[mirror_zfs.git] / include / sys / dsl_dataset.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2013 by Delphix. All rights reserved.
 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
 * Copyright (c) 2013 Steven Hartland. All rights reserved.
 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
 */

#ifndef	_SYS_DSL_DATASET_H
#define	_SYS_DSL_DATASET_H

#include <sys/dmu.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/zio.h>
#include <sys/bplist.h>
#include <sys/dsl_synctask.h>
#include <sys/zfs_context.h>
#include <sys/dsl_deadlist.h>
#include <sys/refcount.h>

#ifdef	__cplusplus
extern "C" {
#endif

struct dsl_dataset;
struct dsl_dir;
struct dsl_pool;

#define	DS_FLAG_INCONSISTENT	(1ULL<<0)
#define	DS_IS_INCONSISTENT(ds)	\
	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)

/*
 * Do not allow this dataset to be promoted.
 */
#define	DS_FLAG_NOPROMOTE	(1ULL<<1)

/*
 * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
 * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
 * refquota/refreservations).
 */
#define	DS_FLAG_UNIQUE_ACCURATE	(1ULL<<2)

/*
 * DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
 * on a dataset. This allows the dataset to be destroyed using 'zfs release'.
 */
#define	DS_FLAG_DEFER_DESTROY	(1ULL<<3)
#define	DS_IS_DEFER_DESTROY(ds)	\
	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)

/*
 * DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
 * They should be of the format <reverse-dns>:<field>.
 */

/*
 * This field's value is the object ID of a zap object which contains the
 * bookmarks of this dataset.  If it is present, then this dataset is counted
 * in the refcount of the SPA_FEATURES_BOOKMARKS feature.
 */
#define	DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"

/*
 * This field is present (with value=0) if this dataset may contain large
 * blocks (>128KB).  If it is present, then this dataset
 * is counted in the refcount of the SPA_FEATURE_LARGE_BLOCKS feature.
 */
#define	DS_FIELD_LARGE_BLOCKS "org.open-zfs:large_blocks"

/*
 * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
 * name lookups should be performed case-insensitively.
 */
#define	DS_FLAG_CI_DATASET	(1ULL<<16)

#define	DS_CREATE_FLAG_NODIRTY	(1ULL<<24)

typedef struct dsl_dataset_phys {
	uint64_t ds_dir_obj;		/* DMU_OT_DSL_DIR */
	uint64_t ds_prev_snap_obj;	/* DMU_OT_DSL_DATASET */
	uint64_t ds_prev_snap_txg;
	uint64_t ds_next_snap_obj;	/* DMU_OT_DSL_DATASET */
	uint64_t ds_snapnames_zapobj;	/* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
	uint64_t ds_num_children;	/* clone/snap children; ==0 for head */
	uint64_t ds_creation_time;	/* seconds since 1970 */
	uint64_t ds_creation_txg;
	uint64_t ds_deadlist_obj;	/* DMU_OT_DEADLIST */
	/*
	 * ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
	 * include all blocks referenced by this dataset, including those
	 * shared with any other datasets.
	 */
	uint64_t ds_referenced_bytes;
	uint64_t ds_compressed_bytes;
	uint64_t ds_uncompressed_bytes;
	uint64_t ds_unique_bytes;	/* only relevant to snapshots */
	/*
	 * The ds_fsid_guid is a 56-bit ID that can change to avoid
	 * collisions.  The ds_guid is a 64-bit ID that will never
	 * change, so there is a small probability that it will collide.
	 */
	uint64_t ds_fsid_guid;
	uint64_t ds_guid;
	uint64_t ds_flags;		/* DS_FLAG_* */
	blkptr_t ds_bp;
	uint64_t ds_next_clones_obj;	/* DMU_OT_DSL_CLONES */
	uint64_t ds_props_obj;		/* DMU_OT_DSL_PROPS for snaps */
	uint64_t ds_userrefs_obj;	/* DMU_OT_USERREFS */
	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
} dsl_dataset_phys_t;

typedef struct dsl_dataset {
	dmu_buf_user_t ds_dbu;

