[mirror_ubuntu-hirsute-kernel.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;

	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;

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

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);
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);

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);

#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
		     u64 physical, u64 **logical, int *naddrs, int *stripe_len);
#endif

#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;
	98
	99	int disk_cache_state;
	100
	101	/* Cache tracking stuff */
	102	int cached;
	103	struct btrfs_caching_control *caching_ctl;
	104	u64 last_byte_to_unpin;
	105
	106	struct btrfs_space_info *space_info;
	107
	108	/* Free space cache stuff */
	109	struct btrfs_free_space_ctl *free_space_ctl;
	110
	111	/* Block group cache stuff */
	112	struct rb_node cache_node;
	113
	114	/* For block groups in the same raid type */
	115	struct list_head list;
	116
48aaeebe	117	refcount_t refs;
aac0023c JB	118
	119	/*
	120	* List of struct btrfs_free_clusters for this block group.
	121	* Today it will only have one thing on it, but that may change
	122	*/
	123	struct list_head cluster_list;
	124
	125	/* For delayed block group creation or deletion of empty block groups */
	126	struct list_head bg_list;
	127
	128	/* For read-only block groups */
	129	struct list_head ro_list;
	130
6b7304af FM	131	/*
	132	* When non-zero it means the block group's logical address and its
	133	* device extents can not be reused for future block group allocations
	134	* until the counter goes down to 0. This is to prevent them from being
	135	* reused while some task is still using the block group after it was
	136	* deleted - we want to make sure they can only be reused for new block
	137	* groups after that task is done with the deleted block group.
	138	*/
	139	atomic_t frozen;
	140
b0643e59	141	/* For discard operations */
b0643e59 DZ	142	struct list_head discard_list;
	143	int discard_index;
	144	u64 discard_eligible_time;
2bee7eb8 DZ	145	u64 discard_cursor;
2bee7eb8 DZ	146	enum btrfs_discard_state discard_state;
aac0023c JB	147
	148	/* For dirty block groups */
	149	struct list_head dirty_list;
	150	struct list_head io_list;
	151
	152	struct btrfs_io_ctl io_ctl;
	153
	154	/*
	155	* Incremented when doing extent allocations and holding a read lock
	156	* on the space_info's groups_sem semaphore.
	157	* Decremented when an ordered extent that represents an IO against this
	158	* block group's range is created (after it's added to its inode's
	159	* root's list of ordered extents) or immediately after the allocation
	160	* if it's a metadata extent or fallocate extent (for these cases we
	161	* don't create ordered extents).
	162	*/
	163	atomic_t reservations;
	164
	165	/*
	166	* Incremented while holding the spinlock lock by a task checking if
	167	* it can perform a nocow write (incremented if the value for the ro
	168	* field is 0). Decremented by such tasks once they create an ordered
	169	* extent or before that if some error happens before reaching that step.
	170	* This is to prevent races between block group relocation and nocow
	171	* writes through direct IO.
	172	*/
	173	atomic_t nocow_writers;
	174
	175	/* Lock for free space tree operations. */
	176	struct mutex free_space_lock;
	177
	178	/*
	179	* Does the block group need to be added to the free space tree?
	180	* Protected by free_space_lock.
	181	*/
	182	int needs_free_space;
	183
	184	/* Record locked full stripes for RAID5/6 block group */
	185	struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
	186	};
	187
b0643e59 DZ	188	static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
	189	{
	190	return (block_group->start + block_group->length);
	191	}
	192
5cb0724e DZ	193	static inline bool btrfs_is_block_group_data_only(
	194	struct btrfs_block_group *block_group)
	195	{
	196	/*
	197	* In mixed mode the fragmentation is expected to be high, lowering the
	198	* efficiency, so only proper data block groups are considered.
	199	*/
	200	return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
	201	!(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
	202	}
	203
aac0023c JB	204	#ifdef CONFIG_BTRFS_DEBUG
aac0023c JB	205	static inline int btrfs_should_fragment_free_space(
32da5386	206	struct btrfs_block_group *block_group)
aac0023c JB	207	{
	208	struct btrfs_fs_info *fs_info = block_group->fs_info;
	209
	210	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
	211	block_group->flags & BTRFS_BLOCK_GROUP_METADATA) \|\|
