suspended"));
373 		zfs_verror(hdl, EZFS_POOLUNAVAIL, fmt, ap);
374 		break;
375 	default:
376 		zfs_error_aux(hdl, strerror(errno));
377 		zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap);
378 		break;
379 	}
380 
381 	va_end(ap);
382 	return (-1);
383 }
384 
385 int
386 zpool_standard_error(libzfs_handle_t *hdl, int error, const char *msg)
387 {
388 	return (zpool_standard_error_fmt(hdl, error, "%s", msg));
389 }
390 
391 /*PRINTFLIKE3*/
392 int
393 zpool_standard_error_fmt(libzfs_handle_t *hdl, int error, const char *fmt, ...)
394 {
395 	va_list ap;
396 
397 	va_start(ap, fmt);
398 
399 	if (zfs_common_error(hdl, error, fmt, ap) != 0) {
400 		va_end(ap);
401 		return (-1);
402 	}
403 
404 	switch (error) {
405 	case ENODEV:
406 		zfs_verror(hdl, EZFS_NODEVICE, fmt, ap);
407 		break;
408 
409 	case ENOENT:
410 		zfs_error_aux(hdl,
411 		    dgettext(TEXT_DOMAIN, "no such pool or dataset"));
412 		zfs_verror(hdl, EZFS_NOENT, fmt, ap);
413 		break;
414 
415 	case EEXIST:
416 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
417 		    "pool already exists"));
418 		zfs_verror(hdl, EZFS_EXISTS, fmt, ap);
419 		break;
420 
421 	case EBUSY:
422 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool is busy"));
423 		zfs_verror(hdl, EZFS_BUSY, fmt, ap);
424 		break;
425 
426 	case ENXIO:
427 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
428 		    "one or more devices is currently unavailable"));
429 		zfs_verror(hdl, EZFS_BADDEV, fmt, ap);
430 		break;
431 
432 	case ENAMETOOLONG:
433 		zfs_verror(hdl, EZFS_DEVOVERFLOW, fmt, ap);
434 		break;
435 
436 	case ENOTSUP:
437 		zfs_verror(hdl, EZFS_POOL_NOTSUP, fmt, ap);
438 		break;
439 
440 	case EINVAL:
441 		zfs_verror(hdl, EZFS_POOL_INVALARG, fmt, ap);
442 		break;
443 
444 	case ENOSPC:
445 	case EDQUOT:
446 		zfs_verror(hdl, EZFS_NOSPC, fmt, ap);
447 		return (-1);
448 	case EAGAIN:
449 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
450 		    "pool I/O is currently suspended"));
451 		zfs_verror(hdl, EZFS_POOLUNAVAIL, fmt, ap);
452 		break;
453 
454 	default:
455 		zfs_error_aux(hdl, strerror(error));
456 		zfs_verror(hdl, EZFS_UNKNOWN, fmt, ap);
457 	}
458 
459 	va_end(ap);
460 	return (-1);
461 }
462 
463 /*
464  * Display an out of memory error message and abort the current program.
465  */
466 int
467 no_memory(libzfs_handle_t *hdl)
468 {
469 	return (zfs_error(hdl, EZFS_NOMEM, "internal error"));
470 }
471 
472 /*
473  * A safe form of malloc() which will die if the allocation fails.
474  */
475 void *
476 zfs_alloc(libzfs_handle_t *hdl, size_t size)
477 {
478 	void *data;
479 
480 	if ((data = calloc(1, size)) == NULL)
481 		(void) no_memory(hdl);
482 
483 	return (data);
484 }
485 
486 /*
487  * A safe form of realloc(), which also zeroes newly allocated space.
488  */
489 void *
490 zfs_realloc(libzfs_handle_t *hdl, void *ptr, size_t oldsize, size_t newsize)
491 {
492 	void *ret;
493 
494 	if ((ret = realloc(ptr, newsize)) == NULL) {
495 		(void) no_memory(hdl);
496 		return (NULL);
497 	}
498 
499 	bzero((char *)ret + oldsize, (newsize - oldsize));
500 	return (ret);
501 }
502 
503 /*
504  * A safe form of strdup() which will die if the allocation fails.
505  */
506 char *
507 zfs_strdup(libzfs_handle_t *hdl, const char *str)
508 {
509 	char *ret;
510 
511 	if ((ret = strdup(str)) == NULL)
512 		(void) no_memory(hdl);
513 
514 	return (ret);
515 }
516 
517 /*
518  * Convert a number to an appropriately human-readable output.
