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1c79356b | 1 | /* |
5ba3f43e | 2 | * Copyright (c) 1997-2017 Apple Computer, Inc. All rights reserved. |
5d5c5d0d | 3 | * |
2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
0a7de745 | 5 | * |
2d21ac55 A |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
0a7de745 | 14 | * |
2d21ac55 A |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
0a7de745 | 17 | * |
2d21ac55 A |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
2d21ac55 A |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
0a7de745 | 25 | * |
2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
1c79356b A |
27 | */ |
28 | /* | |
1c79356b A |
29 | * Copyright (c) 1993 NeXT Computer, Inc. |
30 | * | |
31 | * UNIX Device switch tables. | |
32 | * | |
33 | * HISTORY | |
34 | * | |
35 | * 30 July 1997 Umesh Vaishampayan (umeshv@apple.com) | |
0a7de745 | 36 | * enabled file descriptor pseudo-device. |
1c79356b A |
37 | * 18 June 1993 ? at NeXT |
38 | * Cleaned up a lot of stuff in this file. | |
39 | */ | |
40 | ||
41 | #include <sys/param.h> | |
42 | #include <sys/systm.h> | |
1c79356b A |
43 | #include <sys/ioctl.h> |
44 | #include <sys/tty.h> | |
45 | #include <sys/conf.h> | |
46 | ||
91447636 | 47 | /* Prototypes that should be elsewhere: */ |
0a7de745 A |
48 | extern dev_t chrtoblk(dev_t dev); |
49 | extern int chrtoblk_set(int cdev, int bdev); | |
1c79356b | 50 | |
0a7de745 | 51 | struct bdevsw bdevsw[] = |
1c79356b A |
52 | { |
53 | /* | |
0a7de745 | 54 | * For block devices, every other block of 8 slots is |
2d21ac55 | 55 | * reserved for Apple. The other slots are available for |
1c79356b | 56 | * the user. This way we can both add new entries without |
2d21ac55 | 57 | * running into each other. Be sure to fill in Apple's |
1c79356b A |
58 | * 8 reserved slots when you jump over us -- we'll do the |
59 | * same for you. | |
60 | */ | |
61 | ||
2d21ac55 | 62 | /* 0 - 7 are reserved for Apple */ |
1c79356b | 63 | |
0a7de745 A |
64 | NO_BDEVICE, /* 0*/ |
65 | NO_BDEVICE, /* 1*/ | |
66 | NO_BDEVICE, /* 2*/ | |
67 | NO_BDEVICE, /* 3*/ | |
68 | NO_BDEVICE, /* 4*/ | |
69 | NO_BDEVICE, /* 5*/ | |
70 | NO_BDEVICE, /* 6*/ | |
71 | NO_BDEVICE, /* 7*/ | |
1c79356b A |
72 | |
73 | /* 8 - 15 are reserved to the user */ | |
0a7de745 A |
74 | NO_BDEVICE, /* 8*/ |
75 | NO_BDEVICE, /* 9*/ | |
76 | NO_BDEVICE, /*10*/ | |
77 | NO_BDEVICE, /*11*/ | |
78 | NO_BDEVICE, /*12*/ | |
79 | NO_BDEVICE, /*13*/ | |
80 | NO_BDEVICE, /*14*/ | |
81 | NO_BDEVICE, /*15*/ | |
1c79356b | 82 | |
2d21ac55 | 83 | /* 16 - 23 are reserved for Apple */ |
0a7de745 A |
84 | NO_BDEVICE, /*16*/ |
85 | NO_BDEVICE, /*17*/ | |
86 | NO_BDEVICE, /*18*/ | |
87 | NO_BDEVICE, /*18*/ | |
88 | NO_BDEVICE, /*20*/ | |
89 | NO_BDEVICE, /*21*/ | |
90 | NO_BDEVICE, /*22*/ | |
91 | NO_BDEVICE, /*23*/ | |
1c79356b A |
92 | }; |
93 | ||
39037602 | 94 | const int nblkdev = sizeof(bdevsw) / sizeof(bdevsw[0]); |
1c79356b A |
95 | |
96 | extern struct tty *km_tty[]; | |
0a7de745 A |
97 | extern d_open_t cnopen; |
98 | extern d_close_t cnclose; | |
99 | extern d_read_t cnread; | |
100 | extern d_write_t cnwrite; | |
101 | extern d_ioctl_t cnioctl; | |
102 | extern d_select_t cnselect; | |
103 | extern d_open_t kmopen; | |
104 | extern d_close_t kmclose; | |
105 | extern d_read_t kmread; | |
106 | extern d_write_t kmwrite; | |
107 | extern d_ioctl_t kmioctl; | |
108 | extern d_open_t sgopen; | |
