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classify: fix classify filter trace del cli processing

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When a 'del' is used to delete a classify table, only the
mask is needed to locate the table.  Any match vector is
unneeded.  The tests failed to notice this, but if the
test is run by hand in vppctl, it issues a parse error.

Fix the test so that it doesn't supply irrelevant data.
Fix the CLI processing to read always complete newline
terminated line of input instead.  This allows unneeded
CLI parameters to be ignored.  It also necessitated
fixing a trace test which had then erroneously split
a single CLI command over multiple lines.

While in the area, fix a latent bug on table matching
where a test for compatible mask vector sizes were
not matching impedance properly (byte vs ux32x4).

Type: fix
Signed-off-by: Jon Loeliger <jdl@netgate.com>
Change-Id: I1177ab1dd417f3d11f30eecbaa2b0fb1015c3ab5
This commit is contained in:
Jon Loeliger
2020-11-03 15:49:10 -05:00
committed by Dave Barach
parent 212ec2af92
commit 5f7f47ec7a
3 changed files with 54 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
src/vnet/classify/vnet_classify.c
View File

@ -1699,27 +1699,34 @@ classify_filter_command_fn (vlib_main_t * vm,
int rv = 0;
vnet_classify_filter_set_t *set = 0;
u32 set_index = ~0;
clib_error_t *err = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
unformat_input_t _line_input, *line_input = &_line_input;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "del"))
if (unformat (line_input, "del"))
is_add = 0;
else if (unformat (input, "pcap %=", &pcap, 1))
else if (unformat (line_input, "pcap %=", &pcap, 1))
sw_if_index = 0;
else if (unformat (input, "trace"))
else if (unformat (line_input, "trace"))
pkt_trace = 1;
else if (unformat (input, "%U",
else if (unformat (line_input, "%U",
unformat_vnet_sw_interface, vnm, &sw_if_index))
{
if (sw_if_index == 0)
return clib_error_return (0, "Local interface not supported...");
}
else if (unformat (input, "buckets %d", &nbuckets))
else if (unformat (line_input, "buckets %d", &nbuckets))
;
else if (unformat (input, "mask %U", unformat_classify_mask,
else if (unformat (line_input, "mask %U", unformat_classify_mask,
&mask, &skip, &match))
;
else if (unformat (input, "memory-size %U", unformat_memory_size,
else if (unformat (line_input, "memory-size %U", unformat_memory_size,
&memory_size))
;
else
@ -1727,27 +1734,32 @@ classify_filter_command_fn (vlib_main_t * vm,
}
if (is_add && mask == 0 && table_index == ~0)
return clib_error_return (0, "Mask required");
err = clib_error_return (0, "Mask required");
if (is_add && skip == ~0 && table_index == ~0)
return clib_error_return (0, "skip count required");
else if (is_add && skip == ~0 && table_index == ~0)
err = clib_error_return (0, "skip count required");
if (is_add && match == ~0 && table_index == ~0)
return clib_error_return (0, "match count required");
else if (is_add && match == ~0 && table_index == ~0)
err = clib_error_return (0, "match count required");
if (sw_if_index == ~0 && pkt_trace == 0 && pcap == 0)
return clib_error_return (0, "Must specify trace, pcap or interface...");
else if (sw_if_index == ~0 && pkt_trace == 0 && pcap == 0)
err = clib_error_return (0, "Must specify trace, pcap or interface...");
if (pkt_trace && pcap)
return clib_error_return
else if (pkt_trace && pcap)
err = clib_error_return
(0, "Packet trace and pcap are mutually exclusive...");
if (pkt_trace && sw_if_index != ~0)
return clib_error_return (0, "Packet trace filter is per-system");
else if (pkt_trace && sw_if_index != ~0)
err = clib_error_return (0, "Packet trace filter is per-system");
if (err)
{
unformat_free (line_input);
return err;
}
if (!is_add)
{
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))
@ -1756,14 +1768,16 @@ classify_filter_command_fn (vlib_main_t * vm,
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...");
err =
clib_error_return (0, "No pkt trace classify filter set...");
else if (sw_if_index == 0)
err = clib_error_return (0, "No pcap classify filter set...");
else
return clib_error_return (0, "No classify filter set for %U...",
format_vnet_sw_if_index_name, vnm,
sw_if_index);
err = clib_error_return (0, "No classify filter set for %U...",
format_vnet_sw_if_index_name, vnm,
sw_if_index);
unformat_free (line_input);
return err;
}
set = pool_elt_at_index (cm->filter_sets, set_index);
@ -1820,7 +1834,7 @@ classify_filter_command_fn (vlib_main_t * vm,
if (t->match_n_vectors != match || t->skip_n_vectors != skip)
continue;
/* Masks aren't congruent, can't use this table */
if (vec_len (t->mask) != vec_len (mask))
if (vec_len (t->mask) * sizeof (u32x4) != vec_len (mask))
continue;
/* Masks aren't bit-for-bit identical, can't use this table */
if (memcmp (t->mask, mask, vec_len (mask)))
@ -1839,18 +1853,18 @@ classify_filter_command_fn (vlib_main_t * vm,
is_add, del_chain);
vec_free (mask);
switch (rv)
if (rv != 0)
{
case 0:
break;
default:
unformat_free (line_input);
return clib_error_return (0, "vnet_classify_add_del_table returned %d",
rv);
}
if (is_add == 0)
return 0;
{
unformat_free (line_input);
return 0;
}
/* Remember the table */
vec_add1 (set->table_indices, table_index);
@ -1889,7 +1903,7 @@ classify_filter_command_fn (vlib_main_t * vm,
found_table:
/* Now try to parse a session */
if (unformat (input, "match %U", unformat_classify_match,
if (unformat (line_input, "match %U", unformat_classify_match,
cm, &match_vector, table_index) == 0)
return 0;

3
test/test_pcap.py
View File

@ -67,8 +67,7 @@ class TestPcap(VppTestCase):
"show cla t",
"pa en",
"pcap trace rx tx off",
"classify filter pcap del mask l3 ip4 src "
"match l3 ip4 src 11.22.33.44"]
"classify filter pcap del mask l3 ip4 src"]
for cmd in cmds:
r = self.vapi.cli_return_response(cmd)

9
test/test_trace_filter.py
View File

@ -71,7 +71,7 @@ class TestTracefilter(VppTestCase):
" incrementing 286\n"
" }\n"
"}\n",
"classify filter trace mask l3 ip4 src\n"
"classify filter trace mask l3 ip4 src"
" match l3 ip4 src 192.168.1.15",
"trace add pg-input 100 filter",
"pa en classifyme"]
@ -84,8 +84,7 @@ class TestTracefilter(VppTestCase):
# cleanup
self.cli("pa de classifyme")
self.cli("classify filter trace del mask l3 ip4 src "
"match l3 ip4 src 192.168.1.15")
self.cli("classify filter trace del mask l3 ip4 src")
# install a classify rule, inject traffic and check for hits
def assert_classify(self, mask, match, packets, n=None):
@ -100,8 +99,8 @@ class TestTracefilter(VppTestCase):
self.assert_hits(n if n is not None else len(packets))
self.cli("clear trace")
self.cli(
"classify filter trace del mask hex %s match hex %s" %
(mask, match))
"classify filter trace del mask hex %s" %
(mask))
def test_encap(self):
""" Packet Tracer Filter Test with encap """