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b525630342
This change incorporates three major pieces: The first change is a keystore that manages wrapping and encryption keys for encrypted datasets. These commands mostly involve manipulating the new DSL Crypto Key ZAP Objects that live in the MOS. Each encrypted dataset has its own DSL Crypto Key that is protected with a user's key. This level of indirection allows users to change their keys without re-encrypting their entire datasets. The change implements the new subcommands "zfs load-key", "zfs unload-key" and "zfs change-key" which allow the user to manage their encryption keys and settings. In addition, several new flags and properties have been added to allow dataset creation and to make mounting and unmounting more convenient. The second piece of this patch provides the ability to encrypt, decyrpt, and authenticate protected datasets. Each object set maintains a Merkel tree of Message Authentication Codes that protect the lower layers, similarly to how checksums are maintained. This part impacts the zio layer, which handles the actual encryption and generation of MACs, as well as the ARC and DMU, which need to be able to handle encrypted buffers and protected data. The last addition is the ability to do raw, encrypted sends and receives. The idea here is to send raw encrypted and compressed data and receive it exactly as is on a backup system. This means that the dataset on the receiving system is protected using the same user key that is in use on the sending side. By doing so, datasets can be efficiently backed up to an untrusted system without fear of data being compromised. Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Jorgen Lundman <lundman@lundman.net> Signed-off-by: Tom Caputi <tcaputi@datto.com> Closes #494 Closes #5769
186 lines
5.7 KiB
C
186 lines
5.7 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) 2013, 2017 by Delphix. All rights reserved.
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* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
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*/
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#ifndef _SYS_DSL_POOL_H
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#define _SYS_DSL_POOL_H
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#include <sys/spa.h>
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#include <sys/txg.h>
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#include <sys/txg_impl.h>
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#include <sys/zfs_context.h>
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#include <sys/zio.h>
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#include <sys/dnode.h>
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#include <sys/ddt.h>
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#include <sys/arc.h>
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#include <sys/bpobj.h>
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#include <sys/bptree.h>
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#include <sys/rrwlock.h>
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#include <sys/mmp.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int zfs_txg_synctime_ms;
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struct objset;
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struct dsl_dir;
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struct dsl_dataset;
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struct dsl_pool;
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struct dmu_tx;
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struct dsl_scan;
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struct dsl_crypto_params;
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extern unsigned long zfs_dirty_data_max;
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extern unsigned long zfs_dirty_data_max_max;
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extern unsigned long zfs_dirty_data_sync;
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extern int zfs_dirty_data_max_percent;
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extern int zfs_dirty_data_max_max_percent;
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extern int zfs_delay_min_dirty_percent;
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extern unsigned long zfs_delay_scale;
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/* These macros are for indexing into the zfs_all_blkstats_t. */
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#define DMU_OT_DEFERRED DMU_OT_NONE
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#define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
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#define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
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typedef struct zfs_blkstat {
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uint64_t zb_count;
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uint64_t zb_asize;
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uint64_t zb_lsize;
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uint64_t zb_psize;
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uint64_t zb_gangs;
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uint64_t zb_ditto_2_of_2_samevdev;
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uint64_t zb_ditto_2_of_3_samevdev;
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uint64_t zb_ditto_3_of_3_samevdev;
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} zfs_blkstat_t;
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typedef struct zfs_all_blkstats {
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zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
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} zfs_all_blkstats_t;
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typedef struct dsl_pool {
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/* Immutable */
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spa_t *dp_spa;
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struct objset *dp_meta_objset;
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struct dsl_dir *dp_root_dir;
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struct dsl_dir *dp_mos_dir;
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struct dsl_dir *dp_free_dir;
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struct dsl_dir *dp_leak_dir;
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struct dsl_dataset *dp_origin_snap;
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uint64_t dp_root_dir_obj;
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struct taskq *dp_iput_taskq;
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/* No lock needed - sync context only */
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blkptr_t dp_meta_rootbp;
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uint64_t dp_tmp_userrefs_obj;
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bpobj_t dp_free_bpobj;
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uint64_t dp_bptree_obj;
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uint64_t dp_empty_bpobj;
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struct dsl_scan *dp_scan;
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/* Uses dp_lock */
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kmutex_t dp_lock;
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kcondvar_t dp_spaceavail_cv;
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uint64_t dp_dirty_pertxg[TXG_SIZE];
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uint64_t dp_dirty_total;
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uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
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uint64_t dp_mos_used_delta;
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uint64_t dp_mos_compressed_delta;
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uint64_t dp_mos_uncompressed_delta;
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/*
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* Time of most recently scheduled (furthest in the future)
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* wakeup for delayed transactions.
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*/
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hrtime_t dp_last_wakeup;
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/* Has its own locking */
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tx_state_t dp_tx;
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txg_list_t dp_dirty_datasets;
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txg_list_t dp_dirty_zilogs;
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txg_list_t dp_dirty_dirs;
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txg_list_t dp_sync_tasks;
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taskq_t *dp_sync_taskq;
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/*
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* Protects administrative changes (properties, namespace)
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*
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* It is only held for write in syncing context. Therefore
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* syncing context does not need to ever have it for read, since
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* nobody else could possibly have it for write.
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*/
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rrwlock_t dp_config_rwlock;
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zfs_all_blkstats_t *dp_blkstats;
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} dsl_pool_t;
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int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
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int dsl_pool_open(dsl_pool_t *dp);
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void dsl_pool_close(dsl_pool_t *dp);
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dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops,
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struct dsl_crypto_params *dcp, uint64_t txg);
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void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
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void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
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int dsl_pool_sync_context(dsl_pool_t *dp);
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uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
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uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
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void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
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void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
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void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
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void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
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const blkptr_t *bpp);
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void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
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void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
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int64_t used, int64_t comp, int64_t uncomp);
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boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
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void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
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void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
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boolean_t dsl_pool_config_held(dsl_pool_t *dp);
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boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
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taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
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int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, uint64_t now, dmu_tx_t *tx);
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int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
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const char *tag, dmu_tx_t *tx);
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void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
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int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
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int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
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void dsl_pool_rele(dsl_pool_t *dp, void *tag);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_POOL_H */
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