[linux-2.6-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
 */
enum btrfs_chunk_alloc_enum {
	CHUNK_ALLOC_NO_FORCE,
	CHUNK_ALLOC_LIMITED,
	CHUNK_ALLOC_FORCE,
};

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;
	u64 progress;
	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;

	/*
	 * 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 int ro;
	unsigned int iref:1;
	unsigned int has_caching_ctl:1;
	unsigned int removed:1;
	unsigned int to_copy:1;
	unsigned int relocating_repair:1;

	int disk_cache_state;

	/* Cache tracking stuff */
	int cached;
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;

	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 meta_write_pointer;
};

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);
bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
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_wait_block_group_cache_done(struct btrfs_block_group *cache);
int btrfs_cache_block_group(struct btrfs_block_group *cache,
			    int load_cache_only);
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);
int 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, int 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);
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);
void btrfs_wait_space_cache_v1_finished(struct btrfs_block_group *cache,
				struct btrfs_caching_control *caching_ctl);
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
	38	*/
	39	enum btrfs_chunk_alloc_enum {
	40	CHUNK_ALLOC_NO_FORCE,
	41	CHUNK_ALLOC_LIMITED,
	42	CHUNK_ALLOC_FORCE,
	43	};
	44
aac0023c JB	45	struct btrfs_caching_control {
	46	struct list_head list;
	47	struct mutex mutex;
	48	wait_queue_head_t wait;
	49	struct btrfs_work work;
32da5386	50	struct btrfs_block_group *block_group;
aac0023c JB	51	u64 progress;
	52	refcount_t count;
	53	};
	54
	55	/* Once caching_thread() finds this much free space, it will wake up waiters. */
	56	#define CACHING_CTL_WAKE_UP SZ_2M
	57
32da5386	58	struct btrfs_block_group {
aac0023c JB	59	struct btrfs_fs_info *fs_info;
	60	struct inode *inode;
	61	spinlock_t lock;
b3470b5d DS	62	u64 start;
b3470b5d DS	63	u64 length;
aac0023c JB	64	u64 pinned;
aac0023c JB	65	u64 reserved;
bf38be65	66	u64 used;
aac0023c JB	67	u64 delalloc_bytes;
	68	u64 bytes_super;
	69	u64 flags;
	70	u64 cache_generation;
	71
	72	/*
	73	* If the free space extent count exceeds this number, convert the block
	74	* group to bitmaps.
	75	*/
	76	u32 bitmap_high_thresh;
	77
	78	/*
	79	* If the free space extent count drops below this number, convert the
	80	* block group back to extents.
	81	*/
	82	u32 bitmap_low_thresh;
	83
	84	/*
	85	* It is just used for the delayed data space allocation because
	86	* only the data space allocation and the relative metadata update
	87	* can be done cross the transaction.
	88	*/
	89	struct rw_semaphore data_rwsem;
	90
	91	/* For raid56, this is a full stripe, without parity */
	92	unsigned long full_stripe_len;
	93
	94	unsigned int ro;
	95	unsigned int iref:1;
	96	unsigned int has_caching_ctl:1;
	97	unsigned int removed:1;
78ce9fc2	98	unsigned int to_copy:1;
f7ef5287	99	unsigned int relocating_repair:1;
aac0023c JB	100
	101	int disk_cache_state;
	102
	103	/* Cache tracking stuff */
	104	int cached;
	105	struct btrfs_caching_control *caching_ctl;
	106	u64 last_byte_to_unpin;
	107
	108	struct btrfs_space_info *space_info;
	109
	110	/* Free space cache stuff */
	111	struct btrfs_free_space_ctl *free_space_ctl;
	112
	113	/* Block group cache stuff */
	114	struct rb_node cache_node;
	115
	116	/* For block groups in the same raid type */
	117	struct list_head list;
	118
48aaeebe	119	refcount_t refs;
aac0023c JB	120
	121	/*
	122	* List of struct btrfs_free_clusters for this block group.
	123	* Today it will only have one thing on it, but that may change
	124	*/
	125	struct list_head cluster_list;
	126
	127	/* For delayed block group creation or deletion of empty block groups */
	128	struct list_head bg_list;
	129
	130	/* For read-only block groups */
	131	struct list_head ro_list;
	132
6b7304af FM	133	/*
	134	* When non-zero it means the block group's logical address and its
	135	* device extents can not be reused for future block group allocations
	136	* until the counter goes down to 0. This is to prevent them from being
