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))
58 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
59 flags = btrfs_extent_flags(eb, ei);
61 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
62 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
65 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
66 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
67 struct btrfs_tree_block_info *info;
68 info = (struct btrfs_tree_block_info *)(ei + 1);
69 btrfs_tree_block_key(eb, info, &key);
70 pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
71 btrfs_disk_key_objectid(&key), key.type,
72 btrfs_disk_key_offset(&key),
73 btrfs_tree_block_level(eb, info));
74 iref = (struct btrfs_extent_inline_ref *)(info + 1);
76 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
79 ptr = (unsigned long)iref;
80 end = (unsigned long)ei + item_size;
82 iref = (struct btrfs_extent_inline_ref *)ptr;
83 type = btrfs_extent_inline_ref_type(eb, iref);
84 offset = btrfs_extent_inline_ref_offset(eb, iref);
85 pr_info("\t\tref#%d: ", ref_index++);
87 case BTRFS_TREE_BLOCK_REF_KEY:
88 pr_cont("tree block backref root %llu\n", offset);
90 case BTRFS_SHARED_BLOCK_REF_KEY:
91 pr_cont("shared block backref parent %llu\n", offset);
93 * offset is supposed to be a tree block which
94 * must be aligned to nodesize.
96 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
97 pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
98 offset, (unsigned long long)eb->fs_info->nodesize);
100 case BTRFS_EXTENT_DATA_REF_KEY:
101 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
102 print_extent_data_ref(eb, dref);
104 case BTRFS_SHARED_DATA_REF_KEY:
105 sref = (struct btrfs_shared_data_ref *)(iref + 1);
106 pr_cont("shared data backref parent %llu count %u\n",
107 offset, btrfs_shared_data_ref_count(eb, sref));
109 * offset is supposed to be a tree block which
110 * must be aligned to nodesize.
112 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
113 pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
114 offset, (unsigned long long)eb->fs_info->nodesize);
117 pr_cont("(extent %llu has INVALID ref type %d)\n",
121 ptr += btrfs_extent_inline_ref_size(type);
126 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
129 if (!IS_ALIGNED(item_size, sizeof(u64))) {
130 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
131 (unsigned long)item_size);
137 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
138 pr_info("\t\tsubvol_id %llu\n",
139 (unsigned long long)le64_to_cpu(subvol_id));
140 item_size -= sizeof(u64);
141 offset += sizeof(u64);
146 * Helper to output refs and locking status of extent buffer. Useful to debug
147 * race condition related problems.
149 static void print_eb_refs_lock(struct extent_buffer *eb)
151 #ifdef CONFIG_BTRFS_DEBUG
152 btrfs_info(eb->fs_info,
153 "refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
154 atomic_read(&eb->refs), atomic_read(&eb->write_locks),
155 atomic_read(&eb->read_locks),
156 atomic_read(&eb->blocking_writers),
157 atomic_read(&eb->blocking_readers),
158 atomic_read(&eb->spinning_writers),
159 atomic_read(&eb->spinning_readers),
160 eb->lock_owner, current->pid);
164 void btrfs_print_leaf(struct extent_buffer *l)
166 struct btrfs_fs_info *fs_info;
169 struct btrfs_item *item;
170 struct btrfs_root_item *ri;
171 struct btrfs_dir_item *di;
172 struct btrfs_inode_item *ii;
173 struct btrfs_block_group_item *bi;
174 struct btrfs_file_extent_item *fi;
175 struct btrfs_extent_data_ref *dref;
176 struct btrfs_shared_data_ref *sref;
177 struct btrfs_dev_extent *dev_extent;
178 struct btrfs_key key;
179 struct btrfs_key found_key;
184 fs_info = l->fs_info;
185 nr = btrfs_header_nritems(l);
188 "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
189 btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
190 btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
191 print_eb_refs_lock(l);
192 for (i = 0 ; i < nr ; i++) {
193 item = btrfs_item_nr(i);
