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19#include "ctree.h"
20#include "disk-io.h"
21#include "print-tree.h"
22
23static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
24{
25 int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
26 int i;
27 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
28 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
29 btrfs_chunk_type(eb, chunk), num_stripes);
30 for (i = 0 ; i < num_stripes ; i++) {
31 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
32 btrfs_stripe_devid_nr(eb, chunk, i),
33 btrfs_stripe_offset_nr(eb, chunk, i));
34 }
35}
36static void print_dev_item(struct extent_buffer *eb,
37 struct btrfs_dev_item *dev_item)
38{
39 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
40 btrfs_device_id(eb, dev_item),
41 btrfs_device_total_bytes(eb, dev_item),
42 btrfs_device_bytes_used(eb, dev_item));
43}
44static void print_extent_data_ref(struct extent_buffer *eb,
45 struct btrfs_extent_data_ref *ref)
46{
47 pr_info("\t\textent data backref root %llu objectid %llu offset %llu count %u\n",
48 btrfs_extent_data_ref_root(eb, ref),
49 btrfs_extent_data_ref_objectid(eb, ref),
50 btrfs_extent_data_ref_offset(eb, ref),
51 btrfs_extent_data_ref_count(eb, ref));
52}
53
54static void print_extent_item(struct extent_buffer *eb, int slot, int type)
55{
56 struct btrfs_extent_item *ei;
57 struct btrfs_extent_inline_ref *iref;
58 struct btrfs_extent_data_ref *dref;
59 struct btrfs_shared_data_ref *sref;
60 struct btrfs_disk_key key;
61 unsigned long end;
62 unsigned long ptr;
63 u32 item_size = btrfs_item_size_nr(eb, slot);
64 u64 flags;
65 u64 offset;
66
67 if (item_size < sizeof(*ei)) {
68#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
69 struct btrfs_extent_item_v0 *ei0;
70 BUG_ON(item_size != sizeof(*ei0));
71 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
72 pr_info("\t\textent refs %u\n",
73 btrfs_extent_refs_v0(eb, ei0));
74 return;
75#else
76 BUG();
77#endif
78 }
79
80 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
81 flags = btrfs_extent_flags(eb, ei);
82
83 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
84 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
85 flags);
86
87 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
88 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
89 struct btrfs_tree_block_info *info;
90 info = (struct btrfs_tree_block_info *)(ei + 1);
91 btrfs_tree_block_key(eb, info, &key);
92 pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
93 btrfs_disk_key_objectid(&key), key.type,
94 btrfs_disk_key_offset(&key),
95 btrfs_tree_block_level(eb, info));
96 iref = (struct btrfs_extent_inline_ref *)(info + 1);
97 } else {
98 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
99 }
100
101 ptr = (unsigned long)iref;
102 end = (unsigned long)ei + item_size;
103 while (ptr < end) {
104 iref = (struct btrfs_extent_inline_ref *)ptr;
105 type = btrfs_extent_inline_ref_type(eb, iref);
106 offset = btrfs_extent_inline_ref_offset(eb, iref);
107 switch (type) {
108 case BTRFS_TREE_BLOCK_REF_KEY:
109 pr_info("\t\ttree block backref root %llu\n", offset);
110 break;
111 case BTRFS_SHARED_BLOCK_REF_KEY:
112 pr_info("\t\tshared block backref parent %llu\n", offset);
113 break;
114 case BTRFS_EXTENT_DATA_REF_KEY:
115 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
116 print_extent_data_ref(eb, dref);
117 break;
118 case BTRFS_SHARED_DATA_REF_KEY:
119 sref = (struct btrfs_shared_data_ref *)(iref + 1);
120 pr_info("\t\tshared data backref parent %llu count %u\n",
121 offset, btrfs_shared_data_ref_count(eb, sref));
122 break;
123 default:
