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115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/*-
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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LIST_HEAD(class_list_head, g_class);
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TAILQ_HEAD(g_tailq_head, g_geom);
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TAILQ_HEAD(event_tailq_head, g_event);
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extern struct event_tailq_head events;
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extern int g_collectstats;
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extern int g_debugflags;
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/*
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* 1 G_T_TOPOLOGY
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* 2 G_T_BIO
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* 4 G_T_ACCESS
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* 8 Enable sanity checks
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* 16 Allow footshooting on rank#1 providers
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* 32 G_T_DETAILS
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*/
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#define G_F_DISKIOCTL 64
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/*
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* Various internal actions are tracked by tagging g_event[s] onto
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* an internal eventqueue.
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*/
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enum g_events {
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EV_NEW_CLASS, /* class */
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EV_NEW_PROVIDER, /* provider */
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EV_SPOILED, /* provider, consumer */
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EV_CALL_ME, /* func, arg */
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EV_LAST
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};
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struct g_event {
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enum g_events event;
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TAILQ_ENTRY(g_event) events;
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struct g_class *class;
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struct g_geom *geom;
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struct g_provider *provider;
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struct g_consumer *consumer;
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void *arg;
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g_call_me_t *func;
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};
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/*
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* We actually have a number of drivers sharing the same major number
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* so we coordinate the major/minor usage here
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*/
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#define GEOM_MAJOR 4
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#define GEOM_MINOR_STATS 0
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#define GEOM_MINOR_PROVIDERS 10
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/* geom_dump.c */
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void g_confxml(void *);
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void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
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void g_confdot(void *);
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void g_conftxt(void *);
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/* geom_event.c */
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void g_event_init(void);
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void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
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void g_cancel_event(struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
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void g_run_events(void);
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void g_stall_events(void);
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void g_release_events(void);
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/* geom_subr.c */
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extern struct class_list_head g_classes;
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extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
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/* geom_io.c */
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void g_io_init(void);
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void g_io_schedule_down(struct thread *tp);
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void g_io_schedule_up(struct thread *tp);
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/* geom_kern.c / geom_kernsim.c */
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void g_init(void);
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/* geom_ctl.c */
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void g_ctl_init(void);
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