From cfef9796e87e2038100b09342a68b525d06834f3 Mon Sep 17 00:00:00 2001
From: Nickolai Zeldovich <kolya@mit.edu>
Date: Mon, 13 Jan 2003 20:25:54 +0000
Subject: [PATCH] Make the Rx deadtime a tunable variable, either with a kernel
 debugger of some sort, or sysctl on Linux.  To follow later: Rx idle dead
 time, but this requires more in-depth changes to conn handling and such.

---
 src/afs/LINUX/osi_sysctl.c | 3 +++
 src/afs/afs.h              | 5 ++++-
 src/afs/afs_call.c         | 5 ++++-
 src/afs/afs_conn.c         | 7 +++----
 src/afs/afs_server.c       | 4 ++--
 5 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/src/afs/LINUX/osi_sysctl.c b/src/afs/LINUX/osi_sysctl.c
index d159c8966..5bb9a5a5d 100644
--- a/src/afs/LINUX/osi_sysctl.c
+++ b/src/afs/LINUX/osi_sysctl.c
@@ -37,6 +37,9 @@ static ctl_table afs_sysctl_table[] = {
         {4, "GCPAGs",
          &afs_gcpags, sizeof(afs_int32), 0644, NULL,
          &proc_dointvec},
+	{5, "rx_deadtime",
+	 &afs_rx_deadtime, sizeof(afs_int32), 0644, NULL,
+	 &proc_dointvec},
 	{0}
 };
 
diff --git a/src/afs/afs.h b/src/afs/afs.h
index b2d029bad..7ee962e22 100644
--- a/src/afs/afs.h
+++ b/src/afs/afs.h
@@ -84,7 +84,10 @@ extern int afs_shuttingdown;
 #define	VCACHE_FREE	5
 #define	AFS_NRXPACKETS	80
 #define	AFS_RXDEADTIME	50
-#define AFS_HARDDEADTIME        120
+#define AFS_HARDDEADTIME	120
+
+extern afs_int32 afs_rx_deadtime;
+extern afs_int32 afs_rx_harddead;
 
 struct sysname_info {
   char *name;
diff --git a/src/afs/afs_call.c b/src/afs/afs_call.c
index 4117ef318..321444431 100644
--- a/src/afs/afs_call.c
+++ b/src/afs/afs_call.c
@@ -89,6 +89,9 @@ extern struct interfaceAddr afs_cb_interface;
 static int afs_RX_Running = 0;
 static int afs_InitSetup_done = 0;
 
+afs_int32 afs_rx_deadtime = AFS_RXDEADTIME;
+afs_int32 afs_rx_harddead = AFS_HARDDEADTIME;
+
 static int
 Afscall_icl(long opcode, long p1, long p2, long p3, long p4, long *retval);
 
@@ -125,7 +128,7 @@ static int afs_InitSetup(int preallocs)
 	printf("AFS: RX failed to initialize.\n");
 	return code;
     }
-    rx_SetRxDeadTime(AFS_RXDEADTIME);
+    rx_SetRxDeadTime(afs_rx_deadtime);
     /* resource init creates the services */
     afs_ResourceInit(preallocs);
 
diff --git a/src/afs/afs_conn.c b/src/afs/afs_conn.c
index e06751b19..7691b2cd9 100644
--- a/src/afs/afs_conn.c
+++ b/src/afs/afs_conn.c
@@ -226,10 +226,9 @@ struct conn *afs_ConnBySA(struct srvAddr *sap, unsigned short aport,
 	AFS_GUNLOCK();
 	tc->id = rx_NewConnection(sap->sa_ip, aport, service, csec, isec);
 	AFS_GLOCK();
-        if (service == 52) { 
-           rx_SetConnHardDeadTime(tc->id, AFS_HARDDEADTIME);
-       }
-
+	if (service == 52) { 
+	    rx_SetConnHardDeadTime(tc->id, afs_rx_harddead);
+	}
 
 	tc->forceConnectFS = 0;	/* apparently we're appropriately connected now */
 	if (csec)
diff --git a/src/afs/afs_server.c b/src/afs/afs_server.c
index a71e7df7f..550a10dc3 100644
--- a/src/afs/afs_server.c
+++ b/src/afs/afs_server.c
@@ -303,7 +303,7 @@ static void CheckVLServer(register struct srvAddr *sa, struct vrequest *areq)
     RX_AFS_GUNLOCK();
     code = VL_ProbeServer(tc->id);
     RX_AFS_GLOCK();
-    rx_SetConnDeadTime(tc->id, AFS_RXDEADTIME);
+    rx_SetConnDeadTime(tc->id, afs_rx_deadtime);
     afs_PutConn(tc, SHARED_LOCK);
     /*
      * If probe worked, or probe call not yet defined (for compatibility
@@ -616,7 +616,7 @@ void afs_CheckServers(int adown, struct cell *acellp)
 		afs_setTimeHost = tc->srvr->server;
 	    }
 	    if (setTimer)
-		rx_SetConnDeadTime(tc->id, AFS_RXDEADTIME);
+		rx_SetConnDeadTime(tc->id, afs_rx_deadtime);
 	    if (code >= 0 && (sa->sa_flags & SRVADDR_ISDOWN) && (tc->srvr == sa)) {
 		/* server back up */
 		print_internet_address("afs: file server ", sa, " is back up", 2);
-- 
2.39.5