| /* |
| * 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 |
| |
| struct btrfs_free_space { |
| struct rb_node offset_index; |
| u64 offset; |
| u64 bytes; |
| unsigned long *bitmap; |
| struct list_head list; |
| }; |
| |
| 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); |
| }; |
| |
| 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); |
| |
| int btrfs_check_trunc_cache_free_space(struct btrfs_root *root, |
| struct btrfs_block_rsv *rsv); |
| int btrfs_truncate_free_space_cache(struct btrfs_root *root, |
| struct btrfs_trans_handle *trans, |
| struct inode *inode); |
| int load_free_space_cache(struct btrfs_fs_info *fs_info, |
| struct btrfs_block_group_cache *block_group); |
| 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); |
| |
| 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, |
| struct btrfs_path *path, |
| struct inode *inode); |
| |
| void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group); |
| 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); |
| } |
| int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, |
| u64 bytenr, u64 size); |
| void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl); |
| void btrfs_remove_free_space_cache(struct btrfs_block_group_cache |
| *block_group); |
| u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group, |
| u64 offset, u64 bytes, u64 empty_size, |
| u64 *max_extent_size); |
| u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root); |
| void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, |
| u64 bytes); |
| int btrfs_find_space_cluster(struct btrfs_root *root, |
| 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, |
| u64 min_start, u64 *max_extent_size); |
| int btrfs_return_cluster_to_free_space( |
| struct btrfs_block_group_cache *block_group, |
| struct btrfs_free_cluster *cluster); |
| int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group, |
| u64 *trimmed, u64 start, u64 end, u64 minlen); |
| |
| /* 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 |
| |
| #endif |