[linux-block.git] / fs / btrfs / block-group.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef BTRFS_BLOCK_GROUP_H
#define BTRFS_BLOCK_GROUP_H

#include "free-space-cache.h"

enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN,
	BTRFS_DC_ERROR,
	BTRFS_DC_CLEAR,
	BTRFS_DC_SETUP,
};

enum btrfs_block_group_size_class {
	/* Unset */
	BTRFS_BG_SZ_NONE,
	/* 0 < size <= 128K */
	BTRFS_BG_SZ_SMALL,
	/* 128K < size <= 8M */
	BTRFS_BG_SZ_MEDIUM,
	/* 8M < size < BG_LENGTH */
	BTRFS_BG_SZ_LARGE,
};

/*
 * This describes the state of the block_group for async discard.  This is due
 * to the two pass nature of it where extent discarding is prioritized over
 * bitmap discarding.  BTRFS_DISCARD_RESET_CURSOR is set when we are resetting
 * between lists to prevent contention for discard state variables
 * (eg. discard_cursor).
 */
enum btrfs_discard_state {
	BTRFS_DISCARD_EXTENTS,
	BTRFS_DISCARD_BITMAPS,
	BTRFS_DISCARD_RESET_CURSOR,
};

/*
 * Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to
 * only allocate a chunk if we really need one.
 *
 * CHUNK_ALLOC_LIMITED means to only try and allocate one if we have very few
 * chunks already allocated.  This is used as part of the clustering code to
 * help make sure we have a good pool of storage to cluster in, without filling
 * the FS with empty chunks
 *
 * CHUNK_ALLOC_FORCE means it must try to allocate one
 *
 * CHUNK_ALLOC_FORCE_FOR_EXTENT like CHUNK_ALLOC_FORCE but called from
 * find_free_extent() that also activaes the zone
 */
enum btrfs_chunk_alloc_enum {
	CHUNK_ALLOC_NO_FORCE,
	CHUNK_ALLOC_LIMITED,
	CHUNK_ALLOC_FORCE,
	CHUNK_ALLOC_FORCE_FOR_EXTENT,
};

/* Block group flags set at runtime */
enum btrfs_block_group_flags {
	BLOCK_GROUP_FLAG_IREF,
	BLOCK_GROUP_FLAG_REMOVED,
	BLOCK_GROUP_FLAG_TO_COPY,
	BLOCK_GROUP_FLAG_RELOCATING_REPAIR,
	BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
	BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
	BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
	/* Does the block group need to be added to the free space tree? */
	BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
	/* Indicate that the block group is placed on a sequential zone */
	BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE,
};

enum btrfs_caching_type {
	BTRFS_CACHE_NO,
	BTRFS_CACHE_STARTED,
	BTRFS_CACHE_FINISHED,
	BTRFS_CACHE_ERROR,
};

struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
	struct btrfs_work work;
	struct btrfs_block_group *block_group;
	refcount_t count;
};

/* Once caching_thread() finds this much free space, it will wake up waiters. */
#define CACHING_CTL_WAKE_UP SZ_2M

struct btrfs_block_group {
	struct btrfs_fs_info *fs_info;
	struct inode *inode;
	spinlock_t lock;
	u64 start;
	u64 length;
	u64 pinned;
	u64 reserved;
	u64 used;
	u64 delalloc_bytes;
	u64 bytes_super;
	u64 flags;
	u64 cache_generation;
	u64 global_root_id;

	/*
	 * The last committed used bytes of this block group, if the above @used
	 * is still the same as @commit_used, we don't need to update block
	 * group item of this block group.
	 */
	u64 commit_used;
	/*
	 * If the free space extent count exceeds this number, convert the block
	 * group to bitmaps.
	 */
	u32 bitmap_high_thresh;

	/*
	 * If the free space extent count drops below this number, convert the
	 * block group back to extents.
	 */
	u32 bitmap_low_thresh;

	/*
	 * It is just used for the delayed data space allocation because
	 * only the data space allocation and the relative metadata update
	 * can be done cross the transaction.
	 */
	struct rw_semaphore data_rwsem;

	/* For raid56, this is a full stripe, without parity */
	unsigned long full_stripe_len;
	unsigned long runtime_flags;

	unsigned int ro;

	int disk_cache_state;

	/* Cache tracking stuff */
	int cached;
	struct btrfs_caching_control *caching_ctl;

	struct btrfs_space_info *space_info;

