linux_sysctl.c

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    1 /*-
    2  * Copyright (c) 2001 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/5.1/sys/compat/linux/linux_sysctl.c 111798 2003-03-03 09:17:12Z des $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/lock.h>
   33 #include <sys/malloc.h>
   34 #include <sys/mutex.h>
   35 #include <sys/proc.h>
   36 #include <sys/sysctl.h>
   37 #include <sys/systm.h>
   38 #include <sys/sbuf.h>
   39 
   40 #include <machine/../linux/linux.h>
   41 #include <machine/../linux/linux_proto.h>
   42 
   43 #include <compat/linux/linux_util.h>
   44 
   45 #define LINUX_CTL_KERN          1
   46 #define LINUX_CTL_VM            2
   47 #define LINUX_CTL_NET           3
   48 #define LINUX_CTL_PROC          4
   49 #define LINUX_CTL_FS            5
   50 #define LINUX_CTL_DEBUG         6
   51 #define LINUX_CTL_DEV           7
   52 #define LINUX_CTL_BUS           8
   53 
   54 /* CTL_KERN names */
   55 #define LINUX_KERN_OSTYPE       1
   56 #define LINUX_KERN_OSRELEASE    2
   57 #define LINUX_KERN_OSREV        3
   58 #define LINUX_KERN_VERSION      4
   59 
   60 static int
   61 handle_string(struct l___sysctl_args *la, char *value)
   62 {
   63         int error;
   64 
   65         if (la->oldval != NULL) {
   66                 l_int len = strlen(value);
   67                 error = copyout(value, la->oldval, len + 1);
   68                 if (!error && la->oldlenp != NULL)
   69                         error = copyout(&len, la->oldlenp, sizeof(len));
   70                 if (error)
   71                         return (error);
   72         }
   73 
   74         if (la->newval != NULL)
   75                 return (ENOTDIR);
   76 
   77         return (0);
   78 }
   79 
   80 int
   81 linux_sysctl(struct thread *td, struct linux_sysctl_args *args)
   82 {
   83         struct l___sysctl_args la;
   84         struct sbuf *sb;
   85         l_int *mib;
   86         int error, i;
   87 
   88         error = copyin(args->args, &la, sizeof(la));
   89         if (error)
   90                 return (error);
   91 
   92         if (la.nlen <= 0 || la.nlen > LINUX_CTL_MAXNAME)
   93                 return (ENOTDIR);
   94 
   95         mib = malloc(la.nlen * sizeof(l_int), M_TEMP, M_WAITOK);
   96         error = copyin(la.name, mib, la.nlen * sizeof(l_int));
   97         if (error) {
   98                 free(mib, M_TEMP);
   99                 return (error);
  100         }
  101 
  102         switch (mib[0]) {
  103         case LINUX_CTL_KERN:
  104                 if (la.nlen < 2)
  105                         break;
  106 
  107                 switch (mib[1]) {
  108                 case LINUX_KERN_VERSION:
  109                         error = handle_string(&la, version);
  110                         free(mib, M_TEMP);
  111                         return (error);
  112                 default:
  113                         break;
  114                 }
  115                 break;
  116         default:
  117                 break;
  118         }
  119 
  120         sb = sbuf_new(NULL, NULL, 20 + la.nlen * 5, SBUF_AUTOEXTEND);
  121         if (sb == NULL) {
  122                 linux_msg(td, "sysctl is not implemented");
  123         } else {
  124                 sbuf_printf(sb, "sysctl ");
  125                 for (i = 0; i < la.nlen; i++)
  126                         sbuf_printf(sb, "%c%d", (i) ? ',' : '{', mib[i]);
  127                 sbuf_printf(sb, "} is not implemented");
  128                 sbuf_finish(sb);
  129                 linux_msg(td, "%s", sbuf_data(sb));
  130                 sbuf_delete(sb);
  131         }
  132 
  133         free(mib, M_TEMP);
  134         return (ENOTDIR);
  135 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_sysctl.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_sysctl.c