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) 2013, 2017 by Delphix. All rights reserved.
  24  * Copyright 2016 Nexenta Systems, Inc.  All rights reserved.
  25  */
  26
  27 #ifndef _SYS_DSL_POOL_H
  28 #define _SYS_DSL_POOL_H
  29
  30 #include <sys/spa.h>
  31 #include <sys/txg.h>
  32 #include <sys/txg_impl.h>
  33 #include <sys/zfs_context.h>
  34 #include <sys/zio.h>
  35 #include <sys/dnode.h>
  36 #include <sys/ddt.h>
  37 #include <sys/arc.h>
  38 #include <sys/bpobj.h>
  39 #include <sys/bptree.h>
  40 #include <sys/rrwlock.h>
  41 #include <sys/dsl_synctask.h>
  42 #include <sys/mmp.h>
  43
  44 #ifdef  __cplusplus
  45 extern "C" {
  46 #endif
  47
  48 extern int zfs_txg_synctime_ms;
  49
  50 struct objset;
  51 struct dsl_dir;
  52 struct dsl_dataset;
  53 struct dsl_pool;
  54 struct dmu_tx;
  55 struct dsl_scan;
  56 struct dsl_crypto_params;
  57
  58 extern unsigned long zfs_dirty_data_max;
  59 extern unsigned long zfs_dirty_data_max_max;
  60 extern int zfs_dirty_data_sync_percent;
  61 extern int zfs_dirty_data_max_percent;
  62 extern int zfs_dirty_data_max_max_percent;
  63 extern int zfs_delay_min_dirty_percent;
  64 extern unsigned long zfs_delay_scale;
  65
  66 /* These macros are for indexing into the zfs_all_blkstats_t. */
  67 #define DMU_OT_DEFERRED DMU_OT_NONE
  68 #define DMU_OT_OTHER    DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
  69 #define DMU_OT_TOTAL    (DMU_OT_NUMTYPES + 1)
  70
  71 typedef struct zfs_blkstat {
  72         uint64_t        zb_count;
  73         uint64_t        zb_asize;
  74         uint64_t        zb_lsize;
  75         uint64_t        zb_psize;
  76         uint64_t        zb_gangs;
  77         uint64_t        zb_ditto_2_of_2_samevdev;
  78         uint64_t        zb_ditto_2_of_3_samevdev;
  79         uint64_t        zb_ditto_3_of_3_samevdev;
  80 } zfs_blkstat_t;
  81
  82 typedef struct zfs_all_blkstats {
  83         zfs_blkstat_t   zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
  84         kmutex_t        zab_lock;
  85 } zfs_all_blkstats_t;
  86
  87
  88 typedef struct dsl_pool {
  89         /* Immutable */
  90         spa_t *dp_spa;
  91         struct objset *dp_meta_objset;
  92         struct dsl_dir *dp_root_dir;
  93         struct dsl_dir *dp_mos_dir;
  94         struct dsl_dir *dp_free_dir;
  95         struct dsl_dir *dp_leak_dir;
  96         struct dsl_dataset *dp_origin_snap;
  97         uint64_t dp_root_dir_obj;
  98         struct taskq *dp_iput_taskq;
  99         struct taskq *dp_unlinked_drain_taskq;
 100
 101         /* No lock needed - sync context only */
 102         blkptr_t dp_meta_rootbp;
 103         uint64_t dp_tmp_userrefs_obj;
 104         bpobj_t dp_free_bpobj;
 105         uint64_t dp_bptree_obj;
 106         uint64_t dp_empty_bpobj;
 107         bpobj_t dp_obsolete_bpobj;
 108
 109         struct dsl_scan *dp_scan;
 110
 111         /* Uses dp_lock */
 112         kmutex_t dp_lock;
 113         kcondvar_t dp_spaceavail_cv;
 114         uint64_t dp_dirty_pertxg[TXG_SIZE];
 115         uint64_t dp_dirty_total;
 116         uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
 117         uint64_t dp_mos_used_delta;
 118         uint64_t dp_mos_compressed_delta;
 119         uint64_t dp_mos_uncompressed_delta;
 120
 121         /*
 122          * Time of most recently scheduled (furthest in the future)
 123          * wakeup for delayed transactions.
 124          */
 125         hrtime_t dp_last_wakeup;
 126
 127         /* Has its own locking */
 128         tx_state_t dp_tx;
 129         txg_list_t dp_dirty_datasets;
 130         txg_list_t dp_dirty_zilogs;
 131         txg_list_t dp_dirty_dirs;
 132         txg_list_t dp_sync_tasks;
 133         txg_list_t dp_early_sync_tasks;
 134         taskq_t *dp_sync_taskq;
 135         taskq_t *dp_zil_clean_taskq;
 136
 137         /*
 138          * Protects administrative changes (properties, namespace)
 139          *
 140          * It is only held for write in syncing context.  Therefore
 141          * syncing context does not need to ever have it for read, since
 142          * nobody else could possibly have it for write.
 143          */
 144         rrwlock_t dp_config_rwlock;
 145
 146         zfs_all_blkstats_t *dp_blkstats;
 147 } dsl_pool_t;
 148
 149 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
 150 int dsl_pool_open(dsl_pool_t *dp);
 151 void dsl_pool_close(dsl_pool_t *dp);
 152 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops,
 153     struct dsl_crypto_params *dcp, uint64_t txg);
 154 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
 155 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
 156 int dsl_pool_sync_context(dsl_pool_t *dp);
 157 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy);
 158 uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp,
 159     zfs_space_check_t slop_policy);
 160 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
 161 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
 162 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
 163 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
 164     const blkptr_t *bpp);
 165 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
 166 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 167 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
 168 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
 169     int64_t used, int64_t comp, int64_t uncomp);
 170 void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp,
 171     int64_t used, int64_t comp, int64_t uncomp);
 172 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
 173 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
 174 void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
 175 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
 176 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
 177 boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
 178
 179 taskq_t *dsl_pool_iput_taskq(dsl_pool_t *dp);
 180 taskq_t *dsl_pool_unlinked_drain_taskq(dsl_pool_t *dp);
 181
 182 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
 183     const char *tag, uint64_t now, dmu_tx_t *tx);
 184 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
 185     const char *tag, dmu_tx_t *tx);
 186 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
 187 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
 188 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
 189 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
 190
 191 void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
 192 void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
 193
 194 #ifdef  __cplusplus
 195 }
 196 #endif
 197
 198 #endif /* _SYS_DSL_POOL_H */