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38 * @(#)conf.h 8.5 (Berkeley) 1/9/95
39 * $FreeBSD: src/sys/sys/conf.h,v 1.103.2.6 2002/03/11 01:14:55 dd Exp $
40 * $DragonFly: src/sys/sys/conf.h,v 1.5 2003/07/22 17:03:34 dillon Exp $
46 #include <sys/queue.h>
48 #define SPECNAMELEN 15
57 LIST_ENTRY(specinfo) si_hash;
58 SLIST_HEAD(, vnode) si_hlist;
59 char si_name[SPECNAMELEN + 1];
62 struct cdevsw *si_devsw; /* cached */
63 int si_iosize_max; /* maximum I/O size (for physio &al) */
66 struct tty *__sit_tty;
69 struct disk *__sid_disk;
70 struct mount *__sid_mountpoint;
71 int __sid_bsize_phys; /* min physical block size */
72 int __sid_bsize_best; /* optimal block size */
77 #define SI_STASHED 0x0001 /* created in stashed storage */
79 #define si_tty __si_u.__si_tty.__sit_tty
80 #define si_disk __si_u.__si_disk.__sid_disk
81 #define si_mountpoint __si_u.__si_disk.__sid_mountpoint
82 #define si_bsize_phys __si_u.__si_disk.__sid_bsize_phys
83 #define si_bsize_best __si_u.__si_disk.__sid_bsize_best
88 #define v_hashchain v_rdev->si_hlist
89 #define v_specmountpoint v_rdev->si_mountpoint
92 * Special device management
95 #define SPECHASH(rdev) (((unsigned)(minor(rdev)))%SPECHSZ)
98 * Definitions of device driver entry switches
107 * Note: d_thread_t is provided as a transition aid for those drivers
108 * that treat struct proc/struct thread as an opaque data type and
109 * exist in substantially the same form in both 4.x and 5.x. Writers
110 * of drivers that dips into the d_thread_t structure should use
111 * struct thread or struct proc as appropriate for the version of the
112 * OS they are using. It is provided in lieu of each device driver
113 * inventing its own way of doing this. While it does violate style(9)
114 * in a number of ways, this violation is deemed to be less
115 * important than the benefits that a uniform API between releases
118 * Users of struct thread/struct proc that aren't device drivers should
119 * not use d_thread_t.
125 typedef struct thread d_thread_t;
126 typedef int d_open_t (dev_t dev, int oflags, int devtype, d_thread_t *td);
127 typedef int d_close_t (dev_t dev, int fflag, int devtype, d_thread_t *td);
128 typedef void d_strategy_t (struct buf *bp);
129 typedef int d_ioctl_t (dev_t dev, u_long cmd, caddr_t data,
130 int fflag, d_thread_t *td);
131 typedef int d_dump_t (dev_t dev);
132 typedef int d_psize_t (dev_t dev);
134 typedef int d_read_t (dev_t dev, struct uio *uio, int ioflag);
135 typedef int d_write_t (dev_t dev, struct uio *uio, int ioflag);
136 typedef int d_poll_t (dev_t dev, int events, d_thread_t *td);
137 typedef int d_kqfilter_t (dev_t dev, struct knote *kn);
138 typedef int d_mmap_t (dev_t dev, vm_offset_t offset, int nprot);
140 typedef int l_open_t (dev_t dev, struct tty *tp);
141 typedef int l_close_t (struct tty *tp, int flag);
142 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag);
143 typedef int l_write_t (struct tty *tp, struct uio *uio, int flag);
144 typedef int l_ioctl_t (struct tty *tp, u_long cmd, caddr_t data,
145 int flag, d_thread_t *td);
146 typedef int l_rint_t (int c, struct tty *tp);
147 typedef int l_start_t (struct tty *tp);
148 typedef int l_modem_t (struct tty *tp, int flag);
