zfs_main.c revision 307120 
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 (c) 2011, 2015 by Delphix. All rights reserved.
25 * Copyright 2012 Milan Jurik. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
28 * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland.  All rights reserved.
30 * Copyright (c) 2014 Integros [integros.com]
31 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
32 * Copyright 2016 Nexenta Systems, Inc.
33 */
34
35#include <assert.h>
36#include <ctype.h>
37#include <errno.h>
38#include <libgen.h>
39#include <libintl.h>
40#include <libuutil.h>
41#include <libnvpair.h>
42#include <locale.h>
43#include <stddef.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <strings.h>
47#include <unistd.h>
48#include <fcntl.h>
49#include <zone.h>
50#include <grp.h>
51#include <pwd.h>
52#include <signal.h>
53#include <sys/list.h>
54#include <sys/mntent.h>
55#include <sys/mnttab.h>
56#include <sys/mount.h>
57#include <sys/stat.h>
58#include <sys/fs/zfs.h>
59#include <sys/types.h>
60#include <time.h>
61#include <err.h>
62#include <jail.h>
63
64#include <libzfs.h>
65#include <libzfs_core.h>
66#include <zfs_prop.h>
67#include <zfs_deleg.h>
68#include <libuutil.h>
69#ifdef illumos
70#include <aclutils.h>
71#include <directory.h>
72#include <idmap.h>
73#endif
74
75#include "zfs_iter.h"
76#include "zfs_util.h"
77#include "zfs_comutil.h"
78
79libzfs_handle_t *g_zfs;
80
81static FILE *mnttab_file;
82static char history_str[HIS_MAX_RECORD_LEN];
83static boolean_t log_history = B_TRUE;
84
85static int zfs_do_clone(int argc, char **argv);
86static int zfs_do_create(int argc, char **argv);
87static int zfs_do_destroy(int argc, char **argv);
88static int zfs_do_get(int argc, char **argv);
89static int zfs_do_inherit(int argc, char **argv);
90static int zfs_do_list(int argc, char **argv);
91static int zfs_do_mount(int argc, char **argv);
92static int zfs_do_rename(int argc, char **argv);
93static int zfs_do_rollback(int argc, char **argv);
94static int zfs_do_set(int argc, char **argv);
95static int zfs_do_upgrade(int argc, char **argv);
96static int zfs_do_snapshot(int argc, char **argv);
97static int zfs_do_unmount(int argc, char **argv);
98static int zfs_do_share(int argc, char **argv);
99static int zfs_do_unshare(int argc, char **argv);
100static int zfs_do_send(int argc, char **argv);
101static int zfs_do_receive(int argc, char **argv);
102static int zfs_do_promote(int argc, char **argv);
103static int zfs_do_userspace(int argc, char **argv);
104static int zfs_do_allow(int argc, char **argv);
105static int zfs_do_unallow(int argc, char **argv);
106static int zfs_do_hold(int argc, char **argv);
107static int zfs_do_holds(int argc, char **argv);
108static int zfs_do_release(int argc, char **argv);
109static int zfs_do_diff(int argc, char **argv);
110static int zfs_do_jail(int argc, char **argv);
111static int zfs_do_unjail(int argc, char **argv);
112static int zfs_do_bookmark(int argc, char **argv);
113
114/*
115 * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
116 */
117
118#ifdef DEBUG
119const char *
120_umem_debug_init(void)
121{
122	return ("default,verbose"); /* $UMEM_DEBUG setting */
123}
124
125const char *
126_umem_logging_init(void)
127{
128	return ("fail,contents"); /* $UMEM_LOGGING setting */
129}
130#endif
131
132typedef enum {
133	HELP_CLONE,
134	HELP_CREATE,
135	HELP_DESTROY,
136	HELP_GET,
137	HELP_INHERIT,
138	HELP_UPGRADE,
139	HELP_JAIL,
140	HELP_UNJAIL,
141	HELP_LIST,
142	HELP_MOUNT,
143	HELP_PROMOTE,
144	HELP_RECEIVE,
145	HELP_RENAME,
146	HELP_ROLLBACK,
147	HELP_SEND,
148	HELP_SET,
149	HELP_SHARE,
150	HELP_SNAPSHOT,
151	HELP_UNMOUNT,
152	HELP_UNSHARE,
153	HELP_ALLOW,
154	HELP_UNALLOW,
155	HELP_USERSPACE,
156	HELP_GROUPSPACE,
157	HELP_HOLD,
158	HELP_HOLDS,
159	HELP_RELEASE,
160	HELP_DIFF,
161	HELP_BOOKMARK,
162} zfs_help_t;
163
164typedef struct zfs_command {
165	const char	*name;
166	int		(*func)(int argc, char **argv);
167	zfs_help_t	usage;
168} zfs_command_t;
169
170/*
171 * Master command table.  Each ZFS command has a name, associated function, and
172 * usage message.  The usage messages need to be internationalized, so we have
173 * to have a function to return the usage message based on a command index.
174 *
175 * These commands are organized according to how they are displayed in the usage
176 * message.  An empty command (one with a NULL name) indicates an empty line in
177 * the generic usage message.
178 */
179static zfs_command_t command_table[] = {
180	{ "create",	zfs_do_create,		HELP_CREATE		},
181	{ "destroy",	zfs_do_destroy,		HELP_DESTROY		},
182	{ NULL },
183	{ "snapshot",	zfs_do_snapshot,	HELP_SNAPSHOT		},
184	{ "rollback",	zfs_do_rollback,	HELP_ROLLBACK		},
185	{ "clone",	zfs_do_clone,		HELP_CLONE		},
186	{ "promote",	zfs_do_promote,		HELP_PROMOTE		},
187	{ "rename",	zfs_do_rename,		HELP_RENAME		},
188	{ "bookmark",	zfs_do_bookmark,	HELP_BOOKMARK		},
189	{ NULL },
190	{ "list",	zfs_do_list,		HELP_LIST		},
191	{ NULL },
192	{ "set",	zfs_do_set,		HELP_SET		},
193	{ "get",	zfs_do_get,		HELP_GET		},
194	{ "inherit",	zfs_do_inherit,		HELP_INHERIT		},
195	{ "upgrade",	zfs_do_upgrade,		HELP_UPGRADE		},
196	{ "userspace",	zfs_do_userspace,	HELP_USERSPACE		},
197	{ "groupspace",	zfs_do_userspace,	HELP_GROUPSPACE		},
198	{ NULL },
199	{ "mount",	zfs_do_mount,		HELP_MOUNT		},
200	{ "unmount",	zfs_do_unmount,		HELP_UNMOUNT		},
201	{ "share",	zfs_do_share,		HELP_SHARE		},
202	{ "unshare",	zfs_do_unshare,		HELP_UNSHARE		},
203	{ NULL },
204	{ "send",	zfs_do_send,		HELP_SEND		},
205	{ "receive",	zfs_do_receive,		HELP_RECEIVE		},
206	{ NULL },
207	{ "allow",	zfs_do_allow,		HELP_ALLOW		},
208	{ NULL },
209	{ "unallow",	zfs_do_unallow,		HELP_UNALLOW		},
210	{ NULL },
211	{ "hold",	zfs_do_hold,		HELP_HOLD		},
212	{ "holds",	zfs_do_holds,		HELP_HOLDS		},
213	{ "release",	zfs_do_release,		HELP_RELEASE		},
214	{ "diff",	zfs_do_diff,		HELP_DIFF		},
215	{ NULL },
216	{ "jail",	zfs_do_jail,		HELP_JAIL		},
217	{ "unjail",	zfs_do_unjail,		HELP_UNJAIL		},
218};
219
220#define	NCOMMAND	(sizeof (command_table) / sizeof (command_table[0]))
221
222zfs_command_t *current_command;
223
224static const char *
225get_usage(zfs_help_t idx)
226{
227	switch (idx) {
228	case HELP_CLONE:
229		return (gettext("\tclone [-p] [-o property=value] ... "
230		    "<snapshot> <filesystem|volume>\n"));
231	case HELP_CREATE:
232		return (gettext("\tcreate [-pu] [-o property=value] ... "
233		    "<filesystem>\n"
234		    "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
235		    "-V <size> <volume>\n"));
236	case HELP_DESTROY:
237		return (gettext("\tdestroy [-fnpRrv] <filesystem|volume>\n"
238		    "\tdestroy [-dnpRrv] "
239		    "<filesystem|volume>@<snap>[%<snap>][,...]\n"
240		    "\tdestroy <filesystem|volume>#<bookmark>\n"));
241	case HELP_GET:
242		return (gettext("\tget [-rHp] [-d max] "
243		    "[-o \"all\" | field[,...]]\n"
244		    "\t    [-t type[,...]] [-s source[,...]]\n"
245		    "\t    <\"all\" | property[,...]> "
246		    "[filesystem|volume|snapshot] ...\n"));
247	case HELP_INHERIT:
248		return (gettext("\tinherit [-rS] <property> "
249		    "<filesystem|volume|snapshot> ...\n"));
250	case HELP_UPGRADE:
251		return (gettext("\tupgrade [-v]\n"
252		    "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
253	case HELP_JAIL:
254		return (gettext("\tjail <jailid|jailname> <filesystem>\n"));
255	case HELP_UNJAIL:
256		return (gettext("\tunjail <jailid|jailname> <filesystem>\n"));
257	case HELP_LIST:
258		return (gettext("\tlist [-Hp] [-r|-d max] [-o property[,...]] "
259		    "[-s property]...\n\t    [-S property]... [-t type[,...]] "
260		    "[filesystem|volume|snapshot] ...\n"));
261	case HELP_MOUNT:
262		return (gettext("\tmount\n"
263		    "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
264	case HELP_PROMOTE:
265		return (gettext("\tpromote <clone-filesystem>\n"));
266	case HELP_RECEIVE:
267		return (gettext("\treceive|recv [-vnsFu] <filesystem|volume|"
268		    "snapshot>\n"
269		    "\treceive|recv [-vnsFu] [-o origin=<snapshot>] [-d | -e] "
270		    "<filesystem>\n"
271		    "\treceive|recv -A <filesystem|volume>\n"));
272	case HELP_RENAME:
273		return (gettext("\trename [-f] <filesystem|volume|snapshot> "
274		    "<filesystem|volume|snapshot>\n"
275		    "\trename [-f] -p <filesystem|volume> <filesystem|volume>\n"
276		    "\trename -r <snapshot> <snapshot>\n"
277		    "\trename -u [-p] <filesystem> <filesystem>"));
278	case HELP_ROLLBACK:
279		return (gettext("\trollback [-rRf] <snapshot>\n"));
280	case HELP_SEND:
281		return (gettext("\tsend [-DnPpRvLe] [-[iI] snapshot] "
282		    "<snapshot>\n"
283		    "\tsend [-Le] [-i snapshot|bookmark] "
284		    "<filesystem|volume|snapshot>\n"
285		    "\tsend [-nvPe] -t <receive_resume_token>\n"));
286	case HELP_SET:
287		return (gettext("\tset <property=value> ... "
288		    "<filesystem|volume|snapshot> ...\n"));
289	case HELP_SHARE:
290		return (gettext("\tshare <-a | filesystem>\n"));
291	case HELP_SNAPSHOT:
292		return (gettext("\tsnapshot|snap [-r] [-o property=value] ... "
293		    "<filesystem|volume>@<snap> ...\n"));
294	case HELP_UNMOUNT:
295		return (gettext("\tunmount|umount [-f] "
296		    "<-a | filesystem|mountpoint>\n"));
297	case HELP_UNSHARE:
298		return (gettext("\tunshare "
299		    "<-a | filesystem|mountpoint>\n"));
300	case HELP_ALLOW:
301		return (gettext("\tallow <filesystem|volume>\n"
302		    "\tallow [-ldug] "
303		    "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
304		    "\t    <filesystem|volume>\n"
305		    "\tallow [-ld] -e <perm|@setname>[,...] "
306		    "<filesystem|volume>\n"
307		    "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
308		    "\tallow -s @setname <perm|@setname>[,...] "
309		    "<filesystem|volume>\n"));
310	case HELP_UNALLOW:
311		return (gettext("\tunallow [-rldug] "
312		    "<\"everyone\"|user|group>[,...]\n"
313		    "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
314		    "\tunallow [-rld] -e [<perm|@setname>[,...]] "
315		    "<filesystem|volume>\n"
316		    "\tunallow [-r] -c [<perm|@setname>[,...]] "
317		    "<filesystem|volume>\n"
318		    "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
319		    "<filesystem|volume>\n"));
320	case HELP_USERSPACE:
321		return (gettext("\tuserspace [-Hinp] [-o field[,...]] "
322		    "[-s field] ...\n"
323		    "\t    [-S field] ... [-t type[,...]] "
324		    "<filesystem|snapshot>\n"));
325	case HELP_GROUPSPACE:
326		return (gettext("\tgroupspace [-Hinp] [-o field[,...]] "
327		    "[-s field] ...\n"
328		    "\t    [-S field] ... [-t type[,...]] "
329		    "<filesystem|snapshot>\n"));
330	case HELP_HOLD:
331		return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
332	case HELP_HOLDS:
333		return (gettext("\tholds [-r] <snapshot> ...\n"));
334	case HELP_RELEASE:
335		return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
336	case HELP_DIFF:
337		return (gettext("\tdiff [-FHt] <snapshot> "
338		    "[snapshot|filesystem]\n"));
339	case HELP_BOOKMARK:
340		return (gettext("\tbookmark <snapshot> <bookmark>\n"));
341	}
342
343	abort();
344	/* NOTREACHED */
345}
346
347void
348nomem(void)
349{
350	(void) fprintf(stderr, gettext("internal error: out of memory\n"));
351	exit(1);
352}
353
354/*
355 * Utility function to guarantee malloc() success.
356 */
357
358void *
359safe_malloc(size_t size)
360{
361	void *data;
362
363	if ((data = calloc(1, size)) == NULL)
364		nomem();
365
366	return (data);
367}
368
369static char *
370safe_strdup(char *str)
371{
372	char *dupstr = strdup(str);
373
374	if (dupstr == NULL)
375		nomem();
376
377	return (dupstr);
378}
379
380/*
381 * Callback routine that will print out information for each of
382 * the properties.
383 */
384static int
385usage_prop_cb(int prop, void *cb)
386{
387	FILE *fp = cb;
388
389	(void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
390
391	if (zfs_prop_readonly(prop))
392		(void) fprintf(fp, " NO    ");
393	else
394		(void) fprintf(fp, "YES    ");
395
396	if (zfs_prop_inheritable(prop))
397		(void) fprintf(fp, "  YES   ");
398	else
399		(void) fprintf(fp, "   NO   ");
400
401	if (zfs_prop_values(prop) == NULL)
402		(void) fprintf(fp, "-\n");
403	else
404		(void) fprintf(fp, "%s\n", zfs_prop_values(prop));
405
406	return (ZPROP_CONT);
407}
408
409/*
410 * Display usage message.  If we're inside a command, display only the usage for
411 * that command.  Otherwise, iterate over the entire command table and display
412 * a complete usage message.
413 */
414static void
415usage(boolean_t requested)
416{
417	int i;
418	boolean_t show_properties = B_FALSE;
419	FILE *fp = requested ? stdout : stderr;
420
421	if (current_command == NULL) {
422
423		(void) fprintf(fp, gettext("usage: zfs command args ...\n"));
424		(void) fprintf(fp,
425		    gettext("where 'command' is one of the following:\n\n"));
426
427		for (i = 0; i < NCOMMAND; i++) {
428			if (command_table[i].name == NULL)
429				(void) fprintf(fp, "\n");
430			else
431				(void) fprintf(fp, "%s",
432				    get_usage(command_table[i].usage));
433		}
434
435		(void) fprintf(fp, gettext("\nEach dataset is of the form: "
436		    "pool/[dataset/]*dataset[@name]\n"));
437	} else {
438		(void) fprintf(fp, gettext("usage:\n"));
439		(void) fprintf(fp, "%s", get_usage(current_command->usage));
440	}
441
442	if (current_command != NULL &&
443	    (strcmp(current_command->name, "set") == 0 ||
444	    strcmp(current_command->name, "get") == 0 ||
445	    strcmp(current_command->name, "inherit") == 0 ||
446	    strcmp(current_command->name, "list") == 0))
447		show_properties = B_TRUE;
448
449	if (show_properties) {
450		(void) fprintf(fp,
451		    gettext("\nThe following properties are supported:\n"));
452
453		(void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
454		    "PROPERTY", "EDIT", "INHERIT", "VALUES");
455
456		/* Iterate over all properties */
457		(void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
458		    ZFS_TYPE_DATASET);
459
460		(void) fprintf(fp, "\t%-15s ", "userused@...");
461		(void) fprintf(fp, " NO       NO   <size>\n");
462		(void) fprintf(fp, "\t%-15s ", "groupused@...");
463		(void) fprintf(fp, " NO       NO   <size>\n");
464		(void) fprintf(fp, "\t%-15s ", "userquota@...");
465		(void) fprintf(fp, "YES       NO   <size> | none\n");
466		(void) fprintf(fp, "\t%-15s ", "groupquota@...");
467		(void) fprintf(fp, "YES       NO   <size> | none\n");
468		(void) fprintf(fp, "\t%-15s ", "written@<snap>");
469		(void) fprintf(fp, " NO       NO   <size>\n");
470
471		(void) fprintf(fp, gettext("\nSizes are specified in bytes "
472		    "with standard units such as K, M, G, etc.\n"));
473		(void) fprintf(fp, gettext("\nUser-defined properties can "
474		    "be specified by using a name containing a colon (:).\n"));
475		(void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
476		    "properties must be appended with\n"
477		    "a user or group specifier of one of these forms:\n"
478		    "    POSIX name      (eg: \"matt\")\n"
479		    "    POSIX id        (eg: \"126829\")\n"
480		    "    SMB name@domain (eg: \"matt@sun\")\n"
481		    "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
482	} else {
483		(void) fprintf(fp,
484		    gettext("\nFor the property list, run: %s\n"),
485		    "zfs set|get");
486		(void) fprintf(fp,
487		    gettext("\nFor the delegated permission list, run: %s\n"),
488		    "zfs allow|unallow");
489	}
490
491	/*
492	 * See comments at end of main().
493	 */
494	if (getenv("ZFS_ABORT") != NULL) {
495		(void) printf("dumping core by request\n");
496		abort();
497	}
498
499	exit(requested ? 0 : 2);
500}
501
502/*
503 * Take a property=value argument string and add it to the given nvlist.
504 * Modifies the argument inplace.
505 */
506static int
507parseprop(nvlist_t *props, char *propname)
508{
509	char *propval, *strval;
510
511	if ((propval = strchr(propname, '=')) == NULL) {
512		(void) fprintf(stderr, gettext("missing "
513		    "'=' for property=value argument\n"));
514		return (-1);
515	}
516	*propval = '\0';
517	propval++;
518	if (nvlist_lookup_string(props, propname, &strval) == 0) {
519		(void) fprintf(stderr, gettext("property '%s' "
520		    "specified multiple times\n"), propname);
521		return (-1);
522	}
523	if (nvlist_add_string(props, propname, propval) != 0)
524		nomem();
525	return (0);
526}
527
528static int
529parse_depth(char *opt, int *flags)
530{
531	char *tmp;
532	int depth;
533
534	depth = (int)strtol(opt, &tmp, 0);
535	if (*tmp) {
536		(void) fprintf(stderr,
537		    gettext("%s is not an integer\n"), opt);
538		usage(B_FALSE);
539	}
540	if (depth < 0) {
541		(void) fprintf(stderr,
542		    gettext("Depth can not be negative.\n"));
543		usage(B_FALSE);
544	}
545	*flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
546	return (depth);
547}
548
549#define	PROGRESS_DELAY 2		/* seconds */
550
551static 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";
552static time_t pt_begin;
553static char *pt_header = NULL;
554static boolean_t pt_shown;
555
556static void
557start_progress_timer(void)
558{
559	pt_begin = time(NULL) + PROGRESS_DELAY;
560	pt_shown = B_FALSE;
561}
562
563static void
564set_progress_header(char *header)
565{
566	assert(pt_header == NULL);
567	pt_header = safe_strdup(header);
568	if (pt_shown) {
569		(void) printf("%s: ", header);
570		(void) fflush(stdout);
571	}
572}
573
574static void
575update_progress(char *update)
576{
577	if (!pt_shown && time(NULL) > pt_begin) {
578		int len = strlen(update);
579
580		(void) printf("%s: %s%*.*s", pt_header, update, len, len,
581		    pt_reverse);
582		(void) fflush(stdout);
583		pt_shown = B_TRUE;
584	} else if (pt_shown) {
585		int len = strlen(update);
586
587		(void) printf("%s%*.*s", update, len, len, pt_reverse);
588		(void) fflush(stdout);
589	}
590}
591
592static void
593finish_progress(char *done)
594{
595	if (pt_shown) {
596		(void) printf("%s\n", done);
597		(void) fflush(stdout);
598	}
599	free(pt_header);
600	pt_header = NULL;
601}
602
603/*
604 * Check if the dataset is mountable and should be automatically mounted.
605 */
606static boolean_t
607should_auto_mount(zfs_handle_t *zhp)
608{
609	if (!zfs_prop_valid_for_type(ZFS_PROP_CANMOUNT, zfs_get_type(zhp)))
610		return (B_FALSE);
611	return (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_ON);
612}
613
614/*
615 * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
616 *
617 * Given an existing dataset, create a writable copy whose initial contents
618 * are the same as the source.  The newly created dataset maintains a
619 * dependency on the original; the original cannot be destroyed so long as
620 * the clone exists.
621 *
622 * The '-p' flag creates all the non-existing ancestors of the target first.
623 */
624static int
625zfs_do_clone(int argc, char **argv)
626{
627	zfs_handle_t *zhp = NULL;
628	boolean_t parents = B_FALSE;
629	nvlist_t *props;
630	int ret = 0;
631	int c;
632
633	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
634		nomem();
635
636	/* check options */
637	while ((c = getopt(argc, argv, "o:p")) != -1) {
638		switch (c) {
639		case 'o':
640			if (parseprop(props, optarg) != 0)
641				return (1);
642			break;
643		case 'p':
644			parents = B_TRUE;
645			break;
646		case '?':
647			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
648			    optopt);
649			goto usage;
650		}
651	}
652
653	argc -= optind;
654	argv += optind;
655
656	/* check number of arguments */
657	if (argc < 1) {
658		(void) fprintf(stderr, gettext("missing source dataset "
659		    "argument\n"));
660		goto usage;
661	}
662	if (argc < 2) {
663		(void) fprintf(stderr, gettext("missing target dataset "
664		    "argument\n"));
665		goto usage;
666	}
667	if (argc > 2) {
668		(void) fprintf(stderr, gettext("too many arguments\n"));
669		goto usage;
670	}
671
672	/* open the source dataset */
673	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
674		return (1);
675
676	if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
677	    ZFS_TYPE_VOLUME)) {
678		/*
679		 * Now create the ancestors of the target dataset.  If the
680		 * target already exists and '-p' option was used we should not
681		 * complain.
682		 */
683		if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
684		    ZFS_TYPE_VOLUME))
685			return (0);
686		if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
687			return (1);
688	}
689
690	/* pass to libzfs */
691	ret = zfs_clone(zhp, argv[1], props);
692
693	/* create the mountpoint if necessary */
694	if (ret == 0) {
695		zfs_handle_t *clone;
696
697		clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
698		if (clone != NULL) {
699			/*
700			 * If the user doesn't want the dataset
701			 * automatically mounted, then skip the mount/share
702			 * step.
703			 */
704			if (should_auto_mount(clone)) {
705				if ((ret = zfs_mount(clone, NULL, 0)) != 0) {
706					(void) fprintf(stderr, gettext("clone "
707					    "successfully created, "
708					    "but not mounted\n"));
709				} else if ((ret = zfs_share(clone)) != 0) {
710					(void) fprintf(stderr, gettext("clone "
711					    "successfully created, "
712					    "but not shared\n"));
713				}
714			}
715			zfs_close(clone);
716		}
717	}
718
719	zfs_close(zhp);
720	nvlist_free(props);
721
722	return (!!ret);
723
724usage:
725	if (zhp)
726		zfs_close(zhp);
727	nvlist_free(props);
728	usage(B_FALSE);
729	return (-1);
730}
731
732/*
733 * zfs create [-pu] [-o prop=value] ... fs
734 * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
735 *
736 * Create a new dataset.  This command can be used to create filesystems
737 * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
738 * For volumes, the user must specify a size to be used.
739 *
740 * The '-s' flag applies only to volumes, and indicates that we should not try
741 * to set the reservation for this volume.  By default we set a reservation
742 * equal to the size for any volume.  For pools with SPA_VERSION >=
743 * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
744 *
745 * The '-p' flag creates all the non-existing ancestors of the target first.
746 *
747 * The '-u' flag prevents mounting of newly created file system.
748 */
749static int
750zfs_do_create(int argc, char **argv)
751{
752	zfs_type_t type = ZFS_TYPE_FILESYSTEM;
753	zfs_handle_t *zhp = NULL;
754	uint64_t volsize = 0;
755	int c;
756	boolean_t noreserve = B_FALSE;
757	boolean_t bflag = B_FALSE;
758	boolean_t parents = B_FALSE;
759	boolean_t nomount = B_FALSE;
760	int ret = 1;
761	nvlist_t *props;
762	uint64_t intval;
763
764	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
765		nomem();
766
767	/* check options */
768	while ((c = getopt(argc, argv, ":V:b:so:pu")) != -1) {
769		switch (c) {
770		case 'V':
771			type = ZFS_TYPE_VOLUME;
772			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
773				(void) fprintf(stderr, gettext("bad volume "
774				    "size '%s': %s\n"), optarg,
775				    libzfs_error_description(g_zfs));
776				goto error;
777			}
778
779			if (nvlist_add_uint64(props,
780			    zfs_prop_to_name(ZFS_PROP_VOLSIZE), intval) != 0)
781				nomem();
782			volsize = intval;
783			break;
784		case 'p':
785			parents = B_TRUE;
786			break;
787		case 'b':
788			bflag = B_TRUE;
789			if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
790				(void) fprintf(stderr, gettext("bad volume "
791				    "block size '%s': %s\n"), optarg,
792				    libzfs_error_description(g_zfs));
793				goto error;
794			}
795
796			if (nvlist_add_uint64(props,
797			    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
798			    intval) != 0)
799				nomem();
800			break;
801		case 'o':
802			if (parseprop(props, optarg) != 0)
803				goto error;
804			break;
805		case 's':
806			noreserve = B_TRUE;
807			break;
808		case 'u':
809			nomount = B_TRUE;
810			break;
811		case ':':
812			(void) fprintf(stderr, gettext("missing size "
813			    "argument\n"));
814			goto badusage;
815		case '?':
816			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
817			    optopt);
818			goto badusage;
819		}
820	}
821
822	if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
823		(void) fprintf(stderr, gettext("'-s' and '-b' can only be "
824		    "used when creating a volume\n"));
825		goto badusage;
826	}
827	if (nomount && type != ZFS_TYPE_FILESYSTEM) {
828		(void) fprintf(stderr, gettext("'-u' can only be "
829		    "used when creating a file system\n"));
830		goto badusage;
831	}
832
833	argc -= optind;
834	argv += optind;
835
836	/* check number of arguments */
837	if (argc == 0) {
838		(void) fprintf(stderr, gettext("missing %s argument\n"),
839		    zfs_type_to_name(type));
840		goto badusage;
841	}
842	if (argc > 1) {
843		(void) fprintf(stderr, gettext("too many arguments\n"));
844		goto badusage;
845	}
846
847	if (type == ZFS_TYPE_VOLUME && !noreserve) {
848		zpool_handle_t *zpool_handle;
849		nvlist_t *real_props = NULL;
850		uint64_t spa_version;
851		char *p;
852		zfs_prop_t resv_prop;
853		char *strval;
854		char msg[1024];
855
856		if ((p = strchr(argv[0], '/')) != NULL)
857			*p = '\0';
858		zpool_handle = zpool_open(g_zfs, argv[0]);
859		if (p != NULL)
860			*p = '/';
861		if (zpool_handle == NULL)
862			goto error;
863		spa_version = zpool_get_prop_int(zpool_handle,
864		    ZPOOL_PROP_VERSION, NULL);
865		if (spa_version >= SPA_VERSION_REFRESERVATION)
866			resv_prop = ZFS_PROP_REFRESERVATION;
867		else
868			resv_prop = ZFS_PROP_RESERVATION;
869
870		(void) snprintf(msg, sizeof (msg),
871		    gettext("cannot create '%s'"), argv[0]);
872		if (props && (real_props = zfs_valid_proplist(g_zfs, type,
873		    props, 0, NULL, zpool_handle, msg)) == NULL) {
874			zpool_close(zpool_handle);
875			goto error;
876		}
877		zpool_close(zpool_handle);
878
879		volsize = zvol_volsize_to_reservation(volsize, real_props);
880		nvlist_free(real_props);
881
882		if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
883		    &strval) != 0) {
884			if (nvlist_add_uint64(props,
885			    zfs_prop_to_name(resv_prop), volsize) != 0) {
886				nvlist_free(props);
887				nomem();
888			}
889		}
890	}
891
892	if (parents && zfs_name_valid(argv[0], type)) {
893		/*
894		 * Now create the ancestors of target dataset.  If the target
895		 * already exists and '-p' option was used we should not
896		 * complain.
897		 */
898		if (zfs_dataset_exists(g_zfs, argv[0], type)) {
899			ret = 0;
900			goto error;
901		}
902		if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
903			goto error;
904	}
905
906	/* pass to libzfs */
907	if (zfs_create(g_zfs, argv[0], type, props) != 0)
908		goto error;
909
910	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
911		goto error;
912
913	ret = 0;
914
915	/*
916	 * Mount and/or share the new filesystem as appropriate.  We provide a
917	 * verbose error message to let the user know that their filesystem was
918	 * in fact created, even if we failed to mount or share it.
