source: rtems-libbsd/freebsd/sys/sys/conf.h @ 595b333

4.1155-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since 595b333 was 595b333, checked in by Sebastian Huber <sebastian.huber@…>, on 05/20/15 at 11:49:05

Add INVARIANTS support
  • Property mode set to 100644
File size: 11.8 KB
Line 
1/*-
2 * Copyright (c) 1990, 1993
3 *      The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 2000
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.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 *
36 *      @(#)conf.h      8.5 (Berkeley) 1/9/95
37 * $FreeBSD$
38 */
39
40#ifndef _SYS_CONF_H_
41#define _SYS_CONF_H_
42
43#ifdef _KERNEL
44#include <sys/eventhandler.h>
45#else
46#include <sys/queue.h>
47#endif
48
49struct snapdata;
50struct devfs_dirent;
51struct cdevsw;
52struct file;
53#ifdef __rtems__
54struct ucred;
55#endif /* __rtems__ */
56
57struct cdev {
58        struct mount    *si_mountpt;
59        u_int           si_flags;
60#define SI_ETERNAL      0x0001  /* never destroyed */
61#define SI_ALIAS        0x0002  /* carrier of alias name */
62#define SI_NAMED        0x0004  /* make_dev{_alias} has been called */
63#define SI_CHEAPCLONE   0x0008  /* can be removed_dev'ed when vnode reclaims */
64#define SI_CHILD        0x0010  /* child of another struct cdev **/
65#define SI_DEVOPEN      0x0020  /* opened by device */
66#define SI_CONSOPEN     0x0040  /* opened by console */
67#define SI_DUMPDEV      0x0080  /* is kernel dumpdev */
68#define SI_CANDELETE    0x0100  /* can do BIO_DELETE */
69#define SI_CLONELIST    0x0200  /* on a clone list */
70#define SI_UNMAPPED     0x0400  /* can handle unmapped I/O */
71#ifndef __rtems__
72        struct timespec si_atime;
73        struct timespec si_ctime;
74        struct timespec si_mtime;
75        uid_t           si_uid;
76        gid_t           si_gid;
77        mode_t          si_mode;
78        struct ucred    *si_cred;       /* cached clone-time credential */
79#endif /* __rtems__ */
80        int             si_drv0;
81#ifndef __rtems__
82        int             si_refcount;
83        LIST_ENTRY(cdev)        si_list;
84        LIST_ENTRY(cdev)        si_clone;
85        LIST_HEAD(, cdev)       si_children;
86        LIST_ENTRY(cdev)        si_siblings;
87        struct cdev *si_parent;
88        char            *si_name;
89#endif /* __rtems__ */
90        void            *si_drv1, *si_drv2;
91#ifndef __rtems__
92        struct cdevsw   *si_devsw;
93        int             si_iosize_max;  /* maximum I/O size (for physio &al) */
94        u_long          si_usecount;
95        u_long          si_threadcount;
96        union {
97                struct snapdata *__sid_snapdata;
98        } __si_u;
99        char            __si_namebuf[SPECNAMELEN + 1];
100#endif /* __rtems__ */
101};
102
103#define si_snapdata     __si_u.__sid_snapdata
104
105#ifdef _KERNEL
106
107/*
108 * Definitions of device driver entry switches
109 */
110
111struct bio;
112struct buf;
113struct thread;
114struct uio;
115struct knote;
116struct clonedevs;
117struct vm_object;
118struct vnode;
119
120/*
121 * Note: d_thread_t is provided as a transition aid for those drivers
122 * that treat struct proc/struct thread as an opaque data type and
123 * exist in substantially the same form in both 4.x and 5.x.  Writers
124 * of drivers that dips into the d_thread_t structure should use
125 * struct thread or struct proc as appropriate for the version of the
126 * OS they are using.  It is provided in lieu of each device driver
127 * inventing its own way of doing this.  While it does violate style(9)
128 * in a number of ways, this violation is deemed to be less
129 * important than the benefits that a uniform API between releases
130 * gives.
131 *
132 * Users of struct thread/struct proc that aren't device drivers should
133 * not use d_thread_t.