	/* Immutable: */
	struct dsl_dir *ds_dir;
	dmu_buf_t *ds_dbuf;
	uint64_t ds_object;
	uint64_t ds_fsid_guid;
	boolean_t ds_is_snapshot;

	/* only used in syncing context, only valid for non-snapshots: */
	struct dsl_dataset *ds_prev;
	uint64_t ds_bookmarks;  /* DMU_OTN_ZAP_METADATA */
	boolean_t ds_large_blocks;
	boolean_t ds_need_large_blocks;

	/* has internal locking: */
	dsl_deadlist_t ds_deadlist;
	bplist_t ds_pending_deadlist;

	/* protected by lock on pool's dp_dirty_datasets list */
	txg_node_t ds_dirty_link;
	list_node_t ds_synced_link;

	/*
	 * ds_phys->ds_<accounting> is also protected by ds_lock.
	 * Protected by ds_lock:
	 */
	kmutex_t ds_lock;
	objset_t *ds_objset;
	uint64_t ds_userrefs;
	void *ds_owner;

	/*
	 * Long holds prevent the ds from being destroyed; they allow the
	 * ds to remain held even after dropping the dp_config_rwlock.
	 * Owning counts as a long hold.  See the comments above
	 * dsl_pool_hold() for details.
	 */
	refcount_t ds_longholds;

	/* no locking; only for making guesses */
	uint64_t ds_trysnap_txg;

	/* for objset_open() */
	kmutex_t ds_opening_lock;

	uint64_t ds_reserved;	/* cached refreservation */
	uint64_t ds_quota;	/* cached refquota */

	kmutex_t ds_sendstream_lock;
	list_t ds_sendstreams;

	/* Protected by ds_lock; keep at end of struct for better locality */
	char ds_snapname[MAXNAMELEN];
} dsl_dataset_t;

static inline dsl_dataset_phys_t *
dsl_dataset_phys(dsl_dataset_t *ds)
{
	return (ds->ds_dbuf->db_data);
}

/*
 * The max length of a temporary tag prefix is the number of hex digits
 * required to express UINT64_MAX plus one for the hyphen.
 */
#define	MAX_TAG_PREFIX_LEN	17

#define	DS_UNIQUE_IS_ACCURATE(ds)	\
	((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)

int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
    dsl_dataset_t **dsp);
boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
    void *tag);
int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
    dsl_dataset_t **);
void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
int dsl_dataset_own(struct dsl_pool *dp, const char *name,
    void *tag, dsl_dataset_t **dsp);
int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
    void *tag, dsl_dataset_t **dsp);
void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
void dsl_dataset_name(dsl_dataset_t *ds, char *name);
boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
    dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
    uint64_t flags, dmu_tx_t *tx);
int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
int dsl_dataset_promote(const char *name, char *conflsnap);
int dsl_dataset_rename_snapshot(const char *fsname,
    const char *oldsnapname, const char *newsnapname, boolean_t recursive);
int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
    minor_t cleanup_minor, const char *htag);

blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);

spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);

boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
    dsl_dataset_t *snap);

void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx);

void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
    dmu_tx_t *tx);
int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
    dmu_tx_t *tx, boolean_t async);
boolean_t dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp,
    uint64_t blk_birth);
uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
    uint64_t *value);

void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv);
void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
void dsl_dataset_space(dsl_dataset_t *ds,
    uint64_t *refdbytesp, uint64_t *availbytesp,
    uint64_t *usedobjsp, uint64_t *availobjsp);
uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
int dsl_dataset_activate_large_blocks(const char *dsname);
void dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx);

int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);

int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
    uint64_t asize, uint64_t inflight, uint64_t *used,
    uint64_t *ref_rsrv);
int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
    uint64_t quota);
int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
    uint64_t reservation);

boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
    uint64_t earlier_txg);
void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);

int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
    dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
    dsl_dataset_t *origin_head, dmu_tx_t *tx);
int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
    dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr);
void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
    dmu_tx_t *tx);

void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
    dmu_tx_t *tx);
void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
int dsl_dataset_get_snapname(dsl_dataset_t *ds);
int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
    uint64_t *value);
int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
    boolean_t adj_cnt);
void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
    zprop_source_t source, uint64_t value, dmu_tx_t *tx);
void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
int dsl_dataset_rollback(const char *fsname, void *owner, nvlist_t *result);

