ba210e8afe
Note that due to e.g. write throttling ('wdrain'), it can stall all the disk
I/O instead of just the device it's configured for. Using it for removable
media is therefore not a good idea.
Reviewed by: pjd (earlier version)
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*-
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* Copyright (c) 2010 Edward Tomasz Napierala <trasz@FreeBSD.org>
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* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _G_MOUNTVER_H_
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#define _G_MOUNTVER_H_
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#define G_MOUNTVER_CLASS_NAME "MOUNTVER"
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#define G_MOUNTVER_VERSION 4
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#define G_MOUNTVER_SUFFIX ".mountver"
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#ifdef _KERNEL
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#define G_MOUNTVER_DEBUG(lvl, ...) do { \
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if (g_mountver_debug >= (lvl)) { \
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printf("GEOM_MOUNTVER"); \
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if (g_mountver_debug > 0) \
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printf("[%u]", lvl); \
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printf(": "); \
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printf(__VA_ARGS__); \
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printf("\n"); \
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} \
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} while (0)
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#define G_MOUNTVER_LOGREQ(bp, ...) do { \
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if (g_mountver_debug >= 2) { \
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printf("GEOM_MOUNTVER[2]: "); \
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printf(__VA_ARGS__); \
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printf(" "); \
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g_print_bio(bp); \
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printf("\n"); \
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} \
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} while (0)
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struct g_mountver_softc {
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TAILQ_HEAD(, bio) sc_queue;
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struct mtx sc_mtx;
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char *sc_provider_name;
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char sc_ident[DISK_IDENT_SIZE];
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int sc_orphaned;
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int sc_access_r;
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int sc_access_w;
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int sc_access_e;
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};
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#endif /* _KERNEL */
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#endif /* _G_MOUNTVER_H_ */
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