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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 btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
30 btrfs_chunk_type(eb, chunk), num_stripes);
31 for (i = 0 ; i < num_stripes ; i++) {
32 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}
37static void print_dev_item(struct extent_buffer *eb,
38 struct btrfs_dev_item *dev_item)
39{
40 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}
46static void print_extent_data_ref(struct extent_buffer *eb,
47 struct btrfs_extent_data_ref *ref)
48{
49 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}
56
57static 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 if (item_size < sizeof(*ei)) {
71#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
72 struct btrfs_extent_item_v0 *ei0;
73 BUG_ON(item_size != sizeof(*ei0));
74 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
75 printk(KERN_INFO "\t\textent refs %u\n",
76 btrfs_extent_refs_v0(eb, ei0));
77 return;
78#else
79 BUG();
80#endif
81 }
82
83 ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
84 flags = btrfs_extent_flags(eb, ei);
85
86 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 if ((type == BTRFS_EXTENT_ITEM_KEY) &&
91 flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
92 struct btrfs_tree_block_info *info;
93 info = (struct btrfs_tree_block_info *)(ei + 1);
94 btrfs_tree_block_key(eb, info, &key);
95 printk(KERN_INFO "\t\ttree block key (%llu %u %llu) "
96 "level %d\n",
97 btrfs_disk_key_objectid(&key), key.type,
98 btrfs_disk_key_offset(&key),
99 btrfs_tree_block_level(eb, info));
100 iref = (struct btrfs_extent_inline_ref *)(info + 1);
101 } else {
102 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
103 }
104
105 ptr = (unsigned long)iref;
106 end = (unsigned long)ei + item_size;
107 while (ptr < end) {
108 iref = (struct btrfs_extent_inline_ref *)ptr;
109 type = btrfs_extent_inline_ref_type(eb, iref);
110 offset = btrfs_extent_inline_ref_offset(eb, iref);
111 switch (type) {
112 case BTRFS_TREE_BLOCK_REF_KEY:
113 printk(KERN_INFO "\t\ttree block backref "
114 "root %llu\n", offset);
115 break;
116 case BTRFS_SHARED_BLOCK_REF_KEY:
117 printk(KERN_INFO "\t\tshared block backref "
118 "parent %llu\n", offset);
119 break;
120 case BTRFS_EXTENT_DATA_REF_KEY:
121 dref = (struct btrfs_extent_data_ref *)(&iref->offset);
122 print_extent_data_ref(eb, dref);
123 break;
124 case BTRFS_SHARED_DATA_REF_KEY:
125 sref = (struct btrfs_shared_data_ref *)(iref + 1);
126 printk(KERN_INFO "\t\tshared data backref "
127 "parent %llu count %u\n",
128 offset, btrfs_shared_data_ref_count(eb, sref));
129 break;
130 default:
131 BUG();
132 }
133 ptr += btrfs_extent_inline_ref_size(type);
134 }
135 WARN_ON(ptr > end);
136}
137
138#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
139static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
140{
141 struct btrfs_extent_ref_v0 *ref0;
142
143 ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
144 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}
151#endif
152
153static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
154 u32 item_size)
155{
156 if (!IS_ALIGNED(item_size, sizeof(u64))) {
157 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
158 (unsigned long)item_size);
159 return;
160 }
161 while (item_size) {
162 __le64 subvol_id;
163
164 read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
165 printk(KERN_INFO "\t\tsubvol_id %llu\n",
166 (unsigned long long)le64_to_cpu(subvol_id));
167 item_size -= sizeof(u64);
168 offset += sizeof(u64);
169 }
170}
171
172void 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 if (!l)
189 return;
190
191 nr = btrfs_header_nritems(l);
192
