Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h
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1 /* $NetBSD: conf.h,v 1.161 2022/03/28 12:39:18 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)conf.h 8.5 (Berkeley) 1/9/95 37 */ 38 39 #ifndef _SYS_CONF_H_ 40 #define _SYS_CONF_H_ 41 42 /* 43 * Definitions of device driver entry switches 44 */ 45 46 #include <sys/queue.h> 47 #include <sys/device_if.h> 48 49 struct buf; 50 struct knote; 51 struct lwp; 52 struct tty; 53 struct uio; 54 struct vnode; 55 56 /* 57 * Types for d_flag 58 */ 59 #define D_OTHER 0x0000 60 #define D_TAPE 0x0001 61 #define D_DISK 0x0002 62 #define D_TTY 0x0003 63 #define D_TYPEMASK 0x00ff 64 #define D_MPSAFE 0x0100 65 #define D_NEGOFFSAFE 0x0200 66 #define D_UNUSED0 0x0400 /* was D_MCLOSE */ 67 68 /* 69 * Block device switch table 70 */ 71 struct bdevsw { 72 int (*d_open)(dev_t, int, int, struct lwp *); 73 int (*d_cancel)(dev_t, int, int, struct lwp *); 74 int (*d_close)(dev_t, int, int, struct lwp *); 75 void (*d_strategy)(struct buf *); 76 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *); 77 int (*d_dump)(dev_t, daddr_t, void *, size_t); 78 int (*d_psize)(dev_t); 79 int (*d_discard)(dev_t, off_t, off_t); 80 int (*d_devtounit)(dev_t); 81 struct cfdriver *d_cfdriver; 82 int d_flag; 83 }; 84 85 /* 86 * Character device switch table 87 */ 88 struct cdevsw { 89 int (*d_open)(dev_t, int, int, struct lwp *); 90 int (*d_cancel)(dev_t, int, int, struct lwp *); 91 int (*d_close)(dev_t, int, int, struct lwp *); 92 int (*d_read)(dev_t, struct uio *, int); 93 int (*d_write)(dev_t, struct uio *, int); 94 int (*d_ioctl)(dev_t, u_long, void *, int, struct lwp *); 95 void (*d_stop)(struct tty *, int); 96 struct tty * (*d_tty)(dev_t); 97 int (*d_poll)(dev_t, int, struct lwp *); 98 paddr_t (*d_mmap)(dev_t, off_t, int); 99 int (*d_kqfilter)(dev_t, struct knote *); 100 int (*d_discard)(dev_t, off_t, off_t); 101 int (*d_devtounit)(dev_t); 102 struct cfdriver *d_cfdriver; 103 int d_flag; 104 }; 105 106 #ifdef _KERNEL 107 108 #include <sys/mutex.h> 109 extern kmutex_t device_lock; 110 111 int devsw_attach(const char *, const struct bdevsw *, devmajor_t *, 112 const struct cdevsw *, devmajor_t *); 113 void devsw_detach(const struct bdevsw *, const struct cdevsw *); 114 const struct bdevsw *bdevsw_lookup(dev_t); 115 const struct cdevsw *cdevsw_lookup(dev_t); 116 devmajor_t bdevsw_lookup_major(const struct bdevsw *); 117 devmajor_t cdevsw_lookup_major(const struct cdevsw *); 118 119 typedef int dev_open_t(dev_t, int, int, struct lwp *); 120 typedef int dev_cancel_t(dev_t, int, int, struct lwp *); 121 typedef int dev_close_t(dev_t, int, int, struct lwp *); 122 typedef int dev_read_t(dev_t, struct uio *, int); 123 typedef int dev_write_t(dev_t, struct uio *, int); 124 typedef int dev_ioctl_t(dev_t, u_long, void *, int, struct lwp *); 125 typedef void dev_stop_t(struct tty *, int); 126 typedef struct tty *dev_tty_t(dev_t); 127 typedef int dev_poll_t(dev_t, int, struct lwp *); 128 typedef paddr_t dev_mmap_t(dev_t, off_t, int); 129 typedef void dev_strategy_t(struct buf *); 130 typedef int dev_dump_t(dev_t, daddr_t, void *, size_t); 131 typedef int