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devlink: Add health report functionality

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Upon error discover, every driver can report it to the devlink health
mechanism via devlink_health_report function, using the appropriate
reporter registered to it. Driver can pass error specific context which
will be delivered to it as part of the dump / recovery callbacks.

Once an error is reported, devlink health will do the following actions:
* A log is being send to the kernel trace events buffer
* Health status and statistics are being updated for the reporter instance
* Object dump is being taken and stored at the reporter instance (as long
  as there is no other dump which is already stored)
* Auto recovery attempt is being done. Depends on:
  - Auto Recovery configuration
  - Grace period vs. Time since last recover

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eran Ben Elisha
2019-02-07 11:36:34 +02:00
committed by David S. Miller
parent a0bdcc59d1
commit c8e1da0bf9
3 changed files with 193 additions and 0 deletions
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65
include/trace/events/devlink.h
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@@ -75,6 +75,71 @@ TRACE_EVENT(devlink_hwerr,
__get_str(driver_name), __entry->err, __get_str(msg))
);
/*
* Tracepoint for devlink health message:
*/
TRACE_EVENT(devlink_health_report,
TP_PROTO(const struct devlink *devlink, const char *reporter_name,
const char *msg),
TP_ARGS(devlink, reporter_name, 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)
__string(reporter_name, msg)
__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);
__assign_str(reporter_name, reporter_name);
__assign_str(msg, msg);
),
TP_printk("bus_name=%s dev_name=%s driver_name=%s reporter_name=%s: %s",
__get_str(bus_name), __get_str(dev_name),
__get_str(driver_name), __get_str(reporter_name),
__get_str(msg))
);
/*
* Tracepoint for devlink health recover aborted message:
*/
TRACE_EVENT(devlink_health_recover_aborted,
TP_PROTO(const struct devlink *devlink, const char *reporter_name,
bool health_state, u64 time_since_last_recover),
TP_ARGS(devlink, reporter_name, health_state, time_since_last_recover),
TP_STRUCT__entry(
__string(bus_name, devlink->dev->bus->name)
__string(dev_name, dev_name(devlink->dev))
__string(driver_name, devlink->dev->driver->name)
__string(reporter_name, reporter_name)
__field(bool, health_state)
__field(u64, time_since_last_recover)
),
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);
__assign_str(reporter_name, reporter_name);
__entry->health_state = health_state;
__entry->time_since_last_recover = time_since_last_recover;
),
TP_printk("bus_name=%s dev_name=%s driver_name=%s reporter_name=%s: health_state=%d time_since_last_recover=%llu recover aborted",
__get_str(bus_name), __get_str(dev_name),
__get_str(driver_name), __get_str(reporter_name),
__entry->health_state,
__entry->time_since_last_recover)
);
#endif /* _TRACE_DEVLINK_H */
/* This part must be outside protection */