193 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 for (i = 0 ; i < nr ; i++) {
196 item = btrfs_item_nr(i);
197 btrfs_item_key_to_cpu(l, &key, i);
198 type = key.type;
199 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 switch (type) {
204 case BTRFS_INODE_ITEM_KEY:
205 ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
206 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 break;
212 case BTRFS_DIR_ITEM_KEY:
213 di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
214 btrfs_dir_item_key_to_cpu(l, di, &found_key);
215 printk(KERN_INFO "\t\tdir oid %llu type %u\n",
216 found_key.objectid,
217 btrfs_dir_type(l, di));
218 break;
219 case BTRFS_ROOT_ITEM_KEY:
220 ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
221 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 break;
225 case BTRFS_EXTENT_ITEM_KEY:
226 case BTRFS_METADATA_ITEM_KEY:
227 print_extent_item(l, i, type);
228 break;
229 case BTRFS_TREE_BLOCK_REF_KEY:
230 printk(KERN_INFO "\t\ttree block backref\n");
231 break;
232 case BTRFS_SHARED_BLOCK_REF_KEY:
233 printk(KERN_INFO "\t\tshared block backref\n");
234 break;
235 case BTRFS_EXTENT_DATA_REF_KEY:
236 dref = btrfs_item_ptr(l, i,
237 struct btrfs_extent_data_ref);
238 print_extent_data_ref(l, dref);
239 break;
240 case BTRFS_SHARED_DATA_REF_KEY:
241 sref = btrfs_item_ptr(l, i,
242 struct btrfs_shared_data_ref);
243 printk(KERN_INFO "\t\tshared data backref count %u\n",
244 btrfs_shared_data_ref_count(l, sref));
245 break;
246 case BTRFS_EXTENT_DATA_KEY:
247 fi = btrfs_item_ptr(l, i,
248 struct btrfs_file_extent_item);
249 if (btrfs_file_extent_type(l, fi) ==
250 BTRFS_FILE_EXTENT_INLINE) {
251 printk(KERN_INFO "\t\tinline extent data "
252 "size %u\n",
253 btrfs_file_extent_inline_len(l, i, fi));
254 break;
255 }
256 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 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 break;
266 case BTRFS_EXTENT_REF_V0_KEY:
267#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
268 print_extent_ref_v0(l, i);
269#else
270 BUG();
271#endif
272 break;
273 case BTRFS_BLOCK_GROUP_ITEM_KEY:
274 bi = btrfs_item_ptr(l, i,
275 struct btrfs_block_group_item);
276 printk(KERN_INFO "\t\tblock group used %llu\n",
277 btrfs_disk_block_group_used(l, bi));
278 break;
279 case BTRFS_CHUNK_ITEM_KEY:
280 print_chunk(l, btrfs_item_ptr(l, i,
281 struct btrfs_chunk));
282 break;
283 case BTRFS_DEV_ITEM_KEY:
284 print_dev_item(l, btrfs_item_ptr(l, i,
285 struct btrfs_dev_item));
286 break;
287 case BTRFS_DEV_EXTENT_KEY:
288 dev_extent = btrfs_item_ptr(l, i,
289 struct btrfs_dev_extent);
290 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 break;
298 case BTRFS_DEV_STATS_KEY:
299 printk(KERN_INFO "\t\tdevice stats\n");
300 break;
301 case BTRFS_DEV_REPLACE_KEY:
302 printk(KERN_INFO "\t\tdev replace\n");
303 break;
304 case BTRFS_UUID_KEY_SUBVOL:
305 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
306 print_uuid_item(l, btrfs_item_ptr_offset(l, i),
307 btrfs_item_size_nr(l, i));
308 break;
309 };
310 }
311}
312
313void 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 if (!c)
320 return;
321 nr = btrfs_header_nritems(c);
322 level = btrfs_header_level(c);
323 if (level == 0) {
324 btrfs_print_leaf(root, c);
325 return;
326 }
327 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 for (i = 0; i < nr; i++) {
331 btrfs_node_key_to_cpu(c, &key, i);
332 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 for (i = 0; i < nr; i++) {
337 struct extent_buffer *next = read_tree_block(root,
338 btrfs_node_blockptr(c, i),
339 btrfs_node_ptr_generation(c, i));
340 if (btrfs_is_leaf(next) &&
341 level != 1)
342 BUG();
343 if (btrfs_header_level(next) !=
344 level - 1)
345 BUG();
346 btrfs_print_tree(root, next);
347 free_extent_buffer(next);
348 }
349}
350
