minix/kernel/system/do_statectl.c

   1 /* The kernel call implemented in this file:
   2  *   m_type:    SYS_STATECTL
   3  *
   4  * The parameters for this kernel call are:
   5  *   m_lsys_krn_sys_statectl.request    (state control request)
   6  */
   7
   8 #include "kernel/system.h"
   9
  10 #if USE_STATECTL
  11
  12 /*===========================================================================*
  13  *                                do_statectl                                *
  14  *===========================================================================*/
  15 int do_statectl(struct proc * caller, message * m_ptr)
  16 {
  17 /* Handle sys_statectl(). A process has issued a state control request. */
  18
  19   switch(m_ptr->m_lsys_krn_sys_statectl.request)
  20   {
  21   case SYS_STATE_CLEAR_IPC_REFS:
  22         /* Clear IPC references for all the processes communicating
  23          * with the caller.
  24          */
  25         clear_ipc_refs(caller, EDEADSRCDST);
  26         return(OK);
  27   case SYS_STATE_SET_STATE_TABLE:
  28         /* Set state table for the caller. */
  29         priv(caller)->s_state_table = (vir_bytes) m_ptr->m_lsys_krn_sys_statectl.address;
  30         priv(caller)->s_state_entries = m_ptr->m_lsys_krn_sys_statectl.length;
  31         return(OK);
  32   case SYS_STATE_ADD_IPC_BL_FILTER:
  33         /* Add an IPC blacklist filter for the caller. */
  34         return add_ipc_filter(caller, IPCF_BLACKLIST,
  35             (vir_bytes) m_ptr->m_lsys_krn_sys_statectl.address,
  36             m_ptr->m_lsys_krn_sys_statectl.length);
  37   case SYS_STATE_ADD_IPC_WL_FILTER:
  38         /* Add an IPC whitelist filter for the caller. */
  39         return add_ipc_filter(caller, IPCF_WHITELIST,
  40             (vir_bytes) m_ptr->m_lsys_krn_sys_statectl.address,
  41             m_ptr->m_lsys_krn_sys_statectl.length);
  42   case SYS_STATE_CLEAR_IPC_FILTERS:
  43         /* Clear any IPC filter for the caller. */
  44         clear_ipc_filters(caller);
  45         return OK;
  46   default:
  47         printf("do_statectl: bad request %d\n",
  48                 m_ptr->m_lsys_krn_sys_statectl.request);
  49         return EINVAL;
  50   }
  51 }
  52
  53 #endif /* USE_STATECTL */