1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)conf.h 8.5 (Berkeley) 1/9/95 39 * $FreeBSD: src/sys/sys/conf.h,v 1.103.2.6 2002/03/11 01:14:55 dd Exp $ 40 * $DragonFly: src/sys/sys/conf.h,v 1.5 2003/07/22 17:03:34 dillon Exp $ 41 */ 42 43 #ifndef _SYS_CONF_H_ 44 #define _SYS_CONF_H_ 45 46 #include <sys/queue.h> 47 48 #define SPECNAMELEN 15 49 50 struct tty; 51 struct disk; 52 struct vnode; 53 54 struct specinfo { 55 u_int si_flags; 56 udev_t si_udev; 57 LIST_ENTRY(specinfo) si_hash; 58 SLIST_HEAD(, vnode) si_hlist; 59 char si_name[SPECNAMELEN + 1]; 60 void *si_drv1; 61 void *si_drv2; 62 struct cdevsw *si_devsw; /* cached */ 63 int si_iosize_max; /* maximum I/O size (for physio &al) */ 64 union { 65 struct { 66 struct tty *__sit_tty; 67 } __si_tty; 68 struct { 69 struct disk *__sid_disk; 70 struct mount *__sid_mountpoint; 71 int __sid_bsize_phys; /* min physical block size */ 72 int __sid_bsize_best; /* optimal block size */ 73 } __si_disk; 74 } __si_u; 75 }; 76 77 #define SI_STASHED 0x0001 /* created in stashed storage */ 78 79 #define si_tty __si_u.__si_tty.__sit_tty 80 #define si_disk __si_u.__si_disk.__sid_disk 81 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint 82 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 83 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best 84 85 /* 86 * Exported shorthand 87 */ 88 #define v_hashchain v_rdev->si_hlist 89 #define v_specmountpoint v_rdev->si_mountpoint 90 91 /* 92 * Special device management 93 */ 94 #define SPECHSZ 64 95 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 96 97 /* 98 * Definitions of device driver entry switches 99 */ 100 101 struct buf; 102 struct proc; 103 struct uio; 104 struct knote; 105 106 /* 107 * Note: d_thread_t is provided as a transition aid for those drivers 108 * that treat struct proc/struct thread as an opaque data type and 109 * exist in substantially the same form in both 4.x and 5.x. Writers 110 * of drivers that dips into the d_thread_t structure should use 111 * struct thread or struct proc as appropriate for the version of the 112 * OS they are using. It is provided in lieu of each device driver 113 * inventing its own way of doing this. While it does violate style(9) 114 * in a number of ways, this violation is deemed to be less 115 * important than the benefits that a uniform API between releases 116 * gives. 117 * 118 * Users of struct thread/struct proc that aren't device drivers should 119 * not use d_thread_t. 120 */ 121 122 struct thread; 123 struct lwkt_port; 124 125 typedef struct thread d_thread_t; 126 typedef int d_open_t (dev_t dev, int oflags, int devtype, d_thread_t *td); 127 typedef int d_close_t (dev_t dev, int fflag, int devtype, d_thread_t *td); 128 typedef void d_strategy_t (struct buf *bp); 129 typedef int d_ioctl_t (dev_t dev, u_long cmd, caddr_t data, 130 int fflag, d_thread_t *td); 131 typedef int d_dump_t (dev_t dev); 132 typedef int d_psize_t (dev_t dev); 133 134 typedef int d_read_t (dev_t dev, struct uio *uio, int ioflag); 135 typedef int d_write_t (dev_t dev, struct uio *uio, int ioflag); 136 typedef int d_poll_t (dev_t dev, int events, d_thread_t *td); 137 typedef int d_kqfilter_t (dev_t dev, struct knote *kn); 138 typedef int d_mmap_t (dev_t dev, vm_offset_t offset, int nprot); 139 140 typedef int l_open_t (dev_t dev, struct tty *tp); 141 typedef int l_close_t (struct tty *tp, int flag); 142 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag); 143 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag); 144 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, 145 int flag, d_thread_t *td); 146 typedef int l_rint_t (int c, struct tty *tp); 147 typedef int l_start_t (struct tty *tp); 148 typedef int l_modem_t (struct tty *tp, int flag); 149 150 /* 151 * XXX: The dummy argument can be used to do what strategy1() never 152 * did anywhere: Create a per device flag to lock the device during 153 * label/slice surgery, all calls with a dummy == 0 gets stalled on 154 * a queue somewhere, whereas dummy == 1 are let through. Once out 155 * of surgery, reset the flag and restart all the stuff on the stall 156 * queue. 157 */ 158 #define BUF_STRATEGY(bp, dummy) dev_dstrategy((bp)->b_dev, bp) 159 /* 160 * Types for d_flags. 