519  */
520 void
521 zfs_nicenum(uint64_t num, char *buf, size_t buflen)
522 {
523 	uint64_t n = num;
524 	int index = 0;
525 	char u;
526 
527 	while (n >= 1024) {
528 		n /= 1024;
529 		index++;
530 	}
531 
532 	u = " KMGTPE"[index];
533 
534 	if (index == 0) {
535 		(void) snprintf(buf, buflen, "%llu", n);
536 	} else if ((num & ((1ULL << 10 * index) - 1)) == 0) {
537 		/*
538 		 * If this is an even multiple of the base, always display
539 		 * without any decimal precision.
540 		 */
541 		(void) snprintf(buf, buflen, "%llu%c", n, u);
542 	} else {
543 		/*
544 		 * We want to choose a precision that reflects the best choice
545 		 * for fitting in 5 characters.  This can get rather tricky when
546 		 * we have numbers that are very close to an order of magnitude.
547 		 * For example, when displaying 10239 (which is really 9.999K),
548 		 * we want only a single place of precision for 10.0K.  We could
549 		 * develop some complex heuristics for this, but it's much
550 		 * easier just to try each combination in turn.
551 		 */
552 		int i;
553 		for (i = 2; i >= 0; i--) {
554 			if (snprintf(buf, buflen, "%.*f%c", i,
555 			    (double)num / (1ULL << 10 * index), u) <= 5)
556 				break;
557 		}
558 	}
559 }
560 
561 void
562 libzfs_print_on_error(libzfs_handle_t *hdl, boolean_t printerr)
563 {
564 	hdl->libzfs_printerr = printerr;
565 }
566 
567 libzfs_handle_t *
568 libzfs_init(void)
569 {
570 	libzfs_handle_t *hdl;
571 
572 	if ((hdl = calloc(sizeof (libzfs_handle_t), 1)) == NULL) {
573 		return (NULL);
574 	}
575 
576 	if ((hdl->libzfs_fd = open(ZFS_DEV, O_RDWR)) < 0) {
577 		free(hdl);
578 		return (NULL);
579 	}
580 
581 	if ((hdl->libzfs_mnttab = fopen(MNTTAB, "r")) == NULL) {
582 		(void) close(hdl->libzfs_fd);
583 		free(hdl);
584 		return (NULL);
585 	}
586 
587 	hdl->libzfs_sharetab = fopen("/etc/dfs/sharetab", "r");
588 
589 	zfs_prop_init();
590 	zpool_prop_init();
591 	libzfs_mnttab_init(hdl);
592 
593 	return (hdl);
594 }
595 
596 void
597 libzfs_fini(libzfs_handle_t *hdl)
598 {
599 	(void) close(hdl->libzfs_fd);
600 	if (hdl->libzfs_mnttab)
601 		(void) fclose(hdl->libzfs_mnttab);
602 	if (hdl->libzfs_sharetab)
603 		(void) fclose(hdl->libzfs_sharetab);
604 	zfs_uninit_libshare(hdl);
605 	if (hdl->libzfs_log_str)
606 		(void) free(hdl->libzfs_log_str);
607 	zpool_free_handles(hdl);
608 	namespace_clear(hdl);
609 	libzfs_mnttab_fini(hdl);
610 	free(hdl);
611 }
612 
613 libzfs_handle_t *
614 zpool_get_handle(zpool_handle_t *zhp)
615 {
616 	return (zhp->zpool_hdl);
617 }
618 
619 libzfs_handle_t *
620 zfs_get_handle(zfs_handle_t *zhp)
621 {
622 	return (zhp->zfs_hdl);
623 }
624 
625 zpool_handle_t *
626 zfs_get_pool_handle(const zfs_handle_t *zhp)
627 {
628 	return (zhp->zpool_hdl);
629 }
630 
631 /*
632  * Given a name, determine whether or not it's a valid path
633  * (starts with '/' or "./").  If so, walk the mnttab trying
634  * to match the device number.  If not, treat the path as an
635  * fs/vol/snap name.
636  */
637 zfs_handle_t *
638 zfs_path_to_zhandle(libzfs_handle_t *hdl, char *path, zfs_type_t argtype)
639 {
640 	struct stat64 statbuf;
641 	struct extmnttab entry;
642 	int ret;
643 
644 	if (path[0] != '/' && strncmp(path, "./", strlen("./")) != 0) {
645 		/*
646 		 * It's not a valid path, assume it's a name of type 'argtype'.
