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devlink: add hardware errors tracing facility

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Define a tracepoint and allow user to trace messages in case of an hardware
error code for hardware associated with devlink instance.

Signed-off-by: Nir Dotan <nird@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nir Dotan 2019-02-04 18:47:45 +00:00 committed by David S. Miller
parent 8ce5cd5ed4
commit 57186a5f43
2 changed files with 34 additions and 0 deletions
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33
include/trace/events/devlink.h
View file

@ -46,6 +46,35 @@ TRACE_EVENT(devlink_hwmsg,
(int) __entry->len, __get_dynamic_array(buf), __entry->len)
);
/*
* Tracepoint for devlink hardware error:
*/
TRACE_EVENT(devlink_hwerr,
TP_PROTO(const struct devlink *devlink, int err, const char *msg),
TP_ARGS(devlink, err, msg),
TP_STRUCT__entry(
__string(bus_name, devlink->dev->bus->name)
__string(dev_name, dev_name(devlink->dev))
__string(driver_name, devlink->dev->driver->name)
__field(int, err)
__string(msg, msg)
),
TP_fast_assign(
__assign_str(bus_name, devlink->dev->bus->name);
__assign_str(dev_name, dev_name(devlink->dev));
__assign_str(driver_name, devlink->dev->driver->name);
__entry->err = err;
__assign_str(msg, msg);
),
TP_printk("bus_name=%s dev_name=%s driver_name=%s err=%d %s",
__get_str(bus_name), __get_str(dev_name),
__get_str(driver_name), __entry->err, __get_str(msg))
);
#endif /* _TRACE_DEVLINK_H */
/* This part must be outside protection */
@ -64,6 +93,10 @@ static inline void trace_devlink_hwmsg(const struct devlink *devlink,
{
}
static inline void trace_devlink_hwerr(const struct devlink *devlink,
int err, const char *msg)
{
}
#endif /* _TRACE_DEVLINK_H */
#endif

1
net/core/devlink.c
View file

@ -81,6 +81,7 @@ struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
static LIST_HEAD(devlink_list);