geom_kern.c revision 93248
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_kern.c 93248 2002-03-26 21:40:06Z phk $ 36 */ 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/kernel.h> 41#include <sys/malloc.h> 42#include <sys/bio.h> 43#include <sys/sysctl.h> 44#include <sys/proc.h> 45#include <sys/kthread.h> 46#include <sys/lock.h> 47#include <sys/mutex.h> 48#include <sys/sx.h> 49#include <sys/sbuf.h> 50#include <sys/errno.h> 51#include <geom/geom.h> 52 53MALLOC_DEFINE(M_GEOM, "GEOM", "Geom data structures"); 54 55struct sx topology_lock; 56 57static struct proc *g_up_proc; 58 59int g_debugflags; 60 61static void 62g_up_procbody(void) 63{ 64 struct proc *p = g_up_proc; 65 struct thread *tp = &p->p_xxthread; 66 67 curthread->td_base_pri = PRIBIO; 68 for(;;) { 69 g_io_schedule_up(tp); 70 mtx_lock(&Giant); 71 tsleep(&g_wait_up, PRIBIO, "g_up", hz/10); 72 mtx_unlock(&Giant); 73 } 74} 75 76struct kproc_desc g_up_kp = { 77 "g_up", 78 g_up_procbody, 79 &g_up_proc, 80}; 81 82static struct proc *g_down_proc; 83 84static void 85g_down_procbody(void) 86{ 87 struct proc *p = g_down_proc; 88 struct thread *tp = &p->p_xxthread; 89 90 curthread->td_base_pri = PRIBIO; 91 for(;;) { 92 g_io_schedule_down(tp); 93 mtx_lock(&Giant); 94 tsleep(&g_wait_down, PRIBIO, "g_down", hz/10); 95 mtx_unlock(&Giant); 96 } 97} 98 99struct kproc_desc g_down_kp = { 100 "g_down", 101 g_down_procbody, 102 &g_down_proc, 103}; 104 105static struct proc *g_event_proc; 106 107static void 108g_event_procbody(void) 109{ 110 struct proc *p = g_event_proc; 111 struct thread *tp = &p->p_xxthread; 112 113 curthread->td_base_pri = PRIBIO; 114 for(;;) { 115 g_run_events(tp); 116 mtx_lock(&Giant); 117 tsleep(&g_wait_event, PRIBIO, "g_events", hz/10); 118 mtx_unlock(&Giant); 119 } 120} 121 122struct kproc_desc g_event_kp = { 123 "g_event", 124 g_event_procbody, 125 &g_event_proc, 126}; 127 128void 129g_init(void) 130{ 131 printf("Initializing GEOMetry subsystem\n"); 132 if (bootverbose) 133 g_debugflags |= G_T_TOPOLOGY; 134 sx_init(&topology_lock, "GEOM topology"); 135 g_io_init(); 136 g_event_init(); 137 mtx_lock(&Giant); 138 kproc_start(&g_event_kp); 139 kproc_start(&g_up_kp); 140 kproc_start(&g_down_kp); 141 mtx_unlock(&Giant); 142} 143 144static int 145sysctl_debug_geomdot(SYSCTL_HANDLER_ARGS) 146{ 147 int i, error; 148 struct sbuf *sb; 149 150 i = 0; 151 sb = g_confdot(); 152 error = sysctl_handle_opaque(oidp, sbuf_data(sb), sbuf_len(sb), req); 153 sbuf_delete(sb); 154 return (error); 155} 156 157SYSCTL_PROC(_debug, OID_AUTO, geomdot, CTLTYPE_STRING|CTLFLAG_RD, 158 0, 0, sysctl_debug_geomdot, "A", 159 "Dump the GEOM config"); 160 161static int 162sysctl_debug_geomconf(SYSCTL_HANDLER_ARGS) 163{ 164 int i, error; 165 struct sbuf *sb; 166 167 i = 0; 168 sb = g_conf(); 169 error = sysctl_handle_opaque(oidp, sbuf_data(sb), sbuf_len(sb), req); 170 sbuf_delete(sb); 171 return (error); 172} 173 174SYSCTL_PROC(_debug, OID_AUTO, geomconf, CTLTYPE_STRING|CTLFLAG_RD, 175 0, 0, sysctl_debug_geomconf, "A", 176 "Dump the GEOM config"); 177 178SYSCTL_INT(_debug, OID_AUTO, geomdebugflags, CTLTYPE_INT|CTLFLAG_RW, 179 &g_debugflags, 0, ""); 180 181SYSCTL_INT(_debug_sizeof, OID_AUTO, g_class, CTLTYPE_INT|CTLFLAG_RD, 182 0, sizeof(struct g_class), ""); 183SYSCTL_INT(_debug_sizeof, OID_AUTO, g_geom, CTLTYPE_INT|CTLFLAG_RD, 184 0, sizeof(struct g_geom), ""); 185SYSCTL_INT(_debug_sizeof, OID_AUTO, g_provider, CTLTYPE_INT|CTLFLAG_RD, 186 0, sizeof(struct g_provider), ""); 187SYSCTL_INT(_debug_sizeof, OID_AUTO, g_consumer, CTLTYPE_INT|CTLFLAG_RD, 188 0, sizeof(struct g_consumer), ""); 189SYSCTL_INT(_debug_sizeof, OID_AUTO, g_bioq, CTLTYPE_INT|CTLFLAG_RD, 190 0, sizeof(struct g_bioq), ""); 191SYSCTL_INT(_debug_sizeof, OID_AUTO, g_event, CTLTYPE_INT|CTLFLAG_RD, 192 0, sizeof(struct g_event), ""); 193