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1/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
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 printk(KERN_INFO "\t\tchunk length %llu owner %llu type %llu "
28 "num_stripes %d\n",
29 (unsigned long long)btrfs_chunk_length(eb, chunk),
30 (unsigned long long)btrfs_chunk_owner(eb, chunk),
31 (unsigned long long)btrfs_chunk_type(eb, chunk),
32 num_stripes);
33 for (i = 0 ; i < num_stripes ; i++) {
34 printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i,
35 (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
36 (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
37 }
38}
39static void print_dev_item(struct extent_buffer *eb,
40 struct btrfs_dev_item *dev_item)
41{
42 printk(KERN_INFO "\t\tdev item devid %llu "
43 "total_bytes %llu bytes used %llu\n",
44 (unsigned long long)btrfs_device_id(eb, dev_item),
45 (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
46 (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
47}
48static void print_extent_data_ref(struct extent_buffer *eb,
49 struct btrfs_extent_data_ref *ref)
50{
51 printk(KERN_INFO "\t\textent data backref root %llu "
52 "objectid %llu offset %llu count %u\n",
53 (unsigned long long)btrfs_extent_data_ref_root(eb, ref),
54 (unsigned long long)btrfs_extent_data_ref_objectid(eb, ref),
55 (unsigned long long)btrfs_extent_data_ref_offset(eb, ref),
56 btrfs_extent_data_ref_count(eb, ref));
57}
58
59static void print_extent_item(struct extent_buffer *eb, int slot)
60{
61 struct btrfs_extent_item *ei;
62 struct btrfs_extent_inline_ref *iref;
63 struct btrfs_extent_data_ref *dref;
64 struct btrfs_shared_data_ref *sref;
65 struct btrfs_disk_key key;
66 unsigned long end;
67 unsigned long ptr;
68 int type;
69 u32 item_size = btrfs_item_size_nr(eb, slot);
70 u64 flags;
71 u64 offset;
72
73 if (item_size < sizeof(*ei)) {
74#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
75 struct btrfs_extent_item_v0 *ei0;
76 BUG_ON(item_size != sizeof(*ei0));
77 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
78 printk(KERN_INFO "\t\textent refs %u\n",
79 btrfs_extent_refs_v0(eb, ei0));
80 return;
81#else
82 BUG();
83#endif
84 }
85
86 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
87 flags = btrfs_extent_flags(eb, ei);
88
89 printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n",
90 (unsigned long long)btrfs_extent_refs(eb, ei),
91 (unsigned long long)btrfs_extent_generation(eb, ei),
92 (unsigned long long)flags);
93
94 if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
95 struct btrfs_tree_block_info *info;
96 info = (struct btrfs_tree_block_info *)(ei + 1);
97 btrfs_tree_block_key(eb, info, &key);
98 printk(KERN_INFO "\t\ttree block key (%llu %x %llu) "
99 "level %d\n",
100 (unsigned long long)btrfs_disk_key_objectid(&key),
101 key.type,
102 (unsigned long long)btrfs_disk_key_offset(&key),
103 btrfs_tree_block_level(eb, info));
104 iref = (struct btrfs_extent_inline_ref *)(info + 1);
105 } else {
106 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
107 }
108
109 ptr = (unsigned long)iref;
110 end = (unsigned long)ei + item_size;
111 while (ptr < end) {
112 iref = (struct btrfs_extent_inline_ref *)ptr;
113 type = btrfs_extent_inline_ref_type(eb, iref);
114 offset = btrfs_extent_inline_ref_offset(eb, iref);
115 switch (type) {
116 case BTRFS_TREE_BLOCK_REF_KEY:
117 printk(KERN_INFO "\t\ttree block backref "
118 "root %llu\n", (unsigned long long)offset);
119 break;
