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- /* 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_cache *block_group,
- struct btrfs_path *path);
- int create_free_space_inode(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_fs_info *fs_info,
- struct btrfs_block_rsv *rsv);
- int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
- struct btrfs_block_group_cache *block_group,
- struct inode *inode);
- int load_free_space_cache(struct btrfs_block_group_cache *block_group);
- int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
- struct btrfs_block_group_cache *block_group,
- struct btrfs_path *path);
- int btrfs_write_out_cache(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_fs_info *fs_info,
- struct btrfs_free_space_ctl *ctl,
- u64 bytenr, u64 size);
- int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
- u64 bytenr, u64 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_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 running 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
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