zfs_main.c revision 11461:5113530c9d30 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#include <assert.h>
28#include <ctype.h>
29#include <errno.h>
30#include <libgen.h>
31#include <libintl.h>
32#include <libuutil.h>
33#include <libnvpair.h>
34#include <locale.h>
35#include <stddef.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <strings.h>
39#include <unistd.h>
40#include <fcntl.h>
41#include <zone.h>
42#include <grp.h>
43#include <pwd.h>
44#include <sys/mkdev.h>
45#include <sys/mntent.h>
46#include <sys/mnttab.h>
47#include <sys/mount.h>
48#include <sys/stat.h>
49#include <sys/fs/zfs.h>
50
51#include <libzfs.h>
52#include <libuutil.h>
53
54#include "zfs_iter.h"
55#include "zfs_util.h"
56
57libzfs_handle_t *g_zfs;
58
59static FILE *mnttab_file;
60static char history_str[HIS_MAX_RECORD_LEN];
61const char *pypath = "/usr/lib/zfs/pyzfs.py";
62
63static int zfs_do_clone(int argc, char **argv);
64static int zfs_do_create(int argc, char **argv);
65static int zfs_do_destroy(int argc, char **argv);
66static int zfs_do_get(int argc, char **argv);
67static int zfs_do_inherit(int argc, char **argv);
68static int zfs_do_list(int argc, char **argv);
69static int zfs_do_mount(int argc, char **argv);
70static int zfs_do_rename(int argc, char **argv);
71static int zfs_do_rollback(int argc, char **argv);
72static int zfs_do_set(int argc, char **argv);
73static int zfs_do_upgrade(int argc, char **argv);
74static int zfs_do_snapshot(int argc, char **argv);
75static int zfs_do_unmount(int argc, char **argv);
76static int zfs_do_share(int argc, char **argv);
77static int zfs_do_unshare(int argc, char **argv);
78static int zfs_do_send(int argc, char **argv);
79static int zfs_do_receive(int argc, char **argv);
80static int zfs_do_promote(int argc, char **argv);
81static int zfs_do_userspace(int argc, char **argv);
82static int zfs_do_python(int argc, char **argv);
83static int zfs_do_hold(int argc, char **argv);
84static int zfs_do_release(int argc, char **argv);
85
86/*
87 * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
88 */
89
90#ifdef DEBUG
91const char *
92_umem_debug_init(void)
93{
94	return ("default,verbose"); /* $UMEM_DEBUG setting */
95}
96
97const char *
98_umem_logging_init(void)
99{
100	return ("fail,contents"); /* $UMEM_LOGGING setting */
101}
102#endif
103
104typedef enum {
105	HELP_CLONE,
106	HELP_CREATE,
107	HELP_DESTROY,
108	HELP_GET,
109	HELP_INHERIT,
110	HELP_UPGRADE,
111	HELP_LIST,
112	HELP_MOUNT,
113	HELP_PROMOTE,
114	HELP_RECEIVE,
115	HELP_RENAME,
116	HELP_ROLLBACK,
117	HELP_SEND,
118	HELP_SET,
119	HELP_SHARE,
120	HELP_SNAPSHOT,
121	HELP_UNMOUNT,
122	HELP_UNSHARE,
123	HELP_ALLOW,
124	HELP_UNALLOW,
125	HELP_USERSPACE,
126	HELP_GROUPSPACE,
127	HELP_HOLD,
128	HELP_HOLDS,
129	HELP_RELEASE
130} zfs_help_t;
131
132typedef struct zfs_command {
133	const char	*name;
134	int		(*func)(int argc, char **argv);
135	zfs_help_t	usage;
136} zfs_command_t;
137
138/*
139 * Master command table.  Each ZFS command has a name, associated function, and
140 * usage message.  The usage messages need to be internationalized, so we have
141 * to have a function to return the usage message based on a command index.
142 *
143 * These commands are organized according to how they are displayed in the usage
144 * message.  An empty command (one with a NULL name) indicates an empty line in
145 * the generic usage message.
146 */
147static zfs_command_t command_table[] = {
148	{ "create",	zfs_do_create,		HELP_CREATE		},
149	{ "destroy",	zfs_do_destroy,		HELP_DESTROY		},
150	{ NULL },
151	{ "snapshot",	zfs_do_snapshot,	HELP_SNAPSHOT		},
152	{ "rollback",	zfs_do_rollback,	HELP_ROLLBACK		},
153	{ "clone",	zfs_do_clone,		HELP_CLONE		},
154	{ "promote",	zfs_do_promote,		HELP_PROMOTE		},
155	{ "rename",	zfs_do_rename,		HELP_RENAME		},
156	{ NULL },
157	{ "list",	zfs_do_list,		HELP_LIST		},
158	{ NULL },
159	{ "set",	zfs_do_set,		HELP_SET		},
160	{ "get",	zfs_do_get,		HELP_GET		},
161	{ "inherit",	zfs_do_inherit,		HELP_INHERIT		},
162	{ "upgrade",	zfs_do_upgrade,		HELP_UPGRADE		},
163	{ "userspace",	zfs_do_userspace,	HELP_USERSPACE		},
164	{ "groupspace",	zfs_do_userspace,	HELP_GROUPSPACE		},
165	{ NULL },
166	{ "mount",	zfs_do_mount,		HELP_MOUNT		},
167	{ "unmount",	zfs_do_unmount,		HELP_UNMOUNT		},
168	{ "share",	zfs_do_share,		HELP_SHARE		},
169	{ "unshare",	zfs_do_unshare,		HELP_UNSHARE		},
170	{ NULL },
171	{ "send",	zfs_do_send,		HELP_SEND		},
172	{ "receive",	zfs_do_receive,		HELP_RECEIVE		},
173	{ NULL },
174	{ "allow",	zfs_do_python,		HELP_ALLOW		},
175	{ NULL },
176	{ "unallow",	zfs_do_python,		HELP_UNALLOW		},
177	{ NULL },
178	{ "hold",	zfs_do_hold,		HELP_HOLD		},
179	{ "holds",	zfs_do_python,		HELP_HOLDS		},
180	{ "release",	zfs_do_release,		HELP_RELEASE		},
181};
182
183#define	NCOMMAND	(sizeof (command_table) / sizeof (command_table[0]))
184
185zfs_command_t *current_command;
186
187static const char *
188get_usage(zfs_help_t idx)
189{
190	switch (idx) {
191	case HELP_CLONE:
192		return (gettext("\tclone [-p] [-o property=value] ... "
193		    "<snapshot> <filesystem|volume>\n"));
194	case HELP_CREATE:
195		return (gettext("\tcreate [-p] [-o property=value] ... "
196		    "<filesystem>\n"
197		    "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
198		    "-V <size> <volume>\n"));
199	case HELP_DESTROY:
200		return (gettext("\tdestroy [-rRf] <filesystem|volume>\n"
201		    "\tdestroy [-rRd] <snapshot>\n"));
202	case HELP_GET:
203		return (gettext("\tget [-rHp] [-d max] "
204		    "[-o \"all\" | field[,...]] [-s source[,...]]\n"
205		    "\t    <\"all\" | property[,...]> "
206		    "[filesystem|volume|snapshot] ...\n"));
207	case HELP_INHERIT:
208		return (gettext("\tinherit [-rS] <property> "
209		    "<filesystem|volume|snapshot> ...\n"));
210	case HELP_UPGRADE:
211		return (gettext("\tupgrade [-v]\n"
212		    "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
213	case HELP_LIST:
214		return (gettext("\tlist [-rH][-d max] "
215		    "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
216		    "\t    [-S property] ... "
217		    "[filesystem|volume|snapshot] ...\n"));
218	case HELP_MOUNT:
219		return (gettext("\tmount\n"
220		    "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
221	case HELP_PROMOTE:
222		return (gettext("\tpromote <clone-filesystem>\n"));
223	case HELP_RECEIVE:
224		return (gettext("\treceive [-vnF] <filesystem|volume|"
225		"snapshot>\n"
226		"\treceive [-vnF] -d <filesystem>\n"));
227	case HELP_RENAME:
228		return (gettext("\trename <filesystem|volume|snapshot> "
229		    "<filesystem|volume|snapshot>\n"
230		    "\trename -p <filesystem|volume> <filesystem|volume>\n"
231		    "\trename -r <snapshot> <snapshot>"));
232	case HELP_ROLLBACK:
233		return (gettext("\trollback [-rRf] <snapshot>\n"));
234	case HELP_SEND:
235		return (gettext("\tsend [-RDp] [-[iI] snapshot] <snapshot>\n"));
236	case HELP_SET:
237		return (gettext("\tset <property=value> "
238		    "<filesystem|volume|snapshot> ...\n"));
239	case HELP_SHARE:
240		return (gettext("\tshare <-a | filesystem>\n"));
241	case HELP_SNAPSHOT:
242		return (gettext("\tsnapshot [-r] [-o property=value] ... "
243		    "<filesystem@snapname|volume@snapname>\n"));
244	case HELP_UNMOUNT:
245		return (gettext("\tunmount [-f] "
246		    "<-a | filesystem|mountpoint>\n"));
247	case HELP_UNSHARE:
248		return (gettext("\tunshare "
249		    "<-a | filesystem|mountpoint>\n"));
250	case HELP_ALLOW:
251		return (gettext("\tallow <filesystem|volume>\n"
252		    "\tallow [-ldug] "
253		    "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
254		    "\t    <filesystem|volume>\n"
255		    "\tallow [-ld] -e <perm|@setname>[,...] "
256		    "<filesystem|volume>\n"
257		    "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
258		    "\tallow -s @setname <perm|@setname>[,...] "
259		    "<filesystem|volume>\n"));
260	case HELP_UNALLOW:
261		return (gettext("\tunallow [-rldug] "
262		    "<\"everyone\"|user|group>[,...]\n"
263		    "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
264		    "\tunallow [-rld] -e [<perm|@setname>[,...]] "
265		    "<filesystem|volume>\n"
266		    "\tunallow [-r] -c [<perm|@setname>[,...]] "
267		    "<filesystem|volume>\n"
268		    "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
269		    "<filesystem|volume>\n"));
270	case HELP_USERSPACE:
271		return (gettext("\tuserspace [-hniHp] [-o field[,...]] "
272		    "[-sS field] ... [-t type[,...]]\n"
273		    "\t    <filesystem|snapshot>\n"));
274	case HELP_GROUPSPACE:
275		return (gettext("\tgroupspace [-hniHpU] [-o field[,...]] "
276		    "[-sS field] ... [-t type[,...]]\n"
277		    "\t    <filesystem|snapshot>\n"));
278	case HELP_HOLD:
279		return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
280	case HELP_HOLDS:
281		return (gettext("\tholds [-r] <snapshot> ...\n"));
282	case HELP_RELEASE:
283		return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
284	}
285
286	abort();
287	/* NOTREACHED */
288}
289
290/*
291 * Utility function to guarantee malloc() success.
292 */
293void *
294safe_malloc(size_t size)
295{
296	void *data;
297
298	if ((data = calloc(1, size)) == NULL) {
299		(void) fprintf(stderr, "internal error: out of memory\n");
300		exit(1);
301	}
302
303	return (data);
304}
305
306/*
307 * Callback routine that will print out information for each of
308 * the properties.
309 */
310static int
311usage_prop_cb(int prop, void *cb)
312{
313	FILE *fp = cb;
314
315	(void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
316
317	if (zfs_prop_readonly(prop))
318		(void) fprintf(fp, " NO    ");
319	else
320		(void) fprintf(fp, "YES    ");
321
322	if (zfs_prop_inheritable(prop))
323		(void) fprintf(fp, "  YES   ");
324	else
325		(void) fprintf(fp, "   NO   ");
326
327	if (zfs_prop_values(prop) == NULL)
328		(void) fprintf(fp, "-\n");
329	else
330		(void) fprintf(fp, "%s\n", zfs_prop_values(prop));
331
332	return (ZPROP_CONT);
333}
334
335/*
336 * Display usage message.  If we're inside a command, display only the usage for
337 * that command.  Otherwise, iterate over the entire command table and display
338 * a complete usage message.
339 */
340static void
341usage(boolean_t requested)
342{
343	int i;
344	boolean_t show_properties = B_FALSE;
345	FILE *fp = requested ? stdout : stderr;
346
347	if (current_command == NULL) {
348
349		(void) fprintf(fp, gettext("usage: zfs command args ...\n"));
350		(void) fprintf(fp,
351		    gettext("where 'command' is one of the following:\n\n"));
352
353		for (i = 0; i < NCOMMAND; i++) {
354			if (command_table[i].name == NULL)
355				(void) fprintf(fp, "\n");
356			else
357				(void) fprintf(fp, "%s",
358				    get_usage(command_table[i].usage));
359		}
360
361		(void) fprintf(fp, gettext("\nEach dataset is of the form: "
362		    "pool/[dataset/]*dataset[@name]\n"));
363	} else {
364		(void) fprintf(fp, gettext("usage:\n"));
365		(void) fprintf(fp, "%s", get_usage(current_command->usage));
366	}
367
368	if (current_command != NULL &&
369	    (strcmp(current_command->name, "set") == 0 ||
370	    strcmp(current_command->name, "get") == 0 ||
371	    strcmp(current_command->name, "inherit") == 0 ||
372	    strcmp(current_command->name, "list") == 0))
373		show_properties = B_TRUE;
374
375	if (show_properties) {
376		(void) fprintf(fp,
377		    gettext("\nThe following properties are supported:\n"));
378
379		(void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
380		    "PROPERTY", "EDIT", "INHERIT", "VALUES");
381
382		/* Iterate over all properties */
383		(void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
384		    ZFS_TYPE_DATASET);
385
386		(void) fprintf(fp, "\t%-15s ", "userused@...");
387		(void) fprintf(fp, " NO       NO   <size>\n");
388		(void) fprintf(fp, "\t%-15s ", "groupused@...");
389		(void) fprintf(fp, " NO       NO   <size>\n");
390		(void) fprintf(fp, "\t%-15s ", "userquota@...");
391		(void) fprintf(fp, "YES       NO   <size> | none\n");
392		(void) fprintf(fp, "\t%-15s ", "groupquota@...");
393		(void) fprintf(fp, "YES       NO   <size> | none\n");
394
395		(void) fprintf(fp, gettext("\nSizes are specified in bytes "
396		    "with standard units such as K, M, G, etc.\n"));
397		(void) fprintf(fp, gettext("\nUser-defined properties can "
398		    "be specified by using a name containing a colon (:).\n"));
399		(void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
400		    "properties must be appended with\n"
401		    "a user or group specifier of one of these forms:\n"
402		    "    POSIX name      (eg: \"matt\")\n"
403		    "    POSIX id        (eg: \"126829\")\n"
404		    "    SMB name@domain (eg: \"matt@sun\")\n"
405		    "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
406	} else {
407		(void) fprintf(fp,
408		    gettext("\nFor the property list, run: %s\n"),
409		    "zfs set|get");
410		(void) fprintf(fp,
411		    gettext("\nFor the delegated permission list, run: %s\n"),
412		    "zfs allow|unallow");
413	}
414
415	/*
416	 * See comments at end of main().
417	 */
418	if (getenv("ZFS_ABORT") != NULL) {
419		(void) printf("dumping core by request\n");
420		abort();
421	}
422
423	exit(requested ? 0 : 2);
424}
425
426static int
427parseprop(nvlist_t *props)
428{
429	char *propname = optarg;
430	char *propval, *strval;
431
432	if ((propval = strchr(propname, '=')) == NULL) {
433		(void) fprintf(stderr, gettext("missing "
434		    "'=' for -o option\n"));
435		return (-1);
436	}
437	*propval = '\0';
438	propval++;
439	if (nvlist_lookup_string(props, propname, &strval) == 0) {
440		(void) fprintf(stderr, gettext("property '%s' "
441		    "specified multiple times\n"), propname);
442		return (-1);
443	}
444	if (nvlist_add_string(props, propname, propval) != 0) {
445		(void) fprintf(stderr, gettext("internal "
446		    "error: out of memory\n"));
447		return (-1);
448	}
449	return (0);
450}
451
452static int
453parse_depth(char *opt, int *flags)
454{
455	char *tmp;
456	int depth;
457
458	depth = (int)strtol(opt, &tmp, 0);
459	if (*tmp) {
460		(void) fprintf(stderr,
461		    gettext("%s is not an integer\n"), optarg);
462		usage(B_FALSE);
463	}
464	if (depth < 0) {
465		(void) fprintf(stderr,
466		    gettext("Depth can not be negative.\n"));
467		usage(B_FALSE);
468	}
469	*flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
470	return (depth);
471}
472
473/*
474 * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
475 *
476 * Given an existing dataset, create a writable copy whose initial contents
477 * are the same as the source.  The newly created dataset maintains a
478 * dependency on the original; the original cannot be destroyed so long as
479 * the clone exists.
