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 | * 3. All advertising materials mentioning features or use of this software |
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20 | * must display the following acknowledgement: |
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21 | * This product includes software developed by the University of |
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22 | * California, Berkeley and its contributors. |
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23 | * 4. Neither the name of the University nor the names of its contributors |
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24 | * may be used to endorse or promote products derived from this software |
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25 | * without specific prior written permission. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | * |
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39 | * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 |
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40 | * $FreeBSD: src/sys/kern/kern_sysctl.c,v 1.135 2002/10/27 07:12:34 rwatson Exp $ |
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41 | */ |
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42 | |
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43 | #ifndef __rtems__ |
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44 | #include "opt_compat.h" |
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45 | #include "opt_mac.h" |
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46 | #endif |
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47 | |
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48 | #include <sys/param.h> |
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49 | #include <sys/systm.h> |
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50 | #include <sys/kernel.h> |
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51 | #include <sys/sysctl.h> |
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52 | #include <sys/malloc.h> |
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53 | #include <sys/proc.h> |
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54 | #ifndef __rtems__ |
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55 | #include <sys/mac.h> |
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56 | #include <sys/lock.h> |
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57 | #include <sys/mutex.h> |
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58 | #include <sys/sx.h> |
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59 | #include <sys/sysproto.h> |
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60 | #else |
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61 | #include <sys/buf.h> |
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62 | |
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63 | /* Since we compile with strict ANSI we need to undef it to get |
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64 | * prototypes for extensions |
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65 | */ |
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66 | #undef __STRICT_ANSI__ |
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67 | |
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68 | #include <stdio.h> /* for snprintf() */ |
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69 | size_t strlcpy(char *, const char *, size_t); |
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70 | #endif |
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71 | #include <vm/vm.h> |
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72 | #include <vm/vm_extern.h> |
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73 | |
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74 | #ifndef __rtems__ |
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75 | static MALLOC_DEFINE(M_SYSCTL, "sysctl", "sysctl internal magic"); |
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76 | static MALLOC_DEFINE(M_SYSCTLOID, "sysctloid", "sysctl dynamic oids"); |
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77 | static MALLOC_DEFINE(M_SYSCTLTMP, "sysctltmp", "sysctl temp output buffer"); |
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78 | #else |
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79 | /* |
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80 | * Currently these mean nothing on RTEMS. |
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81 | */ |
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82 | #define M_SYSCTLOID 1 |
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83 | #define M_SYSCTLTMP 2 |
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84 | #define M_ZERO 0 |
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85 | |
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86 | typedef unsigned long *uintptr_t; |
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87 | |
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88 | #define mtx_lock(l) |
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89 | #define mtx_unlock(l) |
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90 | |
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91 | #endif |
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92 | |
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93 | #ifndef __rtems__ |
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94 | /* |
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95 | * Locking - this locks the sysctl tree in memory. |
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96 | */ |
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97 | static struct sx sysctllock; |
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98 | #endif |
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99 | |
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100 | #ifdef __rtems__ |
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101 | #define SYSCTL_LOCK() |
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102 | #define SYSCTL_UNLOCK() |
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103 | #define SYSCTL_INIT() |
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104 | #else |
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105 | #define SYSCTL_LOCK() sx_xlock(&sysctllock) |
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106 | #define SYSCTL_UNLOCK() sx_xunlock(&sysctllock) |
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107 | #define SYSCTL_INIT() sx_init(&sysctllock, "sysctl sysctllock") |
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108 | #endif |
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109 | |
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110 | static int sysctl_root(SYSCTL_HANDLER_ARGS); |
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111 | |
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112 | struct sysctl_oid_list sysctl__children; /* root list */ |
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113 | |
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114 | static struct sysctl_oid * |
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115 | sysctl_find_oidname(const char *name, struct sysctl_oid_list *list) |
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116 | { |
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117 | struct sysctl_oid *oidp; |
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118 | |
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119 | SLIST_FOREACH(oidp, list, oid_link) { |
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120 | if (strcmp(oidp->oid_name, name) == 0) { |
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121 | return (oidp); |
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122 | } |
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123 | } |
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124 | return (NULL); |
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125 | } |
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126 | |
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127 | /* |
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128 | * Initialization of the MIB tree. |
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129 | * |
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130 | * Order by number in each list. |
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131 | */ |
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132 | |
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133 | void |
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134 | sysctl_register_oid(struct sysctl_oid *oidp) |
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135 | { |
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136 | struct sysctl_oid_list *parent = oidp->oid_parent; |
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137 | struct sysctl_oid *p; |
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138 | struct sysctl_oid *q; |
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139 | |
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140 | /* |