	137	* reused while some task is still using the block group after it was
	138	* deleted - we want to make sure they can only be reused for new block
	139	* groups after that task is done with the deleted block group.
	140	*/
	141	atomic_t frozen;
	142
b0643e59	143	/* For discard operations */
b0643e59 DZ	144	struct list_head discard_list;
	145	int discard_index;
	146	u64 discard_eligible_time;
2bee7eb8 DZ	147	u64 discard_cursor;
2bee7eb8 DZ	148	enum btrfs_discard_state discard_state;
aac0023c JB	149
	150	/* For dirty block groups */
	151	struct list_head dirty_list;
	152	struct list_head io_list;
	153
	154	struct btrfs_io_ctl io_ctl;
	155
	156	/*
	157	* Incremented when doing extent allocations and holding a read lock
	158	* on the space_info's groups_sem semaphore.
	159	* Decremented when an ordered extent that represents an IO against this
	160	* block group's range is created (after it's added to its inode's
	161	* root's list of ordered extents) or immediately after the allocation
	162	* if it's a metadata extent or fallocate extent (for these cases we
	163	* don't create ordered extents).
	164	*/
	165	atomic_t reservations;
	166
	167	/*
	168	* Incremented while holding the spinlock lock by a task checking if
	169	* it can perform a nocow write (incremented if the value for the ro
	170	* field is 0). Decremented by such tasks once they create an ordered
	171	* extent or before that if some error happens before reaching that step.
	172	* This is to prevent races between block group relocation and nocow
	173	* writes through direct IO.
	174	*/
	175	atomic_t nocow_writers;
	176
	177	/* Lock for free space tree operations. */
	178	struct mutex free_space_lock;
	179
	180	/*
	181	* Does the block group need to be added to the free space tree?
	182	* Protected by free_space_lock.
	183	*/
	184	int needs_free_space;
	185
08f45559 JT	186	/* Flag indicating this block group is placed on a sequential zone */
	187	bool seq_zone;
	188
195a49ea FM	189	/*
	190	* Number of extents in this block group used for swap files.
	191	* All accesses protected by the spinlock 'lock'.
	192	*/
	193	int swap_extents;
	194
aac0023c JB	195	/* Record locked full stripes for RAID5/6 block group */
aac0023c JB	196	struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
08e11a3d NA	197
	198	/*
	199	* Allocation offset for the block group to implement sequential
	200	* allocation. This is used only on a zoned filesystem.
	201	*/
	202	u64 alloc_offset;
169e0da9	203	u64 zone_unusable;
0bc09ca1	204	u64 meta_write_pointer;
aac0023c JB	205	};
aac0023c JB	206
b0643e59 DZ	207	static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
	208	{
	209	return (block_group->start + block_group->length);
	210	}
	211
5cb0724e DZ	212	static inline bool btrfs_is_block_group_data_only(
	213	struct btrfs_block_group *block_group)
	214	{
	215	/*
	216	* In mixed mode the fragmentation is expected to be high, lowering the
	217	* efficiency, so only proper data block groups are considered.
	218	*/
	219	return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
	220	!(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
	221	}
	222
aac0023c JB	223	#ifdef CONFIG_BTRFS_DEBUG
aac0023c JB	224	static inline int btrfs_should_fragment_free_space(
32da5386	225	struct btrfs_block_group *block_group)
aac0023c JB	226	{
	227	struct btrfs_fs_info *fs_info = block_group->fs_info;
	228
	229	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
	230	block_group->flags & BTRFS_BLOCK_GROUP_METADATA) \|\|
	231	(btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
	232	block_group->flags & BTRFS_BLOCK_GROUP_DATA);
	233	}
	234	#endif
	235
32da5386	236	struct btrfs_block_group *btrfs_lookup_first_block_group(
2e405ad8	237	struct btrfs_fs_info *info, u64 bytenr);
32da5386	238	struct btrfs_block_group *btrfs_lookup_block_group(
2e405ad8	239	struct btrfs_fs_info *info, u64 bytenr);
32da5386 DS	240	struct btrfs_block_group *btrfs_next_block_group(
	241	struct btrfs_block_group *cache);
	242	void btrfs_get_block_group(struct btrfs_block_group *cache);
	243	void btrfs_put_block_group(struct btrfs_block_group *cache);
3eeb3226 JB	244	void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
3eeb3226 JB	245	const u64 start);
32da5386	246	void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
