include/sys/spa_impl.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) 2011, 2014 by Delphix. All rights reserved.
  24  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  25  */
  26
  27 #ifndef _SYS_SPA_IMPL_H
  28 #define _SYS_SPA_IMPL_H
  29
  30 #include <sys/spa.h>
  31 #include <sys/vdev.h>
  32 #include <sys/metaslab.h>
  33 #include <sys/dmu.h>
  34 #include <sys/dsl_pool.h>
  35 #include <sys/uberblock_impl.h>
  36 #include <sys/zfs_context.h>
  37 #include <sys/avl.h>
  38 #include <sys/refcount.h>
  39 #include <sys/bplist.h>
  40 #include <sys/bpobj.h>
  41 #include <sys/zfeature.h>
  42 #include <zfeature_common.h>
  43
  44 #ifdef  __cplusplus
  45 extern "C" {
  46 #endif
  47
  48 typedef struct spa_error_entry {
  49         zbookmark_phys_t        se_bookmark;
  50         char                    *se_name;
  51         avl_node_t              se_avl;
  52 } spa_error_entry_t;
  53
  54 typedef struct spa_history_phys {
  55         uint64_t sh_pool_create_len;    /* ending offset of zpool create */
  56         uint64_t sh_phys_max_off;       /* physical EOF */
  57         uint64_t sh_bof;                /* logical BOF */
  58         uint64_t sh_eof;                /* logical EOF */
  59         uint64_t sh_records_lost;       /* num of records overwritten */
  60 } spa_history_phys_t;
  61
  62 struct spa_aux_vdev {
  63         uint64_t        sav_object;             /* MOS object for device list */
  64         nvlist_t        *sav_config;            /* cached device config */
  65         vdev_t          **sav_vdevs;            /* devices */
  66         int             sav_count;              /* number devices */
  67         boolean_t       sav_sync;               /* sync the device list */
  68         nvlist_t        **sav_pending;          /* pending device additions */
  69         uint_t          sav_npending;           /* # pending devices */
  70 };
  71
  72 typedef struct spa_config_lock {
  73         kmutex_t        scl_lock;
  74         kthread_t       *scl_writer;
  75         int             scl_write_wanted;
  76         kcondvar_t      scl_cv;
  77         refcount_t      scl_count;
  78 } spa_config_lock_t;
  79
  80 typedef struct spa_config_dirent {
  81         list_node_t     scd_link;
  82         char            *scd_path;
  83 } spa_config_dirent_t;
  84
  85 typedef enum zio_taskq_type {
  86         ZIO_TASKQ_ISSUE = 0,
  87         ZIO_TASKQ_ISSUE_HIGH,
  88         ZIO_TASKQ_INTERRUPT,
  89         ZIO_TASKQ_INTERRUPT_HIGH,
  90         ZIO_TASKQ_TYPES
  91 } zio_taskq_type_t;
  92
  93 /*
  94  * State machine for the zpool-poolname process.  The states transitions
  95  * are done as follows:
  96  *
  97  *      From               To                   Routine
  98  *      PROC_NONE       -> PROC_CREATED         spa_activate()
  99  *      PROC_CREATED    -> PROC_ACTIVE          spa_thread()
 100  *      PROC_ACTIVE     -> PROC_DEACTIVATE      spa_deactivate()
 101  *      PROC_DEACTIVATE -> PROC_GONE            spa_thread()
 102  *      PROC_GONE       -> PROC_NONE            spa_deactivate()
 103  */
 104 typedef enum spa_proc_state {
 105         SPA_PROC_NONE,          /* spa_proc = &p0, no process created */
 106         SPA_PROC_CREATED,       /* spa_activate() has proc, is waiting */
 107         SPA_PROC_ACTIVE,        /* taskqs created, spa_proc set */
 108         SPA_PROC_DEACTIVATE,    /* spa_deactivate() requests process exit */
 109         SPA_PROC_GONE           /* spa_thread() is exiting, spa_proc = &p0 */
 110 } spa_proc_state_t;
 111
 112 typedef struct spa_taskqs {
 113         uint_t stqs_count;
 114         taskq_t **stqs_taskq;
 115 } spa_taskqs_t;
 116
 117 struct spa {
 118         /*
 119          * Fields protected by spa_namespace_lock.
