[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,
};

/*
 * 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,
};

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

/*
 * Tree to record all locked full stripes of a RAID5/6 block group
 */
struct btrfs_full_stripe_locks_tree {
	struct rb_root root;
	struct mutex lock;
};

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;

	/*
	 * 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;

	/* For delayed block group creation or deletion of empty block groups */
	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;

	/*
	 * Does the block group need to be added to the free space tree?
	 * Protected by free_space_lock.
	 */
	int needs_free_space;

	/* Flag indicating this block group is placed on a sequential zone */
	bool seq_zone;

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

	/* Record locked full stripes for RAID5/6 block group */
	struct btrfs_full_stripe_locks_tree full_stripe_locks_root;

	/*
	 * 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;
};

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
static inline int btrfs_should_fragment_free_space(
		struct btrfs_block_group *block_group)
{
	struct btrfs_fs_info *fs_info = block_group->fs_info;

	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
	       (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
}
#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 bytes_used, 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);
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,
		       struct block_device *bdev, 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);

#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
2bee7eb8 DZ	15	/*
	16	* This describes the state of the block_group for async discard. This is due
	17	* to the two pass nature of it where extent discarding is prioritized over
	18	* bitmap discarding. BTRFS_DISCARD_RESET_CURSOR is set when we are resetting
	19	* between lists to prevent contention for discard state variables
	20	* (eg. discard_cursor).
	21	*/
	22	enum btrfs_discard_state {
	23	BTRFS_DISCARD_EXTENTS,
	24	BTRFS_DISCARD_BITMAPS,
	25	BTRFS_DISCARD_RESET_CURSOR,
	26	};
	27
07730d87 JB	28	/*
	29	* Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to
	30	* only allocate a chunk if we really need one.
	31	*
	32	* CHUNK_ALLOC_LIMITED means to only try and allocate one if we have very few
	33	* chunks already allocated. This is used as part of the clustering code to
	34	* help make sure we have a good pool of storage to cluster in, without filling
	35	* the FS with empty chunks
	36	*
	37	* CHUNK_ALLOC_FORCE means it must try to allocate one
760e69c4 NA	38	*
	39	* CHUNK_ALLOC_FORCE_FOR_EXTENT like CHUNK_ALLOC_FORCE but called from
	40	* find_free_extent() that also activaes the zone
07730d87 JB	41	*/
	42	enum btrfs_chunk_alloc_enum {
	43	CHUNK_ALLOC_NO_FORCE,
	44	CHUNK_ALLOC_LIMITED,
	45	CHUNK_ALLOC_FORCE,
760e69c4	46	CHUNK_ALLOC_FORCE_FOR_EXTENT,
07730d87 JB	47	};
07730d87 JB	48
3349b57f JB	49	/* Block group flags set at runtime */
	50	enum btrfs_block_group_flags {
	51	BLOCK_GROUP_FLAG_IREF,
3349b57f JB	52	BLOCK_GROUP_FLAG_REMOVED,
	53	BLOCK_GROUP_FLAG_TO_COPY,
	54	BLOCK_GROUP_FLAG_RELOCATING_REPAIR,
	55	BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
	56	BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
	57	BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
	58	};
	59
16708a88 JB	60	enum btrfs_caching_type {
	61	BTRFS_CACHE_NO,
	62	BTRFS_CACHE_STARTED,
	63	BTRFS_CACHE_FINISHED,
	64	BTRFS_CACHE_ERROR,
	65	};
	66
aac0023c JB	67	struct btrfs_caching_control {
	68	struct list_head list;
	69	struct mutex mutex;
	70	wait_queue_head_t wait;
	71	struct btrfs_work work;
32da5386	72	struct btrfs_block_group *block_group;
aac0023c JB	73	refcount_t count;
	74	};
