xref: /titanic_50/usr/src/cmd/zfs/zfs_main.c (revision 1dd9d86fd9aec8ba356c4fff43d5a8ebf5bfcaa1)
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 2009 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 
57 libzfs_handle_t *g_zfs;
58 
59 static FILE *mnttab_file;
60 static char history_str[HIS_MAX_RECORD_LEN];
61 const char *pypath = "/usr/lib/zfs/pyzfs.py";
62 
63 static int zfs_do_clone(int argc, char **argv);
64 static int zfs_do_create(int argc, char **argv);
65 static int zfs_do_destroy(int argc, char **argv);
66 static int zfs_do_get(int argc, char **argv);
67 static int zfs_do_inherit(int argc, char **argv);
68 static int zfs_do_list(int argc, char **argv);
69 static int zfs_do_mount(int argc, char **argv);
70 static int zfs_do_rename(int argc, char **argv);
71 static int zfs_do_rollback(int argc, char **argv);
72 static int zfs_do_set(int argc, char **argv);
73 static int zfs_do_upgrade(int argc, char **argv);
74 static int zfs_do_snapshot(int argc, char **argv);
75 static int zfs_do_unmount(int argc, char **argv);
76 static int zfs_do_share(int argc, char **argv);
77 static int zfs_do_unshare(int argc, char **argv);
78 static int zfs_do_send(int argc, char **argv);
79 static int zfs_do_receive(int argc, char **argv);
80 static int zfs_do_promote(int argc, char **argv);
81 static int zfs_do_userspace(int argc, char **argv);
82 static int zfs_do_python(int argc, char **argv);
83 
84 /*
85  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
86  */
87 
88 #ifdef DEBUG
89 const char *
90 _umem_debug_init(void)
91 {
92 	return ("default,verbose"); /* $UMEM_DEBUG setting */
93 }
94 
95 const char *
96 _umem_logging_init(void)
97 {
98 	return ("fail,contents"); /* $UMEM_LOGGING setting */
99 }
100 #endif
101 
102 typedef enum {
103 	HELP_CLONE,
104 	HELP_CREATE,
105 	HELP_DESTROY,
106 	HELP_GET,
107 	HELP_INHERIT,
108 	HELP_UPGRADE,
109 	HELP_LIST,
110 	HELP_MOUNT,
111 	HELP_PROMOTE,
112 	HELP_RECEIVE,
113 	HELP_RENAME,
114 	HELP_ROLLBACK,
115 	HELP_SEND,
116 	HELP_SET,
117 	HELP_SHARE,
118 	HELP_SNAPSHOT,
119 	HELP_UNMOUNT,
120 	HELP_UNSHARE,
121 	HELP_ALLOW,
122 	HELP_UNALLOW,
123 	HELP_USERSPACE,
124 	HELP_GROUPSPACE
125 } zfs_help_t;
126 
127 typedef struct zfs_command {
128 	const char	*name;
129 	int		(*func)(int argc, char **argv);
130 	zfs_help_t	usage;
131 } zfs_command_t;
132 
133 /*
134  * Master command table.  Each ZFS command has a name, associated function, and
135  * usage message.  The usage messages need to be internationalized, so we have
136  * to have a function to return the usage message based on a command index.
137  *
138  * These commands are organized according to how they are displayed in the usage
139  * message.  An empty command (one with a NULL name) indicates an empty line in
140  * the generic usage message.
141  */
142 static zfs_command_t command_table[] = {
143 	{ "create",	zfs_do_create,		HELP_CREATE		},
144 	{ "destroy",	zfs_do_destroy,		HELP_DESTROY		},
145 	{ NULL },
146 	{ "snapshot",	zfs_do_snapshot,	HELP_SNAPSHOT		},
147 	{ "rollback",	zfs_do_rollback,	HELP_ROLLBACK		},
148 	{ "clone",	zfs_do_clone,		HELP_CLONE		},
149 	{ "promote",	zfs_do_promote,		HELP_PROMOTE		},
150 	{ "rename",	zfs_do_rename,		HELP_RENAME		},
151 	{ NULL },
152 	{ "list",	zfs_do_list,		HELP_LIST		},
153 	{ NULL },
154 	{ "set",	zfs_do_set,		HELP_SET		},
155 	{ "get", 	zfs_do_get,		HELP_GET		},
156 	{ "inherit",	zfs_do_inherit,		HELP_INHERIT		},
157 	{ "upgrade",	zfs_do_upgrade,		HELP_UPGRADE		},
158 	{ "userspace",	zfs_do_userspace,	HELP_USERSPACE		},
159 	{ "groupspace",	zfs_do_userspace,	HELP_GROUPSPACE		},
160 	{ NULL },
161 	{ "mount",	zfs_do_mount,		HELP_MOUNT		},
162 	{ "unmount",	zfs_do_unmount,		HELP_UNMOUNT		},
163 	{ "share",	zfs_do_share,		HELP_SHARE		},
164 	{ "unshare",	zfs_do_unshare,		HELP_UNSHARE		},
165 	{ NULL },
166 	{ "send",	zfs_do_send,		HELP_SEND		},
167 	{ "receive",	zfs_do_receive,		HELP_RECEIVE		},
168 	{ NULL },
169 	{ "allow",	zfs_do_python,		HELP_ALLOW		},
170 	{ NULL },
171 	{ "unallow",	zfs_do_python,		HELP_UNALLOW		},
172 };
173 
174 #define	NCOMMAND	(sizeof (command_table) / sizeof (command_table[0]))
175 
176 zfs_command_t *current_command;
177 
178 static const char *
179 get_usage(zfs_help_t idx)
180 {
181 	switch (idx) {
182 	case HELP_CLONE:
183 		return (gettext("\tclone [-p] [-o property=value] ... "
184 		    "<snapshot> <filesystem|volume>\n"));
185 	case HELP_CREATE:
186 		return (gettext("\tcreate [-p] [-o property=value] ... "
187 		    "<filesystem>\n"
188 		    "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
189 		    "-V <size> <volume>\n"));
190 	case HELP_DESTROY:
191 		return (gettext("\tdestroy [-rRf] "
192 		    "<filesystem|volume|snapshot>\n"));
193 	case HELP_GET:
194 		return (gettext("\tget [-rHp] [-d max] "
195 		    "[-o field[,...]] [-s source[,...]]\n"
196 		    "\t    <\"all\" | property[,...]> "
197 		    "[filesystem|volume|snapshot] ...\n"));
198 	case HELP_INHERIT:
199 		return (gettext("\tinherit [-r] <property> "
200 		    "<filesystem|volume|snapshot> ...\n"));
201 	case HELP_UPGRADE:
202 		return (gettext("\tupgrade [-v]\n"
203 		    "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
204 	case HELP_LIST:
205 		return (gettext("\tlist [-rH][-d max] "
206 		    "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
207 		    "\t    [-S property] ... "
208 		    "[filesystem|volume|snapshot] ...\n"));
209 	case HELP_MOUNT:
210 		return (gettext("\tmount\n"
211 		    "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
212 	case HELP_PROMOTE:
213 		return (gettext("\tpromote <clone-filesystem>\n"));
214 	case HELP_RECEIVE:
215 		return (gettext("\treceive [-vnF] <filesystem|volume|"
216 		"snapshot>\n"
217 		"\treceive [-vnF] -d <filesystem>\n"));
218 	case HELP_RENAME:
219 		return (gettext("\trename <filesystem|volume|snapshot> "
220 		    "<filesystem|volume|snapshot>\n"
221 		    "\trename -p <filesystem|volume> <filesystem|volume>\n"
222 		    "\trename -r <snapshot> <snapshot>"));
223 	case HELP_ROLLBACK:
224 		return (gettext("\trollback [-rRf] <snapshot>\n"));
225 	case HELP_SEND:
226 		return (gettext("\tsend [-R] [-[iI] snapshot] <snapshot>\n"));
227 	case HELP_SET:
228 		return (gettext("\tset <property=value> "
229 		    "<filesystem|volume|snapshot> ...\n"));
230 	case HELP_SHARE:
231 		return (gettext("\tshare <-a | filesystem>\n"));
232 	case HELP_SNAPSHOT:
233 		return (gettext("\tsnapshot [-r] [-o property=value] ... "
234 		    "<filesystem@snapname|volume@snapname>\n"));
235 	case HELP_UNMOUNT:
236 		return (gettext("\tunmount [-f] "
237 		    "<-a | filesystem|mountpoint>\n"));
238 	case HELP_UNSHARE:
239 		return (gettext("\tunshare [-f] "
240 		    "<-a | filesystem|mountpoint>\n"));
241 	case HELP_ALLOW:
242 		return (gettext("\tallow <filesystem|volume>\n"
243 		    "\tallow [-ldug] "
244 		    "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
245 		    "\t    <filesystem|volume>\n"
246 		    "\tallow [-ld] -e <perm|@setname>[,...] "
247 		    "<filesystem|volume>\n"
248 		    "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
249 		    "\tallow -s @setname <perm|@setname>[,...] "
250 		    "<filesystem|volume>\n"));
251 	case HELP_UNALLOW:
252 		return (gettext("\tunallow [-rldug] "
253 		    "<\"everyone\"|user|group>[,...]\n"
254 		    "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
255 		    "\tunallow [-rld] -e [<perm|@setname>[,...]] "
256 		    "<filesystem|volume>\n"
257 		    "\tunallow [-r] -c [<perm|@setname>[,...]] "
258 		    "<filesystem|volume>\n"
259 		    "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
260 		    "<filesystem|volume>\n"));
261 	case HELP_USERSPACE:
262 		return (gettext("\tuserspace [-hniHp] [-o field[,...]] "
263 		    "[-sS field] ... [-t type[,...]]\n"
264 		    "\t    <filesystem|snapshot>\n"));
265 	case HELP_GROUPSPACE:
266 		return (gettext("\tgroupspace [-hniHpU] [-o field[,...]] "
267 		    "[-sS field] ... [-t type[,...]]\n"
268 		    "\t    <filesystem|snapshot>\n"));
269 	}
270 
271 	abort();
272 	/* NOTREACHED */
273 }
274 
275 /*
276  * Utility function to guarantee malloc() success.
277  */
278 void *
279 safe_malloc(size_t size)
280 {
281 	void *data;
282 
283 	if ((data = calloc(1, size)) == NULL) {
284 		(void) fprintf(stderr, "internal error: out of memory\n");
285 		exit(1);
286 	}
287 
288 	return (data);
289 }
290 
291 /*
292  * Callback routine that will print out information for each of
293  * the properties.
294  */
295 static int
296 usage_prop_cb(int prop, void *cb)
297 {
298 	FILE *fp = cb;
299 
300 	(void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
301 
302 	if (zfs_prop_readonly(prop))
303 		(void) fprintf(fp, " NO    ");
304 	else
305 		(void) fprintf(fp, "YES    ");
306 
307 	if (zfs_prop_inheritable(prop))
308 		(void) fprintf(fp, "  YES   ");
309 	else
310 		(void) fprintf(fp, "   NO   ");
311 
312 	if (zfs_prop_values(prop) == NULL)
313 		(void) fprintf(fp, "-\n");
314 	else
315 		(void) fprintf(fp, "%s\n", zfs_prop_values(prop));
316 
317 	return (ZPROP_CONT);
318 }
319 
320 /*
321  * Display usage message.  If we're inside a command, display only the usage for
322  * that command.  Otherwise, iterate over the entire command table and display
323  * a complete usage message.
324  */
325 static void
326 usage(boolean_t requested)
327 {
328 	int i;
329 	boolean_t show_properties = B_FALSE;
330 	FILE *fp = requested ? stdout : stderr;
331 
332 	if (current_command == NULL) {
333 
334 		(void) fprintf(fp, gettext("usage: zfs command args ...\n"));
335 		(void) fprintf(fp,
336 		    gettext("where 'command' is one of the following:\n\n"));
337 
338 		for (i = 0; i < NCOMMAND; i++) {
339 			if (command_table[i].name == NULL)
340 				(void) fprintf(fp, "\n");
341 			else
342 				(void) fprintf(fp, "%s",
343 				    get_usage(command_table[i].usage));
344 		}
345 
346 		(void) fprintf(fp, gettext("\nEach dataset is of the form: "
347 		    "pool/[dataset/]*dataset[@name]\n"));
348 	} else {
349 		(void) fprintf(fp, gettext("usage:\n"));
350 		(void) fprintf(fp, "%s", get_usage(current_command->usage));
351 	}
352 
353 	if (current_command != NULL &&
354 	    (strcmp(current_command->name, "set") == 0 ||
355 	    strcmp(current_command->name, "get") == 0 ||
356 	    strcmp(current_command->name, "inherit") == 0 ||
357 	    strcmp(current_command->name, "list") == 0))
358 		show_properties = B_TRUE;
359 
360 	if (show_properties) {
361 		(void) fprintf(fp,
362 		    gettext("\nThe following properties are supported:\n"));
363 
364 		(void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
365 		    "PROPERTY", "EDIT", "INHERIT", "VALUES");
366 
367 		/* Iterate over all properties */
368 		(void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
369 		    ZFS_TYPE_DATASET);
370 
371 		(void) fprintf(fp, "\t%-15s ", "userused@...");
372 		(void) fprintf(fp, " NO       NO   <size>\n");
373 		(void) fprintf(fp, "\t%-15s ", "groupused@...");
374 		(void) fprintf(fp, " NO       NO   <size>\n");
375 		(void) fprintf(fp, "\t%-15s ", "userquota@...");
376 		(void) fprintf(fp, "YES       NO   <size> | none\n");
377 		(void) fprintf(fp, "\t%-15s ", "groupquota@...");
378 		(void) fprintf(fp, "YES       NO   <size> | none\n");
379 
380 		(void) fprintf(fp, gettext("\nSizes are specified in bytes "
381 		    "with standard units such as K, M, G, etc.\n"));
382 		(void) fprintf(fp, gettext("\nUser-defined properties can "
383 		    "be specified by using a name containing a colon (:).\n"));
384 		(void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
385 		    "properties must be appended with\n"
386 		    "a user or group specifier of one of these forms:\n"
387 		    "    POSIX name      (eg: \"matt\")\n"
388 		    "    POSIX id        (eg: \"126829\")\n"
389 		    "    SMB name@domain (eg: \"matt@sun\")\n"
390 		    "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
391 	} else {
392 		(void) fprintf(fp,
393 		    gettext("\nFor the property list, run: %s\n"),
394 		    "zfs set|get");
395 		(void) fprintf(fp,
396 		    gettext("\nFor the delegated permission list, run: %s\n"),
397 		    "zfs allow|unallow");
398 	}
399 
400 	/*
401 	 * See comments at end of main().
402 	 */
403 	if (getenv("ZFS_ABORT") != NULL) {
404 		(void) printf("dumping core by request\n");
405 		abort();
406 	}
407 
408 	exit(requested ? 0 : 2);
409 }
410 
411 static int
412 parseprop(nvlist_t *props)
413 {
414 	char *propname = optarg;
415 	char *propval, *strval;
416 
417 	if ((propval = strchr(propname, '=')) == NULL) {
418 		(void) fprintf(stderr, gettext("missing "
419 		    "'=' for -o option\n"));
420 		return (-1);
421 	}
422 	*propval = '\0';
423 	propval++;
424 	if (nvlist_lookup_string(props, propname, &strval) == 0) {
425 		(void) fprintf(stderr, gettext("property '%s' "
426 		    "specified multiple times\n"), propname);
427 		return (-1);
428 	}
429 	if (nvlist_add_string(props, propname, propval) != 0) {
430 		(void) fprintf(stderr, gettext("internal "
431 		    "error: out of memory\n"));
432 		return (-1);
433 	}
434 	return (0);
435 }
436 
437 static int
438 parse_depth(char *opt, int *flags)
439 {
440 	char *tmp;
441 	int depth;
442 
443 	depth = (int)strtol(opt, &tmp, 0);
444 	if (*tmp) {
445 		(void) fprintf(stderr,
446 		    gettext("%s is not an integer\n"), optarg);
447 		usage(B_FALSE);
448 	}
449 	if (depth < 0) {
450 		(void) fprintf(stderr,
451 		    gettext("Depth can not be negative.\n"));
452 		usage(B_FALSE);
453 	}
454 	*flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
455 	return (depth);
456 }
457 
458 /*
459  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
460  *
461  * Given an existing dataset, create a writable copy whose initial contents
462  * are the same as the source.  The newly created dataset maintains a
463  * dependency on the original; the original cannot be destroyed so long as
464  * the clone exists.
