[linux-2.6-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;

struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
				      struct btrfs_block_group_cache
				      *block_group, struct btrfs_path *path);
int create_free_space_inode(struct btrfs_fs_info *fs_info,
			    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_fs_info *fs_info,
			  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_fs_info *fs_info,
			  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);
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->fs_info,
				      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_fs_info *fs_info,
			     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
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
c9dc4c65 CM	39	struct btrfs_io_ctl;
c9dc4c65 CM	40
77ab86bf	41	struct inode lookup_free_space_inode(struct btrfs_fs_info fs_info,
0af3d00b JB	42	struct btrfs_block_group_cache
0af3d00b JB	43	block_group, struct btrfs_path path);
77ab86bf	44	int create_free_space_inode(struct btrfs_fs_info *fs_info,
0af3d00b JB	45	struct btrfs_trans_handle *trans,
	46	struct btrfs_block_group_cache *block_group,
	47	struct btrfs_path *path);
0cb59c99	48
2ff7e61e	49	int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
7b61cd92	50	struct btrfs_block_rsv *rsv);
77ab86bf	51	int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
1bbc621e	52	struct btrfs_block_group_cache *block_group,
0af3d00b	53	struct inode *inode);
9d66e233 JB	54	int load_free_space_cache(struct btrfs_fs_info *fs_info,
9d66e233 JB	55	struct btrfs_block_group_cache *block_group);
afdb5718	56	int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
c9dc4c65	57	struct btrfs_block_group_cache *block_group,
afdb5718	58	struct btrfs_path *path);
5b4aacef	59	int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
0cb59c99 JB	60	struct btrfs_trans_handle *trans,
	61	struct btrfs_block_group_cache *block_group,
	62	struct btrfs_path *path);
82d5902d LZ	63	struct inode lookup_free_ino_inode(struct btrfs_root root,
	64	struct btrfs_path *path);
	65	int create_free_ino_inode(struct btrfs_root *root,
	66	struct btrfs_trans_handle *trans,
	67	struct btrfs_path *path);
	68	int load_free_ino_cache(struct btrfs_fs_info *fs_info,
	69	struct btrfs_root *root);
	70	int btrfs_write_out_ino_cache(struct btrfs_root *root,
	71	struct btrfs_trans_handle *trans,
53645a91 FDBM	72	struct btrfs_path *path,
53645a91 FDBM	73	struct inode *inode);
82d5902d	74
34d52cb6	75	void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
ab8d0fc4 JM	76	int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
ab8d0fc4 JM	77	struct btrfs_free_space_ctl *ctl,
581bb050 LZ	78	u64 bytenr, u64 size);
	79	static inline int
	80	btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
	81	u64 bytenr, u64 size)
	82	{
ab8d0fc4 JM	83	return __btrfs_add_free_space(block_group->fs_info,
ab8d0fc4 JM	84	block_group->free_space_ctl,
581bb050 LZ	85	bytenr, size);
581bb050 LZ	86	}
fa9c0d79 CM	87	int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
fa9c0d79 CM	88	u64 bytenr, u64 size);
581bb050	89	void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
fa9c0d79	90	void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
581bb050	91	*block_group);
fa9c0d79	92	u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
a4820398 MX	93	u64 offset, u64 bytes, u64 empty_size,
a4820398 MX	94	u64 *max_extent_size);
581bb050	95	u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
fa9c0d79 CM	96	void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
fa9c0d79 CM	97	u64 bytes);
2ff7e61e	98	int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
fa9c0d79 CM	99	struct btrfs_block_group_cache *block_group,
	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);
	103	u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
	104	struct btrfs_free_cluster *cluster, u64 bytes,
a4820398	105	u64 min_start, u64 *max_extent_size);
fa9c0d79 CM	106	int btrfs_return_cluster_to_free_space(
	107	struct btrfs_block_group_cache *block_group,
	108	struct btrfs_free_cluster *cluster);
f7039b1d LD	109	int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
f7039b1d LD	110	u64 *trimmed, u64 start, u64 end, u64 minlen);
74255aa0	111
01327610	112	/* Support functions for running our sanity tests */
dc11dd5d JB	113	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	114	int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
	115	u64 offset, u64 bytes, bool bitmap);
	116	int test_check_exists(struct btrfs_block_group_cache *cache,
	117	u64 offset, u64 bytes);
	118	#endif
74255aa0	119
fa9c0d79	120	#endif