[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) 2011, 2017 by Delphix. 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>
#include <sys/rrwlock.h>
#include <sys/dsl_crypt.h>
#include <zfeature_common.h>

#ifdef	__cplusplus
extern "C" {
#endif

struct dsl_dataset;
struct dsl_dir;
struct dsl_pool;
struct dsl_crypto_params;

#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
 * dnodes (>512B).  If it is present, then this dataset is counted in the
 * refcount of the SPA_FEATURE_LARGE_DNODE feature.
 */
#define	DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode"

/*
 * These fields are set on datasets that are in the middle of a resumable
 * receive, and allow the sender to resume the send if it is interrupted.
 */
#define	DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid"
#define	DS_FIELD_RESUME_TONAME "com.delphix:resume_toname"
#define	DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid"
#define	DS_FIELD_RESUME_OBJECT "com.delphix:resume_object"
#define	DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset"
#define	DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes"
#define	DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok"
#define	DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok"
#define	DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok"
#define	DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok"

/*
 * This field is set to the object number of the remap deadlist if one exists.
 */
#define	DS_FIELD_REMAP_DEADLIST	"com.delphix:remap_deadlist"

/*
 * 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;
	rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */

	/* 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 */

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

	/*
	 * The remap deadlist contains blocks (DVA's, really) that are
	 * referenced by the previous snapshot and point to indirect vdevs,
	 * but in this dataset they have been remapped to point to concrete
	 * (or at least, less-indirect) vdevs.  In other words, the
	 * physical DVA is referenced by the previous snapshot but not by
	 * this dataset.  Logically, the DVA continues to be referenced,
	 * but we are using a different (less indirect) physical DVA.
	 * This deadlist is used to determine when physical DVAs that
	 * point to indirect vdevs are no longer referenced anywhere,
	 * and thus should be marked obsolete.
	 *
	 * This is only used if SPA_FEATURE_OBSOLETE_COUNTS is enabled.
	 */
	dsl_deadlist_t ds_remap_deadlist;
	/* protects creation of the ds_remap_deadlist */
	kmutex_t ds_remap_deadlist_lock;

	/* 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.
	 */
	zfs_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;

	/*
	 * When in the middle of a resumable receive, tracks how much
	 * progress we have made.
	 */
	uint64_t ds_resume_object[TXG_SIZE];
	uint64_t ds_resume_offset[TXG_SIZE];
	uint64_t ds_resume_bytes[TXG_SIZE];

	/* Protected by our dsl_dir's dd_lock */
	list_t ds_prop_cbs;

	/*
	 * For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
	 * uses this feature.
	 */
	uint8_t ds_feature_inuse[SPA_FEATURES];

	/*
	 * Set if we need to activate the feature on this dataset this txg
	 * (used only in syncing context).
	 */
	uint8_t ds_feature_activation_needed[SPA_FEATURES];

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

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

typedef struct dsl_dataset_promote_arg {
	const char *ddpa_clonename;
	dsl_dataset_t *ddpa_clone;
	list_t shared_snaps, origin_snaps, clone_snaps;
	dsl_dataset_t *origin_origin; /* origin of the origin */
	uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap;
	nvlist_t *err_ds;
	cred_t *cr;
} dsl_dataset_promote_arg_t;

typedef struct dsl_dataset_rollback_arg {
	const char *ddra_fsname;
	const char *ddra_tosnap;
	void *ddra_owner;
	nvlist_t *ddra_result;
} dsl_dataset_rollback_arg_t;

typedef struct dsl_dataset_snapshot_arg {
	nvlist_t *ddsa_snaps;
	nvlist_t *ddsa_props;
	nvlist_t *ddsa_errors;
	cred_t *ddsa_cr;
} dsl_dataset_snapshot_arg_t;

/*
 * 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	dsl_dataset_is_snapshot(ds) \
	(dsl_dataset_phys(ds)->ds_num_children != 0)