919	 * If the user doesn't want the dataset automatically mounted,
920	 * then skip the mount/share step altogether.
921	 */
922	if (!nomount && should_auto_mount(zhp)) {
923		if (zfs_mount(zhp, NULL, 0) != 0) {
924			(void) fprintf(stderr, gettext("filesystem "
925			    "successfully created, but not mounted\n"));
926			ret = 1;
927		} else if (zfs_share(zhp) != 0) {
928			(void) fprintf(stderr, gettext("filesystem "
929			    "successfully created, but not shared\n"));
930			ret = 1;
931		}
932	}
933
934error:
935	if (zhp)
936		zfs_close(zhp);
937	nvlist_free(props);
938	return (ret);
939badusage:
940	nvlist_free(props);
941	usage(B_FALSE);
942	return (2);
943}
944
945/*
946 * zfs destroy [-rRf] <fs, vol>
947 * zfs destroy [-rRd] <snap>
948 *
949 *	-r	Recursively destroy all children
950 *	-R	Recursively destroy all dependents, including clones
951 *	-f	Force unmounting of any dependents
952 *	-d	If we can't destroy now, mark for deferred destruction
953 *
954 * Destroys the given dataset.  By default, it will unmount any filesystems,
955 * and refuse to destroy a dataset that has any dependents.  A dependent can
956 * either be a child, or a clone of a child.
957 */
958typedef struct destroy_cbdata {
959	boolean_t	cb_first;
960	boolean_t	cb_force;
961	boolean_t	cb_recurse;
962	boolean_t	cb_error;
963	boolean_t	cb_doclones;
964	zfs_handle_t	*cb_target;
965	boolean_t	cb_defer_destroy;
966	boolean_t	cb_verbose;
967	boolean_t	cb_parsable;
968	boolean_t	cb_dryrun;
969	nvlist_t	*cb_nvl;
970	nvlist_t	*cb_batchedsnaps;
971
972	/* first snap in contiguous run */
973	char		*cb_firstsnap;
974	/* previous snap in contiguous run */
975	char		*cb_prevsnap;
976	int64_t		cb_snapused;
977	char		*cb_snapspec;
978	char		*cb_bookmark;
979} destroy_cbdata_t;
980
981/*
982 * Check for any dependents based on the '-r' or '-R' flags.
983 */
984static int
985destroy_check_dependent(zfs_handle_t *zhp, void *data)
986{
987	destroy_cbdata_t *cbp = data;
988	const char *tname = zfs_get_name(cbp->cb_target);
989	const char *name = zfs_get_name(zhp);
990
991	if (strncmp(tname, name, strlen(tname)) == 0 &&
992	    (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
993		/*
994		 * This is a direct descendant, not a clone somewhere else in
995		 * the hierarchy.
996		 */
997		if (cbp->cb_recurse)
998			goto out;
999
1000		if (cbp->cb_first) {
1001			(void) fprintf(stderr, gettext("cannot destroy '%s': "
1002			    "%s has children\n"),
1003			    zfs_get_name(cbp->cb_target),
1004			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
1005			(void) fprintf(stderr, gettext("use '-r' to destroy "
1006			    "the following datasets:\n"));
1007			cbp->cb_first = B_FALSE;
1008			cbp->cb_error = B_TRUE;
1009		}
1010
1011		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
1012	} else {
1013		/*
1014		 * This is a clone.  We only want to report this if the '-r'
1015		 * wasn't specified, or the target is a snapshot.
1016		 */
1017		if (!cbp->cb_recurse &&
1018		    zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
1019			goto out;
1020
1021		if (cbp->cb_first) {
1022			(void) fprintf(stderr, gettext("cannot destroy '%s': "
1023			    "%s has dependent clones\n"),
1024			    zfs_get_name(cbp->cb_target),
1025			    zfs_type_to_name(zfs_get_type(cbp->cb_target)));
1026			(void) fprintf(stderr, gettext("use '-R' to destroy "
1027			    "the following datasets:\n"));
1028			cbp->cb_first = B_FALSE;
1029			cbp->cb_error = B_TRUE;
1030			cbp->cb_dryrun = B_TRUE;
1031		}
1032
1033		(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
1034	}
1035
1036out:
1037	zfs_close(zhp);
1038	return (0);
1039}
1040
1041static int
1042destroy_callback(zfs_handle_t *zhp, void *data)
1043{
1044	destroy_cbdata_t *cb = data;
1045	const char *name = zfs_get_name(zhp);
1046
1047	if (cb->cb_verbose) {
1048		if (cb->cb_parsable) {
1049			(void) printf("destroy\t%s\n", name);
1050		} else if (cb->cb_dryrun) {
1051			(void) printf(gettext("would destroy %s\n"),
1052			    name);
1053		} else {
1054			(void) printf(gettext("will destroy %s\n"),
1055			    name);
1056		}
1057	}
1058
1059	/*
1060	 * Ignore pools (which we've already flagged as an error before getting
1061	 * here).
1062	 */
1063	if (strchr(zfs_get_name(zhp), '/') == NULL &&
1064	    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1065		zfs_close(zhp);
1066		return (0);
1067	}
1068	if (cb->cb_dryrun) {
1069		zfs_close(zhp);
1070		return (0);
1071	}
1072
1073	/*
1074	 * We batch up all contiguous snapshots (even of different
1075	 * filesystems) and destroy them with one ioctl.  We can't
1076	 * simply do all snap deletions and then all fs deletions,
1077	 * because we must delete a clone before its origin.
1078	 */
1079	if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT) {
1080		fnvlist_add_boolean(cb->cb_batchedsnaps, name);
1081	} else {
1082		int error = zfs_destroy_snaps_nvl(g_zfs,
1083		    cb->cb_batchedsnaps, B_FALSE);
1084		fnvlist_free(cb->cb_batchedsnaps);
1085		cb->cb_batchedsnaps = fnvlist_alloc();
1086
1087		if (error != 0 ||
1088		    zfs_unmount(zhp, NULL, cb->cb_force ? MS_FORCE : 0) != 0 ||
1089		    zfs_destroy(zhp, cb->cb_defer_destroy) != 0) {
1090			zfs_close(zhp);
1091			return (-1);
1092		}
1093	}
1094
1095	zfs_close(zhp);
1096	return (0);
1097}
1098
1099static int
1100destroy_print_cb(zfs_handle_t *zhp, void *arg)
1101{
1102	destroy_cbdata_t *cb = arg;
1103	const char *name = zfs_get_name(zhp);
1104	int err = 0;
1105
1106	if (nvlist_exists(cb->cb_nvl, name)) {
1107		if (cb->cb_firstsnap == NULL)
1108			cb->cb_firstsnap = strdup(name);
1109		if (cb->cb_prevsnap != NULL)
1110			free(cb->cb_prevsnap);
1111		/* this snap continues the current range */
1112		cb->cb_prevsnap = strdup(name);
1113		if (cb->cb_firstsnap == NULL || cb->cb_prevsnap == NULL)
1114			nomem();
1115		if (cb->cb_verbose) {
1116			if (cb->cb_parsable) {
1117				(void) printf("destroy\t%s\n", name);
1118			} else if (cb->cb_dryrun) {
1119				(void) printf(gettext("would destroy %s\n"),
1120				    name);
1121			} else {
1122				(void) printf(gettext("will destroy %s\n"),
1123				    name);
1124			}
1125		}
1126	} else if (cb->cb_firstsnap != NULL) {
1127		/* end of this range */
1128		uint64_t used = 0;
1129		err = lzc_snaprange_space(cb->cb_firstsnap,
1130		    cb->cb_prevsnap, &used);
1131		cb->cb_snapused += used;
1132		free(cb->cb_firstsnap);
1133		cb->cb_firstsnap = NULL;
1134		free(cb->cb_prevsnap);
1135		cb->cb_prevsnap = NULL;
1136	}
1137	zfs_close(zhp);
1138	return (err);
1139}
1140
1141static int
1142destroy_print_snapshots(zfs_handle_t *fs_zhp, destroy_cbdata_t *cb)
1143{
1144	int err = 0;
1145	assert(cb->cb_firstsnap == NULL);
1146	assert(cb->cb_prevsnap == NULL);
1147	err = zfs_iter_snapshots_sorted(fs_zhp, destroy_print_cb, cb);
1148	if (cb->cb_firstsnap != NULL) {
1149		uint64_t used = 0;
1150		if (err == 0) {
1151			err = lzc_snaprange_space(cb->cb_firstsnap,
1152			    cb->cb_prevsnap, &used);
1153		}
1154		cb->cb_snapused += used;
1155		free(cb->cb_firstsnap);
1156		cb->cb_firstsnap = NULL;
1157		free(cb->cb_prevsnap);
1158		cb->cb_prevsnap = NULL;
1159	}
1160	return (err);
1161}
1162
1163static int
1164snapshot_to_nvl_cb(zfs_handle_t *zhp, void *arg)
1165{
1166	destroy_cbdata_t *cb = arg;
1167	int err = 0;
1168
1169	/* Check for clones. */
1170	if (!cb->cb_doclones && !cb->cb_defer_destroy) {
1171		cb->cb_target = zhp;
1172		cb->cb_first = B_TRUE;
1173		err = zfs_iter_dependents(zhp, B_TRUE,
1174		    destroy_check_dependent, cb);
1175	}
1176
1177	if (err == 0) {
1178		if (nvlist_add_boolean(cb->cb_nvl, zfs_get_name(zhp)))
1179			nomem();
1180	}
1181	zfs_close(zhp);
1182	return (err);
1183}
1184
1185static int
1186gather_snapshots(zfs_handle_t *zhp, void *arg)
1187{
1188	destroy_cbdata_t *cb = arg;
1189	int err = 0;
1190
1191	err = zfs_iter_snapspec(zhp, cb->cb_snapspec, snapshot_to_nvl_cb, cb);
1192	if (err == ENOENT)
1193		err = 0;
1194	if (err != 0)
1195		goto out;
1196
1197	if (cb->cb_verbose) {
1198		err = destroy_print_snapshots(zhp, cb);
1199		if (err != 0)
1200			goto out;
1201	}
1202
1203	if (cb->cb_recurse)
1204		err = zfs_iter_filesystems(zhp, gather_snapshots, cb);
1205
1206out:
1207	zfs_close(zhp);
1208	return (err);
1209}
1210
1211static int
1212destroy_clones(destroy_cbdata_t *cb)
1213{
1214	nvpair_t *pair;
1215	for (pair = nvlist_next_nvpair(cb->cb_nvl, NULL);
1216	    pair != NULL;
1217	    pair = nvlist_next_nvpair(cb->cb_nvl, pair)) {
1218		zfs_handle_t *zhp = zfs_open(g_zfs, nvpair_name(pair),
1219		    ZFS_TYPE_SNAPSHOT);
1220		if (zhp != NULL) {
1221			boolean_t defer = cb->cb_defer_destroy;
1222			int err = 0;
1223
1224			/*
1225			 * We can't defer destroy non-snapshots, so set it to
1226			 * false while destroying the clones.
1227			 */
1228			cb->cb_defer_destroy = B_FALSE;
1229			err = zfs_iter_dependents(zhp, B_FALSE,
1230			    destroy_callback, cb);
1231			cb->cb_defer_destroy = defer;
1232			zfs_close(zhp);
1233			if (err != 0)
1234				return (err);
1235		}
1236	}
1237	return (0);
1238}
1239
1240static int
1241zfs_do_destroy(int argc, char **argv)
1242{
1243	destroy_cbdata_t cb = { 0 };
1244	int rv = 0;
1245	int err = 0;
1246	int c;
1247	zfs_handle_t *zhp = NULL;
1248	char *at, *pound;
1249	zfs_type_t type = ZFS_TYPE_DATASET;
1250
1251	/* check options */
1252	while ((c = getopt(argc, argv, "vpndfrR")) != -1) {
1253		switch (c) {
1254		case 'v':
1255			cb.cb_verbose = B_TRUE;
1256			break;
1257		case 'p':
1258			cb.cb_verbose = B_TRUE;
1259			cb.cb_parsable = B_TRUE;
1260			break;
1261		case 'n':
1262			cb.cb_dryrun = B_TRUE;
1263			break;
1264		case 'd':
1265			cb.cb_defer_destroy = B_TRUE;
1266			type = ZFS_TYPE_SNAPSHOT;
1267			break;
1268		case 'f':
1269			cb.cb_force = B_TRUE;
1270			break;
1271		case 'r':
1272			cb.cb_recurse = B_TRUE;
1273			break;
1274		case 'R':
1275			cb.cb_recurse = B_TRUE;
1276			cb.cb_doclones = B_TRUE;
1277			break;
1278		case '?':
1279		default:
1280			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1281			    optopt);
1282			usage(B_FALSE);
1283		}
1284	}
1285
1286	argc -= optind;
1287	argv += optind;
1288
1289	/* check number of arguments */
1290	if (argc == 0) {
1291		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1292		usage(B_FALSE);
1293	}
1294	if (argc > 1) {
1295		(void) fprintf(stderr, gettext("too many arguments\n"));
1296		usage(B_FALSE);
1297	}
1298
1299	at = strchr(argv[0], '@');
1300	pound = strchr(argv[0], '#');
1301	if (at != NULL) {
1302
1303		/* Build the list of snaps to destroy in cb_nvl. */
1304		cb.cb_nvl = fnvlist_alloc();
1305
1306		*at = '\0';
1307		zhp = zfs_open(g_zfs, argv[0],
1308		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1309		if (zhp == NULL)
1310			return (1);
1311
1312		cb.cb_snapspec = at + 1;
1313		if (gather_snapshots(zfs_handle_dup(zhp), &cb) != 0 ||
1314		    cb.cb_error) {
1315			rv = 1;
1316			goto out;
1317		}
1318
1319		if (nvlist_empty(cb.cb_nvl)) {
1320			(void) fprintf(stderr, gettext("could not find any "
1321			    "snapshots to destroy; check snapshot names.\n"));
1322			rv = 1;
1323			goto out;
1324		}
1325
1326		if (cb.cb_verbose) {
1327			char buf[16];
1328			zfs_nicenum(cb.cb_snapused, buf, sizeof (buf));
1329			if (cb.cb_parsable) {
1330				(void) printf("reclaim\t%llu\n",
1331				    cb.cb_snapused);
1332			} else if (cb.cb_dryrun) {
1333				(void) printf(gettext("would reclaim %s\n"),
1334				    buf);
1335			} else {
1336				(void) printf(gettext("will reclaim %s\n"),
1337				    buf);
1338			}
1339		}
1340
1341		if (!cb.cb_dryrun) {
1342			if (cb.cb_doclones) {
1343				cb.cb_batchedsnaps = fnvlist_alloc();
1344				err = destroy_clones(&cb);
1345				if (err == 0) {
1346					err = zfs_destroy_snaps_nvl(g_zfs,
1347					    cb.cb_batchedsnaps, B_FALSE);
1348				}
1349				if (err != 0) {
1350					rv = 1;
1351					goto out;
1352				}
1353			}
1354			if (err == 0) {
1355				err = zfs_destroy_snaps_nvl(g_zfs, cb.cb_nvl,
1356				    cb.cb_defer_destroy);
1357			}
1358		}
1359
1360		if (err != 0)
1361			rv = 1;
1362	} else if (pound != NULL) {
1363		int err;
1364		nvlist_t *nvl;
1365
1366		if (cb.cb_dryrun) {
1367			(void) fprintf(stderr,
1368			    "dryrun is not supported with bookmark\n");
1369			return (-1);
1370		}
1371
1372		if (cb.cb_defer_destroy) {
1373			(void) fprintf(stderr,
1374			    "defer destroy is not supported with bookmark\n");
1375			return (-1);
1376		}
1377
1378		if (cb.cb_recurse) {
1379			(void) fprintf(stderr,
1380			    "recursive is not supported with bookmark\n");
1381			return (-1);
1382		}
1383
1384		if (!zfs_bookmark_exists(argv[0])) {
1385			(void) fprintf(stderr, gettext("bookmark '%s' "
1386			    "does not exist.\n"), argv[0]);
1387			return (1);
1388		}
1389
1390		nvl = fnvlist_alloc();
1391		fnvlist_add_boolean(nvl, argv[0]);
1392
1393		err = lzc_destroy_bookmarks(nvl, NULL);
1394		if (err != 0) {
1395			(void) zfs_standard_error(g_zfs, err,
1396			    "cannot destroy bookmark");
1397		}
1398
1399		nvlist_free(cb.cb_nvl);
1400
1401		return (err);
1402	} else {
1403		/* Open the given dataset */
1404		if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1405			return (1);
1406
1407		cb.cb_target = zhp;
1408
1409		/*
1410		 * Perform an explicit check for pools before going any further.
1411		 */
1412		if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1413		    zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1414			(void) fprintf(stderr, gettext("cannot destroy '%s': "
1415			    "operation does not apply to pools\n"),
1416			    zfs_get_name(zhp));
1417			(void) fprintf(stderr, gettext("use 'zfs destroy -r "
1418			    "%s' to destroy all datasets in the pool\n"),
1419			    zfs_get_name(zhp));
1420			(void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1421			    "to destroy the pool itself\n"), zfs_get_name(zhp));
1422			rv = 1;
1423			goto out;
1424		}
1425
1426		/*
1427		 * Check for any dependents and/or clones.
1428		 */
1429		cb.cb_first = B_TRUE;
1430		if (!cb.cb_doclones &&
1431		    zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1432		    &cb) != 0) {
1433			rv = 1;
1434			goto out;
1435		}
1436
1437		if (cb.cb_error) {
1438			rv = 1;
1439			goto out;
1440		}
1441
1442		cb.cb_batchedsnaps = fnvlist_alloc();
1443		if (zfs_iter_dependents(zhp, B_FALSE, destroy_callback,
1444		    &cb) != 0) {
1445			rv = 1;
1446			goto out;
1447		}
1448
1449		/*
1450		 * Do the real thing.  The callback will close the
1451		 * handle regardless of whether it succeeds or not.
1452		 */
1453		err = destroy_callback(zhp, &cb);
1454		zhp = NULL;
1455		if (err == 0) {
1456			err = zfs_destroy_snaps_nvl(g_zfs,
1457			    cb.cb_batchedsnaps, cb.cb_defer_destroy);
1458		}
1459		if (err != 0)
1460			rv = 1;
1461	}
1462
1463out:
1464	fnvlist_free(cb.cb_batchedsnaps);
1465	fnvlist_free(cb.cb_nvl);
1466	if (zhp != NULL)
1467		zfs_close(zhp);
1468	return (rv);
1469}
1470
1471static boolean_t
1472is_recvd_column(zprop_get_cbdata_t *cbp)
1473{
1474	int i;
1475	zfs_get_column_t col;
1476
1477	for (i = 0; i < ZFS_GET_NCOLS &&
1478	    (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1479		if (col == GET_COL_RECVD)
1480			return (B_TRUE);
1481	return (B_FALSE);
1482}
1483
1484/*
1485 * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1486 *	< all | property[,property]... > < fs | snap | vol > ...
1487 *
1488 *	-r	recurse over any child datasets
1489 *	-H	scripted mode.  Headers are stripped, and fields are separated
1490 *		by tabs instead of spaces.
1491 *	-o	Set of fields to display.  One of "name,property,value,
1492 *		received,source". Default is "name,property,value,source".
1493 *		"all" is an alias for all five.
1494 *	-s	Set of sources to allow.  One of
1495 *		"local,default,inherited,received,temporary,none".  Default is
1496 *		all six.
1497 *	-p	Display values in parsable (literal) format.
1498 *
1499 *  Prints properties for the given datasets.  The user can control which
1500 *  columns to display as well as which property types to allow.
1501 */
1502
1503/*
1504 * Invoked to display the properties for a single dataset.
1505 */
1506static int
1507get_callback(zfs_handle_t *zhp, void *data)
1508{
1509	char buf[ZFS_MAXPROPLEN];
1510	char rbuf[ZFS_MAXPROPLEN];
1511	zprop_source_t sourcetype;
1512	char source[ZFS_MAXNAMELEN];
1513	zprop_get_cbdata_t *cbp = data;
1514	nvlist_t *user_props = zfs_get_user_props(zhp);
1515	zprop_list_t *pl = cbp->cb_proplist;
1516	nvlist_t *propval;
1517	char *strval;
1518	char *sourceval;
1519	boolean_t received = is_recvd_column(cbp);
1520
1521	for (; pl != NULL; pl = pl->pl_next) {
1522		char *recvdval = NULL;
1523		/*
1524		 * Skip the special fake placeholder.  This will also skip over
1525		 * the name property when 'all' is specified.
1526		 */
1527		if (pl->pl_prop == ZFS_PROP_NAME &&
1528		    pl == cbp->cb_proplist)
1529			continue;
1530
1531		if (pl->pl_prop != ZPROP_INVAL) {
1532			if (zfs_prop_get(zhp, pl->pl_prop, buf,
1533			    sizeof (buf), &sourcetype, source,
1534			    sizeof (source),
1535			    cbp->cb_literal) != 0) {
1536				if (pl->pl_all)
1537					continue;
1538				if (!zfs_prop_valid_for_type(pl->pl_prop,
1539				    ZFS_TYPE_DATASET)) {
1540					(void) fprintf(stderr,
1541					    gettext("No such property '%s'\n"),
1542					    zfs_prop_to_name(pl->pl_prop));
1543					continue;
1544				}
1545				sourcetype = ZPROP_SRC_NONE;
1546				(void) strlcpy(buf, "-", sizeof (buf));
1547			}
1548
1549			if (received && (zfs_prop_get_recvd(zhp,
1550			    zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1551			    cbp->cb_literal) == 0))
1552				recvdval = rbuf;
1553
1554			zprop_print_one_property(zfs_get_name(zhp), cbp,
1555			    zfs_prop_to_name(pl->pl_prop),
1556			    buf, sourcetype, source, recvdval);
1557		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
1558			sourcetype = ZPROP_SRC_LOCAL;
1559
1560			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1561			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1562				sourcetype = ZPROP_SRC_NONE;
1563				(void) strlcpy(buf, "-", sizeof (buf));
1564			}
1565
1566			zprop_print_one_property(zfs_get_name(zhp), cbp,
1567			    pl->pl_user_prop, buf, sourcetype, source, NULL);
1568		} else if (zfs_prop_written(pl->pl_user_prop)) {
1569			sourcetype = ZPROP_SRC_LOCAL;
1570
1571			if (zfs_prop_get_written(zhp, pl->pl_user_prop,
1572			    buf, sizeof (buf), cbp->cb_literal) != 0) {
1573				sourcetype = ZPROP_SRC_NONE;
1574				(void) strlcpy(buf, "-", sizeof (buf));
1575			}
1576
1577			zprop_print_one_property(zfs_get_name(zhp), cbp,
1578			    pl->pl_user_prop, buf, sourcetype, source, NULL);
1579		} else {
1580			if (nvlist_lookup_nvlist(user_props,
1581			    pl->pl_user_prop, &propval) != 0) {
1582				if (pl->pl_all)
1583					continue;
1584				sourcetype = ZPROP_SRC_NONE;
1585				strval = "-";
1586			} else {
1587				verify(nvlist_lookup_string(propval,
1588				    ZPROP_VALUE, &strval) == 0);
1589				verify(nvlist_lookup_string(propval,
1590				    ZPROP_SOURCE, &sourceval) == 0);
1591
1592				if (strcmp(sourceval,
1593				    zfs_get_name(zhp)) == 0) {
1594					sourcetype = ZPROP_SRC_LOCAL;
1595				} else if (strcmp(sourceval,
1596				    ZPROP_SOURCE_VAL_RECVD) == 0) {
1597					sourcetype = ZPROP_SRC_RECEIVED;
1598				} else {
1599					sourcetype = ZPROP_SRC_INHERITED;
1600					(void) strlcpy(source,
1601					    sourceval, sizeof (source));
1602				}
1603			}
1604
1605			if (received && (zfs_prop_get_recvd(zhp,
1606			    pl->pl_user_prop, rbuf, sizeof (rbuf),
1607			    cbp->cb_literal) == 0))
1608				recvdval = rbuf;
1609
1610			zprop_print_one_property(zfs_get_name(zhp), cbp,
1611			    pl->pl_user_prop, strval, sourcetype,
1612			    source, recvdval);
1613		}
1614	}
1615
1616	return (0);
1617}
1618
1619static int
1620zfs_do_get(int argc, char **argv)
1621{
1622	zprop_get_cbdata_t cb = { 0 };
1623	int i, c, flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1624	int types = ZFS_TYPE_DATASET;
1625	char *value, *fields;
1626	int ret = 0;
1627	int limit = 0;
1628	zprop_list_t fake_name = { 0 };
1629
1630	/*
1631	 * Set up default columns and sources.
1632	 */
1633	cb.cb_sources = ZPROP_SRC_ALL;
1634	cb.cb_columns[0] = GET_COL_NAME;
1635	cb.cb_columns[1] = GET_COL_PROPERTY;
1636	cb.cb_columns[2] = GET_COL_VALUE;
1637	cb.cb_columns[3] = GET_COL_SOURCE;
1638	cb.cb_type = ZFS_TYPE_DATASET;
1639
1640	/* check options */
1641	while ((c = getopt(argc, argv, ":d:o:s:rt:Hp")) != -1) {
1642		switch (c) {
1643		case 'p':
1644			cb.cb_literal = B_TRUE;
1645			break;
1646		case 'd':
1647			limit = parse_depth(optarg, &flags);
1648			break;
1649		case 'r':
1650			flags |= ZFS_ITER_RECURSE;
1651			break;
1652		case 'H':
1653			cb.cb_scripted = B_TRUE;
1654			break;
1655		case ':':
1656			(void) fprintf(stderr, gettext("missing argument for "
1657			    "'%c' option\n"), optopt);
1658			usage(B_FALSE);
1659			break;
1660		case 'o':
1661			/*
1662			 * Process the set of columns to display.  We zero out
1663			 * the structure to give us a blank slate.
1664			 */
1665			bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1666			i = 0;
1667			while (*optarg != '\0') {
1668				static char *col_subopts[] =
1669				    { "name", "property", "value", "received",
1670				    "source", "all", NULL };
1671
1672				if (i == ZFS_GET_NCOLS) {
1673					(void) fprintf(stderr, gettext("too "
1674					    "many fields given to -o "
1675					    "option\n"));
1676					usage(B_FALSE);
1677				}
1678
1679				switch (getsubopt(&optarg, col_subopts,
1680				    &value)) {
1681				case 0:
1682					cb.cb_columns[i++] = GET_COL_NAME;
1683					break;
1684				case 1:
1685					cb.cb_columns[i++] = GET_COL_PROPERTY;
1686					break;
1687				case 2:
1688					cb.cb_columns[i++] = GET_COL_VALUE;
1689					break;
1690				case 3:
1691					cb.cb_columns[i++] = GET_COL_RECVD;
1692					flags |= ZFS_ITER_RECVD_PROPS;
1693					break;
1694				case 4:
1695					cb.cb_columns[i++] = GET_COL_SOURCE;
1696					break;
1697				case 5:
1698					if (i > 0) {
1699						(void) fprintf(stderr,
1700						    gettext("\"all\" conflicts "
1701						    "with specific fields "
1702						    "given to -o option\n"));
1703						usage(B_FALSE);
1704					}
1705					cb.cb_columns[0] = GET_COL_NAME;
1706					cb.cb_columns[1] = GET_COL_PROPERTY;
1707					cb.cb_columns[2] = GET_COL_VALUE;
1708					cb.cb_columns[3] = GET_COL_RECVD;
1709					cb.cb_columns[4] = GET_COL_SOURCE;
1710					flags |= ZFS_ITER_RECVD_PROPS;
1711					i = ZFS_GET_NCOLS;
1712					break;
1713				default:
1714					(void) fprintf(stderr,
1715					    gettext("invalid column name "
1716					    "'%s'\n"), suboptarg);
1717					usage(B_FALSE);
1718				}
1719			}
1720			break;
1721
1722		case 's':
1723			cb.cb_sources = 0;
1724			while (*optarg != '\0') {
1725				static char *source_subopts[] = {
1726					"local", "default", "inherited",
1727					"received", "temporary", "none",
1728					NULL };
1729
1730				switch (getsubopt(&optarg, source_subopts,
1731				    &value)) {
1732				case 0:
1733					cb.cb_sources |= ZPROP_SRC_LOCAL;
1734					break;
1735				case 1:
1736					cb.cb_sources |= ZPROP_SRC_DEFAULT;
1737					break;
1738				case 2:
1739					cb.cb_sources |= ZPROP_SRC_INHERITED;
1740					break;
1741				case 3:
1742					cb.cb_sources |= ZPROP_SRC_RECEIVED;
1743					break;
1744				case 4:
1745					cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1746					break;
1747				case 5:
1748					cb.cb_sources |= ZPROP_SRC_NONE;
1749					break;
1750				default:
1751					(void) fprintf(stderr,
1752					    gettext("invalid source "
1753					    "'%s'\n"), suboptarg);
1754					usage(B_FALSE);
1755				}
1756			}
1757			break;
1758
1759		case 't':
1760			types = 0;
1761			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1762			while (*optarg != '\0') {
1763				static char *type_subopts[] = { "filesystem",
1764				    "volume", "snapshot", "bookmark",
1765				    "all", NULL };
1766
1767				switch (getsubopt(&optarg, type_subopts,
1768				    &value)) {
1769				case 0:
1770					types |= ZFS_TYPE_FILESYSTEM;
1771					break;
1772				case 1:
1773					types |= ZFS_TYPE_VOLUME;
1774					break;
1775				case 2:
1776					types |= ZFS_TYPE_SNAPSHOT;
1777					break;
1778				case 3:
1779					types |= ZFS_TYPE_BOOKMARK;
1780					break;
1781				case 4:
1782					types = ZFS_TYPE_DATASET |
1783					    ZFS_TYPE_BOOKMARK;
1784					break;
1785
1786				default:
1787					(void) fprintf(stderr,
1788					    gettext("invalid type '%s'\n"),
1789					    suboptarg);
1790					usage(B_FALSE);
1791				}
1792			}
1793			break;
1794
1795		case '?':
1796			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1797			    optopt);
1798			usage(B_FALSE);
1799		}
1800	}
1801
1802	argc -= optind;
1803	argv += optind;
1804
1805	if (argc < 1) {
1806		(void) fprintf(stderr, gettext("missing property "
1807		    "argument\n"));
1808		usage(B_FALSE);
1809	}
1810
1811	fields = argv[0];
1812
1813	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1814	    != 0)
1815		usage(B_FALSE);
1816
1817	argc--;
1818	argv++;
1819
1820	/*
1821	 * As part of zfs_expand_proplist(), we keep track of the maximum column
1822	 * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1823	 * need to know the maximum name length.  However, the user likely did
1824	 * not specify 'name' as one of the properties to fetch, so we need to
1825	 * make sure we always include at least this property for
1826	 * print_get_headers() to work properly.
