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authorDave Barach <dave@barachs.net>2019-12-04 17:19:12 -0500
committerDave Barach <dave@barachs.net>2020-02-12 09:42:05 -0500
commit7c5a3536ce4c2fd4157c466367c495cefecaa52e (patch)
treefe6e70be8b1d2e0a594b0268d7a51962155b65a5 /src
parentd28bac409409ea821cd9ce2ec4f84a7786cbcb73 (diff)
classify: vpp packet tracer support
Configure n-tuple classifier filters which apply to the vpp packet tracer. Update the documentation to reflect the new feature. Add a test vector. Type: feature Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Iefa911716c670fc12e4825b937b62044433fec36 (cherry picked from commit 87d24db65facb89ca524c951b8379ca2ec4dbc7a)
Diffstat (limited to 'src')
-rw-r--r--src/vlib/main.h10
-rw-r--r--src/vlib/trace.c33
-rw-r--r--src/vlib/trace_funcs.h16
-rwxr-xr-xsrc/vnet/classify/vnet_classify.c151
4 files changed, 177 insertions, 33 deletions
diff --git a/src/vlib/main.h b/src/vlib/main.h
index e230ddf8419..af6539efc75 100644
--- a/src/vlib/main.h
+++ b/src/vlib/main.h
@@ -73,6 +73,13 @@ typedef struct
u32 filter_classify_table_index;
} vnet_pcap_t;
+typedef struct
+{
+ u8 trace_filter_enable;
+ u32 trace_classify_table_index;
+ u32 trace_filter_set_index;
+} vlib_trace_filter_t;
+
typedef struct vlib_main_t
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -165,6 +172,9 @@ typedef struct vlib_main_t
/* pcap rx / tx tracing */
vnet_pcap_t pcap;
+ /* Packet trace capture filter */
+ vlib_trace_filter_t trace_filter;
+
/* Error handling. */
vlib_error_main_t error_main;
diff --git a/src/vlib/trace.c b/src/vlib/trace.c
index 530598d349d..7ee1b63f07e 100644
--- a/src/vlib/trace.c
+++ b/src/vlib/trace.c
@@ -351,6 +351,13 @@ VLIB_CLI_COMMAND (show_trace_cli,static) = {
};
/* *INDENT-ON* */
+int vlib_enable_disable_pkt_trace_filter (int enable) __attribute__ ((weak));
+int
+vlib_enable_disable_pkt_trace_filter (int enable)
+{
+ return 0;
+}
+
static clib_error_t *
cli_add_trace_buffer (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
@@ -361,6 +368,7 @@ cli_add_trace_buffer (vlib_main_t * vm,
vlib_trace_node_t *tn;
u32 node_index, add;
u8 verbose = 0;
+ int filter = 0;
clib_error_t *error = 0;
if (!unformat_user (input, unformat_line_input, line_input))
@@ -376,6 +384,8 @@ cli_add_trace_buffer (vlib_main_t * vm,
;
else if (unformat (line_input, "verbose"))
verbose = 1;
+ else if (unformat (line_input, "filter"))
+ filter = 1;
else
{
error = clib_error_create ("expected NODE COUNT, got `%U'",
@@ -395,6 +405,15 @@ cli_add_trace_buffer (vlib_main_t * vm,
goto done;
}
+ if (filter)
+ {
+ if (vlib_enable_disable_pkt_trace_filter (1 /* enable */ ))
+ {
+ error = clib_error_create ("No packet trace filter configured...");
+ goto done;
+ }
+ }
+
/* *INDENT-OFF* */
foreach_vlib_main ((
{
@@ -421,7 +440,6 @@ VLIB_CLI_COMMAND (add_trace_cli,static) = {
};
/* *INDENT-ON* */
-
/*
* Configure a filter for packet traces.
