1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2007 Oracle. All rights reserved.
4 */
5
6 #include "ctree.h"
7 #include "disk-io.h"
8 #include "print-tree.h"
9
10 struct root_name_map {
11 u64 id;
12 char name[16];
13 };
14
15 static const struct root_name_map root_map[] = {
16 { BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" },
17 { BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" },
18 { BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" },
19 { BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" },
20 { BTRFS_FS_TREE_OBJECTID, "FS_TREE" },
21 { BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" },
22 { BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" },
23 { BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" },
24 { BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
25 { BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" },
26 { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" },
27 };
28
btrfs_root_name(const struct btrfs_key * key,char * buf)29 const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
30 {
31 int i;
32
33 if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) {
34 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
35 "TREE_RELOC offset=%llu", key->offset);
36 return buf;
37 }
38
39 for (i = 0; i < ARRAY_SIZE(root_map); i++) {
40 if (root_map[i].id == key->objectid)
41 return root_map[i].name;
42 }
43
44 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid);
45 return buf;
46 }
47
print_chunk(struct extent_buffer * eb,struct btrfs_chunk * chunk)48 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
49 {
50 int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
51 int i;
52 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
53 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
54 btrfs_chunk_type(eb, chunk), num_stripes);
55 for (i = 0 ; i < num_stripes ; i++) {
56 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
57 btrfs_stripe_devid_nr(eb, chunk, i),
58 btrfs_stripe_offset_nr(eb, chunk, i));
59 }
60 }
print_dev_item(struct extent_buffer * eb,struct btrfs_dev_item * dev_item)61 static void print_dev_item(struct extent_buffer *eb,
62 struct btrfs_dev_item *dev_item)
63 {
64 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
65 btrfs_device_id(eb, dev_item),
66 btrfs_device_total_bytes(eb, dev_item),
67 btrfs_device_bytes_used(eb, dev_item));
68 }
print_extent_data_ref(struct extent_buffer * eb,struct btrfs_extent_data_ref * ref)69 static void print_extent_data_ref(struct extent_buffer *eb,
70 struct btrfs_extent_data_ref *ref)
71 {
72 pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
73 btrfs_extent_data_ref_root(eb, ref),
74 btrfs_extent_data_ref_objectid(eb, ref),
75 btrfs_extent_data_ref_offset(eb, ref),
76 btrfs_extent_data_ref_count(eb, ref));
77 }
78
print_extent_item(struct extent_buffer * eb,int slot,int type)79 static void print_extent_item(struct extent_buffer *eb, int slot, int type)
80 {
81 struct btrfs_extent_item *ei;
82 struct btrfs_extent_inline_ref *iref;
83 struct btrfs_extent_data_ref *dref;
84 struct btrfs_shared_data_ref *sref;
85 struct btrfs_disk_key key;
86 unsigned long end;
87 unsigned long ptr;
88 u32 item_size = btrfs_item_size_nr(eb, slot);
89 u64 flags;
90 u64 offset;
91 int ref_index = 0;
92
93 if (unlikely(item_size < sizeof(*ei))) {
94 btrfs_print_v0_err(eb->fs_info);
95 btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL);
96 }
97
98 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
99 flags = btrfs_extent_flags(eb, ei);
100
101 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
102 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
103 flags);
104
105 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
106 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
107 struct btrfs_tree_block_info *info;
108 info = (struct btrfs_tree_block_info *)(ei + 1);
109 btrfs_tree_block_key(eb, info, &key);
110 pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
111 btrfs_disk_key_objectid(&key), key.type,
112 btrfs_disk_key_offset(&key),
113 btrfs_tree_block_level(eb, info));
114 iref = (struct btrfs_extent_inline_ref *)(info + 1);
115 } else {
116 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
117 }
118
119 ptr = (unsigned long)iref;
120 end = (unsigned long)ei + item_size;
121 while (ptr < end) {
122 iref = (struct btrfs_extent_inline_ref *)ptr;
123 type = btrfs_extent_inline_ref_type(eb, iref);
124 offset = btrfs_extent_inline_ref_offset(eb, iref);
125 pr_info("\t\tref#%d: ", ref_index++);
126 switch (type) {
127 case BTRFS_TREE_BLOCK_REF_KEY:
128 pr_cont("tree block backref root %llu\n", offset);
129 break;
130 case BTRFS_SHARED_BLOCK_REF_KEY:
131 pr_cont("shared block backref parent %llu\n", offset);
132 /*
133 * offset is supposed to be a tree block which
134 * must be aligned to nodesize.
135 */
136 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
137 pr_info(
138 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
139 offset, eb->fs_info->sectorsize);
140 break;
141 case BTRFS_EXTENT_DATA_REF_KEY:
142 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
143 print_extent_data_ref(eb, dref);
144 break;
145 case BTRFS_SHARED_DATA_REF_KEY:
146 sref = (struct btrfs_shared_data_ref *)(iref + 1);
147 pr_cont("shared data backref parent %llu count %u\n",
148 offset, btrfs_shared_data_ref_count(eb, sref));
149 /*
150 * offset is supposed to be a tree block which
151 * must be aligned to nodesize.
