fs: add missing prefetch.h include
[linux-2.6.git] / fs / btrfs / print-tree.c
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 static 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 }
39 static 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 }
48 static 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
59 static 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
144 static 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
158 void 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
297 void 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 }