1 /* 2 * Copyright (C) 2022 Huawei Device Co., Ltd. 3 * Redistribution and use in source and binary forms, with or without 4 * modification, are permitted provided that the following conditions 5 * are met: 6 * 1. Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * 2. Redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in 10 * the documentation and/or other materials provided with the 11 * distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 14 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 19 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 21 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 23 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef MKFS_DEFINE_H 27 #define MKFS_DEFINE_H 28 #include <stdint.h> 29 30 /* 31 * BSD_NPARTS_MIN,BSD_NDRIVEDATA,BSD_NSPARE 32 * Link： https://github.com/freebsd/freebsd-src/ 33 * Path: freebsd-src/sys/sys/disk/bsd.h 34 */ 35 #define BSD_NPARTS_MIN 8 36 37 /* Drive-type specific data size (in number of 32-bit inegrals) */ 38 #define BSD_NDRIVEDATA 5 39 40 /* Number of spare 32-bit integrals following drive-type data */ 41 #define BSD_NSPARE 5 42 43 /* 44 * MAXPHYS 45 * Link： https://github.com/freebsd/freebsd-src/ 46 * Path: freebsd-src/sys/sys/param.h 47 */ 48 #ifdef __ILP32__ 49 #define MAXPHYS (128 * 1024) 50 #else 51 #define MAXPHYS (1024 * 1024) 52 #endif 53 54 /* 55 * DIOCGMEDIASIZE,DIOCGFWSECTORS,DIOCGSECTORSIZE,DIOCGFWHEADS 56 * Link： https://github.com/freebsd/freebsd-src/ 57 * Path: freebsd-src/sys/sys/disk.h 58 */ 59 #define DIOCGMEDIASIZE _IOR('d', 129, off_t) /* Get media size in bytes */ 60 /* 61 * Get the size of the entire device in bytes. This should be a 62 * multiple of the sector size. 63 */ 64 65 #define DIOCGFWSECTORS _IOR('d', 130, u_int) /* Get firmware's sectorcount */ 66 /* 67 * Get the firmware's notion of number of sectors per track. This 68 * value is mostly used for compatibility with various ill designed 69 * disk label formats. Don't use it unless you have to. 70 */ 71 72 #define DIOCGSECTORSIZE _IOR('d', 128, u_int) 73 /* 74 * Get the sector size of the device in bytes. The sector size is the 75 * smallest unit of data which can be transferred from this device. 76 * Usually this is a power of 2 but it might not be (i.e. CDROM audio). 77 */ 78 79 #define DIOCGFWHEADS _IOR('d', 131, u_int) /* Get firmware's headcount */ 80 /* 81 * Get the firmwares notion of number of heads per cylinder. This 82 * value is mostly used for compatibility with various ill designed 83 * disk label formats. Don't use it unless you have to. 84 */ 85 86 /* 87 * FD_GTYPE 88 * Link： https://github.com/freebsd/freebsd-src/ 89 * Path: freebsd-src/sys/sys/fdcio.h 90 */ 91 #ifndef _MACHINE_IOCTL_FD_H_ 92 #define FD_GTYPE _IOR('F', 62, struct fd_type) /* get drive type */ 93 #endif 94 95 /* 96 * disklabel 97 * Link： https://github.com/freebsd/freebsd-src/ 98 * Path: freebsd-src/sys/sys/disk/bsd.h 99 */ 100 struct disklabel { 101 uint32_t d_magic; /* the magic number */ 102 uint16_t d_type; /* drive type */ 103 uint16_t d_subtype; /* controller/d_type specific */ 104 char d_typename[16]; /* type name, e.g. "eagle" */ 105 106 char d_packname[16]; /* pack identifier */ 107 108 /* disk geometry: */ 109 uint32_t d_secsize; /* # of bytes per sector */ 110 uint32_t d_nsectors; /* # of data sectors per track */ 111 uint32_t d_ntracks; /* # of tracks per cylinder */ 112 uint32_t d_ncylinders; /* # of data cylinders per unit */ 113 uint32_t d_secpercyl; /* # of data sectors per cylinder */ 114 uint32_t d_secperunit; /* # of data sectors per unit */ 115 116 /* 117 * Spares (bad sector replacements) below are not counted in 118 * d_nsectors or d_secpercyl. Spare sectors are assumed to 119 * be physical sectors which occupy space at the end of each 120 * track and/or cylinder. 