From f2b0cbe8e83229512a6a0583f847e8e17e4cd0eb Mon Sep 17 00:00:00 2001 From: David Sterba Date: Mon, 28 Aug 2017 17:39:26 +0200 Subject: btrfs-progs: move transaction code out of disk-io Temporarily export the low-level helpers. Signed-off-by: David Sterba --- disk-io.c | 123 -------------------------------------------------------------- 1 file changed, 123 deletions(-) (limited to 'disk-io.c') diff --git a/disk-io.c b/disk-io.c index f969c9b5..29aec0ba 100644 --- a/disk-io.c +++ b/disk-io.c @@ -481,129 +481,6 @@ void btrfs_setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, root->root_key.objectid = objectid; } -static int update_cowonly_root(struct btrfs_trans_handle *trans, - struct btrfs_root *root) -{ - int ret; - u64 old_root_bytenr; - struct btrfs_root *tree_root = root->fs_info->tree_root; - - btrfs_write_dirty_block_groups(trans, root); - while(1) { - old_root_bytenr = btrfs_root_bytenr(&root->root_item); - if (old_root_bytenr == root->node->start) - break; - btrfs_set_root_bytenr(&root->root_item, - root->node->start); - btrfs_set_root_generation(&root->root_item, - trans->transid); - root->root_item.level = btrfs_header_level(root->node); - ret = btrfs_update_root(trans, tree_root, - &root->root_key, - &root->root_item); - BUG_ON(ret); - btrfs_write_dirty_block_groups(trans, root); - } - return 0; -} - -static int commit_tree_roots(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info) -{ - struct btrfs_root *root; - struct list_head *next; - struct extent_buffer *eb; - int ret; - - if (fs_info->readonly) - return 0; - - eb = fs_info->tree_root->node; - extent_buffer_get(eb); - ret = btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb); - free_extent_buffer(eb); - if (ret) - return ret; - - while(!list_empty(&fs_info->dirty_cowonly_roots)) { - next = fs_info->dirty_cowonly_roots.next; - list_del_init(next); - root = list_entry(next, struct btrfs_root, dirty_list); - update_cowonly_root(trans, root); - free_extent_buffer(root->commit_root); - root->commit_root = NULL; - } - - return 0; -} - -static int __commit_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root) -{ - u64 start; - u64 end; - struct btrfs_fs_info *fs_info = root->fs_info; - struct extent_buffer *eb; - struct extent_io_tree *tree = &fs_info->extent_cache; - int ret; - - while(1) { - ret = find_first_extent_bit(tree, 0, &start, &end, - EXTENT_DIRTY); - if (ret) - break; - while(start <= end) { - eb = find_first_extent_buffer(tree, start); - BUG_ON(!eb || eb->start != start); - ret = write_tree_block(trans, fs_info, eb); - BUG_ON(ret); - start += eb->len; - clear_extent_buffer_dirty(eb); - free_extent_buffer(eb); - } - } - return 0; -} - -int btrfs_commit_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root) -{ - u64 transid = trans->transid; - int ret = 0; - struct btrfs_fs_info *fs_info = root->fs_info; - - if (root->commit_root == root->node) - goto commit_tree; - if (root == root->fs_info->tree_root) - goto commit_tree; - if (root == root->fs_info->chunk_root) - goto commit_tree; - - free_extent_buffer(root->commit_root); - root->commit_root = NULL; - - btrfs_set_root_bytenr(&root->root_item, root->node->start); - btrfs_set_root_generation(&root->root_item, trans->transid); - root->root_item.level = btrfs_header_level(root->node); - ret = btrfs_update_root(trans, root->fs_info->tree_root, - &root->root_key, &root->root_item); - BUG_ON(ret); -commit_tree: - ret = commit_tree_roots(trans, fs_info); - BUG_ON(ret); - ret = __commit_transaction(trans, root); - BUG_ON(ret); - write_ctree_super(trans, fs_info); - btrfs_finish_extent_commit(trans, fs_info->extent_root, - &fs_info->pinned_extents); - kfree(trans); - free_extent_buffer(root->commit_root); - root->commit_root = NULL; - fs_info->running_transaction = NULL; - fs_info->last_trans_committed = transid; - return 0; -} - static int find_and_setup_root(struct btrfs_root *tree_root, struct btrfs_fs_info *fs_info, u64 objectid, struct btrfs_root *root) -- cgit v1.2.3