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141 | * First check if another oid with the same name already |
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142 | * exists in the parent's list. |
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143 | */ |
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144 | p = sysctl_find_oidname(oidp->oid_name, parent); |
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145 | if (p != NULL) { |
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146 | if ((p->oid_kind & CTLTYPE) == CTLTYPE_NODE) { |
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147 | p->oid_refcnt++; |
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148 | return; |
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149 | } else { |
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150 | printf("can't re-use a leaf (%s)!\n", p->oid_name); |
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151 | return; |
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152 | } |
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153 | } |
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154 | /* |
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155 | * If this oid has a number OID_AUTO, give it a number which |
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156 | * is greater than any current oid. |
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157 | * NOTE: DO NOT change the starting value here, change it in |
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158 | * <sys/sysctl.h>, and make sure it is at least 256 to |
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159 | * accomodate e.g. net.inet.raw as a static sysctl node. |
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160 | */ |
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161 | if (oidp->oid_number == OID_AUTO) { |
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162 | static int newoid = CTL_AUTO_START; |
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163 | |
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164 | oidp->oid_number = newoid++; |
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165 | if (newoid == 0x7fffffff) |
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166 | panic("out of oids"); |
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167 | } |
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168 | #if 0 |
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169 | else if (oidp->oid_number >= CTL_AUTO_START) { |
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170 | /* do not panic; this happens when unregistering sysctl sets */ |
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171 | printf("static sysctl oid too high: %d", oidp->oid_number); |
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172 | } |
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173 | #endif |
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174 | |
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175 | /* |
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176 | * Insert the oid into the parent's list in order. |
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177 | */ |
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178 | q = NULL; |
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179 | SLIST_FOREACH(p, parent, oid_link) { |
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180 | if (oidp->oid_number < p->oid_number) |
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181 | break; |
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182 | q = p; |
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183 | } |
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184 | if (q) |
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185 | SLIST_INSERT_AFTER(q, oidp, oid_link); |
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186 | else |
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187 | SLIST_INSERT_HEAD(parent, oidp, oid_link); |
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188 | } |
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189 | |
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190 | void |
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191 | sysctl_unregister_oid(struct sysctl_oid *oidp) |
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192 | { |
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193 | SLIST_REMOVE(oidp->oid_parent, oidp, sysctl_oid, oid_link); |
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194 | } |
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195 | |
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196 | /* Initialize a new context to keep track of dynamically added sysctls. */ |
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197 | int |
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198 | sysctl_ctx_init(struct sysctl_ctx_list *c) |
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199 | { |
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200 | |
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201 | if (c == NULL) { |
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202 | return (EINVAL); |
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203 | } |
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204 | TAILQ_INIT(c); |
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205 | return (0); |
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206 | } |
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207 | |
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208 | /* Free the context, and destroy all dynamic oids registered in this context */ |
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209 | int |
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210 | sysctl_ctx_free(struct sysctl_ctx_list *clist) |
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211 | { |
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212 | struct sysctl_ctx_entry *e, *e1; |
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213 | int error; |
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214 | |
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215 | error = 0; |
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216 | /* |
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217 | * First perform a "dry run" to check if it's ok to remove oids. |
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218 | * XXX FIXME |
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219 | * XXX This algorithm is a hack. But I don't know any |
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220 | * XXX better solution for now... |
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221 | */ |
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222 | TAILQ_FOREACH(e, clist, link) { |
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223 | error = sysctl_remove_oid(e->entry, 0, 0); |
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224 | if (error) |
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225 | break; |
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226 | } |
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227 | /* |
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228 | * Restore deregistered entries, either from the end, |
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229 | * or from the place where error occured. |
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230 | * e contains the entry that was not unregistered |
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231 | */ |
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232 | if (error) |
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233 | e1 = TAILQ_PREV(e, sysctl_ctx_list, link); |
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234 | else |
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235 | e1 = TAILQ_LAST(clist, sysctl_ctx_list); |
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236 | while (e1 != NULL) { |
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237 | sysctl_register_oid(e1->entry); |
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238 | e1 = TAILQ_PREV(e1, sysctl_ctx_list, link); |
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239 | } |
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240 | if (error) |
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241 | return(EBUSY); |
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242 | /* Now really delete the entries */ |
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243 | e = TAILQ_FIRST(clist); |
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244 | while (e != NULL) { |
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245 | e1 = TAILQ_NEXT(e, link); |
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246 | error = sysctl_remove_oid(e->entry, 1, 0); |
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247 | if (error) |
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248 | panic("sysctl_remove_oid: corrupt tree, entry: %s", |
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249 | e->entry->oid_name); |
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250 | free(e, M_SYSCTLOID); |
