2c0e02a568
The value of sector for space cache was hardcoded to 4k, and used to calculate bitmap sizes. In kernel, the BITS_PER_BITMAP is derived from PAGE_CACHE_SIZE which is not available for userspace, that can also deal with filesystem of varying sectorsize. Signed-off-by: David Sterba <dsterba@suse.cz>
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
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* Copyright (C) 2009 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_FREE_SPACE_CACHE
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#define __BTRFS_FREE_SPACE_CACHE
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struct btrfs_free_space {
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struct rb_node offset_index;
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u64 offset;
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u64 bytes;
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unsigned long *bitmap;
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struct list_head list;
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};
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struct btrfs_free_space_ctl {
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struct rb_root free_space_offset;
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u64 free_space;
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int extents_thresh;
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int free_extents;
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int total_bitmaps;
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int unit;
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u64 start;
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void *private;
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u32 sectorsize;
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};
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int load_free_space_cache(struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *block_group);
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void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
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void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
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*block_group);
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void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
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u64 bytes);
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struct btrfs_free_space *
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btrfs_find_free_space(struct btrfs_free_space_ctl *ctl, u64 offset, u64 bytes);
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int btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group,
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int sectorsize);
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void unlink_free_space(struct btrfs_free_space_ctl *ctl,
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struct btrfs_free_space *info);
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#endif
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