465  *
466  * The '-p' flag creates all the non-existing ancestors of the target first.
467  */
468 static int
469 zfs_do_clone(int argc, char **argv)
470 {
471 	zfs_handle_t *zhp = NULL;
472 	boolean_t parents = B_FALSE;
473 	nvlist_t *props;
474 	int ret;
475 	int c;
476 
477 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
478 		(void) fprintf(stderr, gettext("internal error: "
479 		    "out of memory\n"));
480 		return (1);
481 	}
482 
483 	/* check options */
484 	while ((c = getopt(argc, argv, "o:p")) != -1) {
485 		switch (c) {
486 		case 'o':
487 			if (parseprop(props))
488 				return (1);
489 			break;
490 		case 'p':
491 			parents = B_TRUE;
492 			break;
493 		case '?':
494 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
495 			    optopt);
496 			goto usage;
497 		}
498 	}
499 
500 	argc -= optind;
501 	argv += optind;
502 
503 	/* check number of arguments */
504 	if (argc < 1) {
505 		(void) fprintf(stderr, gettext("missing source dataset "
506 		    "argument\n"));
507 		goto usage;
508 	}
509 	if (argc < 2) {
510 		(void) fprintf(stderr, gettext("missing target dataset "
511 		    "argument\n"));
512 		goto usage;
513 	}
514 	if (argc > 2) {
515 		(void) fprintf(stderr, gettext("too many arguments\n"));
516 		goto usage;
517 	}
518 
519 	/* open the source dataset */
520 	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
521 		return (1);
522 
523 	if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
524 	    ZFS_TYPE_VOLUME)) {
525 		/*
526 		 * Now create the ancestors of the target dataset.  If the
527 		 * target already exists and '-p' option was used we should not
528 		 * complain.
529 		 */
530 		if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
531 		    ZFS_TYPE_VOLUME))
532 			return (0);
533 		if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
534 			return (1);
535 	}
536 
537 	/* pass to libzfs */
538 	ret = zfs_clone(zhp, argv[1], props);
539 
540 	/* create the mountpoint if necessary */
541 	if (ret == 0) {
542 		zfs_handle_t *clone;
543 
544 		clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
545 		if (clone != NULL) {
546 			if ((ret = zfs_mount(clone, NULL, 0)) == 0)
547 				ret = zfs_share(clone);
548 			zfs_close(clone);
549 		}
550 	}
551 
552 	zfs_close(zhp);
553 	nvlist_free(props);
554 
555 	return (!!ret);
556 
557 usage:
558 	if (zhp)
559 		zfs_close(zhp);
560 	nvlist_free(props);
561 	usage(B_FALSE);
562 	return (-1);
563 }
564 
565 /*
566  * zfs create [-p] [-o prop=value] ... fs
567  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
568  *
569  * Create a new dataset.  This command can be used to create filesystems
570  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
571  * For volumes, the user must specify a size to be used.
572  *
573  * The '-s' flag applies only to volumes, and indicates that we should not try
574  * to set the reservation for this volume.  By default we set a reservation
575  * equal to the size for any volume.  For pools with SPA_VERSION >=
576  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
577  *
578  * The '-p' flag creates all the non-existing ancestors of the target first.
579  */
580 static int
581 zfs_do_create(int argc, char **argv)
582 {
583 	zfs_type_t type = ZFS_TYPE_FILESYSTEM;
584 	zfs_handle_t *zhp = NULL;
585 	uint64_t volsize;
586 	int c;
587 	boolean_t noreserve = B_FALSE;
588 	boolean_t bflag = B_FALSE;
589 	boolean_t parents = B_FALSE;
590 	int ret = 1;
591 	nvlist_t *props;
592 	uint64_t intval;
593 	int canmount;
594 
595 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
596 		(void) fprintf(stderr, gettext("internal error: "
597 		    "out of memory\n"));
598 		return (1);
599 	}
600 
601 	/* check options */
602 	while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
603 		switch (c) {
604 		case 'V':
605 			type = ZFS_TYPE_VOLUME;
606 			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
607 				(void) fprintf(stderr, gettext("bad volume "
608 				    "size '%s': %s\n"), optarg,
609 				    libzfs_error_description(g_zfs));
610 				goto error;
611 			}
612 
613 			if (nvlist_add_uint64(props,
614 			    zfs_prop_to_name(ZFS_PROP_VOLSIZE),
615 			    intval) != 0) {
616 				(void) fprintf(stderr, gettext("internal "
617 				    "error: out of memory\n"));
618 				goto error;
619 			}
620 			volsize = intval;
621 			break;
622 		case 'p':
623 			parents = B_TRUE;
624 			break;
625 		case 'b':
626 			bflag = B_TRUE;
627 			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
628 				(void) fprintf(stderr, gettext("bad volume "
629 				    "block size '%s': %s\n"), optarg,
630 				    libzfs_error_description(g_zfs));
631 				goto error;
632 			}
633 
634 			if (nvlist_add_uint64(props,
635 			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
636 			    intval) != 0) {
637 				(void) fprintf(stderr, gettext("internal "
638 				    "error: out of memory\n"));
639 				goto error;
640 			}
641 			break;
642 		case 'o':
643 			if (parseprop(props))
644 				goto error;
645 			break;
646 		case 's':
647 			noreserve = B_TRUE;
648 			break;
649 		case ':':
650 			(void) fprintf(stderr, gettext("missing size "
651 			    "argument\n"));
652 			goto badusage;
653 			break;
654 		case '?':
655 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
656 			    optopt);
657 			goto badusage;
658 		}
659 	}
660 
661 	if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
662 		(void) fprintf(stderr, gettext("'-s' and '-b' can only be "
663 		    "used when creating a volume\n"));
664 		goto badusage;
665 	}
666 
667 	argc -= optind;
668 	argv += optind;
669 
670 	/* check number of arguments */
671 	if (argc == 0) {
672 		(void) fprintf(stderr, gettext("missing %s argument\n"),
673 		    zfs_type_to_name(type));
674 		goto badusage;
675 	}
676 	if (argc > 1) {
677 		(void) fprintf(stderr, gettext("too many arguments\n"));
678 		goto badusage;
679 	}
680 
681 	if (type == ZFS_TYPE_VOLUME && !noreserve) {
682 		zpool_handle_t *zpool_handle;
683 		uint64_t spa_version;
684 		char *p;
685 		zfs_prop_t resv_prop;
686 		char *strval;
687 
688 		if (p = strchr(argv[0], '/'))
689 			*p = '\0';
690 		zpool_handle = zpool_open(g_zfs, argv[0]);
691 		if (p != NULL)
692 			*p = '/';
693 		if (zpool_handle == NULL)
694 			goto error;
695 		spa_version = zpool_get_prop_int(zpool_handle,
696 		    ZPOOL_PROP_VERSION, NULL);
697 		zpool_close(zpool_handle);
698 		if (spa_version >= SPA_VERSION_REFRESERVATION)
699 			resv_prop = ZFS_PROP_REFRESERVATION;
700 		else
701 			resv_prop = ZFS_PROP_RESERVATION;
702 
703 		if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
704 		    &strval) != 0) {
705 			if (nvlist_add_uint64(props,
706 			    zfs_prop_to_name(resv_prop), volsize) != 0) {
707 				(void) fprintf(stderr, gettext("internal "
708 				    "error: out of memory\n"));
709 				nvlist_free(props);
710 				return (1);
711 			}
712 		}
713 	}
714 
715 	if (parents && zfs_name_valid(argv[0], type)) {
716 		/*
717 		 * Now create the ancestors of target dataset.  If the target
718 		 * already exists and '-p' option was used we should not
719 		 * complain.
720 		 */
721 		if (zfs_dataset_exists(g_zfs, argv[0], type)) {
722 			ret = 0;
723 			goto error;
724 		}
725 		if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
726 			goto error;
727 	}
728 
729 	/* pass to libzfs */
730 	if (zfs_create(g_zfs, argv[0], type, props) != 0)
731 		goto error;
732 
733 	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
734 		goto error;
735 	/*
736 	 * if the user doesn't want the dataset automatically mounted,
737 	 * then skip the mount/share step
738 	 */
739 
740 	canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
741 
742 	/*
743 	 * Mount and/or share the new filesystem as appropriate.  We provide a
744 	 * verbose error message to let the user know that their filesystem was
745 	 * in fact created, even if we failed to mount or share it.
746 	 */
747 	ret = 0;
748 	if (canmount == ZFS_CANMOUNT_ON) {
749 		if (zfs_mount(zhp, NULL, 0) != 0) {
750 			(void) fprintf(stderr, gettext("filesystem "
751 			    "successfully created, but not mounted\n"));
752 			ret = 1;
753 		} else if (zfs_share(zhp) != 0) {
754 			(void) fprintf(stderr, gettext("filesystem "
755 			    "successfully created, but not shared\n"));
756 			ret = 1;
757 		}
758 	}
759 
760 error:
761 	if (zhp)
762 		zfs_close(zhp);
763 	nvlist_free(props);
764 	return (ret);
765 badusage:
766 	nvlist_free(props);
767 	usage(B_FALSE);
768 	return (2);
769 }
770 
771 /*
772  * zfs destroy [-rf] <fs, snap, vol>
773  *
774  * 	-r	Recursively destroy all children
775  * 	-R	Recursively destroy all dependents, including clones
776  * 	-f	Force unmounting of any dependents
777  *
778  * Destroys the given dataset.  By default, it will unmount any filesystems,
779  * and refuse to destroy a dataset that has any dependents.  A dependent can
780  * either be a child, or a clone of a child.
781  */
782 typedef struct destroy_cbdata {
783 	boolean_t	cb_first;
784 	int		cb_force;
785 	int		cb_recurse;
786 	int		cb_error;
787 	int		cb_needforce;
788 	int		cb_doclones;
789 	boolean_t	cb_closezhp;
790 	zfs_handle_t	*cb_target;
791 	char		*cb_snapname;
792 } destroy_cbdata_t;
793 
794 /*
795  * Check for any dependents based on the '-r' or '-R' flags.
796  */
797 static int
798 destroy_check_dependent(zfs_handle_t *zhp, void *data)
799 {
800 	destroy_cbdata_t *cbp = data;
801 	const char *tname = zfs_get_name(cbp->cb_target);
802 	const char *name = zfs_get_name(zhp);
803 
804 	if (strncmp(tname, name, strlen(tname)) == 0 &&
805 	    (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
806 		/*
807 		 * This is a direct descendant, not a clone somewhere else in
808 		 * the hierarchy.
809 		 */
810 		if (cbp->cb_recurse)
811 			goto out;
812 
813 		if (cbp->cb_first) {
814 			(void) fprintf(stderr, gettext("cannot destroy '%s': "
815 			    "%s has children\n"),
816 			    zfs_get_name(cbp->cb_target),
817 			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
818 			(void) fprintf(stderr, gettext("use '-r' to destroy "
819 			    "the following datasets:\n"));
820 			cbp->cb_first = B_FALSE;
821 			cbp->cb_error = 1;
822 		}
823 
824 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
825 	} else {
826 		/*
827 		 * This is a clone.  We only want to report this if the '-r'
828 		 * wasn't specified, or the target is a snapshot.
829 		 */
830 		if (!cbp->cb_recurse &&
831 		    zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
832 			goto out;
833 
834 		if (cbp->cb_first) {
835 			(void) fprintf(stderr, gettext("cannot destroy '%s': "
836 			    "%s has dependent clones\n"),
837 			    zfs_get_name(cbp->cb_target),
838 			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
839 			(void) fprintf(stderr, gettext("use '-R' to destroy "
840 			    "the following datasets:\n"));
841 			cbp->cb_first = B_FALSE;
842 			cbp->cb_error = 1;
843 		}
844 
845 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
846 	}
847 
848 out:
849 	zfs_close(zhp);
850 	return (0);
851 }
852 
853 static int
854 destroy_callback(zfs_handle_t *zhp, void *data)
855 {
856 	destroy_cbdata_t *cbp = data;
857 
858 	/*
859 	 * Ignore pools (which we've already flagged as an error before getting
860 	 * here.
861 	 */
862 	if (strchr(zfs_get_name(zhp), '/') == NULL &&
863 	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
864 		zfs_close(zhp);
865 		return (0);
866 	}
867 
868 	/*
869 	 * Bail out on the first error.
870 	 */
871 	if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
872 	    zfs_destroy(zhp) != 0) {
873 		zfs_close(zhp);
874 		return (-1);
875 	}
876 
877 	zfs_close(zhp);
878 	return (0);
879 }
880 
881 static int
882 destroy_snap_clones(zfs_handle_t *zhp, void *arg)
883 {
884 	destroy_cbdata_t *cbp = arg;
885 	char thissnap[MAXPATHLEN];
886 	zfs_handle_t *szhp;
887 	boolean_t closezhp = cbp->cb_closezhp;
888 	int rv;
889 
890 	(void) snprintf(thissnap, sizeof (thissnap),
891 	    "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
892 
893 	libzfs_print_on_error(g_zfs, B_FALSE);
894 	szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
895 	libzfs_print_on_error(g_zfs, B_TRUE);
896 	if (szhp) {
897 		/*
898 		 * Destroy any clones of this snapshot
899 		 */
900 		if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
901 		    cbp) != 0) {
902 			zfs_close(szhp);
903 			if (closezhp)
904 				zfs_close(zhp);
905 			return (-1);
906 		}
907 		zfs_close(szhp);
908 	}
909 
910 	cbp->cb_closezhp = B_TRUE;
911 	rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
912 	if (closezhp)
913 		zfs_close(zhp);
914 	return (rv);
915 }
916 
917 static int
918 zfs_do_destroy(int argc, char **argv)
919 {
920 	destroy_cbdata_t cb = { 0 };
921 	int c;
922 	zfs_handle_t *zhp;
923 	char *cp;
924 
925 	/* check options */
926 	while ((c = getopt(argc, argv, "frR")) != -1) {
927 		switch (c) {
928 		case 'f':
929 			cb.cb_force = 1;
930 			break;
931 		case 'r':
932 			cb.cb_recurse = 1;
933 			break;
934 		case 'R':
935 			cb.cb_recurse = 1;
936 			cb.cb_doclones = 1;
937 			break;
938 		case '?':
939 		default:
940 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
941 			    optopt);
942 			usage(B_FALSE);
943 		}
944 	}
945 
946 	argc -= optind;
947 	argv += optind;
948 
949 	/* check number of arguments */
950 	if (argc == 0) {
951 		(void) fprintf(stderr, gettext("missing path argument\n"));
952 		usage(B_FALSE);
953 	}
954 	if (argc > 1) {
955 		(void) fprintf(stderr, gettext("too many arguments\n"));
956 		usage(B_FALSE);
957 	}
958 
959 	/*
960 	 * If we are doing recursive destroy of a snapshot, then the
961 	 * named snapshot may not exist.  Go straight to libzfs.
962 	 */
963 	if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
964 		int ret;
965 
966 		*cp = '\0';
967 		if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
968 			return (1);
969 		*cp = '@';
970 		cp++;
971 
972 		if (cb.cb_doclones) {
973 			cb.cb_snapname = cp;
974 			if (destroy_snap_clones(zhp, &cb) != 0) {
975 				zfs_close(zhp);
976 				return (1);
977 			}
978 		}
979 
980 		ret = zfs_destroy_snaps(zhp, cp);
981 		zfs_close(zhp);
982 		if (ret) {
983 			(void) fprintf(stderr,
984 			    gettext("no snapshots destroyed\n"));
985 		}
986 		return (ret != 0);
987 	}
988 
989 
990 	/* Open the given dataset */
991 	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
992 		return (1);
993 
994 	cb.cb_target = zhp;
995 
996 	/*
997 	 * Perform an explicit check for pools before going any further.
998 	 */
999 	if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1000 	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1001 		(void) fprintf(stderr, gettext("cannot destroy '%s': "
1002 		    "operation does not apply to pools\n"),
1003 		    zfs_get_name(zhp));
1004 		(void) fprintf(stderr, gettext("use 'zfs destroy -r "
1005 		    "%s' to destroy all datasets in the pool\n"),
1006 		    zfs_get_name(zhp));
1007 		(void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1008 		    "to destroy the pool itself\n"), zfs_get_name(zhp));
1009 		zfs_close(zhp);
1010 		return (1);
1011 	}
1012 
1013 	/*
1014 	 * Check for any dependents and/or clones.
