367 lines
13 KiB
C
367 lines
13 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
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* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
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* Copyright (c) 2013 Steven Hartland. All rights reserved.
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* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
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*/
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#ifndef _SYS_DSL_DATASET_H
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#define _SYS_DSL_DATASET_H
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#include <sys/dmu.h>
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#include <sys/spa.h>
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#include <sys/txg.h>
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#include <sys/zio.h>
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#include <sys/bplist.h>
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#include <sys/dsl_synctask.h>
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#include <sys/zfs_context.h>
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#include <sys/dsl_deadlist.h>
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#include <sys/refcount.h>
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#include <sys/rrwlock.h>
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#include <zfeature_common.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct dsl_dataset;
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struct dsl_dir;
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struct dsl_pool;
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#define DS_FLAG_INCONSISTENT (1ULL<<0)
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#define DS_IS_INCONSISTENT(ds) \
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(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_INCONSISTENT)
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/*
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* Do not allow this dataset to be promoted.
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*/
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#define DS_FLAG_NOPROMOTE (1ULL<<1)
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/*
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* DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly
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* calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE,
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* refquota/refreservations).
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*/
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#define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2)
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/*
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* DS_FLAG_DEFER_DESTROY is set after 'zfs destroy -d' has been called
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* on a dataset. This allows the dataset to be destroyed using 'zfs release'.
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*/
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#define DS_FLAG_DEFER_DESTROY (1ULL<<3)
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#define DS_IS_DEFER_DESTROY(ds) \
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(dsl_dataset_phys(ds)->ds_flags & DS_FLAG_DEFER_DESTROY)
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/*
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* DS_FIELD_* are strings that are used in the "extensified" dataset zap object.
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* They should be of the format <reverse-dns>:<field>.
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*/
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/*
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* This field's value is the object ID of a zap object which contains the
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* bookmarks of this dataset. If it is present, then this dataset is counted
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* in the refcount of the SPA_FEATURES_BOOKMARKS feature.
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*/
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#define DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
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/*
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* This field is present (with value=0) if this dataset may contain large
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* dnodes (>512B). If it is present, then this dataset is counted in the
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* refcount of the SPA_FEATURE_LARGE_DNODE feature.
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*/
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#define DS_FIELD_LARGE_DNODE "org.zfsonlinux:large_dnode"
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/*
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* These fields are set on datasets that are in the middle of a resumable
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* receive, and allow the sender to resume the send if it is interrupted.
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*/
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#define DS_FIELD_RESUME_FROMGUID "com.delphix:resume_fromguid"
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#define DS_FIELD_RESUME_TONAME "com.delphix:resume_toname"
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#define DS_FIELD_RESUME_TOGUID "com.delphix:resume_toguid"
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#define DS_FIELD_RESUME_OBJECT "com.delphix:resume_object"
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#define DS_FIELD_RESUME_OFFSET "com.delphix:resume_offset"
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#define DS_FIELD_RESUME_BYTES "com.delphix:resume_bytes"
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#define DS_FIELD_RESUME_LARGEBLOCK "com.delphix:resume_largeblockok"
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#define DS_FIELD_RESUME_EMBEDOK "com.delphix:resume_embedok"
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#define DS_FIELD_RESUME_COMPRESSOK "com.delphix:resume_compressok"
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/*
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* DS_FLAG_CI_DATASET is set if the dataset contains a file system whose
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* name lookups should be performed case-insensitively.
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*/
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#define DS_FLAG_CI_DATASET (1ULL<<16)
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#define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
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typedef struct dsl_dataset_phys {
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uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
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uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
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uint64_t ds_prev_snap_txg;
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uint64_t ds_next_snap_obj; /* DMU_OT_DSL_DATASET */
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uint64_t ds_snapnames_zapobj; /* DMU_OT_DSL_DS_SNAP_MAP 0 for snaps */
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uint64_t ds_num_children; /* clone/snap children; ==0 for head */
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uint64_t ds_creation_time; /* seconds since 1970 */
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uint64_t ds_creation_txg;
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uint64_t ds_deadlist_obj; /* DMU_OT_DEADLIST */
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/*
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* ds_referenced_bytes, ds_compressed_bytes, and ds_uncompressed_bytes
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* include all blocks referenced by this dataset, including those
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* shared with any other datasets.