*
@@ -523,6 +541,7 @@ static clib_error_t *
cli_clear_trace_buffer (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
+ vlib_enable_disable_pkt_trace_filter (0 /* enable */ );
clear_trace_buffer ();
return 0;
}
@@ -541,6 +560,18 @@ vlib_trace_cli_reference (void)
{
}
+int
+vnet_is_packet_traced (vlib_buffer_t * b,
+ u32 classify_table_index, int func)
+__attribute__ ((weak));
+
+int
+vnet_is_packet_traced (vlib_buffer_t * b, u32 classify_table_index, int func)
+{
+ clib_warning ("BUG: STUB called");
+ return 1;
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
diff --git a/src/vlib/trace_funcs.h b/src/vlib/trace_funcs.h
index 257c3a3a4ff..4261f675aec 100644
--- a/src/vlib/trace_funcs.h
+++ b/src/vlib/trace_funcs.h
@@ -61,6 +61,9 @@ vlib_add_trace (vlib_main_t * vm,
ASSERT (vnet_trace_dummy);
+ if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_IS_TRACED) == 0))
+ return vnet_trace_dummy;
+
if (PREDICT_FALSE (tm->add_trace_callback != 0))
{
return tm->add_trace_callback ((struct vlib_main_t *) vm,
@@ -118,6 +121,9 @@ vlib_trace_next_frame (vlib_main_t * vm,
}
void trace_apply_filter (vlib_main_t * vm);
+int vnet_is_packet_traced (vlib_buffer_t * b,
+ u32 classify_table_index, int func);
+
/* Mark buffer as traced and allocate trace buffer. */
always_inline void
@@ -131,6 +137,16 @@ vlib_trace_buffer (vlib_main_t * vm,
if (PREDICT_FALSE (tm->trace_enable == 0))
return;
+ /* Classifier filter in use? */
+ if (PREDICT_FALSE (vlib_global_main.trace_filter.trace_filter_enable))
+ {
+ /* See if we're supposed to trace this packet... */
+ if (vnet_is_packet_traced
+ (b, vlib_global_main.trace_filter.trace_classify_table_index,
+ 0 /* full classify */ ) != 1)
+ return;
+ }
+
/*
* Apply filter to existing traces to keep number of allocated traces low.
* Performed each time around the main loop.
diff --git a/src/vnet/classify/vnet_classify.c b/src/vnet/classify/vnet_classify.c
index 938f583ef57..3d338d15d07 100755
--- a/src/vnet/classify/vnet_classify.c
+++ b/src/vnet/classify/vnet_classify.c
@@ -19,6 +19,7 @@
#include <vnet/l2/l2_classify.h> /* for L2_INPUT_CLASSIFY_NEXT_xxx */
#include <vnet/fib/fib_table.h>
#include <vppinfra/lock.h>
+#include <vnet/classify/trace_classify.h>
/**
* @file
@@ -1692,12 +1693,14 @@ classify_filter_command_fn (vlib_main_t * vm,
u32 current_data_flag = 0;
int current_data_offset = 0;
u32 sw_if_index = ~0;
+ int pkt_trace = 0;
int i;
vnet_classify_table_t *t;
u8 *mask = 0;
vnet_classify_main_t *cm = &vnet_classify_main;
int rv = 0;
vnet_classify_filter_set_t *set = 0;
+ u32 set_index = ~0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
@@ -1705,6 +1708,8 @@ classify_filter_command_fn (vlib_main_t * vm,
is_add = 0;
else if (unformat (input, "pcap %=", &sw_if_index, 0))
;
+ else if (unformat (input, "trace"))
+ pkt_trace = 1;
else if (unformat (input, "%U",
unformat_vnet_sw_interface, vnm, &sw_if_index))
;
@@ -1720,6 +1725,9 @@ classify_filter_command_fn (vlib_main_t * vm,
break;
}
+ if (sw_if_index == 0)
+ return clib_error_return (0, "Local interface not supported...");
+
if (is_add && mask == 0 && table_index == ~0)
return clib_error_return (0, "Mask required");
@@ -1729,18 +1737,25 @@ classify_filter_command_fn (vlib_main_t * vm,
if (is_add && match == ~0 && table_index == ~0)
return clib_error_return (0, "match count required");
- if (sw_if_index == ~0)
- return clib_error_return (0, "Must specify pcap or interface...");