1827	 */
1828	if (cb.cb_proplist != NULL) {
1829		fake_name.pl_prop = ZFS_PROP_NAME;
1830		fake_name.pl_width = strlen(gettext("NAME"));
1831		fake_name.pl_next = cb.cb_proplist;
1832		cb.cb_proplist = &fake_name;
1833	}
1834
1835	cb.cb_first = B_TRUE;
1836
1837	/* run for each object */
1838	ret = zfs_for_each(argc, argv, flags, types, NULL,
1839	    &cb.cb_proplist, limit, get_callback, &cb);
1840
1841	if (cb.cb_proplist == &fake_name)
1842		zprop_free_list(fake_name.pl_next);
1843	else
1844		zprop_free_list(cb.cb_proplist);
1845
1846	return (ret);
1847}
1848
1849/*
1850 * inherit [-rS] <property> <fs|vol> ...
1851 *
1852 *	-r	Recurse over all children
1853 *	-S	Revert to received value, if any
1854 *
1855 * For each dataset specified on the command line, inherit the given property
1856 * from its parent.  Inheriting a property at the pool level will cause it to
1857 * use the default value.  The '-r' flag will recurse over all children, and is
1858 * useful for setting a property on a hierarchy-wide basis, regardless of any
1859 * local modifications for each dataset.
1860 */
1861
1862typedef struct inherit_cbdata {
1863	const char *cb_propname;
1864	boolean_t cb_received;
1865} inherit_cbdata_t;
1866
1867static int
1868inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1869{
1870	inherit_cbdata_t *cb = data;
1871	zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1872
1873	/*
1874	 * If we're doing it recursively, then ignore properties that
1875	 * are not valid for this type of dataset.
1876	 */
1877	if (prop != ZPROP_INVAL &&
1878	    !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1879		return (0);
1880
1881	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1882}
1883
1884static int
1885inherit_cb(zfs_handle_t *zhp, void *data)
1886{
1887	inherit_cbdata_t *cb = data;
1888
1889	return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1890}
1891
1892static int
1893zfs_do_inherit(int argc, char **argv)
1894{
1895	int c;
1896	zfs_prop_t prop;
1897	inherit_cbdata_t cb = { 0 };
1898	char *propname;
1899	int ret = 0;
1900	int flags = 0;
1901	boolean_t received = B_FALSE;
1902
1903	/* check options */
1904	while ((c = getopt(argc, argv, "rS")) != -1) {
1905		switch (c) {
1906		case 'r':
1907			flags |= ZFS_ITER_RECURSE;
1908			break;
1909		case 'S':
1910			received = B_TRUE;
1911			break;
1912		case '?':
1913		default:
1914			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
1915			    optopt);
1916			usage(B_FALSE);
1917		}
1918	}
1919
1920	argc -= optind;
1921	argv += optind;
1922
1923	/* check number of arguments */
1924	if (argc < 1) {
1925		(void) fprintf(stderr, gettext("missing property argument\n"));
1926		usage(B_FALSE);
1927	}
1928	if (argc < 2) {
1929		(void) fprintf(stderr, gettext("missing dataset argument\n"));
1930		usage(B_FALSE);
1931	}
1932
1933	propname = argv[0];
1934	argc--;
1935	argv++;
1936
1937	if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1938		if (zfs_prop_readonly(prop)) {
1939			(void) fprintf(stderr, gettext(
1940			    "%s property is read-only\n"),
1941			    propname);
1942			return (1);
1943		}
1944		if (!zfs_prop_inheritable(prop) && !received) {
1945			(void) fprintf(stderr, gettext("'%s' property cannot "
1946			    "be inherited\n"), propname);
1947			if (prop == ZFS_PROP_QUOTA ||
1948			    prop == ZFS_PROP_RESERVATION ||
1949			    prop == ZFS_PROP_REFQUOTA ||
1950			    prop == ZFS_PROP_REFRESERVATION) {
1951				(void) fprintf(stderr, gettext("use 'zfs set "
1952				    "%s=none' to clear\n"), propname);
1953				(void) fprintf(stderr, gettext("use 'zfs "
1954				    "inherit -S %s' to revert to received "
1955				    "value\n"), propname);
1956			}
1957			return (1);
1958		}
1959		if (received && (prop == ZFS_PROP_VOLSIZE ||
1960		    prop == ZFS_PROP_VERSION)) {
1961			(void) fprintf(stderr, gettext("'%s' property cannot "
1962			    "be reverted to a received value\n"), propname);
1963			return (1);
1964		}
1965	} else if (!zfs_prop_user(propname)) {
1966		(void) fprintf(stderr, gettext("invalid property '%s'\n"),
1967		    propname);
1968		usage(B_FALSE);
1969	}
1970
1971	cb.cb_propname = propname;
1972	cb.cb_received = received;
1973
1974	if (flags & ZFS_ITER_RECURSE) {
1975		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1976		    NULL, NULL, 0, inherit_recurse_cb, &cb);
1977	} else {
1978		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1979		    NULL, NULL, 0, inherit_cb, &cb);
1980	}
1981
1982	return (ret);
1983}
1984
1985typedef struct upgrade_cbdata {
1986	uint64_t cb_numupgraded;
1987	uint64_t cb_numsamegraded;
1988	uint64_t cb_numfailed;
1989	uint64_t cb_version;
1990	boolean_t cb_newer;
1991	boolean_t cb_foundone;
1992	char cb_lastfs[ZFS_MAXNAMELEN];
1993} upgrade_cbdata_t;
1994
1995static int
1996same_pool(zfs_handle_t *zhp, const char *name)
1997{
1998	int len1 = strcspn(name, "/@");
1999	const char *zhname = zfs_get_name(zhp);
2000	int len2 = strcspn(zhname, "/@");
2001
2002	if (len1 != len2)
2003		return (B_FALSE);
2004	return (strncmp(name, zhname, len1) == 0);
2005}
2006
2007static int
2008upgrade_list_callback(zfs_handle_t *zhp, void *data)
2009{
2010	upgrade_cbdata_t *cb = data;
2011	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
2012
2013	/* list if it's old/new */
2014	if ((!cb->cb_newer && version < ZPL_VERSION) ||
2015	    (cb->cb_newer && version > ZPL_VERSION)) {
2016		char *str;
2017		if (cb->cb_newer) {
2018			str = gettext("The following filesystems are "
2019			    "formatted using a newer software version and\n"
2020			    "cannot be accessed on the current system.\n\n");
2021		} else {
2022			str = gettext("The following filesystems are "
2023			    "out of date, and can be upgraded.  After being\n"
2024			    "upgraded, these filesystems (and any 'zfs send' "
2025			    "streams generated from\n"
2026			    "subsequent snapshots) will no longer be "
2027			    "accessible by older software versions.\n\n");
2028		}
2029
2030		if (!cb->cb_foundone) {
2031			(void) puts(str);
2032			(void) printf(gettext("VER  FILESYSTEM\n"));
2033			(void) printf(gettext("---  ------------\n"));
2034			cb->cb_foundone = B_TRUE;
2035		}
2036
2037		(void) printf("%2u   %s\n", version, zfs_get_name(zhp));
2038	}
2039
2040	return (0);
2041}
2042
2043static int
2044upgrade_set_callback(zfs_handle_t *zhp, void *data)
2045{
2046	upgrade_cbdata_t *cb = data;
2047	int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
2048	int needed_spa_version;
2049	int spa_version;
2050
2051	if (zfs_spa_version(zhp, &spa_version) < 0)
2052		return (-1);
2053
2054	needed_spa_version = zfs_spa_version_map(cb->cb_version);
2055
2056	if (needed_spa_version < 0)
2057		return (-1);
2058
2059	if (spa_version < needed_spa_version) {
2060		/* can't upgrade */
2061		(void) printf(gettext("%s: can not be "
2062		    "upgraded; the pool version needs to first "
2063		    "be upgraded\nto version %d\n\n"),
2064		    zfs_get_name(zhp), needed_spa_version);
2065		cb->cb_numfailed++;
2066		return (0);
2067	}
2068
2069	/* upgrade */
2070	if (version < cb->cb_version) {
2071		char verstr[16];
2072		(void) snprintf(verstr, sizeof (verstr),
2073		    "%llu", cb->cb_version);
2074		if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
2075			/*
2076			 * If they did "zfs upgrade -a", then we could
2077			 * be doing ioctls to different pools.  We need
2078			 * to log this history once to each pool, and bypass
2079			 * the normal history logging that happens in main().
2080			 */
2081			(void) zpool_log_history(g_zfs, history_str);
2082			log_history = B_FALSE;
2083		}
2084		if (zfs_prop_set(zhp, "version", verstr) == 0)
2085			cb->cb_numupgraded++;
2086		else
2087			cb->cb_numfailed++;
2088		(void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
2089	} else if (version > cb->cb_version) {
2090		/* can't downgrade */
2091		(void) printf(gettext("%s: can not be downgraded; "
2092		    "it is already at version %u\n"),
2093		    zfs_get_name(zhp), version);
2094		cb->cb_numfailed++;
2095	} else {
2096		cb->cb_numsamegraded++;
2097	}
2098	return (0);
2099}
2100
2101/*
2102 * zfs upgrade
2103 * zfs upgrade -v
2104 * zfs upgrade [-r] [-V <version>] <-a | filesystem>
2105 */
2106static int
2107zfs_do_upgrade(int argc, char **argv)
2108{
2109	boolean_t all = B_FALSE;
2110	boolean_t showversions = B_FALSE;
2111	int ret = 0;
2112	upgrade_cbdata_t cb = { 0 };
2113	int c;
2114	int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
2115
2116	/* check options */
2117	while ((c = getopt(argc, argv, "rvV:a")) != -1) {
2118		switch (c) {
2119		case 'r':
2120			flags |= ZFS_ITER_RECURSE;
2121			break;
2122		case 'v':
2123			showversions = B_TRUE;
2124			break;
2125		case 'V':
2126			if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
2127			    optarg, &cb.cb_version) != 0) {
2128				(void) fprintf(stderr,
2129				    gettext("invalid version %s\n"), optarg);
2130				usage(B_FALSE);
2131			}
2132			break;
2133		case 'a':
2134			all = B_TRUE;
2135			break;
2136		case '?':
2137		default:
2138			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2139			    optopt);
2140			usage(B_FALSE);
2141		}
2142	}
2143
2144	argc -= optind;
2145	argv += optind;
2146
2147	if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
2148		usage(B_FALSE);
2149	if (showversions && (flags & ZFS_ITER_RECURSE || all ||
2150	    cb.cb_version || argc))
2151		usage(B_FALSE);
2152	if ((all || argc) && (showversions))
2153		usage(B_FALSE);
2154	if (all && argc)
2155		usage(B_FALSE);
2156
2157	if (showversions) {
2158		/* Show info on available versions. */
2159		(void) printf(gettext("The following filesystem versions are "
2160		    "supported:\n\n"));
2161		(void) printf(gettext("VER  DESCRIPTION\n"));
2162		(void) printf("---  -----------------------------------------"
2163		    "---------------\n");
2164		(void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
2165		(void) printf(gettext(" 2   Enhanced directory entries\n"));
2166		(void) printf(gettext(" 3   Case insensitive and filesystem "
2167		    "user identifier (FUID)\n"));
2168		(void) printf(gettext(" 4   userquota, groupquota "
2169		    "properties\n"));
2170		(void) printf(gettext(" 5   System attributes\n"));
2171		(void) printf(gettext("\nFor more information on a particular "
2172		    "version, including supported releases,\n"));
2173		(void) printf("see the ZFS Administration Guide.\n\n");
2174		ret = 0;
2175	} else if (argc || all) {
2176		/* Upgrade filesystems */
2177		if (cb.cb_version == 0)
2178			cb.cb_version = ZPL_VERSION;
2179		ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
2180		    NULL, NULL, 0, upgrade_set_callback, &cb);
2181		(void) printf(gettext("%llu filesystems upgraded\n"),
2182		    cb.cb_numupgraded);
2183		if (cb.cb_numsamegraded) {
2184			(void) printf(gettext("%llu filesystems already at "
2185			    "this version\n"),
2186			    cb.cb_numsamegraded);
2187		}
2188		if (cb.cb_numfailed != 0)
2189			ret = 1;
2190	} else {
2191		/* List old-version filesytems */
2192		boolean_t found;
2193		(void) printf(gettext("This system is currently running "
2194		    "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
2195
2196		flags |= ZFS_ITER_RECURSE;
2197		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2198		    NULL, NULL, 0, upgrade_list_callback, &cb);
2199
2200		found = cb.cb_foundone;
2201		cb.cb_foundone = B_FALSE;
2202		cb.cb_newer = B_TRUE;
2203
2204		ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2205		    NULL, NULL, 0, upgrade_list_callback, &cb);
2206
2207		if (!cb.cb_foundone && !found) {
2208			(void) printf(gettext("All filesystems are "
2209			    "formatted with the current version.\n"));
2210		}
2211	}
2212
2213	return (ret);
2214}
2215
2216/*
2217 * zfs userspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2218 *               [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2219 * zfs groupspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2220 *                [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2221 *
2222 *	-H      Scripted mode; elide headers and separate columns by tabs.
2223 *	-i	Translate SID to POSIX ID.
2224 *	-n	Print numeric ID instead of user/group name.
2225 *	-o      Control which fields to display.
2226 *	-p	Use exact (parsable) numeric output.
2227 *	-s      Specify sort columns, descending order.
2228 *	-S      Specify sort columns, ascending order.
2229 *	-t      Control which object types to display.
2230 *
2231 *	Displays space consumed by, and quotas on, each user in the specified
2232 *	filesystem or snapshot.
2233 */
2234
2235/* us_field_types, us_field_hdr and us_field_names should be kept in sync */
2236enum us_field_types {
2237	USFIELD_TYPE,
2238	USFIELD_NAME,
2239	USFIELD_USED,
2240	USFIELD_QUOTA
2241};
2242static char *us_field_hdr[] = { "TYPE", "NAME", "USED", "QUOTA" };
2243static char *us_field_names[] = { "type", "name", "used", "quota" };
2244#define	USFIELD_LAST	(sizeof (us_field_names) / sizeof (char *))
2245
2246#define	USTYPE_PSX_GRP	(1 << 0)
2247#define	USTYPE_PSX_USR	(1 << 1)
2248#define	USTYPE_SMB_GRP	(1 << 2)
2249#define	USTYPE_SMB_USR	(1 << 3)
2250#define	USTYPE_ALL	\
2251	(USTYPE_PSX_GRP | USTYPE_PSX_USR | USTYPE_SMB_GRP | USTYPE_SMB_USR)
2252
2253static int us_type_bits[] = {
2254	USTYPE_PSX_GRP,
2255	USTYPE_PSX_USR,
2256	USTYPE_SMB_GRP,
2257	USTYPE_SMB_USR,
2258	USTYPE_ALL
2259};
2260static char *us_type_names[] = { "posixgroup", "posixuser", "smbgroup",
2261	"smbuser", "all" };
2262
2263typedef struct us_node {
2264	nvlist_t	*usn_nvl;
2265	uu_avl_node_t	usn_avlnode;
2266	uu_list_node_t	usn_listnode;
2267} us_node_t;
2268
2269typedef struct us_cbdata {
2270	nvlist_t	**cb_nvlp;
2271	uu_avl_pool_t	*cb_avl_pool;
2272	uu_avl_t	*cb_avl;
2273	boolean_t	cb_numname;
2274	boolean_t	cb_nicenum;
2275	boolean_t	cb_sid2posix;
2276	zfs_userquota_prop_t cb_prop;
2277	zfs_sort_column_t *cb_sortcol;
2278	size_t		cb_width[USFIELD_LAST];
2279} us_cbdata_t;
2280
2281static boolean_t us_populated = B_FALSE;
2282
2283typedef struct {
2284	zfs_sort_column_t *si_sortcol;
2285	boolean_t	si_numname;
2286} us_sort_info_t;
2287
2288static int
2289us_field_index(char *field)
2290{
2291	int i;
2292
2293	for (i = 0; i < USFIELD_LAST; i++) {
2294		if (strcmp(field, us_field_names[i]) == 0)
2295			return (i);
2296	}
2297
2298	return (-1);
2299}
2300
2301static int
2302us_compare(const void *larg, const void *rarg, void *unused)
2303{
2304	const us_node_t *l = larg;
2305	const us_node_t *r = rarg;
2306	us_sort_info_t *si = (us_sort_info_t *)unused;
2307	zfs_sort_column_t *sortcol = si->si_sortcol;
2308	boolean_t numname = si->si_numname;
2309	nvlist_t *lnvl = l->usn_nvl;
2310	nvlist_t *rnvl = r->usn_nvl;
2311	int rc = 0;
2312	boolean_t lvb, rvb;
2313
2314	for (; sortcol != NULL; sortcol = sortcol->sc_next) {
2315		char *lvstr = "";
2316		char *rvstr = "";
2317		uint32_t lv32 = 0;
2318		uint32_t rv32 = 0;
2319		uint64_t lv64 = 0;
2320		uint64_t rv64 = 0;
2321		zfs_prop_t prop = sortcol->sc_prop;
2322		const char *propname = NULL;
2323		boolean_t reverse = sortcol->sc_reverse;
2324
2325		switch (prop) {
2326		case ZFS_PROP_TYPE:
2327			propname = "type";
2328			(void) nvlist_lookup_uint32(lnvl, propname, &lv32);
2329			(void) nvlist_lookup_uint32(rnvl, propname, &rv32);
2330			if (rv32 != lv32)
2331				rc = (rv32 < lv32) ? 1 : -1;
2332			break;
2333		case ZFS_PROP_NAME:
2334			propname = "name";
2335			if (numname) {
2336				(void) nvlist_lookup_uint64(lnvl, propname,
2337				    &lv64);
2338				(void) nvlist_lookup_uint64(rnvl, propname,
2339				    &rv64);
2340				if (rv64 != lv64)
2341					rc = (rv64 < lv64) ? 1 : -1;
2342			} else {
2343				(void) nvlist_lookup_string(lnvl, propname,
2344				    &lvstr);
2345				(void) nvlist_lookup_string(rnvl, propname,
2346				    &rvstr);
2347				rc = strcmp(lvstr, rvstr);
2348			}
2349			break;
2350		case ZFS_PROP_USED:
2351		case ZFS_PROP_QUOTA:
2352			if (!us_populated)
2353				break;
2354			if (prop == ZFS_PROP_USED)
2355				propname = "used";
2356			else
2357				propname = "quota";
2358			(void) nvlist_lookup_uint64(lnvl, propname, &lv64);
2359			(void) nvlist_lookup_uint64(rnvl, propname, &rv64);
2360			if (rv64 != lv64)
2361				rc = (rv64 < lv64) ? 1 : -1;
2362			break;
2363
2364		default:
2365			break;
2366		}
2367
2368		if (rc != 0) {
2369			if (rc < 0)
2370				return (reverse ? 1 : -1);
2371			else
2372				return (reverse ? -1 : 1);
2373		}
2374	}
2375
2376	/*
2377	 * If entries still seem to be the same, check if they are of the same
2378	 * type (smbentity is added only if we are doing SID to POSIX ID
2379	 * translation where we can have duplicate type/name combinations).
2380	 */
2381	if (nvlist_lookup_boolean_value(lnvl, "smbentity", &lvb) == 0 &&
2382	    nvlist_lookup_boolean_value(rnvl, "smbentity", &rvb) == 0 &&
2383	    lvb != rvb)
2384		return (lvb < rvb ? -1 : 1);
2385
2386	return (0);
2387}
2388
2389static inline const char *
2390us_type2str(unsigned field_type)
2391{
2392	switch (field_type) {
2393	case USTYPE_PSX_USR:
2394		return ("POSIX User");
2395	case USTYPE_PSX_GRP:
2396		return ("POSIX Group");
2397	case USTYPE_SMB_USR:
2398		return ("SMB User");
2399	case USTYPE_SMB_GRP:
2400		return ("SMB Group");
2401	default:
2402		return ("Undefined");
2403	}
2404}
2405
2406static int
2407userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
2408{
2409	us_cbdata_t *cb = (us_cbdata_t *)arg;
2410	zfs_userquota_prop_t prop = cb->cb_prop;
2411	char *name = NULL;
2412	char *propname;
2413	char sizebuf[32];
2414	us_node_t *node;
2415	uu_avl_pool_t *avl_pool = cb->cb_avl_pool;
2416	uu_avl_t *avl = cb->cb_avl;
2417	uu_avl_index_t idx;
2418	nvlist_t *props;
2419	us_node_t *n;
2420	zfs_sort_column_t *sortcol = cb->cb_sortcol;
2421	unsigned type = 0;
2422	const char *typestr;
2423	size_t namelen;
2424	size_t typelen;
2425	size_t sizelen;
2426	int typeidx, nameidx, sizeidx;
2427	us_sort_info_t sortinfo = { sortcol, cb->cb_numname };
2428	boolean_t smbentity = B_FALSE;
2429
2430	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
2431		nomem();
2432	node = safe_malloc(sizeof (us_node_t));
2433	uu_avl_node_init(node, &node->usn_avlnode, avl_pool);
2434	node->usn_nvl = props;
2435
2436	if (domain != NULL && domain[0] != '\0') {
2437		/* SMB */
2438		char sid[ZFS_MAXNAMELEN + 32];
2439		uid_t id;
2440#ifdef illumos
2441		int err;
2442		int flag = IDMAP_REQ_FLG_USE_CACHE;
2443#endif
2444
2445		smbentity = B_TRUE;
2446
2447		(void) snprintf(sid, sizeof (sid), "%s-%u", domain, rid);
2448
2449		if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2450			type = USTYPE_SMB_GRP;
2451#ifdef illumos
2452			err = sid_to_id(sid, B_FALSE, &id);
2453#endif
2454		} else {
2455			type = USTYPE_SMB_USR;
2456#ifdef illumos
2457			err = sid_to_id(sid, B_TRUE, &id);
2458#endif
2459		}
2460
2461#ifdef illumos
2462		if (err == 0) {
2463			rid = id;
2464			if (!cb->cb_sid2posix) {
2465				if (type == USTYPE_SMB_USR) {
2466					(void) idmap_getwinnamebyuid(rid, flag,
2467					    &name, NULL);
2468				} else {
2469					(void) idmap_getwinnamebygid(rid, flag,
2470					    &name, NULL);
2471				}
2472				if (name == NULL)
2473					name = sid;
2474			}
2475		}
2476#endif
2477	}
2478
2479	if (cb->cb_sid2posix || domain == NULL || domain[0] == '\0') {
2480		/* POSIX or -i */
2481		if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2482			type = USTYPE_PSX_GRP;
2483			if (!cb->cb_numname) {
2484				struct group *g;
2485
2486				if ((g = getgrgid(rid)) != NULL)
2487					name = g->gr_name;
2488			}
2489		} else {
2490			type = USTYPE_PSX_USR;
2491			if (!cb->cb_numname) {
2492				struct passwd *p;
2493
2494				if ((p = getpwuid(rid)) != NULL)
2495					name = p->pw_name;
2496			}
2497		}
2498	}
2499
2500	/*
2501	 * Make sure that the type/name combination is unique when doing
2502	 * SID to POSIX ID translation (hence changing the type from SMB to
2503	 * POSIX).
2504	 */
2505	if (cb->cb_sid2posix &&
2506	    nvlist_add_boolean_value(props, "smbentity", smbentity) != 0)
2507		nomem();
2508
2509	/* Calculate/update width of TYPE field */
2510	typestr = us_type2str(type);
2511	typelen = strlen(gettext(typestr));
2512	typeidx = us_field_index("type");
2513	if (typelen > cb->cb_width[typeidx])
2514		cb->cb_width[typeidx] = typelen;
2515	if (nvlist_add_uint32(props, "type", type) != 0)
2516		nomem();
2517
2518	/* Calculate/update width of NAME field */
2519	if ((cb->cb_numname && cb->cb_sid2posix) || name == NULL) {
2520		if (nvlist_add_uint64(props, "name", rid) != 0)
2521			nomem();
2522		namelen = snprintf(NULL, 0, "%u", rid);
2523	} else {
2524		if (nvlist_add_string(props, "name", name) != 0)
2525			nomem();
2526		namelen = strlen(name);
2527	}
2528	nameidx = us_field_index("name");
2529	if (namelen > cb->cb_width[nameidx])
2530		cb->cb_width[nameidx] = namelen;
2531
2532	/*
2533	 * Check if this type/name combination is in the list and update it;
2534	 * otherwise add new node to the list.
