-
- if (k1.objectid > k2->objectid)
- return 1;
- if (k1.objectid < k2->objectid)
- return -1;
- if (k1.type > k2->type)
- return 1;
- if (k1.type < k2->type)
- return -1;
- if (k1.offset > k2->offset)
- return 1;
- if (k1.offset < k2->offset)
- return -1;
- return 0;
-}
-
-
-#if 0
-int btrfs_realloc_node(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, struct extent_buffer *parent,
- int start_slot, int cache_only, u64 *last_ret,
- struct btrfs_key *progress)
-{
- struct extent_buffer *cur;
- struct extent_buffer *tmp;
- u64 blocknr;
- u64 search_start = *last_ret;
- u64 last_block = 0;
- u64 other;
- u32 parent_nritems;
- int end_slot;
- int i;
- int err = 0;
- int parent_level;
- int uptodate;
- u32 blocksize;
- int progress_passed = 0;
- struct btrfs_disk_key disk_key;
-
- parent_level = btrfs_header_level(parent);
- if (cache_only && parent_level != 1)
- return 0;
-
- if (trans->transaction != root->fs_info->running_transaction) {
- printk(KERN_CRIT "trans %Lu running %Lu\n", trans->transid,
- root->fs_info->running_transaction->transid);
- WARN_ON(1);
- }
- if (trans->transid != root->fs_info->generation) {
- printk(KERN_CRIT "trans %Lu running %Lu\n", trans->transid,
- root->fs_info->generation);
- WARN_ON(1);
- }
-
- parent_nritems = btrfs_header_nritems(parent);
- blocksize = btrfs_level_size(root, parent_level - 1);
- end_slot = parent_nritems;
-
- if (parent_nritems == 1)
- return 0;
-
- for (i = start_slot; i < end_slot; i++) {
- int close = 1;
-
- if (!parent->map_token) {
- map_extent_buffer(parent,
- btrfs_node_key_ptr_offset(i),
- sizeof(struct btrfs_key_ptr),
- &parent->map_token, &parent->kaddr,
- &parent->map_start, &parent->map_len,
- KM_USER1);
- }
- btrfs_node_key(parent, &disk_key, i);
- if (!progress_passed && comp_keys(&disk_key, progress) < 0)
- continue;
-
- progress_passed = 1;
- blocknr = btrfs_node_blockptr(parent, i);
- if (last_block == 0)
- last_block = blocknr;
-
- if (i > 0) {
- other = btrfs_node_blockptr(parent, i - 1);
- close = close_blocks(blocknr, other, blocksize);
- }
- if (close && i < end_slot - 2) {
- other = btrfs_node_blockptr(parent, i + 1);
- close = close_blocks(blocknr, other, blocksize);
- }
- if (close) {
- last_block = blocknr;
- continue;
- }
- if (parent->map_token) {
- unmap_extent_buffer(parent, parent->map_token,
- KM_USER1);
- parent->map_token = NULL;
- }
-
- cur = btrfs_find_tree_block(root, blocknr, blocksize);
- if (cur)
- uptodate = btrfs_buffer_uptodate(cur);
- else
- uptodate = 0;
- if (!cur || !uptodate) {
- if (cache_only) {
- free_extent_buffer(cur);
- continue;
- }
- if (!cur) {
- cur = read_tree_block(root, blocknr,
- blocksize);
- } else if (!uptodate) {
- btrfs_read_buffer(cur);
- }
- }
- if (search_start == 0)
- search_start = last_block;
-
- err = __btrfs_cow_block(trans, root, cur, parent, i,
- &tmp, search_start,
- min(16 * blocksize,
- (end_slot - i) * blocksize));
- if (err) {
- free_extent_buffer(cur);
- break;
- }
- search_start = tmp->start;
- last_block = tmp->start;
- *last_ret = search_start;
- if (parent_level == 1)
- btrfs_clear_buffer_defrag(tmp);
- free_extent_buffer(tmp);
- }
- if (parent->map_token) {
- unmap_extent_buffer(parent, parent->map_token,
- KM_USER1);
- parent->map_token = NULL;
- }
- return err;