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 * $FreeBSD$ 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_collectstats; 44 extern 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 55 56 /* 57 * Various internal actions are tracked by tagging g_event[s] onto 58 * an internal eventqueue. 59 */ 60 enum g_events { 61 EV_NEW_CLASS, /* class */ 62 EV_NEW_PROVIDER, /* provider */ 63 EV_SPOILED, /* provider, consumer */ 64 EV_CALL_ME, /* func, arg */ 65 EV_LAST 66 }; 67 68 struct g_event { 69 enum g_events event; 70 TAILQ_ENTRY(g_event) events; 71 struct g_class *class; 72 struct g_geom *geom; 73 struct g_provider *provider; 74 struct g_consumer *consumer; 75 void *arg; 76 g_call_me_t *func; 77 }; 78 79 /* 80 * We actually have a number of drivers sharing the same major number 81 * so we coordinate the major/minor usage here 82 */ 83 #define GEOM_MAJOR 4 84 #define GEOM_MINOR_STATS 0 85 #define GEOM_MINOR_PROVIDERS 10 86 87 /* geom_dump.c */ 88 void g_confxml(void *); 89 void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp); 90 void g_confdot(void *); 91 void g_conftxt(void *); 92 93 /* geom_event.c */ 94 void g_event_init(void); 95 void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp); 96 void g_cancel_event(struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp); 97 void g_run_events(void); 98 void g_stall_events(void); 99 void g_release_events(void); 100 101 /* geom_subr.c */ 102 extern struct class_list_head g_classes; 103 extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down; 104 105 /* geom_io.c */ 106 void g_io_init(void); 107 void g_io_schedule_down(struct thread *tp); 108 void g_io_schedule_up(struct thread *tp); 109 110 /* geom_kern.c / geom_kernsim.c */ 111 void g_init(void); 112 113 /* geom_ctl.c */ 114 void g_ctl_init(void); 115