Root/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
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           (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}
39static 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}
48static 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
59static 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
144static 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
158void 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        case BTRFS_BLOCK_GROUP_ITEM_KEY:
264            bi = btrfs_item_ptr(l, i,
265                        struct btrfs_block_group_item);
266            printk(KERN_INFO "\t\tblock group used %llu\n",
267                   (unsigned long long)
268                   btrfs_disk_block_group_used(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            printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
282                   "\t\tchunk objectid %llu chunk offset %llu "
283                   "length %llu\n",
284                   (unsigned long long)
285                   btrfs_dev_extent_chunk_tree(l, dev_extent),
286                   (unsigned long long)
287                   btrfs_dev_extent_chunk_objectid(l, dev_extent),
288                   (unsigned long long)
289                   btrfs_dev_extent_chunk_offset(l, dev_extent),
290                   (unsigned long long)
291                   btrfs_dev_extent_length(l, dev_extent));
292        };
293    }
294}
295
296void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
297{
298    int i; u32 nr;
299    struct btrfs_key key;
300    int level;
301
302    if (!c)
303        return;
304    nr = btrfs_header_nritems(c);
305    level = btrfs_header_level(c);
306    if (level == 0) {
307        btrfs_print_leaf(root, c);
308        return;
309    }
310    printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n",
311           (unsigned long long)btrfs_header_bytenr(c),
312          level, nr,
313           (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
314    for (i = 0; i < nr; i++) {
315        btrfs_node_key_to_cpu(c, &key, i);
316        printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
317               i,
318               (unsigned long long)key.objectid,
319               key.type,
320               (unsigned long long)key.offset,
321               (unsigned long long)btrfs_node_blockptr(c, i));
322    }
323    for (i = 0; i < nr; i++) {
324        struct extent_buffer *next = read_tree_block(root,
325                    btrfs_node_blockptr(c, i),
326                    btrfs_level_size(root, level - 1),
327                    btrfs_node_ptr_generation(c, i));
328        if (btrfs_is_leaf(next) &&
329           level != 1)
330            BUG();
331        if (btrfs_header_level(next) !=
332               level - 1)
333            BUG();
334        btrfs_print_tree(root, next);
335        free_extent_buffer(next);
336    }
337}
338

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