194 btrfs_item_key_to_cpu(l, &key, i);
196 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
197 i, key.objectid, type, key.offset,
198 btrfs_item_offset(l, item), btrfs_item_size(l, item));
200 case BTRFS_INODE_ITEM_KEY:
201 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
202 pr_info("\t\tinode generation %llu size %llu mode %o\n",
203 btrfs_inode_generation(l, ii),
204 btrfs_inode_size(l, ii),
205 btrfs_inode_mode(l, ii));
207 case BTRFS_DIR_ITEM_KEY:
208 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
209 btrfs_dir_item_key_to_cpu(l, di, &found_key);
210 pr_info("\t\tdir oid %llu type %u\n",
212 btrfs_dir_type(l, di));
214 case BTRFS_ROOT_ITEM_KEY:
215 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
216 pr_info("\t\troot data bytenr %llu refs %u\n",
217 btrfs_disk_root_bytenr(l, ri),
218 btrfs_disk_root_refs(l, ri));
220 case BTRFS_EXTENT_ITEM_KEY:
221 case BTRFS_METADATA_ITEM_KEY:
222 print_extent_item(l, i, type);
224 case BTRFS_TREE_BLOCK_REF_KEY:
225 pr_info("\t\ttree block backref\n");
227 case BTRFS_SHARED_BLOCK_REF_KEY:
228 pr_info("\t\tshared block backref\n");
230 case BTRFS_EXTENT_DATA_REF_KEY:
231 dref = btrfs_item_ptr(l, i,
232 struct btrfs_extent_data_ref);
233 print_extent_data_ref(l, dref);
235 case BTRFS_SHARED_DATA_REF_KEY:
236 sref = btrfs_item_ptr(l, i,
237 struct btrfs_shared_data_ref);
238 pr_info("\t\tshared data backref count %u\n",
239 btrfs_shared_data_ref_count(l, sref));
241 case BTRFS_EXTENT_DATA_KEY:
242 fi = btrfs_item_ptr(l, i,
243 struct btrfs_file_extent_item);
244 if (btrfs_file_extent_type(l, fi) ==
245 BTRFS_FILE_EXTENT_INLINE) {
246 pr_info("\t\tinline extent data size %llu\n",
247 btrfs_file_extent_ram_bytes(l, fi));
250 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
251 btrfs_file_extent_disk_bytenr(l, fi),
252 btrfs_file_extent_disk_num_bytes(l, fi));
253 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
254 btrfs_file_extent_offset(l, fi),
255 btrfs_file_extent_num_bytes(l, fi),
256 btrfs_file_extent_ram_bytes(l, fi));
258 case BTRFS_EXTENT_REF_V0_KEY:
261 case BTRFS_BLOCK_GROUP_ITEM_KEY:
262 bi = btrfs_item_ptr(l, i,
263 struct btrfs_block_group_item);
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));
270 case BTRFS_CHUNK_ITEM_KEY:
271 print_chunk(l, btrfs_item_ptr(l, i,
272 struct btrfs_chunk));
274 case BTRFS_DEV_ITEM_KEY:
275 print_dev_item(l, btrfs_item_ptr(l, i,
276 struct btrfs_dev_item));
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));
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");
295 pr_info("\t\tunknown persistent item\n");
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");
306 pr_info("\t\tunknown temporary item\n");
309 case BTRFS_DEV_REPLACE_KEY:
310 pr_info("\t\tdev replace\n");
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));
321 void btrfs_print_tree(struct extent_buffer *c, bool follow)
323 struct btrfs_fs_info *fs_info;
325 struct btrfs_key key;
330 fs_info = c->fs_info;
331 nr = btrfs_header_nritems(c);
332 level = btrfs_header_level(c);
338 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
339 btrfs_header_bytenr(c), level, btrfs_header_generation(c),
340 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
341 btrfs_header_owner(c));
342 print_eb_refs_lock(c);
343 for (i = 0; i < nr; i++) {
344 btrfs_node_key_to_cpu(c, &key, i);
345 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
346 i, key.objectid, key.type, key.offset,
347 btrfs_node_blockptr(c, i),
348 btrfs_node_ptr_generation(c, i));
352 for (i = 0; i < nr; i++) {
353 struct btrfs_key first_key;
354 struct extent_buffer *next;
356 btrfs_node_key_to_cpu(c, &first_key, i);
357 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
358 btrfs_node_ptr_generation(c, i),
359 level - 1, &first_key);
362 } else if (!extent_buffer_uptodate(next)) {
363 free_extent_buffer(next);
367 if (btrfs_is_leaf(next) &&
370 if (btrfs_header_level(next) !=
373 btrfs_print_tree(next, follow);
374 free_extent_buffer(next);