4 * Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
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
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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
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static int snapshot_proplist_update(zfs_handle_t *hdl, prop_data_t *data);
35 * Returns the name of the active boot environment
38 be_active_name(libbe_handle_t *lbh)
41 return (strrchr(lbh->rootfs, '/') + sizeof(char));
46 * Returns full path of the active boot environment
49 be_active_path(libbe_handle_t *lbh)
56 * Returns the name of the next active boot environment
59 be_nextboot_name(libbe_handle_t *lbh)
62 return (strrchr(lbh->bootfs, '/') + sizeof(char));
67 * Returns full path of the active boot environment
70 be_nextboot_path(libbe_handle_t *lbh)
78 * Returns the path of the boot environment root dataset
81 be_root_path(libbe_handle_t *lbh)
89 * Populates dsnvl with one nvlist per bootenv dataset describing the properties
90 * of that dataset that we've declared ourselves to care about.
93 be_get_bootenv_props(libbe_handle_t *lbh, nvlist_t *dsnvl)
99 data.single_object = false;
100 return (be_proplist_update(&data));
104 be_get_dataset_props(libbe_handle_t *lbh, const char *name, nvlist_t *props)
106 zfs_handle_t *snap_hdl;
112 data.single_object = true;
113 if ((snap_hdl = zfs_open(lbh->lzh, name,
114 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT)) == NULL)
115 return (BE_ERR_ZFSOPEN);
117 ret = prop_list_builder_cb(snap_hdl, &data);
123 be_get_dataset_snapshots(libbe_handle_t *lbh, const char *name, nvlist_t *props)
125 zfs_handle_t *ds_hdl;
131 data.single_object = false;
132 if ((ds_hdl = zfs_open(lbh->lzh, name,
133 ZFS_TYPE_FILESYSTEM)) == NULL)
134 return (BE_ERR_ZFSOPEN);
136 ret = snapshot_proplist_update(ds_hdl, &data);
142 * Internal callback function used by zfs_iter_filesystems. For each dataset in
143 * the bootenv root, populate an nvlist_t of its relevant properties.
146 prop_list_builder_cb(zfs_handle_t *zfs_hdl, void *data_p)
148 char buf[512], *mountpoint;
152 const char *dataset, *name;
157 * some system for defining constants for the nvlist keys
160 data = (prop_data_t *)data_p;
163 if (data->single_object)
166 nvlist_alloc(&props, NV_UNIQUE_NAME, KM_SLEEP);
168 dataset = zfs_get_name(zfs_hdl);
169 nvlist_add_string(props, "dataset", dataset);
171 name = strrchr(dataset, '/') + 1;
172 nvlist_add_string(props, "name", name);
174 mounted = zfs_is_mounted(zfs_hdl, &mountpoint);
177 nvlist_add_string(props, "mounted", mountpoint);
179 if (zfs_prop_get(zfs_hdl, ZFS_PROP_MOUNTPOINT, buf, 512,
180 NULL, NULL, 0, 1) == 0)
181 nvlist_add_string(props, "mountpoint", buf);
183 if (zfs_prop_get(zfs_hdl, ZFS_PROP_ORIGIN, buf, 512,
184 NULL, NULL, 0, 1) == 0)
185 nvlist_add_string(props, "origin", buf);
187 if (zfs_prop_get(zfs_hdl, ZFS_PROP_CREATION, buf, 512,
188 NULL, NULL, 0, 1) == 0)
189 nvlist_add_string(props, "creation", buf);
191 nvlist_add_boolean_value(props, "active",
192 (strcmp(be_active_path(lbh), dataset) == 0));
194 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USED, buf, 512,
195 NULL, NULL, 0, 1) == 0)
196 nvlist_add_string(props, "used", buf);
198 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDDS, buf, 512,
199 NULL, NULL, 0, 1) == 0)
200 nvlist_add_string(props, "usedds", buf);
202 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDSNAP, buf, 512,
203 NULL, NULL, 0, 1) == 0)
204 nvlist_add_string(props, "usedsnap", buf);
206 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDREFRESERV, buf, 512,
207 NULL, NULL, 0, 1) == 0)
208 nvlist_add_string(props, "usedrefreserv", buf);
210 if (zfs_prop_get(zfs_hdl, ZFS_PROP_REFERENCED, buf, 512,
211 NULL, NULL, 0, 1) == 0)
212 nvlist_add_string(props, "referenced", buf);
214 nvlist_add_boolean_value(props, "nextboot",
215 (strcmp(be_nextboot_path(lbh), dataset) == 0));
217 if (!data->single_object)
218 nvlist_add_nvlist(data->list, name, props);
225 * Updates the properties of each bootenv in the libbe handle
226 * XXX TODO: ensure that this is always consistent (run after adds, deletes,
230 be_proplist_update(prop_data_t *data)
232 zfs_handle_t *root_hdl;
234 if ((root_hdl = zfs_open(data->lbh->lzh, data->lbh->root,
235 ZFS_TYPE_FILESYSTEM)) == NULL)
236 return (BE_ERR_ZFSOPEN);
238 /* XXX TODO: some error checking here */
239 zfs_iter_filesystems(root_hdl, prop_list_builder_cb, data);
247 snapshot_proplist_update(zfs_handle_t *hdl, prop_data_t *data)
250 return (zfs_iter_snapshots_sorted(hdl, prop_list_builder_cb, data));
255 be_prop_list_alloc(nvlist_t **be_list)
258 return (nvlist_alloc(be_list, NV_UNIQUE_NAME, KM_SLEEP));
262 * frees property list and its children
265 be_prop_list_free(nvlist_t *be_list)
270 be_pair = nvlist_next_nvpair(be_list, NULL);
271 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
272 nvlist_free(prop_list);
274 while ((be_pair = nvlist_next_nvpair(be_list, be_pair)) != NULL) {
275 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
276 nvlist_free(prop_list);
285 be_exists(libbe_handle_t *lbh, char *be)
287 char buf[BE_MAXPATHLEN];
292 be_root_concat(lbh, be, buf);
294 if (!zfs_dataset_exists(lbh->lzh, buf, ZFS_TYPE_DATASET))
297 /* Also check if it's mounted at / */
298 if (be_prop_list_alloc(&dsprops) != 0) {
299 set_error(lbh, BE_ERR_UNKNOWN);
303 if (be_get_dataset_props(lbh, buf, dsprops) != 0) {
304 nvlist_free(dsprops);
308 if (nvlist_lookup_string(dsprops, "mountpoint", &mntpoint) == 0) {
309 valid = (strcmp(mntpoint, "/") == 0);
310 nvlist_free(dsprops);
314 nvlist_free(dsprops);