diff options
Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r-- | fs/btrfs/ctree.c | 56 |
1 files changed, 16 insertions, 40 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index d1c56c9..f6ba165 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -45,9 +45,7 @@ static int tree_mod_log_free_eb(struct btrfs_fs_info *fs_info, struct btrfs_path *btrfs_alloc_path(void) { - struct btrfs_path *path; - path = kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS); - return path; + return kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS); } /* @@ -1102,7 +1100,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, int level, ret; int last_ref = 0; int unlock_orig = 0; - u64 parent_start; + u64 parent_start = 0; if (*cow_ret == buf) unlock_orig = 1; @@ -1121,13 +1119,8 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, else btrfs_node_key(buf, &disk_key, 0); - if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) { - if (parent) - parent_start = parent->start; - else - parent_start = 0; - } else - parent_start = 0; + if ((root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) && parent) + parent_start = parent->start; cow = btrfs_alloc_tree_block(trans, root, parent_start, root->root_key.objectid, &disk_key, level, @@ -1170,8 +1163,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID || btrfs_header_backref_rev(buf) < BTRFS_MIXED_BACKREF_REV) parent_start = buf->start; - else - parent_start = 0; extent_buffer_get(cow); tree_mod_log_set_root_pointer(root, cow, 1); @@ -1182,11 +1173,6 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, free_extent_buffer(buf); add_root_to_dirty_list(root); } else { - if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) - parent_start = parent->start; - else - parent_start = 0; - WARN_ON(trans->transid != btrfs_header_generation(parent)); tree_mod_log_insert_key(root->fs_info, parent, parent_slot, MOD_LOG_KEY_REPLACE, GFP_NOFS); @@ -1729,20 +1715,6 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, return err; } -/* - * The leaf data grows from end-to-front in the node. - * this returns the address of the start of the last item, - * which is the stop of the leaf data stack - */ -static inline unsigned int leaf_data_end(struct btrfs_root *root, - struct extent_buffer *leaf) -{ - u32 nr = btrfs_header_nritems(leaf); - if (nr == 0) - return BTRFS_LEAF_DATA_SIZE(root); - return btrfs_item_offset_nr(leaf, nr - 1); -} - /* * search for key in the extent_buffer. The items start at offset p, @@ -2268,7 +2240,6 @@ static void reada_for_search(struct btrfs_root *root, u64 search; u64 target; u64 nread = 0; - u64 gen; struct extent_buffer *eb; u32 nr; u32 blocksize; @@ -2313,7 +2284,6 @@ static void reada_for_search(struct btrfs_root *root, search = btrfs_node_blockptr(node, nr); if ((search <= target && target - search <= 65536) || (search > target && search - target <= 65536)) { - gen = btrfs_node_ptr_generation(node, nr); readahead_tree_block(root, search); nread += blocksize; } @@ -4341,7 +4311,11 @@ again: if (path->slots[1] == 0) fixup_low_keys(fs_info, path, &disk_key, 1); } - btrfs_mark_buffer_dirty(right); + /* + * We create a new leaf 'right' for the required ins_len and + * we'll do btrfs_mark_buffer_dirty() on this leaf after copying + * the content of ins_len to 'right'. + */ return ret; } @@ -4772,8 +4746,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, if (btrfs_leaf_free_space(root, leaf) < total_size) { btrfs_print_leaf(root, leaf); - btrfs_crit(root->fs_info, "not enough freespace need %u have %d", - total_size, btrfs_leaf_free_space(root, leaf)); + btrfs_crit(root->fs_info, + "not enough freespace need %u have %d", + total_size, btrfs_leaf_free_space(root, leaf)); BUG(); } @@ -4782,8 +4757,9 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, if (old_data < data_end) { btrfs_print_leaf(root, leaf); - btrfs_crit(root->fs_info, "slot %d old_data %d data_end %d", - slot, old_data, data_end); + btrfs_crit(root->fs_info, + "slot %d old_data %d data_end %d", + slot, old_data, data_end); BUG_ON(1); } /* @@ -4793,7 +4769,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, for (i = slot; i < nritems; i++) { u32 ioff; - item = btrfs_item_nr( i); + item = btrfs_item_nr(i); ioff = btrfs_token_item_offset(leaf, item, &token); btrfs_set_token_item_offset(leaf, item, ioff - total_data, &token); |