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251 | e = e1; |
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252 | } |
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253 | return (error); |
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254 | } |
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255 | |
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256 | /* Add an entry to the context */ |
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257 | struct sysctl_ctx_entry * |
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258 | sysctl_ctx_entry_add(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) |
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259 | { |
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260 | struct sysctl_ctx_entry *e; |
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261 | |
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262 | if (clist == NULL || oidp == NULL) |
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263 | return(NULL); |
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264 | e = malloc(sizeof(struct sysctl_ctx_entry), M_SYSCTLOID, M_WAITOK); |
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265 | e->entry = oidp; |
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266 | TAILQ_INSERT_HEAD(clist, e, link); |
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267 | return (e); |
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268 | } |
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269 | |
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270 | /* Find an entry in the context */ |
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271 | struct sysctl_ctx_entry * |
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272 | sysctl_ctx_entry_find(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) |
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273 | { |
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274 | struct sysctl_ctx_entry *e; |
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275 | |
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276 | if (clist == NULL || oidp == NULL) |
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277 | return(NULL); |
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278 | TAILQ_FOREACH(e, clist, link) { |
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279 | if(e->entry == oidp) |
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280 | return(e); |
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281 | } |
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282 | return (e); |
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283 | } |
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284 | |
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285 | /* |
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286 | * Delete an entry from the context. |
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287 | * NOTE: this function doesn't free oidp! You have to remove it |
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288 | * with sysctl_remove_oid(). |
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289 | */ |
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290 | int |
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291 | sysctl_ctx_entry_del(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) |
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292 | { |
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293 | struct sysctl_ctx_entry *e; |
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294 | |
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295 | if (clist == NULL || oidp == NULL) |
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296 | return (EINVAL); |
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297 | e = sysctl_ctx_entry_find(clist, oidp); |
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298 | if (e != NULL) { |
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299 | TAILQ_REMOVE(clist, e, link); |
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300 | free(e, M_SYSCTLOID); |
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301 | return (0); |
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302 | } else |
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303 | return (ENOENT); |
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304 | } |
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305 | |
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306 | /* |
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307 | * Remove dynamically created sysctl trees. |
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308 | * oidp - top of the tree to be removed |
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309 | * del - if 0 - just deregister, otherwise free up entries as well |
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310 | * recurse - if != 0 traverse the subtree to be deleted |
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311 | */ |
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312 | int |
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313 | sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse) |
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314 | { |
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315 | struct sysctl_oid *p; |
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316 | int error; |
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317 | |
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318 | if (oidp == NULL) |
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319 | return(EINVAL); |
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320 | if ((oidp->oid_kind & CTLFLAG_DYN) == 0) { |
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321 | printf("can't remove non-dynamic nodes!\n"); |
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322 | return (EINVAL); |
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323 | } |
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324 | /* |
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325 | * WARNING: normal method to do this should be through |
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326 | * sysctl_ctx_free(). Use recursing as the last resort |
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327 | * method to purge your sysctl tree of leftovers... |
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328 | * However, if some other code still references these nodes, |
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329 | * it will panic. |
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330 | */ |
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331 | if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { |
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332 | if (oidp->oid_refcnt == 1) { |
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333 | SLIST_FOREACH(p, SYSCTL_CHILDREN(oidp), oid_link) { |
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334 | if (!recurse) |
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335 | return (ENOTEMPTY); |
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336 | error = sysctl_remove_oid(p, del, recurse); |
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337 | if (error) |
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338 | return (error); |
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339 | } |
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340 | if (del) |
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341 | free(SYSCTL_CHILDREN(oidp), M_SYSCTLOID); |
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342 | } |
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343 | } |
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344 | if (oidp->oid_refcnt > 1 ) { |
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345 | oidp->oid_refcnt--; |
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346 | } else { |
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347 | if (oidp->oid_refcnt == 0) { |
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348 | printf("Warning: bad oid_refcnt=%u (%s)!\n", |
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349 | oidp->oid_refcnt, oidp->oid_name); |
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350 | return (EINVAL); |
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351 | } |
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352 | sysctl_unregister_oid(oidp); |
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353 | if (del) { |
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354 | if (oidp->descr) |
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355 | free((void *)(uintptr_t)(const void *)oidp->descr, M_SYSCTLOID); |
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356 | free((void *)(uintptr_t)(const void *)oidp->oid_name, |
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357 | M_SYSCTLOID); |
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358 | free(oidp, M_SYSCTLOID); |
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359 | } |
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360 | } |