 120          */
 121         char            spa_name[MAXNAMELEN];   /* pool name */
 122         char            *spa_comment;           /* comment */
 123         avl_node_t      spa_avl;                /* node in spa_namespace_avl */
 124         nvlist_t        *spa_config;            /* last synced config */
 125         nvlist_t        *spa_config_syncing;    /* currently syncing config */
 126         nvlist_t        *spa_config_splitting;  /* config for splitting */
 127         nvlist_t        *spa_load_info;         /* info and errors from load */
 128         uint64_t        spa_config_txg;         /* txg of last config change */
 129         int             spa_sync_pass;          /* iterate-to-convergence */
 130         pool_state_t    spa_state;              /* pool state */
 131         int             spa_inject_ref;         /* injection references */
 132         uint8_t         spa_sync_on;            /* sync threads are running */
 133         spa_load_state_t spa_load_state;        /* current load operation */
 134         uint64_t        spa_import_flags;       /* import specific flags */
 135         spa_taskqs_t    spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
 136         dsl_pool_t      *spa_dsl_pool;
 137         boolean_t       spa_is_initializing;    /* true while opening pool */
 138         metaslab_class_t *spa_normal_class;     /* normal data class */
 139         metaslab_class_t *spa_log_class;        /* intent log data class */
 140         uint64_t        spa_first_txg;          /* first txg after spa_open() */
 141         uint64_t        spa_final_txg;          /* txg of export/destroy */
 142         uint64_t        spa_freeze_txg;         /* freeze pool at this txg */
 143         uint64_t        spa_load_max_txg;       /* best initial ub_txg */
 144         uint64_t        spa_claim_max_txg;      /* highest claimed birth txg */
 145         timespec_t      spa_loaded_ts;          /* 1st successful open time */
 146         objset_t        *spa_meta_objset;       /* copy of dp->dp_meta_objset */
 147         txg_list_t      spa_vdev_txg_list;      /* per-txg dirty vdev list */
 148         vdev_t          *spa_root_vdev;         /* top-level vdev container */
 149         uint64_t        spa_config_guid;        /* config pool guid */
 150         uint64_t        spa_load_guid;          /* spa_load initialized guid */
 151         uint64_t        spa_last_synced_guid;   /* last synced guid */
 152         list_t          spa_config_dirty_list;  /* vdevs with dirty config */
 153         list_t          spa_state_dirty_list;   /* vdevs with dirty state */
 154         spa_aux_vdev_t  spa_spares;             /* hot spares */
 155         spa_aux_vdev_t  spa_l2cache;            /* L2ARC cache devices */
 156         nvlist_t        *spa_label_features;    /* Features for reading MOS */
 157         uint64_t        spa_config_object;      /* MOS object for pool config */
 158         uint64_t        spa_config_generation;  /* config generation number */
 159         uint64_t        spa_syncing_txg;        /* txg currently syncing */
 160         bpobj_t         spa_deferred_bpobj;     /* deferred-free bplist */
 161         bplist_t        spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
 162         uberblock_t     spa_ubsync;             /* last synced uberblock */
 163         uberblock_t     spa_uberblock;          /* current uberblock */
 164         boolean_t       spa_extreme_rewind;     /* rewind past deferred frees */
 165         uint64_t        spa_last_io;            /* lbolt of last non-scan I/O */
 166         kmutex_t        spa_scrub_lock;         /* resilver/scrub lock */
 167         uint64_t        spa_scrub_inflight;     /* in-flight scrub I/Os */
 168         kcondvar_t      spa_scrub_io_cv;        /* scrub I/O completion */
 169         uint8_t         spa_scrub_active;       /* active or suspended? */
 170         uint8_t         spa_scrub_type;         /* type of scrub we're doing */
 171         uint8_t         spa_scrub_finished;     /* indicator to rotate logs */
 172         uint8_t         spa_scrub_started;      /* started since last boot */
 173         uint8_t         spa_scrub_reopen;       /* scrub doing vdev_reopen */
 174         uint64_t        spa_scan_pass_start;    /* start time per pass/reboot */
 175         uint64_t        spa_scan_pass_exam;     /* examined bytes per pass */
 176         kmutex_t        spa_async_lock;         /* protect async state */
 177         kthread_t       *spa_async_thread;      /* thread doing async task */
 178         int             spa_async_suspended;    /* async tasks suspended */
 179         kcondvar_t      spa_async_cv;           /* wait for thread_exit() */
 180         uint16_t        spa_async_tasks;        /* async task mask */
 181         char            *spa_root;              /* alternate root directory */
 182         uint64_t        spa_ena;                /* spa-wide ereport ENA */
 183         int             spa_last_open_failed;   /* error if last open failed */
 184         uint64_t        spa_last_ubsync_txg;    /* "best" uberblock txg */
 185         uint64_t        spa_last_ubsync_txg_ts; /* timestamp from that ub */
 186         uint64_t        spa_load_txg;           /* ub txg that loaded */
 187         uint64_t        spa_load_txg_ts;        /* timestamp from that ub */
 188         uint64_t        spa_load_meta_errors;   /* verify metadata err count */
