zfs/lib/libzcommon/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 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_SPA_IMPL_H
  27 #define _SYS_SPA_IMPL_H
  28
  29 #pragma ident   "@(#)spa_impl.h 1.17    07/11/27 SMI"
  30
  31 #include <sys/spa.h>
  32 #include <sys/vdev.h>
  33 #include <sys/metaslab.h>
  34 #include <sys/dmu.h>
  35 #include <sys/dsl_pool.h>
  36 #include <sys/uberblock_impl.h>
  37 #include <sys/zfs_context.h>
  38 #include <sys/avl.h>
  39 #include <sys/refcount.h>
  40 #include <sys/bplist.h>
  41
  42 #ifdef  __cplusplus
  43 extern "C" {
  44 #endif
  45
  46 typedef struct spa_error_entry {
  47         zbookmark_t     se_bookmark;
  48         char            *se_name;
  49         avl_node_t      se_avl;
  50 } spa_error_entry_t;
  51
  52 typedef struct spa_history_phys {
  53         uint64_t sh_pool_create_len;    /* ending offset of zpool create */
  54         uint64_t sh_phys_max_off;       /* physical EOF */
  55         uint64_t sh_bof;                /* logical BOF */
  56         uint64_t sh_eof;                /* logical EOF */
  57         uint64_t sh_records_lost;       /* num of records overwritten */
  58 } spa_history_phys_t;
  59
  60 struct spa_aux_vdev {
  61         uint64_t        sav_object;             /* MOS object for device list */
  62         nvlist_t        *sav_config;            /* cached device config */
  63         vdev_t          **sav_vdevs;            /* devices */
  64         int             sav_count;              /* number devices */
  65         boolean_t       sav_sync;               /* sync the device list */
  66         nvlist_t        **sav_pending;          /* pending device additions */
  67         uint_t          sav_npending;           /* # pending devices */
  68 };
  69
  70 typedef struct spa_config_lock {
  71         kmutex_t        scl_lock;
  72         kthread_t       *scl_writer;
  73         uint16_t        scl_write_wanted;
  74         kcondvar_t      scl_cv;
  75         refcount_t      scl_count;
  76 } spa_config_lock_t;
  77
  78 struct spa {
  79         /*
  80          * Fields protected by spa_namespace_lock.
  81          */
  82         char            *spa_name;              /* pool name */
  83         avl_node_t      spa_avl;                /* node in spa_namespace_avl */
  84         nvlist_t        *spa_config;            /* last synced config */
  85         nvlist_t        *spa_config_syncing;    /* currently syncing config */
  86         uint64_t        spa_config_txg;         /* txg of last config change */
  87         kmutex_t        spa_config_cache_lock;  /* for spa_config RW_READER */
  88         int             spa_sync_pass;          /* iterate-to-convergence */
  89         int             spa_state;              /* pool state */
  90         int             spa_inject_ref;         /* injection references */
  91         uint8_t         spa_traverse_wanted;    /* traverse lock wanted */
  92         uint8_t         spa_sync_on;            /* sync threads are running */
  93         spa_load_state_t spa_load_state;        /* current load operation */
  94         taskq_t         *spa_zio_issue_taskq[ZIO_TYPES];
  95         taskq_t         *spa_zio_intr_taskq[ZIO_TYPES];
  96         dsl_pool_t      *spa_dsl_pool;
  97         metaslab_class_t *spa_normal_class;     /* normal data class */
  98         metaslab_class_t *spa_log_class;        /* intent log data class */
  99         uint64_t        spa_first_txg;          /* first txg after spa_open() */
 100         uint64_t        spa_final_txg;          /* txg of export/destroy */
 101         uint64_t        spa_freeze_txg;         /* freeze pool at this txg */
 102         objset_t        *spa_meta_objset;       /* copy of dp->dp_meta_objset */
 103         txg_list_t      spa_vdev_txg_list;      /* per-txg dirty vdev list */
 104         vdev_t          *spa_root_vdev;         /* top-level vdev container */
 105         uint64_t        spa_load_guid;          /* initial guid for spa_load */
 106         list_t          spa_dirty_list;         /* vdevs with dirty labels */
 107         spa_aux_vdev_t  spa_spares;             /* hot spares */
 108         spa_aux_vdev_t  spa_l2cache;            /* L2ARC cache devices */
 109         uint64_t        spa_config_object;      /* MOS object for pool config */
 110         uint64_t        spa_syncing_txg;        /* txg currently syncing */
 111         uint64_t        spa_sync_bplist_obj;    /* object for deferred frees */
