From: Roopa Prabhu <roopa@cumulusnetworks.com>
Date: Wed, 30 Aug 2017 22:18:13 -0700
Subject: bridge: add tracepoint in br_fdb_update
Patch-mainline: v4.14-rc1
Git-commit: e3cfddd577e763496c25ddb855cfff48b1174b63
References: bsc#1112374
This extends bridge fdb table tracepoints to also cover
learned fdb entries in the br_fdb_update path. Note that
unlike other tracepoints I have moved this to when the fdb
is modified because this is in the datapath and can generate
a lot of noise in the trace output. br_fdb_update is also called
from added_by_user context in the NTF_USE case which is already
traced ..hence the !added_by_user check.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/trace/events/bridge.h | 31 +++++++++++++++++++++++++++++++
net/bridge/br_fdb.c | 5 ++++-
net/core/net-traces.c | 1 +
3 files changed, 36 insertions(+), 1 deletion(-)
--- a/include/trace/events/bridge.h
+++ b/include/trace/events/bridge.h
@@ -92,6 +92,37 @@ TRACE_EVENT(fdb_delete,
__entry->addr[4], __entry->addr[5], __entry->vid)
);
+TRACE_EVENT(br_fdb_update,
+
+ TP_PROTO(struct net_bridge *br, struct net_bridge_port *source,
+ const unsigned char *addr, u16 vid, bool added_by_user),
+
+ TP_ARGS(br, source, addr, vid, added_by_user),
+
+ TP_STRUCT__entry(
+ __string(br_dev, br->dev->name)
+ __string(dev, source->dev->name)
+ __array(unsigned char, addr, ETH_ALEN)
+ __field(u16, vid)
+ __field(bool, added_by_user)
+ ),
+
+ TP_fast_assign(
+ __assign_str(br_dev, br->dev->name);
+ __assign_str(dev, source->dev->name);
+ memcpy(__entry->addr, addr, ETH_ALEN);
+ __entry->vid = vid;
+ __entry->added_by_user = added_by_user;
+ ),
+
+ TP_printk("br_dev %s source %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u added_by_user %d",
+ __get_str(br_dev), __get_str(dev), __entry->addr[0],
+ __entry->addr[1], __entry->addr[2], __entry->addr[3],
+ __entry->addr[4], __entry->addr[5], __entry->vid,
+ __entry->added_by_user)
+);
+
+
#endif /* _TRACE_BRIDGE_H */
/* This part must be outside protection */
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -601,8 +601,10 @@ void br_fdb_update(struct net_bridge *br
fdb->updated = now;
if (unlikely(added_by_user))
fdb->added_by_user = 1;
- if (unlikely(fdb_modified))
+ if (unlikely(fdb_modified)) {
+ trace_br_fdb_update(br, source, addr, vid, added_by_user);
fdb_notify(br, fdb, RTM_NEWNEIGH);
+ }
}
} else {
spin_lock(&br->hash_lock);
@@ -611,6 +613,7 @@ void br_fdb_update(struct net_bridge *br
if (fdb) {
if (unlikely(added_by_user))
fdb->added_by_user = 1;
+ trace_br_fdb_update(br, source, addr, vid, added_by_user);
fdb_notify(br, fdb, RTM_NEWNEIGH);
}
}
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c
@@ -41,6 +41,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(fib6_table_
EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_external_learn_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(fdb_delete);
+EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_update);
#endif
EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);