usr/src/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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
  24  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  25  * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
  26  * Copyright 2013 Saso Kiselkov. All rights reserved.
  27  * Copyright (c) 2017 Datto Inc.
  28  */
  29
  30 #ifndef _SYS_SPA_IMPL_H
  31 #define _SYS_SPA_IMPL_H
  32
  33 #include <sys/spa.h>
  34 #include <sys/spa_checkpoint.h>
  35 #include <sys/vdev.h>
  36 #include <sys/vdev_removal.h>
  37 #include <sys/metaslab.h>
  38 #include <sys/dmu.h>
  39 #include <sys/dsl_pool.h>
  40 #include <sys/uberblock_impl.h>
  41 #include <sys/zfs_context.h>
  42 #include <sys/avl.h>
  43 #include <sys/refcount.h>
  44 #include <sys/bplist.h>
  45 #include <sys/bpobj.h>
  46 #include <sys/zfeature.h>
  47 #include <sys/zthr.h>
  48 #include <zfeature_common.h>
  49
  50 #ifdef  __cplusplus
  51 extern "C" {
  52 #endif
  53
  54 typedef struct spa_error_entry {
  55         zbookmark_phys_t        se_bookmark;
  56         char                    *se_name;
  57         avl_node_t              se_avl;
  58 } spa_error_entry_t;
  59
  60 typedef struct spa_history_phys {
  61         uint64_t sh_pool_create_len;    /* ending offset of zpool create */
  62         uint64_t sh_phys_max_off;       /* physical EOF */
  63         uint64_t sh_bof;                /* logical BOF */
  64         uint64_t sh_eof;                /* logical EOF */
  65         uint64_t sh_records_lost;       /* num of records overwritten */
  66 } spa_history_phys_t;
  67
  68 /*
  69  * All members must be uint64_t, for byteswap purposes.
  70  */
  71 typedef struct spa_removing_phys {
  72         uint64_t sr_state; /* dsl_scan_state_t */
  73
  74         /*
  75          * The vdev ID that we most recently attempted to remove,
  76          * or -1 if no removal has been attempted.
  77          */
  78         uint64_t sr_removing_vdev;
  79
  80         /*
  81          * The vdev ID that we most recently successfully removed,
  82          * or -1 if no devices have been removed.
  83          */
  84         uint64_t sr_prev_indirect_vdev;
  85
  86         uint64_t sr_start_time;
  87         uint64_t sr_end_time;
  88
  89         /*
  90          * Note that we can not use the space map's or indirect mapping's
  91          * accounting as a substitute for these values, because we need to
  92          * count frees of not-yet-copied data as though it did the copy.
  93          * Otherwise, we could get into a situation where copied > to_copy,
  94          * or we complete before copied == to_copy.
  95          */
  96         uint64_t sr_to_copy; /* bytes that need to be copied */
  97         uint64_t sr_copied; /* bytes that have been copied or freed */
  98 } spa_removing_phys_t;
  99
 100 /*
 101  * This struct is stored as an entry in the DMU_POOL_DIRECTORY_OBJECT
 102  * (with key DMU_POOL_CONDENSING_INDIRECT).  It is present if a condense
 103  * of an indirect vdev's mapping object is in progress.
 104  */
 105 typedef struct spa_condensing_indirect_phys {
 106         /*
 107          * The vdev ID of the indirect vdev whose indirect mapping is
 108          * being condensed.
 109          */
 110         uint64_t        scip_vdev;
 111
 112         /*
 113          * The vdev's old obsolete spacemap.  This spacemap's contents are
 114          * being integrated into the new mapping.
 115          */
 116         uint64_t        scip_prev_obsolete_sm_object;
 117
 118         /*
 119          * The new mapping object that is being created.
