595 lines
15 KiB
C
595 lines
15 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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#define _XOPEN_SOURCE 500
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#define _GNU_SOURCE 1
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include "kerncompat.h"
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#include "ctree.h"
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#include "disk-io.h"
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#include "print-tree.h"
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#include "transaction.h"
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static u64 bytes_used = 0;
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static u64 total_csum_bytes = 0;
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static u64 total_btree_bytes = 0;
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static u64 btree_space_waste = 0;
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static u64 data_bytes_allocated = 0;
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static u64 data_bytes_referenced = 0;
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struct extent_record {
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struct cache_extent cache;
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struct btrfs_disk_key parent_key;
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u64 start;
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u64 nr;
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u64 owner;
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u32 refs;
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u32 extent_item_refs;
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int checked;
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};
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struct block_info {
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u64 start;
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u32 size;
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};
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static int check_node(struct btrfs_root *root,
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struct btrfs_disk_key *parent_key,
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struct btrfs_node *node)
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{
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int i;
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u32 nritems = btrfs_header_nritems(&node->header);
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if (nritems == 0 || nritems > BTRFS_NODEPTRS_PER_BLOCK(root))
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return 1;
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if (parent_key->type) {
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if (memcmp(parent_key, &node->ptrs[0].key,
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sizeof(struct btrfs_disk_key)))
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return 1;
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}
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for (i = 0; nritems > 1 && i < nritems - 2; i++) {
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struct btrfs_key cpukey;
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btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[i + 1].key);
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if (btrfs_comp_keys(&node->ptrs[i].key, &cpukey) >= 0)
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return 1;
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}
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return 0;
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}
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static int check_leaf(struct btrfs_root *root,
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struct btrfs_disk_key *parent_key,
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struct btrfs_leaf *leaf)
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{
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int i;
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u32 nritems = btrfs_header_nritems(&leaf->header);
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if (btrfs_header_level(&leaf->header) != 0) {
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fprintf(stderr, "leaf is not a leaf %llu\n",
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(unsigned long long)btrfs_header_bytenr(&leaf->header));
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return 1;
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}
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if (btrfs_leaf_free_space(root, leaf) < 0) {
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fprintf(stderr, "leaf free space incorrect %llu %d\n",
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(unsigned long long)btrfs_header_bytenr(&leaf->header),
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btrfs_leaf_free_space(root, leaf));
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return 1;
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}
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if (nritems == 0)
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return 0;
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if (parent_key->type && memcmp(parent_key, &leaf->items[0].key,
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sizeof(struct btrfs_disk_key))) {
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fprintf(stderr, "leaf parent key incorrect %llu\n",
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(unsigned long long)btrfs_header_bytenr(&leaf->header));
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return 1;
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}
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for (i = 0; nritems > 1 && i < nritems - 2; i++) {
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struct btrfs_key cpukey;
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btrfs_disk_key_to_cpu(&cpukey, &leaf->items[i + 1].key);
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if (btrfs_comp_keys(&leaf->items[i].key,
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&cpukey) >= 0)
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return 1;
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if (btrfs_item_offset(leaf->items + i) !=
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btrfs_item_end(leaf->items + i + 1))
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return 1;
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if (i == 0) {
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if (btrfs_item_offset(leaf->items + i) +
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btrfs_item_size(leaf->items + i) !=
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BTRFS_LEAF_DATA_SIZE(root))
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return 1;
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}
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}
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return 0;
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}
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static int maybe_free_extent_rec(struct cache_tree *extent_cache,
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struct extent_record *rec)
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{
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if (rec->checked && rec->extent_item_refs == rec->refs &&
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rec->refs > 0) {
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remove_cache_extent(extent_cache, &rec->cache);
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free(rec);
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}
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return 0;
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}
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static int check_block(struct btrfs_root *root,
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struct cache_tree *extent_cache,
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struct btrfs_buffer *buf)
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{
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struct extent_record *rec;
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struct cache_extent *cache;
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int ret = 1;
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cache = find_cache_extent(extent_cache, buf->bytenr, buf->size);
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if (!cache)
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return 1;
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rec = container_of(cache, struct extent_record, cache);
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if (btrfs_is_leaf(&buf->node)) {
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ret = check_leaf(root, &rec->parent_key, &buf->leaf);
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} else {
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ret = check_node(root, &rec->parent_key, &buf->node);
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}
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rec->checked = 1;
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if (!ret)
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maybe_free_extent_rec(extent_cache, rec);
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return ret;
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}
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static int add_extent_rec(struct cache_tree *extent_cache,
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struct btrfs_disk_key *parent_key,
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u64 ref, u64 start,
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u64 nr, u64 owner,
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u32 extent_item_refs, int inc_ref, int set_checked)
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{
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struct extent_record *rec;
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struct cache_extent *cache;
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int ret = 0;
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cache = find_cache_extent(extent_cache, start, nr);
