xref: /illumos-gate/usr/src/cmd/zfs/zfs_main.c (revision 05c998d610ab634d0b9d3f4c6e90d7e85f70b31f)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
25  * Copyright (c) 2011 by Delphix. All rights reserved.
26  */
27 
28 #include <assert.h>
29 #include <ctype.h>
30 #include <errno.h>
31 #include <libgen.h>
32 #include <libintl.h>
33 #include <libuutil.h>
34 #include <libnvpair.h>
35 #include <locale.h>
36 #include <stddef.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <strings.h>
40 #include <unistd.h>
41 #include <fcntl.h>
42 #include <zone.h>
43 #include <grp.h>
44 #include <pwd.h>
45 #include <signal.h>
46 #include <sys/list.h>
47 #include <sys/mkdev.h>
48 #include <sys/mntent.h>
49 #include <sys/mnttab.h>
50 #include <sys/mount.h>
51 #include <sys/stat.h>
52 #include <sys/fs/zfs.h>
53 #include <sys/types.h>
54 #include <time.h>
55 
56 #include <libzfs.h>
57 #include <zfs_prop.h>
58 #include <zfs_deleg.h>
59 #include <libuutil.h>
60 #include <aclutils.h>
61 #include <directory.h>
62 
63 #include "zfs_iter.h"
64 #include "zfs_util.h"
65 #include "zfs_comutil.h"
66 
67 libzfs_handle_t *g_zfs;
68 
69 static FILE *mnttab_file;
70 static char history_str[HIS_MAX_RECORD_LEN];
71 
72 static int zfs_do_clone(int argc, char **argv);
73 static int zfs_do_create(int argc, char **argv);
74 static int zfs_do_destroy(int argc, char **argv);
75 static int zfs_do_get(int argc, char **argv);
76 static int zfs_do_inherit(int argc, char **argv);
77 static int zfs_do_list(int argc, char **argv);
78 static int zfs_do_mount(int argc, char **argv);
79 static int zfs_do_rename(int argc, char **argv);
80 static int zfs_do_rollback(int argc, char **argv);
81 static int zfs_do_set(int argc, char **argv);
82 static int zfs_do_upgrade(int argc, char **argv);
83 static int zfs_do_snapshot(int argc, char **argv);
84 static int zfs_do_unmount(int argc, char **argv);
85 static int zfs_do_share(int argc, char **argv);
86 static int zfs_do_unshare(int argc, char **argv);
87 static int zfs_do_send(int argc, char **argv);
88 static int zfs_do_receive(int argc, char **argv);
89 static int zfs_do_promote(int argc, char **argv);
90 static int zfs_do_userspace(int argc, char **argv);
91 static int zfs_do_allow(int argc, char **argv);
92 static int zfs_do_unallow(int argc, char **argv);
93 static int zfs_do_hold(int argc, char **argv);
94 static int zfs_do_holds(int argc, char **argv);
95 static int zfs_do_release(int argc, char **argv);
96 static int zfs_do_diff(int argc, char **argv);
97 
98 /*
99  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
100  */
101 
102 #ifdef DEBUG
103 const char *
104 _umem_debug_init(void)
105 {
106 	return ("default,verbose"); /* $UMEM_DEBUG setting */
107 }
108 
109 const char *
110 _umem_logging_init(void)
111 {
112 	return ("fail,contents"); /* $UMEM_LOGGING setting */
113 }
114 #endif
115 
116 typedef enum {
117 	HELP_CLONE,
118 	HELP_CREATE,
119 	HELP_DESTROY,
120 	HELP_GET,
121 	HELP_INHERIT,
122 	HELP_UPGRADE,
123 	HELP_LIST,
124 	HELP_MOUNT,
125 	HELP_PROMOTE,
126 	HELP_RECEIVE,
127 	HELP_RENAME,
128 	HELP_ROLLBACK,
129 	HELP_SEND,
130 	HELP_SET,
131 	HELP_SHARE,
132 	HELP_SNAPSHOT,
133 	HELP_UNMOUNT,
134 	HELP_UNSHARE,
135 	HELP_ALLOW,
136 	HELP_UNALLOW,
137 	HELP_USERSPACE,
138 	HELP_GROUPSPACE,
139 	HELP_HOLD,
140 	HELP_HOLDS,
141 	HELP_RELEASE,
142 	HELP_DIFF,
143 } zfs_help_t;
144 
145 typedef struct zfs_command {
146 	const char	*name;
147 	int		(*func)(int argc, char **argv);
148 	zfs_help_t	usage;
149 } zfs_command_t;
150 
151 /*
152  * Master command table.  Each ZFS command has a name, associated function, and
153  * usage message.  The usage messages need to be internationalized, so we have
154  * to have a function to return the usage message based on a command index.
155  *
156  * These commands are organized according to how they are displayed in the usage
157  * message.  An empty command (one with a NULL name) indicates an empty line in
158  * the generic usage message.
159  */
160 static zfs_command_t command_table[] = {
161 	{ "create",	zfs_do_create,		HELP_CREATE		},
162 	{ "destroy",	zfs_do_destroy,		HELP_DESTROY		},
163 	{ NULL },
164 	{ "snapshot",	zfs_do_snapshot,	HELP_SNAPSHOT		},
165 	{ "rollback",	zfs_do_rollback,	HELP_ROLLBACK		},
166 	{ "clone",	zfs_do_clone,		HELP_CLONE		},
167 	{ "promote",	zfs_do_promote,		HELP_PROMOTE		},
168 	{ "rename",	zfs_do_rename,		HELP_RENAME		},
169 	{ NULL },
170 	{ "list",	zfs_do_list,		HELP_LIST		},
171 	{ NULL },
172 	{ "set",	zfs_do_set,		HELP_SET		},
173 	{ "get",	zfs_do_get,		HELP_GET		},
174 	{ "inherit",	zfs_do_inherit,		HELP_INHERIT		},
175 	{ "upgrade",	zfs_do_upgrade,		HELP_UPGRADE		},
176 	{ "userspace",	zfs_do_userspace,	HELP_USERSPACE		},
177 	{ "groupspace",	zfs_do_userspace,	HELP_GROUPSPACE		},
178 	{ NULL },
179 	{ "mount",	zfs_do_mount,		HELP_MOUNT		},
180 	{ "unmount",	zfs_do_unmount,		HELP_UNMOUNT		},
181 	{ "share",	zfs_do_share,		HELP_SHARE		},
182 	{ "unshare",	zfs_do_unshare,		HELP_UNSHARE		},
183 	{ NULL },
184 	{ "send",	zfs_do_send,		HELP_SEND		},
185 	{ "receive",	zfs_do_receive,		HELP_RECEIVE		},
186 	{ NULL },
187 	{ "allow",	zfs_do_allow,		HELP_ALLOW		},
188 	{ NULL },
189 	{ "unallow",	zfs_do_unallow,		HELP_UNALLOW		},
190 	{ NULL },
191 	{ "hold",	zfs_do_hold,		HELP_HOLD		},
192 	{ "holds",	zfs_do_holds,		HELP_HOLDS		},
193 	{ "release",	zfs_do_release,		HELP_RELEASE		},
194 	{ "diff",	zfs_do_diff,		HELP_DIFF		},
195 };
196 
197 #define	NCOMMAND	(sizeof (command_table) / sizeof (command_table[0]))
198 
199 zfs_command_t *current_command;
200 
201 static const char *
202 get_usage(zfs_help_t idx)
203 {
204 	switch (idx) {
205 	case HELP_CLONE:
206 		return (gettext("\tclone [-p] [-o property=value] ... "
207 		    "<snapshot> <filesystem|volume>\n"));
208 	case HELP_CREATE:
209 		return (gettext("\tcreate [-p] [-o property=value] ... "
210 		    "<filesystem>\n"
211 		    "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
212 		    "-V <size> <volume>\n"));
213 	case HELP_DESTROY:
214 		return (gettext("\tdestroy [-fnpRrv] <filesystem|volume>\n"
215 		    "\tdestroy [-dnpRrv] "
216 		    "<filesystem|volume>@<snap>[%<snap>][,...]\n"));
217 	case HELP_GET:
218 		return (gettext("\tget [-rHp] [-d max] "
219 		    "[-o \"all\" | field[,...]] [-s source[,...]]\n"
220 		    "\t    <\"all\" | property[,...]> "
221 		    "[filesystem|volume|snapshot] ...\n"));
222 	case HELP_INHERIT:
223 		return (gettext("\tinherit [-rS] <property> "
224 		    "<filesystem|volume|snapshot> ...\n"));
225 	case HELP_UPGRADE:
226 		return (gettext("\tupgrade [-v]\n"
227 		    "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
228 	case HELP_LIST:
229 		return (gettext("\tlist [-rH][-d max] "
230 		    "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
231 		    "\t    [-S property] ... "
232 		    "[filesystem|volume|snapshot] ...\n"));
233 	case HELP_MOUNT:
234 		return (gettext("\tmount\n"
235 		    "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
236 	case HELP_PROMOTE:
237 		return (gettext("\tpromote <clone-filesystem>\n"));
238 	case HELP_RECEIVE:
239 		return (gettext("\treceive [-vnFu] <filesystem|volume|"
240 		"snapshot>\n"
241 		"\treceive [-vnFu] [-d | -e] <filesystem>\n"));
242 	case HELP_RENAME:
243 		return (gettext("\trename <filesystem|volume|snapshot> "
244 		    "<filesystem|volume|snapshot>\n"
245 		    "\trename -p <filesystem|volume> <filesystem|volume>\n"
246 		    "\trename -r <snapshot> <snapshot>"));
247 	case HELP_ROLLBACK:
248 		return (gettext("\trollback [-rRf] <snapshot>\n"));
249 	case HELP_SEND:
250 		return (gettext("\tsend [-DnPpRrv] [-[iI] snapshot] "
251 		    "<snapshot>\n"));
252 	case HELP_SET:
253 		return (gettext("\tset <property=value> "
254 		    "<filesystem|volume|snapshot> ...\n"));
255 	case HELP_SHARE:
256 		return (gettext("\tshare <-a | filesystem>\n"));
257 	case HELP_SNAPSHOT:
258 		return (gettext("\tsnapshot [-r] [-o property=value] ... "
259 		    "<filesystem@snapname|volume@snapname>\n"));
260 	case HELP_UNMOUNT:
261 		return (gettext("\tunmount [-f] "
262 		    "<-a | filesystem|mountpoint>\n"));
263 	case HELP_UNSHARE:
264 		return (gettext("\tunshare "
265 		    "<-a | filesystem|mountpoint>\n"));
266 	case HELP_ALLOW:
267 		return (gettext("\tallow <filesystem|volume>\n"
268 		    "\tallow [-ldug] "
269 		    "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
270 		    "\t    <filesystem|volume>\n"
271 		    "\tallow [-ld] -e <perm|@setname>[,...] "
272 		    "<filesystem|volume>\n"
273 		    "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
274 		    "\tallow -s @setname <perm|@setname>[,...] "
275 		    "<filesystem|volume>\n"));
276 	case HELP_UNALLOW:
277 		return (gettext("\tunallow [-rldug] "
278 		    "<\"everyone\"|user|group>[,...]\n"
279 		    "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
280 		    "\tunallow [-rld] -e [<perm|@setname>[,...]] "
281 		    "<filesystem|volume>\n"
282 		    "\tunallow [-r] -c [<perm|@setname>[,...]] "
283 		    "<filesystem|volume>\n"
284 		    "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
285 		    "<filesystem|volume>\n"));
286 	case HELP_USERSPACE:
287 		return (gettext("\tuserspace [-hniHp] [-o field[,...]] "
288 		    "[-sS field] ... [-t type[,...]]\n"
289 		    "\t    <filesystem|snapshot>\n"));
290 	case HELP_GROUPSPACE:
291 		return (gettext("\tgroupspace [-hniHpU] [-o field[,...]] "
292 		    "[-sS field] ... [-t type[,...]]\n"
293 		    "\t    <filesystem|snapshot>\n"));
294 	case HELP_HOLD:
295 		return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
296 	case HELP_HOLDS:
297 		return (gettext("\tholds [-r] <snapshot> ...\n"));
298 	case HELP_RELEASE:
299 		return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
300 	case HELP_DIFF:
301 		return (gettext("\tdiff [-FHt] <snapshot> "
302 		    "[snapshot|filesystem]\n"));
303 	}
304 
305 	abort();
306 	/* NOTREACHED */
307 }
308 
309 void
310 nomem(void)
311 {
312 	(void) fprintf(stderr, gettext("internal error: out of memory\n"));
313 	exit(1);
314 }
315 
316 /*
317  * Utility function to guarantee malloc() success.
318  */
319 
320 void *
321 safe_malloc(size_t size)
322 {
323 	void *data;
324 
325 	if ((data = calloc(1, size)) == NULL)
326 		nomem();
327 
328 	return (data);
329 }
330 
331 static char *
332 safe_strdup(char *str)
333 {
334 	char *dupstr = strdup(str);
335 
336 	if (dupstr == NULL)
337 		nomem();
338 
339 	return (dupstr);
340 }
341 
342 /*
343  * Callback routine that will print out information for each of
344  * the properties.
345  */
346 static int
347 usage_prop_cb(int prop, void *cb)
348 {
349 	FILE *fp = cb;
350 
351 	(void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
352 
353 	if (zfs_prop_readonly(prop))
354 		(void) fprintf(fp, " NO    ");
355 	else
356 		(void) fprintf(fp, "YES    ");
357 
358 	if (zfs_prop_inheritable(prop))
359 		(void) fprintf(fp, "  YES   ");
360 	else
361 		(void) fprintf(fp, "   NO   ");
362 
363 	if (zfs_prop_values(prop) == NULL)
364 		(void) fprintf(fp, "-\n");
365 	else
366 		(void) fprintf(fp, "%s\n", zfs_prop_values(prop));
367 
368 	return (ZPROP_CONT);
369 }
370 
371 /*
372  * Display usage message.  If we're inside a command, display only the usage for
373  * that command.  Otherwise, iterate over the entire command table and display
374  * a complete usage message.
375  */
376 static void
377 usage(boolean_t requested)
378 {
379 	int i;
380 	boolean_t show_properties = B_FALSE;
381 	FILE *fp = requested ? stdout : stderr;
382 
383 	if (current_command == NULL) {
384 
385 		(void) fprintf(fp, gettext("usage: zfs command args ...\n"));
386 		(void) fprintf(fp,
387 		    gettext("where 'command' is one of the following:\n\n"));
388 
389 		for (i = 0; i < NCOMMAND; i++) {
390 			if (command_table[i].name == NULL)
391 				(void) fprintf(fp, "\n");
392 			else
393 				(void) fprintf(fp, "%s",
394 				    get_usage(command_table[i].usage));
395 		}
396 
397 		(void) fprintf(fp, gettext("\nEach dataset is of the form: "
398 		    "pool/[dataset/]*dataset[@name]\n"));
399 	} else {
400 		(void) fprintf(fp, gettext("usage:\n"));
401 		(void) fprintf(fp, "%s", get_usage(current_command->usage));
402 	}
403 
404 	if (current_command != NULL &&
405 	    (strcmp(current_command->name, "set") == 0 ||
406 	    strcmp(current_command->name, "get") == 0 ||
407 	    strcmp(current_command->name, "inherit") == 0 ||
408 	    strcmp(current_command->name, "list") == 0))
409 		show_properties = B_TRUE;
410 
411 	if (show_properties) {
412 		(void) fprintf(fp,
413 		    gettext("\nThe following properties are supported:\n"));
414 
415 		(void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
416 		    "PROPERTY", "EDIT", "INHERIT", "VALUES");
417 
418 		/* Iterate over all properties */
419 		(void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
420 		    ZFS_TYPE_DATASET);
421 
422 		(void) fprintf(fp, "\t%-15s ", "userused@...");
423 		(void) fprintf(fp, " NO       NO   <size>\n");
424 		(void) fprintf(fp, "\t%-15s ", "groupused@...");
425 		(void) fprintf(fp, " NO       NO   <size>\n");
426 		(void) fprintf(fp, "\t%-15s ", "userquota@...");
427 		(void) fprintf(fp, "YES       NO   <size> | none\n");
428 		(void) fprintf(fp, "\t%-15s ", "groupquota@...");
429 		(void) fprintf(fp, "YES       NO   <size> | none\n");
430 		(void) fprintf(fp, "\t%-15s ", "written@<snap>");
431 		(void) fprintf(fp, " NO       NO   <size>\n");
432 
433 		(void) fprintf(fp, gettext("\nSizes are specified in bytes "
434 		    "with standard units such as K, M, G, etc.\n"));
435 		(void) fprintf(fp, gettext("\nUser-defined properties can "
436 		    "be specified by using a name containing a colon (:).\n"));
437 		(void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
438 		    "properties must be appended with\n"
439 		    "a user or group specifier of one of these forms:\n"
440 		    "    POSIX name      (eg: \"matt\")\n"
441 		    "    POSIX id        (eg: \"126829\")\n"
442 		    "    SMB name@domain (eg: \"matt@sun\")\n"
443 		    "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
444 	} else {
445 		(void) fprintf(fp,
446 		    gettext("\nFor the property list, run: %s\n"),
447 		    "zfs set|get");
448 		(void) fprintf(fp,
449 		    gettext("\nFor the delegated permission list, run: %s\n"),
450 		    "zfs allow|unallow");
451 	}
452 
453 	/*
454 	 * See comments at end of main().
455 	 */
456 	if (getenv("ZFS_ABORT") != NULL) {
457 		(void) printf("dumping core by request\n");
458 		abort();
459 	}
460 
461 	exit(requested ? 0 : 2);
462 }
463 
464 static int
465 parseprop(nvlist_t *props)
466 {
467 	char *propname = optarg;
468 	char *propval, *strval;
469 
470 	if ((propval = strchr(propname, '=')) == NULL) {
471 		(void) fprintf(stderr, gettext("missing "
472 		    "'=' for -o option\n"));
473 		return (-1);
474 	}
475 	*propval = '\0';
476 	propval++;
477 	if (nvlist_lookup_string(props, propname, &strval) == 0) {
478 		(void) fprintf(stderr, gettext("property '%s' "
479 		    "specified multiple times\n"), propname);
480 		return (-1);
481 	}
482 	if (nvlist_add_string(props, propname, propval) != 0)
483 		nomem();
484 	return (0);
485 }
486 
487 static int
488 parse_depth(char *opt, int *flags)
489 {
490 	char *tmp;
491 	int depth;
492 
493 	depth = (int)strtol(opt, &tmp, 0);
494 	if (*tmp) {
495 		(void) fprintf(stderr,
496 		    gettext("%s is not an integer\n"), optarg);
497 		usage(B_FALSE);
498 	}
499 	if (depth < 0) {
500 		(void) fprintf(stderr,
501 		    gettext("Depth can not be negative.\n"));
502 		usage(B_FALSE);
503 	}
504 	*flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
505 	return (depth);
506 }
507 
508 #define	PROGRESS_DELAY 2		/* seconds */
509 
510 static char *pt_reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
511 static time_t pt_begin;
512 static char *pt_header = NULL;
513 static boolean_t pt_shown;
514 
515 static void
516 start_progress_timer(void)
517 {
518 	pt_begin = time(NULL) + PROGRESS_DELAY;
519 	pt_shown = B_FALSE;
520 }
521 
522 static void
523 set_progress_header(char *header)
524 {
525 	assert(pt_header == NULL);
526 	pt_header = safe_strdup(header);
527 	if (pt_shown) {
528 		(void) printf("%s: ", header);
529 		(void) fflush(stdout);
530 	}
531 }
532 
533 static void
534 update_progress(char *update)
535 {
536 	if (!pt_shown && time(NULL) > pt_begin) {
537 		int len = strlen(update);
538 
539 		(void) printf("%s: %s%*.*s", pt_header, update, len, len,
540 		    pt_reverse);
541 		(void) fflush(stdout);
542 		pt_shown = B_TRUE;
543 	} else if (pt_shown) {
544 		int len = strlen(update);
545 
546 		(void) printf("%s%*.*s", update, len, len, pt_reverse);
547 		(void) fflush(stdout);
548 	}
549 }
550 
551 static void
552 finish_progress(char *done)
553 {
554 	if (pt_shown) {
555 		(void) printf("%s\n", done);
556 		(void) fflush(stdout);
557 	}
558 	free(pt_header);
559 	pt_header = NULL;
560 }
561 /*
562  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
563  *
564  * Given an existing dataset, create a writable copy whose initial contents
565  * are the same as the source.  The newly created dataset maintains a
566  * dependency on the original; the original cannot be destroyed so long as
567  * the clone exists.
568  *
569  * The '-p' flag creates all the non-existing ancestors of the target first.
570  */
571 static int
572 zfs_do_clone(int argc, char **argv)
573 {
574 	zfs_handle_t *zhp = NULL;
575 	boolean_t parents = B_FALSE;
576 	nvlist_t *props;
577 	int ret = 0;
578 	int c;
579 
580 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
581 		nomem();
582 
583 	/* check options */
584 	while ((c = getopt(argc, argv, "o:p")) != -1) {
585 		switch (c) {
586 		case 'o':
587 			if (parseprop(props))
588 				return (1);
589 			break;
590 		case 'p':
591 			parents = B_TRUE;
592 			break;
593 		case '?':
594 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
595 			    optopt);
596 			goto usage;
597 		}
598 	}
599 
600 	argc -= optind;
601 	argv += optind;
602 
603 	/* check number of arguments */
604 	if (argc < 1) {
605 		(void) fprintf(stderr, gettext("missing source dataset "
606 		    "argument\n"));
607 		goto usage;
608 	}
609 	if (argc < 2) {
610 		(void) fprintf(stderr, gettext("missing target dataset "
611 		    "argument\n"));
612 		goto usage;
613 	}
614 	if (argc > 2) {
615 		(void) fprintf(stderr, gettext("too many arguments\n"));
616 		goto usage;
617 	}
618 
619 	/* open the source dataset */
620 	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
621 		return (1);
622 
623 	if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
624 	    ZFS_TYPE_VOLUME)) {
625 		/*
626 		 * Now create the ancestors of the target dataset.  If the
627 		 * target already exists and '-p' option was used we should not
628 		 * complain.
629 		 */
630 		if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
631 		    ZFS_TYPE_VOLUME))
632 			return (0);
633 		if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
634 			return (1);
635 	}
636 
637 	/* pass to libzfs */
638 	ret = zfs_clone(zhp, argv[1], props);
639 
640 	/* create the mountpoint if necessary */
641 	if (ret == 0) {
642 		zfs_handle_t *clone;
643 
644 		clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
645 		if (clone != NULL) {
646 			if (zfs_get_type(clone) != ZFS_TYPE_VOLUME)
647 				if ((ret = zfs_mount(clone, NULL, 0)) == 0)
648 					ret = zfs_share(clone);
649 			zfs_close(clone);
650 		}
651 	}
652 
653 	zfs_close(zhp);
654 	nvlist_free(props);
655 
656 	return (!!ret);
657 
658 usage:
659 	if (zhp)
660 		zfs_close(zhp);
661 	nvlist_free(props);
662 	usage(B_FALSE);
663 	return (-1);
664 }
665 
666 /*
667  * zfs create [-p] [-o prop=value] ... fs
668  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
669  *
670  * Create a new dataset.  This command can be used to create filesystems
671  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
672  * For volumes, the user must specify a size to be used.
673  *
674  * The '-s' flag applies only to volumes, and indicates that we should not try
675  * to set the reservation for this volume.  By default we set a reservation
676  * equal to the size for any volume.  For pools with SPA_VERSION >=
677  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
678  *
679  * The '-p' flag creates all the non-existing ancestors of the target first.
680  */
681 static int
682 zfs_do_create(int argc, char **argv)
683 {
684 	zfs_type_t type = ZFS_TYPE_FILESYSTEM;
685 	zfs_handle_t *zhp = NULL;
686 	uint64_t volsize;
687 	int c;
688 	boolean_t noreserve = B_FALSE;
689 	boolean_t bflag = B_FALSE;
690 	boolean_t parents = B_FALSE;
691 	int ret = 1;
692 	nvlist_t *props;
693 	uint64_t intval;
694 	int canmount = ZFS_CANMOUNT_OFF;
695 
696 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
697 		nomem();
698 
699 	/* check options */
700 	while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
701 		switch (c) {
702 		case 'V':
703 			type = ZFS_TYPE_VOLUME;
704 			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
705 				(void) fprintf(stderr, gettext("bad volume "
706 				    "size '%s': %s\n"), optarg,
707 				    libzfs_error_description(g_zfs));
708 				goto error;
709 			}
710 
711 			if (nvlist_add_uint64(props,
712 			    zfs_prop_to_name(ZFS_PROP_VOLSIZE), intval) != 0)
713 				nomem();
714 			volsize = intval;
715 			break;
716 		case 'p':
717 			parents = B_TRUE;
718 			break;
719 		case 'b':
720 			bflag = B_TRUE;
721 			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
722 				(void) fprintf(stderr, gettext("bad volume "
723 				    "block size '%s': %s\n"), optarg,
724 				    libzfs_error_description(g_zfs));
725 				goto error;
726 			}
727 
728 			if (nvlist_add_uint64(props,
729 			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
730 			    intval) != 0)
731 				nomem();
732 			break;
733 		case 'o':
734 			if (parseprop(props))
735 				goto error;
736 			break;
737 		case 's':
738 			noreserve = B_TRUE;
739 			break;
740 		case ':':
741 			(void) fprintf(stderr, gettext("missing size "
742 			    "argument\n"));
743 			goto badusage;
744 			break;
745 		case '?':
746 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
747 			    optopt);
748 			goto badusage;
749 		}
750 	}
751 
752 	if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
753 		(void) fprintf(stderr, gettext("'-s' and '-b' can only be "
754 		    "used when creating a volume\n"));
755 		goto badusage;
756 	}
757 
758 	argc -= optind;
759 	argv += optind;
760 
761 	/* check number of arguments */
762 	if (argc == 0) {
763 		(void) fprintf(stderr, gettext("missing %s argument\n"),
764 		    zfs_type_to_name(type));
765 		goto badusage;
766 	}
767 	if (argc > 1) {
768 		(void) fprintf(stderr, gettext("too many arguments\n"));
769 		goto badusage;
770 	}
771 
772 	if (type == ZFS_TYPE_VOLUME && !noreserve) {
773 		zpool_handle_t *zpool_handle;
774 		uint64_t spa_version;
775 		char *p;
776 		zfs_prop_t resv_prop;
777 		char *strval;
778 
779 		if (p = strchr(argv[0], '/'))
780 			*p = '\0';
781 		zpool_handle = zpool_open(g_zfs, argv[0]);
782 		if (p != NULL)
783 			*p = '/';
784 		if (zpool_handle == NULL)
785 			goto error;
786 		spa_version = zpool_get_prop_int(zpool_handle,
787 		    ZPOOL_PROP_VERSION, NULL);
788 		zpool_close(zpool_handle);
789 		if (spa_version >= SPA_VERSION_REFRESERVATION)
790 			resv_prop = ZFS_PROP_REFRESERVATION;
791 		else
792 			resv_prop = ZFS_PROP_RESERVATION;
793 		volsize = zvol_volsize_to_reservation(volsize, props);
794 
795 		if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
796 		    &strval) != 0) {
797 			if (nvlist_add_uint64(props,
798 			    zfs_prop_to_name(resv_prop), volsize) != 0) {
799 				nvlist_free(props);
800 				nomem();
801 			}
802 		}
803 	}
804 
805 	if (parents && zfs_name_valid(argv[0], type)) {
806 		/*
807 		 * Now create the ancestors of target dataset.  If the target
808 		 * already exists and '-p' option was used we should not
809 		 * complain.
810 		 */
811 		if (zfs_dataset_exists(g_zfs, argv[0], type)) {
812 			ret = 0;
813 			goto error;
814 		}
815 		if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
816 			goto error;
817 	}
818 
819 	/* pass to libzfs */
820 	if (zfs_create(g_zfs, argv[0], type, props) != 0)
821 		goto error;
822 
823 	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
824 		goto error;
825 
826 	ret = 0;
827 	/*
828 	 * if the user doesn't want the dataset automatically mounted,
829 	 * then skip the mount/share step
830 	 */
831 	if (zfs_prop_valid_for_type(ZFS_PROP_CANMOUNT, type))
832 		canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
833 
834 	/*
835 	 * Mount and/or share the new filesystem as appropriate.  We provide a
836 	 * verbose error message to let the user know that their filesystem was
837 	 * in fact created, even if we failed to mount or share it.
