btrfs: Remove V0 extent support
[sfrench/cifs-2.6.git] / fs / btrfs / print-tree.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2007 Oracle.  All rights reserved.
4  */
5
6 #include "ctree.h"
7 #include "disk-io.h"
8 #include "print-tree.h"
9
10 static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
11 {
12         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
13         int i;
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));
21         }
22 }
23 static void print_dev_item(struct extent_buffer *eb,
24                            struct btrfs_dev_item *dev_item)
25 {
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));
30 }
31 static void print_extent_data_ref(struct extent_buffer *eb,
32                                   struct btrfs_extent_data_ref *ref)
33 {
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));
39 }
40
41 static void print_extent_item(struct extent_buffer *eb, int slot, int type)
42 {
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;
48         unsigned long end;
49         unsigned long ptr;
50         u32 item_size = btrfs_item_size_nr(eb, slot);
51         u64 flags;
52         u64 offset;
53         int ref_index = 0;
54
55         if (item_size < sizeof(*ei))
56                 BUG();
57
58         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
59         flags = btrfs_extent_flags(eb, ei);
60
61         pr_info("\t\textent refs %llu gen %llu flags %llu\n",
62                btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
63                flags);
64
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);
75         } else {
76                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
77         }
78
79         ptr = (unsigned long)iref;
80         end = (unsigned long)ei + item_size;
81         while (ptr < end) {
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++);
86                 switch (type) {
87                 case BTRFS_TREE_BLOCK_REF_KEY:
88                         pr_cont("tree block backref root %llu\n", offset);
89                         break;
90                 case BTRFS_SHARED_BLOCK_REF_KEY:
91                         pr_cont("shared block backref parent %llu\n", offset);
92                         /*
93                          * offset is supposed to be a tree block which
94                          * must be aligned to nodesize.
95                          */
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);
99                         break;
100                 case BTRFS_EXTENT_DATA_REF_KEY:
101                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
102                         print_extent_data_ref(eb, dref);
103                         break;
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));
108                         /*
109                          * offset is supposed to be a tree block which
110                          * must be aligned to nodesize.
111                          */
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);
115                         break;
116                 default:
117                         pr_cont("(extent %llu has INVALID ref type %d)\n",
118                                   eb->start, type);
119                         return;
120                 }
121                 ptr += btrfs_extent_inline_ref_size(type);
122         }
123         WARN_ON(ptr > end);
124 }
125
126 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
127                             u32 item_size)
128 {
129         if (!IS_ALIGNED(item_size, sizeof(u64))) {
130                 pr_warn("BTRFS: uuid item with illegal size %lu!\n",
131                         (unsigned long)item_size);
132                 return;
133         }
134         while (item_size) {
135                 __le64 subvol_id;
136
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);
142         }
143 }
144
145 /*
146  * Helper to output refs and locking status of extent buffer.  Useful to debug
147  * race condition related problems.
148  */
149 static void print_eb_refs_lock(struct extent_buffer *eb)
150 {
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);
161 #endif
162 }
163
164 void btrfs_print_leaf(struct extent_buffer *l)
165 {
166         struct btrfs_fs_info *fs_info;
167         int i;
168         u32 type, nr;
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;
180
181         if (!l)
182                 return;
183
184         fs_info = l->fs_info;
185         nr = btrfs_header_nritems(l);
186
187         btrfs_info(fs_info,
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);
195                 type = key.type;
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));
199                 switch (type) {
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));
206                         break;
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",
211                                 found_key.objectid,
212                                 btrfs_dir_type(l, di));
213                         break;
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));
219                         break;
220                 case BTRFS_EXTENT_ITEM_KEY:
221                 case BTRFS_METADATA_ITEM_KEY:
222                         print_extent_item(l, i, type);
223                         break;
224                 case BTRFS_TREE_BLOCK_REF_KEY:
225                         pr_info("\t\ttree block backref\n");
226                         break;
227                 case BTRFS_SHARED_BLOCK_REF_KEY:
228                         pr_info("\t\tshared block backref\n");
229                         break;
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);
234                         break;
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));
240                         break;
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));
248                                 break;
249                         }
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));
257                         break;
258                 case BTRFS_EXTENT_REF_V0_KEY:
259                         BUG();
260                         break;
261                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
262                         bi = btrfs_item_ptr(l, i,
263                                             struct btrfs_block_group_item);
264                         pr_info(
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));
269                         break;
270                 case BTRFS_CHUNK_ITEM_KEY:
271                         print_chunk(l, btrfs_item_ptr(l, i,
272                                                       struct btrfs_chunk));
273                         break;
274                 case BTRFS_DEV_ITEM_KEY:
275                         print_dev_item(l, btrfs_item_ptr(l, i,
276                                         struct btrfs_dev_item));
277                         break;
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));
286                         break;
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");
293                                 break;
294                         default:
295                                 pr_info("\t\tunknown persistent item\n");
296                         }
297                         break;
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");
304                                 break;
305                         default:
306                                 pr_info("\t\tunknown temporary item\n");
307                         }
308                         break;
309                 case BTRFS_DEV_REPLACE_KEY:
310                         pr_info("\t\tdev replace\n");
311                         break;
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));
316                         break;
317                 };
318         }
319 }
320
321 void btrfs_print_tree(struct extent_buffer *c, bool follow)
322 {
323         struct btrfs_fs_info *fs_info;
324         int i; u32 nr;
325         struct btrfs_key key;
326         int level;
327
328         if (!c)
329                 return;
330         fs_info = c->fs_info;
331         nr = btrfs_header_nritems(c);
332         level = btrfs_header_level(c);
333         if (level == 0) {
334                 btrfs_print_leaf(c);
335                 return;
336         }
337         btrfs_info(fs_info,
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));
349         }
350         if (!follow)
351                 return;
352         for (i = 0; i < nr; i++) {
353                 struct btrfs_key first_key;
354                 struct extent_buffer *next;
355
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);
360                 if (IS_ERR(next)) {
361                         continue;
362                 } else if (!extent_buffer_uptodate(next)) {
363                         free_extent_buffer(next);
364                         continue;
365                 }
366
367                 if (btrfs_is_leaf(next) &&
368                    level != 1)
369                         BUG();
370                 if (btrfs_header_level(next) !=
371                        level - 1)
372                         BUG();
373                 btrfs_print_tree(next, follow);
374                 free_extent_buffer(next);
375         }
376 }