/*
- * Copyright (c) 2011-2014 M3S, Srl - Italy
+ * Copyright (c) 2011-2015 M3S, Srl - Italy
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* Authors:
* Martino Fornasa <mf@fornasa.it>
* Daniele Venturino <daniele.venturino@m3s.it>
+ * Carlo Andreotti <c.andreotti@m3s.it>
*
* References to IEEE 802.1D-2004 standard are enclosed in square brackets.
* E.g. [17.3], [Table 17-1], etc.
#include "connectivity.h"
#include "ofpbuf.h"
#include "ofproto/ofproto.h"
+#include "dp-packet.h"
#include "packets.h"
#include "seq.h"
#include "unixctl.h"
#include "util.h"
-#include "vlog.h"
+#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(rstp);
struct ovs_mutex rstp_mutex = OVS_MUTEX_INITIALIZER;
-static struct list all_rstps__ = LIST_INITIALIZER(&all_rstps__);
-static struct list *const all_rstps OVS_GUARDED_BY(rstp_mutex) = &all_rstps__;
+static struct ovs_list all_rstps__ = OVS_LIST_INITIALIZER(&all_rstps__);
+static struct ovs_list *const all_rstps OVS_GUARDED_BY(rstp_mutex) = &all_rstps__;
/* Internal use only. */
static void rstp_set_bridge_address__(struct rstp *, rstp_identifier)
static void rstp_port_set_path_cost__(struct rstp_port *, uint32_t path_cost)
OVS_REQUIRES(rstp_mutex);
static void rstp_port_set_administrative_bridge_port__(struct rstp_port *,
- uint8_t admin_port_state)
+ uint8_t admin_port_state,
+ bool initializing)
OVS_REQUIRES(rstp_mutex);
static void rstp_port_set_admin_edge__(struct rstp_port *, bool admin_edge)
OVS_REQUIRES(rstp_mutex);
list_remove(&rstp->node);
ovs_mutex_unlock(&rstp_mutex);
+ hmap_destroy(&rstp->ports);
free(rstp->name);
free(rstp);
}
/* Creates and returns a new RSTP instance that initially has no ports. */
struct rstp *
rstp_create(const char *name, rstp_identifier bridge_address,
- void (*send_bpdu)(struct ofpbuf *bpdu, void *port_aux,
+ void (*send_bpdu)(struct dp_packet *bpdu, void *port_aux,
void *rstp_aux),
void *aux)
OVS_EXCLUDED(rstp_mutex)
rstp->aux = aux;
rstp->changes = false;
rstp->begin = true;
+ rstp->old_root_aux = NULL;
+ rstp->new_root_aux = NULL;
ovs_refcount_init(&rstp->ref_cnt);
{
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. */
{
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);
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;
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);
rstp_port_set_port_number__(struct rstp_port *port, uint16_t port_number)
OVS_REQUIRES(rstp_mutex)
{
+ int old_port_number = port->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);
-
- 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;
+ 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);
+
+ if (port->port_number != old_port_number) {
+ 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;
+
+ /* Adjust the ports hmap. */
+ if (!hmap_node_is_null(&port->node)) {
+ hmap_remove(&port->rstp->ports, &port->node);
+ }
+ hmap_insert(&port->rstp->ports, &port->node,
+ hash_int(port->port_number, 0));
- 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]. */
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);
return cost;
}
-/* Returns true if something has happened to 'rstp' which necessitates
- * flushing the client's MAC learning table.
- */
-bool
-rstp_check_and_reset_fdb_flush(struct rstp *rstp)
+/* Finds a port which needs to flush its own MAC learning table. A NULL
+ * pointer is returned if no port needs to flush its MAC learning table.
+ * '*port' needs to be NULL in the first call to start the iteration. If
+ * '*port' is passed as non-NULL, it must be the value set by the last
+ * invocation of this function.
+ *
+ * This function may only be called by the thread that creates and deletes
+ * ports. Otherwise this function is not thread safe, as the returned
+ * '*port' could become stale before it is used in the next invocation. */
+void *
+rstp_check_and_reset_fdb_flush(struct rstp *rstp, struct rstp_port **port)
OVS_EXCLUDED(rstp_mutex)
{
- bool needs_flush;
- struct rstp_port *p;
-
- needs_flush = false;
+ void *aux = NULL;
ovs_mutex_lock(&rstp_mutex);
- HMAP_FOR_EACH (p, node, &rstp->ports) {
- if (p->fdb_flush) {
- needs_flush = true;
- /* fdb_flush should be reset by the filtering database
- * once the entries are removed if rstp_version is TRUE, and
- * immediately if stp_version is TRUE.*/
- p->fdb_flush = false;
+ if (*port == NULL) {
+ struct rstp_port *p;
+
+ HMAP_FOR_EACH (p, node, &rstp->ports) {
+ if (p->fdb_flush) {
+ aux = p->aux;
+ *port = p;
+ goto out;
+ }
}
+ } else { /* continue */
+ struct rstp_port *p = *port;
+
+ HMAP_FOR_EACH_CONTINUE (p, node, &rstp->ports) {
+ if (p->fdb_flush) {
+ aux = p->aux;
+ *port = p;
+ goto out;
+ }
+ }
+ }
+ /* No port needs flushing. */
+ *port = NULL;
+out:
+ /* fdb_flush should be reset by the filtering database
+ * once the entries are removed if rstp_version is TRUE, and
+ * immediately if stp_version is TRUE.*/
+ if (*port != NULL) {
+ (*port)->fdb_flush = false;
}
ovs_mutex_unlock(&rstp_mutex);
- return needs_flush;
+
+ return aux;
}
/* Finds a port whose state has changed, and returns the aux pointer set for
*portp = NULL;
out:
ovs_mutex_unlock(&rstp_mutex);
+
return aux;
}
+bool
+rstp_shift_root_learned_address(struct rstp *rstp)
+{
+ bool ret;
+
+ ovs_mutex_lock(&rstp_mutex);
+ ret = rstp->root_changed;
+ ovs_mutex_unlock(&rstp_mutex);
+
+ return ret;
+}
+
+void *
+rstp_get_old_root_aux(struct rstp *rstp)
+{
+ void *aux;
+
+ ovs_mutex_lock(&rstp_mutex);
+ aux = rstp->old_root_aux;
+ ovs_mutex_unlock(&rstp_mutex);
+
+ return aux;
+}
+
+void *
+rstp_get_new_root_aux(struct rstp *rstp)
+{
+ void *aux;
+
+ ovs_mutex_lock(&rstp_mutex);
+ aux = rstp->new_root_aux;
+ ovs_mutex_unlock(&rstp_mutex);
+
+ return aux;
+}
+
+void
+rstp_reset_root_changed(struct rstp *rstp)
+{
+ ovs_mutex_lock(&rstp_mutex);
+ rstp->root_changed = false;
+ ovs_mutex_unlock(&rstp_mutex);
+}
+
/* Returns the port in 'rstp' with number 'port_number'.
