FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 2000
7 * Poul-Henning Kamp. All rights reserved.
8 * (c) UNIX System Laboratories, Inc.
9 * All or some portions of this file are derived from material licensed
10 * to the University of California by American Telephone and Telegraph
11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
12 * the permission of UNIX System Laboratories, Inc.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)conf.h 8.5 (Berkeley) 1/9/95
39 * $FreeBSD: releng/12.0/sys/sys/conf.h 333282 2018-05-06 00:22:38Z markj $
40 */
41
42 #ifndef _SYS_CONF_H_
43 #define _SYS_CONF_H_
44
45 #ifdef _KERNEL
46 #include <sys/eventhandler.h>
47 #else
48 #include <sys/queue.h>
49 #endif
50
51 struct snapdata;
52 struct devfs_dirent;
53 struct cdevsw;
54 struct file;
55
56 struct cdev {
57 void *si_spare0;
58 u_int si_flags;
59 #define SI_ETERNAL 0x0001 /* never destroyed */
60 #define SI_ALIAS 0x0002 /* carrier of alias name */
61 #define SI_NAMED 0x0004 /* make_dev{_alias} has been called */
62 #define SI_CHEAPCLONE 0x0008 /* can be removed_dev'ed when vnode reclaims */
63 #define SI_CHILD 0x0010 /* child of another struct cdev **/
64 #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */
65 #define SI_CLONELIST 0x0200 /* on a clone list */
66 #define SI_UNMAPPED 0x0400 /* can handle unmapped I/O */
67 #define SI_NOSPLIT 0x0800 /* I/O should not be split up */
68 struct timespec si_atime;
69 struct timespec si_ctime;
70 struct timespec si_mtime;
71 uid_t si_uid;
72 gid_t si_gid;
73 mode_t si_mode;
74 struct ucred *si_cred; /* cached clone-time credential */
75 int si_drv0;
76 int si_refcount;
77 LIST_ENTRY(cdev) si_list;
78 LIST_ENTRY(cdev) si_clone;
79 LIST_HEAD(, cdev) si_children;
80 LIST_ENTRY(cdev) si_siblings;
81 struct cdev *si_parent;
82 struct mount *si_mountpt;
83 void *si_drv1, *si_drv2;
84 struct cdevsw *si_devsw;
85 int si_iosize_max; /* maximum I/O size (for physio &al) */
86 u_long si_usecount;
87 u_long si_threadcount;
88 union {
89 struct snapdata *__sid_snapdata;
90 } __si_u;
91 char si_name[SPECNAMELEN + 1];
92 };
93
94 #define si_snapdata __si_u.__sid_snapdata
95
96 #ifdef _KERNEL
97
98 /*
99 * Definitions of device driver entry switches
100 */
101
102 struct bio;
103 struct buf;
104 struct dumperinfo;
105 struct kerneldumpheader;
106 struct thread;
107 struct uio;
108 struct knote;
109 struct clonedevs;
110 struct vm_object;
111 struct vnode;
112
113 typedef int d_open_t(struct cdev *dev, int oflags, int devtype, struct thread *td);
114 typedef int d_fdopen_t(struct cdev *dev, int oflags, struct thread *td, struct file *fp);
115 typedef int d_close_t(struct cdev *dev, int fflag, int devtype, struct thread *td);
116 typedef void d_strategy_t(struct bio *bp);
117 typedef int d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data,
118 int fflag, struct thread *td);
119
120 typedef int d_read_t(struct cdev *dev, struct uio *uio, int ioflag);
121 typedef int d_write_t(struct cdev *dev, struct uio *uio, int ioflag);
122 typedef int d_poll_t(struct cdev *dev, int events, struct thread *td);
123 typedef int d_kqfilter_t(struct cdev *dev, struct knote *kn);
124 typedef int d_mmap_t(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
125 int nprot, vm_memattr_t *memattr);
126 typedef int d_mmap_single_t(struct cdev *cdev, vm_ooffset_t *offset,
127 vm_size_t size, struct vm_object **object, int nprot);
128 typedef void d_purge_t(struct cdev *dev);
129
130 typedef int dumper_t(
131 void *_priv, /* Private to the driver. */
132 void *_virtual, /* Virtual (mapped) address. */
133 vm_offset_t _physical, /* Physical address of virtual. */
134 off_t _offset, /* Byte-offset to write at. */
135 size_t _length); /* Number of bytes to dump. */
136 typedef int dumper_start_t(struct dumperinfo *di);
137 typedef int dumper_hdr_t(struct dumperinfo *di, struct kerneldumpheader *kdh,
138 void *key, uint32_t keylen);
139
140 #endif /* _KERNEL */
141
142 /*
143 * Types for d_flags.
144 */
145 #define D_TAPE 0x0001
146 #define D_DISK 0x0002
147 #define D_TTY 0x0004
148 #define D_MEM 0x0008 /* /dev/(k)mem */
149
150 #ifdef _KERNEL
151
152 #define D_TYPEMASK 0xffff
153
154 /*
155 * Flags for d_flags which the drivers can set.