838 	 */
839 	if (canmount == ZFS_CANMOUNT_ON) {
840 		if (zfs_mount(zhp, NULL, 0) != 0) {
841 			(void) fprintf(stderr, gettext("filesystem "
842 			    "successfully created, but not mounted\n"));
843 			ret = 1;
844 		} else if (zfs_share(zhp) != 0) {
845 			(void) fprintf(stderr, gettext("filesystem "
846 			    "successfully created, but not shared\n"));
847 			ret = 1;
848 		}
849 	}
850 
851 error:
852 	if (zhp)
853 		zfs_close(zhp);
854 	nvlist_free(props);
855 	return (ret);
856 badusage:
857 	nvlist_free(props);
858 	usage(B_FALSE);
859 	return (2);
860 }
861 
862 /*
863  * zfs destroy [-rRf] <fs, vol>
864  * zfs destroy [-rRd] <snap>
865  *
866  *	-r	Recursively destroy all children
867  *	-R	Recursively destroy all dependents, including clones
868  *	-f	Force unmounting of any dependents
869  *	-d	If we can't destroy now, mark for deferred destruction
870  *
871  * Destroys the given dataset.  By default, it will unmount any filesystems,
872  * and refuse to destroy a dataset that has any dependents.  A dependent can
873  * either be a child, or a clone of a child.
874  */
875 typedef struct destroy_cbdata {
876 	boolean_t	cb_first;
877 	boolean_t	cb_force;
878 	boolean_t	cb_recurse;
879 	boolean_t	cb_error;
880 	boolean_t	cb_doclones;
881 	zfs_handle_t	*cb_target;
882 	boolean_t	cb_defer_destroy;
883 	boolean_t	cb_verbose;
884 	boolean_t	cb_parsable;
885 	boolean_t	cb_dryrun;
886 	nvlist_t	*cb_nvl;
887 
888 	/* first snap in contiguous run */
889 	zfs_handle_t	*cb_firstsnap;
890 	/* previous snap in contiguous run */
891 	zfs_handle_t	*cb_prevsnap;
892 	int64_t		cb_snapused;
893 	char		*cb_snapspec;
894 } destroy_cbdata_t;
895 
896 /*
897  * Check for any dependents based on the '-r' or '-R' flags.
898  */
899 static int
900 destroy_check_dependent(zfs_handle_t *zhp, void *data)
901 {
902 	destroy_cbdata_t *cbp = data;
903 	const char *tname = zfs_get_name(cbp->cb_target);
904 	const char *name = zfs_get_name(zhp);
905 
906 	if (strncmp(tname, name, strlen(tname)) == 0 &&
907 	    (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
908 		/*
909 		 * This is a direct descendant, not a clone somewhere else in
910 		 * the hierarchy.
911 		 */
912 		if (cbp->cb_recurse)
913 			goto out;
914 
915 		if (cbp->cb_first) {
916 			(void) fprintf(stderr, gettext("cannot destroy '%s': "
917 			    "%s has children\n"),
918 			    zfs_get_name(cbp->cb_target),
919 			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
920 			(void) fprintf(stderr, gettext("use '-r' to destroy "
921 			    "the following datasets:\n"));
922 			cbp->cb_first = B_FALSE;
923 			cbp->cb_error = B_TRUE;
924 		}
925 
926 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
927 	} else {
928 		/*
929 		 * This is a clone.  We only want to report this if the '-r'
930 		 * wasn't specified, or the target is a snapshot.
931 		 */
932 		if (!cbp->cb_recurse &&
933 		    zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
934 			goto out;
935 
936 		if (cbp->cb_first) {
937 			(void) fprintf(stderr, gettext("cannot destroy '%s': "
938 			    "%s has dependent clones\n"),
939 			    zfs_get_name(cbp->cb_target),
940 			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
941 			(void) fprintf(stderr, gettext("use '-R' to destroy "
942 			    "the following datasets:\n"));
943 			cbp->cb_first = B_FALSE;
944 			cbp->cb_error = B_TRUE;
945 			cbp->cb_dryrun = B_TRUE;
946 		}
947 
948 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
949 	}
950 
951 out:
952 	zfs_close(zhp);
953 	return (0);
954 }
955 
956 static int
957 destroy_callback(zfs_handle_t *zhp, void *data)
958 {
959 	destroy_cbdata_t *cb = data;
960 	const char *name = zfs_get_name(zhp);
961 
962 	if (cb->cb_verbose) {
963 		if (cb->cb_parsable) {
964 			(void) printf("destroy\t%s\n", name);
965 		} else if (cb->cb_dryrun) {
966 			(void) printf(gettext("would destroy %s\n"),
967 			    name);
968 		} else {
969 			(void) printf(gettext("will destroy %s\n"),
970 			    name);
971 		}
972 	}
973 
974 	/*
975 	 * Ignore pools (which we've already flagged as an error before getting
976 	 * here).
977 	 */
978 	if (strchr(zfs_get_name(zhp), '/') == NULL &&
979 	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
980 		zfs_close(zhp);
981 		return (0);
982 	}
983 
984 	if (!cb->cb_dryrun) {
985 		if (zfs_unmount(zhp, NULL, cb->cb_force ? MS_FORCE : 0) != 0 ||
986 		    zfs_destroy(zhp, cb->cb_defer_destroy) != 0) {
987 			zfs_close(zhp);
988 			return (-1);
989 		}
990 	}
991 
992 	zfs_close(zhp);
993 	return (0);
994 }
995 
996 static int
997 destroy_print_cb(zfs_handle_t *zhp, void *arg)
998 {
999 	destroy_cbdata_t *cb = arg;
1000 	const char *name = zfs_get_name(zhp);
1001 	int err = 0;
1002 
1003 	if (nvlist_exists(cb->cb_nvl, name)) {
1004 		if (cb->cb_firstsnap == NULL)
1005 			cb->cb_firstsnap = zfs_handle_dup(zhp);
1006 		if (cb->cb_prevsnap != NULL)
1007 			zfs_close(cb->cb_prevsnap);
1008 		/* this snap continues the current range */
1009 		cb->cb_prevsnap = zfs_handle_dup(zhp);
1010 		if (cb->cb_verbose) {
1011 			if (cb->cb_parsable) {
1012 				(void) printf("destroy\t%s\n", name);
1013 			} else if (cb->cb_dryrun) {
1014 				(void) printf(gettext("would destroy %s\n"),
1015 				    name);
1016 			} else {
1017 				(void) printf(gettext("will destroy %s\n"),
1018 				    name);
1019 			}
1020 		}
1021 	} else if (cb->cb_firstsnap != NULL) {
1022 		/* end of this range */
1023 		uint64_t used = 0;
1024 		err = zfs_get_snapused_int(cb->cb_firstsnap,
1025 		    cb->cb_prevsnap, &used);
1026 		cb->cb_snapused += used;
1027 		zfs_close(cb->cb_firstsnap);
1028 		cb->cb_firstsnap = NULL;
1029 		zfs_close(cb->cb_prevsnap);
1030 		cb->cb_prevsnap = NULL;
1031 	}
1032 	zfs_close(zhp);
1033 	return (err);
1034 }
1035 
1036 static int
1037 destroy_print_snapshots(zfs_handle_t *fs_zhp, destroy_cbdata_t *cb)
1038 {
1039 	int err = 0;
1040 	assert(cb->cb_firstsnap == NULL);
1041 	assert(cb->cb_prevsnap == NULL);
1042 	err = zfs_iter_snapshots_sorted(fs_zhp, destroy_print_cb, cb);
1043 	if (cb->cb_firstsnap != NULL) {
1044 		uint64_t used = 0;
1045 		if (err == 0) {
1046 			err = zfs_get_snapused_int(cb->cb_firstsnap,
1047 			    cb->cb_prevsnap, &used);
1048 		}
1049 		cb->cb_snapused += used;
1050 		zfs_close(cb->cb_firstsnap);
1051 		cb->cb_firstsnap = NULL;
1052 		zfs_close(cb->cb_prevsnap);
1053 		cb->cb_prevsnap = NULL;
1054 	}
1055 	return (err);
1056 }
1057 
1058 static int
1059 snapshot_to_nvl_cb(zfs_handle_t *zhp, void *arg)
1060 {
1061 	destroy_cbdata_t *cb = arg;
1062 	int err = 0;
1063 
1064 	/* Check for clones. */
1065 	if (!cb->cb_doclones) {
1066 		cb->cb_target = zhp;
1067 		cb->cb_first = B_TRUE;
1068 		err = zfs_iter_dependents(zhp, B_TRUE,
1069 		    destroy_check_dependent, cb);
1070 	}
1071 
1072 	if (err == 0) {
1073 		if (nvlist_add_boolean(cb->cb_nvl, zfs_get_name(zhp)))
1074 			nomem();
1075 	}
1076 	zfs_close(zhp);
1077 	return (err);
1078 }
1079 
1080 static int
1081 gather_snapshots(zfs_handle_t *zhp, void *arg)
1082 {
1083 	destroy_cbdata_t *cb = arg;
1084 	int err = 0;
1085 
1086 	err = zfs_iter_snapspec(zhp, cb->cb_snapspec, snapshot_to_nvl_cb, cb);
1087 	if (err == ENOENT)
1088 		err = 0;
1089 	if (err != 0)
1090 		goto out;
1091 
1092 	if (cb->cb_verbose) {
1093 		err = destroy_print_snapshots(zhp, cb);
1094 		if (err != 0)
1095 			goto out;
1096 	}
1097 
1098 	if (cb->cb_recurse)
1099 		err = zfs_iter_filesystems(zhp, gather_snapshots, cb);
1100 
1101 out:
1102 	zfs_close(zhp);
1103 	return (err);
1104 }
1105 
1106 static int
1107 destroy_clones(destroy_cbdata_t *cb)
1108 {
1109 	nvpair_t *pair;
1110 	for (pair = nvlist_next_nvpair(cb->cb_nvl, NULL);
1111 	    pair != NULL;
1112 	    pair = nvlist_next_nvpair(cb->cb_nvl, pair)) {
1113 		zfs_handle_t *zhp = zfs_open(g_zfs, nvpair_name(pair),
1114 		    ZFS_TYPE_SNAPSHOT);
1115 		if (zhp != NULL) {
1116 			boolean_t defer = cb->cb_defer_destroy;
1117 			int err = 0;
1118 
1119 			/*
1120 			 * We can't defer destroy non-snapshots, so set it to
1121 			 * false while destroying the clones.
1122 			 */
1123 			cb->cb_defer_destroy = B_FALSE;
1124 			err = zfs_iter_dependents(zhp, B_FALSE,
1125 			    destroy_callback, cb);
1126 			cb->cb_defer_destroy = defer;
1127 			zfs_close(zhp);
1128 			if (err != 0)
1129 				return (err);
1130 		}
1131 	}
1132 	return (0);
1133 }
1134 
1135 static int
1136 zfs_do_destroy(int argc, char **argv)
1137 {
1138 	destroy_cbdata_t cb = { 0 };
1139 	int c;
1140 	zfs_handle_t *zhp;
1141 	char *at;
1142 	zfs_type_t type = ZFS_TYPE_DATASET;
1143 
1144 	/* check options */
1145 	while ((c = getopt(argc, argv, "vpndfrR")) != -1) {
1146 		switch (c) {
1147 		case 'v':
1148 			cb.cb_verbose = B_TRUE;
1149 			break;
1150 		case 'p':
1151 			cb.cb_verbose = B_TRUE;
1152 			cb.cb_parsable = B_TRUE;
1153 			break;
1154 		case 'n':
1155 			cb.cb_dryrun = B_TRUE;
1156 			break;
1157 		case 'd':
1158 			cb.cb_defer_destroy = B_TRUE;
1159 			type = ZFS_TYPE_SNAPSHOT;
1160 			break;
1161 		case 'f':
1162 			cb.cb_force = B_TRUE;
1163 			break;
1164 		case 'r':
1165 			cb.cb_recurse = B_TRUE;
1166 			break;
1167 		case 'R':
1168 			cb.cb_recurse = B_TRUE;
1169 			cb.cb_doclones = B_TRUE;
1170 			break;
1171 		case '?':
1172 		default:
1173 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1174 			    optopt);
1175 			usage(B_FALSE);
1176 		}
1177 	}
1178 
1179 	argc -= optind;
1180 	argv += optind;
1181 
1182 	/* check number of arguments */
1183 	if (argc == 0) {
1184 		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1185 		usage(B_FALSE);
1186 	}
1187 	if (argc > 1) {
1188 		(void) fprintf(stderr, gettext("too many arguments\n"));
1189 		usage(B_FALSE);
1190 	}
1191 
1192 	at = strchr(argv[0], '@');
1193 	if (at != NULL) {
1194 		int err = 0;
1195 
1196 		/* Build the list of snaps to destroy in cb_nvl. */
1197 		if (nvlist_alloc(&cb.cb_nvl, NV_UNIQUE_NAME, 0) != 0)
1198 			nomem();
1199 
1200 		*at = '\0';
1201 		zhp = zfs_open(g_zfs, argv[0],
1202 		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1203 		if (zhp == NULL)
1204 			return (1);
1205 
1206 		cb.cb_snapspec = at + 1;
1207 		if (gather_snapshots(zfs_handle_dup(zhp), &cb) != 0 ||
1208 		    cb.cb_error) {
1209 			zfs_close(zhp);
1210 			nvlist_free(cb.cb_nvl);
1211 			return (1);
1212 		}
1213 
1214 		if (nvlist_empty(cb.cb_nvl)) {
1215 			(void) fprintf(stderr, gettext("could not find any "
1216 			    "snapshots to destroy; check snapshot names.\n"));
1217 			zfs_close(zhp);
1218 			nvlist_free(cb.cb_nvl);
1219 			return (1);
1220 		}
1221 
1222 		if (cb.cb_verbose) {
1223 			char buf[16];
1224 			zfs_nicenum(cb.cb_snapused, buf, sizeof (buf));
1225 			if (cb.cb_parsable) {
1226 				(void) printf("reclaim\t%llu\n",
1227 				    cb.cb_snapused);
1228 			} else if (cb.cb_dryrun) {
1229 				(void) printf(gettext("would reclaim %s\n"),
1230 				    buf);
1231 			} else {
1232 				(void) printf(gettext("will reclaim %s\n"),
1233 				    buf);
1234 			}
1235 		}
1236 
1237 		if (!cb.cb_dryrun) {
1238 			if (cb.cb_doclones)
1239 				err = destroy_clones(&cb);
1240 			if (err == 0) {
1241 				err = zfs_destroy_snaps_nvl(zhp, cb.cb_nvl,
1242 				    cb.cb_defer_destroy);
1243 			}
1244 		}
1245 
1246 		zfs_close(zhp);
1247 		nvlist_free(cb.cb_nvl);
1248 		if (err != 0)
1249 			return (1);
1250 	} else {
1251 		/* Open the given dataset */
1252 		if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1253 			return (1);
1254 
1255 		cb.cb_target = zhp;
1256 
1257 		/*
1258 		 * Perform an explicit check for pools before going any further.
1259 		 */
1260 		if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1261 		    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1262 			(void) fprintf(stderr, gettext("cannot destroy '%s': "
1263 			    "operation does not apply to pools\n"),
1264 			    zfs_get_name(zhp));
1265 			(void) fprintf(stderr, gettext("use 'zfs destroy -r "
1266 			    "%s' to destroy all datasets in the pool\n"),
1267 			    zfs_get_name(zhp));
1268 			(void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1269 			    "to destroy the pool itself\n"), zfs_get_name(zhp));
1270 			zfs_close(zhp);
1271 			return (1);
1272 		}
1273 
1274 		/*
1275 		 * Check for any dependents and/or clones.
1276 		 */
1277 		cb.cb_first = B_TRUE;
1278 		if (!cb.cb_doclones &&
1279 		    zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1280 		    &cb) != 0) {
1281 			zfs_close(zhp);
1282 			return (1);
1283 		}
1284 
1285 		if (cb.cb_error) {
1286 			zfs_close(zhp);
1287 			return (1);
1288 		}
1289 
1290 		if (zfs_iter_dependents(zhp, B_FALSE, destroy_callback,
1291 		    &cb) != 0) {
1292 			zfs_close(zhp);
1293 			return (1);
1294 		}
1295 
1296 		/*
1297 		 * Do the real thing.  The callback will close the
1298 		 * handle regardless of whether it succeeds or not.
1299 		 */
1300 		if (destroy_callback(zhp, &cb) != 0)
1301 			return (1);
1302 	}
1303 
1304 	return (0);
1305 }
1306 
1307 static boolean_t
1308 is_recvd_column(zprop_get_cbdata_t *cbp)
1309 {
1310 	int i;
1311 	zfs_get_column_t col;
1312 
1313 	for (i = 0; i < ZFS_GET_NCOLS &&
1314 	    (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1315 		if (col == GET_COL_RECVD)
1316 			return (B_TRUE);
1317 	return (B_FALSE);
1318 }
1319 
1320 /*
1321  * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1322  *	< all | property[,property]... > < fs | snap | vol > ...
1323  *
1324  *	-r	recurse over any child datasets
1325  *	-H	scripted mode.  Headers are stripped, and fields are separated
1326  *		by tabs instead of spaces.
1327  *	-o	Set of fields to display.  One of "name,property,value,
1328  *		received,source". Default is "name,property,value,source".
1329  *		"all" is an alias for all five.
1330  *	-s	Set of sources to allow.  One of
1331  *		"local,default,inherited,received,temporary,none".  Default is
1332  *		all six.
1333  *	-p	Display values in parsable (literal) format.
1334  *
1335  *  Prints properties for the given datasets.  The user can control which
1336  *  columns to display as well as which property types to allow.
1337  */
1338 
1339 /*
1340  * Invoked to display the properties for a single dataset.
1341  */
1342 static int
1343 get_callback(zfs_handle_t *zhp, void *data)
1344 {
1345 	char buf[ZFS_MAXPROPLEN];
1346 	char rbuf[ZFS_MAXPROPLEN];
1347 	zprop_source_t sourcetype;
1348 	char source[ZFS_MAXNAMELEN];
1349 	zprop_get_cbdata_t *cbp = data;
1350 	nvlist_t *user_props = zfs_get_user_props(zhp);
1351 	zprop_list_t *pl = cbp->cb_proplist;
1352 	nvlist_t *propval;
1353 	char *strval;
1354 	char *sourceval;
1355 	boolean_t received = is_recvd_column(cbp);
1356 
1357 	for (; pl != NULL; pl = pl->pl_next) {
1358 		char *recvdval = NULL;
1359 		/*
1360 		 * Skip the special fake placeholder.  This will also skip over
1361 		 * the name property when 'all' is specified.
1362 		 */
1363 		if (pl->pl_prop == ZFS_PROP_NAME &&
1364 		    pl == cbp->cb_proplist)
1365 			continue;
1366 
1367 		if (pl->pl_prop != ZPROP_INVAL) {
1368 			if (zfs_prop_get(zhp, pl->pl_prop, buf,
1369 			    sizeof (buf), &sourcetype, source,
1370 			    sizeof (source),
1371 			    cbp->cb_literal) != 0) {
1372 				if (pl->pl_all)
1373 					continue;
1374 				if (!zfs_prop_valid_for_type(pl->pl_prop,
1375 				    ZFS_TYPE_DATASET)) {
1376 					(void) fprintf(stderr,
1377 					    gettext("No such property '%s'\n"),
1378 					    zfs_prop_to_name(pl->pl_prop));
1379 					continue;
1380 				}
1381 				sourcetype = ZPROP_SRC_NONE;
1382 				(void) strlcpy(buf, "-", sizeof (buf));
1383 			}
1384 
1385 			if (received && (zfs_prop_get_recvd(zhp,
1386 			    zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1387 			    cbp->cb_literal) == 0))
1388 				recvdval = rbuf;
1389 
1390 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1391 			    zfs_prop_to_name(pl->pl_prop),
1392 			    buf, sourcetype, source, recvdval);
1393 		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1394 			sourcetype = ZPROP_SRC_LOCAL;
1395 
1396 			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1397 			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1398 				sourcetype = ZPROP_SRC_NONE;
1399 				(void) strlcpy(buf, "-", sizeof (buf));
1400 			}
1401 
1402 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1403 			    pl->pl_user_prop, buf, sourcetype, source, NULL);
1404 		} else if (zfs_prop_written(pl->pl_user_prop)) {
1405 			sourcetype = ZPROP_SRC_LOCAL;
1406 
1407 			if (zfs_prop_get_written(zhp, pl->pl_user_prop,
1408 			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1409 				sourcetype = ZPROP_SRC_NONE;
1410 				(void) strlcpy(buf, "-", sizeof (buf));
1411 			}
1412 
1413 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1414 			    pl->pl_user_prop, buf, sourcetype, source, NULL);
1415 		} else {
1416 			if (nvlist_lookup_nvlist(user_props,
1417 			    pl->pl_user_prop, &propval) != 0) {
1418 				if (pl->pl_all)
1419 					continue;
1420 				sourcetype = ZPROP_SRC_NONE;
1421 				strval = "-";
1422 			} else {
1423 				verify(nvlist_lookup_string(propval,
1424 				    ZPROP_VALUE, &strval) == 0);
1425 				verify(nvlist_lookup_string(propval,
1426 				    ZPROP_SOURCE, &sourceval) == 0);
1427 
1428 				if (strcmp(sourceval,
1429 				    zfs_get_name(zhp)) == 0) {
1430 					sourcetype = ZPROP_SRC_LOCAL;
1431 				} else if (strcmp(sourceval,
1432 				    ZPROP_SOURCE_VAL_RECVD) == 0) {
1433 					sourcetype = ZPROP_SRC_RECEIVED;
1434 				} else {
1435 					sourcetype = ZPROP_SRC_INHERITED;
1436 					(void) strlcpy(source,
1437 					    sourceval, sizeof (source));
1438 				}
1439 			}
1440 
1441 			if (received && (zfs_prop_get_recvd(zhp,
1442 			    pl->pl_user_prop, rbuf, sizeof (rbuf),
1443 			    cbp->cb_literal) == 0))
1444 				recvdval = rbuf;
1445 
1446 			zprop_print_one_property(zfs_get_name(zhp), cbp,
1447 			    pl->pl_user_prop, strval, sourcetype,
1448 			    source, recvdval);
1449 		}
1450 	}
1451 
1452 	return (0);
1453 }
1454 
1455 static int
1456 zfs_do_get(int argc, char **argv)
1457 {
1458 	zprop_get_cbdata_t cb = { 0 };
1459 	int i, c, flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1460 	char *value, *fields;
1461 	int ret = 0;
1462 	int limit = 0;
1463 	zprop_list_t fake_name = { 0 };
1464 
1465 	/*
1466 	 * Set up default columns and sources.
1467 	 */
1468 	cb.cb_sources = ZPROP_SRC_ALL;
1469 	cb.cb_columns[0] = GET_COL_NAME;
1470 	cb.cb_columns[1] = GET_COL_PROPERTY;
1471 	cb.cb_columns[2] = GET_COL_VALUE;
1472 	cb.cb_columns[3] = GET_COL_SOURCE;
1473 	cb.cb_type = ZFS_TYPE_DATASET;
1474 
1475 	/* check options */
1476 	while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
1477 		switch (c) {
1478 		case 'p':
1479 			cb.cb_literal = B_TRUE;
1480 			break;
1481 		case 'd':
1482 			limit = parse_depth(optarg, &flags);
1483 			break;
1484 		case 'r':
1485 			flags |= ZFS_ITER_RECURSE;
1486 			break;
1487 		case 'H':
1488 			cb.cb_scripted = B_TRUE;
1489 			break;
1490 		case ':':
1491 			(void) fprintf(stderr, gettext("missing argument for "
1492 			    "'%c' option\n"), optopt);
1493 			usage(B_FALSE);
1494 			break;
1495 		case 'o':
1496 			/*
1497 			 * Process the set of columns to display.  We zero out
1498 			 * the structure to give us a blank slate.
1499 			 */
1500 			bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1501 			i = 0;
1502 			while (*optarg != '\0') {
1503 				static char *col_subopts[] =
1504 				    { "name", "property", "value", "received",
1505 				    "source", "all", NULL };
1506 
1507 				if (i == ZFS_GET_NCOLS) {
1508 					(void) fprintf(stderr, gettext("too "
1509 					    "many fields given to -o "
1510 					    "option\n"));
1511 					usage(B_FALSE);
1512 				}
1513 
1514 				switch (getsubopt(&optarg, col_subopts,
1515 				    &value)) {
1516 				case 0:
1517 					cb.cb_columns[i++] = GET_COL_NAME;
1518 					break;
1519 				case 1:
1520 					cb.cb_columns[i++] = GET_COL_PROPERTY;
1521 					break;
1522 				case 2:
1523 					cb.cb_columns[i++] = GET_COL_VALUE;
1524 					break;
1525 				case 3:
1526 					cb.cb_columns[i++] = GET_COL_RECVD;
1527 					flags |= ZFS_ITER_RECVD_PROPS;
1528 					break;
1529 				case 4:
1530 					cb.cb_columns[i++] = GET_COL_SOURCE;
1531 					break;
1532 				case 5:
1533 					if (i > 0) {
1534 						(void) fprintf(stderr,
1535 						    gettext("\"all\" conflicts "
1536 						    "with specific fields "
1537 						    "given to -o option\n"));
1538 						usage(B_FALSE);
1539 					}
1540 					cb.cb_columns[0] = GET_COL_NAME;
1541 					cb.cb_columns[1] = GET_COL_PROPERTY;
1542 					cb.cb_columns[2] = GET_COL_VALUE;
1543 					cb.cb_columns[3] = GET_COL_RECVD;
1544 					cb.cb_columns[4] = GET_COL_SOURCE;
1545 					flags |= ZFS_ITER_RECVD_PROPS;
1546 					i = ZFS_GET_NCOLS;
1547 					break;
1548 				default:
1549 					(void) fprintf(stderr,
1550 					    gettext("invalid column name "
1551 					    "'%s'\n"), value);
1552 					usage(B_FALSE);
1553 				}
1554 			}
1555 			break;
1556 
1557 		case 's':
1558 			cb.cb_sources = 0;
1559 			while (*optarg != '\0') {
1560 				static char *source_subopts[] = {
1561 					"local", "default", "inherited",
1562 					"received", "temporary", "none",
1563 					NULL };
1564 
1565 				switch (getsubopt(&optarg, source_subopts,
1566 				    &value)) {
1567 				case 0:
1568 					cb.cb_sources |= ZPROP_SRC_LOCAL;
1569 					break;
1570 				case 1:
1571 					cb.cb_sources |= ZPROP_SRC_DEFAULT;
1572 					break;
1573 				case 2:
1574 					cb.cb_sources |= ZPROP_SRC_INHERITED;
1575 					break;
1576 				case 3:
1577 					cb.cb_sources |= ZPROP_SRC_RECEIVED;
1578 					break;
1579 				case 4:
1580 					cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1581 					break;
1582 				case 5:
1583 					cb.cb_sources |= ZPROP_SRC_NONE;
1584 					break;
1585 				default:
1586 					(void) fprintf(stderr,
1587 					    gettext("invalid source "
1588 					    "'%s'\n"), value);
1589 					usage(B_FALSE);
1590 				}
1591 			}
1592 			break;
1593 
1594 		case '?':
1595 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1596 			    optopt);
1597 			usage(B_FALSE);
1598 		}
1599 	}
1600 
1601 	argc -= optind;
1602 	argv += optind;
1603 
1604 	if (argc < 1) {
1605 		(void) fprintf(stderr, gettext("missing property "
1606 		    "argument\n"));
1607 		usage(B_FALSE);
1608 	}
1609 
1610 	fields = argv[0];
1611 
1612 	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1613 	    != 0)
1614 		usage(B_FALSE);
1615 
1616 	argc--;
1617 	argv++;
1618 
1619 	/*
1620 	 * As part of zfs_expand_proplist(), we keep track of the maximum column
1621 	 * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1622 	 * need to know the maximum name length.  However, the user likely did
1623 	 * not specify 'name' as one of the properties to fetch, so we need to
1624 	 * make sure we always include at least this property for
1625 	 * print_get_headers() to work properly.
1626 	 */
1627 	if (cb.cb_proplist != NULL) {
1628 		fake_name.pl_prop = ZFS_PROP_NAME;
1629 		fake_name.pl_width = strlen(gettext("NAME"));
1630 		fake_name.pl_next = cb.cb_proplist;
1631 		cb.cb_proplist = &fake_name;
1632 	}
1633 
1634 	cb.cb_first = B_TRUE;
1635 
1636 	/* run for each object */
1637 	ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1638 	    &cb.cb_proplist, limit, get_callback, &cb);
1639 
1640 	if (cb.cb_proplist == &fake_name)
1641 		zprop_free_list(fake_name.pl_next);
1642 	else
1643 		zprop_free_list(cb.cb_proplist);
1644 
1645 	return (ret);
1646 }
1647 
1648 /*
1649  * inherit [-rS] <property> <fs|vol> ...
