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authorDave Barach <dave@barachs.net>2019-09-13 17:47:50 -0400
committerFlorin Coras <florin.coras@gmail.com>2019-09-20 15:55:25 +0000
commit9137e5400699bed9f7c0095187839a8b38273100 (patch)
treeb4f0b34583c8e4add09b34e8a4c52a5606b2dc55 /src/vnet/interface_output.c
parent864d857c6c223be8ec11c588d65e8c5c2e211814 (diff)
misc: classifier-based packet trace filter
See .../src/vnet/classify/trace_classify.h for the business end of the scheme. It would be best to hash pkts, prefetch buckets, and do the primary table lookups two at a time. The inline as given works, but perf tuning will be required. "At least it works..." Add "classify filter" debug cli, for example: classify filter mask l3 ip4 src dst \ match l3 ip4 dst 192.168.2.10 src 192.168.1.10 Add "pcap rx | tx trace ... filter" to use the current classify filter chain Patch includes sphinx documentation and doxygen tags. Next step: device-driver integration Type: feature Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I05b1358a769f61e6d32470e0c87058f640486b26
Diffstat (limited to 'src/vnet/interface_output.c')
-rw-r--r--src/vnet/interface_output.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/src/vnet/interface_output.c b/src/vnet/interface_output.c
index f51e9a1f27d..1506db91ea9 100644
--- a/src/vnet/interface_output.c
+++ b/src/vnet/interface_output.c
@@ -43,6 +43,7 @@
#include <vnet/ip/ip6.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/feature/feature.h>
+#include <vnet/classify/trace_classify.h>
typedef struct
{
@@ -813,13 +814,29 @@ static_always_inline void vnet_interface_pcap_tx_trace
else
sw_if_index = ~0;
+ vnet_main_t *vnm = vnet_get_main ();
n_left_from = frame->n_vectors;
from = vlib_frame_vector_args (frame);
while (n_left_from > 0)
{
+ int classify_filter_result;
u32 bi0 = from[0];
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ from++;
+ n_left_from--;
+
+ if (vec_len (vnm->classify_filter_table_indices))
+ {
+ classify_filter_result =
+ vnet_is_packet_traced_inline
+ (b0, vnm->classify_filter_table_indices[0],
+ 0 /* full classify */ );
+ if (classify_filter_result)
+ pcap_add_buffer (&vlib_global_main.pcap[VLIB_TX].pcap_main, vm,
+ bi0, 512);
+ continue;
+ }
if (sw_if_index_from_buffer)
sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
@@ -828,8 +845,6 @@ static_always_inline void vnet_interface_pcap_tx_trace
vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
pcap_add_buffer (&vlib_global_main.pcap[VLIB_TX].pcap_main, vm, bi0,
512);
- from++;
- n_left_from--;
}
}