diff options
Diffstat (limited to 'extent-cache.h')
| -rw-r--r-- | extent-cache.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/extent-cache.h b/extent-cache.h new file mode 100644 index 00000000..9e933752 --- /dev/null +++ b/extent-cache.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2007 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef __PENDING_EXTENT__ +#define __PENDING_EXTENT__ +#include "kerncompat.h" +#include "rbtree.h" + +struct cache_tree { + struct rb_root root; +}; + +struct cache_extent { + struct rb_node rb_node; + u64 start; + u64 size; +}; + +void cache_tree_init(struct cache_tree *tree); +void remove_cache_extent(struct cache_tree *tree, + struct cache_extent *pe); +struct cache_extent *find_first_cache_extent(struct cache_tree *tree, + u64 start); +struct cache_extent *next_cache_extent(struct cache_extent *pe); +struct cache_extent *find_cache_extent(struct cache_tree *tree, + u64 start, u64 size); +int insert_cache_extent(struct cache_tree *tree, u64 start, u64 size); +int insert_existing_cache_extent(struct cache_tree *tree, + struct cache_extent *pe); + +static inline void free_cache_extent(struct cache_extent *pe) +{ + free(pe); +} + +struct cache_extent *alloc_pending_extent(u64 start, u64 size); + +#endif |