diff options
Diffstat (limited to 'include/sys/dsl_dataset.h')
| -rw-r--r-- | include/sys/dsl_dataset.h | 114 |
1 files changed, 51 insertions, 63 deletions
diff --git a/include/sys/dsl_dataset.h b/include/sys/dsl_dataset.h index 735ccbbd3..494f11b90 100644 --- a/include/sys/dsl_dataset.h +++ b/include/sys/dsl_dataset.h @@ -35,6 +35,7 @@ #include <sys/dsl_synctask.h> #include <sys/zfs_context.h> #include <sys/dsl_deadlist.h> +#include <sys/refcount.h> #ifdef __cplusplus extern "C" { @@ -48,10 +49,8 @@ struct dsl_pool; #define DS_IS_INCONSISTENT(ds) \ ((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) /* - * NB: nopromote can not yet be set, but we want support for it in this - * on-disk version, so that we don't need to upgrade for it later. It - * will be needed when we implement 'zfs split' (where the split off - * clone should not be promoted). + * Note: nopromote can not yet be set, but we want support for it in this + * on-disk version, so that we don't need to upgrade for it later. */ #define DS_FLAG_NOPROMOTE (1ULL<<1) @@ -76,6 +75,8 @@ struct dsl_pool; */ #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 */ @@ -125,9 +126,6 @@ typedef struct dsl_dataset { dsl_deadlist_t ds_deadlist; bplist_t ds_pending_deadlist; - /* to protect against multiple concurrent incremental recv */ - kmutex_t ds_recvlock; - /* protected by lock on pool's dp_dirty_datasets list */ txg_node_t ds_dirty_link; list_node_t ds_synced_link; @@ -139,13 +137,15 @@ typedef struct dsl_dataset { kmutex_t ds_lock; objset_t *ds_objset; uint64_t ds_userrefs; + void *ds_owner; /* - * ds_owner is protected by the ds_rwlock and the ds_lock + * 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. */ - krwlock_t ds_rwlock; - kcondvar_t ds_exclusive_cv; - void *ds_owner; + refcount_t ds_longholds; /* no locking; only for making guesses */ uint64_t ds_trysnap_txg; @@ -163,76 +163,42 @@ typedef struct dsl_dataset { char ds_snapname[MAXNAMELEN]; } dsl_dataset_t; -struct dsl_ds_destroyarg { - dsl_dataset_t *ds; /* ds to destroy */ - dsl_dataset_t *rm_origin; /* also remove our origin? */ - boolean_t is_origin_rm; /* set if removing origin snap */ - boolean_t defer; /* destroy -d requested? */ - boolean_t releasing; /* destroying due to release? */ - boolean_t need_prep; /* do we need to retry due to EBUSY? */ -}; - /* * 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 -struct dsl_ds_holdarg { - dsl_sync_task_group_t *dstg; - const char *htag; - char *snapname; - boolean_t recursive; - boolean_t gotone; - boolean_t temphold; - char failed[MAXPATHLEN]; -}; - #define dsl_dataset_is_snapshot(ds) \ ((ds)->ds_phys->ds_num_children != 0) #define DS_UNIQUE_IS_ACCURATE(ds) \ (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0) -int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp); -int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, - void *tag, dsl_dataset_t **); -int dsl_dataset_own(const char *name, boolean_t inconsistentok, +int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag, + dsl_dataset_t **dsp); +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, - boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp); -void dsl_dataset_name(dsl_dataset_t *ds, char *name); -void dsl_dataset_rele(dsl_dataset_t *ds, void *tag); + void *tag, dsl_dataset_t **dsp); void dsl_dataset_disown(dsl_dataset_t *ds, void *tag); -void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag); -boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok, - void *tag); -void dsl_dataset_make_exclusive(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); void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag, minor_t minor); 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_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer); -dsl_checkfunc_t dsl_dataset_destroy_check; -dsl_syncfunc_t dsl_dataset_destroy_sync; -dsl_syncfunc_t dsl_dataset_user_hold_sync; -int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx); -void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx); -int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive); +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_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, - boolean_t force); -int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag, - boolean_t recursive, boolean_t temphold, int cleanup_fd); -int dsl_dataset_user_hold_for_send(dsl_dataset_t *ds, char *htag, - boolean_t temphold); -int dsl_dataset_user_release(char *dsname, char *snapname, char *htag, - boolean_t recursive); -int dsl_dataset_user_release_tmp(struct dsl_pool *dp, uint64_t dsobj, - char *htag, boolean_t retry); -int dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp); +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); @@ -271,13 +237,35 @@ 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_quota(const char *dsname, zprop_source_t source, +int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source, uint64_t quota); -dsl_syncfunc_t dsl_dataset_set_quota_sync; -int dsl_dataset_set_reservation(const char *dsname, zprop_source_t source, +int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source, uint64_t reservation); -int dsl_destroy_inconsistent(const char *dsname, void *arg); +boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier); +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 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); +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); +void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds, + zprop_source_t source, uint64_t value, dmu_tx_t *tx); +int dsl_dataset_rollback(const char *fsname); #ifdef ZFS_DEBUG #define dprintf_ds(ds, fmt, ...) do { \ |