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.
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.
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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2013 by Delphix. All rights reserved.
42 * This is a private interface used to gather up all the datasets specified on
43 * the command line so that we can iterate over them in order.
45 * First, we iterate over all filesystems, gathering them together into an
46 * AVL tree. We report errors for any explicitly specified datasets
47 * that we couldn't open.
49 * When finished, we have an AVL tree of ZFS handles. We go through and execute
50 * the provided callback for each one, passing whatever data the user supplied.
53 typedef struct zfs_node {
54 zfs_handle_t *zn_handle;
55 uu_avl_node_t zn_avlnode;
58 typedef struct callback_data {
62 zfs_sort_column_t *cb_sortcol;
63 zprop_list_t **cb_proplist;
66 uint8_t cb_props_table[ZFS_NUM_PROPS];
69 uu_avl_pool_t *avl_pool;
72 * Include snaps if they were requested or if this a zfs list where types
73 * were not specified and the "listsnapshots" property is set on this pool.
76 zfs_include_snapshots(zfs_handle_t *zhp, callback_data_t *cb)
80 if ((cb->cb_flags & ZFS_ITER_PROP_LISTSNAPS) == 0)
81 return (cb->cb_types & ZFS_TYPE_SNAPSHOT);
83 zph = zfs_get_pool_handle(zhp);
84 return (zpool_get_prop_int(zph, ZPOOL_PROP_LISTSNAPS, NULL));
88 * Called for each dataset. If the object is of an appropriate type,
89 * add it to the avl tree and recurse over any children as necessary.
92 zfs_callback(zfs_handle_t *zhp, void *data)
94 callback_data_t *cb = data;
95 boolean_t should_close = B_TRUE;
96 boolean_t include_snaps = zfs_include_snapshots(zhp, cb);
97 boolean_t include_bmarks = (cb->cb_types & ZFS_TYPE_BOOKMARK);
99 if ((zfs_get_type(zhp) & cb->cb_types) ||
100 ((zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT) && include_snaps)) {
102 zfs_node_t *node = safe_malloc(sizeof (zfs_node_t));
104 node->zn_handle = zhp;
105 uu_avl_node_init(node, &node->zn_avlnode, avl_pool);
106 if (uu_avl_find(cb->cb_avl, node, cb->cb_sortcol,
108 if (cb->cb_proplist) {
109 if ((*cb->cb_proplist) &&
110 !(*cb->cb_proplist)->pl_all)
111 zfs_prune_proplist(zhp,
114 if (zfs_expand_proplist(zhp, cb->cb_proplist,
115 (cb->cb_flags & ZFS_ITER_RECVD_PROPS),
116 (cb->cb_flags & ZFS_ITER_LITERAL_PROPS))
122 uu_avl_insert(cb->cb_avl, node, idx);
123 should_close = B_FALSE;
130 * Recurse if necessary.
132 if (cb->cb_flags & ZFS_ITER_RECURSE &&
133 ((cb->cb_flags & ZFS_ITER_DEPTH_LIMIT) == 0 ||
134 cb->cb_depth < cb->cb_depth_limit)) {
138 * If we are not looking for filesystems, we don't need to
139 * recurse into filesystems when we are at our depth limit.
141 if ((cb->cb_depth < cb->cb_depth_limit ||
142 (cb->cb_flags & ZFS_ITER_DEPTH_LIMIT) == 0 ||
144 (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME))) &&
145 zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
146 (void) zfs_iter_filesystems(zhp, zfs_callback, data);
149 if (((zfs_get_type(zhp) & (ZFS_TYPE_SNAPSHOT |
150 ZFS_TYPE_BOOKMARK)) == 0) && include_snaps) {
151 (void) zfs_iter_snapshots(zhp,
152 (cb->cb_flags & ZFS_ITER_SIMPLE) != 0,
153 zfs_callback, data, 0, 0);
156 if (((zfs_get_type(zhp) & (ZFS_TYPE_SNAPSHOT |
157 ZFS_TYPE_BOOKMARK)) == 0) && include_bmarks) {
158 (void) zfs_iter_bookmarks(zhp, zfs_callback, data);
171 zfs_add_sort_column(zfs_sort_column_t **sc, const char *name,
174 zfs_sort_column_t *col;
177 if ((prop = zfs_name_to_prop(name)) == ZPROP_INVAL &&
178 !zfs_prop_user(name))
181 col = safe_malloc(sizeof (zfs_sort_column_t));
184 col->sc_reverse = reverse;
185 if (prop == ZPROP_INVAL) {
186 col->sc_user_prop = safe_malloc(strlen(name) + 1);
187 (void) strcpy(col->sc_user_prop, name);
194 (*sc)->sc_last->sc_next = col;
195 (*sc)->sc_last = col;
202 zfs_free_sort_columns(zfs_sort_column_t *sc)
204 zfs_sort_column_t *col;
208 free(sc->sc_user_prop);
215 zfs_sort_only_by_name(const zfs_sort_column_t *sc)
217 return (sc != NULL && sc->sc_next == NULL &&
218 sc->sc_prop == ZFS_PROP_NAME);
222 zfs_compare(const void *larg, const void *rarg)
224 zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle;
225 zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle;
226 const char *lname = zfs_get_name(l);
227 const char *rname = zfs_get_name(r);
229 uint64_t lcreate, rcreate;
232 lat = (char *)strchr(lname, '@');
233 rat = (char *)strchr(rname, '@');
240 ret = strcmp(lname, rname);
241 if (ret == 0 && (lat != NULL || rat != NULL)) {
243 * If we're comparing a dataset to one of its snapshots, we
244 * always make the full dataset first.
