1 /*- 2 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _G_LABEL_H_ 30 #define _G_LABEL_H_ 31 32 #include <sys/endian.h> 33 34 #define G_LABEL_CLASS_NAME "LABEL" 35 36 #define G_LABEL_MAGIC "GEOM::LABEL" 37 /* 38 * Version history: 39 * 1 - Initial version number. 40 * 2 - Added md_provsize field to metadata. 41 */ 42 #define G_LABEL_VERSION 2 43 #define G_LABEL_DIR "label" 44 45 #ifdef _KERNEL 46 extern u_int g_label_debug; 47 48 #define G_LABEL_DEBUG(lvl, ...) do { \ 49 if (g_label_debug >= (lvl)) { \ 50 printf("GEOM_LABEL"); \ 51 if (g_label_debug > 0) \ 52 printf("[%u]", lvl); \ 53 printf(": "); \ 54 printf(__VA_ARGS__); \ 55 printf("\n"); \ 56 } \ 57 } while (0) 58 59 typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size); 60 61 struct g_label_desc { 62 g_label_taste_t *ld_taste; 63 char *ld_dir; 64 }; 65 66 /* Supported labels. */ 67 extern const struct g_label_desc g_label_ufs; 68 extern const struct g_label_desc g_label_iso9660; 69 extern const struct g_label_desc g_label_msdosfs; 70 extern const struct g_label_desc g_label_ext2fs; 71 extern const struct g_label_desc g_label_reiserfs; 72 extern const struct g_label_desc g_label_ntfs; 73 #endif /* _KERNEL */ 74 75 struct g_label_metadata { 76 char md_magic[16]; /* Magic value. */ 77 uint32_t md_version; /* Version number. */ 78 char md_label[16]; /* Label. */ 79 uint64_t md_provsize; /* Provider's size. */ 80 }; 81 static __inline void 82 label_metadata_encode(const struct g_label_metadata *md, u_char *data) 83 { 84 85 bcopy(md->md_magic, data, sizeof(md->md_magic)); 86 le32enc(data + 16, md->md_version); 87 bcopy(md->md_label, data + 20, sizeof(md->md_label)); 88 le64enc(data + 36, md->md_provsize); 89 } 90 static __inline void 91 label_metadata_decode(const u_char *data, struct g_label_metadata *md) 92 { 93 94 bcopy(data, md->md_magic, sizeof(md->md_magic)); 95 md->md_version = le32dec(data + 16); 96 bcopy(data + 20, md->md_label, sizeof(md->md_label)); 97 md->md_provsize = le64dec(data + 36); 98 } 99 #endif /* _G_LABEL_H_ */ 100