121 */ 122 uint16_t d_sparespertrack; /* # of spare sectors per track */ 123 uint16_t d_sparespercyl; /* # of spare sectors per cylinder */ 124 /* 125 * Alternate cylinders include maintenance, replacement, configuration 126 * description areas, etc. 127 */ 128 uint32_t d_acylinders; /* # of alt. cylinders per unit */ 129 130 /* hardware characteristics: */ 131 /* 132 * d_interleave, d_trackskew and d_cylskew describe perturbations 133 * in the media format used to compensate for a slow controller. 134 * Interleave is physical sector interleave, set up by the 135 * formatter or controller when formatting. When interleaving is 136 * in use, logically adjacent sectors are not physically 137 * contiguous, but instead are separated by some number of 138 * sectors. It is specified as the ratio of physical sectors 139 * traversed per logical sector. Thus an interleave of 1:1 140 * implies contiguous layout, while 2:1 implies that logical 141 * sector 0 is separated by one sector from logical sector 1. 142 * d_trackskew is the offset of sector 0 on track N relative to 143 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 144 * is the offset of sector 0 on cylinder N relative to sector 0 145 * on cylinder N-1. 146 */ 147 uint16_t d_rpm; /* rotational speed */ 148 uint16_t d_interleave; /* hardware sector interleave */ 149 uint16_t d_trackskew; /* sector 0 skew, per track */ 150 uint16_t d_cylskew; /* sector 0 skew, per cylinder */ 151 uint32_t d_headswitch; /* head switch time, usec */ 152 uint32_t d_trkseek; /* track-to-track seek, usec */ 153 uint32_t d_flags; /* generic flags */ 154 uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */ 155 uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */ 156 uint32_t d_magic2; /* the magic number (again) */ 157 uint16_t d_checksum; /* xor of data incl. partitions */ 158 159 /* filesystem and partition information: */ 160 uint16_t d_npartitions; /* number of partitions in following */ 161 uint32_t d_bbsize; /* size of boot area at sn0, bytes */ 162 uint32_t d_sbsize; /* max size of fs superblock, bytes */ 163 struct partition { /* the partition table */ 164 uint32_t p_size; /* number of sectors in partition */ 165 uint32_t p_offset; /* starting sector */ 166 uint32_t p_fsize; /* filesystem basic fragment size */ 167 uint8_t p_fstype; /* filesystem type, see below */ 168 uint8_t p_frag; /* filesystem fragments per block */ 169 uint16_t p_cpg; /* filesystem cylinders per group */ 170 } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */ 171 }; 172 173 /* 174 * fd_type 175 * Link： https://github.com/freebsd/freebsd-src/ 176 * Path： freebsd-src/sys/sys/fdcio.h 177 */ 178 struct fd_type { 179 int sectrac; /* sectors per track */ 180 int secsize; /* size code for sectors */ 181 int datalen; /* data len when secsize = 0 */ 182 int gap; /* gap len between sectors */ 183 int tracks; /* total number of cylinders */ 184 int size; /* size of disk in sectors */ 185 int trans; /* transfer speed code */ 186 int heads; /* number of heads */ 187 int f_gap; /* format gap len */ 188 int f_inter; /* format interleave factor */ 189 int offset_side2; /* offset of sectors on side2 */ 190 int flags; /* misc. features */ 191 #define FL_MFM 0x0001 /* MFM recording */ 192 #define FL_2STEP 0x0002 /* 2 steps between cylinders */ 193 #define FL_PERPND 0x0004 /* perpendicular recording */ 194 #define FL_AUTO 0x0008 /* autodetect format */ 195 }; 196 #endif //MKFS_DEFINE_H