1015 	 */
1016 	cb.cb_first = B_TRUE;
1017 	if (!cb.cb_doclones &&
1018 	    zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1019 	    &cb) != 0) {
1020 		zfs_close(zhp);
1021 		return (1);
1022 	}
1023 
1024 	if (cb.cb_error ||
1025 	    zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) {
1026 		zfs_close(zhp);
1027 		return (1);
1028 	}
1029 
1030 	/*
1031 	 * Do the real thing.  The callback will close the handle regardless of
1032 	 * whether it succeeds or not.
1033 	 */
1034 
1035 	if (destroy_callback(zhp, &cb) != 0)
1036 		return (1);
1037 
1038 
1039 	return (0);
1040 }
1041 
1042 /*
1043  * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...]
1044  * 	< all | property[,property]... > < fs | snap | vol > ...
1045  *
1046  *	-r	recurse over any child datasets
1047  *	-H	scripted mode.  Headers are stripped, and fields are separated
1048  *		by tabs instead of spaces.
1049  *	-o	Set of fields to display.  One of "name,property,value,source".
1050  *		Default is all four.
1051  *	-s	Set of sources to allow.  One of
1052  *		"local,default,inherited,temporary,none".  Default is all
1053  *		five.
1054  *	-p	Display values in parsable (literal) format.
1055  *
1056  *  Prints properties for the given datasets.  The user can control which
1057  *  columns to display as well as which property types to allow.
1058  */
1059 
1060 /*
1061  * Invoked to display the properties for a single dataset.
1062  */
1063 static int
1064 get_callback(zfs_handle_t *zhp, void *data)
1065 {
1066 	char buf[ZFS_MAXPROPLEN];
1067 	zprop_source_t sourcetype;
1068 	char source[ZFS_MAXNAMELEN];
1069 	zprop_get_cbdata_t *cbp = data;
1070 	nvlist_t *userprop = zfs_get_user_props(zhp);
1071 	zprop_list_t *pl = cbp->cb_proplist;
1072 	nvlist_t *propval;
1073 	char *strval;
1074 	char *sourceval;
1075 
1076 	for (; pl != NULL; pl = pl->pl_next) {
1077 		/*
1078 		 * Skip the special fake placeholder.  This will also skip over
1079 		 * the name property when 'all' is specified.
1080 		 */
1081 		if (pl->pl_prop == ZFS_PROP_NAME &&
1082 		    pl == cbp->cb_proplist)
1083 			continue;
1084 
1085 		if (pl->pl_prop != ZPROP_INVAL) {
1086 			if (zfs_prop_get(zhp, pl->pl_prop, buf,
1087 			    sizeof (buf), &sourcetype, source,
1088 			    sizeof (source),
1089 			    cbp->cb_literal) != 0) {
1090 				if (pl->pl_all)
1091 					continue;
1092 				if (!zfs_prop_valid_for_type(pl->pl_prop,
1093 				    ZFS_TYPE_DATASET)) {
1094 					(void) fprintf(stderr,
1095 					    gettext("No such property '%s'\n"),
1096 					    zfs_prop_to_name(pl->pl_prop));
1097 					continue;
1098 				}
1099 				sourcetype = ZPROP_SRC_NONE;
1100 				(void) strlcpy(buf, "-", sizeof (buf));
1101 			}
1102 
1103 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1104 			    zfs_prop_to_name(pl->pl_prop),
1105 			    buf, sourcetype, source);
1106 		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1107 			sourcetype = ZPROP_SRC_LOCAL;
1108 
1109 			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1110 			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1111 				sourcetype = ZPROP_SRC_NONE;
1112 				(void) strlcpy(buf, "-", sizeof (buf));
1113 			}
1114 
1115 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1116 			    pl->pl_user_prop, buf, sourcetype, source);
1117 		} else {
1118 			if (nvlist_lookup_nvlist(userprop,
1119 			    pl->pl_user_prop, &propval) != 0) {
1120 				if (pl->pl_all)
1121 					continue;
1122 				sourcetype = ZPROP_SRC_NONE;
1123 				strval = "-";
1124 			} else {
1125 				verify(nvlist_lookup_string(propval,
1126 				    ZPROP_VALUE, &strval) == 0);
1127 				verify(nvlist_lookup_string(propval,
1128 				    ZPROP_SOURCE, &sourceval) == 0);
1129 
1130 				if (strcmp(sourceval,
1131 				    zfs_get_name(zhp)) == 0) {
1132 					sourcetype = ZPROP_SRC_LOCAL;
1133 				} else {
1134 					sourcetype = ZPROP_SRC_INHERITED;
1135 					(void) strlcpy(source,
1136 					    sourceval, sizeof (source));
1137 				}
1138 			}
1139 
1140 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1141 			    pl->pl_user_prop, strval, sourcetype,
1142 			    source);
1143 		}
1144 	}
1145 
1146 	return (0);
1147 }
1148 
1149 static int
1150 zfs_do_get(int argc, char **argv)
1151 {
1152 	zprop_get_cbdata_t cb = { 0 };
1153 	int i, c, flags = 0;
1154 	char *value, *fields;
1155 	int ret;
1156 	int limit = 0;
1157 	zprop_list_t fake_name = { 0 };
1158 
1159 	/*
1160 	 * Set up default columns and sources.
1161 	 */
1162 	cb.cb_sources = ZPROP_SRC_ALL;
1163 	cb.cb_columns[0] = GET_COL_NAME;
1164 	cb.cb_columns[1] = GET_COL_PROPERTY;
1165 	cb.cb_columns[2] = GET_COL_VALUE;
1166 	cb.cb_columns[3] = GET_COL_SOURCE;
1167 	cb.cb_type = ZFS_TYPE_DATASET;
1168 
1169 	/* check options */
1170 	while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
1171 		switch (c) {
1172 		case 'p':
1173 			cb.cb_literal = B_TRUE;
1174 			break;
1175 		case 'd':
1176 			limit = parse_depth(optarg, &flags);
1177 			break;
1178 		case 'r':
1179 			flags |= ZFS_ITER_RECURSE;
1180 			break;
1181 		case 'H':
1182 			cb.cb_scripted = B_TRUE;
1183 			break;
1184 		case ':':
1185 			(void) fprintf(stderr, gettext("missing argument for "
1186 			    "'%c' option\n"), optopt);
1187 			usage(B_FALSE);
1188 			break;
1189 		case 'o':
1190 			/*
1191 			 * Process the set of columns to display.  We zero out
1192 			 * the structure to give us a blank slate.
1193 			 */
1194 			bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1195 			i = 0;
1196 			while (*optarg != '\0') {
1197 				static char *col_subopts[] =
1198 				    { "name", "property", "value", "source",
1199 				    NULL };
1200 
1201 				if (i == 4) {
1202 					(void) fprintf(stderr, gettext("too "
1203 					    "many fields given to -o "
1204 					    "option\n"));
1205 					usage(B_FALSE);
1206 				}
1207 
1208 				switch (getsubopt(&optarg, col_subopts,
1209 				    &value)) {
1210 				case 0:
1211 					cb.cb_columns[i++] = GET_COL_NAME;
1212 					break;
1213 				case 1:
1214 					cb.cb_columns[i++] = GET_COL_PROPERTY;
1215 					break;
1216 				case 2:
1217 					cb.cb_columns[i++] = GET_COL_VALUE;
1218 					break;
1219 				case 3:
1220 					cb.cb_columns[i++] = GET_COL_SOURCE;
1221 					break;
1222 				default:
1223 					(void) fprintf(stderr,
1224 					    gettext("invalid column name "
1225 					    "'%s'\n"), value);
1226 					usage(B_FALSE);
1227 				}
1228 			}
1229 			break;
1230 
1231 		case 's':
1232 			cb.cb_sources = 0;
1233 			while (*optarg != '\0') {
1234 				static char *source_subopts[] = {
1235 					"local", "default", "inherited",
1236 					"temporary", "none", NULL };
1237 
1238 				switch (getsubopt(&optarg, source_subopts,
1239 				    &value)) {
1240 				case 0:
1241 					cb.cb_sources |= ZPROP_SRC_LOCAL;
1242 					break;
1243 				case 1:
1244 					cb.cb_sources |= ZPROP_SRC_DEFAULT;
1245 					break;
1246 				case 2:
1247 					cb.cb_sources |= ZPROP_SRC_INHERITED;
1248 					break;
1249 				case 3:
1250 					cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1251 					break;
1252 				case 4:
1253 					cb.cb_sources |= ZPROP_SRC_NONE;
1254 					break;
1255 				default:
1256 					(void) fprintf(stderr,
1257 					    gettext("invalid source "
1258 					    "'%s'\n"), value);
1259 					usage(B_FALSE);
1260 				}
1261 			}
1262 			break;
1263 
1264 		case '?':
1265 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1266 			    optopt);
1267 			usage(B_FALSE);
1268 		}
1269 	}
1270 
1271 	argc -= optind;
1272 	argv += optind;
1273 
1274 	if (argc < 1) {
1275 		(void) fprintf(stderr, gettext("missing property "
1276 		    "argument\n"));
1277 		usage(B_FALSE);
1278 	}
1279 
1280 	fields = argv[0];
1281 
1282 	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1283 	    != 0)
1284 		usage(B_FALSE);
1285 
1286 	argc--;
1287 	argv++;
1288 
1289 	/*
1290 	 * As part of zfs_expand_proplist(), we keep track of the maximum column
1291 	 * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1292 	 * need to know the maximum name length.  However, the user likely did
1293 	 * not specify 'name' as one of the properties to fetch, so we need to
1294 	 * make sure we always include at least this property for
1295 	 * print_get_headers() to work properly.
1296 	 */
1297 	if (cb.cb_proplist != NULL) {
1298 		fake_name.pl_prop = ZFS_PROP_NAME;
1299 		fake_name.pl_width = strlen(gettext("NAME"));
1300 		fake_name.pl_next = cb.cb_proplist;
1301 		cb.cb_proplist = &fake_name;
1302 	}
1303 
1304 	cb.cb_first = B_TRUE;
1305 
1306 	/* run for each object */
1307 	ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1308 	    &cb.cb_proplist, limit, get_callback, &cb);
1309 
1310 	if (cb.cb_proplist == &fake_name)
1311 		zprop_free_list(fake_name.pl_next);
1312 	else
1313 		zprop_free_list(cb.cb_proplist);
1314 
1315 	return (ret);
1316 }
1317 
1318 /*
1319  * inherit [-r] <property> <fs|vol> ...
1320  *
1321  * 	-r	Recurse over all children
1322  *
1323  * For each dataset specified on the command line, inherit the given property
1324  * from its parent.  Inheriting a property at the pool level will cause it to
1325  * use the default value.  The '-r' flag will recurse over all children, and is
1326  * useful for setting a property on a hierarchy-wide basis, regardless of any
1327  * local modifications for each dataset.
1328  */
1329 
1330 static int
1331 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1332 {
1333 	char *propname = data;
1334 	zfs_prop_t prop = zfs_name_to_prop(propname);
1335 
1336 	/*
1337 	 * If we're doing it recursively, then ignore properties that
1338 	 * are not valid for this type of dataset.
1339 	 */
1340 	if (prop != ZPROP_INVAL &&
1341 	    !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1342 		return (0);
1343 
1344 	return (zfs_prop_inherit(zhp, propname) != 0);
1345 }
1346 
1347 static int
1348 inherit_cb(zfs_handle_t *zhp, void *data)
1349 {
1350 	char *propname = data;
1351 
1352 	return (zfs_prop_inherit(zhp, propname) != 0);
1353 }
1354 
1355 static int
1356 zfs_do_inherit(int argc, char **argv)
1357 {
1358 	int c;
1359 	zfs_prop_t prop;
1360 	char *propname;
1361 	int ret;
1362 	int flags = 0;
1363 
1364 	/* check options */
1365 	while ((c = getopt(argc, argv, "r")) != -1) {
1366 		switch (c) {
1367 		case 'r':
1368 			flags |= ZFS_ITER_RECURSE;
1369 			break;
1370 		case '?':
1371 		default:
1372 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1373 			    optopt);
1374 			usage(B_FALSE);
1375 		}
1376 	}
1377 
1378 	argc -= optind;
1379 	argv += optind;
1380 
1381 	/* check number of arguments */
1382 	if (argc < 1) {
1383 		(void) fprintf(stderr, gettext("missing property argument\n"));
1384 		usage(B_FALSE);
1385 	}
1386 	if (argc < 2) {
1387 		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1388 		usage(B_FALSE);
1389 	}
1390 
1391 	propname = argv[0];
1392 	argc--;
1393 	argv++;
1394 
1395 	if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1396 		if (zfs_prop_readonly(prop)) {
1397 			(void) fprintf(stderr, gettext(
1398 			    "%s property is read-only\n"),
1399 			    propname);
1400 			return (1);
1401 		}
1402 		if (!zfs_prop_inheritable(prop)) {
1403 			(void) fprintf(stderr, gettext("'%s' property cannot "
1404 			    "be inherited\n"), propname);
1405 			if (prop == ZFS_PROP_QUOTA ||
1406 			    prop == ZFS_PROP_RESERVATION ||
1407 			    prop == ZFS_PROP_REFQUOTA ||
1408 			    prop == ZFS_PROP_REFRESERVATION)
1409 				(void) fprintf(stderr, gettext("use 'zfs set "
1410 				    "%s=none' to clear\n"), propname);
1411 			return (1);
1412 		}
1413 	} else if (!zfs_prop_user(propname)) {
1414 		(void) fprintf(stderr, gettext("invalid property '%s'\n"),
1415 		    propname);
1416 		usage(B_FALSE);
1417 	}
1418 
1419 	if (flags & ZFS_ITER_RECURSE) {
1420 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1421 		    NULL, NULL, 0, inherit_recurse_cb, propname);
1422 	} else {
1423 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1424 		    NULL, NULL, 0, inherit_cb, propname);
1425 	}
1426 
1427 	return (ret);
1428 }
1429 
1430 typedef struct upgrade_cbdata {
1431 	uint64_t cb_numupgraded;
1432 	uint64_t cb_numsamegraded;
1433 	uint64_t cb_numfailed;
1434 	uint64_t cb_version;
1435 	boolean_t cb_newer;
1436 	boolean_t cb_foundone;
1437 	char cb_lastfs[ZFS_MAXNAMELEN];
1438 } upgrade_cbdata_t;
1439 
1440 static int
1441 same_pool(zfs_handle_t *zhp, const char *name)
1442 {
1443 	int len1 = strcspn(name, "/@");
1444 	const char *zhname = zfs_get_name(zhp);
1445 	int len2 = strcspn(zhname, "/@");
1446 
1447 	if (len1 != len2)
1448 		return (B_FALSE);
1449 	return (strncmp(name, zhname, len1) == 0);
1450 }
1451 
1452 static int
1453 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1454 {
1455 	upgrade_cbdata_t *cb = data;
1456 	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1457 
1458 	/* list if it's old/new */
1459 	if ((!cb->cb_newer && version < ZPL_VERSION) ||
1460 	    (cb->cb_newer && version > ZPL_VERSION)) {
1461 		char *str;
1462 		if (cb->cb_newer) {
1463 			str = gettext("The following filesystems are "
1464 			    "formatted using a newer software version and\n"
1465 			    "cannot be accessed on the current system.\n\n");
1466 		} else {
1467 			str = gettext("The following filesystems are "
1468 			    "out of date, and can be upgraded.  After being\n"
1469 			    "upgraded, these filesystems (and any 'zfs send' "
1470 			    "streams generated from\n"
1471 			    "subsequent snapshots) will no longer be "
1472 			    "accessible by older software versions.\n\n");
1473 		}
1474 
1475 		if (!cb->cb_foundone) {
1476 			(void) puts(str);
1477 			(void) printf(gettext("VER  FILESYSTEM\n"));
1478 			(void) printf(gettext("---  ------------\n"));
1479 			cb->cb_foundone = B_TRUE;
1480 		}
1481 
1482 		(void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1483 	}
1484 
1485 	return (0);
1486 }
1487 
1488 static int
1489 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1490 {
1491 	upgrade_cbdata_t *cb = data;
1492 	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1493 	int i;
1494 	static struct { int zplver; int spaver; } table[] = {
1495 		{ZPL_VERSION_FUID, SPA_VERSION_FUID},
1496 		{ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
1497 		{0, 0}
1498 	};
1499 
1500 
1501 	for (i = 0; table[i].zplver; i++) {
1502 		if (cb->cb_version >= table[i].zplver) {
1503 			int spa_version;
1504 
1505 			if (zfs_spa_version(zhp, &spa_version) < 0)
1506 				return (-1);
1507 
1508 			if (spa_version < table[i].spaver) {
1509 				/* can't upgrade */
1510 				(void) printf(gettext("%s: can not be "
1511 				    "upgraded; the pool version needs to first "
1512 				    "be upgraded\nto version %d\n\n"),
1513 				    zfs_get_name(zhp), table[i].spaver);
1514 				cb->cb_numfailed++;
1515 				return (0);
1516 			}
1517 		}
1518 	}
1519 
1520 	/* upgrade */
1521 	if (version < cb->cb_version) {
1522 		char verstr[16];
1523 		(void) snprintf(verstr, sizeof (verstr),
1524 		    "%llu", cb->cb_version);
1525 		if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1526 			/*
1527 			 * If they did "zfs upgrade -a", then we could
1528 			 * be doing ioctls to different pools.  We need
1529 			 * to log this history once to each pool.