161 */ 162 #define D_TAPE 0x0001 163 #define D_DISK 0x0002 164 #define D_TTY 0x0004 165 #define D_MEM 0x0008 166 167 #define D_TYPEMASK 0xffff 168 169 /* 170 * Flags for d_flags. 171 */ 172 #define D_MEMDISK 0x00010000 /* memory type disk */ 173 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 174 #define D_CANFREE 0x00040000 /* can free blocks */ 175 #define D_TRACKCLOSE 0x00080000 /* track all closes */ 176 #define D_MASTER 0x00100000 /* used by pty/tty code */ 177 #define D_KQFILTER 0x00200000 /* has kqfilter entry */ 178 179 /* 180 * Character device switch table 181 */ 182 struct cdevsw { 183 const char *d_name; /* base device name, e.g. 'vn' */ 184 int d_maj; /* major (char) device number */ 185 u_int d_flags; /* D_ flags */ 186 struct lwkt_port *d_port; /* port (template only) */ 187 u_int d_autoq; /* thread safe (old style) vec mask */ 188 189 /* 190 * Old style vectors are used only if d_port is NULL when the cdevsw 191 * is added to the system. They have been renamed to prevent misuse. 192 */ 193 d_open_t *old_open; 194 d_close_t *old_close; 195 d_read_t *old_read; 196 d_write_t *old_write; 197 d_ioctl_t *old_ioctl; 198 d_poll_t *old_poll; 199 d_mmap_t *old_mmap; 200 d_strategy_t *old_strategy; 201 d_dump_t *old_dump; 202 d_psize_t *old_psize; 203 d_kqfilter_t *old_kqfilter; 204 }; 205 206 /* 207 * Line discipline switch table 208 */ 209 struct linesw { 210 l_open_t *l_open; 211 l_close_t *l_close; 212 l_read_t *l_read; 213 l_write_t *l_write; 214 l_ioctl_t *l_ioctl; 215 l_rint_t *l_rint; 216 l_start_t *l_start; 217 l_modem_t *l_modem; 218 u_char l_hotchar; 219 }; 220 221 #ifdef _KERNEL 222 extern struct linesw linesw[]; 223 extern int nlinesw; 224 225 int ldisc_register (int , struct linesw *); 226 void ldisc_deregister (int); 227 #define LDISC_LOAD -1 /* Loadable line discipline */ 228 #endif 229 230 /* 231 * Swap device table 232 */ 233 struct swdevt { 234 udev_t sw_dev; /* For quasibogus swapdev reporting */ 235 int sw_flags; 236 int sw_nblks; 237 struct vnode *sw_vp; 238 dev_t sw_device; 239 }; 240 #define SW_FREED 0x01 241 #define SW_SEQUENTIAL 0x02 242 #define sw_freed sw_flags /* XXX compat */ 243 244 #ifdef _KERNEL 245 d_open_t noopen; 246 d_close_t noclose; 247 d_read_t noread; 248 d_write_t nowrite; 249 d_ioctl_t noioctl; 250 d_mmap_t nommap; 251 d_kqfilter_t nokqfilter; 252 #define nostrategy ((d_strategy_t *)NULL) 253 #define nopoll seltrue 254 255 d_dump_t nodump; 256 257 #define NUMCDEVSW 256 258 259 /* 260 * nopsize is little used, so not worth having dummy functions for. 261 */ 262 #define nopsize ((d_psize_t *)NULL) 263 264 d_open_t nullopen; 265 d_close_t nullclose; 266 267 l_ioctl_t l_nullioctl; 268 l_read_t l_noread; 269 l_write_t l_nowrite; 270 271 struct module; 272 273 struct devsw_module_data { 274 int (*chainevh)(struct module *, int, void *); /* next handler */ 275 void *chainarg; /* arg for next event handler */ 276 /* Do not initialize fields hereafter */ 277 }; 278 279 #define DEV_MODULE(name, evh, arg) \ 280 static moduledata_t name##_mod = { \ 281 #name, \ 282 evh, \ 283 arg \ 284 }; \ 285 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 286 287 void compile_devsw(struct cdevsw *devsw); 288 int cdevsw_add (struct cdevsw *new); 289 struct lwkt_port *cdevsw_add_override (struct cdevsw *new, struct lwkt_port *port); 290 struct lwkt_port *cdevsw_dev_override(dev_t dev, struct lwkt_port *port); 291 292 int cdevsw_remove (struct cdevsw *old); 293 int count_dev (dev_t dev); 294 void destroy_dev (dev_t dev); 295 struct cdevsw *devsw (dev_t dev); 296 const char *devtoname (dev_t dev); 297 void freedev (dev_t dev); 298 int iszerodev (dev_t dev); 299 dev_t make_dev (struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...) __printflike(6, 7); 300 int lminor (dev_t dev); 301 void setconf (void); 302 dev_t getdiskbyname(char *name); 303 304 /* 305 * XXX: This included for when DEVFS resurfaces 306 */ 307 308 #define UID_ROOT 0 309 #define UID_BIN 3 310 #define UID_UUCP 66 311 312 #define GID_WHEEL 0 313 #define GID_KMEM 2 314 #define GID_OPERATOR 5 315 #define GID_BIN 7 316 #define GID_GAMES 13 317 #define GID_DIALER 68 318 319 #endif /* _KERNEL */ 320 321 #endif /* !_SYS_CONF_H_ */ 322