134 */
135
136typedef struct thread d_thread_t;
137
138typedef int d_open_t(struct cdev *dev, int oflags, int devtype, struct thread *td);
139typedef int d_fdopen_t(struct cdev *dev, int oflags, struct thread *td, struct file *fp);
140typedef int d_close_t(struct cdev *dev, int fflag, int devtype, struct thread *td);
141typedef void d_strategy_t(struct bio *bp);
142typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data,
143                      int fflag, struct thread *td);
144
145typedef int d_read_t(struct cdev *dev, struct uio *uio, int ioflag);
146typedef int d_write_t(struct cdev *dev, struct uio *uio, int ioflag);
147typedef int d_poll_t(struct cdev *dev, int events, struct thread *td);
148typedef int d_kqfilter_t(struct cdev *dev, struct knote *kn);
149typedef int d_mmap_t(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
150                     int nprot, vm_memattr_t *memattr);
151typedef int d_mmap_single_t(struct cdev *cdev, vm_ooffset_t *offset,
152    vm_size_t size, struct vm_object **object, int nprot);
153typedef void d_purge_t(struct cdev *dev);
154
155typedef int dumper_t(
156        void *_priv,            /* Private to the driver. */
157        void *_virtual,         /* Virtual (mapped) address. */
158        vm_offset_t _physical,  /* Physical address of virtual. */
159        off_t _offset,          /* Byte-offset to write at. */
160        size_t _length);        /* Number of bytes to dump. */
161
162#endif /* _KERNEL */
163
164/*
165 * Types for d_flags.
166 */
167#define D_TAPE  0x0001
168#define D_DISK  0x0002
169#define D_TTY   0x0004
170#define D_MEM   0x0008
171
172#ifdef _KERNEL
173
174#define D_TYPEMASK      0xffff
175
176/*
177 * Flags for d_flags which the drivers can set.
178 */
179#define D_TRACKCLOSE    0x00080000      /* track all closes */
180#define D_MMAP_ANON     0x00100000      /* special treatment in vm_mmap.c */
181#define D_PSEUDO        0x00200000      /* make_dev() can return NULL */
182#define D_NEEDGIANT     0x00400000      /* driver want Giant */
183#define D_NEEDMINOR     0x00800000      /* driver uses clone_create() */
184#define D_UNMAPPED_IO   0x01000000      /* d_strategy can accept unmapped IO */
185
186/*
187 * Version numbers.
188 */
189#define D_VERSION_00    0x20011966
190#define D_VERSION_01    0x17032005      /* Add d_uid,gid,mode & kind */
191#define D_VERSION_02    0x28042009      /* Add d_mmap_single */
192#define D_VERSION_03    0x17122009      /* d_mmap takes memattr,vm_ooffset_t */
193#define D_VERSION       D_VERSION_03
194
195/*
196 * Flags used for internal housekeeping
197 */
198#define D_INIT          0x80000000      /* cdevsw initialized */
199
200/*
201 * Character device switch table
202 */
203struct cdevsw {
204        int                     d_version;
205        u_int                   d_flags;
206        const char              *d_name;
207        d_open_t                *d_open;
208        d_fdopen_t              *d_fdopen;
209        d_close_t               *d_close;
210        d_read_t                *d_read;
211        d_write_t               *d_write;
212        d_ioctl_t               *d_ioctl;
213        d_poll_t                *d_poll;
214        d_mmap_t                *d_mmap;
215        d_strategy_t            *d_strategy;
216        dumper_t                *d_dump;
217        d_kqfilter_t            *d_kqfilter;
218        d_purge_t               *d_purge;
219        d_mmap_single_t         *d_mmap_single;
220
221        int32_t                 d_spare0[3];
222        void                    *d_spare1[3];
223
224        /* These fields should not be messed with by drivers */
225        LIST_HEAD(, cdev)       d_devs;
226        int                     d_spare2;
227        union {
228                struct cdevsw           *gianttrick;
229                SLIST_ENTRY(cdevsw)     postfree_list;
230        } __d_giant;
231};
232#define d_gianttrick            __d_giant.gianttrick
233#define d_postfree_list         __d_giant.postfree_list
234
235struct module;
236
237struct devsw_module_data {
238        int     (*chainevh)(struct module *, int, void *); /* next handler */
239        void    *chainarg;      /* arg for next event handler */
240        /* Do not initialize fields hereafter */
241};
242
243#define DEV_MODULE(name, evh, arg)                                      \
244static moduledata_t name##_mod = {                                      \
245    #name,                                                              \
246    evh,                                                                \
247    arg                                                                 \
248};                                                                      \
249DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
250
251
