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fs/btrfs/free-space-cache.h
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/* * Copyright (C) 2009 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 __BTRFS_FREE_SPACE_CACHE #define __BTRFS_FREE_SPACE_CACHE |
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struct btrfs_free_space { struct rb_node offset_index; u64 offset; u64 bytes; unsigned long *bitmap; struct list_head list; }; |
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struct btrfs_free_space_ctl { spinlock_t tree_lock; struct rb_root free_space_offset; u64 free_space; int extents_thresh; int free_extents; int total_bitmaps; int unit; u64 start; struct btrfs_free_space_op *op; void *private; }; struct btrfs_free_space_op { void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl); bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *info); }; |
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struct inode *lookup_free_space_inode(struct btrfs_root *root, struct btrfs_block_group_cache *block_group, struct btrfs_path *path); int create_free_space_inode(struct btrfs_root *root, struct btrfs_trans_handle *trans, struct btrfs_block_group_cache *block_group, struct btrfs_path *path); |
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int btrfs_check_trunc_cache_free_space(struct btrfs_root *root, struct btrfs_block_rsv *rsv); |
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int btrfs_truncate_free_space_cache(struct btrfs_root *root, struct btrfs_trans_handle *trans, |
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struct inode *inode); |
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int load_free_space_cache(struct btrfs_fs_info *fs_info, struct btrfs_block_group_cache *block_group); |
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int btrfs_write_out_cache(struct btrfs_root *root, struct btrfs_trans_handle *trans, struct btrfs_block_group_cache *block_group, struct btrfs_path *path); |
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struct inode *lookup_free_ino_inode(struct btrfs_root *root, struct btrfs_path *path); int create_free_ino_inode(struct btrfs_root *root, struct btrfs_trans_handle *trans, struct btrfs_path *path); int load_free_ino_cache(struct btrfs_fs_info *fs_info, struct btrfs_root *root); int btrfs_write_out_ino_cache(struct btrfs_root *root, struct btrfs_trans_handle *trans, |
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struct btrfs_path *path, struct inode *inode); |
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void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group); |
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int __btrfs_add_free_space(struct btrfs_free_space_ctl *ctl, u64 bytenr, u64 size); static inline int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, u64 bytenr, u64 size) { return __btrfs_add_free_space(block_group->free_space_ctl, bytenr, size); } |
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int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, u64 bytenr, u64 size); |
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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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u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group, |
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u64 offset, u64 bytes, u64 empty_size, u64 *max_extent_size); |
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u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root); |
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void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, u64 bytes); |
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int btrfs_find_space_cluster(struct btrfs_root *root, |
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struct btrfs_block_group_cache *block_group, struct btrfs_free_cluster *cluster, u64 offset, u64 bytes, u64 empty_size); void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster); u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group, struct btrfs_free_cluster *cluster, u64 bytes, |
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u64 min_start, u64 *max_extent_size); |
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int btrfs_return_cluster_to_free_space( struct btrfs_block_group_cache *block_group, struct btrfs_free_cluster *cluster); |
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int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group, u64 *trimmed, u64 start, u64 end, u64 minlen); |
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/* Support functions for runnint our sanity tests */ #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS int test_add_free_space_entry(struct btrfs_block_group_cache *cache, u64 offset, u64 bytes, bool bitmap); int test_check_exists(struct btrfs_block_group_cache *cache, u64 offset, u64 bytes); #endif |
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#endif |