2 * Copyright (C) 2012 STRATO AG. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #define _XOPEN_SOURCE 500
27 #include <uuid/uuid.h>
30 #include "kerncompat.h"
33 #include "print-tree.h"
34 #include "transaction.h"
40 static void print_usage(void);
41 static void dump_superblock(struct btrfs_super_block *sb, int full);
42 int main(int argc, char **argv);
43 static int load_and_dump_sb(char *, int fd, u64 sb_bytenr, int full, int force);
46 static void print_usage(void)
49 "usage: btrfs-show-super [-i super_mirror|-a|-f|-F] dev [dev..]\n");
50 fprintf(stderr, "\t-f : print full superblock information\n");
51 fprintf(stderr, "\t-a : print information of all superblocks\n");
52 fprintf(stderr, "\t-i <super_mirror> : specify which mirror to print out\n");
53 fprintf(stderr, "\t-F : attempt to dump superblocks with bad magic\n");
54 fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
57 int main(int argc, char **argv)
67 u64 sb_bytenr = btrfs_sb_offset(0);
69 while ((opt = getopt(argc, argv, "fFai:")) != -1) {
72 arg = arg_strtou64(optarg);
73 if (arg >= BTRFS_SUPER_MIRROR_MAX) {
75 "Illegal super_mirror %llu\n",
80 sb_bytenr = btrfs_sb_offset(arg);
99 if (check_argc_min(argc - optind, 1)) {
104 for (i = optind; i < argc; i++) {
106 fd = open(filename, O_RDONLY, 0666);
108 fprintf(stderr, "Could not open %s\n", filename);
114 for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) {
115 sb_bytenr = btrfs_sb_offset(idx);
116 if (load_and_dump_sb(filename, fd,
117 sb_bytenr, full, force)) {
125 load_and_dump_sb(filename, fd, sb_bytenr, full, force);
134 static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full,
137 u8 super_block_data[BTRFS_SUPER_INFO_SIZE];
138 struct btrfs_super_block *sb;
141 sb = (struct btrfs_super_block *)super_block_data;
143 ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
144 if (ret != BTRFS_SUPER_INFO_SIZE) {
147 /* check if the disk if too short for further superblock */
148 if (ret == 0 && e == 0)
152 "ERROR: Failed to read the superblock on %s at %llu\n",
153 filename, (unsigned long long)sb_bytenr);
155 "ERROR: error = '%s', errno = %d\n", strerror(e), e);
158 printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename);
159 printf("---------------------------------------------------------\n");
160 if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) {
162 "ERROR: bad magic on superblock on %s at %llu\n",
163 filename, (unsigned long long)sb_bytenr);
165 dump_superblock(sb, full);
170 static int check_csum_sblock(void *sb, int csum_size)
172 char result[BTRFS_CSUM_SIZE];
175 crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE,
176 crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
177 btrfs_csum_final(crc, result);
179 return !memcmp(sb, &result, csum_size);
182 static void print_sys_chunk_array(struct btrfs_super_block *sb)
184 struct extent_buffer *buf;
185 struct btrfs_disk_key *disk_key;
186 struct btrfs_chunk *chunk;
187 struct btrfs_key key;
193 buf = malloc(sizeof(*buf) + sizeof(*sb));
195 fprintf(stderr, "%s\n", strerror(ENOMEM));
198 write_extent_buffer(buf, sb, 0, sizeof(*sb));
199 ptr = sb->sys_chunk_array;
200 array_end = ptr + btrfs_super_sys_array_size(sb);
202 while (ptr < array_end) {
203 disk_key = (struct btrfs_disk_key *)ptr;
204 btrfs_disk_key_to_cpu(&key, disk_key);
206 printf("\titem %d ", i);
207 btrfs_print_key(disk_key);
209 len = sizeof(*disk_key);
213 if (key.type == BTRFS_CHUNK_ITEM_KEY) {
