示例#1
0
/*===========================================================================*
 *				main                                         *
 *===========================================================================*/
PUBLIC int main(int argc, char **argv)
{
/* This is the main routine of this service. The main loop consists of 
 * three major activities: getting new work, processing the work, and
 * sending the reply. The loop never terminates, unless a panic occurs.
 */
  message m;
  int result;                 
  sigset_t sigset;

  /* Initialize the server, then go to work. */
  init_server(argc, argv);

  /* Main loop - get work and do it, forever. */         
  while (TRUE) {              

      /* Wait for incoming message, sets 'callnr' and 'who'. */
      get_work(&m);

      switch (callnr) {
      case PROC_EVENT:
	  sig_handler();
          continue;
      case DS_PUBLISH:
          result = do_publish(&m);
          break;
      case DS_RETRIEVE:
	  result = do_retrieve(&m);
	  break;
      case DS_SUBSCRIBE:
	  result = do_subscribe(&m);
	  break;
      case GETSYSINFO:
	  result = do_getsysinfo(&m);
	  break;
      default: 
          report("DS","warning, got illegal request from:", m.m_source);
          result = EINVAL;
      }

      /* Finally send reply message, unless disabled. */
      if (result != EDONTREPLY) {
          m.m_type = result;  		/* build reply message */
	  reply(who_e, &m);		/* send it away */
      }
  }
  return(OK);				/* shouldn't come here */
}
示例#2
0
/*===========================================================================*
 *				main                                         *
 *===========================================================================*/
PUBLIC int main(int argc, char **argv)
{
/* This is the main routine of this service. The main loop consists of 
 * three major activities: getting new work, processing the work, and
 * sending the reply. The loop never terminates, unless a panic occurs.
 */
  message m;
  int result;                 

  /* SEF local startup. */
  env_setargs(argc, argv);
  sef_local_startup();

  /* Main loop - get work and do it, forever. */         
  while (TRUE) {              

      /* Wait for incoming message, sets 'callnr' and 'who'. */
      get_work(&m);

      if (is_notify(callnr)) {
          printf("DS: warning, got illegal notify from: %d\n", m.m_source);
          result = EINVAL;
          goto send_reply;
      }

      switch (callnr) {
      case DS_PUBLISH:
          result = do_publish(&m);
          break;
      case DS_RETRIEVE:
	  result = do_retrieve(&m);
	  break;
      case DS_RETRIEVE_LABEL:
	  result = do_retrieve_label(&m);
	  break;
      case DS_DELETE:
	  result = do_delete(&m);
	  break;
      case DS_SUBSCRIBE:
	  result = do_subscribe(&m);
	  break;
      case DS_CHECK:
	  result = do_check(&m);
	  break;
      case DS_SNAPSHOT:
	  result = do_snapshot(&m);
	  break;
      case GETSYSINFO:
	  result = do_getsysinfo(&m);
	  break;
      default: 
          printf("DS: warning, got illegal request from %d\n", m.m_source);
          result = EINVAL;
      }

send_reply:
      /* Finally send reply message, unless disabled. */
      if (result != EDONTREPLY) {
          m.m_type = result;  		/* build reply message */
	  reply(who_e, &m);		/* send it away */
      }
  }
  return(OK);				/* shouldn't come here */
}
示例#3
0
文件: main.c 项目: Sciumo/minix
/*===========================================================================*
 *			       do_work					     *
 *===========================================================================*/
static void *do_work(void *arg)
{
  int error;
  struct job my_job;

  my_job = *((struct job *) arg);
  fp = my_job.j_fp;

  lock_proc(fp, 0); /* This proc is busy */

  if (job_call_nr == MAPDRIVER) {
	error = do_mapdriver();
  } else if (job_call_nr == COMMON_GETSYSINFO) {
	error = do_getsysinfo();
  } else if (IS_PFS_VFS_RQ(job_call_nr)) {
	if (who_e != PFS_PROC_NR) {
		printf("VFS: only PFS is allowed to make nested VFS calls\n");
		error = ENOSYS;
	} else if (job_call_nr <= PFS_BASE ||
		   job_call_nr >= PFS_BASE + PFS_NREQS) {
		error = ENOSYS;
	} else {
		job_call_nr -= PFS_BASE;
		error = (*pfs_call_vec[job_call_nr])();
	}
  } else {
	/* We're dealing with a POSIX system call from a normal
	 * process. Call the internal function that does the work.
	 */
	if (job_call_nr < 0 || job_call_nr >= NCALLS) {
		error = ENOSYS;
	} else if (fp->fp_pid == PID_FREE) {
		/* Process vanished before we were able to handle request.
		 * Replying has no use. Just drop it. */
		error = SUSPEND;
	} else {
#if ENABLE_SYSCALL_STATS
		calls_stats[job_call_nr]++;
#endif
		error = (*call_vec[job_call_nr])();
	}
  }

