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
32 typedef struct prop_data {
37 static int prop_list_builder_cb(zfs_handle_t *, void *);
38 static int prop_list_builder(prop_data_t *);
41 * Returns the name of the active boot environment
44 be_active_name(libbe_handle_t *lbh)
46 return (strrchr(lbh->rootfs, '/') + sizeof(char));
51 * Returns full path of the active boot environment
54 be_active_path(libbe_handle_t *lbh)
61 * Returns the path of the boot environment root dataset
64 be_root_path(libbe_handle_t *lbh)
71 * Returns an nvlist of the bootenv's properties
72 * TODO: the nvlist should be passed as a param and ints should return status
75 be_get_bootenv_props(libbe_handle_t *lbh)
80 prop_list_builder(&data);
87 * Internal callback function used by zfs_iter_filesystems. For each dataset in
88 * the bootenv root, populate an nvlist_t of its relevant properties.
89 * TODO: should any other properties be included?
92 prop_list_builder_cb(zfs_handle_t *zfs_hdl, void *data_p)
96 * some system for defining constants for the nvlist keys
102 boolean_t mounted, active, nextboot;
105 data = (prop_data_t *)data_p;
110 libbe_handle_t *lbh = data->lbh;
113 nvlist_alloc(&props, NV_UNIQUE_NAME, KM_SLEEP);
115 const char *dataset = zfs_get_name(zfs_hdl);
116 nvlist_add_string(props, "dataset", dataset);
118 const char *name = strrchr(dataset, '/') + 1;
119 nvlist_add_string(props, "name", name);
122 mounted = zfs_prop_get_int(zfs_hdl, ZFS_PROP_MOUNTED);
123 nvlist_add_boolean_value(props, "mounted", mounted);
125 // TODO: NOT CORRECT! Must use is_mounted
127 zfs_prop_get(zfs_hdl, ZFS_PROP_MOUNTPOINT, buf, 512,
129 nvlist_add_string(props, "mountpoint", buf);
132 if (zfs_prop_get(zfs_hdl, ZFS_PROP_ORIGIN, buf, 512,
134 nvlist_add_string(props, "origin", buf);
137 if (zfs_prop_get(zfs_hdl, ZFS_PROP_CREATION, buf, 512,
139 nvlist_add_string(props, "creation", buf);
142 nvlist_add_boolean_value(props, "active",
143 (strcmp(be_active_path(lbh), dataset) == 0));
145 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USED, buf, 512,
147 nvlist_add_string(props, "used", buf);
150 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDDS, buf, 512,
152 nvlist_add_string(props, "usedds", buf);
155 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDSNAP, buf, 512,
157 nvlist_add_string(props, "usedsnap", buf);
160 if (zfs_prop_get(zfs_hdl, ZFS_PROP_USEDREFRESERV, buf, 512,
162 nvlist_add_string(props, "usedrefreserv", buf);
165 if (zfs_prop_get(zfs_hdl, ZFS_PROP_REFERENCED, buf, 512,
167 nvlist_add_string(props, "referenced", buf);
170 /* TODO figure out how to read nextboot (set in libzfs_pool.c) */
172 nvlist_add_nvlist(data->list, name, props);
179 * Updates the properties of each bootenv in the libbe handle
180 * TODO: rename to be_proplist_update
181 * 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 (nvlist_alloc(&(data->list), NV_UNIQUE_NAME, KM_SLEEP) != 0) {
190 /* TODO: actually handle error */
196 zfs_open(data->lbh->lzh, data->lbh->root,
197 ZFS_TYPE_FILESYSTEM)) == NULL) {
198 return (BE_ERR_ZFSOPEN);
201 // TODO: some error checking here
202 zfs_iter_filesystems(root_hdl, prop_list_builder_cb, data);
211 * frees property list and its children
214 be_prop_list_free(nvlist_t *be_list)
218 nvpair_t *be_pair = nvlist_next_nvpair(be_list, NULL);
220 if (nvpair_value_nvlist(be_pair, &prop_list) == 0) {
221 nvlist_free(prop_list);
224 while ((be_pair = nvlist_next_nvpair(be_list, be_pair)) != NULL) {
225 if (nvpair_value_nvlist(be_pair, &prop_list) == 0) {
226 nvlist_free(prop_list);
236 be_exists(libbe_handle_t *lbh, char *be)
238 char buf[BE_MAXPATHLEN];
240 be_root_concat(lbh, be, buf);
242 // TODO: check mountpoint prop and see if its /, AND that result with below
244 return (zfs_dataset_exists(lbh->lzh, buf, ZFS_TYPE_DATASET));