 189         uint64_t        spa_load_data_errors;   /* verify data err count */
 190         uint64_t        spa_verify_min_txg;     /* start txg of verify scrub */
 191         kmutex_t        spa_errlog_lock;        /* error log lock */
 192         uint64_t        spa_errlog_last;        /* last error log object */
 193         uint64_t        spa_errlog_scrub;       /* scrub error log object */
 194         kmutex_t        spa_errlist_lock;       /* error list/ereport lock */
 195         avl_tree_t      spa_errlist_last;       /* last error list */
 196         avl_tree_t      spa_errlist_scrub;      /* scrub error list */
 197         uint64_t        spa_deflate;            /* should we deflate? */
 198         uint64_t        spa_history;            /* history object */
 199         kmutex_t        spa_history_lock;       /* history lock */
 200         vdev_t          *spa_pending_vdev;      /* pending vdev additions */
 201         kmutex_t        spa_props_lock;         /* property lock */
 202         uint64_t        spa_pool_props_object;  /* object for properties */
 203         uint64_t        spa_bootfs;             /* default boot filesystem */
 204         uint64_t        spa_failmode;           /* failure mode for the pool */
 205         uint64_t        spa_delegation;         /* delegation on/off */
 206         list_t          spa_config_list;        /* previous cache file(s) */
 207         /* per-CPU array of root of async I/O: */
 208         zio_t           **spa_async_zio_root;
 209         zio_t           *spa_suspend_zio_root;  /* root of all suspended I/O */
 210         kmutex_t        spa_suspend_lock;       /* protects suspend_zio_root */
 211         kcondvar_t      spa_suspend_cv;         /* notification of resume */
 212         uint8_t         spa_suspended;          /* pool is suspended */
 213         uint8_t         spa_claiming;           /* pool is doing zil_claim() */
 214         boolean_t       spa_debug;              /* debug enabled? */
 215         boolean_t       spa_is_root;            /* pool is root */
 216         int             spa_minref;             /* num refs when first opened */
 217         int             spa_mode;               /* FREAD | FWRITE */
 218         spa_log_state_t spa_log_state;          /* log state */
 219         uint64_t        spa_autoexpand;         /* lun expansion on/off */
 220         ddt_t           *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
 221         uint64_t        spa_ddt_stat_object;    /* DDT statistics */
 222         uint64_t        spa_dedup_ditto;        /* dedup ditto threshold */
 223         uint64_t        spa_dedup_checksum;     /* default dedup checksum */
 224         uint64_t        spa_dspace;             /* dspace in normal class */
 225         kmutex_t        spa_vdev_top_lock;      /* dueling offline/remove */
 226         kmutex_t        spa_proc_lock;          /* protects spa_proc* */
 227         kcondvar_t      spa_proc_cv;            /* spa_proc_state transitions */
 228         spa_proc_state_t spa_proc_state;        /* see definition */
 229         proc_t          *spa_proc;              /* "zpool-poolname" process */
 230         uint64_t        spa_did;                /* if procp != p0, did of t1 */
 231         boolean_t       spa_autoreplace;        /* autoreplace set in open */
 232         int             spa_vdev_locks;         /* locks grabbed */
 233         uint64_t        spa_creation_version;   /* version at pool creation */
 234         uint64_t        spa_prev_software_version; /* See ub_software_version */
 235         uint64_t        spa_feat_for_write_obj; /* required to write to pool */
 236         uint64_t        spa_feat_for_read_obj;  /* required to read from pool */
 237         uint64_t        spa_feat_desc_obj;      /* Feature descriptions */
 238         uint64_t        spa_feat_enabled_txg_obj; /* Feature enabled txg */
 239         kmutex_t        spa_feat_stats_lock;    /* protects spa_feat_stats */
 240         nvlist_t        *spa_feat_stats;        /* Cache of enabled features */
 241         /* cache feature refcounts */
 242         uint64_t        spa_feat_refcount_cache[SPA_FEATURES];
 243         taskqid_t       spa_deadman_tqid;       /* Task id */
 244         uint64_t        spa_deadman_calls;      /* number of deadman calls */
 245         hrtime_t        spa_sync_starttime;     /* starting time of spa_sync */
 246         uint64_t        spa_deadman_synctime;   /* deadman expiration timer */
 247         uint64_t        spa_errata;             /* errata issues detected */
 248         spa_stats_t     spa_stats;              /* assorted spa statistics */
 249
 250         /*
 251          * spa_refcount & spa_config_lock must be the last elements
 252          * because refcount_t changes size based on compilation options.
 253          * In order for the MDB module to function correctly, the other
 254          * fields must remain in the same location.
 255          */
 256         spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 257         refcount_t      spa_refcount;           /* number of opens */
 258 };
 259
 260 extern char *spa_config_path;
 261
 262 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
 263     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
 264 extern void spa_taskq_dispatch_sync(spa_t *, zio_type_t t, zio_taskq_type_t q,
 265     task_func_t *func, void *arg, uint_t flags);
 266
 267
 268 #ifdef  __cplusplus
 269 }
 270 #endif
 271
 272 #endif  /* _SYS_SPA_IMPL_H */