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*/
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uint64_t ds_referenced_bytes;
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uint64_t ds_compressed_bytes;
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uint64_t ds_uncompressed_bytes;
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uint64_t ds_unique_bytes; /* only relevant to snapshots */
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/*
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* The ds_fsid_guid is a 56-bit ID that can change to avoid
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* collisions. The ds_guid is a 64-bit ID that will never
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* change, so there is a small probability that it will collide.
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*/
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uint64_t ds_fsid_guid;
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uint64_t ds_guid;
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uint64_t ds_flags; /* DS_FLAG_* */
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blkptr_t ds_bp;
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uint64_t ds_next_clones_obj; /* DMU_OT_DSL_CLONES */
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uint64_t ds_props_obj; /* DMU_OT_DSL_PROPS for snaps */
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uint64_t ds_userrefs_obj; /* DMU_OT_USERREFS */
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uint64_t ds_pad[5]; /* pad out to 320 bytes for good measure */
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} dsl_dataset_phys_t;
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typedef struct dsl_dataset {
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dmu_buf_user_t ds_dbu;
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rrwlock_t ds_bp_rwlock; /* Protects ds_phys->ds_bp */
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/* Immutable: */
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struct dsl_dir *ds_dir;
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dmu_buf_t *ds_dbuf;
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uint64_t ds_object;
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uint64_t ds_fsid_guid;
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boolean_t ds_is_snapshot;
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/* only used in syncing context, only valid for non-snapshots: */
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struct dsl_dataset *ds_prev;
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uint64_t ds_bookmarks; /* DMU_OTN_ZAP_METADATA */
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/* has internal locking: */
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dsl_deadlist_t ds_deadlist;
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bplist_t ds_pending_deadlist;
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/* protected by lock on pool's dp_dirty_datasets list */
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txg_node_t ds_dirty_link;
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list_node_t ds_synced_link;
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/*
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* ds_phys->ds_<accounting> is also protected by ds_lock.
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* Protected by ds_lock:
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*/
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kmutex_t ds_lock;
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objset_t *ds_objset;
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uint64_t ds_userrefs;
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void *ds_owner;
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/*
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* Long holds prevent the ds from being destroyed; they allow the
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* ds to remain held even after dropping the dp_config_rwlock.
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* Owning counts as a long hold. See the comments above
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* dsl_pool_hold() for details.
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*/
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refcount_t ds_longholds;
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/* no locking; only for making guesses */
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uint64_t ds_trysnap_txg;
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/* for objset_open() */
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kmutex_t ds_opening_lock;
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uint64_t ds_reserved; /* cached refreservation */
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uint64_t ds_quota; /* cached refquota */
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kmutex_t ds_sendstream_lock;
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list_t ds_sendstreams;
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/*
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* When in the middle of a resumable receive, tracks how much
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* progress we have made.
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*/
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uint64_t ds_resume_object[TXG_SIZE];
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uint64_t ds_resume_offset[TXG_SIZE];
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uint64_t ds_resume_bytes[TXG_SIZE];
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/* Protected by our dsl_dir's dd_lock */
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list_t ds_prop_cbs;
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/*
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* For ZFEATURE_FLAG_PER_DATASET features, set if this dataset
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* uses this feature.
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*/
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uint8_t ds_feature_inuse[SPA_FEATURES];
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/*
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* Set if we need to activate the feature on this dataset this txg
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* (used only in syncing context).
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*/
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uint8_t ds_feature_activation_needed[SPA_FEATURES];
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/* Protected by ds_lock; keep at end of struct for better locality */
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char ds_snapname[ZFS_MAX_DATASET_NAME_LEN];
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} dsl_dataset_t;
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static inline dsl_dataset_phys_t *
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dsl_dataset_phys(dsl_dataset_t *ds)
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{
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return (ds->ds_dbuf->db_data);
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}
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/*
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* The max length of a temporary tag prefix is the number of hex digits
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* required to express UINT64_MAX plus one for the hyphen.
