[linux-2.6-block.git] / fs / btrfs / qgroup.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2014 Facebook.  All rights reserved.
 */

#ifndef BTRFS_QGROUP_H
#define BTRFS_QGROUP_H

#include "ulist.h"
#include "delayed-ref.h"

/*
 * Btrfs qgroup overview
 *
 * Btrfs qgroup splits into 3 main part:
 * 1) Reserve
 *    Reserve metadata/data space for incoming operations
 *    Affect how qgroup limit works
 *
 * 2) Trace
 *    Tell btrfs qgroup to trace dirty extents.
 *
 *    Dirty extents including:
 *    - Newly allocated extents
 *    - Extents going to be deleted (in this trans)
 *    - Extents whose owner is going to be modified
 *
 *    This is the main part affects whether qgroup numbers will stay
 *    consistent.
 *    Btrfs qgroup can trace clean extents and won't cause any problem,
 *    but it will consume extra CPU time, it should be avoided if possible.
 *
 * 3) Account
 *    Btrfs qgroup will updates its numbers, based on dirty extents traced
 *    in previous step.
 *
 *    Normally at qgroup rescan and transaction commit time.
 */

/*
 * Record a dirty extent, and info qgroup to update quota on it
 * TODO: Use kmem cache to alloc it.
 */
struct btrfs_qgroup_extent_record {
	struct rb_node node;
	u64 bytenr;
	u64 num_bytes;
	struct ulist *old_roots;
};

/*
 * Qgroup reservation types:
 *
 * DATA:
 *	space reserved for data
 *
 * META_PERTRANS:
 * 	Space reserved for metadata (per-transaction)
 * 	Due to the fact that qgroup data is only updated at transaction commit
 * 	time, reserved space for metadata must be kept until transaction
 * 	commits.
 * 	Any metadata reserved that are used in btrfs_start_transaction() should
 * 	be of this type.
 *
 * META_PREALLOC:
 *	There are cases where metadata space is reserved before starting
 *	transaction, and then btrfs_join_transaction() to get a trans handle.
 *	Any metadata reserved for such usage should be of this type.
 *	And after join_transaction() part (or all) of such reservation should
 *	be converted into META_PERTRANS.
 */
enum btrfs_qgroup_rsv_type {
	BTRFS_QGROUP_RSV_DATA = 0,
	BTRFS_QGROUP_RSV_META_PERTRANS,
	BTRFS_QGROUP_RSV_META_PREALLOC,
	BTRFS_QGROUP_RSV_LAST,
};

/*
 * Represents how many bytes we have reserved for this qgroup.
 *
 * Each type should have different reservation behavior.
 * E.g, data follows its io_tree flag modification, while
 * *currently* meta is just reserve-and-clear during transcation.
 *
 * TODO: Add new type for reservation which can survive transaction commit.
 * Currect metadata reservation behavior is not suitable for such case.
 */
struct btrfs_qgroup_rsv {
	u64 values[BTRFS_QGROUP_RSV_LAST];
};

/*
 * one struct for each qgroup, organized in fs_info->qgroup_tree.
 */
struct btrfs_qgroup {
	u64 qgroupid;

	/*
	 * state
	 */
	u64 rfer;	/* referenced */
	u64 rfer_cmpr;	/* referenced compressed */
	u64 excl;	/* exclusive */
	u64 excl_cmpr;	/* exclusive compressed */

	/*
	 * limits
	 */
	u64 lim_flags;	/* which limits are set */
	u64 max_rfer;
	u64 max_excl;
	u64 rsv_rfer;
	u64 rsv_excl;

	/*
	 * reservation tracking
	 */
	struct btrfs_qgroup_rsv rsv;

	/*
	 * lists
	 */
	struct list_head groups;  /* groups this group is member of */
	struct list_head members; /* groups that are members of this group */
	struct list_head dirty;   /* dirty groups */
	struct rb_node node;	  /* tree of qgroups */

	/*
	 * temp variables for accounting operations
	 * Refer to qgroup_shared_accounting() for details.
	 */
	u64 old_refcnt;
	u64 new_refcnt;
};