214 chunk = (struct btrfs_chunk *)(ptr - (u8 *)sb);
215 print_chunk(buf, chunk);
216 num_stripes = btrfs_chunk_num_stripes(buf, chunk);
217 len = btrfs_chunk_item_size(num_stripes);
229 static int empty_backup(struct btrfs_root_backup *backup)
231 if (backup == NULL ||
232 (backup->tree_root == 0 &&
233 backup->tree_root_gen == 0))
238 static void print_root_backup(struct btrfs_root_backup *backup)
240 printf("\t\tbackup_tree_root:\t%llu\tgen: %llu\tlevel: %d\n",
241 btrfs_backup_tree_root(backup),
242 btrfs_backup_tree_root_gen(backup),
243 btrfs_backup_tree_root_level(backup));
244 printf("\t\tbackup_chunk_root:\t%llu\tgen: %llu\tlevel: %d\n",
245 btrfs_backup_chunk_root(backup),
246 btrfs_backup_chunk_root_gen(backup),
247 btrfs_backup_chunk_root_level(backup));
248 printf("\t\tbackup_extent_root:\t%llu\tgen: %llu\tlevel: %d\n",
249 btrfs_backup_extent_root(backup),
250 btrfs_backup_extent_root_gen(backup),
251 btrfs_backup_extent_root_level(backup));
252 printf("\t\tbackup_fs_root:\t\t%llu\tgen: %llu\tlevel: %d\n",
253 btrfs_backup_fs_root(backup),
254 btrfs_backup_fs_root_gen(backup),
255 btrfs_backup_fs_root_level(backup));
256 printf("\t\tbackup_dev_root:\t%llu\tgen: %llu\tlevel: %d\n",
257 btrfs_backup_dev_root(backup),
258 btrfs_backup_dev_root_gen(backup),
259 btrfs_backup_dev_root_level(backup));
260 printf("\t\tbackup_csum_root:\t%llu\tgen: %llu\tlevel: %d\n",
261 btrfs_backup_csum_root(backup),
262 btrfs_backup_csum_root_gen(backup),
263 btrfs_backup_csum_root_level(backup));
265 printf("\t\tbackup_total_bytes:\t%llu\n",
266 btrfs_backup_total_bytes(backup));
267 printf("\t\tbackup_bytes_used:\t%llu\n",
268 btrfs_backup_bytes_used(backup));
269 printf("\t\tbackup_num_devices:\t%llu\n",
270 btrfs_backup_num_devices(backup));
274 static void print_backup_roots(struct btrfs_super_block *sb)
276 struct btrfs_root_backup *backup;
279 for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
280 backup = sb->super_roots + i;
281 if (!empty_backup(backup)) {
282 printf("\tbackup %d:\n", i);
283 print_root_backup(backup);
288 static void dump_superblock(struct btrfs_super_block *sb, int full)
291 char *s, buf[BTRFS_UUID_UNPARSED_SIZE];
294 printf("csum\t\t\t0x");
295 for (i = 0, p = sb->csum; i < btrfs_super_csum_size(sb); i++)
296 printf("%02x", p[i]);
297 if (check_csum_sblock(sb, btrfs_super_csum_size(sb)))
300 printf(" [DON'T MATCH]");
303 printf("bytenr\t\t\t%llu\n",
304 (unsigned long long)btrfs_super_bytenr(sb));
305 printf("flags\t\t\t0x%llx\n",
306 (unsigned long long)btrfs_super_flags(sb));
308 printf("magic\t\t\t");
309 s = (char *) &sb->magic;
310 for (i = 0; i < 8; i++)
311 putchar(isprint(s[i]) ? s[i] : '.');
312 if (btrfs_super_magic(sb) == BTRFS_MAGIC)
313 printf(" [match]\n");
315 printf(" [DON'T MATCH]\n");
317 uuid_unparse(sb->fsid, buf);
318 printf("fsid\t\t\t%s\n", buf);
320 printf("label\t\t\t");
322 for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++)
323 putchar(isprint(s[i]) ? s[i] : '.');
326 printf("generation\t\t%llu\n",
327 (unsigned long long)btrfs_super_generation(sb));
328 printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb));
329 printf("sys_array_size\t\t%llu\n",
330 (unsigned long long)btrfs_super_sys_array_size(sb));
331 printf("chunk_root_generation\t%llu\n",
332 (unsigned long long)btrfs_super_chunk_root_generation(sb));
333 printf("root_level\t\t%llu\n",
334 (unsigned long long)btrfs_super_root_level(sb));
