1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2007 Oracle. All rights reserved.
8 #include "print-tree.h"
10 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
12 int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
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));
23 static void print_dev_item(struct extent_buffer *eb,
24 struct btrfs_dev_item *dev_item)
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));
31 static void print_extent_data_ref(struct extent_buffer *eb,
32 struct btrfs_extent_data_ref *ref)
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));
41 static void print_extent_item(struct extent_buffer *eb, int slot, int type)
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;
50 u32 item_size = btrfs_item_size_nr(eb, slot);
55 if (item_size < sizeof(*ei)) {
56 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
57 struct btrfs_extent_item_v0 *ei0;
58 BUG_ON(item_size != sizeof(*ei0));
59 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
60 pr_info("\t\textent refs %u\n",
61 btrfs_extent_refs_v0(eb, ei0));
68 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
69 flags = btrfs_extent_flags(eb, ei);
71 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
72 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
75 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
76 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
77 struct btrfs_tree_block_info *info;
78 info = (struct btrfs_tree_block_info *)(ei + 1);
79 btrfs_tree_block_key(eb, info, &key);
80 pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
81 btrfs_disk_key_objectid(&key), key.type,
82 btrfs_disk_key_offset(&key),
83 btrfs_tree_block_level(eb, info));
84 iref = (struct btrfs_extent_inline_ref *)(info + 1);
86 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
89 ptr = (unsigned long)iref;
90 end = (unsigned long)ei + item_size;
92 iref = (struct btrfs_extent_inline_ref *)ptr;
93 type = btrfs_extent_inline_ref_type(eb, iref);
94 offset = btrfs_extent_inline_ref_offset(eb, iref);
95 pr_info("\t\tref#%d: ", ref_index++);
97 case BTRFS_TREE_BLOCK_REF_KEY:
98 pr_cont("tree block backref root %llu\n", offset);
100 case BTRFS_SHARED_BLOCK_REF_KEY:
101 pr_cont("shared block backref parent %llu\n", offset);
103 * offset is supposed to be a tree block which
104 * must be aligned to nodesize.
106 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
107 pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
108 offset, (unsigned long long)eb->fs_info->nodesize);
110 case BTRFS_EXTENT_DATA_REF_KEY:
111 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
112 print_extent_data_ref(eb, dref);
114 case BTRFS_SHARED_DATA_REF_KEY:
115 sref = (struct btrfs_shared_data_ref *)(iref + 1);
116 pr_cont("shared data backref parent %llu count %u\n",
117 offset, btrfs_shared_data_ref_count(eb, sref));
119 * offset is supposed to be a tree block which
120 * must be aligned to nodesize.
122 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
123 pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
124 offset, (unsigned long long)eb->fs_info->nodesize);
127 pr_cont("(extent %llu has INVALID ref type %d)\n",
131 ptr += btrfs_extent_inline_ref_size(type);
136 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
137 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
139 struct btrfs_extent_ref_v0 *ref0;
141 ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
142 printk("\t\textent back ref root %llu gen %llu owner %llu num_refs %lu\n",
143 btrfs_ref_root_v0(eb, ref0),
144 btrfs_ref_generation_v0(eb, ref0),
145 btrfs_ref_objectid_v0(eb, ref0),
146 (unsigned long)btrfs_ref_count_v0(eb, ref0));
150 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
153 if (!IS_ALIGNED(item_size, sizeof(u64))) {
154 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
155 (unsigned long)item_size);
161 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
162 pr_info("\t\tsubvol_id %llu\n",
163 (unsigned long long)le64_to_cpu(subvol_id));
164 item_size -= sizeof(u64);
165 offset += sizeof(u64);
170 * Helper to output refs and locking status of extent buffer. Useful to debug
171 * race condition related problems.
173 static void print_eb_refs_lock(struct extent_buffer *eb)
175 #ifdef CONFIG_BTRFS_DEBUG
176 btrfs_info(eb->fs_info,
177 "refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
178 atomic_read(&eb->refs), atomic_read(&eb->write_locks),
179 atomic_read(&eb->read_locks),
180 atomic_read(&eb->blocking_writers),
181 atomic_read(&eb->blocking_readers),
182 atomic_read(&eb->spinning_writers),
183 atomic_read(&eb->spinning_readers),
184 eb->lock_owner, current->pid);
188 void btrfs_print_leaf(struct extent_buffer *l)
190 struct btrfs_fs_info *fs_info;
193 struct btrfs_item *item;
194 struct btrfs_root_item *ri;
195 struct btrfs_dir_item *di;
196 struct btrfs_inode_item *ii;
197 struct btrfs_block_group_item *bi;
198 struct btrfs_file_extent_item *fi;
199 struct btrfs_extent_data_ref *dref;
200 struct btrfs_shared_data_ref *sref;
201 struct btrfs_dev_extent *dev_extent;
202 struct btrfs_key key;
203 struct btrfs_key found_key;
208 fs_info = l->fs_info;
209 nr = btrfs_header_nritems(l);