248 } else if (rat == NULL) {
252 * If we have two snapshots from the same dataset, then
253 * we want to sort them according to creation time. We
254 * use the hidden CREATETXG property to get an absolute
255 * ordering of snapshots.
257 lcreate = zfs_prop_get_int(l, ZFS_PROP_CREATETXG);
258 rcreate = zfs_prop_get_int(r, ZFS_PROP_CREATETXG);
261 * Both lcreate and rcreate being 0 means we don't have
262 * properties and we should compare full name.
264 if (lcreate == 0 && rcreate == 0)
265 ret = strcmp(lat + 1, rat + 1);
266 else if (lcreate < rcreate)
268 else if (lcreate > rcreate)
282 * Sort datasets by specified columns.
284 * o Numeric types sort in ascending order.
285 * o String types sort in alphabetical order.
286 * o Types inappropriate for a row sort that row to the literal
287 * bottom, regardless of the specified ordering.
289 * If no sort columns are specified, or two datasets compare equally
290 * across all specified columns, they are sorted alphabetically by name
291 * with snapshots grouped under their parents.
294 zfs_sort(const void *larg, const void *rarg, void *data)
296 zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle;
297 zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle;
298 zfs_sort_column_t *sc = (zfs_sort_column_t *)data;
299 zfs_sort_column_t *psc;
301 for (psc = sc; psc != NULL; psc = psc->sc_next) {
302 char lbuf[ZFS_MAXPROPLEN], rbuf[ZFS_MAXPROPLEN];
305 boolean_t lvalid, rvalid;
309 * We group the checks below the generic code. If 'lstr' and
310 * 'rstr' are non-NULL, then we do a string based comparison.
311 * Otherwise, we compare 'lnum' and 'rnum'.
314 if (psc->sc_prop == ZPROP_INVAL) {
315 nvlist_t *luser, *ruser;
316 nvlist_t *lval, *rval;
318 luser = zfs_get_user_props(l);
319 ruser = zfs_get_user_props(r);
321 lvalid = (nvlist_lookup_nvlist(luser,
322 psc->sc_user_prop, &lval) == 0);
323 rvalid = (nvlist_lookup_nvlist(ruser,
324 psc->sc_user_prop, &rval) == 0);
327 verify(nvlist_lookup_string(lval,
328 ZPROP_VALUE, &lstr) == 0);
330 verify(nvlist_lookup_string(rval,
331 ZPROP_VALUE, &rstr) == 0);
332 } else if (psc->sc_prop == ZFS_PROP_NAME) {
333 lvalid = rvalid = B_TRUE;
335 (void) strlcpy(lbuf, zfs_get_name(l), sizeof (lbuf));
336 (void) strlcpy(rbuf, zfs_get_name(r), sizeof (rbuf));
340 } else if (zfs_prop_is_string(psc->sc_prop)) {
341 lvalid = (zfs_prop_get(l, psc->sc_prop, lbuf,
342 sizeof (lbuf), NULL, NULL, 0, B_TRUE) == 0);
343 rvalid = (zfs_prop_get(r, psc->sc_prop, rbuf,
344 sizeof (rbuf), NULL, NULL, 0, B_TRUE) == 0);
349 lvalid = zfs_prop_valid_for_type(psc->sc_prop,
350 zfs_get_type(l), B_FALSE);
351 rvalid = zfs_prop_valid_for_type(psc->sc_prop,
352 zfs_get_type(r), B_FALSE);
355 (void) zfs_prop_get_numeric(l, psc->sc_prop,
356 &lnum, NULL, NULL, 0);
358 (void) zfs_prop_get_numeric(r, psc->sc_prop,
359 &rnum, NULL, NULL, 0);
362 if (!lvalid && !rvalid)
370 ret = strcmp(lstr, rstr);
371 else if (lnum < rnum)
373 else if (lnum > rnum)
377 if (psc->sc_reverse == B_TRUE)
378 ret = (ret < 0) ? 1 : -1;
383 return (zfs_compare(larg, rarg));
387 zfs_for_each(int argc, char **argv, int flags, zfs_type_t types,
388 zfs_sort_column_t *sortcol, zprop_list_t **proplist, int limit,
389 zfs_iter_f callback, void *data)
391 callback_data_t cb = {0};
396 avl_pool = uu_avl_pool_create("zfs_pool", sizeof (zfs_node_t),
397 offsetof(zfs_node_t, zn_avlnode), zfs_sort, UU_DEFAULT);
399 if (avl_pool == NULL)
402 cb.cb_sortcol = sortcol;
404 cb.cb_proplist = proplist;
406 cb.cb_depth_limit = limit;
408 * If cb_proplist is provided then in the zfs_handles created we
409 * retain only those properties listed in cb_proplist and sortcol.