335 printf("chunk_root\t\t%llu\n",
336 (unsigned long long)btrfs_super_chunk_root(sb));
337 printf("chunk_root_level\t%llu\n",
338 (unsigned long long)btrfs_super_chunk_root_level(sb));
339 printf("log_root\t\t%llu\n",
340 (unsigned long long)btrfs_super_log_root(sb));
341 printf("log_root_transid\t%llu\n",
342 (unsigned long long)btrfs_super_log_root_transid(sb));
343 printf("log_root_level\t\t%llu\n",
344 (unsigned long long)btrfs_super_log_root_level(sb));
345 printf("total_bytes\t\t%llu\n",
346 (unsigned long long)btrfs_super_total_bytes(sb));
347 printf("bytes_used\t\t%llu\n",
348 (unsigned long long)btrfs_super_bytes_used(sb));
349 printf("sectorsize\t\t%llu\n",
350 (unsigned long long)btrfs_super_sectorsize(sb));
351 printf("nodesize\t\t%llu\n",
352 (unsigned long long)btrfs_super_nodesize(sb));
353 printf("leafsize\t\t%llu\n",
354 (unsigned long long)btrfs_super_leafsize(sb));
355 printf("stripesize\t\t%llu\n",
356 (unsigned long long)btrfs_super_stripesize(sb));
357 printf("root_dir\t\t%llu\n",
358 (unsigned long long)btrfs_super_root_dir(sb));
359 printf("num_devices\t\t%llu\n",
360 (unsigned long long)btrfs_super_num_devices(sb));
361 printf("compat_flags\t\t0x%llx\n",
362 (unsigned long long)btrfs_super_compat_flags(sb));
363 printf("compat_ro_flags\t\t0x%llx\n",
364 (unsigned long long)btrfs_super_compat_ro_flags(sb));
365 printf("incompat_flags\t\t0x%llx\n",
366 (unsigned long long)btrfs_super_incompat_flags(sb));
367 printf("csum_type\t\t%llu\n",
368 (unsigned long long)btrfs_super_csum_type(sb));
369 printf("csum_size\t\t%llu\n",
370 (unsigned long long)btrfs_super_csum_size(sb));
371 printf("cache_generation\t%llu\n",
372 (unsigned long long)btrfs_super_cache_generation(sb));
373 printf("uuid_tree_generation\t%llu\n",
374 (unsigned long long)btrfs_super_uuid_tree_generation(sb));
376 uuid_unparse(sb->dev_item.uuid, buf);
377 printf("dev_item.uuid\t\t%s\n", buf);
379 uuid_unparse(sb->dev_item.fsid, buf);
380 printf("dev_item.fsid\t\t%s %s\n", buf,
381 !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ?
382 "[match]" : "[DON'T MATCH]");
384 printf("dev_item.type\t\t%llu\n", (unsigned long long)
385 btrfs_stack_device_type(&sb->dev_item));
386 printf("dev_item.total_bytes\t%llu\n", (unsigned long long)
387 btrfs_stack_device_total_bytes(&sb->dev_item));
388 printf("dev_item.bytes_used\t%llu\n", (unsigned long long)
389 btrfs_stack_device_bytes_used(&sb->dev_item));
390 printf("dev_item.io_align\t%u\n", (unsigned int)
391 btrfs_stack_device_io_align(&sb->dev_item));
392 printf("dev_item.io_width\t%u\n", (unsigned int)
393 btrfs_stack_device_io_width(&sb->dev_item));
394 printf("dev_item.sector_size\t%u\n", (unsigned int)
395 btrfs_stack_device_sector_size(&sb->dev_item));
396 printf("dev_item.devid\t\t%llu\n",
397 btrfs_stack_device_id(&sb->dev_item));
398 printf("dev_item.dev_group\t%u\n", (unsigned int)
399 btrfs_stack_device_group(&sb->dev_item));
400 printf("dev_item.seek_speed\t%u\n", (unsigned int)
401 btrfs_stack_device_seek_speed(&sb->dev_item));
402 printf("dev_item.bandwidth\t%u\n", (unsigned int)
403 btrfs_stack_device_bandwidth(&sb->dev_item));
404 printf("dev_item.generation\t%llu\n", (unsigned long long)
405 btrfs_stack_device_generation(&sb->dev_item));
407 printf("sys_chunk_array[%d]:\n", BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
408 print_sys_chunk_array(sb);
409 printf("backup_roots[%d]:\n", BTRFS_NUM_BACKUP_ROOTS);
410 print_backup_roots(sb);