1530 			 */
1531 			verify(zpool_stage_history(g_zfs, history_str) == 0);
1532 		}
1533 		if (zfs_prop_set(zhp, "version", verstr) == 0)
1534 			cb->cb_numupgraded++;
1535 		else
1536 			cb->cb_numfailed++;
1537 		(void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1538 	} else if (version > cb->cb_version) {
1539 		/* can't downgrade */
1540 		(void) printf(gettext("%s: can not be downgraded; "
1541 		    "it is already at version %u\n"),
1542 		    zfs_get_name(zhp), version);
1543 		cb->cb_numfailed++;
1544 	} else {
1545 		cb->cb_numsamegraded++;
1546 	}
1547 	return (0);
1548 }
1549 
1550 /*
1551  * zfs upgrade
1552  * zfs upgrade -v
1553  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1554  */
1555 static int
1556 zfs_do_upgrade(int argc, char **argv)
1557 {
1558 	boolean_t all = B_FALSE;
1559 	boolean_t showversions = B_FALSE;
1560 	int ret;
1561 	upgrade_cbdata_t cb = { 0 };
1562 	char c;
1563 	int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1564 
1565 	/* check options */
1566 	while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1567 		switch (c) {
1568 		case 'r':
1569 			flags |= ZFS_ITER_RECURSE;
1570 			break;
1571 		case 'v':
1572 			showversions = B_TRUE;
1573 			break;
1574 		case 'V':
1575 			if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1576 			    optarg, &cb.cb_version) != 0) {
1577 				(void) fprintf(stderr,
1578 				    gettext("invalid version %s\n"), optarg);
1579 				usage(B_FALSE);
1580 			}
1581 			break;
1582 		case 'a':
1583 			all = B_TRUE;
1584 			break;
1585 		case '?':
1586 		default:
1587 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1588 			    optopt);
1589 			usage(B_FALSE);
1590 		}
1591 	}
1592 
1593 	argc -= optind;
1594 	argv += optind;
1595 
1596 	if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1597 		usage(B_FALSE);
1598 	if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1599 	    cb.cb_version || argc))
1600 		usage(B_FALSE);
1601 	if ((all || argc) && (showversions))
1602 		usage(B_FALSE);
1603 	if (all && argc)
1604 		usage(B_FALSE);
1605 
1606 	if (showversions) {
1607 		/* Show info on available versions. */
1608 		(void) printf(gettext("The following filesystem versions are "
1609 		    "supported:\n\n"));
1610 		(void) printf(gettext("VER  DESCRIPTION\n"));
1611 		(void) printf("---  -----------------------------------------"
1612 		    "---------------\n");
1613 		(void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1614 		(void) printf(gettext(" 2   Enhanced directory entries\n"));
1615 		(void) printf(gettext(" 3   Case insensitive and File system "
1616 		    "unique identifer (FUID)\n"));
1617 		(void) printf(gettext(" 4   userquota, groupquota "
1618 		    "properties\n"));
1619 		(void) printf(gettext("\nFor more information on a particular "
1620 		    "version, including supported releases, see:\n\n"));
1621 		(void) printf("http://www.opensolaris.org/os/community/zfs/"
1622 		    "version/zpl/N\n\n");
1623 		(void) printf(gettext("Where 'N' is the version number.\n"));
1624 		ret = 0;
1625 	} else if (argc || all) {
1626 		/* Upgrade filesystems */
1627 		if (cb.cb_version == 0)
1628 			cb.cb_version = ZPL_VERSION;
1629 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1630 		    NULL, NULL, 0, upgrade_set_callback, &cb);
1631 		(void) printf(gettext("%llu filesystems upgraded\n"),
1632 		    cb.cb_numupgraded);
1633 		if (cb.cb_numsamegraded) {
1634 			(void) printf(gettext("%llu filesystems already at "
1635 			    "this version\n"),
1636 			    cb.cb_numsamegraded);
1637 		}
1638 		if (cb.cb_numfailed != 0)
1639 			ret = 1;
1640 	} else {
1641 		/* List old-version filesytems */
1642 		boolean_t found;
1643 		(void) printf(gettext("This system is currently running "
1644 		    "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1645 
1646 		flags |= ZFS_ITER_RECURSE;
1647 		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1648 		    NULL, NULL, 0, upgrade_list_callback, &cb);
1649 
1650 		found = cb.cb_foundone;
1651 		cb.cb_foundone = B_FALSE;
1652 		cb.cb_newer = B_TRUE;
1653 
1654 		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1655 		    NULL, NULL, 0, upgrade_list_callback, &cb);
1656 
1657 		if (!cb.cb_foundone && !found) {
1658 			(void) printf(gettext("All filesystems are "
1659 			    "formatted with the current version.\n"));
1660 		}
1661 	}
1662 
1663 	return (ret);
1664 }
1665 
1666 /*
1667  * zfs userspace
1668  */
1669 static int
1670 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
1671 {
1672 	zfs_userquota_prop_t *typep = arg;
1673 	zfs_userquota_prop_t p = *typep;
1674 	char *name = NULL;
1675 	char *ug, *propname;
1676 	char namebuf[32];
1677 	char sizebuf[32];
1678 
1679 	if (domain == NULL || domain[0] == '\0') {
1680 		if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) {
1681 			struct group *g = getgrgid(rid);
1682 			if (g)
1683 				name = g->gr_name;
1684 		} else {
1685 			struct passwd *p = getpwuid(rid);
1686 			if (p)
1687 				name = p->pw_name;
1688 		}
1689 	}
1690 
1691 	if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA)
1692 		ug = "group";
1693 	else
1694 		ug = "user";
1695 
1696 	if (p == ZFS_PROP_USERUSED || p == ZFS_PROP_GROUPUSED)
1697 		propname = "used";
1698 	else
1699 		propname = "quota";
1700 
1701 	if (name == NULL) {
1702 		(void) snprintf(namebuf, sizeof (namebuf),
1703 		    "%llu", (longlong_t)rid);
1704 		name = namebuf;
1705 	}
1706 	zfs_nicenum(space, sizebuf, sizeof (sizebuf));
1707 
1708 	(void) printf("%s %s %s%c%s %s\n", propname, ug, domain,
1709 	    domain[0] ? '-' : ' ', name, sizebuf);
1710 
1711 	return (0);
1712 }
1713 
1714 static int
1715 zfs_do_userspace(int argc, char **argv)
1716 {
1717 	zfs_handle_t *zhp;
1718 	zfs_userquota_prop_t p;
1719 	int error;
1720 
1721 	/*
1722 	 * Try the python version.  If the execv fails, we'll continue
1723 	 * and do a simplistic implementation.
1724 	 */
1725 	(void) execv(pypath, argv-1);
1726 
1727 	(void) printf("internal error: %s not found\n"
1728 	    "falling back on built-in implementation, "
1729 	    "some features will not work\n", pypath);
1730 
1731 	if ((zhp = zfs_open(g_zfs, argv[argc-1], ZFS_TYPE_DATASET)) == NULL)
1732 		return (1);
1733 
1734 	(void) printf("PROP TYPE NAME VALUE\n");
1735 
1736 	for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
1737 		error = zfs_userspace(zhp, p, userspace_cb, &p);
1738 		if (error)
1739 			break;
1740 	}
1741 	return (error);
1742 }
1743 
1744 /*
1745  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
1746  *      [-s property [-s property]...] [-S property [-S property]...]
1747  *      <dataset> ...
1748  *
1749  * 	-r	Recurse over all children
1750  * 	-d	Limit recursion by depth.
1751  * 	-H	Scripted mode; elide headers and separate columns by tabs
1752  * 	-o	Control which fields to display.
1753  * 	-t	Control which object types to display.
1754  *	-s	Specify sort columns, descending order.
1755  *	-S	Specify sort columns, ascending order.
1756  *
1757  * When given no arguments, lists all filesystems in the system.
1758  * Otherwise, list the specified datasets, optionally recursing down them if
1759  * '-r' is specified.
1760  */
1761 typedef struct list_cbdata {
1762 	boolean_t	cb_first;
1763 	boolean_t	cb_scripted;
1764 	zprop_list_t	*cb_proplist;
1765 } list_cbdata_t;
1766 
1767 /*
1768  * Given a list of columns to display, output appropriate headers for each one.
1769  */
1770 static void
1771 print_header(zprop_list_t *pl)
1772 {
1773 	char headerbuf[ZFS_MAXPROPLEN];
1774 	const char *header;
1775 	int i;
1776 	boolean_t first = B_TRUE;
1777 	boolean_t right_justify;
1778 
1779 	for (; pl != NULL; pl = pl->pl_next) {
1780 		if (!first) {
1781 			(void) printf("  ");
1782 		} else {
1783 			first = B_FALSE;
1784 		}
1785 
1786 		right_justify = B_FALSE;
1787 		if (pl->pl_prop != ZPROP_INVAL) {
1788 			header = zfs_prop_column_name(pl->pl_prop);
1789 			right_justify = zfs_prop_align_right(pl->pl_prop);
1790 		} else {
1791 			for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1792 				headerbuf[i] = toupper(pl->pl_user_prop[i]);
1793 			headerbuf[i] = '\0';
1794 			header = headerbuf;
1795 		}
1796 
1797 		if (pl->pl_next == NULL && !right_justify)
1798 			(void) printf("%s", header);
1799 		else if (right_justify)
1800 			(void) printf("%*s", pl->pl_width, header);
1801 		else
1802 			(void) printf("%-*s", pl->pl_width, header);
1803 	}
1804 
1805 	(void) printf("\n");
1806 }
1807 
1808 /*
1809  * Given a dataset and a list of fields, print out all the properties according
1810  * to the described layout.
1811  */
1812 static void
1813 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1814 {
1815 	boolean_t first = B_TRUE;
1816 	char property[ZFS_MAXPROPLEN];
1817 	nvlist_t *userprops = zfs_get_user_props(zhp);
1818 	nvlist_t *propval;
1819 	char *propstr;
1820 	boolean_t right_justify;
1821 	int width;
1822 
1823 	for (; pl != NULL; pl = pl->pl_next) {
1824 		if (!first) {
1825 			if (scripted)
1826 				(void) printf("\t");
1827 			else
1828 				(void) printf("  ");
1829 		} else {
1830 			first = B_FALSE;
1831 		}
1832 
1833 		if (pl->pl_prop != ZPROP_INVAL) {
1834 			if (zfs_prop_get(zhp, pl->pl_prop, property,
1835 			    sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
1836 				propstr = "-";
1837 			else
1838 				propstr = property;
1839 
1840 			right_justify = zfs_prop_align_right(pl->pl_prop);
1841 		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1842 			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1843 			    property, sizeof (property), B_FALSE) != 0)
1844 				propstr = "-";
1845 			else
1846 				propstr = property;
1847 			right_justify = B_TRUE;
1848 		} else {
1849 			if (nvlist_lookup_nvlist(userprops,
1850 			    pl->pl_user_prop, &propval) != 0)
1851 				propstr = "-";
1852 			else
1853 				verify(nvlist_lookup_string(propval,
1854 				    ZPROP_VALUE, &propstr) == 0);
1855 			right_justify = B_FALSE;
1856 		}
1857 
1858 		width = pl->pl_width;
1859 
1860 		/*
1861 		 * If this is being called in scripted mode, or if this is the
1862 		 * last column and it is left-justified, don't include a width
1863 		 * format specifier.
1864 		 */
1865 		if (scripted || (pl->pl_next == NULL && !right_justify))
1866 			(void) printf("%s", propstr);
1867 		else if (right_justify)
1868 			(void) printf("%*s", width, propstr);
1869 		else
1870 			(void) printf("%-*s", width, propstr);
1871 	}
1872 
1873 	(void) printf("\n");
1874 }
1875 
1876 /*
1877  * Generic callback function to list a dataset or snapshot.
1878  */
1879 static int
1880 list_callback(zfs_handle_t *zhp, void *data)
1881 {
1882 	list_cbdata_t *cbp = data;
1883 
1884 	if (cbp->cb_first) {
1885 		if (!cbp->cb_scripted)
1886 			print_header(cbp->cb_proplist);
1887 		cbp->cb_first = B_FALSE;
1888 	}
1889 
1890 	print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
1891 
1892 	return (0);
1893 }
1894 
1895 static int
1896 zfs_do_list(int argc, char **argv)
1897 {
1898 	int c;
1899 	boolean_t scripted = B_FALSE;
1900 	static char default_fields[] =
1901 	    "name,used,available,referenced,mountpoint";
1902 	int types = ZFS_TYPE_DATASET;
1903 	boolean_t types_specified = B_FALSE;
1904 	char *fields = NULL;
1905 	list_cbdata_t cb = { 0 };
1906 	char *value;
1907 	int limit = 0;
1908 	int ret;
1909 	zfs_sort_column_t *sortcol = NULL;
1910 	int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
1911 
1912 	/* check options */
1913 	while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
1914 		switch (c) {
1915 		case 'o':
1916 			fields = optarg;
1917 			break;
1918 		case 'd':
1919 			limit = parse_depth(optarg, &flags);
1920 			break;
1921 		case 'r':
1922 			flags |= ZFS_ITER_RECURSE;
1923 			break;
1924 		case 'H':
1925 			scripted = B_TRUE;
1926 			break;
1927 		case 's':
1928 			if (zfs_add_sort_column(&sortcol, optarg,
1929 			    B_FALSE) != 0) {
1930 				(void) fprintf(stderr,
1931 				    gettext("invalid property '%s'\n"), optarg);
1932 				usage(B_FALSE);
1933 			}
1934 			break;
1935 		case 'S':
1936 			if (zfs_add_sort_column(&sortcol, optarg,
1937 			    B_TRUE) != 0) {
1938 				(void) fprintf(stderr,
1939 				    gettext("invalid property '%s'\n"), optarg);
1940 				usage(B_FALSE);
1941 			}
1942 			break;
1943 		case 't':
1944 			types = 0;
1945 			types_specified = B_TRUE;
1946 			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1947 			while (*optarg != '\0') {
1948 				static char *type_subopts[] = { "filesystem",
1949 				    "volume", "snapshot", "all", NULL };
1950 
1951 				switch (getsubopt(&optarg, type_subopts,
1952 				    &value)) {
1953 				case 0:
1954 					types |= ZFS_TYPE_FILESYSTEM;
1955 					break;
1956 				case 1:
1957 					types |= ZFS_TYPE_VOLUME;
1958 					break;
1959 				case 2:
1960 					types |= ZFS_TYPE_SNAPSHOT;
1961 					break;
1962 				case 3:
1963 					types = ZFS_TYPE_DATASET;
1964 					break;
1965 
1966 				default:
1967 					(void) fprintf(stderr,
1968 					    gettext("invalid type '%s'\n"),
1969 					    value);
1970 					usage(B_FALSE);
1971 				}
1972 			}
1973 			break;
1974 		case ':':
1975 			(void) fprintf(stderr, gettext("missing argument for "
1976 			    "'%c' option\n"), optopt);
1977 			usage(B_FALSE);
1978 			break;
1979 		case '?':
1980 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1981 			    optopt);
1982 			usage(B_FALSE);
1983 		}
1984 	}
1985 
1986 	argc -= optind;
1987 	argv += optind;
1988 
1989 	if (fields == NULL)
1990 		fields = default_fields;
1991 
1992 	/*
1993 	 * If "-o space" and no types were specified, don't display snapshots.