 112         bplist_t        spa_sync_bplist;        /* deferred-free bplist */
 113         krwlock_t       spa_traverse_lock;      /* traverse vs. spa_sync() */
 114         uberblock_t     spa_ubsync;             /* last synced uberblock */
 115         uberblock_t     spa_uberblock;          /* current uberblock */
 116         kmutex_t        spa_scrub_lock;         /* resilver/scrub lock */
 117         kthread_t       *spa_scrub_thread;      /* scrub/resilver thread */
 118         traverse_handle_t *spa_scrub_th;        /* scrub traverse handle */
 119         uint64_t        spa_scrub_restart_txg;  /* need to restart */
 120         uint64_t        spa_scrub_mintxg;       /* min txg we'll scrub */
 121         uint64_t        spa_scrub_maxtxg;       /* max txg we'll scrub */
 122         uint64_t        spa_scrub_inflight;     /* in-flight scrub I/Os */
 123         uint64_t        spa_scrub_maxinflight;  /* max in-flight scrub I/Os */
 124         uint64_t        spa_scrub_errors;       /* scrub I/O error count */
 125         int             spa_scrub_suspended;    /* tell scrubber to suspend */
 126         kcondvar_t      spa_scrub_cv;           /* scrub thread state change */
 127         kcondvar_t      spa_scrub_io_cv;        /* scrub I/O completion */
 128         uint8_t         spa_scrub_stop;         /* tell scrubber to stop */
 129         uint8_t         spa_scrub_active;       /* active or suspended? */
 130         uint8_t         spa_scrub_type;         /* type of scrub we're doing */
 131         uint8_t         spa_scrub_finished;     /* indicator to rotate logs */
 132         kmutex_t        spa_async_lock;         /* protect async state */
 133         kthread_t       *spa_async_thread;      /* thread doing async task */
 134         int             spa_async_suspended;    /* async tasks suspended */
 135         kcondvar_t      spa_async_cv;           /* wait for thread_exit() */
 136         uint16_t        spa_async_tasks;        /* async task mask */
 137         char            *spa_root;              /* alternate root directory */
 138         kmutex_t        spa_uberblock_lock;     /* vdev_uberblock_load_done() */
 139         uint64_t        spa_ena;                /* spa-wide ereport ENA */
 140         boolean_t       spa_last_open_failed;   /* true if last open faled */
 141         kmutex_t        spa_errlog_lock;        /* error log lock */
 142         uint64_t        spa_errlog_last;        /* last error log object */
 143         uint64_t        spa_errlog_scrub;       /* scrub error log object */
 144         kmutex_t        spa_errlist_lock;       /* error list/ereport lock */
 145         avl_tree_t      spa_errlist_last;       /* last error list */
 146         avl_tree_t      spa_errlist_scrub;      /* scrub error list */
 147         uint64_t        spa_deflate;            /* should we deflate? */
 148         uint64_t        spa_history;            /* history object */
 149         kmutex_t        spa_history_lock;       /* history lock */
 150         vdev_t          *spa_pending_vdev;      /* pending vdev additions */
 151         kmutex_t        spa_props_lock;         /* property lock */
 152         uint64_t        spa_pool_props_object;  /* object for properties */
 153         uint64_t        spa_bootfs;             /* default boot filesystem */
 154         boolean_t       spa_delegation;         /* delegation on/off */
 155         char            *spa_config_dir;        /* cache file directory */
 156         char            *spa_config_file;       /* cache file name */
 157         list_t          spa_zio_list;           /* zio error list */
 158         kcondvar_t      spa_zio_cv;             /* resume I/O pipeline */
 159         kmutex_t        spa_zio_lock;           /* zio error lock */
 160         uint8_t         spa_failmode;           /* failure mode for the pool */
 161         /*
 162          * spa_refcnt & spa_config_lock must be the last elements
 163          * because refcount_t changes size based on compilation options.
 164          * In order for the MDB module to function correctly, the other
 165          * fields must remain in the same location.
 166          */
 167         spa_config_lock_t spa_config_lock;      /* configuration changes */
 168         refcount_t      spa_refcount;           /* number of opens */
 169 };
 170
 171 extern const char *spa_config_dir;
 172 extern kmutex_t spa_namespace_lock;
 173
 174 #ifdef  __cplusplus
 175 }
 176 #endif
 177
 178 #endif  /* _SYS_SPA_IMPL_H */