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 (unlikely(item_size < sizeof(*ei))) {
56 btrfs_print_v0_err(eb->fs_info);
57 btrfs_handle_fs_error(eb->fs_info, -EINVAL, NULL);
60 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
61 flags = btrfs_extent_flags(eb, ei);
63 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
64 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
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);
78 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
81 ptr = (unsigned long)iref;
82 end = (unsigned long)ei + item_size;
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++);
89 case BTRFS_TREE_BLOCK_REF_KEY:
90 pr_cont("tree block backref root %llu\n", offset);
92 case BTRFS_SHARED_BLOCK_REF_KEY:
93 pr_cont("shared block backref parent %llu\n", offset);
95 * offset is supposed to be a tree block which
96 * must be aligned to nodesize.
98 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
100 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
101 offset, eb->fs_info->sectorsize);
103 case BTRFS_EXTENT_DATA_REF_KEY:
104 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
105 print_extent_data_ref(eb, dref);
107 case BTRFS_SHARED_DATA_REF_KEY:
108 sref = (struct btrfs_shared_data_ref *)(iref + 1);
109 pr_cont("shared data backref parent %llu count %u\n",
110 offset, btrfs_shared_data_ref_count(eb, sref));
112 * offset is supposed to be a tree block which
113 * must be aligned to nodesize.
115 if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
117 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
118 offset, eb->fs_info->sectorsize);
121 pr_cont("(extent %llu has INVALID ref type %d)\n",
125 ptr += btrfs_extent_inline_ref_size(type);
130 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
133 if (!IS_ALIGNED(item_size, sizeof(u64))) {
134 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
135 (unsigned long)item_size);
141 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
142 pr_info("\t\tsubvol_id %llu\n",
143 (unsigned long long)le64_to_cpu(subvol_id));
144 item_size -= sizeof(u64);
145 offset += sizeof(u64);
150 * Helper to output refs and locking status of extent buffer. Useful to debug
151 * race condition related problems.
153 static void print_eb_refs_lock(struct extent_buffer *eb)
155 #ifdef CONFIG_BTRFS_DEBUG
156 btrfs_info(eb->fs_info,
157 "refs %u lock (w:%d r:%d bw:%d br:%d sw:%d sr:%d) lock_owner %u current %u",
158 atomic_read(&eb->refs), atomic_read(&eb->write_locks),
159 atomic_read(&eb->read_locks),
160 atomic_read(&eb->blocking_writers),
161 atomic_read(&eb->blocking_readers),
162 atomic_read(&eb->spinning_writers),
163 atomic_read(&eb->spinning_readers),
164 eb->lock_owner, current->pid);
168 void btrfs_print_leaf(struct extent_buffer *l)
170 struct btrfs_fs_info *fs_info;
173 struct btrfs_item *item;
174 struct btrfs_root_item *ri;
175 struct btrfs_dir_item *di;
176 struct btrfs_inode_item *ii;
177 struct btrfs_block_group_item *bi;
178 struct btrfs_file_extent_item *fi;
179 struct btrfs_extent_data_ref *dref;
180 struct btrfs_shared_data_ref *sref;
181 struct btrfs_dev_extent *dev_extent;
182 struct btrfs_key key;
183 struct btrfs_key found_key;
188 fs_info = l->fs_info;
189 nr = btrfs_header_nritems(l);
192 "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
193 btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
194 btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
195 print_eb_refs_lock(l);
196 for (i = 0 ; i < nr ; i++) {
197 item = btrfs_item_nr(i);
198 btrfs_item_key_to_cpu(l, &key, i);
200 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
201 i, key.objectid, type, key.offset,
202 btrfs_item_offset(l, item), btrfs_item_size(l, item));
204 case BTRFS_INODE_ITEM_KEY:
205 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
206 pr_info("\t\tinode generation %llu size %llu mode %o\n",
207 btrfs_inode_generation(l, ii),
208 btrfs_inode_size(l, ii),
209 btrfs_inode_mode(l, ii));
211 case BTRFS_DIR_ITEM_KEY:
212 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
213 btrfs_dir_item_key_to_cpu(l, di, &found_key);
214 pr_info("\t\tdir oid %llu type %u\n",
216 btrfs_dir_type(l, di));
218 case BTRFS_ROOT_ITEM_KEY:
219 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
