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freebsd/sys/geom/nop/g_nop.h
Alan Somers 6f7f85e0e1 gnop(8): add the ability to set a nop provider's physical path
While I'm here, expand the existing tests a bit.

MFC after:	3 weeks
Differential Revision:	https://reviews.freebsd.org/D13579
2018-01-18 05:57:10 +00:00

89 lines
2.7 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _G_NOP_H_
#define _G_NOP_H_
#define G_NOP_CLASS_NAME "NOP"
#define G_NOP_VERSION 4
#define G_NOP_SUFFIX ".nop"
/*
* Special flag to instruct gnop to passthrough the underlying provider's
* physical path
*/
#define G_NOP_PHYSPATH_PASSTHROUGH "\255"
#ifdef _KERNEL
#define G_NOP_DEBUG(lvl, ...) do { \
if (g_nop_debug >= (lvl)) { \
printf("GEOM_NOP"); \
if (g_nop_debug > 0) \
printf("[%u]", lvl); \
printf(": "); \
printf(__VA_ARGS__); \
printf("\n"); \
} \
} while (0)
#define G_NOP_LOGREQ(bp, ...) G_NOP_LOGREQLVL(2, bp, __VA_ARGS__)
#define G_NOP_LOGREQLVL(lvl, bp, ...) do { \
if (g_nop_debug >= (lvl)) { \
printf("GEOM_NOP[%d]: ", (lvl)); \
printf(__VA_ARGS__); \
printf(" "); \
g_print_bio(bp); \
printf("\n"); \
} \
} while (0)
struct g_nop_softc {
int sc_error;
off_t sc_offset;
off_t sc_explicitsize;
off_t sc_stripesize;
off_t sc_stripeoffset;
u_int sc_rfailprob;
u_int sc_wfailprob;
uintmax_t sc_reads;
uintmax_t sc_writes;
uintmax_t sc_deletes;
uintmax_t sc_getattrs;
uintmax_t sc_flushes;
uintmax_t sc_cmd0s;
uintmax_t sc_cmd1s;
uintmax_t sc_cmd2s;
uintmax_t sc_readbytes;
uintmax_t sc_wrotebytes;
char* sc_physpath;
struct mtx sc_lock;
};
#endif /* _KERNEL */
#endif /* _G_NOP_H_ */