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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 | /* * Copyright (c) 1997-2020 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1993 NeXT Computer, Inc. * * UNIX Device switch tables. * * HISTORY * * 30 July 1997 Umesh Vaishampayan (umeshv@apple.com) * enabled file descriptor pseudo-device. * 18 June 1993 ? at NeXT * Cleaned up a lot of stuff in this file. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/ioctl.h> #include <sys/tty.h> #include <sys/conf.h> /* Prototypes that should be elsewhere: */ extern dev_t chrtoblk(dev_t dev); extern int chrtoblk_set(int cdev, int bdev); struct bdevsw bdevsw[] = { /* * For block devices, every other block of 8 slots is * reserved for Apple. The other slots are available for * the user. This way we can both add new entries without * running into each other. Be sure to fill in Apple's * 8 reserved slots when you jump over us -- we'll do the * same for you. */ /* 0 - 7 are reserved for Apple */ NO_BDEVICE, /* 0*/ NO_BDEVICE, /* 1*/ NO_BDEVICE, /* 2*/ NO_BDEVICE, /* 3*/ NO_BDEVICE, /* 4*/ NO_BDEVICE, /* 5*/ NO_BDEVICE, /* 6*/ NO_BDEVICE, /* 7*/ /* 8 - 15 are reserved to the user */ NO_BDEVICE, /* 8*/ NO_BDEVICE, /* 9*/ NO_BDEVICE, /*10*/ NO_BDEVICE, /*11*/ NO_BDEVICE, /*12*/ NO_BDEVICE, /*13*/ NO_BDEVICE, /*14*/ NO_BDEVICE, /*15*/ /* 16 - 23 are reserved for Apple */ NO_BDEVICE, /*16*/ NO_BDEVICE, /*17*/ NO_BDEVICE, /*18*/ NO_BDEVICE, /*18*/ NO_BDEVICE, /*20*/ NO_BDEVICE, /*21*/ NO_BDEVICE, /*22*/ NO_BDEVICE, /*23*/ }; const int nblkdev = sizeof(bdevsw) / sizeof(bdevsw[0]); extern struct tty *km_tty[]; extern d_open_t cnopen; extern d_close_t cnclose; extern d_read_t cnread; extern d_write_t cnwrite; extern d_ioctl_t cnioctl; extern d_select_t cnselect; extern d_open_t kmopen; extern d_close_t kmclose; extern d_read_t kmread; extern d_write_t kmwrite; extern d_ioctl_t kmioctl; extern d_open_t sgopen; extern d_close_t sgclose; extern d_ioctl_t sgioctl; #if NVOL > 0 extern d_open_t volopen; extern d_close_t volclose; extern d_ioctl_t volioctl; #else #define volopen eno_opcl #define volclose eno_opcl #define volioctl eno_ioctl #endif extern d_open_t cttyopen; extern d_read_t cttyread; extern d_write_t cttywrite; extern d_ioctl_t cttyioctl; extern d_select_t cttyselect; extern d_read_t mmread; extern d_write_t mmwrite; extern d_ioctl_t mmioctl; #define mmselect (select_fcn_t *)(void (*)(void))seltrue #define mmmmap eno_mmap #include <pty.h> #if NPTY > 0 extern d_open_t ptsopen; extern d_close_t ptsclose; extern d_read_t ptsread; extern d_write_t ptswrite; extern d_stop_t ptsstop; extern d_select_t ptsselect; extern d_open_t ptcopen; extern d_close_t ptcclose; extern d_read_t ptcread; extern d_write_t ptcwrite; extern d_select_t ptcselect; extern d_ioctl_t ptyioctl; #else #define ptsopen eno_opcl #define ptsclose eno_opcl #define ptsread eno_rdwrt #define ptswrite eno_rdwrt #define ptsstop nulldev #define ptcopen eno_opcl #define ptcclose eno_opcl #define ptcread eno_rdwrt #define ptcwrite eno_rdwrt #define ptcselect eno_select #define ptyioctl eno_ioctl #endif extern d_open_t logopen; extern d_close_t logclose; extern