1650  *
1651  *	-r	Recurse over all children
1652  *	-S	Revert to received value, if any
1653  *
1654  * For each dataset specified on the command line, inherit the given property
1655  * from its parent.  Inheriting a property at the pool level will cause it to
1656  * use the default value.  The '-r' flag will recurse over all children, and is
1657  * useful for setting a property on a hierarchy-wide basis, regardless of any
1658  * local modifications for each dataset.
1659  */
1660 
1661 typedef struct inherit_cbdata {
1662 	const char *cb_propname;
1663 	boolean_t cb_received;
1664 } inherit_cbdata_t;
1665 
1666 static int
1667 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1668 {
1669 	inherit_cbdata_t *cb = data;
1670 	zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1671 
1672 	/*
1673 	 * If we're doing it recursively, then ignore properties that
1674 	 * are not valid for this type of dataset.
1675 	 */
1676 	if (prop != ZPROP_INVAL &&
1677 	    !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1678 		return (0);
1679 
1680 	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1681 }
1682 
1683 static int
1684 inherit_cb(zfs_handle_t *zhp, void *data)
1685 {
1686 	inherit_cbdata_t *cb = data;
1687 
1688 	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1689 }
1690 
1691 static int
1692 zfs_do_inherit(int argc, char **argv)
1693 {
1694 	int c;
1695 	zfs_prop_t prop;
1696 	inherit_cbdata_t cb = { 0 };
1697 	char *propname;
1698 	int ret = 0;
1699 	int flags = 0;
1700 	boolean_t received = B_FALSE;
1701 
1702 	/* check options */
1703 	while ((c = getopt(argc, argv, "rS")) != -1) {
1704 		switch (c) {
1705 		case 'r':
1706 			flags |= ZFS_ITER_RECURSE;
1707 			break;
1708 		case 'S':
1709 			received = B_TRUE;
1710 			break;
1711 		case '?':
1712 		default:
1713 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1714 			    optopt);
1715 			usage(B_FALSE);
1716 		}
1717 	}
1718 
1719 	argc -= optind;
1720 	argv += optind;
1721 
1722 	/* check number of arguments */
1723 	if (argc < 1) {
1724 		(void) fprintf(stderr, gettext("missing property argument\n"));
1725 		usage(B_FALSE);
1726 	}
1727 	if (argc < 2) {
1728 		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1729 		usage(B_FALSE);
1730 	}
1731 
1732 	propname = argv[0];
1733 	argc--;
1734 	argv++;
1735 
1736 	if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1737 		if (zfs_prop_readonly(prop)) {
1738 			(void) fprintf(stderr, gettext(
1739 			    "%s property is read-only\n"),
1740 			    propname);
1741 			return (1);
1742 		}
1743 		if (!zfs_prop_inheritable(prop) && !received) {
1744 			(void) fprintf(stderr, gettext("'%s' property cannot "
1745 			    "be inherited\n"), propname);
1746 			if (prop == ZFS_PROP_QUOTA ||
1747 			    prop == ZFS_PROP_RESERVATION ||
1748 			    prop == ZFS_PROP_REFQUOTA ||
1749 			    prop == ZFS_PROP_REFRESERVATION)
1750 				(void) fprintf(stderr, gettext("use 'zfs set "
1751 				    "%s=none' to clear\n"), propname);
1752 			return (1);
1753 		}
1754 		if (received && (prop == ZFS_PROP_VOLSIZE ||
1755 		    prop == ZFS_PROP_VERSION)) {
1756 			(void) fprintf(stderr, gettext("'%s' property cannot "
1757 			    "be reverted to a received value\n"), propname);
1758 			return (1);
1759 		}
1760 	} else if (!zfs_prop_user(propname)) {
1761 		(void) fprintf(stderr, gettext("invalid property '%s'\n"),
1762 		    propname);
1763 		usage(B_FALSE);
1764 	}
1765 
1766 	cb.cb_propname = propname;
1767 	cb.cb_received = received;
1768 
1769 	if (flags & ZFS_ITER_RECURSE) {
1770 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1771 		    NULL, NULL, 0, inherit_recurse_cb, &cb);
1772 	} else {
1773 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1774 		    NULL, NULL, 0, inherit_cb, &cb);
1775 	}
1776 
1777 	return (ret);
1778 }
1779 
1780 typedef struct upgrade_cbdata {
1781 	uint64_t cb_numupgraded;
1782 	uint64_t cb_numsamegraded;
1783 	uint64_t cb_numfailed;
1784 	uint64_t cb_version;
1785 	boolean_t cb_newer;
1786 	boolean_t cb_foundone;
1787 	char cb_lastfs[ZFS_MAXNAMELEN];
1788 } upgrade_cbdata_t;
1789 
1790 static int
1791 same_pool(zfs_handle_t *zhp, const char *name)
1792 {
1793 	int len1 = strcspn(name, "/@");
1794 	const char *zhname = zfs_get_name(zhp);
1795 	int len2 = strcspn(zhname, "/@");
1796 
1797 	if (len1 != len2)
1798 		return (B_FALSE);
1799 	return (strncmp(name, zhname, len1) == 0);
1800 }
1801 
1802 static int
1803 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1804 {
1805 	upgrade_cbdata_t *cb = data;
1806 	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1807 
1808 	/* list if it's old/new */
1809 	if ((!cb->cb_newer && version < ZPL_VERSION) ||
1810 	    (cb->cb_newer && version > ZPL_VERSION)) {
1811 		char *str;
1812 		if (cb->cb_newer) {
1813 			str = gettext("The following filesystems are "
1814 			    "formatted using a newer software version and\n"
1815 			    "cannot be accessed on the current system.\n\n");
1816 		} else {
1817 			str = gettext("The following filesystems are "
1818 			    "out of date, and can be upgraded.  After being\n"
1819 			    "upgraded, these filesystems (and any 'zfs send' "
1820 			    "streams generated from\n"
1821 			    "subsequent snapshots) will no longer be "
1822 			    "accessible by older software versions.\n\n");
1823 		}
1824 
1825 		if (!cb->cb_foundone) {
1826 			(void) puts(str);
1827 			(void) printf(gettext("VER  FILESYSTEM\n"));
1828 			(void) printf(gettext("---  ------------\n"));
1829 			cb->cb_foundone = B_TRUE;
1830 		}
1831 
1832 		(void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1833 	}
1834 
1835 	return (0);
1836 }
1837 
1838 static int
1839 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1840 {
1841 	upgrade_cbdata_t *cb = data;
1842 	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1843 	int needed_spa_version;
1844 	int spa_version;
1845 
1846 	if (zfs_spa_version(zhp, &spa_version) < 0)
1847 		return (-1);
1848 
1849 	needed_spa_version = zfs_spa_version_map(cb->cb_version);
1850 
1851 	if (needed_spa_version < 0)
1852 		return (-1);
1853 
1854 	if (spa_version < needed_spa_version) {
1855 		/* can't upgrade */
1856 		(void) printf(gettext("%s: can not be "
1857 		    "upgraded; the pool version needs to first "
1858 		    "be upgraded\nto version %d\n\n"),
1859 		    zfs_get_name(zhp), needed_spa_version);
1860 		cb->cb_numfailed++;
1861 		return (0);
1862 	}
1863 
1864 	/* upgrade */
1865 	if (version < cb->cb_version) {
1866 		char verstr[16];
1867 		(void) snprintf(verstr, sizeof (verstr),
1868 		    "%llu", cb->cb_version);
1869 		if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1870 			/*
1871 			 * If they did "zfs upgrade -a", then we could
1872 			 * be doing ioctls to different pools.  We need
1873 			 * to log this history once to each pool.
1874 			 */
1875 			verify(zpool_stage_history(g_zfs, history_str) == 0);
1876 		}
1877 		if (zfs_prop_set(zhp, "version", verstr) == 0)
1878 			cb->cb_numupgraded++;
1879 		else
1880 			cb->cb_numfailed++;
1881 		(void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1882 	} else if (version > cb->cb_version) {
1883 		/* can't downgrade */
1884 		(void) printf(gettext("%s: can not be downgraded; "
1885 		    "it is already at version %u\n"),
1886 		    zfs_get_name(zhp), version);
1887 		cb->cb_numfailed++;
1888 	} else {
1889 		cb->cb_numsamegraded++;
1890 	}
1891 	return (0);
1892 }
1893 
1894 /*
1895  * zfs upgrade
1896  * zfs upgrade -v
1897  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1898  */
1899 static int
1900 zfs_do_upgrade(int argc, char **argv)
1901 {
1902 	boolean_t all = B_FALSE;
1903 	boolean_t showversions = B_FALSE;
1904 	int ret = 0;
1905 	upgrade_cbdata_t cb = { 0 };
1906 	char c;
1907 	int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1908 
1909 	/* check options */
1910 	while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1911 		switch (c) {
1912 		case 'r':
1913 			flags |= ZFS_ITER_RECURSE;
1914 			break;
1915 		case 'v':
1916 			showversions = B_TRUE;
1917 			break;
1918 		case 'V':
1919 			if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1920 			    optarg, &cb.cb_version) != 0) {
1921 				(void) fprintf(stderr,
1922 				    gettext("invalid version %s\n"), optarg);
1923 				usage(B_FALSE);
1924 			}
1925 			break;
1926 		case 'a':
1927 			all = B_TRUE;
1928 			break;
1929 		case '?':
1930 		default:
1931 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1932 			    optopt);
1933 			usage(B_FALSE);
1934 		}
1935 	}
1936 
1937 	argc -= optind;
1938 	argv += optind;
1939 
1940 	if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1941 		usage(B_FALSE);
1942 	if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1943 	    cb.cb_version || argc))
1944 		usage(B_FALSE);
1945 	if ((all || argc) && (showversions))
1946 		usage(B_FALSE);
1947 	if (all && argc)
1948 		usage(B_FALSE);
1949 
1950 	if (showversions) {
1951 		/* Show info on available versions. */
1952 		(void) printf(gettext("The following filesystem versions are "
1953 		    "supported:\n\n"));
1954 		(void) printf(gettext("VER  DESCRIPTION\n"));
1955 		(void) printf("---  -----------------------------------------"
1956 		    "---------------\n");
1957 		(void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1958 		(void) printf(gettext(" 2   Enhanced directory entries\n"));
1959 		(void) printf(gettext(" 3   Case insensitive and filesystem "
1960 		    "user identifier (FUID)\n"));
1961 		(void) printf(gettext(" 4   userquota, groupquota "
1962 		    "properties\n"));
1963 		(void) printf(gettext(" 5   System attributes\n"));
1964 		(void) printf(gettext("\nFor more information on a particular "
1965 		    "version, including supported releases,\n"));
1966 		(void) printf("see the ZFS Administration Guide.\n\n");
1967 		ret = 0;
1968 	} else if (argc || all) {
1969 		/* Upgrade filesystems */
1970 		if (cb.cb_version == 0)
1971 			cb.cb_version = ZPL_VERSION;
1972 		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1973 		    NULL, NULL, 0, upgrade_set_callback, &cb);
1974 		(void) printf(gettext("%llu filesystems upgraded\n"),
1975 		    cb.cb_numupgraded);
1976 		if (cb.cb_numsamegraded) {
1977 			(void) printf(gettext("%llu filesystems already at "
1978 			    "this version\n"),
1979 			    cb.cb_numsamegraded);
1980 		}
1981 		if (cb.cb_numfailed != 0)
1982 			ret = 1;
1983 	} else {
1984 		/* List old-version filesytems */
1985 		boolean_t found;
1986 		(void) printf(gettext("This system is currently running "
1987 		    "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1988 
1989 		flags |= ZFS_ITER_RECURSE;
1990 		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1991 		    NULL, NULL, 0, upgrade_list_callback, &cb);
1992 
1993 		found = cb.cb_foundone;
1994 		cb.cb_foundone = B_FALSE;
1995 		cb.cb_newer = B_TRUE;
1996 
1997 		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1998 		    NULL, NULL, 0, upgrade_list_callback, &cb);
1999 
2000 		if (!cb.cb_foundone && !found) {
2001 			(void) printf(gettext("All filesystems are "
2002 			    "formatted with the current version.\n"));
2003 		}
2004 	}
2005 
2006 	return (ret);
2007 }
2008 
2009 #define	USTYPE_USR_BIT (0)
2010 #define	USTYPE_GRP_BIT (1)
2011 #define	USTYPE_PSX_BIT (2)
2012 #define	USTYPE_SMB_BIT (3)
2013 
2014 #define	USTYPE_USR (1 << USTYPE_USR_BIT)
2015 #define	USTYPE_GRP (1 << USTYPE_GRP_BIT)
2016 
2017 #define	USTYPE_PSX (1 << USTYPE_PSX_BIT)
2018 #define	USTYPE_SMB (1 << USTYPE_SMB_BIT)
2019 
2020 #define	USTYPE_PSX_USR (USTYPE_PSX | USTYPE_USR)
2021 #define	USTYPE_SMB_USR (USTYPE_SMB | USTYPE_USR)
2022 #define	USTYPE_PSX_GRP (USTYPE_PSX | USTYPE_GRP)
2023 #define	USTYPE_SMB_GRP (USTYPE_SMB | USTYPE_GRP)
2024 #define	USTYPE_ALL (USTYPE_PSX_USR | USTYPE_SMB_USR \
2025 		| USTYPE_PSX_GRP | USTYPE_SMB_GRP)
2026 
2027 
2028 #define	USPROP_USED_BIT (0)
2029 #define	USPROP_QUOTA_BIT (1)
2030 
2031 #define	USPROP_USED (1 << USPROP_USED_BIT)
2032 #define	USPROP_QUOTA (1 << USPROP_QUOTA_BIT)
2033 
2034 typedef struct us_node {
2035 	nvlist_t	*usn_nvl;
2036 	uu_avl_node_t	usn_avlnode;
2037 	uu_list_node_t	usn_listnode;
2038 } us_node_t;
2039 
2040 typedef struct us_cbdata {
2041 	nvlist_t		**cb_nvlp;
2042 	uu_avl_pool_t		*cb_avl_pool;
2043 	uu_avl_t		*cb_avl;
2044 	boolean_t		cb_numname;
2045 	boolean_t		cb_nicenum;
2046 	boolean_t		cb_sid2posix;
2047 	zfs_userquota_prop_t	cb_prop;
2048 	zfs_sort_column_t	*cb_sortcol;
2049 	size_t			cb_max_typelen;
2050 	size_t			cb_max_namelen;
2051 	size_t			cb_max_usedlen;
2052 	size_t			cb_max_quotalen;
2053 } us_cbdata_t;
2054 
2055 typedef struct {
2056 	zfs_sort_column_t *si_sortcol;
2057 	boolean_t si_num_name;
2058 	boolean_t si_parsable;
2059 } us_sort_info_t;
2060 
2061 static int
2062 us_compare(const void *larg, const void *rarg, void *unused)
2063 {
2064 	const us_node_t *l = larg;
2065 	const us_node_t *r = rarg;
2066 	int rc = 0;
2067 	us_sort_info_t *si = (us_sort_info_t *)unused;
2068 	zfs_sort_column_t *sortcol = si->si_sortcol;
2069 	boolean_t num_name = si->si_num_name;
2070 	nvlist_t *lnvl = l->usn_nvl;
2071 	nvlist_t *rnvl = r->usn_nvl;
2072 
2073 	for (; sortcol != NULL; sortcol = sortcol->sc_next) {
2074 		char *lvstr = "";
2075 		char *rvstr = "";
2076 		uint32_t lv32 = 0;
2077 		uint32_t rv32 = 0;
2078 		uint64_t lv64 = 0;
2079 		uint64_t rv64 = 0;
2080 		zfs_prop_t prop = sortcol->sc_prop;
2081 		const char *propname = NULL;
2082 		boolean_t reverse = sortcol->sc_reverse;
2083 
2084 		switch (prop) {
2085 		case ZFS_PROP_TYPE:
2086 			propname = "type";
2087 			(void) nvlist_lookup_uint32(lnvl, propname, &lv32);
2088 			(void) nvlist_lookup_uint32(rnvl, propname, &rv32);
2089 			if (rv32 != lv32)
2090 				rc = (rv32 > lv32) ? 1 : -1;
2091 			break;
2092 		case ZFS_PROP_NAME:
2093 			propname = "name";
2094 			if (num_name) {
2095 				(void) nvlist_lookup_uint32(lnvl, propname,
2096 				    &lv32);
2097 				(void) nvlist_lookup_uint32(rnvl, propname,
2098 				    &rv32);
2099 				if (rv32 != lv32)
2100 					rc = (rv32 > lv32) ? 1 : -1;
2101 			} else {
2102 				(void) nvlist_lookup_string(lnvl, propname,
2103 				    &lvstr);
2104 				(void) nvlist_lookup_string(rnvl, propname,
2105 				    &rvstr);
2106 				rc = strcmp(lvstr, rvstr);
2107 			}
2108 			break;
2109 
2110 		case ZFS_PROP_USED:
2111 		case ZFS_PROP_QUOTA:
2112 			if (ZFS_PROP_USED == prop)
2113 				propname = "used";
2114 			else
2115 				propname = "quota";
2116 			(void) nvlist_lookup_uint64(lnvl, propname, &lv64);
2117 			(void) nvlist_lookup_uint64(rnvl, propname, &rv64);
2118 			if (rv64 != lv64)
2119 				rc = (rv64 > lv64) ? 1 : -1;
2120 		}
2121 
2122 		if (rc)
2123 			if (rc < 0)
2124 				return (reverse ? 1 : -1);
2125 			else
2126 				return (reverse ? -1 : 1);
2127 	}
2128 
2129 	return (rc);
2130 }
2131 
2132 static inline const char *
2133 us_type2str(unsigned field_type)
2134 {
2135 	switch (field_type) {
2136 	case USTYPE_PSX_USR:
2137 		return ("POSIX User");
2138 	case USTYPE_PSX_GRP:
2139 		return ("POSIX Group");
2140 	case USTYPE_SMB_USR:
2141 		return ("SMB User");
2142 	case USTYPE_SMB_GRP:
2143 		return ("SMB Group");
2144 	default:
2145 		return ("Undefined");
2146 	}
2147 }
2148 
2149 /*
2150  * zfs userspace
2151  */
2152 static int
2153 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
2154 {
2155 	us_cbdata_t *cb = (us_cbdata_t *)arg;
2156 	zfs_userquota_prop_t prop = cb->cb_prop;
2157 	char *name = NULL;
2158 	char *propname;
2159 	char namebuf[32];
2160 	char sizebuf[32];
2161 	us_node_t *node;
2162 	uu_avl_pool_t *avl_pool = cb->cb_avl_pool;
2163 	uu_avl_t *avl = cb->cb_avl;
2164 	uu_avl_index_t idx;
2165 	nvlist_t *props;
2166 	us_node_t *n;
2167 	zfs_sort_column_t *sortcol = cb->cb_sortcol;
2168 	unsigned type;
2169 	const char *typestr;
2170 	size_t namelen;
2171 	size_t typelen;
2172 	size_t sizelen;
2173 	us_sort_info_t sortinfo = { sortcol, cb->cb_numname };
2174 
2175 	if (domain == NULL || domain[0] == '\0') {
2176 		/* POSIX */
2177 		if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2178 			type = USTYPE_PSX_GRP;
2179 			struct group *g = getgrgid(rid);
2180 			if (g)
2181 				name = g->gr_name;
2182 		} else {
2183 			type = USTYPE_PSX_USR;
2184 			struct passwd *p = getpwuid(rid);
2185 			if (p)
2186 				name = p->pw_name;
2187 		}
2188 	} else {
2189 		char sid[ZFS_MAXNAMELEN+32];
2190 		uid_t id;
2191 		uint64_t classes;
2192 		int err = 0;
2193 		directory_error_t e;
2194 
2195 		(void) snprintf(sid, sizeof (sid), "%s-%u", domain, rid);
2196 		/* SMB */
2197 		if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2198 			type = USTYPE_SMB_GRP;
2199 			err = sid_to_id(sid, B_FALSE, &id);
2200 		} else {
2201 			type = USTYPE_SMB_USR;
2202 			err = sid_to_id(sid, B_TRUE, &id);
2203 		}
2204 
2205 		if (err == 0) {
2206 			rid = id;
2207 
2208 			e = directory_name_from_sid(NULL, sid, &name, &classes);
2209 			if (e != NULL) {
2210 				directory_error_free(e);
2211 				return (NULL);
2212 			}
2213 
2214 			if (name == NULL)
2215 				name = sid;
2216 		}
2217 	}
2218 
2219 /*
2220  *	if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA)
2221  *		ug = "group";
2222  *	else
2223  *		ug = "user";
2224  */
2225 
2226 	if (prop == ZFS_PROP_USERUSED || prop == ZFS_PROP_GROUPUSED)
2227 		propname = "used";
2228 	else
2229 		propname = "quota";
2230 
2231 	(void) snprintf(namebuf, sizeof (namebuf), "%u", rid);
2232 	if (name == NULL)
2233 		name = namebuf;
2234 
2235 	if (cb->cb_nicenum)
2236 		zfs_nicenum(space, sizebuf, sizeof (sizebuf));
2237 	else
2238 		(void) sprintf(sizebuf, "%llu", space);
2239 
2240 	node = safe_malloc(sizeof (us_node_t));
2241 	uu_avl_node_init(node, &node->usn_avlnode, avl_pool);
2242 
2243 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
2244 		free(node);
2245 		return (-1);
2246 	}
2247 
2248 	if (nvlist_add_uint32(props, "type", type) != 0)
2249 		nomem();
2250 
2251 	if (cb->cb_numname) {
2252 		if (nvlist_add_uint32(props, "name", rid) != 0)
2253 			nomem();
2254 		namelen = strlen(namebuf);
2255 	} else {
2256 		if (nvlist_add_string(props, "name", name) != 0)
2257 			nomem();
2258 		namelen = strlen(name);
2259 	}
2260 
2261 	typestr = us_type2str(type);
2262 	typelen = strlen(gettext(typestr));
2263 	if (typelen > cb->cb_max_typelen)
2264 		cb->cb_max_typelen  = typelen;
2265 
2266 	if (namelen > cb->cb_max_namelen)
2267 		cb->cb_max_namelen  = namelen;
2268 
2269 	sizelen = strlen(sizebuf);
2270 	if (0 == strcmp(propname, "used")) {
2271 		if (sizelen > cb->cb_max_usedlen)
2272 			cb->cb_max_usedlen  = sizelen;
2273 	} else {
2274 		if (sizelen > cb->cb_max_quotalen)
2275 			cb->cb_max_quotalen  = sizelen;
2276 	}
2277 
2278 	node->usn_nvl = props;
2279 
2280 	n = uu_avl_find(avl, node, &sortinfo, &idx);
2281 	if (n == NULL)
2282 		uu_avl_insert(avl, node, idx);
2283 	else {
2284 		nvlist_free(props);
2285 		free(node);
2286 		node = n;
2287 		props = node->usn_nvl;
2288 	}
2289 
2290 	if (nvlist_add_uint64(props, propname, space) != 0)
2291 		nomem();
2292 
2293 	return (0);
2294 }
2295 
2296 static inline boolean_t
2297 usprop_check(zfs_userquota_prop_t p, unsigned types, unsigned props)
2298 {
2299 	unsigned type;
2300 	unsigned prop;
2301 
2302 	switch (p) {
2303 	case ZFS_PROP_USERUSED:
2304 		type = USTYPE_USR;
2305 		prop = USPROP_USED;
2306 		break;
2307 	case ZFS_PROP_USERQUOTA:
2308 		type = USTYPE_USR;
2309 		prop = USPROP_QUOTA;
2310 		break;
2311 	case ZFS_PROP_GROUPUSED:
2312 		type = USTYPE_GRP;
2313 		prop = USPROP_USED;
2314 		break;
2315 	case ZFS_PROP_GROUPQUOTA:
2316 		type = USTYPE_GRP;
2317 		prop = USPROP_QUOTA;
2318 		break;
2319 	default: /* ALL */
2320 		return (B_TRUE);
2321 	};
2322 
2323 	return (type & types && prop & props);
2324 }
2325 
2326 #define	USFIELD_TYPE (1 << 0)
2327 #define	USFIELD_NAME (1 << 1)
2328 #define	USFIELD_USED (1 << 2)
2329 #define	USFIELD_QUOTA (1 << 3)
2330 #define	USFIELD_ALL (USFIELD_TYPE | USFIELD_NAME | USFIELD_USED | USFIELD_QUOTA)
2331 
2332 static int
2333 parsefields(unsigned *fieldsp, char **names, unsigned *bits, size_t len)
2334 {
2335 	char *field = optarg;
2336 	char *delim;
2337 
2338 	do {
2339 		int i;
2340 		boolean_t found = B_FALSE;
2341 		delim = strchr(field, ',');
2342 		if (delim != NULL)
2343 			*delim = '\0';
2344 
2345 		for (i = 0; i < len; i++)
2346 			if (0 == strcmp(field, names[i])) {
2347 				found = B_TRUE;
2348 				*fieldsp |= bits[i];
2349 				break;
2350 			}
2351 
2352 		if (!found) {
2353 			(void) fprintf(stderr, gettext("invalid type '%s'"
2354 			    "for -t option\n"), field);
2355 			return (-1);
2356 		}
2357 
2358 		field = delim + 1;
2359 	} while (delim);
2360 
2361 	return (0);
2362 }
2363 
2364 
2365 static char *type_names[] = { "posixuser", "smbuser", "posixgroup", "smbgroup",
2366 	"all" };
2367 static unsigned type_bits[] = {
2368 	USTYPE_PSX_USR,
2369 	USTYPE_SMB_USR,
2370 	USTYPE_PSX_GRP,
2371 	USTYPE_SMB_GRP,
2372 	USTYPE_ALL
2373 };
2374 
2375 static char *us_field_names[] = { "type", "name", "used", "quota" };
2376 static unsigned us_field_bits[] = {
2377 	USFIELD_TYPE,
2378 	USFIELD_NAME,
2379 	USFIELD_USED,
2380 	USFIELD_QUOTA
2381 };
2382 
2383 static void
2384 print_us_node(boolean_t scripted, boolean_t parseable, unsigned fields,
2385 		size_t type_width, size_t name_width, size_t used_width,
2386 		size_t quota_width, us_node_t *node)
2387 {
2388 	nvlist_t *nvl = node->usn_nvl;
2389 	nvpair_t *nvp = NULL;
2390 	char valstr[ZFS_MAXNAMELEN];
2391 	boolean_t first = B_TRUE;
2392 	boolean_t quota_found = B_FALSE;
2393 
2394 	if (fields & USFIELD_QUOTA && !nvlist_exists(nvl, "quota"))
2395 		if (nvlist_add_string(nvl, "quota", "none") != 0)
2396 			nomem();
2397 
2398 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
2399 		char *pname = nvpair_name(nvp);
2400 		data_type_t type = nvpair_type(nvp);
2401 		uint32_t val32 = 0;
2402 		uint64_t val64 = 0;
2403 		char *strval = NULL;
2404 		unsigned field = 0;
2405 		unsigned width = 0;
2406 		int i;
2407 		for (i = 0; i < 4; i++) {
2408 			if (0 == strcmp(pname, us_field_names[i])) {
2409 				field = us_field_bits[i];
2410 				break;
2411 			}
2412 		}
2413 
2414 		if (!(field & fields))
2415 			continue;
2416 
2417 		switch (type) {
2418 		case DATA_TYPE_UINT32:
2419 			(void) nvpair_value_uint32(nvp, &val32);
2420 			break;
2421 		case DATA_TYPE_UINT64:
2422 			(void) nvpair_value_uint64(nvp, &val64);
2423 			break;
2424 		case DATA_TYPE_STRING:
2425 			(void) nvpair_value_string(nvp, &strval);
2426 			break;
2427 		default:
2428 			(void) fprintf(stderr, "Invalid data type\n");
2429 		}
2430 
2431 		if (!first)
2432 			if (scripted)
2433 				(void) printf("\t");
2434 			else
2435 				(void) printf("  ");
2436 
2437 		switch (field) {
2438 		case USFIELD_TYPE:
2439 			strval = (char *)us_type2str(val32);
2440 			width = type_width;
2441 			break;
2442 		case USFIELD_NAME:
2443 			if (type == DATA_TYPE_UINT64) {
2444 				(void) sprintf(valstr, "%llu", val64);
2445 				strval = valstr;
2446 			}
2447 			width = name_width;
2448 			break;
2449 		case USFIELD_USED:
2450 		case USFIELD_QUOTA:
2451 			if (type == DATA_TYPE_UINT64) {
2452 				(void) nvpair_value_uint64(nvp, &val64);
2453 				if (parseable)
2454 					(void) sprintf(valstr, "%llu", val64);
2455 				else
2456 					zfs_nicenum(val64, valstr,
2457 					    sizeof (valstr));
2458 				strval = valstr;
2459 			}
2460 
2461 			if (field == USFIELD_USED)
2462 				width = used_width;