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

/* flags for holding the dataset */
typedef enum ds_hold_flags {
	DS_HOLD_FLAG_DECRYPT	= 1 << 0 /* needs access to encrypted data */
} ds_hold_flags_t;

int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
    dsl_dataset_t **dsp);
int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name,
    ds_hold_flags_t flags, 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 **);
int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
    ds_hold_flags_t flags, void *tag, dsl_dataset_t **);
void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
    void *tag);
int dsl_dataset_own(struct dsl_pool *dp, const char *name,
    ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
    ds_hold_flags_t flags, void *tag, dsl_dataset_t **dsp);
void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags, void *tag);
void dsl_dataset_name(dsl_dataset_t *ds, char *name);
int dsl_dataset_namelen(dsl_dataset_t *ds);
boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
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 *,
    struct dsl_crypto_params *, dmu_tx_t *);
uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
    struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx);
void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx);
int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx);
int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx);
int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx);
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);

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 *ds, zio_t *zio, dmu_tx_t *tx);
void dsl_dataset_sync_done(dsl_dataset_t *ds, 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);
void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev,
    uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx);
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);

int get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val);
char *get_receive_resume_stats_impl(dsl_dataset_t *ds);
char *get_child_receive_stats(dsl_dataset_t *ds);
uint64_t dsl_get_refratio(dsl_dataset_t *ds);
uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds);
uint64_t dsl_get_compressratio(dsl_dataset_t *ds);
uint64_t dsl_get_used(dsl_dataset_t *ds);
uint64_t dsl_get_creation(dsl_dataset_t *ds);
uint64_t dsl_get_creationtxg(dsl_dataset_t *ds);
uint64_t dsl_get_refquota(dsl_dataset_t *ds);
uint64_t dsl_get_refreservation(dsl_dataset_t *ds);
uint64_t dsl_get_guid(dsl_dataset_t *ds);
uint64_t dsl_get_unique(dsl_dataset_t *ds);
uint64_t dsl_get_objsetid(dsl_dataset_t *ds);
uint64_t dsl_get_userrefs(dsl_dataset_t *ds);
uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds);
uint64_t dsl_get_referenced(dsl_dataset_t *ds);
uint64_t dsl_get_numclones(dsl_dataset_t *ds);
uint64_t dsl_get_inconsistent(dsl_dataset_t *ds);
uint64_t dsl_get_available(dsl_dataset_t *ds);
int dsl_get_written(dsl_dataset_t *ds, uint64_t *written);
int dsl_get_prev_snap(dsl_dataset_t *ds, char *snap);
int dsl_get_mountpoint(dsl_dataset_t *ds, const char *dsname, char *value,
    char *source);

void get_clones_stat(dsl_dataset_t *ds, nvlist_t *nv);
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);

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);
boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);

int dsl_dataset_rollback_check(void *arg, dmu_tx_t *tx);
void dsl_dataset_rollback_sync(void *arg, dmu_tx_t *tx);
int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
    nvlist_t *result);

uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds);
void dsl_dataset_create_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);
boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds);
void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t *ds, dmu_tx_t *tx);

void dsl_dataset_activate_feature(uint64_t dsobj,
    spa_feature_t f, dmu_tx_t *tx);
void dsl_dataset_deactivate_feature(uint64_t dsobj,
    spa_feature_t f, dmu_tx_t *tx);