1994 	 */
1995 	if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
1996 		types &= ~ZFS_TYPE_SNAPSHOT;
1997 
1998 	/*
1999 	 * If the user specifies '-o all', the zprop_get_list() doesn't
2000 	 * normally include the name of the dataset.  For 'zfs list', we always
2001 	 * want this property to be first.
2002 	 */
2003 	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
2004 	    != 0)
2005 		usage(B_FALSE);
2006 
2007 	cb.cb_scripted = scripted;
2008 	cb.cb_first = B_TRUE;
2009 
2010 	ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
2011 	    limit, list_callback, &cb);
2012 
2013 	zprop_free_list(cb.cb_proplist);
2014 	zfs_free_sort_columns(sortcol);
2015 
2016 	if (ret == 0 && cb.cb_first && !cb.cb_scripted)
2017 		(void) printf(gettext("no datasets available\n"));
2018 
2019 	return (ret);
2020 }
2021 
2022 /*
2023  * zfs rename <fs | snap | vol> <fs | snap | vol>
2024  * zfs rename -p <fs | vol> <fs | vol>
2025  * zfs rename -r <snap> <snap>
2026  *
2027  * Renames the given dataset to another of the same type.
2028  *
2029  * The '-p' flag creates all the non-existing ancestors of the target first.
2030  */
2031 /* ARGSUSED */
2032 static int
2033 zfs_do_rename(int argc, char **argv)
2034 {
2035 	zfs_handle_t *zhp;
2036 	int c;
2037 	int ret;
2038 	boolean_t recurse = B_FALSE;
2039 	boolean_t parents = B_FALSE;
2040 
2041 	/* check options */
2042 	while ((c = getopt(argc, argv, "pr")) != -1) {
2043 		switch (c) {
2044 		case 'p':
2045 			parents = B_TRUE;
2046 			break;
2047 		case 'r':
2048 			recurse = B_TRUE;
2049 			break;
2050 		case '?':
2051 		default:
2052 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2053 			    optopt);
2054 			usage(B_FALSE);
2055 		}
2056 	}
2057 
2058 	argc -= optind;
2059 	argv += optind;
2060 
2061 	/* check number of arguments */
2062 	if (argc < 1) {
2063 		(void) fprintf(stderr, gettext("missing source dataset "
2064 		    "argument\n"));
2065 		usage(B_FALSE);
2066 	}
2067 	if (argc < 2) {
2068 		(void) fprintf(stderr, gettext("missing target dataset "
2069 		    "argument\n"));
2070 		usage(B_FALSE);
2071 	}
2072 	if (argc > 2) {
2073 		(void) fprintf(stderr, gettext("too many arguments\n"));
2074 		usage(B_FALSE);
2075 	}
2076 
2077 	if (recurse && parents) {
2078 		(void) fprintf(stderr, gettext("-p and -r options are mutually "
2079 		    "exclusive\n"));
2080 		usage(B_FALSE);
2081 	}
2082 
2083 	if (recurse && strchr(argv[0], '@') == 0) {
2084 		(void) fprintf(stderr, gettext("source dataset for recursive "
2085 		    "rename must be a snapshot\n"));
2086 		usage(B_FALSE);
2087 	}
2088 
2089 	if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
2090 	    ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
2091 		return (1);
2092 
2093 	/* If we were asked and the name looks good, try to create ancestors. */
2094 	if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
2095 	    zfs_create_ancestors(g_zfs, argv[1]) != 0) {
2096 		zfs_close(zhp);
2097 		return (1);
2098 	}
2099 
2100 	ret = (zfs_rename(zhp, argv[1], recurse) != 0);
2101 
2102 	zfs_close(zhp);
2103 	return (ret);
2104 }
2105 
2106 /*
2107  * zfs promote <fs>
2108  *
2109  * Promotes the given clone fs to be the parent
2110  */
2111 /* ARGSUSED */
2112 static int
2113 zfs_do_promote(int argc, char **argv)
2114 {
2115 	zfs_handle_t *zhp;
2116 	int ret;
2117 
2118 	/* check options */
2119 	if (argc > 1 && argv[1][0] == '-') {
2120 		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2121 		    argv[1][1]);
2122 		usage(B_FALSE);
2123 	}
2124 
2125 	/* check number of arguments */
2126 	if (argc < 2) {
2127 		(void) fprintf(stderr, gettext("missing clone filesystem"
2128 		    " argument\n"));
2129 		usage(B_FALSE);
2130 	}
2131 	if (argc > 2) {
2132 		(void) fprintf(stderr, gettext("too many arguments\n"));
2133 		usage(B_FALSE);
2134 	}
2135 
2136 	zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2137 	if (zhp == NULL)
2138 		return (1);
2139 
2140 	ret = (zfs_promote(zhp) != 0);
2141 
2142 
2143 	zfs_close(zhp);
2144 	return (ret);
2145 }
2146 
2147 /*
2148  * zfs rollback [-rRf] <snapshot>
2149  *
2150  * 	-r	Delete any intervening snapshots before doing rollback
2151  * 	-R	Delete any snapshots and their clones
2152  * 	-f	ignored for backwards compatability
2153  *
2154  * Given a filesystem, rollback to a specific snapshot, discarding any changes
2155  * since then and making it the active dataset.  If more recent snapshots exist,
2156  * the command will complain unless the '-r' flag is given.
2157  */
2158 typedef struct rollback_cbdata {
2159 	uint64_t	cb_create;
2160 	boolean_t	cb_first;
2161 	int		cb_doclones;
2162 	char		*cb_target;
2163 	int		cb_error;
2164 	boolean_t	cb_recurse;
2165 	boolean_t	cb_dependent;
2166 } rollback_cbdata_t;
2167 
2168 /*
2169  * Report any snapshots more recent than the one specified.  Used when '-r' is
2170  * not specified.  We reuse this same callback for the snapshot dependents - if
2171  * 'cb_dependent' is set, then this is a dependent and we should report it
2172  * without checking the transaction group.
2173  */
2174 static int
2175 rollback_check(zfs_handle_t *zhp, void *data)
2176 {
2177 	rollback_cbdata_t *cbp = data;
2178 
2179 	if (cbp->cb_doclones) {
2180 		zfs_close(zhp);
2181 		return (0);
2182 	}
2183 
2184 	if (!cbp->cb_dependent) {
2185 		if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
2186 		    zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
2187 		    zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
2188 		    cbp->cb_create) {
2189 
2190 			if (cbp->cb_first && !cbp->cb_recurse) {
2191 				(void) fprintf(stderr, gettext("cannot "
2192 				    "rollback to '%s': more recent snapshots "
2193 				    "exist\n"),
2194 				    cbp->cb_target);
2195 				(void) fprintf(stderr, gettext("use '-r' to "
2196 				    "force deletion of the following "
2197 				    "snapshots:\n"));
2198 				cbp->cb_first = 0;
2199 				cbp->cb_error = 1;
2200 			}
2201 
2202 			if (cbp->cb_recurse) {
2203 				cbp->cb_dependent = B_TRUE;
2204 				if (zfs_iter_dependents(zhp, B_TRUE,
2205 				    rollback_check, cbp) != 0) {
2206 					zfs_close(zhp);
2207 					return (-1);
2208 				}
2209 				cbp->cb_dependent = B_FALSE;
2210 			} else {
2211 				(void) fprintf(stderr, "%s\n",
2212 				    zfs_get_name(zhp));
2213 			}
2214 		}
2215 	} else {
2216 		if (cbp->cb_first && cbp->cb_recurse) {
2217 			(void) fprintf(stderr, gettext("cannot rollback to "
2218 			    "'%s': clones of previous snapshots exist\n"),
2219 			    cbp->cb_target);
2220 			(void) fprintf(stderr, gettext("use '-R' to "
2221 			    "force deletion of the following clones and "
2222 			    "dependents:\n"));
2223 			cbp->cb_first = 0;
2224 			cbp->cb_error = 1;
2225 		}
2226 
2227 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2228 	}
2229 
2230 	zfs_close(zhp);
2231 	return (0);
2232 }
2233 
2234 static int
2235 zfs_do_rollback(int argc, char **argv)
2236 {
2237 	int ret;
2238 	int c;
2239 	boolean_t force = B_FALSE;
2240 	rollback_cbdata_t cb = { 0 };
2241 	zfs_handle_t *zhp, *snap;
2242 	char parentname[ZFS_MAXNAMELEN];
2243 	char *delim;
2244 
2245 	/* check options */
2246 	while ((c = getopt(argc, argv, "rRf")) != -1) {
2247 		switch (c) {
2248 		case 'r':
2249 			cb.cb_recurse = 1;
2250 			break;
2251 		case 'R':
2252 			cb.cb_recurse = 1;
2253 			cb.cb_doclones = 1;
2254 			break;
2255 		case 'f':
2256 			force = B_TRUE;
2257 			break;
2258 		case '?':
2259 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2260 			    optopt);
2261 			usage(B_FALSE);
2262 		}
2263 	}
2264 
2265 	argc -= optind;
2266 	argv += optind;
2267 
2268 	/* check number of arguments */
2269 	if (argc < 1) {
2270 		(void) fprintf(stderr, gettext("missing dataset argument\n"));
2271 		usage(B_FALSE);
2272 	}
2273 	if (argc > 1) {
2274 		(void) fprintf(stderr, gettext("too many arguments\n"));
2275 		usage(B_FALSE);
2276 	}
2277 
2278 	/* open the snapshot */
2279 	if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2280 		return (1);
2281 
2282 	/* open the parent dataset */
2283 	(void) strlcpy(parentname, argv[0], sizeof (parentname));
2284 	verify((delim = strrchr(parentname, '@')) != NULL);
2285 	*delim = '\0';
2286 	if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2287 		zfs_close(snap);
2288 		return (1);
2289 	}
2290 
2291 	/*
2292 	 * Check for more recent snapshots and/or clones based on the presence
2293 	 * of '-r' and '-R'.
2294 	 */
2295 	cb.cb_target = argv[0];
2296 	cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2297 	cb.cb_first = B_TRUE;
2298 	cb.cb_error = 0;
2299 	if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2300 		goto out;
2301 
2302 	if ((ret = cb.cb_error) != 0)
2303 		goto out;
2304 
2305 	/*
2306 	 * Rollback parent to the given snapshot.
2307 	 */
2308 	ret = zfs_rollback(zhp, snap, force);
2309 
2310 out:
2311 	zfs_close(snap);
2312 	zfs_close(zhp);
2313 
2314 	if (ret == 0)
2315 		return (0);
2316 	else
2317 		return (1);
2318 }
2319 
2320 /*
2321  * zfs set property=value { fs | snap | vol } ...
2322  *
2323  * Sets the given property for all datasets specified on the command line.
2324  */
2325 typedef struct set_cbdata {
2326 	char		*cb_propname;
2327 	char		*cb_value;
2328 } set_cbdata_t;
2329 
2330 static int
2331 set_callback(zfs_handle_t *zhp, void *data)
2332 {
2333 	set_cbdata_t *cbp = data;
2334 
2335 	if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2336 		switch (libzfs_errno(g_zfs)) {
2337 		case EZFS_MOUNTFAILED:
2338 			(void) fprintf(stderr, gettext("property may be set "
2339 			    "but unable to remount filesystem\n"));
2340 			break;
2341 		case EZFS_SHARENFSFAILED:
2342 			(void) fprintf(stderr, gettext("property may be set "
2343 			    "but unable to reshare filesystem\n"));
2344 			break;
2345 		}
2346 		return (1);
2347 	}
2348 	return (0);
2349 }
2350 
2351 static int
2352 zfs_do_set(int argc, char **argv)
2353 {
2354 	set_cbdata_t cb;
2355 	int ret;
2356 
2357 	/* check for options */
2358 	if (argc > 1 && argv[1][0] == '-') {
2359 		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2360 		    argv[1][1]);
2361 		usage(B_FALSE);
2362 	}
2363 
2364 	/* check number of arguments */
2365 	if (argc < 2) {
2366 		(void) fprintf(stderr, gettext("missing property=value "
2367 		    "argument\n"));
2368 		usage(B_FALSE);
2369 	}
2370 	if (argc < 3) {
2371 		(void) fprintf(stderr, gettext("missing dataset name\n"));
2372 		usage(B_FALSE);
2373 	}
2374 
2375 	/* validate property=value argument */
2376 	cb.cb_propname = argv[1];
2377 	if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
2378 	    (cb.cb_value[1] == '\0')) {
2379 		(void) fprintf(stderr, gettext("missing value in "
2380 		    "property=value argument\n"));
2381 		usage(B_FALSE);
2382 	}
2383 
2384 	*cb.cb_value = '\0';
2385 	cb.cb_value++;
2386 
2387 	if (*cb.cb_propname == '\0') {
2388 		(void) fprintf(stderr,
2389 		    gettext("missing property in property=value argument\n"));
2390 		usage(B_FALSE);
2391 	}
2392 
2393 	ret = zfs_for_each(argc - 2, argv + 2, NULL,
2394 	    ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
2395 
2396 	return (ret);
2397 }
2398 
2399 /*
2400  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
2401  *
2402  * Creates a snapshot with the given name.  While functionally equivalent to
2403  * 'zfs create', it is a separate command to differentiate intent.
2404  */
2405 static int
2406 zfs_do_snapshot(int argc, char **argv)
2407 {
2408 	boolean_t recursive = B_FALSE;
2409 	int ret;
2410 	char c;
2411 	nvlist_t *props;
2412 
2413 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
2414 		(void) fprintf(stderr, gettext("internal error: "
2415 		    "out of memory\n"));
2416 		return (1);
2417 	}
2418 
2419 	/* check options */
2420 	while ((c = getopt(argc, argv, "ro:")) != -1) {
2421 		switch (c) {
2422 		case 'o':
2423 			if (parseprop(props))
2424 				return (1);
2425 			break;
2426 		case 'r':
2427 			recursive = B_TRUE;
2428 			break;
2429 		case '?':
2430 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2431 			    optopt);
2432 			goto usage;
2433 		}
2434 	}
2435 
2436 	argc -= optind;
2437 	argv += optind;
2438 
2439 	/* check number of arguments */
2440 	if (argc < 1) {
2441 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2442 		goto usage;
2443 	}
2444 	if (argc > 1) {
2445 		(void) fprintf(stderr, gettext("too many arguments\n"));
2446 		goto usage;
2447 	}
2448 
2449 	ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
2450 	nvlist_free(props);
2451 	if (ret && recursive)
2452 		(void) fprintf(stderr, gettext("no snapshots were created\n"));
2453 	return (ret != 0);
2454 
2455 usage:
2456 	nvlist_free(props);
2457 	usage(B_FALSE);
2458 	return (-1);
2459 }
2460 
2461 /*
2462  * zfs send [-v] -R [-i|-I <@snap>] <fs@snap>
2463  * zfs send [-v] [-i|-I <@snap>] <fs@snap>
2464  *
2465  * Send a backup stream to stdout.
2466  */
2467 static int
2468 zfs_do_send(int argc, char **argv)
2469 {
2470 	char *fromname = NULL;
2471 	char *toname = NULL;
2472 	char *cp;
2473 	zfs_handle_t *zhp;
2474 	boolean_t doall = B_FALSE;
2475 	boolean_t replicate = B_FALSE;
2476 	boolean_t fromorigin = B_FALSE;
2477 	boolean_t verbose = B_FALSE;
2478 	int c, err;
2479 
2480 	/* check options */
2481 	while ((c = getopt(argc, argv, ":i:I:Rv")) != -1) {
2482 		switch (c) {
2483 		case 'i':
2484 			if (fromname)
2485 				usage(B_FALSE);
2486 			fromname = optarg;
2487 			break;
2488 		case 'I':
2489 			if (fromname)
2490 				usage(B_FALSE);
2491 			fromname = optarg;
2492 			doall = B_TRUE;
2493 			break;
2494 		case 'R':
2495 			replicate = B_TRUE;
2496 			break;
2497 		case 'v':
2498 			verbose = B_TRUE;
2499 			break;
2500 		case ':':
2501 			(void) fprintf(stderr, gettext("missing argument for "
2502 			    "'%c' option\n"), optopt);
2503 			usage(B_FALSE);
2504 			break;
2505 		case '?':
2506 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2507 			    optopt);
2508 			usage(B_FALSE);
2509 		}
2510 	}
2511 
2512 	argc -= optind;
2513 	argv += optind;
2514 
2515 	/* check number of arguments */
2516 	if (argc < 1) {
2517 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2518 		usage(B_FALSE);
2519 	}
2520 	if (argc > 1) {
2521 		(void) fprintf(stderr, gettext("too many arguments\n"));
2522 		usage(B_FALSE);
2523 	}
2524 
2525 	if (isatty(STDOUT_FILENO)) {
2526 		(void) fprintf(stderr,
2527 		    gettext("Error: Stream can not be written to a terminal.\n"
2528 		    "You must redirect standard output.\n"));
2529 		return (1);
2530 	}
2531 
2532 	cp = strchr(argv[0], '@');
2533 	if (cp == NULL) {
2534 		(void) fprintf(stderr,
2535 		    gettext("argument must be a snapshot\n"));
2536 		usage(B_FALSE);
2537 	}
2538 	*cp = '\0';
2539 	toname = cp + 1;
2540 	zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2541 	if (zhp == NULL)
2542 		return (1);
2543 
2544 	/*
2545 	 * If they specified the full path to the snapshot, chop off
2546 	 * everything except the short name of the snapshot, but special
2547 	 * case if they specify the origin.
