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  */
  24
  25 #ifndef _SYS_DSL_POOL_H
  26 #define _SYS_DSL_POOL_H
  27
  28 #include <sys/spa.h>
  29 #include <sys/txg.h>
  30 #include <sys/txg_impl.h>
  31 #include <sys/zfs_context.h>
  32 #include <sys/zio.h>
  33 #include <sys/dnode.h>
  34 #include <sys/ddt.h>
  35 #include <sys/arc.h>
  36 #include <sys/bpobj.h>
  37
  38 #ifdef  __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 struct objset;
  43 struct dsl_dir;
  44 struct dsl_dataset;
  45 struct dsl_pool;
  46 struct dmu_tx;
  47 struct dsl_scan;
  48
  49 /* These macros are for indexing into the zfs_all_blkstats_t. */
  50 #define DMU_OT_DEFERRED DMU_OT_NONE
  51 #define DMU_OT_TOTAL    DMU_OT_NUMTYPES
  52
  53 typedef struct zfs_blkstat {
  54         uint64_t        zb_count;
  55         uint64_t        zb_asize;
  56         uint64_t        zb_lsize;
  57         uint64_t        zb_psize;
  58         uint64_t        zb_gangs;
  59         uint64_t        zb_ditto_2_of_2_samevdev;
  60         uint64_t        zb_ditto_2_of_3_samevdev;
  61         uint64_t        zb_ditto_3_of_3_samevdev;
  62 } zfs_blkstat_t;
  63
  64 typedef struct zfs_all_blkstats {
  65         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  66 } zfs_all_blkstats_t;
  67
  68 typedef struct txg_history {
  69         kstat_txg_t     th_kstat;
  70         vdev_stat_t     th_vs1;
  71         vdev_stat_t     th_vs2;
  72         kmutex_t        th_lock;
  73         list_node_t     th_link;
  74 } txg_history_t;
  75
  76 typedef struct dsl_pool {
  77         /* Immutable */
  78         spa_t *dp_spa;
  79         struct objset *dp_meta_objset;
  80         struct dsl_dir *dp_root_dir;
  81         struct dsl_dir *dp_mos_dir;
  82         struct dsl_dir *dp_free_dir;
  83         struct dsl_dataset *dp_origin_snap;
  84         uint64_t dp_root_dir_obj;
  85         struct taskq *dp_iput_taskq;
  86         kstat_t *dp_txg_kstat;
  87
  88         /* No lock needed - sync context only */
  89         blkptr_t dp_meta_rootbp;
  90         list_t dp_synced_datasets;
  91         hrtime_t dp_read_overhead;
  92         uint64_t dp_throughput; /* bytes per millisec */
  93         uint64_t dp_write_limit;
  94         uint64_t dp_tmp_userrefs_obj;
  95         bpobj_t dp_free_bpobj;
  96
  97         struct dsl_scan *dp_scan;
  98
  99         /* Uses dp_lock */
 100         kmutex_t dp_lock;
 101         uint64_t dp_space_towrite[TXG_SIZE];
 102         uint64_t dp_tempreserved[TXG_SIZE];
 103         uint64_t dp_txg_history_size;
 104         list_t dp_txg_history;
 105
 106
 107         /* Has its own locking */
 108         tx_state_t dp_tx;
 109         txg_list_t dp_dirty_datasets;
 110         txg_list_t dp_dirty_dirs;
 111         txg_list_t dp_sync_tasks;
 112
 113         /*
 114          * Protects administrative changes (properties, namespace)
 115          * It is only held for write in syncing context.  Therefore
 116          * syncing context does not need to ever have it for read, since
 117          * nobody else could possibly have it for write.
 118          */
 119         krwlock_t dp_config_rwlock;
 120
 121         zfs_all_blkstats_t *dp_blkstats;
 122 } dsl_pool_t;
 123
 124 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 125 void dsl_pool_close(dsl_pool_t *dp);
 126 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
 127 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
 128 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
 129 int dsl_pool_sync_context(dsl_pool_t *dp);
 130 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
 131 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
 132 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
 133 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 134 void dsl_pool_memory_pressure(dsl_pool_t *dp);
 135 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 136 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
 137 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
 138     const blkptr_t *bpp);
 139 int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,
 140     arc_done_func_t *done, void *private, int priority, int zio_flags,
 141     uint32_t *arc_flags, const zbookmark_t *zb);
 142 int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,
 143     arc_done_func_t *done, void *private, int priority, int zio_flags,
 144     uint32_t *arc_flags, const zbookmark_t *zb);
 145 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 146 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 147 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 148
 149 taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
 150
 151 extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
 152     const char *tag, uint64_t *now, dmu_tx_t *tx);
 153 extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
 154     const char *tag, dmu_tx_t *tx);
 155 extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
 156 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
 157
 158 txg_history_t *dsl_pool_txg_history_add(dsl_pool_t *dp, uint64_t txg);
 159 txg_history_t *dsl_pool_txg_history_get(dsl_pool_t *dp, uint64_t txg);
 160 void dsl_pool_txg_history_put(txg_history_t *th);
 161
 162 #ifdef  __cplusplus
 163 }
 164 #endif
 165
 166 #endif /* _SYS_DSL_POOL_H */