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 1.8 2004/07/04 05:16:32 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 struct lwkt_port; 54 55 struct specinfo { 56 u_int si_flags; 57 udev_t si_udev; 58 LIST_ENTRY(specinfo) si_hash; 59 SLIST_HEAD(, vnode) si_hlist; 60 char si_name[SPECNAMELEN + 1]; 61 void *si_drv1; 62 void *si_drv2; 63 struct cdevsw *si_devsw; /* direct device switch */ 64 struct lwkt_port *si_port; /* direct port dispatch */ 65 int si_iosize_max; /* maximum I/O size (for physio &al) */ 66 int si_refs; 67 union { 68 struct { 69 struct tty *__sit_tty; 70 } __si_tty; 71 struct { 72 struct disk *__sid_disk; 73 struct mount *__sid_mountpoint; 74 int __sid_bsize_phys; /* min physical block size */ 75 int __sid_bsize_best; /* optimal block size */ 76 } __si_disk; 77 } __si_u; 78 }; 79 80 #define SI_STASHED 0x0001 /* created in stashed storage */ 81 #define SI_HASHED 0x0002 /* in (maj,min) hash table */ 82 #define SI_ADHOC 0x0004 /* created via make_adhoc_dev() or udev2dev() */ 83 84 #define si_tty __si_u.__si_tty.__sit_tty 85 #define si_disk __si_u.__si_disk.__sid_disk 86 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint 87 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys 88 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best 89 90 #define CDEVSW_ALL_MINORS 0 /* mask of 0 always matches 0 */ 91 92 /* 93 * Special device management 94 */ 95 #define SPECHSZ 64 96 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ) 97 98 /* 99 * Definitions of device driver entry switches 100 */ 101 102 struct buf; 103 struct proc; 104 struct uio; 105 struct knote; 106 107 /* 108 * Note: d_thread_t is provided as a transition aid for those drivers 109 * that treat struct proc/struct thread as an opaque data type and 110 * exist in substantially the same form in both 4.x and 5.x. Writers 111 * of drivers that dips into the d_thread_t structure should use 112 * struct thread or struct proc as appropriate for the version of the 113 * OS they are using. It is provided in lieu of each device driver 114 * inventing its own way of doing this. While it does violate style(9) 115 * in a number of ways, this violation is deemed to be less 116 * important than the benefits that a uniform API between releases 117 * gives. 118 * 119 * Users of struct thread/struct proc that aren't device drivers should 120 * not use d_thread_t. 121 */ 122 123 struct thread; 124 struct lwkt_port; 125 126 typedef struct thread d_thread_t; 127 typedef int d_clone_t (dev_t dev); 128 typedef int d_open_t (dev_t dev, int oflags, int devtype, d_thread_t *td); 129 typedef int d_close_t (dev_t dev, int fflag, int devtype, d_thread_t *td); 130 typedef void d_strategy_t (struct buf *bp); 131 typedef int d_ioctl_t (dev_t dev, u_long cmd, caddr_t data, 132 int fflag, d_thread_t *td); 133 typedef int d_dump_t (dev_t dev, u_int count, u_int blkno, u_int secsize); 134 typedef int d_psize_t (dev_t dev); 135 136 typedef int d_read_t (dev_t dev, struct uio *uio, int ioflag); 137 typedef int d_write_t (dev_t dev, struct uio *uio, int ioflag); 138 typedef int d_poll_t (dev_t dev, int events, d_thread_t *td); 139 typedef int d_kqfilter_t (dev_t dev, struct knote *kn); 140 typedef int d_mmap_t (dev_t dev, vm_offset_t offset, int nprot); 141 142 typedef int l_open_t (dev_t dev, struct tty *tp); 143 typedef int l_close_t (struct tty *tp, int flag); 144 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag); 145 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag); 146 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data, 147 int flag, d_thread_t *td); 148 typedef int l_rint_t (int c, struct tty *tp); 149 typedef int l_start_t (struct tty *tp); 150 typedef int l_modem_t (struct tty *tp, int flag); 151 152 /* 153 * XXX: The dummy argument can be used to do what strategy1() never 154 * did anywhere: Create a per device flag to lock the device during 155 * label/slice surgery, all calls with a dummy == 0 gets stalled on 156 * a queue somewhere, whereas dummy == 1 are let through. Once out 157 * of surgery, reset the flag and restart all the stuff on the stall 158 * queue. 159 */ 160 #define BUF_STRATEGY(bp, dummy) dev_dstrategy((bp)->b_dev, bp) 161 /* 162 * Types for d_flags. 163 */ 164 #define D_TAPE 0x0001 165 #define D_DISK 0x0002 166 #define D_TTY 0x0004 167 #define D_MEM 0x0008 168 169 #define D_TYPEMASK 0xffff 170 171 /* 172 * Flags for d_flags. 