120 case BTRFS_SHARED_BLOCK_REF_KEY:
121 printk(KERN_INFO "\t\tshared block backref "
122 "parent %llu\n", (unsigned long long)offset);
123 break;
124 case BTRFS_EXTENT_DATA_REF_KEY:
125 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
126 print_extent_data_ref(eb, dref);
127 break;
128 case BTRFS_SHARED_DATA_REF_KEY:
129 sref = (struct btrfs_shared_data_ref *)(iref + 1);
130 printk(KERN_INFO "\t\tshared data backref "
131 "parent %llu count %u\n",
132 (unsigned long long)offset,
133 btrfs_shared_data_ref_count(eb, sref));
134 break;
135 default:
136 BUG();
137 }
138 ptr += btrfs_extent_inline_ref_size(type);
139 }
140 WARN_ON(ptr > end);
141}
142
143#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
144static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
145{
146 struct btrfs_extent_ref_v0 *ref0;
147
148 ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
149 printk("\t\textent back ref root %llu gen %llu "
150 "owner %llu num_refs %lu\n",
151 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
152 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
153 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
154 (unsigned long)btrfs_ref_count_v0(eb, ref0));
155}
156#endif
157
158void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
159{
160 int i;
161 u32 type;
162 u32 nr = btrfs_header_nritems(l);
163 struct btrfs_item *item;
164 struct btrfs_root_item *ri;
165 struct btrfs_dir_item *di;
166 struct btrfs_inode_item *ii;
167 struct btrfs_block_group_item *bi;
168 struct btrfs_file_extent_item *fi;
169 struct btrfs_extent_data_ref *dref;
170 struct btrfs_shared_data_ref *sref;
171 struct btrfs_dev_extent *dev_extent;
172 struct btrfs_key key;
173 struct btrfs_key found_key;
174
175 printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n",
176 (unsigned long long)btrfs_header_bytenr(l), nr,
177 btrfs_leaf_free_space(root, l));
178 for (i = 0 ; i < nr ; i++) {
179 item = btrfs_item_nr(l, i);
180 btrfs_item_key_to_cpu(l, &key, i);
181 type = btrfs_key_type(&key);
182 printk(KERN_INFO "\titem %d key (%llu %x %llu) itemoff %d "
183 "itemsize %d\n",
184 i,
185 (unsigned long long)key.objectid, type,
186 (unsigned long long)key.offset,
187 btrfs_item_offset(l, item), btrfs_item_size(l, item));
188 switch (type) {
189 case BTRFS_INODE_ITEM_KEY:
190 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
191 printk(KERN_INFO "\t\tinode generation %llu size %llu "
192 "mode %o\n",
193 (unsigned long long)
194 btrfs_inode_generation(l, ii),
195 (unsigned long long)btrfs_inode_size(l, ii),
196 btrfs_inode_mode(l, ii));
197 break;
198 case BTRFS_DIR_ITEM_KEY:
199 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
200 btrfs_dir_item_key_to_cpu(l, di, &found_key);
201 printk(KERN_INFO "\t\tdir oid %llu type %u\n",
202 (unsigned long long)found_key.objectid,
203 btrfs_dir_type(l, di));
204 break;
205 case BTRFS_ROOT_ITEM_KEY:
206 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
207 printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
208 (unsigned long long)
209 btrfs_disk_root_bytenr(l, ri),
210 btrfs_disk_root_refs(l, ri));
211 break;
212 case BTRFS_EXTENT_ITEM_KEY:
213 print_extent_item(l, i);
214 break;
215 case BTRFS_TREE_BLOCK_REF_KEY:
216 printk(KERN_INFO "\t\ttree block backref\n");
217 break;
218 case BTRFS_SHARED_BLOCK_REF_KEY:
219 printk(KERN_INFO "\t\tshared block backref\n");
220 break;
221 case BTRFS_EXTENT_DATA_REF_KEY:
222 dref = btrfs_item_ptr(l, i,
223 struct btrfs_extent_data_ref);