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361 | return (0); |
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362 | } |
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363 | |
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364 | /* |
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365 | * Create new sysctls at run time. |
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366 | * clist may point to a valid context initialized with sysctl_ctx_init(). |
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367 | */ |
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368 | struct sysctl_oid * |
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369 | sysctl_add_oid(struct sysctl_ctx_list *clist, struct sysctl_oid_list *parent, |
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370 | int number, const char *name, int kind, void *arg1, int arg2, |
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371 | int (*handler)(SYSCTL_HANDLER_ARGS), const char *fmt, const char *descr) |
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372 | { |
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373 | struct sysctl_oid *oidp; |
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374 | ssize_t len; |
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375 | char *newname; |
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376 | |
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377 | /* You have to hook up somewhere.. */ |
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378 | if (parent == NULL) |
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379 | return(NULL); |
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380 | /* Check if the node already exists, otherwise create it */ |
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381 | oidp = sysctl_find_oidname(name, parent); |
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382 | if (oidp != NULL) { |
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383 | if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { |
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384 | oidp->oid_refcnt++; |
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385 | /* Update the context */ |
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386 | if (clist != NULL) |
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387 | sysctl_ctx_entry_add(clist, oidp); |
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388 | return (oidp); |
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389 | } else { |
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390 | printf("can't re-use a leaf (%s)!\n", name); |
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391 | return (NULL); |
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392 | } |
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393 | } |
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394 | oidp = malloc(sizeof(struct sysctl_oid), M_SYSCTLOID, M_WAITOK|M_ZERO); |
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395 | oidp->oid_parent = parent; |
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396 | SLIST_NEXT(oidp, oid_link) = NULL; |
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397 | oidp->oid_number = number; |
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398 | oidp->oid_refcnt = 1; |
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399 | len = strlen(name); |
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400 | newname = malloc(len + 1, M_SYSCTLOID, M_WAITOK); |
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401 | bcopy(name, newname, len + 1); |
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402 | newname[len] = '\0'; |
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403 | oidp->oid_name = newname; |
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404 | oidp->oid_handler = handler; |
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405 | oidp->oid_kind = CTLFLAG_DYN | kind; |
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406 | if ((kind & CTLTYPE) == CTLTYPE_NODE) { |
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407 | /* Allocate space for children */ |
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408 | SYSCTL_CHILDREN(oidp) = malloc(sizeof(struct sysctl_oid_list), |
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409 | M_SYSCTLOID, M_WAITOK); |
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410 | SLIST_INIT(SYSCTL_CHILDREN(oidp)); |
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411 | } else { |
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412 | oidp->oid_arg1 = arg1; |
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413 | oidp->oid_arg2 = arg2; |
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414 | } |
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415 | oidp->oid_fmt = fmt; |
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416 | if (descr) { |
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417 | int len = strlen(descr) + 1; |
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418 | oidp->descr = malloc(len, M_SYSCTLOID, M_WAITOK); |
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419 | if (oidp->descr) |
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420 | strcpy((char *)(uintptr_t)(const void *)oidp->descr, descr); |
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421 | } |
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422 | /* Update the context, if used */ |
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423 | if (clist != NULL) |
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424 | sysctl_ctx_entry_add(clist, oidp); |
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425 | /* Register this oid */ |
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426 | sysctl_register_oid(oidp); |
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427 | return (oidp); |
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428 | } |
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429 | |
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430 | /* |
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431 | * Register the kernel's oids on startup. |
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432 | */ |
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433 | SET_DECLARE(sysctl_set, struct sysctl_oid); |
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434 | |
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435 | void |
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436 | sysctl_register_all(void *arg) |
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437 | { |
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438 | struct sysctl_oid **oidp; |
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439 | |
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440 | SYSCTL_INIT(); |
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441 | SET_FOREACH(oidp, sysctl_set) |
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442 | sysctl_register_oid(*oidp); |
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443 | } |
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444 | SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_all, 0); |
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445 | |
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446 | /* |
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447 | * "Staff-functions" |
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448 | * |
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449 | * These functions implement a presently undocumented interface |
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450 | * used by the sysctl program to walk the tree, and get the type |
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451 | * so it can print the value. |
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452 | * This interface is under work and consideration, and should probably |
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453 | * be killed with a big axe by the first person who can find the time. |
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454 | * (be aware though, that the proper interface isn't as obvious as it |
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455 | * may seem, there are various conflicting requirements. |
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456 | * |
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457 | * {0,0} printf the entire MIB-tree. |
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458 | * {0,1,...} return the name of the "..." OID. |
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459 | * {0,2,...} return the next OID. |
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460 | * {0,3} return the OID of the name in "new" |
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461 | * {0,4,...} return the kind & format info for the "..." OID. |
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462 | * {0,5,...} return the description the "..." OID. |
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463 | */ |
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464 | |
