On Fri, Dec 8, 2017 at 12:55 PM, Jon Loeliger <[email protected]> wrote:
>
>
>
>> We need to iterate the am->macip_acl_by_sw_if_index and for interfaces
>> which have the acl in question applied, reapply these new tables to these
>> interfaces so the already active macip acl remained active.
>>
>
> Ah, I see....
>
I'm not convinced this is the issue. I added that loop, and it doesn't
change things. Specifically, a->ip4_table_index is 0, not 3 after the
creation of the classify tables.
So, here is sort of a trace through some key places of the
classify table construction. It follows the API sequence I
outlined in an earlier message (create MACIP with one permit rule,
then bind to interface, then modify that MACIP's rule to deny
and update it using macip_acl_add_replace).
I'll annotate this some.
Here is the initial creation of the classify tables:
macip_acl_add_list: looks like a create
macip_create_classify_tables: top a->count 1
macip_create_classify_tables: last_table before 4294967295
Now we create the rules in reverse order:
macip_create_classify_tables: ARP looop top
macip_create_classify_tables: ARP loop last_table 0
macip_create_classify_tables: IP[46] loop top
macip_create_classify_tables: IP[46] loop last_table 1
macip_create_classify_tables: IP[46] loop last_table 2
macip_create_classify_tables: IP[46] loop last_table 3
macip_create_classify_tables: ip4_t_i 3
macip_create_classify_tables: ip6_t_i 3
macip_create_classify_tables: l2_t_i 3
That leaves last_table at 3, the most recently created rule,
with a chain from 0 through 3:
vpp# show classify tables
TableIdx Sessions NextTbl NextNode
0 1 1 -1
Heap: 3 objects, 204 of 2k used, 76 free, 0 reclaimed, 1k overhead, 8188k
capacity
nbuckets 32, skip 0 match 2 flag 0 offset 0
mask 000000000000000000000000ffff000000000000000000000000000000000000
linear-search buckets 0
1 1 2 -1
Heap: 3 objects, 204 of 2k used, 76 free, 0 reclaimed, 1k overhead, 8188k
capacity
nbuckets 32, skip 0 match 2 flag 0 offset 0
mask 000000000000000000000000ffff0000ffff0000000000000000000000000000
linear-search buckets 0
2 1 3 -1
Heap: 3 objects, 236 of 2k used, 76 free, 0 reclaimed, 1k overhead, 8188k
capacity
nbuckets 32, skip 0 match 3 flag 0 offset 0
mask 00000000:
000000000000000000000000ffff0000ffff0000ffff00000000000000000000
00000020: 00000000000000000000000000000000
linear-search buckets 0
3 1 -1 0
Heap: 3 objects, 204 of 2k used, 76 free, 0 reclaimed, 1k overhead, 8188k
capacity
nbuckets 32, skip 0 match 2 flag 0 offset 0
mask 000000000000000000000000ffff000000000000000000000000000000000000
Now I bind that MACIP to the interface, and get:
vpp# show acl-plugin macip interface
sw_if_index 0: -1
sw_if_index 1: 0
vpp# show acl-plugin macip acl
MACIP acl_index: 0, count: 1 (true len 1) tag {bob} is free pool slot: 0
ip4_table_index 3, ip6_table_index 3, l2_table_index 3
rule 0: ipv4 action 1 ip 0.0.0.0/0 mac 00:00:00:00:00:00 mask
00:00:00:00:00:00
Now I update the MACIP rule, changing "permit" to "deny".
And I call macip_acl_add_replace():
macip_acl_add_list: replacing ACLs now, acl_list_index is 0
macip_acl_interface_add_acl: macip_acl_index 0
macip_acl_add_list: looks like a replace
macip_create_classify_tables: top a->count 1
macip_create_classify_tables: last_table before 4294967295
That's just like before. Good.
And now we count down the existing matching rules:
macip_create_classify_tables: ARP looop top
macip_create_classify_tables: ARP loop last_table 3
macip_create_classify_tables: IP[46] loop top
macip_create_classify_tables: IP[46] loop last_table 2
macip_create_classify_tables: IP[46] loop last_table 1
macip_create_classify_tables: IP[46] loop last_table 0
And leave last_table at 0.
Which we then store in the {ip4,ip6,l2}_table_index variables:
macip_create_classify_tables: ip4_t_i 0
macip_create_classify_tables: ip6_t_i 0
macip_create_classify_tables: l2_t_i 0
This is my loop added to the bottom of macip_acl_add_list():
for (i = 0; i < vec_len (am->macip_acl_by_sw_if_index); i++)
{
vlib_cli_output (vm, "%s: check swif %d\n", __func__, i);
if (am->macip_acl_by_sw_if_index[i] == *acl_list_index)
{
vlib_cli_output (vm, "%s: re-add acl_list_index %d\n", __func__,
*acl\
_list_index);
macip_acl_interface_add_acl (am, i, *acl_list_index);
}
}
macip_acl_add_list: replacing ACLs now, acl_list_index is 0
macip_acl_add_list: check swif 0
macip_acl_add_list: check swif 1
macip_acl_add_list: re-add acl_list_index 0
macip_acl_interface_add_acl: macip_acl_index 0
So the MACIP ACL is applied to the SW IF, I believe, but
the MACIP ACL itself appears to be pointing to the wrong
end of the classify table chain in either the "create" case,
or in the "replace" case. But I think they should be the same.
HTH,
jdl
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