647 		 */
648 		return (zfs_open(hdl, path, argtype));
649 	}
650 
651 	if (stat64(path, &statbuf) != 0) {
652 		(void) fprintf(stderr, "%s: %s\n", path, strerror(errno));
653 		return (NULL);
654 	}
655 
656 	rewind(hdl->libzfs_mnttab);
657 	while ((ret = getextmntent(hdl->libzfs_mnttab, &entry, 0)) == 0) {
658 		if (makedevice(entry.mnt_major, entry.mnt_minor) ==
659 		    statbuf.st_dev) {
660 			break;
661 		}
662 	}
663 	if (ret != 0) {
664 		return (NULL);
665 	}
666 
667 	if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
668 		(void) fprintf(stderr, gettext("'%s': not a ZFS filesystem\n"),
669 		    path);
670 		return (NULL);
671 	}
672 
673 	return (zfs_open(hdl, entry.mnt_special, ZFS_TYPE_FILESYSTEM));
674 }
675 
676 /*
677  * Initialize the zc_nvlist_dst member to prepare for receiving an nvlist from
678  * an ioctl().
679  */
680 int
681 zcmd_alloc_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, size_t len)
682 {
683 	if (len == 0)
684 		len = 2048;
685 	zc->zc_nvlist_dst_size = len;
686 	if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
687 	    zfs_alloc(hdl, zc->zc_nvlist_dst_size)) == NULL)
688 		return (-1);
689 
690 	return (0);
691 }
692 
693 /*
694  * Called when an ioctl() which returns an nvlist fails with ENOMEM.  This will
695  * expand the nvlist to the size specified in 'zc_nvlist_dst_size', which was
696  * filled in by the kernel to indicate the actual required size.
697  */
698 int
699 zcmd_expand_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc)
700 {
701 	free((void *)(uintptr_t)zc->zc_nvlist_dst);
702 	if ((zc->zc_nvlist_dst = (uint64_t)(uintptr_t)
703 	    zfs_alloc(hdl, zc->zc_nvlist_dst_size))
704 	    == NULL)
705 		return (-1);
706 
707 	return (0);
708 }
709 
710 /*
711  * Called to free the src and dst nvlists stored in the command structure.
712  */
713 void
714 zcmd_free_nvlists(zfs_cmd_t *zc)
715 {
716 	free((void *)(uintptr_t)zc->zc_nvlist_conf);
717 	free((void *)(uintptr_t)zc->zc_nvlist_src);
718 	free((void *)(uintptr_t)zc->zc_nvlist_dst);
719 }
720 
721 static int
722 zcmd_write_nvlist_com(libzfs_handle_t *hdl, uint64_t *outnv, uint64_t *outlen,
723     nvlist_t *nvl)
724 {
725 	char *packed;
726 	size_t len;
727 
728 	verify(nvlist_size(nvl, &len, NV_ENCODE_NATIVE) == 0);
729 
730 	if ((packed = zfs_alloc(hdl, len)) == NULL)
731 		return (-1);
732 
733 	verify(nvlist_pack(nvl, &packed, &len, NV_ENCODE_NATIVE, 0) == 0);
734 
735 	*outnv = (uint64_t)(uintptr_t)packed;
736 	*outlen = len;
737 
738 	return (0);
739 }
740 
741 int
742 zcmd_write_conf_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl)
743 {
744 	return (zcmd_write_nvlist_com(hdl, &zc->zc_nvlist_conf,
745 	    &zc->zc_nvlist_conf_size, nvl));
746 }
747 
748 int
749 zcmd_write_src_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t *nvl)
750 {
751 	return (zcmd_write_nvlist_com(hdl, &zc->zc_nvlist_src,
752 	    &zc->zc_nvlist_src_size, nvl));
753 }
754 
755 /*
756  * Unpacks an nvlist from the ZFS ioctl command structure.
757  */
758 int
759 zcmd_read_dst_nvlist(libzfs_handle_t *hdl, zfs_cmd_t *zc, nvlist_t **nvlp)
760 {
761 	if (nvlist_unpack((void *)(uintptr_t)zc->zc_nvlist_dst,
762 	    zc->zc_nvlist_dst_size, nvlp, 0) != 0)
763 		return (no_memory(hdl));
764 
765 	return (0);
766 }
767 
768 int
769 zfs_ioctl(libzfs_handle_t *hdl, int request, zfs_cmd_t *zc)
770 {
771 	int error;
772 
773 	zc->zc_history = (uint64_t)(uintptr_t)hdl->libzfs_log_str;
774 	error = ioctl(hdl->libzfs_fd, request, zc);
775 	if (hdl->libzfs_log_str) {
776 		free(hdl->libzfs_log_str);
777 		hdl->libzfs_log_str = NULL;
778 	}
779 	zc->zc_history = 0;
780 
781 	return (error);
782 }
783 
784 /*
785  * ================================================================
786  * API shared by zfs and zpool property management
787  * ================================================================
788  */
789 
790 static void
791 zprop_print_headers(zprop_get_cbdata_t *cbp, zfs_type_t type)
792 {
793 	zprop_list_t *pl = cbp->cb_proplist;
794 	int i;
795 	char *title;
796 	size_t len;
797 
798 	cbp->cb_first = B_FALSE;
799 	if (cbp->cb_scripted)
800 		return;
801 
802 	/*
803 	 * Start with the length of the column headers.
