geom_int.h revision 110541 
1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD: head/sys/geom/geom_int.h 110541 2003-02-08 13:03:57Z phk $
36 */
37
38LIST_HEAD(class_list_head, g_class);
39TAILQ_HEAD(g_tailq_head, g_geom);
40TAILQ_HEAD(event_tailq_head, g_event);
41
42extern struct event_tailq_head events;
43extern int g_collectstats;
44extern int g_debugflags;
45/* 1	G_T_TOPOLOGY		*/
46/* 2	G_T_BIO			*/
47/* 4	G_T_ACCESS		*/
48/* 8	enable sanity checks	*/
49
50/*
51 * Various internal actions are tracked by tagging g_event[s] onto
52 * an internal eventqueue.
53 */
54enum g_events {
55	EV_NEW_CLASS,		/* class */
56	EV_NEW_PROVIDER,	/* provider */
57	EV_SPOILED,		/* provider, consumer */
58	EV_CALL_ME,		/* func, arg */
59	EV_LAST
60};
61
62struct g_event {
63	enum g_events 		event;
64	TAILQ_ENTRY(g_event)	events;
65	struct g_class		*class;
66	struct g_geom		*geom;
67	struct g_provider	*provider;
68	struct g_consumer	*consumer;
69	void			*arg;
70	g_call_me_t		*func;
71};
72
73/*
74 * We actually have a number of drivers sharing the same major number
75 * so we coordinate the major/minor usage here
76 */
77#define GEOM_MAJOR		4
78#define GEOM_MINOR_STATS	0
79#define GEOM_MINOR_PROVIDERS	10
80
81/* geom_dump.c */
82void g_confxml(void *);
83void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
84void g_confdot(void *);
85void g_conftxt(void *);
86
87/* geom_event.c */
88void g_event_init(void);
89void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
90void g_run_events(void);
91
92/* geom_subr.c */
93extern struct class_list_head g_classes;
94extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
95
96/* geom_io.c */
97void g_io_init(void);
98void g_io_schedule_down(struct thread *tp);
99void g_io_schedule_up(struct thread *tp);
100
101/* geom_kern.c / geom_kernsim.c */
102void g_init(void);
103
104/* geom_stats.c */
105void g_stat_init(void);
106struct g_stat *g_stat_new(void *id);
107void g_stat_delete(struct g_stat *);
108