FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/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 https://opensource.org/licenses/CDDL-1.0.
     * 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, 2018 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/zfs_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;
    struct dsl_key_mapping;
    struct zfs_bookmark_phys;
    
    #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"
   
   /*
    * We were receiving an incremental from a redaction bookmark, and these are the
    * guids of its snapshots.
    */
   #define DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS \
           "com.delphix:resume_redact_book_snaps"
   
   /*
    * This field is set to the ivset guid for encrypted snapshots. This is used
    * for validating raw receives.
    */
   #define DS_FIELD_IVSET_GUID     "com.datto:ivset_guid"
   
   /*
    * 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;
           struct dsl_key_mapping *ds_key_mapping;
   
           /* only used in syncing context, only valid for non-snapshots: */
           struct dsl_dataset *ds_prev;
           uint64_t ds_bookmarks_obj;  /* DMU_OTN_ZAP_METADATA */
           avl_tree_t ds_bookmarks; /* dsl_bookmark_node_t */
   
           /* 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;
           const 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.
            */
           void *ds_feature[SPA_FEATURES];
   
           /*
            * Set if we need to activate the feature on this dataset this txg
            * (used only in syncing context).
            */
           void *ds_feature_activation[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 ((dsl_dataset_phys_t *)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;
           proc_t *proc;
   } 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;
           proc_t *ddsa_proc;
   } dsl_dataset_snapshot_arg_t;
   
   typedef struct dsl_dataset_rename_snapshot_arg {
           const char *ddrsa_fsname;
           const char *ddrsa_oldsnapname;
           const char *ddrsa_newsnapname;
           boolean_t ddrsa_recursive;
           dmu_tx_t *ddrsa_tx;
   } dsl_dataset_rename_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_NONE       = 0 << 0,
           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, const void *tag,
       dsl_dataset_t **dsp);
   int dsl_dataset_hold_flags(struct dsl_pool *dp, const char *name,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
   boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
       const void *tag);
   int dsl_dataset_create_key_mapping(dsl_dataset_t *ds);
   int dsl_dataset_hold_obj_flags(struct dsl_pool *dp, uint64_t dsobj,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **);
   void dsl_dataset_remove_key_mapping(dsl_dataset_t *ds);
   int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
       const void *tag, dsl_dataset_t **);
   void dsl_dataset_rele_flags(dsl_dataset_t *ds, ds_hold_flags_t flags,
       const void *tag);
   void dsl_dataset_rele(dsl_dataset_t *ds, const void *tag);
   int dsl_dataset_own(struct dsl_pool *dp, const char *name,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
   int dsl_dataset_own_force(struct dsl_pool *dp, const char *name,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
   int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
   int dsl_dataset_own_obj_force(struct dsl_pool *dp, uint64_t dsobj,
       ds_hold_flags_t flags, const void *tag, dsl_dataset_t **dsp);
   void dsl_dataset_disown(dsl_dataset_t *ds, ds_hold_flags_t flags,
       const void *tag);
   void dsl_dataset_name(dsl_dataset_t *ds, char *name);
   boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, const void *tag,
       boolean_t override);
   int dsl_dataset_namelen(dsl_dataset_t *ds);
   boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
   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_token(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_redacted(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);
   void dsl_get_redact_snaps(dsl_dataset_t *ds, nvlist_t *propval);
   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 *newds,
       uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
   int dsl_dataset_space_written_bookmark(struct zfs_bookmark_phys *bmp,
       dsl_dataset_t *newds, 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);
   int dsl_dataset_set_compression(const char *dsname, zprop_source_t source,
       uint64_t compression);
   
   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, const void *tag);
   void dsl_dataset_long_rele(dsl_dataset_t *ds, const 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, proc_t *proc);
   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);
   
   int dsl_dataset_rename_snapshot_check(void *arg, dmu_tx_t *tx);
   void dsl_dataset_rename_snapshot_sync(void *arg, dmu_tx_t *tx);
   
   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, void *arg,
       dmu_tx_t *tx);
   void dsl_dataset_deactivate_feature(dsl_dataset_t *ds, spa_feature_t f,
       dmu_tx_t *tx);
   boolean_t dsl_dataset_feature_is_active(dsl_dataset_t *ds, spa_feature_t f);
   boolean_t dsl_dataset_get_uint64_array_feature(dsl_dataset_t *ds,
       spa_feature_t f, uint64_t *outlength, uint64_t **outp);
   
   void dsl_dataset_activate_redaction(dsl_dataset_t *ds, uint64_t *redact_snaps,
       uint64_t num_redact_snaps, dmu_tx_t *tx);
   
   int dsl_dataset_oldest_snapshot(spa_t *spa, uint64_t head_ds, uint64_t min_txg,
       uint64_t *oldest_dsobj);
   
   #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); \
           } \
   } while (0)
   #else
   #define dprintf_ds(dd, fmt, ...)
   #endif
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif /* _SYS_DSL_DATASET_H */

Cache object: c0b4914d6cad7adc56a0b7d5a6b15bf3