}
}
+/* Returns the effective vlan of a packet, taking into account both the
+ * 802.1Q header and implicitly tagged ports. A value of 0 indicates that
+ * the packet is untagged and -1 indicates it has an invalid header and
+ * should be dropped. */
+static int flow_get_vlan(struct bridge *br, const flow_t *flow,
+ struct port *in_port, bool have_packet)
+{
+ /* Note that dl_vlan of 0 and of OFP_VLAN_NONE both mean that the packet
+ * belongs to VLAN 0, so we should treat both cases identically. (In the
+ * former case, the packet has an 802.1Q header that specifies VLAN 0,
+ * presumably to allow a priority to be specified. In the latter case, the
+ * packet does not have any 802.1Q header.) */
+ int vlan = ntohs(flow->dl_vlan);
+ if (vlan == OFP_VLAN_NONE) {
+ vlan = 0;
+ }
+ if (in_port->vlan >= 0) {
+ if (vlan) {
+ /* XXX support double tagging? */
+ if (have_packet) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
+ "packet received on port %s configured with "
+ "implicit VLAN %"PRIu16,
+ br->name, ntohs(flow->dl_vlan),
+ in_port->name, in_port->vlan);
+ }
+ return -1;
+ }
+ vlan = in_port->vlan;
+ } else {
+ if (!port_includes_vlan(in_port, vlan)) {
+ if (have_packet) {
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+ VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
+ "packet received on port %s not configured for "
+ "trunking VLAN %d",
+ br->name, vlan, in_port->name, vlan);
+ }
+ return -1;
+ }
+ }
+
+ return vlan;
+}
+
+static void
+update_learning_table(struct bridge *br, const flow_t *flow, int vlan,
+ struct port *in_port)
+{
+ tag_type rev_tag = mac_learning_learn(br->ml, flow->dl_src,
+ vlan, in_port->port_idx);
+ if (rev_tag) {
+ /* The log messages here could actually be useful in debugging,
+ * so keep the rate limit relatively high. */
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30,
+ 300);
+ VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
+ "on port %s in VLAN %d",
+ br->name, ETH_ADDR_ARGS(flow->dl_src),
+ in_port->name, vlan);
+ ofproto_revalidate(br->ofproto, rev_tag);
+ }
+}
+
static bool
is_bcast_arp_reply(const flow_t *flow)
{
return true;
}
in_port = in_iface->port;
-
- /* Figure out what VLAN this packet belongs to.
- *
- * Note that dl_vlan of 0 and of OFP_VLAN_NONE both mean that the packet
- * belongs to VLAN 0, so we should treat both cases identically. (In the
- * former case, the packet has an 802.1Q header that specifies VLAN 0,
- * presumably to allow a priority to be specified. In the latter case, the
- * packet does not have any 802.1Q header.) */
- vlan = ntohs(flow->dl_vlan);
- if (vlan == OFP_VLAN_NONE) {
- vlan = 0;
- }
- if (in_port->vlan >= 0) {
- if (vlan) {
- /* XXX support double tagging? */
- if (packet != NULL) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
- "packet received on port %s configured with "
- "implicit VLAN %"PRIu16,
- br->name, ntohs(flow->dl_vlan),
- in_port->name, in_port->vlan);
- }
- goto done;
- }
- vlan = in_port->vlan;
- } else {
- if (!port_includes_vlan(in_port, vlan)) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
- VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
- "packet received on port %s not configured for "
- "trunking VLAN %d",
- br->name, vlan, in_port->name, vlan);
- goto done;
- }
+ vlan = flow_get_vlan(br, flow, in_port, !!packet);
+ if (vlan < 0) {
+ goto done;
}
/* Drop frames for ports that STP wants entirely killed (both for
out_port = FLOOD_PORT;
/* Learn source MAC (but don't try to learn from revalidation). */
if (packet) {
- tag_type rev_tag = mac_learning_learn(br->ml, flow->dl_src,
- vlan, in_port->port_idx);
- if (rev_tag) {
- /* The log messages here could actually be useful in debugging,
- * so keep the rate limit relatively high. */
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30,
- 300);
- VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
- "on port %s in VLAN %d",
- br->name, ETH_ADDR_ARGS(flow->dl_src),
- in_port->name, vlan);
- ofproto_revalidate(br->ofproto, rev_tag);
- }
+ update_learning_table(br, flow, vlan, in_port);
}
/* Determine output port. */
tags);
if (out_port_idx >= 0 && out_port_idx < br->n_ports) {
out_port = br->ports[out_port_idx];
- } else if (!packet) {
+ } else if (!packet && !eth_addr_is_multicast(flow->dl_dst)) {
/* If we are revalidating but don't have a learning entry then
- * eject the flow. Installing a flow that floods packets will
- * prevent us from seeing future packets and learning properly. */
+ * eject the flow. Installing a flow that floods packets opens
+ * up a window of time where we could learn from a packet reflected
+ * on a bond and blackhole packets before the learning table is
+ * updated to reflect the correct port. */
return false;
}
void *br_)
{
struct bridge *br = br_;
+ struct port *in_port;
const union odp_action *a;
+ /* Feed information from the active flows back into the learning table
+ * to ensure that table is always in sync with what is actually flowing
+ * through the datapath. */
+ in_port = port_from_dp_ifidx(br, flow->in_port);
+ if (in_port) {
+ int vlan = flow_get_vlan(br, flow, in_port, false);
+ if (vlan >= 0) {
+ update_learning_table(br, flow, vlan, in_port);
+ }
+ }
+
if (!br->has_bonded_ports) {
return;
}
for (a = actions; a < &actions[n_actions]; a++) {
if (a->type == ODPAT_OUTPUT) {
- struct port *port = port_from_dp_ifidx(br, a->output.port);
- if (port && port->n_ifaces >= 2) {
- struct bond_entry *e = lookup_bond_entry(port, flow->dl_src);
+ struct port *out_port = port_from_dp_ifidx(br, a->output.port);
+ if (out_port && out_port->n_ifaces >= 2) {
+ struct bond_entry *e = lookup_bond_entry(out_port,
+ flow->dl_src);
e->tx_bytes += n_bytes;
}
}
int vlan = cfg_get_vlan(i, "vlan.%s.disable-learning", br->name);
if (vlan >= 0) {
bitmap_set1(rspan_vlans, vlan);
+ VLOG_INFO("bridge %s: disabling learning on vlan %d\n",
+ br->name, vlan);
} else {
VLOG_ERR("bridge %s: invalid value '%s' for learning disabled "
"VLAN", br->name,
--- /dev/null
+The files etc_xensource_scripts_vif and
+opt_xensource_libexec_interface-reconfigure are distributed under the
+terms of the GNU Lesser General Public License version 2.1 (included
+below).
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+may link, statically or dynamically, a "work that uses the Library"
+with a publicly distributed version of the Library to produce an
+executable file containing portions of the Library, and distribute
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+Public License. By "a publicly distributed version of the Library",
+we mean either the unmodified Library as distributed, or a
+modified version of the Library that is distributed under the
+conditions defined in clause 3 of the GNU Library General Public
+License. This exception does not however invalidate any other reasons
+why the executable file might be covered by the GNU Lesser General
+Public License.
+
+------------
+
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+\f
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+ Yoyodyne, Inc., hereby disclaims all copyright interest in the
+ library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+ <signature of Ty Coon>, 1 April 1990
+ Ty Coon, President of Vice
+
+That's all there is to it!
git://git.onelab.eu / sliver-openvswitch.git / commitdiff