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.
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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 #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
66 struct timespec si_atime;
67 struct timespec si_ctime;
68 struct timespec si_mtime;
70 LIST_ENTRY(cdev) si_hash;
71 SLIST_HEAD(, vnode) si_hlist;
72 LIST_HEAD(, cdev) si_children;
73 LIST_ENTRY(cdev) si_siblings;
75 struct snaphead si_snapshots;
76 int (*si_copyonwrite)(struct vnode *, struct buf *);
78 char si_name[SPECNAMELEN + 1];
79 void *si_drv1, *si_drv2;
80 struct cdevsw *si_devsw;
81 int si_iosize_max; /* maximum I/O size (for physio &al) */
88 struct tty *__sit_tty;
91 struct disk *__sid_disk;
92 struct mount *__sid_mountpoint;
93 int __sid_bsize_phys; /* min physical block size */
94 int __sid_bsize_best; /* optimal block size */
99 #define si_tty __si_u.__si_tty.__sit_tty
100 #define si_disk __si_u.__si_disk.__sid_disk
101 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
102 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
103 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
106 * Special device management
109 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
112 * Definitions of device driver entry switches
122 * Note: d_thread_t is provided as a transition aid for those drivers
123 * that treat struct proc/struct thread as an opaque data type and
124 * exist in substantially the same form in both 4.x and 5.x. Writers
125 * of drivers that dips into the d_thread_t structure should use
126 * struct thread or struct proc as appropriate for the version of the
127 * OS they are using. It is provided in lieu of each device driver
128 * inventing its own way of doing this. While it does violate style(9)
129 * in a number of ways, this violation is deemed to be less
130 * important than the benefits that a uniform API between releases
133 * Users of struct thread/struct proc that aren't device drivers should
134 * not use d_thread_t.
137 typedef struct thread d_thread_t;
139 typedef int d_open_t(dev_t dev, int oflags, int devtype, struct thread *td);
140 typedef int d_close_t(dev_t dev, int fflag, int devtype, struct thread *td);
141 typedef void d_strategy_t(struct bio *bp);
142 typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
143 int fflag, struct thread *td);
144 typedef int d_dump_t(dev_t dev,void *virtual, vm_offset_t physical, off_t offset, size_t length);
145 typedef int d_psize_t(dev_t dev);
147 typedef int d_read_t(dev_t dev, struct uio *uio, int ioflag);
148 typedef int d_write_t(dev_t dev, struct uio *uio, int ioflag);
149 typedef int d_poll_t(dev_t dev, int events, struct thread *td);
150 typedef int d_kqfilter_t(dev_t dev, struct knote *kn);
151 typedef int d_mmap_t(dev_t dev, vm_offset_t offset, int nprot);
153 typedef int l_open_t(dev_t dev, struct tty *tp);
154 typedef int l_close_t(struct tty *tp, int flag);
155 typedef int l_read_t(struct tty *tp, struct uio *uio, int flag);
156 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag);
157 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data,
158 int flag, struct thread *td);
159 typedef int l_rint_t(int c, struct tty *tp);
160 typedef int l_start_t(struct tty *tp);
161 typedef int l_modem_t(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 */
212 #define D_NOGIANT 0x00400000 /* Doesn't want Giant */
215 * Character device switch table
225 d_strategy_t *d_strategy;
226 const char *d_name; /* base device name, e.g. 'vn' */
231 /* additions below are not binary compatible with 4.2 and below */
232 d_kqfilter_t *d_kqfilter;
236 * Line discipline switch table
250 extern struct linesw linesw[];
253 int ldisc_register(int , struct linesw *);
254 void ldisc_deregister(int);
255 #define LDISC_LOAD -1 /* Loadable line discipline */
262 udev_t sw_dev; /* For quasibogus swapdev reporting */
269 #define SW_FREED 0x01
270 #define SW_SEQUENTIAL 0x02
271 #define sw_freed sw_flags /* XXX compat */
280 d_kqfilter_t nokqfilter;
281 #define nostrategy ((d_strategy_t *)NULL)
282 #define nopoll seltrue
286 #define NUMCDEVSW 256
289 * nopsize is little used, so not worth having dummy functions for.
291 #define nopsize ((d_psize_t *)NULL)
296 l_ioctl_t l_nullioctl;
302 struct devsw_module_data {
303 int (*chainevh)(struct module *, int, void *); /* next handler */
304 void *chainarg; /* arg for next event handler */
305 /* Do not initialize fields hereafter */
308 #define DEV_MODULE(name, evh, arg) \
309 static moduledata_t name##_mod = { \
314 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
317 int cdevsw_add(struct cdevsw *_new);
318 int cdevsw_remove(struct cdevsw *_old);
319 int count_dev(dev_t _dev);
320 void destroy_dev(dev_t _dev);
321 void revoke_and_destroy_dev(dev_t _dev);
322 struct cdevsw *devsw(dev_t _dev);
323 const char *devtoname(dev_t _dev);
324 int dev_named(dev_t _pdev, const char *_name);
325 void dev_depends(dev_t _pdev, dev_t _cdev);
326 void freedev(dev_t _dev);
327 int iszerodev(dev_t _dev);
328 dev_t makebdev(int _maj, int _min);
329 dev_t make_dev(struct cdevsw *_devsw, int _minor, uid_t _uid, gid_t _gid,
330 int _perms, const char *_fmt, ...) __printflike(6, 7);
331 dev_t make_dev_alias(dev_t _pdev, const char *_fmt, ...) __printflike(2, 3);
332 int dev2unit(dev_t _dev);
333 int unit2minor(int _unit);
335 dev_t getdiskbyname(char *_name);
337 /* This is type of the function DEVFS uses to hook into the kernel with */
338 typedef void devfs_create_t(dev_t dev);
339 typedef void devfs_destroy_t(dev_t dev);
341 extern devfs_create_t *devfs_create_hook;
342 extern devfs_destroy_t *devfs_destroy_hook;
343 extern int devfs_present;
351 #define GID_OPERATOR 5
354 #define GID_DIALER 68
356 typedef void (*dev_clone_fn)(void *arg, char *name, int namelen, dev_t *result);
358 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
359 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
361 /* Stuff relating to kernel-dump */
363 typedef int dumper_t(
364 void *priv, /* Private to the driver. */
365 void *virtual, /* Virtual (mapped) address. */
366 vm_offset_t physical, /* Physical address of virtual. */
367 off_t offset, /* Byte-offset to write at. */
368 size_t length); /* Number of bytes to dump. */
371 dumper_t *dumper; /* Dumping function. */
372 void *priv; /* Private parts. */
373 u_int blocksize; /* Size of block in bytes. */
374 off_t mediaoffset; /* Initial offset in bytes. */
375 off_t mediasize; /* Space available in bytes. */
378 int set_dumper(struct dumperinfo *);
379 void dumpsys(struct dumperinfo *);
380 extern int dumping; /* system is dumping */
384 #endif /* !_SYS_CONF_H_ */