152 */
153 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
154 pr_info(
155 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
156 offset, eb->fs_info->sectorsize);
157 break;
158 default:
159 pr_cont("(extent %llu has INVALID ref type %d)\n",
160 eb->start, type);
161 return;
162 }
163 ptr += btrfs_extent_inline_ref_size(type);
164 }
165 WARN_ON(ptr > end);
166 }
167
print_uuid_item(struct extent_buffer * l,unsigned long offset,u32 item_size)168 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
169 u32 item_size)
170 {
171 if (!IS_ALIGNED(item_size, sizeof(u64))) {
172 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
173 (unsigned long)item_size);
174 return;
175 }
176 while (item_size) {
177 __le64 subvol_id;
178
179 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
180 pr_info("\t\tsubvol_id %llu\n",
181 (unsigned long long)le64_to_cpu(subvol_id));
182 item_size -= sizeof(u64);
183 offset += sizeof(u64);
184 }
185 }
186
187 /*
188 * Helper to output refs and locking status of extent buffer. Useful to debug
189 * race condition related problems.
190 */
print_eb_refs_lock(struct extent_buffer * eb)191 static void print_eb_refs_lock(struct extent_buffer *eb)
192 {
193 #ifdef CONFIG_BTRFS_DEBUG
194 btrfs_info(eb->fs_info,
195 "refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
196 atomic_read(&eb->refs), eb->write_locks,
197 atomic_read(&eb->read_locks),
198 eb->blocking_writers,
199 atomic_read(&eb->blocking_readers),
200 eb->spinning_writers,
201 atomic_read(&eb->spinning_readers),
202 eb->lock_owner, current->pid);
203 #endif
204 }
205
btrfs_print_leaf(struct extent_buffer * l)206 void btrfs_print_leaf(struct extent_buffer *l)
207 {
208 struct btrfs_fs_info *fs_info;
209 int i;
210 u32 type, nr;
211 struct btrfs_item *item;
212 struct btrfs_root_item *ri;
213 struct btrfs_dir_item *di;
214 struct btrfs_inode_item *ii;
215 struct btrfs_block_group_item *bi;
216 struct btrfs_file_extent_item *fi;
217 struct btrfs_extent_data_ref *dref;
218 struct btrfs_shared_data_ref *sref;
219 struct btrfs_dev_extent *dev_extent;
220 struct btrfs_key key;
221 struct btrfs_key found_key;
222
223 if (!l)
224 return;
225
226 fs_info = l->fs_info;
227 nr = btrfs_header_nritems(l);
228
229 btrfs_info(fs_info,
230 "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
231 btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
232 btrfs_leaf_free_space(l), btrfs_header_owner(l));
233 print_eb_refs_lock(l);
234 for (i = 0 ; i < nr ; i++) {
235 item = btrfs_item_nr(i);
236 btrfs_item_key_to_cpu(l, &key, i);
237 type = key.type;
238 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
239 i, key.objectid, type, key.offset,
240 btrfs_item_offset(l, item), btrfs_item_size(l, item));
241 switch (type) {
242 case BTRFS_INODE_ITEM_KEY:
243 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
244 pr_info("\t\tinode generation %llu size %llu mode %o\n",
245 btrfs_inode_generation(l, ii),
246 btrfs_inode_size(l, ii),
247 btrfs_inode_mode(l, ii));
248 break;
249 case BTRFS_DIR_ITEM_KEY:
250 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
251 btrfs_dir_item_key_to_cpu(l, di, &found_key);
252 pr_info("\t\tdir oid %llu type %u\n",
253 found_key.objectid,
254 btrfs_dir_type(l, di));
255 break;
256 case BTRFS_ROOT_ITEM_KEY:
257 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
258 pr_info("\t\troot data bytenr %llu refs %u\n",
259 btrfs_disk_root_bytenr(l, ri),
260 btrfs_disk_root_refs(l, ri));
261 break;
262 case BTRFS_EXTENT_ITEM_KEY:
263 case BTRFS_METADATA_ITEM_KEY:
264 print_extent_item(l, i, type);
265 break;
266 case BTRFS_TREE_BLOCK_REF_KEY:
267 pr_info("\t\ttree block backref\n");
268 break;
269 case BTRFS_SHARED_BLOCK_REF_KEY:
270 pr_info("\t\tshared block backref\n");
271 break;
272 case BTRFS_EXTENT_DATA_REF_KEY:
273 dref = btrfs_item_ptr(l, i,
274 struct btrfs_extent_data_ref);
275 print_extent_data_ref(l, dref);
276 break;
277 case BTRFS_SHARED_DATA_REF_KEY:
278 sref = btrfs_item_ptr(l, i,
279 struct btrfs_shared_data_ref);
280 pr_info("\t\tshared data backref count %u\n",
281 btrfs_shared_data_ref_count(l, sref));
