[linux-block.git] / fs / btrfs / free-space-cache.h

/* 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
Commit	Line	Data
9888c340	1	/* SPDX-License-Identifier: GPL-2.0 */
fa9c0d79 CM	2	/*
fa9c0d79 CM	3	* Copyright (C) 2009 Oracle. All rights reserved.
fa9c0d79 CM	4	*/
fa9c0d79 CM	5
9888c340 DS	6	#ifndef BTRFS_FREE_SPACE_CACHE_H
9888c340 DS	7	#define BTRFS_FREE_SPACE_CACHE_H
fa9c0d79	8
96303081 JB	9	struct btrfs_free_space {
	10	struct rb_node offset_index;
	11	u64 offset;
	12	u64 bytes;
cef40483	13	u64 max_extent_size;
96303081 JB	14	unsigned long *bitmap;
	15	struct list_head list;
	16	};
	17
34d52cb6 LZ	18	struct btrfs_free_space_ctl {
	19	spinlock_t tree_lock;
	20	struct rb_root free_space_offset;
	21	u64 free_space;
	22	int extents_thresh;
	23	int free_extents;
	24	int total_bitmaps;
	25	int unit;
	26	u64 start;
20e5506b	27	const struct btrfs_free_space_op *op;
34d52cb6	28	void *private;
55507ce3 FM	29	struct mutex cache_writeout_mutex;
55507ce3 FM	30	struct list_head trimming_ranges;
34d52cb6 LZ	31	};
	32
	33	struct btrfs_free_space_op {
	34	void (recalc_thresholds)(struct btrfs_free_space_ctl ctl);
	35	bool (use_bitmap)(struct btrfs_free_space_ctl ctl,
	36	struct btrfs_free_space *info);
	37	};
	38
67b61aef DS	39	struct btrfs_io_ctl {
	40	void cur, orig;
	41	struct page *page;
	42	struct page **pages;
	43	struct btrfs_fs_info *fs_info;
	44	struct inode *inode;
	45	unsigned long size;
	46	int index;
	47	int num_pages;
	48	int entries;
	49	int bitmaps;
	50	unsigned check_crcs:1;
	51	};
c9dc4c65	52
32da5386	53	struct inode lookup_free_space_inode(struct btrfs_block_group block_group,
7949f339	54	struct btrfs_path *path);
4ca75f1b	55	int create_free_space_inode(struct btrfs_trans_handle *trans,
32da5386	56	struct btrfs_block_group *block_group,
0af3d00b	57	struct btrfs_path *path);
0cb59c99	58
2ff7e61e	59	int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
7b61cd92	60	struct btrfs_block_rsv *rsv);
77ab86bf	61	int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
32da5386	62	struct btrfs_block_group *block_group,
0af3d00b	63	struct inode *inode);
32da5386	64	int load_free_space_cache(struct btrfs_block_group *block_group);
afdb5718	65	int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
32da5386	66	struct btrfs_block_group *block_group,
afdb5718	67	struct btrfs_path *path);
fe041534	68	int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
32da5386	69	struct btrfs_block_group *block_group,
0cb59c99	70	struct btrfs_path *path);
82d5902d LZ	71	struct inode lookup_free_ino_inode(struct btrfs_root root,
	72	struct btrfs_path *path);
	73	int create_free_ino_inode(struct btrfs_root *root,
	74	struct btrfs_trans_handle *trans,
	75	struct btrfs_path *path);
	76	int load_free_ino_cache(struct btrfs_fs_info *fs_info,
	77	struct btrfs_root *root);
	78	int btrfs_write_out_ino_cache(struct btrfs_root *root,
	79	struct btrfs_trans_handle *trans,
53645a91 FDBM	80	struct btrfs_path *path,
53645a91 FDBM	81	struct inode *inode);
82d5902d	82
32da5386	83	void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group);
ab8d0fc4 JM	84	int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
ab8d0fc4 JM	85	struct btrfs_free_space_ctl *ctl,
581bb050	86	u64 bytenr, u64 size);
32da5386	87	int btrfs_add_free_space(struct btrfs_block_group *block_group,
478b4d9f	88	u64 bytenr, u64 size);
32da5386	89	int btrfs_remove_free_space(struct btrfs_block_group *block_group,
fa9c0d79	90	u64 bytenr, u64 size);
581bb050	91	void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
32da5386 DS	92	void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group);
32da5386 DS	93	u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group,
a4820398 MX	94	u64 offset, u64 bytes, u64 empty_size,
a4820398 MX	95	u64 *max_extent_size);
581bb050	96	u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
32da5386	97	void btrfs_dump_free_space(struct btrfs_block_group *block_group,
fa9c0d79	98	u64 bytes);
32da5386	99	int btrfs_find_space_cluster(struct btrfs_block_group *block_group,
fa9c0d79 CM	100	struct btrfs_free_cluster *cluster,
	101	u64 offset, u64 bytes, u64 empty_size);
	102	void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
32da5386	103	u64 btrfs_alloc_from_cluster(struct btrfs_block_group *block_group,
fa9c0d79	104	struct btrfs_free_cluster *cluster, u64 bytes,
a4820398	105	u64 min_start, u64 *max_extent_size);
fa9c0d79	106	int btrfs_return_cluster_to_free_space(
32da5386	107	struct btrfs_block_group *block_group,
fa9c0d79	108	struct btrfs_free_cluster *cluster);
32da5386	109	int btrfs_trim_block_group(struct btrfs_block_group *block_group,
f7039b1d	110	u64 *trimmed, u64 start, u64 end, u64 minlen);
74255aa0	111
01327610	112	/* Support functions for running our sanity tests */
dc11dd5d	113	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
32da5386	114	int test_add_free_space_entry(struct btrfs_block_group *cache,
dc11dd5d	115	u64 offset, u64 bytes, bool bitmap);
32da5386	116	int test_check_exists(struct btrfs_block_group *cache, u64 offset, u64 bytes);
dc11dd5d	117	#endif
74255aa0	118
fa9c0d79	119	#endif