480 *
481 * The '-p' flag creates all the non-existing ancestors of the target first.
482 */
483static int
484zfs_do_clone(int argc, char **argv)
485{
486	zfs_handle_t *zhp = NULL;
487	boolean_t parents = B_FALSE;
488	nvlist_t *props;
489	int ret;
490	int c;
491
492	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
493		(void) fprintf(stderr, gettext("internal error: "
494		    "out of memory\n"));
495		return (1);
496	}
497
498	/* check options */
499	while ((c = getopt(argc, argv, "o:p")) != -1) {
500		switch (c) {
501		case 'o':
502			if (parseprop(props))
503				return (1);
504			break;
505		case 'p':
506			parents = B_TRUE;
507			break;
508		case '?':
509			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
510			    optopt);
511			goto usage;
512		}
513	}
514
515	argc -= optind;
516	argv += optind;
517
518	/* check number of arguments */
519	if (argc < 1) {
520		(void) fprintf(stderr, gettext("missing source dataset "
521		    "argument\n"));
522		goto usage;
523	}
524	if (argc < 2) {
525		(void) fprintf(stderr, gettext("missing target dataset "
526		    "argument\n"));
527		goto usage;
528	}
529	if (argc > 2) {
530		(void) fprintf(stderr, gettext("too many arguments\n"));
531		goto usage;
532	}
533
534	/* open the source dataset */
535	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
536		return (1);
537
538	if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
539	    ZFS_TYPE_VOLUME)) {
540		/*
541		 * Now create the ancestors of the target dataset.  If the
542		 * target already exists and '-p' option was used we should not
543		 * complain.
544		 */
545		if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
546		    ZFS_TYPE_VOLUME))
547			return (0);
548		if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
549			return (1);
550	}
551
552	/* pass to libzfs */
553	ret = zfs_clone(zhp, argv[1], props);
554
555	/* create the mountpoint if necessary */
556	if (ret == 0) {
557		zfs_handle_t *clone;
558
559		clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
560		if (clone != NULL) {
561			if ((ret = zfs_mount(clone, NULL, 0)) == 0)
562				ret = zfs_share(clone);
563			zfs_close(clone);
564		}
565	}
566
567	zfs_close(zhp);
568	nvlist_free(props);
569
570	return (!!ret);
571
572usage:
573	if (zhp)
574		zfs_close(zhp);
575	nvlist_free(props);
576	usage(B_FALSE);
577	return (-1);
578}
579
580/*
581 * zfs create [-p] [-o prop=value] ... fs
582 * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
583 *
584 * Create a new dataset.  This command can be used to create filesystems
585 * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
586 * For volumes, the user must specify a size to be used.
587 *
588 * The '-s' flag applies only to volumes, and indicates that we should not try
589 * to set the reservation for this volume.  By default we set a reservation
590 * equal to the size for any volume.  For pools with SPA_VERSION >=
591 * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
592 *
593 * The '-p' flag creates all the non-existing ancestors of the target first.
594 */
595static int
596zfs_do_create(int argc, char **argv)
597{
598	zfs_type_t type = ZFS_TYPE_FILESYSTEM;
599	zfs_handle_t *zhp = NULL;
600	uint64_t volsize;
601	int c;
602	boolean_t noreserve = B_FALSE;
603	boolean_t bflag = B_FALSE;
604	boolean_t parents = B_FALSE;
605	int ret = 1;
606	nvlist_t *props;
607	uint64_t intval;
608	int canmount;
609
610	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
611		(void) fprintf(stderr, gettext("internal error: "
612		    "out of memory\n"));
613		return (1);
614	}
615
616	/* check options */
617	while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
618		switch (c) {
619		case 'V':
620			type = ZFS_TYPE_VOLUME;
621			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
622				(void) fprintf(stderr, gettext("bad volume "
623				    "size '%s': %s\n"), optarg,
624				    libzfs_error_description(g_zfs));
625				goto error;
626			}
627
628			if (nvlist_add_uint64(props,
629			    zfs_prop_to_name(ZFS_PROP_VOLSIZE),
630			    intval) != 0) {
631				(void) fprintf(stderr, gettext("internal "
632				    "error: out of memory\n"));
633				goto error;
634			}
635			volsize = intval;
636			break;
637		case 'p':
638			parents = B_TRUE;
639			break;
640		case 'b':
641			bflag = B_TRUE;
642			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
643				(void) fprintf(stderr, gettext("bad volume "
644				    "block size '%s': %s\n"), optarg,
645				    libzfs_error_description(g_zfs));
646				goto error;
647			}
648
649			if (nvlist_add_uint64(props,
650			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
651			    intval) != 0) {
652				(void) fprintf(stderr, gettext("internal "
653				    "error: out of memory\n"));
654				goto error;
655			}
656			break;
657		case 'o':
658			if (parseprop(props))
659				goto error;
660			break;
661		case 's':
662			noreserve = B_TRUE;
663			break;
664		case ':':
665			(void) fprintf(stderr, gettext("missing size "
666			    "argument\n"));
667			goto badusage;
668			break;
669		case '?':
670			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
671			    optopt);
672			goto badusage;
673		}
674	}
675
676	if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
677		(void) fprintf(stderr, gettext("'-s' and '-b' can only be "
678		    "used when creating a volume\n"));
679		goto badusage;
680	}
681
682	argc -= optind;
683	argv += optind;
684
685	/* check number of arguments */
686	if (argc == 0) {
687		(void) fprintf(stderr, gettext("missing %s argument\n"),
688		    zfs_type_to_name(type));
689		goto badusage;
690	}
691	if (argc > 1) {
692		(void) fprintf(stderr, gettext("too many arguments\n"));
693		goto badusage;
694	}
695
696	if (type == ZFS_TYPE_VOLUME && !noreserve) {
697		zpool_handle_t *zpool_handle;
698		uint64_t spa_version;
699		char *p;
700		zfs_prop_t resv_prop;
701		char *strval;
702
703		if (p = strchr(argv[0], '/'))
704			*p = '\0';
705		zpool_handle = zpool_open(g_zfs, argv[0]);
706		if (p != NULL)
707			*p = '/';
708		if (zpool_handle == NULL)
709			goto error;
710		spa_version = zpool_get_prop_int(zpool_handle,
711		    ZPOOL_PROP_VERSION, NULL);
712		zpool_close(zpool_handle);
713		if (spa_version >= SPA_VERSION_REFRESERVATION)
714			resv_prop = ZFS_PROP_REFRESERVATION;
715		else
716			resv_prop = ZFS_PROP_RESERVATION;
717		volsize = zvol_volsize_to_reservation(volsize, props);
718
719		if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
720		    &strval) != 0) {
721			if (nvlist_add_uint64(props,
722			    zfs_prop_to_name(resv_prop), volsize) != 0) {
723				(void) fprintf(stderr, gettext("internal "
724				    "error: out of memory\n"));
725				nvlist_free(props);
726				return (1);
727			}
728		}
729	}
730
731	if (parents && zfs_name_valid(argv[0], type)) {
732		/*
733		 * Now create the ancestors of target dataset.  If the target
734		 * already exists and '-p' option was used we should not
735		 * complain.
736		 */
737		if (zfs_dataset_exists(g_zfs, argv[0], type)) {
738			ret = 0;
739			goto error;
740		}
741		if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
742			goto error;
743	}
744
745	/* pass to libzfs */
746	if (zfs_create(g_zfs, argv[0], type, props) != 0)
747		goto error;
748
749	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
750		goto error;
751	/*
752	 * if the user doesn't want the dataset automatically mounted,
753	 * then skip the mount/share step
754	 */
755
756	canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
757
758	/*
759	 * Mount and/or share the new filesystem as appropriate.  We provide a
760	 * verbose error message to let the user know that their filesystem was
761	 * in fact created, even if we failed to mount or share it.
762	 */
763	ret = 0;
764	if (canmount == ZFS_CANMOUNT_ON) {
765		if (zfs_mount(zhp, NULL, 0) != 0) {
766			(void) fprintf(stderr, gettext("filesystem "
767			    "successfully created, but not mounted\n"));
768			ret = 1;
769		} else if (zfs_share(zhp) != 0) {
770			(void) fprintf(stderr, gettext("filesystem "
771			    "successfully created, but not shared\n"));
772			ret = 1;
773		}
774	}
775
776error:
777	if (zhp)
778		zfs_close(zhp);
779	nvlist_free(props);
780	return (ret);
781badusage:
782	nvlist_free(props);
783	usage(B_FALSE);
784	return (2);
785}
786
787/*
788 * zfs destroy [-rRf] <fs, vol>
789 * zfs destroy [-rRd] <snap>
790 *
791 *	-r	Recursively destroy all children
792 *	-R	Recursively destroy all dependents, including clones
793 *	-f	Force unmounting of any dependents
794 *	-d	If we can't destroy now, mark for deferred destruction
795 *
796 * Destroys the given dataset.  By default, it will unmount any filesystems,
797 * and refuse to destroy a dataset that has any dependents.  A dependent can
798 * either be a child, or a clone of a child.
799 */
800typedef struct destroy_cbdata {
801	boolean_t	cb_first;
802	int		cb_force;
803	int		cb_recurse;
804	int		cb_error;
805	int		cb_needforce;
806	int		cb_doclones;
807	boolean_t	cb_closezhp;
808	zfs_handle_t	*cb_target;
809	char		*cb_snapname;
810	boolean_t	cb_defer_destroy;
811} destroy_cbdata_t;
812
813/*
814 * Check for any dependents based on the '-r' or '-R' flags.
815 */
816static int
817destroy_check_dependent(zfs_handle_t *zhp, void *data)
818{
819	destroy_cbdata_t *cbp = data;
820	const char *tname = zfs_get_name(cbp->cb_target);
821	const char *name = zfs_get_name(zhp);
822
823	if (strncmp(tname, name, strlen(tname)) == 0 &&
824	    (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
825		/*
826		 * This is a direct descendant, not a clone somewhere else in
827		 * the hierarchy.
828		 */
829		if (cbp->cb_recurse)
830			goto out;
831
832		if (cbp->cb_first) {
833			(void) fprintf(stderr, gettext("cannot destroy '%s': "
834			    "%s has children\n"),
835			    zfs_get_name(cbp->cb_target),
836			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
837			(void) fprintf(stderr, gettext("use '-r' to destroy "
838			    "the following datasets:\n"));
839			cbp->cb_first = B_FALSE;
840			cbp->cb_error = 1;
841		}
842
843		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
844	} else {
845		/*
846		 * This is a clone.  We only want to report this if the '-r'
847		 * wasn't specified, or the target is a snapshot.
848		 */
849		if (!cbp->cb_recurse &&
850		    zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
851			goto out;
852
853		if (cbp->cb_first) {
854			(void) fprintf(stderr, gettext("cannot destroy '%s': "
855			    "%s has dependent clones\n"),
856			    zfs_get_name(cbp->cb_target),
857			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
858			(void) fprintf(stderr, gettext("use '-R' to destroy "
859			    "the following datasets:\n"));
860			cbp->cb_first = B_FALSE;
861			cbp->cb_error = 1;
862		}
863
864		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
865	}
866
867out:
868	zfs_close(zhp);
869	return (0);
870}
871
872static int
873destroy_callback(zfs_handle_t *zhp, void *data)
874{
875	destroy_cbdata_t *cbp = data;
876
877	/*
878	 * Ignore pools (which we've already flagged as an error before getting
879	 * here).
880	 */
881	if (strchr(zfs_get_name(zhp), '/') == NULL &&
882	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
883		zfs_close(zhp);
884		return (0);
885	}
886
887	/*
888	 * Bail out on the first error.
889	 */
890	if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
891	    zfs_destroy(zhp, cbp->cb_defer_destroy) != 0) {
892		zfs_close(zhp);
893		return (-1);
894	}
895
896	zfs_close(zhp);
897	return (0);
898}
899
900static int
901destroy_snap_clones(zfs_handle_t *zhp, void *arg)
902{
903	destroy_cbdata_t *cbp = arg;
904	char thissnap[MAXPATHLEN];
905	zfs_handle_t *szhp;
906	boolean_t closezhp = cbp->cb_closezhp;
907	int rv;
908
909	(void) snprintf(thissnap, sizeof (thissnap),
910	    "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
911
912	libzfs_print_on_error(g_zfs, B_FALSE);
913	szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
914	libzfs_print_on_error(g_zfs, B_TRUE);
915	if (szhp) {
916		/*
917		 * Destroy any clones of this snapshot
918		 */
919		if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
920		    cbp) != 0) {
921			zfs_close(szhp);
922			if (closezhp)
923				zfs_close(zhp);
924			return (-1);
925		}
926		zfs_close(szhp);
927	}
928
929	cbp->cb_closezhp = B_TRUE;
930	rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
931	if (closezhp)
932		zfs_close(zhp);
933	return (rv);
934}
935
936static int
937zfs_do_destroy(int argc, char **argv)
938{
939	destroy_cbdata_t cb = { 0 };
940	int c;
941	zfs_handle_t *zhp;
942	char *cp;
943	zfs_type_t type = ZFS_TYPE_DATASET;
944
945	/* check options */
946	while ((c = getopt(argc, argv, "dfrR")) != -1) {
947		switch (c) {
948		case 'd':
949			cb.cb_defer_destroy = B_TRUE;
950			type = ZFS_TYPE_SNAPSHOT;
951			break;
952		case 'f':
953			cb.cb_force = 1;
954			break;
955		case 'r':
956			cb.cb_recurse = 1;
957			break;
958		case 'R':
959			cb.cb_recurse = 1;
960			cb.cb_doclones = 1;
961			break;
962		case '?':
963		default:
964			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
965			    optopt);
966			usage(B_FALSE);
967		}
968	}
969
970	argc -= optind;
971	argv += optind;
972
973	/* check number of arguments */
974	if (argc == 0) {
975		(void) fprintf(stderr, gettext("missing path argument\n"));
976		usage(B_FALSE);
977	}
978	if (argc > 1) {
979		(void) fprintf(stderr, gettext("too many arguments\n"));
980		usage(B_FALSE);
981	}
982
983	/*
984	 * If we are doing recursive destroy of a snapshot, then the
985	 * named snapshot may not exist.  Go straight to libzfs.
986	 */
987	if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
988		int ret;
989
990		*cp = '\0';
991		if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
992			return (1);
993		*cp = '@';
994		cp++;
995
996		if (cb.cb_doclones) {
997			boolean_t defer = cb.cb_defer_destroy;
998
999			/*
1000			 * Temporarily ignore the defer_destroy setting since
1001			 * it's not supported for clones.
1002			 */
1003			cb.cb_defer_destroy = B_FALSE;
1004			cb.cb_snapname = cp;
1005			if (destroy_snap_clones(zhp, &cb) != 0) {
1006				zfs_close(zhp);
1007				return (1);
1008			}
1009			cb.cb_defer_destroy = defer;
1010		}
1011
1012		ret = zfs_destroy_snaps(zhp, cp, cb.cb_defer_destroy);
1013		zfs_close(zhp);
1014		if (ret) {
1015			(void) fprintf(stderr,
1016			    gettext("no snapshots destroyed\n"));
1017		}
1018		return (ret != 0);
1019	}
1020
1021	/* Open the given dataset */
1022	if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1023		return (1);
1024
1025	cb.cb_target = zhp;
1026
1027	/*
1028	 * Perform an explicit check for pools before going any further.