#ifdef ZFS_DEBUG
#define	dprintf_ds(ds, fmt, ...) do { \
	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
	char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
	dsl_dataset_name(ds, __ds_name); \
	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
	kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
	} \
_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.
af073689	23	* Copyright (c) 2011, 2017 by Delphix. All rights reserved.
95fd54a1	24	* Copyright (c) 2013 Steven Hartland. All rights reserved.
0c66c32d	25	* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
34dc7c2f BB	26	*/
	27
	28	#ifndef _SYS_DSL_DATASET_H
	29	#define _SYS_DSL_DATASET_H
	30
34dc7c2f BB	31	#include <sys/dmu.h>
	32	#include <sys/spa.h>
	33	#include <sys/txg.h>
	34	#include <sys/zio.h>
	35	#include <sys/bplist.h>
	36	#include <sys/dsl_synctask.h>
	37	#include <sys/zfs_context.h>
428870ff	38	#include <sys/dsl_deadlist.h>
13fe0198	39	#include <sys/refcount.h>
cc9bb3e5	40	#include <sys/rrwlock.h>
b5256303	41	#include <sys/dsl_crypt.h>
241b5415	42	#include <zfeature_common.h>
34dc7c2f BB	43
	44	#ifdef __cplusplus
	45	extern "C" {
	46	#endif
	47
	48	struct dsl_dataset;
	49	struct dsl_dir;
	50	struct dsl_pool;
b5256303	51	struct dsl_crypto_params;
34dc7c2f	52
34dc7c2f	53	#define DS_FLAG_INCONSISTENT (1ULL<<0)
b128c09f	54	#define DS_IS_INCONSISTENT(ds) \
d683ddbb	55	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
fa86b5db	56
34dc7c2f	57	/*
fa86b5db	58	* Do not allow this dataset to be promoted.
34dc7c2f BB	59	*/
	60	#define DS_FLAG_NOPROMOTE (1ULL<<1)
	61
	62	/*
	63	* DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
	64	* calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
	65	* refquota/refreservations).
	66	*/
	67	#define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
	68
45d1cae3 BB	69	/*
	70	* DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
	71	* on a dataset. This allows the dataset to be destroyed using 'zfs release'.
	72	*/
	73	#define DS_FLAG_DEFER_DESTROY (1ULL<<3)
	74	#define DS_IS_DEFER_DESTROY(ds) \
d683ddbb	75	(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
45d1cae3	76
fa86b5db MA	77	/*
	78	* DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
	79	* They should be of the format <reverse-dns>:<field>.
	80	*/
	81
da536844 MA	82	/*
	83	* This field's value is the object ID of a zap object which contains the
	84	* bookmarks of this dataset. If it is present, then this dataset is counted
	85	* in the refcount of the SPA_FEATURES_BOOKMARKS feature.
	86	*/
	87	#define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
	88
50c957f7 NB	89	/*
	90	* This field is present (with value=0) if this dataset may contain large
	91	* dnodes (>512B). If it is present, then this dataset is counted in the
	92	* refcount of the SPA_FEATURE_LARGE_DNODE feature.
	93	*/
	94	#define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode"
	95
47dfff3b MA	96	/*
	97	* These fields are set on datasets that are in the middle of a resumable
	98	* receive, and allow the sender to resume the send if it is interrupted.
	99	*/
	100	#define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid"
	101	#define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname"
	102	#define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid"
	103	#define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object"
