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