2463 			else {
2464 				quota_found = B_FALSE;
2465 				width = quota_width;
2466 			}
2467 
2468 			break;
2469 		}
2470 
2471 		if (field == USFIELD_QUOTA && !quota_found)
2472 			(void) printf("%*s", width, strval);
2473 		else {
2474 			if (type == DATA_TYPE_STRING)
2475 				(void) printf("%-*s", width, strval);
2476 			else
2477 				(void) printf("%*s", width, strval);
2478 		}
2479 
2480 		first = B_FALSE;
2481 
2482 	}
2483 
2484 	(void) printf("\n");
2485 }
2486 
2487 static void
2488 print_us(boolean_t scripted, boolean_t parsable, unsigned fields,
2489 		unsigned type_width, unsigned name_width, unsigned used_width,
2490 		unsigned quota_width, boolean_t rmnode, uu_avl_t *avl)
2491 {
2492 	static char *us_field_hdr[] = { "TYPE", "NAME", "USED", "QUOTA" };
2493 	us_node_t *node;
2494 	const char *col;
2495 	int i;
2496 	size_t width[4] = { type_width, name_width, used_width, quota_width };
2497 
2498 	if (!scripted) {
2499 		boolean_t first = B_TRUE;
2500 		for (i = 0; i < 4; i++) {
2501 			unsigned field = us_field_bits[i];
2502 			if (!(field & fields))
2503 				continue;
2504 
2505 			col = gettext(us_field_hdr[i]);
2506 			if (field == USFIELD_TYPE || field == USFIELD_NAME)
2507 				(void) printf(first?"%-*s":"  %-*s", width[i],
2508 				    col);
2509 			else
2510 				(void) printf(first?"%*s":"  %*s", width[i],
2511 				    col);
2512 			first = B_FALSE;
2513 		}
2514 		(void) printf("\n");
2515 	}
2516 
2517 	for (node = uu_avl_first(avl); node != NULL;
2518 	    node = uu_avl_next(avl, node)) {
2519 		print_us_node(scripted, parsable, fields, type_width,
2520 		    name_width, used_width, used_width, node);
2521 		if (rmnode)
2522 			nvlist_free(node->usn_nvl);
2523 	}
2524 }
2525 
2526 static int
2527 zfs_do_userspace(int argc, char **argv)
2528 {
2529 	zfs_handle_t *zhp;
2530 	zfs_userquota_prop_t p;
2531 	uu_avl_pool_t *avl_pool;
2532 	uu_avl_t *avl_tree;
2533 	uu_avl_walk_t *walk;
2534 
2535 	char *cmd;
2536 	boolean_t scripted = B_FALSE;
2537 	boolean_t prtnum = B_FALSE;
2538 	boolean_t parseable = B_FALSE;
2539 	boolean_t sid2posix = B_FALSE;
2540 	int error = 0;
2541 	int c;
2542 	zfs_sort_column_t *default_sortcol = NULL;
2543 	zfs_sort_column_t *sortcol = NULL;
2544 	unsigned types = USTYPE_PSX_USR | USTYPE_SMB_USR;
2545 	unsigned fields = 0;
2546 	unsigned props = USPROP_USED | USPROP_QUOTA;
2547 	us_cbdata_t cb;
2548 	us_node_t *node;
2549 	boolean_t resort_avl = B_FALSE;
2550 
2551 	if (argc < 2)
2552 		usage(B_FALSE);
2553 
2554 	cmd = argv[0];
2555 	if (0 == strcmp(cmd, "groupspace"))
2556 		/* toggle default group types */
2557 		types = USTYPE_PSX_GRP | USTYPE_SMB_GRP;
2558 
2559 	/* check options */
2560 	while ((c = getopt(argc, argv, "nHpo:s:S:t:i")) != -1) {
2561 		switch (c) {
2562 		case 'n':
2563 			prtnum = B_TRUE;
2564 			break;
2565 		case 'H':
2566 			scripted = B_TRUE;
2567 			break;
2568 		case 'p':
2569 			parseable = B_TRUE;
2570 			break;
2571 		case 'o':
2572 			if (parsefields(&fields, us_field_names, us_field_bits,
2573 			    4) != 0)
2574 				return (1);
2575 			break;
2576 		case 's':
2577 			if (zfs_add_sort_column(&sortcol, optarg,
2578 			    B_FALSE) != 0) {
2579 				(void) fprintf(stderr,
2580 				    gettext("invalid property '%s'\n"), optarg);
2581 				usage(B_FALSE);
2582 			}
2583 			break;
2584 		case 'S':
2585 			if (zfs_add_sort_column(&sortcol, optarg,
2586 			    B_TRUE) != 0) {
2587 				(void) fprintf(stderr,
2588 				    gettext("invalid property '%s'\n"), optarg);
2589 				usage(B_FALSE);
2590 			}
2591 			break;
2592 		case 't':
2593 			if (parsefields(&types, type_names, type_bits, 5))
2594 				return (1);
2595 			break;
2596 		case 'i':
2597 			sid2posix = B_TRUE;
2598 			break;
2599 		case ':':
2600 			(void) fprintf(stderr, gettext("missing argument for "
2601 			    "'%c' option\n"), optopt);
2602 			usage(B_FALSE);
2603 			break;
2604 		case '?':
2605 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2606 			    optopt);
2607 			usage(B_FALSE);
2608 		}
2609 	}
2610 
2611 	argc -= optind;
2612 	argv += optind;
2613 
2614 	/* ok, now we have sorted by default colums (type,name) avl tree */
2615 	if (sortcol) {
2616 		zfs_sort_column_t *sc;
2617 		for (sc = sortcol; sc; sc = sc->sc_next) {
2618 			if (sc->sc_prop == ZFS_PROP_QUOTA) {
2619 				resort_avl = B_TRUE;
2620 				break;
2621 			}
2622 		}
2623 	}
2624 
2625 	if (!fields)
2626 		fields = USFIELD_ALL;
2627 
2628 	if ((zhp = zfs_open(g_zfs, argv[argc-1], ZFS_TYPE_DATASET)) == NULL)
2629 		return (1);
2630 
2631 	if ((avl_pool = uu_avl_pool_create("us_avl_pool", sizeof (us_node_t),
2632 	    offsetof(us_node_t, usn_avlnode),
2633 	    us_compare, UU_DEFAULT)) == NULL)
2634 		nomem();
2635 	if ((avl_tree = uu_avl_create(avl_pool, NULL, UU_DEFAULT)) == NULL)
2636 		nomem();
2637 
2638 	if (sortcol && !resort_avl)
2639 		cb.cb_sortcol = sortcol;
2640 	else {
2641 		(void) zfs_add_sort_column(&default_sortcol, "type", B_FALSE);
2642 		(void) zfs_add_sort_column(&default_sortcol, "name", B_FALSE);
2643 		cb.cb_sortcol = default_sortcol;
2644 	}
2645 	cb.cb_numname = prtnum;
2646 	cb.cb_nicenum = !parseable;
2647 	cb.cb_avl_pool = avl_pool;
2648 	cb.cb_avl = avl_tree;
2649 	cb.cb_sid2posix = sid2posix;
2650 	cb.cb_max_typelen = strlen(gettext("TYPE"));
2651 	cb.cb_max_namelen = strlen(gettext("NAME"));
2652 	cb.cb_max_usedlen = strlen(gettext("USED"));
2653 	cb.cb_max_quotalen = strlen(gettext("QUOTA"));
2654 
2655 	for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
2656 		if (!usprop_check(p, types, props))
2657 			continue;
2658 
2659 		cb.cb_prop = p;
2660 		error = zfs_userspace(zhp, p, userspace_cb, &cb);
2661 		if (error)
2662 			break;
2663 	}
2664 
2665 
2666 	if (resort_avl) {
2667 		us_node_t *node;
2668 		us_node_t *rmnode;
2669 		uu_list_pool_t *listpool;
2670 		uu_list_t *list;
2671 		uu_avl_index_t idx = 0;
2672 		uu_list_index_t idx2 = 0;
2673 		listpool = uu_list_pool_create("tmplist", sizeof (us_node_t),
2674 		    offsetof(us_node_t, usn_listnode), NULL,
2675 		    UU_DEFAULT);
2676 		list = uu_list_create(listpool, NULL, UU_DEFAULT);
2677 
2678 		node = uu_avl_first(avl_tree);
2679 		uu_list_node_init(node, &node->usn_listnode, listpool);
2680 		while (node != NULL) {
2681 			rmnode = node;
2682 			node = uu_avl_next(avl_tree, node);
2683 			uu_avl_remove(avl_tree, rmnode);
2684 			if (uu_list_find(list, rmnode, NULL, &idx2) == NULL) {
2685 				uu_list_insert(list, rmnode, idx2);
2686 			}
2687 		}
2688 
2689 		for (node = uu_list_first(list); node != NULL;
2690 		    node = uu_list_next(list, node)) {
2691 			us_sort_info_t sortinfo = { sortcol, cb.cb_numname };
2692 			if (uu_avl_find(avl_tree, node, &sortinfo, &idx) ==
2693 			    NULL)
2694 			uu_avl_insert(avl_tree, node, idx);
2695 		}
2696 
2697 		uu_list_destroy(list);
2698 	}
2699 
2700 	/* print & free node`s nvlist memory */
2701 	print_us(scripted, parseable, fields, cb.cb_max_typelen,
2702 	    cb.cb_max_namelen, cb.cb_max_usedlen,
2703 	    cb.cb_max_quotalen, B_TRUE, cb.cb_avl);
2704 
2705 	if (sortcol)
2706 		zfs_free_sort_columns(sortcol);
2707 	zfs_free_sort_columns(default_sortcol);
2708 
2709 	/*
2710 	 * Finally, clean up the AVL tree.
2711 	 */
2712 	if ((walk = uu_avl_walk_start(cb.cb_avl, UU_WALK_ROBUST)) == NULL)
2713 		nomem();
2714 
2715 	while ((node = uu_avl_walk_next(walk)) != NULL) {
2716 		uu_avl_remove(cb.cb_avl, node);
2717 		free(node);
2718 	}
2719 
2720 	uu_avl_walk_end(walk);
2721 	uu_avl_destroy(avl_tree);
2722 	uu_avl_pool_destroy(avl_pool);
2723 
2724 	return (error);
2725 }
2726 
2727 /*
2728  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
2729  *      [-s property [-s property]...] [-S property [-S property]...]
2730  *      <dataset> ...
2731  *
2732  *	-r	Recurse over all children
2733  *	-d	Limit recursion by depth.
2734  *	-H	Scripted mode; elide headers and separate columns by tabs
2735  *	-o	Control which fields to display.
2736  *	-t	Control which object types to display.
2737  *	-s	Specify sort columns, descending order.
2738  *	-S	Specify sort columns, ascending order.
2739  *
2740  * When given no arguments, lists all filesystems in the system.
2741  * Otherwise, list the specified datasets, optionally recursing down them if
2742  * '-r' is specified.
2743  */
2744 typedef struct list_cbdata {
2745 	boolean_t	cb_first;
2746 	boolean_t	cb_scripted;
2747 	zprop_list_t	*cb_proplist;
2748 } list_cbdata_t;
2749 
2750 /*
2751  * Given a list of columns to display, output appropriate headers for each one.
2752  */
2753 static void
2754 print_header(zprop_list_t *pl)
2755 {
2756 	char headerbuf[ZFS_MAXPROPLEN];
2757 	const char *header;
2758 	int i;
2759 	boolean_t first = B_TRUE;
2760 	boolean_t right_justify;
2761 
2762 	for (; pl != NULL; pl = pl->pl_next) {
2763 		if (!first) {
2764 			(void) printf("  ");
2765 		} else {
2766 			first = B_FALSE;
2767 		}
2768 
2769 		right_justify = B_FALSE;
2770 		if (pl->pl_prop != ZPROP_INVAL) {
2771 			header = zfs_prop_column_name(pl->pl_prop);
2772 			right_justify = zfs_prop_align_right(pl->pl_prop);
2773 		} else {
2774 			for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
2775 				headerbuf[i] = toupper(pl->pl_user_prop[i]);
2776 			headerbuf[i] = '\0';
2777 			header = headerbuf;
2778 		}
2779 
2780 		if (pl->pl_next == NULL && !right_justify)
2781 			(void) printf("%s", header);
2782 		else if (right_justify)
2783 			(void) printf("%*s", pl->pl_width, header);
2784 		else
2785 			(void) printf("%-*s", pl->pl_width, header);
2786 	}
2787 
2788 	(void) printf("\n");
2789 }
2790 
2791 /*
2792  * Given a dataset and a list of fields, print out all the properties according
2793  * to the described layout.
2794  */
2795 static void
2796 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
2797 {
2798 	boolean_t first = B_TRUE;
2799 	char property[ZFS_MAXPROPLEN];
2800 	nvlist_t *userprops = zfs_get_user_props(zhp);
2801 	nvlist_t *propval;
2802 	char *propstr;
2803 	boolean_t right_justify;
2804 	int width;
2805 
2806 	for (; pl != NULL; pl = pl->pl_next) {
2807 		if (!first) {
2808 			if (scripted)
2809 				(void) printf("\t");
2810 			else
2811 				(void) printf("  ");
2812 		} else {
2813 			first = B_FALSE;
2814 		}
2815 
2816 		if (pl->pl_prop != ZPROP_INVAL) {
2817 			if (zfs_prop_get(zhp, pl->pl_prop, property,
2818 			    sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
2819 				propstr = "-";
2820 			else
2821 				propstr = property;
2822 
2823 			right_justify = zfs_prop_align_right(pl->pl_prop);
2824 		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
2825 			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
2826 			    property, sizeof (property), B_FALSE) != 0)
2827 				propstr = "-";
2828 			else
2829 				propstr = property;
2830 			right_justify = B_TRUE;
2831 		} else if (zfs_prop_written(pl->pl_user_prop)) {
2832 			if (zfs_prop_get_written(zhp, pl->pl_user_prop,
2833 			    property, sizeof (property), B_FALSE) != 0)
2834 				propstr = "-";
2835 			else
2836 				propstr = property;
2837 			right_justify = B_TRUE;
2838 		} else {
2839 			if (nvlist_lookup_nvlist(userprops,
2840 			    pl->pl_user_prop, &propval) != 0)
2841 				propstr = "-";
2842 			else
2843 				verify(nvlist_lookup_string(propval,
2844 				    ZPROP_VALUE, &propstr) == 0);
2845 			right_justify = B_FALSE;
2846 		}
2847 
2848 		width = pl->pl_width;
2849 
2850 		/*
2851 		 * If this is being called in scripted mode, or if this is the
2852 		 * last column and it is left-justified, don't include a width
2853 		 * format specifier.
2854 		 */
2855 		if (scripted || (pl->pl_next == NULL && !right_justify))
2856 			(void) printf("%s", propstr);
2857 		else if (right_justify)
2858 			(void) printf("%*s", width, propstr);
2859 		else
2860 			(void) printf("%-*s", width, propstr);
2861 	}
2862 
2863 	(void) printf("\n");
2864 }
2865 
2866 /*
2867  * Generic callback function to list a dataset or snapshot.
2868  */
2869 static int
2870 list_callback(zfs_handle_t *zhp, void *data)
2871 {
2872 	list_cbdata_t *cbp = data;
2873 
2874 	if (cbp->cb_first) {
2875 		if (!cbp->cb_scripted)
2876 			print_header(cbp->cb_proplist);
2877 		cbp->cb_first = B_FALSE;
2878 	}
2879 
2880 	print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
2881 
2882 	return (0);
2883 }
2884 
2885 static int
2886 zfs_do_list(int argc, char **argv)
2887 {
2888 	int c;
2889 	boolean_t scripted = B_FALSE;
2890 	static char default_fields[] =
2891 	    "name,used,available,referenced,mountpoint";
2892 	int types = ZFS_TYPE_DATASET;
2893 	boolean_t types_specified = B_FALSE;
2894 	char *fields = NULL;
2895 	list_cbdata_t cb = { 0 };
2896 	char *value;
2897 	int limit = 0;
2898 	int ret = 0;
2899 	zfs_sort_column_t *sortcol = NULL;
2900 	int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
2901 
2902 	/* check options */
2903 	while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
2904 		switch (c) {
2905 		case 'o':
2906 			fields = optarg;
2907 			break;
2908 		case 'd':
2909 			limit = parse_depth(optarg, &flags);
2910 			break;
2911 		case 'r':
2912 			flags |= ZFS_ITER_RECURSE;
2913 			break;
2914 		case 'H':
2915 			scripted = B_TRUE;
2916 			break;
2917 		case 's':
2918 			if (zfs_add_sort_column(&sortcol, optarg,
2919 			    B_FALSE) != 0) {
2920 				(void) fprintf(stderr,
2921 				    gettext("invalid property '%s'\n"), optarg);
2922 				usage(B_FALSE);
2923 			}
2924 			break;
2925 		case 'S':
2926 			if (zfs_add_sort_column(&sortcol, optarg,
2927 			    B_TRUE) != 0) {
2928 				(void) fprintf(stderr,
2929 				    gettext("invalid property '%s'\n"), optarg);
2930 				usage(B_FALSE);
2931 			}
2932 			break;
2933 		case 't':
2934 			types = 0;
2935 			types_specified = B_TRUE;
2936 			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
2937 			while (*optarg != '\0') {
2938 				static char *type_subopts[] = { "filesystem",
2939 				    "volume", "snapshot", "all", NULL };
2940 
2941 				switch (getsubopt(&optarg, type_subopts,
2942 				    &value)) {
2943 				case 0:
2944 					types |= ZFS_TYPE_FILESYSTEM;
2945 					break;
2946 				case 1:
2947 					types |= ZFS_TYPE_VOLUME;
2948 					break;
2949 				case 2:
2950 					types |= ZFS_TYPE_SNAPSHOT;
2951 					break;
2952 				case 3:
2953 					types = ZFS_TYPE_DATASET;
2954 					break;
2955 
2956 				default:
2957 					(void) fprintf(stderr,
2958 					    gettext("invalid type '%s'\n"),
2959 					    value);
2960 					usage(B_FALSE);
2961 				}
2962 			}
2963 			break;
2964 		case ':':
2965 			(void) fprintf(stderr, gettext("missing argument for "
2966 			    "'%c' option\n"), optopt);
2967 			usage(B_FALSE);
2968 			break;
2969 		case '?':
2970 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2971 			    optopt);
2972 			usage(B_FALSE);
2973 		}
2974 	}
2975 
2976 	argc -= optind;
2977 	argv += optind;
2978 
2979 	if (fields == NULL)
2980 		fields = default_fields;
2981 
2982 	/*
2983 	 * If "-o space" and no types were specified, don't display snapshots.
2984 	 */
2985 	if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
2986 		types &= ~ZFS_TYPE_SNAPSHOT;
2987 
2988 	/*
2989 	 * If the user specifies '-o all', the zprop_get_list() doesn't
2990 	 * normally include the name of the dataset.  For 'zfs list', we always
2991 	 * want this property to be first.
2992 	 */
2993 	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
2994 	    != 0)
2995 		usage(B_FALSE);
2996 
2997 	cb.cb_scripted = scripted;
2998 	cb.cb_first = B_TRUE;
2999 
3000 	ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
3001 	    limit, list_callback, &cb);
3002 
3003 	zprop_free_list(cb.cb_proplist);
3004 	zfs_free_sort_columns(sortcol);
3005 
3006 	if (ret == 0 && cb.cb_first && !cb.cb_scripted)
3007 		(void) printf(gettext("no datasets available\n"));
3008 
3009 	return (ret);
3010 }
3011 
3012 /*
3013  * zfs rename <fs | snap | vol> <fs | snap | vol>
3014  * zfs rename -p <fs | vol> <fs | vol>
3015  * zfs rename -r <snap> <snap>
3016  *
3017  * Renames the given dataset to another of the same type.
3018  *
3019  * The '-p' flag creates all the non-existing ancestors of the target first.
3020  */
3021 /* ARGSUSED */
3022 static int
3023 zfs_do_rename(int argc, char **argv)
3024 {
3025 	zfs_handle_t *zhp;
3026 	int c;
3027 	int ret = 0;
3028 	boolean_t recurse = B_FALSE;
3029 	boolean_t parents = B_FALSE;
3030 
3031 	/* check options */
3032 	while ((c = getopt(argc, argv, "pr")) != -1) {
3033 		switch (c) {
3034 		case 'p':
3035 			parents = B_TRUE;
3036 			break;
3037 		case 'r':
3038 			recurse = B_TRUE;
3039 			break;
3040 		case '?':
3041 		default:
3042 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3043 			    optopt);
3044 			usage(B_FALSE);
3045 		}
3046 	}
3047 
3048 	argc -= optind;
3049 	argv += optind;
3050 
3051 	/* check number of arguments */
3052 	if (argc < 1) {
3053 		(void) fprintf(stderr, gettext("missing source dataset "
3054 		    "argument\n"));
3055 		usage(B_FALSE);
3056 	}
3057 	if (argc < 2) {
3058 		(void) fprintf(stderr, gettext("missing target dataset "
3059 		    "argument\n"));
3060 		usage(B_FALSE);
3061 	}
3062 	if (argc > 2) {
3063 		(void) fprintf(stderr, gettext("too many arguments\n"));
3064 		usage(B_FALSE);
3065 	}
3066 
3067 	if (recurse && parents) {
3068 		(void) fprintf(stderr, gettext("-p and -r options are mutually "
3069 		    "exclusive\n"));
3070 		usage(B_FALSE);
3071 	}
3072 
3073 	if (recurse && strchr(argv[0], '@') == 0) {
3074 		(void) fprintf(stderr, gettext("source dataset for recursive "
3075 		    "rename must be a snapshot\n"));
3076 		usage(B_FALSE);
3077 	}
3078 
3079 	if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
3080 	    ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
3081 		return (1);
3082 
3083 	/* If we were asked and the name looks good, try to create ancestors. */
3084 	if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
3085 	    zfs_create_ancestors(g_zfs, argv[1]) != 0) {
3086 		zfs_close(zhp);
3087 		return (1);
3088 	}
3089 
3090 	ret = (zfs_rename(zhp, argv[1], recurse) != 0);
3091 
3092 	zfs_close(zhp);
3093 	return (ret);
3094 }
3095 
3096 /*
3097  * zfs promote <fs>
3098  *
3099  * Promotes the given clone fs to be the parent
3100  */
3101 /* ARGSUSED */
3102 static int
3103 zfs_do_promote(int argc, char **argv)
3104 {
3105 	zfs_handle_t *zhp;
3106 	int ret = 0;
3107 
3108 	/* check options */
3109 	if (argc > 1 && argv[1][0] == '-') {
3110 		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3111 		    argv[1][1]);
3112 		usage(B_FALSE);
3113 	}
3114 
3115 	/* check number of arguments */
3116 	if (argc < 2) {
3117 		(void) fprintf(stderr, gettext("missing clone filesystem"
3118 		    " argument\n"));
3119 		usage(B_FALSE);
3120 	}
3121 	if (argc > 2) {
3122 		(void) fprintf(stderr, gettext("too many arguments\n"));
3123 		usage(B_FALSE);
3124 	}
3125 
3126 	zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3127 	if (zhp == NULL)
3128 		return (1);
3129 
3130 	ret = (zfs_promote(zhp) != 0);
3131 
3132 
3133 	zfs_close(zhp);
3134 	return (ret);
3135 }
3136 
3137 /*
3138  * zfs rollback [-rRf] <snapshot>
3139  *
3140  *	-r	Delete any intervening snapshots before doing rollback
3141  *	-R	Delete any snapshots and their clones
3142  *	-f	ignored for backwards compatability
3143  *
3144  * Given a filesystem, rollback to a specific snapshot, discarding any changes
3145  * since then and making it the active dataset.  If more recent snapshots exist,
3146  * the command will complain unless the '-r' flag is given.
3147  */
3148 typedef struct rollback_cbdata {
3149 	uint64_t	cb_create;
3150 	boolean_t	cb_first;
3151 	int		cb_doclones;
3152 	char		*cb_target;
3153 	int		cb_error;
3154 	boolean_t	cb_recurse;
3155 	boolean_t	cb_dependent;
3156 } rollback_cbdata_t;
3157 
3158 /*
3159  * Report any snapshots more recent than the one specified.  Used when '-r' is
3160  * not specified.  We reuse this same callback for the snapshot dependents - if
3161  * 'cb_dependent' is set, then this is a dependent and we should report it
3162  * without checking the transaction group.
3163  */
3164 static int
3165 rollback_check(zfs_handle_t *zhp, void *data)
3166 {
3167 	rollback_cbdata_t *cbp = data;
3168 
3169 	if (cbp->cb_doclones) {
3170 		zfs_close(zhp);
3171 		return (0);
3172 	}
3173 
3174 	if (!cbp->cb_dependent) {
3175 		if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
3176 		    zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3177 		    zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3178 		    cbp->cb_create) {
3179 
3180 			if (cbp->cb_first && !cbp->cb_recurse) {
3181 				(void) fprintf(stderr, gettext("cannot "
3182 				    "rollback to '%s': more recent snapshots "
3183 				    "exist\n"),
3184 				    cbp->cb_target);
3185 				(void) fprintf(stderr, gettext("use '-r' to "
3186 				    "force deletion of the following "
3187 				    "snapshots:\n"));
3188 				cbp->cb_first = 0;
3189 				cbp->cb_error = 1;
3190 			}
3191 
3192 			if (cbp->cb_recurse) {
3193 				cbp->cb_dependent = B_TRUE;
3194 				if (zfs_iter_dependents(zhp, B_TRUE,
3195 				    rollback_check, cbp) != 0) {
3196 					zfs_close(zhp);
3197 					return (-1);
3198 				}
3199 				cbp->cb_dependent = B_FALSE;
3200 			} else {
3201 				(void) fprintf(stderr, "%s\n",
3202 				    zfs_get_name(zhp));
3203 			}
3204 		}
3205 	} else {
3206 		if (cbp->cb_first && cbp->cb_recurse) {
3207 			(void) fprintf(stderr, gettext("cannot rollback to "
3208 			    "'%s': clones of previous snapshots exist\n"),
3209 			    cbp->cb_target);
3210 			(void) fprintf(stderr, gettext("use '-R' to "
3211 			    "force deletion of the following clones and "
3212 			    "dependents:\n"));
3213 			cbp->cb_first = 0;
3214 			cbp->cb_error = 1;
3215 		}
3216 
3217 		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
3218 	}
3219 
3220 	zfs_close(zhp);
3221 	return (0);
3222 }
3223 
3224 static int
3225 zfs_do_rollback(int argc, char **argv)
3226 {
3227 	int ret = 0;
3228 	int c;
3229 	boolean_t force = B_FALSE;
3230 	rollback_cbdata_t cb = { 0 };
3231 	zfs_handle_t *zhp, *snap;
3232 	char parentname[ZFS_MAXNAMELEN];
3233 	char *delim;
3234 
3235 	/* check options */
3236 	while ((c = getopt(argc, argv, "rRf")) != -1) {
3237 		switch (c) {
3238 		case 'r':
3239 			cb.cb_recurse = 1;
3240 			break;
3241 		case 'R':
3242 			cb.cb_recurse = 1;
3243 			cb.cb_doclones = 1;
3244 			break;
3245 		case 'f':
3246 			force = B_TRUE;
3247 			break;
3248 		case '?':
3249 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3250 			    optopt);
3251 			usage(B_FALSE);
3252 		}
3253 	}
3254 
3255 	argc -= optind;
3256 	argv += optind;
3257 
3258 	/* check number of arguments */
3259 	if (argc < 1) {
3260 		(void) fprintf(stderr, gettext("missing dataset argument\n"));
3261 		usage(B_FALSE);
3262 	}
3263 	if (argc > 1) {
3264 		(void) fprintf(stderr, gettext("too many arguments\n"));
3265 		usage(B_FALSE);
3266 	}
3267 
3268 	/* open the snapshot */
3269 	if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
3270 		return (1);
3271 
3272 	/* open the parent dataset */
3273 	(void) strlcpy(parentname, argv[0], sizeof (parentname));
3274 	verify((delim = strrchr(parentname, '@')) != NULL);
3275 	*delim = '\0';
3276 	if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
3277 		zfs_close(snap);
3278 		return (1);
3279 	}
3280 
3281 	/*
3282 	 * Check for more recent snapshots and/or clones based on the presence
3283 	 * of '-r' and '-R'.