804 	 */
805 	cbp->cb_colwidths[GET_COL_NAME] = strlen(dgettext(TEXT_DOMAIN, "NAME"));
806 	cbp->cb_colwidths[GET_COL_PROPERTY] = strlen(dgettext(TEXT_DOMAIN,
807 	    "PROPERTY"));
808 	cbp->cb_colwidths[GET_COL_VALUE] = strlen(dgettext(TEXT_DOMAIN,
809 	    "VALUE"));
810 	cbp->cb_colwidths[GET_COL_SOURCE] = strlen(dgettext(TEXT_DOMAIN,
811 	    "SOURCE"));
812 
813 	/* first property is always NAME */
814 	assert(cbp->cb_proplist->pl_prop ==
815 	    ((type == ZFS_TYPE_POOL) ?  ZPOOL_PROP_NAME : ZFS_PROP_NAME));
816 
817 	/*
818 	 * Go through and calculate the widths for each column.  For the
819 	 * 'source' column, we kludge it up by taking the worst-case scenario of
820 	 * inheriting from the longest name.  This is acceptable because in the
821 	 * majority of cases 'SOURCE' is the last column displayed, and we don't
822 	 * use the width anyway.  Note that the 'VALUE' column can be oversized,
823 	 * if the name of the property is much longer the any values we find.
824 	 */
825 	for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) {
826 		/*
827 		 * 'PROPERTY' column
828 		 */
829 		if (pl->pl_prop != ZPROP_INVAL) {
830 			const char *propname = (type == ZFS_TYPE_POOL) ?
831 			    zpool_prop_to_name(pl->pl_prop) :
832 			    zfs_prop_to_name(pl->pl_prop);
833 
834 			len = strlen(propname);
835 			if (len > cbp->cb_colwidths[GET_COL_PROPERTY])
836 				cbp->cb_colwidths[GET_COL_PROPERTY] = len;
837 		} else {
838 			len = strlen(pl->pl_user_prop);
839 			if (len > cbp->cb_colwidths[GET_COL_PROPERTY])
840 				cbp->cb_colwidths[GET_COL_PROPERTY] = len;
841 		}
842 
843 		/*
844 		 * 'VALUE' column.  The first property is always the 'name'
845 		 * property that was tacked on either by /sbin/zfs's
846 		 * zfs_do_get() or when calling zprop_expand_list(), so we
847 		 * ignore its width.  If the user specified the name property
848 		 * to display, then it will be later in the list in any case.
849 		 */
850 		if (pl != cbp->cb_proplist &&
851 		    pl->pl_width > cbp->cb_colwidths[GET_COL_VALUE])
852 			cbp->cb_colwidths[GET_COL_VALUE] = pl->pl_width;
853 
854 		/*
855 		 * 'NAME' and 'SOURCE' columns
856 		 */
857 		if (pl->pl_prop == (type == ZFS_TYPE_POOL ? ZPOOL_PROP_NAME :
858 		    ZFS_PROP_NAME) &&
859 		    pl->pl_width > cbp->cb_colwidths[GET_COL_NAME]) {
860 			cbp->cb_colwidths[GET_COL_NAME] = pl->pl_width;
861 			cbp->cb_colwidths[GET_COL_SOURCE] = pl->pl_width +
862 			    strlen(dgettext(TEXT_DOMAIN, "inherited from"));
863 		}
864 	}
865 
866 	/*
867 	 * Now go through and print the headers.
