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