	/* Free space cache stuff */
	struct btrfs_free_space_ctl *free_space_ctl;

	/* Block group cache stuff */
	struct rb_node cache_node;

	/* For block groups in the same raid type */
	struct list_head list;

	refcount_t refs;

	/*
	 * List of struct btrfs_free_clusters for this block group.
	 * Today it will only have one thing on it, but that may change
	 */
	struct list_head cluster_list;

	/*
	 * Used for several lists:
	 *
	 * 1) struct btrfs_fs_info::unused_bgs
	 * 2) struct btrfs_fs_info::reclaim_bgs
	 * 3) struct btrfs_transaction::deleted_bgs
	 * 4) struct btrfs_trans_handle::new_bgs
	 */
	struct list_head bg_list;

	/* For read-only block groups */
	struct list_head ro_list;

	/*
	 * When non-zero it means the block group's logical address and its
	 * device extents can not be reused for future block group allocations
	 * until the counter goes down to 0. This is to prevent them from being
	 * reused while some task is still using the block group after it was
	 * deleted - we want to make sure they can only be reused for new block
	 * groups after that task is done with the deleted block group.
	 */
	atomic_t frozen;

	/* For discard operations */
	struct list_head discard_list;
	int discard_index;
	u64 discard_eligible_time;
	u64 discard_cursor;
	enum btrfs_discard_state discard_state;

	/* For dirty block groups */
	struct list_head dirty_list;
	struct list_head io_list;

	struct btrfs_io_ctl io_ctl;

	/*
	 * Incremented when doing extent allocations and holding a read lock
	 * on the space_info's groups_sem semaphore.
	 * Decremented when an ordered extent that represents an IO against this
	 * block group's range is created (after it's added to its inode's
	 * root's list of ordered extents) or immediately after the allocation
	 * if it's a metadata extent or fallocate extent (for these cases we
	 * don't create ordered extents).
	 */
	atomic_t reservations;

	/*
	 * Incremented while holding the spinlock *lock* by a task checking if
	 * it can perform a nocow write (incremented if the value for the *ro*
	 * field is 0). Decremented by such tasks once they create an ordered
	 * extent or before that if some error happens before reaching that step.
	 * This is to prevent races between block group relocation and nocow
	 * writes through direct IO.
	 */
	atomic_t nocow_writers;

	/* Lock for free space tree operations. */
	struct mutex free_space_lock;

	/*
	 * Number of extents in this block group used for swap files.
	 * All accesses protected by the spinlock 'lock'.
	 */
	int swap_extents;

	/*
	 * Allocation offset for the block group to implement sequential
	 * allocation. This is used only on a zoned filesystem.
	 */
	u64 alloc_offset;
	u64 zone_unusable;
	u64 zone_capacity;
	u64 meta_write_pointer;
	struct map_lookup *physical_map;
	struct list_head active_bg_list;
	struct work_struct zone_finish_work;
	struct extent_buffer *last_eb;
	enum btrfs_block_group_size_class size_class;
};

static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
{
	return (block_group->start + block_group->length);
}

static inline bool btrfs_is_block_group_data_only(
					struct btrfs_block_group *block_group)
{
	/*
	 * In mixed mode the fragmentation is expected to be high, lowering the
	 * efficiency, so only proper data block groups are considered.
	 */
	return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
	       !(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
}

#ifdef CONFIG_BTRFS_DEBUG
int btrfs_should_fragment_free_space(struct btrfs_block_group *block_group);
#endif