 120          */
 121         uint64_t        scip_next_mapping_object;
 122 } spa_condensing_indirect_phys_t;
 123
 124 struct spa_aux_vdev {
 125         uint64_t        sav_object;             /* MOS object for device list */
 126         nvlist_t        *sav_config;            /* cached device config */
 127         vdev_t          **sav_vdevs;            /* devices */
 128         int             sav_count;              /* number devices */
 129         boolean_t       sav_sync;               /* sync the device list */
 130         nvlist_t        **sav_pending;          /* pending device additions */
 131         uint_t          sav_npending;           /* # pending devices */
 132 };
 133
 134 typedef struct spa_config_lock {
 135         kmutex_t        scl_lock;
 136         kthread_t       *scl_writer;
 137         int             scl_write_wanted;
 138         kcondvar_t      scl_cv;
 139         refcount_t      scl_count;
 140 } spa_config_lock_t;
 141
 142 typedef struct spa_config_dirent {
 143         list_node_t     scd_link;
 144         char            *scd_path;
 145 } spa_config_dirent_t;
 146
 147 typedef enum zio_taskq_type {
 148         ZIO_TASKQ_ISSUE = 0,
 149         ZIO_TASKQ_ISSUE_HIGH,
 150         ZIO_TASKQ_INTERRUPT,
 151         ZIO_TASKQ_INTERRUPT_HIGH,
 152         ZIO_TASKQ_TYPES
 153 } zio_taskq_type_t;
 154
 155 /*
 156  * State machine for the zpool-poolname process.  The states transitions
 157  * are done as follows:
 158  *
 159  *      From               To                   Routine
 160  *      PROC_NONE       -> PROC_CREATED         spa_activate()
 161  *      PROC_CREATED    -> PROC_ACTIVE          spa_thread()
 162  *      PROC_ACTIVE     -> PROC_DEACTIVATE      spa_deactivate()
 163  *      PROC_DEACTIVATE -> PROC_GONE            spa_thread()
 164  *      PROC_GONE       -> PROC_NONE            spa_deactivate()
 165  */
 166 typedef enum spa_proc_state {
 167         SPA_PROC_NONE,          /* spa_proc = &p0, no process created */
 168         SPA_PROC_CREATED,       /* spa_activate() has proc, is waiting */
 169         SPA_PROC_ACTIVE,        /* taskqs created, spa_proc set */
 170         SPA_PROC_DEACTIVATE,    /* spa_deactivate() requests process exit */
 171         SPA_PROC_GONE           /* spa_thread() is exiting, spa_proc = &p0 */
 172 } spa_proc_state_t;
 173
 174 typedef struct spa_taskqs {
 175         uint_t stqs_count;
 176         taskq_t **stqs_taskq;
 177 } spa_taskqs_t;
 178
 179 typedef enum spa_all_vdev_zap_action {
 180         AVZ_ACTION_NONE = 0,
 181         AVZ_ACTION_DESTROY,     /* Destroy all per-vdev ZAPs and the AVZ. */
 182         AVZ_ACTION_REBUILD,     /* Populate the new AVZ, see spa_avz_rebuild */
 183         AVZ_ACTION_INITIALIZE
 184 } spa_avz_action_t;
 185
 186 typedef enum spa_config_source {
 187         SPA_CONFIG_SRC_NONE = 0,
 188         SPA_CONFIG_SRC_SCAN,            /* scan of path (default: /dev/dsk) */
 189         SPA_CONFIG_SRC_CACHEFILE,       /* any cachefile */
 190         SPA_CONFIG_SRC_TRYIMPORT,       /* returned from call to tryimport */
 191         SPA_CONFIG_SRC_SPLIT,           /* new pool in a pool split */
 192         SPA_CONFIG_SRC_MOS              /* MOS, but not always from right txg */
 193 } spa_config_source_t;
 194
 195 struct spa {
 196         /*
 197          * Fields protected by spa_namespace_lock.
