From e0c27cffbc9b93f90c764e374f6944cb893295a3 Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Mon, 24 Aug 2009 11:06:34 -0700 Subject: [PATCH] vswitchd: Mirror nothing, not everything, if mirror ports don't exist. If all of the ports specified as mirror selection criteria actually do not exist, then until now the bridge would mirror all incoming packets (on specified VLAN(s), if any). This matches the behavior that occurs if no mirror selection ports were specified at all, and so it makes a certain amount of logical sense. But it is far more likely that the user simply misspelled a port name, or specified the name of a port that does not always exist. In fact we have seen this behavior in practice when the controller has not caught up to the switch's current configuration. So this commit changes the bridge to instead disable a mirror if ports are specified and none of those ports exist. Bug #1904. --- vswitchd/bridge.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c index 3ffa671a..6ee2ef5e 100644 --- a/vswitchd/bridge.c +++ b/vswitchd/bridge.c @@ -3319,6 +3319,7 @@ mirror_reconfigure_one(struct mirror *m) int *vlans; size_t i; bool mirror_all_ports; + bool any_ports_specified; /* Get output port. */ out_port_name = cfg_get_key(0, "mirror.%s.%s.output.port", @@ -3357,11 +3358,18 @@ mirror_reconfigure_one(struct mirror *m) cfg_get_all_keys(&src_ports, "%s.select.src-port", pfx); cfg_get_all_keys(&dst_ports, "%s.select.dst-port", pfx); cfg_get_all_keys(&ports, "%s.select.port", pfx); + any_ports_specified = src_ports.n || dst_ports.n || ports.n; svec_append(&src_ports, &ports); svec_append(&dst_ports, &ports); svec_destroy(&ports); prune_ports(m, &src_ports); prune_ports(m, &dst_ports); + if (any_ports_specified && !src_ports.n && !dst_ports.n) { + VLOG_ERR("%s: none of the specified ports exist; " + "disabling port mirror %s", pfx, pfx); + mirror_destroy(m); + goto exit; + } /* Get all the vlans, and drop duplicate and invalid vlans. */ svec_init(&vlan_strings); @@ -3413,6 +3421,7 @@ mirror_reconfigure_one(struct mirror *m) } /* Clean up. */ +exit: svec_destroy(&src_ports); svec_destroy(&dst_ports); free(pfx); -- 2.30.2