	75
	76	/* Once caching_thread() finds this much free space, it will wake up waiters. */
	77	#define CACHING_CTL_WAKE_UP SZ_2M
	78
c29abab4 JB	79	/*
	80	* Tree to record all locked full stripes of a RAID5/6 block group
	81	*/
	82	struct btrfs_full_stripe_locks_tree {
	83	struct rb_root root;
	84	struct mutex lock;
	85	};
	86
32da5386	87	struct btrfs_block_group {
aac0023c JB	88	struct btrfs_fs_info *fs_info;
	89	struct inode *inode;
	90	spinlock_t lock;
b3470b5d DS	91	u64 start;
b3470b5d DS	92	u64 length;
aac0023c JB	93	u64 pinned;
aac0023c JB	94	u64 reserved;
bf38be65	95	u64 used;
aac0023c JB	96	u64 delalloc_bytes;
	97	u64 bytes_super;
	98	u64 flags;
	99	u64 cache_generation;
f7238e50	100	u64 global_root_id;
aac0023c JB	101
	102	/*
	103	* If the free space extent count exceeds this number, convert the block
	104	* group to bitmaps.
	105	*/
	106	u32 bitmap_high_thresh;
	107
	108	/*
	109	* If the free space extent count drops below this number, convert the
	110	* block group back to extents.
	111	*/
	112	u32 bitmap_low_thresh;
	113
	114	/*
	115	* It is just used for the delayed data space allocation because
	116	* only the data space allocation and the relative metadata update
	117	* can be done cross the transaction.
	118	*/
	119	struct rw_semaphore data_rwsem;
	120
	121	/* For raid56, this is a full stripe, without parity */
	122	unsigned long full_stripe_len;
3349b57f	123	unsigned long runtime_flags;
aac0023c JB	124
aac0023c JB	125	unsigned int ro;
aac0023c JB	126
	127	int disk_cache_state;
	128
	129	/* Cache tracking stuff */
	130	int cached;
	131	struct btrfs_caching_control *caching_ctl;
aac0023c JB	132
	133	struct btrfs_space_info *space_info;
	134
	135	/* Free space cache stuff */
	136	struct btrfs_free_space_ctl *free_space_ctl;
	137
	138	/* Block group cache stuff */
	139	struct rb_node cache_node;
	140
	141	/* For block groups in the same raid type */
	142	struct list_head list;
	143
48aaeebe	144	refcount_t refs;
aac0023c JB	145
	146	/*
	147	* List of struct btrfs_free_clusters for this block group.
	148	* Today it will only have one thing on it, but that may change
	149	*/
	150	struct list_head cluster_list;
	151
	152	/* For delayed block group creation or deletion of empty block groups */
	153	struct list_head bg_list;
	154
	155	/* For read-only block groups */
	156	struct list_head ro_list;
	157
6b7304af FM	158	/*
	159	* When non-zero it means the block group's logical address and its
	160	* device extents can not be reused for future block group allocations
	161	* until the counter goes down to 0. This is to prevent them from being
	162	* reused while some task is still using the block group after it was
	163	* deleted - we want to make sure they can only be reused for new block
	164	* groups after that task is done with the deleted block group.
	165	*/
	166	atomic_t frozen;
	167
b0643e59	168	/* For discard operations */
b0643e59 DZ	169	struct list_head discard_list;
	170	int discard_index;
	171	u64 discard_eligible_time;
2bee7eb8 DZ	172	u64 discard_cursor;
2bee7eb8 DZ	173	enum btrfs_discard_state discard_state;
aac0023c JB	174
	175	/* For dirty block groups */
	176	struct list_head dirty_list;
	177	struct list_head io_list;
	178
	179	struct btrfs_io_ctl io_ctl;
	180
	181	/*
	182	* Incremented when doing extent allocations and holding a read lock
	183	* on the space_info's groups_sem semaphore.
	184	* Decremented when an ordered extent that represents an IO against this
	185	* block group's range is created (after it's added to its inode's
	186	* root's list of ordered extents) or immediately after the allocation
	187	* if it's a metadata extent or fallocate extent (for these cases we
	188	* don't create ordered extents).
	189	*/
	190	atomic_t reservations;
	191
	192	/*
	193	* Incremented while holding the spinlock lock by a task checking if