2535	 */
2536	if ((n = uu_avl_find(avl, node, &sortinfo, &idx)) == NULL) {
2537		uu_avl_insert(avl, node, idx);
2538	} else {
2539		nvlist_free(props);
2540		free(node);
2541		node = n;
2542		props = node->usn_nvl;
2543	}
2544
2545	/* Calculate/update width of USED/QUOTA fields */
2546	if (cb->cb_nicenum)
2547		zfs_nicenum(space, sizebuf, sizeof (sizebuf));
2548	else
2549		(void) snprintf(sizebuf, sizeof (sizebuf), "%llu", space);
2550	sizelen = strlen(sizebuf);
2551	if (prop == ZFS_PROP_USERUSED || prop == ZFS_PROP_GROUPUSED) {
2552		propname = "used";
2553		if (!nvlist_exists(props, "quota"))
2554			(void) nvlist_add_uint64(props, "quota", 0);
2555	} else {
2556		propname = "quota";
2557		if (!nvlist_exists(props, "used"))
2558			(void) nvlist_add_uint64(props, "used", 0);
2559	}
2560	sizeidx = us_field_index(propname);
2561	if (sizelen > cb->cb_width[sizeidx])
2562		cb->cb_width[sizeidx] = sizelen;
2563
2564	if (nvlist_add_uint64(props, propname, space) != 0)
2565		nomem();
2566
2567	return (0);
2568}
2569
2570static void
2571print_us_node(boolean_t scripted, boolean_t parsable, int *fields, int types,
2572    size_t *width, us_node_t *node)
2573{
2574	nvlist_t *nvl = node->usn_nvl;
2575	char valstr[ZFS_MAXNAMELEN];
2576	boolean_t first = B_TRUE;
2577	int cfield = 0;
2578	int field;
2579	uint32_t ustype;
2580
2581	/* Check type */
2582	(void) nvlist_lookup_uint32(nvl, "type", &ustype);
2583	if (!(ustype & types))
2584		return;
2585
2586	while ((field = fields[cfield]) != USFIELD_LAST) {
2587		nvpair_t *nvp = NULL;
2588		data_type_t type;
2589		uint32_t val32;
2590		uint64_t val64;
2591		char *strval = NULL;
2592
2593		while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
2594			if (strcmp(nvpair_name(nvp),
2595			    us_field_names[field]) == 0)
2596				break;
2597		}
2598
2599		type = nvpair_type(nvp);
2600		switch (type) {
2601		case DATA_TYPE_UINT32:
2602			(void) nvpair_value_uint32(nvp, &val32);
2603			break;
2604		case DATA_TYPE_UINT64:
2605			(void) nvpair_value_uint64(nvp, &val64);
2606			break;
2607		case DATA_TYPE_STRING:
2608			(void) nvpair_value_string(nvp, &strval);
2609			break;
2610		default:
2611			(void) fprintf(stderr, "invalid data type\n");
2612		}
2613
2614		switch (field) {
2615		case USFIELD_TYPE:
2616			strval = (char *)us_type2str(val32);
2617			break;
2618		case USFIELD_NAME:
2619			if (type == DATA_TYPE_UINT64) {
2620				(void) sprintf(valstr, "%llu", val64);
2621				strval = valstr;
2622			}
2623			break;
2624		case USFIELD_USED:
2625		case USFIELD_QUOTA:
2626			if (type == DATA_TYPE_UINT64) {
2627				if (parsable) {
2628					(void) sprintf(valstr, "%llu", val64);
2629				} else {
2630					zfs_nicenum(val64, valstr,
2631					    sizeof (valstr));
2632				}
2633				if (field == USFIELD_QUOTA &&
2634				    strcmp(valstr, "0") == 0)
2635					strval = "none";
2636				else
2637					strval = valstr;
2638			}
2639			break;
2640		}
2641
2642		if (!first) {
2643			if (scripted)
2644				(void) printf("\t");
2645			else
2646				(void) printf("  ");
2647		}
2648		if (scripted)
2649			(void) printf("%s", strval);
2650		else if (field == USFIELD_TYPE || field == USFIELD_NAME)
2651			(void) printf("%-*s", width[field], strval);
2652		else
2653			(void) printf("%*s", width[field], strval);
2654
2655		first = B_FALSE;
2656		cfield++;
2657	}
2658
2659	(void) printf("\n");
2660}
2661
2662static void
2663print_us(boolean_t scripted, boolean_t parsable, int *fields, int types,
2664    size_t *width, boolean_t rmnode, uu_avl_t *avl)
2665{
2666	us_node_t *node;
2667	const char *col;
2668	int cfield = 0;
2669	int field;
2670
2671	if (!scripted) {
2672		boolean_t first = B_TRUE;
2673
2674		while ((field = fields[cfield]) != USFIELD_LAST) {
2675			col = gettext(us_field_hdr[field]);
2676			if (field == USFIELD_TYPE || field == USFIELD_NAME) {
2677				(void) printf(first ? "%-*s" : "  %-*s",
2678				    width[field], col);
2679			} else {
2680				(void) printf(first ? "%*s" : "  %*s",
2681				    width[field], col);
2682			}
2683			first = B_FALSE;
2684			cfield++;
2685		}
2686		(void) printf("\n");
2687	}
2688
2689	for (node = uu_avl_first(avl); node; node = uu_avl_next(avl, node)) {
2690		print_us_node(scripted, parsable, fields, types, width, node);
2691		if (rmnode)
2692			nvlist_free(node->usn_nvl);
2693	}
2694}
2695
2696static int
2697zfs_do_userspace(int argc, char **argv)
2698{
2699	zfs_handle_t *zhp;
2700	zfs_userquota_prop_t p;
2701
2702	uu_avl_pool_t *avl_pool;
2703	uu_avl_t *avl_tree;
2704	uu_avl_walk_t *walk;
2705	char *delim;
2706	char deffields[] = "type,name,used,quota";
2707	char *ofield = NULL;
2708	char *tfield = NULL;
2709	int cfield = 0;
2710	int fields[256];
2711	int i;
2712	boolean_t scripted = B_FALSE;
2713	boolean_t prtnum = B_FALSE;
2714	boolean_t parsable = B_FALSE;
2715	boolean_t sid2posix = B_FALSE;
2716	int ret = 0;
2717	int c;
2718	zfs_sort_column_t *sortcol = NULL;
2719	int types = USTYPE_PSX_USR | USTYPE_SMB_USR;
2720	us_cbdata_t cb;
2721	us_node_t *node;
2722	us_node_t *rmnode;
2723	uu_list_pool_t *listpool;
2724	uu_list_t *list;
2725	uu_avl_index_t idx = 0;
2726	uu_list_index_t idx2 = 0;
2727
2728	if (argc < 2)
2729		usage(B_FALSE);
2730
2731	if (strcmp(argv[0], "groupspace") == 0)
2732		/* Toggle default group types */
2733		types = USTYPE_PSX_GRP | USTYPE_SMB_GRP;
2734
2735	while ((c = getopt(argc, argv, "nHpo:s:S:t:i")) != -1) {
2736		switch (c) {
2737		case 'n':
2738			prtnum = B_TRUE;
2739			break;
2740		case 'H':
2741			scripted = B_TRUE;
2742			break;
2743		case 'p':
2744			parsable = B_TRUE;
2745			break;
2746		case 'o':
2747			ofield = optarg;
2748			break;
2749		case 's':
2750		case 'S':
2751			if (zfs_add_sort_column(&sortcol, optarg,
2752			    c == 's' ? B_FALSE : B_TRUE) != 0) {
2753				(void) fprintf(stderr,
2754				    gettext("invalid field '%s'\n"), optarg);
2755				usage(B_FALSE);
2756			}
2757			break;
2758		case 't':
2759			tfield = optarg;
2760			break;
2761		case 'i':
2762			sid2posix = B_TRUE;
2763			break;
2764		case ':':
2765			(void) fprintf(stderr, gettext("missing argument for "
2766			    "'%c' option\n"), optopt);
2767			usage(B_FALSE);
2768			break;
2769		case '?':
2770			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
2771			    optopt);
2772			usage(B_FALSE);
2773		}
2774	}
2775
2776	argc -= optind;
2777	argv += optind;
2778
2779	if (argc < 1) {
2780		(void) fprintf(stderr, gettext("missing dataset name\n"));
2781		usage(B_FALSE);
2782	}
2783	if (argc > 1) {
2784		(void) fprintf(stderr, gettext("too many arguments\n"));
2785		usage(B_FALSE);
2786	}
2787
2788	/* Use default output fields if not specified using -o */
2789	if (ofield == NULL)
2790		ofield = deffields;
2791	do {
2792		if ((delim = strchr(ofield, ',')) != NULL)
2793			*delim = '\0';
2794		if ((fields[cfield++] = us_field_index(ofield)) == -1) {
2795			(void) fprintf(stderr, gettext("invalid type '%s' "
2796			    "for -o option\n"), ofield);
2797			return (-1);
2798		}
2799		if (delim != NULL)
2800			ofield = delim + 1;
2801	} while (delim != NULL);
2802	fields[cfield] = USFIELD_LAST;
2803
2804	/* Override output types (-t option) */
2805	if (tfield != NULL) {
2806		types = 0;
2807
2808		do {
2809			boolean_t found = B_FALSE;
2810
2811			if ((delim = strchr(tfield, ',')) != NULL)
2812				*delim = '\0';
2813			for (i = 0; i < sizeof (us_type_bits) / sizeof (int);
2814			    i++) {
2815				if (strcmp(tfield, us_type_names[i]) == 0) {
2816					found = B_TRUE;
2817					types |= us_type_bits[i];
2818					break;
2819				}
2820			}
2821			if (!found) {
2822				(void) fprintf(stderr, gettext("invalid type "
2823				    "'%s' for -t option\n"), tfield);
2824				return (-1);
2825			}
2826			if (delim != NULL)
2827				tfield = delim + 1;
2828		} while (delim != NULL);
2829	}
2830
2831	if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
2832		return (1);
2833
2834	if ((avl_pool = uu_avl_pool_create("us_avl_pool", sizeof (us_node_t),
2835	    offsetof(us_node_t, usn_avlnode), us_compare, UU_DEFAULT)) == NULL)
2836		nomem();
2837	if ((avl_tree = uu_avl_create(avl_pool, NULL, UU_DEFAULT)) == NULL)
2838		nomem();
2839
2840	/* Always add default sorting columns */
2841	(void) zfs_add_sort_column(&sortcol, "type", B_FALSE);
2842	(void) zfs_add_sort_column(&sortcol, "name", B_FALSE);
2843
2844	cb.cb_sortcol = sortcol;
2845	cb.cb_numname = prtnum;
2846	cb.cb_nicenum = !parsable;
2847	cb.cb_avl_pool = avl_pool;
2848	cb.cb_avl = avl_tree;
2849	cb.cb_sid2posix = sid2posix;
2850
2851	for (i = 0; i < USFIELD_LAST; i++)
2852		cb.cb_width[i] = strlen(gettext(us_field_hdr[i]));
2853
2854	for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
2855		if (((p == ZFS_PROP_USERUSED || p == ZFS_PROP_USERQUOTA) &&
2856		    !(types & (USTYPE_PSX_USR | USTYPE_SMB_USR))) ||
2857		    ((p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) &&
2858		    !(types & (USTYPE_PSX_GRP | USTYPE_SMB_GRP))))
2859			continue;
2860		cb.cb_prop = p;
2861		if ((ret = zfs_userspace(zhp, p, userspace_cb, &cb)) != 0)
2862			return (ret);
2863	}
2864
2865	/* Sort the list */
2866	if ((node = uu_avl_first(avl_tree)) == NULL)
2867		return (0);
2868
2869	us_populated = B_TRUE;
2870
2871	listpool = uu_list_pool_create("tmplist", sizeof (us_node_t),
2872	    offsetof(us_node_t, usn_listnode), NULL, UU_DEFAULT);
2873	list = uu_list_create(listpool, NULL, UU_DEFAULT);
2874	uu_list_node_init(node, &node->usn_listnode, listpool);
2875
2876	while (node != NULL) {
2877		rmnode = node;
2878		node = uu_avl_next(avl_tree, node);
2879		uu_avl_remove(avl_tree, rmnode);
2880		if (uu_list_find(list, rmnode, NULL, &idx2) == NULL)
2881			uu_list_insert(list, rmnode, idx2);
2882	}
2883
2884	for (node = uu_list_first(list); node != NULL;
2885	    node = uu_list_next(list, node)) {
2886		us_sort_info_t sortinfo = { sortcol, cb.cb_numname };
2887
2888		if (uu_avl_find(avl_tree, node, &sortinfo, &idx) == NULL)
2889			uu_avl_insert(avl_tree, node, idx);
2890	}
2891
2892	uu_list_destroy(list);
2893	uu_list_pool_destroy(listpool);
2894
2895	/* Print and free node nvlist memory */
2896	print_us(scripted, parsable, fields, types, cb.cb_width, B_TRUE,
2897	    cb.cb_avl);
2898
2899	zfs_free_sort_columns(sortcol);
2900
2901	/* Clean up the AVL tree */
2902	if ((walk = uu_avl_walk_start(cb.cb_avl, UU_WALK_ROBUST)) == NULL)
2903		nomem();
2904
2905	while ((node = uu_avl_walk_next(walk)) != NULL) {
2906		uu_avl_remove(cb.cb_avl, node);
2907		free(node);
2908	}
2909
2910	uu_avl_walk_end(walk);
2911	uu_avl_destroy(avl_tree);
2912	uu_avl_pool_destroy(avl_pool);
2913
2914	return (ret);
2915}
2916
2917/*
2918 * list [-Hp][-r|-d max] [-o property[,...]] [-s property] ... [-S property] ...
2919 *      [-t type[,...]] [filesystem|volume|snapshot] ...
2920 *
2921 *	-H	Scripted mode; elide headers and separate columns by tabs.
2922 *	-p	Display values in parsable (literal) format.
2923 *	-r	Recurse over all children.
2924 *	-d	Limit recursion by depth.
2925 *	-o	Control which fields to display.
2926 *	-s	Specify sort columns, descending order.
2927 *	-S	Specify sort columns, ascending order.
2928 *	-t	Control which object types to display.
2929 *
2930 * When given no arguments, list all filesystems in the system.
2931 * Otherwise, list the specified datasets, optionally recursing down them if
2932 * '-r' is specified.
2933 */
2934typedef struct list_cbdata {
2935	boolean_t	cb_first;
2936	boolean_t	cb_literal;
2937	boolean_t	cb_scripted;
2938	zprop_list_t	*cb_proplist;
2939} list_cbdata_t;
2940
2941/*
2942 * Given a list of columns to display, output appropriate headers for each one.
2943 */
2944static void
2945print_header(list_cbdata_t *cb)
2946{
2947	zprop_list_t *pl = cb->cb_proplist;
2948	char headerbuf[ZFS_MAXPROPLEN];
2949	const char *header;
2950	int i;
2951	boolean_t first = B_TRUE;
2952	boolean_t right_justify;
2953
2954	for (; pl != NULL; pl = pl->pl_next) {
2955		if (!first) {
2956			(void) printf("  ");
2957		} else {
2958			first = B_FALSE;
2959		}
2960
2961		right_justify = B_FALSE;
2962		if (pl->pl_prop != ZPROP_INVAL) {
2963			header = zfs_prop_column_name(pl->pl_prop);
2964			right_justify = zfs_prop_align_right(pl->pl_prop);
2965		} else {
2966			for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
2967				headerbuf[i] = toupper(pl->pl_user_prop[i]);
2968			headerbuf[i] = '\0';
2969			header = headerbuf;
2970		}
2971
2972		if (pl->pl_next == NULL && !right_justify)
2973			(void) printf("%s", header);
2974		else if (right_justify)
2975			(void) printf("%*s", pl->pl_width, header);
2976		else
2977			(void) printf("%-*s", pl->pl_width, header);
2978	}
2979
2980	(void) printf("\n");
2981}
2982
2983/*
2984 * Given a dataset and a list of fields, print out all the properties according
2985 * to the described layout.
2986 */
2987static void
2988print_dataset(zfs_handle_t *zhp, list_cbdata_t *cb)
2989{
2990	zprop_list_t *pl = cb->cb_proplist;
2991	boolean_t first = B_TRUE;
2992	char property[ZFS_MAXPROPLEN];
2993	nvlist_t *userprops = zfs_get_user_props(zhp);
2994	nvlist_t *propval;
2995	char *propstr;
2996	boolean_t right_justify;
2997
2998	for (; pl != NULL; pl = pl->pl_next) {
2999		if (!first) {
3000			if (cb->cb_scripted)
3001				(void) printf("\t");
3002			else
3003				(void) printf("  ");
3004		} else {
3005			first = B_FALSE;
3006		}
3007
3008		if (pl->pl_prop == ZFS_PROP_NAME) {
3009			(void) strlcpy(property, zfs_get_name(zhp),
3010			    sizeof (property));
3011			propstr = property;
3012			right_justify = zfs_prop_align_right(pl->pl_prop);
3013		} else if (pl->pl_prop != ZPROP_INVAL) {
3014			if (zfs_prop_get(zhp, pl->pl_prop, property,
3015			    sizeof (property), NULL, NULL, 0,
3016			    cb->cb_literal) != 0)
3017				propstr = "-";
3018			else
3019				propstr = property;
3020			right_justify = zfs_prop_align_right(pl->pl_prop);
3021		} else if (zfs_prop_userquota(pl->pl_user_prop)) {
3022			if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
3023			    property, sizeof (property), cb->cb_literal) != 0)
3024				propstr = "-";
3025			else
3026				propstr = property;
3027			right_justify = B_TRUE;
3028		} else if (zfs_prop_written(pl->pl_user_prop)) {
3029			if (zfs_prop_get_written(zhp, pl->pl_user_prop,
3030			    property, sizeof (property), cb->cb_literal) != 0)
3031				propstr = "-";
3032			else
3033				propstr = property;
3034			right_justify = B_TRUE;
3035		} else {
3036			if (nvlist_lookup_nvlist(userprops,
3037			    pl->pl_user_prop, &propval) != 0)
3038				propstr = "-";
3039			else
3040				verify(nvlist_lookup_string(propval,
3041				    ZPROP_VALUE, &propstr) == 0);
3042			right_justify = B_FALSE;
3043		}
3044
3045		/*
3046		 * If this is being called in scripted mode, or if this is the
3047		 * last column and it is left-justified, don't include a width
3048		 * format specifier.
3049		 */
3050		if (cb->cb_scripted || (pl->pl_next == NULL && !right_justify))
3051			(void) printf("%s", propstr);
3052		else if (right_justify)
3053			(void) printf("%*s", pl->pl_width, propstr);
3054		else
3055			(void) printf("%-*s", pl->pl_width, propstr);
3056	}
3057
3058	(void) printf("\n");
3059}
3060
3061/*
3062 * Generic callback function to list a dataset or snapshot.
3063 */
3064static int
3065list_callback(zfs_handle_t *zhp, void *data)
3066{
3067	list_cbdata_t *cbp = data;
3068
3069	if (cbp->cb_first) {
3070		if (!cbp->cb_scripted)
3071			print_header(cbp);
3072		cbp->cb_first = B_FALSE;
3073	}
3074
3075	print_dataset(zhp, cbp);
3076
3077	return (0);
3078}
3079
3080static int
3081zfs_do_list(int argc, char **argv)
3082{
3083	int c;
3084	static char default_fields[] =
3085	    "name,used,available,referenced,mountpoint";
3086	int types = ZFS_TYPE_DATASET;
3087	boolean_t types_specified = B_FALSE;
3088	char *fields = NULL;
3089	list_cbdata_t cb = { 0 };
3090	char *value;
3091	int limit = 0;
3092	int ret = 0;
3093	zfs_sort_column_t *sortcol = NULL;
3094	int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
3095
3096	/* check options */
3097	while ((c = getopt(argc, argv, "HS:d:o:prs:t:")) != -1) {
3098		switch (c) {
3099		case 'o':
3100			fields = optarg;
3101			break;
3102		case 'p':
3103			cb.cb_literal = B_TRUE;
3104			flags |= ZFS_ITER_LITERAL_PROPS;
3105			break;
3106		case 'd':
3107			limit = parse_depth(optarg, &flags);
3108			break;
3109		case 'r':
3110			flags |= ZFS_ITER_RECURSE;
3111			break;
3112		case 'H':
3113			cb.cb_scripted = B_TRUE;
3114			break;
3115		case 's':
3116			if (zfs_add_sort_column(&sortcol, optarg,
3117			    B_FALSE) != 0) {
3118				(void) fprintf(stderr,
3119				    gettext("invalid property '%s'\n"), optarg);
3120				usage(B_FALSE);
3121			}
3122			break;
3123		case 'S':
3124			if (zfs_add_sort_column(&sortcol, optarg,
3125			    B_TRUE) != 0) {
3126				(void) fprintf(stderr,
3127				    gettext("invalid property '%s'\n"), optarg);
3128				usage(B_FALSE);
3129			}
3130			break;
3131		case 't':
3132			types = 0;
3133			types_specified = B_TRUE;
3134			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
3135			while (*optarg != '\0') {
3136				static char *type_subopts[] = { "filesystem",
3137				    "volume", "snapshot", "snap", "bookmark",
3138				    "all", NULL };
3139
3140				switch (getsubopt(&optarg, type_subopts,
3141				    &value)) {
3142				case 0:
3143					types |= ZFS_TYPE_FILESYSTEM;
3144					break;
3145				case 1:
3146					types |= ZFS_TYPE_VOLUME;
3147					break;
3148				case 2:
3149				case 3:
3150					types |= ZFS_TYPE_SNAPSHOT;
3151					break;
3152				case 4:
3153					types |= ZFS_TYPE_BOOKMARK;
3154					break;
3155				case 5:
3156					types = ZFS_TYPE_DATASET |
3157					    ZFS_TYPE_BOOKMARK;
3158					break;
3159				default:
3160					(void) fprintf(stderr,
3161					    gettext("invalid type '%s'\n"),
3162					    suboptarg);
3163					usage(B_FALSE);
3164				}
3165			}
3166			break;
3167		case ':':
3168			(void) fprintf(stderr, gettext("missing argument for "
3169			    "'%c' option\n"), optopt);
3170			usage(B_FALSE);
3171			break;
3172		case '?':
3173			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3174			    optopt);
3175			usage(B_FALSE);
3176		}
3177	}
3178
3179	argc -= optind;
3180	argv += optind;
3181
3182	if (fields == NULL)
3183		fields = default_fields;
3184
3185	/*
3186	 * If we are only going to list snapshot names and sort by name,
3187	 * then we can use faster version.
3188	 */
3189	if (strcmp(fields, "name") == 0 && zfs_sort_only_by_name(sortcol))
3190		flags |= ZFS_ITER_SIMPLE;
3191
3192	/*
3193	 * If "-o space" and no types were specified, don't display snapshots.
3194	 */
3195	if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
3196		types &= ~ZFS_TYPE_SNAPSHOT;
3197
3198	/*
3199	 * If the user specifies '-o all', the zprop_get_list() doesn't
3200	 * normally include the name of the dataset.  For 'zfs list', we always
3201	 * want this property to be first.
3202	 */
3203	if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
3204	    != 0)
3205		usage(B_FALSE);
3206
3207	cb.cb_first = B_TRUE;
3208
3209	ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
3210	    limit, list_callback, &cb);
3211
3212	zprop_free_list(cb.cb_proplist);
3213	zfs_free_sort_columns(sortcol);
3214
3215	if (ret == 0 && cb.cb_first && !cb.cb_scripted)
3216		(void) printf(gettext("no datasets available\n"));
3217
3218	return (ret);
3219}
3220
3221/*
3222 * zfs rename [-f] <fs | snap | vol> <fs | snap | vol>
3223 * zfs rename [-f] -p <fs | vol> <fs | vol>
3224 * zfs rename -r <snap> <snap>
3225 * zfs rename -u [-p] <fs> <fs>
3226 *
3227 * Renames the given dataset to another of the same type.
3228 *
3229 * The '-p' flag creates all the non-existing ancestors of the target first.
3230 */
3231/* ARGSUSED */
3232static int
3233zfs_do_rename(int argc, char **argv)
3234{
3235	zfs_handle_t *zhp;
3236	renameflags_t flags = { 0 };
3237	int c;
3238	int ret = 0;
3239	int types;
3240	boolean_t parents = B_FALSE;
3241	char *snapshot = NULL;
3242
3243	/* check options */
3244	while ((c = getopt(argc, argv, "fpru")) != -1) {
3245		switch (c) {
3246		case 'p':
3247			parents = B_TRUE;
3248			break;
3249		case 'r':
3250			flags.recurse = B_TRUE;
3251			break;
3252		case 'u':
3253			flags.nounmount = B_TRUE;
3254			break;
3255		case 'f':
3256			flags.forceunmount = B_TRUE;
3257			break;
3258		case '?':
3259		default:
3260			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3261			    optopt);
3262			usage(B_FALSE);
3263		}
3264	}
3265
3266	argc -= optind;
3267	argv += optind;
3268
3269	/* check number of arguments */
3270	if (argc < 1) {
3271		(void) fprintf(stderr, gettext("missing source dataset "
3272		    "argument\n"));
3273		usage(B_FALSE);
3274	}
3275	if (argc < 2) {
3276		(void) fprintf(stderr, gettext("missing target dataset "
3277		    "argument\n"));
3278		usage(B_FALSE);
3279	}
3280	if (argc > 2) {
3281		(void) fprintf(stderr, gettext("too many arguments\n"));
3282		usage(B_FALSE);
3283	}
3284
3285	if (flags.recurse && parents) {
3286		(void) fprintf(stderr, gettext("-p and -r options are mutually "
3287		    "exclusive\n"));
3288		usage(B_FALSE);
3289	}
3290
3291	if (flags.recurse && strchr(argv[0], '@') == 0) {
3292		(void) fprintf(stderr, gettext("source dataset for recursive "
3293		    "rename must be a snapshot\n"));
3294		usage(B_FALSE);
3295	}
3296
3297	if (flags.nounmount && parents) {
3298		(void) fprintf(stderr, gettext("-u and -p options are mutually "
3299		    "exclusive\n"));
3300		usage(B_FALSE);
3301	}
3302
3303	if (flags.nounmount)
3304		types = ZFS_TYPE_FILESYSTEM;
3305	else if (parents)
3306		types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3307	else
3308		types = ZFS_TYPE_DATASET;
3309
3310	if (flags.recurse) {
3311		/*
3312		 * When we do recursive rename we are fine when the given
3313		 * snapshot for the given dataset doesn't exist - it can
3314		 * still exists below.
3315		 */
3316
3317		snapshot = strchr(argv[0], '@');
3318		assert(snapshot != NULL);
3319		*snapshot = '\0';
3320		snapshot++;
3321	}
3322
3323	if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3324		return (1);
3325
3326	/* If we were asked and the name looks good, try to create ancestors. */
3327	if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
3328	    zfs_create_ancestors(g_zfs, argv[1]) != 0) {
3329		zfs_close(zhp);
3330		return (1);
3331	}
3332
3333	ret = (zfs_rename(zhp, snapshot, argv[1], flags) != 0);
3334
3335	zfs_close(zhp);
3336	return (ret);
3337}
3338
3339/*
3340 * zfs promote <fs>
3341 *
3342 * Promotes the given clone fs to be the parent
3343 */
3344/* ARGSUSED */
3345static int
3346zfs_do_promote(int argc, char **argv)
3347{
3348	zfs_handle_t *zhp;
3349	int ret = 0;
3350
3351	/* check options */
3352	if (argc > 1 && argv[1][0] == '-') {
3353		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3354		    argv[1][1]);
3355		usage(B_FALSE);
3356	}
3357
3358	/* check number of arguments */
3359	if (argc < 2) {
3360		(void) fprintf(stderr, gettext("missing clone filesystem"
3361		    " argument\n"));
3362		usage(B_FALSE);
3363	}
3364	if (argc > 2) {
3365		(void) fprintf(stderr, gettext("too many arguments\n"));
3366		usage(B_FALSE);
3367	}
3368
3369	zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3370	if (zhp == NULL)
3371		return (1);
3372
3373	ret = (zfs_promote(zhp) != 0);
3374
3375
3376	zfs_close(zhp);
3377	return (ret);
3378}
3379
3380/*
3381 * zfs rollback [-rRf] <snapshot>
3382 *
3383 *	-r	Delete any intervening snapshots before doing rollback
3384 *	-R	Delete any snapshots and their clones
3385 *	-f	ignored for backwards compatability
3386 *
3387 * Given a filesystem, rollback to a specific snapshot, discarding any changes
3388 * since then and making it the active dataset.  If more recent snapshots exist,
3389 * the command will complain unless the '-r' flag is given.
3390 */
3391typedef struct rollback_cbdata {
3392	uint64_t	cb_create;
3393	boolean_t	cb_first;
3394	int		cb_doclones;
3395	char		*cb_target;
3396	int		cb_error;
3397	boolean_t	cb_recurse;
3398} rollback_cbdata_t;
3399
3400static int
3401rollback_check_dependent(zfs_handle_t *zhp, void *data)
3402{
3403	rollback_cbdata_t *cbp = data;
3404
3405	if (cbp->cb_first && cbp->cb_recurse) {
3406		(void) fprintf(stderr, gettext("cannot rollback to "
3407		    "'%s': clones of previous snapshots exist\n"),
3408		    cbp->cb_target);
3409		(void) fprintf(stderr, gettext("use '-R' to "
3410		    "force deletion of the following clones and "
3411		    "dependents:\n"));
3412		cbp->cb_first = 0;
3413		cbp->cb_error = 1;
3414	}
3415
3416	(void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
3417
3418	zfs_close(zhp);
3419	return (0);
3420}
3421
3422/*
3423 * Report any snapshots more recent than the one specified.  Used when '-r' is
3424 * not specified.  We reuse this same callback for the snapshot dependents - if
3425 * 'cb_dependent' is set, then this is a dependent and we should report it
3426 * without checking the transaction group.
3427 */
3428static int
3429rollback_check(zfs_handle_t *zhp, void *data)
3430{
3431	rollback_cbdata_t *cbp = data;
3432
3433	if (cbp->cb_doclones) {
3434		zfs_close(zhp);
3435		return (0);
3436	}
3437
3438	if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3439		if (cbp->cb_first && !cbp->cb_recurse) {
3440			(void) fprintf(stderr, gettext("cannot "
3441			    "rollback to '%s': more recent snapshots "
3442			    "or bookmarks exist\n"),
3443			    cbp->cb_target);
3444			(void) fprintf(stderr, gettext("use '-r' to "
3445			    "force deletion of the following "
3446			    "snapshots and bookmarks:\n"));
3447			cbp->cb_first = 0;
3448			cbp->cb_error = 1;
3449		}
3450
3451		if (cbp->cb_recurse) {
3452			if (zfs_iter_dependents(zhp, B_TRUE,
3453			    rollback_check_dependent, cbp) != 0) {
3454				zfs_close(zhp);
3455				return (-1);
3456			}
3457		} else {
3458			(void) fprintf(stderr, "%s\n",
3459			    zfs_get_name(zhp));
3460		}
3461	}
3462	zfs_close(zhp);
3463	return (0);
3464}
3465
3466static int
3467zfs_do_rollback(int argc, char **argv)
3468{
3469	int ret = 0;
3470	int c;
3471	boolean_t force = B_FALSE;
3472	rollback_cbdata_t cb = { 0 };
3473	zfs_handle_t *zhp, *snap;
3474	char parentname[ZFS_MAXNAMELEN];
3475	char *delim;
3476
3477	/* check options */
3478	while ((c = getopt(argc, argv, "rRf")) != -1) {
3479		switch (c) {
3480		case 'r':
3481			cb.cb_recurse = 1;
3482			break;
3483		case 'R':
3484			cb.cb_recurse = 1;
3485			cb.cb_doclones = 1;
3486			break;
3487		case 'f':
3488			force = B_TRUE;
3489			break;
3490		case '?':
3491			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3492			    optopt);
3493			usage(B_FALSE);
3494		}
3495	}
3496
3497	argc -= optind;
3498	argv += optind;
3499
3500	/* check number of arguments */
3501	if (argc < 1) {
3502		(void) fprintf(stderr, gettext("missing dataset argument\n"));
3503		usage(B_FALSE);
3504	}
3505	if (argc > 1) {
3506		(void) fprintf(stderr, gettext("too many arguments\n"));
3507		usage(B_FALSE);
3508	}
3509
3510	/* open the snapshot */
3511	if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
3512		return (1);
3513
3514	/* open the parent dataset */
3515	(void) strlcpy(parentname, argv[0], sizeof (parentname));
3516	verify((delim = strrchr(parentname, '@')) != NULL);
3517	*delim = '\0';
3518	if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
3519		zfs_close(snap);
3520		return (1);
3521	}
3522
3523	/*
3524	 * Check for more recent snapshots and/or clones based on the presence
3525	 * of '-r' and '-R'.
3526	 */
3527	cb.cb_target = argv[0];
3528	cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3529	cb.cb_first = B_TRUE;
3530	cb.cb_error = 0;
3531	if ((ret = zfs_iter_snapshots(zhp, B_FALSE, rollback_check, &cb)) != 0)
3532		goto out;
3533	if ((ret = zfs_iter_bookmarks(zhp, rollback_check, &cb)) != 0)
3534		goto out;
3535
3536	if ((ret = cb.cb_error) != 0)
3537		goto out;
3538
3539	/*
3540	 * Rollback parent to the given snapshot.
3541	 */
3542	ret = zfs_rollback(zhp, snap, force);
3543
3544out:
3545	zfs_close(snap);
3546	zfs_close(zhp);
3547
3548	if (ret == 0)
3549		return (0);
3550	else
3551		return (1);
3552}
3553
3554/*
3555 * zfs set property=value ... { fs | snap | vol } ...
3556 *
3557 * Sets the given properties for all datasets specified on the command line.