dev_size_t(dev_t); 132 typedef int dev_kqfilter_t(dev_t, struct knote *); 133 typedef int dev_discard_t(dev_t, off_t, off_t); 134 135 #define dev_type_open(n) dev_open_t n 136 #define dev_type_cancel(n) dev_cancel_t n 137 #define dev_type_close(n) dev_close_t n 138 #define dev_type_read(n) dev_read_t n 139 #define dev_type_write(n) dev_write_t n 140 #define dev_type_ioctl(n) dev_ioctl_t n 141 #define dev_type_stop(n) dev_stop_t n 142 #define dev_type_tty(n) dev_tty_t n 143 #define dev_type_poll(n) dev_poll_t n 144 #define dev_type_mmap(n) dev_mmap_t n 145 #define dev_type_strategy(n) dev_strategy_t n 146 #define dev_type_dump(n) dev_dump_t n 147 #define dev_type_size(n) dev_size_t n 148 #define dev_type_kqfilter(n) dev_kqfilter_t n 149 #define dev_type_discard(n) dev_discard_t n 150 151 int devenodev(dev_t, ...); 152 int deveopnotsupp(dev_t, ...); 153 int devnullop(dev_t, ...); 154 int ttyenodev(struct tty *, ...); 155 void ttyvenodev(struct tty *, ...); 156 void ttyvnullop(struct tty *, ...); 157 158 #define noopen ((dev_open_t *)devenodev) 159 #define noclose ((dev_close_t *)devenodev) 160 #define noread ((dev_read_t *)devenodev) 161 #define nowrite ((dev_write_t *)devenodev) 162 #define noioctl ((dev_ioctl_t *)devenodev) 163 #define nostop ((dev_stop_t *)ttyvenodev) 164 #define notty NULL 165 #define nopoll seltrue 166 paddr_t nommap(dev_t, off_t, int); 167 #define nodump ((dev_dump_t *)devenodev) 168 #define nosize NULL 169 #define nokqfilter seltrue_kqfilter 170 #define nodiscard ((dev_discard_t *)devenodev) 171 172 #define nullopen ((dev_open_t *)devnullop) 173 #define nullclose ((dev_close_t *)devnullop) 174 #define nullread ((dev_read_t *)devnullop) 175 #define nullwrite ((dev_write_t *)devnullop) 176 #define nullioctl ((dev_ioctl_t *)devnullop) 177 #define nullstop ((dev_stop_t *)ttyvnullop) 178 #define nullpoll ((dev_poll_t *)devnullop) 179 #define nulldump ((dev_dump_t *)devnullop) 180 #define nullkqfilter ((dev_kqfilter_t *)deveopnotsupp) 181 #define nulldiscard ((dev_discard_t *)devnullop) 182 183 /* device access wrappers. */ 184 185 dev_type_open(bdev_open); 186 dev_type_cancel(bdev_cancel); 187 dev_type_close(bdev_close); 188 dev_type_strategy(bdev_strategy); 189 dev_type_ioctl(bdev_ioctl); 190 dev_type_dump(bdev_dump); 191 dev_type_size(bdev_size); 192 dev_type_discard(bdev_discard); 193 194 void bdev_detached(dev_t); 195 196 dev_type_open(cdev_open); 197 dev_type_cancel(cdev_cancel); 198 dev_type_close(cdev_close); 199 dev_type_read(cdev_read); 200 dev_type_write(cdev_write); 201 dev_type_ioctl(cdev_ioctl); 202 dev_type_stop(cdev_stop); 203 dev_type_tty(cdev_tty); 204 dev_type_poll(cdev_poll); 205 dev_type_mmap(cdev_mmap); 206 dev_type_kqfilter(cdev_kqfilter); 207 dev_type_discard(cdev_discard); 208 209 void cdev_detached(dev_t); 210 211 int cdev_type(dev_t); 212 int cdev_flags(dev_t); 213 int bdev_type(dev_t); 214 int bdev_flags(dev_t); 215 216 /* symbolic sleep message strings */ 217 extern const char devopn[], devio[], devwait[], devin[], devout[]; 218 extern const char devioc[], devcls[]; 219 220 #endif /* _KERNEL */ 221 222 /* 223 * Line discipline switch table 224 */ 225 struct linesw { 226 