[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;

	/* Usage count */
	atomic_t count;

	/*
	 * 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;

	/* For discard operations */
	atomic_t trimming;
	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;
}

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