3558 */
3559
3560static int
3561set_callback(zfs_handle_t *zhp, void *data)
3562{
3563	nvlist_t *props = data;
3564
3565	if (zfs_prop_set_list(zhp, props) != 0) {
3566		switch (libzfs_errno(g_zfs)) {
3567		case EZFS_MOUNTFAILED:
3568			(void) fprintf(stderr, gettext("property may be set "
3569			    "but unable to remount filesystem\n"));
3570			break;
3571		case EZFS_SHARENFSFAILED:
3572			(void) fprintf(stderr, gettext("property may be set "
3573			    "but unable to reshare filesystem\n"));
3574			break;
3575		}
3576		return (1);
3577	}
3578	return (0);
3579}
3580
3581static int
3582zfs_do_set(int argc, char **argv)
3583{
3584	nvlist_t *props = NULL;
3585	int ds_start = -1; /* argv idx of first dataset arg */
3586	int i, ret = 0;
3587
3588	/* check for options */
3589	if (argc > 1 && argv[1][0] == '-') {
3590		(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3591		    argv[1][1]);
3592		usage(B_FALSE);
3593	}
3594
3595	/* check number of arguments */
3596	if (argc < 2) {
3597		(void) fprintf(stderr, gettext("missing arguments\n"));
3598		usage(B_FALSE);
3599	}
3600	if (argc < 3) {
3601		if (strchr(argv[1], '=') == NULL) {
3602			(void) fprintf(stderr, gettext("missing property=value "
3603			    "argument(s)\n"));
3604		} else {
3605			(void) fprintf(stderr, gettext("missing dataset "
3606			    "name(s)\n"));
3607		}
3608		usage(B_FALSE);
3609	}
3610
3611	/* validate argument order:  prop=val args followed by dataset args */
3612	for (i = 1; i < argc; i++) {
3613		if (strchr(argv[i], '=') != NULL) {
3614			if (ds_start > 0) {
3615				/* out-of-order prop=val argument */
3616				(void) fprintf(stderr, gettext("invalid "
3617				    "argument order\n"), i);
3618				usage(B_FALSE);
3619			}
3620		} else if (ds_start < 0) {
3621			ds_start = i;
3622		}
3623	}
3624	if (ds_start < 0) {
3625		(void) fprintf(stderr, gettext("missing dataset name(s)\n"));
3626		usage(B_FALSE);
3627	}
3628
3629	/* Populate a list of property settings */
3630	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3631		nomem();
3632	for (i = 1; i < ds_start; i++) {
3633		if ((ret = parseprop(props, argv[i])) != 0)
3634			goto error;
3635	}
3636
3637	ret = zfs_for_each(argc - ds_start, argv + ds_start, 0,
3638	    ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, props);
3639
3640error:
3641	nvlist_free(props);
3642	return (ret);
3643}
3644
3645typedef struct snap_cbdata {
3646	nvlist_t *sd_nvl;
3647	boolean_t sd_recursive;
3648	const char *sd_snapname;
3649} snap_cbdata_t;
3650
3651static int
3652zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3653{
3654	snap_cbdata_t *sd = arg;
3655	char *name;
3656	int rv = 0;
3657	int error;
3658
3659	if (sd->sd_recursive &&
3660	    zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) != 0) {
3661		zfs_close(zhp);
3662		return (0);
3663	}
3664
3665	error = asprintf(&name, "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3666	if (error == -1)
3667		nomem();
3668	fnvlist_add_boolean(sd->sd_nvl, name);
3669	free(name);
3670
3671	if (sd->sd_recursive)
3672		rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3673	zfs_close(zhp);
3674	return (rv);
3675}
3676
3677/*
3678 * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
3679 *
3680 * Creates a snapshot with the given name.  While functionally equivalent to
3681 * 'zfs create', it is a separate command to differentiate intent.
3682 */
3683static int
3684zfs_do_snapshot(int argc, char **argv)
3685{
3686	int ret = 0;
3687	int c;
3688	nvlist_t *props;
3689	snap_cbdata_t sd = { 0 };
3690	boolean_t multiple_snaps = B_FALSE;
3691
3692	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3693		nomem();
3694	if (nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) != 0)
3695		nomem();
3696
3697	/* check options */
3698	while ((c = getopt(argc, argv, "ro:")) != -1) {
3699		switch (c) {
3700		case 'o':
3701			if (parseprop(props, optarg) != 0)
3702				return (1);
3703			break;
3704		case 'r':
3705			sd.sd_recursive = B_TRUE;
3706			multiple_snaps = B_TRUE;
3707			break;
3708		case '?':
3709			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3710			    optopt);
3711			goto usage;
3712		}
3713	}
3714
3715	argc -= optind;
3716	argv += optind;
3717
3718	/* check number of arguments */
3719	if (argc < 1) {
3720		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
3721		goto usage;
3722	}
3723
3724	if (argc > 1)
3725		multiple_snaps = B_TRUE;
3726	for (; argc > 0; argc--, argv++) {
3727		char *atp;
3728		zfs_handle_t *zhp;
3729
3730		atp = strchr(argv[0], '@');
3731		if (atp == NULL)
3732			goto usage;
3733		*atp = '\0';
3734		sd.sd_snapname = atp + 1;
3735		zhp = zfs_open(g_zfs, argv[0],
3736		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3737		if (zhp == NULL)
3738			goto usage;
3739		if (zfs_snapshot_cb(zhp, &sd) != 0)
3740			goto usage;
3741	}
3742
3743	ret = zfs_snapshot_nvl(g_zfs, sd.sd_nvl, props);
3744	nvlist_free(sd.sd_nvl);
3745	nvlist_free(props);
3746	if (ret != 0 && multiple_snaps)
3747		(void) fprintf(stderr, gettext("no snapshots were created\n"));
3748	return (ret != 0);
3749
3750usage:
3751	nvlist_free(sd.sd_nvl);
3752	nvlist_free(props);
3753	usage(B_FALSE);
3754	return (-1);
3755}
3756
3757/*
3758 * Send a backup stream to stdout.
3759 */
3760static int
3761zfs_do_send(int argc, char **argv)
3762{
3763	char *fromname = NULL;
3764	char *toname = NULL;
3765	char *resume_token = NULL;
3766	char *cp;
3767	zfs_handle_t *zhp;
3768	sendflags_t flags = { 0 };
3769	int c, err;
3770	nvlist_t *dbgnv = NULL;
3771	boolean_t extraverbose = B_FALSE;
3772
3773	/* check options */
3774	while ((c = getopt(argc, argv, ":i:I:RDpvnPLet:")) != -1) {
3775		switch (c) {
3776		case 'i':
3777			if (fromname)
3778				usage(B_FALSE);
3779			fromname = optarg;
3780			break;
3781		case 'I':
3782			if (fromname)
3783				usage(B_FALSE);
3784			fromname = optarg;
3785			flags.doall = B_TRUE;
3786			break;
3787		case 'R':
3788			flags.replicate = B_TRUE;
3789			break;
3790		case 'p':
3791			flags.props = B_TRUE;
3792			break;
3793		case 'P':
3794			flags.parsable = B_TRUE;
3795			flags.verbose = B_TRUE;
3796			break;
3797		case 'v':
3798			if (flags.verbose)
3799				extraverbose = B_TRUE;
3800			flags.verbose = B_TRUE;
3801			flags.progress = B_TRUE;
3802			break;
3803		case 'D':
3804			flags.dedup = B_TRUE;
3805			break;
3806		case 'n':
3807			flags.dryrun = B_TRUE;
3808			break;
3809		case 'L':
3810			flags.largeblock = B_TRUE;
3811			break;
3812		case 'e':
3813			flags.embed_data = B_TRUE;
3814			break;
3815		case 't':
3816			resume_token = optarg;
3817			break;
3818		case ':':
3819			(void) fprintf(stderr, gettext("missing argument for "
3820			    "'%c' option\n"), optopt);
3821			usage(B_FALSE);
3822			break;
3823		case '?':
3824			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
3825			    optopt);
3826			usage(B_FALSE);
3827		}
3828	}
3829
3830	argc -= optind;
3831	argv += optind;
3832
3833	if (resume_token != NULL) {
3834		if (fromname != NULL || flags.replicate || flags.props ||
3835		    flags.dedup) {
3836			(void) fprintf(stderr,
3837			    gettext("invalid flags combined with -t\n"));
3838			usage(B_FALSE);
3839		}
3840		if (argc != 0) {
3841			(void) fprintf(stderr, gettext("no additional "
3842			    "arguments are permitted with -t\n"));
3843			usage(B_FALSE);
3844		}
3845	} else {
3846		if (argc < 1) {
3847			(void) fprintf(stderr,
3848			    gettext("missing snapshot argument\n"));
3849			usage(B_FALSE);
3850		}
3851		if (argc > 1) {
3852			(void) fprintf(stderr, gettext("too many arguments\n"));
3853			usage(B_FALSE);
3854		}
3855	}
3856
3857	if (!flags.dryrun && isatty(STDOUT_FILENO)) {
3858		(void) fprintf(stderr,
3859		    gettext("Error: Stream can not be written to a terminal.\n"
3860		    "You must redirect standard output.\n"));
3861		return (1);
3862	}
3863
3864	if (resume_token != NULL) {
3865		return (zfs_send_resume(g_zfs, &flags, STDOUT_FILENO,
3866		    resume_token));
3867	}
3868
3869	/*
3870	 * Special case sending a filesystem, or from a bookmark.
3871	 */
3872	if (strchr(argv[0], '@') == NULL ||
3873	    (fromname && strchr(fromname, '#') != NULL)) {
3874		char frombuf[ZFS_MAXNAMELEN];
3875		enum lzc_send_flags lzc_flags = 0;
3876
3877		if (flags.replicate || flags.doall || flags.props ||
3878		    flags.dedup || flags.dryrun || flags.verbose ||
3879		    flags.progress) {
3880			(void) fprintf(stderr,
3881			    gettext("Error: "
3882			    "Unsupported flag with filesystem or bookmark.\n"));
3883			return (1);
3884		}
3885
3886		zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET);
3887		if (zhp == NULL)
3888			return (1);
3889
3890		if (flags.largeblock)
3891			lzc_flags |= LZC_SEND_FLAG_LARGE_BLOCK;
3892		if (flags.embed_data)
3893			lzc_flags |= LZC_SEND_FLAG_EMBED_DATA;
3894
3895		if (fromname != NULL &&
3896		    (fromname[0] == '#' || fromname[0] == '@')) {
3897			/*
3898			 * Incremental source name begins with # or @.
3899			 * Default to same fs as target.
3900			 */
3901			(void) strncpy(frombuf, argv[0], sizeof (frombuf));
3902			cp = strchr(frombuf, '@');
3903			if (cp != NULL)
3904				*cp = '\0';
3905			(void) strlcat(frombuf, fromname, sizeof (frombuf));
3906			fromname = frombuf;
3907		}
3908		err = zfs_send_one(zhp, fromname, STDOUT_FILENO, lzc_flags);
3909		zfs_close(zhp);
3910		return (err != 0);
3911	}
3912
3913	cp = strchr(argv[0], '@');
3914	*cp = '\0';
3915	toname = cp + 1;
3916	zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3917	if (zhp == NULL)
3918		return (1);
3919
3920	/*
3921	 * If they specified the full path to the snapshot, chop off
3922	 * everything except the short name of the snapshot, but special
3923	 * case if they specify the origin.
3924	 */
3925	if (fromname && (cp = strchr(fromname, '@')) != NULL) {
3926		char origin[ZFS_MAXNAMELEN];
3927		zprop_source_t src;
3928
3929		(void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
3930		    origin, sizeof (origin), &src, NULL, 0, B_FALSE);
3931
3932		if (strcmp(origin, fromname) == 0) {
3933			fromname = NULL;
3934			flags.fromorigin = B_TRUE;
3935		} else {
3936			*cp = '\0';
3937			if (cp != fromname && strcmp(argv[0], fromname)) {
3938				(void) fprintf(stderr,
3939				    gettext("incremental source must be "
3940				    "in same filesystem\n"));
3941				usage(B_FALSE);
3942			}
3943			fromname = cp + 1;
3944			if (strchr(fromname, '@') || strchr(fromname, '/')) {
3945				(void) fprintf(stderr,
3946				    gettext("invalid incremental source\n"));
3947				usage(B_FALSE);
3948			}
3949		}
3950	}
3951
3952	if (flags.replicate && fromname == NULL)
3953		flags.doall = B_TRUE;
3954
3955	err = zfs_send(zhp, fromname, toname, &flags, STDOUT_FILENO, NULL, 0,
3956	    extraverbose ? &dbgnv : NULL);
3957
3958	if (extraverbose && dbgnv != NULL) {
3959		/*
3960		 * dump_nvlist prints to stdout, but that's been
3961		 * redirected to a file.  Make it print to stderr
3962		 * instead.
3963		 */
3964		(void) dup2(STDERR_FILENO, STDOUT_FILENO);
3965		dump_nvlist(dbgnv, 0);
3966		nvlist_free(dbgnv);
3967	}
3968	zfs_close(zhp);
3969
3970	return (err != 0);
3971}
3972
3973/*
3974 * Restore a backup stream from stdin.
3975 */
3976static int
3977zfs_do_receive(int argc, char **argv)
3978{
3979	int c, err = 0;
3980	recvflags_t flags = { 0 };
3981	boolean_t abort_resumable = B_FALSE;
3982
3983	nvlist_t *props;
3984	nvpair_t *nvp = NULL;
3985
3986	if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3987		nomem();
3988
3989	/* check options */
3990	while ((c = getopt(argc, argv, ":o:denuvFsA")) != -1) {
3991		switch (c) {
3992		case 'o':
3993			if (parseprop(props, optarg) != 0)
3994				return (1);
3995			break;
3996		case 'd':
3997			flags.isprefix = B_TRUE;
3998			break;
3999		case 'e':
4000			flags.isprefix = B_TRUE;
4001			flags.istail = B_TRUE;
4002			break;
4003		case 'n':
4004			flags.dryrun = B_TRUE;
4005			break;
4006		case 'u':
4007			flags.nomount = B_TRUE;
4008			break;
4009		case 'v':
4010			flags.verbose = B_TRUE;
4011			break;
4012		case 's':
4013			flags.resumable = B_TRUE;
4014			break;
4015		case 'F':
4016			flags.force = B_TRUE;
4017			break;
4018		case 'A':
4019			abort_resumable = B_TRUE;
4020			break;
4021		case ':':
4022			(void) fprintf(stderr, gettext("missing argument for "
4023			    "'%c' option\n"), optopt);
4024			usage(B_FALSE);
4025			break;
4026		case '?':
4027			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
4028			    optopt);
4029			usage(B_FALSE);
4030		}
4031	}
4032
4033	argc -= optind;
4034	argv += optind;
4035
4036	/* check number of arguments */
4037	if (argc < 1) {
4038		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
4039		usage(B_FALSE);
4040	}
4041	if (argc > 1) {
4042		(void) fprintf(stderr, gettext("too many arguments\n"));
4043		usage(B_FALSE);
4044	}
4045
4046	while ((nvp = nvlist_next_nvpair(props, nvp))) {
4047		if (strcmp(nvpair_name(nvp), "origin") != 0) {
4048			(void) fprintf(stderr, gettext("invalid option"));
4049			usage(B_FALSE);
4050		}
4051	}
4052
4053	if (abort_resumable) {
4054		if (flags.isprefix || flags.istail || flags.dryrun ||
4055		    flags.resumable || flags.nomount) {
4056			(void) fprintf(stderr, gettext("invalid option"));
4057			usage(B_FALSE);
4058		}
4059
4060		char namebuf[ZFS_MAXNAMELEN];
4061		(void) snprintf(namebuf, sizeof (namebuf),
4062		    "%s/%%recv", argv[0]);
4063
4064		if (zfs_dataset_exists(g_zfs, namebuf,
4065		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) {
4066			zfs_handle_t *zhp = zfs_open(g_zfs,
4067			    namebuf, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
4068			if (zhp == NULL)
4069				return (1);
4070			err = zfs_destroy(zhp, B_FALSE);
4071		} else {
4072			zfs_handle_t *zhp = zfs_open(g_zfs,
4073			    argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
4074			if (zhp == NULL)
4075				usage(B_FALSE);
4076			if (!zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) ||
4077			    zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
4078			    NULL, 0, NULL, NULL, 0, B_TRUE) == -1) {
4079				(void) fprintf(stderr,
4080				    gettext("'%s' does not have any "
4081				    "resumable receive state to abort\n"),
4082				    argv[0]);
4083				return (1);
4084			}
4085			err = zfs_destroy(zhp, B_FALSE);
4086		}
4087
4088		return (err != 0);
4089	}
4090
4091	if (isatty(STDIN_FILENO)) {
4092		(void) fprintf(stderr,
4093		    gettext("Error: Backup stream can not be read "
4094		    "from a terminal.\n"
4095		    "You must redirect standard input.\n"));
4096		return (1);
4097	}
4098	err = zfs_receive(g_zfs, argv[0], props, &flags, STDIN_FILENO, NULL);
4099
4100	return (err != 0);
4101}
4102
4103/*
4104 * allow/unallow stuff
4105 */
4106/* copied from zfs/sys/dsl_deleg.h */
4107#define	ZFS_DELEG_PERM_CREATE		"create"
4108#define	ZFS_DELEG_PERM_DESTROY		"destroy"
4109#define	ZFS_DELEG_PERM_SNAPSHOT		"snapshot"
4110#define	ZFS_DELEG_PERM_ROLLBACK		"rollback"
4111#define	ZFS_DELEG_PERM_CLONE		"clone"
4112#define	ZFS_DELEG_PERM_PROMOTE		"promote"
4113#define	ZFS_DELEG_PERM_RENAME		"rename"
4114#define	ZFS_DELEG_PERM_MOUNT		"mount"
4115#define	ZFS_DELEG_PERM_SHARE		"share"
4116#define	ZFS_DELEG_PERM_SEND		"send"
4117#define	ZFS_DELEG_PERM_RECEIVE		"receive"
4118#define	ZFS_DELEG_PERM_ALLOW		"allow"
4119#define	ZFS_DELEG_PERM_USERPROP		"userprop"
4120#define	ZFS_DELEG_PERM_VSCAN		"vscan" /* ??? */
4121#define	ZFS_DELEG_PERM_USERQUOTA	"userquota"
4122#define	ZFS_DELEG_PERM_GROUPQUOTA	"groupquota"
4123#define	ZFS_DELEG_PERM_USERUSED		"userused"
4124#define	ZFS_DELEG_PERM_GROUPUSED	"groupused"
4125#define	ZFS_DELEG_PERM_HOLD		"hold"
4126#define	ZFS_DELEG_PERM_RELEASE		"release"
4127#define	ZFS_DELEG_PERM_DIFF		"diff"
4128#define	ZFS_DELEG_PERM_BOOKMARK		"bookmark"
4129
4130#define	ZFS_NUM_DELEG_NOTES ZFS_DELEG_NOTE_NONE
4131
4132static zfs_deleg_perm_tab_t zfs_deleg_perm_tbl[] = {
4133	{ ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW },
4134	{ ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
4135	{ ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
4136	{ ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
4137	{ ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
4138	{ ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
4139	{ ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
4140	{ ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
4141	{ ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
4142	{ ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
4143	{ ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
4144	{ ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
4145	{ ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND },
4146	{ ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
4147	{ ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
4148	{ ZFS_DELEG_PERM_BOOKMARK, ZFS_DELEG_NOTE_BOOKMARK },
4149
4150	{ ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
4151	{ ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
4152	{ ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
4153	{ ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
4154	{ ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
4155	{ NULL, ZFS_DELEG_NOTE_NONE }
4156};
4157
4158/* permission structure */
4159typedef struct deleg_perm {
4160	zfs_deleg_who_type_t	dp_who_type;
4161	const char		*dp_name;
4162	boolean_t		dp_local;
4163	boolean_t		dp_descend;
4164} deleg_perm_t;
4165
4166/* */
4167typedef struct deleg_perm_node {
4168	deleg_perm_t		dpn_perm;
4169
4170	uu_avl_node_t		dpn_avl_node;
4171} deleg_perm_node_t;
4172
4173typedef struct fs_perm fs_perm_t;
4174
4175/* permissions set */
4176typedef struct who_perm {
4177	zfs_deleg_who_type_t	who_type;
4178	const char		*who_name;		/* id */
4179	char			who_ug_name[256];	/* user/group name */
4180	fs_perm_t		*who_fsperm;		/* uplink */
4181
4182	uu_avl_t		*who_deleg_perm_avl;	/* permissions */
4183} who_perm_t;
4184
4185/* */
4186typedef struct who_perm_node {
4187	who_perm_t	who_perm;
4188	uu_avl_node_t	who_avl_node;
4189} who_perm_node_t;
4190
4191typedef struct fs_perm_set fs_perm_set_t;
4192/* fs permissions */
4193struct fs_perm {
4194	const char		*fsp_name;
4195
4196	uu_avl_t		*fsp_sc_avl;	/* sets,create */
4197	uu_avl_t		*fsp_uge_avl;	/* user,group,everyone */
4198
4199	fs_perm_set_t		*fsp_set;	/* uplink */
4200};
4201
4202/* */
4203typedef struct fs_perm_node {
4204	fs_perm_t	fspn_fsperm;
4205	uu_avl_t	*fspn_avl;
4206
4207	uu_list_node_t	fspn_list_node;
4208} fs_perm_node_t;
4209
4210/* top level structure */
4211struct fs_perm_set {
4212	uu_list_pool_t	*fsps_list_pool;
4213	uu_list_t	*fsps_list; /* list of fs_perms */
4214
4215	uu_avl_pool_t	*fsps_named_set_avl_pool;
4216	uu_avl_pool_t	*fsps_who_perm_avl_pool;
4217	uu_avl_pool_t	*fsps_deleg_perm_avl_pool;
4218};
4219
4220static inline const char *
4221deleg_perm_type(zfs_deleg_note_t note)
4222{
4223	/* subcommands */
4224	switch (note) {
4225		/* SUBCOMMANDS */
4226		/* OTHER */
4227	case ZFS_DELEG_NOTE_GROUPQUOTA:
4228	case ZFS_DELEG_NOTE_GROUPUSED:
4229	case ZFS_DELEG_NOTE_USERPROP:
4230	case ZFS_DELEG_NOTE_USERQUOTA:
4231	case ZFS_DELEG_NOTE_USERUSED:
4232		/* other */
4233		return (gettext("other"));
4234	default:
4235		return (gettext("subcommand"));
4236	}
4237}
4238
4239static int
4240who_type2weight(zfs_deleg_who_type_t who_type)
4241{
4242	int res;
4243	switch (who_type) {
4244		case ZFS_DELEG_NAMED_SET_SETS:
4245		case ZFS_DELEG_NAMED_SET:
4246			res = 0;
4247			break;
4248		case ZFS_DELEG_CREATE_SETS:
4249		case ZFS_DELEG_CREATE:
4250			res = 1;
4251			break;
4252		case ZFS_DELEG_USER_SETS:
4253		case ZFS_DELEG_USER:
4254			res = 2;
4255			break;
4256		case ZFS_DELEG_GROUP_SETS:
4257		case ZFS_DELEG_GROUP:
4258			res = 3;
4259			break;
4260		case ZFS_DELEG_EVERYONE_SETS:
4261		case ZFS_DELEG_EVERYONE:
4262			res = 4;
4263			break;
4264		default:
4265			res = -1;
4266	}
4267
4268	return (res);
4269}
4270
4271/* ARGSUSED */
4272static int
4273who_perm_compare(const void *larg, const void *rarg, void *unused)
4274{
4275	const who_perm_node_t *l = larg;
4276	const who_perm_node_t *r = rarg;
4277	zfs_deleg_who_type_t ltype = l->who_perm.who_type;
4278	zfs_deleg_who_type_t rtype = r->who_perm.who_type;
4279	int lweight = who_type2weight(ltype);
4280	int rweight = who_type2weight(rtype);
4281	int res = lweight - rweight;
4282	if (res == 0)
4283		res = strncmp(l->who_perm.who_name, r->who_perm.who_name,
4284		    ZFS_MAX_DELEG_NAME-1);
4285
4286	if (res == 0)
4287		return (0);
4288	if (res > 0)
4289		return (1);
4290	else
4291		return (-1);
4292}
4293
4294/* ARGSUSED */
4295static int
4296deleg_perm_compare(const void *larg, const void *rarg, void *unused)
4297{
4298	const deleg_perm_node_t *l = larg;
4299	const deleg_perm_node_t *r = rarg;
4300	int res =  strncmp(l->dpn_perm.dp_name, r->dpn_perm.dp_name,
4301	    ZFS_MAX_DELEG_NAME-1);
4302
4303	if (res == 0)
4304		return (0);
4305
4306	if (res > 0)
4307		return (1);
4308	else
4309		return (-1);
4310}
4311
4312static inline void
4313fs_perm_set_init(fs_perm_set_t *fspset)
4314{
4315	bzero(fspset, sizeof (fs_perm_set_t));
4316
4317	if ((fspset->fsps_list_pool = uu_list_pool_create("fsps_list_pool",
4318	    sizeof (fs_perm_node_t), offsetof(fs_perm_node_t, fspn_list_node),
4319	    NULL, UU_DEFAULT)) == NULL)
4320		nomem();
4321	if ((fspset->fsps_list = uu_list_create(fspset->fsps_list_pool, NULL,
4322	    UU_DEFAULT)) == NULL)
4323		nomem();
4324
4325	if ((fspset->fsps_named_set_avl_pool = uu_avl_pool_create(
4326	    "named_set_avl_pool", sizeof (who_perm_node_t), offsetof(
4327	    who_perm_node_t, who_avl_node), who_perm_compare,
4328	    UU_DEFAULT)) == NULL)
4329		nomem();
4330
4331	if ((fspset->fsps_who_perm_avl_pool = uu_avl_pool_create(
4332	    "who_perm_avl_pool", sizeof (who_perm_node_t), offsetof(
4333	    who_perm_node_t, who_avl_node), who_perm_compare,
4334	    UU_DEFAULT)) == NULL)
4335		nomem();
4336
4337	if ((fspset->fsps_deleg_perm_avl_pool = uu_avl_pool_create(
4338	    "deleg_perm_avl_pool", sizeof (deleg_perm_node_t), offsetof(
4339	    deleg_perm_node_t, dpn_avl_node), deleg_perm_compare, UU_DEFAULT))
4340	    == NULL)
4341		nomem();
4342}
4343
4344static inline void fs_perm_fini(fs_perm_t *);
4345static inline void who_perm_fini(who_perm_t *);
4346
4347static inline void
4348fs_perm_set_fini(fs_perm_set_t *fspset)
4349{
4350	fs_perm_node_t *node = uu_list_first(fspset->fsps_list);
4351
4352	while (node != NULL) {
4353		fs_perm_node_t *next_node =
4354		    uu_list_next(fspset->fsps_list, node);
4355		fs_perm_t *fsperm = &node->fspn_fsperm;
4356		fs_perm_fini(fsperm);
4357		uu_list_remove(fspset->fsps_list, node);
4358		free(node);
4359		node = next_node;
4360	}
4361
4362	uu_avl_pool_destroy(fspset->fsps_named_set_avl_pool);
4363	uu_avl_pool_destroy(fspset->fsps_who_perm_avl_pool);
4364	uu_avl_pool_destroy(fspset->fsps_deleg_perm_avl_pool);
4365}
4366
4367static inline void
4368deleg_perm_init(deleg_perm_t *deleg_perm, zfs_deleg_who_type_t type,
4369    const char *name)
4370{
4371	deleg_perm->dp_who_type = type;
4372	deleg_perm->dp_name = name;
4373}
4374
4375static inline void
4376who_perm_init(who_perm_t *who_perm, fs_perm_t *fsperm,
4377    zfs_deleg_who_type_t type, const char *name)
4378{
4379	uu_avl_pool_t	*pool;
4380	pool = fsperm->fsp_set->fsps_deleg_perm_avl_pool;
4381
4382	bzero(who_perm, sizeof (who_perm_t));
4383
4384	if ((who_perm->who_deleg_perm_avl = uu_avl_create(pool, NULL,
4385	    UU_DEFAULT)) == NULL)
4386		nomem();
4387
4388	who_perm->who_type = type;
4389	who_perm->who_name = name;
4390	who_perm->who_fsperm = fsperm;
4391}
4392
4393static inline void
4394who_perm_fini(who_perm_t *who_perm)
4395{
4396	deleg_perm_node_t *node = uu_avl_first(who_perm->who_deleg_perm_avl);
4397
4398	while (node != NULL) {
4399		deleg_perm_node_t *next_node =
4400		    uu_avl_next(who_perm->who_deleg_perm_avl, node);
4401
4402		uu_avl_remove(who_perm->who_deleg_perm_avl, node);
4403		free(node);
4404		node = next_node;
4405	}
4406
4407	uu_avl_destroy(who_perm->who_deleg_perm_avl);
4408}
4409
4410static inline void
4411fs_perm_init(fs_perm_t *fsperm, fs_perm_set_t *fspset, const char *fsname)
4412{
4413	uu_avl_pool_t	*nset_pool = fspset->fsps_named_set_avl_pool;
4414	uu_avl_pool_t	*who_pool = fspset->fsps_who_perm_avl_pool;
4415
4416	bzero(fsperm, sizeof (fs_perm_t));
4417
4418	if ((fsperm->fsp_sc_avl = uu_avl_create(nset_pool, NULL, UU_DEFAULT))
4419	    == NULL)
4420		nomem();
4421
4422	if ((fsperm->fsp_uge_avl = uu_avl_create(who_pool, NULL, UU_DEFAULT))
4423	    == NULL)
4424		nomem();
4425
4426	fsperm->fsp_set = fspset;
4427	fsperm->fsp_name = fsname;
4428}
4429
4430static inline void
4431fs_perm_fini(fs_perm_t *fsperm)
4432{
4433	who_perm_node_t *node = uu_avl_first(fsperm->fsp_sc_avl);
4434	while (node != NULL) {
4435		who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_sc_avl,
4436		    node);
4437		who_perm_t *who_perm = &node->who_perm;
4438		who_perm_fini(who_perm);
4439		uu_avl_remove(fsperm->fsp_sc_avl, node);
4440		free(node);
4441		node = next_node;
4442	}
4443
4444	node = uu_avl_first(fsperm->fsp_uge_avl);
4445	while (node != NULL) {
4446		who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_uge_avl,
4447		    node);
4448		who_perm_t *who_perm = &node->who_perm;
4449		who_perm_fini(who_perm);
4450		uu_avl_remove(fsperm->fsp_uge_avl, node);
4451		free(node);
4452		node = next_node;
4453	}
4454
4455	uu_avl_destroy(fsperm->fsp_sc_avl);
4456	uu_avl_destroy(fsperm->fsp_uge_avl);
4457}
4458
4459static void
4460set_deleg_perm_node(uu_avl_t *avl, deleg_perm_node_t *node,
4461    zfs_deleg_who_type_t who_type, const char *name, char locality)
4462{
4463	uu_avl_index_t idx = 0;
4464
4465	deleg_perm_node_t *found_node = NULL;
4466	deleg_perm_t	*deleg_perm = &node->dpn_perm;
4467
4468	deleg_perm_init(deleg_perm, who_type, name);
4469
4470	if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4471	    == NULL)
4472		uu_avl_insert(avl, node, idx);
4473	else {
4474		node = found_node;
4475		deleg_perm = &node->dpn_perm;
4476	}
4477
4478
4479	switch (locality) {
4480	case ZFS_DELEG_LOCAL:
4481		deleg_perm->dp_local = B_TRUE;
4482		break;
4483	case ZFS_DELEG_DESCENDENT:
4484		deleg_perm->dp_descend = B_TRUE;
4485		break;
4486	case ZFS_DELEG_NA:
4487		break;
4488	default:
4489		assert(B_FALSE); /* invalid locality */
4490	}
4491}
4492
4493static inline int
4494parse_who_perm(who_perm_t *who_perm, nvlist_t *nvl, char locality)
4495{
4496	nvpair_t *nvp = NULL;
4497	fs_perm_set_t *fspset = who_perm->who_fsperm->fsp_set;
4498	uu_avl_t *avl = who_perm->who_deleg_perm_avl;
4499	zfs_deleg_who_type_t who_type = who_perm->who_type;
4500
4501	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4502		const char *name = nvpair_name(nvp);
4503		data_type_t type = nvpair_type(nvp);
4504		uu_avl_pool_t *avl_pool = fspset->fsps_deleg_perm_avl_pool;
4505		deleg_perm_node_t *node =
4506		    safe_malloc(sizeof (deleg_perm_node_t));
4507
4508		assert(type == DATA_TYPE_BOOLEAN);
4509
4510		uu_avl_node_init(node, &node->dpn_avl_node, avl_pool);
4511		set_deleg_perm_node(avl, node, who_type, name, locality);
4512	}
4513
4514	return (0);
4515}
4516
4517static inline int
4518parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl)
4519{
4520	nvpair_t *nvp = NULL;
4521	fs_perm_set_t *fspset = fsperm->fsp_set;
4522
4523	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4524		nvlist_t *nvl2 = NULL;
4525		const char *name = nvpair_name(nvp);
4526		uu_avl_t *avl = NULL;
4527		uu_avl_pool_t *avl_pool = NULL;
4528		zfs_deleg_who_type_t perm_type = name[0];
4529		char perm_locality = name[1];
4530		const char *perm_name = name + 3;
4531		boolean_t is_set = B_TRUE;
4532		who_perm_t *who_perm = NULL;
4533
4534		assert('$' == name[2]);
4535
