8a867d1ddd
Commit 17793e3e6a ("Btrfs-progs: extend the extent cache for the
device extent") extended the cache extent APIs to support objectid to
distinguish between phyisical extents with same dimensions but on
different devices. However, it seems that this particular function is
not used to allocate a device extent with accompanying objectid.
Instead such extents as processed solely by insert_device_extent_record.
Remove the unused code as a result.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
120 lines
3.4 KiB
C
120 lines
3.4 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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#ifndef __BTRFS_EXTENT_CACHE_H__
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#define __BTRFS_EXTENT_CACHE_H__
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#if BTRFS_FLAT_INCLUDES
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#include "kerncompat.h"
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#include "rbtree.h"
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#else
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#include <btrfs/kerncompat.h>
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#include <btrfs/rbtree.h>
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#endif /* BTRFS_FLAT_INCLUDES */
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struct cache_tree {
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struct rb_root root;
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};
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struct cache_extent {
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struct rb_node rb_node;
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u64 objectid;
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u64 start;
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u64 size;
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};
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void cache_tree_init(struct cache_tree *tree);
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struct cache_extent *first_cache_extent(struct cache_tree *tree);
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struct cache_extent *last_cache_extent(struct cache_tree *tree);
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struct cache_extent *prev_cache_extent(struct cache_extent *pe);
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struct cache_extent *next_cache_extent(struct cache_extent *pe);
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/*
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* Find a cache_extent which covers start.
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*
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* If not found, return next cache_extent if possible.
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*/
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struct cache_extent *search_cache_extent(struct cache_tree *tree, u64 start);
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/*
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* Find a cache_extent which restrictly covers start.
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*
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* If not found, return NULL.
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*/
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struct cache_extent *lookup_cache_extent(struct cache_tree *tree,
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u64 start, u64 size);
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/*
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* Add an non-overlap extent into cache tree
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*
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* If [start, start+size) overlap with existing one, it will return -EEXIST.
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*/
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int add_cache_extent(struct cache_tree *tree, u64 start, u64 size);
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/*
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* Same with add_cache_extent, but with cache_extent strcut.
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*/
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int insert_cache_extent(struct cache_tree *tree, struct cache_extent *pe);
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void remove_cache_extent(struct cache_tree *tree, struct cache_extent *pe);
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static inline int cache_tree_empty(struct cache_tree *tree)
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{
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return RB_EMPTY_ROOT(&tree->root);
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}
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typedef void (*free_cache_extent)(struct cache_extent *pe);
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void cache_tree_free_extents(struct cache_tree *tree,
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free_cache_extent free_func);
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#define FREE_EXTENT_CACHE_BASED_TREE(name, free_func) \
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static void free_##name##_tree(struct cache_tree *tree) \
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{ \
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cache_tree_free_extents(tree, free_func); \
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}
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void free_extent_cache_tree(struct cache_tree *tree);
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/*
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* Search a cache_extent with same objectid, and covers start.
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*
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* If not found, return next if possible.
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*/
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struct cache_extent *search_cache_extent2(struct cache_tree *tree,
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u64 objectid, u64 start);
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/*
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* Search a cache_extent with same objectid, and covers the range
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* [start, start + size)
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*
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* If not found, return next cache_extent if possible.
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*/
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struct cache_extent *lookup_cache_extent2(struct cache_tree *tree,
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u64 objectid, u64 start, u64 size);
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int insert_cache_extent2(struct cache_tree *tree, struct cache_extent *pe);
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/*
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* Insert a cache_extent range [start, start + size).
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*
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* This function may merge with existing cache_extent.
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* NOTE: caller must ensure the inserted range won't cover with any existing
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* range.
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*/
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int add_merge_cache_extent(struct cache_tree *tree, u64 start, u64 size);
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#endif
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