3284 	 */
3285 	cb.cb_target = argv[0];
3286 	cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3287 	cb.cb_first = B_TRUE;
3288 	cb.cb_error = 0;
3289 	if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
3290 		goto out;
3291 
3292 	if ((ret = cb.cb_error) != 0)
3293 		goto out;
3294 
3295 	/*
3296 	 * Rollback parent to the given snapshot.
3297 	 */
3298 	ret = zfs_rollback(zhp, snap, force);
3299 
3300 out:
3301 	zfs_close(snap);
3302 	zfs_close(zhp);
3303 
3304 	if (ret == 0)
3305 		return (0);
3306 	else
3307 		return (1);
3308 }
3309 
3310 /*
3311  * zfs set property=value { fs | snap | vol } ...
3312  *
3313  * Sets the given property for all datasets specified on the command line.
3314  */
3315 typedef struct set_cbdata {
3316 	char		*cb_propname;
3317 	char		*cb_value;
3318 } set_cbdata_t;
3319 
3320 static int
3321 set_callback(zfs_handle_t *zhp, void *data)
3322 {
3323 	set_cbdata_t *cbp = data;
3324 
3325 	if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
3326 		switch (libzfs_errno(g_zfs)) {
3327 		case EZFS_MOUNTFAILED:
3328 			(void) fprintf(stderr, gettext("property may be set "
3329 			    "but unable to remount filesystem\n"));
3330 			break;
3331 		case EZFS_SHARENFSFAILED:
3332 			(void) fprintf(stderr, gettext("property may be set "
3333 			    "but unable to reshare filesystem\n"));
3334 			break;
3335 		}
3336 		return (1);
3337 	}
3338 	return (0);
3339 }
3340 
3341 static int
3342 zfs_do_set(int argc, char **argv)
3343 {
3344 	set_cbdata_t cb;
3345 	int ret = 0;
3346 
3347 	/* check for options */
3348 	if (argc > 1 && argv[1][0] == '-') {
3349 		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3350 		    argv[1][1]);
3351 		usage(B_FALSE);
3352 	}
3353 
3354 	/* check number of arguments */
3355 	if (argc < 2) {
3356 		(void) fprintf(stderr, gettext("missing property=value "
3357 		    "argument\n"));
3358 		usage(B_FALSE);
3359 	}
3360 	if (argc < 3) {
3361 		(void) fprintf(stderr, gettext("missing dataset name\n"));
3362 		usage(B_FALSE);
3363 	}
3364 
3365 	/* validate property=value argument */
3366 	cb.cb_propname = argv[1];
3367 	if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
3368 	    (cb.cb_value[1] == '\0')) {
3369 		(void) fprintf(stderr, gettext("missing value in "
3370 		    "property=value argument\n"));
3371 		usage(B_FALSE);
3372 	}
3373 
3374 	*cb.cb_value = '\0';
3375 	cb.cb_value++;
3376 
3377 	if (*cb.cb_propname == '\0') {
3378 		(void) fprintf(stderr,
3379 		    gettext("missing property in property=value argument\n"));
3380 		usage(B_FALSE);
3381 	}
3382 
3383 	ret = zfs_for_each(argc - 2, argv + 2, NULL,
3384 	    ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
3385 
3386 	return (ret);
3387 }
3388 
3389 /*
3390  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
3391  *
3392  * Creates a snapshot with the given name.  While functionally equivalent to
3393  * 'zfs create', it is a separate command to differentiate intent.
3394  */
3395 static int
3396 zfs_do_snapshot(int argc, char **argv)
3397 {
3398 	boolean_t recursive = B_FALSE;
3399 	int ret = 0;
3400 	char c;
3401 	nvlist_t *props;
3402 
3403 	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3404 		nomem();
3405 
3406 	/* check options */
3407 	while ((c = getopt(argc, argv, "ro:")) != -1) {
3408 		switch (c) {
3409 		case 'o':
3410 			if (parseprop(props))
3411 				return (1);
3412 			break;
3413 		case 'r':
3414 			recursive = B_TRUE;
3415 			break;
3416 		case '?':
3417 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3418 			    optopt);
3419 			goto usage;
3420 		}
3421 	}
3422 
3423 	argc -= optind;
3424 	argv += optind;
3425 
3426 	/* check number of arguments */
3427 	if (argc < 1) {
3428 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
3429 		goto usage;
3430 	}
3431 	if (argc > 1) {
3432 		(void) fprintf(stderr, gettext("too many arguments\n"));
3433 		goto usage;
3434 	}
3435 
3436 	ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
3437 	nvlist_free(props);
3438 	if (ret && recursive)
3439 		(void) fprintf(stderr, gettext("no snapshots were created\n"));
3440 	return (ret != 0);
3441 
3442 usage:
3443 	nvlist_free(props);
3444 	usage(B_FALSE);
3445 	return (-1);
3446 }
3447 
3448 /*
3449  * Send a backup stream to stdout.
3450  */
3451 static int
3452 zfs_do_send(int argc, char **argv)
3453 {
3454 	char *fromname = NULL;
3455 	char *toname = NULL;
3456 	char *cp;
3457 	zfs_handle_t *zhp;
3458 	sendflags_t flags = { 0 };
3459 	int c, err;
3460 	nvlist_t *dbgnv = NULL;
3461 	boolean_t extraverbose = B_FALSE;
3462 
3463 	/* check options */
3464 	while ((c = getopt(argc, argv, ":i:I:RDpvnP")) != -1) {
3465 		switch (c) {
3466 		case 'i':
3467 			if (fromname)
3468 				usage(B_FALSE);
3469 			fromname = optarg;
3470 			break;
3471 		case 'I':
3472 			if (fromname)
3473 				usage(B_FALSE);
3474 			fromname = optarg;
3475 			flags.doall = B_TRUE;
3476 			break;
3477 		case 'R':
3478 			flags.replicate = B_TRUE;
3479 			break;
3480 		case 'p':
3481 			flags.props = B_TRUE;
3482 			break;
3483 		case 'P':
3484 			flags.parsable = B_TRUE;
3485 			flags.verbose = B_TRUE;
3486 			break;
3487 		case 'v':
3488 			if (flags.verbose)
3489 				extraverbose = B_TRUE;
3490 			flags.verbose = B_TRUE;
3491 			break;
3492 		case 'D':
3493 			flags.dedup = B_TRUE;
3494 			break;
3495 		case 'n':
3496 			flags.dryrun = B_TRUE;
3497 			break;
3498 		case ':':
3499 			(void) fprintf(stderr, gettext("missing argument for "
3500 			    "'%c' option\n"), optopt);
3501 			usage(B_FALSE);
3502 			break;
3503 		case '?':
3504 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3505 			    optopt);
3506 			usage(B_FALSE);
3507 		}
3508 	}
3509 
3510 	argc -= optind;
3511 	argv += optind;
3512 
3513 	/* check number of arguments */
3514 	if (argc < 1) {
3515 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
3516 		usage(B_FALSE);
3517 	}
3518 	if (argc > 1) {
3519 		(void) fprintf(stderr, gettext("too many arguments\n"));
3520 		usage(B_FALSE);
3521 	}
3522 
3523 	if (!flags.dryrun && isatty(STDOUT_FILENO)) {
3524 		(void) fprintf(stderr,
3525 		    gettext("Error: Stream can not be written to a terminal.\n"
3526 		    "You must redirect standard output.\n"));
3527 		return (1);
3528 	}
3529 
3530 	cp = strchr(argv[0], '@');
3531 	if (cp == NULL) {
3532 		(void) fprintf(stderr,
3533 		    gettext("argument must be a snapshot\n"));
3534 		usage(B_FALSE);
3535 	}
3536 	*cp = '\0';
3537 	toname = cp + 1;
3538 	zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3539 	if (zhp == NULL)
3540 		return (1);
3541 
3542 	/*
3543 	 * If they specified the full path to the snapshot, chop off
3544 	 * everything except the short name of the snapshot, but special
3545 	 * case if they specify the origin.
3546 	 */
3547 	if (fromname && (cp = strchr(fromname, '@')) != NULL) {
3548 		char origin[ZFS_MAXNAMELEN];
3549 		zprop_source_t src;
3550 
3551 		(void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
3552 		    origin, sizeof (origin), &src, NULL, 0, B_FALSE);
3553 
3554 		if (strcmp(origin, fromname) == 0) {
3555 			fromname = NULL;
3556 			flags.fromorigin = B_TRUE;
3557 		} else {
3558 			*cp = '\0';
3559 			if (cp != fromname && strcmp(argv[0], fromname)) {
3560 				(void) fprintf(stderr,
3561 				    gettext("incremental source must be "
3562 				    "in same filesystem\n"));
3563 				usage(B_FALSE);
3564 			}
3565 			fromname = cp + 1;
3566 			if (strchr(fromname, '@') || strchr(fromname, '/')) {
3567 				(void) fprintf(stderr,
3568 				    gettext("invalid incremental source\n"));
3569 				usage(B_FALSE);
3570 			}
3571 		}
3572 	}
3573 
3574 	if (flags.replicate && fromname == NULL)
3575 		flags.doall = B_TRUE;
3576 
3577 	err = zfs_send(zhp, fromname, toname, &flags, STDOUT_FILENO, NULL, 0,
3578 	    extraverbose ? &dbgnv : NULL);
3579 
3580 	if (extraverbose && dbgnv != NULL) {
3581 		/*
3582 		 * dump_nvlist prints to stdout, but that's been
3583 		 * redirected to a file.  Make it print to stderr
3584 		 * instead.
3585 		 */
3586 		(void) dup2(STDERR_FILENO, STDOUT_FILENO);
3587 		dump_nvlist(dbgnv, 0);
3588 		nvlist_free(dbgnv);
3589 	}
3590 	zfs_close(zhp);
3591 
3592 	return (err != 0);
3593 }
3594 
3595 /*
3596  * zfs receive [-vnFu] [-d | -e] <fs@snap>
3597  *
3598  * Restore a backup stream from stdin.
3599  */
3600 static int
3601 zfs_do_receive(int argc, char **argv)
3602 {
3603 	int c, err;
3604 	recvflags_t flags = { 0 };
3605 
3606 	/* check options */
3607 	while ((c = getopt(argc, argv, ":denuvF")) != -1) {
3608 		switch (c) {
3609 		case 'd':
3610 			flags.isprefix = B_TRUE;
3611 			break;
3612 		case 'e':
3613 			flags.isprefix = B_TRUE;
3614 			flags.istail = B_TRUE;
3615 			break;
3616 		case 'n':
3617 			flags.dryrun = B_TRUE;
3618 			break;
3619 		case 'u':
3620 			flags.nomount = B_TRUE;
3621 			break;
3622 		case 'v':
3623 			flags.verbose = B_TRUE;
3624 			break;
3625 		case 'F':
3626 			flags.force = B_TRUE;
3627 			break;
3628 		case ':':
3629 			(void) fprintf(stderr, gettext("missing argument for "
3630 			    "'%c' option\n"), optopt);
3631 			usage(B_FALSE);
3632 			break;
3633 		case '?':
3634 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3635 			    optopt);
3636 			usage(B_FALSE);
3637 		}
3638 	}
3639 
3640 	argc -= optind;
3641 	argv += optind;
3642 
3643 	/* check number of arguments */
3644 	if (argc < 1) {
3645 		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
3646 		usage(B_FALSE);
3647 	}
3648 	if (argc > 1) {
3649 		(void) fprintf(stderr, gettext("too many arguments\n"));
3650 		usage(B_FALSE);
3651 	}
3652 
3653 	if (isatty(STDIN_FILENO)) {
3654 		(void) fprintf(stderr,
3655 		    gettext("Error: Backup stream can not be read "
3656 		    "from a terminal.\n"
3657 		    "You must redirect standard input.\n"));
3658 		return (1);
3659 	}
3660 
3661 	err = zfs_receive(g_zfs, argv[0], &flags, STDIN_FILENO, NULL);
3662 
3663 	return (err != 0);
3664 }
3665 
3666 /*
3667  * allow/unallow stuff
3668  */
3669 /* copied from zfs/sys/dsl_deleg.h */
3670 #define	ZFS_DELEG_PERM_CREATE		"create"
3671 #define	ZFS_DELEG_PERM_DESTROY		"destroy"
3672 #define	ZFS_DELEG_PERM_SNAPSHOT		"snapshot"
3673 #define	ZFS_DELEG_PERM_ROLLBACK		"rollback"
3674 #define	ZFS_DELEG_PERM_CLONE		"clone"
3675 #define	ZFS_DELEG_PERM_PROMOTE		"promote"
3676 #define	ZFS_DELEG_PERM_RENAME		"rename"
3677 #define	ZFS_DELEG_PERM_MOUNT		"mount"
3678 #define	ZFS_DELEG_PERM_SHARE		"share"
3679 #define	ZFS_DELEG_PERM_SEND		"send"
3680 #define	ZFS_DELEG_PERM_RECEIVE		"receive"
3681 #define	ZFS_DELEG_PERM_ALLOW		"allow"
3682 #define	ZFS_DELEG_PERM_USERPROP		"userprop"
3683 #define	ZFS_DELEG_PERM_VSCAN		"vscan" /* ??? */
3684 #define	ZFS_DELEG_PERM_USERQUOTA	"userquota"
3685 #define	ZFS_DELEG_PERM_GROUPQUOTA	"groupquota"
3686 #define	ZFS_DELEG_PERM_USERUSED		"userused"
3687 #define	ZFS_DELEG_PERM_GROUPUSED	"groupused"
3688 #define	ZFS_DELEG_PERM_HOLD		"hold"
3689 #define	ZFS_DELEG_PERM_RELEASE		"release"
3690 #define	ZFS_DELEG_PERM_DIFF		"diff"
3691 
3692 #define	ZFS_NUM_DELEG_NOTES ZFS_DELEG_NOTE_NONE
3693 
3694 static zfs_deleg_perm_tab_t zfs_deleg_perm_tbl[] = {
3695 	{ ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW },
3696 	{ ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
3697 	{ ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
3698 	{ ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
3699 	{ ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
3700 	{ ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
3701 	{ ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
3702 	{ ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
3703 	{ ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
3704 	{ ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
3705 	{ ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
3706 	{ ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
3707 	{ ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND },
3708 	{ ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
3709 	{ ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
3710 
3711 	{ ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
3712 	{ ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
3713 	{ ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
3714 	{ ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
3715 	{ ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
3716 	{ NULL, ZFS_DELEG_NOTE_NONE }
3717 };
3718 
3719 /* permission structure */
3720 typedef struct deleg_perm {
3721 	zfs_deleg_who_type_t	dp_who_type;
3722 	const char		*dp_name;
3723 	boolean_t		dp_local;
3724 	boolean_t		dp_descend;
3725 } deleg_perm_t;
3726 
3727 /* */
3728 typedef struct deleg_perm_node {
3729 	deleg_perm_t		dpn_perm;
3730 
3731 	uu_avl_node_t		dpn_avl_node;
3732 } deleg_perm_node_t;
3733 
3734 typedef struct fs_perm fs_perm_t;
3735 
3736 /* permissions set */
3737 typedef struct who_perm {
3738 	zfs_deleg_who_type_t	who_type;
3739 	const char		*who_name;		/* id */
3740 	char			who_ug_name[256];	/* user/group name */
3741 	fs_perm_t		*who_fsperm;		/* uplink */
3742 
3743 	uu_avl_t		*who_deleg_perm_avl;	/* permissions */
3744 } who_perm_t;
3745 
3746 /* */
3747 typedef struct who_perm_node {
3748 	who_perm_t	who_perm;
3749 	uu_avl_node_t	who_avl_node;
3750 } who_perm_node_t;
3751 
3752 typedef struct fs_perm_set fs_perm_set_t;
3753 /* fs permissions */
3754 struct fs_perm {
3755 	const char		*fsp_name;
3756 
3757 	uu_avl_t		*fsp_sc_avl;	/* sets,create */
3758 	uu_avl_t		*fsp_uge_avl;	/* user,group,everyone */
3759 
3760 	fs_perm_set_t		*fsp_set;	/* uplink */
3761 };
3762 
3763 /* */
3764 typedef struct fs_perm_node {
3765 	fs_perm_t	fspn_fsperm;
3766 	uu_avl_t	*fspn_avl;
3767 
3768 	uu_list_node_t	fspn_list_node;
3769 } fs_perm_node_t;
3770 
3771 /* top level structure */
3772 struct fs_perm_set {
3773 	uu_list_pool_t	*fsps_list_pool;
3774 	uu_list_t	*fsps_list; /* list of fs_perms */
3775 
3776 	uu_avl_pool_t	*fsps_named_set_avl_pool;
3777 	uu_avl_pool_t	*fsps_who_perm_avl_pool;
3778 	uu_avl_pool_t	*fsps_deleg_perm_avl_pool;
3779 };
3780 
3781 static inline const char *
3782 deleg_perm_type(zfs_deleg_note_t note)
3783 {
3784 	/* subcommands */
3785 	switch (note) {
3786 		/* SUBCOMMANDS */
3787 		/* OTHER */
3788 	case ZFS_DELEG_NOTE_GROUPQUOTA:
3789 	case ZFS_DELEG_NOTE_GROUPUSED:
3790 	case ZFS_DELEG_NOTE_USERPROP:
3791 	case ZFS_DELEG_NOTE_USERQUOTA:
3792 	case ZFS_DELEG_NOTE_USERUSED:
3793 		/* other */
3794 		return (gettext("other"));
3795 	default:
3796 		return (gettext("subcommand"));
3797 	}
3798 }
3799 
3800 static int inline
3801 who_type2weight(zfs_deleg_who_type_t who_type)
3802 {
3803 	int res;
3804 	switch (who_type) {
3805 		case ZFS_DELEG_NAMED_SET_SETS:
3806 		case ZFS_DELEG_NAMED_SET:
3807 			res = 0;
3808 			break;
3809 		case ZFS_DELEG_CREATE_SETS:
3810 		case ZFS_DELEG_CREATE:
3811 			res = 1;
3812 			break;
3813 		case ZFS_DELEG_USER_SETS:
3814 		case ZFS_DELEG_USER:
3815 			res = 2;
3816 			break;
3817 		case ZFS_DELEG_GROUP_SETS:
3818 		case ZFS_DELEG_GROUP:
3819 			res = 3;
3820 			break;
3821 		case ZFS_DELEG_EVERYONE_SETS:
3822 		case ZFS_DELEG_EVERYONE:
3823 			res = 4;
3824 			break;
3825 		default:
3826 			res = -1;
3827 	}
3828 
3829 	return (res);
3830 }
3831 
3832 /* ARGSUSED */
3833 static int
3834 who_perm_compare(const void *larg, const void *rarg, void *unused)
3835 {
3836 	const who_perm_node_t *l = larg;
3837 	const who_perm_node_t *r = rarg;
3838 	zfs_deleg_who_type_t ltype = l->who_perm.who_type;
3839 	zfs_deleg_who_type_t rtype = r->who_perm.who_type;
3840 	int lweight = who_type2weight(ltype);
3841 	int rweight = who_type2weight(rtype);
3842 	int res = lweight - rweight;
3843 	if (res == 0)
3844 		res = strncmp(l->who_perm.who_name, r->who_perm.who_name,
3845 		    ZFS_MAX_DELEG_NAME-1);
3846 
3847 	if (res == 0)
3848 		return (0);
3849 	if (res > 0)
3850 		return (1);
3851 	else
3852 		return (-1);
3853 }
3854 
3855 /* ARGSUSED */
3856 static int
3857 deleg_perm_compare(const void *larg, const void *rarg, void *unused)
3858 {
3859 	const deleg_perm_node_t *l = larg;
3860 	const deleg_perm_node_t *r = rarg;
3861 	int res =  strncmp(l->dpn_perm.dp_name, r->dpn_perm.dp_name,
3862 	    ZFS_MAX_DELEG_NAME-1);
3863 
3864 	if (res == 0)
3865 		return (0);
3866 
3867 	if (res > 0)
3868 		return (1);
3869 	else
3870 		return (-1);
3871 }
3872 
3873 static inline void
3874 fs_perm_set_init(fs_perm_set_t *fspset)
3875 {
3876 	bzero(fspset, sizeof (fs_perm_set_t));
3877 
3878 	if ((fspset->fsps_list_pool = uu_list_pool_create("fsps_list_pool",
3879 	    sizeof (fs_perm_node_t), offsetof(fs_perm_node_t, fspn_list_node),
3880 	    NULL, UU_DEFAULT)) == NULL)
3881 		nomem();
3882 	if ((fspset->fsps_list = uu_list_create(fspset->fsps_list_pool, NULL,
3883 	    UU_DEFAULT)) == NULL)
3884 		nomem();
3885 
3886 	if ((fspset->fsps_named_set_avl_pool = uu_avl_pool_create(
3887 	    "named_set_avl_pool", sizeof (who_perm_node_t), offsetof(
3888 	    who_perm_node_t, who_avl_node), who_perm_compare,
3889 	    UU_DEFAULT)) == NULL)
3890 		nomem();
3891 
3892 	if ((fspset->fsps_who_perm_avl_pool = uu_avl_pool_create(
3893 	    "who_perm_avl_pool", sizeof (who_perm_node_t), offsetof(
3894 	    who_perm_node_t, who_avl_node), who_perm_compare,
3895 	    UU_DEFAULT)) == NULL)
3896 		nomem();
3897 
3898 	if ((fspset->fsps_deleg_perm_avl_pool = uu_avl_pool_create(
3899 	    "deleg_perm_avl_pool", sizeof (deleg_perm_node_t), offsetof(
3900 	    deleg_perm_node_t, dpn_avl_node), deleg_perm_compare, UU_DEFAULT))
3901 	    == NULL)
3902 		nomem();
3903 }
3904 
3905 static inline void fs_perm_fini(fs_perm_t *);
3906 static inline void who_perm_fini(who_perm_t *);
3907 
3908 static inline void
3909 fs_perm_set_fini(fs_perm_set_t *fspset)
3910 {
3911 	fs_perm_node_t *node = uu_list_first(fspset->fsps_list);
3912 
3913 	while (node != NULL) {
3914 		fs_perm_node_t *next_node =
3915 		    uu_list_next(fspset->fsps_list, node);
3916 		fs_perm_t *fsperm = &node->fspn_fsperm;
3917 		fs_perm_fini(fsperm);
3918 		uu_list_remove(fspset->fsps_list, node);
3919 		free(node);
3920 		node = next_node;
3921 	}
3922 
3923 	uu_avl_pool_destroy(fspset->fsps_named_set_avl_pool);
3924 	uu_avl_pool_destroy(fspset->fsps_who_perm_avl_pool);
3925 	uu_avl_pool_destroy(fspset->fsps_deleg_perm_avl_pool);
3926 }
3927 
3928 static inline void
3929 deleg_perm_init(deleg_perm_t *deleg_perm, zfs_deleg_who_type_t type,
3930     const char *name)
3931 {
3932 	deleg_perm->dp_who_type = type;
3933 	deleg_perm->dp_name = name;
3934 }
3935 
3936 static inline void
3937 who_perm_init(who_perm_t *who_perm, fs_perm_t *fsperm,
3938     zfs_deleg_who_type_t type, const char *name)
3939 {
3940 	uu_avl_pool_t	*pool;
3941 	pool = fsperm->fsp_set->fsps_deleg_perm_avl_pool;
3942 
3943 	bzero(who_perm, sizeof (who_perm_t));
3944 
3945 	if ((who_perm->who_deleg_perm_avl = uu_avl_create(pool, NULL,
3946 	    UU_DEFAULT)) == NULL)
3947 		nomem();
3948 
3949 	who_perm->who_type = type;
3950 	who_perm->who_name = name;
3951 	who_perm->who_fsperm = fsperm;
3952 }
3953 
3954 static inline void
3955 who_perm_fini(who_perm_t *who_perm)
3956 {
3957 	deleg_perm_node_t *node = uu_avl_first(who_perm->who_deleg_perm_avl);
3958 
3959 	while (node != NULL) {
3960 		deleg_perm_node_t *next_node =
3961 		    uu_avl_next(who_perm->who_deleg_perm_avl, node);
3962 
3963 		uu_avl_remove(who_perm->who_deleg_perm_avl, node);
3964 		free(node);
3965 		node = next_node;
3966 	}
3967 
3968 	uu_avl_destroy(who_perm->who_deleg_perm_avl);
3969 }
3970 
3971 static inline void
3972 fs_perm_init(fs_perm_t *fsperm, fs_perm_set_t *fspset, const char *fsname)
3973 {
3974 	uu_avl_pool_t	*nset_pool = fspset->fsps_named_set_avl_pool;
3975 	uu_avl_pool_t	*who_pool = fspset->fsps_who_perm_avl_pool;
3976 
3977 	bzero(fsperm, sizeof (fs_perm_t));
3978 
3979 	if ((fsperm->fsp_sc_avl = uu_avl_create(nset_pool, NULL, UU_DEFAULT))
3980 	    == NULL)
3981 		nomem();
3982 
3983 	if ((fsperm->fsp_uge_avl = uu_avl_create(who_pool, NULL, UU_DEFAULT))
3984 	    == NULL)
3985 		nomem();
3986 
3987 	fsperm->fsp_set = fspset;
3988 	fsperm->fsp_name = fsname;
3989 }
3990 
3991 static inline void
3992 fs_perm_fini(fs_perm_t *fsperm)
3993 {
3994 	who_perm_node_t *node = uu_avl_first(fsperm->fsp_sc_avl);
3995 	while (node != NULL) {
3996 		who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_sc_avl,
3997 		    node);
3998 		who_perm_t *who_perm = &node->who_perm;
3999 		who_perm_fini(who_perm);
4000 		uu_avl_remove(fsperm->fsp_sc_avl, node);
4001 		free(node);
4002 		node = next_node;
4003 	}
4004 
4005 	node = uu_avl_first(fsperm->fsp_uge_avl);
4006 	while (node != NULL) {
4007 		who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_uge_avl,
4008 		    node);
4009 		who_perm_t *who_perm = &node->who_perm;
4010 		who_perm_fini(who_perm);
4011 		uu_avl_remove(fsperm->fsp_uge_avl, node);
4012 		free(node);
4013 		node = next_node;
4014 	}
4015 
4016 	uu_avl_destroy(fsperm->fsp_sc_avl);
4017 	uu_avl_destroy(fsperm->fsp_uge_avl);
4018 }
4019 
4020 static void inline
4021 set_deleg_perm_node(uu_avl_t *avl, deleg_perm_node_t *node,
4022     zfs_deleg_who_type_t who_type, const char *name, char locality)
4023 {
4024 	uu_avl_index_t idx = 0;
4025 
4026 	deleg_perm_node_t *found_node = NULL;
4027 	deleg_perm_t	*deleg_perm = &node->dpn_perm;
4028 
4029 	deleg_perm_init(deleg_perm, who_type, name);
4030 
4031 	if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4032 	    == NULL)
4033 		uu_avl_insert(avl, node, idx);
4034 	else {
4035 		node = found_node;
4036 		deleg_perm = &node->dpn_perm;
4037 	}
4038 
4039 
4040 	switch (locality) {
4041 	case ZFS_DELEG_LOCAL:
4042 		deleg_perm->dp_local = B_TRUE;
4043 		break;
4044 	case ZFS_DELEG_DESCENDENT:
4045 		deleg_perm->dp_descend = B_TRUE;
4046 		break;
4047 	case ZFS_DELEG_NA:
4048 		break;
4049 	default:
4050 		assert(B_FALSE); /* invalid locality */
4051 	}
4052 }
4053 
4054 static inline int
4055 parse_who_perm(who_perm_t *who_perm, nvlist_t *nvl, char locality)
4056 {
4057 	nvpair_t *nvp = NULL;
4058 	fs_perm_set_t *fspset = who_perm->who_fsperm->fsp_set;
4059 	uu_avl_t *avl = who_perm->who_deleg_perm_avl;
4060 	zfs_deleg_who_type_t who_type = who_perm->who_type;
4061 
4062 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4063 		const char *name = nvpair_name(nvp);
4064 		data_type_t type = nvpair_type(nvp);
4065 		uu_avl_pool_t *avl_pool = fspset->fsps_deleg_perm_avl_pool;
4066 		deleg_perm_node_t *node =
4067 		    safe_malloc(sizeof (deleg_perm_node_t));
4068 
4069 		assert(type == DATA_TYPE_BOOLEAN);
4070 
4071 		uu_avl_node_init(node, &node->dpn_avl_node, avl_pool);
4072 		set_deleg_perm_node(avl, node, who_type, name, locality);
4073 	}
4074 
4075 	return (0);
4076 }
4077 
4078 static inline int
4079 parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl)
4080 {
4081 	nvpair_t *nvp = NULL;
4082 	fs_perm_set_t *fspset = fsperm->fsp_set;
4083 
4084 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4085 		nvlist_t *nvl2 = NULL;
4086 		const char *name = nvpair_name(nvp);
4087 		uu_avl_t *avl = NULL;
4088 		uu_avl_pool_t *avl_pool;
4089 		zfs_deleg_who_type_t perm_type = name[0];
4090 		char perm_locality = name[1];
4091 		const char *perm_name = name + 3;
4092 		boolean_t is_set = B_TRUE;
4093 		who_perm_t *who_perm = NULL;
4094 
4095 		assert('$' == name[2]);
4096 
4097 		if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4098 			return (-1);
4099 
4100 		switch (perm_type) {
4101 		case ZFS_DELEG_CREATE:
4102 		case ZFS_DELEG_CREATE_SETS:
4103 		case ZFS_DELEG_NAMED_SET:
4104 		case ZFS_DELEG_NAMED_SET_SETS:
4105 			avl_pool = fspset->fsps_named_set_avl_pool;
4106 			avl = fsperm->fsp_sc_avl;
4107 			break;
4108 		case ZFS_DELEG_USER:
4109 		case ZFS_DELEG_USER_SETS:
4110 		case ZFS_DELEG_GROUP:
4111 		case ZFS_DELEG_GROUP_SETS:
4112 		case ZFS_DELEG_EVERYONE:
4113 		case ZFS_DELEG_EVERYONE_SETS:
4114 			avl_pool = fspset->fsps_who_perm_avl_pool;
4115 			avl = fsperm->fsp_uge_avl;
4116 			break;
4117 		}
4118 
4119 		if (is_set) {
4120 			who_perm_node_t *found_node = NULL;
4121 			who_perm_node_t *node = safe_malloc(
4122 			    sizeof (who_perm_node_t));
4123 			who_perm = &node->who_perm;
4124 			uu_avl_index_t idx = 0;
4125 
4126 			uu_avl_node_init(node, &node->who_avl_node, avl_pool);
4127 			who_perm_init(who_perm, fsperm, perm_type, perm_name);
4128 
4129 			if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4130 			    == NULL) {
4131 				if (avl == fsperm->fsp_uge_avl) {
4132 					uid_t rid = 0;
4133 					struct passwd *p = NULL;
4134 					struct group *g = NULL;
4135 					const char *nice_name = NULL;
4136 
4137 					switch (perm_type) {
4138 					case ZFS_DELEG_USER_SETS:
4139 					case ZFS_DELEG_USER:
4140 						rid = atoi(perm_name);
4141 						p = getpwuid(rid);
