1 /* $NetBSD: text_label.c,v 1.1.1.2 2009/12/02 00:26:28 haad Exp $ */
2
3 /*
4 * Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
5 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
6 *
7 * This file is part of LVM2.
8 *
9 * This copyrighted material is made available to anyone wishing to use,
10 * modify, copy, or redistribute it subject to the terms and conditions
11 * of the GNU Lesser General Public License v.2.1.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 */
17
18 #include "lib.h"
19 #include "format-text.h"
20 #include "layout.h"
21 #include "label.h"
22 #include "xlate.h"
23 #include "lvmcache.h"
24
25 #include <sys/stat.h>
26 #include <fcntl.h>
27
_text_can_handle(struct labeller * l __attribute ((unused)),void * buf,uint64_t sector __attribute ((unused)))28 static int _text_can_handle(struct labeller *l __attribute((unused)),
29 void *buf,
30 uint64_t sector __attribute((unused)))
31 {
32 struct label_header *lh = (struct label_header *) buf;
33
34 if (!strncmp((char *)lh->type, LVM2_LABEL, sizeof(lh->type)))
35 return 1;
36
37 return 0;
38 }
39
_text_write(struct label * label,void * buf)40 static int _text_write(struct label *label, void *buf)
41 {
42 struct label_header *lh = (struct label_header *) buf;
43 struct pv_header *pvhdr;
44 struct lvmcache_info *info;
45 struct disk_locn *pvh_dlocn_xl;
46 struct metadata_area *mda;
47 struct mda_context *mdac;
48 struct data_area_list *da;
49 char buffer[64] __attribute((aligned(8)));
50 int da1, mda1, mda2;
51
52 /* FIXME Move to where label is created */
53 strncpy(label->type, LVM2_LABEL, sizeof(label->type));
54
55 strncpy((char *)lh->type, label->type, sizeof(label->type));
56
57 pvhdr = (struct pv_header *) ((void *) buf + xlate32(lh->offset_xl));
58 info = (struct lvmcache_info *) label->info;
59 pvhdr->device_size_xl = xlate64(info->device_size);
60 memcpy(pvhdr->pv_uuid, &info->dev->pvid, sizeof(struct id));
61 if (!id_write_format((const struct id *)pvhdr->pv_uuid, buffer,
62 sizeof(buffer))) {
63 stack;
64 buffer[0] = '\0';
65 }
66
67 pvh_dlocn_xl = &pvhdr->disk_areas_xl[0];
68
69 /* List of data areas (holding PEs) */
70 dm_list_iterate_items(da, &info->das) {
71 pvh_dlocn_xl->offset = xlate64(da->disk_locn.offset);
72 pvh_dlocn_xl->size = xlate64(da->disk_locn.size);
73 pvh_dlocn_xl++;
74 }
75
76 /* NULL-termination */
77 pvh_dlocn_xl->offset = xlate64(UINT64_C(0));
78 pvh_dlocn_xl->size = xlate64(UINT64_C(0));
79 pvh_dlocn_xl++;
80
81 /* List of metadata area header locations */
82 dm_list_iterate_items(mda, &info->mdas) {
83 mdac = (struct mda_context *) mda->metadata_locn;
84
85 if (mdac->area.dev != info->dev)
86 continue;
87
88 pvh_dlocn_xl->offset = xlate64(mdac->area.start);
89 pvh_dlocn_xl->size = xlate64(mdac->area.size);
90 pvh_dlocn_xl++;
91 }
92
93 /* NULL-termination */
94 pvh_dlocn_xl->offset = xlate64(UINT64_C(0));
95 pvh_dlocn_xl->size = xlate64(UINT64_C(0));
96
97 /* Create debug message with da and mda locations */
98 if (xlate64(pvhdr->disk_areas_xl[0].offset) ||
99 xlate64(pvhdr->disk_areas_xl[0].size))
100 da1 = 0;
101 else
102 da1 = -1;
103
104 mda1 = da1 + 2;
105 mda2 = mda1 + 1;
106
107 if (!xlate64(pvhdr->disk_areas_xl[mda1].offset) &&
108 !xlate64(pvhdr->disk_areas_xl[mda1].size))
109 mda1 = mda2 = 0;
110 else if (!xlate64(pvhdr->disk_areas_xl[mda2].offset) &&
111 !xlate64(pvhdr->disk_areas_xl[mda2].size))
112 mda2 = 0;
113
114 log_debug("%s: Preparing PV label header %s size %" PRIu64 " with"
115 "%s%.*" PRIu64 "%s%.*" PRIu64 "%s"
