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) 2013 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 extern uint64_t zfs_dirty_data_max;
  53 extern uint64_t zfs_dirty_data_max_max;
  54 extern uint64_t zfs_dirty_data_sync;
  55 extern int zfs_dirty_data_max_percent;
  56 extern int zfs_delay_min_dirty_percent;
  57 extern uint64_t zfs_delay_scale;
  58 
  59 /* These macros are for indexing into the zfs_all_blkstats_t. */
  60 #define DMU_OT_DEFERRED DMU_OT_NONE
  61 #define DMU_OT_OTHER    DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
  62 #define DMU_OT_TOTAL    (DMU_OT_NUMTYPES + 1)
  63 
  64 typedef struct zfs_blkstat {
  65         uint64_t        zb_count;
  66         uint64_t        zb_asize;
  67         uint64_t        zb_lsize;
  68         uint64_t        zb_psize;
  69         uint64_t        zb_gangs;
  70         uint64_t        zb_ditto_2_of_2_samevdev;
  71         uint64_t        zb_ditto_2_of_3_samevdev;
  72         uint64_t        zb_ditto_3_of_3_samevdev;
  73 } zfs_blkstat_t;
  74 
  75 typedef struct zfs_all_blkstats {
  76         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  77 } zfs_all_blkstats_t;
  78 
  79 
  80 typedef struct dsl_pool {
  81         /* Immutable */
  82         spa_t *dp_spa;
  83         struct objset *dp_meta_objset;
  84         struct dsl_dir *dp_root_dir;
  85         struct dsl_dir *dp_mos_dir;
  86         struct dsl_dir *dp_free_dir;
  87         struct dsl_dir *dp_leak_dir;
  88         struct dsl_dataset *dp_origin_snap;
  89         uint64_t dp_root_dir_obj;
  90         struct taskq *dp_vnrele_taskq;
  91 
  92         /* No lock needed - sync context only */
  93         blkptr_t dp_meta_rootbp;
  94         uint64_t dp_tmp_userrefs_obj;
  95         bpobj_t dp_free_bpobj;
  96         uint64_t dp_bptree_obj;
  97         uint64_t dp_empty_bpobj;
  98 
  99         struct dsl_scan *dp_scan;
 100 
 101         /* Uses dp_lock */
 102         kmutex_t dp_lock;
 103         kcondvar_t dp_spaceavail_cv;
 104         uint64_t dp_dirty_pertxg[TXG_SIZE];
 105         uint64_t dp_dirty_total;
 106         uint64_t dp_mos_used_delta;
 107         uint64_t dp_mos_compressed_delta;
 108         uint64_t dp_mos_uncompressed_delta;
 109 
 110         /*
 111          * Time of most recently scheduled (furthest in the future)
 112          * wakeup for delayed transactions.
 113          */
 114         hrtime_t dp_last_wakeup;
 115 
 116         /* Has its own locking */
 117         tx_state_t dp_tx;
 118         txg_list_t dp_dirty_datasets;
 119         txg_list_t dp_dirty_zilogs;
 120         txg_list_t dp_dirty_dirs;
 121         txg_list_t dp_sync_tasks;
 122 
 123         /*
 124          * Protects administrative changes (properties, namespace)
 125          *
 126          * It is only held for write in syncing context.  Therefore
 127          * syncing context does not need to ever have it for read, since
 128          * nobody else could possibly have it for write.
 129          */
 130         rrwlock_t dp_config_rwlock;
 131 
 132         zfs_all_blkstats_t *dp_blkstats;
 133 } dsl_pool_t;
 134 
 135 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 136 int dsl_pool_open(dsl_pool_t *dp);
 137 void dsl_pool_close(dsl_pool_t *dp);
 138 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
 139 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
 140 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
 141 int dsl_pool_sync_context(dsl_pool_t *dp);
 142 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
 143 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
 144 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 145 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
 146 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
 147 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
 148     const blkptr_t *bpp);
 149 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 150 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 151 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 152 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
 153     int64_t used, int64_t comp, int64_t uncomp);
 154 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
 155 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
 156 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
 157 boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
 158 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
 159 
 160 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
 161 
 162 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
 163     const char *tag, uint64_t now, dmu_tx_t *tx);
 164 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
 165     const char *tag, dmu_tx_t *tx);
 166 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
 167 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
 168 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
 169 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
 170 
 171 #ifdef  __cplusplus
 172 }
 173 #endif
 174 
 175 #endif /* _SYS_DSL_POOL_H */