| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2009 Oracle. All rights reserved. |
| */ |
| |
| #ifndef BTRFS_FREE_SPACE_CACHE_H |
| #define BTRFS_FREE_SPACE_CACHE_H |
| |
| struct btrfs_free_space { |
| struct rb_node offset_index; |
| u64 offset; |
| u64 bytes; |
| u64 max_extent_size; |
| 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; |
| const struct btrfs_free_space_op *op; |
| void *private; |
| struct mutex cache_writeout_mutex; |
| struct list_head trimming_ranges; |
| }; |
| |
| 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 btrfs_io_ctl { |
| void *cur, *orig; |
| struct page *page; |
| struct page **pages; |
| struct btrfs_fs_info *fs_info; |
| struct inode *inode; |
| unsigned long size; |
| int index; |
| int num_pages; |
| int entries; |
| int bitmaps; |
| unsigned check_crcs:1; |
| }; |
| |
| struct inode *lookup_free_space_inode(struct btrfs_block_group *block_group, |
| struct btrfs_path *path); |
| int create_free_space_inode(struct btrfs_trans_handle *trans, |
| struct btrfs_block_group *block_group, |
| struct btrfs_path *path); |
| |
| int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, |
| struct btrfs_block_rsv *rsv); |
| int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans, |
| struct btrfs_block_group *block_group, |
| struct inode *inode); |
| int load_free_space_cache(struct btrfs_block_group *block_group); |
| int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, |
| struct btrfs_block_group *block_group, |
| struct btrfs_path *path); |
| int btrfs_write_out_cache(struct btrfs_trans_handle *trans, |
| struct btrfs_block_group *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 *block_group); |
| int __btrfs_add_free_space(struct btrfs_fs_info *fs_info, |
| struct btrfs_free_space_ctl *ctl, |
| u64 bytenr, u64 size); |
| int btrfs_add_free_space(struct btrfs_block_group *block_group, |
| u64 bytenr, u64 size); |
| int btrfs_remove_free_space(struct btrfs_block_group *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 *block_group); |
| u64 btrfs_find_space_for_alloc(struct btrfs_block_group *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 *block_group, |
| u64 bytes); |
| int btrfs_find_space_cluster(struct btrfs_block_group *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 *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 *block_group, |
| struct btrfs_free_cluster *cluster); |
| int btrfs_trim_block_group(struct btrfs_block_group *block_group, |
| u64 *trimmed, u64 start, u64 end, u64 minlen); |
| |
| /* Support functions for running our sanity tests */ |
| #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| int test_add_free_space_entry(struct btrfs_block_group *cache, |
| u64 offset, u64 bytes, bool bitmap); |
| int test_check_exists(struct btrfs_block_group *cache, u64 offset, u64 bytes); |
| #endif |
| |
| #endif |