FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/vdev.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    /*
     * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
     * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
     * Copyright (c) 2017, Intel Corporation.
     * Copyright (c) 2019, Datto Inc. All rights reserved.
     */
    
    #ifndef _SYS_VDEV_H
    #define _SYS_VDEV_H
    
    #include <sys/spa.h>
    #include <sys/zio.h>
    #include <sys/dmu.h>
    #include <sys/space_map.h>
    #include <sys/metaslab.h>
    #include <sys/fs/zfs.h>
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    typedef enum vdev_dtl_type {
            DTL_MISSING,    /* 0% replication: no copies of the data */
            DTL_PARTIAL,    /* less than 100% replication: some copies missing */
            DTL_SCRUB,      /* unable to fully repair during scrub/resilver */
            DTL_OUTAGE,     /* temporarily missing (used to attempt detach) */
            DTL_TYPES
    } vdev_dtl_type_t;
    
    extern int zfs_nocacheflush;
    
    typedef boolean_t vdev_open_children_func_t(vdev_t *vd);
    
    extern void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...)
        __attribute__((format(printf, 2, 3)));
    extern void vdev_dbgmsg_print_tree(vdev_t *, int);
    extern int vdev_open(vdev_t *);
    extern void vdev_open_children(vdev_t *);
    extern void vdev_open_children_subset(vdev_t *, vdev_open_children_func_t *);
    extern int vdev_validate(vdev_t *);
    extern int vdev_copy_path_strict(vdev_t *, vdev_t *);
    extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *);
    extern void vdev_close(vdev_t *);
    extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
    extern void vdev_reopen(vdev_t *);
    extern int vdev_validate_aux(vdev_t *vd);
    extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
    extern boolean_t vdev_is_concrete(vdev_t *vd);
    extern boolean_t vdev_is_bootable(vdev_t *vd);
    extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
    extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
    extern int vdev_count_leaves(spa_t *spa);
    extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
        uint64_t txg, uint64_t size);
    extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
        uint64_t txg, uint64_t size);
    extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
    extern boolean_t vdev_default_need_resilver(vdev_t *vd, const dva_t *dva,
        size_t psize, uint64_t phys_birth);
    extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, const dva_t *dva,
        size_t psize, uint64_t phys_birth);
    extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
        boolean_t scrub_done, boolean_t rebuild_done);
    extern boolean_t vdev_dtl_required(vdev_t *vd);
    extern boolean_t vdev_resilver_needed(vdev_t *vd,
        uint64_t *minp, uint64_t *maxp);
    extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
        dmu_tx_t *tx);
    extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
    extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
    extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
    extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
        uint64_t size);
    extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
        uint64_t offset, uint64_t size, dmu_tx_t *tx);
    extern boolean_t vdev_replace_in_progress(vdev_t *vdev);
    
    extern void vdev_hold(vdev_t *);
   extern void vdev_rele(vdev_t *);
   
   extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
   extern void vdev_metaslab_fini(vdev_t *vd);
   extern void vdev_metaslab_set_size(vdev_t *);
   extern void vdev_expand(vdev_t *vd, uint64_t txg);
   extern void vdev_split(vdev_t *vd);
   extern void vdev_deadman(vdev_t *vd, const char *tag);
   
   typedef void vdev_xlate_func_t(void *arg, range_seg64_t *physical_rs);
   
   extern boolean_t vdev_xlate_is_empty(range_seg64_t *rs);
   extern void vdev_xlate(vdev_t *vd, const range_seg64_t *logical_rs,
       range_seg64_t *physical_rs, range_seg64_t *remain_rs);
   extern void vdev_xlate_walk(vdev_t *vd, const range_seg64_t *logical_rs,
       vdev_xlate_func_t *func, void *arg);
   
   extern void vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx);
   
   extern metaslab_group_t *vdev_get_mg(vdev_t *vd, metaslab_class_t *mc);
   
   extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
   extern void vdev_clear_stats(vdev_t *vd);
   extern void vdev_stat_update(zio_t *zio, uint64_t psize);
   extern void vdev_scan_stat_init(vdev_t *vd);
   extern void vdev_propagate_state(vdev_t *vd);
   extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
       vdev_aux_t aux);
   extern boolean_t vdev_children_are_offline(vdev_t *vd);
   
   extern void vdev_space_update(vdev_t *vd,
       int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
   
   extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space);
   
   extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
   
   /*
    * Return the amount of space allocated for a gang block header.
    */
   static inline uint64_t
   vdev_gang_header_asize(vdev_t *vd)
   {
           return (vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE));
   }
   
   extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
   extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
   extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
       vdev_state_t *);
   extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
   extern int vdev_remove_wanted(spa_t *spa, uint64_t guid);
   extern void vdev_clear(spa_t *spa, vdev_t *vd);
   
   extern boolean_t vdev_is_dead(vdev_t *vd);
   extern boolean_t vdev_readable(vdev_t *vd);
   extern boolean_t vdev_writeable(vdev_t *vd);
   extern boolean_t vdev_allocatable(vdev_t *vd);
   extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
   extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd);
   
   extern void vdev_cache_init(vdev_t *vd);
   extern void vdev_cache_fini(vdev_t *vd);
   extern boolean_t vdev_cache_read(zio_t *zio);
   extern void vdev_cache_write(zio_t *zio);
   extern void vdev_cache_purge(vdev_t *vd);
   
   extern void vdev_queue_init(vdev_t *vd);
   extern void vdev_queue_fini(vdev_t *vd);
   extern zio_t *vdev_queue_io(zio_t *zio);
   extern void vdev_queue_io_done(zio_t *zio);
   extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority);
   
   extern int vdev_queue_length(vdev_t *vd);
   extern uint64_t vdev_queue_last_offset(vdev_t *vd);
   
   extern void vdev_config_dirty(vdev_t *vd);
   extern void vdev_config_clean(vdev_t *vd);
   extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
   
   extern void vdev_state_dirty(vdev_t *vd);
   extern void vdev_state_clean(vdev_t *vd);
   
   extern void vdev_defer_resilver(vdev_t *vd);
   extern boolean_t vdev_clear_resilver_deferred(vdev_t *vd, dmu_tx_t *tx);
   
   typedef enum vdev_config_flag {
           VDEV_CONFIG_SPARE = 1 << 0,
           VDEV_CONFIG_L2CACHE = 1 << 1,
           VDEV_CONFIG_REMOVING = 1 << 2,
           VDEV_CONFIG_MOS = 1 << 3,
           VDEV_CONFIG_MISSING = 1 << 4
   } vdev_config_flag_t;
   
   extern void vdev_post_kobj_evt(vdev_t *vd);
   extern void vdev_clear_kobj_evt(vdev_t *vd);
   extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
   extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
       boolean_t getstats, vdev_config_flag_t flags);
   
   /*
    * Label routines
    */
   struct uberblock;
   extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
   extern int vdev_label_number(uint64_t psise, uint64_t offset);
   extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
   extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
   extern void vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv);
   extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
       offset, uint64_t size, zio_done_func_t *done, void *priv, int flags);
   extern int vdev_label_read_bootenv(vdev_t *, nvlist_t *);
   extern int vdev_label_write_bootenv(vdev_t *, nvlist_t *);
   
   typedef enum {
           VDEV_LABEL_CREATE,      /* create/add a new device */
           VDEV_LABEL_REPLACE,     /* replace an existing device */
           VDEV_LABEL_SPARE,       /* add a new hot spare */
           VDEV_LABEL_REMOVE,      /* remove an existing device */
           VDEV_LABEL_L2CACHE,     /* add an L2ARC cache device */
           VDEV_LABEL_SPLIT        /* generating new label for split-off dev */
   } vdev_labeltype_t;
   
   extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
   
   extern int vdev_prop_set(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl);
   extern int vdev_prop_get(vdev_t *vd, nvlist_t *nvprops, nvlist_t *outnvl);
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif  /* _SYS_VDEV_H */

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