	104	#define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset"
	105	#define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes"
2aa34383	106	#define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok"
47dfff3b	107	#define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok"
2aa34383	108	#define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok"
b5256303	109	#define DS_FIELD_RESUME_RAWOK "com.datto:resume_rawok"
47dfff3b	110
a1d477c2 MA	111	/*
	112	* This field is set to the object number of the remap deadlist if one exists.
	113	*/
	114	#define DS_FIELD_REMAP_DEADLIST "com.delphix:remap_deadlist"
	115
34dc7c2f BB	116	/*
	117	* DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
	118	* name lookups should be performed case-insensitively.
	119	*/
	120	#define DS_FLAG_CI_DATASET (1ULL<<16)
	121
13fe0198 MA	122	#define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
13fe0198 MA	123
34dc7c2f	124	typedef struct dsl_dataset_phys {
b128c09f BB	125	uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
b128c09f BB	126	uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
34dc7c2f	127	uint64_t ds_prev_snap_txg;
b128c09f BB	128	uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
b128c09f BB	129	uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
34dc7c2f BB	130	uint64_t ds_num_children; /* clone/snap children; ==0 for head */
	131	uint64_t ds_creation_time; /* seconds since 1970 */
	132	uint64_t ds_creation_txg;
428870ff	133	uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
9ae529ec CS	134	/*
	135	* ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
	136	* include all blocks referenced by this dataset, including those
	137	* shared with any other datasets.
	138	*/
	139	uint64_t ds_referenced_bytes;
34dc7c2f BB	140	uint64_t ds_compressed_bytes;
	141	uint64_t ds_uncompressed_bytes;
	142	uint64_t ds_unique_bytes; /* only relevant to snapshots */
	143	/*
	144	* The ds_fsid_guid is a 56-bit ID that can change to avoid
	145	* collisions. The ds_guid is a 64-bit ID that will never
	146	* change, so there is a small probability that it will collide.
	147	*/
	148	uint64_t ds_fsid_guid;
	149	uint64_t ds_guid;
b128c09f	150	uint64_t ds_flags; /* DS_FLAG_* */
34dc7c2f	151	blkptr_t ds_bp;
b128c09f BB	152	uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
b128c09f BB	153	uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
45d1cae3 BB	154	uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
45d1cae3 BB	155	uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
34dc7c2f BB	156	} dsl_dataset_phys_t;
	157
	158	typedef struct dsl_dataset {
0c66c32d	159	dmu_buf_user_t ds_dbu;
cc9bb3e5	160	rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */
0c66c32d	161
34dc7c2f BB	162	/* Immutable: */
34dc7c2f BB	163	struct dsl_dir *ds_dir;
34dc7c2f BB	164	dmu_buf_t *ds_dbuf;
	165	uint64_t ds_object;
	166	uint64_t ds_fsid_guid;
0c66c32d	167	boolean_t ds_is_snapshot;
34dc7c2f	168
b128c09f BB	169	/* only used in syncing context, only valid for non-snapshots: */
b128c09f BB	170	struct dsl_dataset *ds_prev;
da536844	171	uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
34dc7c2f BB	172
34dc7c2f BB	173	/* has internal locking: */
428870ff BB	174	dsl_deadlist_t ds_deadlist;
428870ff BB	175	bplist_t ds_pending_deadlist;
34dc7c2f	176
a1d477c2 MA	177	/*