1029	 */
1030	if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1031	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1032		(void) fprintf(stderr, gettext("cannot destroy '%s': "
1033		    "operation does not apply to pools\n"),
1034		    zfs_get_name(zhp));
1035		(void) fprintf(stderr, gettext("use 'zfs destroy -r "
1036		    "%s' to destroy all datasets in the pool\n"),
1037		    zfs_get_name(zhp));
1038		(void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1039		    "to destroy the pool itself\n"), zfs_get_name(zhp));
1040		zfs_close(zhp);
1041		return (1);
1042	}
1043
1044	/*
1045	 * Check for any dependents and/or clones.
1046	 */
1047	cb.cb_first = B_TRUE;
1048	if (!cb.cb_doclones && !cb.cb_defer_destroy &&
1049	    zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1050	    &cb) != 0) {
1051		zfs_close(zhp);
1052		return (1);
1053	}
1054
1055	if (cb.cb_error || (!cb.cb_defer_destroy &&
1056	    (zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0))) {
1057		zfs_close(zhp);
1058		return (1);
1059	}
1060
1061	/*
1062	 * Do the real thing.  The callback will close the handle regardless of
1063	 * whether it succeeds or not.
1064	 */
1065
1066	if (destroy_callback(zhp, &cb) != 0)
1067		return (1);
1068
1069	return (0);
1070}
1071
1072static boolean_t
1073is_recvd_column(zprop_get_cbdata_t *cbp)
1074{
1075	int i;
1076	zfs_get_column_t col;
1077
1078	for (i = 0; i < ZFS_GET_NCOLS &&
1079	    (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1080		if (col == GET_COL_RECVD)
1081			return (B_TRUE);
1082	return (B_FALSE);
1083}
1084
1085/*
1086 * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1087 *	< all | property[,property]... > < fs | snap | vol > ...
1088 *
1089 *	-r	recurse over any child datasets
1090 *	-H	scripted mode.  Headers are stripped, and fields are separated
1091 *		by tabs instead of spaces.
1092 *	-o	Set of fields to display.  One of "name,property,value,
1093 *		received,source". Default is "name,property,value,source".
1094 *		"all" is an alias for all five.
1095 *	-s	Set of sources to allow.  One of
1096 *		"local,default,inherited,received,temporary,none".  Default is
1097 *		all six.
1098 *	-p	Display values in parsable (literal) format.
1099 *
1100 *  Prints properties for the given datasets.  The user can control which
1101 *  columns to display as well as which property types to allow.
1102 */
1103
1104/*
1105 * Invoked to display the properties for a single dataset.
1106 */
1107static int
1108get_callback(zfs_handle_t *zhp, void *data)
1109{
1110	char buf[ZFS_MAXPROPLEN];
1111	char rbuf[ZFS_MAXPROPLEN];
1112	zprop_source_t sourcetype;
1113	char source[ZFS_MAXNAMELEN];
1114	zprop_get_cbdata_t *cbp = data;
1115	nvlist_t *user_props = zfs_get_user_props(zhp);
1116	zprop_list_t *pl = cbp->cb_proplist;
1117	nvlist_t *propval;
1118	char *strval;
1119	char *sourceval;
1120	boolean_t received = is_recvd_column(cbp);
1121
1122	for (; pl != NULL; pl = pl->pl_next) {
1123		char *recvdval = NULL;
1124		/*
1125		 * Skip the special fake placeholder.  This will also skip over
1126		 * the name property when 'all' is specified.
1127		 */
1128		if (pl->pl_prop == ZFS_PROP_NAME &&
1129		    pl == cbp->cb_proplist)
1130			continue;
1131
1132		if (pl->pl_prop != ZPROP_INVAL) {
1133			if (zfs_prop_get(zhp, pl->pl_prop, buf,
1134			    sizeof (buf), &sourcetype, source,
1135			    sizeof (source),
1136			    cbp->cb_literal) != 0) {
1137				if (pl->pl_all)
1138					continue;
1139				if (!zfs_prop_valid_for_type(pl->pl_prop,
1140				    ZFS_TYPE_DATASET)) {
1141					(void) fprintf(stderr,
1142					    gettext("No such property '%s'\n"),
1143					    zfs_prop_to_name(pl->pl_prop));
1144					continue;
1145				}
1146				sourcetype = ZPROP_SRC_NONE;
1147				(void) strlcpy(buf, "-", sizeof (buf));
1148			}
1149
1150			if (received && (zfs_prop_get_recvd(zhp,
1151			    zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1152			    cbp->cb_literal) == 0))
1153				recvdval = rbuf;
1154
1155			zprop_print_one_property(zfs_get_name(zhp), cbp,
1156			    zfs_prop_to_name(pl->pl_prop),
1157			    buf, sourcetype, source, recvdval);
1158		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1159			sourcetype = ZPROP_SRC_LOCAL;
1160
1161			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1162			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1163				sourcetype = ZPROP_SRC_NONE;
1164				(void) strlcpy(buf, "-", sizeof (buf));
1165			}
1166
1167			zprop_print_one_property(zfs_get_name(zhp), cbp,
1168			    pl->pl_user_prop, buf, sourcetype, source, NULL);
1169		} else {
1170			if (nvlist_lookup_nvlist(user_props,
1171			    pl->pl_user_prop, &propval) != 0) {
1172				if (pl->pl_all)
1173					continue;
1174				sourcetype = ZPROP_SRC_NONE;
1175				strval = "-";
1176			} else {
1177				verify(nvlist_lookup_string(propval,
1178				    ZPROP_VALUE, &strval) == 0);
1179				verify(nvlist_lookup_string(propval,
1180				    ZPROP_SOURCE, &sourceval) == 0);
1181
1182				if (strcmp(sourceval,
1183				    zfs_get_name(zhp)) == 0) {
1184					sourcetype = ZPROP_SRC_LOCAL;
1185				} else if (strcmp(sourceval,
1186				    ZPROP_SOURCE_VAL_RECVD) == 0) {
1187					sourcetype = ZPROP_SRC_RECEIVED;
1188				} else {
1189					sourcetype = ZPROP_SRC_INHERITED;
1190					(void) strlcpy(source,
1191					    sourceval, sizeof (source));
1192				}
1193			}
1194
1195			if (received && (zfs_prop_get_recvd(zhp,
1196			    pl->pl_user_prop, rbuf, sizeof (rbuf),
1197			    cbp->cb_literal) == 0))
1198				recvdval = rbuf;
1199
1200			zprop_print_one_property(zfs_get_name(zhp), cbp,
1201			    pl->pl_user_prop, strval, sourcetype,
1202			    source, recvdval);
1203		}
1204	}
1205
1206	return (0);
1207}
1208
1209static int
1210zfs_do_get(int argc, char **argv)
1211{
1212	zprop_get_cbdata_t cb = { 0 };
1213	int i, c, flags = 0;
1214	char *value, *fields;
1215	int ret;
1216	int limit = 0;
1217	zprop_list_t fake_name = { 0 };
1218
1219	/*
1220	 * Set up default columns and sources.
1221	 */
1222	cb.cb_sources = ZPROP_SRC_ALL;
1223	cb.cb_columns[0] = GET_COL_NAME;
1224	cb.cb_columns[1] = GET_COL_PROPERTY;
1225	cb.cb_columns[2] = GET_COL_VALUE;
1226	cb.cb_columns[3] = GET_COL_SOURCE;
1227	cb.cb_type = ZFS_TYPE_DATASET;
1228
1229	/* check options */
1230	while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
1231		switch (c) {
1232		case 'p':
1233			cb.cb_literal = B_TRUE;
1234			break;
1235		case 'd':
1236			limit = parse_depth(optarg, &flags);
1237			break;
1238		case 'r':
1239			flags |= ZFS_ITER_RECURSE;
1240			break;
1241		case 'H':
1242			cb.cb_scripted = B_TRUE;
1243			break;
1244		case ':':
1245			(void) fprintf(stderr, gettext("missing argument for "
1246			    "'%c' option\n"), optopt);
1247			usage(B_FALSE);
1248			break;
1249		case 'o':
1250			/*
1251			 * Process the set of columns to display.  We zero out
1252			 * the structure to give us a blank slate.
1253			 */
1254			bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1255			i = 0;
1256			while (*optarg != '\0') {
1257				static char *col_subopts[] =
1258				    { "name", "property", "value", "received",
1259				    "source", "all", NULL };
1260
1261				if (i == ZFS_GET_NCOLS) {
1262					(void) fprintf(stderr, gettext("too "
1263					    "many fields given to -o "
1264					    "option\n"));
1265					usage(B_FALSE);
1266				}
1267
1268				switch (getsubopt(&optarg, col_subopts,
1269				    &value)) {
1270				case 0:
1271					cb.cb_columns[i++] = GET_COL_NAME;
1272					break;
1273				case 1:
1274					cb.cb_columns[i++] = GET_COL_PROPERTY;
1275					break;
1276				case 2:
1277					cb.cb_columns[i++] = GET_COL_VALUE;
1278					break;
1279				case 3:
1280					cb.cb_columns[i++] = GET_COL_RECVD;
1281					flags |= ZFS_ITER_RECVD_PROPS;
1282					break;
1283				case 4:
1284					cb.cb_columns[i++] = GET_COL_SOURCE;
1285					break;
1286				case 5:
1287					if (i > 0) {
1288						(void) fprintf(stderr,
1289						    gettext("\"all\" conflicts "
1290						    "with specific fields "
1291						    "given to -o option\n"));
1292						usage(B_FALSE);
1293					}
1294					cb.cb_columns[0] = GET_COL_NAME;
1295					cb.cb_columns[1] = GET_COL_PROPERTY;
1296					cb.cb_columns[2] = GET_COL_VALUE;
1297					cb.cb_columns[3] = GET_COL_RECVD;
1298					cb.cb_columns[4] = GET_COL_SOURCE;
1299					flags |= ZFS_ITER_RECVD_PROPS;
1300					i = ZFS_GET_NCOLS;
1301					break;
1302				default:
1303					(void) fprintf(stderr,
1304					    gettext("invalid column name "
1305					    "'%s'\n"), value);
1306					usage(B_FALSE);
1307				}
1308			}
1309			break;
1310
1311		case 's':
1312			cb.cb_sources = 0;
1313			while (*optarg != '\0') {
1314				static char *source_subopts[] = {
1315					"local", "default", "inherited",
1316					"received", "temporary", "none",
1317					NULL };
1318
1319				switch (getsubopt(&optarg, source_subopts,
1320				    &value)) {
1321				case 0:
1322					cb.cb_sources |= ZPROP_SRC_LOCAL;
1323					break;
1324				case 1:
1325					cb.cb_sources |= ZPROP_SRC_DEFAULT;
1326					break;
1327				case 2:
1328					cb.cb_sources |= ZPROP_SRC_INHERITED;
1329					break;
1330				case 3:
1331					cb.cb_sources |= ZPROP_SRC_RECEIVED;
1332					break;
1333				case 4:
1334					cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1335					break;
1336				case 5:
1337					cb.cb_sources |= ZPROP_SRC_NONE;
1338					break;
1339				default:
1340					(void) fprintf(stderr,
1341					    gettext("invalid source "
1342					    "'%s'\n"), value);
1343					usage(B_FALSE);
1344				}
1345			}
1346			break;
1347
1348		case '?':
1349			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1350			    optopt);
1351			usage(B_FALSE);
1352		}
1353	}
1354
1355	argc -= optind;
1356	argv += optind;
1357
1358	if (argc < 1) {
1359		(void) fprintf(stderr, gettext("missing property "
1360		    "argument\n"));
1361		usage(B_FALSE);
1362	}
1363
1364	fields = argv[0];
1365
1366	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1367	    != 0)
1368		usage(B_FALSE);
1369
1370	argc--;
1371	argv++;
1372
1373	/*
1374	 * As part of zfs_expand_proplist(), we keep track of the maximum column
1375	 * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1376	 * need to know the maximum name length.  However, the user likely did
1377	 * not specify 'name' as one of the properties to fetch, so we need to
1378	 * make sure we always include at least this property for
1379	 * print_get_headers() to work properly.
1380	 */
1381	if (cb.cb_proplist != NULL) {
1382		fake_name.pl_prop = ZFS_PROP_NAME;
1383		fake_name.pl_width = strlen(gettext("NAME"));
1384		fake_name.pl_next = cb.cb_proplist;
1385		cb.cb_proplist = &fake_name;
1386	}
1387
1388	cb.cb_first = B_TRUE;
1389
1390	/* run for each object */
1391	ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1392	    &cb.cb_proplist, limit, get_callback, &cb);
1393
1394	if (cb.cb_proplist == &fake_name)
1395		zprop_free_list(fake_name.pl_next);
1396	else
1397		zprop_free_list(cb.cb_proplist);
1398
1399	return (ret);
1400}
1401
1402/*
1403 * inherit [-rS] <property> <fs|vol> ...
1404 *
1405 *	-r	Recurse over all children
1406 *	-S	Revert to received value, if any
1407 *
1408 * For each dataset specified on the command line, inherit the given property
1409 * from its parent.  Inheriting a property at the pool level will cause it to
1410 * use the default value.  The '-r' flag will recurse over all children, and is
1411 * useful for setting a property on a hierarchy-wide basis, regardless of any
1412 * local modifications for each dataset.
1413 */
1414
1415typedef struct inherit_cbdata {
1416	const char *cb_propname;
1417	boolean_t cb_received;
1418} inherit_cbdata_t;
1419
1420static int
1421inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1422{
1423	inherit_cbdata_t *cb = data;
1424	zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1425
1426	/*
1427	 * If we're doing it recursively, then ignore properties that
1428	 * are not valid for this type of dataset.