116 "%s%.*" PRIu64 "%s%.*" PRIu64 "%s"
117 "%s%.*" PRIu64 "%s%.*" PRIu64 "%s",
118 dev_name(info->dev), buffer, info->device_size,
119 (da1 > -1) ? " da1 (" : "",
120 (da1 > -1) ? 1 : 0,
121 (da1 > -1) ? xlate64(pvhdr->disk_areas_xl[da1].offset) >> SECTOR_SHIFT : 0,
122 (da1 > -1) ? "s, " : "",
123 (da1 > -1) ? 1 : 0,
124 (da1 > -1) ? xlate64(pvhdr->disk_areas_xl[da1].size) >> SECTOR_SHIFT : 0,
125 (da1 > -1) ? "s)" : "",
126 mda1 ? " mda1 (" : "",
127 mda1 ? 1 : 0,
128 mda1 ? xlate64(pvhdr->disk_areas_xl[mda1].offset) >> SECTOR_SHIFT : 0,
129 mda1 ? "s, " : "",
130 mda1 ? 1 : 0,
131 mda1 ? xlate64(pvhdr->disk_areas_xl[mda1].size) >> SECTOR_SHIFT : 0,
132 mda1 ? "s)" : "",
133 mda2 ? " mda2 (" : "",
134 mda2 ? 1 : 0,
135 mda2 ? xlate64(pvhdr->disk_areas_xl[mda2].offset) >> SECTOR_SHIFT : 0,
136 mda2 ? "s, " : "",
137 mda2 ? 1 : 0,
138 mda2 ? xlate64(pvhdr->disk_areas_xl[mda2].size) >> SECTOR_SHIFT : 0,
139 mda2 ? "s)" : "");
140
141 if (da1 < 0) {
142 log_error("Internal error: %s label header currently requires "
143 "a data area.", dev_name(info->dev));
144 return 0;
145 }
146
147 return 1;
148 }
149
add_da(struct dm_pool * mem,struct dm_list * das,uint64_t start,uint64_t size)150 int add_da(struct dm_pool *mem, struct dm_list *das,
151 uint64_t start, uint64_t size)
152 {
153 struct data_area_list *dal;
154
155 if (!mem) {
156 if (!(dal = dm_malloc(sizeof(*dal)))) {
157 log_error("struct data_area_list allocation failed");
158 return 0;
159 }
160 } else {
161 if (!(dal = dm_pool_alloc(mem, sizeof(*dal)))) {
162 log_error("struct data_area_list allocation failed");
163 return 0;
164 }
165 }
166
167 dal->disk_locn.offset = start;
168 dal->disk_locn.size = size;
169
170 dm_list_add(das, &dal->list);
171
172 return 1;
173 }
174
del_das(struct dm_list * das)175 void del_das(struct dm_list *das)
176 {
177 struct dm_list *dah, *tmp;
178 struct data_area_list *da;
179
180 dm_list_iterate_safe(dah, tmp, das) {
181 da = dm_list_item(dah, struct data_area_list);
182 dm_list_del(&da->list);
183 dm_free(da);
184 }
185 }
186
add_mda(const struct format_type * fmt,struct dm_pool * mem,struct dm_list * mdas,struct device * dev,uint64_t start,uint64_t size)187 int add_mda(const struct format_type *fmt, struct dm_pool *mem, struct dm_list *mdas,
188 struct device *dev, uint64_t start, uint64_t size)
189 {
190 /* FIXME List size restricted by pv_header SECTOR_SIZE */
191 struct metadata_area *mdal;
192 struct mda_lists *mda_lists = (struct mda_lists *) fmt->private;
193 struct mda_context *mdac;
194
195 if (!mem) {
196 if (!(mdal = dm_malloc(sizeof(struct metadata_area)))) {
197 log_error("struct mda_list allocation failed");
198 return 0;
199 }
200
201 if (!(mdac = dm_malloc(sizeof(struct mda_context)))) {
202 log_error("struct mda_context allocation failed");
203 dm_free(mdal);
204 return 0;
205 }
206 } else {
207 if (!(mdal = dm_pool_alloc(mem, sizeof(struct metadata_area)))) {
208 log_error("struct mda_list allocation failed");
209 return 0;
210 }
211
212 if (!(mdac = dm_pool_alloc(mem, sizeof(struct mda_context)))) {
213 log_error("struct mda_context allocation failed");
214 return 0;
215 }
216 }
217
218 mdal->ops = mda_lists->raw_ops;
219 mdal->metadata_locn = mdac;
220
221 mdac->area.dev = dev;
222 mdac->area.start = start;
223 mdac->area.size = size;
224 mdac->free_sectors = UINT64_C(0);
225 memset(&mdac->rlocn, 0, sizeof(mdac->rlocn));
226
227 dm_list_add(mdas, &mdal->list);
228 return 1;
229 }
230
del_mdas(struct dm_list * mdas)231 void del_mdas(struct dm_list *mdas)
232 {