868 	 */
869 	for (i = 0; i < 4; i++) {
870 		switch (cbp->cb_columns[i]) {
871 		case GET_COL_NAME:
872 			title = dgettext(TEXT_DOMAIN, "NAME");
873 			break;
874 		case GET_COL_PROPERTY:
875 			title = dgettext(TEXT_DOMAIN, "PROPERTY");
876 			break;
877 		case GET_COL_VALUE:
878 			title = dgettext(TEXT_DOMAIN, "VALUE");
879 			break;
880 		case GET_COL_SOURCE:
881 			title = dgettext(TEXT_DOMAIN, "SOURCE");
882 			break;
883 		default:
884 			title = NULL;
885 		}
886 
887 		if (title != NULL) {
888 			if (i == 3 || cbp->cb_columns[i + 1] == 0)
889 				(void) printf("%s", title);
890 			else
891 				(void) printf("%-*s  ",
892 				    cbp->cb_colwidths[cbp->cb_columns[i]],
893 				    title);
894 		}
895 	}
896 	(void) printf("\n");
897 }
898 
899 /*
900  * Display a single line of output, according to the settings in the callback
901  * structure.
902  */
903 void
904 zprop_print_one_property(const char *name, zprop_get_cbdata_t *cbp,
905     const char *propname, const char *value, zprop_source_t sourcetype,
906     const char *source)
907 {
908 	int i;
909 	const char *str;
910 	char buf[128];
911 
912 	/*
913 	 * Ignore those source types that the user has chosen to ignore.
914 	 */
915 	if ((sourcetype & cbp->cb_sources) == 0)
916 		return;
917 
918 	if (cbp->cb_first)
919 		zprop_print_headers(cbp, cbp->cb_type);
920 
921 	for (i = 0; i < 4; i++) {
922 		switch (cbp->cb_columns[i]) {
923 		case GET_COL_NAME:
924 			str = name;
925 			break;
926 
927 		case GET_COL_PROPERTY:
928 			str = propname;
929 			break;
930 
931 		case GET_COL_VALUE:
932 			str = value;
933 			break;
934 
935 		case GET_COL_SOURCE:
936 			switch (sourcetype) {
937 			case ZPROP_SRC_NONE:
938 				str = "-";
939 				break;
940 
941 			case ZPROP_SRC_DEFAULT:
942 				str = "default";
943 				break;
944 
945 			case ZPROP_SRC_LOCAL:
946 				str = "local";
947 				break;
948 
949 			case ZPROP_SRC_TEMPORARY:
950 				str = "temporary";
951 				break;
952 
953 			case ZPROP_SRC_INHERITED:
954 				(void) snprintf(buf, sizeof (buf),
955 				    "inherited from %s", source);
956 				str = buf;
957 				break;
958 			}
959 			break;
960 
961 		default:
962 			continue;
963 		}
964 
965 		if (cbp->cb_columns[i + 1] == 0)
966 			(void) printf("%s", str);
967 		else if (cbp->cb_scripted)
968 			(void) printf("%s\t", str);
969 		else
970 			(void) printf("%-*s  ",
971 			    cbp->cb_colwidths[cbp->cb_columns[i]],
972 			    str);
973 
974 	}
975 
976 	(void) printf("\n");
977 }
978 
979 /*
980  * Given a numeric suffix, convert the value into a number of bits that the
981  * resulting value must be shifted.
982  */
983 static int
984 str2shift(libzfs_handle_t *hdl, const char *buf)
985 {
986 	const char *ends = "BKMGTPEZ";
987 	int i;
988 
989 	if (buf[0] == '\0')
990 		return (0);
991 	for (i = 0; i < strlen(ends); i++) {
992 		if (toupper(buf[0]) == ends[i])
993 			break;
994 	}
995 	if (i == strlen(ends)) {
996 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
997 		    "invalid numeric suffix '%s'"), buf);
998 		return (-1);
999 	}
1000 
1001 	/*
1002 	 * We want to allow trailing 'b' characters for 'GB' or 'Mb'.  But don't
1003 	 * allow 'BB' - that's just weird.
1004 	 */
1005 	if (buf[1] == '\0' || (toupper(buf[1]) == 'B' && buf[2] == '\0' &&
1006 	    toupper(buf[0]) != 'B'))
1007 		return (10*i);
1008 
1009 	zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1010 	    "invalid numeric suffix '%s'"), buf);
1011 	return (-1);
1012 }
1013 
1014 /*
1015  * Convert a string of the form '100G' into a real number.  Used when setting
1016  * properties or creating a volume.  'buf' is used to place an extended error
1017  * message for the caller to use.
1018  */
1019 int
1020 zfs_nicestrtonum(libzfs_handle_t *hdl, const char *value, uint64_t *num)
1021 {
1022 	char *end;
1023 	int shift;
1024 
1025 	*num = 0;
1026 
1027 	/* Check to see if this looks like a number.  */
1028 	if ((value[0] < '0' || value[0] > '9') && value[0] != '.') {
1029 		if (hdl)
1030 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1031 			    "bad numeric value '%s'"), value);
1032 		return (-1);
1033 	}
1034 
1035 	/* Rely on stroull() to process the numeric portion.  */
1036 	errno = 0;
1037 	*num = strtoull(value, &end, 10);
1038 
1039 	/*
1040 	 * Check for ERANGE, which indicates that the value is too large to fit
1041 	 * in a 64-bit value.