/*
 * For qgroup event trace points only
 */
#define QGROUP_RESERVE		(1<<0)
#define QGROUP_RELEASE		(1<<1)
#define QGROUP_FREE		(1<<2)

int btrfs_quota_enable(struct btrfs_fs_info *fs_info);
int btrfs_quota_disable(struct btrfs_fs_info *fs_info);
int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
				     bool interruptible);
int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
			      u64 dst);
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
			      u64 dst);
int btrfs_create_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid);
int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid);
int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid,
		       struct btrfs_qgroup_limit *limit);
int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
struct btrfs_delayed_extent_op;

/*
 * Inform qgroup to trace one dirty extent, its info is recorded in @record.
 * So qgroup can account it at transaction committing time.
 *
 * No lock version, caller must acquire delayed ref lock and allocated memory,
 * then call btrfs_qgroup_trace_extent_post() after exiting lock context.
 *
 * Return 0 for success insert
 * Return >0 for existing record, caller can free @record safely.
 * Error is not possible
 */
int btrfs_qgroup_trace_extent_nolock(
		struct btrfs_fs_info *fs_info,
		struct btrfs_delayed_ref_root *delayed_refs,
		struct btrfs_qgroup_extent_record *record);

/*
 * Post handler after qgroup_trace_extent_nolock().
 *
 * NOTE: Current qgroup does the expensive backref walk at transaction
 * committing time with TRANS_STATE_COMMIT_DOING, this blocks incoming
 * new transaction.
 * This is designed to allow btrfs_find_all_roots() to get correct new_roots
 * result.
 *
 * However for old_roots there is no need to do backref walk at that time,
 * since we search commit roots to walk backref and result will always be
 * correct.
 *
 * Due to the nature of no lock version, we can't do backref there.
 * So we must call btrfs_qgroup_trace_extent_post() after exiting
 * spinlock context.
 *
 * TODO: If we can fix and prove btrfs_find_all_roots() can get correct result
 * using current root, then we can move all expensive backref walk out of
 * transaction committing, but not now as qgroup accounting will be wrong again.
 */
int btrfs_qgroup_trace_extent_post(struct btrfs_fs_info *fs_info,
				   struct btrfs_qgroup_extent_record *qrecord);

/*
 * Inform qgroup to trace one dirty extent, specified by @bytenr and
 * @num_bytes.
 * So qgroup can account it at commit trans time.
 *
 * Better encapsulated version, with memory allocation and backref walk for
 * commit roots.
 * So this can sleep.
 *
 * Return 0 if the operation is done.
 * Return <0 for error, like memory allocation failure or invalid parameter
 * (NULL trans)
 */
int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
			      u64 num_bytes, gfp_t gfp_flag);

/*
 * Inform qgroup to trace all leaf items of data
 *
 * Return 0 for success
 * Return <0 for error(ENOMEM)
 */
int btrfs_qgroup_trace_leaf_items(struct btrfs_trans_handle *trans,
				  struct extent_buffer *eb);
/*
 * Inform qgroup to trace a whole subtree, including all its child tree
 * blocks and data.
 * The root tree block is specified by @root_eb.
 *
 * Normally used by relocation(tree block swap) and subvolume deletion.
 *
 * Return 0 for success
 * Return <0 for error(ENOMEM or tree search error)
 */
int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
			       struct extent_buffer *root_eb,
			       u64 root_gen, int root_level);

int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
				struct btrfs_block_group_cache *bg_cache,
				struct extent_buffer *src_parent, int src_slot,
				struct extent_buffer *dst_parent, int dst_slot,
				u64 last_snapshot);
int btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans, u64 bytenr,
				u64 num_bytes, struct ulist *old_roots,
				struct ulist *new_roots);
int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans);
int btrfs_run_qgroups(struct btrfs_trans_handle *trans);
int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
			 u64 objectid, struct btrfs_qgroup_inherit *inherit);
void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
			       u64 ref_root, u64 num_bytes,
			       enum btrfs_qgroup_rsv_type type);
static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
						 u64 ref_root, u64 num_bytes)
{
	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
		return;
	trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes);
	btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes,
				  BTRFS_QGROUP_RSV_DATA);
}

