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 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)conf.h 8.5 (Berkeley) 1/9/95
44 #include <sys/eventhandler.h>
46 #include <sys/queue.h>
57 #define SI_ETERNAL 0x0001 /* never destroyed */
58 #define SI_ALIAS 0x0002 /* carrier of alias name */
59 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
60 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
61 #define SI_CHILD 0x0010 /* child of another struct cdev **/
62 #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
63 #define SI_CLONELIST 0x0200 /* on a clone list */
64 struct timespec si_atime;
65 struct timespec si_ctime;
66 struct timespec si_mtime;
70 struct ucred *si_cred; /* cached clone-time credential */
73 LIST_ENTRY(cdev) si_list;
74 LIST_ENTRY(cdev) si_clone;
75 LIST_HEAD(, cdev) si_children;
76 LIST_ENTRY(cdev) si_siblings;
77 struct cdev *si_parent;
78 struct mount *si_mountpt;
79 void *si_drv1, *si_drv2;
80 struct cdevsw *si_devsw;
81 int si_iosize_max; /* maximum I/O size (for physio &al) */
83 u_long si_threadcount;
85 struct snapdata *__sid_snapdata;
87 char si_name[SPECNAMELEN + 1];
90 #define si_snapdata __si_u.__sid_snapdata
95 * Definitions of device driver entry switches
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
119 * Users of struct thread/struct proc that aren't device drivers should
120 * not use d_thread_t.
123 typedef struct thread d_thread_t;
125 typedef int d_open_t(struct cdev *dev, int oflags, int devtype, struct thread *td);
126 typedef int d_fdopen_t(struct cdev *dev, int oflags, struct thread *td, struct file *fp);
127 typedef int d_close_t(struct cdev *dev, int fflag, int devtype, struct thread *td);
128 typedef void d_strategy_t(struct bio *bp);
129 typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data,
130 int fflag, struct thread *td);
132 typedef int d_read_t(struct cdev *dev, struct uio *uio, int ioflag);
133 typedef int d_write_t(struct cdev *dev, struct uio *uio, int ioflag);
134 typedef int d_poll_t(struct cdev *dev, int events, struct thread *td);
135 typedef int d_kqfilter_t(struct cdev *dev, struct knote *kn);
136 typedef int d_mmap_t(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
137 int nprot, vm_memattr_t *memattr);
138 typedef int d_mmap_single_t(struct cdev *cdev, vm_ooffset_t *offset,
139 vm_size_t size, struct vm_object **object, int nprot);
140 typedef void d_purge_t(struct cdev *dev);
142 typedef int dumper_t(
143 void *_priv, /* Private to the driver. */
144 void *_virtual, /* Virtual (mapped) address. */
145 vm_offset_t _physical, /* Physical address of virtual. */
146 off_t _offset, /* Byte-offset to write at. */
147 size_t _length); /* Number of bytes to dump. */
154 #define D_TAPE 0x0001
155 #define D_DISK 0x0002
161 #define D_TYPEMASK 0xffff
164 * Flags for d_flags which the drivers can set.
166 #define D_TRACKCLOSE 0x00080000 /* track all closes */
167 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
168 #define D_NEEDGIANT 0x00400000 /* driver want Giant */
169 #define D_NEEDMINOR 0x00800000 /* driver uses clone_create() */
170 #define D_UNMAPPED_IO 0x01000000 /* d_strategy can accept unmapped IO */
175 #define D_VERSION_00 0x20011966
176 #define D_VERSION_01 0x17032005 /* Add d_uid,gid,mode & kind */
177 #define D_VERSION_02 0x28042009 /* Add d_mmap_single */
178 #define D_VERSION_03 0x17122009 /* d_mmap takes memattr,vm_ooffset_t */
179 #define D_VERSION D_VERSION_03
182 * Flags used for internal housekeeping
184 #define D_INIT 0x80000000 /* cdevsw initialized */
187 * Character device switch table
194 d_fdopen_t *d_fdopen;
201 d_strategy_t *d_strategy;
203 d_kqfilter_t *d_kqfilter;
205 d_mmap_single_t *d_mmap_single;
210 /* These fields should not be messed with by drivers */
211 LIST_HEAD(, cdev) d_devs;
214 struct cdevsw *gianttrick;
215 SLIST_ENTRY(cdevsw) postfree_list;
218 #define d_gianttrick __d_giant.gianttrick
219 #define d_postfree_list __d_giant.postfree_list
223 struct devsw_module_data {
