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