	178	* The remap deadlist contains blocks (DVA's, really) that are
	179	* referenced by the previous snapshot and point to indirect vdevs,
	180	* but in this dataset they have been remapped to point to concrete
	181	* (or at least, less-indirect) vdevs. In other words, the
	182	* physical DVA is referenced by the previous snapshot but not by
	183	* this dataset. Logically, the DVA continues to be referenced,
	184	* but we are using a different (less indirect) physical DVA.
	185	* This deadlist is used to determine when physical DVAs that
	186	* point to indirect vdevs are no longer referenced anywhere,
	187	* and thus should be marked obsolete.
	188	*
	189	* This is only used if SPA_FEATURE_OBSOLETE_COUNTS is enabled.
	190	*/
	191	dsl_deadlist_t ds_remap_deadlist;
	192	/* protects creation of the ds_remap_deadlist */
	193	kmutex_t ds_remap_deadlist_lock;
	194
34dc7c2f BB	195	/* protected by lock on pool's dp_dirty_datasets list */
	196	txg_node_t ds_dirty_link;
	197	list_node_t ds_synced_link;
	198
	199	/*
	200	* ds_phys->ds_<accounting> is also protected by ds_lock.
	201	* Protected by ds_lock:
	202	*/
	203	kmutex_t ds_lock;
428870ff	204	objset_t *ds_objset;
45d1cae3	205	uint64_t ds_userrefs;
13fe0198	206	void *ds_owner;
b128c09f BB	207
b128c09f BB	208	/*
13fe0198 MA	209	* Long holds prevent the ds from being destroyed; they allow the
	210	* ds to remain held even after dropping the dp_config_rwlock.
	211	* Owning counts as a long hold. See the comments above
	212	* dsl_pool_hold() for details.
b128c09f	213	*/
c13060e4	214	zfs_refcount_t ds_longholds;
34dc7c2f BB	215
	216	/* no locking; only for making guesses */
	217	uint64_t ds_trysnap_txg;
	218
	219	/* for objset_open() */
	220	kmutex_t ds_opening_lock;
	221
	222	uint64_t ds_reserved; /* cached refreservation */
	223	uint64_t ds_quota; /* cached refquota */
	224
37abac6d BP	225	kmutex_t ds_sendstream_lock;
	226	list_t ds_sendstreams;
	227
47dfff3b MA	228	/*
	229	* When in the middle of a resumable receive, tracks how much
	230	* progress we have made.
	231	*/
	232	uint64_t ds_resume_object[TXG_SIZE];
	233	uint64_t ds_resume_offset[TXG_SIZE];
	234	uint64_t ds_resume_bytes[TXG_SIZE];
	235
0eb21616 JG	236	/* Protected by our dsl_dir's dd_lock */
	237	list_t ds_prop_cbs;
	238
241b5415 MA	239	/*
	240	* For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
	241	* uses this feature.
	242	*/
	243	uint8_t ds_feature_inuse[SPA_FEATURES];
	244
	245	/*
	246	* Set if we need to activate the feature on this dataset this txg
	247	* (used only in syncing context).
	248	*/
	249	uint8_t ds_feature_activation_needed[SPA_FEATURES];
	250
34dc7c2f	251	/* Protected by ds_lock; keep at end of struct for better locality */
eca7b760	252	char ds_snapname[ZFS_MAX_DATASET_NAME_LEN];
34dc7c2f BB	253	} dsl_dataset_t;
34dc7c2f BB	254
d683ddbb JG	255	static inline dsl_dataset_phys_t *
	256	dsl_dataset_phys(dsl_dataset_t *ds)
	257	{
	258	return (ds->ds_dbuf->db_data);
	259	}
	260
d99a0153 CW	261	typedef struct dsl_dataset_promote_arg {
	262	const char *ddpa_clonename;
	263	dsl_dataset_t *ddpa_clone;
	264	list_t shared_snaps, origin_snaps, clone_snaps;
	265	dsl_dataset_t origin_origin; / origin of the origin */
	266	uint64_t used, comp, uncomp, unique, cloneusedsnap, originusedsnap;
	267	nvlist_t *err_ds;
	268	cred_t *cr;
	269	} dsl_dataset_promote_arg_t;
	270
af073689 BL	271	typedef struct dsl_dataset_rollback_arg {
