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net: rmnet_data: Add trace points for device force unassociation 

Added trace points to debug processing time of rmnet_config_notify_cb.
Additionally, tracepoints were added for succesfull associate/unassociate
events. Needed to debug unusually slow cleanup.

New trace points are:
rmnet_unregister_cb_unhandled
rmnet_unregister_cb_entry
rmnet_unregister_cb_exit
rmnet_unregister_cb_clear_vnds
rmnet_unregister_cb_clear_lepcs
rmnet_associate
rmnet_unassociate

Change-Id: I0269435d9c7234ef21092ba13510fff106a1966f
Signed-off-by: Harout Hedeshian <harouth@codeaurora.org>
This commit is contained in:
Harout Hedeshian 2014-12-30 12:15:19 -07:00
parent 968daf1632
commit 968eea64c1
2 changed files with 74 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
net/rmnet_data/rmnet_data_config.c
View File

@ -25,6 +25,7 @@
#include "rmnet_data_handlers.h"
#include "rmnet_data_vnd.h"
#include "rmnet_data_private.h"
#include "rmnet_data_trace.h"
RMNET_LOG_MODULE(RMNET_DATA_LOGMASK_CONFIG);
@ -703,6 +704,7 @@ int rmnet_unassociate_network_device(struct net_device *dev)
/* Explicitly release the reference from the device */
dev_put(dev);
trace_rmnet_unassociate(dev);
return RMNET_CONFIG_OK;
}
@ -835,6 +837,7 @@ int rmnet_associate_network_device(struct net_device *dev)
/* Explicitly hold a reference to the device */
dev_hold(dev);
trace_rmnet_associate(dev);
return RMNET_CONFIG_OK;
}
@ -1146,6 +1149,7 @@ static void rmnet_force_unassociate_device(struct net_device *dev)
return;
}
trace_rmnet_unregister_cb_clear_vnds(dev);
/* Check the VNDs for offending mappings */
for (i = 0; i < RMNET_DATA_MAX_VND; i++) {
vndev = rmnet_vnd_get_by_id(i);
@ -1172,7 +1176,8 @@ static void rmnet_force_unassociate_device(struct net_device *dev)
}
}
/* Clear on the mappings on the phys ep */
/* Clear the mappings on the phys ep */
trace_rmnet_unregister_cb_clear_lepcs(dev);
rmnet_unset_logical_endpoint_config(dev, RMNET_LOCAL_LOGICAL_ENDPOINT);
for (i = 0; i < RMNET_DATA_MAX_LOGICAL_EP; i++)
rmnet_unset_logical_endpoint_config(dev, i);
@ -1201,13 +1206,16 @@ int rmnet_config_notify_cb(struct notifier_block *nb,
switch (event) {
case NETDEV_UNREGISTER_FINAL:
case NETDEV_UNREGISTER:
trace_rmnet_unregister_cb_entry(dev);
if (_rmnet_is_physical_endpoint_associated(dev)) {
LOGH("Kernel is trying to unregister %s", dev->name);
rmnet_force_unassociate_device(dev);
}
trace_rmnet_unregister_cb_exit(dev);
break;
default:
trace_rmnet_unregister_cb_unhandled(dev);
LOGD("Unhandeled event [%lu]", event);
break;
}

65
net/rmnet_data/rmnet_data_trace.h
View File

@ -240,6 +240,71 @@ TRACE_EVENT(rmnet_map_checksum_uplink_packet,
__get_str(name), __entry->res)
)
DECLARE_EVENT_CLASS(rmnet_physdev_action_template,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev),
TP_STRUCT__entry(
__string(name, dev->name)
),
TP_fast_assign(
__assign_str(name, dev->name);
),
TP_printk("Physical dev=%s", __get_str(name))
)
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unregister_cb_unhandled,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unregister_cb_entry,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unregister_cb_exit,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unregister_cb_clear_vnds,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unregister_cb_clear_lepcs,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_associate,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
DEFINE_EVENT(rmnet_physdev_action_template, rmnet_unassociate,
TP_PROTO(struct net_device *dev),
TP_ARGS(dev)
);
#endif /* _RMNET_DATA_TRACE_H_ */
/* This part must be outside protection */