The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_int.h

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    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: releng/5.0/sys/geom/geom_int.h 106101 2002-10-28 22:43:54Z phk $
   36  */
   37 
   38 LIST_HEAD(class_list_head, g_class);
   39 TAILQ_HEAD(g_tailq_head, g_geom);
   40 TAILQ_HEAD(event_tailq_head, g_event);
   41 
   42 extern struct event_tailq_head events;
   43 extern int g_debugflags;
   44 /* 1    G_T_TOPOLOGY            */
   45 /* 2    G_T_BIO                 */
   46 /* 4    G_T_ACCESS              */
   47 /* 8    enable sanity checks    */
   48 
   49 /*
   50  * Various internal actions are tracked by tagging g_event[s] onto
   51  * an internal eventqueue.
   52  */
   53 enum g_events {
   54         EV_NEW_CLASS,           /* class */
   55         EV_NEW_PROVIDER,        /* provider */
   56         EV_SPOILED,             /* provider, consumer */
   57         EV_CALL_ME,             /* func, arg */
   58         EV_LAST
   59 };
   60 
   61 struct g_event {
   62         enum g_events           event;
   63         TAILQ_ENTRY(g_event)    events;
   64         struct g_class          *class;
   65         struct g_geom           *geom;
   66         struct g_provider       *provider;
   67         struct g_consumer       *consumer;
   68         void                    *arg;
   69         g_call_me_t             *func;
   70 };
   71 
   72 /* geom_dump.c */
   73 void g_confxml(void *);
   74 void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
   75 void g_confdot(void *);
   76 void g_conftxt(void *);
   77 
   78 
   79 /* geom_event.c */
   80 void g_event_init(void);
   81 void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);
   82 void g_run_events(void);
   83 
   84 /* geom_subr.c */
   85 extern struct class_list_head g_classes;
   86 extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down;
   87 
   88 /* geom_io.c */
   89 void g_io_init(void);
   90 void g_io_schedule_down(struct thread *tp);
   91 void g_io_schedule_up(struct thread *tp);
   92 
   93 /* geom_kern.c / geom_kernsim.c */
   94 void g_init(void);

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