1042 	 */
1043 	if (errno == ERANGE) {
1044 		if (hdl)
1045 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1046 			    "numeric value is too large"));
1047 		return (-1);
1048 	}
1049 
1050 	/*
1051 	 * If we have a decimal value, then do the computation with floating
1052 	 * point arithmetic.  Otherwise, use standard arithmetic.
1053 	 */
1054 	if (*end == '.') {
1055 		double fval = strtod(value, &end);
1056 
1057 		if ((shift = str2shift(hdl, end)) == -1)
1058 			return (-1);
1059 
1060 		fval *= pow(2, shift);
1061 
1062 		if (fval > UINT64_MAX) {
1063 			if (hdl)
1064 				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1065 				    "numeric value is too large"));
1066 			return (-1);
1067 		}
1068 
1069 		*num = (uint64_t)fval;
1070 	} else {
1071 		if ((shift = str2shift(hdl, end)) == -1)
1072 			return (-1);
1073 
1074 		/* Check for overflow */
1075 		if (shift >= 64 || (*num << shift) >> shift != *num) {
1076 			if (hdl)
1077 				zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1078 				    "numeric value is too large"));
1079 			return (-1);
1080 		}
1081 
1082 		*num <<= shift;
1083 	}
1084 
1085 	return (0);
1086 }
1087 
1088 /*
1089  * Given a propname=value nvpair to set, parse any numeric properties
1090  * (index, boolean, etc) if they are specified as strings and add the
1091  * resulting nvpair to the returned nvlist.
1092  *
1093  * At the DSL layer, all properties are either 64-bit numbers or strings.
1094  * We want the user to be able to ignore this fact and specify properties
1095  * as native values (numbers, for example) or as strings (to simplify
1096  * command line utilities).  This also handles converting index types
1097  * (compression, checksum, etc) from strings to their on-disk index.
1098  */
1099 int
1100 zprop_parse_value(libzfs_handle_t *hdl, nvpair_t *elem, int prop,
1101     zfs_type_t type, nvlist_t *ret, char **svalp, uint64_t *ivalp,
1102     const char *errbuf)
1103 {
1104 	data_type_t datatype = nvpair_type(elem);
1105 	zprop_type_t proptype;
1106 	const char *propname;
1107 	char *value;
1108 	boolean_t isnone = B_FALSE;
1109 
1110 	if (type == ZFS_TYPE_POOL) {
1111 		proptype = zpool_prop_get_type(prop);
1112 		propname = zpool_prop_to_name(prop);
1113 	} else {
1114 		proptype = zfs_prop_get_type(prop);
1115 		propname = zfs_prop_to_name(prop);
1116 	}
1117 
1118 	/*
1119 	 * Convert any properties to the internal DSL value types.
1120 	 */
1121 	*svalp = NULL;
1122 	*ivalp = 0;
1123 
1124 	switch (proptype) {
1125 	case PROP_TYPE_STRING:
1126 		if (datatype != DATA_TYPE_STRING) {
1127 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1128 			    "'%s' must be a string"), nvpair_name(elem));
1129 			goto error;
1130 		}
1131 		(void) nvpair_value_string(elem, svalp);
1132 		if (strlen(*svalp) >= ZFS_MAXPROPLEN) {
1133 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1134 			    "'%s' is too long"), nvpair_name(elem));
1135 			goto error;
1136 		}
1137 		break;
1138 
1139 	case PROP_TYPE_NUMBER:
1140 		if (datatype == DATA_TYPE_STRING) {
1141 			(void) nvpair_value_string(elem, &value);
1142 			if (strcmp(value, "none") == 0) {
1143 				isnone = B_TRUE;
1144 			} else if (zfs_nicestrtonum(hdl, value, ivalp)
1145 			    != 0) {
1146 				goto error;
1147 			}
1148 		} else if (datatype == DATA_TYPE_UINT64) {
1149 			(void) nvpair_value_uint64(elem, ivalp);
1150 		} else {
1151 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1152 			    "'%s' must be a number"), nvpair_name(elem));
1153 			goto error;
1154 		}
1155 
1156 		/*
1157 		 * Quota special: force 'none' and don't allow 0.
