* or connected to a particular channel
*/
static_inline int
-rxi_AbortIfServerBusy(osi_socket socket, afs_uint32 host,
- u_short port, struct rx_packet *np)
+rxi_AbortIfServerBusy(osi_socket socket, struct rx_connection *conn,
+ struct rx_packet *np)
{
if ((rx_BusyThreshold > 0) &&
(rx_atomic_read(&rx_nWaiting) > rx_BusyThreshold)) {
- rxi_SendRawAbort(socket, host, port, rx_BusyError, np, 0);
+ rxi_SendRawAbort(socket, conn->peer->host, conn->peer->port,
+ rx_BusyError, np, 0);
if (rx_stats_active)
rx_atomic_inc(&rx_stats.nBusies);
return 1;
return 0;
}
+static_inline struct rx_call *
+rxi_ReceiveClientCall(struct rx_packet *np, struct rx_connection *conn)
+{
+ int channel;
+ struct rx_call *call;
+
+ channel = np->header.cid & RX_CHANNELMASK;
+ MUTEX_ENTER(&conn->conn_call_lock);
+ call = conn->call[channel];
+ if (!call || conn->callNumber[channel] != np->header.callNumber) {
+ MUTEX_EXIT(&conn->conn_call_lock);
+ if (rx_stats_active)
+ rx_atomic_inc(&rx_stats.spuriousPacketsRead);
+ return NULL;
+ }
+
+ MUTEX_ENTER(&call->lock);
+ MUTEX_EXIT(&conn->conn_call_lock);
+
+ if ((call->state == RX_STATE_DALLY)
+ && np->header.type == RX_PACKET_TYPE_ACK) {
+ if (rx_stats_active)
+ rx_atomic_inc(&rx_stats.ignorePacketDally);
+ MUTEX_EXIT(&call->lock);
+ return NULL;
+ }
+
+ return call;
+}
+
+static_inline struct rx_call *
+rxi_ReceiveServerCall(osi_socket socket, struct rx_packet *np,
+ struct rx_connection *conn)
+{
+ int channel;
+ struct rx_call *call;
+
+ channel = np->header.cid & RX_CHANNELMASK;
+ MUTEX_ENTER(&conn->conn_call_lock);
+ call = conn->call[channel];
+
+ if (!call) {
+ if (rxi_AbortIfServerBusy(socket, conn, np)) {
+ MUTEX_EXIT(&conn->conn_call_lock);
+ return NULL;
+ }
+
+ call = rxi_NewCall(conn, channel); /* returns locked call */
+ *call->callNumber = np->header.callNumber;
+ MUTEX_EXIT(&conn->conn_call_lock);
+
+ call->state = RX_STATE_PRECALL;
+ clock_GetTime(&call->queueTime);
+ call->app.bytesSent = 0;
+ call->app.bytesRcvd = 0;
+ rxi_KeepAliveOn(call);
+
+ return call;
+ }
+
+ if (np->header.callNumber == conn->callNumber[channel]) {
+ MUTEX_ENTER(&call->lock);
+ MUTEX_EXIT(&conn->conn_call_lock);
+ return call;
+ }
+
+ if (np->header.callNumber < conn->callNumber[channel]) {
+ MUTEX_EXIT(&conn->conn_call_lock);
+ if (rx_stats_active)
+ rx_atomic_inc(&rx_stats.spuriousPacketsRead);
+ return NULL;
+ }
+
+ MUTEX_ENTER(&call->lock);
+ MUTEX_EXIT(&conn->conn_call_lock);
+
+ /* Wait until the transmit queue is idle before deciding
+ * whether to reset the current call. Chances are that the
+ * call will be in ether DALLY or HOLD state once the TQ_BUSY
+ * flag is cleared.
+ */
+#ifdef RX_ENABLE_LOCKS
+ if (call->state == RX_STATE_ACTIVE) {
+ rxi_WaitforTQBusy(call);
+ /* If we entered error state while waiting,
+ * must call rxi_CallError to permit rxi_ResetCall
+ * to processed when the tqWaiter count hits zero.
+ */
+ if (call->error) {
+ rxi_CallError(call, call->error);
+ MUTEX_EXIT(&call->lock);
+ return NULL;
+ }
+ }
+#endif /* RX_ENABLE_LOCKS */
+ /* If the new call cannot be taken right now send a busy and set
+ * the error condition in this call, so that it terminates as
+ * quickly as possible */
+ if (call->state == RX_STATE_ACTIVE) {
+ rxi_CallError(call, RX_CALL_DEAD);
+ rxi_SendSpecial(call, conn, NULL, RX_PACKET_TYPE_BUSY,
+ NULL, 0, 1);
+ MUTEX_EXIT(&call->lock);
+ return NULL;
+ }
+
+ if (rxi_AbortIfServerBusy(socket, conn, np)) {
+ MUTEX_EXIT(&call->lock);
+ return NULL;
+ }
+
+ rxi_ResetCall(call, 0);
+ /* The conn_call_lock is not held but no one else should be
+ * using this call channel while we are processing this incoming
+ * packet. This assignment should be safe.