224 print_extent_data_ref(l, dref);
225 break;
226 case BTRFS_SHARED_DATA_REF_KEY:
227 sref = btrfs_item_ptr(l, i,
228 struct btrfs_shared_data_ref);
229 printk(KERN_INFO "\t\tshared data backref count %u\n",
230 btrfs_shared_data_ref_count(l, sref));
231 break;
232 case BTRFS_EXTENT_DATA_KEY:
233 fi = btrfs_item_ptr(l, i,
234 struct btrfs_file_extent_item);
235 if (btrfs_file_extent_type(l, fi) ==
236 BTRFS_FILE_EXTENT_INLINE) {
237 printk(KERN_INFO "\t\tinline extent data "
238 "size %u\n",
239 btrfs_file_extent_inline_len(l, fi));
240 break;
241 }
242 printk(KERN_INFO "\t\textent data disk bytenr %llu "
243 "nr %llu\n",
244 (unsigned long long)
245 btrfs_file_extent_disk_bytenr(l, fi),
246 (unsigned long long)
247 btrfs_file_extent_disk_num_bytes(l, fi));
248 printk(KERN_INFO "\t\textent data offset %llu "
249 "nr %llu ram %llu\n",
250 (unsigned long long)
251 btrfs_file_extent_offset(l, fi),
252 (unsigned long long)
253 btrfs_file_extent_num_bytes(l, fi),
254 (unsigned long long)
255 btrfs_file_extent_ram_bytes(l, fi));
256 break;
257 case BTRFS_EXTENT_REF_V0_KEY:
258#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
259 print_extent_ref_v0(l, i);
260#else
261 BUG();
262#endif
263 break;
264 case BTRFS_BLOCK_GROUP_ITEM_KEY:
265 bi = btrfs_item_ptr(l, i,
266 struct btrfs_block_group_item);
267 printk(KERN_INFO "\t\tblock group used %llu\n",
268 (unsigned long long)
269 btrfs_disk_block_group_used(l, bi));
270 break;
271 case BTRFS_CHUNK_ITEM_KEY:
272 print_chunk(l, btrfs_item_ptr(l, i,
273 struct btrfs_chunk));
274 break;
275 case BTRFS_DEV_ITEM_KEY:
276 print_dev_item(l, btrfs_item_ptr(l, i,
277 struct btrfs_dev_item));
278 break;
279 case BTRFS_DEV_EXTENT_KEY:
280 dev_extent = btrfs_item_ptr(l, i,
281 struct btrfs_dev_extent);
282 printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
283 "\t\tchunk objectid %llu chunk offset %llu "
284 "length %llu\n",
285 (unsigned long long)
286 btrfs_dev_extent_chunk_tree(l, dev_extent),
287 (unsigned long long)
288 btrfs_dev_extent_chunk_objectid(l, dev_extent),
289 (unsigned long long)
290 btrfs_dev_extent_chunk_offset(l, dev_extent),
291 (unsigned long long)
292 btrfs_dev_extent_length(l, dev_extent));
293 };
294 }
295}
296
297void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
298{
299 int i; u32 nr;
300 struct btrfs_key key;
301 int level;
302
303 if (!c)
304 return;
305 nr = btrfs_header_nritems(c);
306 level = btrfs_header_level(c);
307 if (level == 0) {
308 btrfs_print_leaf(root, c);
309 return;
310 }
311 printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n",
312 (unsigned long long)btrfs_header_bytenr(c),
313 level, nr,
314 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
315 for (i = 0; i < nr; i++) {
316 btrfs_node_key_to_cpu(c, &key, i);
317 printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
318 i,
319 (unsigned long long)key.objectid,
320 key.type,
321 (unsigned long long)key.offset,
322 (unsigned long long)btrfs_node_blockptr(c, i));
323 }
324 for (i = 0; i < nr; i++) {
325 struct extent_buffer *next = read_tree_block(root,
326 btrfs_node_blockptr(c, i),
327 btrfs_level_size(root, level - 1),
328 btrfs_node_ptr_generation(c, i));
329 if (btrfs_is_leaf(next) &&
330 level != 1)
331 BUG();
332 if (btrfs_header_level(next) !=
333 level - 1)
334 BUG();
335 btrfs_print_tree(root, next);
336 free_extent_buffer(next);
337 }
338}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2007 Oracle. All rights reserved.
