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/*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "transaction.h"
static int print_usage(void)
{
fprintf(stderr, "usage: debug-tree [ -e ] device\n");
exit(1);
}
static void print_extent_leaf(struct btrfs_root *root, struct extent_buffer *l)
{
int i;
struct btrfs_item *item;
struct btrfs_extent_ref *ref;
struct btrfs_key key;
static u64 last = 0;
static u64 last_len = 0;
u32 nr = btrfs_header_nritems(l);
u32 type;
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(l, i);
btrfs_item_key_to_cpu(l, &key, i);
type = btrfs_key_type(&key);
switch (type) {
case BTRFS_EXTENT_ITEM_KEY:
last_len = key.offset;
last = key.objectid;
break;
case BTRFS_EXTENT_REF_KEY:
ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
printf("%llu %llu extent back ref root %llu gen %llu "
"owner %llu offset %llu\n",
(unsigned long long)last,
(unsigned long long)last_len,
(unsigned long long)btrfs_ref_root(l, ref),
(unsigned long long)btrfs_ref_generation(l, ref),
(unsigned long long)btrfs_ref_objectid(l, ref),
(unsigned long long)btrfs_ref_offset(l, ref));
break;
};
fflush(stdout);
}
}
static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
{
int i;
u32 nr;
u32 size;
if (!eb)
return;
if (btrfs_is_leaf(eb)) {
print_extent_leaf(root, eb);
return;
}
size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
nr = btrfs_header_nritems(eb);
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(root,
btrfs_node_blockptr(eb, i),
size);
if (btrfs_is_leaf(next) &&
btrfs_header_level(eb) != 1)
BUG();
if (btrfs_header_level(next) !=
btrfs_header_level(eb) - 1)
BUG();
print_extents(root, next);
free_extent_buffer(next);
}
}
int main(int ac, char **av)
{
struct btrfs_root *root;
struct btrfs_path path;
struct btrfs_key key;
struct btrfs_root_item ri;
struct extent_buffer *leaf;
struct btrfs_key found_key;
char uuidbuf[37];
int ret;
int slot;
int extent_only = 0;
radix_tree_init();
while(1) {
int c;
c = getopt(ac, av, "e");
if (c < 0)
break;
switch(c) {
case 'e':
extent_only = 1;
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac != 1)
print_usage();
root = open_ctree(av[optind], 0);
if (!root) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
if (!extent_only) {
printf("root tree\n");
btrfs_print_tree(root->fs_info->tree_root,
root->fs_info->tree_root->node);
printf("chunk tree\n");
btrfs_print_tree(root->fs_info->chunk_root,
root->fs_info->chunk_root->node);
}
btrfs_init_path(&path);
key.offset = 0;
key.objectid = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_search_slot(NULL, root->fs_info->tree_root,
&key, &path, 0, 0);
BUG_ON(ret < 0);
while(1) {
leaf = path.nodes[0];
slot = path.slots[0];
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, &path);
if (ret != 0)
break;
leaf = path.nodes[0];
slot = path.slots[0];
}
btrfs_item_key_to_cpu(leaf, &found_key, path.slots[0]);
if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
unsigned long offset;
struct extent_buffer *buf;
int skip = extent_only;
offset = btrfs_item_ptr_offset(leaf, slot);
read_extent_buffer(leaf, &ri, offset, sizeof(ri));
buf = read_tree_block(root->fs_info->tree_root,
btrfs_root_bytenr(&ri),
root->leafsize);
switch(found_key.objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
if (!skip)
printf("root ");
break;
case BTRFS_DEV_TREE_OBJECTID:
if (!skip) {
printf("device extent tree ");
}
break;
case BTRFS_EXTENT_TREE_OBJECTID:
skip = 0;
if (!extent_only)
printf("extent tree ");
break;
}
if (!skip && !extent_only) {
printf("tree %llu %u %llu\n",
(unsigned long long)found_key.objectid,
found_key.type,
(unsigned long long)found_key.offset);
btrfs_print_tree(root, buf);
} else if (extent_only && !skip) {
print_extents(root, buf);
}
}
path.slots[0]++;
}
btrfs_release_path(root, &path);
if (extent_only)
return 0;
printf("total bytes %llu\n",
(unsigned long long)btrfs_super_total_bytes(&root->fs_info->super_copy));
printf("bytes used %llu\n",
(unsigned long long)btrfs_super_bytes_used(&root->fs_info->super_copy));
uuidbuf[36] = '\0';
uuid_unparse(root->fs_info->super_copy.fsid, uuidbuf);
printf("uuid %s\n", uuidbuf);
return 0;
}
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