224 int (*chainevh)(struct module *, int, void *); /* next handler */
225 void *chainarg; /* arg for next event handler */
226 /* Do not initialize fields hereafter */
229 #define DEV_MODULE(name, evh, arg) \
230 static moduledata_t name##_mod = { \
235 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
238 void clone_setup(struct clonedevs **cdp);
239 void clone_cleanup(struct clonedevs **);
240 #define CLONE_UNITMASK 0xfffff
241 #define CLONE_FLAG0 (CLONE_UNITMASK + 1)
242 int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev **dev, int extra);
244 int count_dev(struct cdev *_dev);
245 void destroy_dev(struct cdev *_dev);
246 int destroy_dev_sched(struct cdev *dev);
247 int destroy_dev_sched_cb(struct cdev *dev, void (*cb)(void *), void *arg);
248 void destroy_dev_drain(struct cdevsw *csw);
249 void drain_dev_clone_events(void);
250 struct cdevsw *dev_refthread(struct cdev *_dev, int *_ref);
251 struct cdevsw *devvn_refthread(struct vnode *vp, struct cdev **devp, int *_ref);
252 void dev_relthread(struct cdev *_dev, int _ref);
253 void dev_depends(struct cdev *_pdev, struct cdev *_cdev);
254 void dev_ref(struct cdev *dev);
255 void dev_refl(struct cdev *dev);
256 void dev_rel(struct cdev *dev);
257 void dev_strategy(struct cdev *dev, struct buf *bp);
258 void dev_strategy_csw(struct cdev *dev, struct cdevsw *csw, struct buf *bp);
259 struct cdev *make_dev(struct cdevsw *_devsw, int _unit, uid_t _uid, gid_t _gid,
260 int _perms, const char *_fmt, ...) __printflike(6, 7);
261 struct cdev *make_dev_cred(struct cdevsw *_devsw, int _unit,
262 struct ucred *_cr, uid_t _uid, gid_t _gid, int _perms,
263 const char *_fmt, ...) __printflike(7, 8);
264 #define MAKEDEV_REF 0x01
265 #define MAKEDEV_WHTOUT 0x02
266 #define MAKEDEV_NOWAIT 0x04
267 #define MAKEDEV_WAITOK 0x08
268 #define MAKEDEV_ETERNAL 0x10
269 #define MAKEDEV_CHECKNAME 0x20
270 struct cdev *make_dev_credf(int _flags,
271 struct cdevsw *_devsw, int _unit,
272 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
273 const char *_fmt, ...) __printflike(8, 9);
274 int make_dev_p(int _flags, struct cdev **_cdev, struct cdevsw *_devsw,
275 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
276 const char *_fmt, ...) __printflike(8, 9);
277 struct cdev *make_dev_alias(struct cdev *_pdev, const char *_fmt, ...)
279 int make_dev_alias_p(int _flags, struct cdev **_cdev, struct cdev *_pdev,
280 const char *_fmt, ...) __printflike(4, 5);
281 int make_dev_physpath_alias(int _flags, struct cdev **_cdev,
282 struct cdev *_pdev, struct cdev *_old_alias,
283 const char *_physpath);
285 void dev_unlock(void);
289 #define MAKEDEV_ETERNAL_KLD 0
291 #define MAKEDEV_ETERNAL_KLD MAKEDEV_ETERNAL
294 #define dev2unit(d) ((d)->si_drv0)
296 typedef void (*cdevpriv_dtr_t)(void *data);
297 int devfs_get_cdevpriv(void **datap);
298 int devfs_set_cdevpriv(void *priv, cdevpriv_dtr_t dtr);
299 void devfs_clear_cdevpriv(void);
300 void devfs_fpdrop(struct file *fp); /* XXX This is not public KPI */
302 ino_t devfs_alloc_cdp_inode(void);
303 void devfs_free_cdp_inode(ino_t ino);
308 #define UID_NOBODY 65534
313 #define GID_OPERATOR 5
316 #define GID_DIALER 68
317 #define GID_NOBODY 65534
319 typedef void (*dev_clone_fn)(void *arg, struct ucred *cred, char *name,
320 int namelen, struct cdev **result);
322 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
323 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
325 /* Stuff relating to kernel-dump */
328 dumper_t *dumper; /* Dumping function. */
329 void *priv; /* Private parts. */
330 u_int blocksize; /* Size of block in bytes. */
331 u_int maxiosize; /* Max size allowed for an individual I/O */
332 off_t mediaoffset; /* Initial offset in bytes. */
333 off_t mediasize; /* Space available in bytes. */
336 int set_dumper(struct dumperinfo *, const char *_devname);
337 int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t);
338 void dumpsys(struct dumperinfo *);
339 int doadump(boolean_t);
340 extern int dumping; /* system is dumping */
344 #endif /* !_SYS_CONF_H_ */