Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/kern/init_sysctl_base.c
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1 /* $NetBSD: init_sysctl_base.c,v 1.8 2017/10/31 12:37:23 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2003, 2007, 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Brown, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: init_sysctl_base.c,v 1.8 2017/10/31 12:37:23 martin Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/sysctl.h> 38 #include <sys/proc.h> 39 #include <sys/cpu.h> 40 #include <sys/kernel.h> 41 #include <sys/disklabel.h> 42 43 static int sysctl_setlen(SYSCTLFN_PROTO); 44 45 /* 46 * sets up the base nodes... 47 */ 48 void 49 sysctl_basenode_init(void) 50 { 51 52 sysctl_createv(NULL, 0, NULL, NULL, 53 CTLFLAG_PERMANENT, 54 CTLTYPE_NODE, "kern", 55 SYSCTL_DESCR("High kernel"), 56 NULL, 0, NULL, 0, 57 CTL_KERN, CTL_EOL); 58 sysctl_createv(NULL, 0, NULL, NULL, 59 CTLFLAG_PERMANENT, 60 CTLTYPE_NODE, "vm", 61 SYSCTL_DESCR("Virtual memory"), 62 NULL, 0, NULL, 0, 63 CTL_VM, CTL_EOL); 64 sysctl_createv(NULL, 0, NULL, NULL, 65 CTLFLAG_PERMANENT, 66 CTLTYPE_NODE, "vfs", 67 SYSCTL_DESCR("Filesystem"), 68 NULL, 0, NULL, 0, 69 CTL_VFS, CTL_EOL); 70 sysctl_createv(NULL, 0, NULL, NULL, 71 CTLFLAG_PERMANENT, 72 CTLTYPE_NODE, "net", 73 SYSCTL_DESCR("Networking"), 74 NULL, 0, NULL, 0, 75 CTL_NET, CTL_EOL); 76 sysctl_createv(NULL, 0, NULL, NULL, 77 CTLFLAG_PERMANENT, 78 CTLTYPE_NODE, "debug", 79 SYSCTL_DESCR("Debugging"), 80 NULL, 0, NULL, 0, 81 CTL_DEBUG, CTL_EOL); 82 sysctl_createv(NULL, 0, NULL, NULL, 83 CTLFLAG_PERMANENT, 84 CTLTYPE_NODE, "hw", 85 SYSCTL_DESCR("Generic CPU, I/O"), 86 NULL, 0, NULL, 0, 87 CTL_HW, CTL_EOL); 88 sysctl_createv(NULL, 0, NULL, NULL, 89 CTLFLAG_PERMANENT, 90 CTLTYPE_NODE, "machdep", 91 SYSCTL_DESCR("Machine dependent"), 92 NULL, 0, NULL, 0, 93 CTL_MACHDEP, CTL_EOL); 94 /* 95 * this node is inserted so that the sysctl nodes in libc can 96 * operate. 97 */ 98 sysctl_createv(NULL, 0, NULL, NULL, 99 CTLFLAG_PERMANENT, 100 CTLTYPE_NODE, "user", 101 SYSCTL_DESCR("User-level"), 102 NULL, 0, NULL, 0, 103 CTL_USER, CTL_EOL); 104 sysctl_createv(NULL, 0, NULL, NULL, 105 CTLFLAG_PERMANENT, 106 CTLTYPE_NODE, "ddb", 107 SYSCTL_DESCR("In-kernel debugger"), 108 NULL, 0, NULL, 0, 109 CTL_DDB, CTL_EOL); 110 sysctl_createv(NULL, 0, NULL, NULL, 111 CTLFLAG_PERMANENT, 112 CTLTYPE_NODE, "proc", 113 SYSCTL_DESCR("Per-process"), 114 NULL, 0, NULL, 0, 115 CTL_PROC, CTL_EOL); 116 sysctl_createv(NULL, 0, NULL, NULL, 117 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 118 CTLTYPE_NODE, "vendor", 119 SYSCTL_DESCR("Vendor specific"), 120 NULL, 0, NULL, 0, 121 CTL_VENDOR, CTL_EOL); 122 sysctl_createv(NULL, 0, NULL, NULL, 123 CTLFLAG_PERMANENT, 124 CTLTYPE_NODE, "emul", 125 SYSCTL_DESCR("Emulation settings"), 126 NULL, 0, NULL, 0, 127 