*
* XXX: May only be called while concurrent deletion of ports is excluded. */
}
void *
-rstp_get_port_aux(struct rstp *rstp, uint16_t port_number)
- OVS_EXCLUDED(rstp_mutex)
+rstp_get_port_aux__(struct rstp *rstp, uint16_t port_number)
+ OVS_REQUIRES(rstp_mutex)
{
struct rstp_port *p;
- void *aux;
-
- ovs_mutex_lock(&rstp_mutex);
p = rstp_get_port__(rstp, port_number);
- aux = p->aux;
- ovs_mutex_unlock(&rstp_mutex);
- return aux;
+ if (p) {
+ return p->aux;
+ }
+ return NULL;
}
/* Updates the port_enabled parameter. */
/* Sets the port Administrative Bridge Port parameter. */
static void
rstp_port_set_administrative_bridge_port__(struct rstp_port *p,
- uint8_t admin_port_state)
+ uint8_t admin_port_state,
+ bool initializing)
OVS_REQUIRES(rstp_mutex)
{
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);
+
+ if (!initializing) {
+ struct rstp *rstp = p->rstp;
+
+ rstp->changes = true;
+ move_rstp__(rstp);
+ }
}
}
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);
OVS_REQUIRES(rstp_mutex)
{
rstp_port_set_administrative_bridge_port__(p,
- RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED);
+ RSTP_ADMIN_BRIDGE_PORT_STATE_ENABLED,
+ true);
rstp_port_set_oper_point_to_point_mac__(p,
RSTP_OPER_P2P_MAC_STATE_ENABLED);
rstp_port_set_path_cost__(p, RSTP_DEFAULT_PORT_PATH_COST);
struct rstp_port *p = xzalloc(sizeof *p);
ovs_refcount_init(&p->ref_cnt);
+ hmap_node_nullify(&p->node);
ovs_mutex_lock(&rstp_mutex);
p->rstp = rstp;
p->port_id);
rstp_port_set_state__(p, RSTP_DISCARDING);
- hmap_insert(&rstp->ports, &p->node, hash_int(p->port_number, 0));
rstp->changes = true;
move_rstp__(rstp);
VLOG_DBG("%s: added port "RSTP_PORT_ID_FMT"", rstp->name, p->port_id);
{
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) {
- /* If adminPointToPointMAC is set to Auto, then the value of
- * operPointToPointMAC is determined in accordance with the
- * specific procedures defined for the MAC entity concerned, as
- * defined in 6.5. If these procedures determine that the MAC
- * entity is connected to a point-to-point LAN, then
- * operPointToPointMAC is set TRUE; otherwise it is set FALSE.
- * In the absence of a specific definition of how to determine
- * whether the MAC is connected to a point-to-point LAN or not,
- * the value of operPointToPointMAC shall be 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);
+ 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) {
+ /* If adminPointToPointMAC is set to Auto, then the value of
+ * operPointToPointMAC is determined in accordance with the
+ * specific procedures defined for the MAC entity concerned, as
+ * defined in 6.5. If these procedures determine that the MAC
+ * entity is connected to a point-to-point LAN, then
+ * operPointToPointMAC is set TRUE; otherwise it is set FALSE.
+ * In the absence of a specific definition of how to determine
+ * whether the MAC is connected to a point-to-point LAN or not,
+ * the value of operPointToPointMAC shall be 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);
+ }
}
}
/* Returns the state of port 'p'. */
enum rstp_state
rstp_port_get_state(const struct rstp_port *p)
+ OVS_EXCLUDED(rstp_mutex)
{
enum rstp_state state;
rstp_port_set_admin_edge__(port, is_admin_edge);
rstp_port_set_auto_edge__(port, is_auto_edge);
rstp_port_set_admin_point_to_point_mac__(port, admin_p2p_mac_state);
- rstp_port_set_administrative_bridge_port__(port, admin_port_state);
+ rstp_port_set_administrative_bridge_port__(port, admin_port_state, false);
rstp_port_set_mcheck__(port, do_mcheck);
ovs_mutex_unlock(&rstp_mutex);
}
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