1429	 */
1430	if (prop != ZPROP_INVAL &&
1431	    !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1432		return (0);
1433
1434	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1435}
1436
1437static int
1438inherit_cb(zfs_handle_t *zhp, void *data)
1439{
1440	inherit_cbdata_t *cb = data;
1441
1442	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1443}
1444
1445static int
1446zfs_do_inherit(int argc, char **argv)
1447{
1448	int c;
1449	zfs_prop_t prop;
1450	inherit_cbdata_t cb = { 0 };
1451	char *propname;
1452	int ret;
1453	int flags = 0;
1454	boolean_t received = B_FALSE;
1455
1456	/* check options */
1457	while ((c = getopt(argc, argv, "rS")) != -1) {
1458		switch (c) {
1459		case 'r':
1460			flags |= ZFS_ITER_RECURSE;
1461			break;
1462		case 'S':
1463			received = B_TRUE;
1464			break;
1465		case '?':
1466		default:
1467			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1468			    optopt);
1469			usage(B_FALSE);
1470		}
1471	}
1472
1473	argc -= optind;
1474	argv += optind;
1475
1476	/* check number of arguments */
1477	if (argc < 1) {
1478		(void) fprintf(stderr, gettext("missing property argument\n"));
1479		usage(B_FALSE);
1480	}
1481	if (argc < 2) {
1482		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1483		usage(B_FALSE);
1484	}
1485
1486	propname = argv[0];
1487	argc--;
1488	argv++;
1489
1490	if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1491		if (zfs_prop_readonly(prop)) {
1492			(void) fprintf(stderr, gettext(
1493			    "%s property is read-only\n"),
1494			    propname);
1495			return (1);
1496		}
1497		if (!zfs_prop_inheritable(prop) && !received) {
1498			(void) fprintf(stderr, gettext("'%s' property cannot "
1499			    "be inherited\n"), propname);
1500			if (prop == ZFS_PROP_QUOTA ||
1501			    prop == ZFS_PROP_RESERVATION ||
1502			    prop == ZFS_PROP_REFQUOTA ||
1503			    prop == ZFS_PROP_REFRESERVATION)
1504				(void) fprintf(stderr, gettext("use 'zfs set "
1505				    "%s=none' to clear\n"), propname);
1506			return (1);
1507		}
1508	} else if (!zfs_prop_user(propname)) {
1509		(void) fprintf(stderr, gettext("invalid property '%s'\n"),
1510		    propname);
1511		usage(B_FALSE);
1512	}
1513
1514	cb.cb_propname = propname;
1515	cb.cb_received = received;
1516
1517	if (flags & ZFS_ITER_RECURSE) {
1518		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1519		    NULL, NULL, 0, inherit_recurse_cb, &cb);
1520	} else {
1521		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1522		    NULL, NULL, 0, inherit_cb, &cb);
1523	}
1524
1525	return (ret);
1526}
1527
1528typedef struct upgrade_cbdata {
1529	uint64_t cb_numupgraded;
1530	uint64_t cb_numsamegraded;
1531	uint64_t cb_numfailed;
1532	uint64_t cb_version;
1533	boolean_t cb_newer;
1534	boolean_t cb_foundone;
1535	char cb_lastfs[ZFS_MAXNAMELEN];
1536} upgrade_cbdata_t;
1537
1538static int
1539same_pool(zfs_handle_t *zhp, const char *name)
1540{
1541	int len1 = strcspn(name, "/@");
1542	const char *zhname = zfs_get_name(zhp);
1543	int len2 = strcspn(zhname, "/@");
1544
1545	if (len1 != len2)
1546		return (B_FALSE);
1547	return (strncmp(name, zhname, len1) == 0);
1548}
1549
1550static int
1551upgrade_list_callback(zfs_handle_t *zhp, void *data)
1552{
1553	upgrade_cbdata_t *cb = data;
1554	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1555
1556	/* list if it's old/new */
1557	if ((!cb->cb_newer && version < ZPL_VERSION) ||
1558	    (cb->cb_newer && version > ZPL_VERSION)) {
1559		char *str;
1560		if (cb->cb_newer) {
1561			str = gettext("The following filesystems are "
1562			    "formatted using a newer software version and\n"
1563			    "cannot be accessed on the current system.\n\n");
1564		} else {
1565			str = gettext("The following filesystems are "
1566			    "out of date, and can be upgraded.  After being\n"
1567			    "upgraded, these filesystems (and any 'zfs send' "
1568			    "streams generated from\n"
1569			    "subsequent snapshots) will no longer be "
1570			    "accessible by older software versions.\n\n");
1571		}
1572
1573		if (!cb->cb_foundone) {
1574			(void) puts(str);
1575			(void) printf(gettext("VER  FILESYSTEM\n"));
1576			(void) printf(gettext("---  ------------\n"));
1577			cb->cb_foundone = B_TRUE;
1578		}
1579
1580		(void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1581	}
1582
1583	return (0);
1584}
1585
1586static int
1587upgrade_set_callback(zfs_handle_t *zhp, void *data)
1588{
1589	upgrade_cbdata_t *cb = data;
1590	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1591	int i;
1592	static struct { int zplver; int spaver; } table[] = {
1593		{ZPL_VERSION_FUID, SPA_VERSION_FUID},
1594		{ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
1595		{0, 0}
1596	};
1597
1598
1599	for (i = 0; table[i].zplver; i++) {
1600		if (cb->cb_version >= table[i].zplver) {
1601			int spa_version;
1602
1603			if (zfs_spa_version(zhp, &spa_version) < 0)
1604				return (-1);
1605
1606			if (spa_version < table[i].spaver) {
1607				/* can't upgrade */
1608				(void) printf(gettext("%s: can not be "
1609				    "upgraded; the pool version needs to first "
1610				    "be upgraded\nto version %d\n\n"),
1611				    zfs_get_name(zhp), table[i].spaver);
1612				cb->cb_numfailed++;
1613				return (0);
1614			}
1615		}
1616	}
1617
1618	/* upgrade */
1619	if (version < cb->cb_version) {
1620		char verstr[16];
1621		(void) snprintf(verstr, sizeof (verstr),
1622		    "%llu", cb->cb_version);
1623		if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1624			/*
1625			 * If they did "zfs upgrade -a", then we could
1626			 * be doing ioctls to different pools.  We need
1627			 * to log this history once to each pool.
1628			 */
1629			verify(zpool_stage_history(g_zfs, history_str) == 0);
1630		}
1631		if (zfs_prop_set(zhp, "version", verstr) == 0)
1632			cb->cb_numupgraded++;
1633		else
1634			cb->cb_numfailed++;
1635		(void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1636	} else if (version > cb->cb_version) {
1637		/* can't downgrade */
1638		(void) printf(gettext("%s: can not be downgraded; "
1639		    "it is already at version %u\n"),
1640		    zfs_get_name(zhp), version);
1641		cb->cb_numfailed++;
1642	} else {
1643		cb->cb_numsamegraded++;
1644	}
1645	return (0);
1646}
1647
1648/*
1649 * zfs upgrade
1650 * zfs upgrade -v
1651 * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1652 */
1653static int
1654zfs_do_upgrade(int argc, char **argv)
1655{
1656	boolean_t all = B_FALSE;
1657	boolean_t showversions = B_FALSE;
1658	int ret;
1659	upgrade_cbdata_t cb = { 0 };
1660	char c;
1661	int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1662
1663	/* check options */
1664	while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1665		switch (c) {
1666		case 'r':
1667			flags |= ZFS_ITER_RECURSE;
1668			break;
1669		case 'v':
1670			showversions = B_TRUE;
1671			break;
1672		case 'V':
1673			if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1674			    optarg, &cb.cb_version) != 0) {
1675				(void) fprintf(stderr,
1676				    gettext("invalid version %s\n"), optarg);
1677				usage(B_FALSE);
1678			}
1679			break;
1680		case 'a':
1681			all = B_TRUE;
1682			break;
1683		case '?':
1684		default:
1685			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1686			    optopt);
1687			usage(B_FALSE);
1688		}
1689	}
1690
1691	argc -= optind;
1692	argv += optind;
1693
1694	if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1695		usage(B_FALSE);
1696	if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1697	    cb.cb_version || argc))
1698		usage(B_FALSE);
1699	if ((all || argc) && (showversions))
1700		usage(B_FALSE);
1701	if (all && argc)
1702		usage(B_FALSE);
1703
1704	if (showversions) {
1705		/* Show info on available versions. */
1706		(void) printf(gettext("The following filesystem versions are "
1707		    "supported:\n\n"));
1708		(void) printf(gettext("VER  DESCRIPTION\n"));
1709		(void) printf("---  -----------------------------------------"
1710		    "---------------\n");
1711		(void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1712		(void) printf(gettext(" 2   Enhanced directory entries\n"));
1713		(void) printf(gettext(" 3   Case insensitive and File system "
1714		    "unique identifier (FUID)\n"));
1715		(void) printf(gettext(" 4   userquota, groupquota "
1716		    "properties\n"));
1717		(void) printf(gettext("\nFor more information on a particular "
1718		    "version, including supported releases, see:\n\n"));
1719		(void) printf("http://www.opensolaris.org/os/community/zfs/"
1720		    "version/zpl/N\n\n");
1721		(void) printf(gettext("Where 'N' is the version number.\n"));
1722		ret = 0;
1723	} else if (argc || all) {
1724		/* Upgrade filesystems */
1725		if (cb.cb_version == 0)
1726			cb.cb_version = ZPL_VERSION;
1727		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1728		    NULL, NULL, 0, upgrade_set_callback, &cb);
1729		(void) printf(gettext("%llu filesystems upgraded\n"),
1730		    cb.cb_numupgraded);
1731		if (cb.cb_numsamegraded) {
1732			(void) printf(gettext("%llu filesystems already at "
1733			    "this version\n"),
1734			    cb.cb_numsamegraded);
1735		}
1736		if (cb.cb_numfailed != 0)
1737			ret = 1;
1738	} else {
1739		/* List old-version filesytems */
1740		boolean_t found;
1741		(void) printf(gettext("This system is currently running "
1742		    "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1743
1744		flags |= ZFS_ITER_RECURSE;
1745		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1746		    NULL, NULL, 0, upgrade_list_callback, &cb);
1747
1748		found = cb.cb_foundone;
1749		cb.cb_foundone = B_FALSE;
1750		cb.cb_newer = B_TRUE;
1751
1752		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1753		    NULL, NULL, 0, upgrade_list_callback, &cb);
1754
1755		if (!cb.cb_foundone && !found) {
1756			(void) printf(gettext("All filesystems are "
1757			    "formatted with the current version.\n"));
1758		}
1759	}
1760
1761	return (ret);
1762}
1763
1764/*
1765 * zfs userspace
1766 */
1767static int
1768userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
1769{
1770	zfs_userquota_prop_t *typep = arg;
1771	zfs_userquota_prop_t p = *typep;
1772	char *name = NULL;
1773	char *ug, *propname;
1774	char namebuf[32];
1775	char sizebuf[32];
1776
1777	if (domain == NULL || domain[0] == '\0') {
1778		if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) {
1779			struct group *g = getgrgid(rid);
1780			if (g)
1781				name = g->gr_name;
1782		} else {
1783			struct passwd *p = getpwuid(rid);
1784			if (p)
1785				name = p->pw_name;
1786		}
1787	}
1788
1789	if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA)
1790		ug = "group";
1791	else
1792		ug = "user";
1793
1794	if (p == ZFS_PROP_USERUSED || p == ZFS_PROP_GROUPUSED)
1795		propname = "used";
1796	else
1797		propname = "quota";
1798
1799	if (name == NULL) {
1800		(void) snprintf(namebuf, sizeof (namebuf),
1801		    "%llu", (longlong_t)rid);
1802		name = namebuf;
1803	}
1804	zfs_nicenum(space, sizebuf, sizeof (sizebuf));
1805
1806	(void) printf("%s %s %s%c%s %s\n", propname, ug, domain,
1807	    domain[0] ? '-' : ' ', name, sizebuf);
1808
1809	return (0);
1810}
1811
1812static int
1813zfs_do_userspace(int argc, char **argv)
1814{
1815	zfs_handle_t *zhp;
1816	zfs_userquota_prop_t p;
1817	int error;
1818
1819	/*
1820	 * Try the python version.  If the execv fails, we'll continue
1821	 * and do a simplistic implementation.
1822	 */
1823	(void) execv(pypath, argv-1);
1824
1825	(void) printf("internal error: %s not found\n"
1826	    "falling back on built-in implementation, "
1827	    "some features will not work\n", pypath);
1828
1829	if ((zhp = zfs_open(g_zfs, argv[argc-1], ZFS_TYPE_DATASET)) == NULL)
1830		return (1);
1831
1832	(void) printf("PROP TYPE NAME VALUE\n");
1833
1834	for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
1835		error = zfs_userspace(zhp, p, userspace_cb, &p);
1836		if (error)
1837			break;
1838	}
1839	return (error);
1840}
1841
1842/*
1843 * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
1844 *      [-s property [-s property]...] [-S property [-S property]...]
1845 *      <dataset> ...
1846 *
1847 *	-r	Recurse over all children
1848 *	-d	Limit recursion by depth.
1849 *	-H	Scripted mode; elide headers and separate columns by tabs
1850 *	-o	Control which fields to display.
1851 *	-t	Control which object types to display.
1852 *	-s	Specify sort columns, descending order.
1853 *	-S	Specify sort columns, ascending order.
1854 *
1855 * When given no arguments, lists all filesystems in the system.
1856 * Otherwise, list the specified datasets, optionally recursing down them if
1857 * '-r' is specified.
1858 */
1859typedef struct list_cbdata {
1860	boolean_t	cb_first;
1861	boolean_t	cb_scripted;
1862	zprop_list_t	*cb_proplist;
1863} list_cbdata_t;
1864
1865/*
1866 * Given a list of columns to display, output appropriate headers for each one.
1867 */
1868static void
1869print_header(zprop_list_t *pl)
1870{
1871	char headerbuf[ZFS_MAXPROPLEN];
1872	const char *header;
1873	int i;
1874	boolean_t first = B_TRUE;
1875	boolean_t right_justify;
1876
1877	for (; pl != NULL; pl = pl->pl_next) {
1878		if (!first) {
1879			(void) printf("  ");
1880		} else {
1881			first = B_FALSE;
1882		}
1883
1884		right_justify = B_FALSE;
1885		if (pl->pl_prop != ZPROP_INVAL) {
1886			header = zfs_prop_column_name(pl->pl_prop);
1887			right_justify = zfs_prop_align_right(pl->pl_prop);
1888		} else {
1889			for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1890				headerbuf[i] = toupper(pl->pl_user_prop[i]);
1891			headerbuf[i] = '\0';
1892			header = headerbuf;
1893		}
1894
1895		if (pl->pl_next == NULL && !right_justify)
1896			(void) printf("%s", header);
1897		else if (right_justify)
1898			(void) printf("%*s", pl->pl_width, header);
1899		else
1900			(void) printf("%-*s", pl->pl_width, header);
1901	}
1902
1903	(void) printf("\n");
1904}
1905
1906/*
1907 * Given a dataset and a list of fields, print out all the properties according
1908 * to the described layout.
1909 */
1910static void
1911print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1912{
1913	boolean_t first = B_TRUE;
1914	char property[ZFS_MAXPROPLEN];
1915	nvlist_t *userprops = zfs_get_user_props(zhp);
1916	nvlist_t *propval;
1917	char *propstr;
1918	boolean_t right_justify;
1919	int width;
1920
1921	for (; pl != NULL; pl = pl->pl_next) {
1922		if (!first) {
1923			if (scripted)
1924				(void) printf("\t");
1925			else
1926				(void) printf("  ");
1927		} else {
1928			first = B_FALSE;
1929		}
1930
1931		if (pl->pl_prop != ZPROP_INVAL) {
1932			if (zfs_prop_get(zhp, pl->pl_prop, property,
1933			    sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
1934				propstr = "-";
1935			else
1936				propstr = property;
1937
1938			right_justify = zfs_prop_align_right(pl->pl_prop);
1939		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1940			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1941			    property, sizeof (property), B_FALSE) != 0)
1942				propstr = "-";
1943			else
1944				propstr = property;
1945			right_justify = B_TRUE;
1946		} else {
1947			if (nvlist_lookup_nvlist(userprops,
1948			    pl->pl_user_prop, &propval) != 0)
1949				propstr = "-";
1950			else
1951				verify(nvlist_lookup_string(propval,
1952				    ZPROP_VALUE, &propstr) == 0);
1953			right_justify = B_FALSE;
1954		}
1955
1956		width = pl->pl_width;
1957
1958		/*
1959		 * If this is being called in scripted mode, or if this is the
1960		 * last column and it is left-justified, don't include a width
1961		 * format specifier.
1962		 */
1963		if (scripted || (pl->pl_next == NULL && !right_justify))
1964			(void) printf("%s", propstr);
1965		else if (right_justify)
1966			(void) printf("%*s", width, propstr);
1967		else
1968			(void) printf("%-*s", width, propstr);
1969	}
1970
1971	(void) printf("\n");
1972}
1973
1974/*
1975 * Generic callback function to list a dataset or snapshot.
1976 */
1977static int
1978list_callback(zfs_handle_t *zhp, void *data)
1979{
1980	list_cbdata_t *cbp = data;
1981
1982	if (cbp->cb_first) {
1983		if (!cbp->cb_scripted)
1984			print_header(cbp->cb_proplist);
1985		cbp->cb_first = B_FALSE;
1986	}
1987
1988	print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
1989
1990	return (0);
1991}
1992
1993static int
1994zfs_do_list(int argc, char **argv)
1995{
1996	int c;
1997	boolean_t scripted = B_FALSE;
1998	static char default_fields[] =
1999	    "name,used,available,referenced,mountpoint";
2000	int types = ZFS_TYPE_DATASET;
2001	boolean_t types_specified = B_FALSE;
2002	char *fields = NULL;
2003	list_cbdata_t cb = { 0 };
2004	char *value;
2005	int limit = 0;
2006	int ret;
2007	zfs_sort_column_t *sortcol = NULL;
2008	int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
2009
2010	/* check options */
2011	while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
2012		switch (c) {
2013		case 'o':
2014			fields = optarg;
2015			break;
2016		case 'd':
2017			limit = parse_depth(optarg, &flags);
2018			break;
2019		case 'r':
2020			flags |= ZFS_ITER_RECURSE;
2021			break;
2022		case 'H':
2023			scripted = B_TRUE;
2024			break;
2025		case 's':
2026			if (zfs_add_sort_column(&sortcol, optarg,
2027			    B_FALSE) != 0) {
2028				(void) fprintf(stderr,
2029				    gettext("invalid property '%s'\n"), optarg);
2030				usage(B_FALSE);
2031			}
2032			break;
2033		case 'S':
2034			if (zfs_add_sort_column(&sortcol, optarg,
2035			    B_TRUE) != 0) {
2036				(void) fprintf(stderr,
2037				    gettext("invalid property '%s'\n"), optarg);
2038				usage(B_FALSE);
2039			}
2040			break;
2041		case 't':
2042			types = 0;
2043			types_specified = B_TRUE;
2044			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
2045			while (*optarg != '\0') {
2046				static char *type_subopts[] = { "filesystem",
2047				    "volume", "snapshot", "all", NULL };
2048
2049				switch (getsubopt(&optarg, type_subopts,
2050				    &value)) {
2051				case 0:
2052					types |= ZFS_TYPE_FILESYSTEM;
2053					break;
2054				case 1:
2055					types |= ZFS_TYPE_VOLUME;
2056					break;
2057				case 2:
2058					types |= ZFS_TYPE_SNAPSHOT;
2059					break;
2060				case 3:
2061					types = ZFS_TYPE_DATASET;
2062					break;
2063
2064				default:
2065					(void) fprintf(stderr,
2066					    gettext("invalid type '%s'\n"),
2067					    value);
2068					usage(B_FALSE);
2069				}
2070			}
2071			break;
2072		case ':':
2073			(void) fprintf(stderr, gettext("missing argument for "
2074			    "'%c' option\n"), optopt);
2075			usage(B_FALSE);
2076			break;
2077		case '?':
2078			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2079			    optopt);
2080			usage(B_FALSE);
2081		}
2082	}
2083
2084	argc -= optind;
2085	argv += optind;
2086
2087	if (fields == NULL)
2088		fields = default_fields;
2089
2090	/*
2091	 * If "-o space" and no types were specified, don't display snapshots.