4 */
5
6#include "messages.h"
7#include "ctree.h"
8#include "disk-io.h"
9#include "print-tree.h"
10#include "accessors.h"
11#include "tree-checker.h"
12#include "volumes.h"
13#include "raid-stripe-tree.h"
14
15struct root_name_map {
16 u64 id;
17 char name[16];
18};
19
20static const struct root_name_map root_map[] = {
21 { BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" },
22 { BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" },
23 { BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" },
24 { BTRFS_DEV_TREE_OBJECTID, "DEV_TREE" },
25 { BTRFS_FS_TREE_OBJECTID, "FS_TREE" },
26 { BTRFS_CSUM_TREE_OBJECTID, "CSUM_TREE" },
27 { BTRFS_TREE_LOG_OBJECTID, "TREE_LOG" },
28 { BTRFS_QUOTA_TREE_OBJECTID, "QUOTA_TREE" },
29 { BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
30 { BTRFS_FREE_SPACE_TREE_OBJECTID, "FREE_SPACE_TREE" },
31 { BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" },
32 { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" },
33 { BTRFS_RAID_STRIPE_TREE_OBJECTID, "RAID_STRIPE_TREE" },
34};
35
36const char *btrfs_root_name(const struct btrfs_key *key, char *buf)
37{
38 int i;
39
40 if (key->objectid == BTRFS_TREE_RELOC_OBJECTID) {
41 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN,
42 "TREE_RELOC offset=%llu", key->offset);
43 return buf;
44 }
45
46 for (i = 0; i < ARRAY_SIZE(root_map); i++) {
47 if (root_map[i].id == key->objectid)
48 return root_map[i].name;
49 }
50
51 snprintf(buf, BTRFS_ROOT_NAME_BUF_LEN, "%llu", key->objectid);
52 return buf;
53}
54
55static void print_chunk(const struct extent_buffer *eb, struct btrfs_chunk *chunk)
56{
57 int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
58 int i;
59 pr_info("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
60 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
61 btrfs_chunk_type(eb, chunk), num_stripes);
62 for (i = 0 ; i < num_stripes ; i++) {
63 pr_info("\t\t\tstripe %d devid %llu offset %llu\n", i,
64 btrfs_stripe_devid_nr(eb, chunk, i),
65 btrfs_stripe_offset_nr(eb, chunk, i));
66 }
67}
68static void print_dev_item(const struct extent_buffer *eb,
69 struct btrfs_dev_item *dev_item)
70{
71 pr_info("\t\tdev item devid %llu total_bytes %llu bytes used %llu\n",
72 btrfs_device_id(eb, dev_item),
73 btrfs_device_total_bytes(eb, dev_item),
74 btrfs_device_bytes_used(eb, dev_item));
75}
76static void print_extent_data_ref(const struct extent_buffer *eb,
77 struct btrfs_extent_data_ref *ref)
78{
79 pr_cont("extent data backref root %llu objectid %llu offset %llu count %u\n",
80 btrfs_extent_data_ref_root(eb, ref),
81 btrfs_extent_data_ref_objectid(eb, ref),
82 btrfs_extent_data_ref_offset(eb, ref),
83 btrfs_extent_data_ref_count(eb, ref));
84}
85
86static void print_extent_owner_ref(const struct extent_buffer *eb,
87 const struct btrfs_extent_owner_ref *ref)
88{
89 ASSERT(btrfs_fs_incompat(eb->fs_info, SIMPLE_QUOTA));
90 pr_cont("extent data owner root %llu\n", btrfs_extent_owner_ref_root_id(eb, ref));
91}
92
93static void print_extent_item(const struct extent_buffer *eb, int slot, int type)
94{
95 struct btrfs_extent_item *ei;
96 struct btrfs_extent_inline_ref *iref;
97 struct btrfs_extent_data_ref *dref;
98 struct btrfs_shared_data_ref *sref;
99 struct btrfs_extent_owner_ref *oref;
100 struct btrfs_disk_key key;
101 unsigned long end;
102 unsigned long ptr;
103 u32 item_size = btrfs_item_size(eb, slot);
104 u64 flags;
105 u64 offset;
106 int ref_index = 0;
107
108 if (unlikely(item_size < sizeof(*ei))) {
109 btrfs_err(eb->fs_info,
110 "unexpected extent item size, has %u expect >= %zu",
111 item_size, sizeof(*ei));
112 btrfs_handle_fs_error(eb->fs_info, -EUCLEAN, NULL);
113 }
114
115 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
116 flags = btrfs_extent_flags(eb, ei);
117
118 pr_info("\t\textent refs %llu gen %llu flags %llu\n",
119 btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
120 flags);
121
122 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
123 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
124 struct btrfs_tree_block_info *info;
125 info = (struct btrfs_tree_block_info *)(ei + 1);
126 btrfs_tree_block_key(eb, info, &key);
127 pr_info("\t\ttree block key (%llu %u %llu) level %d\n",
128 btrfs_disk_key_objectid(&key), key.type,
129 btrfs_disk_key_offset(&key),
130 btrfs_tree_block_level(eb, info));
131 iref = (struct btrfs_extent_inline_ref *)(info + 1);
132 } else {
133 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
134 }
135
136 ptr = (unsigned long)iref;
137 end = (unsigned long)ei + item_size;
138 while (ptr < end) {
139 iref = (struct btrfs_extent_inline_ref *)ptr;
140 type = btrfs_extent_inline_ref_type(eb, iref);
141 offset = btrfs_extent_inline_ref_offset(eb, iref);
142 pr_info("\t\tref#%d: ", ref_index++);
143 switch (type) {
144 case BTRFS_TREE_BLOCK_REF_KEY:
145 pr_cont("tree block backref root %llu\n", offset);
146 break;
147 case BTRFS_SHARED_BLOCK_REF_KEY:
148 pr_cont("shared block backref parent %llu\n", offset);
149 /*
150 * offset is supposed to be a tree block which
151 * must be aligned to nodesize.