2548 	 */
2549 	if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2550 		char origin[ZFS_MAXNAMELEN];
2551 		zprop_source_t src;
2552 
2553 		(void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2554 		    origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2555 
2556 		if (strcmp(origin, fromname) == 0) {
2557 			fromname = NULL;
2558 			fromorigin = B_TRUE;
2559 		} else {
2560 			*cp = '\0';
2561 			if (cp != fromname && strcmp(argv[0], fromname)) {
2562 				(void) fprintf(stderr,
2563 				    gettext("incremental source must be "
2564 				    "in same filesystem\n"));
2565 				usage(B_FALSE);
2566 			}
2567 			fromname = cp + 1;
2568 			if (strchr(fromname, '@') || strchr(fromname, '/')) {
2569 				(void) fprintf(stderr,
2570 				    gettext("invalid incremental source\n"));
2571 				usage(B_FALSE);
2572 			}
2573 		}
2574 	}
2575 
2576 	if (replicate && fromname == NULL)
2577 		doall = B_TRUE;
2578 
2579 	err = zfs_send(zhp, fromname, toname, replicate, doall, fromorigin,
2580 	    verbose, STDOUT_FILENO);
2581 	zfs_close(zhp);
2582 
2583 	return (err != 0);
2584 }
2585 
2586 /*
2587  * zfs receive [-dnvF] <fs@snap>
2588  *
2589  * Restore a backup stream from stdin.
2590  */
2591 static int
2592 zfs_do_receive(int argc, char **argv)
2593 {
2594 	int c, err;
2595 	recvflags_t flags;
2596 
2597 	bzero(&flags, sizeof (recvflags_t));
2598 	/* check options */
2599 	while ((c = getopt(argc, argv, ":dnuvF")) != -1) {
2600 		switch (c) {
2601 		case 'd':
2602 			flags.isprefix = B_TRUE;
2603 			break;
2604 		case 'n':
2605 			flags.dryrun = B_TRUE;
2606 			break;
2607 		case 'u':
2608 			flags.nomount = B_TRUE;
2609 			break;
2610 		case 'v':
2611 			flags.verbose = B_TRUE;
2612 			break;
2613 		case 'F':
2614 			flags.force = B_TRUE;
2615 			break;
2616 		case ':':
2617 			(void) fprintf(stderr, gettext("missing argument for "
2618 			    "'%c' option\n"), optopt);
2619 			usage(B_FALSE);
2620 			break;
2621 		case '?':
2622 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2623 			    optopt);
2624 			usage(B_FALSE);
2625 		}
2626 	}
2627 
2628 	argc -= optind;
2629 	argv += optind;
2630 
2631 	/* check number of arguments */
2632 	if (argc < 1) {
2633 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
2634 		usage(B_FALSE);
2635 	}
2636 	if (argc > 1) {
2637 		(void) fprintf(stderr, gettext("too many arguments\n"));
2638 		usage(B_FALSE);
2639 	}
2640 
2641 	if (isatty(STDIN_FILENO)) {
2642 		(void) fprintf(stderr,
2643 		    gettext("Error: Backup stream can not be read "
2644 		    "from a terminal.\n"
2645 		    "You must redirect standard input.\n"));
2646 		return (1);
2647 	}
2648 
2649 	err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2650 
2651 	return (err != 0);
2652 }
2653 
2654 typedef struct get_all_cbdata {
2655 	zfs_handle_t	**cb_handles;
2656 	size_t		cb_alloc;
2657 	size_t		cb_used;
2658 	uint_t		cb_types;
2659 	boolean_t	cb_verbose;
2660 } get_all_cbdata_t;
2661 
2662 #define	CHECK_SPINNER 30
2663 #define	SPINNER_TIME 3		/* seconds */
2664 #define	MOUNT_TIME 5		/* seconds */
2665 
2666 static int
2667 get_one_dataset(zfs_handle_t *zhp, void *data)
2668 {
2669 	static char spin[] = { '-', '\\', '|', '/' };
2670 	static int spinval = 0;
2671 	static int spincheck = 0;
2672 	static time_t last_spin_time = (time_t)0;
2673 	get_all_cbdata_t *cbp = data;
2674 	zfs_type_t type = zfs_get_type(zhp);
2675 
2676 	if (cbp->cb_verbose) {
2677 		if (--spincheck < 0) {
2678 			time_t now = time(NULL);
2679 			if (last_spin_time + SPINNER_TIME < now) {
2680 				(void) printf("\b%c", spin[spinval++ % 4]);
2681 				(void) fflush(stdout);
2682 				last_spin_time = now;
2683 			}
2684 			spincheck = CHECK_SPINNER;
2685 		}
2686 	}
2687 
2688 	/*
2689 	 * Interate over any nested datasets.
2690 	 */
2691 	if (type == ZFS_TYPE_FILESYSTEM &&
2692 	    zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2693 		zfs_close(zhp);
2694 		return (1);
2695 	}
2696 
2697 	/*
2698 	 * Skip any datasets whose type does not match.
2699 	 */
2700 	if ((type & cbp->cb_types) == 0) {
2701 		zfs_close(zhp);
2702 		return (0);
2703 	}
2704 
2705 	if (cbp->cb_alloc == cbp->cb_used) {
2706 		zfs_handle_t **handles;
2707 
2708 		if (cbp->cb_alloc == 0)
2709 			cbp->cb_alloc = 64;
2710 		else
2711 			cbp->cb_alloc *= 2;
2712 
2713 		handles = safe_malloc(cbp->cb_alloc * sizeof (void *));
2714 
2715 		if (cbp->cb_handles) {
2716 			bcopy(cbp->cb_handles, handles,
2717 			    cbp->cb_used * sizeof (void *));
2718 			free(cbp->cb_handles);
2719 		}
2720 
2721 		cbp->cb_handles = handles;
2722 	}
2723 
2724 	cbp->cb_handles[cbp->cb_used++] = zhp;
2725 
2726 	return (0);
2727 }
2728 
2729 static void
2730 get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count,
2731     boolean_t verbose)
2732 {
2733 	get_all_cbdata_t cb = { 0 };
2734 	cb.cb_types = types;
2735 	cb.cb_verbose = verbose;
2736 
2737 	if (verbose) {
2738 		(void) printf("%s: *", gettext("Reading ZFS config"));
2739 		(void) fflush(stdout);
2740 	}
2741 
2742 	(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
2743 
2744 	*dslist = cb.cb_handles;
2745 	*count = cb.cb_used;
2746 
2747 	if (verbose) {
2748 		(void) printf("\b%s\n", gettext("done."));
2749 	}
2750 }
2751 
2752 static int
2753 dataset_cmp(const void *a, const void *b)
2754 {
2755 	zfs_handle_t **za = (zfs_handle_t **)a;
2756 	zfs_handle_t **zb = (zfs_handle_t **)b;
2757 	char mounta[MAXPATHLEN];
2758 	char mountb[MAXPATHLEN];
2759 	boolean_t gota, gotb;
2760 
2761 	if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
2762 		verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
2763 		    sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
2764 	if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
2765 		verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
2766 		    sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
2767 
2768 	if (gota && gotb)
2769 		return (strcmp(mounta, mountb));
2770 
2771 	if (gota)
2772 		return (-1);
2773 	if (gotb)
2774 		return (1);
2775 
2776 	return (strcmp(zfs_get_name(a), zfs_get_name(b)));
2777 }
2778 
2779 /*
2780  * Generic callback for sharing or mounting filesystems.  Because the code is so
2781  * similar, we have a common function with an extra parameter to determine which
2782  * mode we are using.
2783  */
2784 #define	OP_SHARE	0x1
2785 #define	OP_MOUNT	0x2
2786 
2787 /*
2788  * Share or mount a dataset.
2789  */
2790 static int
2791 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
2792     boolean_t explicit, const char *options)
2793 {
2794 	char mountpoint[ZFS_MAXPROPLEN];
2795 	char shareopts[ZFS_MAXPROPLEN];
2796 	char smbshareopts[ZFS_MAXPROPLEN];
2797 	const char *cmdname = op == OP_SHARE ? "share" : "mount";
2798 	struct mnttab mnt;
2799 	uint64_t zoned, canmount;
2800 	zfs_type_t type = zfs_get_type(zhp);
2801 	boolean_t shared_nfs, shared_smb;
2802 
2803 	assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME));
2804 
2805 	if (type == ZFS_TYPE_FILESYSTEM) {
2806 		/*
2807 		 * Check to make sure we can mount/share this dataset.  If we
2808 		 * are in the global zone and the filesystem is exported to a
2809 		 * local zone, or if we are in a local zone and the
2810 		 * filesystem is not exported, then it is an error.
2811 		 */
2812 		zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2813 
2814 		if (zoned && getzoneid() == GLOBAL_ZONEID) {
2815 			if (!explicit)
2816 				return (0);
2817 
2818 			(void) fprintf(stderr, gettext("cannot %s '%s': "
2819 			    "dataset is exported to a local zone\n"), cmdname,
2820 			    zfs_get_name(zhp));
2821 			return (1);
2822 
2823 		} else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
2824 			if (!explicit)
2825 				return (0);
2826 
2827 			(void) fprintf(stderr, gettext("cannot %s '%s': "
2828 			    "permission denied\n"), cmdname,
2829 			    zfs_get_name(zhp));
2830 			return (1);
2831 		}
2832 
2833 		/*
2834 		 * Ignore any filesystems which don't apply to us. This
2835 		 * includes those with a legacy mountpoint, or those with
2836 		 * legacy share options.
2837 		 */
2838 		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
2839 		    sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
2840 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
2841 		    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
2842 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
2843 		    sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
2844 
2845 		if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
2846 		    strcmp(smbshareopts, "off") == 0) {
2847 			if (!explicit)
2848 				return (0);
2849 
2850 			(void) fprintf(stderr, gettext("cannot share '%s': "
2851 			    "legacy share\n"), zfs_get_name(zhp));
2852 			(void) fprintf(stderr, gettext("use share(1M) to "
2853 			    "share this filesystem, or set "
2854 			    "sharenfs property on\n"));
2855 			return (1);
2856 		}
2857 
2858 		/*
2859 		 * We cannot share or mount legacy filesystems. If the
2860 		 * shareopts is non-legacy but the mountpoint is legacy, we
2861 		 * treat it as a legacy share.
2862 		 */
2863 		if (strcmp(mountpoint, "legacy") == 0) {
2864 			if (!explicit)
2865 				return (0);
2866 
2867 			(void) fprintf(stderr, gettext("cannot %s '%s': "
2868 			    "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
2869 			(void) fprintf(stderr, gettext("use %s(1M) to "
2870 			    "%s this filesystem\n"), cmdname, cmdname);
2871 			return (1);
2872 		}
2873 
2874 		if (strcmp(mountpoint, "none") == 0) {
2875 			if (!explicit)
2876 				return (0);
2877 
2878 			(void) fprintf(stderr, gettext("cannot %s '%s': no "
2879 			    "mountpoint set\n"), cmdname, zfs_get_name(zhp));
2880 			return (1);
2881 		}
2882 
2883 		/*
2884 		 * canmount	explicit	outcome
2885 		 * on		no		pass through
2886 		 * on		yes		pass through
2887 		 * off		no		return 0
2888 		 * off		yes		display error, return 1
2889 		 * noauto	no		return 0
2890 		 * noauto	yes		pass through
2891 		 */
2892 		canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
2893 		if (canmount == ZFS_CANMOUNT_OFF) {
2894 			if (!explicit)
2895 				return (0);
2896 
2897 			(void) fprintf(stderr, gettext("cannot %s '%s': "
2898 			    "'canmount' property is set to 'off'\n"), cmdname,
2899 			    zfs_get_name(zhp));
2900 			return (1);
2901 		} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
2902 			return (0);
2903 		}
2904 
2905 		/*
2906 		 * At this point, we have verified that the mountpoint and/or
2907 		 * shareopts are appropriate for auto management. If the
2908 		 * filesystem is already mounted or shared, return (failing
2909 		 * for explicit requests); otherwise mount or share the
2910 		 * filesystem.
2911 		 */
2912 		switch (op) {
2913 		case OP_SHARE:
2914 
2915 			shared_nfs = zfs_is_shared_nfs(zhp, NULL);
2916 			shared_smb = zfs_is_shared_smb(zhp, NULL);
2917 
2918 			if (shared_nfs && shared_smb ||
2919 			    (shared_nfs && strcmp(shareopts, "on") == 0 &&
2920 			    strcmp(smbshareopts, "off") == 0) ||
2921 			    (shared_smb && strcmp(smbshareopts, "on") == 0 &&
2922 			    strcmp(shareopts, "off") == 0)) {
2923 				if (!explicit)
2924 					return (0);
2925 
2926 				(void) fprintf(stderr, gettext("cannot share "
2927 				    "'%s': filesystem already shared\n"),
2928 				    zfs_get_name(zhp));
2929 				return (1);
2930 			}
2931 
2932 			if (!zfs_is_mounted(zhp, NULL) &&
2933 			    zfs_mount(zhp, NULL, 0) != 0)
2934 				return (1);
2935 
2936 			if (protocol == NULL) {
2937 				if (zfs_shareall(zhp) != 0)
2938 					return (1);
2939 			} else if (strcmp(protocol, "nfs") == 0) {
2940 				if (zfs_share_nfs(zhp))
2941 					return (1);
2942 			} else if (strcmp(protocol, "smb") == 0) {
2943 				if (zfs_share_smb(zhp))
2944 					return (1);
2945 			} else {
2946 				(void) fprintf(stderr, gettext("cannot share "
2947 				    "'%s': invalid share type '%s' "
2948 				    "specified\n"),
2949 				    zfs_get_name(zhp), protocol);
2950 				return (1);
2951 			}
2952 
2953 			break;
2954 
2955 		case OP_MOUNT:
2956 			if (options == NULL)
2957 				mnt.mnt_mntopts = "";
2958 			else
2959 				mnt.mnt_mntopts = (char *)options;
2960 
2961 			if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
2962 			    zfs_is_mounted(zhp, NULL)) {
2963 				if (!explicit)
2964 					return (0);
2965 
2966 				(void) fprintf(stderr, gettext("cannot mount "
2967 				    "'%s': filesystem already mounted\n"),
2968 				    zfs_get_name(zhp));
2969 				return (1);
2970 			}
2971 
2972 			if (zfs_mount(zhp, options, flags) != 0)
2973 				return (1);
2974 			break;
2975 		}
2976 	} else {
2977 		assert(op == OP_SHARE);
2978 
2979 		/*
2980 		 * Ignore any volumes that aren't shared.
2981 		 */
2982 		verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
2983 		    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
2984 
2985 		if (strcmp(shareopts, "off") == 0) {
2986 			if (!explicit)
2987 				return (0);
2988 
2989 			(void) fprintf(stderr, gettext("cannot share '%s': "
2990 			    "'shareiscsi' property not set\n"),
2991 			    zfs_get_name(zhp));
2992 			(void) fprintf(stderr, gettext("set 'shareiscsi' "
2993 			    "property or use iscsitadm(1M) to share this "
2994 			    "volume\n"));
2995 			return (1);
2996 		}
2997 
2998 		if (zfs_is_shared_iscsi(zhp)) {
2999 			if (!explicit)
3000 				return (0);
3001 
3002 			(void) fprintf(stderr, gettext("cannot share "
3003 			    "'%s': volume already shared\n"),
3004 			    zfs_get_name(zhp));
3005 			return (1);
3006 		}
3007 
3008 		if (zfs_share_iscsi(zhp) != 0)
3009 			return (1);
3010 	}
3011 
3012 	return (0);
3013 }
3014 
3015 /*
3016  * Reports progress in the form "(current/total)".  Not thread-safe.
