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
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 #define SI_DEVOPEN 0x0020 /* opened by device */
64 #define SI_CONSOPEN 0x0040 /* opened by console */
65 struct timespec si_atime;
66 struct timespec si_ctime;
67 struct timespec si_mtime;
69 LIST_ENTRY(specinfo) si_hash;
70 SLIST_HEAD(, vnode) si_hlist;
71 LIST_HEAD(, specinfo) si_children;
72 LIST_ENTRY(specinfo) si_siblings;
74 struct snaphead si_snapshots;
75 int (*si_copyonwrite)(struct vnode *, struct buf *);
77 char si_name[SPECNAMELEN + 1];
78 void *si_drv1, *si_drv2;
79 struct cdevsw *si_devsw;
80 int si_iosize_max; /* maximum I/O size (for physio &al) */
86 struct tty *__sit_tty;
89 struct disk *__sid_disk;
90 struct mount *__sid_mountpoint;
91 int __sid_bsize_phys; /* min physical block size */
92 int __sid_bsize_best; /* optimal block size */
97 #define si_tty __si_u.__si_tty.__sit_tty
98 #define si_disk __si_u.__si_disk.__sid_disk
99 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
100 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
101 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
104 * Special device management
107 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
110 * Definitions of device driver entry switches
120 * Note: d_thread_t is provided as a transition aid for those drivers
121 * that treat struct proc/struct thread as an opaque data type and
122 * exist in substantially the same form in both 4.x and 5.x. Writers
123 * of drivers that dips into the d_thread_t structure should use
124 * struct thread or struct proc as appropriate for the version of the
125 * OS they are using. It is provided in lieu of each device driver
126 * inventing its own way of doing this. While it does violate style(9)
127 * in a number of ways, this violation is deemed to be less
128 * important than the benefits that a uniform API between releases
131 * Users of struct thread/struct proc that aren't device drivers should
132 * not use d_thread_t.
135 typedef struct thread d_thread_t;
137 typedef int d_open_t __P((dev_t dev, int oflags, int devtype,
139 typedef int d_close_t __P((dev_t dev, int fflag, int devtype,
141 typedef void d_strategy_t __P((struct bio *bp));
142 typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
143 int fflag, struct thread *td));
144 typedef int d_dump_t __P((dev_t dev));
145 typedef int d_psize_t __P((dev_t dev));
147 typedef int d_read_t __P((dev_t dev, struct uio *uio, int ioflag));
148 typedef int d_write_t __P((dev_t dev, struct uio *uio, int ioflag));
149 typedef int d_poll_t __P((dev_t dev, int events, struct thread *td));
150 typedef int d_kqfilter_t __P((dev_t dev, struct knote *kn));
151 typedef int d_mmap_t __P((dev_t dev, vm_offset_t offset, int nprot));
153 typedef int l_open_t __P((dev_t dev, struct tty *tp));
154 typedef int l_close_t __P((struct tty *tp, int flag));
155 typedef int l_read_t __P((struct tty *tp, struct uio *uio, int flag));
156 typedef int l_write_t __P((struct tty *tp, struct uio *uio, int flag));
157 typedef int l_ioctl_t __P((struct tty *tp, u_long cmd, caddr_t data,
158 int flag, struct thread*td));
159 typedef int l_rint_t __P((int c, struct tty *tp));
160 typedef int l_start_t __P((struct tty *tp));
161 typedef int l_modem_t __P((struct tty *tp, int flag));
164 * XXX: The dummy argument can be used to do what strategy1() never
165 * did anywhere: Create a per device flag to lock the device during
166 * label/slice surgery, all calls with a dummy == 0 gets stalled on
167 * a queue somewhere, whereas dummy == 1 are let through. Once out