#ifdef ZFS_DEBUG
#define	dprintf_ds(ds, fmt, ...) do { \
	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
	char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
	dsl_dataset_name(ds, __ds_name); \
	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
	kmem_free(__ds_name, MAXNAMELEN); \
	} \
_NOTE(CONSTCOND) } while (0)
#else
#define	dprintf_ds(dd, fmt, ...)
#endif

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_DSL_DATASET_H */
Commit	Line	Data
34dc7c2f BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License (the "License").
	6	* You may not use this file except in compliance with the License.
	7	*
	8	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	9	* or http://www.opensolaris.org/os/licensing.
	10	* See the License for the specific language governing permissions
	11	* and limitations under the License.
	12	*
	13	* When distributing Covered Code, include this CDDL HEADER in each
	14	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	15	* If applicable, add the following below this CDDL HEADER, with the
	16	* fields enclosed by brackets "[]" replaced with your own identifying
	17	* information: Portions Copyright [yyyy] [name of copyright owner]
	18	*
	19	* CDDL HEADER END
	20	*/
	21	/*
428870ff	22	* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
19580676	23	* Copyright (c) 2013 by Delphix. All rights reserved.
788eb90c	24	* Copyright (c) 2013, Joyent, Inc. All rights reserved.
95fd54a1	25	* Copyright (c) 2013 Steven Hartland. All rights reserved.
0c66c32d	26	* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
34dc7c2f BB	27	*/
	28
	29	#ifndef _SYS_DSL_DATASET_H
	30	#define _SYS_DSL_DATASET_H
	31
34dc7c2f BB	32	#include <sys/dmu.h>
	33	#include <sys/spa.h>
	34	#include <sys/txg.h>
	35	#include <sys/zio.h>
	36	#include <sys/bplist.h>
	37	#include <sys/dsl_synctask.h>
	38	#include <sys/zfs_context.h>
428870ff	39	#include <sys/dsl_deadlist.h>
13fe0198	40	#include <sys/refcount.h>
34dc7c2f BB	41
	42	#ifdef __cplusplus
	43	extern "C" {
	44	#endif
	45
	46	struct dsl_dataset;
	47	struct dsl_dir;
	48	struct dsl_pool;
	49
34dc7c2f	50	#define DS_FLAG_INCONSISTENT (1ULL<<0)
b128c09f	51	#define DS_IS_INCONSISTENT(ds) \
d683ddbb	52	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
fa86b5db	53
34dc7c2f	54	/*
fa86b5db	55	* Do not allow this dataset to be promoted.
34dc7c2f BB	56	*/
	57	#define DS_FLAG_NOPROMOTE (1ULL<<1)
	58
	59	/*
	60	* DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
	61	* calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
	62	* refquota/refreservations).
	63	*/
	64	#define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
	65
45d1cae3 BB	66	/*
	67	* DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
	68	* on a dataset. This allows the dataset to be destroyed using 'zfs release'.
	69	*/
	70	#define DS_FLAG_DEFER_DESTROY (1ULL<<3)
	71	#define DS_IS_DEFER_DESTROY(ds) \
d683ddbb	72	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
45d1cae3	73
fa86b5db MA	74	/*
	75	* DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
	76	* They should be of the format <reverse-dns>:<field>.
	77	*/
	78
da536844 MA	79	/*
	80	* This field's value is the object ID of a zap object which contains the
	81	* bookmarks of this dataset. If it is present, then this dataset is counted
	82	* in the refcount of the SPA_FEATURES_BOOKMARKS feature.
	83	*/
	84	#define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
	85
f1512ee6 MA	86	/*
	87	* This field is present (with value=0) if this dataset may contain large