	194	* it can perform a nocow write (incremented if the value for the ro
	195	* field is 0). Decremented by such tasks once they create an ordered
	196	* extent or before that if some error happens before reaching that step.
	197	* This is to prevent races between block group relocation and nocow
	198	* writes through direct IO.
	199	*/
	200	atomic_t nocow_writers;
	201
	202	/* Lock for free space tree operations. */
	203	struct mutex free_space_lock;
	204
	205	/*
	206	* Does the block group need to be added to the free space tree?
	207	* Protected by free_space_lock.
	208	*/
	209	int needs_free_space;
	210
08f45559 JT	211	/* Flag indicating this block group is placed on a sequential zone */
	212	bool seq_zone;
	213
195a49ea FM	214	/*
	215	* Number of extents in this block group used for swap files.
	216	* All accesses protected by the spinlock 'lock'.
	217	*/
	218	int swap_extents;
	219
aac0023c JB	220	/* Record locked full stripes for RAID5/6 block group */
aac0023c JB	221	struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
08e11a3d NA	222
	223	/*
	224	* Allocation offset for the block group to implement sequential
	225	* allocation. This is used only on a zoned filesystem.
	226	*/
	227	u64 alloc_offset;
169e0da9	228	u64 zone_unusable;
8eae532b	229	u64 zone_capacity;
0bc09ca1	230	u64 meta_write_pointer;
dafc340d	231	struct map_lookup *physical_map;
afba2bc0	232	struct list_head active_bg_list;
56fbb0a4 NA	233	struct work_struct zone_finish_work;
56fbb0a4 NA	234	struct extent_buffer *last_eb;
aac0023c JB	235	};
aac0023c JB	236
b0643e59 DZ	237	static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
	238	{
	239	return (block_group->start + block_group->length);
	240	}
	241
5cb0724e DZ	242	static inline bool btrfs_is_block_group_data_only(
	243	struct btrfs_block_group *block_group)
	244	{
	245	/*
	246	* In mixed mode the fragmentation is expected to be high, lowering the
	247	* efficiency, so only proper data block groups are considered.
	248	*/
	249	return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
	250	!(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
	251	}
	252
aac0023c JB	253	#ifdef CONFIG_BTRFS_DEBUG
aac0023c JB	254	static inline int btrfs_should_fragment_free_space(
32da5386	255	struct btrfs_block_group *block_group)
aac0023c JB	256	{
	257	struct btrfs_fs_info *fs_info = block_group->fs_info;
	258
	259	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
	260	block_group->flags & BTRFS_BLOCK_GROUP_METADATA) \|\|
	261	(btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
	262	block_group->flags & BTRFS_BLOCK_GROUP_DATA);
	263	}
	264	#endif
	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 FM	300	struct btrfs_block_group btrfs_make_block_group(struct btrfs_trans_handle trans,
	301	u64 bytes_used, u64 type,
	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,
ade4b516	313	u64 ram_bytes, u64 num_bytes, int delalloc);
32da5386	314	void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	315	u64 num_bytes, int delalloc);
07730d87 JB	316	int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
	317	enum btrfs_chunk_alloc_enum force);
	318	int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
	319	void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2bb2e00e FM	320	void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
2bb2e00e FM	321	bool is_item_insertion);
878d7b67	322	u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
3e43c279 JB	323	void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3e43c279 JB	324	int btrfs_free_block_groups(struct btrfs_fs_info *info);
138082f3 NA	325	int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
	326	struct block_device bdev, u64 physical, u64 *logical,
	327	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
aac0023c	357	#endif /* BTRFS_BLOCK_GROUP_H */