124 BUG();
125 }
126 ptr += btrfs_extent_inline_ref_size(type);
127 }
128 WARN_ON(ptr > end);
129}
130
131#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
132static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
133{
134 struct btrfs_extent_ref_v0 *ref0;
135
136 ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
137 printk("\t\textent back ref root %llu gen %llu owner %llu num_refs %lu\n",
138 btrfs_ref_root_v0(eb, ref0),
139 btrfs_ref_generation_v0(eb, ref0),
140 btrfs_ref_objectid_v0(eb, ref0),
141 (unsigned long)btrfs_ref_count_v0(eb, ref0));
142}
143#endif
144
145static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
146 u32 item_size)
147{
148 if (!IS_ALIGNED(item_size, sizeof(u64))) {
149 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
150 (unsigned long)item_size);
151 return;
152 }
153 while (item_size) {
154 __le64 subvol_id;
155
156 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
157 pr_info("\t\tsubvol_id %llu\n",
158 (unsigned long long)le64_to_cpu(subvol_id));
159 item_size -= sizeof(u64);
160 offset += sizeof(u64);
161 }
162}
163
164void btrfs_print_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *l)
165{
166 int i;
167 u32 type, nr;
168 struct btrfs_item *item;
169 struct btrfs_root_item *ri;
170 struct btrfs_dir_item *di;
171 struct btrfs_inode_item *ii;
172 struct btrfs_block_group_item *bi;
173 struct btrfs_file_extent_item *fi;
174 struct btrfs_extent_data_ref *dref;
175 struct btrfs_shared_data_ref *sref;
176 struct btrfs_dev_extent *dev_extent;
177 struct btrfs_key key;
178 struct btrfs_key found_key;
179
180 if (!l)
181 return;
182
183 nr = btrfs_header_nritems(l);
184
185 btrfs_info(fs_info, "leaf %llu total ptrs %d free space %d",
186 btrfs_header_bytenr(l), nr,
187 btrfs_leaf_free_space(fs_info, l));
188 for (i = 0 ; i < nr ; i++) {
189 item = btrfs_item_nr(i);
190 btrfs_item_key_to_cpu(l, &key, i);
191 type = key.type;
192 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
193 i, key.objectid, type, key.offset,
194 btrfs_item_offset(l, item), btrfs_item_size(l, item));
195 switch (type) {
196 case BTRFS_INODE_ITEM_KEY:
197 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
198 pr_info("\t\tinode generation %llu size %llu mode %o\n",
199 btrfs_inode_generation(l, ii),
200 btrfs_inode_size(l, ii),
201 btrfs_inode_mode(l, ii));
202 break;
203 case BTRFS_DIR_ITEM_KEY:
204 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
205 btrfs_dir_item_key_to_cpu(l, di, &found_key);
206 pr_info("\t\tdir oid %llu type %u\n",
207 found_key.objectid,
208 btrfs_dir_type(l, di));
209 break;
210 case BTRFS_ROOT_ITEM_KEY:
211 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
212 pr_info("\t\troot data bytenr %llu refs %u\n",
213 btrfs_disk_root_bytenr(l, ri),
214 btrfs_disk_root_refs(l, ri));
215 break;
216 case BTRFS_EXTENT_ITEM_KEY:
217 case BTRFS_METADATA_ITEM_KEY:
218 print_extent_item(l, i, type);
219 break;
220 case BTRFS_TREE_BLOCK_REF_KEY:
221 pr_info("\t\ttree block backref\n");
222 break;
223 case BTRFS_SHARED_BLOCK_REF_KEY:
224 pr_info("\t\tshared block backref\n");
225 break;
226 case BTRFS_EXTENT_DATA_REF_KEY:
227 dref = btrfs_item_ptr(l, i,
228 struct btrfs_extent_data_ref);
229 print_extent_data_ref(l, dref);
230 break;
231 case BTRFS_SHARED_DATA_REF_KEY:
232 sref = btrfs_item_ptr(l, i,
233 struct btrfs_shared_data_ref);
234 pr_info("\t\tshared data backref count %u\n",
235 btrfs_shared_data_ref_count(l, sref));
236 break;
237 case BTRFS_EXTENT_DATA_KEY:
238 fi = btrfs_item_ptr(l, i,
239 struct btrfs_file_extent_item);
240 if (btrfs_file_extent_type(l, fi) ==
241 BTRFS_FILE_EXTENT_INLINE) {