	88	* blocks (>128KB). If it is present, then this dataset
	89	* is counted in the refcount of the SPA_FEATURE_LARGE_BLOCKS feature.
	90	*/
	91	#define DS_FIELD_LARGE_BLOCKS "org.open-zfs:large_blocks"
	92
34dc7c2f BB	93	/*
	94	* DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
	95	* name lookups should be performed case-insensitively.
	96	*/
	97	#define DS_FLAG_CI_DATASET (1ULL<<16)
	98
13fe0198 MA	99	#define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
13fe0198 MA	100
34dc7c2f	101	typedef struct dsl_dataset_phys {
b128c09f BB	102	uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
b128c09f BB	103	uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
34dc7c2f	104	uint64_t ds_prev_snap_txg;
b128c09f BB	105	uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
b128c09f BB	106	uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
34dc7c2f BB	107	uint64_t ds_num_children; /* clone/snap children; ==0 for head */
	108	uint64_t ds_creation_time; /* seconds since 1970 */
	109	uint64_t ds_creation_txg;
428870ff	110	uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
9ae529ec CS	111	/*
	112	* ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
	113	* include all blocks referenced by this dataset, including those
	114	* shared with any other datasets.
	115	*/
	116	uint64_t ds_referenced_bytes;
34dc7c2f BB	117	uint64_t ds_compressed_bytes;
	118	uint64_t ds_uncompressed_bytes;
	119	uint64_t ds_unique_bytes; /* only relevant to snapshots */
	120	/*
	121	* The ds_fsid_guid is a 56-bit ID that can change to avoid
	122	* collisions. The ds_guid is a 64-bit ID that will never
	123	* change, so there is a small probability that it will collide.
	124	*/
	125	uint64_t ds_fsid_guid;
	126	uint64_t ds_guid;
b128c09f	127	uint64_t ds_flags; /* DS_FLAG_* */
34dc7c2f	128	blkptr_t ds_bp;
b128c09f BB	129	uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
b128c09f BB	130	uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
45d1cae3 BB	131	uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
45d1cae3 BB	132	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
34dc7c2f BB	133	} dsl_dataset_phys_t;
	134
	135	typedef struct dsl_dataset {
0c66c32d JG	136	dmu_buf_user_t ds_dbu;
0c66c32d JG	137
34dc7c2f BB	138	/* Immutable: */
34dc7c2f BB	139	struct dsl_dir *ds_dir;
34dc7c2f BB	140	dmu_buf_t *ds_dbuf;
	141	uint64_t ds_object;
	142	uint64_t ds_fsid_guid;
0c66c32d	143	boolean_t ds_is_snapshot;
34dc7c2f	144
b128c09f BB	145	/* only used in syncing context, only valid for non-snapshots: */
b128c09f BB	146	struct dsl_dataset *ds_prev;
da536844	147	uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
f1512ee6 MA	148	boolean_t ds_large_blocks;
f1512ee6 MA	149	boolean_t ds_need_large_blocks;
34dc7c2f BB	150
34dc7c2f BB	151	/* has internal locking: */
428870ff BB	152	dsl_deadlist_t ds_deadlist;
428870ff BB	153	bplist_t ds_pending_deadlist;
34dc7c2f BB	154
	155	/* protected by lock on pool's dp_dirty_datasets list */
	156	txg_node_t ds_dirty_link;
	157	list_node_t ds_synced_link;
	158
	159	/*
	160	* ds_phys->ds_<accounting> is also protected by ds_lock.
	161	* Protected by ds_lock:
	162	*/
	163	kmutex_t ds_lock;
428870ff	164	objset_t *ds_objset;
45d1cae3	165	uint64_t ds_userrefs;
13fe0198	166	void *ds_owner;
b128c09f BB	167
b128c09f BB	168	/*
13fe0198 MA	169	* Long holds prevent the ds from being destroyed; they allow the
	170	* ds to remain held even after dropping the dp_config_rwlock.
	171	* Owning counts as a long hold. See the comments above
	172	* dsl_pool_hold() for details.
