On Sun, Aug 27, 2017 at 7:11 PM, Florian Fainelli <f.fainelli@xxxxxxxxx> wrote:
> On 08/27/2017 02:33 PM, Roopa Prabhu wrote:
>> From: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
>>
>> Tracepoints to trace bridge forwarding database updates.
>
> Thanks for adding this!
>
>>
>> Signed-off-by: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
>> ---
>> 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..e2d52cf
>> --- /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, 6)
>
> Can you use ETH_ALEN instead of 6 here?
>
>> + __field(u16, vid)
>> + __field(u16, nlh_flags)
>> + ),
>> +
>> + TP_fast_assign(
>> + __assign_str(dev, dev->name);
>> + memcpy(__entry->addr, addr, 6);
>
> Likewise
>
>> + __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 %x ndm_flags = %x",
>
> I wonder if we could make %pM work for TP_printk() as this would
> simplify the argument list a bitt. Can you use %04x for vid, nlh_flags
> and %02x for ndm_flags?
one thing here.., i think %u is better for vid. bridge driver debug
prints also use %u for vid.