#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
			       u64 rfer, u64 excl);
#endif

/* New io_tree based accurate qgroup reserve API */
int btrfs_qgroup_reserve_data(struct inode *inode,
			struct extent_changeset **reserved, u64 start, u64 len);
int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len);
int btrfs_qgroup_free_data(struct inode *inode,
			struct extent_changeset *reserved, u64 start, u64 len);

int __btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
				enum btrfs_qgroup_rsv_type type, bool enforce);
/* Reserve metadata space for pertrans and prealloc type */
static inline int btrfs_qgroup_reserve_meta_pertrans(struct btrfs_root *root,
				int num_bytes, bool enforce)
{
	return __btrfs_qgroup_reserve_meta(root, num_bytes,
			BTRFS_QGROUP_RSV_META_PERTRANS, enforce);
}
static inline int btrfs_qgroup_reserve_meta_prealloc(struct btrfs_root *root,
				int num_bytes, bool enforce)
{
	return __btrfs_qgroup_reserve_meta(root, num_bytes,
			BTRFS_QGROUP_RSV_META_PREALLOC, enforce);
}

void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
			     enum btrfs_qgroup_rsv_type type);

/* Free per-transaction meta reservation for error handling */
static inline void btrfs_qgroup_free_meta_pertrans(struct btrfs_root *root,
						   int num_bytes)
{
	__btrfs_qgroup_free_meta(root, num_bytes,
			BTRFS_QGROUP_RSV_META_PERTRANS);
}

/* Pre-allocated meta reservation can be freed at need */
static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root,
						   int num_bytes)
{
	__btrfs_qgroup_free_meta(root, num_bytes,
			BTRFS_QGROUP_RSV_META_PREALLOC);
}

/*
 * Per-transaction meta reservation should be all freed at transaction commit
 * time
 */
void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root);

/*
 * Convert @num_bytes of META_PREALLOCATED reservation to META_PERTRANS.
 *
 * This is called when preallocated meta reservation needs to be used.
 * Normally after btrfs_join_transaction() call.
 */
void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);

void btrfs_qgroup_check_reserved_leak(struct inode *inode);