b128c09f	173	*/
13fe0198	174	refcount_t ds_longholds;
34dc7c2f BB	175
	176	/* no locking; only for making guesses */
	177	uint64_t ds_trysnap_txg;
	178
	179	/* for objset_open() */
	180	kmutex_t ds_opening_lock;
	181
	182	uint64_t ds_reserved; /* cached refreservation */
	183	uint64_t ds_quota; /* cached refquota */
	184
37abac6d BP	185	kmutex_t ds_sendstream_lock;
	186	list_t ds_sendstreams;
	187
34dc7c2f BB	188	/* Protected by ds_lock; keep at end of struct for better locality */
	189	char ds_snapname[MAXNAMELEN];
	190	} dsl_dataset_t;
	191
d683ddbb JG	192	static inline dsl_dataset_phys_t *
	193	dsl_dataset_phys(dsl_dataset_t *ds)
	194	{
	195	return (ds->ds_dbuf->db_data);
	196	}
	197
572e2857 BB	198	/*
	199	* The max length of a temporary tag prefix is the number of hex digits
	200	* required to express UINT64_MAX plus one for the hyphen.
	201	*/
	202	#define MAX_TAG_PREFIX_LEN 17
	203
34dc7c2f	204	#define DS_UNIQUE_IS_ACCURATE(ds) \
d683ddbb	205	((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
34dc7c2f	206
13fe0198 MA	207	int dsl_dataset_hold(struct dsl_pool dp, const char name, void *tag,
13fe0198 MA	208	dsl_dataset_t **dsp);
6ebebace JG	209	boolean_t dsl_dataset_try_add_ref(struct dsl_pool dp, dsl_dataset_t ds,
6ebebace JG	210	void *tag);
13fe0198 MA	211	int dsl_dataset_hold_obj(struct dsl_pool dp, uint64_t dsobj, void tag,
	212	dsl_dataset_t **);
	213	void dsl_dataset_rele(dsl_dataset_t ds, void tag);
	214	int dsl_dataset_own(struct dsl_pool dp, const char name,
428870ff	215	void tag, dsl_dataset_t *dsp);
b128c09f	216	int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
13fe0198	217	void tag, dsl_dataset_t *dsp);
428870ff	218	void dsl_dataset_disown(dsl_dataset_t ds, void tag);
13fe0198 MA	219	void dsl_dataset_name(dsl_dataset_t ds, char name);
13fe0198 MA	220	boolean_t dsl_dataset_tryown(dsl_dataset_t ds, void tag);
b128c09f BB	221	uint64_t dsl_dataset_create_sync(dsl_dir_t pds, const char lastname,
	222	dsl_dataset_t origin, uint64_t flags, cred_t , dmu_tx_t *);
	223	uint64_t dsl_dataset_create_sync_dd(dsl_dir_t dd, dsl_dataset_t origin,
34dc7c2f	224	uint64_t flags, dmu_tx_t *tx);
13fe0198	225	int dsl_dataset_snapshot(nvlist_t snaps, nvlist_t props, nvlist_t *errors);
428870ff	226	int dsl_dataset_promote(const char name, char conflsnap);
13fe0198 MA	227	int dsl_dataset_rename_snapshot(const char *fsname,
	228	const char oldsnapname, const char newsnapname, boolean_t recursive);
	229	int dsl_dataset_snapshot_tmp(const char fsname, const char snapname,
	230	minor_t cleanup_minor, const char *htag);
34dc7c2f	231
34dc7c2f BB	232	blkptr_t dsl_dataset_get_blkptr(dsl_dataset_t ds);
	233	void dsl_dataset_set_blkptr(dsl_dataset_t ds, blkptr_t bp, dmu_tx_t *tx);
	234
	235	spa_t dsl_dataset_get_spa(dsl_dataset_t ds);
	236
19580676 MA	237	boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
19580676 MA	238	dsl_dataset_t *snap);
34dc7c2f BB	239
	240	void dsl_dataset_sync(dsl_dataset_t os, zio_t zio, dmu_tx_t *tx);
	241
428870ff	242	void dsl_dataset_block_born(dsl_dataset_t ds, const blkptr_t bp,
34dc7c2f	243	dmu_tx_t *tx);
428870ff BB	244	int dsl_dataset_block_kill(dsl_dataset_t ds, const blkptr_t bp,
	245	dmu_tx_t *tx, boolean_t async);
	246	boolean_t dsl_dataset_block_freeable(dsl_dataset_t ds, const blkptr_t bp,
	247	uint64_t blk_birth);
34dc7c2f	248	uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds);
6772fb67 BB	249	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
6772fb67 BB	250	uint64_t *value);
34dc7c2f BB	251
