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 #include <sys/rrwlock.h>
  40 
  41 #ifdef  __cplusplus
  42 extern "C" {
  43 #endif
  44 
  45 struct objset;
  46 struct dsl_dir;
  47 struct dsl_dataset;
  48 struct dsl_pool;
  49 struct dmu_tx;
  50 struct dsl_scan;
  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_OTHER    DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
  55 #define DMU_OT_TOTAL    (DMU_OT_NUMTYPES + 1)
  56 
  57 typedef struct zfs_blkstat {
  58         uint64_t        zb_count;
  59         uint64_t        zb_asize;
  60         uint64_t        zb_lsize;
  61         uint64_t        zb_psize;
  62         uint64_t        zb_gangs;
  63         uint64_t        zb_ditto_2_of_2_samevdev;
  64         uint64_t        zb_ditto_2_of_3_samevdev;
  65         uint64_t        zb_ditto_3_of_3_samevdev;
  66 } zfs_blkstat_t;
  67 
  68 typedef struct zfs_all_blkstats {
  69         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  70 } zfs_all_blkstats_t;
  71 
  72 
  73 typedef struct dsl_pool {
  74         /* Immutable */
  75         spa_t *dp_spa;
  76         struct objset *dp_meta_objset;
  77         struct dsl_dir *dp_root_dir;
  78         struct dsl_dir *dp_mos_dir;
  79         struct dsl_dir *dp_free_dir;
  80         struct dsl_dataset *dp_origin_snap;
  81         uint64_t dp_root_dir_obj;
  82         struct taskq *dp_vnrele_taskq;
  83 
  84         /* No lock needed - sync context only */
  85         blkptr_t dp_meta_rootbp;
  86         hrtime_t dp_read_overhead;
  87         uint64_t dp_throughput; /* bytes per millisec */
  88         uint64_t dp_write_limit;
  89         uint64_t dp_tmp_userrefs_obj;
  90         bpobj_t dp_free_bpobj;
  91         uint64_t dp_bptree_obj;
  92         uint64_t dp_empty_bpobj;
  93 
  94         struct dsl_scan *dp_scan;
  95 
  96         /* Uses dp_lock */
  97         kmutex_t dp_lock;
  98         uint64_t dp_space_towrite[TXG_SIZE];
  99         uint64_t dp_tempreserved[TXG_SIZE];
 100         uint64_t dp_mos_used_delta;
 101         uint64_t dp_mos_compressed_delta;
 102         uint64_t dp_mos_uncompressed_delta;
 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_zilogs;
 108         txg_list_t dp_dirty_dirs;
 109         txg_list_t dp_sync_tasks;
 110 
 111         /*
 112          * Protects administrative changes (properties, namespace)
 113          *
 114          * It is only held for write in syncing context.  Therefore
 115          * syncing context does not need to ever have it for read, since
 116          * nobody else could possibly have it for write.
 117          */
 118         rrwlock_t dp_config_rwlock;
 119 
 120         zfs_all_blkstats_t *dp_blkstats;
 121 } dsl_pool_t;
 122 
 123 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 124 int dsl_pool_open(dsl_pool_t *dp);
 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 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 140 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 141 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 142 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
 143     int64_t used, int64_t comp, int64_t uncomp);
 144 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
 145 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
 146 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
 147 
 148 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
 149 
 150 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
 151     const char *tag, uint64_t now, dmu_tx_t *tx);
 152 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
 153     const char *tag, dmu_tx_t *tx);
 154 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
 155 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
 156 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
 157 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
 158 
 159 #ifdef  __cplusplus
 160 }
 161 #endif
 162 
 163 #endif /* _SYS_DSL_POOL_H */