252void clone_setup(struct clonedevs **cdp);
253void clone_cleanup(struct clonedevs **);
254#define CLONE_UNITMASK 0xfffff
255#define CLONE_FLAG0 (CLONE_UNITMASK + 1)
256int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev **dev, int extra);
257
258int     count_dev(struct cdev *_dev);
259void    delist_dev(struct cdev *_dev);
260void    destroy_dev(struct cdev *_dev);
261int     destroy_dev_sched(struct cdev *dev);
262int     destroy_dev_sched_cb(struct cdev *dev, void (*cb)(void *), void *arg);
263void    destroy_dev_drain(struct cdevsw *csw);
264void    drain_dev_clone_events(void);
265struct cdevsw *dev_refthread(struct cdev *_dev, int *_ref);
266struct cdevsw *devvn_refthread(struct vnode *vp, struct cdev **devp, int *_ref);
267void    dev_relthread(struct cdev *_dev, int _ref);
268void    dev_depends(struct cdev *_pdev, struct cdev *_cdev);
269void    dev_ref(struct cdev *dev);
270void    dev_refl(struct cdev *dev);
271void    dev_rel(struct cdev *dev);
272void    dev_strategy(struct cdev *dev, struct buf *bp);
273void    dev_strategy_csw(struct cdev *dev, struct cdevsw *csw, struct buf *bp);
274struct cdev *make_dev(struct cdevsw *_devsw, int _unit, uid_t _uid, gid_t _gid,
275                int _perms, const char *_fmt, ...) __printflike(6, 7);
276struct cdev *make_dev_cred(struct cdevsw *_devsw, int _unit,
277                struct ucred *_cr, uid_t _uid, gid_t _gid, int _perms,
278                const char *_fmt, ...) __printflike(7, 8);
279#define MAKEDEV_REF             0x01
280#define MAKEDEV_WHTOUT          0x02
281#define MAKEDEV_NOWAIT          0x04
282#define MAKEDEV_WAITOK          0x08
283#define MAKEDEV_ETERNAL         0x10
284#define MAKEDEV_CHECKNAME       0x20
285struct cdev *make_dev_credf(int _flags,
286                struct cdevsw *_devsw, int _unit,
287                struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
288                const char *_fmt, ...) __printflike(8, 9);
289int     make_dev_p(int _flags, struct cdev **_cdev, struct cdevsw *_devsw,
290                struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
291                const char *_fmt, ...) __printflike(8, 9);
292struct cdev *make_dev_alias(struct cdev *_pdev, const char *_fmt, ...)
293                __printflike(2, 3);
294int     make_dev_alias_p(int _flags, struct cdev **_cdev, struct cdev *_pdev,
295                const char *_fmt, ...) __printflike(4, 5);
296int     make_dev_physpath_alias(int _flags, struct cdev **_cdev,
297                struct cdev *_pdev, struct cdev *_old_alias,
298                const char *_physpath);
299void    dev_lock(void);
300void    dev_unlock(void);
301void    setconf(void);
302
303#ifdef KLD_MODULE
304#define MAKEDEV_ETERNAL_KLD     0
305#else
306#define MAKEDEV_ETERNAL_KLD     MAKEDEV_ETERNAL
307#endif
308
309#define dev2unit(d)     ((d)->si_drv0)
310
311typedef void (*cdevpriv_dtr_t)(void *data);
312int     devfs_get_cdevpriv(void **datap);
313int     devfs_set_cdevpriv(void *priv, cdevpriv_dtr_t dtr);
314void    devfs_clear_cdevpriv(void);
315void    devfs_fpdrop(struct file *fp);  /* XXX This is not public KPI */
316
317ino_t   devfs_alloc_cdp_inode(void);
318void    devfs_free_cdp_inode(ino_t ino);
319
320#define         UID_ROOT        0
321#define         UID_BIN         3
322#define         UID_UUCP        66
323#define         UID_NOBODY      65534
324
325#define         GID_WHEEL       0
326#define         GID_KMEM        2
327#define         GID_TTY         4
328#define         GID_OPERATOR    5
329#define         GID_BIN         7
330#define         GID_GAMES       13
331#define         GID_DIALER      68
332#define         GID_NOBODY      65534
333
334typedef void (*dev_clone_fn)(void *arg, struct ucred *cred, char *name,
335            int namelen, struct cdev **result);
336
337int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
338EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
339
340/* Stuff relating to kernel-dump */
341
342struct dumperinfo {
343        dumper_t *dumper;       /* Dumping function. */
344        void    *priv;          /* Private parts. */
345        u_int   blocksize;      /* Size of block in bytes. */
346        u_int   maxiosize;      /* Max size allowed for an individual I/O */
347        off_t   mediaoffset;    /* Initial offset in bytes. */
348        off_t   mediasize;      /* Space available in bytes. */
349};
350
351int set_dumper(struct dumperinfo *);
352int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t);
353void dumpsys(struct dumperinfo *);
354int doadump(boolean_t);
355#ifndef __rtems__
356extern int dumping;             /* system is dumping */
357#else /* __rtems__ */
358#define dumping 0
359#endif /* __rtems__ */
360
361#endif /* _KERNEL */
362
363#endif /* !_SYS_CONF_H_ */
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