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devlink: add hardware errors tracing facility
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>
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2 changed files with 34 additions and 0 deletions
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@ -46,6 +46,35 @@ TRACE_EVENT(devlink_hwmsg,
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(int) __entry->len, __get_dynamic_array(buf), __entry->len)
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);
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/*
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* Tracepoint for devlink hardware error:
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*/
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TRACE_EVENT(devlink_hwerr,
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TP_PROTO(const struct devlink *devlink, int err, const char *msg),
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TP_ARGS(devlink, err, msg),
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TP_STRUCT__entry(
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__string(bus_name, devlink->dev->bus->name)
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__string(dev_name, dev_name(devlink->dev))
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__string(driver_name, devlink->dev->driver->name)
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__field(int, err)
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__string(msg, msg)
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),
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TP_fast_assign(
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__assign_str(bus_name, devlink->dev->bus->name);
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__assign_str(dev_name, dev_name(devlink->dev));
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__assign_str(driver_name, devlink->dev->driver->name);
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__entry->err = err;
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__assign_str(msg, msg);
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),
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TP_printk("bus_name=%s dev_name=%s driver_name=%s err=%d %s",
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__get_str(bus_name), __get_str(dev_name),
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__get_str(driver_name), __entry->err, __get_str(msg))
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);
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#endif /* _TRACE_DEVLINK_H */
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/* This part must be outside protection */
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@ -64,6 +93,10 @@ static inline void trace_devlink_hwmsg(const struct devlink *devlink,
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{
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}
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static inline void trace_devlink_hwerr(const struct devlink *devlink,
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int err, const char *msg)
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{
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}
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#endif /* _TRACE_DEVLINK_H */
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#endif
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@ -81,6 +81,7 @@ struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
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EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
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EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
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EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
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static LIST_HEAD(devlink_list);
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