geom_int.h revision 112370 
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 112370 2003-03-18 09:42:33Z 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/*
46 * 1	G_T_TOPOLOGY
47 * 2	G_T_BIO
48 * 4	G_T_ACCESS
49 * 8	enable sanity checks
50 * 16	Allow footshooting on rank#1 providers
51 */
52
53/*
54 * Various internal actions are tracked by tagging g_event[s] onto
55 * an internal eventqueue.
56 */
57enum g_events {
58	EV_NEW_CLASS,		/* class */
59	EV_NEW_PROVIDER,	/* provider */
60	EV_SPOILED,		/* provider, consumer */
61	EV_CALL_ME,		/* func, arg */
62	EV_LAST
63};
64
65struct g_event {
66	enum g_events 		event;
67	TAILQ_ENTRY(g_event)	events;
68	struct g_class		*class;
69	struct g_geom		*geom;
70	struct g_provider	*provider;
71	struct g_consumer	*consumer;
72	void			*arg;
73	g_call_me_t		*func;
74};
75
76/*
77 * We actually have a number of drivers sharing the same major number
78 * so we coordinate the major/minor usage here
79 */
80#define GEOM_MAJOR		4
81#define GEOM_MINOR_STATS	0
82#define GEOM_MINOR_PROVIDERS	10
83
84/* geom_dump.c */
85void g_confxml(void *);
86void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
87void g_confdot(void *);
88void g_conftxt(void *);
89
90/* geom_event.c */
91void g_event_init(void);
92void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
93void g_run_events(void);
94
95/* geom_subr.c */
96extern struct class_list_head g_classes;
97extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
98
99/* geom_io.c */
100void g_io_init(void);
101void g_io_schedule_down(struct thread *tp);
102void g_io_schedule_up(struct thread *tp);
103
104/* geom_kern.c / geom_kernsim.c */
105void g_init(void);
106