CTL_EMUL, CTL_EOL); 128 sysctl_createv(NULL, 0, NULL, NULL, 129 CTLFLAG_PERMANENT, 130 CTLTYPE_NODE, "security", 131 SYSCTL_DESCR("Security"), 132 NULL, 0, NULL, 0, 133 CTL_SECURITY, CTL_EOL); 134 } 135 136 /* 137 * now add some nodes which both rump kernel and standard 138 * NetBSD both need, as rump cannot use sys/kern/init_sysctl.c 139 */ 140 SYSCTL_SETUP(sysctl_kernbase_setup, "sysctl kern subtree base setup") 141 { 142 143 sysctl_createv(clog, 0, NULL, NULL, 144 CTLFLAG_PERMANENT, 145 CTLTYPE_STRING, "ostype", 146 SYSCTL_DESCR("Operating system type"), 147 NULL, 0, __UNCONST(&ostype), 0, 148 CTL_KERN, KERN_OSTYPE, CTL_EOL); 149 sysctl_createv(clog, 0, NULL, NULL, 150 CTLFLAG_PERMANENT, 151 CTLTYPE_STRING, "osrelease", 152 SYSCTL_DESCR("Operating system release"), 153 NULL, 0, __UNCONST(&osrelease), 0, 154 CTL_KERN, KERN_OSRELEASE, CTL_EOL); 155 sysctl_createv(clog, 0, NULL, NULL, 156 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 157 CTLTYPE_INT, "osrevision", 158 SYSCTL_DESCR("Operating system revision"), 159 NULL, __NetBSD_Version__, NULL, 0, 160 CTL_KERN, KERN_OSREV, CTL_EOL); 161 sysctl_createv(clog, 0, NULL, NULL, 162 CTLFLAG_PERMANENT, 163 CTLTYPE_STRING, "version", 164 SYSCTL_DESCR("Kernel version"), 165 NULL, 0, __UNCONST(&version), 0, 166 CTL_KERN, KERN_VERSION, CTL_EOL); 167 sysctl_createv(clog, 0, NULL, NULL, 168 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 169 CTLTYPE_STRING, "hostname", 170 SYSCTL_DESCR("System hostname"), 171 sysctl_setlen, 0, hostname, MAXHOSTNAMELEN, 172 CTL_KERN, KERN_HOSTNAME, CTL_EOL); 173 sysctl_createv(clog, 0, NULL, NULL, 174 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 175 CTLTYPE_STRING, "domainname", 176 SYSCTL_DESCR("YP domain name"), 177 sysctl_setlen, 0, domainname, MAXHOSTNAMELEN, 178 CTL_KERN, KERN_DOMAINNAME, CTL_EOL); 179 sysctl_createv(clog, 0, NULL, NULL, 180 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 181 CTLTYPE_INT, "rawpartition", 182 SYSCTL_DESCR("Raw partition of a disk"), 183 NULL, RAW_PART, NULL, 0, 184 CTL_KERN, KERN_RAWPARTITION, CTL_EOL); 185 } 186 187 static int 188 sysctl_hw_machine_arch(SYSCTLFN_ARGS) 189 { 190 struct sysctlnode node = *rnode; 191 #ifndef PROC_MACHINE_ARCH 192 #define PROC_MACHINE_ARCH(P) machine_arch 193 #endif 194 195 node.sysctl_data = PROC_MACHINE_ARCH(l->l_proc); 196 node.sysctl_size = strlen(node.sysctl_data) + 1; 197 return sysctl_lookup(SYSCTLFN_CALL(&node)); 198 } 199 200 SYSCTL_SETUP(sysctl_hwbase_setup, "sysctl hw subtree base setup") 201 { 202 u_int u; 203 u_quad_t q; 204 const char *model = cpu_getmodel(); 205 206 sysctl_createv(clog, 0, NULL, NULL, 207 CTLFLAG_PERMANENT, 208 CTLTYPE_STRING, "model", 209 SYSCTL_DESCR("Machine model"), 210 NULL, 0, __UNCONST(model), 0, 211 CTL_HW, HW_MODEL, CTL_EOL); 212 sysctl_createv(clog, 0, NULL, NULL, 213 