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