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2696dfafd9
3642 dsl_scan_active() should not issue I/O to determine if async
destroying is active
3643 txg_delay should not hold the tc_lock
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Approved by: Gordon Ross <gwr@nexenta.com>
References:
https://www.illumos.org/issues/3642
https://www.illumos.org/issues/3643
illumos/illumos-gate@4a92375985
Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
Porting Notes:
1. The alignment assumptions for the tx_cpu structure assume that
a kmutex_t is 8 bytes. This isn't true under Linux but tc_pad[]
was adjusted anyway for consistency since this structure was
never carefully aligned in ZoL. If careful alignment does impact
performance significantly this should be reworked to be portable.
114 lines
3.3 KiB
C
114 lines
3.3 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 http://www.opensolaris.org/os/licensing.
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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) 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_DSL_SCAN_H
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#define _SYS_DSL_SCAN_H
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#include <sys/zfs_context.h>
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#include <sys/zio.h>
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#include <sys/ddt.h>
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#include <sys/bplist.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct objset;
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struct dsl_dir;
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struct dsl_dataset;
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struct dsl_pool;
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struct dmu_tx;
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/*
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* All members of this structure must be uint64_t, for byteswap
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* purposes.
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*/
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typedef struct dsl_scan_phys {
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uint64_t scn_func; /* pool_scan_func_t */
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uint64_t scn_state; /* dsl_scan_state_t */
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uint64_t scn_queue_obj;
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uint64_t scn_min_txg;
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uint64_t scn_max_txg;
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uint64_t scn_cur_min_txg;
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uint64_t scn_cur_max_txg;
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uint64_t scn_start_time;
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uint64_t scn_end_time;
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uint64_t scn_to_examine; /* total bytes to be scanned */
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uint64_t scn_examined; /* bytes scanned so far */
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uint64_t scn_to_process;
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uint64_t scn_processed;
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uint64_t scn_errors; /* scan I/O error count */
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uint64_t scn_ddt_class_max;
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ddt_bookmark_t scn_ddt_bookmark;
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zbookmark_t scn_bookmark;
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uint64_t scn_flags; /* dsl_scan_flags_t */
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} dsl_scan_phys_t;
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#define SCAN_PHYS_NUMINTS (sizeof (dsl_scan_phys_t) / sizeof (uint64_t))
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typedef enum dsl_scan_flags {
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DSF_VISIT_DS_AGAIN = 1<<0,
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} dsl_scan_flags_t;
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typedef struct dsl_scan {
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struct dsl_pool *scn_dp;
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boolean_t scn_pausing;
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uint64_t scn_restart_txg;
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uint64_t scn_sync_start_time;
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zio_t *scn_zio_root;
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/* for freeing blocks */
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boolean_t scn_is_bptree;
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boolean_t scn_async_destroying;
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/* for debugging / information */
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uint64_t scn_visited_this_txg;
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dsl_scan_phys_t scn_phys;
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} dsl_scan_t;
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int dsl_scan_init(struct dsl_pool *dp, uint64_t txg);
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void dsl_scan_fini(struct dsl_pool *dp);
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void dsl_scan_sync(struct dsl_pool *, dmu_tx_t *);
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int dsl_scan_cancel(struct dsl_pool *);
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int dsl_scan(struct dsl_pool *, pool_scan_func_t);
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void dsl_resilver_restart(struct dsl_pool *, uint64_t txg);
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boolean_t dsl_scan_resilvering(struct dsl_pool *dp);
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boolean_t dsl_dataset_unstable(struct dsl_dataset *ds);
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void dsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,
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ddt_entry_t *dde, dmu_tx_t *tx);
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void dsl_scan_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
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void dsl_scan_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
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void dsl_scan_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
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struct dmu_tx *tx);
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boolean_t dsl_scan_active(dsl_scan_t *scn);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_SCAN_H */
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