Blame - fs/btrfs/free-space-cache.h - hafnium/third_party/linux

blob: 39c32c8fc24f80215ed70a8ebbea695196aebeed [file] [log] [blame]

Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	1	/* SPDX-License-Identifier: GPL-2.0 */
				2	/*
				3	* Copyright (C) 2009 Oracle. All rights reserved.
				4	*/
				5
				6	#ifndef BTRFS_FREE_SPACE_CACHE_H
				7	#define BTRFS_FREE_SPACE_CACHE_H
				8
				9	struct btrfs_free_space {
				10	struct rb_node offset_index;
				11	u64 offset;
				12	u64 bytes;
				13	u64 max_extent_size;
				14	unsigned long *bitmap;
				15	struct list_head list;
				16	};
				17
				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;
				27	const struct btrfs_free_space_op *op;
				28	void *private;
				29	struct mutex cache_writeout_mutex;
				30	struct list_head trimming_ranges;
				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
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	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	};
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	52
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	53	struct inode *lookup_free_space_inode(
				54	struct btrfs_block_group_cache *block_group,
				55	struct btrfs_path *path);
				56	int create_free_space_inode(struct btrfs_trans_handle *trans,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	57	struct btrfs_block_group_cache *block_group,
				58	struct btrfs_path *path);
				59
				60	int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
				61	struct btrfs_block_rsv *rsv);
				62	int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
				63	struct btrfs_block_group_cache *block_group,
				64	struct inode *inode);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	65	int load_free_space_cache(struct btrfs_block_group_cache *block_group);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	66	int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
				67	struct btrfs_block_group_cache *block_group,
				68	struct btrfs_path *path);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	69	int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	70	struct btrfs_block_group_cache *block_group,
				71	struct btrfs_path *path);
				72	struct inode lookup_free_ino_inode(struct btrfs_root root,
				73	struct btrfs_path *path);
				74	int create_free_ino_inode(struct btrfs_root *root,
				75	struct btrfs_trans_handle *trans,
				76	struct btrfs_path *path);
				77	int load_free_ino_cache(struct btrfs_fs_info *fs_info,
				78	struct btrfs_root *root);
				79	int btrfs_write_out_ino_cache(struct btrfs_root *root,
				80	struct btrfs_trans_handle *trans,
				81	struct btrfs_path *path,
				82	struct inode *inode);
				83
				84	void btrfs_init_free_space_ctl(struct btrfs_block_group_cache *block_group);
				85	int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
				86	struct btrfs_free_space_ctl *ctl,
				87	u64 bytenr, u64 size);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	88	int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
				89	u64 bytenr, u64 size);
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	90	int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
				91	u64 bytenr, u64 size);
				92	void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
				93	void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
				94	*block_group);
				95	u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
				96	u64 offset, u64 bytes, u64 empty_size,
				97	u64 *max_extent_size);
				98	u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
				99	void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
				100	u64 bytes);
David Brazdil	0f672f6	2019-12-10 10:32:29 +0000	[diff] [blame^]	101	int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
Andrew Scull	b4b6d4a	2019-01-02 15:54:55 +0000	[diff] [blame]	102	struct btrfs_free_cluster *cluster,
				103	u64 offset, u64 bytes, u64 empty_size);
				104	void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
				105	u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
				106	struct btrfs_free_cluster *cluster, u64 bytes,
				107	u64 min_start, u64 *max_extent_size);
				108	int btrfs_return_cluster_to_free_space(
				109	struct btrfs_block_group_cache *block_group,
				110	struct btrfs_free_cluster *cluster);
				111	int btrfs_trim_block_group(struct btrfs_block_group_cache *block_group,
				112	u64 *trimmed, u64 start, u64 end, u64 minlen);
				113
				114	/* Support functions for running our sanity tests */
				115	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
				116	int test_add_free_space_entry(struct btrfs_block_group_cache *cache,
				117	u64 offset, u64 bytes, bool bitmap);
				118	int test_check_exists(struct btrfs_block_group_cache *cache,
				119	u64 offset, u64 bytes);
				120	#endif
				121
				122	#endif