1 | /*- |
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2 | * Copyright (c) 1982, 1986, 1989, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * This code is derived from software contributed to Berkeley by |
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6 | * Mike Karels at Berkeley Software Design, Inc. |
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7 | * |
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8 | * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD |
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9 | * project, to make these variables more userfriendly. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * 1. Redistributions of source code must retain the above copyright |
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15 | * notice, this list of conditions and the following disclaimer. |
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16 | * 2. Redistributions in binary form must reproduce the above copyright |
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17 | * notice, this list of conditions and the following disclaimer in the |
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18 | * documentation and/or other materials provided with the distribution. |
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19 | * 4. Neither the name of the University nor the names of its contributors |
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20 | * may be used to endorse or promote products derived from this software |
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21 | * without specific prior written permission. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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33 | * SUCH DAMAGE. |
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34 | * |
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35 | * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 |
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36 | * $FreeBSD: src/sys/kern/kern_mib.c,v 1.74 2005/02/28 21:42:56 wes Exp $ |
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37 | */ |
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38 | |
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39 | /* |
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40 | * $Id$ |
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41 | */ |
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42 | |
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43 | #ifndef __rtems__ |
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44 | #include "opt_posix.h" |
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45 | #endif |
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46 | |
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47 | #include <sys/param.h> |
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48 | #include <sys/kernel.h> |
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49 | #include <sys/systm.h> |
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50 | #include <sys/sysctl.h> |
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51 | #include <sys/proc.h> |
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52 | #ifndef __rtems__ |
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53 | #include <sys/lock.h> |
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54 | #include <sys/mutex.h> |
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55 | #include <sys/jail.h> |
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56 | #include <sys/smp.h> |
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57 | #endif |
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58 | #include <sys/unistd.h> |
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59 | |
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60 | #ifdef __rtems__ |
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61 | char machine[] = "SET ME"; |
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62 | char osrelease[] = RTEMS_VERSION; |
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63 | char ostype[] = "RTEMS"; |
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64 | #endif |
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65 | |
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66 | SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, |
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67 | "Sysctl internal magic"); |
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68 | SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, |
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69 | "High kernel, proc, limits &c"); |
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70 | #ifndef __rtems__ |
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71 | SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, |
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72 | "Virtual memory"); |
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73 | SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, |
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74 | "File system"); |
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75 | #endif |
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76 | SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, |
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77 | "Network, (see socket.h)"); |
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78 | #ifndef __rtems__ |
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79 | SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, |
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80 | "Debugging"); |
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81 | SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, |
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82 | "Sizeof various things"); |
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83 | SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, |
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84 | "hardware"); |
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85 | SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, |
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86 | "machine dependent"); |
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87 | SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, |
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88 | "user-level"); |
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89 | SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, |
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90 | "p1003_1b, (see p1003_1b.h)"); |
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91 | |
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92 | SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, |
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93 | "Compatibility code"); |
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94 | SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0, |
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95 | "Security"); |
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96 | #ifdef REGRESSION |
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97 | SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0, |
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98 | "Regression test MIB"); |
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99 | #endif |
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100 | |
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101 | SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD, |
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102 | kern_ident, 0, "Kernel identifier"); |
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103 | #endif /* __rtems__ */ |
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104 | |
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105 | SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, |
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106 | osrelease, 0, "Operating system release"); |
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107 | |
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108 | SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, |
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109 | 0, BSD, "Operating system revision"); |
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110 | |
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111 | #ifndef __rtems__ |
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112 | SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, |
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113 | version, 0, "Kernel version"); |
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114 | #endif |
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115 | |
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116 | SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, |
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117 | ostype, 0, "Operating system type"); |
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118 | |
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119 | #ifndef __rtems__ |
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120 | extern int osreldate; |
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121 | SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, |
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122 | &osreldate, 0, "Operating system release date"); |
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123 | |
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124 | SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, |
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125 | &maxproc, 0, "Maximum number of processes"); |
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126 | |
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127 | SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, |
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128 | &maxprocperuid, 0, "Maximum processes allowed per userid"); |
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129 | |
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130 | SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD, |
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131 | &maxusers, 0, "Hint for kernel tuning"); |
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132 | |
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133 | SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, |
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134 | 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); |
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135 | |
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136 | SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, |
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137 | 0, _POSIX_VERSION, "Version of POSIX attempting to comply to"); |
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138 | |
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139 | SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, |
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140 | 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); |
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141 | |