156 */
157 #define D_TRACKCLOSE 0x00080000 /* track all closes */
158 #define D_MMAP_ANON 0x00100000 /* special treatment in vm_mmap.c */
159 #define D_NEEDGIANT 0x00400000 /* driver want Giant */
160 #define D_NEEDMINOR 0x00800000 /* driver uses clone_create() */
161
162 /*
163 * Version numbers.
164 */
165 #define D_VERSION_00 0x20011966
166 #define D_VERSION_01 0x17032005 /* Add d_uid,gid,mode & kind */
167 #define D_VERSION_02 0x28042009 /* Add d_mmap_single */
168 #define D_VERSION_03 0x17122009 /* d_mmap takes memattr,vm_ooffset_t */
169 #define D_VERSION D_VERSION_03
170
171 /*
172 * Flags used for internal housekeeping
173 */
174 #define D_INIT 0x80000000 /* cdevsw initialized */
175
176 /*
177 * Character device switch table
178 */
179 struct cdevsw {
180 int d_version;
181 u_int d_flags;
182 const char *d_name;
183 d_open_t *d_open;
184 d_fdopen_t *d_fdopen;
185 d_close_t *d_close;
186 d_read_t *d_read;
187 d_write_t *d_write;
188 d_ioctl_t *d_ioctl;
189 d_poll_t *d_poll;
190 d_mmap_t *d_mmap;
191 d_strategy_t *d_strategy;
192 dumper_t *d_dump;
193 d_kqfilter_t *d_kqfilter;
194 d_purge_t *d_purge;
195 d_mmap_single_t *d_mmap_single;
196
197 int32_t d_spare0[3];
198 void *d_spare1[3];
199
200 /* These fields should not be messed with by drivers */
201 LIST_HEAD(, cdev) d_devs;
202 int d_spare2;
203 union {
204 struct cdevsw *gianttrick;
205 SLIST_ENTRY(cdevsw) postfree_list;
206 } __d_giant;
207 };
208 #define d_gianttrick __d_giant.gianttrick
209 #define d_postfree_list __d_giant.postfree_list
210
211 struct module;
212
213 struct devsw_module_data {
214 int (*chainevh)(struct module *, int, void *); /* next handler */
215 void *chainarg; /* arg for next event handler */
216 /* Do not initialize fields hereafter */
217 };
218
219 #define DEV_MODULE_ORDERED(name, evh, arg, ord) \
220 static moduledata_t name##_mod = { \
221 #name, \
222 evh, \
223 arg \
224 }; \
225 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, ord)
226
227 #define DEV_MODULE(name, evh, arg) \
228 DEV_MODULE_ORDERED(name, evh, arg, SI_ORDER_MIDDLE)
229
230 void clone_setup(struct clonedevs **cdp);
231 void clone_cleanup(struct clonedevs **);
232 #define CLONE_UNITMASK 0xfffff
233 #define CLONE_FLAG0 (CLONE_UNITMASK + 1)
234 int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev **dev, int extra);
235
236 #define MAKEDEV_REF 0x01
237 #define MAKEDEV_WHTOUT 0x02
238 #define MAKEDEV_NOWAIT 0x04
239 #define MAKEDEV_WAITOK 0x08
240 #define MAKEDEV_ETERNAL 0x10
241 #define MAKEDEV_CHECKNAME 0x20
242 struct make_dev_args {
243 size_t mda_size;
244 int mda_flags;
245 struct cdevsw *mda_devsw;
246 struct ucred *mda_cr;
247 uid_t mda_uid;
248 gid_t mda_gid;
249 int mda_mode;
250 int mda_unit;
251 void *mda_si_drv1;
252 void *mda_si_drv2;
253 };
254 void make_dev_args_init_impl(struct make_dev_args *_args, size_t _sz);
255 #define make_dev_args_init(a) \
256 make_dev_args_init_impl((a), sizeof(struct make_dev_args))
257
258 int count_dev(struct cdev *_dev);
259 void delist_dev(struct cdev *_dev);
260 void destroy_dev(struct cdev *_dev);
261 int destroy_dev_sched(struct cdev *dev);
262 int destroy_dev_sched_cb(struct cdev *dev, void (*cb)(void *), void *arg);
263 void destroy_dev_drain(struct cdevsw *csw);
264 void drain_dev_clone_events(void);
265 struct cdevsw *dev_refthread(struct cdev *_dev, int *_ref);
266 struct cdevsw *devvn_refthread(struct vnode *vp, struct cdev **devp, int *_ref);
267 void dev_relthread(struct cdev *_dev, int _ref);
268 void dev_depends(struct cdev *_pdev, struct cdev *_cdev);
269 void dev_ref(struct cdev *dev);
270 void dev_refl(struct cdev *dev);
271 void dev_rel(struct cdev *dev);
272 struct cdev *make_dev(struct cdevsw *_devsw, int _unit, uid_t _uid, gid_t _gid,
273 int _perms, const char *_fmt, ...) __printflike(6, 7);
274 struct cdev *make_dev_cred(struct cdevsw *_devsw, int _unit,
275 struct ucred *_cr, uid_t _uid, gid_t _gid, int _perms,
276 const char *_fmt, ...) __printflike(7, 8);
277 struct cdev *make_dev_credf(int _flags,
278 struct cdevsw *_devsw, int _unit,
279 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
280 const char *_fmt, ...) __printflike(8, 9);
281 int make_dev_p(int _flags, struct cdev **_cdev, struct cdevsw *_devsw,
282 struct ucred *_cr, uid_t _uid, gid_t _gid, int _mode,
283 const char *_fmt, ...) __printflike(8, 9);
284 int make_dev_s(struct make_dev_args *_args, struct cdev **_cdev,
285 const char *_fmt, ...) __printflike(3, 4);
286 struct cdev *make_dev_alias(struct cdev *_pdev, const char *_fmt, ...)