+ if (sw_if_index == ~0 && pkt_trace == 0)
+ return clib_error_return (0, "Must specify trace, pcap or interface...");
+
+ if (pkt_trace && sw_if_index != ~0)
+ return clib_error_return (0, "Packet trace filter is per-system");
if (!is_add)
{
- u32 set_index = 0;
- if (sw_if_index < vec_len (cm->filter_set_by_sw_if_index))
+ if (pkt_trace)
+ set_index = vlib_global_main.trace_filter.trace_filter_set_index;
+ else if (sw_if_index < vec_len (cm->filter_set_by_sw_if_index))
set_index = cm->filter_set_by_sw_if_index[sw_if_index];
- if (set_index == 0)
+ if (set_index == ~0)
{
+ if (pkt_trace)
+ return clib_error_return (0,
+ "No pkt trace classify filter set...");
if (sw_if_index == 0)
return clib_error_return (0, "No pcap classify filter set...");
else
@@ -1759,27 +1774,36 @@ classify_filter_command_fn (vlib_main_t * vm,
table_index = set->table_indices[0];
vec_reset_length (set->table_indices);
pool_put (cm->filter_sets, set);
- cm->filter_set_by_sw_if_index[sw_if_index] = 0;
- if (sw_if_index > 0)
+ if (pkt_trace)
{
- vnet_hw_interface_t *hi =
- vnet_get_sup_hw_interface (vnm, sw_if_index);
- hi->trace_classify_table_index = ~0;
+ vlib_global_main.trace_filter.trace_filter_set_index = ~0;
+ vlib_global_main.trace_filter.trace_classify_table_index = ~0;
+ }
+ else
+ {
+ cm->filter_set_by_sw_if_index[sw_if_index] = ~0;
+ if (sw_if_index > 0)
+ {
+ vnet_hw_interface_t *hi =
+ vnet_get_sup_hw_interface (vnm, sw_if_index);
+ hi->trace_classify_table_index = ~0;
+ }
}
}
}
if (is_add)
{
- u32 set_index = 0;
-
- if (sw_if_index < vec_len (cm->filter_set_by_sw_if_index))
+ if (pkt_trace)
+ set_index = vlib_global_main.trace_filter.trace_filter_set_index;
+ else if (sw_if_index < vec_len (cm->filter_set_by_sw_if_index))
set_index = cm->filter_set_by_sw_if_index[sw_if_index];
/* Do we have a filter set for this intfc / pcap yet? */
- if (set_index == 0)
+ if (set_index == ~0)
{
pool_get (cm->filter_sets, set);
+ set_index = set - cm->filter_sets;
set->refcnt = 1;
}
else
@@ -1826,11 +1850,18 @@ classify_filter_command_fn (vlib_main_t * vm,
/* Remember the table */
vec_add1 (set->table_indices, table_index);
- vec_validate_init_empty (cm->filter_set_by_sw_if_index, sw_if_index, 0);
- cm->filter_set_by_sw_if_index[sw_if_index] = set - cm->filter_sets;
+
+ if (pkt_trace)
+ vlib_global_main.trace_filter.trace_filter_set_index = set_index;
+ else
+ {
+ vec_validate_init_empty (cm->filter_set_by_sw_if_index, sw_if_index,
+ ~0);
+ cm->filter_set_by_sw_if_index[sw_if_index] = set - cm->filter_sets;
+ }
/* Put top table index where device drivers can find them */
- if (sw_if_index > 0)
+ if (sw_if_index > 0 && pkt_trace == 0)
{
vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
ASSERT (vec_len (set->table_indices) > 0);
@@ -1877,10 +1908,34 @@ found_table:
return 0;
}
+/** Enable / disable packet trace filter */
+int
+vlib_enable_disable_pkt_trace_filter (int enable)
+{
+ if (enable)
+ {
+ vnet_classify_main_t *cm = &vnet_classify_main;
+ vnet_classify_filter_set_t *set;
+ u32 set_index = vlib_global_main.trace_filter.trace_filter_set_index;
+
+ if (set_index == ~0)
+ return -1;
+
+ set = pool_elt_at_index (cm->filter_sets, set_index);
+ vlib_global_main.trace_filter.trace_classify_table_index =
+ set->table_indices[0];
+ vlib_global_main.trace_filter.trace_filter_enable = 1;
+ }
+ else
+ {
+ vlib_global_main.trace_filter.trace_filter_enable = 0;
+ }
+ return 0;
+}
+
/*?
