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btrfs-progs
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btrfs-progs/debug-tree.c

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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"
#include "version.h"
static int print_usage(void)
{
fprintf(stderr, "usage: debug-tree [ -e ] device\n");
fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
exit(1);
}
static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
{
int i;
u32 nr;
u32 size;
if (!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,
btrfs_node_ptr_generation(eb, i));
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);
}
}
static void print_old_roots(struct btrfs_super_block *super)
{
struct btrfs_root_backup *backup;
int i;
for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
backup = super->super_roots + i;
printf("btrfs root backup slot %d\n", i);
printf("\ttree root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_tree_root_gen(backup),
(unsigned long long)btrfs_backup_tree_root(backup));
printf("\t\textent root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_extent_root_gen(backup),
(unsigned long long)btrfs_backup_extent_root(backup));
printf("\t\tchunk root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_chunk_root_gen(backup),
(unsigned long long)btrfs_backup_chunk_root(backup));
printf("\t\tdevice root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_dev_root_gen(backup),
(unsigned long long)btrfs_backup_dev_root(backup));
printf("\t\tcsum root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_csum_root_gen(backup),
(unsigned long long)btrfs_backup_csum_root(backup));
printf("\t\tfs root gen %llu block %llu\n",
(unsigned long long)btrfs_backup_fs_root_gen(backup),
(unsigned long long)btrfs_backup_fs_root(backup));
printf("\t\t%llu used %llu total %llu devices\n",
(unsigned long long)btrfs_backup_bytes_used(backup),
(unsigned long long)btrfs_backup_total_bytes(backup),
(unsigned long long)btrfs_backup_num_devices(backup));
}
}
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_disk_key disk_key;
struct btrfs_key found_key;
char uuidbuf[37];
int ret;
int slot;
int extent_only = 0;
int device_only = 0;
int roots_only = 0;
int root_backups = 0;
u64 block_only = 0;
struct btrfs_root *tree_root_scan;
radix_tree_init();
while(1) {
int c;
c = getopt(ac, av, "deb:rR");
if (c < 0)
break;
switch(c) {
case 'e':
extent_only = 1;
break;
case 'd':
device_only = 1;
break;
case 'r':
roots_only = 1;
break;
case 'R':
roots_only = 1;
root_backups = 1;
break;
case 'b':
block_only = atoll(optarg);
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac != 1)
print_usage();
root = open_ctree(av[optind], 0, 0);
if (!root) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
if (block_only) {
leaf = read_tree_block(root,
block_only,
root->leafsize, 0);
if (leaf && btrfs_header_level(leaf) != 0) {
free_extent_buffer(leaf);
leaf = NULL;
}
if (!leaf) {
leaf = read_tree_block(root,
block_only,
root->nodesize, 0);
}
if (!leaf) {
fprintf(stderr, "failed to read %llu\n",
(unsigned long long)block_only);
return 0;
}
btrfs_print_tree(root, leaf, 0);
return 0;
}
if (!extent_only) {
if (roots_only) {
printf("root tree: %llu level %d\n",
(unsigned long long)root->fs_info->tree_root->node->start,
btrfs_header_level(root->fs_info->tree_root->node));
printf("chunk tree: %llu level %d\n",
(unsigned long long)root->fs_info->chunk_root->node->start,
btrfs_header_level(root->fs_info->chunk_root->node));
} else {
printf("root tree\n");
btrfs_print_tree(root->fs_info->tree_root,
root->fs_info->tree_root->node, 1);
printf("chunk tree\n");
btrfs_print_tree(root->fs_info->chunk_root,
root->fs_info->chunk_root->node, 1);
}
}
tree_root_scan = root->fs_info->tree_root;
btrfs_init_path(&path);
again:
key.offset = 0;
key.objectid = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_search_slot(NULL, tree_root_scan, &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(tree_root_scan, &path);
if (ret != 0)
break;
leaf = path.nodes[0];
slot = path.slots[0];
}
btrfs_item_key(leaf, &disk_key, path.slots[0]);
btrfs_disk_key_to_cpu(&found_key, &disk_key);
if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
unsigned long offset;
struct extent_buffer *buf;
int skip = extent_only | device_only;
offset = btrfs_item_ptr_offset(leaf, slot);
read_extent_buffer(leaf, &ri, offset, sizeof(ri));
buf = read_tree_block(tree_root_scan,
btrfs_root_bytenr(&ri),
btrfs_level_size(tree_root_scan,
btrfs_root_level(&ri)),
0);
switch(found_key.objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
if (!skip)
printf("root");
break;
case BTRFS_EXTENT_TREE_OBJECTID:
if (!device_only)
skip = 0;
if (!extent_only && !device_only)
printf("extent");
break;
case BTRFS_CHUNK_TREE_OBJECTID:
if (!skip) {
printf("chunk");
}
break;
case BTRFS_DEV_TREE_OBJECTID:
skip = 0;
printf("device");
break;
case BTRFS_FS_TREE_OBJECTID:
if (!skip) {
printf("fs");
}
break;
case BTRFS_ROOT_TREE_DIR_OBJECTID:
skip = 0;
printf("directory");
break;
case BTRFS_CSUM_TREE_OBJECTID:
if (!skip) {
printf("checksum");
}
break;
case BTRFS_ORPHAN_OBJECTID:
if (!skip) {
printf("orphan");
}
break;
case BTRFS_TREE_LOG_OBJECTID:
if (!skip) {
printf("log");
}
break;
case BTRFS_TREE_LOG_FIXUP_OBJECTID:
if (!skip) {
printf("log fixup");
}
break;
case BTRFS_TREE_RELOC_OBJECTID:
if (!skip) {
printf("reloc");
}
break;
case BTRFS_DATA_RELOC_TREE_OBJECTID:
if (!skip) {
printf("data reloc");
}
break;
case BTRFS_EXTENT_CSUM_OBJECTID:
if (!skip) {
printf("extent checksum");
}
case BTRFS_MULTIPLE_OBJECTIDS:
if (!skip) {
printf("multiple");
}
break;
default:
if (!skip) {
printf("file");
}
}
if (extent_only && !skip) {
print_extents(tree_root_scan, buf);
} else if (!skip) {
printf(" tree ");
btrfs_print_key(&disk_key);
if (roots_only) {
printf(" %llu level %d\n",
(unsigned long long)buf->start,
btrfs_header_level(buf));
} else {
printf(" \n");
btrfs_print_tree(tree_root_scan, buf, 1);
}
}
}
path.slots[0]++;
}
btrfs_release_path(root, &path);
if (tree_root_scan == root->fs_info->tree_root &&
root->fs_info->log_root_tree) {
tree_root_scan = root->fs_info->log_root_tree;
goto again;
}
if (extent_only || device_only)
return 0;
if (root_backups)
print_old_roots(&root->fs_info->super_copy);
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);
printf("%s\n", BTRFS_BUILD_VERSION);
return 0;
}
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