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465 | static void |
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466 | sysctl_sysctl_debug_dump_node(struct sysctl_oid_list *l, int i) |
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467 | { |
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468 | int k; |
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469 | struct sysctl_oid *oidp; |
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470 | |
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471 | SLIST_FOREACH(oidp, l, oid_link) { |
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472 | |
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473 | for (k=0; k<i; k++) |
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474 | printf(" "); |
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475 | |
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476 | printf("%d %s ", oidp->oid_number, oidp->oid_name); |
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477 | |
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478 | printf("%c%c", |
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479 | oidp->oid_kind & CTLFLAG_RD ? 'R':' ', |
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480 | oidp->oid_kind & CTLFLAG_WR ? 'W':' '); |
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481 | |
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482 | if (oidp->oid_handler) |
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483 | printf(" *Handler"); |
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484 | |
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485 | switch (oidp->oid_kind & CTLTYPE) { |
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486 | case CTLTYPE_NODE: |
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487 | printf(" Node\n"); |
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488 | if (!oidp->oid_handler) { |
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489 | sysctl_sysctl_debug_dump_node( |
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490 | oidp->oid_arg1, i+2); |
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491 | } |
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492 | break; |
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493 | case CTLTYPE_INT: printf(" Int\n"); break; |
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494 | case CTLTYPE_STRING: printf(" String\n"); break; |
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495 | case CTLTYPE_QUAD: printf(" Quad\n"); break; |
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496 | case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; |
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497 | default: printf("\n"); |
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498 | } |
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499 | |
---|
500 | } |
---|
501 | } |
---|
502 | |
---|
503 | static int |
---|
504 | sysctl_sysctl_debug(SYSCTL_HANDLER_ARGS) |
---|
505 | { |
---|
506 | #ifndef __rtems__ |
---|
507 | int error; |
---|
508 | |
---|
509 | error = suser(req->td); |
---|
510 | if (error) |
---|
511 | return error; |
---|
512 | #endif |
---|
513 | sysctl_sysctl_debug_dump_node(&sysctl__children, 0); |
---|
514 | return ENOENT; |
---|
515 | } |
---|
516 | |
---|
517 | SYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, |
---|
518 | 0, 0, sysctl_sysctl_debug, "-", ""); |
---|
519 | |
---|
520 | static int |
---|
521 | sysctl_sysctl_name(SYSCTL_HANDLER_ARGS) |
---|
522 | { |
---|
523 | int *name = (int *) arg1; |
---|
524 | u_int namelen = arg2; |
---|
525 | int error = 0; |
---|
526 | struct sysctl_oid *oid; |
---|
527 | struct sysctl_oid_list *lsp = &sysctl__children, *lsp2; |
---|
528 | char buf[10]; |
---|
529 | |
---|
530 | while (namelen) { |
---|
531 | if (!lsp) { |
---|
532 | snprintf(buf,sizeof(buf),"%d",*name); |
---|
533 | if (req->oldidx) |
---|
534 | error = SYSCTL_OUT(req, ".", 1); |
---|
535 | if (!error) |
---|
536 | error = SYSCTL_OUT(req, buf, strlen(buf)); |
---|
537 | if (error) |
---|
538 | return (error); |
---|
539 | namelen--; |
---|
540 | name++; |
---|
541 | continue; |
---|
542 | } |
---|
543 | lsp2 = 0; |
---|
544 | SLIST_FOREACH(oid, lsp, oid_link) { |
---|
545 | if (oid->oid_number != *name) |
---|
546 | continue; |
---|
547 | |
---|
548 | if (req->oldidx) |
---|
549 | error = SYSCTL_OUT(req, ".", 1); |
---|
550 | if (!error) |
---|
551 | error = SYSCTL_OUT(req, oid->oid_name, |
---|
552 | strlen(oid->oid_name)); |
---|
553 | if (error) |
---|
554 | return (error); |
---|
555 | |
---|
556 | namelen--; |
---|
557 | name++; |
---|
558 | |
---|
559 | if ((oid->oid_kind & CTLTYPE) != CTLTYPE_NODE) |
---|
560 | break; |
---|
561 | |
---|
562 | if (oid->oid_handler) |
---|
563 | break; |
---|
564 | |
---|
565 | lsp2 = (struct sysctl_oid_list *)oid->oid_arg1; |
---|
566 | break; |
---|
567 | } |
---|
568 | lsp = lsp2; |
---|
569 | } |
---|
570 | return (SYSCTL_OUT(req, "", 1)); |
---|
571 | } |
---|
572 | |
---|
573 | SYSCTL_NODE(_sysctl, 1, name, CTLFLAG_RD, sysctl_sysctl_name, ""); |
---|
574 | |
---|
575 | static int |
---|
576 | sysctl_sysctl_next_ls(struct sysctl_oid_list *lsp, int *name, u_int namelen, |
---|
577 | int *next, int *len, int level, struct sysctl_oid **oidpp) |
---|
578 | { |
---|
579 | struct sysctl_oid *oidp; |
---|
580 | |
---|
581 | *len = level; |
---|
582 | SLIST_FOREACH(oidp, lsp, oid_link) { |
---|
583 | *next = oidp->oid_number; |
---|
584 | *oidpp = oidp; |
---|
585 | |
---|
586 | if (oidp->oid_kind & CTLFLAG_SKIP) |
---|
587 | continue; |
---|
588 | |
---|
589 | if (!namelen) { |
---|
590 | if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) |
---|
591 | return 0; |
---|
592 | if (oidp->oid_handler) |
---|
593 | /* We really should call the handler here...*/ |
---|
594 | return 0; |
---|
595 | lsp = (struct sysctl_oid_list *)oidp->oid_arg1; |
---|
596 | if (!sysctl_sysctl_next_ls(lsp, 0, 0, next+1, |
---|
597 | len, level+1, oidpp)) |
---|
598 | return 0; |
---|
599 | goto next; |
---|
600 | } |
---|
601 | |
---|
602 | if (oidp->oid_number < *name) |
---|
603 | continue; |
---|
604 | |
---|
605 | if (oidp->oid_number > *name) { |
---|
606 | if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) |
---|
607 | return 0; |
---|
608 | if (oidp->oid_handler) |
---|
609 | return 0; |
---|
610 | lsp = (struct sysctl_oid_list *)oidp->oid_arg1; |
---|
611 | if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, |
---|
612 | next+1, len, level+1, oidpp)) |
---|
613 | return (0); |
---|
614 | goto next; |
---|
615 | } |
---|
616 | if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) |
---|
617 | continue; |
---|
618 | |
---|
619 | if (oidp->oid_handler) |
---|
620 | continue; |
---|
621 | |
---|
622 | lsp = (struct sysctl_oid_list *)oidp->oid_arg1; |
---|
623 | if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, next+1, |
---|
624 | len, level+1, oidpp)) |
---|
625 | return (0); |
---|
626 | next: |
---|
627 | namelen = 1; |
---|
628 | *len = level; |
---|
629 | } |
---|
630 | return 1; |
---|
631 | } |
---|
632 | |
---|
633 | static int |
---|
634 | sysctl_sysctl_next(SYSCTL_HANDLER_ARGS) |
---|
635 | { |
---|
636 | int *name = (int *) arg1; |
---|
637 | u_int namelen = arg2; |
---|
638 | int i, j, error; |
---|
639 | struct sysctl_oid *oid; |
---|
640 | struct sysctl_oid_list *lsp = &sysctl__children; |
---|
641 | int newoid[CTL_MAXNAME]; |
---|
642 | |
---|
643 | i = sysctl_sysctl_next_ls(lsp, name, namelen, newoid, &j, 1, &oid); |
---|
644 | if (i) |
---|
645 | return ENOENT; |
---|
646 | error = SYSCTL_OUT(req, newoid, j * sizeof (int)); |
---|
647 | return (error); |
---|
648 | } |
---|
649 | |
---|
650 | SYSCTL_NODE(_sysctl, 2, next, CTLFLAG_RD, sysctl_sysctl_next, ""); |
---|
651 | |
---|
652 | static int |
---|
653 | name2oid (char *name, int *oid, int *len, struct sysctl_oid **oidpp) |
---|
654 | { |
---|
655 | int i; |
---|
656 | struct sysctl_oid *oidp; |
---|
657 | struct sysctl_oid_list *lsp = &sysctl__children; |
---|
658 | char *p; |
---|
659 | |
---|
660 | if (!*name) |
---|
661 | return ENOENT; |
---|
662 | |
---|
663 | p = name + strlen(name) - 1 ; |
---|
664 | if (*p == '.') |
---|
665 | *p = '\0'; |
---|
666 | |
---|
667 | *len = 0; |
---|
668 | |
---|
669 | for (p = name; *p && *p != '.'; p++) |
---|
670 | ; |
---|
671 | i = *p; |
---|
672 | if (i == '.') |
---|
673 | *p = '\0'; |
---|
674 | |
---|
675 | oidp = SLIST_FIRST(lsp); |
---|
676 | |
---|
677 | while (oidp && *len < CTL_MAXNAME) { |
---|
678 | if (strcmp(name, oidp->oid_name)) { |
---|
679 | oidp = SLIST_NEXT(oidp, oid_link); |
---|
680 | continue; |
---|
681 | } |
---|
682 | *oid++ = oidp->oid_number; |
---|
683 | (*len)++; |
---|
684 | |
---|
685 | if (!i) { |
---|
686 | if (oidpp) |
---|
687 | *oidpp = oidp; |
---|
688 | return (0); |
---|
689 | } |
---|
690 | |
---|
691 | if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) |
---|
692 | break; |
---|
693 | |
---|
694 | if (oidp->oid_handler) |
---|
695 | break; |
---|
696 | |
---|
697 | lsp = (struct sysctl_oid_list *)oidp->oid_arg1; |
---|
698 | oidp = SLIST_FIRST(lsp); |
---|
699 | name = p+1; |
---|
700 | for (p = name; *p && *p != '.'; p++) |