109 | extern d_close_t sgclose; | |
110 | extern d_ioctl_t sgioctl; | |
1c79356b A |
111 | |
112 | #if NVOL > 0 | |
0a7de745 A |
113 | extern d_open_t volopen; |
114 | extern d_close_t volclose; | |
115 | extern d_ioctl_t volioctl; | |
1c79356b | 116 | #else |
0a7de745 A |
117 | #define volopen eno_opcl |
118 | #define volclose eno_opcl | |
119 | #define volioctl eno_ioctl | |
1c79356b A |
120 | #endif |
121 | ||
0a7de745 A |
122 | extern d_open_t cttyopen; |
123 | extern d_read_t cttyread; | |
124 | extern d_write_t cttywrite; | |
125 | extern d_ioctl_t cttyioctl; | |
126 | extern d_select_t cttyselect; | |
1c79356b | 127 | |
0a7de745 A |
128 | extern d_read_t mmread; |
129 | extern d_write_t mmwrite; | |
130 | extern d_ioctl_t mmioctl; | |
131 | #define mmselect (select_fcn_t *)seltrue | |
132 | #define mmmmap eno_mmap | |
1c79356b A |
133 | |
134 | #include <pty.h> | |
135 | #if NPTY > 0 | |
0a7de745 A |
136 | extern d_open_t ptsopen; |
137 | extern d_close_t ptsclose; | |
138 | extern d_read_t ptsread; | |
139 | extern d_write_t ptswrite; | |
140 | extern d_stop_t ptsstop; | |
141 | extern d_select_t ptsselect; | |
142 | extern d_open_t ptcopen; | |
143 | extern d_close_t ptcclose; | |
144 | extern d_read_t ptcread; | |
145 | extern d_write_t ptcwrite; | |
146 | extern d_select_t ptcselect; | |
147 | extern d_ioctl_t ptyioctl; | |
1c79356b | 148 | #else |
0a7de745 A |
149 | #define ptsopen eno_opcl |
150 | #define ptsclose eno_opcl | |
151 | #define ptsread eno_rdwrt | |
152 | #define ptswrite eno_rdwrt | |
153 | #define ptsstop nulldev | |
1c79356b | 154 | |
0a7de745 A |
155 | #define ptcopen eno_opcl |
156 | #define ptcclose eno_opcl | |
157 | #define ptcread eno_rdwrt | |
158 | #define ptcwrite eno_rdwrt | |
159 | #define ptcselect eno_select | |
160 | #define ptyioctl eno_ioctl | |
1c79356b A |
161 | #endif |
162 | ||
0a7de745 A |
163 | extern d_open_t logopen; |
164 | extern d_close_t logclose; | |
165 | extern d_read_t logread; | |
166 | extern d_ioctl_t logioctl; | |
167 | extern d_select_t logselect; | |
91447636 | 168 | |
0a7de745 A |
169 | extern d_open_t oslog_streamopen; |
170 | extern d_close_t oslog_streamclose; | |
171 | extern d_read_t oslog_streamread; | |
172 | extern d_ioctl_t oslog_streamioctl; | |
173 | extern d_select_t oslog_streamselect; | |
39037602 | 174 | |
0a7de745 A |
175 | extern d_open_t oslogopen; |
176 | extern d_close_t oslogclose; | |
177 | extern d_select_t oslogselect; | |
178 | extern d_ioctl_t oslogioctl; | |
39037602 | 179 | |
0a7de745 A |
180 | #define nullopen (d_open_t *)&nulldev |
181 | #define nullclose (d_close_t *)&nulldev | |
182 | #define nullread (d_read_t *)&nulldev | |
183 | #define nullwrite (d_write_t *)&nulldev | |
184 | #define nullioctl (d_ioctl_t *)&nulldev | |
185 | #define nullselect (d_select_t *)&nulldev | |
186 | #define nullstop (d_stop_t *)&nulldev | |
187 | #define nullreset (d_reset_t *)&nulldev | |
1c79356b | 188 | |
5ba3f43e | 189 | struct cdevsw cdevsw[] = { |
1c79356b | 190 | /* |
5ba3f43e | 191 | * To add character devices to this table dynamically, use cdevsw_add. |
1c79356b A |
192 | */ |
193 | ||
5ba3f43e A |
194 | [0] = { |
195 | cnopen, cnclose, cnread, cnwrite, | |
196 | cnioctl, nullstop, nullreset, 0, cnselect, | |
197 | eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY | |
198 | }, | |
199 | [1] = NO_CDEVICE, | |
200 | [2] = { | |
201 | cttyopen, nullclose, cttyread, cttywrite, | |
