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zfsonlinux issue #2217 - zvol minor operations: check snapdev property before traversing snapshots of a dataset zfsonlinux issue #3681 - lock order inversion between zvol_open() and dsl_pool_sync()...zvol_rename_minors() Create a per-pool zvol taskq for asynchronous zvol tasks. There are a few key design decisions to be aware of. * Each taskq must be single threaded to ensure tasks are always processed in the order in which they were dispatched. * There is a taskq per-pool in order to keep the pools independent. This way if one pool is suspended it will not impact another. * The preferred location to dispatch a zvol minor task is a sync task. In this context there is easy access to the spa_t and minimal error handling is required because the sync task must succeed. Support for asynchronous zvol minor operations address issue #3681. Signed-off-by: Boris Protopopov <boris.protopopov@actifio.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #2217 Closes #3678 Closes #3681
54 lines
1.9 KiB
C
54 lines
1.9 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) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2016 Actifio, Inc. All rights reserved.
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*/
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#ifndef _SYS_ZVOL_H
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#define _SYS_ZVOL_H
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#include <sys/zfs_context.h>
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#define ZVOL_OBJ 1ULL
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#define ZVOL_ZAP_OBJ 2ULL
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extern void zvol_create_minors(spa_t *spa, const char *name, boolean_t async);
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extern void zvol_remove_minors(spa_t *spa, const char *name, boolean_t async);
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extern void zvol_rename_minors(spa_t *spa, const char *oldname,
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const char *newname, boolean_t async);
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#ifdef _KERNEL
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extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
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extern int zvol_check_volblocksize(const char *name, uint64_t volblocksize);
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extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
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extern boolean_t zvol_is_zvol(const char *);
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extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
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extern int zvol_set_volsize(const char *, uint64_t);
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extern int zvol_set_volblocksize(const char *, uint64_t);
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extern int zvol_set_snapdev(const char *, zprop_source_t, uint64_t);
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extern int zvol_init(void);
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extern void zvol_fini(void);
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#endif /* _KERNEL */
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#endif /* _SYS_ZVOL_H */
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