2092	 */
2093	if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
2094		types &= ~ZFS_TYPE_SNAPSHOT;
2095
2096	/*
2097	 * If the user specifies '-o all', the zprop_get_list() doesn't
2098	 * normally include the name of the dataset.  For 'zfs list', we always
2099	 * want this property to be first.
2100	 */
2101	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
2102	    != 0)
2103		usage(B_FALSE);
2104
2105	cb.cb_scripted = scripted;
2106	cb.cb_first = B_TRUE;
2107
2108	ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
2109	    limit, list_callback, &cb);
2110
2111	zprop_free_list(cb.cb_proplist);
2112	zfs_free_sort_columns(sortcol);
2113
2114	if (ret == 0 && cb.cb_first && !cb.cb_scripted)
2115		(void) printf(gettext("no datasets available\n"));
2116
2117	return (ret);
2118}
2119
2120/*
2121 * zfs rename <fs | snap | vol> <fs | snap | vol>
2122 * zfs rename -p <fs | vol> <fs | vol>
2123 * zfs rename -r <snap> <snap>
2124 *
2125 * Renames the given dataset to another of the same type.
2126 *
2127 * The '-p' flag creates all the non-existing ancestors of the target first.
2128 */
2129/* ARGSUSED */
2130static int
2131zfs_do_rename(int argc, char **argv)
2132{
2133	zfs_handle_t *zhp;
2134	int c;
2135	int ret;
2136	boolean_t recurse = B_FALSE;
2137	boolean_t parents = B_FALSE;
2138
2139	/* check options */
2140	while ((c = getopt(argc, argv, "pr")) != -1) {
2141		switch (c) {
2142		case 'p':
2143			parents = B_TRUE;
2144			break;
2145		case 'r':
2146			recurse = B_TRUE;
2147			break;
2148		case '?':
2149		default:
2150			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2151			    optopt);
2152			usage(B_FALSE);
2153		}
2154	}
2155
2156	argc -= optind;
2157	argv += optind;
2158
2159	/* check number of arguments */
2160	if (argc < 1) {
2161		(void) fprintf(stderr, gettext("missing source dataset "
2162		    "argument\n"));
2163		usage(B_FALSE);
2164	}
2165	if (argc < 2) {
2166		(void) fprintf(stderr, gettext("missing target dataset "
2167		    "argument\n"));
2168		usage(B_FALSE);
2169	}
2170	if (argc > 2) {
2171		(void) fprintf(stderr, gettext("too many arguments\n"));
2172		usage(B_FALSE);
2173	}
2174
2175	if (recurse && parents) {
2176		(void) fprintf(stderr, gettext("-p and -r options are mutually "
2177		    "exclusive\n"));
2178		usage(B_FALSE);
2179	}
2180
2181	if (recurse && strchr(argv[0], '@') == 0) {
2182		(void) fprintf(stderr, gettext("source dataset for recursive "
2183		    "rename must be a snapshot\n"));
2184		usage(B_FALSE);
2185	}
2186
2187	if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
2188	    ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
2189		return (1);
2190
2191	/* If we were asked and the name looks good, try to create ancestors. */
2192	if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
2193	    zfs_create_ancestors(g_zfs, argv[1]) != 0) {
2194		zfs_close(zhp);
2195		return (1);
2196	}
2197
2198	ret = (zfs_rename(zhp, argv[1], recurse) != 0);
2199
2200	zfs_close(zhp);
2201	return (ret);
2202}
2203
2204/*
2205 * zfs promote <fs>
2206 *
2207 * Promotes the given clone fs to be the parent
2208 */
2209/* ARGSUSED */
2210static int
2211zfs_do_promote(int argc, char **argv)
2212{
2213	zfs_handle_t *zhp;
2214	int ret;
2215
2216	/* check options */
2217	if (argc > 1 && argv[1][0] == '-') {
2218		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2219		    argv[1][1]);
2220		usage(B_FALSE);
2221	}
2222
2223	/* check number of arguments */
2224	if (argc < 2) {
2225		(void) fprintf(stderr, gettext("missing clone filesystem"
2226		    " argument\n"));
2227		usage(B_FALSE);
2228	}
2229	if (argc > 2) {
2230		(void) fprintf(stderr, gettext("too many arguments\n"));
2231		usage(B_FALSE);
2232	}
2233
2234	zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2235	if (zhp == NULL)
2236		return (1);
2237
2238	ret = (zfs_promote(zhp) != 0);
2239
2240
2241	zfs_close(zhp);
2242	return (ret);
2243}
2244
2245/*
2246 * zfs rollback [-rRf] <snapshot>
2247 *
2248 *	-r	Delete any intervening snapshots before doing rollback
2249 *	-R	Delete any snapshots and their clones
2250 *	-f	ignored for backwards compatability
2251 *
2252 * Given a filesystem, rollback to a specific snapshot, discarding any changes
2253 * since then and making it the active dataset.  If more recent snapshots exist,
2254 * the command will complain unless the '-r' flag is given.
2255 */
2256typedef struct rollback_cbdata {
2257	uint64_t	cb_create;
2258	boolean_t	cb_first;
2259	int		cb_doclones;
2260	char		*cb_target;
2261	int		cb_error;
2262	boolean_t	cb_recurse;
2263	boolean_t	cb_dependent;
2264} rollback_cbdata_t;
2265
2266/*
2267 * Report any snapshots more recent than the one specified.  Used when '-r' is
2268 * not specified.  We reuse this same callback for the snapshot dependents - if
2269 * 'cb_dependent' is set, then this is a dependent and we should report it
2270 * without checking the transaction group.
2271 */
2272static int
2273rollback_check(zfs_handle_t *zhp, void *data)
2274{
2275	rollback_cbdata_t *cbp = data;
2276
2277	if (cbp->cb_doclones) {
2278		zfs_close(zhp);
2279		return (0);
2280	}
2281
2282	if (!cbp->cb_dependent) {
2283		if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
2284		    zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
2285		    zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
2286		    cbp->cb_create) {
2287
2288			if (cbp->cb_first && !cbp->cb_recurse) {
2289				(void) fprintf(stderr, gettext("cannot "
2290				    "rollback to '%s': more recent snapshots "
2291				    "exist\n"),
2292				    cbp->cb_target);
2293				(void) fprintf(stderr, gettext("use '-r' to "
2294				    "force deletion of the following "
2295				    "snapshots:\n"));
2296				cbp->cb_first = 0;
2297				cbp->cb_error = 1;
2298			}
2299
2300			if (cbp->cb_recurse) {
2301				cbp->cb_dependent = B_TRUE;
2302				if (zfs_iter_dependents(zhp, B_TRUE,
2303				    rollback_check, cbp) != 0) {
2304					zfs_close(zhp);
2305					return (-1);
2306				}
2307				cbp->cb_dependent = B_FALSE;
2308			} else {
2309				(void) fprintf(stderr, "%s\n",
2310				    zfs_get_name(zhp));
2311			}
2312		}
2313	} else {
2314		if (cbp->cb_first && cbp->cb_recurse) {
2315			(void) fprintf(stderr, gettext("cannot rollback to "
2316			    "'%s': clones of previous snapshots exist\n"),
2317			    cbp->cb_target);
2318			(void) fprintf(stderr, gettext("use '-R' to "
2319			    "force deletion of the following clones and "
2320			    "dependents:\n"));
2321			cbp->cb_first = 0;
2322			cbp->cb_error = 1;
2323		}
2324
2325		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2326	}
2327
2328	zfs_close(zhp);
2329	return (0);
2330}
2331
2332static int
2333zfs_do_rollback(int argc, char **argv)
2334{
2335	int ret;
2336	int c;
2337	boolean_t force = B_FALSE;
2338	rollback_cbdata_t cb = { 0 };
2339	zfs_handle_t *zhp, *snap;
2340	char parentname[ZFS_MAXNAMELEN];
2341	char *delim;
2342
2343	/* check options */
2344	while ((c = getopt(argc, argv, "rRf")) != -1) {
2345		switch (c) {
2346		case 'r':
2347			cb.cb_recurse = 1;
2348			break;
2349		case 'R':
2350			cb.cb_recurse = 1;
2351			cb.cb_doclones = 1;
2352			break;
2353		case 'f':
2354			force = B_TRUE;
2355			break;
2356		case '?':
2357			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2358			    optopt);
2359			usage(B_FALSE);
2360		}
2361	}
2362
2363	argc -= optind;
2364	argv += optind;
2365
2366	/* check number of arguments */
2367	if (argc < 1) {
2368		(void) fprintf(stderr, gettext("missing dataset argument\n"));
2369		usage(B_FALSE);
2370	}
2371	if (argc > 1) {
2372		(void) fprintf(stderr, gettext("too many arguments\n"));
2373		usage(B_FALSE);
2374	}
2375
2376	/* open the snapshot */
2377	if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2378		return (1);
2379
2380	/* open the parent dataset */
2381	(void) strlcpy(parentname, argv[0], sizeof (parentname));
2382	verify((delim = strrchr(parentname, '@')) != NULL);
2383	*delim = '\0';
2384	if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2385		zfs_close(snap);
2386		return (1);
2387	}
2388
2389	/*
2390	 * Check for more recent snapshots and/or clones based on the presence
2391	 * of '-r' and '-R'.
2392	 */
2393	cb.cb_target = argv[0];
2394	cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2395	cb.cb_first = B_TRUE;
2396	cb.cb_error = 0;
2397	if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2398		goto out;
2399
2400	if ((ret = cb.cb_error) != 0)
2401		goto out;
2402
2403	/*
2404	 * Rollback parent to the given snapshot.
2405	 */
2406	ret = zfs_rollback(zhp, snap, force);
2407
2408out:
2409	zfs_close(snap);
2410	zfs_close(zhp);
2411
2412	if (ret == 0)
2413		return (0);
2414	else
2415		return (1);
2416}
2417
2418/*
2419 * zfs set property=value { fs | snap | vol } ...
2420 *
2421 * Sets the given property for all datasets specified on the command line.
2422 */
2423typedef struct set_cbdata {
2424	char		*cb_propname;
2425	char		*cb_value;
2426} set_cbdata_t;
2427
2428static int
2429set_callback(zfs_handle_t *zhp, void *data)
2430{
2431	set_cbdata_t *cbp = data;
2432
2433	if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2434		switch (libzfs_errno(g_zfs)) {
2435		case EZFS_MOUNTFAILED:
2436			(void) fprintf(stderr, gettext("property may be set "
2437			    "but unable to remount filesystem\n"));
2438			break;
2439		case EZFS_SHARENFSFAILED:
2440			(void) fprintf(stderr, gettext("property may be set "
2441			    "but unable to reshare filesystem\n"));
2442			break;
2443		}
2444		return (1);
2445	}
2446	return (0);
2447}
2448
2449static int
2450zfs_do_set(int argc, char **argv)
2451{
2452	set_cbdata_t cb;
2453	int ret;
2454
2455	/* check for options */
2456	if (argc > 1 && argv[1][0] == '-') {
2457		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2458		    argv[1][1]);
2459		usage(B_FALSE);
2460	}
2461
2462	/* check number of arguments */
2463	if (argc < 2) {
2464		(void) fprintf(stderr, gettext("missing property=value "
2465		    "argument\n"));
2466		usage(B_FALSE);
2467	}
2468	if (argc < 3) {
2469		(void) fprintf(stderr, gettext("missing dataset name\n"));
2470		usage(B_FALSE);
2471	}
2472
2473	/* validate property=value argument */
2474	cb.cb_propname = argv[1];
2475	if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
2476	    (cb.cb_value[1] == '\0')) {
2477		(void) fprintf(stderr, gettext("missing value in "
2478		    "property=value argument\n"));
2479		usage(B_FALSE);
2480	}
2481
2482	*cb.cb_value = '\0';
2483	cb.cb_value++;
2484
2485	if (*cb.cb_propname == '\0') {
2486		(void) fprintf(stderr,
2487		    gettext("missing property in property=value argument\n"));
2488		usage(B_FALSE);
2489	}
2490
2491	ret = zfs_for_each(argc - 2, argv + 2, NULL,
2492	    ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
2493
2494	return (ret);
2495}
2496
2497/*
2498 * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
2499 *
2500 * Creates a snapshot with the given name.  While functionally equivalent to
2501 * 'zfs create', it is a separate command to differentiate intent.
2502 */
2503static int
2504zfs_do_snapshot(int argc, char **argv)
2505{
2506	boolean_t recursive = B_FALSE;
2507	int ret;
2508	char c;
2509	nvlist_t *props;
2510
2511	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
2512		(void) fprintf(stderr, gettext("internal error: "
2513		    "out of memory\n"));
2514		return (1);
2515	}
2516
2517	/* check options */
2518	while ((c = getopt(argc, argv, "ro:")) != -1) {
2519		switch (c) {
2520		case 'o':
2521			if (parseprop(props))
2522				return (1);
2523			break;
2524		case 'r':
2525			recursive = B_TRUE;
2526			break;
2527		case '?':
2528			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2529			    optopt);
2530			goto usage;
2531		}
2532	}
2533
2534	argc -= optind;
2535	argv += optind;
2536
2537	/* check number of arguments */
2538	if (argc < 1) {
2539		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2540		goto usage;
2541	}
2542	if (argc > 1) {
2543		(void) fprintf(stderr, gettext("too many arguments\n"));
2544		goto usage;
2545	}
2546
2547	ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
2548	nvlist_free(props);
2549	if (ret && recursive)
2550		(void) fprintf(stderr, gettext("no snapshots were created\n"));
2551	return (ret != 0);
2552
2553usage:
2554	nvlist_free(props);
2555	usage(B_FALSE);
2556	return (-1);
2557}
2558
2559/*
2560 * zfs send [-vDp] -R [-i|-I <@snap>] <fs@snap>
2561 * zfs send [-vDp] [-i|-I <@snap>] <fs@snap>
2562 *
2563 * Send a backup stream to stdout.