152 */
153 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
154 pr_info(
155 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
156 offset, eb->fs_info->sectorsize);
157 break;
158 case BTRFS_EXTENT_DATA_REF_KEY:
159 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
160 print_extent_data_ref(eb, dref);
161 break;
162 case BTRFS_SHARED_DATA_REF_KEY:
163 sref = (struct btrfs_shared_data_ref *)(iref + 1);
164 pr_cont("shared data backref parent %llu count %u\n",
165 offset, btrfs_shared_data_ref_count(eb, sref));
166 /*
167 * Offset is supposed to be a tree block which must be
168 * aligned to sectorsize.
169 */
170 if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
171 pr_info(
172 "\t\t\t(parent %llu not aligned to sectorsize %u)\n",
173 offset, eb->fs_info->sectorsize);
174 break;
175 case BTRFS_EXTENT_OWNER_REF_KEY:
176 oref = (struct btrfs_extent_owner_ref *)(&iref->offset);
177 print_extent_owner_ref(eb, oref);
178 break;
179 default:
180 pr_cont("(extent %llu has INVALID ref type %d)\n",
181 eb->start, type);
182 return;
183 }
184 ptr += btrfs_extent_inline_ref_size(type);
185 }
186 WARN_ON(ptr > end);
187}
188
189static void print_uuid_item(const struct extent_buffer *l, unsigned long offset,
190 u32 item_size)
191{
192 if (!IS_ALIGNED(item_size, sizeof(u64))) {
193 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
194 (unsigned long)item_size);
195 return;
196 }
197 while (item_size) {
198 __le64 subvol_id;
199
200 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
201 pr_info("\t\tsubvol_id %llu\n", le64_to_cpu(subvol_id));
202 item_size -= sizeof(u64);
203 offset += sizeof(u64);
204 }
205}
206
207static void print_raid_stripe_key(const struct extent_buffer *eb, u32 item_size,
208 struct btrfs_stripe_extent *stripe)
209{
210 const int num_stripes = btrfs_num_raid_stripes(item_size);
211 const u8 encoding = btrfs_stripe_extent_encoding(eb, stripe);
212
213 pr_info("\t\t\tencoding: %s\n",
214 (encoding && encoding < BTRFS_NR_RAID_TYPES) ?
215 btrfs_raid_array[encoding].raid_name : "unknown");
216
217 for (int i = 0; i < num_stripes; i++)
218 pr_info("\t\t\tstride %d devid %llu physical %llu\n",
219 i, btrfs_raid_stride_devid(eb, &stripe->strides[i]),
220 btrfs_raid_stride_physical(eb, &stripe->strides[i]));
221}
222
223/*
224 * Helper to output refs and locking status of extent buffer. Useful to debug
225 * race condition related problems.
