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 macros (internal, non-exported). 35 */ 36 #ifdef _LIBUFS 37 #ifdef _LIBUFS_DEBUGGING 38 /* 39 * Trace steps through libufs, to be used at entry and erroneous return. 40 */ 41 #define ERROR(uufsd, str) \ 42 do { \ 43 fprintf(stderr, "libufs in %s", __func__); \ 44 if (str != NULL) \ 45 fprintf(stderr, ": %s", str); \ 46 if (errno) \ 47 fprintf(stderr, ": %s", strerror(errno)); \ 48 fprintf(stderr, "\n"); \ 49 if ((uufsd) != NULL) \ 50 (uufsd)->d_error = str; \ 51 } while (0) 52 #else /* _LIBUFS_DEBUGGING */ 53 #define ERROR(uufsd, str) \ 54 do { \ 55 if ((uufsd) != NULL) \ 56 (uufsd)->d_error = str; \ 57 } while (0) 58 #endif /* _LIBUFS_DEBUGGING */ 59 #endif /* _LIBUFS */ 60 61 /* 62 * libufs structures. 63 */ 64 65 /* 66 * userland ufs disk. 67 */ 68 struct uufsd { 69 const char *d_name; /* disk name */ 70 int d_ufs; /* decimal UFS version */ 71 int d_fd; /* raw device file descriptor */ 72 long d_bsize; /* device bsize */ 73 ufs2_daddr_t d_sblock; /* superblock location */ 74 struct csum *d_sbcsum; /* Superblock summary info */ 75 caddr_t d_inoblock; /* inode block */ 76 ino_t d_inomin; /* low inode */ 77 ino_t d_inomax; /* high inode */ 78 union { 79 struct fs d_fs; /* filesystem information */ 80 char d_sb[MAXBSIZE]; 81 /* superblock as buffer */ 82 } d_sbunion; 83 union { 84 struct cg d_cg; /* cylinder group */ 85 char d_buf[MAXBSIZE]; 86 /* cylinder group storage */ 87 } d_cgunion; 88 int d_ccg; /* current cylinder group */ 89 int d_lcg; /* last cylinder group (in d_cg) */ 90 const char *d_error; /* human readable disk error */ 91 int d_mine; /* internal flags */ 92 #define d_fs d_sbunion.d_fs 93 #define d_sb d_sbunion.d_sb 94 #define d_cg d_cgunion.d_cg 95 }; 96 97 __BEGIN_DECLS 98 99 /* 100 * libufs prototypes. 101 */ 102 103 /* 104 * block.c 105 */ 106 ssize_t bread(struct uufsd *, ufs2_daddr_t, void *, size_t); 107 ssize_t bwrite(struct uufsd *, ufs2_daddr_t, const void *, size_t); 108 int berase(struct uufsd *, ufs2_daddr_t, ufs2_daddr_t); 109 110 /* 111 * cgroup.c 112 */ 113 ufs2_daddr_t cgballoc(struct uufsd *); 114 int cgbfree(struct uufsd *, ufs2_daddr_t, long); 115 ino_t cgialloc(struct uufsd *); 116 int cgread(struct uufsd *); 117 int cgread1(struct uufsd *, int); 118 int cgwrite(struct uufsd *); 119 int cgwrite1(struct uufsd *, int); 120 121 /* 122 * inode.c 123 */ 124 int getino(struct uufsd *, void **, ino_t, int *); 125 int putino(struct uufsd *); 126 127 /* 128 * sblock.c 129 */ 130 int sbread(struct uufsd *); 131 int sbwrite(struct uufsd *, int); 132 133 /* 134 * type.c 135 */ 136 int ufs_disk_close(struct uufsd *); 137 int ufs_disk_fillout(struct uufsd *, const char *); 138 int ufs_disk_fillout_blank(struct uufsd *, const char *); 139 int ufs_disk_write(struct uufsd *); 140 141 /* 142 * ffs_subr.c 143 */ 144 void ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t); 145 void ffs_clusteracct(struct fs *, struct cg *, ufs1_daddr_t, int); 146 void ffs_fragacct(struct fs *, int, int32_t [], int); 147 int ffs_isblock(struct fs *, u_char *, ufs1_daddr_t); 148 int ffs_isfreeblock(struct fs *, u_char *, ufs1_daddr_t); 149 void ffs_setblock(struct fs *, u_char *, ufs1_daddr_t); 150 151 __END_DECLS 152 153 #endif /* __LIBUFS_H__ */ 154