+ */
+ *call->callNumber = np->header.callNumber;
+ call->state = RX_STATE_PRECALL;
+ clock_GetTime(&call->queueTime);
+ call->app.bytesSent = 0;
+ call->app.bytesRcvd = 0;
+ rxi_KeepAliveOn(call);
+
+ return call;
+}
+
+
/* There are two packet tracing routines available for testing and monitoring
* Rx. One is called just after every packet is received and the other is
* called just before every packet is sent. Received packets, have had their
{
struct rx_call *call;
struct rx_connection *conn;
- int channel;
- afs_uint32 currentCallNumber;
int type;
#ifdef RXDEBUG
char *packetType;
}
}
- channel = np->header.cid & RX_CHANNELMASK;
- MUTEX_ENTER(&conn->conn_call_lock);
- call = conn->call[channel];
-
- if (call) {
- MUTEX_ENTER(&call->lock);
- currentCallNumber = conn->callNumber[channel];
- MUTEX_EXIT(&conn->conn_call_lock);
- } else if (type == RX_SERVER_CONNECTION) { /* No call allocated */
-
- if (rxi_AbortIfServerBusy(socket, host, port, np)) {
+ if (type == RX_SERVER_CONNECTION) {
+ call = rxi_ReceiveServerCall(socket, np, conn);
+ if (call == NULL) {
putConnection(conn);
return np;
- }
-
- call = rxi_NewCall(conn, channel); /* returns locked call */
- *call->callNumber = currentCallNumber = np->header.callNumber;
- MUTEX_EXIT(&conn->conn_call_lock);
- call->state = RX_STATE_PRECALL;
- clock_GetTime(&call->queueTime);
- call->app.bytesSent = 0;
- call->app.bytesRcvd = 0;
- rxi_KeepAliveOn(call);
-
- } else { /* RX_CLIENT_CONNECTION and No call allocated */
- /* This packet can't be for this call. If the new call address is
- * 0 then no call is running on this channel. If there is a call
- * then, since this is a client connection we're getting data for
- * it must be for the previous call.
- */
- MUTEX_EXIT(&conn->conn_call_lock);
- if (rx_stats_active)
- rx_atomic_inc(&rx_stats.spuriousPacketsRead);
- putConnection(conn);
- return np;
- }
-
- /* There is a non-NULL locked call at this point */
- if (type == RX_SERVER_CONNECTION) { /* We're the server */
- if (np->header.callNumber < currentCallNumber) {
- MUTEX_EXIT(&call->lock);
- if (rx_stats_active)
- rx_atomic_inc(&rx_stats.spuriousPacketsRead);
- putConnection(conn);
- return np;
- } else if (np->header.callNumber != currentCallNumber) {
- /* Wait until the transmit queue is idle before deciding
- * whether to reset the current call. Chances are that the
- * call will be in ether DALLY or HOLD state once the TQ_BUSY
- * flag is cleared.
- */
-#ifdef RX_ENABLE_LOCKS
- if (call->state == RX_STATE_ACTIVE) {
- rxi_WaitforTQBusy(call);
- /*
- * If we entered error state while waiting,
- * must call rxi_CallError to permit rxi_ResetCall
- * to processed when the tqWaiter count hits zero.
- */
- if (call->error) {
- rxi_CallError(call, call->error);
- MUTEX_EXIT(&call->lock);
- putConnection(conn);
- return np;
- }
- }
-#endif /* RX_ENABLE_LOCKS */
- /* If the new call cannot be taken right now send a busy and set
- * the error condition in this call, so that it terminates as
- * quickly as possible */
- if (call->state == RX_STATE_ACTIVE) {
- struct rx_packet *tp;
-
- rxi_CallError(call, RX_CALL_DEAD);
- tp = rxi_SendSpecial(call, conn, np, RX_PACKET_TYPE_BUSY,
- NULL, 0, 1);
- MUTEX_EXIT(&call->lock);
- putConnection(conn);
- return tp;
- }
-
- if (rxi_AbortIfServerBusy(socket, host, port, np)) {
- MUTEX_EXIT(&call->lock);
- putConnection(conn);
- return np;
- }
-
- rxi_ResetCall(call, 0);
- /*
- * The conn_call_lock is not held but no one else should be
- * using this call channel while we are processing this incoming
- * packet. This assignment should be safe.
- */
- *call->callNumber = np->header.callNumber;
- call->state = RX_STATE_PRECALL;
- clock_GetTime(&call->queueTime);
- call->app.bytesSent = 0;
- call->app.bytesRcvd = 0;
- rxi_KeepAliveOn(call);
- } else {
- /* Continuing call; do nothing here. */
- }
- } else { /* we're the client */
- /* Ignore all incoming acknowledgements for calls in DALLY state */
- if ((call->state == RX_STATE_DALLY)
- && (np->header.type == RX_PACKET_TYPE_ACK)) {
- if (rx_stats_active)
- rx_atomic_inc(&rx_stats.ignorePacketDally);
- MUTEX_EXIT(&call->lock);
+ }
+ } else {
+ call = rxi_ReceiveClientCall(np, conn);
+ if (call == NULL) {
putConnection(conn);
return np;
}
- /* Ignore anything that's not relevant to the current call. If there
- * isn't a current call, then no packet is relevant. */
- if (np->header.callNumber != currentCallNumber) {
- if (rx_stats_active)
- rx_atomic_inc(&rx_stats.spuriousPacketsRead);
- MUTEX_EXIT(&call->lock);
- putConnection(conn);
- return np;
- }
/* If the service security object index stamped in the packet does not
* match the connection's security index, ignore the packet */
if (np->header.securityIndex != conn->securityIndex) {
git://git.openafs.org / openafs.git / blobdiff