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
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
33 * Returns the name of the active boot environment
36 be_active_name(libbe_handle_t *lbh)
39 return (strrchr(lbh->rootfs, '/') + sizeof(char));
44 * Returns full path of the active boot environment
47 be_active_path(libbe_handle_t *lbh)
54 * Returns the name of the next active boot environment
57 be_nextboot_name(libbe_handle_t *lbh)
60 return (strrchr(lbh->bootfs, '/') + sizeof(char));
65 * Returns full path of the active boot environment
68 be_nextboot_path(libbe_handle_t *lbh)
76 * Returns the path of the boot environment root dataset
79 be_root_path(libbe_handle_t *lbh)
87 * Populates dsnvl with one nvlist per bootenv dataset describing the properties
88 * of that dataset that we've declared ourselves to care about.
91 be_get_bootenv_props(libbe_handle_t *lbh, nvlist_t *dsnvl)
97 return (prop_list_builder(&data));
102 * Internal callback function used by zfs_iter_filesystems. For each dataset in
103 * the bootenv root, populate an nvlist_t of its relevant properties.
104 * TODO: should any other properties be included?
107 prop_list_builder_cb(zfs_handle_t *zfs_hdl, void *data_p)
109 char buf[512], *mountpoint;
113 const char *dataset, *name;
118 * some system for defining constants for the nvlist keys
121 data = (prop_data_t *)data_p;
124 nvlist_alloc(&props, NV_UNIQUE_NAME, KM_SLEEP);
126 dataset = zfs_get_name(zfs_hdl);
127 nvlist_add_string(props, "dataset", dataset);
129 name = strrchr(dataset, '/') + 1;
130 nvlist_add_string(props, "name", name);
132 mounted = zfs_is_mounted(zfs_hdl, &mountpoint);
133 nvlist_add_boolean_value(props, "mounted", mounted);
136 nvlist_add_string(props, "mountpoint", mountpoint);
138 if (zfs_prop_get(zfs_hdl, ZFS_PROP_ORIGIN, buf, 512,
139 NULL, NULL, 0, 1) == 0)
140 nvlist_add_string(props, "origin", buf);
142 if (zfs_prop_get(zfs_hdl, ZFS_PROP_CREATION, buf, 512,
143 NULL, NULL, 0, 1) == 0)
144 nvlist_add_string(props, "creation", buf);
146 nvlist_add_boolean_value(props, "active",
147 (strcmp(be_active_path(lbh), dataset) == 0));
149 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USED, buf, 512,
150 NULL, NULL, 0, 1) == 0)
151 nvlist_add_string(props, "used", buf);
153 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDDS, buf, 512,
154 NULL, NULL, 0, 1) == 0)
155 nvlist_add_string(props, "usedds", buf);
157 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDSNAP, buf, 512,
158 NULL, NULL, 0, 1) == 0)
159 nvlist_add_string(props, "usedsnap", buf);
161 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDREFRESERV, buf, 512,
162 NULL, NULL, 0, 1) == 0)
163 nvlist_add_string(props, "usedrefreserv", buf);
165 if (zfs_prop_get(zfs_hdl, ZFS_PROP_REFERENCED, buf, 512,
166 NULL, NULL, 0, 1) == 0)
167 nvlist_add_string(props, "referenced", buf);
169 nvlist_add_boolean_value(props, "nextboot",
170 (strcmp(be_nextboot_path(lbh), dataset) == 0));
172 nvlist_add_nvlist(data->list, name, props);
179 * Updates the properties of each bootenv in the libbe handle
180 * XXX TODO: rename to be_proplist_update
181 * XXX TODO: ensure that this is always consistent (run after adds, deletes,
185 prop_list_builder(prop_data_t *data)
187 zfs_handle_t *root_hdl;
189 if ((root_hdl = zfs_open(data->lbh->lzh, data->lbh->root,
190 ZFS_TYPE_FILESYSTEM)) == NULL)
191 return (BE_ERR_ZFSOPEN);
193 /* XXX TODO: some error checking here */
194 zfs_iter_filesystems(root_hdl, prop_list_builder_cb, data);
203 be_prop_list_alloc(nvlist_t **be_list)
206 return (nvlist_alloc(be_list, NV_UNIQUE_NAME, KM_SLEEP));
210 * frees property list and its children
213 be_prop_list_free(nvlist_t *be_list)
218 be_pair = nvlist_next_nvpair(be_list, NULL);
219 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
220 nvlist_free(prop_list);
222 while ((be_pair = nvlist_next_nvpair(be_list, be_pair)) != NULL) {
223 if (nvpair_value_nvlist(be_pair, &prop_list) == 0)
224 nvlist_free(prop_list);
233 be_exists(libbe_handle_t *lbh, char *be)
235 char buf[BE_MAXPATHLEN];
237 be_root_concat(lbh, be, buf);
240 * XXX TODO: check mountpoint prop and see if its /, AND that result
241 * with below expression.
243 return (zfs_dataset_exists(lbh->lzh, buf, ZFS_TYPE_DATASET));