From: Roopa Prabhu <ro...@cumulusnetworks.com>
A few useful tracepoints to trace bridge forwarding
database updates.
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
---
v2 - address comments from Florian
include/trace/events/bridge.h | 98 +++++++++++++++++++++++++++++++++++++++++
net/bridge/br_fdb.c | 7 +++
net/core/net-traces.c | 6 +++
3 files changed, 111 insertions(+)
create mode 100644 include/trace/events/bridge.h
diff --git a/include/trace/events/bridge.h b/include/trace/events/bridge.h
new file mode 100644
index 0000000..3a4ecc3
--- /dev/null
+++ b/include/trace/events/bridge.h
@@ -0,0 +1,98 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM bridge
+
+#if !defined(_TRACE_BRIDGE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_BRIDGE_H
+
+#include <linux/netdevice.h>
+#include <linux/tracepoint.h>
+
+#include "../../../net/bridge/br_private.h"
+
+TRACE_EVENT(br_fdb_add,
+
+ TP_PROTO(struct ndmsg *ndm, struct net_device *dev,
+ const unsigned char *addr, u16 vid, u16 nlh_flags),
+
+ TP_ARGS(ndm, dev, addr, vid, nlh_flags),
+
+ TP_STRUCT__entry(
+ __field(u8, ndm_flags)
+ __string(dev, dev->name)
+ __array(unsigned char, addr, ETH_ALEN)
+ __field(u16, vid)
+ __field(u16, nlh_flags)
+ ),
+
+ TP_fast_assign(
+ __assign_str(dev, dev->name);
+ memcpy(__entry->addr, addr, ETH_ALEN);
+ __entry->vid = vid;
+ __entry->nlh_flags = nlh_flags;
+ __entry->ndm_flags = ndm->ndm_flags;
+ ),
+
+ TP_printk("dev %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u nlh_flags
%04x ndm_flags = %02x",
+ __get_str(dev), __entry->addr[0], __entry->addr[1],
+ __entry->addr[2], __entry->addr[3], __entry->addr[4],
+ __entry->addr[5], __entry->vid,
+ __entry->nlh_flags, __entry->ndm_flags)
+);
+
+TRACE_EVENT(br_fdb_external_learn_add,
+
+ TP_PROTO(struct net_bridge *br, struct net_bridge_port *p,
+ const unsigned char *addr, u16 vid),
+
+ TP_ARGS(br, p, addr, vid),
+
+ TP_STRUCT__entry(
+ __string(br_dev, br->dev->name)
+ __string(dev, p->dev->name)
+ __array(unsigned char, addr, ETH_ALEN)
+ __field(u16, vid)
+ ),
+
+ TP_fast_assign(
+ __assign_str(br_dev, br ? br->dev->name : "null");
+ __assign_str(dev, p ? p->dev->name : "null");
+ memcpy(__entry->addr, addr, ETH_ALEN);
+ __entry->vid = vid;
+ ),
+
+ TP_printk("br_dev %s port %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u",
+ __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)
+);
+
+TRACE_EVENT(fdb_delete,
+
+ TP_PROTO(struct net_bridge *br, struct net_bridge_fdb_entry *f),
+
+ TP_ARGS(br, f),
+
+ TP_STRUCT__entry(
+ __string(br_dev, br->dev->name)
+ __string(dev, f->dst ? f->dst->dev->name : "null")
+ __array(unsigned char, addr, ETH_ALEN)
+ __field(u16, vid)
+ ),
+
+ TP_fast_assign(
+ __assign_str(br_dev, br ? br->dev->name : "null");
+ __assign_str(dev, f->dst ? f->dst->dev->name : "null");
+ memcpy(__entry->addr, f->addr.addr, ETH_ALEN);
+ __entry->vid = f->vlan_id;
+ ),
+
+ TP_printk("br_dev %s dev %s addr %02x:%02x:%02x:%02x:%02x:%02x vid %u",
+ __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)
+);
+
+#endif /* _TRACE_BRIDGE_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index a79b648..be5e1da 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -25,6 +25,7 @@
#include <asm/unaligned.h>
#include <linux/if_vlan.h>
#include <net/switchdev.h>
+#include <trace/events/bridge.h>
#include "br_private.h"
static struct kmem_cache *br_fdb_cache __read_mostly;
@@ -171,6 +172,8 @@ static void fdb_del_hw_addr(struct net_bridge *br, const
unsigned char *addr)
static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
{
+ trace_fdb_delete(br, f);
+
if (f->is_static)
fdb_del_hw_addr(br, f->addr.addr);
@@ -870,6 +873,8 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_bridge *br = NULL;
int err = 0;
+ trace_br_fdb_add(ndm, dev, addr, vid, nlh_flags);
+
if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n",
ndm->ndm_state);
return -EINVAL;
@@ -1066,6 +1071,8 @@ int br_fdb_external_learn_add(struct net_bridge *br,
struct net_bridge_port *p,
bool modified = false;
int err = 0;
+ trace_br_fdb_external_learn_add(br, p, addr, vid);
+
spin_lock_bh(&br->hash_lock);
head = &br->hash[br_mac_hash(addr, vid)];
diff --git a/net/core/net-traces.c b/net/core/net-traces.c
index 4f1468c..4a0292c 100644
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c
@@ -37,6 +37,12 @@
#include <trace/events/fib6.h>
EXPORT_TRACEPOINT_SYMBOL_GPL(fib6_table_lookup);
#endif
+#if IS_ENABLED(CONFIG_BRIDGE)
+#include <trace/events/bridge.h>
+EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_add);
+EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_external_learn_add);
+EXPORT_TRACEPOINT_SYMBOL_GPL(fdb_delete);
+#endif
EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);
--
1.7.10.4
