With this patch setters invoke procedures only if values have changed.
Also rstp_set_bridge_address__() keeps the existing priority in the
bridge_identifier.
Signed-off-by: Daniele Venturino <[email protected]>
---
lib/rstp.c | 80 ++++++++++++++++++++++++++++++++++++--------------------------
1 file changed, 46 insertions(+), 34 deletions(-)
diff --git a/lib/rstp.c b/lib/rstp.c
index 5256740..144f2ba 100644
--- a/lib/rstp.c
+++ b/lib/rstp.c
@@ -322,10 +322,12 @@ rstp_set_bridge_address__(struct rstp *rstp,
rstp_identifier bridge_address)
{
VLOG_DBG("%s: set bridge address to: "RSTP_ID_FMT"", rstp->name,
RSTP_ID_ARGS(bridge_address));
-
- rstp->address = bridge_address;
- rstp->bridge_identifier = bridge_address;
- set_bridge_priority__(rstp);
+ if (rstp->address != bridge_address) {
+ rstp->address = bridge_address;
+ rstp->bridge_identifier &= 0xffff000000000000ULL;
+ rstp->bridge_identifier |= bridge_address;
+ set_bridge_priority__(rstp);
+ }
}
/* Sets the bridge address. */
@@ -370,7 +372,8 @@ rstp_set_bridge_priority__(struct rstp *rstp, int
new_priority)
{
new_priority = ROUND_DOWN(new_priority, RSTP_PRIORITY_STEP);
- if (new_priority >= RSTP_MIN_PRIORITY
+ if (rstp->priority != new_priority
+ && new_priority >= RSTP_MIN_PRIORITY
&& new_priority <= RSTP_MAX_PRIORITY) {
VLOG_DBG("%s: set bridge priority to %d", rstp->name, new_priority);
@@ -584,7 +587,8 @@ rstp_set_bridge_transmit_hold_count__(struct rstp *rstp,
int new_transmit_hold_count)
OVS_REQUIRES(rstp_mutex)
{
- if (new_transmit_hold_count >= RSTP_MIN_TRANSMIT_HOLD_COUNT
+ if (rstp->transmit_hold_count != new_transmit_hold_count
+ && new_transmit_hold_count >= RSTP_MIN_TRANSMIT_HOLD_COUNT
&& new_transmit_hold_count <= RSTP_MAX_TRANSMIT_HOLD_COUNT) {
struct rstp_port *p;
@@ -664,7 +668,8 @@ static void
rstp_port_set_priority__(struct rstp_port *port, int priority)
OVS_REQUIRES(rstp_mutex)
{
- if (priority >= RSTP_MIN_PORT_PRIORITY
+ if (port->priority != priority
+ && priority >= RSTP_MIN_PORT_PRIORITY
&& priority <= RSTP_MAX_PORT_PRIORITY) {
VLOG_DBG("%s, port %u: set RSTP port priority to %d", port->rstp->name,
port->port_number, priority);
@@ -713,19 +718,21 @@ rstp_port_set_port_number__(struct rstp_port *port,
uint16_t port_number)
{
/* If new_port_number is available, use it, otherwise use the first free
* available port number. */
- port->port_number =
- is_port_number_available__(port->rstp, port_number, port)
- ? port_number
- : rstp_first_free_number__(port->rstp, port);
+ if (port->port_number != port_number || port_number == 0) {
+ port->port_number =
+ is_port_number_available__(port->rstp, port_number, port)
+ ? port_number
+ : rstp_first_free_number__(port->rstp, port);
- set_port_id__(port);
- /* [17.13] is not clear. I suppose that a port number change
- * should trigger reselection like a port priority change. */
- port->selected = false;
- port->reselect = true;
+ set_port_id__(port);
+ /* [17.13] is not clear. I suppose that a port number change
+ * should trigger reselection like a port priority change. */
+ port->selected = false;
+ port->reselect = true;
- VLOG_DBG("%s: set new RSTP port number %d", port->rstp->name,
- port->port_number);
