geom_int.h revision 113927 
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 113927 2003-04-23 19:34:38Z 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 * 32	G_T_DETAILS
52 */
53#define G_F_DISKIOCTL	64
54#define G_F_CTLDUMP	128
55
56
57/*
58 * Various internal actions are tracked by tagging g_event[s] onto
59 * an internal eventqueue.
60 */
61enum g_events {
62	EV_NEW_PROVIDER,	/* provider */
63	EV_SPOILED,		/* provider, consumer */
64	EV_CALL_ME,		/* func, arg */
65	EV_LAST
66};
67
68#define G_N_EVENTREFS		20
69
70struct g_event {
71	enum g_events 		event;
72	TAILQ_ENTRY(g_event)	events;
73	void			*arg;
74	g_call_me_t		*func;
75	void			*ref[G_N_EVENTREFS];
76};
77
78/*
79 * We actually have a number of drivers sharing the same major number
80 * so we coordinate the major/minor usage here
81 */
82#define GEOM_MAJOR		4
83#define GEOM_MINOR_STATS	0
84#define GEOM_MINOR_PROVIDERS	10
85
86/* geom_dump.c */
87void g_confxml(void *, int flag);
88void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
89void g_confdot(void *, int flag);
90void g_conftxt(void *, int flag);
91
92/* geom_event.c */
93void g_event_init(void);
94void g_post_event(enum g_events ev, ...);
95void g_run_events(void);
96void g_stall_events(void);
97void g_release_events(void);
98
99/* geom_subr.c */
100extern struct class_list_head g_classes;
101extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
102
103/* geom_io.c */
104void g_io_init(void);
105void g_io_schedule_down(struct thread *tp);
106void g_io_schedule_up(struct thread *tp);
107
108/* geom_kern.c / geom_kernsim.c */
109void g_init(void);
110extern int g_shutdown;
111
112/* geom_ctl.c */
113void g_ctl_init(void);
114