struct btrfs_block_group *btrfs_lookup_first_block_group(
		struct btrfs_fs_info *info, u64 bytenr);
struct btrfs_block_group *btrfs_lookup_block_group(
		struct btrfs_fs_info *info, u64 bytenr);
struct btrfs_block_group *btrfs_next_block_group(
		struct btrfs_block_group *cache);
void btrfs_get_block_group(struct btrfs_block_group *cache);
void btrfs_put_block_group(struct btrfs_block_group *cache);
void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
					const u64 start);
void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
struct btrfs_block_group *btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info,
						  u64 bytenr);
void btrfs_dec_nocow_writers(struct btrfs_block_group *bg);
void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
				           u64 num_bytes);
int btrfs_cache_block_group(struct btrfs_block_group *cache, bool wait);
void btrfs_put_caching_control(struct btrfs_caching_control *ctl);
struct btrfs_caching_control *btrfs_get_caching_control(
		struct btrfs_block_group *cache);
u64 add_new_free_space(struct btrfs_block_group *block_group,
		       u64 start, u64 end);
struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
				struct btrfs_fs_info *fs_info,
				const u64 chunk_offset);
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     u64 group_start, struct extent_map *em);
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
void btrfs_reclaim_bgs_work(struct work_struct *work);
void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info);
void btrfs_mark_bg_to_reclaim(struct btrfs_block_group *bg);
int btrfs_read_block_groups(struct btrfs_fs_info *info);
struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *trans,
						 u64 type,
						 u64 chunk_offset, u64 size);
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
			     bool do_chunk_alloc);
void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
int btrfs_update_block_group(struct btrfs_trans_handle *trans,
			     u64 bytenr, u64 num_bytes, bool alloc);
int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
			     u64 ram_bytes, u64 num_bytes, int delalloc,
			     bool force_wrong_size_class);
void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
			       u64 num_bytes, int delalloc);
int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
		      enum btrfs_chunk_alloc_enum force);
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
				  bool is_item_insertion);
u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
		     u64 physical, u64 **logical, int *naddrs, int *stripe_len);

static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
{
	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
}

static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
{
	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
}

static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
{
	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
}

static inline int btrfs_block_group_done(struct btrfs_block_group *cache)
{
	smp_mb();
	return cache->cached == BTRFS_CACHE_FINISHED ||
		cache->cached == BTRFS_CACHE_ERROR;
}

void btrfs_freeze_block_group(struct btrfs_block_group *cache);
void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);

bool btrfs_inc_block_group_swap_extents(struct btrfs_block_group *bg);
void btrfs_dec_block_group_swap_extents(struct btrfs_block_group *bg, int amount);

enum btrfs_block_group_size_class btrfs_calc_block_group_size_class(u64 size);
int btrfs_use_block_group_size_class(struct btrfs_block_group *bg,
				     enum btrfs_block_group_size_class size_class,
				     bool force_wrong_size_class);
bool btrfs_block_group_should_use_size_class(struct btrfs_block_group *bg);