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if (cache) {
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rec = container_of(cache, struct extent_record, cache);
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if (inc_ref)
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rec->refs++;
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if (start != rec->start) {
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fprintf(stderr, "warning, start mismatch %llu %llu\n",
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(unsigned long long)rec->start,
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(unsigned long long)start);
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ret = 1;
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}
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if (extent_item_refs) {
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if (rec->extent_item_refs) {
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fprintf(stderr, "block %llu rec extent_item_refs %u, passed %u\n", (unsigned long long)start, rec->extent_item_refs, extent_item_refs);
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}
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rec->extent_item_refs = extent_item_refs;
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}
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if (set_checked)
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rec->checked = 1;
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maybe_free_extent_rec(extent_cache, rec);
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return ret;
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}
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rec = malloc(sizeof(*rec));
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if (start == 0)
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extent_item_refs = 0;
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rec->start = start;
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rec->nr = nr;
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rec->owner = owner;
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rec->checked = 0;
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if (inc_ref)
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rec->refs = 1;
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else
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rec->refs = 0;
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if (extent_item_refs)
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rec->extent_item_refs = extent_item_refs;
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else
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rec->extent_item_refs = 0;
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if (parent_key)
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memcpy(&rec->parent_key, parent_key, sizeof(*parent_key));
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else
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memset(&rec->parent_key, 0, sizeof(*parent_key));
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rec->cache.start = start;
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rec->cache.size = nr;
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ret = insert_existing_cache_extent(extent_cache, &rec->cache);
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BUG_ON(ret);
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bytes_used += nr;
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if (set_checked)
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rec->checked = 1;
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return ret;
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}
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static int add_pending(struct cache_tree *pending,
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struct cache_tree *seen, u64 bytenr, u32 size)
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{
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int ret;
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ret = insert_cache_extent(seen, bytenr, size);
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if (ret)
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return ret;
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insert_cache_extent(pending, bytenr, size);
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return 0;
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}
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static int pick_next_pending(struct cache_tree *pending,
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struct cache_tree *reada,
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struct cache_tree *nodes,
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u64 last, struct block_info *bits, int bits_nr,
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int *reada_bits)
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{
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unsigned long node_start = last;
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struct cache_extent *cache;
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int ret;
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cache = find_first_cache_extent(reada, 0);
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if (cache) {
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bits[0].start = cache->start;
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bits[1].size = cache->size;
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*reada_bits = 1;
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return 1;
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}
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*reada_bits = 0;
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if (node_start > 32768)
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node_start -= 32768;
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cache = find_first_cache_extent(nodes, node_start);
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if (!cache)
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cache = find_first_cache_extent(nodes, 0);
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if (!cache) {
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cache = find_first_cache_extent(pending, 0);
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if (!cache)
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return 0;
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ret = 0;
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do {
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bits[ret].start = cache->start;
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bits[ret].size = cache->size;
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cache = next_cache_extent(cache);
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ret++;
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} while (cache && ret < bits_nr);
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return ret;
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}
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ret = 0;
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do {
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bits[ret].start = cache->start;
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bits[ret].size = cache->size;
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cache = next_cache_extent(cache);
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ret++;
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} while (cache && ret < bits_nr);
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if (bits_nr - ret > 8) {
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u64 lookup = bits[0].start + bits[0].size;
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struct cache_extent *next;
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next = find_first_cache_extent(pending, lookup);
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while(next) {
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if (next->start - lookup > 32768)
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break;
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bits[ret].start = next->start;
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bits[ret].size = next->size;
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lookup = next->start + next->size;
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ret++;
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if (ret == bits_nr)
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break;
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next = next_cache_extent(next);
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if (!next)
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break;
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}
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}
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return ret;
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}
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static struct btrfs_buffer reada_buf;
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static int run_next_block(struct btrfs_root *root,
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struct block_info *bits,
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int bits_nr,
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u64 *last,
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struct cache_tree *pending,
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struct cache_tree *seen,
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struct cache_tree *reada,
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struct cache_tree *nodes,
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struct cache_tree *extent_cache)
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{
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struct btrfs_buffer *buf;
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u64 bytenr;
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u32 size;
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int ret;
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int i;
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int nritems;
