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During the original ZoL port the vdev_uses_zvols() function was disabled until it could be properly implemented. This prevented a zpool from use a zvol for its slog device. This patch implements that missing functionality by adding a zvol_is_zvol() function to zvol.c. Given the full path to a device it will lookup the device and verify its major number against the registered zvol major number for the system. If they match we know the device is a zvol. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1131
53 lines
1.7 KiB
C
53 lines
1.7 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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*/
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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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#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(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_create_minor(const char *);
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extern int zvol_create_minors(const char *);
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extern int zvol_remove_minor(const char *);
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extern void zvol_remove_minors(const char *);
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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_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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