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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2012 by Delphix. All rights reserved.
  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 #include <sys/ddt.h>
  36 #include <sys/arc.h>
  37 #include <sys/bpobj.h>
  38 #include <sys/bptree.h>
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 extern int zfs_txg_synctime_ms;
  45
  46 struct objset;
  47 struct dsl_dir;
  48 struct dsl_dataset;
  49 struct dsl_pool;
  50 struct dmu_tx;
  51 struct dsl_scan;
  52
  53 /* These macros are for indexing into the zfs_all_blkstats_t. */
  54 #define DMU_OT_DEFERRED DMU_OT_NONE
  55 #define DMU_OT_OTHER    DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
  56 #define DMU_OT_TOTAL    (DMU_OT_NUMTYPES + 1)
  57
  58 typedef struct zfs_blkstat {
  59         uint64_t        zb_count;
  60         uint64_t        zb_asize;
  61         uint64_t        zb_lsize;
  62         uint64_t        zb_psize;
  63         uint64_t        zb_gangs;
  64         uint64_t        zb_ditto_2_of_2_samevdev;
  65         uint64_t        zb_ditto_2_of_3_samevdev;
  66         uint64_t        zb_ditto_3_of_3_samevdev;
  67 } zfs_blkstat_t;
  68
  69 typedef struct zfs_all_blkstats {
  70         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  71 } zfs_all_blkstats_t;
  72
  73 typedef struct txg_history {
  74         kstat_txg_t     th_kstat;
  75         vdev_stat_t     th_vs1;
  76         vdev_stat_t     th_vs2;
  77         kmutex_t        th_lock;
  78         list_node_t     th_link;
  79 } txg_history_t;
  80
  81 typedef struct dsl_pool {
  82         /* Immutable */
  83         spa_t *dp_spa;
  84         struct objset *dp_meta_objset;
  85         struct dsl_dir *dp_root_dir;
  86         struct dsl_dir *dp_mos_dir;
  87         struct dsl_dir *dp_free_dir;
  88         struct dsl_dataset *dp_origin_snap;
  89         uint64_t dp_root_dir_obj;
  90         struct taskq *dp_iput_taskq;
  91         kstat_t *dp_txg_kstat;
  92         kstat_t *dp_tx_assign_kstat;
  93
  94         /* No lock needed - sync context only */
  95         blkptr_t dp_meta_rootbp;
  96         hrtime_t dp_read_overhead;
  97         uint64_t dp_throughput; /* bytes per millisec */
  98         uint64_t dp_write_limit;
  99         uint64_t dp_tmp_userrefs_obj;
 100         bpobj_t dp_free_bpobj;
 101         uint64_t dp_bptree_obj;
 102         uint64_t dp_empty_bpobj;
 103
 104         struct dsl_scan *dp_scan;
 105
 106         /* Uses dp_lock */
 107         kmutex_t dp_lock;
 108         uint64_t dp_space_towrite[TXG_SIZE];
 109         uint64_t dp_tempreserved[TXG_SIZE];
 110         uint64_t dp_mos_used_delta;
 111         uint64_t dp_mos_compressed_delta;
 112         uint64_t dp_mos_uncompressed_delta;
 113         uint64_t dp_txg_history_size;
 114         list_t dp_txg_history;
 115         uint64_t dp_tx_assign_size;
 116         kstat_named_t *dp_tx_assign_buckets;
 117
 118
 119         /* Has its own locking */
 120         tx_state_t dp_tx;
 121         txg_list_t dp_dirty_datasets;
 122         txg_list_t dp_dirty_zilogs;
 123         txg_list_t dp_dirty_dirs;
 124         txg_list_t dp_sync_tasks;
 125
 126         /*
 127          * Protects administrative changes (properties, namespace)
 128          * It is only held for write in syncing context.  Therefore
 129          * syncing context does not need to ever have it for read, since
 130          * nobody else could possibly have it for write.
 131          */
 132         krwlock_t dp_config_rwlock;
 133
 134         zfs_all_blkstats_t *dp_blkstats;
 135 } dsl_pool_t;
 136
 137 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 138 int dsl_pool_open(dsl_pool_t *dp);
 139 void dsl_pool_close(dsl_pool_t *dp);
 140 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
 141 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
 142 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
 143 int dsl_pool_sync_context(dsl_pool_t *dp);
 144 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
 145 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
 146 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
 147 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 148 void dsl_pool_memory_pressure(dsl_pool_t *dp);
 149 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 150 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
 151 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
 152     const blkptr_t *bpp);
 153 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 154 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 155 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 156 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
 157     int64_t used, int64_t comp, int64_t uncomp);
 158
 159 taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
 160
 161 extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
 162     const char *tag, uint64_t *now, dmu_tx_t *tx);
 163 extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
 164     const char *tag, dmu_tx_t *tx);
 165 extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
 166 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
 167
 168 void dsl_pool_tx_assign_add_usecs(dsl_pool_t *dp, uint64_t usecs);
 169
 170 txg_history_t *dsl_pool_txg_history_add(dsl_pool_t *dp, uint64_t txg);
 171 txg_history_t *dsl_pool_txg_history_get(dsl_pool_t *dp, uint64_t txg);
 172 void dsl_pool_txg_history_put(txg_history_t *th);
 173
 174 #ifdef  __cplusplus
 175 }
 176 #endif
 177
 178 #endif /* _SYS_DSL_POOL_H */