#endif
Commit	Line	Data
9888c340	1	/* SPDX-License-Identifier: GPL-2.0 */
fcebe456 JB	2	/*
fcebe456 JB	3	* Copyright (C) 2014 Facebook. All rights reserved.
fcebe456 JB	4	*/
fcebe456 JB	5
9888c340 DS	6	#ifndef BTRFS_QGROUP_H
9888c340 DS	7	#define BTRFS_QGROUP_H
fcebe456	8
3368d001 QW	9	#include "ulist.h"
	10	#include "delayed-ref.h"
	11
1d2beaa9 QW	12	/*
	13	* Btrfs qgroup overview
	14	*
	15	* Btrfs qgroup splits into 3 main part:
	16	* 1) Reserve
	17	* Reserve metadata/data space for incoming operations
	18	* Affect how qgroup limit works
	19	*
	20	* 2) Trace
	21	* Tell btrfs qgroup to trace dirty extents.
	22	*
	23	* Dirty extents including:
	24	* - Newly allocated extents
	25	* - Extents going to be deleted (in this trans)
	26	* - Extents whose owner is going to be modified
	27	*
	28	* This is the main part affects whether qgroup numbers will stay
	29	* consistent.
	30	* Btrfs qgroup can trace clean extents and won't cause any problem,
	31	* but it will consume extra CPU time, it should be avoided if possible.
	32	*
	33	* 3) Account
	34	* Btrfs qgroup will updates its numbers, based on dirty extents traced
	35	* in previous step.
	36	*
	37	* Normally at qgroup rescan and transaction commit time.
	38	*/
	39
3368d001 QW	40	/*
	41	* Record a dirty extent, and info qgroup to update quota on it
	42	* TODO: Use kmem cache to alloc it.
	43	*/
	44	struct btrfs_qgroup_extent_record {
	45	struct rb_node node;
	46	u64 bytenr;
	47	u64 num_bytes;
	48	struct ulist *old_roots;
	49	};
	50
733e03a0 QW	51	/*
	52	* Qgroup reservation types:
	53	*
	54	* DATA:
	55	* space reserved for data
	56	*
	57	* META_PERTRANS:
	58	* Space reserved for metadata (per-transaction)
	59	* Due to the fact that qgroup data is only updated at transaction commit
	60	* time, reserved space for metadata must be kept until transaction
	61	* commits.
	62	* Any metadata reserved that are used in btrfs_start_transaction() should
	63	* be of this type.
	64	*
	65	* META_PREALLOC:
	66	* There are cases where metadata space is reserved before starting
	67	* transaction, and then btrfs_join_transaction() to get a trans handle.
	68	* Any metadata reserved for such usage should be of this type.
	69	* And after join_transaction() part (or all) of such reservation should
	70	* be converted into META_PERTRANS.
	71	*/
d4e5c920 QW	72	enum btrfs_qgroup_rsv_type {
d4e5c920 QW	73	BTRFS_QGROUP_RSV_DATA = 0,
733e03a0 QW	74	BTRFS_QGROUP_RSV_META_PERTRANS,
733e03a0 QW	75	BTRFS_QGROUP_RSV_META_PREALLOC,
d4e5c920 QW	76	BTRFS_QGROUP_RSV_LAST,
	77	};
	78
	79	/*
	80	* Represents how many bytes we have reserved for this qgroup.
	81	*
	82	* Each type should have different reservation behavior.
	83	* E.g, data follows its io_tree flag modification, while
	84	* currently meta is just reserve-and-clear during transcation.
	85	*
	86	* TODO: Add new type for reservation which can survive transaction commit.
	87	* Currect metadata reservation behavior is not suitable for such case.
	88	*/
	89	struct btrfs_qgroup_rsv {
	90	u64 values[BTRFS_QGROUP_RSV_LAST];
	91	};
	92
3159fe7b QW	93	/*
	94	* one struct for each qgroup, organized in fs_info->qgroup_tree.
	95	*/
	96	struct btrfs_qgroup {
	97	u64 qgroupid;
	98
	99	/*
	100	* state
	101	*/
	102	u64 rfer; /* referenced */
	103	u64 rfer_cmpr; /* referenced compressed */
	104	u64 excl; /* exclusive */
	105	u64 excl_cmpr; /* exclusive compressed */
	106
	107	/*
	108	* limits
	109	*/
	110	u64 lim_flags; /* which limits are set */
	111	u64 max_rfer;
	112	u64 max_excl;
	113	u64 rsv_rfer;
	114	u64 rsv_excl;
	115
	116	/*
	117	* reservation tracking
	118	*/
d4e5c920	119	struct btrfs_qgroup_rsv rsv;
3159fe7b QW	120
	121	/*
	122	* lists
	123	*/
	124	struct list_head groups; /* groups this group is member of */
	125	struct list_head members; /* groups that are members of this group */
	126	struct list_head dirty; /* dirty groups */
	127	struct rb_node node; /* tree of qgroups */
	128
	129	/*
	130	* temp variables for accounting operations
	131	* Refer to qgroup_shared_accounting() for details.
	132	*/
	133	u64 old_refcnt;
	134	u64 new_refcnt;
	135	};
	136
81fb6f77 QW	137	/*
	138	* For qgroup event trace points only