202 | cttyioctl, nullstop, nullreset, 0, cttyselect, | |
203 | eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY | |
204 | }, | |
205 | [3] = { | |
206 | nullopen, nullclose, mmread, mmwrite, | |
207 | mmioctl, nullstop, nullreset, 0, mmselect, | |
208 | mmmmap, eno_strat, eno_getc, eno_putc, D_DISK | |
209 | }, | |
210 | [PTC_MAJOR] = { | |
211 | ptsopen, ptsclose, ptsread, ptswrite, | |
212 | ptyioctl, ptsstop, nullreset, 0, ptsselect, | |
213 | eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY | |
214 | }, | |
215 | [PTS_MAJOR] = { | |
216 | ptcopen, ptcclose, ptcread, ptcwrite, | |
217 | ptyioctl, nullstop, nullreset, 0, ptcselect, | |
218 | eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY | |
219 | }, | |
220 | [6] = { | |
221 | logopen, logclose, logread, eno_rdwrt, | |
222 | logioctl, eno_stop, nullreset, 0, logselect, | |
223 | eno_mmap, eno_strat, eno_getc, eno_putc, 0 | |
224 | }, | |
225 | [7] = { | |
226 | oslogopen, oslogclose, eno_rdwrt, eno_rdwrt, | |
227 | oslogioctl, eno_stop, nullreset, 0, oslogselect, | |
228 | eno_mmap, eno_strat, eno_getc, eno_putc, 0 | |
229 | }, | |
230 | [8] = { | |
231 | oslog_streamopen, oslog_streamclose, oslog_streamread, eno_rdwrt, | |
232 | oslog_streamioctl, eno_stop, nullreset, 0, oslog_streamselect, | |
233 | eno_mmap, eno_strat, eno_getc, eno_putc, 0 | |
234 | }, | |
235 | [9 ... 11] = NO_CDEVICE, | |
236 | [12] = { | |
237 | kmopen, kmclose, kmread, kmwrite, | |
238 | kmioctl, nullstop, nullreset, km_tty, ttselect, | |
239 | eno_mmap, eno_strat, eno_getc, eno_putc, 0 | |
240 | }, | |
cb323159 | 241 | [13 ... 63] = NO_CDEVICE, |
1c79356b | 242 | }; |
39037602 | 243 | const int nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]); |
1c79356b | 244 | |
39037602 | 245 | uint64_t cdevsw_flags[sizeof(cdevsw) / sizeof(cdevsw[0])]; |
1c79356b | 246 | |
0a7de745 | 247 | #include <sys/vnode.h> /* for VCHR and VBLK */ |
1c79356b A |
248 | /* |
249 | * return true if a disk | |
250 | */ | |
251 | int | |
91447636 | 252 | isdisk(dev_t dev, int type) |
1c79356b | 253 | { |
0a7de745 | 254 | dev_t maj = major(dev); |
9bccf70c A |
255 | |
256 | switch (type) { | |
257 | case VCHR: | |
cb323159 | 258 | maj = chrtoblk(dev); |
9bccf70c A |
259 | if (maj == NODEV) { |
260 | break; | |
261 | } | |
0a7de745 | 262 | /* FALL THROUGH */ |
9bccf70c | 263 | case VBLK: |
39236c6e | 264 | if (bdevsw[maj].d_type == D_DISK) { |
0a7de745 | 265 | return 1; |
9bccf70c | 266 | } |
1c79356b A |
267 | break; |
268 | } | |
0a7de745 | 269 | return 0; |
1c79356b A |
270 | } |
271 | ||
cb323159 | 272 | static int chrtoblktab[] = {[0 ... nchrdev] = NODEV }; |
1c79356b A |
273 | |
274 | /* | |
275 | * convert chr dev to blk dev | |
276 | */ | |
277 | dev_t | |
91447636 | 278 | chrtoblk(dev_t dev) |
1c79356b A |
279 | { |
280 | int blkmaj; | |
281 | ||
0a7de745 A |
282 | if (major(dev) >= nchrdev) { |
283 | return NODEV; | |
284 | } | |
1c79356b | 285 | blkmaj = chrtoblktab[major(dev)]; |
0a7de745 A |
286 | if (blkmaj == NODEV) { |
287 | return NODEV; | |
288 | } | |
289 | return makedev(blkmaj, minor(dev)); | |
1c79356b A |
290 | } |
291 | ||
9bccf70c A |
292 | int |
293 | chrtoblk_set(int cdev, int bdev) | |
294 | { | |
0a7de745 A |
295 | if (cdev >= nchrdev) { |
296 | return -1; | |
297 | } | |
298 | if (bdev != NODEV && bdev >= nblkdev) { | |
299 | return -1; | |
300 | } | |
9bccf70c A |
301 | chrtoblktab[cdev] = bdev; |
302 | return 0; | |
303 | } |