From: Jorrit Herder <jnherder@minix3.org>
Date: Wed, 20 Jul 2005 15:28:05 +0000 (+0000)
Subject: Kernel sends SIGKSTOP just before shutdown. Drivers do clean up and exit.
X-Git-Tag: v3.1.0~583
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doc/zpipe.c?a=commitdiff_plain;h=d2d975246dbb26d5bb48ae32a8dc1b85a54f9429;p=minix.git

Kernel sends SIGKSTOP just before shutdown. Drivers do clean up and exit.
---

diff --git a/drivers/dpeth/dp.c b/drivers/dpeth/dp.c
index 0f443be27..b84a1386f 100644
--- a/drivers/dpeth/dp.c
+++ b/drivers/dpeth/dp.c
@@ -49,6 +49,9 @@
 **  +------------+---------+---------+---------------+
 **
 **  $Log$
+**  Revision 1.3  2005/07/20 15:28:04  jnherder
+**  Kernel sends SIGKSTOP just before shutdown. Drivers do clean up and exit.
+**
 **  Revision 1.2  2005/07/14 15:15:17  jnherder
 **  Renamed some system library functionality.
 **
@@ -604,16 +607,19 @@ PUBLIC int main(void)
 	    case DL_STOP:	/* Stop device */
 		do_stop(&m);
 		break;
-	    case HARD_STOP:	/* Shut down */
-		for (rc = 0; rc < DE_PORT_NR; rc += 1) {
+	    case SYS_EVENT: {
+	    	sigset_t sigset = m.NOTIFY_ARG;
+	    	if (sigismember(&sigset, SIGKSTOP)) {	/* Shut down */
+		    for (rc = 0; rc < DE_PORT_NR; rc += 1) {
 			if (de_table[rc].de_mode == DEM_ENABLED) {
 				m.m_type = DL_STOP;
 				m.DL_PORT = rc;
 				do_stop(&m);
 			}
+		    }
 		}
-		sys_exit(0);
 		break;
+	    }
 	    case HARD_INT:	/* Interrupt from device */
 		for (dep = de_table; dep < &de_table[DE_PORT_NR]; dep += 1) {
 			/* If device is enabled and interrupt pending */
diff --git a/drivers/fxp/fxp.c b/drivers/fxp/fxp.c
index 5855354f7..63463488a 100644
--- a/drivers/fxp/fxp.c
+++ b/drivers/fxp/fxp.c
@@ -315,7 +315,11 @@ int main(void)
 				fxp_check_ints(fp);
 			}
 			break;
-		case HARD_STOP:	fxp_stop();			break;
+		case SYS_EVENT:	{
+			sigset_t sigset = m.NOTIFY_ARG;
+			if (sigismember(&sigset, SIGKSTOP)) fxp_stop();
+			break;
+		}
 		case SYN_ALARM:	fxp_expire_timers();		break;
 		default:
 			panic("FXP"," illegal message", m.m_type);
diff --git a/drivers/rtl8139/rtl8139.c b/drivers/rtl8139/rtl8139.c
index 9e86b7104..56fda570e 100755
--- a/drivers/rtl8139/rtl8139.c
+++ b/drivers/rtl8139/rtl8139.c
@@ -327,9 +327,7 @@ void main(void)
 			 * the driver in some cases.
 			 * MINIX timeouts result in a SYN_ALARM message to the
 			 * driver and thus are handled where they should be
-			 * handled. Interrupt()s are faked by setting m_type to
-			 * HARD_INT in rl_watchdog_f when needed, so that this 
-			 * case falls through.
+			 * handled. Locally, watchdog functions are used again. 
 			 */
 			rl_watchdog_f(NULL);     
 			break;		 
@@ -339,7 +337,11 @@ void main(void)
 				check_int_events();
 			break ;
 		case FKEY_PRESSED: rtl8139_dump(&m);		break;
-		case HARD_STOP: rtl8139_stop();			break;
+		case SYS_EVENT: {
+			sigset_t sigset = m.NOTIFY_ARG;
+			if (sigismember(&sigset, SIGKSTOP)) rtl8139_stop();		
+			break;
+		}
 		default:
 			panic("rtl8139","illegal message", m.m_type);
 		}
@@ -1904,7 +1906,7 @@ int may_block;
 	reply.DL_STAT = status | ((u32_t) err << 16);
 	reply.DL_COUNT = rep->re_read_s;
 	if (OK != (r = getuptime(&now)))
-		panic("dp8390","getuptime() failed:", r);
+		panic("rtl8139","getuptime() failed:", r);
 	reply.DL_CLCK = now;
 
 	r= send(rep->re_client, &reply);
@@ -1915,8 +1917,10 @@ int may_block;
 		return;
 	}
 