242 pr_info("\t\tinline extent data size %u\n",
243 btrfs_file_extent_inline_len(l, i, fi));
244 break;
245 }
246 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
247 btrfs_file_extent_disk_bytenr(l, fi),
248 btrfs_file_extent_disk_num_bytes(l, fi));
249 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
250 btrfs_file_extent_offset(l, fi),
251 btrfs_file_extent_num_bytes(l, fi),
252 btrfs_file_extent_ram_bytes(l, fi));
253 break;
254 case BTRFS_EXTENT_REF_V0_KEY:
255#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
256 print_extent_ref_v0(l, i);
257#else
258 BUG();
259#endif
260 break;
261 case BTRFS_BLOCK_GROUP_ITEM_KEY:
262 bi = btrfs_item_ptr(l, i,
263 struct btrfs_block_group_item);
264 pr_info(
265 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
266 btrfs_disk_block_group_used(l, bi),
267 btrfs_disk_block_group_chunk_objectid(l, bi),
268 btrfs_disk_block_group_flags(l, bi));
269 break;
270 case BTRFS_CHUNK_ITEM_KEY:
271 print_chunk(l, btrfs_item_ptr(l, i,
272 struct btrfs_chunk));
273 break;
274 case BTRFS_DEV_ITEM_KEY:
275 print_dev_item(l, btrfs_item_ptr(l, i,
276 struct btrfs_dev_item));
277 break;
278 case BTRFS_DEV_EXTENT_KEY:
279 dev_extent = btrfs_item_ptr(l, i,
280 struct btrfs_dev_extent);
281 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
282 btrfs_dev_extent_chunk_tree(l, dev_extent),
283 btrfs_dev_extent_chunk_objectid(l, dev_extent),
284 btrfs_dev_extent_chunk_offset(l, dev_extent),
285 btrfs_dev_extent_length(l, dev_extent));
286 break;
287 case BTRFS_PERSISTENT_ITEM_KEY:
288 pr_info("\t\tpersistent item objectid %llu offset %llu\n",
289 key.objectid, key.offset);
290 switch (key.objectid) {
291 case BTRFS_DEV_STATS_OBJECTID:
292 pr_info("\t\tdevice stats\n");
293 break;
294 default:
295 pr_info("\t\tunknown persistent item\n");
296 }
297 break;
298 case BTRFS_TEMPORARY_ITEM_KEY:
299 pr_info("\t\ttemporary item objectid %llu offset %llu\n",
300 key.objectid, key.offset);
301 switch (key.objectid) {
302 case BTRFS_BALANCE_OBJECTID:
303 pr_info("\t\tbalance status\n");
304 break;
305 default:
306 pr_info("\t\tunknown temporary item\n");
307 }
308 break;
309 case BTRFS_DEV_REPLACE_KEY:
310 pr_info("\t\tdev replace\n");
311 break;
312 case BTRFS_UUID_KEY_SUBVOL:
313 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
314 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
315 btrfs_item_size_nr(l, i));
316 break;
317 };
318 }
319}
320
321void btrfs_print_tree(struct btrfs_fs_info *fs_info, struct extent_buffer *c)
322{
323 int i; u32 nr;
324 struct btrfs_key key;
325 int level;
326
327 if (!c)
328 return;
329 nr = btrfs_header_nritems(c);
330 level = btrfs_header_level(c);
331 if (level == 0) {
332 btrfs_print_leaf(fs_info, c);
333 return;
334 }
335 btrfs_info(fs_info,
336 "node %llu level %d total ptrs %d free spc %u",
337 btrfs_header_bytenr(c), level, nr,
338 (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr);
339 for (i = 0; i < nr; i++) {
340 btrfs_node_key_to_cpu(c, &key, i);
341 pr_info("\tkey %d (%llu %u %llu) block %llu\n",
342 i, key.objectid, key.type, key.offset,
343 btrfs_node_blockptr(c, i));
344 }
345 for (i = 0; i < nr; i++) {
346 struct extent_buffer *next = read_tree_block(fs_info,
347 btrfs_node_blockptr(c, i),
348 btrfs_node_ptr_generation(c, i));
349 if (IS_ERR(next)) {
350 continue;
351 } else if (!extent_buffer_uptodate(next)) {
352 free_extent_buffer(next);
353 continue;
354 }
355
356 if (btrfs_is_leaf(next) &&
357 level != 1)
358 BUG();
359 if (btrfs_header_level(next) !=
360 level - 1)
361 BUG();
362 btrfs_print_tree(fs_info, next);
363 free_extent_buffer(next);
364 }
365}
366
