kern_sysctl.c

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/*****************************************************************************************
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 $Id: kern__sysctl_8c-source.html 88 2016-01-12 00:11:29Z reddawg $

*****************************************************************************************/

#include <ubixos/types.h>
#include <sys/sysproto.h>
#include <sys/thread.h>
#include <sys/kern_sysctl.h>
#include <ubixos/endtask.h>
#include <ubixos/kpanic.h>
#include <lib/kprintf.h>
#include <lib/kmalloc.h>
#include <assert.h>
#include <string.h>

static struct sysctl_entry *ctls = 0x0;

static struct sysctl_entry *sysctl_find(int *,int);

/* This is a cheat for now */
static void def_ctls() {
  int name[CTL_MAXNAME], name_len;
  uInt32 page_val = 0x1000;
  name[0] = 6;
  name[1] = 7;
  name_len = 2; 
  sysctl_add(name,name_len,"page_size",&page_val,sizeof(uInt32));
  /* Clock Rate */
  name[0] = 1;
  name [1] = 12;
  page_val = 0x3E8;
  sysctl_add(name,name_len,"page_size",&page_val,sizeof(uInt32));
  /* User Stack */
  name[0] = 1;
  name [1] = 33;
  page_val = 0xCBE8000;
  sysctl_add(name,name_len,"page_size",&page_val,sizeof(uInt32));
  }

int sysctl_init() {
  struct sysctl_entry *tmpCtl = 0x0;
  if (ctls != 0x0) {
    kprintf("sysctl already Initialized\n");
    while (1);
    }

  ctls = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  ctls->prev     = 0x0;
  ctls->id       = CTL_UNSPEC;
  ctls->children = 0x0;
  sprintf(ctls->name,"unspec");

  tmpCtl = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->prev     = ctls;
  tmpCtl->id       = CTL_KERN;
  tmpCtl->children = 0x0;
  sprintf(tmpCtl->name,"kern");
  ctls->next = tmpCtl;

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_VM;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"vm");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_VFS;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"vfs");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_NET;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"net");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_DEBUG;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"debug");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_HW;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"hw");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_MACHDEP;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"machdep");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_USER;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"user");

  tmpCtl->next = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_P1003_1B;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"p1003_1b");

  tmpCtl->next = (struct sysctl_enctry *)kmalloc(sizeof(struct sysctl_entry));
  tmpCtl->next->prev = tmpCtl;
  tmpCtl             = tmpCtl->next;
  tmpCtl->id         = CTL_UBIX;
  tmpCtl->children   = 0x0;
  sprintf(tmpCtl->name,"ubix");

  def_ctls();

  return(0x0);
  }

int __sysctl(struct thread *td, struct sysctl_args *uap) {
  struct sysctl_entry *tmpCtl = 0x0;
  int i = 0;

  if (ctls == 0x0)
    K_PANIC("sysctl not initialized");

  if (uap->newlen < 0) {
    kprintf("Changing Not supported yet.\n");
    endTask(_current->id);
    }

  tmpCtl = sysctl_find(uap->name,uap->namelen);
  if (tmpCtl == 0x0) { 
    kprintf("Invalid CTL\n");
    for (i = 0x0;i < uap->namelen;i++)
      kprintf("(%i)",uap->name[i]);
    kprintf("\n");
    endTask(_current->id);
    }

  if ((uint32_t)uap->oldlenp < tmpCtl->val_len) 
     memcpy(uap->old,tmpCtl->value,(uInt32)uap->oldlenp);
  else
     memcpy(uap->old,tmpCtl->value,tmpCtl->val_len);

  td->td_retval[0] = 0x0;

  return(0x0);
  }

static struct sysctl_entry *sysctl_find(int *name,int namelen) {
  int i = 0x0;
  struct sysctl_entry *tmpCtl = 0x0;
  struct sysctl_entry *lCtl = ctls;

  /* Loop Name Len */
  for (i = 0x0; i < namelen;i++) {
    for (tmpCtl = lCtl;tmpCtl != 0x0;tmpCtl = tmpCtl->next) {
      //kprintf("ctlName: [%s], ctlId; [%i]\n",tmpCtl->name,tmpCtl->id);
      if (tmpCtl->id == name[i]) {
         if ((i+1) == namelen) {
           return(tmpCtl);
           }
         lCtl = tmpCtl->children;
         break;
         }
      }
    }
  return(0x0);
  }

int sysctl_add(int *name,int namelen,char *str_name,void *buf,int buf_size) {
  struct sysctl_entry *tmpCtl = 0x0;
  struct sysctl_entry *newCtl = 0x0;

  /* Check if it exists */
  tmpCtl = sysctl_find(name,namelen);
  if (tmpCtl != 0x0) {
    kprintf("Node Exists!\n");
    while (1);
    }

  /* Get Parent Node */
  tmpCtl = sysctl_find(name,namelen-1);
  if (tmpCtl == 0x0) {
    kprintf("Parent Node Non Existant\n");
    return(-1);
    }
  if (tmpCtl->children == 0x0) {
    tmpCtl->children = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry));
    tmpCtl->children->children = 0x0;
    tmpCtl->children->prev     = 0x0;
    tmpCtl->children->next     = 0x0;
    tmpCtl->children->id       = name[namelen-1];
    sprintf(tmpCtl->children->name,str_name);
    tmpCtl->children->value = (void  *)kmalloc(buf_size);
    memcpy(tmpCtl->children->value,buf,buf_size);
    tmpCtl->children->val_len = buf_size;
    }
  else {
    newCtl = (struct sysctl_entry *)kmalloc(sizeof(struct sysctl_entry)); 
    newCtl->prev     = 0x0;
    newCtl->next     = tmpCtl->children;
    newCtl->children = 0x0;
    newCtl->id       = name[namelen-1];
    sprintf(newCtl->name,str_name);
    newCtl->value    = (void *)kmalloc(buf_size);
    memcpy(newCtl->value,buf,buf_size);
    newCtl->val_len  = buf_size;
    tmpCtl->children->prev = newCtl;
    tmpCtl->children = newCtl;
    }

  return(0x0);
  }


/***
 END
 ***/

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