226 */
227static void print_eb_refs_lock(const struct extent_buffer *eb)
228{
229#ifdef CONFIG_BTRFS_DEBUG
230 btrfs_info(eb->fs_info, "refs %u lock_owner %u current %u",
231 atomic_read(&eb->refs), eb->lock_owner, current->pid);
232#endif
233}
234
235void btrfs_print_leaf(const struct extent_buffer *l)
236{
237 struct btrfs_fs_info *fs_info;
238 int i;
239 u32 type, nr;
240 struct btrfs_root_item *ri;
241 struct btrfs_dir_item *di;
242 struct btrfs_inode_item *ii;
243 struct btrfs_block_group_item *bi;
244 struct btrfs_file_extent_item *fi;
245 struct btrfs_extent_data_ref *dref;
246 struct btrfs_shared_data_ref *sref;
247 struct btrfs_dev_extent *dev_extent;
248 struct btrfs_key key;
249 struct btrfs_key found_key;
250
251 if (!l)
252 return;
253
254 fs_info = l->fs_info;
255 nr = btrfs_header_nritems(l);
256
257 btrfs_info(fs_info,
258 "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
259 btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
260 btrfs_leaf_free_space(l), btrfs_header_owner(l));
261 print_eb_refs_lock(l);
262 for (i = 0 ; i < nr ; i++) {
263 btrfs_item_key_to_cpu(l, &key, i);
264 type = key.type;
265 pr_info("\titem %d key (%llu %u %llu) itemoff %d itemsize %d\n",
266 i, key.objectid, type, key.offset,
267 btrfs_item_offset(l, i), btrfs_item_size(l, i));
268 switch (type) {
269 case BTRFS_INODE_ITEM_KEY:
270 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
271 pr_info("\t\tinode generation %llu size %llu mode %o\n",
272 btrfs_inode_generation(l, ii),
273 btrfs_inode_size(l, ii),
274 btrfs_inode_mode(l, ii));
275 break;
276 case BTRFS_DIR_ITEM_KEY:
277 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
278 btrfs_dir_item_key_to_cpu(l, di, &found_key);
279 pr_info("\t\tdir oid %llu flags %u\n",
280 found_key.objectid,
281 btrfs_dir_flags(l, di));
282 break;
283 case BTRFS_ROOT_ITEM_KEY:
284 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
285 pr_info("\t\troot data bytenr %llu refs %u\n",
286 btrfs_disk_root_bytenr(l, ri),
287 btrfs_disk_root_refs(l, ri));
288 break;
289 case BTRFS_EXTENT_ITEM_KEY:
290 case BTRFS_METADATA_ITEM_KEY:
291 print_extent_item(l, i, type);
292 break;
293 case BTRFS_TREE_BLOCK_REF_KEY:
294 pr_info("\t\ttree block backref\n");
295 break;
296 case BTRFS_SHARED_BLOCK_REF_KEY:
297 pr_info("\t\tshared block backref\n");
298 break;
299 case BTRFS_EXTENT_DATA_REF_KEY:
300 dref = btrfs_item_ptr(l, i,
301 struct btrfs_extent_data_ref);
302 print_extent_data_ref(l, dref);
303 break;
304 case BTRFS_SHARED_DATA_REF_KEY:
305 sref = btrfs_item_ptr(l, i,
306 struct btrfs_shared_data_ref);
307 pr_info("\t\tshared data backref count %u\n",
308 btrfs_shared_data_ref_count(l, sref));
309 break;
310 case BTRFS_EXTENT_DATA_KEY:
311 fi = btrfs_item_ptr(l, i,
312 struct btrfs_file_extent_item);
313 if (btrfs_file_extent_type(l, fi) ==
314 BTRFS_FILE_EXTENT_INLINE) {
315 pr_info("\t\tinline extent data size %llu\n",
316 btrfs_file_extent_ram_bytes(l, fi));
317 break;
318 }
319 pr_info("\t\textent data disk bytenr %llu nr %llu\n",
320 btrfs_file_extent_disk_bytenr(l, fi),
321 btrfs_file_extent_disk_num_bytes(l, fi));
322 pr_info("\t\textent data offset %llu nr %llu ram %llu\n",
323 btrfs_file_extent_offset(l, fi),
324 btrfs_file_extent_num_bytes(l, fi),
325 btrfs_file_extent_ram_bytes(l, fi));
326 break;
327 case BTRFS_BLOCK_GROUP_ITEM_KEY:
328 bi = btrfs_item_ptr(l, i,
329 struct btrfs_block_group_item);
330 pr_info(
331 "\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
