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TOMOYO Linux Cross Reference
Linux/fs/btrfs/print-tree.c

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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 
 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, nr;
162         struct btrfs_item *item;
163         struct btrfs_root_item *ri;
164         struct btrfs_dir_item *di;
165         struct btrfs_inode_item *ii;
166         struct btrfs_block_group_item *bi;
167         struct btrfs_file_extent_item *fi;
168         struct btrfs_extent_data_ref *dref;
169         struct btrfs_shared_data_ref *sref;
170         struct btrfs_dev_extent *dev_extent;
171         struct btrfs_key key;
172         struct btrfs_key found_key;
173 
174         if (!l)
175                 return;
176 
177         nr = btrfs_header_nritems(l);
178 
179         printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n",
180                 (unsigned long long)btrfs_header_bytenr(l), nr,
181                 btrfs_leaf_free_space(root, l));
182         for (i = 0 ; i < nr ; i++) {
183                 item = btrfs_item_nr(l, i);
184                 btrfs_item_key_to_cpu(l, &key, i);
185                 type = btrfs_key_type(&key);
186                 printk(KERN_INFO "\titem %d key (%llu %x %llu) itemoff %d "
187                        "itemsize %d\n",
188                         i,
189                         (unsigned long long)key.objectid, type,
190                         (unsigned long long)key.offset,
191                         btrfs_item_offset(l, item), btrfs_item_size(l, item));
192                 switch (type) {
193                 case BTRFS_INODE_ITEM_KEY:
194                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
195                         printk(KERN_INFO "\t\tinode generation %llu size %llu "
196                                "mode %o\n",
197                                (unsigned long long)
198                                btrfs_inode_generation(l, ii),
199                               (unsigned long long)btrfs_inode_size(l, ii),
200                                btrfs_inode_mode(l, ii));
201                         break;
202                 case BTRFS_DIR_ITEM_KEY:
203                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
204                         btrfs_dir_item_key_to_cpu(l, di, &found_key);
205                         printk(KERN_INFO "\t\tdir oid %llu type %u\n",
206                                 (unsigned long long)found_key.objectid,
207                                 btrfs_dir_type(l, di));
208                         break;
209                 case BTRFS_ROOT_ITEM_KEY:
210                         ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
211                         printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
212                                 (unsigned long long)
213                                 btrfs_disk_root_bytenr(l, ri),
214                                 btrfs_disk_root_refs(l, ri));
215                         break;
216                 case BTRFS_EXTENT_ITEM_KEY:
217                         print_extent_item(l, i);
218                         break;
219                 case BTRFS_TREE_BLOCK_REF_KEY:
220                         printk(KERN_INFO "\t\ttree block backref\n");
221                         break;
222                 case BTRFS_SHARED_BLOCK_REF_KEY:
223                         printk(KERN_INFO "\t\tshared block backref\n");
224                         break;
225                 case BTRFS_EXTENT_DATA_REF_KEY:
226                         dref = btrfs_item_ptr(l, i,
227                                               struct btrfs_extent_data_ref);
228                         print_extent_data_ref(l, dref);
229                         break;
230                 case BTRFS_SHARED_DATA_REF_KEY:
231                         sref = btrfs_item_ptr(l, i,
232                                               struct btrfs_shared_data_ref);
233                         printk(KERN_INFO "\t\tshared data backref count %u\n",
234                                btrfs_shared_data_ref_count(l, sref));
235                         break;
236                 case BTRFS_EXTENT_DATA_KEY:
237                         fi = btrfs_item_ptr(l, i,
238                                             struct btrfs_file_extent_item);
239                         if (btrfs_file_extent_type(l, fi) ==
240                             BTRFS_FILE_EXTENT_INLINE) {
241                                 printk(KERN_INFO "\t\tinline extent data "
242                                        "size %u\n",
243                                        btrfs_file_extent_inline_len(l, fi));
244                                 break;
245                         }
246                         printk(KERN_INFO "\t\textent data disk bytenr %llu "
247                                "nr %llu\n",
248                                (unsigned long long)
249                                btrfs_file_extent_disk_bytenr(l, fi),
250                                (unsigned long long)
251                                btrfs_file_extent_disk_num_bytes(l, fi));
252                         printk(KERN_INFO "\t\textent data offset %llu "
253                                "nr %llu ram %llu\n",
254                                (unsigned long long)
255                                btrfs_file_extent_offset(l, fi),
256                                (unsigned long long)
257                                btrfs_file_extent_num_bytes(l, fi),
258                                (unsigned long long)
259                                btrfs_file_extent_ram_bytes(l, fi));
260                         break;
261                 case BTRFS_EXTENT_REF_V0_KEY:
262 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
263                         print_extent_ref_v0(l, i);
264 #else
265                         BUG();
266 #endif
267                         break;
268                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
269                         bi = btrfs_item_ptr(l, i,
270                                             struct btrfs_block_group_item);
271                         printk(KERN_INFO "\t\tblock group used %llu\n",
272                                (unsigned long long)
273                                btrfs_disk_block_group_used(l, bi));
274                         break;
275                 case BTRFS_CHUNK_ITEM_KEY:
276                         print_chunk(l, btrfs_item_ptr(l, i,
277                                                       struct btrfs_chunk));
278                         break;
279                 case BTRFS_DEV_ITEM_KEY:
280                         print_dev_item(l, btrfs_item_ptr(l, i,
281                                         struct btrfs_dev_item));
282                         break;
283                 case BTRFS_DEV_EXTENT_KEY:
284                         dev_extent = btrfs_item_ptr(l, i,
285                                                     struct btrfs_dev_extent);
286                         printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
287                                "\t\tchunk objectid %llu chunk offset %llu "
288                                "length %llu\n",
289                                (unsigned long long)
290                                btrfs_dev_extent_chunk_tree(l, dev_extent),
291                                (unsigned long long)
292                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
293                                (unsigned long long)
294                                btrfs_dev_extent_chunk_offset(l, dev_extent),
295                                (unsigned long long)
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                 };
305         }
306 }
307 
308 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
309 {
310         int i; u32 nr;
311         struct btrfs_key key;
312         int level;
313 
314         if (!c)
315                 return;
316         nr = btrfs_header_nritems(c);
317         level = btrfs_header_level(c);
318         if (level == 0) {
319                 btrfs_print_leaf(root, c);
320                 return;
321         }
322         printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n",
323                (unsigned long long)btrfs_header_bytenr(c),
324               level, nr,
325                (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
326         for (i = 0; i < nr; i++) {
327                 btrfs_node_key_to_cpu(c, &key, i);
328                 printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
329                        i,
330                        (unsigned long long)key.objectid,
331                        key.type,
332                        (unsigned long long)key.offset,
333                        (unsigned long long)btrfs_node_blockptr(c, i));
334         }
335         for (i = 0; i < nr; i++) {
336                 struct extent_buffer *next = read_tree_block(root,
337                                         btrfs_node_blockptr(c, i),
338                                         btrfs_level_size(root, level - 1),
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 

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