4142 						if (p)
4143 							nice_name = p->pw_name;
4144 						break;
4145 					case ZFS_DELEG_GROUP_SETS:
4146 					case ZFS_DELEG_GROUP:
4147 						rid = atoi(perm_name);
4148 						g = getgrgid(rid);
4149 						if (g)
4150 							nice_name = g->gr_name;
4151 						break;
4152 					}
4153 
4154 					if (nice_name != NULL)
4155 						(void) strlcpy(
4156 						    node->who_perm.who_ug_name,
4157 						    nice_name, 256);
4158 				}
4159 
4160 				uu_avl_insert(avl, node, idx);
4161 			} else {
4162 				node = found_node;
4163 				who_perm = &node->who_perm;
4164 			}
4165 		}
4166 
4167 		(void) parse_who_perm(who_perm, nvl2, perm_locality);
4168 	}
4169 
4170 	return (0);
4171 }
4172 
4173 static inline int
4174 parse_fs_perm_set(fs_perm_set_t *fspset, nvlist_t *nvl)
4175 {
4176 	nvpair_t *nvp = NULL;
4177 	uu_avl_index_t idx = 0;
4178 
4179 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4180 		nvlist_t *nvl2 = NULL;
4181 		const char *fsname = nvpair_name(nvp);
4182 		data_type_t type = nvpair_type(nvp);
4183 		fs_perm_t *fsperm = NULL;
4184 		fs_perm_node_t *node = safe_malloc(sizeof (fs_perm_node_t));
4185 		if (node == NULL)
4186 			nomem();
4187 
4188 		fsperm = &node->fspn_fsperm;
4189 
4190 		assert(DATA_TYPE_NVLIST == type);
4191 
4192 		uu_list_node_init(node, &node->fspn_list_node,
4193 		    fspset->fsps_list_pool);
4194 
4195 		idx = uu_list_numnodes(fspset->fsps_list);
4196 		fs_perm_init(fsperm, fspset, fsname);
4197 
4198 		if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4199 			return (-1);
4200 
4201 		(void) parse_fs_perm(fsperm, nvl2);
4202 
4203 		uu_list_insert(fspset->fsps_list, node, idx);
4204 	}
4205 
4206 	return (0);
4207 }
4208 
4209 static inline const char *
4210 deleg_perm_comment(zfs_deleg_note_t note)
4211 {
4212 	const char *str = "";
4213 
4214 	/* subcommands */
4215 	switch (note) {
4216 		/* SUBCOMMANDS */
4217 	case ZFS_DELEG_NOTE_ALLOW:
4218 		str = gettext("Must also have the permission that is being"
4219 		    "\n\t\t\t\tallowed");
4220 		break;
4221 	case ZFS_DELEG_NOTE_CLONE:
4222 		str = gettext("Must also have the 'create' ability and 'mount'"
4223 		    "\n\t\t\t\tability in the origin file system");
4224 		break;
4225 	case ZFS_DELEG_NOTE_CREATE:
4226 		str = gettext("Must also have the 'mount' ability");
4227 		break;
4228 	case ZFS_DELEG_NOTE_DESTROY:
4229 		str = gettext("Must also have the 'mount' ability");
4230 		break;
4231 	case ZFS_DELEG_NOTE_DIFF:
4232 		str = gettext("Allows lookup of paths within a dataset;"
4233 		    "\n\t\t\t\tgiven an object number. Ordinary users need this"
4234 		    "\n\t\t\t\tin order to use zfs diff");
4235 		break;
4236 	case ZFS_DELEG_NOTE_HOLD:
4237 		str = gettext("Allows adding a user hold to a snapshot");
4238 		break;
4239 	case ZFS_DELEG_NOTE_MOUNT:
4240 		str = gettext("Allows mount/umount of ZFS datasets");
4241 		break;
4242 	case ZFS_DELEG_NOTE_PROMOTE:
4243 		str = gettext("Must also have the 'mount'\n\t\t\t\tand"
4244 		    " 'promote' ability in the origin file system");
4245 		break;
4246 	case ZFS_DELEG_NOTE_RECEIVE:
4247 		str = gettext("Must also have the 'mount' and 'create'"
4248 		    " ability");
4249 		break;
4250 	case ZFS_DELEG_NOTE_RELEASE:
4251 		str = gettext("Allows releasing a user hold which\n\t\t\t\t"
4252 		    "might destroy the snapshot");
4253 		break;
4254 	case ZFS_DELEG_NOTE_RENAME:
4255 		str = gettext("Must also have the 'mount' and 'create'"
4256 		    "\n\t\t\t\tability in the new parent");
4257 		break;
4258 	case ZFS_DELEG_NOTE_ROLLBACK:
4259 		str = gettext("");
4260 		break;
4261 	case ZFS_DELEG_NOTE_SEND:
4262 		str = gettext("");
4263 		break;
4264 	case ZFS_DELEG_NOTE_SHARE:
4265 		str = gettext("Allows sharing file systems over NFS or SMB"
4266 		    "\n\t\t\t\tprotocols");
4267 		break;
4268 	case ZFS_DELEG_NOTE_SNAPSHOT:
4269 		str = gettext("");
4270 		break;
4271 /*
4272  *	case ZFS_DELEG_NOTE_VSCAN:
4273  *		str = gettext("");
4274  *		break;
4275  */
4276 		/* OTHER */
4277 	case ZFS_DELEG_NOTE_GROUPQUOTA:
4278 		str = gettext("Allows accessing any groupquota@... property");
4279 		break;
4280 	case ZFS_DELEG_NOTE_GROUPUSED:
4281 		str = gettext("Allows reading any groupused@... property");
4282 		break;
4283 	case ZFS_DELEG_NOTE_USERPROP:
4284 		str = gettext("Allows changing any user property");
4285 		break;
4286 	case ZFS_DELEG_NOTE_USERQUOTA:
4287 		str = gettext("Allows accessing any userquota@... property");
4288 		break;
4289 	case ZFS_DELEG_NOTE_USERUSED:
4290 		str = gettext("Allows reading any userused@... property");
4291 		break;
4292 		/* other */
4293 	default:
4294 		str = "";
4295 	}
4296 
4297 	return (str);
4298 }
4299 
4300 struct allow_opts {
4301 	boolean_t local;
4302 	boolean_t descend;
4303 	boolean_t user;
4304 	boolean_t group;
4305 	boolean_t everyone;
4306 	boolean_t create;
4307 	boolean_t set;
4308 	boolean_t recursive; /* unallow only */
4309 	boolean_t prt_usage;
4310 
4311 	boolean_t prt_perms;
4312 	char *who;
4313 	char *perms;
4314 	const char *dataset;
4315 };
4316 
4317 static inline int
4318 prop_cmp(const void *a, const void *b)
4319 {
4320 	const char *str1 = *(const char **)a;
4321 	const char *str2 = *(const char **)b;
4322 	return (strcmp(str1, str2));
4323 }
4324 
4325 static void
4326 allow_usage(boolean_t un, boolean_t requested, const char *msg)
4327 {
4328 	const char *opt_desc[] = {
4329 		"-h", gettext("show this help message and exit"),
4330 		"-l", gettext("set permission locally"),
4331 		"-d", gettext("set permission for descents"),
4332 		"-u", gettext("set permission for user"),
4333 		"-g", gettext("set permission for group"),
4334 		"-e", gettext("set permission for everyone"),
4335 		"-c", gettext("set create time permission"),
4336 		"-s", gettext("define permission set"),
4337 		/* unallow only */
4338 		"-r", gettext("remove permissions recursively"),
4339 	};
4340 	size_t unallow_size = sizeof (opt_desc) / sizeof (char *);
4341 	size_t allow_size = unallow_size - 2;
4342 	const char *props[ZFS_NUM_PROPS];
4343 	int i;
4344 	size_t count = 0;
4345 	FILE *fp = requested ? stdout : stderr;
4346 	zprop_desc_t *pdtbl = zfs_prop_get_table();
4347 	const char *fmt = gettext("%-16s %-14s\t%s\n");
4348 
4349 	(void) fprintf(fp, gettext("Usage: %s\n"), get_usage(un ? HELP_UNALLOW :
4350 	    HELP_ALLOW));
4351 	(void) fprintf(fp, gettext("Options:\n"));
4352 	for (int i = 0; i < (un ? unallow_size : allow_size); i++) {
4353 		const char *opt = opt_desc[i++];
4354 		const char *optdsc = opt_desc[i];
4355 		(void) fprintf(fp, gettext("  %-10s  %s\n"), opt, optdsc);
4356 	}
4357 
4358 	(void) fprintf(fp, gettext("\nThe following permissions are "
4359 	    "supported:\n\n"));
4360 	(void) fprintf(fp, fmt, gettext("NAME"), gettext("TYPE"),
4361 	    gettext("NOTES"));
4362 	for (i = 0; i < ZFS_NUM_DELEG_NOTES; i++) {
4363 		const char *perm_name = zfs_deleg_perm_tbl[i].z_perm;
4364 		zfs_deleg_note_t perm_note = zfs_deleg_perm_tbl[i].z_note;
4365 		const char *perm_type = deleg_perm_type(perm_note);
4366 		const char *perm_comment = deleg_perm_comment(perm_note);
4367 		(void) fprintf(fp, fmt, perm_name, perm_type, perm_comment);
4368 	}
4369 
4370 	for (i = 0; i < ZFS_NUM_PROPS; i++) {
4371 		zprop_desc_t *pd = &pdtbl[i];
4372 		if (pd->pd_visible != B_TRUE)
4373 			continue;
4374 
4375 		if (pd->pd_attr == PROP_READONLY)
4376 			continue;
4377 
4378 		props[count++] = pd->pd_name;
4379 	}
4380 	props[count] = NULL;
4381 
4382 	qsort(props, count, sizeof (char *), prop_cmp);
4383 
4384 	for (i = 0; i < count; i++)
4385 		(void) fprintf(fp, fmt, props[i], gettext("property"), "");
4386 
4387 	if (msg != NULL)
4388 		(void) fprintf(fp, gettext("\nzfs: error: %s"), msg);
4389 
4390 	exit(requested ? 0 : 2);
4391 }
4392 
4393 static inline const char *
4394 munge_args(int argc, char **argv, boolean_t un, size_t expected_argc,
4395     char **permsp)
4396 {
4397 	if (un && argc == expected_argc - 1)
4398 		*permsp = NULL;
4399 	else if (argc == expected_argc)
4400 		*permsp = argv[argc - 2];
4401 	else
4402 		allow_usage(un, B_FALSE,
4403 		    gettext("wrong number of parameters\n"));
4404 
4405 	return (argv[argc - 1]);
4406 }
4407 
4408 static void
4409 parse_allow_args(int argc, char **argv, boolean_t un, struct allow_opts *opts)
4410 {
4411 	int uge_sum = opts->user + opts->group + opts->everyone;
4412 	int csuge_sum = opts->create + opts->set + uge_sum;
4413 	int ldcsuge_sum = csuge_sum + opts->local + opts->descend;
4414 	int all_sum = un ? ldcsuge_sum + opts->recursive : ldcsuge_sum;
4415 
4416 	if (uge_sum > 1)
4417 		allow_usage(un, B_FALSE,
4418 		    gettext("-u, -g, and -e are mutually exclusive\n"));
4419 
4420 	if (opts->prt_usage)
4421 		if (argc == 0 && all_sum == 0)
4422 			allow_usage(un, B_TRUE, NULL);
4423 		else
4424 			usage(B_FALSE);
4425 
4426 	if (opts->set) {
4427 		if (csuge_sum > 1)
4428 			allow_usage(un, B_FALSE,
4429 			    gettext("invalid options combined with -s\n"));
4430 
4431 		opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4432 		if (argv[0][0] != '@')
4433 			allow_usage(un, B_FALSE,
4434 			    gettext("invalid set name: missing '@' prefix\n"));
4435 		opts->who = argv[0];
4436 	} else if (opts->create) {
4437 		if (ldcsuge_sum > 1)
4438 			allow_usage(un, B_FALSE,
4439 			    gettext("invalid options combined with -c\n"));
4440 		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4441 	} else if (opts->everyone) {
4442 		if (csuge_sum > 1)
4443 			allow_usage(un, B_FALSE,
4444 			    gettext("invalid options combined with -e\n"));
4445 		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4446 	} else if (uge_sum == 0 && argc > 0 && strcmp(argv[0], "everyone")
4447 	    == 0) {
4448 		opts->everyone = B_TRUE;
4449 		argc--;
4450 		argv++;
4451 		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4452 	} else if (argc == 1 && !un) {
4453 		opts->prt_perms = B_TRUE;
4454 		opts->dataset = argv[argc-1];
4455 	} else {
4456 		opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4457 		opts->who = argv[0];
4458 	}
4459 
4460 	if (!opts->local && !opts->descend) {
4461 		opts->local = B_TRUE;
4462 		opts->descend = B_TRUE;
4463 	}
4464 }
4465 
4466 static void
4467 store_allow_perm(zfs_deleg_who_type_t type, boolean_t local, boolean_t descend,
4468     const char *who, char *perms, nvlist_t *top_nvl)
4469 {
4470 	int i;
4471 	char ld[2] = { '\0', '\0' };
4472 	char who_buf[ZFS_MAXNAMELEN+32];
4473 	char base_type;
4474 	char set_type;
4475 	nvlist_t *base_nvl = NULL;
4476 	nvlist_t *set_nvl = NULL;
4477 	nvlist_t *nvl;
4478 
4479 	if (nvlist_alloc(&base_nvl, NV_UNIQUE_NAME, 0) != 0)
4480 		nomem();
4481 	if (nvlist_alloc(&set_nvl, NV_UNIQUE_NAME, 0) !=  0)
4482 		nomem();
4483 
4484 	switch (type) {
4485 	case ZFS_DELEG_NAMED_SET_SETS:
4486 	case ZFS_DELEG_NAMED_SET:
4487 		set_type = ZFS_DELEG_NAMED_SET_SETS;
4488 		base_type = ZFS_DELEG_NAMED_SET;
4489 		ld[0] = ZFS_DELEG_NA;
4490 		break;
4491 	case ZFS_DELEG_CREATE_SETS:
4492 	case ZFS_DELEG_CREATE:
4493 		set_type = ZFS_DELEG_CREATE_SETS;
4494 		base_type = ZFS_DELEG_CREATE;
4495 		ld[0] = ZFS_DELEG_NA;
4496 		break;
4497 	case ZFS_DELEG_USER_SETS:
4498 	case ZFS_DELEG_USER:
4499 		set_type = ZFS_DELEG_USER_SETS;
4500 		base_type = ZFS_DELEG_USER;
4501 		if (local)
4502 			ld[0] = ZFS_DELEG_LOCAL;
4503 		if (descend)
4504 			ld[1] = ZFS_DELEG_DESCENDENT;
4505 		break;
4506 	case ZFS_DELEG_GROUP_SETS:
4507 	case ZFS_DELEG_GROUP:
4508 		set_type = ZFS_DELEG_GROUP_SETS;
4509 		base_type = ZFS_DELEG_GROUP;
4510 		if (local)
4511 			ld[0] = ZFS_DELEG_LOCAL;
4512 		if (descend)
4513 			ld[1] = ZFS_DELEG_DESCENDENT;
4514 		break;
4515 	case ZFS_DELEG_EVERYONE_SETS:
4516 	case ZFS_DELEG_EVERYONE:
4517 		set_type = ZFS_DELEG_EVERYONE_SETS;
4518 		base_type = ZFS_DELEG_EVERYONE;
4519 		if (local)
4520 			ld[0] = ZFS_DELEG_LOCAL;
4521 		if (descend)
4522 			ld[1] = ZFS_DELEG_DESCENDENT;
4523 	}
4524 
4525 	if (perms != NULL) {
4526 		char *curr = perms;
4527 		char *end = curr + strlen(perms);
4528 
4529 		while (curr < end) {
4530 			char *delim = strchr(curr, ',');
4531 			if (delim == NULL)
4532 				delim = end;
4533 			else
4534 				*delim = '\0';
4535 
4536 			if (curr[0] == '@')
4537 				nvl = set_nvl;
4538 			else
4539 				nvl = base_nvl;
4540 
4541 			(void) nvlist_add_boolean(nvl, curr);
4542 			if (delim != end)
4543 				*delim = ',';
4544 			curr = delim + 1;
4545 		}
4546 
4547 		for (i = 0; i < 2; i++) {
4548 			char locality = ld[i];
4549 			if (locality == 0)
4550 				continue;
4551 
4552 			if (!nvlist_empty(base_nvl)) {
4553 				if (who != NULL)
4554 					(void) snprintf(who_buf,
4555 					    sizeof (who_buf), "%c%c$%s",
4556 					    base_type, locality, who);
4557 				else
4558 					(void) snprintf(who_buf,
4559 					    sizeof (who_buf), "%c%c$",
4560 					    base_type, locality);
4561 
4562 				(void) nvlist_add_nvlist(top_nvl, who_buf,
4563 				    base_nvl);
4564 			}
4565 
4566 
4567 			if (!nvlist_empty(set_nvl)) {
4568 				if (who != NULL)
4569 					(void) snprintf(who_buf,
4570 					    sizeof (who_buf), "%c%c$%s",
4571 					    set_type, locality, who);
4572 				else
4573 					(void) snprintf(who_buf,
4574 					    sizeof (who_buf), "%c%c$",
4575 					    set_type, locality);
4576 
4577 				(void) nvlist_add_nvlist(top_nvl, who_buf,
4578 				    set_nvl);
4579 			}
4580 		}
4581 	} else {
4582 		for (i = 0; i < 2; i++) {
4583 			char locality = ld[i];
4584 			if (locality == 0)
4585 				continue;
4586 
4587 			if (who != NULL)
4588 				(void) snprintf(who_buf, sizeof (who_buf),
4589 				    "%c%c$%s", base_type, locality, who);
4590 			else
4591 				(void) snprintf(who_buf, sizeof (who_buf),
4592 				    "%c%c$", base_type, locality);
4593 			(void) nvlist_add_boolean(top_nvl, who_buf);
4594 
4595 			if (who != NULL)
4596 				(void) snprintf(who_buf, sizeof (who_buf),
4597 				    "%c%c$%s", set_type, locality, who);
4598 			else
4599 				(void) snprintf(who_buf, sizeof (who_buf),
4600 				    "%c%c$", set_type, locality);
4601 			(void) nvlist_add_boolean(top_nvl, who_buf);
4602 		}
4603 	}
4604 }
4605 
4606 static int
4607 construct_fsacl_list(boolean_t un, struct allow_opts *opts, nvlist_t **nvlp)
4608 {
4609 	if (nvlist_alloc(nvlp, NV_UNIQUE_NAME, 0) != 0)
4610 		nomem();
4611 
4612 	if (opts->set) {
4613 		store_allow_perm(ZFS_DELEG_NAMED_SET, opts->local,
4614 		    opts->descend, opts->who, opts->perms, *nvlp);
4615 	} else if (opts->create) {
4616 		store_allow_perm(ZFS_DELEG_CREATE, opts->local,
4617 		    opts->descend, NULL, opts->perms, *nvlp);
4618 	} else if (opts->everyone) {
4619 		store_allow_perm(ZFS_DELEG_EVERYONE, opts->local,
4620 		    opts->descend, NULL, opts->perms, *nvlp);
4621 	} else {
4622 		char *curr = opts->who;
4623 		char *end = curr + strlen(curr);
4624 
4625 		while (curr < end) {
4626 			const char *who;
4627 			zfs_deleg_who_type_t who_type;
4628 			char *endch;
4629 			char *delim = strchr(curr, ',');
4630 			char errbuf[256];
4631 			char id[64];
4632 			struct passwd *p = NULL;
4633 			struct group *g = NULL;
4634 
4635 			uid_t rid;
4636 			if (delim == NULL)
4637 				delim = end;
4638 			else
4639 				*delim = '\0';
4640 
4641 			rid = (uid_t)strtol(curr, &endch, 0);
4642 			if (opts->user) {
4643 				who_type = ZFS_DELEG_USER;
4644 				if (*endch != '\0')
4645 					p = getpwnam(curr);
4646 				else
4647 					p = getpwuid(rid);
4648 
4649 				if (p != NULL)
4650 					rid = p->pw_uid;
4651 				else {
4652 					(void) snprintf(errbuf, 256, gettext(
4653 					    "invalid user %s"), curr);
4654 					allow_usage(un, B_TRUE, errbuf);
4655 				}
4656 			} else if (opts->group) {
4657 				who_type = ZFS_DELEG_GROUP;
4658 				if (*endch != '\0')
4659 					g = getgrnam(curr);
4660 				else
4661 					g = getgrgid(rid);
4662 
4663 				if (g != NULL)
4664 					rid = g->gr_gid;
4665 				else {
4666 					(void) snprintf(errbuf, 256, gettext(
4667 					    "invalid group %s"),  curr);
4668 					allow_usage(un, B_TRUE, errbuf);
4669 				}
4670 			} else {
4671 				if (*endch != '\0') {
4672 					p = getpwnam(curr);
4673 				} else {
4674 					p = getpwuid(rid);
4675 				}
4676 
4677 				if (p == NULL)
4678 					if (*endch != '\0') {
4679 						g = getgrnam(curr);
4680 					} else {
4681 						g = getgrgid(rid);
4682 					}
4683 
4684 				if (p != NULL) {
4685 					who_type = ZFS_DELEG_USER;
4686 					rid = p->pw_uid;
4687 				} else if (g != NULL) {
4688 					who_type = ZFS_DELEG_GROUP;
4689 					rid = g->gr_gid;
4690 				} else {
4691 					(void) snprintf(errbuf, 256, gettext(
4692 					    "invalid user/group %s"), curr);
4693 					allow_usage(un, B_TRUE, errbuf);
4694 				}
4695 			}
4696 
4697 			(void) sprintf(id, "%u", rid);
4698 			who = id;
4699 
4700 			store_allow_perm(who_type, opts->local,
4701 			    opts->descend, who, opts->perms, *nvlp);
4702 			curr = delim + 1;
4703 		}
4704 	}
4705 
4706 	return (0);
4707 }
4708 
4709 static void
4710 print_set_creat_perms(uu_avl_t *who_avl)
4711 {
4712 	const char *sc_title[] = {
4713 		gettext("Permission sets:\n"),
4714 		gettext("Create time permissions:\n"),
4715 		NULL
4716 	};
4717 	const char **title_ptr = sc_title;
4718 	who_perm_node_t *who_node = NULL;
4719 	int prev_weight = -1;
4720 
4721 	for (who_node = uu_avl_first(who_avl); who_node != NULL;
4722 	    who_node = uu_avl_next(who_avl, who_node)) {
4723 		uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4724 		zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4725 		const char *who_name = who_node->who_perm.who_name;
4726 		int weight = who_type2weight(who_type);
4727 		boolean_t first = B_TRUE;
4728 		deleg_perm_node_t *deleg_node;
4729 
4730 		if (prev_weight != weight) {
4731 			(void) printf(*title_ptr++);
4732 			prev_weight = weight;
4733 		}
4734 
4735 		if (who_name == NULL || strnlen(who_name, 1) == 0)
4736 			(void) printf("\t");
4737 		else
4738 			(void) printf("\t%s ", who_name);
4739 
4740 		for (deleg_node = uu_avl_first(avl); deleg_node != NULL;
4741 		    deleg_node = uu_avl_next(avl, deleg_node)) {
4742 			if (first) {
4743 				(void) printf("%s",
4744 				    deleg_node->dpn_perm.dp_name);
4745 				first = B_FALSE;
4746 			} else
4747 				(void) printf(",%s",
4748 				    deleg_node->dpn_perm.dp_name);
4749 		}
4750 
4751 		(void) printf("\n");
4752 	}
4753 }
4754 
4755 static void inline
4756 print_uge_deleg_perms(uu_avl_t *who_avl, boolean_t local, boolean_t descend,
4757     const char *title)
4758 {
4759 	who_perm_node_t *who_node = NULL;
4760 	boolean_t prt_title = B_TRUE;
4761 	uu_avl_walk_t *walk;
4762 
4763 	if ((walk = uu_avl_walk_start(who_avl, UU_WALK_ROBUST)) == NULL)
4764 		nomem();
4765 
4766 	while ((who_node = uu_avl_walk_next(walk)) != NULL) {
4767 		const char *who_name = who_node->who_perm.who_name;
4768 		const char *nice_who_name = who_node->who_perm.who_ug_name;
4769 		uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4770 		zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4771 		char delim = ' ';
4772 		deleg_perm_node_t *deleg_node;
4773 		boolean_t prt_who = B_TRUE;
4774 
4775 		for (deleg_node = uu_avl_first(avl);
4776 		    deleg_node != NULL;
4777 		    deleg_node = uu_avl_next(avl, deleg_node)) {
4778 			if (local != deleg_node->dpn_perm.dp_local ||
4779 			    descend != deleg_node->dpn_perm.dp_descend)
4780 				continue;
4781 
4782 			if (prt_who) {
4783 				const char *who = NULL;
4784 				if (prt_title) {
4785 					prt_title = B_FALSE;
4786 					(void) printf(title);
4787 				}
4788 
4789 				switch (who_type) {
4790 				case ZFS_DELEG_USER_SETS:
4791 				case ZFS_DELEG_USER:
4792 					who = gettext("user");
4793 					if (nice_who_name)
4794 						who_name  = nice_who_name;
4795 					break;
4796 				case ZFS_DELEG_GROUP_SETS:
4797 				case ZFS_DELEG_GROUP:
4798 					who = gettext("group");
4799 					if (nice_who_name)
4800 						who_name  = nice_who_name;
4801 					break;
4802 				case ZFS_DELEG_EVERYONE_SETS:
4803 				case ZFS_DELEG_EVERYONE:
4804 					who = gettext("everyone");
4805 					who_name = NULL;
4806 				}
4807 
4808 				prt_who = B_FALSE;
4809 				if (who_name == NULL)
4810 					(void) printf("\t%s", who);
4811 				else
4812 					(void) printf("\t%s %s", who, who_name);
4813 			}
4814 
4815 			(void) printf("%c%s", delim,
4816 			    deleg_node->dpn_perm.dp_name);
4817 			delim = ',';
4818 		}
4819 
4820 		if (!prt_who)
4821 			(void) printf("\n");
4822 	}
4823 
4824 	uu_avl_walk_end(walk);
4825 }
4826 
4827 static void
4828 print_fs_perms(fs_perm_set_t *fspset)
4829 {
4830 	fs_perm_node_t *node = NULL;
4831 	char buf[ZFS_MAXNAMELEN+32];
4832 	const char *dsname = buf;
4833 
4834 	for (node = uu_list_first(fspset->fsps_list); node != NULL;
4835 	    node = uu_list_next(fspset->fsps_list, node)) {
4836 		uu_avl_t *sc_avl = node->fspn_fsperm.fsp_sc_avl;
4837 		uu_avl_t *uge_avl = node->fspn_fsperm.fsp_uge_avl;
4838 		int left = 0;
4839 
4840 		(void) snprintf(buf, ZFS_MAXNAMELEN+32,
4841 		    gettext("---- Permissions on %s "),
4842 		    node->fspn_fsperm.fsp_name);
4843 		(void) printf(dsname);
4844 		left = 70 - strlen(buf);
4845 		while (left-- > 0)
4846 			(void) printf("-");
4847 		(void) printf("\n");
4848 
4849 		print_set_creat_perms(sc_avl);
4850 		print_uge_deleg_perms(uge_avl, B_TRUE, B_FALSE,
4851 		    gettext("Local permissions:\n"));
4852 		print_uge_deleg_perms(uge_avl, B_FALSE, B_TRUE,
4853 		    gettext("Descendent permissions:\n"));
4854 		print_uge_deleg_perms(uge_avl, B_TRUE, B_TRUE,
4855 		    gettext("Local+Descendent permissions:\n"));
4856 	}
4857 }
4858 
4859 static fs_perm_set_t fs_perm_set = { NULL, NULL, NULL, NULL };
4860 
4861 struct deleg_perms {
4862 	boolean_t un;
4863 	nvlist_t *nvl;
4864 };
4865 
4866 static int
4867 set_deleg_perms(zfs_handle_t *zhp, void *data)
4868 {
4869 	struct deleg_perms *perms = (struct deleg_perms *)data;
4870 	zfs_type_t zfs_type = zfs_get_type(zhp);
4871 
4872 	if (zfs_type != ZFS_TYPE_FILESYSTEM && zfs_type != ZFS_TYPE_VOLUME)
4873 		return (0);
4874 
4875 	return (zfs_set_fsacl(zhp, perms->un, perms->nvl));
4876 }
4877 
4878 static int
4879 zfs_do_allow_unallow_impl(int argc, char **argv, boolean_t un)
4880 {
4881 	zfs_handle_t *zhp;
4882 	nvlist_t *perm_nvl = NULL;
4883 	nvlist_t *update_perm_nvl = NULL;
4884 	int error = 1;
4885 	int c;
4886 	struct allow_opts opts = { 0 };
4887 
4888 	const char *optstr = un ? "ldugecsrh" : "ldugecsh";
4889 
4890 	/* check opts */
4891 	while ((c = getopt(argc, argv, optstr)) != -1) {
4892 		switch (c) {
4893 		case 'l':
4894 			opts.local = B_TRUE;
4895 			break;
4896 		case 'd':
4897 			opts.descend = B_TRUE;
4898 			break;
4899 		case 'u':
4900 			opts.user = B_TRUE;
4901 			break;
4902 		case 'g':
4903 			opts.group = B_TRUE;
4904 			break;
4905 		case 'e':
4906 			opts.everyone = B_TRUE;
4907 			break;
4908 		case 's':
4909 			opts.set = B_TRUE;
4910 			break;
4911 		case 'c':
4912 			opts.create = B_TRUE;
4913 			break;
4914 		case 'r':
4915 			opts.recursive = B_TRUE;
4916 			break;
4917 		case ':':
4918 			(void) fprintf(stderr, gettext("missing argument for "
4919 			    "'%c' option\n"), optopt);
4920 			usage(B_FALSE);
4921 			break;
4922 		case 'h':
4923 			opts.prt_usage = B_TRUE;
4924 			break;
4925 		case '?':
4926 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
4927 			    optopt);
4928 			usage(B_FALSE);
4929 		}
4930 	}
4931 
4932 	argc -= optind;
4933 	argv += optind;
4934 
4935 	/* check arguments */
4936 	parse_allow_args(argc, argv, un, &opts);
4937 
4938 	/* try to open the dataset */
4939 	if ((zhp = zfs_open(g_zfs, opts.dataset, ZFS_TYPE_FILESYSTEM |
4940 	    ZFS_TYPE_VOLUME)) == NULL) {
4941 		(void) fprintf(stderr, "Failed to open dataset: %s\n",
4942 		    opts.dataset);
4943 		return (-1);
4944 	}
4945 
4946 	if (zfs_get_fsacl(zhp, &perm_nvl) != 0)
4947 		goto cleanup2;
4948 
4949 	fs_perm_set_init(&fs_perm_set);
4950 	if (parse_fs_perm_set(&fs_perm_set, perm_nvl) != 0) {
4951 		(void) fprintf(stderr, "Failed to parse fsacl permissions\n");
4952 		goto cleanup1;
4953 	}
4954 
4955 	if (opts.prt_perms)
4956 		print_fs_perms(&fs_perm_set);
4957 	else {
4958 		(void) construct_fsacl_list(un, &opts, &update_perm_nvl);
4959 		if (zfs_set_fsacl(zhp, un, update_perm_nvl) != 0)
4960 			goto cleanup0;
4961 
4962 		if (un && opts.recursive) {
4963 			struct deleg_perms data = { un, update_perm_nvl };
4964 			if (zfs_iter_filesystems(zhp, set_deleg_perms,
4965 			    &data) != 0)
4966 				goto cleanup0;
4967 		}
4968 	}
4969 
4970 	error = 0;
4971 
4972 cleanup0:
4973 	nvlist_free(perm_nvl);
4974 	if (update_perm_nvl != NULL)
4975 		nvlist_free(update_perm_nvl);
4976 cleanup1:
4977 	fs_perm_set_fini(&fs_perm_set);
4978 cleanup2:
4979 	zfs_close(zhp);
4980 
4981 	return (error);
4982 }
4983 
4984 /*
4985  * zfs allow [-r] [-t] <tag> <snap> ...
