329 lines
11 KiB
C
329 lines
11 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <uuid/uuid.h>
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#include "kerncompat.h"
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#include "radix-tree.h"
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#include "ctree.h"
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#include "disk-io.h"
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static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
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struct btrfs_dir_item *di)
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{
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u32 total;
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u32 cur = 0;
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u32 len;
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u32 name_len;
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u32 data_len;
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char namebuf[BTRFS_NAME_LEN];
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struct btrfs_disk_key location;
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total = btrfs_item_size(eb, item);
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while(cur < total) {
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btrfs_dir_item_key(eb, di, &location);
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printf("\t\tdir index %llu type %u\n",
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(unsigned long long)btrfs_disk_key_objectid(&location),
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btrfs_dir_type(eb, di));
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name_len = btrfs_dir_name_len(eb, di);
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data_len = btrfs_dir_data_len(eb, di);
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len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
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read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
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printf("\t\tnamelen %u datalen %u name: %.*s\n",
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name_len, data_len, len, namebuf);
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len = sizeof(*di) + name_len + data_len;
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di = (struct btrfs_dir_item *)((char *)di + len);
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cur += len;
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}
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return 0;
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}
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static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
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struct btrfs_inode_ref *ref)
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{
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u32 total;
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u32 cur = 0;
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u32 len;
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u32 name_len;
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char namebuf[BTRFS_NAME_LEN];
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total = btrfs_item_size(eb, item);
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while(cur < total) {
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name_len = btrfs_inode_ref_name_len(eb, ref);
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len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
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read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
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printf("\t\tinode ref namelen %u name: %.*s\n",
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name_len, len, namebuf);
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len = sizeof(*ref) + name_len;
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ref = (struct btrfs_inode_ref *)((char *)ref + len);
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cur += len;
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}
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return 0;
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}
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static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
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{
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int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
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int i;
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printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
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(unsigned long long)btrfs_chunk_length(eb, chunk),
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(unsigned long long)btrfs_chunk_owner(eb, chunk),
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(unsigned long long)btrfs_chunk_type(eb, chunk),
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num_stripes);
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for (i = 0 ; i < num_stripes ; i++) {
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printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
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(unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
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(unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
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}
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}
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static void print_dev_item(struct extent_buffer *eb,
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struct btrfs_dev_item *dev_item)
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{
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printf("\t\tdev item devid %llu "
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"total_bytes %llu bytes used %Lu\n",
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(unsigned long long)btrfs_device_id(eb, dev_item),
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(unsigned long long)btrfs_device_total_bytes(eb, dev_item),
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(unsigned long long)btrfs_device_bytes_used(eb, dev_item));
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}
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static void print_uuids(struct extent_buffer *eb)
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{
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char fs_uuid[37];
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char chunk_uuid[37];
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u8 disk_uuid[BTRFS_UUID_SIZE];
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read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
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BTRFS_FSID_SIZE);
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fs_uuid[36] = '\0';
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uuid_unparse(disk_uuid, fs_uuid);
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read_extent_buffer(eb, disk_uuid,
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(unsigned long)btrfs_header_chunk_tree_uuid(eb),
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BTRFS_UUID_SIZE);
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chunk_uuid[36] = '\0';
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uuid_unparse(disk_uuid, chunk_uuid);
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printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
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}
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void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
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{
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int i;
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char *str;
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struct btrfs_item *item;
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struct btrfs_extent_item *ei;
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struct btrfs_root_item *ri;
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struct btrfs_dir_item *di;
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struct btrfs_inode_item *ii;
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struct btrfs_file_extent_item *fi;
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struct btrfs_csum_item *ci;
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struct btrfs_block_group_item *bi;
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struct btrfs_extent_ref *ref;
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struct btrfs_inode_ref *iref;
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struct btrfs_dev_extent *dev_extent;
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struct btrfs_disk_key disk_key;
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struct btrfs_root_item root_item;
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struct btrfs_block_group_item bg_item;
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u32 nr = btrfs_header_nritems(l);
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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), nr,
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btrfs_leaf_free_space(root, l),
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(unsigned long long)btrfs_header_generation(l),
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(unsigned long long)btrfs_header_owner(l));
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print_uuids(l);
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fflush(stdout);
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for (i = 0 ; i < nr ; i++) {
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item = btrfs_item_nr(l, i);
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btrfs_item_key(l, &disk_key, i);
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type = btrfs_disk_key_type(&disk_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(&disk_key),
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btrfs_disk_key_type(&disk_key),
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(unsigned long long)btrfs_disk_key_offset(&disk_key),
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btrfs_item_offset(l, item),
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btrfs_item_size(l, item));
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switch (type) {
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case BTRFS_INODE_ITEM_KEY:
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ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
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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(l, ii),
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(unsigned long long)btrfs_inode_size(l, ii),
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(unsigned long long)btrfs_inode_block_group(l,ii),
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btrfs_inode_mode(l, ii),
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btrfs_inode_nlink(l, ii));
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break;
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case BTRFS_INODE_REF_KEY:
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iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
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print_inode_ref_item(l, item, iref);
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break;
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case BTRFS_DIR_ITEM_KEY:
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case BTRFS_DIR_INDEX_KEY:
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case BTRFS_XATTR_ITEM_KEY:
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di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
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print_dir_item(l, item, di);
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break;
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case BTRFS_ROOT_ITEM_KEY:
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ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
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read_extent_buffer(l, &root_item, (unsigned long)ri, sizeof(root_item));
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printf("\t\troot data bytenr %llu level %d dirid %llu refs %u\n",
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(unsigned long long)btrfs_root_bytenr(&root_item),
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btrfs_root_level(&root_item),
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(unsigned long long)btrfs_root_dirid(&root_item),
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btrfs_root_refs(&root_item));
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if (1 || btrfs_root_refs(&root_item) == 0) {
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struct btrfs_key drop_key;
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btrfs_disk_key_to_cpu(&drop_key,
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&root_item.drop_progress);
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printf("\t\tdrop key %Lu %x %Lu level %d\n",
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(unsigned long long)drop_key.objectid,
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drop_key.type,
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(unsigned long long)drop_key.offset,
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root_item.drop_level);
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}
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break;
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case BTRFS_EXTENT_ITEM_KEY:
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ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
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printf("\t\textent data refs %u\n",
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btrfs_extent_refs(l, ei));
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break;
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case BTRFS_EXTENT_REF_KEY:
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ref = btrfs_item_ptr(l, i, struct btrfs_extent_ref);
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printf("\t\textent back ref root %llu gen %llu "
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"owner %llu offset %llu\n",
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(unsigned long long)btrfs_ref_root(l, ref),
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(unsigned long long)btrfs_ref_generation(l, ref),
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(unsigned long long)btrfs_ref_objectid(l, ref),
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(unsigned long long)btrfs_ref_offset(l, ref));
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break;
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case BTRFS_CSUM_ITEM_KEY:
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ci = btrfs_item_ptr(l, i, struct btrfs_csum_item);
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printf("\t\tcsum item\n");
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break;
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case BTRFS_EXTENT_DATA_KEY:
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fi = btrfs_item_ptr(l, i,
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struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(l, fi) ==
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BTRFS_FILE_EXTENT_INLINE) {
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printf("\t\tinline extent data size %u\n",
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btrfs_file_extent_inline_len(l, item));
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break;
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}
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printf("\t\textent data disk byte %llu nr %llu\n",
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(unsigned long long)btrfs_file_extent_disk_bytenr(l, fi),
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(unsigned long long)btrfs_file_extent_disk_num_bytes(l, fi));
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printf("\t\textent data offset %llu nr %llu\n",
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(unsigned long long)btrfs_file_extent_offset(l, fi),
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(unsigned long long)btrfs_file_extent_num_bytes(l, fi));
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break;
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case BTRFS_BLOCK_GROUP_ITEM_KEY:
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bi = btrfs_item_ptr(l, i,
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struct btrfs_block_group_item);
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read_extent_buffer(l, &bg_item, (unsigned long)bi,
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sizeof(bg_item));
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printf("\t\tblock group used %llu flags %llu\n",
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(unsigned long long)btrfs_block_group_used(&bg_item),
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(unsigned long long)btrfs_block_group_flags(&bg_item));
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break;
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case BTRFS_CHUNK_ITEM_KEY:
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print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
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break;
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case BTRFS_DEV_ITEM_KEY:
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print_dev_item(l, btrfs_item_ptr(l, i,
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struct btrfs_dev_item));
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break;
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case BTRFS_DEV_EXTENT_KEY:
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dev_extent = btrfs_item_ptr(l, i,
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struct btrfs_dev_extent);
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printf("\t\tdev extent chunk_tree %llu\n"
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"\t\tchunk objectid %llu chunk offset %llu "
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"length %llu\n",
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(unsigned long long)
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btrfs_dev_extent_chunk_tree(l, dev_extent),
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(unsigned long long)
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btrfs_dev_extent_chunk_objectid(l, dev_extent),
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(unsigned long long)
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btrfs_dev_extent_chunk_offset(l, dev_extent),
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(unsigned long long)
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btrfs_dev_extent_length(l, dev_extent));
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break;
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case BTRFS_STRING_ITEM_KEY:
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/* dirty, but it's simple */
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str = l->data + btrfs_item_ptr_offset(l, i);
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printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
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break;
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};
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fflush(stdout);
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}
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}
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void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb)
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{
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int i;
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u32 nr;
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u32 size;
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struct btrfs_key key;
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if (!eb)
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return;
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nr = btrfs_header_nritems(eb);
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if (btrfs_is_leaf(eb)) {
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btrfs_print_leaf(root, eb);
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return;
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}
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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)eb->start,
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btrfs_header_level(eb), nr,
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(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
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(unsigned long long)btrfs_header_generation(eb),
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(unsigned long long)btrfs_header_owner(eb));
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print_uuids(eb);
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fflush(stdout);
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size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
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for (i = 0; i < nr; i++) {
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u64 blocknr = btrfs_node_blockptr(eb, i);
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btrfs_node_key_to_cpu(eb, &key, i);
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printf("\tkey %d (%llu %x %llu) block %llu (%llu) gen %llu\n",
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i,
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(unsigned long long)key.objectid,
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key.type,
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(unsigned long long)key.offset,
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(unsigned long long)blocknr,
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(unsigned long long)blocknr / size,
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(unsigned long long)btrfs_node_ptr_generation(eb, i));
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fflush(stdout);
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}
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for (i = 0; i < nr; i++) {
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struct extent_buffer *next = read_tree_block(root,
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btrfs_node_blockptr(eb, i),
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size);
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if (btrfs_is_leaf(next) &&
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btrfs_header_level(eb) != 1)
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BUG();
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if (btrfs_header_level(next) !=
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btrfs_header_level(eb) - 1)
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BUG();
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btrfs_print_tree(root, next);
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free_extent_buffer(next);
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}
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}
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