4536		if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4537			return (-1);
4538
4539		switch (perm_type) {
4540		case ZFS_DELEG_CREATE:
4541		case ZFS_DELEG_CREATE_SETS:
4542		case ZFS_DELEG_NAMED_SET:
4543		case ZFS_DELEG_NAMED_SET_SETS:
4544			avl_pool = fspset->fsps_named_set_avl_pool;
4545			avl = fsperm->fsp_sc_avl;
4546			break;
4547		case ZFS_DELEG_USER:
4548		case ZFS_DELEG_USER_SETS:
4549		case ZFS_DELEG_GROUP:
4550		case ZFS_DELEG_GROUP_SETS:
4551		case ZFS_DELEG_EVERYONE:
4552		case ZFS_DELEG_EVERYONE_SETS:
4553			avl_pool = fspset->fsps_who_perm_avl_pool;
4554			avl = fsperm->fsp_uge_avl;
4555			break;
4556
4557		default:
4558			assert(!"unhandled zfs_deleg_who_type_t");
4559		}
4560
4561		if (is_set) {
4562			who_perm_node_t *found_node = NULL;
4563			who_perm_node_t *node = safe_malloc(
4564			    sizeof (who_perm_node_t));
4565			who_perm = &node->who_perm;
4566			uu_avl_index_t idx = 0;
4567
4568			uu_avl_node_init(node, &node->who_avl_node, avl_pool);
4569			who_perm_init(who_perm, fsperm, perm_type, perm_name);
4570
4571			if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4572			    == NULL) {
4573				if (avl == fsperm->fsp_uge_avl) {
4574					uid_t rid = 0;
4575					struct passwd *p = NULL;
4576					struct group *g = NULL;
4577					const char *nice_name = NULL;
4578
4579					switch (perm_type) {
4580					case ZFS_DELEG_USER_SETS:
4581					case ZFS_DELEG_USER:
4582						rid = atoi(perm_name);
4583						p = getpwuid(rid);
4584						if (p)
4585							nice_name = p->pw_name;
4586						break;
4587					case ZFS_DELEG_GROUP_SETS:
4588					case ZFS_DELEG_GROUP:
4589						rid = atoi(perm_name);
4590						g = getgrgid(rid);
4591						if (g)
4592							nice_name = g->gr_name;
4593						break;
4594
4595					default:
4596						break;
4597					}
4598
4599					if (nice_name != NULL)
4600						(void) strlcpy(
4601						    node->who_perm.who_ug_name,
4602						    nice_name, 256);
4603				}
4604
4605				uu_avl_insert(avl, node, idx);
4606			} else {
4607				node = found_node;
4608				who_perm = &node->who_perm;
4609			}
4610		}
4611
4612		(void) parse_who_perm(who_perm, nvl2, perm_locality);
4613	}
4614
4615	return (0);
4616}
4617
4618static inline int
4619parse_fs_perm_set(fs_perm_set_t *fspset, nvlist_t *nvl)
4620{
4621	nvpair_t *nvp = NULL;
4622	uu_avl_index_t idx = 0;
4623
4624	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4625		nvlist_t *nvl2 = NULL;
4626		const char *fsname = nvpair_name(nvp);
4627		data_type_t type = nvpair_type(nvp);
4628		fs_perm_t *fsperm = NULL;
4629		fs_perm_node_t *node = safe_malloc(sizeof (fs_perm_node_t));
4630		if (node == NULL)
4631			nomem();
4632
4633		fsperm = &node->fspn_fsperm;
4634
4635		assert(DATA_TYPE_NVLIST == type);
4636
4637		uu_list_node_init(node, &node->fspn_list_node,
4638		    fspset->fsps_list_pool);
4639
4640		idx = uu_list_numnodes(fspset->fsps_list);
4641		fs_perm_init(fsperm, fspset, fsname);
4642
4643		if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4644			return (-1);
4645
4646		(void) parse_fs_perm(fsperm, nvl2);
4647
4648		uu_list_insert(fspset->fsps_list, node, idx);
4649	}
4650
4651	return (0);
4652}
4653
4654static inline const char *
4655deleg_perm_comment(zfs_deleg_note_t note)
4656{
4657	const char *str = "";
4658
4659	/* subcommands */
4660	switch (note) {
4661		/* SUBCOMMANDS */
4662	case ZFS_DELEG_NOTE_ALLOW:
4663		str = gettext("Must also have the permission that is being"
4664		    "\n\t\t\t\tallowed");
4665		break;
4666	case ZFS_DELEG_NOTE_CLONE:
4667		str = gettext("Must also have the 'create' ability and 'mount'"
4668		    "\n\t\t\t\tability in the origin file system");
4669		break;
4670	case ZFS_DELEG_NOTE_CREATE:
4671		str = gettext("Must also have the 'mount' ability");
4672		break;
4673	case ZFS_DELEG_NOTE_DESTROY:
4674		str = gettext("Must also have the 'mount' ability");
4675		break;
4676	case ZFS_DELEG_NOTE_DIFF:
4677		str = gettext("Allows lookup of paths within a dataset;"
4678		    "\n\t\t\t\tgiven an object number. Ordinary users need this"
4679		    "\n\t\t\t\tin order to use zfs diff");
4680		break;
4681	case ZFS_DELEG_NOTE_HOLD:
4682		str = gettext("Allows adding a user hold to a snapshot");
4683		break;
4684	case ZFS_DELEG_NOTE_MOUNT:
4685		str = gettext("Allows mount/umount of ZFS datasets");
4686		break;
4687	case ZFS_DELEG_NOTE_PROMOTE:
4688		str = gettext("Must also have the 'mount'\n\t\t\t\tand"
4689		    " 'promote' ability in the origin file system");
4690		break;
4691	case ZFS_DELEG_NOTE_RECEIVE:
4692		str = gettext("Must also have the 'mount' and 'create'"
4693		    " ability");
4694		break;
4695	case ZFS_DELEG_NOTE_RELEASE:
4696		str = gettext("Allows releasing a user hold which\n\t\t\t\t"
4697		    "might destroy the snapshot");
4698		break;
4699	case ZFS_DELEG_NOTE_RENAME:
4700		str = gettext("Must also have the 'mount' and 'create'"
4701		    "\n\t\t\t\tability in the new parent");
4702		break;
4703	case ZFS_DELEG_NOTE_ROLLBACK:
4704		str = gettext("");
4705		break;
4706	case ZFS_DELEG_NOTE_SEND:
4707		str = gettext("");
4708		break;
4709	case ZFS_DELEG_NOTE_SHARE:
4710		str = gettext("Allows sharing file systems over NFS or SMB"
4711		    "\n\t\t\t\tprotocols");
4712		break;
4713	case ZFS_DELEG_NOTE_SNAPSHOT:
4714		str = gettext("");
4715		break;
4716/*
4717 *	case ZFS_DELEG_NOTE_VSCAN:
4718 *		str = gettext("");
4719 *		break;
4720 */
4721		/* OTHER */
4722	case ZFS_DELEG_NOTE_GROUPQUOTA:
4723		str = gettext("Allows accessing any groupquota@... property");
4724		break;
4725	case ZFS_DELEG_NOTE_GROUPUSED:
4726		str = gettext("Allows reading any groupused@... property");
4727		break;
4728	case ZFS_DELEG_NOTE_USERPROP:
4729		str = gettext("Allows changing any user property");
4730		break;
4731	case ZFS_DELEG_NOTE_USERQUOTA:
4732		str = gettext("Allows accessing any userquota@... property");
4733		break;
4734	case ZFS_DELEG_NOTE_USERUSED:
4735		str = gettext("Allows reading any userused@... property");
4736		break;
4737		/* other */
4738	default:
4739		str = "";
4740	}
4741
4742	return (str);
4743}
4744
4745struct allow_opts {
4746	boolean_t local;
4747	boolean_t descend;
4748	boolean_t user;
4749	boolean_t group;
4750	boolean_t everyone;
4751	boolean_t create;
4752	boolean_t set;
4753	boolean_t recursive; /* unallow only */
4754	boolean_t prt_usage;
4755
4756	boolean_t prt_perms;
4757	char *who;
4758	char *perms;
4759	const char *dataset;
4760};
4761
4762static inline int
4763prop_cmp(const void *a, const void *b)
4764{
4765	const char *str1 = *(const char **)a;
4766	const char *str2 = *(const char **)b;
4767	return (strcmp(str1, str2));
4768}
4769
4770static void
4771allow_usage(boolean_t un, boolean_t requested, const char *msg)
4772{
4773	const char *opt_desc[] = {
4774		"-h", gettext("show this help message and exit"),
4775		"-l", gettext("set permission locally"),
4776		"-d", gettext("set permission for descents"),
4777		"-u", gettext("set permission for user"),
4778		"-g", gettext("set permission for group"),
4779		"-e", gettext("set permission for everyone"),
4780		"-c", gettext("set create time permission"),
4781		"-s", gettext("define permission set"),
4782		/* unallow only */
4783		"-r", gettext("remove permissions recursively"),
4784	};
4785	size_t unallow_size = sizeof (opt_desc) / sizeof (char *);
4786	size_t allow_size = unallow_size - 2;
4787	const char *props[ZFS_NUM_PROPS];
4788	int i;
4789	size_t count = 0;
4790	FILE *fp = requested ? stdout : stderr;
4791	zprop_desc_t *pdtbl = zfs_prop_get_table();
4792	const char *fmt = gettext("%-16s %-14s\t%s\n");
4793
4794	(void) fprintf(fp, gettext("Usage: %s\n"), get_usage(un ? HELP_UNALLOW :
4795	    HELP_ALLOW));
4796	(void) fprintf(fp, gettext("Options:\n"));
4797	for (i = 0; i < (un ? unallow_size : allow_size); i++) {
4798		const char *opt = opt_desc[i++];
4799		const char *optdsc = opt_desc[i];
4800		(void) fprintf(fp, gettext("  %-10s  %s\n"), opt, optdsc);
4801	}
4802
4803	(void) fprintf(fp, gettext("\nThe following permissions are "
4804	    "supported:\n\n"));
4805	(void) fprintf(fp, fmt, gettext("NAME"), gettext("TYPE"),
4806	    gettext("NOTES"));
4807	for (i = 0; i < ZFS_NUM_DELEG_NOTES; i++) {
4808		const char *perm_name = zfs_deleg_perm_tbl[i].z_perm;
4809		zfs_deleg_note_t perm_note = zfs_deleg_perm_tbl[i].z_note;
4810		const char *perm_type = deleg_perm_type(perm_note);
4811		const char *perm_comment = deleg_perm_comment(perm_note);
4812		(void) fprintf(fp, fmt, perm_name, perm_type, perm_comment);
4813	}
4814
4815	for (i = 0; i < ZFS_NUM_PROPS; i++) {
4816		zprop_desc_t *pd = &pdtbl[i];
4817		if (pd->pd_visible != B_TRUE)
4818			continue;
4819
4820		if (pd->pd_attr == PROP_READONLY)
4821			continue;
4822
4823		props[count++] = pd->pd_name;
4824	}
4825	props[count] = NULL;
4826
4827	qsort(props, count, sizeof (char *), prop_cmp);
4828
4829	for (i = 0; i < count; i++)
4830		(void) fprintf(fp, fmt, props[i], gettext("property"), "");
4831
4832	if (msg != NULL)
4833		(void) fprintf(fp, gettext("\nzfs: error: %s"), msg);
4834
4835	exit(requested ? 0 : 2);
4836}
4837
4838static inline const char *
4839munge_args(int argc, char **argv, boolean_t un, size_t expected_argc,
4840    char **permsp)
4841{
4842	if (un && argc == expected_argc - 1)
4843		*permsp = NULL;
4844	else if (argc == expected_argc)
4845		*permsp = argv[argc - 2];
4846	else
4847		allow_usage(un, B_FALSE,
4848		    gettext("wrong number of parameters\n"));
4849
4850	return (argv[argc - 1]);
4851}
4852
4853static void
4854parse_allow_args(int argc, char **argv, boolean_t un, struct allow_opts *opts)
4855{
4856	int uge_sum = opts->user + opts->group + opts->everyone;
4857	int csuge_sum = opts->create + opts->set + uge_sum;
4858	int ldcsuge_sum = csuge_sum + opts->local + opts->descend;
4859	int all_sum = un ? ldcsuge_sum + opts->recursive : ldcsuge_sum;
4860
4861	if (uge_sum > 1)
4862		allow_usage(un, B_FALSE,
4863		    gettext("-u, -g, and -e are mutually exclusive\n"));
4864
4865	if (opts->prt_usage) {
4866		if (argc == 0 && all_sum == 0)
4867			allow_usage(un, B_TRUE, NULL);
4868		else
4869			usage(B_FALSE);
4870	}
4871
4872	if (opts->set) {
4873		if (csuge_sum > 1)
4874			allow_usage(un, B_FALSE,
4875			    gettext("invalid options combined with -s\n"));
4876
4877		opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4878		if (argv[0][0] != '@')
4879			allow_usage(un, B_FALSE,
4880			    gettext("invalid set name: missing '@' prefix\n"));
4881		opts->who = argv[0];
4882	} else if (opts->create) {
4883		if (ldcsuge_sum > 1)
4884			allow_usage(un, B_FALSE,
4885			    gettext("invalid options combined with -c\n"));
4886		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4887	} else if (opts->everyone) {
4888		if (csuge_sum > 1)
4889			allow_usage(un, B_FALSE,
4890			    gettext("invalid options combined with -e\n"));
4891		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4892	} else if (uge_sum == 0 && argc > 0 && strcmp(argv[0], "everyone")
4893	    == 0) {
4894		opts->everyone = B_TRUE;
4895		argc--;
4896		argv++;
4897		opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4898	} else if (argc == 1 && !un) {
4899		opts->prt_perms = B_TRUE;
4900		opts->dataset = argv[argc-1];
4901	} else {
4902		opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4903		opts->who = argv[0];
4904	}
4905
4906	if (!opts->local && !opts->descend) {
4907		opts->local = B_TRUE;
4908		opts->descend = B_TRUE;
4909	}
4910}
4911
4912static void
4913store_allow_perm(zfs_deleg_who_type_t type, boolean_t local, boolean_t descend,
4914    const char *who, char *perms, nvlist_t *top_nvl)
4915{
4916	int i;
4917	char ld[2] = { '\0', '\0' };
4918	char who_buf[ZFS_MAXNAMELEN+32];
4919	char base_type = '\0';
4920	char set_type = '\0';
4921	nvlist_t *base_nvl = NULL;
4922	nvlist_t *set_nvl = NULL;
4923	nvlist_t *nvl;
4924
4925	if (nvlist_alloc(&base_nvl, NV_UNIQUE_NAME, 0) != 0)
4926		nomem();
4927	if (nvlist_alloc(&set_nvl, NV_UNIQUE_NAME, 0) !=  0)
4928		nomem();
4929
4930	switch (type) {
4931	case ZFS_DELEG_NAMED_SET_SETS:
4932	case ZFS_DELEG_NAMED_SET:
4933		set_type = ZFS_DELEG_NAMED_SET_SETS;
4934		base_type = ZFS_DELEG_NAMED_SET;
4935		ld[0] = ZFS_DELEG_NA;
4936		break;
4937	case ZFS_DELEG_CREATE_SETS:
4938	case ZFS_DELEG_CREATE:
4939		set_type = ZFS_DELEG_CREATE_SETS;
4940		base_type = ZFS_DELEG_CREATE;
4941		ld[0] = ZFS_DELEG_NA;
4942		break;
4943	case ZFS_DELEG_USER_SETS:
4944	case ZFS_DELEG_USER:
4945		set_type = ZFS_DELEG_USER_SETS;
4946		base_type = ZFS_DELEG_USER;
4947		if (local)
4948			ld[0] = ZFS_DELEG_LOCAL;
4949		if (descend)
4950			ld[1] = ZFS_DELEG_DESCENDENT;
4951		break;
4952	case ZFS_DELEG_GROUP_SETS:
4953	case ZFS_DELEG_GROUP:
4954		set_type = ZFS_DELEG_GROUP_SETS;
4955		base_type = ZFS_DELEG_GROUP;
4956		if (local)
4957			ld[0] = ZFS_DELEG_LOCAL;
4958		if (descend)
4959			ld[1] = ZFS_DELEG_DESCENDENT;
4960		break;
4961	case ZFS_DELEG_EVERYONE_SETS:
4962	case ZFS_DELEG_EVERYONE:
4963		set_type = ZFS_DELEG_EVERYONE_SETS;
4964		base_type = ZFS_DELEG_EVERYONE;
4965		if (local)
4966			ld[0] = ZFS_DELEG_LOCAL;
4967		if (descend)
4968			ld[1] = ZFS_DELEG_DESCENDENT;
4969		break;
4970
4971	default:
4972		assert(set_type != '\0' && base_type != '\0');
4973	}
4974
4975	if (perms != NULL) {
4976		char *curr = perms;
4977		char *end = curr + strlen(perms);
4978
4979		while (curr < end) {
4980			char *delim = strchr(curr, ',');
4981			if (delim == NULL)
4982				delim = end;
4983			else
4984				*delim = '\0';
4985
4986			if (curr[0] == '@')
4987				nvl = set_nvl;
4988			else
4989				nvl = base_nvl;
4990
4991			(void) nvlist_add_boolean(nvl, curr);
4992			if (delim != end)
4993				*delim = ',';
4994			curr = delim + 1;
4995		}
4996
4997		for (i = 0; i < 2; i++) {
4998			char locality = ld[i];
4999			if (locality == 0)
5000				continue;
5001
5002			if (!nvlist_empty(base_nvl)) {
5003				if (who != NULL)
5004					(void) snprintf(who_buf,
5005					    sizeof (who_buf), "%c%c$%s",
5006					    base_type, locality, who);
5007				else
5008					(void) snprintf(who_buf,
5009					    sizeof (who_buf), "%c%c$",
5010					    base_type, locality);
5011
5012				(void) nvlist_add_nvlist(top_nvl, who_buf,
5013				    base_nvl);
5014			}
5015
5016
5017			if (!nvlist_empty(set_nvl)) {
5018				if (who != NULL)
5019					(void) snprintf(who_buf,
5020					    sizeof (who_buf), "%c%c$%s",
5021					    set_type, locality, who);
5022				else
5023					(void) snprintf(who_buf,
5024					    sizeof (who_buf), "%c%c$",
5025					    set_type, locality);
5026
5027				(void) nvlist_add_nvlist(top_nvl, who_buf,
5028				    set_nvl);
5029			}
5030		}
5031	} else {
5032		for (i = 0; i < 2; i++) {
5033			char locality = ld[i];
5034			if (locality == 0)
5035				continue;
5036
5037			if (who != NULL)
5038				(void) snprintf(who_buf, sizeof (who_buf),
5039				    "%c%c$%s", base_type, locality, who);
5040			else
5041				(void) snprintf(who_buf, sizeof (who_buf),
5042				    "%c%c$", base_type, locality);
5043			(void) nvlist_add_boolean(top_nvl, who_buf);
5044
5045			if (who != NULL)
5046				(void) snprintf(who_buf, sizeof (who_buf),
5047				    "%c%c$%s", set_type, locality, who);
5048			else
5049				(void) snprintf(who_buf, sizeof (who_buf),
5050				    "%c%c$", set_type, locality);
5051			(void) nvlist_add_boolean(top_nvl, who_buf);
5052		}
5053	}
5054}
5055
5056static int
5057construct_fsacl_list(boolean_t un, struct allow_opts *opts, nvlist_t **nvlp)
5058{
5059	if (nvlist_alloc(nvlp, NV_UNIQUE_NAME, 0) != 0)
5060		nomem();
5061
5062	if (opts->set) {
5063		store_allow_perm(ZFS_DELEG_NAMED_SET, opts->local,
5064		    opts->descend, opts->who, opts->perms, *nvlp);
5065	} else if (opts->create) {
5066		store_allow_perm(ZFS_DELEG_CREATE, opts->local,
5067		    opts->descend, NULL, opts->perms, *nvlp);
5068	} else if (opts->everyone) {
5069		store_allow_perm(ZFS_DELEG_EVERYONE, opts->local,
5070		    opts->descend, NULL, opts->perms, *nvlp);
5071	} else {
5072		char *curr = opts->who;
5073		char *end = curr + strlen(curr);
5074
5075		while (curr < end) {
5076			const char *who;
5077			zfs_deleg_who_type_t who_type = ZFS_DELEG_WHO_UNKNOWN;
5078			char *endch;
5079			char *delim = strchr(curr, ',');
5080			char errbuf[256];
5081			char id[64];
5082			struct passwd *p = NULL;
5083			struct group *g = NULL;
5084
5085			uid_t rid;
5086			if (delim == NULL)
5087				delim = end;
5088			else
5089				*delim = '\0';
5090
5091			rid = (uid_t)strtol(curr, &endch, 0);
5092			if (opts->user) {
5093				who_type = ZFS_DELEG_USER;
5094				if (*endch != '\0')
5095					p = getpwnam(curr);
5096				else
5097					p = getpwuid(rid);
5098
5099				if (p != NULL)
5100					rid = p->pw_uid;
5101				else {
5102					(void) snprintf(errbuf, 256, gettext(
5103					    "invalid user %s"), curr);
5104					allow_usage(un, B_TRUE, errbuf);
5105				}
5106			} else if (opts->group) {
5107				who_type = ZFS_DELEG_GROUP;
5108				if (*endch != '\0')
5109					g = getgrnam(curr);
5110				else
5111					g = getgrgid(rid);
5112
5113				if (g != NULL)
5114					rid = g->gr_gid;
5115				else {
5116					(void) snprintf(errbuf, 256, gettext(
5117					    "invalid group %s"),  curr);
5118					allow_usage(un, B_TRUE, errbuf);
5119				}
5120			} else {
5121				if (*endch != '\0') {
5122					p = getpwnam(curr);
5123				} else {
5124					p = getpwuid(rid);
5125				}
5126
5127				if (p == NULL) {
5128					if (*endch != '\0') {
5129						g = getgrnam(curr);
5130					} else {
5131						g = getgrgid(rid);
5132					}
5133				}
5134
5135				if (p != NULL) {
5136					who_type = ZFS_DELEG_USER;
5137					rid = p->pw_uid;
5138				} else if (g != NULL) {
5139					who_type = ZFS_DELEG_GROUP;
5140					rid = g->gr_gid;
5141				} else {
5142					(void) snprintf(errbuf, 256, gettext(
5143					    "invalid user/group %s"), curr);
5144					allow_usage(un, B_TRUE, errbuf);
5145				}
5146			}
5147
5148			(void) sprintf(id, "%u", rid);
5149			who = id;
5150
5151			store_allow_perm(who_type, opts->local,
5152			    opts->descend, who, opts->perms, *nvlp);
5153			curr = delim + 1;
5154		}
5155	}
5156
5157	return (0);
5158}
5159
5160static void
5161print_set_creat_perms(uu_avl_t *who_avl)
5162{
5163	const char *sc_title[] = {
5164		gettext("Permission sets:\n"),
5165		gettext("Create time permissions:\n"),
5166		NULL
5167	};
5168	const char **title_ptr = sc_title;
5169	who_perm_node_t *who_node = NULL;
5170	int prev_weight = -1;
5171
5172	for (who_node = uu_avl_first(who_avl); who_node != NULL;
5173	    who_node = uu_avl_next(who_avl, who_node)) {
5174		uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
5175		zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
5176		const char *who_name = who_node->who_perm.who_name;
5177		int weight = who_type2weight(who_type);
5178		boolean_t first = B_TRUE;
5179		deleg_perm_node_t *deleg_node;
5180
5181		if (prev_weight != weight) {
5182			(void) printf(*title_ptr++);
5183			prev_weight = weight;
5184		}
5185
5186		if (who_name == NULL || strnlen(who_name, 1) == 0)
5187			(void) printf("\t");
5188		else
5189			(void) printf("\t%s ", who_name);
5190
5191		for (deleg_node = uu_avl_first(avl); deleg_node != NULL;
5192		    deleg_node = uu_avl_next(avl, deleg_node)) {
5193			if (first) {
5194				(void) printf("%s",
5195				    deleg_node->dpn_perm.dp_name);
5196				first = B_FALSE;
5197			} else
5198				(void) printf(",%s",
5199				    deleg_node->dpn_perm.dp_name);
5200		}
5201
5202		(void) printf("\n");
5203	}
5204}
5205
5206static void
5207print_uge_deleg_perms(uu_avl_t *who_avl, boolean_t local, boolean_t descend,
5208    const char *title)
5209{
5210	who_perm_node_t *who_node = NULL;
5211	boolean_t prt_title = B_TRUE;
5212	uu_avl_walk_t *walk;
5213
5214	if ((walk = uu_avl_walk_start(who_avl, UU_WALK_ROBUST)) == NULL)
5215		nomem();
5216
5217	while ((who_node = uu_avl_walk_next(walk)) != NULL) {
5218		const char *who_name = who_node->who_perm.who_name;
5219		const char *nice_who_name = who_node->who_perm.who_ug_name;
5220		uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
5221		zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
5222		char delim = ' ';
5223		deleg_perm_node_t *deleg_node;
5224		boolean_t prt_who = B_TRUE;
5225
5226		for (deleg_node = uu_avl_first(avl);
5227		    deleg_node != NULL;
5228		    deleg_node = uu_avl_next(avl, deleg_node)) {
5229			if (local != deleg_node->dpn_perm.dp_local ||
5230			    descend != deleg_node->dpn_perm.dp_descend)
5231				continue;
5232
5233			if (prt_who) {
5234				const char *who = NULL;
5235				if (prt_title) {
5236					prt_title = B_FALSE;
5237					(void) printf(title);
5238				}
5239
5240				switch (who_type) {
5241				case ZFS_DELEG_USER_SETS:
5242				case ZFS_DELEG_USER:
5243					who = gettext("user");
5244					if (nice_who_name)
5245						who_name  = nice_who_name;
5246					break;
5247				case ZFS_DELEG_GROUP_SETS:
5248				case ZFS_DELEG_GROUP:
5249					who = gettext("group");
5250					if (nice_who_name)
5251						who_name  = nice_who_name;
5252					break;
5253				case ZFS_DELEG_EVERYONE_SETS:
5254				case ZFS_DELEG_EVERYONE:
5255					who = gettext("everyone");
5256					who_name = NULL;
5257					break;
5258
5259				default:
5260					assert(who != NULL);
5261				}
5262
5263				prt_who = B_FALSE;
5264				if (who_name == NULL)
5265					(void) printf("\t%s", who);
5266				else
5267					(void) printf("\t%s %s", who, who_name);
5268			}
5269
5270			(void) printf("%c%s", delim,
5271			    deleg_node->dpn_perm.dp_name);
5272			delim = ',';
5273		}
5274
5275		if (!prt_who)
5276			(void) printf("\n");
5277	}
5278
5279	uu_avl_walk_end(walk);
5280}
5281
5282static void
5283print_fs_perms(fs_perm_set_t *fspset)
5284{
5285	fs_perm_node_t *node = NULL;
5286	char buf[ZFS_MAXNAMELEN+32];
5287	const char *dsname = buf;
5288
5289	for (node = uu_list_first(fspset->fsps_list); node != NULL;
5290	    node = uu_list_next(fspset->fsps_list, node)) {
5291		uu_avl_t *sc_avl = node->fspn_fsperm.fsp_sc_avl;
5292		uu_avl_t *uge_avl = node->fspn_fsperm.fsp_uge_avl;
5293		int left = 0;
5294
5295		(void) snprintf(buf, ZFS_MAXNAMELEN+32,
5296		    gettext("---- Permissions on %s "),
5297		    node->fspn_fsperm.fsp_name);
5298		(void) printf(dsname);
5299		left = 70 - strlen(buf);
5300		while (left-- > 0)
5301			(void) printf("-");
5302		(void) printf("\n");
5303
5304		print_set_creat_perms(sc_avl);
5305		print_uge_deleg_perms(uge_avl, B_TRUE, B_FALSE,
5306		    gettext("Local permissions:\n"));
5307		print_uge_deleg_perms(uge_avl, B_FALSE, B_TRUE,
5308		    gettext("Descendent permissions:\n"));
5309		print_uge_deleg_perms(uge_avl, B_TRUE, B_TRUE,
5310		    gettext("Local+Descendent permissions:\n"));
5311	}
5312}
5313
5314static fs_perm_set_t fs_perm_set = { NULL, NULL, NULL, NULL };
5315
5316struct deleg_perms {
5317	boolean_t un;
5318	nvlist_t *nvl;
5319};
5320
5321static int
5322set_deleg_perms(zfs_handle_t *zhp, void *data)
5323{
5324	struct deleg_perms *perms = (struct deleg_perms *)data;
5325	zfs_type_t zfs_type = zfs_get_type(zhp);
5326
5327	if (zfs_type != ZFS_TYPE_FILESYSTEM && zfs_type != ZFS_TYPE_VOLUME)
5328		return (0);
5329
5330	return (zfs_set_fsacl(zhp, perms->un, perms->nvl));
5331}
5332
5333static int
5334zfs_do_allow_unallow_impl(int argc, char **argv, boolean_t un)
5335{
5336	zfs_handle_t *zhp;
5337	nvlist_t *perm_nvl = NULL;
5338	nvlist_t *update_perm_nvl = NULL;
5339	int error = 1;
5340	int c;
5341	struct allow_opts opts = { 0 };
5342
5343	const char *optstr = un ? "ldugecsrh" : "ldugecsh";
5344
5345	/* check opts */
5346	while ((c = getopt(argc, argv, optstr)) != -1) {
5347		switch (c) {
5348		case 'l':
5349			opts.local = B_TRUE;
5350			break;
5351		case 'd':
5352			opts.descend = B_TRUE;
5353			break;
5354		case 'u':
5355			opts.user = B_TRUE;
5356			break;
5357		case 'g':
5358			opts.group = B_TRUE;
5359			break;
5360		case 'e':
5361			opts.everyone = B_TRUE;
5362			break;
5363		case 's':
5364			opts.set = B_TRUE;
5365			break;
5366		case 'c':
5367			opts.create = B_TRUE;
5368			break;
5369		case 'r':
5370			opts.recursive = B_TRUE;
5371			break;
5372		case ':':
5373			(void) fprintf(stderr, gettext("missing argument for "
5374			    "'%c' option\n"), optopt);
5375			usage(B_FALSE);
5376			break;
5377		case 'h':
5378			opts.prt_usage = B_TRUE;
5379			break;
5380		case '?':
5381			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5382			    optopt);
5383			usage(B_FALSE);
5384		}
5385	}
5386
5387	argc -= optind;
5388	argv += optind;
5389
5390	/* check arguments */
5391	parse_allow_args(argc, argv, un, &opts);
5392
5393	/* try to open the dataset */
5394	if ((zhp = zfs_open(g_zfs, opts.dataset, ZFS_TYPE_FILESYSTEM |
5395	    ZFS_TYPE_VOLUME)) == NULL) {
5396		(void) fprintf(stderr, "Failed to open dataset: %s\n",
5397		    opts.dataset);
5398		return (-1);
5399	}
5400
5401	if (zfs_get_fsacl(zhp, &perm_nvl) != 0)
5402		goto cleanup2;
5403
5404	fs_perm_set_init(&fs_perm_set);
5405	if (parse_fs_perm_set(&fs_perm_set, perm_nvl) != 0) {
5406		(void) fprintf(stderr, "Failed to parse fsacl permissions\n");
5407		goto cleanup1;
5408	}
5409
5410	if (opts.prt_perms)
5411		print_fs_perms(&fs_perm_set);
5412	else {
5413		(void) construct_fsacl_list(un, &opts, &update_perm_nvl);
5414		if (zfs_set_fsacl(zhp, un, update_perm_nvl) != 0)
5415			goto cleanup0;
5416
5417		if (un && opts.recursive) {
5418			struct deleg_perms data = { un, update_perm_nvl };
5419			if (zfs_iter_filesystems(zhp, set_deleg_perms,
5420			    &data) != 0)
5421				goto cleanup0;
5422		}
5423	}
5424
5425	error = 0;
5426
5427cleanup0:
5428	nvlist_free(perm_nvl);
5429	nvlist_free(update_perm_nvl);
5430cleanup1:
5431	fs_perm_set_fini(&fs_perm_set);
5432cleanup2:
5433	zfs_close(zhp);
5434
5435	return (error);
5436}
5437
5438static int
5439zfs_do_allow(int argc, char **argv)
5440{
5441	return (zfs_do_allow_unallow_impl(argc, argv, B_FALSE));
5442}
5443
5444static int
5445zfs_do_unallow(int argc, char **argv)
5446{
5447	return (zfs_do_allow_unallow_impl(argc, argv, B_TRUE));
5448}
5449
5450static int
5451zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
5452{
5453	int errors = 0;
5454	int i;
5455	const char *tag;
5456	boolean_t recursive = B_FALSE;
5457	const char *opts = holding ? "rt" : "r";
5458	int c;
5459
5460	/* check options */
5461	while ((c = getopt(argc, argv, opts)) != -1) {
5462		switch (c) {
5463		case 'r':
5464			recursive = B_TRUE;
5465			break;
5466		case '?':
5467			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5468			    optopt);
5469			usage(B_FALSE);
5470		}
5471	}
5472
5473	argc -= optind;
5474	argv += optind;
5475
5476	/* check number of arguments */
5477	if (argc < 2)
5478		usage(B_FALSE);
5479
5480	tag = argv[0];
5481	--argc;
5482	++argv;
5483
5484	if (holding && tag[0] == '.') {
5485		/* tags starting with '.' are reserved for libzfs */
5486		(void) fprintf(stderr, gettext("tag may not start with '.'\n"));
5487		usage(B_FALSE);
5488	}
5489
5490	for (i = 0; i < argc; ++i) {
5491		zfs_handle_t *zhp;
5492		char parent[ZFS_MAXNAMELEN];
5493		const char *delim;
5494		char *path = argv[i];
5495
5496		delim = strchr(path, '@');
5497		if (delim == NULL) {
5498			(void) fprintf(stderr,
5499			    gettext("'%s' is not a snapshot\n"), path);
5500			++errors;
5501			continue;
5502		}
5503		(void) strncpy(parent, path, delim - path);
5504		parent[delim - path] = '\0';
5505
5506		zhp = zfs_open(g_zfs, parent,
5507		    ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
5508		if (zhp == NULL) {
5509			++errors;
5510			continue;
5511		}
5512		if (holding) {
5513			if (zfs_hold(zhp, delim+1, tag, recursive, -1) != 0)
5514				++errors;
5515		} else {
5516			if (zfs_release(zhp, delim+1, tag, recursive) != 0)
5517				++errors;
5518		}
5519		zfs_close(zhp);
5520	}
5521
5522	return (errors != 0);
5523}
5524
5525/*
5526 * zfs hold [-r] [-t] <tag> <snap> ...