-	if (r < 0)
-		panic("dp8390","send failed:", r);
+	if (r < 0) {
+		printf("RTL8139 tried sending to %d, type %d\n", rep->re_client, reply.m_type);
+		panic("rtl8139","send failed:", r);
+	}
 	
 	rep->re_read_s = 0;
 	rep->re_flags &= ~(REF_PACK_SENT | REF_PACK_RECV);
@@ -2345,7 +2349,7 @@ timer_t *tp;
 	int i;
 	re_t *rep;
 	/* Use a synchronous alarm instead of a watchdog timer. */
-	sys_syncalrm(SELF, HZ, 0);
+	sys_setalarm(SELF, HZ, 0);
 
 	for (i= 0, rep = &re_table[0]; i<RE_PORT_NR; i++, rep++)
 	{
diff --git a/drivers/tty/tty.c b/drivers/tty/tty.c
index cd67d2de3..42544c6b5 100644
--- a/drivers/tty/tty.c
+++ b/drivers/tty/tty.c
@@ -19,7 +19,7 @@
  * The valid messages and their parameters are:
  *
  *   HARD_INT:       output has been completed or input has arrived
- *   HARD_STOP:      MINIX wants to shutdown; run code to cleanly stop
+ *   SYS_EVENT:      e.g., MINIX wants to shutdown; run code to cleanly stop
  *   DEV_READ:       a process wants to read from a terminal
  *   DEV_WRITE:      a process wants to write on a terminal
  *   DEV_IOCTL:      a process wants to change a terminal's parameters
@@ -33,7 +33,7 @@
  * ---------------------------------------------------------------------------
  * | HARD_INT    |         |         |         |         |         |         |
  * |-------------+---------+---------+---------+---------+---------+---------|
- * | HARD_STOP   |         |         |         |         |         |         |
+ * | SYS_EVENT   | sig set |         |         |         |         |         |
  * |-------------+---------+---------+---------+---------+---------+---------|
  * | DEV_READ    |minor dev| proc nr |  count  |         O_NONBLOCK| buf ptr |
  * |-------------+---------+---------+---------+---------+---------+---------|
@@ -206,31 +206,18 @@ PUBLIC void main(void)
 	}
 	case SYS_EVENT: {		/* new kernel message is available */
 		sigset_t sigset = (sigset_t) tty_mess.NOTIFY_ARG;
-		if (sigismember(&sigset, SIGKMESS)) {
-			do_new_kmess(&tty_mess);
-		} else if (sigismember(&sigset, SIGTERM)) {
-			cons_stop();	/* first switch to primary console */
-		} else if (sigismember(&sigset, SIGKSTOP)) {
+		if (sigismember(&sigset, SIGKSTOP)) {
 			cons_stop();		/* switch to primary console */
-			do_panic_dumps(&tty_mess);	
-		}
-		continue;
-	}
-	case HARD_STOP: {		/* MINIX is going down */
-		static int stop = 0;	/* expect two HARD_STOP messages */
-		if (! stop++) {
-			cons_stop();	/* first switch to primary console */
-		} else {
-			if(irq_hook_id != -1) {
-				int r;
-				r = sys_irqdisable(&irq_hook_id);
-				r = sys_irqrmpolicy(KEYBOARD_IRQ, &irq_hook_id);
+#if DEAD_CODE
+			if (irq_hook_id != -1) {
+				sys_irqdisable(&irq_hook_id);
+				sys_irqrmpolicy(KEYBOARD_IRQ, &irq_hook_id);
 			}
-			printf("[DONE]\n");
-			printf("MINIX will now be shutdown.\n");
-			sys_exit(0);	/* then exit TTY */
-		}
-	 	continue;		
+#endif
+		} 
+		if (sigismember(&sigset, SIGTERM)) cons_stop();	
+		if (sigismember(&sigset, SIGKMESS)) do_new_kmess(&tty_mess);
+		continue;
 	}
 	case PANIC_DUMPS:		/* allow panic dumps */
 		cons_stop();		/* switch to primary console */