2564 */
2565static int
2566zfs_do_send(int argc, char **argv)
2567{
2568	char *fromname = NULL;
2569	char *toname = NULL;
2570	char *cp;
2571	zfs_handle_t *zhp;
2572	sendflags_t flags = { 0 };
2573	int c, err;
2574
2575	/* check options */
2576	while ((c = getopt(argc, argv, ":i:I:RDpv")) != -1) {
2577		switch (c) {
2578		case 'i':
2579			if (fromname)
2580				usage(B_FALSE);
2581			fromname = optarg;
2582			break;
2583		case 'I':
2584			if (fromname)
2585				usage(B_FALSE);
2586			fromname = optarg;
2587			flags.doall = B_TRUE;
2588			break;
2589		case 'R':
2590			flags.replicate = B_TRUE;
2591			break;
2592		case 'p':
2593			flags.props = B_TRUE;
2594			break;
2595		case 'v':
2596			flags.verbose = B_TRUE;
2597			break;
2598		case 'D':
2599			flags.dedup = B_TRUE;
2600			break;
2601		case ':':
2602			(void) fprintf(stderr, gettext("missing argument for "
2603			    "'%c' option\n"), optopt);
2604			usage(B_FALSE);
2605			break;
2606		case '?':
2607			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2608			    optopt);
2609			usage(B_FALSE);
2610		}
2611	}
2612
2613	argc -= optind;
2614	argv += optind;
2615
2616	/* check number of arguments */
2617	if (argc < 1) {
2618		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2619		usage(B_FALSE);
2620	}
2621	if (argc > 1) {
2622		(void) fprintf(stderr, gettext("too many arguments\n"));
2623		usage(B_FALSE);
2624	}
2625
2626	if (isatty(STDOUT_FILENO)) {
2627		(void) fprintf(stderr,
2628		    gettext("Error: Stream can not be written to a terminal.\n"
2629		    "You must redirect standard output.\n"));
2630		return (1);
2631	}
2632
2633	cp = strchr(argv[0], '@');
2634	if (cp == NULL) {
2635		(void) fprintf(stderr,
2636		    gettext("argument must be a snapshot\n"));
2637		usage(B_FALSE);
2638	}
2639	*cp = '\0';
2640	toname = cp + 1;
2641	zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2642	if (zhp == NULL)
2643		return (1);
2644
2645	/*
2646	 * If they specified the full path to the snapshot, chop off
2647	 * everything except the short name of the snapshot, but special
2648	 * case if they specify the origin.
2649	 */
2650	if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2651		char origin[ZFS_MAXNAMELEN];
2652		zprop_source_t src;
2653
2654		(void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2655		    origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2656
2657		if (strcmp(origin, fromname) == 0) {
2658			fromname = NULL;
2659			flags.fromorigin = B_TRUE;
2660		} else {
2661			*cp = '\0';
2662			if (cp != fromname && strcmp(argv[0], fromname)) {
2663				(void) fprintf(stderr,
2664				    gettext("incremental source must be "
2665				    "in same filesystem\n"));
2666				usage(B_FALSE);
2667			}
2668			fromname = cp + 1;
2669			if (strchr(fromname, '@') || strchr(fromname, '/')) {
2670				(void) fprintf(stderr,
2671				    gettext("invalid incremental source\n"));
2672				usage(B_FALSE);
2673			}
2674		}
2675	}
2676
2677	if (flags.replicate && fromname == NULL)
2678		flags.doall = B_TRUE;
2679
2680	err = zfs_send(zhp, fromname, toname, flags, STDOUT_FILENO, NULL, 0);
2681	zfs_close(zhp);
2682
2683	return (err != 0);
2684}
2685
2686/*
2687 * zfs receive [-denvF] <fs@snap>
2688 *
2689 * Restore a backup stream from stdin.
2690 */
2691static int
2692zfs_do_receive(int argc, char **argv)
2693{
2694	int c, err;
2695	recvflags_t flags = { 0 };
2696
2697	/* check options */
2698	while ((c = getopt(argc, argv, ":denuvF")) != -1) {
2699		switch (c) {
2700		case 'd':
2701			flags.isprefix = B_TRUE;
2702			break;
2703		case 'e':
2704			flags.isprefix = B_TRUE;
2705			flags.istail = B_TRUE;
2706			break;
2707		case 'n':
2708			flags.dryrun = B_TRUE;
2709			break;
2710		case 'u':
2711			flags.nomount = B_TRUE;
2712			break;
2713		case 'v':
2714			flags.verbose = B_TRUE;
2715			break;
2716		case 'F':
2717			flags.force = B_TRUE;
2718			break;
2719		case ':':
2720			(void) fprintf(stderr, gettext("missing argument for "
2721			    "'%c' option\n"), optopt);
2722			usage(B_FALSE);
2723			break;
2724		case '?':
2725			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2726			    optopt);
2727			usage(B_FALSE);
2728		}
2729	}
2730
2731	argc -= optind;
2732	argv += optind;
2733
2734	/* check number of arguments */
2735	if (argc < 1) {
2736		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2737		usage(B_FALSE);
2738	}
2739	if (argc > 1) {
2740		(void) fprintf(stderr, gettext("too many arguments\n"));
2741		usage(B_FALSE);
2742	}
2743
2744	if (isatty(STDIN_FILENO)) {
2745		(void) fprintf(stderr,
2746		    gettext("Error: Backup stream can not be read "
2747		    "from a terminal.\n"
2748		    "You must redirect standard input.\n"));
2749		return (1);
2750	}
2751
2752	err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2753
2754	return (err != 0);
2755}
2756
2757static int
2758zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
2759{
2760	int errors = 0;
2761	int i;
2762	const char *tag;
2763	boolean_t recursive = B_FALSE;
2764	boolean_t temphold = B_FALSE;
2765	const char *opts = holding ? "rt" : "r";
2766	int c;
2767
2768	/* check options */
2769	while ((c = getopt(argc, argv, opts)) != -1) {
2770		switch (c) {
2771		case 'r':
2772			recursive = B_TRUE;
2773			break;
2774		case 't':
2775			temphold = B_TRUE;
2776			break;
2777		case '?':
2778			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2779			    optopt);
2780			usage(B_FALSE);
2781		}
2782	}
2783
2784	argc -= optind;
2785	argv += optind;
2786
2787	/* check number of arguments */
2788	if (argc < 2)
2789		usage(B_FALSE);
2790
2791	tag = argv[0];
2792	--argc;
2793	++argv;
2794
2795	if (holding && tag[0] == '.') {
2796		/* tags starting with '.' are reserved for libzfs */
2797		(void) fprintf(stderr, gettext("tag may not start with '.'\n"));
2798		usage(B_FALSE);
2799	}
2800
2801	for (i = 0; i < argc; ++i) {
2802		zfs_handle_t *zhp;
2803		char parent[ZFS_MAXNAMELEN];
2804		const char *delim;
2805		char *path = argv[i];
2806
2807		delim = strchr(path, '@');
2808		if (delim == NULL) {
2809			(void) fprintf(stderr,
2810			    gettext("'%s' is not a snapshot\n"), path);
2811			++errors;
2812			continue;
2813		}
2814		(void) strncpy(parent, path, delim - path);
2815		parent[delim - path] = '\0';
2816
2817		zhp = zfs_open(g_zfs, parent,
2818		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2819		if (zhp == NULL) {
2820			++errors;
2821			continue;
2822		}
2823		if (holding) {
2824			if (zfs_hold(zhp, delim+1, tag, recursive,
2825			    temphold, B_FALSE) != 0)
2826				++errors;
2827		} else {
2828			if (zfs_release(zhp, delim+1, tag, recursive) != 0)
2829				++errors;
2830		}
2831		zfs_close(zhp);
2832	}
2833
2834	return (errors != 0);
2835}
2836
2837/*
2838 * zfs hold [-r] [-t] <tag> <snap> ...
2839 *
2840 *	-r	Recursively hold
2841 *	-t	Temporary hold (hidden option)
2842 *
2843 * Apply a user-hold with the given tag to the list of snapshots.
2844 */
2845static int
2846zfs_do_hold(int argc, char **argv)
2847{
2848	return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
2849}
2850
2851/*
2852 * zfs release [-r] <tag> <snap> ...
2853 *
2854 *	-r	Recursively release
2855 *
2856 * Release a user-hold with the given tag from the list of snapshots.
2857 */
2858static int
2859zfs_do_release(int argc, char **argv)
2860{
2861	return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
2862}
2863
2864typedef struct get_all_cbdata {
2865	zfs_handle_t	**cb_handles;
2866	size_t		cb_alloc;
2867	size_t		cb_used;
2868	uint_t		cb_types;
2869	boolean_t	cb_verbose;
2870} get_all_cbdata_t;
2871
2872#define	CHECK_SPINNER 30
2873#define	SPINNER_TIME 3		/* seconds */
2874#define	MOUNT_TIME 5		/* seconds */
2875
2876static int
2877get_one_dataset(zfs_handle_t *zhp, void *data)
2878{
2879	static char spin[] = { '-', '\\', '|', '/' };
2880	static int spinval = 0;
2881	static int spincheck = 0;
2882	static time_t last_spin_time = (time_t)0;
2883	get_all_cbdata_t *cbp = data;
2884	zfs_type_t type = zfs_get_type(zhp);
2885
2886	if (cbp->cb_verbose) {
2887		if (--spincheck < 0) {
2888			time_t now = time(NULL);
2889			if (last_spin_time + SPINNER_TIME < now) {
2890				(void) printf("\b%c", spin[spinval++ % 4]);
2891				(void) fflush(stdout);
2892				last_spin_time = now;
2893			}
2894			spincheck = CHECK_SPINNER;
2895		}
2896	}
2897
2898	/*
2899	 * Interate over any nested datasets.
2900	 */
2901	if (type == ZFS_TYPE_FILESYSTEM &&
2902	    zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2903		zfs_close(zhp);
2904		return (1);
2905	}
2906
2907	/*
2908	 * Skip any datasets whose type does not match.
2909	 */
2910	if ((type & cbp->cb_types) == 0) {
2911		zfs_close(zhp);
2912		return (0);
2913	}
2914
2915	if (cbp->cb_alloc == cbp->cb_used) {
2916		zfs_handle_t **handles;
2917
2918		if (cbp->cb_alloc == 0)
2919			cbp->cb_alloc = 64;
2920		else
2921			cbp->cb_alloc *= 2;
2922
2923		handles = safe_malloc(cbp->cb_alloc * sizeof (void *));
2924
2925		if (cbp->cb_handles) {
2926			bcopy(cbp->cb_handles, handles,
2927			    cbp->cb_used * sizeof (void *));
2928			free(cbp->cb_handles);
2929		}
2930
2931		cbp->cb_handles = handles;
2932	}
2933
2934	cbp->cb_handles[cbp->cb_used++] = zhp;
2935
2936	return (0);
2937}
2938
2939static void
2940get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count,
2941    boolean_t verbose)
2942{
2943	get_all_cbdata_t cb = { 0 };
2944	cb.cb_types = types;
2945	cb.cb_verbose = verbose;
2946
2947	if (verbose) {
2948		(void) printf("%s: *", gettext("Reading ZFS config"));
2949		(void) fflush(stdout);
2950	}
2951
2952	(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
2953
2954	*dslist = cb.cb_handles;
2955	*count = cb.cb_used;
2956
2957	if (verbose) {
2958		(void) printf("\b%s\n", gettext("done."));
2959	}
2960}
2961
2962static int
2963dataset_cmp(const void *a, const void *b)
2964{
2965	zfs_handle_t **za = (zfs_handle_t **)a;
2966	zfs_handle_t **zb = (zfs_handle_t **)b;
2967	char mounta[MAXPATHLEN];
2968	char mountb[MAXPATHLEN];
2969	boolean_t gota, gotb;
2970
2971	if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
2972		verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
2973		    sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
2974	if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
2975		verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
2976		    sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
2977
2978	if (gota && gotb)
2979		return (strcmp(mounta, mountb));
2980
2981	if (gota)
2982		return (-1);
2983	if (gotb)
2984		return (1);
2985
2986	return (strcmp(zfs_get_name(a), zfs_get_name(b)));
2987}
2988
2989/*
2990 * Generic callback for sharing or mounting filesystems.  Because the code is so
2991 * similar, we have a common function with an extra parameter to determine which
2992 * mode we are using.
2993 */
2994#define	OP_SHARE	0x1
2995#define	OP_MOUNT	0x2
2996
2997/*
2998 * Share or mount a dataset.
2999 */
3000static int
3001share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
3002    boolean_t explicit, const char *options)
3003{
3004	char mountpoint[ZFS_MAXPROPLEN];
3005	char shareopts[ZFS_MAXPROPLEN];
3006	char smbshareopts[ZFS_MAXPROPLEN];
3007	const char *cmdname = op == OP_SHARE ? "share" : "mount";
3008	struct mnttab mnt;
3009	uint64_t zoned, canmount;
3010	zfs_type_t type = zfs_get_type(zhp);
3011	boolean_t shared_nfs, shared_smb;
3012
3013	assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME));
3014
3015	if (type == ZFS_TYPE_FILESYSTEM) {
3016		/*
3017		 * Check to make sure we can mount/share this dataset.  If we
3018		 * are in the global zone and the filesystem is exported to a
3019		 * local zone, or if we are in a local zone and the
3020		 * filesystem is not exported, then it is an error.
3021		 */
3022		zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3023
3024		if (zoned && getzoneid() == GLOBAL_ZONEID) {
3025			if (!explicit)
3026				return (0);
3027
3028			(void) fprintf(stderr, gettext("cannot %s '%s': "
3029			    "dataset is exported to a local zone\n"), cmdname,
3030			    zfs_get_name(zhp));
3031			return (1);
3032
3033		} else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
3034			if (!explicit)
3035				return (0);
3036
3037			(void) fprintf(stderr, gettext("cannot %s '%s': "
3038			    "permission denied\n"), cmdname,
3039			    zfs_get_name(zhp));
3040			return (1);
3041		}
3042
3043		/*
3044		 * Ignore any filesystems which don't apply to us. This
3045		 * includes those with a legacy mountpoint, or those with
3046		 * legacy share options.
3047		 */
3048		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3049		    sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
3050		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
3051		    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3052		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
3053		    sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
3054
3055		if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
3056		    strcmp(smbshareopts, "off") == 0) {
3057			if (!explicit)
3058				return (0);
3059
3060			(void) fprintf(stderr, gettext("cannot share '%s': "
3061			    "legacy share\n"), zfs_get_name(zhp));
3062			(void) fprintf(stderr, gettext("use share(1M) to "
3063			    "share this filesystem, or set "
3064			    "sharenfs property on\n"));
3065			return (1);
3066		}
3067
3068		/*
3069		 * We cannot share or mount legacy filesystems. If the
3070		 * shareopts is non-legacy but the mountpoint is legacy, we
3071		 * treat it as a legacy share.
3072		 */
3073		if (strcmp(mountpoint, "legacy") == 0) {
3074			if (!explicit)
3075				return (0);
3076
3077			(void) fprintf(stderr, gettext("cannot %s '%s': "
3078			    "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
3079			(void) fprintf(stderr, gettext("use %s(1M) to "
3080			    "%s this filesystem\n"), cmdname, cmdname);
3081			return (1);
3082		}
3083
3084		if (strcmp(mountpoint, "none") == 0) {
3085			if (!explicit)
3086				return (0);
3087
3088			(void) fprintf(stderr, gettext("cannot %s '%s': no "
3089			    "mountpoint set\n"), cmdname, zfs_get_name(zhp));
3090			return (1);
3091		}
3092
3093		/*
3094		 * canmount	explicit	outcome
3095		 * on		no		pass through
3096		 * on		yes		pass through
3097		 * off		no		return 0
3098		 * off		yes		display error, return 1
3099		 * noauto	no		return 0
3100		 * noauto	yes		pass through
3101		 */
3102		canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
3103		if (canmount == ZFS_CANMOUNT_OFF) {
3104			if (!explicit)
3105				return (0);
3106
3107			(void) fprintf(stderr, gettext("cannot %s '%s': "
3108			    "'canmount' property is set to 'off'\n"), cmdname,
3109			    zfs_get_name(zhp));
3110			return (1);
3111		} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
3112			return (0);
3113		}
3114
3115		/*
3116		 * At this point, we have verified that the mountpoint and/or
3117		 * shareopts are appropriate for auto management. If the
3118		 * filesystem is already mounted or shared, return (failing
3119		 * for explicit requests); otherwise mount or share the
3120		 * filesystem.