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142 | SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, |
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143 | 0, 1, "Whether job control is available"); |
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144 | |
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145 | #ifdef _POSIX_SAVED_IDS |
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146 | SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, |
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147 | 0, 1, "Whether saved set-group/user ID is available"); |
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148 | #else |
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149 | SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, |
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150 | 0, 0, "Whether saved set-group/user ID is available"); |
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151 | #endif |
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152 | |
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153 | char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ |
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154 | |
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155 | SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, |
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156 | kernelname, sizeof kernelname, "Name of kernel file booted"); |
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157 | |
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158 | #ifdef SMP |
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159 | SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, |
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160 | &mp_ncpus, 0, "Number of active CPUs"); |
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161 | #else |
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162 | SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, |
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163 | 0, 1, "Number of active CPUs"); |
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164 | #endif |
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165 | |
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166 | SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, |
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167 | 0, BYTE_ORDER, "System byte order"); |
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168 | |
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169 | SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, |
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170 | 0, PAGE_SIZE, "System memory page size"); |
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171 | |
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172 | static int |
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173 | sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) |
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174 | { |
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175 | u_long val; |
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176 | |
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177 | val = ctob(physmem); |
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178 | return (sysctl_handle_long(oidp, &val, 0, req)); |
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179 | } |
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180 | |
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181 | SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, |
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182 | 0, 0, sysctl_hw_physmem, "LU", ""); |
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183 | |
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184 | static int |
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185 | sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) |
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186 | { |
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187 | u_long val; |
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188 | |
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189 | val = ctob(physmem - cnt.v_wire_count); |
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190 | return (sysctl_handle_long(oidp, &val, 0, req)); |
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191 | } |
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192 | |
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193 | SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, |
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194 | 0, 0, sysctl_hw_usermem, "LU", ""); |
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195 | |
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196 | SYSCTL_ULONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); |
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197 | |
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198 | static char machine_arch[] = MACHINE_ARCH; |
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199 | SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, |
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200 | machine_arch, 0, "System architecture"); |
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201 | |
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202 | char hostname[MAXHOSTNAMELEN]; |
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203 | |
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204 | static int |
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205 | sysctl_hostname(SYSCTL_HANDLER_ARGS) |
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206 | { |
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207 | struct prison *pr; |
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208 | char tmphostname[MAXHOSTNAMELEN]; |
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209 | int error; |
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210 | |
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211 | pr = req->td->td_ucred->cr_prison; |
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212 | if (pr != NULL) { |
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213 | if (!jail_set_hostname_allowed && req->newptr) |
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214 | return (EPERM); |
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215 | /* |
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216 | * Process is in jail, so make a local copy of jail |
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217 | * hostname to get/set so we don't have to hold the jail |
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218 | * mutex during the sysctl copyin/copyout activities. |
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219 | */ |
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220 | mtx_lock(&pr->pr_mtx); |
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221 | bcopy(pr->pr_host, tmphostname, MAXHOSTNAMELEN); |
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222 | mtx_unlock(&pr->pr_mtx); |
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223 | |
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224 | error = sysctl_handle_string(oidp, tmphostname, |
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225 | sizeof pr->pr_host, req); |
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226 | |
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227 | if (req->newptr != NULL && error == 0) { |
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228 | /* |
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229 | * Copy the locally set hostname to the jail, if |
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230 | * appropriate. |
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231 | */ |
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232 | mtx_lock(&pr->pr_mtx); |
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233 | bcopy(tmphostname, pr->pr_host, MAXHOSTNAMELEN); |
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234 | mtx_unlock(&pr->pr_mtx); |
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235 | } |
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236 | } else |
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237 | error = sysctl_handle_string(oidp, |
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238 | hostname, sizeof hostname, req); |
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239 | return (error); |
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240 | } |
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241 | |
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242 | SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, |
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243 | CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, |
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244 | 0, 0, sysctl_hostname, "A", "Hostname"); |
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245 | |
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246 | static int regression_securelevel_nonmonotonic = 0; |
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247 | |
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248 | #ifdef REGRESSION |
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249 | SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, |
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250 | ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); |
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251 | #endif |
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252 | |
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253 | int securelevel = -1; |
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254 | struct mtx securelevel_mtx; |
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255 | |
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256 | MTX_SYSINIT(securelevel_lock, &securelevel_mtx, "securelevel mutex lock", |
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257 | MTX_DEF); |
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258 | |
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259 | static int |
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260 | sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) |
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261 | { |
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262 | struct prison *pr; |
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263 | int error, level; |
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264 | |
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265 | pr = req->td->td_ucred->cr_prison; |
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266 | |
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267 | /* |
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268 | * If the process is in jail, return the maximum of the global and |
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269 | * local levels; otherwise, return the global level. |
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270 | */ |
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271 | if (pr != NULL) { |
