btrfs-progs/print-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.
*/
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#include <stdio.h>
#include <stdlib.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
static int print_dir_item(struct btrfs_item *item,
struct btrfs_dir_item *di)
{
u32 total;
u32 cur = 0;
u32 len;
total = btrfs_item_size(item);
while(cur < total) {
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printf("\t\tdir index %llu type %u\n",
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(unsigned long long)btrfs_disk_key_objectid(&di->location),
btrfs_dir_type(di));
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printf("\t\tname: %.*s\n",
btrfs_dir_name_len(di),(char *)(di + 1));
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if (btrfs_dir_data_len(di))
printf("\t\tdata: %.*s\n", btrfs_dir_data_len(di),
(char *)((char *)(di + 1) + btrfs_dir_name_len(di)));
len = sizeof(*di) + btrfs_dir_name_len(di) + btrfs_dir_data_len(di);
di = (struct btrfs_dir_item *)((char *)di + len);
cur += len;
}
return 0;
}
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void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
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{
int i;
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u32 nr = btrfs_header_nritems(&l->header);
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struct btrfs_item *item;
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struct btrfs_extent_item *ei;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
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struct btrfs_inode_item *ii;
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struct btrfs_file_extent_item *fi;
struct btrfs_csum_item *ci;
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struct btrfs_block_group_item *bi;
struct btrfs_extent_ref *ref;
u32 type;
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printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
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(unsigned long long)btrfs_header_bytenr(&l->header), nr,
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btrfs_leaf_free_space(root, l),
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(unsigned long long)btrfs_header_generation(&l->header),
(unsigned long long)btrfs_header_owner(&l->header));
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fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = l->items + i;
type = btrfs_disk_key_type(&item->key);
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printf("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n",
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i,
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(unsigned long long)btrfs_disk_key_objectid(&item->key),
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btrfs_disk_key_type(&item->key),
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(unsigned long long)btrfs_disk_key_offset(&item->key),
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btrfs_item_offset(item),
btrfs_item_size(item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
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ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
printf("\t\tinode generation %llu size %llu block group %llu mode %o links %u\n",
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(unsigned long long)btrfs_inode_generation(ii),
(unsigned long long)btrfs_inode_size(ii),
(unsigned long long)btrfs_inode_block_group(ii),
btrfs_inode_mode(ii),
btrfs_inode_nlink(ii));
break;
case BTRFS_DIR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
break;
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case BTRFS_XATTR_ITEM_KEY:
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case BTRFS_DIR_INDEX_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
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break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
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printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
(unsigned long long)btrfs_root_bytenr(ri),
ri->level,
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(unsigned long long)btrfs_root_dirid(ri),
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btrfs_root_refs(ri));
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if (1 || btrfs_root_refs(ri) == 0) {
struct btrfs_key drop_key;
btrfs_disk_key_to_cpu(&drop_key,
&ri->drop_progress);
printf("\t\tdrop key %Lu %x %Lu level %d\n",
(unsigned long long)drop_key.objectid,
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drop_key.type,
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(unsigned long long)drop_key.offset,
ri->drop_level);
}
break;
case BTRFS_EXTENT_ITEM_KEY:
ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
printf("\t\textent data refs %u\n",
btrfs_extent_refs(ei));
break;
case BTRFS_EXTENT_REF_KEY:
ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
printf("\t\textent back ref root %llu gen %llu "
"owner %llu offset %llu\n",
(unsigned long long)btrfs_ref_root(ref),
(unsigned long long)btrfs_ref_generation(ref),
(unsigned long long)btrfs_ref_objectid(ref),
(unsigned long long)btrfs_ref_offset(ref));
break;
case BTRFS_CSUM_ITEM_KEY:
ci = btrfs_item_ptr(l, i,
struct btrfs_csum_item);
printf("\t\tcsum item\n");
break;
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case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(fi) ==
BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u\n",
btrfs_file_extent_inline_len(l->items + i));
break;
}
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printf("\t\textent data disk byte %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_disk_bytenr(fi),
(unsigned long long)btrfs_file_extent_disk_num_bytes(fi));
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printf("\t\textent data offset %llu nr %llu\n",
(unsigned long long)btrfs_file_extent_offset(fi),
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(unsigned long long)btrfs_file_extent_num_bytes(fi));
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break;
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case BTRFS_BLOCK_GROUP_ITEM_KEY:
bi = btrfs_item_ptr(l, i,
struct btrfs_block_group_item);
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printf("\t\tblock group used %llu flags %x\n",
(unsigned long long)btrfs_block_group_used(bi),
bi->flags);
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break;
case BTRFS_STRING_ITEM_KEY:
printf("\t\titem data %.*s\n", btrfs_item_size(item),
btrfs_leaf_data(l) + btrfs_item_offset(item));
break;
};
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fflush(stdout);
}
}
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void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
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{
int i;
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u32 nr;
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struct btrfs_node *c;
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u32 size;
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if (!t)
return;
c = &t->node;
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nr = btrfs_header_nritems(&c->header);
if (btrfs_is_leaf(c)) {
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btrfs_print_leaf(root, (struct btrfs_leaf *)c);
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return;
}
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printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
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(unsigned long long)t->bytenr,
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btrfs_header_level(&c->header), nr,
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(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
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(unsigned long long)btrfs_header_generation(&c->header),
(unsigned long long)btrfs_header_owner(&c->header));
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fflush(stdout);
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size = btrfs_level_size(root, btrfs_header_level(&c->header) - 1);
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for (i = 0; i < nr; i++) {
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u64 blocknr = btrfs_node_blockptr(c, i);
printf("\tkey %d (%llu %x %llu) block %llu (%llu) gen %llu\n",
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i,
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(unsigned long long)c->ptrs[i].key.objectid,
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c->ptrs[i].key.type,
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(unsigned long long)c->ptrs[i].key.offset,
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(unsigned long long)blocknr,
(unsigned long long)blocknr / size,
(unsigned long long)btrfs_node_ptr_generation(c, i));
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fflush(stdout);
}
for (i = 0; i < nr; i++) {
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struct btrfs_buffer *next_buf = read_tree_block(root,
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btrfs_node_blockptr(c, i),
size);
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struct btrfs_node *next = &next_buf->node;
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if (btrfs_is_leaf(next) &&
btrfs_header_level(&c->header) != 1)
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BUG();
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if (btrfs_header_level(&next->header) !=
btrfs_header_level(&c->header) - 1)
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BUG();
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btrfs_print_tree(root, next_buf);
btrfs_block_release(root, next_buf);
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}
}