1 /* $NetBSD: lvm_vg.c,v 1.1.1.1 2009/12/02 00:26:15 haad Exp $ */
2
3 /*
4 * Copyright (C) 2008,2009 Red Hat, Inc. All rights reserved.
5 *
6 * This file is part of LVM2.
7 *
8 * This copyrighted material is made available to anyone wishing to use,
9 * modify, copy, or redistribute it subject to the terms and conditions
10 * of the GNU Lesser General Public License v.2.1.
11 *
12 * You should have received a copy of the GNU Lesser General Public License
13 * along with this program; if not, write to the Free Software Foundation,
14 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 */
16
17 #include "lib.h"
18 #include "lvm2app.h"
19 #include "toolcontext.h"
20 #include "metadata-exported.h"
21 #include "archiver.h"
22 #include "locking.h"
23 #include "lvm-string.h"
24 #include "lvmcache.h"
25 #include "metadata.h"
26
27 #include <errno.h>
28 #include <string.h>
29
lvm_vg_create(lvm_t libh,const char * vg_name)30 vg_t lvm_vg_create(lvm_t libh, const char *vg_name)
31 {
32 struct volume_group *vg;
33
34 vg = vg_create((struct cmd_context *)libh, vg_name);
35 /* FIXME: error handling is still TBD */
36 if (vg_read_error(vg)) {
37 vg_release(vg);
38 return NULL;
39 }
40 vg->open_mode = 'w';
41 return (vg_t) vg;
42 }
43
lvm_vg_extend(vg_t vg,const char * device)44 int lvm_vg_extend(vg_t vg, const char *device)
45 {
46 struct pvcreate_params pp;
47
48 if (vg_read_error(vg))
49 return -1;
50
51 if (!vg_check_write_mode(vg))
52 return -1;
53
54 if (!lock_vol(vg->cmd, VG_ORPHANS, LCK_VG_WRITE)) {
55 log_error("Can't get lock for orphan PVs");
56 return -1;
57 }
58
59 pvcreate_params_set_defaults(&pp);
60 if (!vg_extend(vg, 1, (char **) &device, &pp)) {
61 unlock_vg(vg->cmd, VG_ORPHANS);
62 return -1;
63 }
64 /*
65 * FIXME: Either commit to disk, or keep holding VG_ORPHANS and
66 * release in lvm_vg_close().
67 */
68 unlock_vg(vg->cmd, VG_ORPHANS);
69 return 0;
70 }
71
lvm_vg_reduce(vg_t vg,const char * device)72 int lvm_vg_reduce(vg_t vg, const char *device)
73 {
74 if (vg_read_error(vg))
75 return -1;
76 if (!vg_check_write_mode(vg))
77 return -1;
78
79 if (!vg_reduce(vg, (char *)device))
80 return -1;
81 return 0;
82 }
83
lvm_vg_set_extent_size(vg_t vg,uint32_t new_size)84 int lvm_vg_set_extent_size(vg_t vg, uint32_t new_size)
85 {
86 if (vg_read_error(vg))
87 return -1;
88 if (!vg_check_write_mode(vg))
89 return -1;
90
91 if (!vg_set_extent_size(vg, new_size))
92 return -1;
93 return 0;
94 }
95
lvm_vg_write(vg_t vg)96 int lvm_vg_write(vg_t vg)
97 {
98 struct pv_list *pvl;
99
100 if (vg_read_error(vg))
101 return -1;
102 if (!vg_check_write_mode(vg))
103 return -1;
104
105 if (dm_list_empty(&vg->pvs)) {
106 if (!vg_remove(vg))
107 return -1;
108 return 0;
109 }
110
111 if (! dm_list_empty(&vg->removed_pvs)) {
112 if (!lock_vol(vg->cmd, VG_ORPHANS, LCK_VG_WRITE)) {
113 log_error("Can't get lock for orphan PVs");
114 return 0;
115 }
116 }
117
118 if (!archive(vg))