3121		 */
3122		switch (op) {
3123		case OP_SHARE:
3124
3125			shared_nfs = zfs_is_shared_nfs(zhp, NULL);
3126			shared_smb = zfs_is_shared_smb(zhp, NULL);
3127
3128			if (shared_nfs && shared_smb ||
3129			    (shared_nfs && strcmp(shareopts, "on") == 0 &&
3130			    strcmp(smbshareopts, "off") == 0) ||
3131			    (shared_smb && strcmp(smbshareopts, "on") == 0 &&
3132			    strcmp(shareopts, "off") == 0)) {
3133				if (!explicit)
3134					return (0);
3135
3136				(void) fprintf(stderr, gettext("cannot share "
3137				    "'%s': filesystem already shared\n"),
3138				    zfs_get_name(zhp));
3139				return (1);
3140			}
3141
3142			if (!zfs_is_mounted(zhp, NULL) &&
3143			    zfs_mount(zhp, NULL, 0) != 0)
3144				return (1);
3145
3146			if (protocol == NULL) {
3147				if (zfs_shareall(zhp) != 0)
3148					return (1);
3149			} else if (strcmp(protocol, "nfs") == 0) {
3150				if (zfs_share_nfs(zhp))
3151					return (1);
3152			} else if (strcmp(protocol, "smb") == 0) {
3153				if (zfs_share_smb(zhp))
3154					return (1);
3155			} else {
3156				(void) fprintf(stderr, gettext("cannot share "
3157				    "'%s': invalid share type '%s' "
3158				    "specified\n"),
3159				    zfs_get_name(zhp), protocol);
3160				return (1);
3161			}
3162
3163			break;
3164
3165		case OP_MOUNT:
3166			if (options == NULL)
3167				mnt.mnt_mntopts = "";
3168			else
3169				mnt.mnt_mntopts = (char *)options;
3170
3171			if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
3172			    zfs_is_mounted(zhp, NULL)) {
3173				if (!explicit)
3174					return (0);
3175
3176				(void) fprintf(stderr, gettext("cannot mount "
3177				    "'%s': filesystem already mounted\n"),
3178				    zfs_get_name(zhp));
3179				return (1);
3180			}
3181
3182			if (zfs_mount(zhp, options, flags) != 0)
3183				return (1);
3184			break;
3185		}
3186	} else {
3187		assert(op == OP_SHARE);
3188
3189		/*
3190		 * Ignore any volumes that aren't shared.
3191		 */
3192		verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
3193		    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3194
3195		if (strcmp(shareopts, "off") == 0) {
3196			if (!explicit)
3197				return (0);
3198
3199			(void) fprintf(stderr, gettext("cannot share '%s': "
3200			    "'shareiscsi' property not set\n"),
3201			    zfs_get_name(zhp));
3202			(void) fprintf(stderr, gettext("set 'shareiscsi' "
3203			    "property or use iscsitadm(1M) to share this "
3204			    "volume\n"));
3205			return (1);
3206		}
3207
3208		if (zfs_is_shared_iscsi(zhp)) {
3209			if (!explicit)
3210				return (0);
3211
3212			(void) fprintf(stderr, gettext("cannot share "
3213			    "'%s': volume already shared\n"),
3214			    zfs_get_name(zhp));
3215			return (1);
3216		}
3217
3218		if (zfs_share_iscsi(zhp) != 0)
3219			return (1);
3220	}
3221
3222	return (0);
3223}
3224
3225/*
3226 * Reports progress in the form "(current/total)".  Not thread-safe.
3227 */
3228static void
3229report_mount_progress(int current, int total)
3230{
3231	static int len;
3232	static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
3233	    "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
3234	static time_t last_progress_time;
3235	time_t now = time(NULL);
3236
3237	/* report 1..n instead of 0..n-1 */
3238	++current;
3239
3240	/* display header if we're here for the first time */
3241	if (current == 1) {
3242		(void) printf(gettext("Mounting ZFS filesystems: "));
3243		len = 0;
3244	} else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3245		/* too soon to report again */
3246		return;
3247	}
3248
3249	last_progress_time = now;
3250
3251	/* back up to prepare for overwriting */
3252	if (len)
3253		(void) printf("%*.*s", len, len, reverse);
3254
3255	/* We put a newline at the end if this is the last one.  */
3256	len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
3257	(void) fflush(stdout);
3258}
3259
3260static void
3261append_options(char *mntopts, char *newopts)
3262{
3263	int len = strlen(mntopts);
3264
3265	/* original length plus new string to append plus 1 for the comma */
3266	if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3267		(void) fprintf(stderr, gettext("the opts argument for "
3268		    "'%c' option is too long (more than %d chars)\n"),
3269		    "-o", MNT_LINE_MAX);
3270		usage(B_FALSE);
3271	}
3272
3273	if (*mntopts)
3274		mntopts[len++] = ',';
3275
3276	(void) strcpy(&mntopts[len], newopts);
3277}
3278
3279static int
3280share_mount(int op, int argc, char **argv)
3281{
3282	int do_all = 0;
3283	boolean_t verbose = B_FALSE;
3284	int c, ret = 0;
3285	char *options = NULL;
3286	int types, flags = 0;
3287
3288	/* check options */
3289	while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3290	    != -1) {
3291		switch (c) {
3292		case 'a':
3293			do_all = 1;
3294			break;
3295		case 'v':
3296			verbose = B_TRUE;
3297			break;
3298		case 'o':
3299			if (*optarg == '\0') {
3300				(void) fprintf(stderr, gettext("empty mount "
3301				    "options (-o) specified\n"));
3302				usage(B_FALSE);
3303			}
3304
3305			if (options == NULL)
3306				options = safe_malloc(MNT_LINE_MAX + 1);
3307
3308			/* option validation is done later */
3309			append_options(options, optarg);
3310			break;
3311
3312		case 'O':
3313			flags |= MS_OVERLAY;
3314			break;
3315		case ':':
3316			(void) fprintf(stderr, gettext("missing argument for "
3317			    "'%c' option\n"), optopt);
3318			usage(B_FALSE);
3319			break;
3320		case '?':
3321			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3322			    optopt);
3323			usage(B_FALSE);
3324		}
3325	}
3326
3327	argc -= optind;
3328	argv += optind;
3329
3330	/* check number of arguments */
3331	if (do_all) {
3332		zfs_handle_t **dslist = NULL;
3333		size_t i, count = 0;
3334		char *protocol = NULL;
3335
3336		if (op == OP_MOUNT) {
3337			types = ZFS_TYPE_FILESYSTEM;
3338		} else if (argc > 0) {
3339			if (strcmp(argv[0], "nfs") == 0 ||
3340			    strcmp(argv[0], "smb") == 0) {
3341				types = ZFS_TYPE_FILESYSTEM;
3342			} else if (strcmp(argv[0], "iscsi") == 0) {
3343				types = ZFS_TYPE_VOLUME;
3344			} else {
3345				(void) fprintf(stderr, gettext("share type "
3346				    "must be 'nfs', 'smb' or 'iscsi'\n"));
3347				usage(B_FALSE);
3348			}
3349			protocol = argv[0];
3350			argc--;
3351			argv++;
3352		} else {
3353			types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3354		}
3355
3356		if (argc != 0) {
3357			(void) fprintf(stderr, gettext("too many arguments\n"));
3358			usage(B_FALSE);
3359		}
3360
3361		get_all_datasets(types, &dslist, &count, verbose);
3362
3363		if (count == 0)
3364			return (0);
3365
3366		qsort(dslist, count, sizeof (void *), dataset_cmp);
3367
3368		for (i = 0; i < count; i++) {
3369			if (verbose)
3370				report_mount_progress(i, count);
3371
3372			if (share_mount_one(dslist[i], op, flags, protocol,
3373			    B_FALSE, options) != 0)
3374				ret = 1;
3375			zfs_close(dslist[i]);
3376		}
3377
3378		free(dslist);
3379	} else if (argc == 0) {
3380		struct mnttab entry;
3381
3382		if ((op == OP_SHARE) || (options != NULL)) {
3383			(void) fprintf(stderr, gettext("missing filesystem "
3384			    "argument (specify -a for all)\n"));
3385			usage(B_FALSE);
3386		}
3387
3388		/*
3389		 * When mount is given no arguments, go through /etc/mnttab and
3390		 * display any active ZFS mounts.  We hide any snapshots, since
3391		 * they are controlled automatically.
3392		 */
3393		rewind(mnttab_file);
3394		while (getmntent(mnttab_file, &entry) == 0) {
3395			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3396			    strchr(entry.mnt_special, '@') != NULL)
3397				continue;
3398
3399			(void) printf("%-30s  %s\n", entry.mnt_special,
3400			    entry.mnt_mountp);
3401		}
3402
3403	} else {
3404		zfs_handle_t *zhp;
3405
3406		types = ZFS_TYPE_FILESYSTEM;
3407		if (op == OP_SHARE)
3408			types |= ZFS_TYPE_VOLUME;
3409
3410		if (argc > 1) {
3411			(void) fprintf(stderr,
3412			    gettext("too many arguments\n"));
3413			usage(B_FALSE);
3414		}
3415
3416		if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) {
3417			ret = 1;
3418		} else {
3419			ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3420			    options);
3421			zfs_close(zhp);
3422		}
3423	}
3424
3425	return (ret);
3426}
3427
3428/*
3429 * zfs mount -a [nfs | iscsi]
3430 * zfs mount filesystem
3431 *
3432 * Mount all filesystems, or mount the given filesystem.
3433 */
3434static int
3435zfs_do_mount(int argc, char **argv)
3436{
3437	return (share_mount(OP_MOUNT, argc, argv));
3438}
3439
3440/*
3441 * zfs share -a [nfs | iscsi | smb]
3442 * zfs share filesystem
3443 *
3444 * Share all filesystems, or share the given filesystem.
3445 */
3446static int
3447zfs_do_share(int argc, char **argv)
3448{
3449	return (share_mount(OP_SHARE, argc, argv));
3450}
3451
3452typedef struct unshare_unmount_node {
3453	zfs_handle_t	*un_zhp;
3454	char		*un_mountp;
3455	uu_avl_node_t	un_avlnode;
3456} unshare_unmount_node_t;
3457
3458/* ARGSUSED */
3459static int
3460unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3461{
3462	const unshare_unmount_node_t *l = larg;
3463	const unshare_unmount_node_t *r = rarg;
3464
3465	return (strcmp(l->un_mountp, r->un_mountp));
3466}
3467
3468/*
3469 * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3470 * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3471 * and unmount it appropriately.
3472 */
3473static int
3474unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3475{
3476	zfs_handle_t *zhp;
3477	int ret;
3478	struct stat64 statbuf;
3479	struct extmnttab entry;
3480	const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3481	ino_t path_inode;
3482
3483	/*
3484	 * Search for the path in /etc/mnttab.  Rather than looking for the
3485	 * specific path, which can be fooled by non-standard paths (i.e. ".."
3486	 * or "//"), we stat() the path and search for the corresponding
3487	 * (major,minor) device pair.
3488	 */
3489	if (stat64(path, &statbuf) != 0) {
3490		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3491		    cmdname, path, strerror(errno));
3492		return (1);
3493	}
3494	path_inode = statbuf.st_ino;
3495
3496	/*
3497	 * Search for the given (major,minor) pair in the mount table.
3498	 */
3499	rewind(mnttab_file);
3500	while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3501		if (entry.mnt_major == major(statbuf.st_dev) &&
3502		    entry.mnt_minor == minor(statbuf.st_dev))
3503			break;
3504	}
3505	if (ret != 0) {
3506		if (op == OP_SHARE) {
3507			(void) fprintf(stderr, gettext("cannot %s '%s': not "
3508			    "currently mounted\n"), cmdname, path);
3509			return (1);
3510		}
3511		(void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3512		    path);
3513		if ((ret = umount2(path, flags)) != 0)
3514			(void) fprintf(stderr, gettext("%s: %s\n"), path,
3515			    strerror(errno));
3516		return (ret != 0);
3517	}
3518
3519	if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3520		(void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3521		    "filesystem\n"), cmdname, path);
3522		return (1);
3523	}
3524
3525	if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3526	    ZFS_TYPE_FILESYSTEM)) == NULL)
3527		return (1);
3528
3529	ret = 1;
3530	if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3531		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3532		    cmdname, path, strerror(errno));
3533		goto out;
3534	} else if (statbuf.st_ino != path_inode) {
3535		(void) fprintf(stderr, gettext("cannot "
3536		    "%s '%s': not a mountpoint\n"), cmdname, path);
3537		goto out;
3538	}
3539
3540	if (op == OP_SHARE) {
3541		char nfs_mnt_prop[ZFS_MAXPROPLEN];
3542		char smbshare_prop[ZFS_MAXPROPLEN];
3543
3544		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3545		    sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3546		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3547		    sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3548
3549		if (strcmp(nfs_mnt_prop, "off") == 0 &&
3550		    strcmp(smbshare_prop, "off") == 0) {
3551			(void) fprintf(stderr, gettext("cannot unshare "
3552			    "'%s': legacy share\n"), path);
3553			(void) fprintf(stderr, gettext("use "
3554			    "unshare(1M) to unshare this filesystem\n"));
3555		} else if (!zfs_is_shared(zhp)) {
3556			(void) fprintf(stderr, gettext("cannot unshare '%s': "
3557			    "not currently shared\n"), path);
3558		} else {
3559			ret = zfs_unshareall_bypath(zhp, path);
3560		}
3561	} else {
3562		char mtpt_prop[ZFS_MAXPROPLEN];
3563
3564		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3565		    sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3566
3567		if (is_manual) {
3568			ret = zfs_unmount(zhp, NULL, flags);
3569		} else if (strcmp(mtpt_prop, "legacy") == 0) {
3570			(void) fprintf(stderr, gettext("cannot unmount "
3571			    "'%s': legacy mountpoint\n"),
3572			    zfs_get_name(zhp));
3573			(void) fprintf(stderr, gettext("use umount(1M) "
3574			    "to unmount this filesystem\n"));
3575		} else {
3576			ret = zfs_unmountall(zhp, flags);
3577		}
3578	}
3579
3580out:
3581	zfs_close(zhp);
3582
3583	return (ret != 0);
3584}
3585
3586/*
3587 * Generic callback for unsharing or unmounting a filesystem.
3588 */
3589static int
3590unshare_unmount(int op, int argc, char **argv)
3591{
3592	int do_all = 0;
3593	int flags = 0;
3594	int ret = 0;
3595	int types, c;
3596	zfs_handle_t *zhp;
3597	char nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
3598	char sharesmb[ZFS_MAXPROPLEN];
3599
3600	/* check options */
3601	while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3602		switch (c) {
3603		case 'a':
3604			do_all = 1;
3605			break;
3606		case 'f':
3607			flags = MS_FORCE;
3608			break;
3609		case '?':
3610			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3611			    optopt);
3612			usage(B_FALSE);
3613		}
3614	}
3615
3616	argc -= optind;
3617	argv += optind;
3618
3619	if (do_all) {
3620		/*
3621		 * We could make use of zfs_for_each() to walk all datasets in
3622		 * the system, but this would be very inefficient, especially
3623		 * since we would have to linearly search /etc/mnttab for each
3624		 * one.  Instead, do one pass through /etc/mnttab looking for
3625		 * zfs entries and call zfs_unmount() for each one.
3626		 *
3627		 * Things get a little tricky if the administrator has created
3628		 * mountpoints beneath other ZFS filesystems.  In this case, we
3629		 * have to unmount the deepest filesystems first.  To accomplish
3630		 * this, we place all the mountpoints in an AVL tree sorted by
3631		 * the special type (dataset name), and walk the result in
3632		 * reverse to make sure to get any snapshots first.