  /* Copy the results back to the user and send reply. */
  if (error != SUSPEND) {

	if ((fp->fp_flags & FP_SYS_PROC)) {
		struct vmnt *vmp;

		if ((vmp = find_vmnt(fp->fp_endpoint)) != NULL)
			vmp->m_flags &= ~VMNT_CALLBACK;
	}

	if (deadlock_resolving) {
		if (fp->fp_wtid == dl_worker.w_tid)
			deadlock_resolving = 0;
	}

	reply(fp->fp_endpoint, error);
  }

  thread_cleanup(fp);
  return(NULL);
}
示例#4
0
文件: main.c 项目: mwilbur/minix
/*===========================================================================*
 *				main                                         *
 *===========================================================================*/
PUBLIC int main(void)
{
/* This is the main routine of this service. The main loop consists of 
 * three major activities: getting new work, processing the work, and
 * sending the reply. The loop never terminates, unless a panic occurs.
 */
  message m;					/* request message */
  int ipc_status;				/* status code */
  int call_nr, who_e,who_p;			/* call number and caller */
  int result;                 			/* result to return */
  int s;

  /* SEF local startup. */
  sef_local_startup();
  
  if (OK != (s=sys_getmachine(&machine)))
	  panic("couldn't get machine info: %d", s);

  /* Main loop - get work and do it, forever. */         
  while (TRUE) {              

      /* Wait for request message. */
      get_work(&m, &ipc_status);
      who_e = m.m_source;
      if(rs_isokendpt(who_e, &who_p) != OK) {
          panic("message from bogus source: %d", who_e);
      }

      call_nr = m.m_type;

      /* Now determine what to do.  Four types of requests are expected:
       * - Heartbeat messages (notifications from registered system services)
       * - System notifications (synchronous alarm)
       * - User requests (control messages to manage system services)
       * - Ready messages (reply messages from registered services)
       */

      /* Notification messages are control messages and do not need a reply.
       * These include heartbeat messages and system notifications.
       */
      if (is_ipc_notify(ipc_status)) {
          switch (who_p) {
          case CLOCK:
	      do_period(&m);			/* check services status */
	      continue;
	  default:				/* heartbeat notification */
	      if (rproc_ptr[who_p] != NULL) {	/* mark heartbeat time */ 
		  rproc_ptr[who_p]->r_alive_tm = m.NOTIFY_TIMESTAMP;
	      } else {
		  printf("RS: warning: got unexpected notify message from %d\n",
		      m.m_source);
	      }
	  }
      }

      /* If we get this far, this is a normal request.
       * Handle the request and send a reply to the caller. 
       */
      else {
	  if (call_nr != COMMON_GETSYSINFO && 
	  	(call_nr < RS_RQ_BASE || call_nr >= RS_RQ_BASE+0x100))
	  {
		/* Ignore invalid requests. Do not try to reply. */
		printf("RS: warning: got invalid request %d from endpoint %d\n",
			call_nr, m.m_source);
		continue;
	  }

          /* Handler functions are responsible for permission checking. */
          switch(call_nr) {
          /* User requests. */
	  case RS_UP:		result = do_up(&m);		break;
          case RS_DOWN: 	result = do_down(&m); 		break;
          case RS_REFRESH: 	result = do_refresh(&m); 	break;
          case RS_RESTART: 	result = do_restart(&m); 	break;
          case RS_SHUTDOWN: 	result = do_shutdown(&m); 	break;
          case RS_UPDATE: 	result = do_update(&m); 	break;
          case RS_CLONE: 	result = do_clone(&m); 		break;
          case RS_EDIT: 	result = do_edit(&m); 		break;
          case COMMON_GETSYSINFO: 
         			result = do_getsysinfo(&m); 	break;
	  case RS_LOOKUP:	result = do_lookup(&m);		break;
	  /* Ready messages. */
	  case RS_INIT: 	result = do_init_ready(&m); 	break;
	  case RS_LU_PREPARE: 	result = do_upd_ready(&m); 	break;
          default: 
              printf("RS: warning: got unexpected request %d from %d\n",
                  m.m_type, m.m_source);
              result = EINVAL;
          }

          /* Finally send reply message, unless disabled. */
          if (result != EDONTREPLY) {
	      m.m_type = result;
              reply(who_e, NULL, &m);
          }
      }
  }
}
示例#5
0
/*===========================================================================*
 *				main                                         *
 *===========================================================================*/
PUBLIC int main(void)
{
/* This is the main routine of this service. The main loop consists of 
 * three major activities: getting new work, processing the work, and
 * sending the reply. The loop never terminates, unless a panic occurs.
 */
  message m;					/* request message */
  int call_nr, who_e,who_p;			/* call number and caller */
  int result;                 			/* result to return */
  sigset_t sigset;				/* system signal set */
  int s;

  /* Initialize the server, then go to work. */
  init_server();	

  /* Main loop - get work and do it, forever. */         
  while (TRUE) {              

      /* Wait for request message. */
      get_work(&m);
      who_e = m.m_source;
      who_p = _ENDPOINT_P(who_e);
      if(who_p < -NR_TASKS || who_p >= NR_PROCS)
	panic("RS","message from bogus source", who_e);

      call_nr = m.m_type;