233 struct dm_list *mdah, *tmp;
234 struct metadata_area *mda;
235
236 dm_list_iterate_safe(mdah, tmp, mdas) {
237 mda = dm_list_item(mdah, struct metadata_area);
238 dm_free(mda->metadata_locn);
239 dm_list_del(&mda->list);
240 dm_free(mda);
241 }
242 }
243
_text_initialise_label(struct labeller * l __attribute ((unused)),struct label * label)244 static int _text_initialise_label(struct labeller *l __attribute((unused)),
245 struct label *label)
246 {
247 strncpy(label->type, LVM2_LABEL, sizeof(label->type));
248
249 return 1;
250 }
251
_text_read(struct labeller * l,struct device * dev,void * buf,struct label ** label)252 static int _text_read(struct labeller *l, struct device *dev, void *buf,
253 struct label **label)
254 {
255 struct label_header *lh = (struct label_header *) buf;
256 struct pv_header *pvhdr;
257 struct lvmcache_info *info;
258 struct disk_locn *dlocn_xl;
259 uint64_t offset;
260 struct metadata_area *mda;
261 struct id vgid;
262 struct mda_context *mdac;
263 const char *vgname;
264 uint32_t vgstatus;
265 char *creation_host;
266
267 pvhdr = (struct pv_header *) ((void *) buf + xlate32(lh->offset_xl));
268
269 if (!(info = lvmcache_add(l, (char *)pvhdr->pv_uuid, dev,
270 FMT_TEXT_ORPHAN_VG_NAME,
271 FMT_TEXT_ORPHAN_VG_NAME, 0)))
272 return_0;
273 *label = info->label;
274
275 info->device_size = xlate64(pvhdr->device_size_xl);
276
277 if (info->das.n)
278 del_das(&info->das);
279 dm_list_init(&info->das);
280
281 if (info->mdas.n)
282 del_mdas(&info->mdas);
283 dm_list_init(&info->mdas);
284
285 /* Data areas holding the PEs */
286 dlocn_xl = pvhdr->disk_areas_xl;
287 while ((offset = xlate64(dlocn_xl->offset))) {
288 add_da(NULL, &info->das, offset,
289 xlate64(dlocn_xl->size));
290 dlocn_xl++;
291 }
292
293 /* Metadata area headers */
294 dlocn_xl++;
295 while ((offset = xlate64(dlocn_xl->offset))) {
296 add_mda(info->fmt, NULL, &info->mdas, dev, offset,
297 xlate64(dlocn_xl->size));
298 dlocn_xl++;
299 }
300
301 dm_list_iterate_items(mda, &info->mdas) {
302 mdac = (struct mda_context *) mda->metadata_locn;
303 if ((vgname = vgname_from_mda(info->fmt, &mdac->area,
304 &vgid, &vgstatus, &creation_host,
305 &mdac->free_sectors)) &&
306 !lvmcache_update_vgname_and_id(info, vgname,
307 (char *) &vgid, vgstatus,
308 creation_host))
309 return_0;
310 }
311
312 info->status &= ~CACHE_INVALID;
313
314 return 1;
315 }
316
_text_destroy_label(struct labeller * l __attribute ((unused)),struct label * label)317 static void _text_destroy_label(struct labeller *l __attribute((unused)),
318 struct label *label)
319 {
320 struct lvmcache_info *info = (struct lvmcache_info *) label->info;
321
322 if (info->mdas.n)
323 del_mdas(&info->mdas);
324 if (info->das.n)
325 del_das(&info->das);
326 }
327
_fmt_text_destroy(struct labeller * l)328 static void _fmt_text_destroy(struct labeller *l)
329 {
330 dm_free(l);
331 }
332
333 struct label_ops _text_ops = {
334 .can_handle = _text_can_handle,
335 .write = _text_write,
336 .read = _text_read,
337 .verify = _text_can_handle,
338 .initialise_label = _text_initialise_label,
339 .destroy_label = _text_destroy_label,
340 .destroy = _fmt_text_destroy,
341 };
342
text_labeller_create(const struct format_type * fmt)343 struct labeller *text_labeller_create(const struct format_type *fmt)
344 {
345 struct labeller *l;
346
347 if (!(l = dm_malloc(sizeof(*l)))) {
348 log_error("Couldn't allocate labeller object.");
349 return NULL;
350 }
351
352 l->ops = &_text_ops;
353 l->private = (const void *) fmt;
354
355 return l;
356 }
357