9d66e233c7
This patch actually loads the free space cache if it exists. The only thing that really changes here is that we need to cache the block group if we're going to remove an extent from it. Previously we did not do this since the caching kthread would pick it up. With the on disk cache we don't have this luxury so we need to make sure we read the on disk cache in first, and then remove the extent, that way when the extent is unpinned the free space is added to the block group. This has been tested with all sorts of things. Signed-off-by: Josef Bacik <josef@redhat.com>
72 lines
2.8 KiB
C
72 lines
2.8 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 inode *lookup_free_space_inode(struct btrfs_root *root,
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struct btrfs_block_group_cache
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*block_group, struct btrfs_path *path);
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int create_free_space_inode(struct btrfs_root *root,
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struct btrfs_trans_handle *trans,
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struct btrfs_block_group_cache *block_group,
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struct btrfs_path *path);
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int btrfs_truncate_free_space_cache(struct btrfs_root *root,
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struct btrfs_trans_handle *trans,
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struct btrfs_path *path,
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struct inode *inode);
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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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int btrfs_write_out_cache(struct btrfs_root *root,
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struct btrfs_trans_handle *trans,
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struct btrfs_block_group_cache *block_group,
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struct btrfs_path *path);
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int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
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u64 bytenr, u64 size);
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int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
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u64 bytenr, u64 size);
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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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u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
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u64 offset, u64 bytes, u64 empty_size);
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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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u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
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int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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struct btrfs_block_group_cache *block_group,
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struct btrfs_free_cluster *cluster,
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u64 offset, u64 bytes, u64 empty_size);
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void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
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u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
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struct btrfs_free_cluster *cluster, u64 bytes,
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u64 min_start);
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int btrfs_return_cluster_to_free_space(
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struct btrfs_block_group_cache *block_group,
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struct btrfs_free_cluster *cluster);
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#endif
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