CTLFLAG_PERMANENT, 214 CTLTYPE_STRING, "machine", 215 SYSCTL_DESCR("Machine class"), 216 NULL, 0, machine, 0, 217 CTL_HW, HW_MACHINE, CTL_EOL); 218 sysctl_createv(clog, 0, NULL, NULL, 219 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 220 CTLTYPE_STRING, "machine_arch", 221 SYSCTL_DESCR("Machine CPU class"), 222 sysctl_hw_machine_arch, 0, NULL, 0, 223 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 224 sysctl_createv(clog, 0, NULL, NULL, 225 CTLFLAG_PERMANENT, 226 CTLTYPE_INT, "ncpu", 227 SYSCTL_DESCR("Number of CPUs configured"), 228 NULL, 0, &ncpu, 0, 229 CTL_HW, HW_NCPU, CTL_EOL); 230 sysctl_createv(clog, 0, NULL, NULL, 231 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 232 CTLTYPE_INT, "byteorder", 233 SYSCTL_DESCR("System byte order"), 234 NULL, BYTE_ORDER, NULL, 0, 235 CTL_HW, HW_BYTEORDER, CTL_EOL); 236 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 237 UINT_MAX : physmem * PAGE_SIZE; 238 sysctl_createv(clog, 0, NULL, NULL, 239 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 240 CTLTYPE_INT, "physmem", 241 SYSCTL_DESCR("Bytes of physical memory"), 242 NULL, u, NULL, 0, 243 CTL_HW, HW_PHYSMEM, CTL_EOL); 244 sysctl_createv(clog, 0, NULL, NULL, 245 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 246 CTLTYPE_INT, "pagesize", 247 SYSCTL_DESCR("Software page size"), 248 NULL, PAGE_SIZE, NULL, 0, 249 CTL_HW, HW_PAGESIZE, CTL_EOL); 250 sysctl_createv(clog, 0, NULL, NULL, 251 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 252 CTLTYPE_INT, "alignbytes", 253 SYSCTL_DESCR("Alignment constraint for all possible " 254 "data types"), 255 NULL, ALIGNBYTES, NULL, 0, 256 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 257 q = (u_quad_t)physmem * PAGE_SIZE; 258 sysctl_createv(clog, 0, NULL, NULL, 259 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 260 CTLTYPE_QUAD, "physmem64", 261 SYSCTL_DESCR("Bytes of physical memory"), 262 NULL, q, NULL, 0, 263 CTL_HW, HW_PHYSMEM64, CTL_EOL); 264 sysctl_createv(clog, 0, NULL, NULL, 265 CTLFLAG_PERMANENT, 266 CTLTYPE_INT, "ncpuonline", 267 SYSCTL_DESCR("Number of CPUs online"), 268 NULL, 0, &ncpuonline, 0, 269 CTL_HW, HW_NCPUONLINE, CTL_EOL); 270 } 271 272 /* 273 * sysctl helper function for kern.hostname and kern.domainnname. 274 * resets the relevant recorded length when the underlying name is 275 * changed. 276 */ 277 static int 278 sysctl_setlen(SYSCTLFN_ARGS) 279 { 280 int error; 281 282 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 283 if (error || newp == NULL) 284 return (error); 285 286 switch (rnode->sysctl_num) { 287 case KERN_HOSTNAME: 288 hostnamelen = strlen((const char*)rnode->sysctl_data); 289 break; 290 case KERN_DOMAINNAME: 291 domainnamelen = strlen((const char*)rnode->sysctl_data); 292 break; 293 } 294 295 return (0); 296 }
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