	139	*/
	140	#define QGROUP_RESERVE (1<<0)
	141	#define QGROUP_RELEASE (1<<1)
	142	#define QGROUP_FREE (1<<2)
	143
340f1aa2 NB	144	int btrfs_quota_enable(struct btrfs_fs_info *fs_info);
340f1aa2 NB	145	int btrfs_quota_disable(struct btrfs_fs_info *fs_info);
fcebe456 JB	146	int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
fcebe456 JB	147	void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
d06f23d6 JM	148	int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
d06f23d6 JM	149	bool interruptible);
9f8a6ce6 LF	150	int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
9f8a6ce6 LF	151	u64 dst);
39616c27 LF	152	int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
39616c27 LF	153	u64 dst);
49a05ecd	154	int btrfs_create_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid);
3efbee1d	155	int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid);
f0042d5e	156	int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid,
fcebe456 JB	157	struct btrfs_qgroup_limit *limit);
	158	int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info);
	159	void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info);
	160	struct btrfs_delayed_extent_op;
d1b8b94a	161
cb93b52c	162	/*
50b3e040	163	* Inform qgroup to trace one dirty extent, its info is recorded in @record.
fb235dc0	164	* So qgroup can account it at transaction committing time.
cb93b52c	165	*
fb235dc0 QW	166	* No lock version, caller must acquire delayed ref lock and allocated memory,
fb235dc0 QW	167	* then call btrfs_qgroup_trace_extent_post() after exiting lock context.
cb93b52c QW	168	*
	169	* Return 0 for success insert
	170	* Return >0 for existing record, caller can free @record safely.
	171	* Error is not possible
	172	*/
50b3e040	173	int btrfs_qgroup_trace_extent_nolock(
cb93b52c QW	174	struct btrfs_fs_info *fs_info,
	175	struct btrfs_delayed_ref_root *delayed_refs,
	176	struct btrfs_qgroup_extent_record *record);
	177
fb235dc0 QW	178	/*
	179	* Post handler after qgroup_trace_extent_nolock().
	180	*
	181	* NOTE: Current qgroup does the expensive backref walk at transaction
	182	* committing time with TRANS_STATE_COMMIT_DOING, this blocks incoming
	183	* new transaction.
	184	* This is designed to allow btrfs_find_all_roots() to get correct new_roots
	185	* result.
	186	*
	187	* However for old_roots there is no need to do backref walk at that time,
	188	* since we search commit roots to walk backref and result will always be
	189	* correct.
	190	*
	191	* Due to the nature of no lock version, we can't do backref there.
	192	* So we must call btrfs_qgroup_trace_extent_post() after exiting
	193	* spinlock context.
	194	*
	195	* TODO: If we can fix and prove btrfs_find_all_roots() can get correct result
	196	* using current root, then we can move all expensive backref walk out of
	197	* transaction committing, but not now as qgroup accounting will be wrong again.
	198	*/
	199	int btrfs_qgroup_trace_extent_post(struct btrfs_fs_info *fs_info,
	200	struct btrfs_qgroup_extent_record *qrecord);
	201
cb93b52c	202	/*
50b3e040 QW	203	* Inform qgroup to trace one dirty extent, specified by @bytenr and
	204	* @num_bytes.
	205	* So qgroup can account it at commit trans time.
cb93b52c	206	*
fb235dc0 QW	207	* Better encapsulated version, with memory allocation and backref walk for
	208	* commit roots.
	209	* So this can sleep.
cb93b52c QW	210	*
	211	* Return 0 if the operation is done.
	212	* Return <0 for error, like memory allocation failure or invalid parameter
	213	* (NULL trans)
	214	*/
a95f3aaf LF	215	int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
a95f3aaf LF	216	u64 num_bytes, gfp_t gfp_flag);
cb93b52c	217
33d1f05c QW	218	/*
	219	* Inform qgroup to trace all leaf items of data
	220	*
	221	* Return 0 for success
	222	* Return <0 for error(ENOMEM)
	223	*/
	224	int btrfs_qgroup_trace_leaf_items(struct btrfs_trans_handle *trans,
33d1f05c QW	225	struct extent_buffer *eb);
	226	/*
	227	* Inform qgroup to trace a whole subtree, including all its child tree
	228	* blocks and data.
	229	* The root tree block is specified by @root_eb.
	230	*
	231	* Normally used by relocation(tree block swap) and subvolume deletion.