#endif /* BTRFS_BLOCK_GROUP_H */
Commit	Line	Data
aac0023c JB	1	/* SPDX-License-Identifier: GPL-2.0 */
	2
	3	#ifndef BTRFS_BLOCK_GROUP_H
	4	#define BTRFS_BLOCK_GROUP_H
	5
67b61aef DS	6	#include "free-space-cache.h"
67b61aef DS	7
aac0023c JB	8	enum btrfs_disk_cache_state {
	9	BTRFS_DC_WRITTEN,
	10	BTRFS_DC_ERROR,
	11	BTRFS_DC_CLEAR,
	12	BTRFS_DC_SETUP,
	13	};
	14
52bb7a21 BB	15	enum btrfs_block_group_size_class {
	16	/* Unset */
	17	BTRFS_BG_SZ_NONE,
	18	/* 0 < size <= 128K */
	19	BTRFS_BG_SZ_SMALL,
	20	/* 128K < size <= 8M */
	21	BTRFS_BG_SZ_MEDIUM,
	22	/* 8M < size < BG_LENGTH */
	23	BTRFS_BG_SZ_LARGE,
	24	};
	25
2bee7eb8 DZ	26	/*
	27	* This describes the state of the block_group for async discard. This is due
	28	* to the two pass nature of it where extent discarding is prioritized over
	29	* bitmap discarding. BTRFS_DISCARD_RESET_CURSOR is set when we are resetting
	30	* between lists to prevent contention for discard state variables
	31	* (eg. discard_cursor).
	32	*/
	33	enum btrfs_discard_state {
	34	BTRFS_DISCARD_EXTENTS,
	35	BTRFS_DISCARD_BITMAPS,
	36	BTRFS_DISCARD_RESET_CURSOR,
	37	};
	38
07730d87 JB	39	/*
	40	* Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to
	41	* only allocate a chunk if we really need one.
	42	*
	43	* CHUNK_ALLOC_LIMITED means to only try and allocate one if we have very few
	44	* chunks already allocated. This is used as part of the clustering code to
	45	* help make sure we have a good pool of storage to cluster in, without filling
	46	* the FS with empty chunks
	47	*
	48	* CHUNK_ALLOC_FORCE means it must try to allocate one
760e69c4 NA	49	*
	50	* CHUNK_ALLOC_FORCE_FOR_EXTENT like CHUNK_ALLOC_FORCE but called from
	51	* find_free_extent() that also activaes the zone
07730d87 JB	52	*/
	53	enum btrfs_chunk_alloc_enum {
	54	CHUNK_ALLOC_NO_FORCE,
	55	CHUNK_ALLOC_LIMITED,
	56	CHUNK_ALLOC_FORCE,
760e69c4	57	CHUNK_ALLOC_FORCE_FOR_EXTENT,
07730d87 JB	58	};
07730d87 JB	59
3349b57f JB	60	/* Block group flags set at runtime */
	61	enum btrfs_block_group_flags {
	62	BLOCK_GROUP_FLAG_IREF,
3349b57f JB	63	BLOCK_GROUP_FLAG_REMOVED,
	64	BLOCK_GROUP_FLAG_TO_COPY,
	65	BLOCK_GROUP_FLAG_RELOCATING_REPAIR,
	66	BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
	67	BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
	68	BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
0d7764ff DS	69	/* Does the block group need to be added to the free space tree? */
0d7764ff DS	70	BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
961f5b8b DS	71	/* Indicate that the block group is placed on a sequential zone */
961f5b8b DS	72	BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE,
3349b57f JB	73	};
3349b57f JB	74
16708a88 JB	75	enum btrfs_caching_type {
	76	BTRFS_CACHE_NO,
	77	BTRFS_CACHE_STARTED,
	78	BTRFS_CACHE_FINISHED,
	79	BTRFS_CACHE_ERROR,
	80	};
	81
aac0023c JB	82	struct btrfs_caching_control {
	83	struct list_head list;
	84	struct mutex mutex;
	85	wait_queue_head_t wait;
	86	struct btrfs_work work;
32da5386	87	struct btrfs_block_group *block_group;
aac0023c JB	88	refcount_t count;
	89	};
	90
	91	/* Once caching_thread() finds this much free space, it will wake up waiters. */
	92	#define CACHING_CTL_WAKE_UP SZ_2M
	93
32da5386	94	struct btrfs_block_group {
aac0023c JB	95	struct btrfs_fs_info *fs_info;
	96	struct inode *inode;
	97	spinlock_t lock;
b3470b5d DS	98	u64 start;
b3470b5d DS	99	u64 length;
aac0023c JB	100	u64 pinned;
aac0023c JB	101	u64 reserved;
bf38be65	102	u64 used;
aac0023c JB	103	u64 delalloc_bytes;
	104	u64 bytes_super;
	105	u64 flags;
	106	u64 cache_generation;
f7238e50	107	u64 global_root_id;
aac0023c	108
7248e0ce QW	109	/*
	110	* The last committed used bytes of this block group, if the above @used
	111	* is still the same as @commit_used, we don't need to update block
	112	* group item of this block group.
	113	*/
	114	u64 commit_used;
aac0023c JB	115	/*
	116	* If the free space extent count exceeds this number, convert the block
	117	* group to bitmaps.
	118	*/
	119	u32 bitmap_high_thresh;
	120
	121	/*
	122	* If the free space extent count drops below this number, convert the
	123	* block group back to extents.
	124	*/
	125	u32 bitmap_low_thresh;
	126
	127	/*
	128	* It is just used for the delayed data space allocation because
	129	* only the data space allocation and the relative metadata update
	130	* can be done cross the transaction.
	131	*/
	132	struct rw_semaphore data_rwsem;
	133
	134	/* For raid56, this is a full stripe, without parity */
	135	unsigned long full_stripe_len;
3349b57f	136	unsigned long runtime_flags;
aac0023c JB	137
aac0023c JB	138	unsigned int ro;
aac0023c JB	139
	140	int disk_cache_state;
	141
	142	/* Cache tracking stuff */
	143	int cached;
	144	struct btrfs_caching_control *caching_ctl;
aac0023c JB	145