	272	const char *ddra_fsname;
	273	const char *ddra_tosnap;
	274	void *ddra_owner;
	275	nvlist_t *ddra_result;
	276	} dsl_dataset_rollback_arg_t;
	277
234c91c5 CW	278	typedef struct dsl_dataset_snapshot_arg {
	279	nvlist_t *ddsa_snaps;
	280	nvlist_t *ddsa_props;
	281	nvlist_t *ddsa_errors;
	282	cred_t *ddsa_cr;
	283	} dsl_dataset_snapshot_arg_t;
	284
572e2857 BB	285	/*
	286	* The max length of a temporary tag prefix is the number of hex digits
	287	* required to express UINT64_MAX plus one for the hyphen.
	288	*/
	289	#define MAX_TAG_PREFIX_LEN 17
	290
5dc8b736 MG	291	#define dsl_dataset_is_snapshot(ds) \
	292	(dsl_dataset_phys(ds)->ds_num_children != 0)
	293
34dc7c2f	294	#define DS_UNIQUE_IS_ACCURATE(ds) \
d683ddbb	295	((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
34dc7c2f	296
b5256303 TC	297	/* flags for holding the dataset */
	298	typedef enum ds_hold_flags {
	299	DS_HOLD_FLAG_DECRYPT = 1 << 0 /* needs access to encrypted data */
	300	} ds_hold_flags_t;
	301
13fe0198 MA	302	int dsl_dataset_hold(struct dsl_pool dp, const char name, void *tag,
13fe0198 MA	303	dsl_dataset_t **dsp);
b5256303 TC	304	int dsl_dataset_hold_flags(struct dsl_pool dp, const char name,
b5256303 TC	305	ds_hold_flags_t flags, void tag, dsl_dataset_t *dsp);
6ebebace JG	306	boolean_t dsl_dataset_try_add_ref(struct dsl_pool dp, dsl_dataset_t ds,
6ebebace JG	307	void *tag);
13fe0198 MA	308	int dsl_dataset_hold_obj(struct dsl_pool dp, uint64_t dsobj, void tag,
13fe0198 MA	309	dsl_dataset_t **);
b5256303 TC	310	int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
b5256303 TC	311	ds_hold_flags_t flags, void tag, dsl_dataset_t *);
13fe0198	312	void dsl_dataset_rele(dsl_dataset_t ds, void tag);
b5256303 TC	313	void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
b5256303 TC	314	void *tag);
13fe0198	315	int dsl_dataset_own(struct dsl_pool dp, const char name,
b5256303	316	ds_hold_flags_t flags, void tag, dsl_dataset_t *dsp);
b128c09f	317	int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
b5256303 TC	318	ds_hold_flags_t flags, void tag, dsl_dataset_t *dsp);
b5256303 TC	319	void dsl_dataset_disown(dsl_dataset_t ds, ds_hold_flags_t flags, void tag);
13fe0198	320	void dsl_dataset_name(dsl_dataset_t ds, char name);
eca7b760	321	int dsl_dataset_namelen(dsl_dataset_t *ds);
47dfff3b	322	boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
b5256303	323	boolean_t dsl_dataset_tryown(dsl_dataset_t ds, void tag);
b128c09f	324	uint64_t dsl_dataset_create_sync(dsl_dir_t pds, const char lastname,
b5256303 TC	325	dsl_dataset_t origin, uint64_t flags, cred_t ,
b5256303 TC	326	struct dsl_crypto_params , dmu_tx_t );
b128c09f	327	uint64_t dsl_dataset_create_sync_dd(dsl_dir_t dd, dsl_dataset_t origin,
b5256303	328	struct dsl_crypto_params dcp, uint64_t flags, dmu_tx_t tx);
234c91c5 CW	329	void dsl_dataset_snapshot_sync(void arg, dmu_tx_t tx);
234c91c5 CW	330	int dsl_dataset_snapshot_check(void arg, dmu_tx_t tx);
13fe0198	331	int dsl_dataset_snapshot(nvlist_t snaps, nvlist_t props, nvlist_t *errors);
d99a0153 CW	332	void dsl_dataset_promote_sync(void arg, dmu_tx_t tx);
d99a0153 CW	333	int dsl_dataset_promote_check(void arg, dmu_tx_t tx);
428870ff	334	int dsl_dataset_promote(const char name, char conflsnap);
13fe0198 MA	335	int dsl_dataset_rename_snapshot(const char *fsname,
