From: Vladimir Oltean <vladimir.oltean@xxxxxxx>
commit 9e3d9ae52b5657399a7b61258cc7482434a911bb upstream.
It is possible to trigger these VTU violation messages very easily,
it's only necessary to send packets with an unknown VLAN ID to a port
that belongs to a VLAN-aware bridge.
Do a similar thing as for ATU violation messages, and hide them in the
kernel's trace buffer.
New usage model:
$ trace-cmd list | grep mv88e6xxx
mv88e6xxx
mv88e6xxx:mv88e6xxx_vtu_miss_violation
mv88e6xxx:mv88e6xxx_vtu_member_violation
$ trace-cmd report
Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Reviewed-by: Saeed Mahameed <saeed@xxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/dsa/mv88e6xxx/global1_vtu.c | 7 +++----
drivers/net/dsa/mv88e6xxx/trace.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 4 deletions(-)
--- a/drivers/net/dsa/mv88e6xxx/global1_vtu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_vtu.c
@@ -13,6 +13,7 @@
#include "chip.h"
#include "global1.h"
+#include "trace.h"
/* Offset 0x02: VTU FID Register */
@@ -628,14 +629,12 @@ static irqreturn_t mv88e6xxx_g1_vtu_prob
spid = val & MV88E6XXX_G1_VTU_OP_SPID_MASK;
if (val & MV88E6XXX_G1_VTU_OP_MEMBER_VIOLATION) {
- dev_err_ratelimited(chip->dev, "VTU member violation for vid %d, source port %d\n",
- vid, spid);
+ trace_mv88e6xxx_vtu_member_violation(chip->dev, spid, vid);
chip->ports[spid].vtu_member_violation++;
}
if (val & MV88E6XXX_G1_VTU_OP_MISS_VIOLATION) {
- dev_dbg_ratelimited(chip->dev, "VTU miss violation for vid %d, source port %d\n",
- vid, spid);
+ trace_mv88e6xxx_vtu_miss_violation(chip->dev, spid, vid);
chip->ports[spid].vtu_miss_violation++;
}
--- a/drivers/net/dsa/mv88e6xxx/trace.h
+++ b/drivers/net/dsa/mv88e6xxx/trace.h
@@ -55,6 +55,36 @@ DEFINE_EVENT(mv88e6xxx_atu_violation, mv
const unsigned char *addr, u16 fid),
TP_ARGS(dev, spid, portvec, addr, fid));
+DECLARE_EVENT_CLASS(mv88e6xxx_vtu_violation,
+
+ TP_PROTO(const struct device *dev, int spid, u16 vid),
+
+ TP_ARGS(dev, spid, vid),
+
+ TP_STRUCT__entry(
+ __string(name, dev_name(dev))
+ __field(int, spid)
+ __field(u16, vid)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, dev_name(dev));
+ __entry->spid = spid;
+ __entry->vid = vid;
+ ),
+
+ TP_printk("dev %s spid %d vid %u",
+ __get_str(name), __entry->spid, __entry->vid)
+);
+
+DEFINE_EVENT(mv88e6xxx_vtu_violation, mv88e6xxx_vtu_member_violation,
+ TP_PROTO(const struct device *dev, int spid, u16 vid),
+ TP_ARGS(dev, spid, vid));
+
+DEFINE_EVENT(mv88e6xxx_vtu_violation, mv88e6xxx_vtu_miss_violation,
+ TP_PROTO(const struct device *dev, int spid, u16 vid),
+ TP_ARGS(dev, spid, vid));
+
#endif /* _MV88E6XXX_TRACE_H */
/* We don't want to use include/trace/events */