410 * The rest are pruned. So, the caller should make sure that no other
411 * properties other than those listed in cb_proplist/sortcol are
414 * If cb_proplist is NULL then we retain all the properties. We
415 * always retain the zoned property, which some other properties
416 * need (userquota & friends), and the createtxg property, which
417 * we need to sort snapshots.
419 if (cb.cb_proplist && *cb.cb_proplist) {
420 zprop_list_t *p = *cb.cb_proplist;
423 if (p->pl_prop >= ZFS_PROP_TYPE &&
424 p->pl_prop < ZFS_NUM_PROPS) {
425 cb.cb_props_table[p->pl_prop] = B_TRUE;
431 if (sortcol->sc_prop >= ZFS_PROP_TYPE &&
432 sortcol->sc_prop < ZFS_NUM_PROPS) {
433 cb.cb_props_table[sortcol->sc_prop] = B_TRUE;
435 sortcol = sortcol->sc_next;
438 cb.cb_props_table[ZFS_PROP_ZONED] = B_TRUE;
439 cb.cb_props_table[ZFS_PROP_CREATETXG] = B_TRUE;
441 (void) memset(cb.cb_props_table, B_TRUE,
442 sizeof (cb.cb_props_table));
445 if ((cb.cb_avl = uu_avl_create(avl_pool, NULL, UU_DEFAULT)) == NULL)
450 * If given no arguments, iterate over all datasets.
452 cb.cb_flags |= ZFS_ITER_RECURSE;
453 ret = zfs_iter_root(g_zfs, zfs_callback, &cb);
455 zfs_handle_t *zhp = NULL;
456 zfs_type_t argtype = types;
459 * If we're recursive, then we always allow filesystems as
460 * arguments. If we also are interested in snapshots or
461 * bookmarks, then we can take volumes as well.
463 if (flags & ZFS_ITER_RECURSE) {
464 argtype |= ZFS_TYPE_FILESYSTEM;
465 if (types & (ZFS_TYPE_SNAPSHOT | ZFS_TYPE_BOOKMARK))
466 argtype |= ZFS_TYPE_VOLUME;
469 for (int i = 0; i < argc; i++) {
470 if (flags & ZFS_ITER_ARGS_CAN_BE_PATHS) {
471 zhp = zfs_path_to_zhandle(g_zfs, argv[i],
474 zhp = zfs_open(g_zfs, argv[i], argtype);
477 ret |= zfs_callback(zhp, &cb);
484 * At this point we've got our AVL tree full of zfs handles, so iterate
485 * over each one and execute the real user callback.
487 for (node = uu_avl_first(cb.cb_avl); node != NULL;
488 node = uu_avl_next(cb.cb_avl, node))
489 ret |= callback(node->zn_handle, data);
492 * Finally, clean up the AVL tree.
494 if ((walk = uu_avl_walk_start(cb.cb_avl, UU_WALK_ROBUST)) == NULL)
497 while ((node = uu_avl_walk_next(walk)) != NULL) {
498 uu_avl_remove(cb.cb_avl, node);
499 zfs_close(node->zn_handle);
503 uu_avl_walk_end(walk);
504 uu_avl_destroy(cb.cb_avl);
505 uu_avl_pool_destroy(avl_pool);