	146	struct btrfs_space_info *space_info;
	147
	148	/* Free space cache stuff */
	149	struct btrfs_free_space_ctl *free_space_ctl;
	150
	151	/* Block group cache stuff */
	152	struct rb_node cache_node;
	153
	154	/* For block groups in the same raid type */
	155	struct list_head list;
	156
48aaeebe	157	refcount_t refs;
aac0023c JB	158
	159	/*
	160	* List of struct btrfs_free_clusters for this block group.
	161	* Today it will only have one thing on it, but that may change
	162	*/
	163	struct list_head cluster_list;
	164
aadb164b FM	165	/*
	166	* Used for several lists:
	167	*
	168	* 1) struct btrfs_fs_info::unused_bgs
	169	* 2) struct btrfs_fs_info::reclaim_bgs
	170	* 3) struct btrfs_transaction::deleted_bgs
	171	* 4) struct btrfs_trans_handle::new_bgs
	172	*/
aac0023c JB	173	struct list_head bg_list;
	174
	175	/* For read-only block groups */
	176	struct list_head ro_list;
	177
6b7304af FM	178	/*
	179	* When non-zero it means the block group's logical address and its
	180	* device extents can not be reused for future block group allocations
	181	* until the counter goes down to 0. This is to prevent them from being
	182	* reused while some task is still using the block group after it was
	183	* deleted - we want to make sure they can only be reused for new block
	184	* groups after that task is done with the deleted block group.
	185	*/
	186	atomic_t frozen;
	187
b0643e59	188	/* For discard operations */
b0643e59 DZ	189	struct list_head discard_list;
	190	int discard_index;
	191	u64 discard_eligible_time;
2bee7eb8 DZ	192	u64 discard_cursor;
2bee7eb8 DZ	193	enum btrfs_discard_state discard_state;
aac0023c JB	194
	195	/* For dirty block groups */
	196	struct list_head dirty_list;
	197	struct list_head io_list;
	198
	199	struct btrfs_io_ctl io_ctl;
	200
	201	/*
	202	* Incremented when doing extent allocations and holding a read lock
	203	* on the space_info's groups_sem semaphore.
	204	* Decremented when an ordered extent that represents an IO against this
	205	* block group's range is created (after it's added to its inode's
	206	* root's list of ordered extents) or immediately after the allocation
	207	* if it's a metadata extent or fallocate extent (for these cases we
	208	* don't create ordered extents).
	209	*/
	210	atomic_t reservations;
	211
	212	/*
	213	* Incremented while holding the spinlock lock by a task checking if
	214	* it can perform a nocow write (incremented if the value for the ro
	215	* field is 0). Decremented by such tasks once they create an ordered
	216	* extent or before that if some error happens before reaching that step.
	217	* This is to prevent races between block group relocation and nocow
	218	* writes through direct IO.
	219	*/
	220	atomic_t nocow_writers;
	221
	222	/* Lock for free space tree operations. */
	223	struct mutex free_space_lock;
	224
195a49ea FM	225	/*
	226	* Number of extents in this block group used for swap files.
	227	* All accesses protected by the spinlock 'lock'.
	228	*/
	229	int swap_extents;
	230
08e11a3d NA	231	/*
	232	* Allocation offset for the block group to implement sequential
	233	* allocation. This is used only on a zoned filesystem.
	234	*/
	235	u64 alloc_offset;
169e0da9	236	u64 zone_unusable;
8eae532b	237	u64 zone_capacity;
0bc09ca1	238	u64 meta_write_pointer;
dafc340d	239	struct map_lookup *physical_map;
afba2bc0	240	struct list_head active_bg_list;
56fbb0a4 NA	241	struct work_struct zone_finish_work;
56fbb0a4 NA	242	struct extent_buffer *last_eb;
52bb7a21	243	enum btrfs_block_group_size_class size_class;
aac0023c JB	244	};
aac0023c JB	245
b0643e59 DZ	246	static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
	247	{
	248	return (block_group->start + block_group->length);
	249	}
	250
5cb0724e DZ	251	static inline bool btrfs_is_block_group_data_only(
	252	struct btrfs_block_group *block_group)
	253	{
	254	/*
	255	* In mixed mode the fragmentation is expected to be high, lowering the
	256	* efficiency, so only proper data block groups are considered.
	257	*/
	258	return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
	259	!(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
	260	}
	261
aac0023c	262	#ifdef CONFIG_BTRFS_DEBUG
06d61cb1	263	int btrfs_should_fragment_free_space(struct btrfs_block_group *block_group);
aac0023c JB	264	#endif
aac0023c JB	265
32da5386	266	struct btrfs_block_group *btrfs_lookup_first_block_group(
2e405ad8	267	struct btrfs_fs_info *info, u64 bytenr);
32da5386	268	struct btrfs_block_group *btrfs_lookup_block_group(
2e405ad8	269	struct btrfs_fs_info *info, u64 bytenr);
32da5386 DS	270	struct btrfs_block_group *btrfs_next_block_group(
	271	struct btrfs_block_group *cache);
	272	void btrfs_get_block_group(struct btrfs_block_group *cache);
	273	void btrfs_put_block_group(struct btrfs_block_group *cache);