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272 | mtx_lock(&pr->pr_mtx); |
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273 | level = imax(securelevel, pr->pr_securelevel); |
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274 | mtx_unlock(&pr->pr_mtx); |
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275 | } else |
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276 | level = securelevel; |
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277 | error = sysctl_handle_int(oidp, &level, 0, req); |
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278 | if (error || !req->newptr) |
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279 | return (error); |
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280 | /* |
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281 | * Permit update only if the new securelevel exceeds the |
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282 | * global level, and local level if any. |
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283 | */ |
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284 | if (pr != NULL) { |
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285 | mtx_lock(&pr->pr_mtx); |
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286 | if (!regression_securelevel_nonmonotonic && |
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287 | (level < imax(securelevel, pr->pr_securelevel))) { |
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288 | mtx_unlock(&pr->pr_mtx); |
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289 | return (EPERM); |
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290 | } |
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291 | pr->pr_securelevel = level; |
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292 | mtx_unlock(&pr->pr_mtx); |
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293 | } else { |
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294 | mtx_lock(&securelevel_mtx); |
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295 | if (!regression_securelevel_nonmonotonic && |
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296 | (level < securelevel)) { |
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297 | mtx_unlock(&securelevel_mtx); |
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298 | return (EPERM); |
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299 | } |
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300 | securelevel = level; |
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301 | mtx_unlock(&securelevel_mtx); |
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302 | } |
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303 | return (error); |
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304 | } |
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305 | |
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306 | SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, |
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307 | CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, |
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308 | "I", "Current secure level"); |
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309 | |
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310 | char domainname[MAXHOSTNAMELEN]; |
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311 | SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, |
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312 | &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); |
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313 | |
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314 | u_long hostid; |
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315 | SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); |
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316 | |
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317 | /* |
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318 | * This is really cheating. These actually live in the libc, something |
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319 | * which I'm not quite sure is a good idea anyway, but in order for |
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320 | * getnext and friends to actually work, we define dummies here. |
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321 | */ |
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322 | SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, |
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323 | "", 0, "PATH that finds all the standard utilities"); |
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324 | SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, |
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325 | 0, 0, "Max ibase/obase values in bc(1)"); |
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326 | SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, |
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327 | 0, 0, "Max array size in bc(1)"); |
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328 | SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, |
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329 | 0, 0, "Max scale value in bc(1)"); |
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330 | SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, |
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331 | 0, 0, "Max string length in bc(1)"); |
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332 | SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, |
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333 | 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); |
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334 | SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); |
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335 | SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, |
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336 | 0, 0, "Max length (bytes) of a text-processing utility's input line"); |
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337 | SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, |
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338 | 0, 0, "Maximum number of repeats of a regexp permitted"); |
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339 | SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, |
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340 | 0, 0, |
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341 | "The version of POSIX 1003.2 with which the system attempts to comply"); |
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342 | SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, |
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343 | 0, 0, "Whether C development supports the C bindings option"); |
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344 | SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, |
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345 | 0, 0, "Whether system supports the C development utilities option"); |
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346 | SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, |
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347 | 0, 0, ""); |
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348 | SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, |
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349 | 0, 0, "Whether system supports FORTRAN development utilities"); |
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350 | SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, |
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351 | 0, 0, "Whether system supports FORTRAN runtime utilities"); |
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352 | SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, |
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353 | 0, 0, "Whether system supports creation of locales"); |
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354 | SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, |
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355 | 0, 0, "Whether system supports software development utilities"); |
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356 | SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, |
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357 | 0, 0, "Whether system supports the user portability utilities"); |
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358 | SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, |
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359 | 0, 0, "Min Maximum number of streams a process may have open at one time"); |
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360 | SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, |
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361 | 0, 0, "Min Maximum number of types supported for timezone names"); |
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362 | |
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363 | #include <sys/vnode.h> |
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364 | SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, |
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365 | 0, sizeof(struct vnode), "sizeof(struct vnode)"); |
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366 | |
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367 | SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, |
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368 | 0, sizeof(struct proc), "sizeof(struct proc)"); |
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369 | |
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370 | #include <sys/conf.h> |
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371 | SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD, |
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372 | 0, sizeof(struct cdev), "sizeof(struct cdev)"); |
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373 | |
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374 | #include <sys/bio.h> |
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375 | #include <sys/buf.h> |
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376 | SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, |
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377 | 0, sizeof(struct bio), "sizeof(struct bio)"); |
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378 | SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, |
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379 | 0, sizeof(struct buf), "sizeof(struct buf)"); |
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380 | |
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381 | #include <sys/user.h> |
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382 | SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, |
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383 | 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); |
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384 | |
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385 | #endif /* __rtems__ */ |
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