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struct btrfs_leaf *leaf;
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struct btrfs_node *node;
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struct btrfs_disk_key *disk_key;
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struct cache_extent *cache;
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int reada_bits;
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u64 last_block = 0;
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ret = pick_next_pending(pending, reada, nodes, *last, bits,
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bits_nr, &reada_bits);
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if (ret == 0) {
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return 1;
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}
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if (!reada_bits) {
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for(i = 0; i < ret; i++) {
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u64 offset;
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insert_cache_extent(reada, bits[i].start,
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bits[i].size);
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btrfs_map_bh_to_logical(root, &reada_buf,
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bits[i].start);
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offset = reada_buf.dev_bytenr;
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last_block = bits[i].start;
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readahead(reada_buf.fd, offset, bits[i].size);
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}
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}
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*last = bits[0].start;
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bytenr = bits[0].start;
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size = bits[0].size;
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cache = find_cache_extent(pending, bytenr, size);
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if (cache) {
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remove_cache_extent(pending, cache);
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free(cache);
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}
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cache = find_cache_extent(reada, bytenr, size);
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if (cache) {
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remove_cache_extent(reada, cache);
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free(cache);
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}
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cache = find_cache_extent(nodes, bytenr, size);
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if (cache) {
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remove_cache_extent(nodes, cache);
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free(cache);
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}
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buf = read_tree_block(root, bytenr, size);
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nritems = btrfs_header_nritems(&buf->node.header);
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ret = check_block(root, extent_cache, buf);
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if (ret) {
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fprintf(stderr, "bad block %llu\n",
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(unsigned long long)bytenr);
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}
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if (btrfs_is_leaf(&buf->node)) {
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leaf = &buf->leaf;
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btree_space_waste += btrfs_leaf_free_space(root, leaf);
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for (i = 0; i < nritems; i++) {
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struct btrfs_file_extent_item *fi;
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disk_key = &leaf->items[i].key;
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if (btrfs_disk_key_type(disk_key) ==
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BTRFS_EXTENT_ITEM_KEY) {
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struct btrfs_key found;
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struct btrfs_extent_item *ei;
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btrfs_disk_key_to_cpu(&found,
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&leaf->items[i].key);
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ei = btrfs_item_ptr(leaf, i,
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struct btrfs_extent_item);
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add_extent_rec(extent_cache, NULL, 0,
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found.objectid,
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found.offset,
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btrfs_extent_owner(ei),
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btrfs_extent_refs(ei), 0, 0);
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continue;
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}
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if (btrfs_disk_key_type(disk_key) ==
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BTRFS_CSUM_ITEM_KEY) {
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total_csum_bytes +=
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btrfs_item_size(leaf->items + i);
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continue;
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}
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if (btrfs_disk_key_type(disk_key) ==
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BTRFS_BLOCK_GROUP_ITEM_KEY) {
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struct btrfs_block_group_item *bi;
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bi = btrfs_item_ptr(leaf, i,
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struct btrfs_block_group_item);
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#if 0
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fprintf(stderr,"block group %Lu %Lu used %Lu ",
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btrfs_disk_key_objectid(disk_key),
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btrfs_disk_key_offset(disk_key),
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btrfs_block_group_used(bi));
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fprintf(stderr, "flags %x\n", bi->flags);
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#endif
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continue;
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}
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if (btrfs_disk_key_type(&leaf->items[i].key) !=
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BTRFS_EXTENT_DATA_KEY)
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continue;
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fi = btrfs_item_ptr(leaf, i,
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struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(fi) !=
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BTRFS_FILE_EXTENT_REG)
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continue;
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if (btrfs_file_extent_disk_bytenr(fi) == 0)
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continue;
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data_bytes_allocated +=
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btrfs_file_extent_disk_num_bytes(fi);
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data_bytes_referenced +=
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btrfs_file_extent_num_bytes(fi);
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ret = add_extent_rec(extent_cache, NULL, bytenr,
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btrfs_file_extent_disk_bytenr(fi),
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btrfs_file_extent_disk_num_bytes(fi),
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btrfs_disk_key_objectid(&leaf->items[i].key),
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0, 1, 1);
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BUG_ON(ret);
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}
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} else {
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int level;
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node = &buf->node;
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level = btrfs_header_level(&node->header);
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for (i = 0; i < nritems; i++) {
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u64 ptr = btrfs_node_blockptr(node, i);
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u32 size = btrfs_level_size(root, level - 1);
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ret = add_extent_rec(extent_cache,
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&node->ptrs[i].key,
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bytenr, ptr, size,
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btrfs_header_owner(&node->header),
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0, 1, 0);
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BUG_ON(ret);
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if (level > 1) {
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add_pending(nodes, seen, ptr, size);
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} else {
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add_pending(pending, seen, ptr, size);
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}
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}
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btree_space_waste += (BTRFS_NODEPTRS_PER_BLOCK(root) -
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nritems) * sizeof(struct btrfs_key_ptr);
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}
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total_btree_bytes += buf->size;
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btrfs_block_release(root, buf);
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return 0;