1158 		 */
1159 		if ((type & ZFS_TYPE_DATASET) && *ivalp == 0 && !isnone &&
1160 		    (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_REFQUOTA)) {
1161 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1162 			    "use 'none' to disable quota/refquota"));
1163 			goto error;
1164 		}
1165 		break;
1166 
1167 	case PROP_TYPE_INDEX:
1168 		if (datatype != DATA_TYPE_STRING) {
1169 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1170 			    "'%s' must be a string"), nvpair_name(elem));
1171 			goto error;
1172 		}
1173 
1174 		(void) nvpair_value_string(elem, &value);
1175 
1176 		if (zprop_string_to_index(prop, value, ivalp, type) != 0) {
1177 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1178 			    "'%s' must be one of '%s'"), propname,
1179 			    zprop_values(prop, type));
1180 			goto error;
1181 		}
1182 		break;
1183 
1184 	default:
1185 		abort();
1186 	}
1187 
1188 	/*
1189 	 * Add the result to our return set of properties.
1190 	 */
1191 	if (*svalp != NULL) {
1192 		if (nvlist_add_string(ret, propname, *svalp) != 0) {
1193 			(void) no_memory(hdl);
1194 			return (-1);
1195 		}
1196 	} else {
1197 		if (nvlist_add_uint64(ret, propname, *ivalp) != 0) {
1198 			(void) no_memory(hdl);
1199 			return (-1);
1200 		}
1201 	}
1202 
1203 	return (0);
1204 error:
1205 	(void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1206 	return (-1);
1207 }
1208 
1209 static int
1210 addlist(libzfs_handle_t *hdl, char *propname, zprop_list_t **listp,
1211     zfs_type_t type)
1212 {
1213 	int prop;
1214 	zprop_list_t *entry;
1215 
1216 	prop = zprop_name_to_prop(propname, type);
1217 
1218 	if (prop != ZPROP_INVAL && !zprop_valid_for_type(prop, type))
1219 		prop = ZPROP_INVAL;
1220 
1221 	/*
1222 	 * When no property table entry can be found, return failure if
1223 	 * this is a pool property or if this isn't a user-defined
1224 	 * dataset property,
1225 	 */
1226 	if (prop == ZPROP_INVAL && (type == ZFS_TYPE_POOL ||
1227 	    (!zfs_prop_user(propname) && !zfs_prop_userquota(propname)))) {
1228 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1229 		    "invalid property '%s'"), propname);
1230 		return (zfs_error(hdl, EZFS_BADPROP,
1231 		    dgettext(TEXT_DOMAIN, "bad property list")));
1232 	}
1233 
1234 	if ((entry = zfs_alloc(hdl, sizeof (zprop_list_t))) == NULL)
1235 		return (-1);
1236 
1237 	entry->pl_prop = prop;
1238 	if (prop == ZPROP_INVAL) {
1239 		if ((entry->pl_user_prop = zfs_strdup(hdl, propname)) == NULL) {
1240 			free(entry);
1241 			return (-1);
1242 		}
1243 		entry->pl_width = strlen(propname);
1244 	} else {
1245 		entry->pl_width = zprop_width(prop, &entry->pl_fixed,
1246 		    type);
1247 	}
1248 
1249 	*listp = entry;
1250 
1251 	return (0);
1252 }
1253 
1254 /*
1255  * Given a comma-separated list of properties, construct a property list
1256  * containing both user-defined and native properties.  This function will
1257  * return a NULL list if 'all' is specified, which can later be expanded
1258  * by zprop_expand_list().
1259  */
1260 int
1261 zprop_get_list(libzfs_handle_t *hdl, char *props, zprop_list_t **listp,
1262     zfs_type_t type)
1263 {
1264 	*listp = NULL;
1265 
1266 	/*
1267 	 * If 'all' is specified, return a NULL list.
1268 	 */
1269 	if (strcmp(props, "all") == 0)
1270 		return (0);
1271 
1272 	/*
1273 	 * If no props were specified, return an error.
1274 	 */
1275 	if (props[0] == '\0') {
1276 		zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1277 		    "no properties specified"));
1278 		return (zfs_error(hdl, EZFS_BADPROP, dgettext(TEXT_DOMAIN,
1279 		    "bad property list")));
1280 	}
1281 
1282 	/*
1283 	 * It would be nice to use getsubopt() here, but the inclusion of column
1284 	 * aliases makes this more effort than it's worth.
