1 /* 2 * Copyright (c) 2002 Juli Mallett. All rights reserved. 3 * 4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the 5 * FreeBSD project. Redistribution and use in source and binary forms, with 6 * or without modification, are permitted provided that the following 7 * conditions are met: 8 * 9 * 1. Redistribution of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 2. Redistribution in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef __LIBUFS_H__ 31 #define __LIBUFS_H__ 32 33 /* 34 * libufs structures. 35 */ 36 37 /* 38 * userland ufs disk. 39 */ 40 struct uufsd { 41 const char *d_name; /* disk name */ 42 int d_ufs; /* decimal UFS version */ 43 int d_fd; /* raw device file descriptor */ 44 long d_bsize; /* device bsize */ 45 ufs2_daddr_t d_sblock; /* superblock location */ 46 struct csum *d_sbcsum; /* Superblock summary info */ 47 caddr_t d_inoblock; /* inode block */ 48 ino_t d_inomin; /* low inode */ 49 ino_t d_inomax; /* high inode */ 50 union { 51 struct fs d_fs; /* filesystem information */ 52 char d_sb[MAXBSIZE]; 53 /* superblock as buffer */ 54 } d_sbunion; 55 union { 56 struct cg d_cg; /* cylinder group */ 57 char d_buf[MAXBSIZE]; 58 /* cylinder group storage */ 59 } d_cgunion; 60 int d_ccg; /* current cylinder group */ 61 int d_lcg; /* last cylinder group (in d_cg) */ 62 const char *d_error; /* human readable disk error */ 63 int d_mine; /* internal flags */ 64 #define d_fs d_sbunion.d_fs 65 #define d_sb d_sbunion.d_sb 66 #define d_cg d_cgunion.d_cg 67 }; 68 69 /* 70 * libufs macros (internal, non-exported). 71 */ 72 #ifdef _LIBUFS 73 /* 74 * Trace steps through libufs, to be used at entry and erroneous return. 75 */ 76 static inline void 77 ERROR(struct uufsd *u, const char *str) 78 { 79 80 #ifdef _LIBUFS_DEBUGGING 81 if (str != NULL) { 82 fprintf(stderr, "libufs: %s", str); 83 if (errno != 0) 84 fprintf(stderr, ": %s", strerror(errno)); 85 fprintf(stderr, "\n"); 86 } 87 #endif 88 if (u != NULL) 89 u->d_error = str; 90 } 91 #endif /* _LIBUFS */ 92 93 __BEGIN_DECLS 94 95 /* 96 * libufs prototypes. 97 */ 98 99 /* 100 * block.c 101 */ 102 ssize_t bread(struct uufsd *, ufs2_daddr_t, void *, size_t); 103 ssize_t bwrite(struct uufsd *, ufs2_daddr_t, const void *, size_t); 104 int berase(struct uufsd *, ufs2_daddr_t, ufs2_daddr_t); 105 106 /* 107 * cgroup.c 108 */ 109 ufs2_daddr_t cgballoc(struct uufsd *); 110 int cgbfree(struct uufsd *, ufs2_daddr_t, long); 111 ino_t cgialloc(struct uufsd *); 112 int cgread(struct uufsd *); 113 int cgread1(struct uufsd *, int); 114 int cgwrite(struct uufsd *); 115 int cgwrite1(struct uufsd *, int); 116 117 /* 118 * inode.c 119 */ 120 int getino(struct uufsd *, void **, ino_t, int *); 121 int putino(struct uufsd *); 122 123 /* 124 * sblock.c 125 */ 126 int sbread(struct uufsd *); 127 int sbwrite(struct uufsd *, int); 128 129 /* 130 * type.c 131 */ 132 int ufs_disk_close(struct uufsd *); 133 int ufs_disk_fillout(struct uufsd *, const char *); 134 int ufs_disk_fillout_blank(struct uufsd *, const char *); 135 int ufs_disk_write(struct uufsd *); 136 137 /* 138 * ffs_subr.c 139 */ 140 void ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t); 141 void ffs_clusteracct(struct fs *, struct cg *, ufs1_daddr_t, int); 142 void ffs_fragacct(struct fs *, int, int32_t [], int); 143 int ffs_isblock(struct fs *, u_char *, ufs1_daddr_t); 144 int ffs_isfreeblock(struct fs *, u_char *, ufs1_daddr_t); 145 void ffs_setblock(struct fs *, u_char *, ufs1_daddr_t); 146 147 __END_DECLS 148 149 #endif /* __LIBUFS_H__ */ 150