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fa7b2390d4
Scan process may skip blocks based on their birth time, DVA, etc.
Traditionally those blocks were accounted as issued, that caused
reporting of hugely over-inflated numbers, having nothing to do
with actual disk I/O. This change utilizes never used field in
struct dsl_scan_phys to account such skipped bytes, allowing to
report how much data were actually scrubbed/resilvered and what
is the actual I/O speed. While formally it is an on-disk format
change, it should be compatible both ways, so should not need a
feature flag.
This should partially address the same issue as c85ac731a0, but
from a different perspective, complementing it.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Akash B <akash-b@hpe.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes #15007
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2018, Intel Corporation.
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* Copyright (c) 2020 by Lawrence Livermore National Security, LLC.
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*/
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#ifndef _SYS_VDEV_REBUILD_H
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#define _SYS_VDEV_REBUILD_H
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#include <sys/spa.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Number of entries in the physical vdev_rebuild_phys structure. This
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* state is stored per top-level as VDEV_ZAP_TOP_VDEV_REBUILD_PHYS.
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*/
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#define REBUILD_PHYS_ENTRIES 12
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/*
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* On-disk rebuild configuration and state. When adding new fields they
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* must be added to the end of the structure.
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*/
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typedef struct vdev_rebuild_phys {
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uint64_t vrp_rebuild_state; /* vdev_rebuild_state_t */
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uint64_t vrp_last_offset; /* last rebuilt offset */
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uint64_t vrp_min_txg; /* minimum missing txg */
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uint64_t vrp_max_txg; /* maximum missing txg */
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uint64_t vrp_start_time; /* start time */
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uint64_t vrp_end_time; /* end time */
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uint64_t vrp_scan_time_ms; /* total run time in ms */
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uint64_t vrp_bytes_scanned; /* alloc bytes scanned */
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uint64_t vrp_bytes_issued; /* read bytes rebuilt */
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uint64_t vrp_bytes_rebuilt; /* rebuilt bytes */
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uint64_t vrp_bytes_est; /* total bytes to scan */
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uint64_t vrp_errors; /* errors during rebuild */
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} vdev_rebuild_phys_t;
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/*
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* The vdev_rebuild_t describes the current state and how a top-level vdev
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* should be rebuilt. The core elements are the top-vdev, the metaslab being
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* rebuilt, range tree containing the allocated extents and the on-disk state.
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*/
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typedef struct vdev_rebuild {
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vdev_t *vr_top_vdev; /* top-level vdev to rebuild */
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metaslab_t *vr_scan_msp; /* scanning disabled metaslab */
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range_tree_t *vr_scan_tree; /* scan ranges (in metaslab) */
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kmutex_t vr_io_lock; /* inflight IO lock */
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kcondvar_t vr_io_cv; /* inflight IO cv */
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/* In-core state and progress */
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uint64_t vr_scan_offset[TXG_SIZE];
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uint64_t vr_prev_scan_time_ms; /* any previous scan time */
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uint64_t vr_bytes_inflight_max; /* maximum bytes inflight */
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uint64_t vr_bytes_inflight; /* current bytes inflight */
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/* Per-rebuild pass statistics for calculating bandwidth */
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uint64_t vr_pass_start_time;
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uint64_t vr_pass_bytes_scanned;
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uint64_t vr_pass_bytes_issued;
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uint64_t vr_pass_bytes_skipped;
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/* On-disk state updated by vdev_rebuild_zap_update_sync() */
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vdev_rebuild_phys_t vr_rebuild_phys;
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} vdev_rebuild_t;
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boolean_t vdev_rebuild_active(vdev_t *);
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int vdev_rebuild_load(vdev_t *);
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void vdev_rebuild(vdev_t *);
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void vdev_rebuild_stop_wait(vdev_t *);
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void vdev_rebuild_stop_all(spa_t *);
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void vdev_rebuild_restart(spa_t *);
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void vdev_rebuild_clear_sync(void *, dmu_tx_t *);
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int vdev_rebuild_get_stats(vdev_t *, vdev_rebuild_stat_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_VDEV_REBUILD_H */
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