 198          */
 199         char            spa_name[ZFS_MAX_DATASET_NAME_LEN];     /* pool name */
 200         char            *spa_comment;           /* comment */
 201         avl_node_t      spa_avl;                /* node in spa_namespace_avl */
 202         nvlist_t        *spa_config;            /* last synced config */
 203         nvlist_t        *spa_config_syncing;    /* currently syncing config */
 204         nvlist_t        *spa_config_splitting;  /* config for splitting */
 205         nvlist_t        *spa_load_info;         /* info and errors from load */
 206         uint64_t        spa_config_txg;         /* txg of last config change */
 207         int             spa_sync_pass;          /* iterate-to-convergence */
 208         pool_state_t    spa_state;              /* pool state */
 209         int             spa_inject_ref;         /* injection references */
 210         uint8_t         spa_sync_on;            /* sync threads are running */
 211         spa_load_state_t spa_load_state;        /* current load operation */
 212         boolean_t       spa_indirect_vdevs_loaded; /* mappings loaded? */
 213         boolean_t       spa_trust_config;       /* do we trust vdev tree? */
 214         spa_config_source_t spa_config_source;  /* where config comes from? */
 215         uint64_t        spa_import_flags;       /* import specific flags */
 216         spa_taskqs_t    spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
 217         dsl_pool_t      *spa_dsl_pool;
 218         boolean_t       spa_is_initializing;    /* true while opening pool */
 219         metaslab_class_t *spa_normal_class;     /* normal data class */
 220         metaslab_class_t *spa_log_class;        /* intent log data class */
 221         uint64_t        spa_first_txg;          /* first txg after spa_open() */
 222         uint64_t        spa_final_txg;          /* txg of export/destroy */
 223         uint64_t        spa_freeze_txg;         /* freeze pool at this txg */
 224         uint64_t        spa_load_max_txg;       /* best initial ub_txg */
 225         uint64_t        spa_claim_max_txg;      /* highest claimed birth txg */
 226         timespec_t      spa_loaded_ts;          /* 1st successful open time */
 227         objset_t        *spa_meta_objset;       /* copy of dp->dp_meta_objset */
 228         kmutex_t        spa_evicting_os_lock;   /* Evicting objset list lock */
 229         list_t          spa_evicting_os_list;   /* Objsets being evicted. */
 230         kcondvar_t      spa_evicting_os_cv;     /* Objset Eviction Completion */
 231         txg_list_t      spa_vdev_txg_list;      /* per-txg dirty vdev list */
 232         vdev_t          *spa_root_vdev;         /* top-level vdev container */
 233         int             spa_min_ashift;         /* of vdevs in normal class */
 234         int             spa_max_ashift;         /* of vdevs in normal class */
 235         uint64_t        spa_config_guid;        /* config pool guid */
 236         uint64_t        spa_load_guid;          /* spa_load initialized guid */
 237         uint64_t        spa_last_synced_guid;   /* last synced guid */
 238         list_t          spa_config_dirty_list;  /* vdevs with dirty config */
 239         list_t          spa_state_dirty_list;   /* vdevs with dirty state */
 240         /*
 241          * spa_alloc_locks and spa_alloc_trees are arrays, whose lengths are
 242          * stored in spa_alloc_count. There is one tree and one lock for each
 243          * allocator, to help improve allocation performance in write-heavy
 244          * workloads.
 245          */
 246         kmutex_t        *spa_alloc_locks;
 247         avl_tree_t      *spa_alloc_trees;
 248         int             spa_alloc_count;
 249
 250         spa_aux_vdev_t  spa_spares;             /* hot spares */
 251         spa_aux_vdev_t  spa_l2cache;            /* L2ARC cache devices */
 252         nvlist_t        *spa_label_features;    /* Features for reading MOS */
 253         uint64_t        spa_config_object;      /* MOS object for pool config */
 254         uint64_t        spa_config_generation;  /* config generation number */
 255         uint64_t        spa_syncing_txg;        /* txg currently syncing */
 256         bpobj_t         spa_deferred_bpobj;     /* deferred-free bplist */
 257         bplist_t        spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */
 258         zio_cksum_salt_t spa_cksum_salt;        /* secret salt for cksum */
 259         /* checksum context templates */
 260         kmutex_t        spa_cksum_tmpls_lock;
