zfs/lib/libzpool/include/sys/dsl_pool.h

   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 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_DSL_POOL_H
  27 #define _SYS_DSL_POOL_H
  28
  29 #include <sys/spa.h>
  30 #include <sys/txg.h>
  31 #include <sys/txg_impl.h>
  32 #include <sys/zfs_context.h>
  33 #include <sys/zio.h>
  34 #include <sys/dnode.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 struct objset;
  41 struct dsl_dir;
  42 struct dsl_dataset;
  43 struct dsl_pool;
  44 struct dmu_tx;
  45
  46 enum scrub_func {
  47         SCRUB_FUNC_NONE,
  48         SCRUB_FUNC_CLEAN,
  49         SCRUB_FUNC_NUMFUNCS
  50 };
  51
  52 /* These macros are for indexing into the zfs_all_blkstats_t. */
  53 #define DMU_OT_DEFERRED DMU_OT_NONE
  54 #define DMU_OT_TOTAL    DMU_OT_NUMTYPES
  55
  56 typedef struct zfs_blkstat {
  57         uint64_t        zb_count;
  58         uint64_t        zb_asize;
  59         uint64_t        zb_lsize;
  60         uint64_t        zb_psize;
  61         uint64_t        zb_gangs;
  62         uint64_t        zb_ditto_2_of_2_samevdev;
  63         uint64_t        zb_ditto_2_of_3_samevdev;
  64         uint64_t        zb_ditto_3_of_3_samevdev;
  65 } zfs_blkstat_t;
  66
  67 typedef struct zfs_all_blkstats {
  68         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  69 } zfs_all_blkstats_t;
  70
  71
  72 typedef struct dsl_pool {
  73         /* Immutable */
  74         spa_t *dp_spa;
  75         struct objset *dp_meta_objset;
  76         struct dsl_dir *dp_root_dir;
  77         struct dsl_dir *dp_mos_dir;
  78         struct dsl_dataset *dp_origin_snap;
  79         uint64_t dp_root_dir_obj;
  80
  81         /* No lock needed - sync context only */
  82         blkptr_t dp_meta_rootbp;
  83         list_t dp_synced_datasets;
  84         hrtime_t dp_read_overhead;
  85         uint64_t dp_throughput;
  86         uint64_t dp_write_limit;
  87
  88         /* Uses dp_lock */
  89         kmutex_t dp_lock;
  90         uint64_t dp_space_towrite[TXG_SIZE];
  91         uint64_t dp_tempreserved[TXG_SIZE];
  92
  93         enum scrub_func dp_scrub_func;
  94         uint64_t dp_scrub_queue_obj;
  95         uint64_t dp_scrub_min_txg;
  96         uint64_t dp_scrub_max_txg;
  97         zbookmark_t dp_scrub_bookmark;
  98         boolean_t dp_scrub_pausing;
  99         boolean_t dp_scrub_isresilver;
 100         uint64_t dp_scrub_start_time;
 101         kmutex_t dp_scrub_cancel_lock; /* protects dp_scrub_restart */
 102         boolean_t dp_scrub_restart;
 103
 104         /* Has its own locking */
 105         tx_state_t dp_tx;
 106         txg_list_t dp_dirty_datasets;
 107         txg_list_t dp_dirty_dirs;
 108         txg_list_t dp_sync_tasks;
 109
 110         /*
 111          * Protects administrative changes (properties, namespace)
 112          * It is only held for write in syncing context.  Therefore
 113          * syncing context does not need to ever have it for read, since
 114          * nobody else could possibly have it for write.
 115          */
 116         krwlock_t dp_config_rwlock;
 117
 118         zfs_all_blkstats_t *dp_blkstats;
 119 } dsl_pool_t;
 120
 121 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 122 void dsl_pool_close(dsl_pool_t *dp);
 123 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
 124 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
 125 void dsl_pool_zil_clean(dsl_pool_t *dp);
 126 int dsl_pool_sync_context(dsl_pool_t *dp);
 127 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
 128 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
 129 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 130 void dsl_pool_memory_pressure(dsl_pool_t *dp);
 131 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 132 int dsl_free(zio_t *pio, dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp,
 133     zio_done_func_t *done, void *private, uint32_t arc_flags);
 134 void dsl_pool_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
 135 void dsl_pool_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
 136 void dsl_pool_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
 137     struct dmu_tx *tx);
 138 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 139 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 140
 141 int dsl_pool_scrub_cancel(dsl_pool_t *dp);
 142 int dsl_pool_scrub_clean(dsl_pool_t *dp);
 143 void dsl_pool_scrub_sync(dsl_pool_t *dp, dmu_tx_t *tx);
 144 void dsl_pool_scrub_restart(dsl_pool_t *dp);
 145
 146 #ifdef  __cplusplus
 147 }
 148 #endif
 149
 150 #endif /* _SYS_DSL_POOL_H */