	336	const char oldsnapname, const char newsnapname, boolean_t recursive);
	337	int dsl_dataset_snapshot_tmp(const char fsname, const char snapname,
	338	minor_t cleanup_minor, const char *htag);
34dc7c2f	339
34dc7c2f	340	blkptr_t dsl_dataset_get_blkptr(dsl_dataset_t ds);
34dc7c2f BB	341
	342	spa_t dsl_dataset_get_spa(dsl_dataset_t ds);
	343
19580676 MA	344	boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
19580676 MA	345	dsl_dataset_t *snap);
34dc7c2f	346
cdc15a76 DW	347	void dsl_dataset_sync(dsl_dataset_t ds, zio_t zio, dmu_tx_t *tx);
cdc15a76 DW	348	void dsl_dataset_sync_done(dsl_dataset_t ds, dmu_tx_t tx);
34dc7c2f	349
428870ff	350	void dsl_dataset_block_born(dsl_dataset_t ds, const blkptr_t bp,
34dc7c2f	351	dmu_tx_t *tx);
428870ff BB	352	int dsl_dataset_block_kill(dsl_dataset_t ds, const blkptr_t bp,
428870ff BB	353	dmu_tx_t *tx, boolean_t async);
a1d477c2 MA	354	void dsl_dataset_block_remapped(dsl_dataset_t *ds, uint64_t vdev,
a1d477c2 MA	355	uint64_t offset, uint64_t size, uint64_t birth, dmu_tx_t *tx);
6772fb67 BB	356	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
6772fb67 BB	357	uint64_t *value);
34dc7c2f BB	358
34dc7c2f BB	359	void dsl_dataset_dirty(dsl_dataset_t ds, dmu_tx_t tx);
d99a0153 CW	360
	361	int get_clones_stat_impl(dsl_dataset_t ds, nvlist_t val);
	362	char get_receive_resume_stats_impl(dsl_dataset_t ds);
	363	char get_child_receive_stats(dsl_dataset_t ds);
	364	uint64_t dsl_get_refratio(dsl_dataset_t *ds);
	365	uint64_t dsl_get_logicalreferenced(dsl_dataset_t *ds);
	366	uint64_t dsl_get_compressratio(dsl_dataset_t *ds);
	367	uint64_t dsl_get_used(dsl_dataset_t *ds);
	368	uint64_t dsl_get_creation(dsl_dataset_t *ds);
	369	uint64_t dsl_get_creationtxg(dsl_dataset_t *ds);
	370	uint64_t dsl_get_refquota(dsl_dataset_t *ds);
	371	uint64_t dsl_get_refreservation(dsl_dataset_t *ds);
	372	uint64_t dsl_get_guid(dsl_dataset_t *ds);
	373	uint64_t dsl_get_unique(dsl_dataset_t *ds);
	374	uint64_t dsl_get_objsetid(dsl_dataset_t *ds);
	375	uint64_t dsl_get_userrefs(dsl_dataset_t *ds);
	376	uint64_t dsl_get_defer_destroy(dsl_dataset_t *ds);
	377	uint64_t dsl_get_referenced(dsl_dataset_t *ds);
	378	uint64_t dsl_get_numclones(dsl_dataset_t *ds);
	379	uint64_t dsl_get_inconsistent(dsl_dataset_t *ds);
	380	uint64_t dsl_get_available(dsl_dataset_t *ds);
	381	int dsl_get_written(dsl_dataset_t ds, uint64_t written);
	382	int dsl_get_prev_snap(dsl_dataset_t ds, char snap);
	383	int dsl_get_mountpoint(dsl_dataset_t ds, const char dsname, char *value,
	384	char *source);
	385
	386	void get_clones_stat(dsl_dataset_t ds, nvlist_t nv);
	387	void dsl_dataset_stats(dsl_dataset_t os, nvlist_t nv);
	388
34dc7c2f BB	389	void dsl_dataset_fast_stat(dsl_dataset_t ds, dmu_objset_stats_t stat);
	390	void dsl_dataset_space(dsl_dataset_t *ds,
	391	uint64_t refdbytesp, uint64_t availbytesp,
	392	uint64_t usedobjsp, uint64_t availobjsp);
	393	uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
330d06f9 MA	394	int dsl_dataset_space_written(dsl_dataset_t oldsnap, dsl_dataset_t new,
	395	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
	396	int dsl_dataset_space_wouldfree(dsl_dataset_t firstsnap, dsl_dataset_t last,
	397	uint64_t usedp, uint64_t compp, uint64_t *uncompp);
34dc7c2f	398
34dc7c2f BB	399	int dsl_dsobj_to_dsname(char pname, uint64_t obj, char buf);
	400
	401	int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