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}
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static int add_root_to_pending(struct btrfs_buffer *buf,
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struct block_info *bits,
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int bits_nr,
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struct cache_tree *extent_cache,
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struct cache_tree *pending,
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struct cache_tree *seen,
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struct cache_tree *reada,
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struct cache_tree *nodes)
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{
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if (btrfs_header_level(&buf->node.header) > 0)
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add_pending(nodes, seen, buf->bytenr, buf->size);
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else
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add_pending(pending, seen, buf->bytenr, buf->size);
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add_extent_rec(extent_cache, NULL, 0, buf->bytenr, buf->size,
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btrfs_header_owner(&buf->node.header), 0, 1, 0);
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return 0;
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}
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int check_extent_refs(struct btrfs_root *root,
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struct cache_tree *extent_cache)
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{
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struct extent_record *rec;
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struct cache_extent *cache;
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int err = 0;
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while(1) {
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cache = find_first_cache_extent(extent_cache, 0);
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if (!cache)
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break;
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rec = container_of(cache, struct extent_record, cache);
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if (rec->refs != rec->extent_item_refs) {
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fprintf(stderr, "ref mismatch on [%llu %llu] ",
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(unsigned long long)rec->start,
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(unsigned long long)rec->nr);
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fprintf(stderr, "extent item %u, found %u\n",
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rec->extent_item_refs,
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rec->refs);
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err = 1;
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}
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remove_cache_extent(extent_cache, cache);
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free(rec);
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}
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return err;
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}
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int main(int ac, char **av) {
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struct btrfs_super_block super;
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struct btrfs_root *root;
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struct cache_tree extent_cache;
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struct cache_tree seen;
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struct cache_tree pending;
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struct cache_tree reada;
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struct cache_tree nodes;
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struct btrfs_path path;
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struct btrfs_key key;
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struct btrfs_key found_key;
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int ret;
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u64 last = 0;
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struct block_info *bits;
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int bits_nr;
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struct btrfs_leaf *leaf;
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int slot;
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struct btrfs_root_item *ri;
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radix_tree_init();
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cache_tree_init(&extent_cache);
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cache_tree_init(&seen);
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cache_tree_init(&pending);
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cache_tree_init(&nodes);
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cache_tree_init(&reada);
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root = open_ctree(av[1], &super);
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bits_nr = 1024;
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bits = malloc(bits_nr * sizeof(struct block_info));
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if (!bits) {
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perror("malloc");
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exit(1);
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}
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add_root_to_pending(root->fs_info->tree_root->node, bits, bits_nr,
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&extent_cache, &pending, &seen, &reada, &nodes);
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btrfs_init_path(&path);
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key.offset = 0;
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key.objectid = 0;
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btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
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ret = btrfs_search_slot(NULL, root->fs_info->tree_root,
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&key, &path, 0, 0);
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BUG_ON(ret < 0);
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while(1) {
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leaf = &path.nodes[0]->leaf;
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slot = path.slots[0];
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if (slot >= btrfs_header_nritems(&leaf->header)) {
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ret = btrfs_next_leaf(root, &path);
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if (ret != 0)
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break;
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leaf = &path.nodes[0]->leaf;
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slot = path.slots[0];
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}
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btrfs_disk_key_to_cpu(&found_key,
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&leaf->items[path.slots[0]].key);
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if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
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struct btrfs_buffer *buf;
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ri = btrfs_item_ptr(leaf, path.slots[0],
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struct btrfs_root_item);
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buf = read_tree_block(root->fs_info->tree_root,
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btrfs_root_bytenr(ri),
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btrfs_level_size(root,
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btrfs_root_level(ri)));
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add_root_to_pending(buf, bits, bits_nr, &extent_cache,
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&pending, &seen, &reada, &nodes);
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btrfs_block_release(root->fs_info->tree_root, buf);
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}
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path.slots[0]++;
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}
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btrfs_release_path(root, &path);
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while(1) {
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ret = run_next_block(root, bits, bits_nr, &last, &pending,
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&seen, &reada, &nodes, &extent_cache);
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if (ret != 0)
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break;
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}
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ret = check_extent_refs(root, &extent_cache);
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close_ctree(root, &super);
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printf("found %llu bytes used err is %d\n",
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(unsigned long long)bytes_used, ret);
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printf("total csum bytes: %llu\n",(unsigned long long)total_csum_bytes);
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printf("total tree bytes: %llu\n",
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(unsigned long long)total_btree_bytes);
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printf("btree space waste bytes: %llu\n",
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(unsigned long long)btree_space_waste);
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printf("file data blocks allocated: %llu\n referenced %llu\n",
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(unsigned long long)data_bytes_allocated,
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(unsigned long long)data_bytes_referenced);
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return ret;
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}
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