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net: rmnet_data: Add counters for downlink checksum offload return codes 

Added counter array to /sys/module/rmnet_data/parameters/checksum_dl_stats
for non-realtime analysis of checksum offload.

Change-Id: I749c09147325fd0f871c34ff17e2546b68898faa
Signed-off-by: Harout Hedeshian <harouth@codeaurora.org>
This commit is contained in:
Harout Hedeshian 2014-08-26 14:32:51 -06:00
parent b7a97bc998
commit 5b05491d22
3 changed files with 24 additions and 3 deletions
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1
net/rmnet_data/rmnet_data_handlers.c
View File

@ -285,6 +285,7 @@ static rx_handler_result_t _rmnet_map_ingress_handler(struct sk_buff *skb,
if (config->ingress_data_format & RMNET_INGRESS_FORMAT_MAP_CKSUMV3) {
ckresult = rmnet_map_checksum_downlink_packet(skb);
trace_rmnet_map_checksum_downlink_packet(skb, ckresult);
rmnet_stats_dl_checksum(ckresult);
if (likely(ckresult == RMNET_MAP_CHECKSUM_OK))
skb->ip_summed |= CHECKSUM_UNNECESSARY;
else if (ckresult != RMNET_MAP_CHECKSUM_ERR_UNKNOWN_IP_VERSION

25
net/rmnet_data/rmnet_data_stats.c
View File

@ -20,8 +20,11 @@
#include <linux/export.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include "rmnet_data_private.h"
#include "rmnet_data_stats.h"
#include "rmnet_data_config.h"
#include "rmnet_map.h"
enum rmnet_deagg_e {
RMNET_STATS_AGG_BUFF,
@ -37,17 +40,22 @@ MODULE_PARM_DESC(skb_free, "SKBs dropped or freed");
static DEFINE_SPINLOCK(rmnet_queue_xmit_lock);
unsigned long int queue_xmit[RMNET_STATS_QUEUE_XMIT_MAX*2];
module_param_array(queue_xmit, ulong, 0, S_IRUGO);
MODULE_PARM_DESC(queue_xmit, "SKBs queued");
MODULE_PARM_DESC(queue_xmit, "SKBs queued for transmit");
static DEFINE_SPINLOCK(rmnet_deagg_count);
unsigned long int deagg_count[RMNET_STATS_AGG_MAX];
module_param_array(deagg_count, ulong, 0, S_IRUGO);
MODULE_PARM_DESC(deagg_count, "SKBs queued");
MODULE_PARM_DESC(deagg_count, "SKBs De-aggregated");
static DEFINE_SPINLOCK(rmnet_agg_count);
unsigned long int agg_count[RMNET_STATS_AGG_MAX];
module_param_array(agg_count, ulong, 0, S_IRUGO);
MODULE_PARM_DESC(agg_count, "SKBs queued");
MODULE_PARM_DESC(agg_count, "SKBs Aggregated");
static DEFINE_SPINLOCK(rmnet_checksum_dl_stats);
unsigned long int checksum_dl_stats[RMNET_MAP_CHECKSUM_ENUM_LENGTH];
module_param_array(checksum_dl_stats, ulong, 0, S_IRUGO);
MODULE_PARM_DESC(checksum_dl_stats, "Downlink Checksum Statistics");
void rmnet_kfree_skb(struct sk_buff *skb, unsigned int reason)
{
@ -98,3 +106,14 @@ void rmnet_stats_deagg_pkts(int aggcount)
spin_unlock_irqrestore(&rmnet_deagg_count, flags);
}
void rmnet_stats_dl_checksum(unsigned int rc)
{
unsigned long flags;
if (rc >= RMNET_MAP_CHECKSUM_ENUM_LENGTH)
rc = RMNET_MAP_CHECKSUM_ERR_UNKOWN;
spin_lock_irqsave(&rmnet_checksum_dl_stats, flags);
checksum_dl_stats[rc]++;
spin_unlock_irqrestore(&rmnet_checksum_dl_stats, flags);
}

1
net/rmnet_data/rmnet_data_stats.h
View File

@ -55,4 +55,5 @@ void rmnet_kfree_skb(struct sk_buff *skb, unsigned int reason);
void rmnet_stats_queue_xmit(int rc, unsigned int reason);
void rmnet_stats_deagg_pkts(int aggcount);
void rmnet_stats_agg_pkts(int aggcount);
void rmnet_stats_dl_checksum(unsigned int rc);
#endif /* _RMNET_DATA_STATS_H_ */