3017  */
3018 static void
3019 report_mount_progress(int current, int total)
3020 {
3021 	static int len;
3022 	static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
3023 	    "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
3024 	static time_t last_progress_time;
3025 	time_t now = time(NULL);
3026 
3027 	/* report 1..n instead of 0..n-1 */
3028 	++current;
3029 
3030 	/* display header if we're here for the first time */
3031 	if (current == 1) {
3032 		(void) printf(gettext("Mounting ZFS filesystems: "));
3033 		len = 0;
3034 	} else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3035 		/* too soon to report again */
3036 		return;
3037 	}
3038 
3039 	last_progress_time = now;
3040 
3041 	/* back up to prepare for overwriting */
3042 	if (len)
3043 		(void) printf("%*.*s", len, len, reverse);
3044 
3045 	/* We put a newline at the end if this is the last one.  */
3046 	len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
3047 	(void) fflush(stdout);
3048 }
3049 
3050 static void
3051 append_options(char *mntopts, char *newopts)
3052 {
3053 	int len = strlen(mntopts);
3054 
3055 	/* original length plus new string to append plus 1 for the comma */
3056 	if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3057 		(void) fprintf(stderr, gettext("the opts argument for "
3058 		    "'%c' option is too long (more than %d chars)\n"),
3059 		    "-o", MNT_LINE_MAX);
3060 		usage(B_FALSE);
3061 	}
3062 
3063 	if (*mntopts)
3064 		mntopts[len++] = ',';
3065 
3066 	(void) strcpy(&mntopts[len], newopts);
3067 }
3068 
3069 static int
3070 share_mount(int op, int argc, char **argv)
3071 {
3072 	int do_all = 0;
3073 	boolean_t verbose = B_FALSE;
3074 	int c, ret = 0;
3075 	char *options = NULL;
3076 	int types, flags = 0;
3077 
3078 	/* check options */
3079 	while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3080 	    != -1) {
3081 		switch (c) {
3082 		case 'a':
3083 			do_all = 1;
3084 			break;
3085 		case 'v':
3086 			verbose = B_TRUE;
3087 			break;
3088 		case 'o':
3089 			if (*optarg == '\0') {
3090 				(void) fprintf(stderr, gettext("empty mount "
3091 				    "options (-o) specified\n"));
3092 				usage(B_FALSE);
3093 			}
3094 
3095 			if (options == NULL)
3096 				options = safe_malloc(MNT_LINE_MAX + 1);
3097 
3098 			/* option validation is done later */
3099 			append_options(options, optarg);
3100 			break;
3101 
3102 		case 'O':
3103 			flags |= MS_OVERLAY;
3104 			break;
3105 		case ':':
3106 			(void) fprintf(stderr, gettext("missing argument for "
3107 			    "'%c' option\n"), optopt);
3108 			usage(B_FALSE);
3109 			break;
3110 		case '?':
3111 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3112 			    optopt);
3113 			usage(B_FALSE);
3114 		}
3115 	}
3116 
3117 	argc -= optind;
3118 	argv += optind;
3119 
3120 	/* check number of arguments */
3121 	if (do_all) {
3122 		zfs_handle_t **dslist = NULL;
3123 		size_t i, count = 0;
3124 		char *protocol = NULL;
3125 
3126 		if (op == OP_MOUNT) {
3127 			types = ZFS_TYPE_FILESYSTEM;
3128 		} else if (argc > 0) {
3129 			if (strcmp(argv[0], "nfs") == 0 ||
3130 			    strcmp(argv[0], "smb") == 0) {
3131 				types = ZFS_TYPE_FILESYSTEM;
3132 			} else if (strcmp(argv[0], "iscsi") == 0) {
3133 				types = ZFS_TYPE_VOLUME;
3134 			} else {
3135 				(void) fprintf(stderr, gettext("share type "
3136 				    "must be 'nfs', 'smb' or 'iscsi'\n"));
3137 				usage(B_FALSE);
3138 			}
3139 			protocol = argv[0];
3140 			argc--;
3141 			argv++;
3142 		} else {
3143 			types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3144 		}
3145 
3146 		if (argc != 0) {
3147 			(void) fprintf(stderr, gettext("too many arguments\n"));
3148 			usage(B_FALSE);
3149 		}
3150 
3151 		get_all_datasets(types, &dslist, &count, verbose);
3152 
3153 		if (count == 0)
3154 			return (0);
3155 
3156 		qsort(dslist, count, sizeof (void *), dataset_cmp);
3157 
3158 		for (i = 0; i < count; i++) {
3159 			if (verbose)
3160 				report_mount_progress(i, count);
3161 
3162 			if (share_mount_one(dslist[i], op, flags, protocol,
3163 			    B_FALSE, options) != 0)
3164 				ret = 1;
3165 			zfs_close(dslist[i]);
3166 		}
3167 
3168 		free(dslist);
3169 	} else if (argc == 0) {
3170 		struct mnttab entry;
3171 
3172 		if ((op == OP_SHARE) || (options != NULL)) {
3173 			(void) fprintf(stderr, gettext("missing filesystem "
3174 			    "argument (specify -a for all)\n"));
3175 			usage(B_FALSE);
3176 		}
3177 
3178 		/*
3179 		 * When mount is given no arguments, go through /etc/mnttab and
3180 		 * display any active ZFS mounts.  We hide any snapshots, since
3181 		 * they are controlled automatically.
3182 		 */
3183 		rewind(mnttab_file);
3184 		while (getmntent(mnttab_file, &entry) == 0) {
3185 			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3186 			    strchr(entry.mnt_special, '@') != NULL)
3187 				continue;
3188 
3189 			(void) printf("%-30s  %s\n", entry.mnt_special,
3190 			    entry.mnt_mountp);
3191 		}
3192 
3193 	} else {
3194 		zfs_handle_t *zhp;
3195 
3196 		types = ZFS_TYPE_FILESYSTEM;
3197 		if (op == OP_SHARE)
3198 			types |= ZFS_TYPE_VOLUME;
3199 
3200 		if (argc > 1) {
3201 			(void) fprintf(stderr,
3202 			    gettext("too many arguments\n"));
3203 			usage(B_FALSE);
3204 		}
3205 
3206 		if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) {
3207 			ret = 1;
3208 		} else {
3209 			ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3210 			    options);
3211 			zfs_close(zhp);
3212 		}
3213 	}
3214 
3215 	return (ret);
3216 }
3217 
3218 /*
3219  * zfs mount -a [nfs | iscsi]
3220  * zfs mount filesystem
3221  *
3222  * Mount all filesystems, or mount the given filesystem.
3223  */
3224 static int
3225 zfs_do_mount(int argc, char **argv)
3226 {
3227 	return (share_mount(OP_MOUNT, argc, argv));
3228 }
3229 
3230 /*
3231  * zfs share -a [nfs | iscsi | smb]
3232  * zfs share filesystem
3233  *
3234  * Share all filesystems, or share the given filesystem.
3235  */
3236 static int
3237 zfs_do_share(int argc, char **argv)
3238 {
3239 	return (share_mount(OP_SHARE, argc, argv));
3240 }
3241 
3242 typedef struct unshare_unmount_node {
3243 	zfs_handle_t	*un_zhp;
3244 	char		*un_mountp;
3245 	uu_avl_node_t	un_avlnode;
3246 } unshare_unmount_node_t;
3247 
3248 /* ARGSUSED */
3249 static int
3250 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3251 {
3252 	const unshare_unmount_node_t *l = larg;
3253 	const unshare_unmount_node_t *r = rarg;
3254 
3255 	return (strcmp(l->un_mountp, r->un_mountp));
3256 }
3257 
3258 /*
3259  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3260  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3261  * and unmount it appropriately.
3262  */
3263 static int
3264 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3265 {
3266 	zfs_handle_t *zhp;
3267 	int ret;
3268 	struct stat64 statbuf;
3269 	struct extmnttab entry;
3270 	const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3271 	ino_t path_inode;
3272 
3273 	/*
3274 	 * Search for the path in /etc/mnttab.  Rather than looking for the
3275 	 * specific path, which can be fooled by non-standard paths (i.e. ".."
3276 	 * or "//"), we stat() the path and search for the corresponding
3277 	 * (major,minor) device pair.
3278 	 */
3279 	if (stat64(path, &statbuf) != 0) {
3280 		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3281 		    cmdname, path, strerror(errno));
3282 		return (1);
3283 	}
3284 	path_inode = statbuf.st_ino;
3285 
3286 	/*
3287 	 * Search for the given (major,minor) pair in the mount table.
3288 	 */
3289 	rewind(mnttab_file);
3290 	while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3291 		if (entry.mnt_major == major(statbuf.st_dev) &&
3292 		    entry.mnt_minor == minor(statbuf.st_dev))
3293 			break;
3294 	}
3295 	if (ret != 0) {
3296 		if (op == OP_SHARE) {
3297 			(void) fprintf(stderr, gettext("cannot %s '%s': not "
3298 			    "currently mounted\n"), cmdname, path);
3299 			return (1);
3300 		}
3301 		(void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3302 		    path);
3303 		if ((ret = umount2(path, flags)) != 0)
3304 			(void) fprintf(stderr, gettext("%s: %s\n"), path,
3305 			    strerror(errno));
3306 		return (ret != 0);
3307 	}
3308 
3309 	if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3310 		(void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3311 		    "filesystem\n"), cmdname, path);
3312 		return (1);
3313 	}
3314 
3315 	if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3316 	    ZFS_TYPE_FILESYSTEM)) == NULL)
3317 		return (1);
3318 
3319 	ret = 1;
3320 	if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3321 		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3322 		    cmdname, path, strerror(errno));
3323 		goto out;
3324 	} else if (statbuf.st_ino != path_inode) {
3325 		(void) fprintf(stderr, gettext("cannot "
3326 		    "%s '%s': not a mountpoint\n"), cmdname, path);
3327 		goto out;
3328 	}
3329 
3330 	if (op == OP_SHARE) {
3331 		char nfs_mnt_prop[ZFS_MAXPROPLEN];
3332 		char smbshare_prop[ZFS_MAXPROPLEN];
3333 
3334 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3335 		    sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3336 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3337 		    sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3338 
3339 		if (strcmp(nfs_mnt_prop, "off") == 0 &&
3340 		    strcmp(smbshare_prop, "off") == 0) {
3341 			(void) fprintf(stderr, gettext("cannot unshare "
3342 			    "'%s': legacy share\n"), path);
3343 			(void) fprintf(stderr, gettext("use "
3344 			    "unshare(1M) to unshare this filesystem\n"));
3345 		} else if (!zfs_is_shared(zhp)) {
3346 			(void) fprintf(stderr, gettext("cannot unshare '%s': "
3347 			    "not currently shared\n"), path);
3348 		} else {
3349 			ret = zfs_unshareall_bypath(zhp, path);
3350 		}
3351 	} else {
3352 		char mtpt_prop[ZFS_MAXPROPLEN];
3353 
3354 		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3355 		    sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3356 
3357 		if (is_manual) {
3358 			ret = zfs_unmount(zhp, NULL, flags);
3359 		} else if (strcmp(mtpt_prop, "legacy") == 0) {
3360 			(void) fprintf(stderr, gettext("cannot unmount "
3361 			    "'%s': legacy mountpoint\n"),
3362 			    zfs_get_name(zhp));
3363 			(void) fprintf(stderr, gettext("use umount(1M) "
3364 			    "to unmount this filesystem\n"));
3365 		} else {
3366 			ret = zfs_unmountall(zhp, flags);
3367 		}
3368 	}
3369 
3370 out:
3371 	zfs_close(zhp);
3372 
3373 	return (ret != 0);
3374 }
3375 
3376 /*
3377  * Generic callback for unsharing or unmounting a filesystem.
3378  */
3379 static int
3380 unshare_unmount(int op, int argc, char **argv)
3381 {
3382 	int do_all = 0;
3383 	int flags = 0;
3384 	int ret = 0;
3385 	int types, c;
3386 	zfs_handle_t *zhp;
3387 	char nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
3388 	char sharesmb[ZFS_MAXPROPLEN];
3389 
3390 	/* check options */
3391 	while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3392 		switch (c) {
3393 		case 'a':
3394 			do_all = 1;
3395 			break;
3396 		case 'f':
3397 			flags = MS_FORCE;
3398 			break;
3399 		case '?':
3400 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3401 			    optopt);
3402 			usage(B_FALSE);
3403 		}
3404 	}
3405 
3406 	argc -= optind;
3407 	argv += optind;
3408 
3409 	if (do_all) {
3410 		/*
3411 		 * We could make use of zfs_for_each() to walk all datasets in
3412 		 * the system, but this would be very inefficient, especially
3413 		 * since we would have to linearly search /etc/mnttab for each
3414 		 * one.  Instead, do one pass through /etc/mnttab looking for
3415 		 * zfs entries and call zfs_unmount() for each one.
3416 		 *
3417 		 * Things get a little tricky if the administrator has created
3418 		 * mountpoints beneath other ZFS filesystems.  In this case, we
3419 		 * have to unmount the deepest filesystems first.  To accomplish
3420 		 * this, we place all the mountpoints in an AVL tree sorted by
3421 		 * the special type (dataset name), and walk the result in
3422 		 * reverse to make sure to get any snapshots first.
3423 		 */
3424 		struct mnttab entry;
3425 		uu_avl_pool_t *pool;
3426 		uu_avl_t *tree;
3427 		unshare_unmount_node_t *node;
3428 		uu_avl_index_t idx;
3429 		uu_avl_walk_t *walk;
3430 
3431 		if (argc != 0) {
3432 			(void) fprintf(stderr, gettext("too many arguments\n"));
3433 			usage(B_FALSE);
3434 		}
3435 
3436 		if ((pool = uu_avl_pool_create("unmount_pool",
3437 		    sizeof (unshare_unmount_node_t),
3438 		    offsetof(unshare_unmount_node_t, un_avlnode),
3439 		    unshare_unmount_compare,
3440 		    UU_DEFAULT)) == NULL) {
3441 			(void) fprintf(stderr, gettext("internal error: "
3442 			    "out of memory\n"));
3443 			exit(1);
3444 		}
3445 
3446 		if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) {
3447 			(void) fprintf(stderr, gettext("internal error: "
3448 			    "out of memory\n"));
3449 			exit(1);
3450 		}
3451 
3452 		rewind(mnttab_file);
3453 		while (getmntent(mnttab_file, &entry) == 0) {
3454 
3455 			/* ignore non-ZFS entries */
3456 			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3457 				continue;
3458 
3459 			/* ignore snapshots */
3460 			if (strchr(entry.mnt_special, '@') != NULL)
3461 				continue;
3462 
3463 			if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3464 			    ZFS_TYPE_FILESYSTEM)) == NULL) {
3465 				ret = 1;
3466 				continue;
3467 			}
3468 
3469 			switch (op) {
3470 			case OP_SHARE:
3471 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3472 				    nfsiscsi_mnt_prop,
3473 				    sizeof (nfsiscsi_mnt_prop),
3474 				    NULL, NULL, 0, B_FALSE) == 0);
3475 				if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
3476 					break;
3477 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3478 				    nfsiscsi_mnt_prop,
3479 				    sizeof (nfsiscsi_mnt_prop),
3480 				    NULL, NULL, 0, B_FALSE) == 0);
3481 				if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
3482 					continue;
3483 				break;
3484 			case OP_MOUNT:
3485 				/* Ignore legacy mounts */
3486 				verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3487 				    nfsiscsi_mnt_prop,
3488 				    sizeof (nfsiscsi_mnt_prop),
3489 				    NULL, NULL, 0, B_FALSE) == 0);
3490 				if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
3491 					continue;
3492 				/* Ignore canmount=noauto mounts */
3493 				if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3494 				    ZFS_CANMOUNT_NOAUTO)
3495 					continue;
3496 			default:
3497 				break;
3498 			}
3499 
3500 			node = safe_malloc(sizeof (unshare_unmount_node_t));
3501 			node->un_zhp = zhp;
3502 
3503 			if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
3504 			    NULL) {
3505 				(void) fprintf(stderr, gettext("internal error:"
3506 				    " out of memory\n"));
3507 				exit(1);
3508 			}
3509 
3510 			uu_avl_node_init(node, &node->un_avlnode, pool);
3511 
3512 			if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3513 				uu_avl_insert(tree, node, idx);
3514 			} else {
3515 				zfs_close(node->un_zhp);
3516 				free(node->un_mountp);
3517 				free(node);
3518 			}
3519 		}
3520 
3521 		/*
3522 		 * Walk the AVL tree in reverse, unmounting each filesystem and
3523 		 * removing it from the AVL tree in the process.