d_read_t logread; extern d_ioctl_t logioctl; extern d_select_t logselect; extern d_open_t oslog_streamopen; extern d_close_t oslog_streamclose; extern d_read_t oslog_streamread; extern d_ioctl_t oslog_streamioctl; extern d_select_t oslog_streamselect; extern d_open_t oslogopen; extern d_close_t oslogclose; extern d_select_t oslogselect; extern d_ioctl_t oslogioctl; #define nulldevfp (void (*)(void))&nulldev #define nullopen (d_open_t *)nulldevfp #define nullclose (d_close_t *)nulldevfp #define nullread (d_read_t *)nulldevfp #define nullwrite (d_write_t *)nulldevfp #define nullioctl (d_ioctl_t *)nulldevfp #define nullselect (d_select_t *)nulldevfp #define nullstop (d_stop_t *)nulldevfp #define nullreset (d_reset_t *)nulldevfp struct cdevsw cdevsw[] = { /* * To add character devices to this table dynamically, use cdevsw_add. */ [0] = { cnopen, cnclose, cnread, cnwrite, cnioctl, nullstop, nullreset, 0, cnselect, eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY }, [1] = NO_CDEVICE, [2] = { cttyopen, nullclose, cttyread, cttywrite, cttyioctl, nullstop, nullreset, 0, cttyselect, eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY }, [3] = { nullopen, nullclose, mmread, mmwrite, mmioctl, nullstop, nullreset, 0, mmselect, mmmmap, eno_strat, eno_getc, eno_putc, D_DISK }, [PTC_MAJOR] = { ptsopen, ptsclose, ptsread, ptswrite, ptyioctl, ptsstop, nullreset, 0, ptsselect, eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY }, [PTS_MAJOR] = { ptcopen, ptcclose, ptcread, ptcwrite, ptyioctl, nullstop, nullreset, 0, ptcselect, eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY }, [6] = { logopen, logclose, logread, eno_rdwrt, logioctl, eno_stop, nullreset, 0, logselect, eno_mmap, eno_strat, eno_getc, eno_putc, 0 }, [7] = { oslogopen, oslogclose, eno_rdwrt, eno_rdwrt, oslogioctl, eno_stop, nullreset, 0, oslogselect, eno_mmap, eno_strat, eno_getc, eno_putc, 0 }, [8] = { oslog_streamopen, oslog_streamclose, oslog_streamread, eno_rdwrt, oslog_streamioctl, eno_stop, nullreset, 0, oslog_streamselect, eno_mmap, eno_strat, eno_getc, eno_putc, 0 }, [9 ... 11] = NO_CDEVICE, [12] = { kmopen, kmclose, kmread, kmwrite, kmioctl, nullstop, nullreset, km_tty, ttselect, eno_mmap, eno_strat, eno_getc, eno_putc, 0 }, [13 ... 63] = NO_CDEVICE, }; const int nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]); uint64_t cdevsw_flags[sizeof(cdevsw) / sizeof(cdevsw[0])]; #include <sys/vnode.h> /* for VCHR and VBLK */ /* * return true if a disk */ int isdisk(dev_t dev, int type) { dev_t maj = major(dev); switch (type) { case VCHR: maj = chrtoblk(dev); if (maj == NODEV) { break; } OS_FALLTHROUGH; case VBLK: if (bdevsw[maj].d_type == D_DISK) { return 1; } break; } return 0; } static int chrtoblktab[] = {[0 ... nchrdev] = NODEV }; /* * convert chr dev to blk dev */ dev_t chrtoblk(dev_t dev) { int blkmaj; if (major(dev) >= nchrdev) { return NODEV; } blkmaj = chrtoblktab[major(dev)]; if (blkmaj == NODEV) { return NODEV; } return makedev(blkmaj, minor(dev)); } int chrtoblk_set(int cdev, int bdev) { if (cdev >= nchrdev) { return -1; } if (bdev != NODEV && bdev >= nblkdev) { return -1; } chrtoblktab[cdev] = bdev; return 0; } |