5527 *
5528 *	-r	Recursively hold
5529 *
5530 * Apply a user-hold with the given tag to the list of snapshots.
5531 */
5532static int
5533zfs_do_hold(int argc, char **argv)
5534{
5535	return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
5536}
5537
5538/*
5539 * zfs release [-r] <tag> <snap> ...
5540 *
5541 *	-r	Recursively release
5542 *
5543 * Release a user-hold with the given tag from the list of snapshots.
5544 */
5545static int
5546zfs_do_release(int argc, char **argv)
5547{
5548	return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
5549}
5550
5551typedef struct holds_cbdata {
5552	boolean_t	cb_recursive;
5553	const char	*cb_snapname;
5554	nvlist_t	**cb_nvlp;
5555	size_t		cb_max_namelen;
5556	size_t		cb_max_taglen;
5557} holds_cbdata_t;
5558
5559#define	STRFTIME_FMT_STR "%a %b %e %k:%M %Y"
5560#define	DATETIME_BUF_LEN (32)
5561/*
5562 *
5563 */
5564static void
5565print_holds(boolean_t scripted, size_t nwidth, size_t tagwidth, nvlist_t *nvl)
5566{
5567	int i;
5568	nvpair_t *nvp = NULL;
5569	char *hdr_cols[] = { "NAME", "TAG", "TIMESTAMP" };
5570	const char *col;
5571
5572	if (!scripted) {
5573		for (i = 0; i < 3; i++) {
5574			col = gettext(hdr_cols[i]);
5575			if (i < 2)
5576				(void) printf("%-*s  ", i ? tagwidth : nwidth,
5577				    col);
5578			else
5579				(void) printf("%s\n", col);
5580		}
5581	}
5582
5583	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5584		char *zname = nvpair_name(nvp);
5585		nvlist_t *nvl2;
5586		nvpair_t *nvp2 = NULL;
5587		(void) nvpair_value_nvlist(nvp, &nvl2);
5588		while ((nvp2 = nvlist_next_nvpair(nvl2, nvp2)) != NULL) {
5589			char tsbuf[DATETIME_BUF_LEN];
5590			char *tagname = nvpair_name(nvp2);
5591			uint64_t val = 0;
5592			time_t time;
5593			struct tm t;
5594			char sep = scripted ? '\t' : ' ';
5595			size_t sepnum = scripted ? 1 : 2;
5596
5597			(void) nvpair_value_uint64(nvp2, &val);
5598			time = (time_t)val;
5599			(void) localtime_r(&time, &t);
5600			(void) strftime(tsbuf, DATETIME_BUF_LEN,
5601			    gettext(STRFTIME_FMT_STR), &t);
5602
5603			(void) printf("%-*s%*c%-*s%*c%s\n", nwidth, zname,
5604			    sepnum, sep, tagwidth, tagname, sepnum, sep, tsbuf);
5605		}
5606	}
5607}
5608
5609/*
5610 * Generic callback function to list a dataset or snapshot.
5611 */
5612static int
5613holds_callback(zfs_handle_t *zhp, void *data)
5614{
5615	holds_cbdata_t *cbp = data;
5616	nvlist_t *top_nvl = *cbp->cb_nvlp;
5617	nvlist_t *nvl = NULL;
5618	nvpair_t *nvp = NULL;
5619	const char *zname = zfs_get_name(zhp);
5620	size_t znamelen = strnlen(zname, ZFS_MAXNAMELEN);
5621
5622	if (cbp->cb_recursive) {
5623		const char *snapname;
5624		char *delim  = strchr(zname, '@');
5625		if (delim == NULL)
5626			return (0);
5627
5628		snapname = delim + 1;
5629		if (strcmp(cbp->cb_snapname, snapname))
5630			return (0);
5631	}
5632
5633	if (zfs_get_holds(zhp, &nvl) != 0)
5634		return (-1);
5635
5636	if (znamelen > cbp->cb_max_namelen)
5637		cbp->cb_max_namelen  = znamelen;
5638
5639	while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5640		const char *tag = nvpair_name(nvp);
5641		size_t taglen = strnlen(tag, MAXNAMELEN);
5642		if (taglen > cbp->cb_max_taglen)
5643			cbp->cb_max_taglen  = taglen;
5644	}
5645
5646	return (nvlist_add_nvlist(top_nvl, zname, nvl));
5647}
5648
5649/*
5650 * zfs holds [-r] <snap> ...
5651 *
5652 *	-r	Recursively hold
5653 */
5654static int
5655zfs_do_holds(int argc, char **argv)
5656{
5657	int errors = 0;
5658	int c;
5659	int i;
5660	boolean_t scripted = B_FALSE;
5661	boolean_t recursive = B_FALSE;
5662	const char *opts = "rH";
5663	nvlist_t *nvl;
5664
5665	int types = ZFS_TYPE_SNAPSHOT;
5666	holds_cbdata_t cb = { 0 };
5667
5668	int limit = 0;
5669	int ret = 0;
5670	int flags = 0;
5671
5672	/* check options */
5673	while ((c = getopt(argc, argv, opts)) != -1) {
5674		switch (c) {
5675		case 'r':
5676			recursive = B_TRUE;
5677			break;
5678		case 'H':
5679			scripted = B_TRUE;
5680			break;
5681		case '?':
5682			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
5683			    optopt);
5684			usage(B_FALSE);
5685		}
5686	}
5687
5688	if (recursive) {
5689		types |= ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
5690		flags |= ZFS_ITER_RECURSE;
5691	}
5692
5693	argc -= optind;
5694	argv += optind;
5695
5696	/* check number of arguments */
5697	if (argc < 1)
5698		usage(B_FALSE);
5699
5700	if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
5701		nomem();
5702
5703	for (i = 0; i < argc; ++i) {
5704		char *snapshot = argv[i];
5705		const char *delim;
5706		const char *snapname;
5707
5708		delim = strchr(snapshot, '@');
5709		if (delim == NULL) {
5710			(void) fprintf(stderr,
5711			    gettext("'%s' is not a snapshot\n"), snapshot);
5712			++errors;
5713			continue;
5714		}
5715		snapname = delim + 1;
5716		if (recursive)
5717			snapshot[delim - snapshot] = '\0';
5718
5719		cb.cb_recursive = recursive;
5720		cb.cb_snapname = snapname;
5721		cb.cb_nvlp = &nvl;
5722
5723		/*
5724		 *  1. collect holds data, set format options
5725		 */
5726		ret = zfs_for_each(argc, argv, flags, types, NULL, NULL, limit,
5727		    holds_callback, &cb);
5728		if (ret != 0)
5729			++errors;
5730	}
5731
5732	/*
5733	 *  2. print holds data
5734	 */
5735	print_holds(scripted, cb.cb_max_namelen, cb.cb_max_taglen, nvl);
5736
5737	if (nvlist_empty(nvl))
5738		(void) printf(gettext("no datasets available\n"));
5739
5740	nvlist_free(nvl);
5741
5742	return (0 != errors);
5743}
5744
5745#define	CHECK_SPINNER 30
5746#define	SPINNER_TIME 3		/* seconds */
5747#define	MOUNT_TIME 5		/* seconds */
5748
5749static int
5750get_one_dataset(zfs_handle_t *zhp, void *data)
5751{
5752	static char *spin[] = { "-", "\\", "|", "/" };
5753	static int spinval = 0;
5754	static int spincheck = 0;
5755	static time_t last_spin_time = (time_t)0;
5756	get_all_cb_t *cbp = data;
5757	zfs_type_t type = zfs_get_type(zhp);
5758
5759	if (cbp->cb_verbose) {
5760		if (--spincheck < 0) {
5761			time_t now = time(NULL);
5762			if (last_spin_time + SPINNER_TIME < now) {
5763				update_progress(spin[spinval++ % 4]);
5764				last_spin_time = now;
5765			}
5766			spincheck = CHECK_SPINNER;
5767		}
5768	}
5769
5770	/*
5771	 * Interate over any nested datasets.
5772	 */
5773	if (zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
5774		zfs_close(zhp);
5775		return (1);
5776	}
5777
5778	/*
5779	 * Skip any datasets whose type does not match.
5780	 */
5781	if ((type & ZFS_TYPE_FILESYSTEM) == 0) {
5782		zfs_close(zhp);
5783		return (0);
5784	}
5785	libzfs_add_handle(cbp, zhp);
5786	assert(cbp->cb_used <= cbp->cb_alloc);
5787
5788	return (0);
5789}
5790
5791static void
5792get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
5793{
5794	get_all_cb_t cb = { 0 };
5795	cb.cb_verbose = verbose;
5796	cb.cb_getone = get_one_dataset;
5797
5798	if (verbose)
5799		set_progress_header(gettext("Reading ZFS config"));
5800	(void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
5801
5802	*dslist = cb.cb_handles;
5803	*count = cb.cb_used;
5804
5805	if (verbose)
5806		finish_progress(gettext("done."));
5807}
5808
5809/*
5810 * Generic callback for sharing or mounting filesystems.  Because the code is so
5811 * similar, we have a common function with an extra parameter to determine which
5812 * mode we are using.
5813 */
5814#define	OP_SHARE	0x1
5815#define	OP_MOUNT	0x2
5816
5817/*
5818 * Share or mount a dataset.
5819 */
5820static int
5821share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
5822    boolean_t explicit, const char *options)
5823{
5824	char mountpoint[ZFS_MAXPROPLEN];
5825	char shareopts[ZFS_MAXPROPLEN];
5826	char smbshareopts[ZFS_MAXPROPLEN];
5827	const char *cmdname = op == OP_SHARE ? "share" : "mount";
5828	struct mnttab mnt;
5829	uint64_t zoned, canmount;
5830	boolean_t shared_nfs, shared_smb;
5831
5832	assert(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM);
5833
5834	/*
5835	 * Check to make sure we can mount/share this dataset.  If we
5836	 * are in the global zone and the filesystem is exported to a
5837	 * local zone, or if we are in a local zone and the
5838	 * filesystem is not exported, then it is an error.
5839	 */
5840	zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
5841
5842	if (zoned && getzoneid() == GLOBAL_ZONEID) {
5843		if (!explicit)
5844			return (0);
5845
5846		(void) fprintf(stderr, gettext("cannot %s '%s': "
5847		    "dataset is exported to a local zone\n"), cmdname,
5848		    zfs_get_name(zhp));
5849		return (1);
5850
5851	} else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
5852		if (!explicit)
5853			return (0);
5854
5855		(void) fprintf(stderr, gettext("cannot %s '%s': "
5856		    "permission denied\n"), cmdname,
5857		    zfs_get_name(zhp));
5858		return (1);
5859	}
5860
5861	/*
5862	 * Ignore any filesystems which don't apply to us. This
5863	 * includes those with a legacy mountpoint, or those with
5864	 * legacy share options.
5865	 */
5866	verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
5867	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
5868	verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
5869	    sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
5870	verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
5871	    sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
5872
5873	if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
5874	    strcmp(smbshareopts, "off") == 0) {
5875		if (!explicit)
5876			return (0);
5877
5878		(void) fprintf(stderr, gettext("cannot share '%s': "
5879		    "legacy share\n"), zfs_get_name(zhp));
5880		(void) fprintf(stderr, gettext("to "
5881		    "share this filesystem set "
5882		    "sharenfs property on\n"));
5883		return (1);
5884	}
5885
5886	/*
5887	 * We cannot share or mount legacy filesystems. If the
5888	 * shareopts is non-legacy but the mountpoint is legacy, we
5889	 * treat it as a legacy share.
5890	 */
5891	if (strcmp(mountpoint, "legacy") == 0) {
5892		if (!explicit)
5893			return (0);
5894
5895		(void) fprintf(stderr, gettext("cannot %s '%s': "
5896		    "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
5897		(void) fprintf(stderr, gettext("use %s(8) to "
5898		    "%s this filesystem\n"), cmdname, cmdname);
5899		return (1);
5900	}
5901
5902	if (strcmp(mountpoint, "none") == 0) {
5903		if (!explicit)
5904			return (0);
5905
5906		(void) fprintf(stderr, gettext("cannot %s '%s': no "
5907		    "mountpoint set\n"), cmdname, zfs_get_name(zhp));
5908		return (1);
5909	}
5910
5911	/*
5912	 * canmount	explicit	outcome
5913	 * on		no		pass through
5914	 * on		yes		pass through
5915	 * off		no		return 0
5916	 * off		yes		display error, return 1
5917	 * noauto	no		return 0
5918	 * noauto	yes		pass through
5919	 */
5920	canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
5921	if (canmount == ZFS_CANMOUNT_OFF) {
5922		if (!explicit)
5923			return (0);
5924
5925		(void) fprintf(stderr, gettext("cannot %s '%s': "
5926		    "'canmount' property is set to 'off'\n"), cmdname,
5927		    zfs_get_name(zhp));
5928		return (1);
5929	} else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
5930		return (0);
5931	}
5932
5933	/*
5934	 * If this filesystem is inconsistent and has a receive resume
5935	 * token, we can not mount it.
5936	 */
5937	if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) &&
5938	    zfs_prop_get(zhp, ZFS_PROP_RECEIVE_RESUME_TOKEN,
5939	    NULL, 0, NULL, NULL, 0, B_TRUE) == 0) {
5940		if (!explicit)
5941			return (0);
5942
5943		(void) fprintf(stderr, gettext("cannot %s '%s': "
5944		    "Contains partially-completed state from "
5945		    "\"zfs receive -r\", which can be resumed with "
5946		    "\"zfs send -t\"\n"),
5947		    cmdname, zfs_get_name(zhp));
5948		return (1);
5949	}
5950
5951	/*
5952	 * At this point, we have verified that the mountpoint and/or
5953	 * shareopts are appropriate for auto management. If the
5954	 * filesystem is already mounted or shared, return (failing
5955	 * for explicit requests); otherwise mount or share the
5956	 * filesystem.
5957	 */
5958	switch (op) {
5959	case OP_SHARE:
5960
5961		shared_nfs = zfs_is_shared_nfs(zhp, NULL);
5962		shared_smb = zfs_is_shared_smb(zhp, NULL);
5963
5964		if ((shared_nfs && shared_smb) ||
5965		    (shared_nfs && strcmp(shareopts, "on") == 0 &&
5966		    strcmp(smbshareopts, "off") == 0) ||
5967		    (shared_smb && strcmp(smbshareopts, "on") == 0 &&
5968		    strcmp(shareopts, "off") == 0)) {
5969			if (!explicit)
5970				return (0);
5971
5972			(void) fprintf(stderr, gettext("cannot share "
5973			    "'%s': filesystem already shared\n"),
5974			    zfs_get_name(zhp));
5975			return (1);
5976		}
5977
5978		if (!zfs_is_mounted(zhp, NULL) &&
5979		    zfs_mount(zhp, NULL, 0) != 0)
5980			return (1);
5981
5982		if (protocol == NULL) {
5983			if (zfs_shareall(zhp) != 0)
5984				return (1);
5985		} else if (strcmp(protocol, "nfs") == 0) {
5986			if (zfs_share_nfs(zhp))
5987				return (1);
5988		} else if (strcmp(protocol, "smb") == 0) {
5989			if (zfs_share_smb(zhp))
5990				return (1);
5991		} else {
5992			(void) fprintf(stderr, gettext("cannot share "
5993			    "'%s': invalid share type '%s' "
5994			    "specified\n"),
5995			    zfs_get_name(zhp), protocol);
5996			return (1);
5997		}
5998
5999		break;
6000
6001	case OP_MOUNT:
6002		if (options == NULL)
6003			mnt.mnt_mntopts = "";
6004		else
6005			mnt.mnt_mntopts = (char *)options;
6006
6007		if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
6008		    zfs_is_mounted(zhp, NULL)) {
6009			if (!explicit)
6010				return (0);
6011
6012			(void) fprintf(stderr, gettext("cannot mount "
6013			    "'%s': filesystem already mounted\n"),
6014			    zfs_get_name(zhp));
6015			return (1);
6016		}
6017
6018		if (zfs_mount(zhp, options, flags) != 0)
6019			return (1);
6020		break;
6021	}
6022
6023	return (0);
6024}
6025
6026/*
6027 * Reports progress in the form "(current/total)".  Not thread-safe.
6028 */
6029static void
6030report_mount_progress(int current, int total)
6031{
6032	static time_t last_progress_time = 0;
6033	time_t now = time(NULL);
6034	char info[32];
6035
6036	/* report 1..n instead of 0..n-1 */
6037	++current;
6038
6039	/* display header if we're here for the first time */
6040	if (current == 1) {
6041		set_progress_header(gettext("Mounting ZFS filesystems"));
6042	} else if (current != total && last_progress_time + MOUNT_TIME >= now) {
6043		/* too soon to report again */
6044		return;
6045	}
6046
6047	last_progress_time = now;
6048
6049	(void) sprintf(info, "(%d/%d)", current, total);
6050
6051	if (current == total)
6052		finish_progress(info);
6053	else
6054		update_progress(info);
6055}
6056
6057static void
6058append_options(char *mntopts, char *newopts)
6059{
6060	int len = strlen(mntopts);
6061
6062	/* original length plus new string to append plus 1 for the comma */
6063	if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
6064		(void) fprintf(stderr, gettext("the opts argument for "
6065		    "'%c' option is too long (more than %d chars)\n"),
6066		    "-o", MNT_LINE_MAX);
6067		usage(B_FALSE);
6068	}
6069
6070	if (*mntopts)
6071		mntopts[len++] = ',';
6072
6073	(void) strcpy(&mntopts[len], newopts);
6074}
6075
6076static int
6077share_mount(int op, int argc, char **argv)
6078{
6079	int do_all = 0;
6080	boolean_t verbose = B_FALSE;
6081	int c, ret = 0;
6082	char *options = NULL;
6083	int flags = 0;
6084
6085	/* check options */
6086	while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
6087	    != -1) {
6088		switch (c) {
6089		case 'a':
6090			do_all = 1;
6091			break;
6092		case 'v':
6093			verbose = B_TRUE;
6094			break;
6095		case 'o':
6096			if (*optarg == '\0') {
6097				(void) fprintf(stderr, gettext("empty mount "
6098				    "options (-o) specified\n"));
6099				usage(B_FALSE);
6100			}
6101
6102			if (options == NULL)
6103				options = safe_malloc(MNT_LINE_MAX + 1);
6104
6105			/* option validation is done later */
6106			append_options(options, optarg);
6107			break;
6108
6109		case 'O':
6110			warnx("no overlay mounts support on FreeBSD, ignoring");
6111			break;
6112		case ':':
6113			(void) fprintf(stderr, gettext("missing argument for "
6114			    "'%c' option\n"), optopt);
6115			usage(B_FALSE);
6116			break;
6117		case '?':
6118			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6119			    optopt);
6120			usage(B_FALSE);
6121		}
6122	}
6123
6124	argc -= optind;
6125	argv += optind;
6126
6127	/* check number of arguments */
6128	if (do_all) {
6129		zfs_handle_t **dslist = NULL;
6130		size_t i, count = 0;
6131		char *protocol = NULL;
6132
6133		if (op == OP_SHARE && argc > 0) {
6134			if (strcmp(argv[0], "nfs") != 0 &&
6135			    strcmp(argv[0], "smb") != 0) {
6136				(void) fprintf(stderr, gettext("share type "
6137				    "must be 'nfs' or 'smb'\n"));
6138				usage(B_FALSE);
6139			}
6140			protocol = argv[0];
6141			argc--;
6142			argv++;
6143		}
6144
6145		if (argc != 0) {
6146			(void) fprintf(stderr, gettext("too many arguments\n"));
6147			usage(B_FALSE);
6148		}
6149
6150		start_progress_timer();
6151		get_all_datasets(&dslist, &count, verbose);
6152
6153		if (count == 0)
6154			return (0);
6155
6156		qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
6157
6158		for (i = 0; i < count; i++) {
6159			if (verbose)
6160				report_mount_progress(i, count);
6161
6162			if (share_mount_one(dslist[i], op, flags, protocol,
6163			    B_FALSE, options) != 0)
6164				ret = 1;
6165			zfs_close(dslist[i]);
6166		}
6167
6168		free(dslist);
6169	} else if (argc == 0) {
6170		struct mnttab entry;
6171
6172		if ((op == OP_SHARE) || (options != NULL)) {
6173			(void) fprintf(stderr, gettext("missing filesystem "
6174			    "argument (specify -a for all)\n"));
6175			usage(B_FALSE);
6176		}
6177
6178		/*
6179		 * When mount is given no arguments, go through /etc/mnttab and
6180		 * display any active ZFS mounts.  We hide any snapshots, since
6181		 * they are controlled automatically.
6182		 */
6183		rewind(mnttab_file);
6184		while (getmntent(mnttab_file, &entry) == 0) {
6185			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
6186			    strchr(entry.mnt_special, '@') != NULL)
6187				continue;
6188
6189			(void) printf("%-30s  %s\n", entry.mnt_special,
6190			    entry.mnt_mountp);
6191		}
6192
6193	} else {
6194		zfs_handle_t *zhp;
6195
6196		if (argc > 1) {
6197			(void) fprintf(stderr,
6198			    gettext("too many arguments\n"));
6199			usage(B_FALSE);
6200		}
6201
6202		if ((zhp = zfs_open(g_zfs, argv[0],
6203		    ZFS_TYPE_FILESYSTEM)) == NULL) {
6204			ret = 1;
6205		} else {
6206			ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
6207			    options);
6208			zfs_close(zhp);
6209		}
6210	}
6211
6212	return (ret);
6213}
6214
6215/*
6216 * zfs mount -a [nfs]
6217 * zfs mount filesystem
6218 *
6219 * Mount all filesystems, or mount the given filesystem.