	212	(btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
	213	block_group->flags & BTRFS_BLOCK_GROUP_DATA);
	214	}
	215	#endif
	216
32da5386	217	struct btrfs_block_group *btrfs_lookup_first_block_group(
2e405ad8	218	struct btrfs_fs_info *info, u64 bytenr);
32da5386	219	struct btrfs_block_group *btrfs_lookup_block_group(
2e405ad8	220	struct btrfs_fs_info *info, u64 bytenr);
32da5386 DS	221	struct btrfs_block_group *btrfs_next_block_group(
	222	struct btrfs_block_group *cache);
	223	void btrfs_get_block_group(struct btrfs_block_group *cache);
	224	void btrfs_put_block_group(struct btrfs_block_group *cache);
3eeb3226 JB	225	void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
3eeb3226 JB	226	const u64 start);
32da5386	227	void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
3eeb3226 JB	228	bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
3eeb3226 JB	229	void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
32da5386 DS	230	void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
32da5386 DS	231	void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
676f1f75	232	u64 num_bytes);
32da5386 DS	233	int btrfs_wait_block_group_cache_done(struct btrfs_block_group *cache);
32da5386 DS	234	int btrfs_cache_block_group(struct btrfs_block_group *cache,
676f1f75	235	int load_cache_only);
e3cb339f JB	236	void btrfs_put_caching_control(struct btrfs_caching_control *ctl);
e3cb339f JB	237	struct btrfs_caching_control *btrfs_get_caching_control(
32da5386 DS	238	struct btrfs_block_group *cache);
32da5386 DS	239	u64 add_new_free_space(struct btrfs_block_group *block_group,
9f21246d	240	u64 start, u64 end);
e3e0520b JB	241	struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
	242	struct btrfs_fs_info *fs_info,
	243	const u64 chunk_offset);
	244	int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
	245	u64 group_start, struct extent_map *em);
	246	void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
32da5386	247	void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
4358d963 JB	248	int btrfs_read_block_groups(struct btrfs_fs_info *info);
	249	int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
	250	u64 type, u64 chunk_offset, u64 size);
	251	void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
b12de528 QW	252	int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
b12de528 QW	253	bool do_chunk_alloc);
32da5386	254	void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
77745c05 JB	255	int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
	256	int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
	257	int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
ade4b516 JB	258	int btrfs_update_block_group(struct btrfs_trans_handle *trans,
ade4b516 JB	259	u64 bytenr, u64 num_bytes, int alloc);
32da5386	260	int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	261	u64 ram_bytes, u64 num_bytes, int delalloc);
32da5386	262	void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
ade4b516	263	u64 num_bytes, int delalloc);
07730d87 JB	264	int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
	265	enum btrfs_chunk_alloc_enum force);
	266	int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
	267	void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
878d7b67	268	u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
3e43c279 JB	269	void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3e43c279 JB	270	int btrfs_free_block_groups(struct btrfs_fs_info *info);
878d7b67 JB	271
	272	static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
	273	{
	274	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
	275	}
	276
	277	static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
	278	{
	279	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
	280	}
	281
	282	static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
	283	{
	284	return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
	285	}
676f1f75	286
32da5386	287	static inline int btrfs_block_group_done(struct btrfs_block_group *cache)
676f1f75 JB	288	{
	289	smp_mb();
	290	return cache->cached == BTRFS_CACHE_FINISHED \|\|
	291	cache->cached == BTRFS_CACHE_ERROR;
	292	}
2e405ad8	293
684b752b FM	294	void btrfs_freeze_block_group(struct btrfs_block_group *cache);
	295	void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);
	296
96a14336 NB	297	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	298	int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
	299	u64 physical, u64 *logical, int naddrs, int *stripe_len);
	300	#endif
	301
aac0023c	302	#endif /* BTRFS_BLOCK_GROUP_H */