3524 		 */
3525 		if ((walk = uu_avl_walk_start(tree,
3526 		    UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) {
3527 			(void) fprintf(stderr,
3528 			    gettext("internal error: out of memory"));
3529 			exit(1);
3530 		}
3531 
3532 		while ((node = uu_avl_walk_next(walk)) != NULL) {
3533 			uu_avl_remove(tree, node);
3534 
3535 			switch (op) {
3536 			case OP_SHARE:
3537 				if (zfs_unshareall_bypath(node->un_zhp,
3538 				    node->un_mountp) != 0)
3539 					ret = 1;
3540 				break;
3541 
3542 			case OP_MOUNT:
3543 				if (zfs_unmount(node->un_zhp,
3544 				    node->un_mountp, flags) != 0)
3545 					ret = 1;
3546 				break;
3547 			}
3548 
3549 			zfs_close(node->un_zhp);
3550 			free(node->un_mountp);
3551 			free(node);
3552 		}
3553 
3554 		uu_avl_walk_end(walk);
3555 		uu_avl_destroy(tree);
3556 		uu_avl_pool_destroy(pool);
3557 
3558 		if (op == OP_SHARE) {
3559 			/*
3560 			 * Finally, unshare any volumes shared via iSCSI.
3561 			 */
3562 			zfs_handle_t **dslist = NULL;
3563 			size_t i, count = 0;
3564 
3565 			get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count,
3566 			    B_FALSE);
3567 
3568 			if (count != 0) {
3569 				qsort(dslist, count, sizeof (void *),
3570 				    dataset_cmp);
3571 
3572 				for (i = 0; i < count; i++) {
3573 					if (zfs_unshare_iscsi(dslist[i]) != 0)
3574 						ret = 1;
3575 					zfs_close(dslist[i]);
3576 				}
3577 
3578 				free(dslist);
3579 			}
3580 		}
3581 	} else {
3582 		if (argc != 1) {
3583 			if (argc == 0)
3584 				(void) fprintf(stderr,
3585 				    gettext("missing filesystem argument\n"));
3586 			else
3587 				(void) fprintf(stderr,
3588 				    gettext("too many arguments\n"));
3589 			usage(B_FALSE);
3590 		}
3591 
3592 		/*
3593 		 * We have an argument, but it may be a full path or a ZFS
3594 		 * filesystem.  Pass full paths off to unmount_path() (shared by
3595 		 * manual_unmount), otherwise open the filesystem and pass to
3596 		 * zfs_unmount().
3597 		 */
3598 		if (argv[0][0] == '/')
3599 			return (unshare_unmount_path(op, argv[0],
3600 			    flags, B_FALSE));
3601 
3602 		types = ZFS_TYPE_FILESYSTEM;
3603 		if (op == OP_SHARE)
3604 			types |= ZFS_TYPE_VOLUME;
3605 
3606 		if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3607 			return (1);
3608 
3609 		if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
3610 			verify(zfs_prop_get(zhp, op == OP_SHARE ?
3611 			    ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3612 			    nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
3613 			    NULL, 0, B_FALSE) == 0);
3614 
3615 			switch (op) {
3616 			case OP_SHARE:
3617 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3618 				    nfsiscsi_mnt_prop,
3619 				    sizeof (nfsiscsi_mnt_prop),
3620 				    NULL, NULL, 0, B_FALSE) == 0);
3621 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3622 				    sharesmb, sizeof (sharesmb), NULL, NULL,
3623 				    0, B_FALSE) == 0);
3624 
3625 				if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
3626 				    strcmp(sharesmb, "off") == 0) {
3627 					(void) fprintf(stderr, gettext("cannot "
3628 					    "unshare '%s': legacy share\n"),
3629 					    zfs_get_name(zhp));
3630 					(void) fprintf(stderr, gettext("use "
3631 					    "unshare(1M) to unshare this "
3632 					    "filesystem\n"));
3633 					ret = 1;
3634 				} else if (!zfs_is_shared(zhp)) {
3635 					(void) fprintf(stderr, gettext("cannot "
3636 					    "unshare '%s': not currently "
3637 					    "shared\n"), zfs_get_name(zhp));
3638 					ret = 1;
3639 				} else if (zfs_unshareall(zhp) != 0) {
3640 					ret = 1;
3641 				}
3642 				break;
3643 
3644 			case OP_MOUNT:
3645 				if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0) {
3646 					(void) fprintf(stderr, gettext("cannot "
3647 					    "unmount '%s': legacy "
3648 					    "mountpoint\n"), zfs_get_name(zhp));
3649 					(void) fprintf(stderr, gettext("use "
3650 					    "umount(1M) to unmount this "
3651 					    "filesystem\n"));
3652 					ret = 1;
3653 				} else if (!zfs_is_mounted(zhp, NULL)) {
3654 					(void) fprintf(stderr, gettext("cannot "
3655 					    "unmount '%s': not currently "
3656 					    "mounted\n"),
3657 					    zfs_get_name(zhp));
3658 					ret = 1;
3659 				} else if (zfs_unmountall(zhp, flags) != 0) {
3660 					ret = 1;
3661 				}
3662 				break;
3663 			}
3664 		} else {
3665 			assert(op == OP_SHARE);
3666 
3667 			verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI,
3668 			    nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
3669 			    NULL, NULL, 0, B_FALSE) == 0);
3670 
3671 			if (strcmp(nfsiscsi_mnt_prop, "off") == 0) {
3672 				(void) fprintf(stderr, gettext("cannot unshare "
3673 				    "'%s': 'shareiscsi' property not set\n"),
3674 				    zfs_get_name(zhp));
3675 				(void) fprintf(stderr, gettext("set "
3676 				    "'shareiscsi' property or use "
3677 				    "iscsitadm(1M) to share this volume\n"));
3678 				ret = 1;
3679 			} else if (!zfs_is_shared_iscsi(zhp)) {
3680 				(void) fprintf(stderr, gettext("cannot "
3681 				    "unshare '%s': not currently shared\n"),
3682 				    zfs_get_name(zhp));
3683 				ret = 1;
3684 			} else if (zfs_unshare_iscsi(zhp) != 0) {
3685 				ret = 1;
3686 			}
3687 		}
3688 
3689 		zfs_close(zhp);
3690 	}
3691 
3692 	return (ret);
3693 }
3694 
3695 /*
3696  * zfs unmount -a
3697  * zfs unmount filesystem
3698  *
3699  * Unmount all filesystems, or a specific ZFS filesystem.
3700  */
3701 static int
3702 zfs_do_unmount(int argc, char **argv)
3703 {
3704 	return (unshare_unmount(OP_MOUNT, argc, argv));
3705 }
3706 
3707 /*
3708  * zfs unshare -a
3709  * zfs unshare filesystem
3710  *
3711  * Unshare all filesystems, or a specific ZFS filesystem.
3712  */
3713 static int
3714 zfs_do_unshare(int argc, char **argv)
3715 {
3716 	return (unshare_unmount(OP_SHARE, argc, argv));
3717 }
3718 
3719 /* ARGSUSED */
3720 static int
3721 zfs_do_python(int argc, char **argv)
3722 {
3723 	(void) execv(pypath, argv-1);
3724 	(void) printf("internal error: %s not found\n", pypath);
3725 	return (-1);
3726 }
3727 
3728 /*
3729  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3730  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3731  */
3732 static int
3733 manual_mount(int argc, char **argv)
3734 {
3735 	zfs_handle_t *zhp;
3736 	char mountpoint[ZFS_MAXPROPLEN];
3737 	char mntopts[MNT_LINE_MAX] = { '\0' };
3738 	int ret;
3739 	int c;
3740 	int flags = 0;
3741 	char *dataset, *path;
3742 
3743 	/* check options */
3744 	while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3745 		switch (c) {
3746 		case 'o':
3747 			(void) strlcpy(mntopts, optarg, sizeof (mntopts));
3748 			break;
3749 		case 'O':
3750 			flags |= MS_OVERLAY;
3751 			break;
3752 		case 'm':
3753 			flags |= MS_NOMNTTAB;
3754 			break;
3755 		case ':':
3756 			(void) fprintf(stderr, gettext("missing argument for "
3757 			    "'%c' option\n"), optopt);
3758 			usage(B_FALSE);
3759 			break;
3760 		case '?':
3761 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3762 			    optopt);
3763 			(void) fprintf(stderr, gettext("usage: mount [-o opts] "
3764 			    "<path>\n"));
3765 			return (2);
3766 		}
3767 	}
3768 
3769 	argc -= optind;
3770 	argv += optind;
3771 
3772 	/* check that we only have two arguments */
3773 	if (argc != 2) {
3774 		if (argc == 0)
3775 			(void) fprintf(stderr, gettext("missing dataset "
3776 			    "argument\n"));
3777 		else if (argc == 1)
3778 			(void) fprintf(stderr,
3779 			    gettext("missing mountpoint argument\n"));
3780 		else
3781 			(void) fprintf(stderr, gettext("too many arguments\n"));
3782 		(void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
3783 		return (2);
3784 	}
3785 
3786 	dataset = argv[0];
3787 	path = argv[1];
3788 
3789 	/* try to open the dataset */
3790 	if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
3791 		return (1);
3792 
3793 	(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3794 	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
3795 
3796 	/* check for legacy mountpoint and complain appropriately */
3797 	ret = 0;
3798 	if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
3799 		if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
3800 		    NULL, 0, mntopts, sizeof (mntopts)) != 0) {
3801 			(void) fprintf(stderr, gettext("mount failed: %s\n"),
3802 			    strerror(errno));
3803 			ret = 1;
3804 		}
3805 	} else {
3806 		(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
3807 		    "mounted using 'mount -F zfs'\n"), dataset);
3808 		(void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
3809 		    "instead.\n"), path);
3810 		(void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
3811 		    "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
3812 		(void) fprintf(stderr, gettext("See zfs(1M) for more "
3813 		    "information.\n"));
3814 		ret = 1;
3815 	}
3816 
3817 	return (ret);
3818 }
3819 
3820 /*
3821  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
3822  * unmounts of non-legacy filesystems, as this is the dominant administrative
3823  * interface.
3824  */
3825 static int
3826 manual_unmount(int argc, char **argv)
3827 {
3828 	int flags = 0;
3829 	int c;
3830 
3831 	/* check options */
3832 	while ((c = getopt(argc, argv, "f")) != -1) {
3833 		switch (c) {
3834 		case 'f':
3835 			flags = MS_FORCE;
3836 			break;
3837 		case '?':
3838 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3839 			    optopt);
3840 			(void) fprintf(stderr, gettext("usage: unmount [-f] "
3841 			    "<path>\n"));
3842 			return (2);
3843 		}
3844 	}
3845 
3846 	argc -= optind;
3847 	argv += optind;
3848 
3849 	/* check arguments */
3850 	if (argc != 1) {
3851 		if (argc == 0)
3852 			(void) fprintf(stderr, gettext("missing path "
3853 			    "argument\n"));
3854 		else
3855 			(void) fprintf(stderr, gettext("too many arguments\n"));
3856 		(void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
3857 		return (2);
3858 	}
3859 
3860 	return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
3861 }
3862 
3863 static int
3864 volcheck(zpool_handle_t *zhp, void *data)
3865 {
3866 	boolean_t isinit = *((boolean_t *)data);
3867 
3868 	if (isinit)
3869 		return (zpool_create_zvol_links(zhp));
3870 	else
3871 		return (zpool_remove_zvol_links(zhp));
3872 }
3873 
3874 /*
3875  * Iterate over all pools in the system and either create or destroy /dev/zvol
3876  * links, depending on the value of 'isinit'.
3877  */
3878 static int
3879 do_volcheck(boolean_t isinit)
3880 {
3881 	return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0);
3882 }
3883 
3884 static int
3885 find_command_idx(char *command, int *idx)
3886 {
3887 	int i;
3888 
3889 	for (i = 0; i < NCOMMAND; i++) {
3890 		if (command_table[i].name == NULL)
3891 			continue;
3892 
3893 		if (strcmp(command, command_table[i].name) == 0) {
3894 			*idx = i;
3895 			return (0);
3896 		}
3897 	}
3898 	return (1);
3899 }
3900 
3901 int
3902 main(int argc, char **argv)
3903 {
3904 	int ret;
3905 	int i;
3906 	char *progname;
3907 	char *cmdname;
3908 
3909 	(void) setlocale(LC_ALL, "");
3910 	(void) textdomain(TEXT_DOMAIN);
3911 
3912 	opterr = 0;
3913 
3914 	if ((g_zfs = libzfs_init()) == NULL) {
3915 		(void) fprintf(stderr, gettext("internal error: failed to "
3916 		    "initialize ZFS library\n"));
3917 		return (1);
3918 	}
3919 
3920 	zpool_set_history_str("zfs", argc, argv, history_str);
3921 	verify(zpool_stage_history(g_zfs, history_str) == 0);
3922 
3923 	libzfs_print_on_error(g_zfs, B_TRUE);
3924 
3925 	if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
3926 		(void) fprintf(stderr, gettext("internal error: unable to "
3927 		    "open %s\n"), MNTTAB);
3928 		return (1);
3929 	}
3930 
3931 	/*
3932 	 * This command also doubles as the /etc/fs mount and unmount program.
3933 	 * Determine if we should take this behavior based on argv[0].
3934 	 */
3935 	progname = basename(argv[0]);
3936 	if (strcmp(progname, "mount") == 0) {
3937 		ret = manual_mount(argc, argv);
3938 	} else if (strcmp(progname, "umount") == 0) {
3939 		ret = manual_unmount(argc, argv);
3940 	} else {
3941 		/*
3942 		 * Make sure the user has specified some command.
3943 		 */
3944 		if (argc < 2) {
3945 			(void) fprintf(stderr, gettext("missing command\n"));
3946 			usage(B_FALSE);
3947 		}
3948 
3949 		cmdname = argv[1];
3950 
3951 		/*
3952 		 * The 'umount' command is an alias for 'unmount'
3953 		 */
3954 		if (strcmp(cmdname, "umount") == 0)
3955 			cmdname = "unmount";
3956 
3957 		/*
3958 		 * The 'recv' command is an alias for 'receive'
3959 		 */
3960 		if (strcmp(cmdname, "recv") == 0)
3961 			cmdname = "receive";
3962 
3963 		/*
3964 		 * Special case '-?'
3965 		 */
3966 		if (strcmp(cmdname, "-?") == 0)
3967 			usage(B_TRUE);
3968 
3969 		/*
3970 		 * 'volinit' and 'volfini' do not appear in the usage message,
3971 		 * so we have to special case them here.
3972 		 */
3973 		if (strcmp(cmdname, "volinit") == 0)
3974 			return (do_volcheck(B_TRUE));
3975 		else if (strcmp(cmdname, "volfini") == 0)
3976 			return (do_volcheck(B_FALSE));
3977 
3978 		/*
3979 		 * Run the appropriate command.
3980 		 */
3981 		libzfs_mnttab_cache(g_zfs, B_TRUE);
3982 		if (find_command_idx(cmdname, &i) == 0) {
3983 			current_command = &command_table[i];
3984 			ret = command_table[i].func(argc - 1, argv + 1);
3985 		} else if (strchr(cmdname, '=') != NULL) {
3986 			verify(find_command_idx("set", &i) == 0);
3987 			current_command = &command_table[i];
3988 			ret = command_table[i].func(argc, argv);
3989 		} else {
3990 			(void) fprintf(stderr, gettext("unrecognized "
3991 			    "command '%s'\n"), cmdname);
3992 			usage(B_FALSE);
3993 		}
3994 		libzfs_mnttab_cache(g_zfs, B_FALSE);
3995 	}
3996 
3997 	(void) fclose(mnttab_file);
3998 
3999 	libzfs_fini(g_zfs);
4000 
4001 	/*
4002 	 * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4003 	 * for the purposes of running ::findleaks.
4004 	 */
4005 	if (getenv("ZFS_ABORT") != NULL) {
4006 		(void) printf("dumping core by request\n");
4007 		abort();
4008 	}
4009 
4010 	return (ret);
4011 }
4012