diff options
| author | Neil Horman <nhorman@tuxdriver.com> | 2009-05-21 11:36:08 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-22 03:50:21 +0400 |
| commit | 4ea7e38696c7e798c47ebbecadfd392f23f814f9 (patch) | |
| tree | 1e144d0c79fb667860ff7fa0ed203984e888ddab /include | |
| parent | d95ed9275edcb8995bda31005bb3f55e087626d7 (diff) | |
| download | linux-4ea7e38696c7e798c47ebbecadfd392f23f814f9.tar.xz | |
dropmon: add ability to detect when hardware dropsrxpackets
Patch to add the ability to detect drops in hardware interfaces via dropwatch.
Adds a tracepoint to net_rx_action to signal everytime a napi instance is
polled. The dropmon code then periodically checks to see if the rx_frames
counter has changed, and if so, adds a drop notification to the netlink
protocol, using the reserved all-0's vector to indicate the drop location was in
hardware, rather than somewhere in the code.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
include/linux/net_dropmon.h | 8 ++
include/trace/napi.h | 11 +++
net/core/dev.c | 5 +
net/core/drop_monitor.c | 124 ++++++++++++++++++++++++++++++++++++++++++--
net/core/net-traces.c | 4 +
net/core/netpoll.c | 2
6 files changed, 149 insertions(+), 5 deletions(-)
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/net_dropmon.h | 8 | ||||
| -rw-r--r-- | include/trace/napi.h | 11 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/net_dropmon.h b/include/linux/net_dropmon.h index 0217fb81a630..e8a8b5c50ed0 100644 --- a/include/linux/net_dropmon.h +++ b/include/linux/net_dropmon.h @@ -2,12 +2,20 @@ #define __NET_DROPMON_H #include <linux/netlink.h> +#include <linux/types.h> struct net_dm_drop_point { __u8 pc[8]; __u32 count; }; +#define is_drop_point_hw(x) do {\ + int ____i, ____j;\ + for (____i = 0; ____i < 8; i ____i++)\ + ____j |= x[____i];\ + ____j;\ +} while (0) + #define NET_DM_CFG_VERSION 0 #define NET_DM_CFG_ALERT_COUNT 1 #define NET_DM_CFG_ALERT_DELAY 2 diff --git a/include/trace/napi.h b/include/trace/napi.h new file mode 100644 index 000000000000..a8989c4547e7 --- /dev/null +++ b/include/trace/napi.h @@ -0,0 +1,11 @@ +#ifndef _TRACE_NAPI_H_ +#define _TRACE_NAPI_H_ + +#include <linux/netdevice.h> +#include <linux/tracepoint.h> + +DECLARE_TRACE(napi_poll, + TP_PROTO(struct napi_struct *napi), + TP_ARGS(napi)); + +#endif |