282 break;
283 case BTRFS_EXTENT_DATA_KEY:
284 fi = btrfs_item_ptr(l, i,
285 struct btrfs_file_extent_item);
286 if (btrfs_file_extent_type(l, fi) ==
287 BTRFS_FILE_EXTENT_INLINE) {
288 pr_info("\t\tinline extent data size %llu\n",
289 btrfs_file_extent_ram_bytes(l, fi));
290 break;
291 }
292 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
293 btrfs_file_extent_disk_bytenr(l, fi),
294 btrfs_file_extent_disk_num_bytes(l, fi));
295 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
296 btrfs_file_extent_offset(l, fi),
297 btrfs_file_extent_num_bytes(l, fi),
298 btrfs_file_extent_ram_bytes(l, fi));
299 break;
300 case BTRFS_EXTENT_REF_V0_KEY:
301 btrfs_print_v0_err(fs_info);
302 btrfs_handle_fs_error(fs_info, -EINVAL, NULL);
303 break;
304 case BTRFS_BLOCK_GROUP_ITEM_KEY:
305 bi = btrfs_item_ptr(l, i,
306 struct btrfs_block_group_item);
307 pr_info(
308 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
309 btrfs_block_group_used(l, bi),
310 btrfs_block_group_chunk_objectid(l, bi),
311 btrfs_block_group_flags(l, bi));
312 break;
313 case BTRFS_CHUNK_ITEM_KEY:
314 print_chunk(l, btrfs_item_ptr(l, i,
315 struct btrfs_chunk));
316 break;
317 case BTRFS_DEV_ITEM_KEY:
318 print_dev_item(l, btrfs_item_ptr(l, i,
319 struct btrfs_dev_item));
320 break;
321 case BTRFS_DEV_EXTENT_KEY:
322 dev_extent = btrfs_item_ptr(l, i,
323 struct btrfs_dev_extent);
324 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
325 btrfs_dev_extent_chunk_tree(l, dev_extent),
326 btrfs_dev_extent_chunk_objectid(l, dev_extent),
327 btrfs_dev_extent_chunk_offset(l, dev_extent),
328 btrfs_dev_extent_length(l, dev_extent));
329 break;
330 case BTRFS_PERSISTENT_ITEM_KEY:
331 pr_info("\t\tpersistent item objectid %llu offset %llu\n",
332 key.objectid, key.offset);
333 switch (key.objectid) {
334 case BTRFS_DEV_STATS_OBJECTID:
335 pr_info("\t\tdevice stats\n");
336 break;
337 default:
338 pr_info("\t\tunknown persistent item\n");
339 }
340 break;
341 case BTRFS_TEMPORARY_ITEM_KEY:
342 pr_info("\t\ttemporary item objectid %llu offset %llu\n",
343 key.objectid, key.offset);
344 switch (key.objectid) {
345 case BTRFS_BALANCE_OBJECTID:
346 pr_info("\t\tbalance status\n");
347 break;
348 default:
349 pr_info("\t\tunknown temporary item\n");
350 }
351 break;
352 case BTRFS_DEV_REPLACE_KEY:
353 pr_info("\t\tdev replace\n");
354 break;
355 case BTRFS_UUID_KEY_SUBVOL:
356 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
357 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
358 btrfs_item_size_nr(l, i));
359 break;
360 }
361 }
362 }
363
btrfs_print_tree(struct extent_buffer * c,bool follow)364 void btrfs_print_tree(struct extent_buffer *c, bool follow)
365 {
366 struct btrfs_fs_info *fs_info;
367 int i; u32 nr;
368 struct btrfs_key key;
369 int level;
370
371 if (!c)
372 return;
373 fs_info = c->fs_info;
374 nr = btrfs_header_nritems(c);
375 level = btrfs_header_level(c);
376 if (level == 0) {
377 btrfs_print_leaf(c);
378 return;
379 }
380 btrfs_info(fs_info,
381 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
382 btrfs_header_bytenr(c), level, btrfs_header_generation(c),
383 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
384 btrfs_header_owner(c));
385 print_eb_refs_lock(c);
386 for (i = 0; i < nr; i++) {
387 btrfs_node_key_to_cpu(c, &key, i);
388 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
389 i, key.objectid, key.type, key.offset,
390 btrfs_node_blockptr(c, i),
391 btrfs_node_ptr_generation(c, i));
392 }
393 if (!follow)
394 return;
395 for (i = 0; i < nr; i++) {
396 struct btrfs_key first_key;
397 struct extent_buffer *next;
398
399 btrfs_node_key_to_cpu(c, &first_key, i);
400 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
401 btrfs_node_ptr_generation(c, i),
402 level - 1, &first_key);
403 if (IS_ERR(next)) {
404 continue;
405 } else if (!extent_buffer_uptodate(next)) {
406 free_extent_buffer(next);
407 continue;
408 }
409
410 if (btrfs_is_leaf(next) &&
411 level != 1)
412 BUG();
413 if (btrfs_header_level(next) !=
414 level - 1)
415 BUG();
416 btrfs_print_tree(next, follow);
417 free_extent_buffer(next);
418 }
419 }
420