6220 */
6221static int
6222zfs_do_mount(int argc, char **argv)
6223{
6224	return (share_mount(OP_MOUNT, argc, argv));
6225}
6226
6227/*
6228 * zfs share -a [nfs | smb]
6229 * zfs share filesystem
6230 *
6231 * Share all filesystems, or share the given filesystem.
6232 */
6233static int
6234zfs_do_share(int argc, char **argv)
6235{
6236	return (share_mount(OP_SHARE, argc, argv));
6237}
6238
6239typedef struct unshare_unmount_node {
6240	zfs_handle_t	*un_zhp;
6241	char		*un_mountp;
6242	uu_avl_node_t	un_avlnode;
6243} unshare_unmount_node_t;
6244
6245/* ARGSUSED */
6246static int
6247unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
6248{
6249	const unshare_unmount_node_t *l = larg;
6250	const unshare_unmount_node_t *r = rarg;
6251
6252	return (strcmp(l->un_mountp, r->un_mountp));
6253}
6254
6255/*
6256 * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
6257 * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
6258 * and unmount it appropriately.
6259 */
6260static int
6261unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
6262{
6263	zfs_handle_t *zhp;
6264	int ret = 0;
6265	struct stat64 statbuf;
6266	struct extmnttab entry;
6267	const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
6268	ino_t path_inode;
6269
6270	/*
6271	 * Search for the path in /etc/mnttab.  Rather than looking for the
6272	 * specific path, which can be fooled by non-standard paths (i.e. ".."
6273	 * or "//"), we stat() the path and search for the corresponding
6274	 * (major,minor) device pair.
6275	 */
6276	if (stat64(path, &statbuf) != 0) {
6277		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
6278		    cmdname, path, strerror(errno));
6279		return (1);
6280	}
6281	path_inode = statbuf.st_ino;
6282
6283	/*
6284	 * Search for the given (major,minor) pair in the mount table.
6285	 */
6286#ifdef illumos
6287	rewind(mnttab_file);
6288	while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
6289		if (entry.mnt_major == major(statbuf.st_dev) &&
6290		    entry.mnt_minor == minor(statbuf.st_dev))
6291			break;
6292	}
6293#else
6294	{
6295		struct statfs sfs;
6296
6297		if (statfs(path, &sfs) != 0) {
6298			(void) fprintf(stderr, "%s: %s\n", path,
6299			    strerror(errno));
6300			ret = -1;
6301		}
6302		statfs2mnttab(&sfs, &entry);
6303	}
6304#endif
6305	if (ret != 0) {
6306		if (op == OP_SHARE) {
6307			(void) fprintf(stderr, gettext("cannot %s '%s': not "
6308			    "currently mounted\n"), cmdname, path);
6309			return (1);
6310		}
6311		(void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
6312		    path);
6313		if ((ret = umount2(path, flags)) != 0)
6314			(void) fprintf(stderr, gettext("%s: %s\n"), path,
6315			    strerror(errno));
6316		return (ret != 0);
6317	}
6318
6319	if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
6320		(void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
6321		    "filesystem\n"), cmdname, path);
6322		return (1);
6323	}
6324
6325	if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6326	    ZFS_TYPE_FILESYSTEM)) == NULL)
6327		return (1);
6328
6329	ret = 1;
6330	if (stat64(entry.mnt_mountp, &statbuf) != 0) {
6331		(void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
6332		    cmdname, path, strerror(errno));
6333		goto out;
6334	} else if (statbuf.st_ino != path_inode) {
6335		(void) fprintf(stderr, gettext("cannot "
6336		    "%s '%s': not a mountpoint\n"), cmdname, path);
6337		goto out;
6338	}
6339
6340	if (op == OP_SHARE) {
6341		char nfs_mnt_prop[ZFS_MAXPROPLEN];
6342		char smbshare_prop[ZFS_MAXPROPLEN];
6343
6344		verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
6345		    sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
6346		verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
6347		    sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
6348
6349		if (strcmp(nfs_mnt_prop, "off") == 0 &&
6350		    strcmp(smbshare_prop, "off") == 0) {
6351			(void) fprintf(stderr, gettext("cannot unshare "
6352			    "'%s': legacy share\n"), path);
6353#ifdef illumos
6354			(void) fprintf(stderr, gettext("use "
6355			    "unshare(1M) to unshare this filesystem\n"));
6356#endif
6357		} else if (!zfs_is_shared(zhp)) {
6358			(void) fprintf(stderr, gettext("cannot unshare '%s': "
6359			    "not currently shared\n"), path);
6360		} else {
6361			ret = zfs_unshareall_bypath(zhp, path);
6362		}
6363	} else {
6364		char mtpt_prop[ZFS_MAXPROPLEN];
6365
6366		verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
6367		    sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
6368
6369		if (is_manual) {
6370			ret = zfs_unmount(zhp, NULL, flags);
6371		} else if (strcmp(mtpt_prop, "legacy") == 0) {
6372			(void) fprintf(stderr, gettext("cannot unmount "
6373			    "'%s': legacy mountpoint\n"),
6374			    zfs_get_name(zhp));
6375			(void) fprintf(stderr, gettext("use umount(8) "
6376			    "to unmount this filesystem\n"));
6377		} else {
6378			ret = zfs_unmountall(zhp, flags);
6379		}
6380	}
6381
6382out:
6383	zfs_close(zhp);
6384
6385	return (ret != 0);
6386}
6387
6388/*
6389 * Generic callback for unsharing or unmounting a filesystem.
6390 */
6391static int
6392unshare_unmount(int op, int argc, char **argv)
6393{
6394	int do_all = 0;
6395	int flags = 0;
6396	int ret = 0;
6397	int c;
6398	zfs_handle_t *zhp;
6399	char nfs_mnt_prop[ZFS_MAXPROPLEN];
6400	char sharesmb[ZFS_MAXPROPLEN];
6401
6402	/* check options */
6403	while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
6404		switch (c) {
6405		case 'a':
6406			do_all = 1;
6407			break;
6408		case 'f':
6409			flags = MS_FORCE;
6410			break;
6411		case '?':
6412			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6413			    optopt);
6414			usage(B_FALSE);
6415		}
6416	}
6417
6418	argc -= optind;
6419	argv += optind;
6420
6421	if (do_all) {
6422		/*
6423		 * We could make use of zfs_for_each() to walk all datasets in
6424		 * the system, but this would be very inefficient, especially
6425		 * since we would have to linearly search /etc/mnttab for each
6426		 * one.  Instead, do one pass through /etc/mnttab looking for
6427		 * zfs entries and call zfs_unmount() for each one.
6428		 *
6429		 * Things get a little tricky if the administrator has created
6430		 * mountpoints beneath other ZFS filesystems.  In this case, we
6431		 * have to unmount the deepest filesystems first.  To accomplish
6432		 * this, we place all the mountpoints in an AVL tree sorted by
6433		 * the special type (dataset name), and walk the result in
6434		 * reverse to make sure to get any snapshots first.
6435		 */
6436		struct mnttab entry;
6437		uu_avl_pool_t *pool;
6438		uu_avl_t *tree = NULL;
6439		unshare_unmount_node_t *node;
6440		uu_avl_index_t idx;
6441		uu_avl_walk_t *walk;
6442
6443		if (argc != 0) {
6444			(void) fprintf(stderr, gettext("too many arguments\n"));
6445			usage(B_FALSE);
6446		}
6447
6448		if (((pool = uu_avl_pool_create("unmount_pool",
6449		    sizeof (unshare_unmount_node_t),
6450		    offsetof(unshare_unmount_node_t, un_avlnode),
6451		    unshare_unmount_compare, UU_DEFAULT)) == NULL) ||
6452		    ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL))
6453			nomem();
6454
6455		rewind(mnttab_file);
6456		while (getmntent(mnttab_file, &entry) == 0) {
6457
6458			/* ignore non-ZFS entries */
6459			if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
6460				continue;
6461
6462			/* ignore snapshots */
6463			if (strchr(entry.mnt_special, '@') != NULL)
6464				continue;
6465
6466			if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6467			    ZFS_TYPE_FILESYSTEM)) == NULL) {
6468				ret = 1;
6469				continue;
6470			}
6471
6472			/*
6473			 * Ignore datasets that are excluded/restricted by
6474			 * parent pool name.
6475			 */
6476			if (zpool_skip_pool(zfs_get_pool_name(zhp))) {
6477				zfs_close(zhp);
6478				continue;
6479			}
6480
6481			switch (op) {
6482			case OP_SHARE:
6483				verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6484				    nfs_mnt_prop,
6485				    sizeof (nfs_mnt_prop),
6486				    NULL, NULL, 0, B_FALSE) == 0);
6487				if (strcmp(nfs_mnt_prop, "off") != 0)
6488					break;
6489				verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6490				    nfs_mnt_prop,
6491				    sizeof (nfs_mnt_prop),
6492				    NULL, NULL, 0, B_FALSE) == 0);
6493				if (strcmp(nfs_mnt_prop, "off") == 0)
6494					continue;
6495				break;
6496			case OP_MOUNT:
6497				/* Ignore legacy mounts */
6498				verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
6499				    nfs_mnt_prop,
6500				    sizeof (nfs_mnt_prop),
6501				    NULL, NULL, 0, B_FALSE) == 0);
6502				if (strcmp(nfs_mnt_prop, "legacy") == 0)
6503					continue;
6504				/* Ignore canmount=noauto mounts */
6505				if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
6506				    ZFS_CANMOUNT_NOAUTO)
6507					continue;
6508			default:
6509				break;
6510			}
6511
6512			node = safe_malloc(sizeof (unshare_unmount_node_t));
6513			node->un_zhp = zhp;
6514			node->un_mountp = safe_strdup(entry.mnt_mountp);
6515
6516			uu_avl_node_init(node, &node->un_avlnode, pool);
6517
6518			if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
6519				uu_avl_insert(tree, node, idx);
6520			} else {
6521				zfs_close(node->un_zhp);
6522				free(node->un_mountp);
6523				free(node);
6524			}
6525		}
6526
6527		/*
6528		 * Walk the AVL tree in reverse, unmounting each filesystem and
6529		 * removing it from the AVL tree in the process.
6530		 */
6531		if ((walk = uu_avl_walk_start(tree,
6532		    UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL)
6533			nomem();
6534
6535		while ((node = uu_avl_walk_next(walk)) != NULL) {
6536			uu_avl_remove(tree, node);
6537
6538			switch (op) {
6539			case OP_SHARE:
6540				if (zfs_unshareall_bypath(node->un_zhp,
6541				    node->un_mountp) != 0)
6542					ret = 1;
6543				break;
6544
6545			case OP_MOUNT:
6546				if (zfs_unmount(node->un_zhp,
6547				    node->un_mountp, flags) != 0)
6548					ret = 1;
6549				break;
6550			}
6551
6552			zfs_close(node->un_zhp);
6553			free(node->un_mountp);
6554			free(node);
6555		}
6556
6557		uu_avl_walk_end(walk);
6558		uu_avl_destroy(tree);
6559		uu_avl_pool_destroy(pool);
6560
6561	} else {
6562		if (argc != 1) {
6563			if (argc == 0)
6564				(void) fprintf(stderr,
6565				    gettext("missing filesystem argument\n"));
6566			else
6567				(void) fprintf(stderr,
6568				    gettext("too many arguments\n"));
6569			usage(B_FALSE);
6570		}
6571
6572		/*
6573		 * We have an argument, but it may be a full path or a ZFS
6574		 * filesystem.  Pass full paths off to unmount_path() (shared by
6575		 * manual_unmount), otherwise open the filesystem and pass to
6576		 * zfs_unmount().
6577		 */
6578		if (argv[0][0] == '/')
6579			return (unshare_unmount_path(op, argv[0],
6580			    flags, B_FALSE));
6581
6582		if ((zhp = zfs_open(g_zfs, argv[0],
6583		    ZFS_TYPE_FILESYSTEM)) == NULL)
6584			return (1);
6585
6586		verify(zfs_prop_get(zhp, op == OP_SHARE ?
6587		    ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
6588		    nfs_mnt_prop, sizeof (nfs_mnt_prop), NULL,
6589		    NULL, 0, B_FALSE) == 0);
6590
6591		switch (op) {
6592		case OP_SHARE:
6593			verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6594			    nfs_mnt_prop,
6595			    sizeof (nfs_mnt_prop),
6596			    NULL, NULL, 0, B_FALSE) == 0);
6597			verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6598			    sharesmb, sizeof (sharesmb), NULL, NULL,
6599			    0, B_FALSE) == 0);
6600
6601			if (strcmp(nfs_mnt_prop, "off") == 0 &&
6602			    strcmp(sharesmb, "off") == 0) {
6603				(void) fprintf(stderr, gettext("cannot "
6604				    "unshare '%s': legacy share\n"),
6605				    zfs_get_name(zhp));
6606#ifdef illumos
6607				(void) fprintf(stderr, gettext("use "
6608				    "unshare(1M) to unshare this "
6609				    "filesystem\n"));
6610#endif
6611				ret = 1;
6612			} else if (!zfs_is_shared(zhp)) {
6613				(void) fprintf(stderr, gettext("cannot "
6614				    "unshare '%s': not currently "
6615				    "shared\n"), zfs_get_name(zhp));
6616				ret = 1;
6617			} else if (zfs_unshareall(zhp) != 0) {
6618				ret = 1;
6619			}
6620			break;
6621
6622		case OP_MOUNT:
6623			if (strcmp(nfs_mnt_prop, "legacy") == 0) {
6624				(void) fprintf(stderr, gettext("cannot "
6625				    "unmount '%s': legacy "
6626				    "mountpoint\n"), zfs_get_name(zhp));
6627				(void) fprintf(stderr, gettext("use "
6628				    "umount(8) to unmount this "
6629				    "filesystem\n"));
6630				ret = 1;
6631			} else if (!zfs_is_mounted(zhp, NULL)) {
6632				(void) fprintf(stderr, gettext("cannot "
6633				    "unmount '%s': not currently "
6634				    "mounted\n"),
6635				    zfs_get_name(zhp));
6636				ret = 1;
6637			} else if (zfs_unmountall(zhp, flags) != 0) {
6638				ret = 1;
6639			}
6640			break;
6641		}
6642
6643		zfs_close(zhp);
6644	}
6645
6646	return (ret);
6647}
6648
6649/*
6650 * zfs unmount -a
6651 * zfs unmount filesystem
6652 *
6653 * Unmount all filesystems, or a specific ZFS filesystem.
6654 */
6655static int
6656zfs_do_unmount(int argc, char **argv)
6657{
6658	return (unshare_unmount(OP_MOUNT, argc, argv));
6659}
6660
6661/*
6662 * zfs unshare -a
6663 * zfs unshare filesystem
6664 *
6665 * Unshare all filesystems, or a specific ZFS filesystem.
6666 */
6667static int
6668zfs_do_unshare(int argc, char **argv)
6669{
6670	return (unshare_unmount(OP_SHARE, argc, argv));
6671}
6672
6673/*
6674 * Attach/detach the given dataset to/from the given jail
6675 */
6676/* ARGSUSED */
6677static int
6678do_jail(int argc, char **argv, int attach)
6679{
6680	zfs_handle_t *zhp;
6681	int jailid, ret;
6682
6683	/* check number of arguments */
6684	if (argc < 3) {
6685		(void) fprintf(stderr, gettext("missing argument(s)\n"));
6686		usage(B_FALSE);
6687	}
6688	if (argc > 3) {
6689		(void) fprintf(stderr, gettext("too many arguments\n"));
6690		usage(B_FALSE);
6691	}
6692
6693	jailid = jail_getid(argv[1]);
6694	if (jailid < 0) {
6695		(void) fprintf(stderr, gettext("invalid jail id or name\n"));
6696		usage(B_FALSE);
6697	}
6698
6699	zhp = zfs_open(g_zfs, argv[2], ZFS_TYPE_FILESYSTEM);
6700	if (zhp == NULL)
6701		return (1);
6702
6703	ret = (zfs_jail(zhp, jailid, attach) != 0);
6704
6705	zfs_close(zhp);
6706	return (ret);
6707}
6708
6709/*
6710 * zfs jail jailid filesystem
6711 *
6712 * Attach the given dataset to the given jail
6713 */
6714/* ARGSUSED */
6715static int
6716zfs_do_jail(int argc, char **argv)
6717{
6718
6719	return (do_jail(argc, argv, 1));
6720}
6721
6722/*
6723 * zfs unjail jailid filesystem
6724 *
6725 * Detach the given dataset from the given jail
6726 */
6727/* ARGSUSED */
6728static int
6729zfs_do_unjail(int argc, char **argv)
6730{
6731
6732	return (do_jail(argc, argv, 0));
6733}
6734
6735/*
6736 * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
6737 * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
6738 */
6739static int
6740manual_mount(int argc, char **argv)
6741{
6742	zfs_handle_t *zhp;
6743	char mountpoint[ZFS_MAXPROPLEN];
6744	char mntopts[MNT_LINE_MAX] = { '\0' };
6745	int ret = 0;
6746	int c;
6747	int flags = 0;
6748	char *dataset, *path;
6749
6750	/* check options */
6751	while ((c = getopt(argc, argv, ":mo:O")) != -1) {
6752		switch (c) {
6753		case 'o':
6754			(void) strlcpy(mntopts, optarg, sizeof (mntopts));
6755			break;
6756		case 'O':
6757			flags |= MS_OVERLAY;
6758			break;
6759		case 'm':
6760			flags |= MS_NOMNTTAB;
6761			break;
6762		case ':':
6763			(void) fprintf(stderr, gettext("missing argument for "
6764			    "'%c' option\n"), optopt);
6765			usage(B_FALSE);
6766			break;
6767		case '?':
6768			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6769			    optopt);
6770			(void) fprintf(stderr, gettext("usage: mount [-o opts] "
6771			    "<path>\n"));
6772			return (2);
6773		}
6774	}
6775
6776	argc -= optind;
6777	argv += optind;
6778
6779	/* check that we only have two arguments */
6780	if (argc != 2) {
6781		if (argc == 0)
6782			(void) fprintf(stderr, gettext("missing dataset "
6783			    "argument\n"));
6784		else if (argc == 1)
6785			(void) fprintf(stderr,
6786			    gettext("missing mountpoint argument\n"));
6787		else
6788			(void) fprintf(stderr, gettext("too many arguments\n"));
6789		(void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
6790		return (2);
6791	}
6792
6793	dataset = argv[0];
6794	path = argv[1];
6795
6796	/* try to open the dataset */
6797	if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
6798		return (1);
6799
6800	(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
6801	    sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
6802
6803	/* check for legacy mountpoint and complain appropriately */
6804	ret = 0;
6805	if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
6806		if (zmount(dataset, path, flags, MNTTYPE_ZFS,
6807		    NULL, 0, mntopts, sizeof (mntopts)) != 0) {
6808			(void) fprintf(stderr, gettext("mount failed: %s\n"),
6809			    strerror(errno));
6810			ret = 1;
6811		}
6812	} else {
6813		(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
6814		    "mounted using 'mount -t zfs'\n"), dataset);
6815		(void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
6816		    "instead.\n"), path);
6817		(void) fprintf(stderr, gettext("If you must use 'mount -t zfs' "
6818		    "or /etc/fstab, use 'zfs set mountpoint=legacy'.\n"));
6819		(void) fprintf(stderr, gettext("See zfs(8) for more "
6820		    "information.\n"));
6821		ret = 1;
6822	}
6823
6824	return (ret);
6825}
6826
6827/*
6828 * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
6829 * unmounts of non-legacy filesystems, as this is the dominant administrative
6830 * interface.
6831 */
6832static int
6833manual_unmount(int argc, char **argv)
6834{
6835	int flags = 0;
6836	int c;
6837
6838	/* check options */
6839	while ((c = getopt(argc, argv, "f")) != -1) {
6840		switch (c) {
6841		case 'f':
6842			flags = MS_FORCE;
6843			break;
6844		case '?':
6845			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
6846			    optopt);
6847			(void) fprintf(stderr, gettext("usage: unmount [-f] "
6848			    "<path>\n"));
6849			return (2);
6850		}
6851	}
6852
6853	argc -= optind;
6854	argv += optind;
6855
6856	/* check arguments */
6857	if (argc != 1) {
6858		if (argc == 0)
6859			(void) fprintf(stderr, gettext("missing path "
6860			    "argument\n"));
6861		else
6862			(void) fprintf(stderr, gettext("too many arguments\n"));
6863		(void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
6864		return (2);
6865	}
6866
6867	return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
6868}
6869
6870static int
6871find_command_idx(char *command, int *idx)
6872{
6873	int i;
6874
6875	for (i = 0; i < NCOMMAND; i++) {
6876		if (command_table[i].name == NULL)
6877			continue;
6878
6879		if (strcmp(command, command_table[i].name) == 0) {
6880			*idx = i;
6881			return (0);
6882		}
6883	}
6884	return (1);
6885}
6886
6887static int
6888zfs_do_diff(int argc, char **argv)
6889{
6890	zfs_handle_t *zhp;
6891	int flags = 0;
6892	char *tosnap = NULL;
6893	char *fromsnap = NULL;
6894	char *atp, *copy;
6895	int err = 0;
6896	int c;
6897
6898	while ((c = getopt(argc, argv, "FHt")) != -1) {
6899		switch (c) {
6900		case 'F':
6901			flags |= ZFS_DIFF_CLASSIFY;
6902			break;
6903		case 'H':
6904			flags |= ZFS_DIFF_PARSEABLE;
6905			break;
6906		case 't':
6907			flags |= ZFS_DIFF_TIMESTAMP;
6908			break;
6909		default:
6910			(void) fprintf(stderr,
6911			    gettext("invalid option '%c'\n"), optopt);
6912			usage(B_FALSE);
6913		}
6914	}
6915
6916	argc -= optind;
6917	argv += optind;
6918
6919	if (argc < 1) {
6920		(void) fprintf(stderr,
6921		gettext("must provide at least one snapshot name\n"));
6922		usage(B_FALSE);
6923	}
6924
6925	if (argc > 2) {
6926		(void) fprintf(stderr, gettext("too many arguments\n"));
6927		usage(B_FALSE);
6928	}
6929
6930	fromsnap = argv[0];
6931	tosnap = (argc == 2) ? argv[1] : NULL;
6932
6933	copy = NULL;
6934	if (*fromsnap != '@')
6935		copy = strdup(fromsnap);
6936	else if (tosnap)
6937		copy = strdup(tosnap);
6938	if (copy == NULL)
6939		usage(B_FALSE);
6940
6941	if ((atp = strchr(copy, '@')) != NULL)
6942		*atp = '\0';
6943
6944	if ((zhp = zfs_open(g_zfs, copy, ZFS_TYPE_FILESYSTEM)) == NULL)
6945		return (1);
6946
6947	free(copy);
6948
6949	/*
6950	 * Ignore SIGPIPE so that the library can give us
6951	 * information on any failure
6952	 */
6953	(void) sigignore(SIGPIPE);
6954
6955	err = zfs_show_diffs(zhp, STDOUT_FILENO, fromsnap, tosnap, flags);
6956
6957	zfs_close(zhp);
6958
6959	return (err != 0);
6960}
6961
6962/*
6963 * zfs bookmark <fs@snap> <fs#bmark>
6964 *
6965 * Creates a bookmark with the given name from the given snapshot.
6966 */
6967static int
6968zfs_do_bookmark(int argc, char **argv)
6969{
6970	char snapname[ZFS_MAXNAMELEN];
6971	zfs_handle_t *zhp;
6972	nvlist_t *nvl;
6973	int ret = 0;
6974	int c;
6975
6976	/* check options */
6977	while ((c = getopt(argc, argv, "")) != -1) {
6978		switch (c) {
6979		case '?':
6980			(void) fprintf(stderr,
6981			    gettext("invalid option '%c'\n"), optopt);
6982			goto usage;
6983		}
6984	}
6985
6986	argc -= optind;
6987	argv += optind;
6988
6989	/* check number of arguments */
6990	if (argc < 1) {
6991		(void) fprintf(stderr, gettext("missing snapshot argument\n"));
6992		goto usage;
6993	}
6994	if (argc < 2) {
6995		(void) fprintf(stderr, gettext("missing bookmark argument\n"));
6996		goto usage;
6997	}
6998
6999	if (strchr(argv[1], '#') == NULL) {
7000		(void) fprintf(stderr,
7001		    gettext("invalid bookmark name '%s' -- "
7002		    "must contain a '#'\n"), argv[1]);
7003		goto usage;
7004	}
7005
7006	if (argv[0][0] == '@') {
7007		/*
7008		 * Snapshot name begins with @.
7009		 * Default to same fs as bookmark.
7010		 */
7011		(void) strncpy(snapname, argv[1], sizeof (snapname));
7012		*strchr(snapname, '#') = '\0';
7013		(void) strlcat(snapname, argv[0], sizeof (snapname));
7014	} else {
7015		(void) strncpy(snapname, argv[0], sizeof (snapname));
7016	}
7017	zhp = zfs_open(g_zfs, snapname, ZFS_TYPE_SNAPSHOT);
7018	if (zhp == NULL)
7019		goto usage;
7020	zfs_close(zhp);
7021
7022
7023	nvl = fnvlist_alloc();
7024	fnvlist_add_string(nvl, argv[1], snapname);
7025	ret = lzc_bookmark(nvl, NULL);
7026	fnvlist_free(nvl);
7027
7028	if (ret != 0) {
7029		const char *err_msg;
7030		char errbuf[1024];
7031
7032		(void) snprintf(errbuf, sizeof (errbuf),
7033		    dgettext(TEXT_DOMAIN,
7034		    "cannot create bookmark '%s'"), argv[1]);
7035
7036		switch (ret) {
7037		case EXDEV:
7038			err_msg = "bookmark is in a different pool";
7039			break;
7040		case EEXIST:
7041			err_msg = "bookmark exists";
7042			break;
7043		case EINVAL:
7044			err_msg = "invalid argument";
7045			break;
7046		case ENOTSUP:
7047			err_msg = "bookmark feature not enabled";
7048			break;
7049		case ENOSPC:
7050			err_msg = "out of space";
7051			break;
7052		default:
7053			err_msg = "unknown error";
7054			break;
7055		}
7056		(void) fprintf(stderr, "%s: %s\n", errbuf,
7057		    dgettext(TEXT_DOMAIN, err_msg));
7058	}
7059
7060	return (ret != 0);
7061
7062usage:
7063	usage(B_FALSE);
7064	return (-1);
7065}
7066
7067int
7068main(int argc, char **argv)
7069{
7070	int ret = 0;
7071	int i;
7072	char *progname;
7073	char *cmdname;
7074
7075	(void) setlocale(LC_ALL, "");
7076	(void) textdomain(TEXT_DOMAIN);
7077
7078	opterr = 0;
7079
7080	if ((g_zfs = libzfs_init()) == NULL) {
7081		(void) fprintf(stderr, gettext("internal error: failed to "
7082		    "initialize ZFS library\n"));
7083		return (1);
7084	}
7085
7086	zfs_save_arguments(argc, argv, history_str, sizeof (history_str));
7087
7088	libzfs_print_on_error(g_zfs, B_TRUE);
7089
7090	if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
7091		(void) fprintf(stderr, gettext("internal error: unable to "
7092		    "open %s\n"), MNTTAB);
7093		return (1);
7094	}
7095
7096	/*
7097	 * This command also doubles as the /etc/fs mount and unmount program.
7098	 * Determine if we should take this behavior based on argv[0].
7099	 */
7100	progname = basename(argv[0]);
7101	if (strcmp(progname, "mount") == 0) {
7102		ret = manual_mount(argc, argv);
7103	} else if (strcmp(progname, "umount") == 0) {
7104		ret = manual_unmount(argc, argv);
7105	} else {
7106		/*
7107		 * Make sure the user has specified some command.
7108		 */
7109		if (argc < 2) {
7110			(void) fprintf(stderr, gettext("missing command\n"));
7111			usage(B_FALSE);
7112		}
7113
7114		cmdname = argv[1];
7115
7116		/*
7117		 * The 'umount' command is an alias for 'unmount'
7118		 */
7119		if (strcmp(cmdname, "umount") == 0)
7120			cmdname = "unmount";
7121
7122		/*
7123		 * The 'recv' command is an alias for 'receive'
7124		 */
7125		if (strcmp(cmdname, "recv") == 0)
7126			cmdname = "receive";
7127
7128		/*
7129		 * The 'snap' command is an alias for 'snapshot'
7130		 */
7131		if (strcmp(cmdname, "snap") == 0)
7132			cmdname = "snapshot";
7133
7134		/*
7135		 * Special case '-?'
7136		 */
7137		if (strcmp(cmdname, "-?") == 0)
7138			usage(B_TRUE);
7139
7140		/*
7141		 * Run the appropriate command.
7142		 */
7143		libzfs_mnttab_cache(g_zfs, B_TRUE);
7144		if (find_command_idx(cmdname, &i) == 0) {
7145			current_command = &command_table[i];
7146			ret = command_table[i].func(argc - 1, argv + 1);
7147		} else if (strchr(cmdname, '=') != NULL) {
7148			verify(find_command_idx("set", &i) == 0);
7149			current_command = &command_table[i];
7150			ret = command_table[i].func(argc, argv);
7151		} else {
7152			(void) fprintf(stderr, gettext("unrecognized "
7153			    "command '%s'\n"), cmdname);
7154			usage(B_FALSE);
7155		}
7156		libzfs_mnttab_cache(g_zfs, B_FALSE);
7157	}
7158
7159	(void) fclose(mnttab_file);
7160
7161	if (ret == 0 && log_history)
7162		(void) zpool_log_history(g_zfs, history_str);
7163
7164	libzfs_fini(g_zfs);
7165
7166	/*
7167	 * The 'ZFS_ABORT' environment variable causes us to dump core on exit
7168	 * for the purposes of running ::findleaks.
7169	 */
7170	if (getenv("ZFS_ABORT") != NULL) {
7171		(void) printf("dumping core by request\n");
7172		abort();
7173	}
7174
7175	return (ret);
7176}
7177