FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/vdev_rebuild.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) 2018, Intel Corporation.
     * Copyright (c) 2020 by Lawrence Livermore National Security, LLC.
     */
    
    #ifndef _SYS_VDEV_REBUILD_H
    #define _SYS_VDEV_REBUILD_H
    
    #include <sys/spa.h>
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    /*
     * Number of entries in the physical vdev_rebuild_phys structure.  This
     * state is stored per top-level as VDEV_ZAP_TOP_VDEV_REBUILD_PHYS.
     */
    #define REBUILD_PHYS_ENTRIES    12
    
    /*
     * On-disk rebuild configuration and state.  When adding new fields they
     * must be added to the end of the structure.
     */
    typedef struct vdev_rebuild_phys {
            uint64_t        vrp_rebuild_state;      /* vdev_rebuild_state_t */
            uint64_t        vrp_last_offset;        /* last rebuilt offset */
            uint64_t        vrp_min_txg;            /* minimum missing txg */
            uint64_t        vrp_max_txg;            /* maximum missing txg */
            uint64_t        vrp_start_time;         /* start time */
            uint64_t        vrp_end_time;           /* end time */
            uint64_t        vrp_scan_time_ms;       /* total run time in ms */
            uint64_t        vrp_bytes_scanned;      /* alloc bytes scanned */
            uint64_t        vrp_bytes_issued;       /* read bytes rebuilt */
            uint64_t        vrp_bytes_rebuilt;      /* rebuilt bytes */
            uint64_t        vrp_bytes_est;          /* total bytes to scan */
            uint64_t        vrp_errors;             /* errors during rebuild */
    } vdev_rebuild_phys_t;
    
    /*
     * The vdev_rebuild_t describes the current state and how a top-level vdev
     * should be rebuilt.  The core elements are the top-vdev, the metaslab being
     * rebuilt, range tree containing the allocated extents and the on-disk state.
     */
    typedef struct vdev_rebuild {
            vdev_t          *vr_top_vdev;           /* top-level vdev to rebuild */
            metaslab_t      *vr_scan_msp;           /* scanning disabled metaslab */
            range_tree_t    *vr_scan_tree;          /* scan ranges (in metaslab) */
            kmutex_t        vr_io_lock;             /* inflight IO lock */
            kcondvar_t      vr_io_cv;               /* inflight IO cv */
    
            /* In-core state and progress */
            uint64_t        vr_scan_offset[TXG_SIZE];
            uint64_t        vr_prev_scan_time_ms;   /* any previous scan time */
            uint64_t        vr_bytes_inflight_max;  /* maximum bytes inflight */
            uint64_t        vr_bytes_inflight;      /* current bytes inflight */
    
            /* Per-rebuild pass statistics for calculating bandwidth */
            uint64_t        vr_pass_start_time;
            uint64_t        vr_pass_bytes_scanned;
            uint64_t        vr_pass_bytes_issued;
    
            /* On-disk state updated by vdev_rebuild_zap_update_sync() */
            vdev_rebuild_phys_t vr_rebuild_phys;
    } vdev_rebuild_t;
    
    boolean_t vdev_rebuild_active(vdev_t *);
    
    int vdev_rebuild_load(vdev_t *);
    void vdev_rebuild(vdev_t *);
    void vdev_rebuild_stop_wait(vdev_t *);
    void vdev_rebuild_stop_all(spa_t *);
    void vdev_rebuild_restart(spa_t *);
    void vdev_rebuild_clear_sync(void *, dmu_tx_t *);
    int vdev_rebuild_get_stats(vdev_t *, vdev_rebuild_stat_t *);
    
    #ifdef  __cplusplus
    }
    #endif
   
   #endif /* _SYS_VDEV_REBUILD_H */

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