2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
5 * Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 #include <sys/zfs_context.h>
31 #include <libzfsbootenv.h>
36 static int snapshot_proplist_update(zfs_handle_t *hdl, prop_data_t *data);
39 * Returns the name of the active boot environment
42 be_active_name(libbe_handle_t *lbh)
45 if (*lbh->rootfs != '\0')
46 return (strrchr(lbh->rootfs, '/') + sizeof(char));
53 * Returns full path of the active boot environment
56 be_active_path(libbe_handle_t *lbh)
63 * Returns the name of the next active boot environment
66 be_nextboot_name(libbe_handle_t *lbh)
69 if (*lbh->bootfs != '\0')
70 return (strrchr(lbh->bootfs, '/') + sizeof(char));
77 * Returns full path of the active boot environment
80 be_nextboot_path(libbe_handle_t *lbh)
88 * Returns the path of the boot environment root dataset
91 be_root_path(libbe_handle_t *lbh)
99 * Populates dsnvl with one nvlist per bootenv dataset describing the properties
100 * of that dataset that we've declared ourselves to care about.
103 be_get_bootenv_props(libbe_handle_t *lbh, nvlist_t *dsnvl)
109 data.single_object = false;
110 data.bootonce = NULL;
111 return (be_proplist_update(&data));
115 be_get_dataset_props(libbe_handle_t *lbh, const char *name, nvlist_t *props)
117 zfs_handle_t *snap_hdl;
123 data.single_object = true;
124 data.bootonce = NULL;
125 if ((snap_hdl = zfs_open(lbh->lzh, name,
126 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT)) == NULL)
127 return (BE_ERR_ZFSOPEN);
129 ret = prop_list_builder_cb(snap_hdl, &data);
135 be_get_dataset_snapshots(libbe_handle_t *lbh, const char *name, nvlist_t *props)
137 zfs_handle_t *ds_hdl;
143 data.single_object = false;
144 data.bootonce = NULL;
145 if ((ds_hdl = zfs_open(lbh->lzh, name,
146 ZFS_TYPE_FILESYSTEM)) == NULL)
147 return (BE_ERR_ZFSOPEN);
149 ret = snapshot_proplist_update(ds_hdl, &data);
155 * Internal callback function used by zfs_iter_filesystems. For each dataset in
156 * the bootenv root, populate an nvlist_t of its relevant properties.
159 prop_list_builder_cb(zfs_handle_t *zfs_hdl, void *data_p)
161 char buf[512], *mountpoint;
165 const char *dataset, *name;
170 * some system for defining constants for the nvlist keys
173 data = (prop_data_t *)data_p;
176 if (data->single_object)
179 nvlist_alloc(&props, NV_UNIQUE_NAME, KM_SLEEP);
181 dataset = zfs_get_name(zfs_hdl);
182 nvlist_add_string(props, "dataset", dataset);
184 if (data->bootonce != NULL &&
185 strcmp(dataset, data->bootonce) == 0)
186 nvlist_add_boolean_value(props, "bootonce", true);
188 name = strrchr(dataset, '/') + 1;
189 nvlist_add_string(props, "name", name);
191 mounted = zfs_is_mounted(zfs_hdl, &mountpoint);
194 nvlist_add_string(props, "mounted", mountpoint);
196 if (zfs_prop_get(zfs_hdl, ZFS_PROP_MOUNTPOINT, buf, 512,
197 NULL, NULL, 0, 1) == 0)
198 nvlist_add_string(props, "mountpoint", buf);
200 if (zfs_prop_get(zfs_hdl, ZFS_PROP_ORIGIN, buf, 512,
201 NULL, NULL, 0, 1) == 0)
202 nvlist_add_string(props, "origin", buf);
204 if (zfs_prop_get(zfs_hdl, ZFS_PROP_CREATION, buf, 512,
205 NULL, NULL, 0, 1) == 0)
206 nvlist_add_string(props, "creation", buf);
208 nvlist_add_boolean_value(props, "active",
209 (strcmp(be_active_path(lbh), dataset) == 0));
211 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USED, buf, 512,
212 NULL, NULL, 0, 1) == 0)
213 nvlist_add_string(props, "used", buf);
215 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDDS, buf, 512,
216 NULL, NULL, 0, 1) == 0)
217 nvlist_add_string(props, "usedds", buf);
219 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDSNAP, buf, 512,
220 NULL, NULL, 0, 1) == 0)
221 nvlist_add_string(props, "usedsnap", buf);
223 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDREFRESERV, buf, 512,
224 NULL, NULL, 0, 1) == 0)
225 nvlist_add_string(props, "usedrefreserv", buf);
227 if (zfs_prop_get(zfs_hdl, ZFS_PROP_REFERENCED, buf, 512,
228 NULL, NULL, 0, 1) == 0)
229 nvlist_add_string(props, "referenced", buf);
231 nvlist_add_boolean_value(props, "nextboot",
232 (strcmp(be_nextboot_path(lbh), dataset) == 0));
234 if (!data->single_object)
235 nvlist_add_nvlist(data->list, name, props);
242 * Updates the properties of each bootenv in the libbe handle
243 * XXX TODO: ensure that this is always consistent (run after adds, deletes,
247 be_proplist_update(prop_data_t *data)
249 zfs_handle_t *root_hdl;
251 if ((root_hdl = zfs_open(data->lbh->lzh, data->lbh->root,
252 ZFS_TYPE_FILESYSTEM)) == NULL)
253 return (BE_ERR_ZFSOPEN);
255 (void) lzbe_get_boot_device(zpool_get_name(data->lbh->active_phandle),
258 /* XXX TODO: some error checking here */
259 zfs_iter_filesystems(root_hdl, prop_list_builder_cb, data);
267 snapshot_proplist_update(zfs_handle_t *hdl, prop_data_t *data)
270 return (zfs_iter_snapshots_sorted(hdl, prop_list_builder_cb, data,
276 be_prop_list_alloc(nvlist_t **be_list)
279 return (nvlist_alloc(be_list, NV_UNIQUE_NAME, KM_SLEEP));
283 * frees property list and its children
286 be_prop_list_free(nvlist_t *be_list)
291 be_pair = nvlist_next_nvpair(be_list, NULL);
292 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
293 nvlist_free(prop_list);
295 while ((be_pair = nvlist_next_nvpair(be_list, be_pair)) != NULL) {
296 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
297 nvlist_free(prop_list);
306 be_exists(libbe_handle_t *lbh, const char *be)
308 char buf[BE_MAXPATHLEN];
310 be_root_concat(lbh, be, buf);
312 if (!zfs_dataset_exists(lbh->lzh, buf, ZFS_TYPE_DATASET))
313 return (BE_ERR_NOENT);
315 return (BE_ERR_SUCCESS);