3633		 */
3634		struct mnttab entry;
3635		uu_avl_pool_t *pool;
3636		uu_avl_t *tree;
3637		unshare_unmount_node_t *node;
3638		uu_avl_index_t idx;
3639		uu_avl_walk_t *walk;
3640
3641		if (argc != 0) {
3642			(void) fprintf(stderr, gettext("too many arguments\n"));
3643			usage(B_FALSE);
3644		}
3645
3646		if ((pool = uu_avl_pool_create("unmount_pool",
3647		    sizeof (unshare_unmount_node_t),
3648		    offsetof(unshare_unmount_node_t, un_avlnode),
3649		    unshare_unmount_compare,
3650		    UU_DEFAULT)) == NULL) {
3651			(void) fprintf(stderr, gettext("internal error: "
3652			    "out of memory\n"));
3653			exit(1);
3654		}
3655
3656		if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) {
3657			(void) fprintf(stderr, gettext("internal error: "
3658			    "out of memory\n"));
3659			exit(1);
3660		}
3661
3662		rewind(mnttab_file);
3663		while (getmntent(mnttab_file, &entry) == 0) {
3664
3665			/* ignore non-ZFS entries */
3666			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3667				continue;
3668
3669			/* ignore snapshots */
3670			if (strchr(entry.mnt_special, '@') != NULL)
3671				continue;
3672
3673			if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3674			    ZFS_TYPE_FILESYSTEM)) == NULL) {
3675				ret = 1;
3676				continue;
3677			}
3678
3679			switch (op) {
3680			case OP_SHARE:
3681				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3682				    nfsiscsi_mnt_prop,
3683				    sizeof (nfsiscsi_mnt_prop),
3684				    NULL, NULL, 0, B_FALSE) == 0);
3685				if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
3686					break;
3687				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3688				    nfsiscsi_mnt_prop,
3689				    sizeof (nfsiscsi_mnt_prop),
3690				    NULL, NULL, 0, B_FALSE) == 0);
3691				if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
3692					continue;
3693				break;
3694			case OP_MOUNT:
3695				/* Ignore legacy mounts */
3696				verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3697				    nfsiscsi_mnt_prop,
3698				    sizeof (nfsiscsi_mnt_prop),
3699				    NULL, NULL, 0, B_FALSE) == 0);
3700				if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
3701					continue;
3702				/* Ignore canmount=noauto mounts */
3703				if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3704				    ZFS_CANMOUNT_NOAUTO)
3705					continue;
3706			default:
3707				break;
3708			}
3709
3710			node = safe_malloc(sizeof (unshare_unmount_node_t));
3711			node->un_zhp = zhp;
3712
3713			if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
3714			    NULL) {
3715				(void) fprintf(stderr, gettext("internal error:"
3716				    " out of memory\n"));
3717				exit(1);
3718			}
3719
3720			uu_avl_node_init(node, &node->un_avlnode, pool);
3721
3722			if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3723				uu_avl_insert(tree, node, idx);
3724			} else {
3725				zfs_close(node->un_zhp);
3726				free(node->un_mountp);
3727				free(node);
3728			}
3729		}
3730
3731		/*
3732		 * Walk the AVL tree in reverse, unmounting each filesystem and
3733		 * removing it from the AVL tree in the process.
3734		 */
3735		if ((walk = uu_avl_walk_start(tree,
3736		    UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) {
3737			(void) fprintf(stderr,
3738			    gettext("internal error: out of memory"));
3739			exit(1);
3740		}
3741
3742		while ((node = uu_avl_walk_next(walk)) != NULL) {
3743			uu_avl_remove(tree, node);
3744
3745			switch (op) {
3746			case OP_SHARE:
3747				if (zfs_unshareall_bypath(node->un_zhp,
3748				    node->un_mountp) != 0)
3749					ret = 1;
3750				break;
3751
3752			case OP_MOUNT:
3753				if (zfs_unmount(node->un_zhp,
3754				    node->un_mountp, flags) != 0)
3755					ret = 1;
3756				break;
3757			}
3758
3759			zfs_close(node->un_zhp);
3760			free(node->un_mountp);
3761			free(node);
3762		}
3763
3764		uu_avl_walk_end(walk);
3765		uu_avl_destroy(tree);
3766		uu_avl_pool_destroy(pool);
3767
3768		if (op == OP_SHARE) {
3769			/*
3770			 * Finally, unshare any volumes shared via iSCSI.
3771			 */
3772			zfs_handle_t **dslist = NULL;
3773			size_t i, count = 0;
3774
3775			get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count,
3776			    B_FALSE);
3777
3778			if (count != 0) {
3779				qsort(dslist, count, sizeof (void *),
3780				    dataset_cmp);
3781
3782				for (i = 0; i < count; i++) {
3783					if (zfs_unshare_iscsi(dslist[i]) != 0)
3784						ret = 1;
3785					zfs_close(dslist[i]);
3786				}
3787
3788				free(dslist);
3789			}
3790		}
3791	} else {
3792		if (argc != 1) {
3793			if (argc == 0)
3794				(void) fprintf(stderr,
3795				    gettext("missing filesystem argument\n"));
3796			else
3797				(void) fprintf(stderr,
3798				    gettext("too many arguments\n"));
3799			usage(B_FALSE);
3800		}
3801
3802		/*
3803		 * We have an argument, but it may be a full path or a ZFS
3804		 * filesystem.  Pass full paths off to unmount_path() (shared by
3805		 * manual_unmount), otherwise open the filesystem and pass to
3806		 * zfs_unmount().
3807		 */
3808		if (argv[0][0] == '/')
3809			return (unshare_unmount_path(op, argv[0],
3810			    flags, B_FALSE));
3811
3812		types = ZFS_TYPE_FILESYSTEM;
3813		if (op == OP_SHARE)
3814			types |= ZFS_TYPE_VOLUME;
3815
3816		if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3817			return (1);
3818
3819		if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
3820			verify(zfs_prop_get(zhp, op == OP_SHARE ?
3821			    ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3822			    nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
3823			    NULL, 0, B_FALSE) == 0);
3824
3825			switch (op) {
3826			case OP_SHARE:
3827				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3828				    nfsiscsi_mnt_prop,
3829				    sizeof (nfsiscsi_mnt_prop),
3830				    NULL, NULL, 0, B_FALSE) == 0);
3831				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3832				    sharesmb, sizeof (sharesmb), NULL, NULL,
3833				    0, B_FALSE) == 0);
3834
3835				if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
3836				    strcmp(sharesmb, "off") == 0) {
3837					(void) fprintf(stderr, gettext("cannot "
3838					    "unshare '%s': legacy share\n"),
3839					    zfs_get_name(zhp));
3840					(void) fprintf(stderr, gettext("use "
3841					    "unshare(1M) to unshare this "
3842					    "filesystem\n"));
3843					ret = 1;
3844				} else if (!zfs_is_shared(zhp)) {
3845					(void) fprintf(stderr, gettext("cannot "
3846					    "unshare '%s': not currently "
3847					    "shared\n"), zfs_get_name(zhp));
3848					ret = 1;
3849				} else if (zfs_unshareall(zhp) != 0) {
3850					ret = 1;
3851				}
3852				break;
3853
3854			case OP_MOUNT:
3855				if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0) {
3856					(void) fprintf(stderr, gettext("cannot "
3857					    "unmount '%s': legacy "
3858					    "mountpoint\n"), zfs_get_name(zhp));
3859					(void) fprintf(stderr, gettext("use "
3860					    "umount(1M) to unmount this "
3861					    "filesystem\n"));
3862					ret = 1;
3863				} else if (!zfs_is_mounted(zhp, NULL)) {
3864					(void) fprintf(stderr, gettext("cannot "
3865					    "unmount '%s': not currently "
3866					    "mounted\n"),
3867					    zfs_get_name(zhp));
3868					ret = 1;
3869				} else if (zfs_unmountall(zhp, flags) != 0) {
3870					ret = 1;
3871				}
3872				break;
3873			}
3874		} else {
3875			assert(op == OP_SHARE);
3876
3877			verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI,
3878			    nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
3879			    NULL, NULL, 0, B_FALSE) == 0);
3880
3881			if (strcmp(nfsiscsi_mnt_prop, "off") == 0) {
3882				(void) fprintf(stderr, gettext("cannot unshare "
3883				    "'%s': 'shareiscsi' property not set\n"),
3884				    zfs_get_name(zhp));
3885				(void) fprintf(stderr, gettext("set "
3886				    "'shareiscsi' property or use "
3887				    "iscsitadm(1M) to share this volume\n"));
3888				ret = 1;
3889			} else if (!zfs_is_shared_iscsi(zhp)) {
3890				(void) fprintf(stderr, gettext("cannot "
3891				    "unshare '%s': not currently shared\n"),
3892				    zfs_get_name(zhp));
3893				ret = 1;
3894			} else if (zfs_unshare_iscsi(zhp) != 0) {
3895				ret = 1;
3896			}
3897		}
3898
3899		zfs_close(zhp);
3900	}
3901
3902	return (ret);
3903}
3904
3905/*
3906 * zfs unmount -a
3907 * zfs unmount filesystem
3908 *
3909 * Unmount all filesystems, or a specific ZFS filesystem.
3910 */
3911static int
3912zfs_do_unmount(int argc, char **argv)
3913{
3914	return (unshare_unmount(OP_MOUNT, argc, argv));
3915}
3916
3917/*
3918 * zfs unshare -a
3919 * zfs unshare filesystem
3920 *
3921 * Unshare all filesystems, or a specific ZFS filesystem.
3922 */
3923static int
3924zfs_do_unshare(int argc, char **argv)
3925{
3926	return (unshare_unmount(OP_SHARE, argc, argv));
3927}
3928
3929/* ARGSUSED */
3930static int
3931zfs_do_python(int argc, char **argv)
3932{
3933	(void) execv(pypath, argv-1);
3934	(void) printf("internal error: %s not found\n", pypath);
3935	return (-1);
3936}
3937
3938/*
3939 * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3940 * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3941 */
3942static int
3943manual_mount(int argc, char **argv)
3944{
3945	zfs_handle_t *zhp;
3946	char mountpoint[ZFS_MAXPROPLEN];
3947	char mntopts[MNT_LINE_MAX] = { '\0' };
3948	int ret;
3949	int c;
3950	int flags = 0;
3951	char *dataset, *path;
3952
3953	/* check options */
3954	while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3955		switch (c) {
3956		case 'o':
3957			(void) strlcpy(mntopts, optarg, sizeof (mntopts));
3958			break;
3959		case 'O':
3960			flags |= MS_OVERLAY;
3961			break;
3962		case 'm':
3963			flags |= MS_NOMNTTAB;
3964			break;
3965		case ':':
3966			(void) fprintf(stderr, gettext("missing argument for "
3967			    "'%c' option\n"), optopt);
3968			usage(B_FALSE);
3969			break;
3970		case '?':
3971			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3972			    optopt);
3973			(void) fprintf(stderr, gettext("usage: mount [-o opts] "
3974			    "<path>\n"));
3975			return (2);
3976		}
3977	}
3978
3979	argc -= optind;
3980	argv += optind;
3981
3982	/* check that we only have two arguments */
3983	if (argc != 2) {
3984		if (argc == 0)
3985			(void) fprintf(stderr, gettext("missing dataset "
3986			    "argument\n"));
3987		else if (argc == 1)
3988			(void) fprintf(stderr,
3989			    gettext("missing mountpoint argument\n"));
3990		else
3991			(void) fprintf(stderr, gettext("too many arguments\n"));
3992		(void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
3993		return (2);
3994	}
3995
3996	dataset = argv[0];
3997	path = argv[1];
3998
3999	/* try to open the dataset */
4000	if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
4001		return (1);
4002
4003	(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
4004	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
4005
4006	/* check for legacy mountpoint and complain appropriately */
4007	ret = 0;
4008	if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
4009		if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
4010		    NULL, 0, mntopts, sizeof (mntopts)) != 0) {
4011			(void) fprintf(stderr, gettext("mount failed: %s\n"),
4012			    strerror(errno));
4013			ret = 1;
4014		}
4015	} else {
4016		(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
4017		    "mounted using 'mount -F zfs'\n"), dataset);
4018		(void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
4019		    "instead.\n"), path);
4020		(void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
4021		    "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
4022		(void) fprintf(stderr, gettext("See zfs(1M) for more "
4023		    "information.\n"));
4024		ret = 1;
4025	}
4026
4027	return (ret);
4028}
4029
4030/*
4031 * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
4032 * unmounts of non-legacy filesystems, as this is the dominant administrative
4033 * interface.
4034 */
4035static int
4036manual_unmount(int argc, char **argv)
4037{
4038	int flags = 0;
4039	int c;
4040
4041	/* check options */
4042	while ((c = getopt(argc, argv, "f")) != -1) {
4043		switch (c) {
4044		case 'f':
4045			flags = MS_FORCE;
4046			break;
4047		case '?':
4048			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
4049			    optopt);
4050			(void) fprintf(stderr, gettext("usage: unmount [-f] "
4051			    "<path>\n"));
4052			return (2);
4053		}
4054	}
4055
4056	argc -= optind;
4057	argv += optind;
4058
4059	/* check arguments */
4060	if (argc != 1) {
4061		if (argc == 0)
4062			(void) fprintf(stderr, gettext("missing path "
4063			    "argument\n"));
4064		else
4065			(void) fprintf(stderr, gettext("too many arguments\n"));
4066		(void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
4067		return (2);
4068	}
4069
4070	return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
4071}
4072
4073static int
4074find_command_idx(char *command, int *idx)
4075{
4076	int i;
4077
4078	for (i = 0; i < NCOMMAND; i++) {
4079		if (command_table[i].name == NULL)
4080			continue;
4081
4082		if (strcmp(command, command_table[i].name) == 0) {
4083			*idx = i;
4084			return (0);
4085		}
4086	}
4087	return (1);
4088}
4089
4090int
4091main(int argc, char **argv)
4092{
4093	int ret;
4094	int i;
4095	char *progname;
4096	char *cmdname;
4097
4098	(void) setlocale(LC_ALL, "");
4099	(void) textdomain(TEXT_DOMAIN);
4100
4101	opterr = 0;
4102
4103	if ((g_zfs = libzfs_init()) == NULL) {
4104		(void) fprintf(stderr, gettext("internal error: failed to "
4105		    "initialize ZFS library\n"));
4106		return (1);
4107	}
4108
4109	zpool_set_history_str("zfs", argc, argv, history_str);
4110	verify(zpool_stage_history(g_zfs, history_str) == 0);
4111
4112	libzfs_print_on_error(g_zfs, B_TRUE);
4113
4114	if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
4115		(void) fprintf(stderr, gettext("internal error: unable to "
4116		    "open %s\n"), MNTTAB);
4117		return (1);
4118	}
4119
4120	/*
4121	 * This command also doubles as the /etc/fs mount and unmount program.
4122	 * Determine if we should take this behavior based on argv[0].
4123	 */
4124	progname = basename(argv[0]);
4125	if (strcmp(progname, "mount") == 0) {
4126		ret = manual_mount(argc, argv);
4127	} else if (strcmp(progname, "umount") == 0) {
4128		ret = manual_unmount(argc, argv);
4129	} else {
4130		/*
4131		 * Make sure the user has specified some command.
4132		 */
4133		if (argc < 2) {
4134			(void) fprintf(stderr, gettext("missing command\n"));
4135			usage(B_FALSE);
4136		}
4137
4138		cmdname = argv[1];
4139
4140		/*
4141		 * The 'umount' command is an alias for 'unmount'
4142		 */
4143		if (strcmp(cmdname, "umount") == 0)
4144			cmdname = "unmount";
4145
4146		/*
4147		 * The 'recv' command is an alias for 'receive'
4148		 */
4149		if (strcmp(cmdname, "recv") == 0)
4150			cmdname = "receive";
4151
4152		/*
4153		 * Special case '-?'
4154		 */
4155		if (strcmp(cmdname, "-?") == 0)
4156			usage(B_TRUE);
4157
4158		/*
4159		 * Run the appropriate command.
4160		 */
4161		libzfs_mnttab_cache(g_zfs, B_TRUE);
4162		if (find_command_idx(cmdname, &i) == 0) {
4163			current_command = &command_table[i];
4164			ret = command_table[i].func(argc - 1, argv + 1);
4165		} else if (strchr(cmdname, '=') != NULL) {
4166			verify(find_command_idx("set", &i) == 0);
4167			current_command = &command_table[i];
4168			ret = command_table[i].func(argc, argv);
4169		} else {
4170			(void) fprintf(stderr, gettext("unrecognized "
4171			    "command '%s'\n"), cmdname);
4172			usage(B_FALSE);
4173		}
4174		libzfs_mnttab_cache(g_zfs, B_FALSE);
4175	}
4176
4177	(void) fclose(mnttab_file);
4178
4179	libzfs_fini(g_zfs);
4180
4181	/*
4182	 * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4183	 * for the purposes of running ::findleaks.
4184	 */
4185	if (getenv("ZFS_ABORT") != NULL) {
4186		(void) printf("dumping core by request\n");
4187		abort();
4188	}
4189
4190	return (ret);
4191}
4192