173 */ 174 #define D_MEMDISK 0x00010000 /* memory type disk */ 175 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */ 176 #define D_CANFREE 0x00040000 /* can free blocks */ 177 #define D_TRACKCLOSE 0x00080000 /* track all closes */ 178 #define D_MASTER 0x00100000 /* used by pty/tty code */ 179 #define D_KQFILTER 0x00200000 /* has kqfilter entry */ 180 181 /* 182 * Character device switch table. 183 * 184 * NOTE: positions are hard coded for static structure initialization. 185 */ 186 struct cdevsw { 187 const char *d_name; /* base device name, e.g. 'vn' */ 188 int d_maj; /* major (char) device number */ 189 u_int d_flags; /* D_ flags */ 190 struct lwkt_port *d_port; /* port (template only) */ 191 d_clone_t *d_clone; /* clone from base cdevsw */ 192 193 /* 194 * Old style vectors are used only if d_port is NULL when the cdevsw 195 * is added to the system. They have been renamed to prevent misuse. 196 */ 197 d_open_t *old_open; 198 d_close_t *old_close; 199 d_read_t *old_read; 200 d_write_t *old_write; 201 d_ioctl_t *old_ioctl; 202 d_poll_t *old_poll; 203 d_mmap_t *old_mmap; 204 d_strategy_t *old_strategy; 205 d_dump_t *old_dump; 206 d_psize_t *old_psize; 207 d_kqfilter_t *old_kqfilter; 208 void (*old_dummy1)(void); /* expansion space */ 209 void (*old_dummy2)(void); 210 void (*old_dummy3)(void); 211 void (*old_dummy4)(void); 212 int d_refs; /* ref count */ 213 void *d_data; /* custom driver data */ 214 }; 215 216 struct cdevlink { 217 struct cdevlink *next; 218 u_int mask; 219 u_int match; 220 struct cdevsw *devsw; 221 }; 222 223 /* 224 * Line discipline switch table 225 */ 226 struct linesw { 227 l_open_t *l_open; 228 l_close_t *l_close; 229 l_read_t *l_read; 230 l_write_t *l_write; 231 l_ioctl_t *l_ioctl; 232 l_rint_t *l_rint; 233 l_start_t *l_start; 234 l_modem_t *l_modem; 235 u_char l_hotchar; 236 }; 237 238 #ifdef _KERNEL 239 extern struct linesw linesw[]; 240 extern int nlinesw; 241 242 int ldisc_register (int , struct linesw *); 243 void ldisc_deregister (int); 244 #define LDISC_LOAD -1 /* Loadable line discipline */ 245 #endif 246 247 /* 248 * Swap device table 249 */ 250 struct swdevt { 251 udev_t sw_dev; /* For quasibogus swapdev reporting */ 252 int sw_flags; 253 int sw_nblks; 254 struct vnode *sw_vp; 255 dev_t sw_device; 256 }; 257 #define SW_FREED 0x01 258 #define SW_SEQUENTIAL 0x02 259 #define sw_freed sw_flags /* XXX compat */ 260 261 #ifdef _KERNEL 262 d_open_t noopen; 263 d_close_t noclose; 264 d_read_t noread; 265 d_write_t nowrite; 266 d_ioctl_t noioctl; 267 d_clone_t noclone; 268 d_mmap_t nommap; 269 d_kqfilter_t nokqfilter; 270 d_strategy_t nostrategy; 271 d_poll_t nopoll; 272 d_psize_t nopsize; 273 d_dump_t nodump; 274 275 #define NUMCDEVSW 256 276 277 d_open_t nullopen; 278 d_close_t nullclose; 279 280 l_ioctl_t l_nullioctl; 281 l_read_t l_noread; 282 l_write_t l_nowrite; 283 284 struct module; 285 286 struct devsw_module_data { 287 int (*chainevh)(struct module *, int, void *); /* next handler */ 288 void *chainarg; /* arg for next event handler */ 289 /* Do not initialize fields hereafter */ 290 }; 291 292 #define DEV_MODULE(name, evh, arg) \ 293 static moduledata_t name##_mod = { \ 294 #name, \ 295 evh, \ 296 arg \ 297 }; \ 298 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 299 300 extern struct cdevsw dead_cdevsw; 301 302 void compile_devsw(struct cdevsw *); 303 int cdevsw_add (struct cdevsw *, u_int mask, u_int match); 304 struct cdevsw *cdevsw_add_override (dev_t, u_int mask, u_int match); 305 struct lwkt_port *cdevsw_dev_override(dev_t dev, struct lwkt_port *port); 306 307 int cdevsw_remove (struct cdevsw *, u_int mask, u_int match); 308 struct cdevsw *cdevsw_get (int x, int y); 309 void cdevsw_release (struct cdevsw *); 310 int count_dev (dev_t dev); 311 int count_udev (udev_t dev); 312 void destroy_dev (dev_t dev); 313 void destroy_all_dev (struct cdevsw *, u_int mask, u_int match); 314 void release_dev (dev_t dev); 315 dev_t reference_dev (dev_t dev); 316 struct cdevsw *devsw (dev_t dev); 317 const char *devtoname (dev_t dev); 318 void freedev (dev_t dev); 319 int iszerodev (dev_t dev); 320 dev_t make_dev (struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...) __printflike(6, 7); 321 dev_t make_adhoc_dev (struct cdevsw *devsw, int minor); 322 dev_t make_sub_dev (dev_t dev, int minor); 323 int lminor (dev_t dev); 324 void setconf (void); 325 dev_t getdiskbyname(const char *name); 326 int dev_is_good(dev_t dev); 327 328 /* 329 * XXX: This included for when DEVFS resurfaces 330 */ 331 332 #define UID_ROOT 0 333 #define UID_BIN 3 334 #define UID_UUCP 66 335 336 #define GID_WHEEL 0 337 #define GID_KMEM 2 338 #define GID_OPERATOR 5 339 #define GID_BIN 7 340 #define GID_GAMES 13 341 #define GID_DIALER 68 342 343 #endif /* _KERNEL */ 344 345 #endif /* !_SYS_CONF_H_ */ 346