4986  *
4987  *	-r	Recursively hold
4988  *	-t	Temporary hold (hidden option)
4989  *
4990  * Apply a user-hold with the given tag to the list of snapshots.
4991  */
4992 static int
4993 zfs_do_allow(int argc, char **argv)
4994 {
4995 	return (zfs_do_allow_unallow_impl(argc, argv, B_FALSE));
4996 }
4997 
4998 /*
4999  * zfs unallow [-r] [-t] <tag> <snap> ...
5000  *
5001  *	-r	Recursively hold
5002  *	-t	Temporary hold (hidden option)
5003  *
5004  * Apply a user-hold with the given tag to the list of snapshots.
5005  */
5006 static int
5007 zfs_do_unallow(int argc, char **argv)
5008 {
5009 	return (zfs_do_allow_unallow_impl(argc, argv, B_TRUE));
5010 }
5011 
5012 static int
5013 zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
5014 {
5015 	int errors = 0;
5016 	int i;
5017 	const char *tag;
5018 	boolean_t recursive = B_FALSE;
5019 	boolean_t temphold = B_FALSE;
5020 	const char *opts = holding ? "rt" : "r";
5021 	int c;
5022 
5023 	/* check options */
5024 	while ((c = getopt(argc, argv, opts)) != -1) {
5025 		switch (c) {
5026 		case 'r':
5027 			recursive = B_TRUE;
5028 			break;
5029 		case 't':
5030 			temphold = B_TRUE;
5031 			break;
5032 		case '?':
5033 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5034 			    optopt);
5035 			usage(B_FALSE);
5036 		}
5037 	}
5038 
5039 	argc -= optind;
5040 	argv += optind;
5041 
5042 	/* check number of arguments */
5043 	if (argc < 2)
5044 		usage(B_FALSE);
5045 
5046 	tag = argv[0];
5047 	--argc;
5048 	++argv;
5049 
5050 	if (holding && tag[0] == '.') {
5051 		/* tags starting with '.' are reserved for libzfs */
5052 		(void) fprintf(stderr, gettext("tag may not start with '.'\n"));
5053 		usage(B_FALSE);
5054 	}
5055 
5056 	for (i = 0; i < argc; ++i) {
5057 		zfs_handle_t *zhp;
5058 		char parent[ZFS_MAXNAMELEN];
5059 		const char *delim;
5060 		char *path = argv[i];
5061 
5062 		delim = strchr(path, '@');
5063 		if (delim == NULL) {
5064 			(void) fprintf(stderr,
5065 			    gettext("'%s' is not a snapshot\n"), path);
5066 			++errors;
5067 			continue;
5068 		}
5069 		(void) strncpy(parent, path, delim - path);
5070 		parent[delim - path] = '\0';
5071 
5072 		zhp = zfs_open(g_zfs, parent,
5073 		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
5074 		if (zhp == NULL) {
5075 			++errors;
5076 			continue;
5077 		}
5078 		if (holding) {
5079 			if (zfs_hold(zhp, delim+1, tag, recursive,
5080 			    temphold, B_FALSE, -1, 0, 0) != 0)
5081 				++errors;
5082 		} else {
5083 			if (zfs_release(zhp, delim+1, tag, recursive) != 0)
5084 				++errors;
5085 		}
5086 		zfs_close(zhp);
5087 	}
5088 
5089 	return (errors != 0);
5090 }
5091 
5092 /*
5093  * zfs hold [-r] [-t] <tag> <snap> ...
5094  *
5095  *	-r	Recursively hold
5096  *	-t	Temporary hold (hidden option)
5097  *
5098  * Apply a user-hold with the given tag to the list of snapshots.
5099  */
5100 static int
5101 zfs_do_hold(int argc, char **argv)
5102 {
5103 	return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
5104 }
5105 
5106 /*
5107  * zfs release [-r] <tag> <snap> ...
5108  *
5109  *	-r	Recursively release
5110  *
5111  * Release a user-hold with the given tag from the list of snapshots.
5112  */
5113 static int
5114 zfs_do_release(int argc, char **argv)
5115 {
5116 	return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
5117 }
5118 
5119 typedef struct holds_cbdata {
5120 	boolean_t	cb_recursive;
5121 	const char	*cb_snapname;
5122 	nvlist_t	**cb_nvlp;
5123 	size_t		cb_max_namelen;
5124 	size_t		cb_max_taglen;
5125 } holds_cbdata_t;
5126 
5127 #define	STRFTIME_FMT_STR "%a %b %e %k:%M %Y"
5128 #define	DATETIME_BUF_LEN (32)
5129 /*
5130  *
5131  */
5132 static void
5133 print_holds(boolean_t scripted, size_t nwidth, size_t tagwidth, nvlist_t *nvl)
5134 {
5135 	int i;
5136 	nvpair_t *nvp = NULL;
5137 	char *hdr_cols[] = { "NAME", "TAG", "TIMESTAMP" };
5138 	const char *col;
5139 
5140 	if (!scripted) {
5141 		for (i = 0; i < 3; i++) {
5142 			col = gettext(hdr_cols[i]);
5143 			if (i < 2)
5144 				(void) printf("%-*s  ", i ? tagwidth : nwidth,
5145 				    col);
5146 			else
5147 				(void) printf("%s\n", col);
5148 		}
5149 	}
5150 
5151 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5152 		char *zname = nvpair_name(nvp);
5153 		nvlist_t *nvl2;
5154 		nvpair_t *nvp2 = NULL;
5155 		(void) nvpair_value_nvlist(nvp, &nvl2);
5156 		while ((nvp2 = nvlist_next_nvpair(nvl2, nvp2)) != NULL) {
5157 			char tsbuf[DATETIME_BUF_LEN];
5158 			char *tagname = nvpair_name(nvp2);
5159 			uint64_t val = 0;
5160 			time_t time;
5161 			struct tm t;
5162 			char sep = scripted ? '\t' : ' ';
5163 			size_t sepnum = scripted ? 1 : 2;
5164 
5165 			(void) nvpair_value_uint64(nvp2, &val);
5166 			time = (time_t)val;
5167 			(void) localtime_r(&time, &t);
5168 			(void) strftime(tsbuf, DATETIME_BUF_LEN,
5169 			    gettext(STRFTIME_FMT_STR), &t);
5170 
5171 			(void) printf("%-*s%*c%-*s%*c%s\n", nwidth, zname,
5172 			    sepnum, sep, tagwidth, tagname, sepnum, sep, tsbuf);
5173 		}
5174 	}
5175 }
5176 
5177 /*
5178  * Generic callback function to list a dataset or snapshot.
5179  */
5180 static int
5181 holds_callback(zfs_handle_t *zhp, void *data)
5182 {
5183 	holds_cbdata_t *cbp = data;
5184 	nvlist_t *top_nvl = *cbp->cb_nvlp;
5185 	nvlist_t *nvl = NULL;
5186 	nvpair_t *nvp = NULL;
5187 	const char *zname = zfs_get_name(zhp);
5188 	size_t znamelen = strnlen(zname, ZFS_MAXNAMELEN);
5189 
5190 	if (cbp->cb_recursive) {
5191 		const char *snapname;
5192 		char *delim  = strchr(zname, '@');
5193 		if (delim == NULL)
5194 			return (0);
5195 
5196 		snapname = delim + 1;
5197 		if (strcmp(cbp->cb_snapname, snapname))
5198 			return (0);
5199 	}
5200 
5201 	if (zfs_get_holds(zhp, &nvl) != 0)
5202 		return (-1);
5203 
5204 	if (znamelen > cbp->cb_max_namelen)
5205 		cbp->cb_max_namelen  = znamelen;
5206 
5207 	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5208 		const char *tag = nvpair_name(nvp);
5209 		size_t taglen = strnlen(tag, MAXNAMELEN);
5210 		if (taglen > cbp->cb_max_taglen)
5211 			cbp->cb_max_taglen  = taglen;
5212 	}
5213 
5214 	return (nvlist_add_nvlist(top_nvl, zname, nvl));
5215 }
5216 
5217 /*
5218  * zfs holds [-r] <snap> ...
5219  *
5220  *	-r	Recursively hold
5221  */
5222 static int
5223 zfs_do_holds(int argc, char **argv)
5224 {
5225 	int errors = 0;
5226 	int c;
5227 	int i;
5228 	boolean_t scripted = B_FALSE;
5229 	boolean_t recursive = B_FALSE;
5230 	const char *opts = "rH";
5231 	nvlist_t *nvl;
5232 
5233 	int types = ZFS_TYPE_SNAPSHOT;
5234 	holds_cbdata_t cb = { 0 };
5235 
5236 	int limit = 0;
5237 	int ret = 0;
5238 	int flags = 0;
5239 
5240 	/* check options */
5241 	while ((c = getopt(argc, argv, opts)) != -1) {
5242 		switch (c) {
5243 		case 'r':
5244 			recursive = B_TRUE;
5245 			break;
5246 		case 'H':
5247 			scripted = B_TRUE;
5248 			break;
5249 		case '?':
5250 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5251 			    optopt);
5252 			usage(B_FALSE);
5253 		}
5254 	}
5255 
5256 	if (recursive) {
5257 		types |= ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
5258 		flags |= ZFS_ITER_RECURSE;
5259 	}
5260 
5261 	argc -= optind;
5262 	argv += optind;
5263 
5264 	/* check number of arguments */
5265 	if (argc < 1)
5266 		usage(B_FALSE);
5267 
5268 	if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
5269 		nomem();
5270 
5271 	for (i = 0; i < argc; ++i) {
5272 		char *snapshot = argv[i];
5273 		const char *delim;
5274 		const char *snapname;
5275 
5276 		delim = strchr(snapshot, '@');
5277 		if (delim == NULL) {
5278 			(void) fprintf(stderr,
5279 			    gettext("'%s' is not a snapshot\n"), snapshot);
5280 			++errors;
5281 			continue;
5282 		}
5283 		snapname = delim + 1;
5284 		if (recursive)
5285 			snapshot[delim - snapshot] = '\0';
5286 
5287 		cb.cb_recursive = recursive;
5288 		cb.cb_snapname = snapname;
5289 		cb.cb_nvlp = &nvl;
5290 
5291 		/*
5292 		 *  1. collect holds data, set format options
5293 		 */
5294 		ret = zfs_for_each(argc, argv, flags, types, NULL, NULL, limit,
5295 		    holds_callback, &cb);
5296 		if (ret != 0)
5297 			++errors;
5298 	}
5299 
5300 	/*
5301 	 *  2. print holds data
5302 	 */
5303 	print_holds(scripted, cb.cb_max_namelen, cb.cb_max_taglen, nvl);
5304 
5305 	if (nvlist_empty(nvl))
5306 		(void) printf(gettext("no datasets available\n"));
5307 
5308 	nvlist_free(nvl);
5309 
5310 	return (0 != errors);
5311 }
5312 
5313 #define	CHECK_SPINNER 30
5314 #define	SPINNER_TIME 3		/* seconds */
5315 #define	MOUNT_TIME 5		/* seconds */
5316 
5317 static int
5318 get_one_dataset(zfs_handle_t *zhp, void *data)
5319 {
5320 	static char *spin[] = { "-", "\\", "|", "/" };
5321 	static int spinval = 0;
5322 	static int spincheck = 0;
5323 	static time_t last_spin_time = (time_t)0;
5324 	get_all_cb_t *cbp = data;
5325 	zfs_type_t type = zfs_get_type(zhp);
5326 
5327 	if (cbp->cb_verbose) {
5328 		if (--spincheck < 0) {
5329 			time_t now = time(NULL);
5330 			if (last_spin_time + SPINNER_TIME < now) {
5331 				update_progress(spin[spinval++ % 4]);
5332 				last_spin_time = now;
5333 			}
5334 			spincheck = CHECK_SPINNER;
5335 		}
5336 	}
5337 
5338 	/*
5339 	 * Interate over any nested datasets.
5340 	 */
5341 	if (zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
5342 		zfs_close(zhp);
5343 		return (1);
5344 	}
5345 
5346 	/*
5347 	 * Skip any datasets whose type does not match.
5348 	 */
5349 	if ((type & ZFS_TYPE_FILESYSTEM) == 0) {
5350 		zfs_close(zhp);
5351 		return (0);
5352 	}
5353 	libzfs_add_handle(cbp, zhp);
5354 	assert(cbp->cb_used <= cbp->cb_alloc);
5355 
5356 	return (0);
5357 }
5358 
5359 static void
5360 get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
5361 {
5362 	get_all_cb_t cb = { 0 };
5363 	cb.cb_verbose = verbose;
5364 	cb.cb_getone = get_one_dataset;
5365 
5366 	if (verbose)
5367 		set_progress_header(gettext("Reading ZFS config"));
5368 	(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
5369 
5370 	*dslist = cb.cb_handles;
5371 	*count = cb.cb_used;
5372 
5373 	if (verbose)
5374 		finish_progress(gettext("done."));
5375 }
5376 
5377 /*
5378  * Generic callback for sharing or mounting filesystems.  Because the code is so
5379  * similar, we have a common function with an extra parameter to determine which
5380  * mode we are using.
5381  */
5382 #define	OP_SHARE	0x1
5383 #define	OP_MOUNT	0x2
5384 
5385 /*
5386  * Share or mount a dataset.
5387  */
5388 static int
5389 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
5390     boolean_t explicit, const char *options)
5391 {
5392 	char mountpoint[ZFS_MAXPROPLEN];
5393 	char shareopts[ZFS_MAXPROPLEN];
5394 	char smbshareopts[ZFS_MAXPROPLEN];
5395 	const char *cmdname = op == OP_SHARE ? "share" : "mount";
5396 	struct mnttab mnt;
5397 	uint64_t zoned, canmount;
5398 	boolean_t shared_nfs, shared_smb;
5399 
5400 	assert(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM);
5401 
5402 	/*
5403 	 * Check to make sure we can mount/share this dataset.  If we
5404 	 * are in the global zone and the filesystem is exported to a
5405 	 * local zone, or if we are in a local zone and the
5406 	 * filesystem is not exported, then it is an error.
5407 	 */
5408 	zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
5409 
5410 	if (zoned && getzoneid() == GLOBAL_ZONEID) {
5411 		if (!explicit)
5412 			return (0);
5413 
5414 		(void) fprintf(stderr, gettext("cannot %s '%s': "
5415 		    "dataset is exported to a local zone\n"), cmdname,
5416 		    zfs_get_name(zhp));
5417 		return (1);
5418 
5419 	} else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
5420 		if (!explicit)
5421 			return (0);
5422 
5423 		(void) fprintf(stderr, gettext("cannot %s '%s': "
5424 		    "permission denied\n"), cmdname,
5425 		    zfs_get_name(zhp));
5426 		return (1);
5427 	}
5428 
5429 	/*
5430 	 * Ignore any filesystems which don't apply to us. This
5431 	 * includes those with a legacy mountpoint, or those with
5432 	 * legacy share options.
5433 	 */
5434 	verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
5435 	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
5436 	verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
5437 	    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
5438 	verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
5439 	    sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
5440 
5441 	if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
5442 	    strcmp(smbshareopts, "off") == 0) {
5443 		if (!explicit)
5444 			return (0);
5445 
5446 		(void) fprintf(stderr, gettext("cannot share '%s': "
5447 		    "legacy share\n"), zfs_get_name(zhp));
5448 		(void) fprintf(stderr, gettext("use share(1M) to "
5449 		    "share this filesystem, or set "
5450 		    "sharenfs property on\n"));
5451 		return (1);
5452 	}
5453 
5454 	/*
5455 	 * We cannot share or mount legacy filesystems. If the
5456 	 * shareopts is non-legacy but the mountpoint is legacy, we
5457 	 * treat it as a legacy share.
5458 	 */
5459 	if (strcmp(mountpoint, "legacy") == 0) {
5460 		if (!explicit)
5461 			return (0);
5462 
5463 		(void) fprintf(stderr, gettext("cannot %s '%s': "
5464 		    "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
5465 		(void) fprintf(stderr, gettext("use %s(1M) to "
5466 		    "%s this filesystem\n"), cmdname, cmdname);
5467 		return (1);
5468 	}
5469 
5470 	if (strcmp(mountpoint, "none") == 0) {
5471 		if (!explicit)
5472 			return (0);
5473 
5474 		(void) fprintf(stderr, gettext("cannot %s '%s': no "
5475 		    "mountpoint set\n"), cmdname, zfs_get_name(zhp));
5476 		return (1);
5477 	}
5478 
5479 	/*
5480 	 * canmount	explicit	outcome
5481 	 * on		no		pass through
5482 	 * on		yes		pass through
5483 	 * off		no		return 0
5484 	 * off		yes		display error, return 1
5485 	 * noauto	no		return 0
5486 	 * noauto	yes		pass through
5487 	 */
5488 	canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
5489 	if (canmount == ZFS_CANMOUNT_OFF) {
5490 		if (!explicit)
5491 			return (0);
5492 
5493 		(void) fprintf(stderr, gettext("cannot %s '%s': "
5494 		    "'canmount' property is set to 'off'\n"), cmdname,
5495 		    zfs_get_name(zhp));
5496 		return (1);
5497 	} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
5498 		return (0);
5499 	}
5500 
5501 	/*
5502 	 * At this point, we have verified that the mountpoint and/or
5503 	 * shareopts are appropriate for auto management. If the
5504 	 * filesystem is already mounted or shared, return (failing
5505 	 * for explicit requests); otherwise mount or share the
5506 	 * filesystem.
5507 	 */
5508 	switch (op) {
5509 	case OP_SHARE:
5510 
5511 		shared_nfs = zfs_is_shared_nfs(zhp, NULL);
5512 		shared_smb = zfs_is_shared_smb(zhp, NULL);
5513 
5514 		if (shared_nfs && shared_smb ||
5515 		    (shared_nfs && strcmp(shareopts, "on") == 0 &&
5516 		    strcmp(smbshareopts, "off") == 0) ||
5517 		    (shared_smb && strcmp(smbshareopts, "on") == 0 &&
5518 		    strcmp(shareopts, "off") == 0)) {
5519 			if (!explicit)
5520 				return (0);
5521 
5522 			(void) fprintf(stderr, gettext("cannot share "
5523 			    "'%s': filesystem already shared\n"),
5524 			    zfs_get_name(zhp));
5525 			return (1);
5526 		}
5527 
5528 		if (!zfs_is_mounted(zhp, NULL) &&
5529 		    zfs_mount(zhp, NULL, 0) != 0)
5530 			return (1);
5531 
5532 		if (protocol == NULL) {
5533 			if (zfs_shareall(zhp) != 0)
5534 				return (1);
5535 		} else if (strcmp(protocol, "nfs") == 0) {
5536 			if (zfs_share_nfs(zhp))
5537 				return (1);
5538 		} else if (strcmp(protocol, "smb") == 0) {
5539 			if (zfs_share_smb(zhp))
5540 				return (1);
5541 		} else {
5542 			(void) fprintf(stderr, gettext("cannot share "
5543 			    "'%s': invalid share type '%s' "
5544 			    "specified\n"),
5545 			    zfs_get_name(zhp), protocol);
5546 			return (1);
5547 		}
5548 
5549 		break;
5550 
5551 	case OP_MOUNT:
5552 		if (options == NULL)
5553 			mnt.mnt_mntopts = "";
5554 		else
5555 			mnt.mnt_mntopts = (char *)options;
5556 
5557 		if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
5558 		    zfs_is_mounted(zhp, NULL)) {
5559 			if (!explicit)
5560 				return (0);
5561 
5562 			(void) fprintf(stderr, gettext("cannot mount "
5563 			    "'%s': filesystem already mounted\n"),
5564 			    zfs_get_name(zhp));
5565 			return (1);
5566 		}
5567 
5568 		if (zfs_mount(zhp, options, flags) != 0)
5569 			return (1);
5570 		break;
5571 	}
5572 
5573 	return (0);
5574 }
5575 
5576 /*
5577  * Reports progress in the form "(current/total)".  Not thread-safe.
5578  */
5579 static void
5580 report_mount_progress(int current, int total)
5581 {
5582 	static time_t last_progress_time = 0;
5583 	time_t now = time(NULL);
5584 	char info[32];
5585 
5586 	/* report 1..n instead of 0..n-1 */
5587 	++current;
5588 
5589 	/* display header if we're here for the first time */
5590 	if (current == 1) {
5591 		set_progress_header(gettext("Mounting ZFS filesystems"));
5592 	} else if (current != total && last_progress_time + MOUNT_TIME >= now) {
5593 		/* too soon to report again */
5594 		return;
5595 	}
5596 
5597 	last_progress_time = now;
5598 
5599 	(void) sprintf(info, "(%d/%d)", current, total);
5600 
5601 	if (current == total)
5602 		finish_progress(info);
5603 	else
5604 		update_progress(info);
5605 }
5606 
5607 static void
5608 append_options(char *mntopts, char *newopts)
5609 {
5610 	int len = strlen(mntopts);
5611 
5612 	/* original length plus new string to append plus 1 for the comma */
5613 	if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
5614 		(void) fprintf(stderr, gettext("the opts argument for "
5615 		    "'%c' option is too long (more than %d chars)\n"),
5616 		    "-o", MNT_LINE_MAX);
5617 		usage(B_FALSE);
5618 	}
5619 
5620 	if (*mntopts)
5621 		mntopts[len++] = ',';
5622 
5623 	(void) strcpy(&mntopts[len], newopts);
5624 }
5625 
5626 static int
5627 share_mount(int op, int argc, char **argv)
5628 {
5629 	int do_all = 0;
5630 	boolean_t verbose = B_FALSE;
5631 	int c, ret = 0;
5632 	char *options = NULL;
5633 	int flags = 0;
5634 
5635 	/* check options */
5636 	while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
5637 	    != -1) {
5638 		switch (c) {
5639 		case 'a':
5640 			do_all = 1;
5641 			break;
5642 		case 'v':
5643 			verbose = B_TRUE;
5644 			break;
5645 		case 'o':
5646 			if (*optarg == '\0') {
5647 				(void) fprintf(stderr, gettext("empty mount "
5648 				    "options (-o) specified\n"));
5649 				usage(B_FALSE);
5650 			}
5651 
5652 			if (options == NULL)
5653 				options = safe_malloc(MNT_LINE_MAX + 1);
5654 
5655 			/* option validation is done later */
5656 			append_options(options, optarg);
5657 			break;
5658 
5659 		case 'O':
5660 			flags |= MS_OVERLAY;
5661 			break;
5662 		case ':':
5663 			(void) fprintf(stderr, gettext("missing argument for "
5664 			    "'%c' option\n"), optopt);
5665 			usage(B_FALSE);
5666 			break;
5667 		case '?':
5668 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5669 			    optopt);
5670 			usage(B_FALSE);
5671 		}
5672 	}
5673 
5674 	argc -= optind;
5675 	argv += optind;
5676 
5677 	/* check number of arguments */
5678 	if (do_all) {
5679 		zfs_handle_t **dslist = NULL;
5680 		size_t i, count = 0;
5681 		char *protocol = NULL;
5682 
5683 		if (op == OP_SHARE && argc > 0) {
5684 			if (strcmp(argv[0], "nfs") != 0 &&
5685 			    strcmp(argv[0], "smb") != 0) {
5686 				(void) fprintf(stderr, gettext("share type "
5687 				    "must be 'nfs' or 'smb'\n"));
5688 				usage(B_FALSE);
5689 			}
5690 			protocol = argv[0];
5691 			argc--;
5692 			argv++;
5693 		}
5694 
5695 		if (argc != 0) {
5696 			(void) fprintf(stderr, gettext("too many arguments\n"));
5697 			usage(B_FALSE);
5698 		}
5699 
5700 		start_progress_timer();
5701 		get_all_datasets(&dslist, &count, verbose);
5702 
5703 		if (count == 0)
5704 			return (0);
5705 
5706 		qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
5707 
5708 		for (i = 0; i < count; i++) {
5709 			if (verbose)
5710 				report_mount_progress(i, count);
5711 
5712 			if (share_mount_one(dslist[i], op, flags, protocol,
5713 			    B_FALSE, options) != 0)
5714 				ret = 1;
5715 			zfs_close(dslist[i]);
5716 		}
5717 
5718 		free(dslist);
5719 	} else if (argc == 0) {
5720 		struct mnttab entry;
5721 
5722 		if ((op == OP_SHARE) || (options != NULL)) {
5723 			(void) fprintf(stderr, gettext("missing filesystem "
5724 			    "argument (specify -a for all)\n"));
5725 			usage(B_FALSE);
5726 		}
5727 
5728 		/*
5729 		 * When mount is given no arguments, go through /etc/mnttab and
5730 		 * display any active ZFS mounts.  We hide any snapshots, since
5731 		 * they are controlled automatically.