287 __printflike(2, 3);
288 int make_dev_alias_p(int _flags, struct cdev **_cdev, struct cdev *_pdev,
289 const char *_fmt, ...) __printflike(4, 5);
290 int make_dev_physpath_alias(int _flags, struct cdev **_cdev,
291 struct cdev *_pdev, struct cdev *_old_alias,
292 const char *_physpath);
293 void dev_lock(void);
294 void dev_unlock(void);
295
296 #ifdef KLD_MODULE
297 #define MAKEDEV_ETERNAL_KLD 0
298 #else
299 #define MAKEDEV_ETERNAL_KLD MAKEDEV_ETERNAL
300 #endif
301
302 #define dev2unit(d) ((d)->si_drv0)
303
304 typedef void d_priv_dtor_t(void *data);
305 int devfs_get_cdevpriv(void **datap);
306 int devfs_set_cdevpriv(void *priv, d_priv_dtor_t *dtr);
307 void devfs_clear_cdevpriv(void);
308
309 ino_t devfs_alloc_cdp_inode(void);
310 void devfs_free_cdp_inode(ino_t ino);
311
312 #define UID_ROOT 0
313 #define UID_BIN 3
314 #define UID_UUCP 66
315 #define UID_NOBODY 65534
316
317 #define GID_WHEEL 0
318 #define GID_KMEM 2
319 #define GID_TTY 4
320 #define GID_OPERATOR 5
321 #define GID_BIN 7
322 #define GID_GAMES 13
323 #define GID_VIDEO 44
324 #define GID_DIALER 68
325 #define GID_NOGROUP 65533
326 #define GID_NOBODY 65534
327
328 typedef void (*dev_clone_fn)(void *arg, struct ucred *cred, char *name,
329 int namelen, struct cdev **result);
330
331 int dev_stdclone(char *_name, char **_namep, const char *_stem, int *_unit);
332 EVENTHANDLER_DECLARE(dev_clone, dev_clone_fn);
333
334 /* Stuff relating to kernel-dump */
335 struct kerneldumpcrypto;
336 struct kerneldumpheader;
337
338 struct dumperinfo {
339 dumper_t *dumper; /* Dumping function. */
340 dumper_start_t *dumper_start; /* Dumper callback for dump_start(). */
341 dumper_hdr_t *dumper_hdr; /* Dumper callback for writing headers. */
342 void *priv; /* Private parts. */
343 u_int blocksize; /* Size of block in bytes. */
344 u_int maxiosize; /* Max size allowed for an individual I/O */
345 off_t mediaoffset; /* Initial offset in bytes. */
346 off_t mediasize; /* Space available in bytes. */
347
348 /* MI kernel dump state. */
349 void *blockbuf; /* Buffer for padding shorter dump blocks */
350 off_t dumpoff; /* Offset of ongoing kernel dump. */
351 off_t origdumpoff; /* Starting dump offset. */
352 struct kerneldumpcrypto *kdcrypto; /* Kernel dump crypto. */
353 struct kerneldumpcomp *kdcomp; /* Kernel dump compression. */
354 };
355
356 extern int dumping; /* system is dumping */
357
358 int doadump(boolean_t);
359 int set_dumper(struct dumperinfo *di, const char *devname, struct thread *td,
360 uint8_t compression, uint8_t encryption, const uint8_t *key,
361 uint32_t encryptedkeysize, const uint8_t *encryptedkey);
362 int clear_dumper(struct thread *td);
363
364 int dump_start(struct dumperinfo *di, struct kerneldumpheader *kdh);
365 int dump_append(struct dumperinfo *, void *, vm_offset_t, size_t);
366 int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t);
367 int dump_finish(struct dumperinfo *di, struct kerneldumpheader *kdh);
368 void dump_init_header(const struct dumperinfo *di, struct kerneldumpheader *kdh,
369 char *magic, uint32_t archver, uint64_t dumplen);
370
371 #endif /* _KERNEL */
372
373 #endif /* !_SYS_CONF_H_ */
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