sys/cddl/contrib/opensolaris/uts/common/fs/zfs/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 2008 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 #include <sys/spa.h>
  30 #include <sys/vdev.h>
  31 #include <sys/metaslab.h>
  32 #include <sys/dmu.h>
  33 #include <sys/dsl_pool.h>
  34 #include <sys/uberblock_impl.h>
  35 #include <sys/zfs_context.h>
  36 #include <sys/avl.h>
  37 #include <sys/refcount.h>
  38 #include <sys/bplist.h>
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 typedef struct spa_error_entry {
  45         zbookmark_t     se_bookmark;
  46         char            *se_name;
  47         avl_node_t      se_avl;
  48 } spa_error_entry_t;
  49
  50 typedef struct spa_history_phys {
  51         uint64_t sh_pool_create_len;    /* ending offset of zpool create */
  52         uint64_t sh_phys_max_off;       /* physical EOF */
  53         uint64_t sh_bof;                /* logical BOF */
  54         uint64_t sh_eof;                /* logical EOF */
  55         uint64_t sh_records_lost;       /* num of records overwritten */
  56 } spa_history_phys_t;
  57
  58 struct spa_aux_vdev {
  59         uint64_t        sav_object;             /* MOS object for device list */
  60         nvlist_t        *sav_config;            /* cached device config */
  61         vdev_t          **sav_vdevs;            /* devices */
  62         int             sav_count;              /* number devices */
  63         boolean_t       sav_sync;               /* sync the device list */
  64         nvlist_t        **sav_pending;          /* pending device additions */
  65         uint_t          sav_npending;           /* # pending devices */
  66 };
  67
  68 typedef struct spa_config_lock {
  69         kmutex_t        scl_lock;
  70         kthread_t       *scl_writer;
  71         int             scl_write_wanted;
  72         kcondvar_t      scl_cv;
  73         refcount_t      scl_count;
  74 } spa_config_lock_t;
  75
  76 typedef struct spa_config_dirent {
  77         list_node_t     scd_link;
  78         char            *scd_path;
  79 } spa_config_dirent_t;
  80
  81 typedef enum spa_log_state {
  82         SPA_LOG_UNKNOWN = 0,    /* unknown log state */
  83         SPA_LOG_MISSING,        /* missing log(s) */
  84         SPA_LOG_CLEAR,          /* clear the log(s) */
  85         SPA_LOG_GOOD,           /* log(s) are good */
  86 } spa_log_state_t;
  87
  88 enum zio_taskq_type {
  89         ZIO_TASKQ_ISSUE = 0,
  90         ZIO_TASKQ_INTERRUPT,
  91         ZIO_TASKQ_TYPES
  92 };
  93
  94 struct spa {
  95         /*
  96          * Fields protected by spa_namespace_lock.
  97          */
  98         char            spa_name[MAXNAMELEN];   /* pool name */
  99         avl_node_t      spa_avl;                /* node in spa_namespace_avl */
 100         nvlist_t        *spa_config;            /* last synced config */
 101         nvlist_t        *spa_config_syncing;    /* currently syncing config */
 102         uint64_t        spa_config_txg;         /* txg of last config change */
 103         int             spa_sync_pass;          /* iterate-to-convergence */
 104         pool_state_t    spa_state;              /* pool state */
 105         int             spa_inject_ref;         /* injection references */
 106         uint8_t         spa_sync_on;            /* sync threads are running */
 107         spa_load_state_t spa_load_state;        /* current load operation */
 108         taskq_t         *spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
 109         dsl_pool_t      *spa_dsl_pool;
 110         metaslab_class_t *spa_normal_class;     /* normal data class */
 111         metaslab_class_t *spa_log_class;        /* intent log data class */
 112         uint64_t        spa_first_txg;          /* first txg after spa_open() */
 113         uint64_t        spa_final_txg;          /* txg of export/destroy */
 114         uint64_t        spa_freeze_txg;         /* freeze pool at this txg */
 115         objset_t        *spa_meta_objset;       /* copy of dp->dp_meta_objset */
 116         txg_list_t      spa_vdev_txg_list;      /* per-txg dirty vdev list */
 117         vdev_t          *spa_root_vdev;         /* top-level vdev container */
 118         uint64_t        spa_load_guid;          /* initial guid for spa_load */
 119         list_t          spa_config_dirty_list;  /* vdevs with dirty config */
 120         list_t          spa_state_dirty_list;   /* vdevs with dirty state */
 121         spa_aux_vdev_t  spa_spares;             /* hot spares */
 122         spa_aux_vdev_t  spa_l2cache;            /* L2ARC cache devices */
 123         uint64_t        spa_config_object;      /* MOS object for pool config */
 124         uint64_t        spa_syncing_txg;        /* txg currently syncing */
