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| author |   Dave Barach <dave@barachs.net> | 2019-09-13 17:47:50 -0400 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2019-09-20 15:55:25 +0000 |
| commit | 9137e5400699bed9f7c0095187839a8b38273100 (patch) | |
| tree | b4f0b34583c8e4add09b34e8a4c52a5606b2dc55 /src/vnet/interface_output.c | |
| parent | 864d857c6c223be8ec11c588d65e8c5c2e211814 (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.c | 19 |
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--; } } |