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*/
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#define MAX_TAG_PREFIX_LEN 17
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#define dsl_dataset_is_snapshot(ds) \
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(dsl_dataset_phys(ds)->ds_num_children != 0)
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#define DS_UNIQUE_IS_ACCURATE(ds) \
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((dsl_dataset_phys(ds)->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
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int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
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dsl_dataset_t **dsp);
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boolean_t dsl_dataset_try_add_ref(struct dsl_pool *dp, dsl_dataset_t *ds,
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void *tag);
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int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
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dsl_dataset_t **);
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void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
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int dsl_dataset_own(struct dsl_pool *dp, const char *name,
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void *tag, dsl_dataset_t **dsp);
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int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
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void *tag, dsl_dataset_t **dsp);
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void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
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void dsl_dataset_name(dsl_dataset_t *ds, char *name);
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boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
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int dsl_dataset_namelen(dsl_dataset_t *ds);
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boolean_t dsl_dataset_has_owner(dsl_dataset_t *ds);
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uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
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dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
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uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
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uint64_t flags, dmu_tx_t *tx);
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int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
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int dsl_dataset_promote(const char *name, char *conflsnap);
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int dsl_dataset_rename_snapshot(const char *fsname,
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const char *oldsnapname, const char *newsnapname, boolean_t recursive);
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int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
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minor_t cleanup_minor, const char *htag);
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blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
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spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds);
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boolean_t dsl_dataset_modified_since_snap(dsl_dataset_t *ds,
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dsl_dataset_t *snap);
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void dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx);
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void dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx);
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void dsl_dataset_block_born(dsl_dataset_t *ds, const blkptr_t *bp,
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dmu_tx_t *tx);
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int dsl_dataset_block_kill(dsl_dataset_t *ds, const blkptr_t *bp,
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dmu_tx_t *tx, boolean_t async);
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int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
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uint64_t *value);
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void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx);
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void dsl_dataset_stats(dsl_dataset_t *ds, nvlist_t *nv);
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void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat);
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void dsl_dataset_space(dsl_dataset_t *ds,
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uint64_t *refdbytesp, uint64_t *availbytesp,
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uint64_t *usedobjsp, uint64_t *availobjsp);
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uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds);
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int dsl_dataset_space_written(dsl_dataset_t *oldsnap, dsl_dataset_t *new,
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uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
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int dsl_dataset_space_wouldfree(dsl_dataset_t *firstsnap, dsl_dataset_t *last,
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uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
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boolean_t dsl_dataset_is_dirty(dsl_dataset_t *ds);
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int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
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int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
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uint64_t asize, uint64_t inflight, uint64_t *used,
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uint64_t *ref_rsrv);
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int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
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uint64_t quota);
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int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
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uint64_t reservation);
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boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier,
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uint64_t earlier_txg);
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void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
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void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
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boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
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int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
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dsl_dataset_t *origin_head, boolean_t force, void *owner, dmu_tx_t *tx);
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void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
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dsl_dataset_t *origin_head, dmu_tx_t *tx);
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int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
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dmu_tx_t *tx, boolean_t recv, uint64_t cnt, cred_t *cr);
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void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
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dmu_tx_t *tx);
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void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
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dmu_tx_t *tx);
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void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
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int dsl_dataset_get_snapname(dsl_dataset_t *ds);
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int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
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uint64_t *value);
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int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx,
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boolean_t adj_cnt);
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void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
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zprop_source_t source, uint64_t value, dmu_tx_t *tx);
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void dsl_dataset_zapify(dsl_dataset_t *ds, dmu_tx_t *tx);
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boolean_t dsl_dataset_is_zapified(dsl_dataset_t *ds);
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boolean_t dsl_dataset_has_resume_receive_state(dsl_dataset_t *ds);
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int dsl_dataset_rollback(const char *fsname, const char *tosnap, void *owner,
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nvlist_t *result);
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void dsl_dataset_deactivate_feature(uint64_t dsobj,
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spa_feature_t f, dmu_tx_t *tx);
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#ifdef ZFS_DEBUG
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#define dprintf_ds(ds, fmt, ...) do { \
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if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
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char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \
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dsl_dataset_name(ds, __ds_name); \
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dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \
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kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \
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} \
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_NOTE(CONSTCOND) } while (0)
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#else
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#define dprintf_ds(dd, fmt, ...)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_DATASET_H */
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