 125         uint64_t        spa_sync_bplist_obj;    /* object for deferred frees */
 126         bplist_t        spa_sync_bplist;        /* deferred-free bplist */
 127         uberblock_t     spa_ubsync;             /* last synced uberblock */
 128         uberblock_t     spa_uberblock;          /* current uberblock */
 129         kmutex_t        spa_scrub_lock;         /* resilver/scrub lock */
 130         uint64_t        spa_scrub_inflight;     /* in-flight scrub I/Os */
 131         uint64_t        spa_scrub_maxinflight;  /* max in-flight scrub I/Os */
 132         uint64_t        spa_scrub_errors;       /* scrub I/O error count */
 133         kcondvar_t      spa_scrub_io_cv;        /* scrub I/O completion */
 134         uint8_t         spa_scrub_active;       /* active or suspended? */
 135         uint8_t         spa_scrub_type;         /* type of scrub we're doing */
 136         uint8_t         spa_scrub_finished;     /* indicator to rotate logs */
 137         uint8_t         spa_scrub_started;      /* started since last boot */
 138         uint8_t         spa_scrub_reopen;       /* scrub doing vdev_reopen */
 139         kmutex_t        spa_async_lock;         /* protect async state */
 140         kthread_t       *spa_async_thread;      /* thread doing async task */
 141         int             spa_async_suspended;    /* async tasks suspended */
 142         kcondvar_t      spa_async_cv;           /* wait for thread_exit() */
 143         uint16_t        spa_async_tasks;        /* async task mask */
 144         kmutex_t        spa_async_root_lock;    /* protects async root count */
 145         uint64_t        spa_async_root_count;   /* number of async root zios */
 146         kcondvar_t      spa_async_root_cv;      /* notify when count == 0 */
 147         char            *spa_root;              /* alternate root directory */
 148         uint64_t        spa_ena;                /* spa-wide ereport ENA */
 149         boolean_t       spa_last_open_failed;   /* true if last open faled */
 150         kmutex_t        spa_errlog_lock;        /* error log lock */
 151         uint64_t        spa_errlog_last;        /* last error log object */
 152         uint64_t        spa_errlog_scrub;       /* scrub error log object */
 153         kmutex_t        spa_errlist_lock;       /* error list/ereport lock */
 154         avl_tree_t      spa_errlist_last;       /* last error list */
 155         avl_tree_t      spa_errlist_scrub;      /* scrub error list */
 156         uint64_t        spa_deflate;            /* should we deflate? */
 157         uint64_t        spa_history;            /* history object */
 158         kmutex_t        spa_history_lock;       /* history lock */
 159         vdev_t          *spa_pending_vdev;      /* pending vdev additions */
 160         kmutex_t        spa_props_lock;         /* property lock */
 161         uint64_t        spa_pool_props_object;  /* object for properties */
 162         uint64_t        spa_bootfs;             /* default boot filesystem */
 163         uint64_t        spa_failmode;           /* failure mode for the pool */
 164         uint64_t        spa_delegation;         /* delegation on/off */
 165         list_t          spa_config_list;        /* previous cache file(s) */
 166         zio_t           *spa_suspend_zio_root;  /* root of all suspended I/O */
 167         kmutex_t        spa_suspend_lock;       /* protects suspend_zio_root */
 168         kcondvar_t      spa_suspend_cv;         /* notification of resume */
 169         uint8_t         spa_suspended;          /* pool is suspended */
 170         boolean_t       spa_import_faulted;     /* allow faulted vdevs */
 171         boolean_t       spa_is_root;            /* pool is root */
 172         int             spa_minref;             /* num refs when first opened */
 173         spa_log_state_t spa_log_state;          /* log state */
 174         /*
 175          * spa_refcnt & spa_config_lock must be the last elements
 176          * because refcount_t changes size based on compilation options.
 177          * In order for the MDB module to function correctly, the other
 178          * fields must remain in the same location.
 179          */
 180         spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 181         refcount_t      spa_refcount;           /* number of opens */
 182 };
 183
 184 extern const char *spa_config_path;
 185
 186 #define BOOTFS_COMPRESS_VALID(compress) \
 187         ((compress) == ZIO_COMPRESS_LZJB || \
 188         ((compress) == ZIO_COMPRESS_ON && \
 189         ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
 190         (compress) == ZIO_COMPRESS_OFF)
 191
 192 #ifdef  __cplusplus
 193 }
 194 #endif
 195
 196 #endif  /* _SYS_SPA_IMPL_H */