168 * of surgery, reset the flag and restart all the stuff on the stall
171 #define BIO_STRATEGY(bp, dummy) \
173 if ((!(bp)->bio_cmd) || ((bp)->bio_cmd & ((bp)->bio_cmd - 1))) \
174 Debugger("bio_cmd botch"); \
175 (*devsw((bp)->bio_dev)->d_strategy)(bp); \
178 #define DEV_STRATEGY(bp, dummy) \
180 if ((bp)->b_flags & B_PHYS) \
181 (bp)->b_io.bio_offset = (bp)->b_offset; \
183 (bp)->b_io.bio_offset = dbtob((bp)->b_blkno); \
184 (bp)->b_io.bio_done = bufdonebio; \
185 (bp)->b_io.bio_caller2 = (bp); \
186 BIO_STRATEGY(&(bp)->b_io, dummy); \
194 #define D_TAPE 0x0001
195 #define D_DISK 0x0002
201 #define D_TYPEMASK 0xffff
206 #define D_MEMDISK 0x00010000 /* memory type disk */
207 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
208 #define D_CANFREE 0x00040000 /* can free blocks */
209 #define D_TRACKCLOSE 0x00080000 /* track all closes */
210 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
211 #define D_KQFILTER 0x00200000 /* has kqfilter entry */
214 * Character device switch table
224 d_strategy_t *d_strategy;
225 const char *d_name; /* base device name, e.g. 'vn' */
230 /* additions below are not binary compatible with 4.2 and below */
231 d_kqfilter_t *d_kqfilter;
235 * Line discipline switch table
249 extern struct linesw linesw[];
252 int ldisc_register __P((int , struct linesw *));
253 void ldisc_deregister __P((int));
254 #define LDISC_LOAD -1 /* Loadable line discipline */
261 udev_t sw_dev; /* For quasibogus swapdev reporting */
268 #define SW_FREED 0x01
269 #define SW_SEQUENTIAL 0x02
270 #define sw_freed sw_flags /* XXX compat */
279 d_kqfilter_t nokqfilter;
280 #define nostrategy ((d_strategy_t *)NULL)
281 #define nopoll seltrue
285 #define NUMCDEVSW 256
288 * nopsize is little used, so not worth having dummy functions for.
290 #define nopsize ((d_psize_t *)NULL)
295 l_ioctl_t l_nullioctl;
301 struct devsw_module_data {
302 int (*chainevh)(struct module *, int, void *); /* next handler */
303 void *chainarg; /* arg for next event handler */
304 /* Do not initialize fields hereafter */
307 #define DEV_MODULE(name, evh, arg) \
308 static moduledata_t name##_mod = { \
313 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
316 int cdevsw_add __P((struct cdevsw *new));
317 int cdevsw_remove __P((struct cdevsw *old));
318 int count_dev __P((dev_t dev));
319 void destroy_dev __P((dev_t dev));
320 void revoke_and_destroy_dev __P((dev_t dev));
321 struct cdevsw *devsw __P((dev_t dev));
322 const char *devtoname __P((dev_t dev));
323 int dev_named __P((dev_t pdev, const char *name));
324 void dev_depends __P((dev_t pdev, dev_t cdev));
325 void freedev __P((dev_t dev));
326 int iszerodev __P((dev_t dev));
327 dev_t makebdev __P((int maj, int min));
328 dev_t make_dev __P((struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...)) __printflike(6, 7);
329 dev_t make_dev_alias __P((dev_t pdev, const char *fmt, ...)) __printflike(2, 3);
330 int dev2unit __P((dev_t dev));
331 int unit2minor __P((int unit));
332 void setconf __P((void));
333 dev_t getdiskbyname(char *name);
335 /* This is type of the function DEVFS uses to hook into the kernel with */
336 typedef void devfs_create_t __P((dev_t dev));
337 typedef void devfs_destroy_t __P((dev_t dev));
339 extern devfs_create_t *devfs_create_hook;
340 extern devfs_destroy_t *devfs_destroy_hook;
341 extern int devfs_present;
349 #define GID_OPERATOR 5
352 #define GID_DIALER 68
354 typedef void (*dev_clone_fn) __P((void *arg, char *name, int namelen, dev_t *result));
356 int dev_stdclone __P((char *name, char **namep, char *stem, int *unit));
357 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
360 #endif /* !_SYS_CONF_H_ */