---|
701 | ; |
---|
702 | i = *p; |
---|
703 | if (i == '.') |
---|
704 | *p = '\0'; |
---|
705 | } |
---|
706 | return ENOENT; |
---|
707 | } |
---|
708 | |
---|
709 | static int |
---|
710 | sysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) |
---|
711 | { |
---|
712 | char *p; |
---|
713 | int error, oid[CTL_MAXNAME], len; |
---|
714 | struct sysctl_oid *op = 0; |
---|
715 | |
---|
716 | if (!req->newlen) |
---|
717 | return ENOENT; |
---|
718 | if (req->newlen >= MAXPATHLEN) /* XXX arbitrary, undocumented */ |
---|
719 | return (ENAMETOOLONG); |
---|
720 | |
---|
721 | p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); |
---|
722 | |
---|
723 | error = SYSCTL_IN(req, p, req->newlen); |
---|
724 | if (error) { |
---|
725 | free(p, M_SYSCTL); |
---|
726 | return (error); |
---|
727 | } |
---|
728 | |
---|
729 | p [req->newlen] = '\0'; |
---|
730 | |
---|
731 | error = name2oid(p, oid, &len, &op); |
---|
732 | |
---|
733 | free(p, M_SYSCTL); |
---|
734 | |
---|
735 | if (error) |
---|
736 | return (error); |
---|
737 | |
---|
738 | error = SYSCTL_OUT(req, oid, len * sizeof *oid); |
---|
739 | return (error); |
---|
740 | } |
---|
741 | |
---|
742 | SYSCTL_PROC(_sysctl, 3, name2oid, CTLFLAG_RW|CTLFLAG_ANYBODY, 0, 0, |
---|
743 | sysctl_sysctl_name2oid, "I", ""); |
---|
744 | |
---|
745 | static int |
---|
746 | sysctl_sysctl_oidfmt(SYSCTL_HANDLER_ARGS) |
---|
747 | { |
---|
748 | struct sysctl_oid *oid; |
---|
749 | int error; |
---|
750 | |
---|
751 | error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); |
---|
752 | if (error) |
---|
753 | return (error); |
---|
754 | |
---|
755 | if (!oid->oid_fmt) |
---|
756 | return (ENOENT); |
---|
757 | error = SYSCTL_OUT(req, &oid->oid_kind, sizeof(oid->oid_kind)); |
---|
758 | if (error) |
---|
759 | return (error); |
---|
760 | error = SYSCTL_OUT(req, oid->oid_fmt, strlen(oid->oid_fmt) + 1); |
---|
761 | return (error); |
---|
762 | } |
---|
763 | |
---|
764 | |
---|
765 | SYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, ""); |
---|
766 | |
---|
767 | static int |
---|
768 | sysctl_sysctl_oiddescr(SYSCTL_HANDLER_ARGS) |
---|
769 | { |
---|
770 | struct sysctl_oid *oid; |
---|
771 | int error; |
---|
772 | |
---|
773 | error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); |
---|
774 | if (error) |
---|
775 | return (error); |
---|
776 | |
---|
777 | if (!oid->descr) |
---|
778 | return (ENOENT); |
---|
779 | error = SYSCTL_OUT(req, oid->descr, strlen(oid->descr) + 1); |
---|
780 | return (error); |
---|
781 | } |
---|
782 | |
---|
783 | SYSCTL_NODE(_sysctl, 5, oiddescr, CTLFLAG_RD, sysctl_sysctl_oiddescr, ""); |
---|
784 | |
---|
785 | /* |
---|
786 | * Default "handler" functions. |
---|
787 | */ |
---|
788 | |
---|
789 | /* |
---|
790 | * Handle an int, signed or unsigned. |
---|
791 | * Two cases: |
---|
792 | * a variable: point arg1 at it. |
---|
793 | * a constant: pass it in arg2. |
---|
794 | */ |
---|
795 | |
---|
796 | int |
---|
797 | sysctl_handle_int(SYSCTL_HANDLER_ARGS) |
---|
798 | { |
---|
799 | int tmpout, error = 0; |
---|
800 | |
---|
801 | /* |
---|
802 | * Attempt to get a coherent snapshot by making a copy of the data. |
---|
803 | */ |
---|
804 | if (arg1) |
---|
805 | tmpout = *(int *)arg1; |
---|
806 | else |
---|
807 | tmpout = arg2; |
---|
808 | error = SYSCTL_OUT(req, &tmpout, sizeof(int)); |
---|
809 | |
---|
810 | if (error || !req->newptr) |
---|
811 | return (error); |
---|
812 | |
---|
813 | if (!arg1) |
---|
814 | error = EPERM; |
---|
815 | else |
---|
816 | error = SYSCTL_IN(req, arg1, sizeof(int)); |
---|
817 | return (error); |
---|
818 | } |
---|
819 | |
---|
820 | /* |
---|
821 | * Handle a long, signed or unsigned. arg1 points to it. |
---|
822 | */ |
---|
823 | |
---|
824 | int |
---|
825 | sysctl_handle_long(SYSCTL_HANDLER_ARGS) |
---|
826 | { |
---|
827 | int error = 0; |
---|
828 | long tmpout; |
---|
829 | |
---|
830 | /* |
---|
831 | * Attempt to get a coherent snapshot by making a copy of the data. |
---|
832 | */ |
---|
833 | if (!arg1) |
---|
834 | return (EINVAL); |
---|
835 | tmpout = *(long *)arg1; |
---|
836 | error = SYSCTL_OUT(req, &tmpout, sizeof(long)); |
---|
837 | |
---|
838 | if (error || !req->newptr) |
---|
839 | return (error); |
---|
840 | |
---|
841 | error = SYSCTL_IN(req, arg1, sizeof(long)); |
---|
842 | return (error); |
---|
843 | } |
---|
844 | |
---|
845 | /* |
---|
846 | * Handle our generic '\0' terminated 'C' string. |
---|
847 | * Two cases: |
---|
848 | * a variable string: point arg1 at it, arg2 is max length. |
---|
849 | * a constant string: point arg1 at it, arg2 is zero. |
---|
850 | */ |
---|
851 | |
---|
852 | int |
---|
853 | sysctl_handle_string(SYSCTL_HANDLER_ARGS) |
---|
854 | { |
---|
855 | int error=0; |
---|
856 | char *tmparg; |
---|
857 | size_t outlen; |
---|
858 | |
---|
859 | /* |
---|
860 | * Attempt to get a coherent snapshot by copying to a |
---|
861 | * temporary kernel buffer. |
---|
862 | */ |
---|
863 | retry: |
---|
864 | outlen = strlen((char *)arg1)+1; |
---|
865 | tmparg = malloc(outlen, M_SYSCTLTMP, M_WAITOK); |
---|
866 | |
---|
867 | if (strlcpy(tmparg, (char *)arg1, outlen) >= outlen) { |
---|
868 | free(tmparg, M_SYSCTLTMP); |
---|
869 | goto retry; |
---|
870 | } |
---|
871 | |
---|
872 | error = SYSCTL_OUT(req, tmparg, outlen); |
---|
873 | free(tmparg, M_SYSCTLTMP); |
---|
874 | |
---|
875 | if (error || !req->newptr) |
---|
876 | return (error); |
---|
877 | |
---|
878 | if ((req->newlen - req->newidx) >= arg2) { |
---|
879 | error = EINVAL; |
---|
880 | } else { |
---|
881 | arg2 = (req->newlen - req->newidx); |
---|
882 | error = SYSCTL_IN(req, arg1, arg2); |
---|
883 | ((char *)arg1)[arg2] = '\0'; |
---|
884 | } |
---|
885 | |
---|
886 | return (error); |
---|
887 | } |
---|
888 | |
---|
889 | /* |
---|
890 | * Handle any kind of opaque data. |
---|
891 | * arg1 points to it, arg2 is the size. |
---|
892 | */ |
---|
893 | |
---|
894 | int |
---|
895 | sysctl_handle_opaque(SYSCTL_HANDLER_ARGS) |
---|
896 | { |
---|
897 | int error; |
---|
898 | void *tmparg; |
---|
899 | |
---|
900 | /* |
---|
901 | * Attempt to get a coherent snapshot, either by wiring the |
---|
902 | * user space buffer or copying to a temporary kernel buffer |
---|
903 | * depending on the size of the data. |
---|
904 | */ |
---|
905 | if (arg2 > PAGE_SIZE) { |
---|
906 | sysctl_wire_old_buffer(req, arg2); |
---|
907 | error = SYSCTL_OUT(req, arg1, arg2); |
---|
908 | } else { |
---|
909 | tmparg = malloc(arg2, M_SYSCTLTMP, M_WAITOK); |
---|
910 | bcopy(arg1, tmparg, arg2); |
---|
911 | error = SYSCTL_OUT(req, tmparg, arg2); |
---|
912 | free(tmparg, M_SYSCTLTMP); |
---|
913 | } |
---|
914 | |
---|
915 | if (error || !req->newptr) |
---|
916 | return (error); |
---|
917 | |
---|
918 | error = SYSCTL_IN(req, arg1, arg2); |
---|
919 | |
---|
920 | return (error); |
---|
921 | } |
---|
922 | |
---|
923 | /* |
---|
924 | * Transfer functions to/from kernel space. |
---|
925 | * XXX: rather untested at this point |
---|
926 | */ |
---|
927 | static int |
---|
928 | sysctl_old_kernel(struct sysctl_req *req, const void *p, size_t l) |
---|
929 | { |
---|
930 | size_t i = 0; |
---|
931 | |
---|
932 | if (req->oldptr) { |
---|
933 | i = l; |
---|
934 | if (req->oldlen <= req->oldidx) |
---|
935 | i = 0; |
---|
936 | else |
---|
937 | if (i > req->oldlen - req->oldidx) |
---|
938 | i = req->oldlen - req->oldidx; |
---|
939 | if (i > 0) |
---|
940 | bcopy(p, (char *)req->oldptr + req->oldidx, i); |
---|
941 | } |
---|
942 | req->oldidx += l; |
---|
943 | if (req->oldptr && i != l) |
---|
944 | return (ENOMEM); |
---|
945 | return (0); |
---|
946 | } |
---|
947 | |
---|
948 | static int |
---|
949 | sysctl_new_kernel(struct sysctl_req *req, void *p, size_t l) |
---|
950 | { |
---|
951 | if (!req->newptr) |
---|
952 | return 0; |
---|
953 | if (req->newlen - req->newidx < l) |
---|
954 | return (EINVAL); |
---|
955 | bcopy((char *)req->newptr + req->newidx, p, l); |
---|
956 | req->newidx += l; |
---|
957 | return (0); |
---|
958 | } |
---|
959 | |
---|
960 | int |
---|
961 | kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, |
---|
962 | size_t *oldlenp, void *new, size_t newlen, size_t *retval) |
---|
963 | { |
---|
964 | int error = 0; |
---|
965 | struct sysctl_req req; |
---|
966 | |
---|
967 | bzero(&req, sizeof req); |
---|
968 | |
---|
969 | req.td = td; |
---|
970 | |
---|
971 | if (oldlenp) { |
---|
972 | req.oldlen = *oldlenp; |
---|
973 | } |
---|
974 | |
---|
975 | if (old) { |
---|
976 | req.oldptr= old; |
---|
977 | } |
---|
978 | |
---|
979 | if (new != NULL) { |
---|
980 | req.newlen = newlen; |
---|
981 | req.newptr = new; |
---|
982 | } |
---|
983 | |
---|
984 | req.oldfunc = sysctl_old_kernel; |
---|
985 | req.newfunc = sysctl_new_kernel; |
---|
986 | req.lock = 1; |
---|
987 | |
---|
988 | SYSCTL_LOCK(); |
---|
989 | |
---|
990 | error = sysctl_root(0, name, namelen, &req); |
---|
991 | |
---|
992 | if (req.lock == 2) |
---|
993 | #ifdef __rtems__ |
---|
994 | printf ("kern_sysctl: vsunlock needs to be called!\n"); |
---|
995 | #else |
---|
996 | vsunlock(req.oldptr, req.oldlen); |
---|
997 | #endif |
---|
998 | |
---|
999 | SYSCTL_UNLOCK(); |
---|
1000 | |
---|