 261         void            *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS];
 262         uberblock_t     spa_ubsync;             /* last synced uberblock */
 263         uberblock_t     spa_uberblock;          /* current uberblock */
 264         boolean_t       spa_extreme_rewind;     /* rewind past deferred frees */
 265         uint64_t        spa_last_io;            /* lbolt of last non-scan I/O */
 266         kmutex_t        spa_scrub_lock;         /* resilver/scrub lock */
 267         uint64_t        spa_scrub_inflight;     /* in-flight scrub I/Os */
 268         kcondvar_t      spa_scrub_io_cv;        /* scrub I/O completion */
 269         uint8_t         spa_scrub_active;       /* active or suspended? */
 270         uint8_t         spa_scrub_type;         /* type of scrub we're doing */
 271         uint8_t         spa_scrub_finished;     /* indicator to rotate logs */
 272         uint8_t         spa_scrub_started;      /* started since last boot */
 273         uint8_t         spa_scrub_reopen;       /* scrub doing vdev_reopen */
 274         uint64_t        spa_scan_pass_start;    /* start time per pass/reboot */
 275         uint64_t        spa_scan_pass_scrub_pause; /* scrub pause time */
 276         uint64_t        spa_scan_pass_scrub_spent_paused; /* total paused */
 277         uint64_t        spa_scan_pass_exam;     /* examined bytes per pass */
 278         kmutex_t        spa_async_lock;         /* protect async state */
 279         kthread_t       *spa_async_thread;      /* thread doing async task */
 280         int             spa_async_suspended;    /* async tasks suspended */
 281         kcondvar_t      spa_async_cv;           /* wait for thread_exit() */
 282         uint16_t        spa_async_tasks;        /* async task mask */
 283         uint64_t        spa_missing_tvds;       /* unopenable tvds on load */
 284         uint64_t        spa_missing_tvds_allowed; /* allow loading spa? */
 285
 286         spa_removing_phys_t spa_removing_phys;
 287         spa_vdev_removal_t *spa_vdev_removal;
 288
 289         spa_condensing_indirect_phys_t  spa_condensing_indirect_phys;
 290         spa_condensing_indirect_t       *spa_condensing_indirect;
 291         zthr_t          *spa_condense_zthr;     /* zthr doing condense. */
 292
 293         uint64_t        spa_checkpoint_txg;     /* the txg of the checkpoint */
 294         spa_checkpoint_info_t spa_checkpoint_info; /* checkpoint accounting */
 295         zthr_t          *spa_checkpoint_discard_zthr;
 296
 297         char            *spa_root;              /* alternate root directory */
 298         uint64_t        spa_ena;                /* spa-wide ereport ENA */
 299         int             spa_last_open_failed;   /* error if last open failed */
 300         uint64_t        spa_last_ubsync_txg;    /* "best" uberblock txg */
 301         uint64_t        spa_last_ubsync_txg_ts; /* timestamp from that ub */
 302         uint64_t        spa_load_txg;           /* ub txg that loaded */
 303         uint64_t        spa_load_txg_ts;        /* timestamp from that ub */
 304         uint64_t        spa_load_meta_errors;   /* verify metadata err count */
 305         uint64_t        spa_load_data_errors;   /* verify data err count */
 306         uint64_t        spa_verify_min_txg;     /* start txg of verify scrub */
 307         kmutex_t        spa_errlog_lock;        /* error log lock */
 308         uint64_t        spa_errlog_last;        /* last error log object */
 309         uint64_t        spa_errlog_scrub;       /* scrub error log object */
 310         kmutex_t        spa_errlist_lock;       /* error list/ereport lock */
 311         avl_tree_t      spa_errlist_last;       /* last error list */
 312         avl_tree_t      spa_errlist_scrub;      /* scrub error list */
 313         uint64_t        spa_deflate;            /* should we deflate? */
 314         uint64_t        spa_history;            /* history object */
 315         kmutex_t        spa_history_lock;       /* history lock */
 316         vdev_t          *spa_pending_vdev;      /* pending vdev additions */
 317         kmutex_t        spa_props_lock;         /* property lock */
 318         uint64_t        spa_pool_props_object;  /* object for properties */
 319         uint64_t        spa_bootfs;             /* default boot filesystem */
 320         uint64_t        spa_failmode;           /* failure mode for the pool */
 321         uint64_t        spa_delegation;         /* delegation on/off */
 322         list_t          spa_config_list;        /* previous cache file(s) */