      /* Now determine what to do.  Three types of requests are expected: 
       * - Heartbeat messages (notifications from registered system services)
       * - System notifications (POSIX signals or synchronous alarm)
       * - User requests (control messages to manage system services)
       */

      /* Notification messages are control messages and do not need a reply.
       * These include heartbeat messages and system notifications.
       */
      if (m.m_type & NOTIFY_MESSAGE) {
          switch (call_nr) {
          case SYN_ALARM:
	      do_period(&m);			/* check drivers status */
	      continue;				
          case PROC_EVENT:
	      sig_handler();
              continue;				
	  default:				/* heartbeat notification */
	      if (rproc_ptr[who_p] != NULL)	/* mark heartbeat time */ 
		  rproc_ptr[who_p]->r_alive_tm = m.NOTIFY_TIMESTAMP;
	  }
      }

      /* If this is not a notification message, it is a normal request. 
       * Handle the request and send a reply to the caller. 
       */
      else {	
          switch(call_nr) {
          case RS_UP: 		result = do_up(&m); 		break;
          case RS_DOWN: 	result = do_down(&m); 		break;
          case RS_REFRESH: 	result = do_refresh(&m); 	break;
          case RS_RESCUE: 	result = do_rescue(&m); 	break;
          case RS_SHUTDOWN: 	result = do_shutdown(&m); 	break;
          case GETSYSINFO: 	result = do_getsysinfo(&m); 	break;
          default: 
              printf("Warning, RS got unexpected request %d from %d\n",
                  m.m_type, m.m_source);
              result = EINVAL;
          }

          /* Finally send reply message, unless disabled. */
          if (result != EDONTREPLY) {
              reply(who_e, result);
          }
      }
  }
}
/*===========================================================================*
 *				main					     *
 *===========================================================================*/
int main()
{
/* Main routine of the process manager. */
  int result;

  /* SEF local startup. */
  sef_local_startup();
  
  
// Initialization of the semarray (of pointers) to NULL
  
  register struct mproc *rmp;
  
// rmp is the pointer to the struct of the process table

    	 for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++)
    	 
    	 {
    				 for(int i=0; i<12; i++) // for all 12 semaphores
    				  {
    					  rmp->semarray[i]=NULL;
    				  }
    				  
    	  }

  // end of Initialization
  

/* This is PM's main loop-  get work and do it, forever and forever. */
  
while (TRUE) {
	  int ipc_status;

	  /* Wait for the next message and extract useful information from it. */
	  if (sef_receive_status(ANY, &m_in, &ipc_status) != OK)
		  panic("PM sef_receive_status error");
	  who_e = m_in.m_source;	/* who sent the message */
	  if(pm_isokendpt(who_e, &who_p) != OK)
		  panic("PM got message from invalid endpoint: %d", who_e);
	  call_nr = m_in.m_type;	/* system call number */

	  /* Process slot of caller. Misuse PM's own process slot if the kernel is
	   * calling. This can happen in case of synchronous alarms (CLOCK) or or
	   * event like pending kernel signals (SYSTEM).
	   */
	  mp = &mproc[who_p < 0 ? PM_PROC_NR : who_p];
	  if(who_p >= 0 && mp->mp_endpoint != who_e) {
		  panic("PM endpoint number out of sync with source: %d",
				  			mp->mp_endpoint);
	  }

	/* Drop delayed calls from exiting processes. */
	if (mp->mp_flags & EXITING)
		continue;

	/* Check for system notifications first. Special cases. */
	if (is_ipc_notify(ipc_status)) {
		if (who_p == CLOCK) {
			expire_timers(m_in.NOTIFY_TIMESTAMP);
		}

		/* done, send reply and continue */
		sendreply();
		continue;
	}

	switch(call_nr)
	{
	case PM_SETUID_REPLY:
	case PM_SETGID_REPLY:
	case PM_SETSID_REPLY:
	case PM_EXEC_REPLY:
	case PM_EXIT_REPLY:
	case PM_CORE_REPLY:
	case PM_FORK_REPLY:
	case PM_SRV_FORK_REPLY:
	case PM_UNPAUSE_REPLY:
	case PM_REBOOT_REPLY:
	case PM_SETGROUPS_REPLY:
		if (who_e == VFS_PROC_NR)
		{
			handle_vfs_reply();
			result= SUSPEND;		/* don't reply */
		}
		else
			result= ENOSYS;
		break;
	case COMMON_GETSYSINFO:
		result = do_getsysinfo();
		break;
	default:
		/* Else, if the system call number is valid, perform the
		 * call.
		 */
		if ((unsigned) call_nr >= NCALLS) {
			result = ENOSYS;
		} else {
#if ENABLE_SYSCALL_STATS
			calls_stats[call_nr]++;
#endif

			result = (*call_vec[call_nr])();

		}
		break;
	}

	/* Send reply. */
	if (result != SUSPEND) setreply(who_p, result);
	sendreply();
  }
  return(OK);
}