1001 | if (error && error != ENOMEM) |
---|
1002 | return (error); |
---|
1003 | |
---|
1004 | if (retval) { |
---|
1005 | if (req.oldptr && req.oldidx > req.oldlen) |
---|
1006 | *retval = req.oldlen; |
---|
1007 | else |
---|
1008 | *retval = req.oldidx; |
---|
1009 | } |
---|
1010 | return (error); |
---|
1011 | } |
---|
1012 | |
---|
1013 | int |
---|
1014 | kernel_sysctlbyname(struct thread *td, char *name, void *old, size_t *oldlenp, |
---|
1015 | void *new, size_t newlen, size_t *retval) |
---|
1016 | { |
---|
1017 | int oid[CTL_MAXNAME]; |
---|
1018 | size_t oidlen, plen; |
---|
1019 | int error; |
---|
1020 | |
---|
1021 | oid[0] = 0; /* sysctl internal magic */ |
---|
1022 | oid[1] = 3; /* name2oid */ |
---|
1023 | oidlen = sizeof(oid); |
---|
1024 | |
---|
1025 | error = kernel_sysctl(td, oid, 2, oid, &oidlen, |
---|
1026 | (void *)name, strlen(name), &plen); |
---|
1027 | if (error) |
---|
1028 | return (error); |
---|
1029 | |
---|
1030 | error = kernel_sysctl(td, oid, plen / sizeof(int), old, oldlenp, |
---|
1031 | new, newlen, retval); |
---|
1032 | return (error); |
---|
1033 | } |
---|
1034 | |
---|
1035 | /* |
---|
1036 | * Transfer function to/from user space. |
---|
1037 | */ |
---|
1038 | static int |
---|
1039 | sysctl_old_user(struct sysctl_req *req, const void *p, size_t l) |
---|
1040 | { |
---|
1041 | int error = 0; |
---|
1042 | size_t i = 0; |
---|
1043 | |
---|
1044 | #ifndef __rtems__ |
---|
1045 | if (req->lock == 1 && req->oldptr) |
---|
1046 | WITNESS_SLEEP(1, NULL); |
---|
1047 | #endif |
---|
1048 | if (req->oldptr) { |
---|
1049 | i = l; |
---|
1050 | if (req->oldlen <= req->oldidx) |
---|
1051 | i = 0; |
---|
1052 | else |
---|
1053 | if (i > req->oldlen - req->oldidx) |
---|
1054 | i = req->oldlen - req->oldidx; |
---|
1055 | if (i > 0) |
---|
1056 | error = copyout(p, (char *)req->oldptr + req->oldidx, |
---|
1057 | i); |
---|
1058 | } |
---|
1059 | req->oldidx += l; |
---|
1060 | if (error) |
---|
1061 | return (error); |
---|
1062 | if (req->oldptr && i < l) |
---|
1063 | return (ENOMEM); |
---|
1064 | return (0); |
---|
1065 | } |
---|
1066 | |
---|
1067 | static int |
---|
1068 | sysctl_new_user(struct sysctl_req *req, void *p, size_t l) |
---|
1069 | { |
---|
1070 | int error; |
---|
1071 | |
---|
1072 | if (!req->newptr) |
---|
1073 | return 0; |
---|
1074 | if (req->newlen - req->newidx < l) |
---|
1075 | return (EINVAL); |
---|
1076 | error = copyin((char *)req->newptr + req->newidx, p, l); |
---|
1077 | req->newidx += l; |
---|
1078 | return (error); |
---|
1079 | } |
---|
1080 | |
---|
1081 | /* |
---|
1082 | * Wire the user space destination buffer. If set to a value greater than |
---|
1083 | * zero, the len parameter limits the maximum amount of wired memory. |
---|
1084 | * |
---|
1085 | * XXX - The len parameter is currently ignored due to the lack of |
---|
1086 | * a place to save it in the sysctl_req structure so that the matching |
---|
1087 | * amount of memory can be unwired in the sysctl exit code. |
---|
1088 | */ |
---|
1089 | void |
---|
1090 | sysctl_wire_old_buffer(struct sysctl_req *req, size_t len) |
---|
1091 | { |
---|
1092 | if (req->lock == 1 && req->oldptr && req->oldfunc == sysctl_old_user) { |
---|
1093 | #ifndef __rtems__ |
---|
1094 | vslock(req->oldptr, req->oldlen); |
---|
1095 | #endif |
---|
1096 | req->lock = 2; |
---|
1097 | } |
---|
1098 | } |
---|
1099 | |
---|
1100 | int |
---|
1101 | sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, |
---|
1102 | int *nindx, struct sysctl_req *req) |
---|
1103 | { |
---|
1104 | struct sysctl_oid *oid; |
---|
1105 | int indx; |
---|
1106 | |
---|
1107 | oid = SLIST_FIRST(&sysctl__children); |
---|
1108 | indx = 0; |
---|
1109 | while (oid && indx < CTL_MAXNAME) { |
---|
1110 | if (oid->oid_number == name[indx]) { |
---|
1111 | indx++; |
---|
1112 | if (oid->oid_kind & CTLFLAG_NOLOCK) |
---|
1113 | req->lock = 0; |
---|
1114 | if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { |
---|
1115 | if (oid->oid_handler != NULL || |
---|
1116 | indx == namelen) { |
---|
1117 | *noid = oid; |
---|
1118 | if (nindx != NULL) |
---|
1119 | *nindx = indx; |
---|
1120 | return (0); |
---|
1121 | } |
---|
1122 | oid = SLIST_FIRST( |
---|
1123 | (struct sysctl_oid_list *)oid->oid_arg1); |
---|
1124 | } else if (indx == namelen) { |
---|
1125 | *noid = oid; |
---|
1126 | if (nindx != NULL) |
---|
1127 | *nindx = indx; |
---|
1128 | return (0); |
---|
1129 | } else { |
---|
1130 | return (ENOTDIR); |
---|
1131 | } |
---|
1132 | } else { |
---|
1133 | oid = SLIST_NEXT(oid, oid_link); |
---|
1134 | } |
---|
1135 | } |
---|
1136 | return (ENOENT); |
---|
1137 | } |
---|
1138 | |
---|
1139 | /* |
---|
1140 | * Traverse our tree, and find the right node, execute whatever it points |
---|
1141 | * to, and return the resulting error code. |
---|
1142 | */ |
---|
1143 | |
---|
1144 | static int |
---|
1145 | sysctl_root(SYSCTL_HANDLER_ARGS) |
---|
1146 | { |
---|
1147 | struct sysctl_oid *oid; |
---|
1148 | int error, indx; |
---|
1149 | |
---|
1150 | error = sysctl_find_oid(arg1, arg2, &oid, &indx, req); |
---|
1151 | if (error) |
---|
1152 | return (error); |
---|
1153 | |
---|
1154 | if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { |
---|
1155 | /* |
---|
1156 | * You can't call a sysctl when it's a node, but has |
---|
1157 | * no handler. Inform the user that it's a node. |
---|
1158 | * The indx may or may not be the same as namelen. |
---|
1159 | */ |
---|
1160 | if (oid->oid_handler == NULL) |
---|
1161 | return (EISDIR); |
---|
1162 | } |
---|
1163 | |
---|
1164 | /* Is this sysctl writable? */ |
---|
1165 | if (req->newptr && !(oid->oid_kind & CTLFLAG_WR)) |
---|
1166 | return (EPERM); |
---|
1167 | |
---|
1168 | #ifndef __rtems__ |
---|
1169 | KASSERT(req->td != NULL, ("sysctl_root(): req->td == NULL")); |
---|
1170 | |
---|
1171 | /* Is this sysctl sensitive to securelevels? */ |
---|
1172 | if (req->newptr && (oid->oid_kind & CTLFLAG_SECURE)) { |
---|
1173 | error = securelevel_gt(req->td->td_ucred, 0); |
---|
1174 | if (error) |
---|
1175 | return (error); |
---|
1176 | } |
---|
1177 | |
---|
1178 | /* Is this sysctl writable by only privileged users? */ |
---|
1179 | if (req->newptr && !(oid->oid_kind & CTLFLAG_ANYBODY)) { |
---|
1180 | int flags; |
---|
1181 | |
---|
1182 | if (oid->oid_kind & CTLFLAG_PRISON) |
---|
1183 | flags = PRISON_ROOT; |
---|
1184 | else |
---|
1185 | flags = 0; |
---|
1186 | error = suser_cred(req->td->td_ucred, flags); |
---|
1187 | if (error) |
---|
1188 | return (error); |
---|
1189 | } |
---|
1190 | #endif |
---|
1191 | |
---|
1192 | if (!oid->oid_handler) |
---|
1193 | return EINVAL; |
---|
1194 | |
---|
1195 | if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) |
---|
1196 | error = oid->oid_handler(oid, (int *)arg1 + indx, arg2 - indx, |
---|
1197 | req); |
---|
1198 | else |
---|
1199 | error = oid->oid_handler(oid, oid->oid_arg1, oid->oid_arg2, |
---|
1200 | req); |
---|
1201 | return (error); |
---|
1202 | } |
---|
1203 | |
---|
1204 | #ifndef _SYS_SYSPROTO_H_ |
---|
1205 | struct sysctl_args { |
---|
1206 | int *name; |
---|
1207 | u_int namelen; |
---|
1208 | void *old; |
---|
1209 | size_t *oldlenp; |
---|
1210 | void *new; |
---|
1211 | size_t newlen; |
---|
1212 | }; |
---|
1213 | #endif |
---|
1214 | |
---|
1215 | /* |
---|
1216 | * MPSAFE |
---|
1217 | */ |
---|
1218 | int |
---|
1219 | __sysctl(struct thread *td, struct sysctl_args *uap) |
---|
1220 | { |
---|
1221 | int error, name[CTL_MAXNAME]; |
---|
1222 | size_t j; |
---|
1223 | |
---|
1224 | if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) |
---|
1225 | return (EINVAL); |
---|
1226 | |
---|
1227 | error = copyin(uap->name, &name, uap->namelen * sizeof(int)); |
---|
1228 | if (error) |
---|
1229 | return (error); |
---|
1230 | |
---|
1231 | mtx_lock(&Giant); |
---|
1232 | |
---|
1233 | error = userland_sysctl(td, name, uap->namelen, |
---|
1234 | uap->old, uap->oldlenp, 0, |
---|
1235 | uap->new, uap->newlen, &j); |
---|
1236 | if (error && error != ENOMEM) |
---|
1237 | goto done2; |
---|
1238 | if (uap->oldlenp) { |
---|
1239 | int i = copyout(&j, uap->oldlenp, sizeof(j)); |
---|
1240 | if (i) |
---|
1241 | error = i; |
---|
1242 | } |
---|
1243 | done2: |
---|
1244 | mtx_unlock(&Giant); |
---|
1245 | return (error); |
---|
1246 | } |
---|
1247 | |
---|
1248 | /* |
---|
1249 | * This is used from various compatibility syscalls too. That's why name |
---|
1250 | * must be in kernel space. |
---|
1251 | */ |
---|
1252 | int |
---|
1253 | userland_sysctl(struct thread *td, int *name, u_int namelen, void *old, |
---|
1254 | size_t *oldlenp, int inkernel, void *new, size_t newlen, size_t *retval) |
---|
1255 | { |
---|
1256 | int error = 0; |
---|
1257 | struct sysctl_req req, req2; |
---|
1258 | |
---|
1259 | bzero(&req, sizeof req); |
---|
1260 | |
---|
1261 | req.td = td; |
---|
1262 | |
---|
1263 | if (oldlenp) { |
---|
1264 | if (inkernel) { |
---|
1265 | req.oldlen = *oldlenp; |
---|
1266 | } else { |
---|
1267 | error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); |
---|
1268 | if (error) |
---|
1269 | return (error); |
---|
1270 | } |
---|
1271 | } |
---|
1272 | |
---|
1273 | if (old) { |