220 pr_info("\t\troot data bytenr %llu refs %u\n",
221 btrfs_disk_root_bytenr(l, ri),
222 btrfs_disk_root_refs(l, ri));
224 case BTRFS_EXTENT_ITEM_KEY:
225 case BTRFS_METADATA_ITEM_KEY:
226 print_extent_item(l, i, type);
228 case BTRFS_TREE_BLOCK_REF_KEY:
229 pr_info("\t\ttree block backref\n");
231 case BTRFS_SHARED_BLOCK_REF_KEY:
232 pr_info("\t\tshared block backref\n");
234 case BTRFS_EXTENT_DATA_REF_KEY:
235 dref = btrfs_item_ptr(l, i,
236 struct btrfs_extent_data_ref);
237 print_extent_data_ref(l, dref);
239 case BTRFS_SHARED_DATA_REF_KEY:
240 sref = btrfs_item_ptr(l, i,
241 struct btrfs_shared_data_ref);
242 pr_info("\t\tshared data backref count %u\n",
243 btrfs_shared_data_ref_count(l, sref));
245 case BTRFS_EXTENT_DATA_KEY:
246 fi = btrfs_item_ptr(l, i,
247 struct btrfs_file_extent_item);
248 if (btrfs_file_extent_type(l, fi) ==
249 BTRFS_FILE_EXTENT_INLINE) {
250 pr_info("\t\tinline extent data size %llu\n",
251 btrfs_file_extent_ram_bytes(l, fi));
254 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
255 btrfs_file_extent_disk_bytenr(l, fi),
256 btrfs_file_extent_disk_num_bytes(l, fi));
257 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
258 btrfs_file_extent_offset(l, fi),
259 btrfs_file_extent_num_bytes(l, fi),
260 btrfs_file_extent_ram_bytes(l, fi));
262 case BTRFS_EXTENT_REF_V0_KEY:
263 btrfs_print_v0_err(fs_info);
264 btrfs_handle_fs_error(fs_info, -EINVAL, NULL);
266 case BTRFS_BLOCK_GROUP_ITEM_KEY:
267 bi = btrfs_item_ptr(l, i,
268 struct btrfs_block_group_item);
270 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
271 btrfs_disk_block_group_used(l, bi),
272 btrfs_disk_block_group_chunk_objectid(l, bi),
273 btrfs_disk_block_group_flags(l, bi));
275 case BTRFS_CHUNK_ITEM_KEY:
276 print_chunk(l, btrfs_item_ptr(l, i,
277 struct btrfs_chunk));
279 case BTRFS_DEV_ITEM_KEY:
280 print_dev_item(l, btrfs_item_ptr(l, i,
281 struct btrfs_dev_item));
283 case BTRFS_DEV_EXTENT_KEY:
284 dev_extent = btrfs_item_ptr(l, i,
285 struct btrfs_dev_extent);
286 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
287 btrfs_dev_extent_chunk_tree(l, dev_extent),
288 btrfs_dev_extent_chunk_objectid(l, dev_extent),
289 btrfs_dev_extent_chunk_offset(l, dev_extent),
290 btrfs_dev_extent_length(l, dev_extent));
292 case BTRFS_PERSISTENT_ITEM_KEY:
293 pr_info("\t\tpersistent item objectid %llu offset %llu\n",
294 key.objectid, key.offset);
295 switch (key.objectid) {
296 case BTRFS_DEV_STATS_OBJECTID:
297 pr_info("\t\tdevice stats\n");
300 pr_info("\t\tunknown persistent item\n");
303 case BTRFS_TEMPORARY_ITEM_KEY:
304 pr_info("\t\ttemporary item objectid %llu offset %llu\n",
305 key.objectid, key.offset);
306 switch (key.objectid) {
307 case BTRFS_BALANCE_OBJECTID:
308 pr_info("\t\tbalance status\n");
311 pr_info("\t\tunknown temporary item\n");
314 case BTRFS_DEV_REPLACE_KEY:
315 pr_info("\t\tdev replace\n");
317 case BTRFS_UUID_KEY_SUBVOL:
318 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
319 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
320 btrfs_item_size_nr(l, i));
326 void btrfs_print_tree(struct extent_buffer *c, bool follow)
328 struct btrfs_fs_info *fs_info;
330 struct btrfs_key key;
335 fs_info = c->fs_info;
336 nr = btrfs_header_nritems(c);
337 level = btrfs_header_level(c);
343 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
344 btrfs_header_bytenr(c), level, btrfs_header_generation(c),
345 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
346 btrfs_header_owner(c));
347 print_eb_refs_lock(c);
348 for (i = 0; i < nr; i++) {
349 btrfs_node_key_to_cpu(c, &key, i);
350 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
351 i, key.objectid, key.type, key.offset,
352 btrfs_node_blockptr(c, i),
353 btrfs_node_ptr_generation(c, i));
357 for (i = 0; i < nr; i++) {
358 struct btrfs_key first_key;
359 struct extent_buffer *next;
361 btrfs_node_key_to_cpu(c, &first_key, i);
362 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i),
363 btrfs_node_ptr_generation(c, i),
364 level - 1, &first_key);
367 } else if (!extent_buffer_uptodate(next)) {
368 free_extent_buffer(next);
372 if (btrfs_is_leaf(next) &&
375 if (btrfs_header_level(next) !=
378 btrfs_print_tree(next, follow);
379 free_extent_buffer(next);