	232	*
	233	* Return 0 for success
	234	* Return <0 for error(ENOMEM or tree search error)
	235	*/
	236	int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
33d1f05c QW	237	struct extent_buffer *root_eb,
33d1f05c QW	238	u64 root_gen, int root_level);
5f527822 QW	239
5f527822 QW	240	int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
3d0174f7	241	struct btrfs_block_group_cache *bg_cache,
5f527822 QW	242	struct extent_buffer *src_parent, int src_slot,
	243	struct extent_buffer *dst_parent, int dst_slot,
	244	u64 last_snapshot);
8696d760 LF	245	int btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans, u64 bytenr,
	246	u64 num_bytes, struct ulist *old_roots,
	247	struct ulist *new_roots);
460fb20a	248	int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans);
280f8bd2	249	int btrfs_run_qgroups(struct btrfs_trans_handle *trans);
a9377422 LF	250	int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
a9377422 LF	251	u64 objectid, struct btrfs_qgroup_inherit *inherit);
297d750b	252	void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
d4e5c920 QW	253	u64 ref_root, u64 num_bytes,
d4e5c920 QW	254	enum btrfs_qgroup_rsv_type type);
297d750b QW	255	static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
	256	u64 ref_root, u64 num_bytes)
	257	{
3628b4ca QW	258	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
3628b4ca QW	259	return;
bc074524	260	trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes);
d4e5c920 QW	261	btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes,
d4e5c920 QW	262	BTRFS_QGROUP_RSV_DATA);
297d750b	263	}
fcebe456 JB	264
	265	#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	266	int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
	267	u64 rfer, u64 excl);
	268	#endif
	269
52472553	270	/* New io_tree based accurate qgroup reserve API */
364ecf36 QW	271	int btrfs_qgroup_reserve_data(struct inode *inode,
364ecf36 QW	272	struct extent_changeset **reserved, u64 start, u64 len);
f695fdce	273	int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len);
bc42bda2 QW	274	int btrfs_qgroup_free_data(struct inode *inode,
bc42bda2 QW	275	struct extent_changeset *reserved, u64 start, u64 len);
55eeaf05	276
733e03a0 QW	277	int __btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes,
	278	enum btrfs_qgroup_rsv_type type, bool enforce);
	279	/* Reserve metadata space for pertrans and prealloc type */
	280	static inline int btrfs_qgroup_reserve_meta_pertrans(struct btrfs_root *root,
	281	int num_bytes, bool enforce)
	282	{
	283	return __btrfs_qgroup_reserve_meta(root, num_bytes,
	284	BTRFS_QGROUP_RSV_META_PERTRANS, enforce);
	285	}
	286	static inline int btrfs_qgroup_reserve_meta_prealloc(struct btrfs_root *root,
	287	int num_bytes, bool enforce)
	288	{
	289	return __btrfs_qgroup_reserve_meta(root, num_bytes,
	290	BTRFS_QGROUP_RSV_META_PREALLOC, enforce);
	291	}
	292
	293	void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes,
	294	enum btrfs_qgroup_rsv_type type);
	295
	296	/* Free per-transaction meta reservation for error handling */
	297	static inline void btrfs_qgroup_free_meta_pertrans(struct btrfs_root *root,
	298	int num_bytes)
	299	{
	300	__btrfs_qgroup_free_meta(root, num_bytes,
	301	BTRFS_QGROUP_RSV_META_PERTRANS);
	302	}
	303
	304	/* Pre-allocated meta reservation can be freed at need */
	305	static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root,
	306	int num_bytes)
	307	{
	308	__btrfs_qgroup_free_meta(root, num_bytes,
	309	BTRFS_QGROUP_RSV_META_PREALLOC);
	310	}
	311
	312	/*
	313	* Per-transaction meta reservation should be all freed at transaction commit
	314	* time
	315	*/
	316	void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root);
	317
64cfaef6 QW	318	/*
	319	* Convert @num_bytes of META_PREALLOCATED reservation to META_PERTRANS.
	320	*
	321	* This is called when preallocated meta reservation needs to be used.
	322	* Normally after btrfs_join_transaction() call.
	323	*/
	324	void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);
	325
56fa9d07	326	void btrfs_qgroup_check_reserved_leak(struct inode *inode);
9888c340 DS	327
9888c340 DS	328	#endif