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 #ifdef _KERNEL 34 #include <sys/sysctl.h> 35 #endif 36 37 #define G_LABEL_CLASS_NAME "LABEL" 38 39 #define G_LABEL_MAGIC "GEOM::LABEL" 40 /* 41 * Version history: 42 * 1 - Initial version number. 43 * 2 - Added md_provsize field to metadata. 44 */ 45 #define G_LABEL_VERSION 2 46 #define G_LABEL_DIR "label" 47 48 #ifdef _KERNEL 49 extern u_int g_label_debug; 50 51 #define G_LABEL_DEBUG(lvl, ...) do { \ 52 if (g_label_debug >= (lvl)) { \ 53 printf("GEOM_LABEL"); \ 54 if (g_label_debug > 0) \ 55 printf("[%u]", lvl); \ 56 printf(": "); \ 57 printf(__VA_ARGS__); \ 58 printf("\n"); \ 59 } \ 60 } while (0) 61 62 SYSCTL_DECL(_kern_geom_label); 63 64 #define G_LABEL_INIT(kind, label, descr) \ 65 SYSCTL_NODE(_kern_geom_label, OID_AUTO, kind, CTLFLAG_RD, \ 66 NULL, ""); \ 67 SYSCTL_INT(_kern_geom_label_##kind, OID_AUTO, enable, \ 68 CTLFLAG_RWTUN, &label.ld_enabled, 1, descr) 69 70 typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size); 71 72 struct g_label_desc { 73 g_label_taste_t *ld_taste; 74 char *ld_dir; 75 int ld_enabled; 76 }; 77 78 /* Supported labels. */ 79 extern struct g_label_desc g_label_ufs_id; 80 extern struct g_label_desc g_label_ufs_volume; 81 extern struct g_label_desc g_label_iso9660; 82 extern struct g_label_desc g_label_msdosfs; 83 extern struct g_label_desc g_label_ext2fs; 84 extern struct g_label_desc g_label_reiserfs; 85 extern struct g_label_desc g_label_ntfs; 86 extern struct g_label_desc g_label_gpt; 87 extern struct g_label_desc g_label_gpt_uuid; 88 extern struct g_label_desc g_label_disk_ident; 89 90 extern void g_label_rtrim(char *label, size_t size); 91 #endif /* _KERNEL */ 92 93 struct g_label_metadata { 94 char md_magic[16]; /* Magic value. */ 95 uint32_t md_version; /* Version number. */ 96 char md_label[16]; /* Label. */ 97 uint64_t md_provsize; /* Provider's size. */ 98 }; 99 static __inline void 100 label_metadata_encode(const struct g_label_metadata *md, u_char *data) 101 { 102 103 bcopy(md->md_magic, data, sizeof(md->md_magic)); 104 le32enc(data + 16, md->md_version); 105 bcopy(md->md_label, data + 20, sizeof(md->md_label)); 106 le64enc(data + 36, md->md_provsize); 107 } 108 static __inline void 109 label_metadata_decode(const u_char *data, struct g_label_metadata *md) 110 { 111 112 bcopy(data, md->md_magic, sizeof(md->md_magic)); 113 md->md_version = le32dec(data + 16); 114 bcopy(data + 20, md->md_label, sizeof(md->md_label)); 115 md->md_provsize = le64dec(data + 36); 116 } 117 #endif /* _G_LABEL_H_ */ 118