+ VLOG_DBG("%s: set new RSTP port number %d", port->rstp->name,
+ port->port_number);
+ }
}
/* Converts the link speed to a port path cost [Table 17-3]. */
@@ -752,7 +759,8 @@ static void
rstp_port_set_path_cost__(struct rstp_port *port, uint32_t path_cost)
OVS_REQUIRES(rstp_mutex)
{
- if (path_cost >= RSTP_MIN_PORT_PATH_COST
+ if (port->port_path_cost != path_cost
+ && path_cost >= RSTP_MIN_PORT_PATH_COST
&& path_cost <= RSTP_MAX_PORT_PATH_COST) {
VLOG_DBG("%s, port %u, set RSTP port path cost to %d",
port->rstp->name, port->port_number, path_cost);
@@ -986,8 +994,9 @@ rstp_port_set_administrative_bridge_port__(struct rstp_port
*p,
{
VLOG_DBG("%s, port %u: set RSTP port admin-port-state to %d",
p->rstp->name, p->port_number, admin_port_state);
- if (admin_port_state == RSTP_ADMIN_BRIDGE_PORT_STATE_DISABLED
- || admin_port_state == RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED) {
+ if (p->is_administrative_bridge_port != admin_port_state
+ && (admin_port_state == RSTP_ADMIN_BRIDGE_PORT_STATE_DISABLED
+ || admin_port_state == RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED)) {
p->is_administrative_bridge_port = admin_port_state;
update_port_enabled__(p);
@@ -1005,8 +1014,9 @@ rstp_port_set_oper_point_to_point_mac__(struct rstp_port
*p,
uint8_t new_oper_p2p_mac)
OVS_REQUIRES(rstp_mutex)
{
- if (new_oper_p2p_mac == RSTP_OPER_P2P_MAC_STATE_DISABLED
- || new_oper_p2p_mac == RSTP_OPER_P2P_MAC_STATE_ENABLED) {
+ if (p->oper_point_to_point_mac != new_oper_p2p_mac
+ && (new_oper_p2p_mac == RSTP_OPER_P2P_MAC_STATE_DISABLED
+ || new_oper_p2p_mac == RSTP_OPER_P2P_MAC_STATE_ENABLED)) {
p->oper_point_to_point_mac = new_oper_p2p_mac;
update_port_enabled__(p);
@@ -1197,17 +1207,19 @@ static void
rstp_port_set_admin_point_to_point_mac__(struct rstp_port *port,
{
VLOG_DBG("%s, port %u: set RSTP port admin-point-to-point-mac to %d",
port->rstp->name, port->port_number, admin_p2p_mac_state);
- if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_FORCE_TRUE) {
- port->admin_point_to_point_mac = admin_p2p_mac_state;
- rstp_port_set_oper_point_to_point_mac__(port,
- RSTP_OPER_P2P_MAC_STATE_ENABLED);
- } else if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_FORCE_FALSE) {
- port->admin_point_to_point_mac = admin_p2p_mac_state;
- rstp_port_set_oper_point_to_point_mac__(port,
- RSTP_OPER_P2P_MAC_STATE_DISABLED);
- } else if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_AUTO) {
- port->admin_point_to_point_mac = admin_p2p_mac_state;
- /* FIXME fix auto behaviour */
+ if (port->admin_point_to_point_mac != admin_p2p_mac_state) {
+ if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_FORCE_TRUE) {
+ port->admin_point_to_point_mac = admin_p2p_mac_state;
+ rstp_port_set_oper_point_to_point_mac__(port,
+ RSTP_OPER_P2P_MAC_STATE_ENABLED);
+ } else if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_FORCE_FALSE) {
+ port->admin_point_to_point_mac = admin_p2p_mac_state;
+ rstp_port_set_oper_point_to_point_mac__(port,
+ RSTP_OPER_P2P_MAC_STATE_DISABLED);
+ } else if (admin_p2p_mac_state == RSTP_ADMIN_P2P_MAC_AUTO) {
+ port->admin_point_to_point_mac = admin_p2p_mac_state;
+ /* FIXME fix auto behaviour */
+ }
}
}
--
1.8.1.2
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