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g_multipath.c
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g_multipath.h
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Editing: g_multipath.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2006-2007 Matthew Jacob <mjacob@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. * * $FreeBSD$ */ /* * Based upon work by Pawel Jakub Dawidek <pjd@FreeBSD.org> for all of the * fine geom examples, and by Poul Henning Kamp <phk@FreeBSD.org> for GEOM * itself, all of which is most gratefully acknowledged. */ #ifndef _G_MULTIPATH_H_ #define _G_MULTIPATH_H_ #define G_MULTIPATH_CLASS_NAME "MULTIPATH" #define G_MULTIPATH_VERSION 1 #define G_MULTIPATH_MAGIC "GEOM::MULTIPATH" #include <sys/endian.h> #ifdef _KERNEL struct g_multipath_softc { struct g_provider * sc_pp; struct g_consumer * sc_active; struct mtx sc_mtx; char sc_name[16]; char sc_uuid[40]; off_t sc_size; int sc_opened; int sc_stopping; int sc_ndisks; int sc_active_active; /* Active/Active mode */ }; #endif /* _KERNEL */ struct g_multipath_metadata { char md_magic[16]; /* Magic Value */ char md_uuid[40]; /* more magic */ char md_name[16]; /* a friendly name */ uint32_t md_version; /* version */ uint32_t md_sectorsize; /* sectorsize of provider */ uint64_t md_size; /* absolute size of provider */ uint8_t md_active_active; /* Active/Active mode */ }; static __inline void multipath_metadata_encode(const struct g_multipath_metadata *, u_char *); static __inline void multipath_metadata_decode(u_char *, struct g_multipath_metadata *); static __inline void multipath_metadata_encode(const struct g_multipath_metadata *md, u_char *data) { bcopy(md->md_magic, data, sizeof(md->md_magic)); data += sizeof(md->md_magic); bcopy(md->md_uuid, data, sizeof(md->md_uuid)); data += sizeof(md->md_uuid); bcopy(md->md_name, data, sizeof(md->md_name)); data += sizeof(md->md_name); le32enc(data, md->md_version); data += sizeof(md->md_version); le32enc(data, md->md_sectorsize); data += sizeof(md->md_sectorsize); le64enc(data, md->md_size); data += sizeof(md->md_size); *data = md->md_active_active; } static __inline void multipath_metadata_decode(u_char *data, struct g_multipath_metadata *md) { bcopy(data, md->md_magic, sizeof(md->md_magic)); data += sizeof(md->md_magic); bcopy(data, md->md_uuid, sizeof(md->md_uuid)); data += sizeof(md->md_uuid); bcopy(data, md->md_name, sizeof(md->md_name)); data += sizeof(md->md_name); md->md_version = le32dec(data); data += sizeof(md->md_version); md->md_sectorsize = le32dec(data); data += sizeof(md->md_sectorsize); md->md_size = le64dec(data); data += sizeof(md->md_size); md->md_active_active = *data; } #endif /* _G_MULTIPATH_H_ */
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