const char *l_name; /* Linesw name */ 227 228 LIST_ENTRY(linesw) l_list; 229 u_int l_refcnt; /* locked by ttyldisc_list_slock */ 230 int l_no; /* legacy discipline number (for TIOCGETD) */ 231 232 int (*l_open) (dev_t, struct tty *); 233 int (*l_close) (struct tty *, int); 234 int (*l_read) (struct tty *, struct uio *, int); 235 int (*l_write) (struct tty *, struct uio *, int); 236 int (*l_ioctl) (struct tty *, u_long, void *, int, 237 struct lwp *); 238 int (*l_rint) (int, struct tty *); 239 int (*l_start) (struct tty *); 240 int (*l_modem) (struct tty *, int); 241 int (*l_poll) (struct tty *, int, struct lwp *); 242 }; 243 244 #ifdef _KERNEL 245 void ttyldisc_init(void); 246 int ttyldisc_attach(struct linesw *); 247 int ttyldisc_detach(struct linesw *); 248 struct linesw *ttyldisc_lookup(const char *); 249 struct linesw *ttyldisc_lookup_bynum(int); 250 struct linesw *ttyldisc_default(void); 251 void ttyldisc_release(struct linesw *); 252 253 /* For those defining their own line disciplines: */ 254 #define ttynodisc ((int (*)(dev_t, struct tty *))devenodev) 255 #define ttyerrclose ((int (*)(struct tty *, int))ttyenodev) 256 #define ttyerrio ((int (*)(struct tty *, struct uio *, int))ttyenodev) 257 #define ttyerrstart ((int (*)(struct tty *))ttyenodev) 258 259 int ttyerrpoll (struct tty *, int, struct lwp *); 260 int ttynullioctl(struct tty *, u_long, void *, int, struct lwp *); 261 262 int iskmemdev(dev_t); 263 int seltrue_kqfilter(dev_t, struct knote *); 264 #endif 265 266 #ifdef _KERNEL 267 268 #define DEV_MEM 0 /* minor device 0 is physical memory */ 269 #define DEV_KMEM 1 /* minor device 1 is kernel memory */ 270 #define DEV_NULL 2 /* minor device 2 is EOF/rathole */ 271 #ifdef COMPAT_16 272 #define _DEV_ZERO_oARM 3 /* reserved: old ARM /dev/zero minor */ 273 #endif 274 #define DEV_FULL 11 /* minor device 11 is '\0'/ENOSPC */ 275 #define DEV_ZERO 12 /* minor device 12 is '\0'/rathole */ 276 277 enum devnode_class { 278 DEVNODE_DONTBOTHER, 279 DEVNODE_SINGLE, 280 DEVNODE_VECTOR, 281 }; 282 #define DEVNODE_FLAG_LINKZERO 0x01 /* create name -> name0 link */ 283 #define DEVNODE_FLAG_ISMINOR0 0x02 /* vector[0] specifies minor */ 284 #ifdef notyet 285 #define DEVNODE_FLAG_ISMINOR1 0x04 /* vector[1] specifies starting minor */ 286 #endif 287 288 struct devsw_conv { 289 const char *d_name; 290 devmajor_t d_bmajor; 291 devmajor_t d_cmajor; 292 293 /* information about /dev nodes related to the device */ 294 enum devnode_class d_class; 295 int d_flags; 296 int d_vectdim[2]; 297 }; 298 299 void devsw_init(void); 300 const char *devsw_blk2name(devmajor_t); 301 const char *cdevsw_getname(devmajor_t); 302 const char *bdevsw_getname(devmajor_t); 303 devmajor_t devsw_name2blk(const char *, char *, size_t); 304 devmajor_t devsw_name2chr(const char *, char *, size_t); 305 dev_t devsw_chr2blk(dev_t); 306 dev_t devsw_blk2chr(dev_t); 307 int dev_minor_unit(dev_t); 308 309 void mm_init(void); 310 #endif /* _KERNEL */ 311 312 #ifdef _KERNEL 313 void setroot(device_t, int); 314 void rootconf(void); 315 void swapconf(void); 316 #endif /* _KERNEL */ 317 318 #endif /* !_SYS_CONF_H_ */
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