119 return -1;
120
121 /* Store VG on disk(s) */
122 if (!vg_write(vg) || !vg_commit(vg))
123 return -1;
124
125 if (! dm_list_empty(&vg->removed_pvs)) {
126 dm_list_iterate_items(pvl, &vg->removed_pvs) {
127 pv_write_orphan(vg->cmd, pvl->pv);
128 /* FIXME: do pvremove / label_remove()? */
129 }
130 dm_list_init(&vg->removed_pvs);
131 unlock_vg(vg->cmd, VG_ORPHANS);
132 }
133
134 return 0;
135 }
136
lvm_vg_close(vg_t vg)137 int lvm_vg_close(vg_t vg)
138 {
139 if (vg_read_error(vg) == FAILED_LOCKING)
140 vg_release(vg);
141 else
142 unlock_and_release_vg(vg->cmd, vg, vg->name);
143 return 0;
144 }
145
lvm_vg_remove(vg_t vg)146 int lvm_vg_remove(vg_t vg)
147 {
148 if (vg_read_error(vg))
149 return -1;
150 if (!vg_check_write_mode(vg))
151 return -1;
152
153 if (!vg_remove_check(vg))
154 return -1;
155
156 return 0;
157 }
158
lvm_vg_open(lvm_t libh,const char * vgname,const char * mode,uint32_t flags)159 vg_t lvm_vg_open(lvm_t libh, const char *vgname, const char *mode,
160 uint32_t flags)
161 {
162 uint32_t internal_flags = 0;
163 struct volume_group *vg;
164
165 if (!strncmp(mode, "w", 1))
166 internal_flags |= READ_FOR_UPDATE;
167 else if (strncmp(mode, "r", 1)) {
168 log_errno(EINVAL, "Invalid VG open mode");
169 return NULL;
170 }
171
172 vg = vg_read((struct cmd_context *)libh, vgname, NULL, internal_flags);
173 if (vg_read_error(vg)) {
174 /* FIXME: use log_errno either here in inside vg_read */
175 vg_release(vg);
176 return NULL;
177 }
178 /* FIXME: combine this with locking ? */
179 vg->open_mode = mode[0];
180
181 return (vg_t) vg;
182 }
183
lvm_vg_list_pvs(vg_t vg)184 struct dm_list *lvm_vg_list_pvs(vg_t vg)
185 {
186 struct dm_list *list;
187 pv_list_t *pvs;
188 struct pv_list *pvl;
189
190 if (dm_list_empty(&vg->pvs))
191 return NULL;
192
193 if (!(list = dm_pool_zalloc(vg->vgmem, sizeof(*list)))) {
194 log_errno(ENOMEM, "Memory allocation fail for dm_list.");
195 return NULL;
196 }
197 dm_list_init(list);
198
199 dm_list_iterate_items(pvl, &vg->pvs) {
200 if (!(pvs = dm_pool_zalloc(vg->vgmem, sizeof(*pvs)))) {
201 log_errno(ENOMEM,
202 "Memory allocation fail for lvm_pv_list.");
203 return NULL;
204 }
205 pvs->pv = pvl->pv;
206 dm_list_add(list, &pvs->list);
207 }
208 return list;
209 }
210
lvm_vg_list_lvs(vg_t vg)211 struct dm_list *lvm_vg_list_lvs(vg_t vg)
212 {
213 struct dm_list *list;
214 lv_list_t *lvs;
215 struct lv_list *lvl;
216
217 if (dm_list_empty(&vg->lvs))
218 return NULL;
219
220 if (!(list = dm_pool_zalloc(vg->vgmem, sizeof(*list)))) {
221 log_errno(ENOMEM, "Memory allocation fail for dm_list.");
222 return NULL;
223 }
224 dm_list_init(list);
225
226 dm_list_iterate_items(lvl, &vg->lvs) {
227 if (!(lvs = dm_pool_zalloc(vg->vgmem, sizeof(*lvs)))) {
228 log_errno(ENOMEM,
229 "Memory allocation fail for lvm_lv_list.");
230 return NULL;
231 }
232 lvs->lv = lvl->lv;
233 dm_list_add(list, &lvs->list);
234 }
235 return list;
