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