5732 		 */
5733 		rewind(mnttab_file);
5734 		while (getmntent(mnttab_file, &entry) == 0) {
5735 			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
5736 			    strchr(entry.mnt_special, '@') != NULL)
5737 				continue;
5738 
5739 			(void) printf("%-30s  %s\n", entry.mnt_special,
5740 			    entry.mnt_mountp);
5741 		}
5742 
5743 	} else {
5744 		zfs_handle_t *zhp;
5745 
5746 		if (argc > 1) {
5747 			(void) fprintf(stderr,
5748 			    gettext("too many arguments\n"));
5749 			usage(B_FALSE);
5750 		}
5751 
5752 		if ((zhp = zfs_open(g_zfs, argv[0],
5753 		    ZFS_TYPE_FILESYSTEM)) == NULL) {
5754 			ret = 1;
5755 		} else {
5756 			ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
5757 			    options);
5758 			zfs_close(zhp);
5759 		}
5760 	}
5761 
5762 	return (ret);
5763 }
5764 
5765 /*
5766  * zfs mount -a [nfs]
5767  * zfs mount filesystem
5768  *
5769  * Mount all filesystems, or mount the given filesystem.
5770  */
5771 static int
5772 zfs_do_mount(int argc, char **argv)
5773 {
5774 	return (share_mount(OP_MOUNT, argc, argv));
5775 }
5776 
5777 /*
5778  * zfs share -a [nfs | smb]
5779  * zfs share filesystem
5780  *
5781  * Share all filesystems, or share the given filesystem.
5782  */
5783 static int
5784 zfs_do_share(int argc, char **argv)
5785 {
5786 	return (share_mount(OP_SHARE, argc, argv));
5787 }
5788 
5789 typedef struct unshare_unmount_node {
5790 	zfs_handle_t	*un_zhp;
5791 	char		*un_mountp;
5792 	uu_avl_node_t	un_avlnode;
5793 } unshare_unmount_node_t;
5794 
5795 /* ARGSUSED */
5796 static int
5797 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
5798 {
5799 	const unshare_unmount_node_t *l = larg;
5800 	const unshare_unmount_node_t *r = rarg;
5801 
5802 	return (strcmp(l->un_mountp, r->un_mountp));
5803 }
5804 
5805 /*
5806  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
5807  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
5808  * and unmount it appropriately.
5809  */
5810 static int
5811 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
5812 {
5813 	zfs_handle_t *zhp;
5814 	int ret = 0;
5815 	struct stat64 statbuf;
5816 	struct extmnttab entry;
5817 	const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
5818 	ino_t path_inode;
5819 
5820 	/*
5821 	 * Search for the path in /etc/mnttab.  Rather than looking for the
5822 	 * specific path, which can be fooled by non-standard paths (i.e. ".."
5823 	 * or "//"), we stat() the path and search for the corresponding
5824 	 * (major,minor) device pair.
5825 	 */
5826 	if (stat64(path, &statbuf) != 0) {
5827 		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
5828 		    cmdname, path, strerror(errno));
5829 		return (1);
5830 	}
5831 	path_inode = statbuf.st_ino;
5832 
5833 	/*
5834 	 * Search for the given (major,minor) pair in the mount table.
5835 	 */
5836 	rewind(mnttab_file);
5837 	while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
5838 		if (entry.mnt_major == major(statbuf.st_dev) &&
5839 		    entry.mnt_minor == minor(statbuf.st_dev))
5840 			break;
5841 	}
5842 	if (ret != 0) {
5843 		if (op == OP_SHARE) {
5844 			(void) fprintf(stderr, gettext("cannot %s '%s': not "
5845 			    "currently mounted\n"), cmdname, path);
5846 			return (1);
5847 		}
5848 		(void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
5849 		    path);
5850 		if ((ret = umount2(path, flags)) != 0)
5851 			(void) fprintf(stderr, gettext("%s: %s\n"), path,
5852 			    strerror(errno));
5853 		return (ret != 0);
5854 	}
5855 
5856 	if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
5857 		(void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
5858 		    "filesystem\n"), cmdname, path);
5859 		return (1);
5860 	}
5861 
5862 	if ((zhp = zfs_open(g_zfs, entry.mnt_special,
5863 	    ZFS_TYPE_FILESYSTEM)) == NULL)
5864 		return (1);
5865 
5866 	ret = 1;
5867 	if (stat64(entry.mnt_mountp, &statbuf) != 0) {
5868 		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
5869 		    cmdname, path, strerror(errno));
5870 		goto out;
5871 	} else if (statbuf.st_ino != path_inode) {
5872 		(void) fprintf(stderr, gettext("cannot "
5873 		    "%s '%s': not a mountpoint\n"), cmdname, path);
5874 		goto out;
5875 	}
5876 
5877 	if (op == OP_SHARE) {
5878 		char nfs_mnt_prop[ZFS_MAXPROPLEN];
5879 		char smbshare_prop[ZFS_MAXPROPLEN];
5880 
5881 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
5882 		    sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
5883 		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
5884 		    sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
5885 
5886 		if (strcmp(nfs_mnt_prop, "off") == 0 &&
5887 		    strcmp(smbshare_prop, "off") == 0) {
5888 			(void) fprintf(stderr, gettext("cannot unshare "
5889 			    "'%s': legacy share\n"), path);
5890 			(void) fprintf(stderr, gettext("use "
5891 			    "unshare(1M) to unshare this filesystem\n"));
5892 		} else if (!zfs_is_shared(zhp)) {
5893 			(void) fprintf(stderr, gettext("cannot unshare '%s': "
5894 			    "not currently shared\n"), path);
5895 		} else {
5896 			ret = zfs_unshareall_bypath(zhp, path);
5897 		}
5898 	} else {
5899 		char mtpt_prop[ZFS_MAXPROPLEN];
5900 
5901 		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
5902 		    sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
5903 
5904 		if (is_manual) {
5905 			ret = zfs_unmount(zhp, NULL, flags);
5906 		} else if (strcmp(mtpt_prop, "legacy") == 0) {
5907 			(void) fprintf(stderr, gettext("cannot unmount "
5908 			    "'%s': legacy mountpoint\n"),
5909 			    zfs_get_name(zhp));
5910 			(void) fprintf(stderr, gettext("use umount(1M) "
5911 			    "to unmount this filesystem\n"));
5912 		} else {
5913 			ret = zfs_unmountall(zhp, flags);
5914 		}
5915 	}
5916 
5917 out:
5918 	zfs_close(zhp);
5919 
5920 	return (ret != 0);
5921 }
5922 
5923 /*
5924  * Generic callback for unsharing or unmounting a filesystem.
5925  */
5926 static int
5927 unshare_unmount(int op, int argc, char **argv)
5928 {
5929 	int do_all = 0;
5930 	int flags = 0;
5931 	int ret = 0;
5932 	int c;
5933 	zfs_handle_t *zhp;
5934 	char nfs_mnt_prop[ZFS_MAXPROPLEN];
5935 	char sharesmb[ZFS_MAXPROPLEN];
5936 
5937 	/* check options */
5938 	while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
5939 		switch (c) {
5940 		case 'a':
5941 			do_all = 1;
5942 			break;
5943 		case 'f':
5944 			flags = MS_FORCE;
5945 			break;
5946 		case '?':
5947 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5948 			    optopt);
5949 			usage(B_FALSE);
5950 		}
5951 	}
5952 
5953 	argc -= optind;
5954 	argv += optind;
5955 
5956 	if (do_all) {
5957 		/*
5958 		 * We could make use of zfs_for_each() to walk all datasets in
5959 		 * the system, but this would be very inefficient, especially
5960 		 * since we would have to linearly search /etc/mnttab for each
5961 		 * one.  Instead, do one pass through /etc/mnttab looking for
5962 		 * zfs entries and call zfs_unmount() for each one.
5963 		 *
5964 		 * Things get a little tricky if the administrator has created
5965 		 * mountpoints beneath other ZFS filesystems.  In this case, we
5966 		 * have to unmount the deepest filesystems first.  To accomplish
5967 		 * this, we place all the mountpoints in an AVL tree sorted by
5968 		 * the special type (dataset name), and walk the result in
5969 		 * reverse to make sure to get any snapshots first.
5970 		 */
5971 		struct mnttab entry;
5972 		uu_avl_pool_t *pool;
5973 		uu_avl_t *tree;
5974 		unshare_unmount_node_t *node;
5975 		uu_avl_index_t idx;
5976 		uu_avl_walk_t *walk;
5977 
5978 		if (argc != 0) {
5979 			(void) fprintf(stderr, gettext("too many arguments\n"));
5980 			usage(B_FALSE);
5981 		}
5982 
5983 		if (((pool = uu_avl_pool_create("unmount_pool",
5984 		    sizeof (unshare_unmount_node_t),
5985 		    offsetof(unshare_unmount_node_t, un_avlnode),
5986 		    unshare_unmount_compare, UU_DEFAULT)) == NULL) ||
5987 		    ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL))
5988 			nomem();
5989 
5990 		rewind(mnttab_file);
5991 		while (getmntent(mnttab_file, &entry) == 0) {
5992 
5993 			/* ignore non-ZFS entries */
5994 			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
5995 				continue;
5996 
5997 			/* ignore snapshots */
5998 			if (strchr(entry.mnt_special, '@') != NULL)
5999 				continue;
6000 
6001 			if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6002 			    ZFS_TYPE_FILESYSTEM)) == NULL) {
6003 				ret = 1;
6004 				continue;
6005 			}
6006 
6007 			switch (op) {
6008 			case OP_SHARE:
6009 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6010 				    nfs_mnt_prop,
6011 				    sizeof (nfs_mnt_prop),
6012 				    NULL, NULL, 0, B_FALSE) == 0);
6013 				if (strcmp(nfs_mnt_prop, "off") != 0)
6014 					break;
6015 				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6016 				    nfs_mnt_prop,
6017 				    sizeof (nfs_mnt_prop),
6018 				    NULL, NULL, 0, B_FALSE) == 0);
6019 				if (strcmp(nfs_mnt_prop, "off") == 0)
6020 					continue;
6021 				break;
6022 			case OP_MOUNT:
6023 				/* Ignore legacy mounts */
6024 				verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
6025 				    nfs_mnt_prop,
6026 				    sizeof (nfs_mnt_prop),
6027 				    NULL, NULL, 0, B_FALSE) == 0);
6028 				if (strcmp(nfs_mnt_prop, "legacy") == 0)
6029 					continue;
6030 				/* Ignore canmount=noauto mounts */
6031 				if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
6032 				    ZFS_CANMOUNT_NOAUTO)
6033 					continue;
6034 			default:
6035 				break;
6036 			}
6037 
6038 			node = safe_malloc(sizeof (unshare_unmount_node_t));
6039 			node->un_zhp = zhp;
6040 			node->un_mountp = safe_strdup(entry.mnt_mountp);
6041 
6042 			uu_avl_node_init(node, &node->un_avlnode, pool);
6043 
6044 			if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
6045 				uu_avl_insert(tree, node, idx);
6046 			} else {
6047 				zfs_close(node->un_zhp);
6048 				free(node->un_mountp);
6049 				free(node);
6050 			}
6051 		}
6052 
6053 		/*
6054 		 * Walk the AVL tree in reverse, unmounting each filesystem and
6055 		 * removing it from the AVL tree in the process.
6056 		 */
6057 		if ((walk = uu_avl_walk_start(tree,
6058 		    UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL)
6059 			nomem();
6060 
6061 		while ((node = uu_avl_walk_next(walk)) != NULL) {
6062 			uu_avl_remove(tree, node);
6063 
6064 			switch (op) {
6065 			case OP_SHARE:
6066 				if (zfs_unshareall_bypath(node->un_zhp,
6067 				    node->un_mountp) != 0)
6068 					ret = 1;
6069 				break;
6070 
6071 			case OP_MOUNT:
6072 				if (zfs_unmount(node->un_zhp,
6073 				    node->un_mountp, flags) != 0)
6074 					ret = 1;
6075 				break;
6076 			}
6077 
6078 			zfs_close(node->un_zhp);
6079 			free(node->un_mountp);
6080 			free(node);
6081 		}
6082 
6083 		uu_avl_walk_end(walk);
6084 		uu_avl_destroy(tree);
6085 		uu_avl_pool_destroy(pool);
6086 
6087 	} else {
6088 		if (argc != 1) {
6089 			if (argc == 0)
6090 				(void) fprintf(stderr,
6091 				    gettext("missing filesystem argument\n"));
6092 			else
6093 				(void) fprintf(stderr,
6094 				    gettext("too many arguments\n"));
6095 			usage(B_FALSE);
6096 		}
6097 
6098 		/*
6099 		 * We have an argument, but it may be a full path or a ZFS
6100 		 * filesystem.  Pass full paths off to unmount_path() (shared by
6101 		 * manual_unmount), otherwise open the filesystem and pass to
6102 		 * zfs_unmount().
6103 		 */
6104 		if (argv[0][0] == '/')
6105 			return (unshare_unmount_path(op, argv[0],
6106 			    flags, B_FALSE));
6107 
6108 		if ((zhp = zfs_open(g_zfs, argv[0],
6109 		    ZFS_TYPE_FILESYSTEM)) == NULL)
6110 			return (1);
6111 
6112 		verify(zfs_prop_get(zhp, op == OP_SHARE ?
6113 		    ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
6114 		    nfs_mnt_prop, sizeof (nfs_mnt_prop), NULL,
6115 		    NULL, 0, B_FALSE) == 0);
6116 
6117 		switch (op) {
6118 		case OP_SHARE:
6119 			verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6120 			    nfs_mnt_prop,
6121 			    sizeof (nfs_mnt_prop),
6122 			    NULL, NULL, 0, B_FALSE) == 0);
6123 			verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6124 			    sharesmb, sizeof (sharesmb), NULL, NULL,
6125 			    0, B_FALSE) == 0);
6126 
6127 			if (strcmp(nfs_mnt_prop, "off") == 0 &&
6128 			    strcmp(sharesmb, "off") == 0) {
6129 				(void) fprintf(stderr, gettext("cannot "
6130 				    "unshare '%s': legacy share\n"),
6131 				    zfs_get_name(zhp));
6132 				(void) fprintf(stderr, gettext("use "
6133 				    "unshare(1M) to unshare this "
6134 				    "filesystem\n"));
6135 				ret = 1;
6136 			} else if (!zfs_is_shared(zhp)) {
6137 				(void) fprintf(stderr, gettext("cannot "
6138 				    "unshare '%s': not currently "
6139 				    "shared\n"), zfs_get_name(zhp));
6140 				ret = 1;
6141 			} else if (zfs_unshareall(zhp) != 0) {
6142 				ret = 1;
6143 			}
6144 			break;
6145 
6146 		case OP_MOUNT:
6147 			if (strcmp(nfs_mnt_prop, "legacy") == 0) {
6148 				(void) fprintf(stderr, gettext("cannot "
6149 				    "unmount '%s': legacy "
6150 				    "mountpoint\n"), zfs_get_name(zhp));
6151 				(void) fprintf(stderr, gettext("use "
6152 				    "umount(1M) to unmount this "
6153 				    "filesystem\n"));
6154 				ret = 1;
6155 			} else if (!zfs_is_mounted(zhp, NULL)) {
6156 				(void) fprintf(stderr, gettext("cannot "
6157 				    "unmount '%s': not currently "
6158 				    "mounted\n"),
6159 				    zfs_get_name(zhp));
6160 				ret = 1;
6161 			} else if (zfs_unmountall(zhp, flags) != 0) {
6162 				ret = 1;
6163 			}
6164 			break;
6165 		}
6166 
6167 		zfs_close(zhp);
6168 	}
6169 
6170 	return (ret);
6171 }
6172 
6173 /*
6174  * zfs unmount -a
6175  * zfs unmount filesystem
6176  *
6177  * Unmount all filesystems, or a specific ZFS filesystem.
6178  */
6179 static int
6180 zfs_do_unmount(int argc, char **argv)
6181 {
6182 	return (unshare_unmount(OP_MOUNT, argc, argv));
6183 }
6184 
6185 /*
6186  * zfs unshare -a
6187  * zfs unshare filesystem
6188  *
6189  * Unshare all filesystems, or a specific ZFS filesystem.
6190  */
6191 static int
6192 zfs_do_unshare(int argc, char **argv)
6193 {
6194 	return (unshare_unmount(OP_SHARE, argc, argv));
6195 }
6196 
6197 /*
6198  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
6199  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
6200  */
6201 static int
6202 manual_mount(int argc, char **argv)
6203 {
6204 	zfs_handle_t *zhp;
6205 	char mountpoint[ZFS_MAXPROPLEN];
6206 	char mntopts[MNT_LINE_MAX] = { '\0' };
6207 	int ret = 0;
6208 	int c;
6209 	int flags = 0;
6210 	char *dataset, *path;
6211 
6212 	/* check options */
6213 	while ((c = getopt(argc, argv, ":mo:O")) != -1) {
6214 		switch (c) {
6215 		case 'o':
6216 			(void) strlcpy(mntopts, optarg, sizeof (mntopts));
6217 			break;
6218 		case 'O':
6219 			flags |= MS_OVERLAY;
6220 			break;
6221 		case 'm':
6222 			flags |= MS_NOMNTTAB;
6223 			break;
6224 		case ':':
6225 			(void) fprintf(stderr, gettext("missing argument for "
6226 			    "'%c' option\n"), optopt);
6227 			usage(B_FALSE);
6228 			break;
6229 		case '?':
6230 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6231 			    optopt);
6232 			(void) fprintf(stderr, gettext("usage: mount [-o opts] "
6233 			    "<path>\n"));
6234 			return (2);
6235 		}
6236 	}
6237 
6238 	argc -= optind;
6239 	argv += optind;
6240 
6241 	/* check that we only have two arguments */
6242 	if (argc != 2) {
6243 		if (argc == 0)
6244 			(void) fprintf(stderr, gettext("missing dataset "
6245 			    "argument\n"));
6246 		else if (argc == 1)
6247 			(void) fprintf(stderr,
6248 			    gettext("missing mountpoint argument\n"));
6249 		else
6250 			(void) fprintf(stderr, gettext("too many arguments\n"));
6251 		(void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
6252 		return (2);
6253 	}
6254 
6255 	dataset = argv[0];
6256 	path = argv[1];
6257 
6258 	/* try to open the dataset */
6259 	if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
6260 		return (1);
6261 
6262 	(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
6263 	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
6264 
6265 	/* check for legacy mountpoint and complain appropriately */
6266 	ret = 0;
6267 	if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
6268 		if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
6269 		    NULL, 0, mntopts, sizeof (mntopts)) != 0) {
6270 			(void) fprintf(stderr, gettext("mount failed: %s\n"),
6271 			    strerror(errno));
6272 			ret = 1;
6273 		}
6274 	} else {
6275 		(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
6276 		    "mounted using 'mount -F zfs'\n"), dataset);
6277 		(void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
6278 		    "instead.\n"), path);
6279 		(void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
6280 		    "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
6281 		(void) fprintf(stderr, gettext("See zfs(1M) for more "
6282 		    "information.\n"));
6283 		ret = 1;
6284 	}
6285 
6286 	return (ret);
6287 }
6288 
6289 /*
6290  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
6291  * unmounts of non-legacy filesystems, as this is the dominant administrative
6292  * interface.
6293  */
6294 static int
6295 manual_unmount(int argc, char **argv)
6296 {
6297 	int flags = 0;
6298 	int c;
6299 
6300 	/* check options */
6301 	while ((c = getopt(argc, argv, "f")) != -1) {
6302 		switch (c) {
6303 		case 'f':
6304 			flags = MS_FORCE;
6305 			break;
6306 		case '?':
6307 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6308 			    optopt);
6309 			(void) fprintf(stderr, gettext("usage: unmount [-f] "
6310 			    "<path>\n"));
6311 			return (2);
6312 		}
6313 	}
6314 
6315 	argc -= optind;
6316 	argv += optind;
6317 
6318 	/* check arguments */
6319 	if (argc != 1) {
6320 		if (argc == 0)
6321 			(void) fprintf(stderr, gettext("missing path "
6322 			    "argument\n"));
6323 		else
6324 			(void) fprintf(stderr, gettext("too many arguments\n"));
6325 		(void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
6326 		return (2);
6327 	}
6328 
6329 	return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
6330 }
6331 
6332 static int
6333 find_command_idx(char *command, int *idx)
6334 {
6335 	int i;
6336 
6337 	for (i = 0; i < NCOMMAND; i++) {
6338 		if (command_table[i].name == NULL)
6339 			continue;
6340 
6341 		if (strcmp(command, command_table[i].name) == 0) {
6342 			*idx = i;
6343 			return (0);
6344 		}
6345 	}
6346 	return (1);
6347 }
6348 
6349 static int
6350 zfs_do_diff(int argc, char **argv)
6351 {
6352 	zfs_handle_t *zhp;
6353 	int flags = 0;
6354 	char *tosnap = NULL;
6355 	char *fromsnap = NULL;
6356 	char *atp, *copy;
6357 	int err = 0;
6358 	int c;
6359 
6360 	while ((c = getopt(argc, argv, "FHt")) != -1) {
6361 		switch (c) {
6362 		case 'F':
6363 			flags |= ZFS_DIFF_CLASSIFY;
6364 			break;
6365 		case 'H':
6366 			flags |= ZFS_DIFF_PARSEABLE;
6367 			break;
6368 		case 't':
6369 			flags |= ZFS_DIFF_TIMESTAMP;
6370 			break;
6371 		default:
6372 			(void) fprintf(stderr,
6373 			    gettext("invalid option '%c'\n"), optopt);
6374 			usage(B_FALSE);
6375 		}
6376 	}
6377 
6378 	argc -= optind;
6379 	argv += optind;
6380 
6381 	if (argc < 1) {
6382 		(void) fprintf(stderr,
6383 		gettext("must provide at least one snapshot name\n"));
6384 		usage(B_FALSE);
6385 	}
6386 
6387 	if (argc > 2) {
6388 		(void) fprintf(stderr, gettext("too many arguments\n"));
6389 		usage(B_FALSE);
6390 	}
6391 
6392 	fromsnap = argv[0];
6393 	tosnap = (argc == 2) ? argv[1] : NULL;
6394 
6395 	copy = NULL;
6396 	if (*fromsnap != '@')
6397 		copy = strdup(fromsnap);
6398 	else if (tosnap)
6399 		copy = strdup(tosnap);
6400 	if (copy == NULL)
6401 		usage(B_FALSE);
6402 
6403 	if (atp = strchr(copy, '@'))
6404 		*atp = '\0';
6405 
6406 	if ((zhp = zfs_open(g_zfs, copy, ZFS_TYPE_FILESYSTEM)) == NULL)
6407 		return (1);
6408 
6409 	free(copy);
6410 
6411 	/*
6412 	 * Ignore SIGPIPE so that the library can give us
6413 	 * information on any failure
6414 	 */
6415 	(void) sigignore(SIGPIPE);
6416 
6417 	err = zfs_show_diffs(zhp, STDOUT_FILENO, fromsnap, tosnap, flags);
6418 
6419 	zfs_close(zhp);
6420 
6421 	return (err != 0);
6422 }
6423 
6424 int
6425 main(int argc, char **argv)
6426 {
6427 	int ret = 0;
6428 	int i;
6429 	char *progname;
6430 	char *cmdname;
6431 
6432 	(void) setlocale(LC_ALL, "");
6433 	(void) textdomain(TEXT_DOMAIN);
6434 
6435 	opterr = 0;
6436 
6437 	if ((g_zfs = libzfs_init()) == NULL) {
6438 		(void) fprintf(stderr, gettext("internal error: failed to "
6439 		    "initialize ZFS library\n"));
6440 		return (1);
6441 	}
6442 
6443 	zpool_set_history_str("zfs", argc, argv, history_str);
6444 	verify(zpool_stage_history(g_zfs, history_str) == 0);
6445 
6446 	libzfs_print_on_error(g_zfs, B_TRUE);
6447 
6448 	if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
6449 		(void) fprintf(stderr, gettext("internal error: unable to "
6450 		    "open %s\n"), MNTTAB);
6451 		return (1);
6452 	}
6453 
6454 	/*
6455 	 * This command also doubles as the /etc/fs mount and unmount program.
6456 	 * Determine if we should take this behavior based on argv[0].
6457 	 */
6458 	progname = basename(argv[0]);
6459 	if (strcmp(progname, "mount") == 0) {
6460 		ret = manual_mount(argc, argv);
6461 	} else if (strcmp(progname, "umount") == 0) {
6462 		ret = manual_unmount(argc, argv);
6463 	} else {
6464 		/*
6465 		 * Make sure the user has specified some command.
6466 		 */
6467 		if (argc < 2) {
6468 			(void) fprintf(stderr, gettext("missing command\n"));
6469 			usage(B_FALSE);
6470 		}
6471 
6472 		cmdname = argv[1];
6473 
6474 		/*
6475 		 * The 'umount' command is an alias for 'unmount'
6476 		 */
6477 		if (strcmp(cmdname, "umount") == 0)
6478 			cmdname = "unmount";
6479 
6480 		/*
6481 		 * The 'recv' command is an alias for 'receive'
6482 		 */
6483 		if (strcmp(cmdname, "recv") == 0)
6484 			cmdname = "receive";
6485 
6486 		/*
6487 		 * Special case '-?'
6488 		 */
6489 		if (strcmp(cmdname, "-?") == 0)
6490 			usage(B_TRUE);
6491 
6492 		/*
6493 		 * Run the appropriate command.
6494 		 */
6495 		libzfs_mnttab_cache(g_zfs, B_TRUE);
6496 		if (find_command_idx(cmdname, &i) == 0) {
6497 			current_command = &command_table[i];
6498 			ret = command_table[i].func(argc - 1, argv + 1);
6499 		} else if (strchr(cmdname, '=') != NULL) {
6500 			verify(find_command_idx("set", &i) == 0);
6501 			current_command = &command_table[i];
6502 			ret = command_table[i].func(argc, argv);
6503 		} else {
6504 			(void) fprintf(stderr, gettext("unrecognized "
6505 			    "command '%s'\n"), cmdname);
6506 			usage(B_FALSE);
6507 		}
6508 		libzfs_mnttab_cache(g_zfs, B_FALSE);
6509 	}
6510 
6511 	(void) fclose(mnttab_file);
6512 
6513 	libzfs_fini(g_zfs);
6514 
6515 	/*
6516 	 * The 'ZFS_ABORT' environment variable causes us to dump core on exit
6517 	 * for the purposes of running ::findleaks.
6518 	 */
6519 	if (getenv("ZFS_ABORT") != NULL) {
6520 		(void) printf("dumping core by request\n");
6521 		abort();
6522 	}
6523 
6524 	return (ret);
6525 }
6526