---|
1274 | #ifndef __rtems__ |
---|
1275 | if (!useracc(old, req.oldlen, VM_PROT_WRITE)) |
---|
1276 | return (EFAULT); |
---|
1277 | #endif |
---|
1278 | req.oldptr= old; |
---|
1279 | } |
---|
1280 | |
---|
1281 | if (new != NULL) { |
---|
1282 | #ifndef __rtems__ |
---|
1283 | if (!useracc(new, req.newlen, VM_PROT_READ)) |
---|
1284 | return (EFAULT); |
---|
1285 | #endif |
---|
1286 | req.newlen = newlen; |
---|
1287 | req.newptr = new; |
---|
1288 | } |
---|
1289 | |
---|
1290 | req.oldfunc = sysctl_old_user; |
---|
1291 | req.newfunc = sysctl_new_user; |
---|
1292 | req.lock = 1; |
---|
1293 | |
---|
1294 | SYSCTL_LOCK(); |
---|
1295 | |
---|
1296 | #ifdef MAC |
---|
1297 | error = mac_check_system_sysctl(td->td_ucred, name, namelen, old, |
---|
1298 | oldlenp, inkernel, new, newlen); |
---|
1299 | if (error) { |
---|
1300 | SYSCTL_UNLOCK(); |
---|
1301 | return (error); |
---|
1302 | } |
---|
1303 | #endif |
---|
1304 | |
---|
1305 | do { |
---|
1306 | req2 = req; |
---|
1307 | error = sysctl_root(0, name, namelen, &req2); |
---|
1308 | } while (error == EAGAIN); |
---|
1309 | |
---|
1310 | req = req2; |
---|
1311 | #ifndef __rtems__ |
---|
1312 | if (req.lock == 2) |
---|
1313 | vsunlock(req.oldptr, req.oldlen); |
---|
1314 | #endif |
---|
1315 | |
---|
1316 | SYSCTL_UNLOCK(); |
---|
1317 | |
---|
1318 | if (error && error != ENOMEM) |
---|
1319 | return (error); |
---|
1320 | |
---|
1321 | if (retval) { |
---|
1322 | if (req.oldptr && req.oldidx > req.oldlen) |
---|
1323 | *retval = req.oldlen; |
---|
1324 | else |
---|
1325 | *retval = req.oldidx; |
---|
1326 | } |
---|
1327 | return (error); |
---|
1328 | } |
---|
1329 | |
---|
1330 | #ifdef COMPAT_43 |
---|
1331 | #include <sys/socket.h> |
---|
1332 | #include <vm/vm_param.h> |
---|
1333 | |
---|
1334 | #define KINFO_PROC (0<<8) |
---|
1335 | #define KINFO_RT (1<<8) |
---|
1336 | #define KINFO_VNODE (2<<8) |
---|
1337 | #define KINFO_FILE (3<<8) |
---|
1338 | #define KINFO_METER (4<<8) |
---|
1339 | #define KINFO_LOADAVG (5<<8) |
---|
1340 | #define KINFO_CLOCKRATE (6<<8) |
---|
1341 | |
---|
1342 | /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ |
---|
1343 | #define KINFO_BSDI_SYSINFO (101<<8) |
---|
1344 | |
---|
1345 | /* |
---|
1346 | * XXX this is bloat, but I hope it's better here than on the potentially |
---|
1347 | * limited kernel stack... -Peter |
---|
1348 | */ |
---|
1349 | |
---|
1350 | static struct { |
---|
1351 | int bsdi_machine; /* "i386" on BSD/386 */ |
---|
1352 | /* ^^^ this is an offset to the string, relative to the struct start */ |
---|
1353 | char *pad0; |
---|
1354 | long pad1; |
---|
1355 | long pad2; |
---|
1356 | long pad3; |
---|
1357 | u_long pad4; |
---|
1358 | u_long pad5; |
---|
1359 | u_long pad6; |
---|
1360 | |
---|
1361 | int bsdi_ostype; /* "BSD/386" on BSD/386 */ |
---|
1362 | int bsdi_osrelease; /* "1.1" on BSD/386 */ |
---|
1363 | long pad7; |
---|
1364 | long pad8; |
---|
1365 | char *pad9; |
---|
1366 | |
---|
1367 | long pad10; |
---|
1368 | long pad11; |
---|
1369 | int pad12; |
---|
1370 | long pad13; |
---|
1371 | quad_t pad14; |
---|
1372 | long pad15; |
---|
1373 | |
---|
1374 | struct timeval pad16; |
---|
1375 | /* we dont set this, because BSDI's uname used gethostname() instead */ |
---|
1376 | int bsdi_hostname; /* hostname on BSD/386 */ |
---|
1377 | |
---|
1378 | /* the actual string data is appended here */ |
---|
1379 | |
---|
1380 | } bsdi_si; |
---|
1381 | /* |
---|
1382 | * this data is appended to the end of the bsdi_si structure during copyout. |
---|
1383 | * The "char *" offsets are relative to the base of the bsdi_si struct. |
---|
1384 | * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings |
---|
1385 | * should not exceed the length of the buffer here... (or else!! :-) |
---|
1386 | */ |
---|
1387 | static char bsdi_strings[80]; /* It had better be less than this! */ |
---|
1388 | |
---|
1389 | #ifndef _SYS_SYSPROTO_H_ |
---|
1390 | struct getkerninfo_args { |
---|
1391 | int op; |
---|
1392 | char *where; |
---|
1393 | size_t *size; |
---|
1394 | int arg; |
---|
1395 | }; |
---|
1396 | #endif |
---|
1397 | |
---|
1398 | /* |
---|
1399 | * MPSAFE |
---|
1400 | */ |
---|
1401 | int |
---|
1402 | ogetkerninfo(struct thread *td, struct getkerninfo_args *uap) |
---|
1403 | { |
---|
1404 | int error, name[6]; |
---|
1405 | size_t size; |
---|
1406 | u_int needed = 0; |
---|
1407 | |
---|
1408 | mtx_lock(&Giant); |
---|
1409 | |
---|
1410 | switch (uap->op & 0xff00) { |
---|
1411 | |
---|
1412 | case KINFO_RT: |
---|
1413 | name[0] = CTL_NET; |
---|
1414 | name[1] = PF_ROUTE; |
---|
1415 | name[2] = 0; |
---|
1416 | name[3] = (uap->op & 0xff0000) >> 16; |
---|
1417 | name[4] = uap->op & 0xff; |
---|
1418 | name[5] = uap->arg; |
---|
1419 | error = userland_sysctl(td, name, 6, uap->where, uap->size, |
---|
1420 | 0, 0, 0, &size); |
---|
1421 | break; |
---|
1422 | |
---|
1423 | case KINFO_VNODE: |
---|
1424 | name[0] = CTL_KERN; |
---|
1425 | name[1] = KERN_VNODE; |
---|
1426 | error = userland_sysctl(td, name, 2, uap->where, uap->size, |
---|
1427 | 0, 0, 0, &size); |
---|
1428 | break; |
---|
1429 | |
---|
1430 | case KINFO_PROC: |
---|
1431 | name[0] = CTL_KERN; |
---|
1432 | name[1] = KERN_PROC; |
---|
1433 | name[2] = uap->op & 0xff; |
---|
1434 | name[3] = uap->arg; |
---|
1435 | error = userland_sysctl(td, name, 4, uap->where, uap->size, |
---|
1436 | 0, 0, 0, &size); |
---|
1437 | break; |
---|
1438 | |
---|
1439 | case KINFO_FILE: |
---|
1440 | name[0] = CTL_KERN; |
---|
1441 | name[1] = KERN_FILE; |
---|
1442 | error = userland_sysctl(td, name, 2, uap->where, uap->size, |
---|
1443 | 0, 0, 0, &size); |
---|
1444 | break; |
---|
1445 | |
---|
1446 | case KINFO_METER: |
---|
1447 | name[0] = CTL_VM; |
---|
1448 | name[1] = VM_METER; |
---|
1449 | error = userland_sysctl(td, name, 2, uap->where, uap->size, |
---|
1450 | 0, 0, 0, &size); |
---|
1451 | break; |
---|
1452 | |
---|
1453 | case KINFO_LOADAVG: |
---|
1454 | name[0] = CTL_VM; |
---|
1455 | name[1] = VM_LOADAVG; |
---|
1456 | error = userland_sysctl(td, name, 2, uap->where, uap->size, |
---|
1457 | 0, 0, 0, &size); |
---|
1458 | break; |
---|
1459 | |
---|
1460 | case KINFO_CLOCKRATE: |
---|
1461 | name[0] = CTL_KERN; |
---|
1462 | name[1] = KERN_CLOCKRATE; |
---|
1463 | error = userland_sysctl(td, name, 2, uap->where, uap->size, |
---|
1464 | 0, 0, 0, &size); |
---|
1465 | break; |
---|
1466 | |
---|
1467 | case KINFO_BSDI_SYSINFO: { |
---|
1468 | /* |
---|
1469 | * this is pretty crude, but it's just enough for uname() |
---|
1470 | * from BSDI's 1.x libc to work. |
---|
1471 | * |
---|
1472 | * *size gives the size of the buffer before the call, and |
---|
1473 | * the amount of data copied after a successful call. |
---|
1474 | * If successful, the return value is the amount of data |
---|
1475 | * available, which can be larger than *size. |
---|
1476 | * |
---|
1477 | * BSDI's 2.x product apparently fails with ENOMEM if *size |
---|
1478 | * is too small. |
---|
1479 | */ |
---|
1480 | |
---|
1481 | u_int left; |
---|
1482 | char *s; |
---|
1483 | |
---|
1484 | bzero((char *)&bsdi_si, sizeof(bsdi_si)); |
---|
1485 | bzero(bsdi_strings, sizeof(bsdi_strings)); |
---|
1486 | |
---|
1487 | s = bsdi_strings; |
---|
1488 | |
---|
1489 | bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); |
---|
1490 | strcpy(s, ostype); |
---|
1491 | s += strlen(s) + 1; |
---|
1492 | |
---|
1493 | bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); |
---|
1494 | strcpy(s, osrelease); |
---|
1495 | s += strlen(s) + 1; |
---|
1496 | |
---|
1497 | bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); |
---|
1498 | strcpy(s, machine); |
---|
1499 | s += strlen(s) + 1; |
---|
1500 | |
---|
1501 | needed = sizeof(bsdi_si) + (s - bsdi_strings); |
---|
1502 | |
---|
1503 | if ((uap->where == NULL) || (uap->size == NULL)) { |
---|
1504 | /* process is asking how much buffer to supply.. */ |
---|
1505 | size = needed; |
---|
1506 | error = 0; |
---|
1507 | break; |
---|
1508 | } |
---|
1509 | |
---|
1510 | if ((error = copyin(uap->size, &size, sizeof(size))) != 0) |
---|
1511 | break; |
---|
1512 | |
---|
1513 | /* if too much buffer supplied, trim it down */ |
---|
1514 | if (size > needed) |
---|
1515 | size = needed; |
---|
1516 | |
---|
1517 | /* how much of the buffer is remaining */ |
---|
1518 | left = size; |
---|
1519 | |
---|
1520 | if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) |
---|
1521 | break; |
---|
1522 | |
---|
1523 | /* is there any point in continuing? */ |
---|
1524 | if (left > sizeof(bsdi_si)) { |
---|
1525 | left -= sizeof(bsdi_si); |
---|
1526 | error = copyout(&bsdi_strings, |
---|
1527 | uap->where + sizeof(bsdi_si), left); |
---|
1528 | } |
---|
1529 | break; |
---|
1530 | } |
---|
1531 | |
---|
1532 | default: |
---|
1533 | error = EOPNOTSUPP; |
---|
1534 | break; |
---|
1535 | } |
---|
1536 | if (error == 0) { |
---|
1537 | td->td_retval[0] = needed ? needed : size; |
---|
1538 | if (uap->size) { |
---|
1539 | error = copyout(&size, uap->size, sizeof(size)); |
---|
1540 | } |
---|
1541 | } |
---|
1542 | mtx_unlock(&Giant); |
---|
1543 | return (error); |
---|
1544 | } |
---|
1545 | #endif /* COMPAT_43 */ |
---|