* Construct an arbitrary set of packet classifier tables for use with
- * "pcap rx | tx trace," and (eventually) with the vpp packet
- * tracer
+ * "pcap rx | tx trace," and with the vpp packet tracer
*
* Packets which match a rule in the classifier table chain
* will be traced. The tables are automatically ordered so that
@@ -1925,16 +1980,24 @@ found_table:
*
* Configure a simple classify filter, and configure pcap rx trace to use it:
*
- * <b><em>classify filter mask l3 ip4 src match l3 ip4 src 192.168.1.11"</em></b><br>
+ * <b><em>classify filter rx mask l3 ip4 src match l3 ip4 src 192.168.1.11"</em></b><br>
* <b><em>pcap rx trace on max 100 filter</em></b>
*
* Configure another fairly simple filter
*
* <b><em>classify filter mask l3 ip4 src dst match l3 ip4 src 192.168.1.10 dst 192.168.2.10"</em></b>
*
- * Clear all current classifier filters
*
- * <b><em>classify filter del</em></b>
+ * Configure a filter for use with the vpp packet tracer:
+ * <b><em>classify filter trace mask l3 ip4 src dst match l3 ip4 src 192.168.1.10 dst 192.168.2.10"</em></b>
+ * <b><em>trace add dpdk-input 100 filter</em></b>
+ *
+ * Clear classifier filters
+ *
+ * <b><em>classify filter [trace | rx | tx | <intfc>] del</em></b>
+ *
+ * To display the top-level classifier tables for each use case:
+ * <b><em>show classify filter</em/></b>
*
* To inspect the classifier tables, use
*
@@ -1947,8 +2010,9 @@ VLIB_CLI_COMMAND (classify_filter, static) =
{
.path = "classify filter",
.short_help =
- "classify filter <intfc> | pcap mask <mask-value> match <match-value> [del]"
- "[buckets <nn>] [memory-size <n>]",
+ "classify filter <intfc> | pcap mask <mask-value> match <match-value>\n"
+ " | trace mask <mask-value> match <match-value> [del]\n"
+ " [buckets <nn>] [memory-size <n>]",
.function = classify_filter_command_fn,
};
/* *INDENT-ON* */
@@ -1966,26 +2030,39 @@ show_classify_filter_command_fn (vlib_main_t * vm,
u32 set_index;
u32 table_index;
int verbose = 0;
- int i, j;
+ int i, j, limit;
(void) unformat (input, "verbose %=", &verbose, 1);
vlib_cli_output (vm, "%-30s%s", "Filter Used By", " Table(s)");
vlib_cli_output (vm, "%-30s%s", "--------------", " --------");
- for (i = 0; i < vec_len (cm->filter_set_by_sw_if_index); i++)
+ limit = vec_len (cm->filter_set_by_sw_if_index);
+
+ for (i = -1; i < limit; i++)
{
- set_index = cm->filter_set_by_sw_if_index[i];
+ if (i < 0)
+ set_index = vlib_global_main.trace_filter.trace_filter_set_index;
+ else
+ set_index = cm->filter_set_by_sw_if_index[i];
- if (set_index == 0 && verbose == 0)
+ if (set_index == ~0)
continue;
set = pool_elt_at_index (cm->filter_sets, set_index);
- if (i == 0)
- name = format (0, "pcap rx/tx/drop:");
- else
- name = format (0, "%U:", format_vnet_sw_if_index_name, vnm, i);
+ switch (i)
+ {
+ case -1:
+ name = format (0, "packet tracer:");
+ break;
+ case 0:
+ name = format (0, "pcap rx/tx/drop:");
+ break;
+ default:
+ name = format (0, "%U:", format_vnet_sw_if_index_name, vnm, i);
+ break;
+ }
if (verbose)
{
@@ -2875,12 +2952,22 @@ vnet_classify_init (vlib_main_t * vm)
set->table_indices[0] = ~0;
/* Initialize the pcap filter set */
vec_validate (cm->filter_set_by_sw_if_index, 0);
+ cm->filter_set_by_sw_if_index[0] = ~0;
+ /* Initialize the packet tracer filter set */
+ vlib_global_main.trace_filter.trace_filter_set_index = ~0;
return 0;
}
VLIB_INIT_FUNCTION (vnet_classify_init);
+int
+vnet_is_packet_traced (vlib_buffer_t * b, u32 classify_table_index, int func)
+{
+ return vnet_is_packet_traced_inline (b, classify_table_index, func);
+}
+
+
#define TEST_CODE 0
#if TEST_CODE > 0