1285 	 */
1286 	while (*props != '\0') {
1287 		size_t len;
1288 		char *p;
1289 		char c;
1290 
1291 		if ((p = strchr(props, ',')) == NULL) {
1292 			len = strlen(props);
1293 			p = props + len;
1294 		} else {
1295 			len = p - props;
1296 		}
1297 
1298 		/*
1299 		 * Check for empty options.
1300 		 */
1301 		if (len == 0) {
1302 			zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1303 			    "empty property name"));
1304 			return (zfs_error(hdl, EZFS_BADPROP,
1305 			    dgettext(TEXT_DOMAIN, "bad property list")));
1306 		}
1307 
1308 		/*
1309 		 * Check all regular property names.
1310 		 */
1311 		c = props[len];
1312 		props[len] = '\0';
1313 
1314 		if (strcmp(props, "space") == 0) {
1315 			static char *spaceprops[] = {
1316 				"name", "avail", "used", "usedbysnapshots",
1317 				"usedbydataset", "usedbyrefreservation",
1318 				"usedbychildren", NULL
1319 			};
1320 			int i;
1321 
1322 			for (i = 0; spaceprops[i]; i++) {
1323 				if (addlist(hdl, spaceprops[i], listp, type))
1324 					return (-1);
1325 				listp = &(*listp)->pl_next;
1326 			}
1327 		} else {
1328 			if (addlist(hdl, props, listp, type))
1329 				return (-1);
1330 			listp = &(*listp)->pl_next;
1331 		}
1332 
1333 		props = p;
1334 		if (c == ',')
1335 			props++;
1336 	}
1337 
1338 	return (0);
1339 }
1340 
1341 void
1342 zprop_free_list(zprop_list_t *pl)
1343 {
1344 	zprop_list_t *next;
1345 
1346 	while (pl != NULL) {
1347 		next = pl->pl_next;
1348 		free(pl->pl_user_prop);
1349 		free(pl);
1350 		pl = next;
1351 	}
1352 }
1353 
1354 typedef struct expand_data {
1355 	zprop_list_t	**last;
1356 	libzfs_handle_t	*hdl;
1357 	zfs_type_t type;
1358 } expand_data_t;
1359 
1360 int
1361 zprop_expand_list_cb(int prop, void *cb)
1362 {
1363 	zprop_list_t *entry;
1364 	expand_data_t *edp = cb;
1365 
1366 	if ((entry = zfs_alloc(edp->hdl, sizeof (zprop_list_t))) == NULL)
1367 		return (ZPROP_INVAL);
1368 
1369 	entry->pl_prop = prop;
1370 	entry->pl_width = zprop_width(prop, &entry->pl_fixed, edp->type);
1371 	entry->pl_all = B_TRUE;
1372 
1373 	*(edp->last) = entry;
1374 	edp->last = &entry->pl_next;
1375 
1376 	return (ZPROP_CONT);
1377 }
1378 
1379 int
1380 zprop_expand_list(libzfs_handle_t *hdl, zprop_list_t **plp, zfs_type_t type)
1381 {
1382 	zprop_list_t *entry;
1383 	zprop_list_t **last;
1384 	expand_data_t exp;
1385 
1386 	if (*plp == NULL) {
1387 		/*
1388 		 * If this is the very first time we've been called for an 'all'
1389 		 * specification, expand the list to include all native
1390 		 * properties.
1391 		 */
1392 		last = plp;
1393 
1394 		exp.last = last;
1395 		exp.hdl = hdl;
1396 		exp.type = type;
1397 
1398 		if (zprop_iter_common(zprop_expand_list_cb, &exp, B_FALSE,
1399 		    B_FALSE, type) == ZPROP_INVAL)
1400 			return (-1);
1401 
1402 		/*
1403 		 * Add 'name' to the beginning of the list, which is handled
1404 		 * specially.
1405 		 */
1406 		if ((entry = zfs_alloc(hdl, sizeof (zprop_list_t))) == NULL)
1407 			return (-1);
1408 
1409 		entry->pl_prop = (type == ZFS_TYPE_POOL) ?  ZPOOL_PROP_NAME :
1410 		    ZFS_PROP_NAME;
1411 		entry->pl_width = zprop_width(entry->pl_prop,
1412 		    &entry->pl_fixed, type);
1413 		entry->pl_all = B_TRUE;
1414 		entry->pl_next = *plp;
1415 		*plp = entry;
1416 	}
1417 	return (0);
1418 }
1419 
1420 int
1421 zprop_iter(zprop_func func, void *cb, boolean_t show_all, boolean_t ordered,
1422     zfs_type_t type)
1423 {
1424 	return (zprop_iter_common(func, cb, show_all, ordered, type));
1425 }
1426