geom_int.h revision 110540 
178344Sobrien/*-
278344Sobrien * Copyright (c) 2002 Poul-Henning Kamp
398184Sgordon * Copyright (c) 2002 Networks Associates Technology, Inc.
478344Sobrien * All rights reserved.
578344Sobrien *
678344Sobrien * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7193197Sdougb * and NAI Labs, the Security Research Division of Network Associates, Inc.
898184Sgordon * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9180564Sdougb * DARPA CHATS research program.
1078344Sobrien *
1178344Sobrien * Redistribution and use in source and binary forms, with or without
1278344Sobrien * modification, are permitted provided that the following conditions
1378344Sobrien * are met:
1498184Sgordon * 1. Redistributions of source code must retain the above copyright
1598585Sdougb *    notice, this list of conditions and the following disclaimer.
16124618Smtm * 2. Redistributions in binary form must reproduce the above copyright
17124618Smtm *    notice, this list of conditions and the following disclaimer in the
18163487Sflz *    documentation and/or other materials provided with the distribution.
1978344Sobrien * 3. The names of the authors may not be used to endorse or promote
20104980Sschweikh *    products derived from this software without specific prior written
2198184Sgordon *    permission.
22124618Smtm *
23124618Smtm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24124618Smtm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2598486Sdougb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26124618Smtm * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27124618Smtm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28124618Smtm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29124618Smtm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30124618Smtm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3198184Sgordon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32124618Smtm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33124618Smtm * SUCH DAMAGE.
34124618Smtm *
35124618Smtm * $FreeBSD: head/sys/geom/geom_int.h 110540 2003-02-08 12:30:12Z phk $
36172822Smtm */
37124618Smtm
38124618SmtmLIST_HEAD(class_list_head, g_class);
3998184SgordonTAILQ_HEAD(g_tailq_head, g_geom);
40124618SmtmTAILQ_HEAD(event_tailq_head, g_event);
41124618Smtm
42124618Smtmextern struct event_tailq_head events;
43124618Smtmextern int g_collectstats;
44124618Smtmextern int g_debugflags;
45124618Smtm/* 1	G_T_TOPOLOGY		*/
4698184Sgordon/* 2	G_T_BIO			*/
47124618Smtm/* 4	G_T_ACCESS		*/
48172822Smtm/* 8	enable sanity checks	*/
49172977Smtm
50124618Smtm/*
5198184Sgordon * Various internal actions are tracked by tagging g_event[s] onto
5298184Sgordon * an internal eventqueue.
5398184Sgordon */
5498184Sgordonenum g_events {
5598184Sgordon	EV_NEW_CLASS,		/* class */
5678344Sobrien	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