3eeb3226 JB	274	void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
3eeb3226 JB	275	const u64 start);
32da5386	276	void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
2306e83e FM	277	struct btrfs_block_group btrfs_inc_nocow_writers(struct btrfs_fs_info fs_info,
	278	u64 bytenr);
	279	void btrfs_dec_nocow_writers(struct btrfs_block_group *bg);
32da5386 DS	280	void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
32da5386 DS	281	void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
676f1f75	282	u64 num_bytes);
ced8ecf0	283	int btrfs_cache_block_group(struct btrfs_block_group *cache, bool wait);
e3cb339f JB	284	void btrfs_put_caching_control(struct btrfs_caching_control *ctl);
e3cb339f JB	285	struct btrfs_caching_control *btrfs_get_caching_control(
32da5386 DS	286	struct btrfs_block_group *cache);
32da5386 DS	287	u64 add_new_free_space(struct btrfs_block_group *block_group,
9f21246d	288	u64 start, u64 end);
e3e0520b JB	289	struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
	290	struct btrfs_fs_info *fs_info,
	291	const u64 chunk_offset);
	292	int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
	293	u64 group_start, struct extent_map *em);
	294	void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
32da5386	295	void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
18bb8bbf JT	296	void btrfs_reclaim_bgs_work(struct work_struct *work);
	297	void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info);
	298	void btrfs_mark_bg_to_reclaim(struct btrfs_block_group *bg);
4358d963	299	int btrfs_read_block_groups(struct btrfs_fs_info *info);
79bd3712	300	struct btrfs_block_group btrfs_make_block_group(struct btrfs_trans_handle trans,
5758d1bd	301	u64 type,
79bd3712	302	u64 chunk_offset, u64 size);
4358d963	303	void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
b12de528 QW	304	int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
b12de528 QW	305	bool do_chunk_alloc);
32da5386	306	void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
77745c05 JB	307	int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
	308	int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
	309	int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
ade4b516	310	int btrfs_update_block_group(struct btrfs_trans_handle *trans,
11b66fa6	311	u64 bytenr, u64 num_bytes, bool alloc);
32da5386	312	int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
52bb7a21 BB	313	u64 ram_bytes, u64 num_bytes, int delalloc,
52bb7a21 BB	314	bool force_wrong_size_class);
32da5386	315	void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	316	u64 num_bytes, int delalloc);
07730d87 JB	317	int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
	318	enum btrfs_chunk_alloc_enum force);
	319	int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
	320	void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2bb2e00e FM	321	void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
2bb2e00e FM	322	bool is_item_insertion);
878d7b67	323	u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
3e43c279 JB	324	void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3e43c279 JB	325	int btrfs_free_block_groups(struct btrfs_fs_info *info);
138082f3	326	int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
1eb82ef8	327	u64 physical, u64 *logical, int naddrs, int *stripe_len);
878d7b67 JB	328
	329	static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
	330	{
	331	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
	332	}
	333
	334	static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
	335	{
	336	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
	337	}
	338
	339	static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
	340	{
	341	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
	342	}
676f1f75	343
32da5386	344	static inline int btrfs_block_group_done(struct btrfs_block_group *cache)
676f1f75 JB	345	{
	346	smp_mb();
	347	return cache->cached == BTRFS_CACHE_FINISHED \|\|
	348	cache->cached == BTRFS_CACHE_ERROR;
	349	}
2e405ad8	350
684b752b FM	351	void btrfs_freeze_block_group(struct btrfs_block_group *cache);
	352	void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);
	353
195a49ea FM	354	bool btrfs_inc_block_group_swap_extents(struct btrfs_block_group *bg);
	355	void btrfs_dec_block_group_swap_extents(struct btrfs_block_group *bg, int amount);
	356
52bb7a21 BB	357	enum btrfs_block_group_size_class btrfs_calc_block_group_size_class(u64 size);
	358	int btrfs_use_block_group_size_class(struct btrfs_block_group *bg,
	359	enum btrfs_block_group_size_class size_class,
	360	bool force_wrong_size_class);
cb0922f2	361	bool btrfs_block_group_should_use_size_class(struct btrfs_block_group *bg);
52bb7a21	362
aac0023c	363	#endif /* BTRFS_BLOCK_GROUP_H */