236 }
237
lvm_vg_get_seqno(const vg_t vg)238 uint64_t lvm_vg_get_seqno(const vg_t vg)
239 {
240 return vg_seqno(vg);
241 }
242
lvm_vg_is_clustered(const vg_t vg)243 uint64_t lvm_vg_is_clustered(const vg_t vg)
244 {
245 return vg_is_clustered(vg);
246 }
247
lvm_vg_is_exported(const vg_t vg)248 uint64_t lvm_vg_is_exported(const vg_t vg)
249 {
250 return vg_is_exported(vg);
251 }
252
lvm_vg_is_partial(const vg_t vg)253 uint64_t lvm_vg_is_partial(const vg_t vg)
254 {
255 return (vg_missing_pv_count(vg) != 0);
256 }
257
258 /* FIXME: invalid handle? return INTMAX? */
lvm_vg_get_size(const vg_t vg)259 uint64_t lvm_vg_get_size(const vg_t vg)
260 {
261 return vg_size(vg);
262 }
263
lvm_vg_get_free_size(const vg_t vg)264 uint64_t lvm_vg_get_free_size(const vg_t vg)
265 {
266 return vg_free(vg);
267 }
268
lvm_vg_get_extent_size(const vg_t vg)269 uint64_t lvm_vg_get_extent_size(const vg_t vg)
270 {
271 return vg_extent_size(vg);
272 }
273
lvm_vg_get_extent_count(const vg_t vg)274 uint64_t lvm_vg_get_extent_count(const vg_t vg)
275 {
276 return vg_extent_count(vg);
277 }
278
lvm_vg_get_free_extent_count(const vg_t vg)279 uint64_t lvm_vg_get_free_extent_count(const vg_t vg)
280 {
281 return vg_free_count(vg);
282 }
283
lvm_vg_get_pv_count(const vg_t vg)284 uint64_t lvm_vg_get_pv_count(const vg_t vg)
285 {
286 return vg_pv_count(vg);
287 }
288
lvm_vg_get_max_pv(const vg_t vg)289 uint64_t lvm_vg_get_max_pv(const vg_t vg)
290 {
291 return vg_max_pv(vg);
292 }
293
lvm_vg_get_max_lv(const vg_t vg)294 uint64_t lvm_vg_get_max_lv(const vg_t vg)
295 {
296 return vg_max_lv(vg);
297 }
298
lvm_vg_get_uuid(const vg_t vg)299 char *lvm_vg_get_uuid(const vg_t vg)
300 {
301 char uuid[64] __attribute((aligned(8)));
302
303 if (!id_write_format(&vg->id, uuid, sizeof(uuid))) {
304 log_error("Internal error converting uuid");
305 return NULL;
306 }
307 return strndup((const char *)uuid, 64);
308 }
309
lvm_vg_get_name(const vg_t vg)310 char *lvm_vg_get_name(const vg_t vg)
311 {
312 char *name;
313
314 name = dm_malloc(NAME_LEN + 1);
315 strncpy(name, (const char *)vg->name, NAME_LEN);
316 name[NAME_LEN] = '\0';
317 return name;
318 }
319
320 /*
321 * FIXME: These functions currently return hidden VGs. We should either filter
322 * these out and not return them in the list, or export something like
323 * is_orphan_vg and tell the caller to filter.
324 */
lvm_list_vg_names(lvm_t libh)325 struct dm_list *lvm_list_vg_names(lvm_t libh)
326 {
327 return get_vgnames((struct cmd_context *)libh, 0);
328 }
329
lvm_list_vg_uuids(lvm_t libh)330 struct dm_list *lvm_list_vg_uuids(lvm_t libh)
331 {
332 return get_vgids((struct cmd_context *)libh, 0);
333 }
334
335 /*
336 * FIXME: Elaborate on when to use, side-effects, .cache file, etc
337 */
lvm_scan(lvm_t libh)338 int lvm_scan(lvm_t libh)
339 {
340 if (!lvmcache_label_scan((struct cmd_context *)libh, 2))
341 return -1;
342 return 0;
343 }
344