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g_label.h
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g_label_msdosfs.h
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Editing: g_label.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2004-2005 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_LABEL_H_ #define _G_LABEL_H_ #include <sys/endian.h> #ifdef _KERNEL #include <sys/sysctl.h> #endif #define G_LABEL_CLASS_NAME "LABEL" #define G_LABEL_MAGIC "GEOM::LABEL" /* * Version history: * 1 - Initial version number. * 2 - Added md_provsize field to metadata. */ #define G_LABEL_VERSION 2 #ifdef _KERNEL extern u_int g_label_debug; #define G_LABEL_DEBUG(lvl, ...) \ _GEOM_DEBUG("GEOM_LABEL", g_label_debug, (lvl), NULL, __VA_ARGS__) SYSCTL_DECL(_kern_geom_label); #define G_LABEL_INIT(kind, label, descr) \ SYSCTL_NODE(_kern_geom_label, OID_AUTO, kind, \ CTLFLAG_RD | CTLFLAG_MPSAFE, \ NULL, ""); \ SYSCTL_INT(_kern_geom_label_##kind, OID_AUTO, enable, \ CTLFLAG_RWTUN, &label.ld_enabled, 1, descr) typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size); struct g_label_desc { g_label_taste_t *ld_taste; char *ld_dirprefix; int ld_enabled; }; /* Supported labels. */ extern struct g_label_desc g_label_ufs_id; extern struct g_label_desc g_label_ufs_volume; extern struct g_label_desc g_label_iso9660; extern struct g_label_desc g_label_msdosfs; extern struct g_label_desc g_label_ext2fs; extern struct g_label_desc g_label_reiserfs; extern struct g_label_desc g_label_ntfs; extern struct g_label_desc g_label_gpt; extern struct g_label_desc g_label_gpt_uuid; extern struct g_label_desc g_label_disk_ident; extern struct g_label_desc g_label_flashmap; extern void g_label_rtrim(char *label, size_t size); #endif /* _KERNEL */ struct g_label_metadata { char md_magic[16]; /* Magic value. */ uint32_t md_version; /* Version number. */ char md_label[16]; /* Label. */ uint64_t md_provsize; /* Provider's size. */ }; static __inline void label_metadata_encode(const struct g_label_metadata *md, u_char *data) { bcopy(md->md_magic, data, sizeof(md->md_magic)); le32enc(data + 16, md->md_version); bcopy(md->md_label, data + 20, sizeof(md->md_label)); le64enc(data + 36, md->md_provsize); } static __inline void label_metadata_decode(const u_char *data, struct g_label_metadata *md) { bcopy(data, md->md_magic, sizeof(md->md_magic)); md->md_version = le32dec(data + 16); bcopy(data + 20, md->md_label, sizeof(md->md_label)); md->md_provsize = le64dec(data + 36); } #endif /* _G_LABEL_H_ */
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