3eeb3226 JB	247	bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
3eeb3226 JB	248	void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
32da5386 DS	249	void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
32da5386 DS	250	void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
676f1f75	251	u64 num_bytes);
32da5386 DS	252	int btrfs_wait_block_group_cache_done(struct btrfs_block_group *cache);
32da5386 DS	253	int btrfs_cache_block_group(struct btrfs_block_group *cache,
676f1f75	254	int load_cache_only);
e3cb339f JB	255	void btrfs_put_caching_control(struct btrfs_caching_control *ctl);
e3cb339f JB	256	struct btrfs_caching_control *btrfs_get_caching_control(
32da5386 DS	257	struct btrfs_block_group *cache);
32da5386 DS	258	u64 add_new_free_space(struct btrfs_block_group *block_group,
9f21246d	259	u64 start, u64 end);
e3e0520b JB	260	struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
	261	struct btrfs_fs_info *fs_info,
	262	const u64 chunk_offset);
	263	int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
	264	u64 group_start, struct extent_map *em);
	265	void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
32da5386	266	void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
18bb8bbf JT	267	void btrfs_reclaim_bgs_work(struct work_struct *work);
	268	void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info);
	269	void btrfs_mark_bg_to_reclaim(struct btrfs_block_group *bg);
4358d963 JB	270	int btrfs_read_block_groups(struct btrfs_fs_info *info);
	271	int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
	272	u64 type, u64 chunk_offset, u64 size);
	273	void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
b12de528 QW	274	int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
b12de528 QW	275	bool do_chunk_alloc);
32da5386	276	void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
77745c05 JB	277	int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
	278	int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
	279	int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
ade4b516 JB	280	int btrfs_update_block_group(struct btrfs_trans_handle *trans,
ade4b516 JB	281	u64 bytenr, u64 num_bytes, int alloc);
32da5386	282	int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	283	u64 ram_bytes, u64 num_bytes, int delalloc);
32da5386	284	void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	285	u64 num_bytes, int delalloc);
07730d87 JB	286	int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
	287	enum btrfs_chunk_alloc_enum force);
	288	int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
	289	void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
878d7b67	290	u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
3e43c279 JB	291	void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3e43c279 JB	292	int btrfs_free_block_groups(struct btrfs_fs_info *info);
e747853c JB	293	void btrfs_wait_space_cache_v1_finished(struct btrfs_block_group *cache,
e747853c JB	294	struct btrfs_caching_control *caching_ctl);
138082f3 NA	295	int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
	296	struct block_device bdev, u64 physical, u64 *logical,
	297	int naddrs, int stripe_len);
878d7b67 JB	298
	299	static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
	300	{
	301	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
	302	}
	303
	304	static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
	305	{
	306	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
	307	}
	308
	309	static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
	310	{
	311	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
	312	}
676f1f75	313
32da5386	314	static inline int btrfs_block_group_done(struct btrfs_block_group *cache)
676f1f75 JB	315	{
	316	smp_mb();
	317	return cache->cached == BTRFS_CACHE_FINISHED \|\|
	318	cache->cached == BTRFS_CACHE_ERROR;
	319	}
2e405ad8	320
684b752b FM	321	void btrfs_freeze_block_group(struct btrfs_block_group *cache);
	322	void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);
	323
195a49ea FM	324	bool btrfs_inc_block_group_swap_extents(struct btrfs_block_group *bg);
	325	void btrfs_dec_block_group_swap_extents(struct btrfs_block_group *bg, int amount);
	326
aac0023c	327	#endif /* BTRFS_BLOCK_GROUP_H */