151 * XXX: The dummy argument can be used to do what strategy1() never
152 * did anywhere: Create a per device flag to lock the device during
153 * label/slice surgery, all calls with a dummy == 0 gets stalled on
154 * a queue somewhere, whereas dummy == 1 are let through. Once out
155 * of surgery, reset the flag and restart all the stuff on the stall
158 #define BUF_STRATEGY(bp, dummy) dev_dstrategy((bp)->b_dev, bp)
162 #define D_TAPE 0x0001
163 #define D_DISK 0x0002
167 #define D_TYPEMASK 0xffff
172 #define D_MEMDISK 0x00010000 /* memory type disk */
173 #define D_NAGGED 0x00020000 /* nagged about missing make_dev() */
174 #define D_CANFREE 0x00040000 /* can free blocks */
175 #define D_TRACKCLOSE 0x00080000 /* track all closes */
176 #define D_MASTER 0x00100000 /* used by pty/tty code */
177 #define D_KQFILTER 0x00200000 /* has kqfilter entry */
180 * Character device switch table
183 const char *d_name; /* base device name, e.g. 'vn' */
184 int d_maj; /* major (char) device number */
185 u_int d_flags; /* D_ flags */
186 struct lwkt_port *d_port; /* port (template only) */
187 u_int d_autoq; /* thread safe (old style) vec mask */
190 * Old style vectors are used only if d_port is NULL when the cdevsw
191 * is added to the system. They have been renamed to prevent misuse.
194 d_close_t *old_close;
196 d_write_t *old_write;
197 d_ioctl_t *old_ioctl;
200 d_strategy_t *old_strategy;
202 d_psize_t *old_psize;
203 d_kqfilter_t *old_kqfilter;
207 * Line discipline switch table
222 extern struct linesw linesw[];
225 int ldisc_register (int , struct linesw *);
226 void ldisc_deregister (int);
227 #define LDISC_LOAD -1 /* Loadable line discipline */
234 udev_t sw_dev; /* For quasibogus swapdev reporting */
240 #define SW_FREED 0x01
241 #define SW_SEQUENTIAL 0x02
242 #define sw_freed sw_flags /* XXX compat */
251 d_kqfilter_t nokqfilter;
252 #define nostrategy ((d_strategy_t *)NULL)
253 #define nopoll seltrue
257 #define NUMCDEVSW 256
260 * nopsize is little used, so not worth having dummy functions for.
262 #define nopsize ((d_psize_t *)NULL)
267 l_ioctl_t l_nullioctl;
273 struct devsw_module_data {
274 int (*chainevh)(struct module *, int, void *); /* next handler */
275 void *chainarg; /* arg for next event handler */
276 /* Do not initialize fields hereafter */
279 #define DEV_MODULE(name, evh, arg) \
280 static moduledata_t name##_mod = { \
285 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
287 void compile_devsw(struct cdevsw *devsw);
288 int cdevsw_add (struct cdevsw *new);
289 struct lwkt_port *cdevsw_add_override (struct cdevsw *new, struct lwkt_port *port);
290 struct lwkt_port *cdevsw_dev_override(dev_t dev, struct lwkt_port *port);
292 int cdevsw_remove (struct cdevsw *old);
293 int count_dev (dev_t dev);
294 void destroy_dev (dev_t dev);
295 struct cdevsw *devsw (dev_t dev);
296 const char *devtoname (dev_t dev);
297 void freedev (dev_t dev);
298 int iszerodev (dev_t dev);
299 dev_t make_dev (struct cdevsw *devsw, int minor, uid_t uid, gid_t gid, int perms, const char *fmt, ...) __printflike(6, 7);
300 int lminor (dev_t dev);
302 dev_t getdiskbyname(char *name);
305 * XXX: This included for when DEVFS resurfaces
314 #define GID_OPERATOR 5
317 #define GID_DIALER 68
321 #endif /* !_SYS_CONF_H_ */