2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Poul-Henning Kamp. 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.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * @(#)conf.h 8.5 (Berkeley) 1/9/95
48 #include <sys/eventhandler.h>
54 TAILQ_HEAD(snaphead, inode);
58 #define SI_STASHED 0x0001 /* created in stashed storage */
59 #define SI_ALIAS 0x0002 /* carrier of alias name */
60 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
61 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
62 #define SI_CHILD 0x0010 /* child of another dev_t */
63 struct timespec si_atime;
64 struct timespec si_ctime;
65 struct timespec si_mtime;
67 LIST_ENTRY(specinfo) si_hash;
68 SLIST_HEAD(, vnode) si_hlist;
69 LIST_HEAD(, specinfo) si_children;
70 LIST_ENTRY(specinfo) si_siblings;
72 struct snaphead si_snapshots;
73 int (*si_copyonwrite)(struct vnode *, struct buf *);
75 char si_name[SPECNAMELEN + 1];
76 void *si_drv1, *si_drv2;
77 struct cdevsw *si_devsw;
78 int si_iosize_max; /* maximum I/O size (for physio &al) */
84 struct tty *__sit_tty;
87 struct disk *__sid_disk;
88 struct mount *__sid_mountpoint;
89 int __sid_bsize_phys; /* min physical block size */
90 int __sid_bsize_best; /* optimal block size */
95 #define si_tty __si_u.__si_tty.__sit_tty
96 #define si_disk __si_u.__si_disk.__sid_disk
97 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
98 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
99 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
102 * Special device management
105 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
108 * Definitions of device driver entry switches
117 typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
118 typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
119 typedef void d_strategy_t __P((struct bio *bp));
120 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
121 int fflag, struct proc *p));
122 typedef int d_dump_t __P((dev_t dev));
123 typedef int d_psize_t __P((dev_t dev));
125 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
126 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
127 typedef int d_poll_t __P((dev_t dev, int events, struct proc *p));
128 typedef int d_kqfilter_t __P((dev_t dev, struct knote *kn));
129 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
131 typedef int l_open_t __P((dev_t dev, struct tty *tp));
132 typedef int l_close_t __P((struct tty *tp, int flag));
133 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
134 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
135 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
136 int flag, struct proc *p));
137 typedef int l_rint_t __P((int c, struct tty *tp));
138 typedef int l_start_t __P((struct tty *tp));
139 typedef int l_modem_t __P((struct tty *tp, int flag));
142 * XXX: The dummy argument can be used to do what strategy1() never
143 * did anywhere: Create a per device flag to lock the device during
144 * label/slice surgery, all calls with a dummy == 0 gets stalled on
145 * a queue somewhere, whereas dummy == 1 are let through. Once out
146 * of surgery, reset the flag and restart all the stuff on the stall
149 #define BIO_STRATEGY(bp, dummy) \
151 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \
152 Debugger("bio_cmd botch"); \
153 (*devsw((bp)->bio_dev)->d_strategy)(bp); \
156 #define DEV_STRATEGY(bp, dummy) \
158 if ((bp)->b_flags & B_PHYS) \
159 (bp)->b_io.bio_offset = (bp)->b_offset; \
161 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
162 (bp)->b_io.bio_done = bufdonebio; \
163 (bp)->b_io.bio_caller2 = (bp); \
164 BIO_STRATEGY(&(bp)->b_io, dummy); \
172 #define D_TAPE 0x0001
173 #define D_DISK 0x0002
179 #define D_TYPEMASK 0xffff
184 #define D_MEMDISK 0x00010000 /* memory type disk */
185 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
186 #define D_CANFREE 0x00040000 /* can free blocks */
187 #define D_TRACKCLOSE 0x00080000 /* track all closes */
188 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
189 #define D_KQFILTER 0x00200000 /* has kqfilter entry */
192 * Character device switch table
202 d_strategy_t *d_strategy;
203 const char *d_name; /* base device name, e.g. 'vn' */
208 /* additions below are not binary compatible with 4.2 and below */
209 d_kqfilter_t *d_kqfilter;
213 * Line discipline switch table
227 extern struct linesw linesw[];
230 int ldisc_register __P((int , struct linesw *));
231 void ldisc_deregister __P((int));
232 #define LDISC_LOAD -1 /* Loadable line discipline */
239 udev_t sw_dev; /* For quasibogus swapdev reporting */
246 #define SW_FREED 0x01
247 #define SW_SEQUENTIAL 0x02
248 #define sw_freed sw_flags /* XXX compat */
257 d_kqfilter_t nokqfilter;
258 #define nostrategy ((d_strategy_t *)NULL)
259 #define nopoll seltrue
263 #define NUMCDEVSW 256
266 * nopsize is little used, so not worth having dummy functions for.
268 #define nopsize ((d_psize_t *)NULL)
273 l_ioctl_t l_nullioctl;
279 struct devsw_module_data {
280 int (*chainevh)(struct module *, int, void *); /* next handler */
281 void *chainarg; /* arg for next event handler */
282 /* Do not initialize fields hereafter */
285 #define DEV_MODULE(name, evh, arg) \
286 static moduledata_t name##_mod = { \
291 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
294 int cdevsw_add __P((struct cdevsw *new));
295 int cdevsw_remove __P((struct cdevsw *old));
296 int count_dev __P((dev_t dev));
297 void destroy_dev __P((dev_t dev));
298 struct cdevsw *devsw __P((dev_t dev));
299 const char *devtoname __P((dev_t dev));
300 void dev_depends __P((dev_t pdev, dev_t cdev));
301 void freedev __P((dev_t dev));
302 int iszerodev __P((dev_t dev));
303 dev_t makebdev __P((int maj, int min));
304 dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...)) __printflike(6, 7);
305 dev_t make_dev_alias __P((dev_t pdev, const char *fmt, ...)) __printflike(2, 3);
306 int dev2unit __P((dev_t dev));
307 int unit2minor __P((int unit));
308 void setconf __P((void));
309 dev_t getdiskbyname(char *name);
311 /* This is type of the function DEVFS uses to hook into the kernel with */
312 typedef void devfs_create_t __P((dev_t dev));
313 typedef void devfs_destroy_t __P((dev_t dev));
315 extern devfs_create_t *devfs_create_hook;
316 extern devfs_destroy_t *devfs_destroy_hook;
317 extern int devfs_present;
320 * XXX: This included for when DEVFS resurfaces
329 #define GID_OPERATOR 5
332 #define GID_DIALER 68
334 typedef void (*dev_clone_fn) __P((void *arg, char *name, int namelen, dev_t *result));
336 int dev_stdclone __P((char *name, char **namep, char *stem, int *unit));
337 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
340 #endif /* !_SYS_CONF_H_ */