	402	uint64_t asize, uint64_t inflight, uint64_t *used,
	403	uint64_t *ref_rsrv);
13fe0198	404	int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
428870ff	405	uint64_t quota);
13fe0198	406	int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
428870ff BB	407	uint64_t reservation);
428870ff BB	408
da536844 MA	409	boolean_t dsl_dataset_is_before(dsl_dataset_t later, dsl_dataset_t earlier,
da536844 MA	410	uint64_t earlier_txg);
13fe0198 MA	411	void dsl_dataset_long_hold(dsl_dataset_t ds, void tag);
	412	void dsl_dataset_long_rele(dsl_dataset_t ds, void tag);
	413	boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
	414
	415	int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
831baf06	416	dsl_dataset_t origin_head, boolean_t force, void owner, dmu_tx_t *tx);
13fe0198 MA	417	void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
	418	dsl_dataset_t origin_head, dmu_tx_t tx);
	419	int dsl_dataset_snapshot_check_impl(dsl_dataset_t ds, const char snapname,
788eb90c	420	dmu_tx_t tx, boolean_t recv, uint64_t cnt, cred_t cr);
13fe0198 MA	421	void dsl_dataset_snapshot_sync_impl(dsl_dataset_t ds, const char snapname,
	422	dmu_tx_t *tx);
	423
	424	void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
	425	dmu_tx_t *tx);
	426	void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
	427	int dsl_dataset_get_snapname(dsl_dataset_t *ds);
	428	int dsl_dataset_snap_lookup(dsl_dataset_t ds, const char name,
	429	uint64_t *value);
788eb90c JJ	430	int dsl_dataset_snap_remove(dsl_dataset_t ds, const char name, dmu_tx_t *tx,
788eb90c JJ	431	boolean_t adj_cnt);
13fe0198 MA	432	void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
13fe0198 MA	433	zprop_source_t source, uint64_t value, dmu_tx_t *tx);
da536844	434	void dsl_dataset_zapify(dsl_dataset_t ds, dmu_tx_t tx);
47dfff3b MA	435	boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
47dfff3b MA	436	boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);
af073689 BL	437
	438	int dsl_dataset_rollback_check(void arg, dmu_tx_t tx);
	439	void dsl_dataset_rollback_sync(void arg, dmu_tx_t tx);
8ca78ab0 AG	440	int dsl_dataset_rollback(const char fsname, const char tosnap, void *owner,
8ca78ab0 AG	441	nvlist_t *result);
34dc7c2f	442
a1d477c2 MA	443	uint64_t dsl_dataset_get_remap_deadlist_object(dsl_dataset_t *ds);
	444	void dsl_dataset_create_remap_deadlist(dsl_dataset_t ds, dmu_tx_t tx);
	445	boolean_t dsl_dataset_remap_deadlist_exists(dsl_dataset_t *ds);
	446	void dsl_dataset_destroy_remap_deadlist(dsl_dataset_t ds, dmu_tx_t tx);
	447
b5256303 TC	448	void dsl_dataset_activate_feature(uint64_t dsobj,
b5256303 TC	449	spa_feature_t f, dmu_tx_t *tx);
241b5415 MA	450	void dsl_dataset_deactivate_feature(uint64_t dsobj,
	451	spa_feature_t f, dmu_tx_t *tx);
	452
34dc7c2f BB	453	#ifdef ZFS_DEBUG
	454	#define dprintf_ds(ds, fmt, ...) do { \
	455	if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
eca7b760	456	char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
34dc7c2f BB	457	dsl_dataset_name(ds, __ds_name); \
34dc7c2f BB	458	dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
eca7b760	459	kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
34dc7c2f BB	460	} \
	461	_NOTE(CONSTCOND) } while (0)
	462	#else
	463	#define dprintf_ds(dd, fmt, ...)
	464	#endif
	465
	466	#ifdef __cplusplus
	467	}
	468	#endif
	469
	470	#endif /* _SYS_DSL_DATASET_H */