212 "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
213 btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
214 btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
215 print_eb_refs_lock(l);
216 for (i = 0 ; i < nr ; i++) {
217 item = btrfs_item_nr(i);
218 btrfs_item_key_to_cpu(l, &key, i);
220 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
221 i, key.objectid, type, key.offset,
222 btrfs_item_offset(l, item), btrfs_item_size(l, item));
224 case BTRFS_INODE_ITEM_KEY:
225 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
226 pr_info("\t\tinode generation %llu size %llu mode %o\n",
227 btrfs_inode_generation(l, ii),
228 btrfs_inode_size(l, ii),
229 btrfs_inode_mode(l, ii));
231 case BTRFS_DIR_ITEM_KEY:
232 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
233 btrfs_dir_item_key_to_cpu(l, di, &found_key);
234 pr_info("\t\tdir oid %llu type %u\n",
236 btrfs_dir_type(l, di));
238 case BTRFS_ROOT_ITEM_KEY:
239 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
240 pr_info("\t\troot data bytenr %llu refs %u\n",
241 btrfs_disk_root_bytenr(l, ri),
242 btrfs_disk_root_refs(l, ri));
244 case BTRFS_EXTENT_ITEM_KEY:
245 case BTRFS_METADATA_ITEM_KEY:
246 print_extent_item(l, i, type);
248 case BTRFS_TREE_BLOCK_REF_KEY:
249 pr_info("\t\ttree block backref\n");
251 case BTRFS_SHARED_BLOCK_REF_KEY:
252 pr_info("\t\tshared block backref\n");
254 case BTRFS_EXTENT_DATA_REF_KEY:
255 dref = btrfs_item_ptr(l, i,
256 struct btrfs_extent_data_ref);
257 print_extent_data_ref(l, dref);
259 case BTRFS_SHARED_DATA_REF_KEY:
260 sref = btrfs_item_ptr(l, i,
261 struct btrfs_shared_data_ref);
262 pr_info("\t\tshared data backref count %u\n",
263 btrfs_shared_data_ref_count(l, sref));
265 case BTRFS_EXTENT_DATA_KEY:
266 fi = btrfs_item_ptr(l, i,
267 struct btrfs_file_extent_item);
268 if (btrfs_file_extent_type(l, fi) ==
269 BTRFS_FILE_EXTENT_INLINE) {
270 pr_info("\t\tinline extent data size %u\n",
271 btrfs_file_extent_inline_len(l, i, fi));
274 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
275 btrfs_file_extent_disk_bytenr(l, fi),
276 btrfs_file_extent_disk_num_bytes(l, fi));
277 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
278 btrfs_file_extent_offset(l, fi),
279 btrfs_file_extent_num_bytes(l, fi),
280 btrfs_file_extent_ram_bytes(l, fi));
282 case BTRFS_EXTENT_REF_V0_KEY:
283 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
284 print_extent_ref_v0(l, i);
289 case BTRFS_BLOCK_GROUP_ITEM_KEY:
290 bi = btrfs_item_ptr(l, i,
291 struct btrfs_block_group_item);
293 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
294 btrfs_disk_block_group_used(l, bi),
295 btrfs_disk_block_group_chunk_objectid(l, bi),
296 btrfs_disk_block_group_flags(l, bi));
298 case BTRFS_CHUNK_ITEM_KEY:
299 print_chunk(l, btrfs_item_ptr(l, i,
300 struct btrfs_chunk));
302 case BTRFS_DEV_ITEM_KEY:
303 print_dev_item(l, btrfs_item_ptr(l, i,
304 struct btrfs_dev_item));
306 case BTRFS_DEV_EXTENT_KEY:
307 dev_extent = btrfs_item_ptr(l, i,
308 struct btrfs_dev_extent);
309 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
310 btrfs_dev_extent_chunk_tree(l, dev_extent),
311 btrfs_dev_extent_chunk_objectid(l, dev_extent),
312 btrfs_dev_extent_chunk_offset(l, dev_extent),
313 btrfs_dev_extent_length(l, dev_extent));
315 case BTRFS_PERSISTENT_ITEM_KEY:
316 pr_info("\t\tpersistent item objectid %llu offset %llu\n",
317 key.objectid, key.offset);
318 switch (key.objectid) {
319 case BTRFS_DEV_STATS_OBJECTID:
320 pr_info("\t\tdevice stats\n");
323 pr_info("\t\tunknown persistent item\n");
326 case BTRFS_TEMPORARY_ITEM_KEY:
327 pr_info("\t\ttemporary item objectid %llu offset %llu\n",
328 key.objectid, key.offset);
329 switch (key.objectid) {
330 case BTRFS_BALANCE_OBJECTID:
331 pr_info("\t\tbalance status\n");
334 pr_info("\t\tunknown temporary item\n");
337 case BTRFS_DEV_REPLACE_KEY:
338 pr_info("\t\tdev replace\n");
340 case BTRFS_UUID_KEY_SUBVOL:
341 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
342 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
343 btrfs_item_size_nr(l, i));
349 void btrfs_print_tree(struct extent_buffer *c, bool follow)
351 struct btrfs_fs_info *fs_info;
353 struct btrfs_key key;
358 fs_info = c->fs_info;
359 nr = btrfs_header_nritems(c);
360 level = btrfs_header_level(c);
366 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
367 btrfs_header_bytenr(c), level, btrfs_header_generation(c),
368 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
369 btrfs_header_owner(c));
370 print_eb_refs_lock(c);
371 for (i = 0; i < nr; i++) {
372 btrfs_node_key_to_cpu(c, &key, i);
373 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
374 i, key.objectid, key.type, key.offset,
375 btrfs_node_blockptr(c, i),
376 btrfs_node_ptr_generation(c, i));
380 for (i = 0; i < nr; i++) {
381 struct btrfs_key first_key;
382 struct extent_buffer *next;
384 btrfs_node_key_to_cpu(c, &first_key, i);
385 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
386 btrfs_node_ptr_generation(c, i),
387 level - 1, &first_key);
390 } else if (!extent_buffer_uptodate(next)) {
391 free_extent_buffer(next);
395 if (btrfs_is_leaf(next) &&
398 if (btrfs_header_level(next) !=
401 btrfs_print_tree(next, follow);
402 free_extent_buffer(next);