 323         /* per-CPU array of root of async I/O: */
 324         zio_t           **spa_async_zio_root;
 325         zio_t           *spa_suspend_zio_root;  /* root of all suspended I/O */
 326         zio_t           *spa_txg_zio[TXG_SIZE]; /* spa_sync() waits for this */
 327         kmutex_t        spa_suspend_lock;       /* protects suspend_zio_root */
 328         kcondvar_t      spa_suspend_cv;         /* notification of resume */
 329         uint8_t         spa_suspended;          /* pool is suspended */
 330         uint8_t         spa_claiming;           /* pool is doing zil_claim() */
 331         boolean_t       spa_debug;              /* debug enabled? */
 332         boolean_t       spa_is_root;            /* pool is root */
 333         int             spa_minref;             /* num refs when first opened */
 334         int             spa_mode;               /* FREAD | FWRITE */
 335         spa_log_state_t spa_log_state;          /* log state */
 336         uint64_t        spa_autoexpand;         /* lun expansion on/off */
 337         uint64_t        spa_bootsize;           /* efi system partition size */
 338         ddt_t           *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */
 339         uint64_t        spa_ddt_stat_object;    /* DDT statistics */
 340         uint64_t        spa_dedup_ditto;        /* dedup ditto threshold */
 341         uint64_t        spa_dedup_checksum;     /* default dedup checksum */
 342         uint64_t        spa_dspace;             /* dspace in normal class */
 343         kmutex_t        spa_vdev_top_lock;      /* dueling offline/remove */
 344         kmutex_t        spa_proc_lock;          /* protects spa_proc* */
 345         kcondvar_t      spa_proc_cv;            /* spa_proc_state transitions */
 346         spa_proc_state_t spa_proc_state;        /* see definition */
 347         struct proc     *spa_proc;              /* "zpool-poolname" process */
 348         uint64_t        spa_did;                /* if procp != p0, did of t1 */
 349         boolean_t       spa_autoreplace;        /* autoreplace set in open */
 350         int             spa_vdev_locks;         /* locks grabbed */
 351         uint64_t        spa_creation_version;   /* version at pool creation */
 352         uint64_t        spa_prev_software_version; /* See ub_software_version */
 353         uint64_t        spa_feat_for_write_obj; /* required to write to pool */
 354         uint64_t        spa_feat_for_read_obj;  /* required to read from pool */
 355         uint64_t        spa_feat_desc_obj;      /* Feature descriptions */
 356         uint64_t        spa_feat_enabled_txg_obj; /* Feature enabled txg */
 357         /* cache feature refcounts */
 358         uint64_t        spa_feat_refcount_cache[SPA_FEATURES];
 359         cyclic_id_t     spa_deadman_cycid;      /* cyclic id */
 360         uint64_t        spa_deadman_calls;      /* number of deadman calls */
 361         hrtime_t        spa_sync_starttime;     /* starting time fo spa_sync */
 362         uint64_t        spa_deadman_synctime;   /* deadman expiration timer */
 363         uint64_t        spa_all_vdev_zaps;      /* ZAP of per-vd ZAP obj #s */
 364         spa_avz_action_t        spa_avz_action; /* destroy/rebuild AVZ? */
 365
 366         /*
 367          * spa_iokstat_lock protects spa_iokstat and
 368          * spa_queue_stats[].
 369          */
 370         kmutex_t        spa_iokstat_lock;
 371         struct kstat    *spa_iokstat;           /* kstat of io to this pool */
 372         struct {
 373                 int spa_active;
 374                 int spa_queued;
 375         } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE];
 376
 377         hrtime_t        spa_ccw_fail_time;      /* Conf cache write fail time */
 378
 379         /*
 380          * spa_refcount & spa_config_lock must be the last elements
 381          * because refcount_t changes size based on compilation options.
 382          * In order for the MDB module to function correctly, the other
 383          * fields must remain in the same location.
 384          */
 385         spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
 386         refcount_t      spa_refcount;           /* number of opens */
 387 };
 388
 389 extern const char *spa_config_path;
 390
 391 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
 392     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent);
 393 extern void spa_load_spares(spa_t *spa);
 394 extern void spa_load_l2cache(spa_t *spa);
 395
 396 #ifdef  __cplusplus
 397 }
 398 #endif
 399
 400 #endif  /* _SYS_SPA_IMPL_H */