332 btrfs_block_group_used(l, bi),
333 btrfs_block_group_chunk_objectid(l, bi),
334 btrfs_block_group_flags(l, bi));
335 break;
336 case BTRFS_CHUNK_ITEM_KEY:
337 print_chunk(l, btrfs_item_ptr(l, i,
338 struct btrfs_chunk));
339 break;
340 case BTRFS_DEV_ITEM_KEY:
341 print_dev_item(l, btrfs_item_ptr(l, i,
342 struct btrfs_dev_item));
343 break;
344 case BTRFS_DEV_EXTENT_KEY:
345 dev_extent = btrfs_item_ptr(l, i,
346 struct btrfs_dev_extent);
347 pr_info("\t\tdev extent chunk_tree %llu\n\t\tchunk objectid %llu chunk offset %llu length %llu\n",
348 btrfs_dev_extent_chunk_tree(l, dev_extent),
349 btrfs_dev_extent_chunk_objectid(l, dev_extent),
350 btrfs_dev_extent_chunk_offset(l, dev_extent),
351 btrfs_dev_extent_length(l, dev_extent));
352 break;
353 case BTRFS_PERSISTENT_ITEM_KEY:
354 pr_info("\t\tpersistent item objectid %llu offset %llu\n",
355 key.objectid, key.offset);
356 switch (key.objectid) {
357 case BTRFS_DEV_STATS_OBJECTID:
358 pr_info("\t\tdevice stats\n");
359 break;
360 default:
361 pr_info("\t\tunknown persistent item\n");
362 }
363 break;
364 case BTRFS_TEMPORARY_ITEM_KEY:
365 pr_info("\t\ttemporary item objectid %llu offset %llu\n",
366 key.objectid, key.offset);
367 switch (key.objectid) {
368 case BTRFS_BALANCE_OBJECTID:
369 pr_info("\t\tbalance status\n");
370 break;
371 default:
372 pr_info("\t\tunknown temporary item\n");
373 }
374 break;
375 case BTRFS_DEV_REPLACE_KEY:
376 pr_info("\t\tdev replace\n");
377 break;
378 case BTRFS_UUID_KEY_SUBVOL:
379 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
380 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
381 btrfs_item_size(l, i));
382 break;
383 case BTRFS_RAID_STRIPE_KEY:
384 print_raid_stripe_key(l, btrfs_item_size(l, i),
385 btrfs_item_ptr(l, i, struct btrfs_stripe_extent));
386 break;
387 }
388 }
389}
390
391void btrfs_print_tree(const struct extent_buffer *c, bool follow)
392{
393 struct btrfs_fs_info *fs_info;
394 int i; u32 nr;
395 struct btrfs_key key;
396 int level;
397
398 if (!c)
399 return;
400 fs_info = c->fs_info;
401 nr = btrfs_header_nritems(c);
402 level = btrfs_header_level(c);
403 if (level == 0) {
404 btrfs_print_leaf(c);
405 return;
406 }
407 btrfs_info(fs_info,
408 "node %llu level %d gen %llu total ptrs %d free spc %u owner %llu",
409 btrfs_header_bytenr(c), level, btrfs_header_generation(c),
410 nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr,
411 btrfs_header_owner(c));
412 print_eb_refs_lock(c);
413 for (i = 0; i < nr; i++) {
414 btrfs_node_key_to_cpu(c, &key, i);
415 pr_info("\tkey %d (%llu %u %llu) block %llu gen %llu\n",
416 i, key.objectid, key.type, key.offset,
417 btrfs_node_blockptr(c, i),
418 btrfs_node_ptr_generation(c, i));
419 }
420 if (!follow)
421 return;
422 for (i = 0; i < nr; i++) {
423 struct btrfs_tree_parent_check check = {
424 .level = level - 1,
425 .transid = btrfs_node_ptr_generation(c, i),
426 .owner_root = btrfs_header_owner(c),
427 .has_first_key = true
428 };
429 struct extent_buffer *next;
430
431 btrfs_node_key_to_cpu(c, &check.first_key, i);
432 next = read_tree_block(fs_info, btrfs_node_blockptr(c, i), &check);
433 if (IS_ERR(next))
434 continue;
435 if (!extent_buffer_uptodate(next)) {
436 free_extent_buffer(next);
437 continue;
438 }
439
440 if (btrfs_is_leaf(next) &&
441 level != 1)
442 BUG();
443 if (btrfs_header_level(next) !=
444 level - 1)
445 BUG();
446 btrfs_print_tree(next, follow);
447 free_extent_buffer(next);
448 }
449}