	252	void dsl_dataset_dirty(dsl_dataset_t ds, dmu_tx_t tx);
	253	void dsl_dataset_stats(dsl_dataset_t os, nvlist_t nv);
	254	void dsl_dataset_fast_stat(dsl_dataset_t ds, dmu_objset_stats_t stat);
	255	void dsl_dataset_space(dsl_dataset_t *ds,
	256	uint64_t refdbytesp, uint64_t availbytesp,
	257	uint64_t usedobjsp, uint64_t availobjsp);
	258	uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
330d06f9 MA	259	int dsl_dataset_space_written(dsl_dataset_t oldsnap, dsl_dataset_t new,
	260	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
	261	int dsl_dataset_space_wouldfree(dsl_dataset_t firstsnap, dsl_dataset_t last,
	262	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
04434775	263	boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
f1512ee6 MA	264	int dsl_dataset_activate_large_blocks(const char *dsname);
f1512ee6 MA	265	void dsl_dataset_activate_large_blocks_sync_impl(uint64_t dsobj, dmu_tx_t *tx);
34dc7c2f	266
34dc7c2f BB	267	int dsl_dsobj_to_dsname(char pname, uint64_t obj, char buf);
	268
	269	int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
	270	uint64_t asize, uint64_t inflight, uint64_t *used,
	271	uint64_t *ref_rsrv);
13fe0198	272	int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
428870ff	273	uint64_t quota);
13fe0198	274	int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
428870ff BB	275	uint64_t reservation);
428870ff BB	276
da536844 MA	277	boolean_t dsl_dataset_is_before(dsl_dataset_t later, dsl_dataset_t earlier,
da536844 MA	278	uint64_t earlier_txg);
13fe0198 MA	279	void dsl_dataset_long_hold(dsl_dataset_t ds, void tag);
	280	void dsl_dataset_long_rele(dsl_dataset_t ds, void tag);
	281	boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
	282
	283	int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
831baf06	284	dsl_dataset_t origin_head, boolean_t force, void owner, dmu_tx_t *tx);
13fe0198 MA	285	void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
	286	dsl_dataset_t origin_head, dmu_tx_t tx);
	287	int dsl_dataset_snapshot_check_impl(dsl_dataset_t ds, const char snapname,
788eb90c	288	dmu_tx_t tx, boolean_t recv, uint64_t cnt, cred_t cr);
13fe0198 MA	289	void dsl_dataset_snapshot_sync_impl(dsl_dataset_t ds, const char snapname,
	290	dmu_tx_t *tx);
	291
	292	void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
	293	dmu_tx_t *tx);
	294	void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
	295	int dsl_dataset_get_snapname(dsl_dataset_t *ds);
	296	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
	297	uint64_t *value);
788eb90c JJ	298	int dsl_dataset_snap_remove(dsl_dataset_t ds, const char name, dmu_tx_t *tx,
788eb90c JJ	299	boolean_t adj_cnt);
13fe0198 MA	300	void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
13fe0198 MA	301	zprop_source_t source, uint64_t value, dmu_tx_t *tx);
da536844	302	void dsl_dataset_zapify(dsl_dataset_t ds, dmu_tx_t tx);
46ba1e59	303	int dsl_dataset_rollback(const char fsname, void owner, nvlist_t *result);
34dc7c2f BB	304
	305	#ifdef ZFS_DEBUG
	306	#define dprintf_ds(ds, fmt, ...) do { \
	307	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
79c76d5b	308	char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \
34dc7c2f BB	309	dsl_dataset_name(ds, __ds_name); \
	310	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
	311	kmem_free(__ds_name, MAXNAMELEN); \
	312	} \
	313	_NOTE(CONSTCOND) } while (0)
	314	#else
	315	#define dprintf_ds(dd, fmt, ...)
	316	#endif
	317
	318	#ifdef __cplusplus
	319	}
	320	#endif
	321
	322	#endif /* _SYS_DSL_DATASET_H */