1 /*- 2 * Copyright (c) 2004 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 #define G_LABEL_VERSION 0 38 #define G_LABEL_DIR "label" 39 40 #ifdef _KERNEL 41 extern u_int g_label_debug; 42 43 #define G_LABEL_DEBUG(lvl, ...) do { \ 44 if (g_label_debug >= (lvl)) { \ 45 printf("GEOM_LABEL"); \ 46 if (g_label_debug > 0) \ 47 printf("[%u]", lvl); \ 48 printf(": "); \ 49 printf(__VA_ARGS__); \ 50 printf("\n"); \ 51 } \ 52 } while (0) 53 #define G_LABEL_LOGREQ(bp, ...) do { \ 54 if (g_label_debug >= 2) { \ 55 printf("GEOM_LABEL[2]: "); \ 56 printf(__VA_ARGS__); \ 57 printf(" "); \ 58 g_print_bio(bp); \ 59 printf("\n"); \ 60 } \ 61 } while (0) 62 63 typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size); 64 65 struct g_label_desc { 66 g_label_taste_t *ld_taste; 67 char *ld_dir; 68 }; 69 70 /* Supported labels. */ 71 extern const struct g_label_desc g_label_ufs; 72 extern const struct g_label_desc g_label_iso9660; 73 extern const struct g_label_desc g_label_msdosfs; 74 #endif /* _KERNEL */ 75 76 struct g_label_metadata { 77 char md_magic[16]; /* Magic value. */ 78 uint32_t md_version; /* Version number. */ 79 char md_label[16]; /* Label. */ 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 } 89 static __inline void 90 label_metadata_decode(const u_char *data, struct g_label_metadata *md) 91 { 92 93 bcopy(data, md->md_magic, sizeof(md->md_magic)); 94 md->md_version = le32dec(data + 16); 95 bcopy(data + 20, md->md_label, sizeof(md->md_label)); 96 } 97 #endif /* _G_LABEL_H_ */ 98