Seems like your code is OK, see also vnet_interface_features_show(...) in
.../src/vnet/feature/feature.c.
We could add per-interface, per-feature arc "feature X is enabled" bitmaps to
speed up this sort of processing, but there has to be a compelling reason to do
so.
What problem are you trying to solve?
Thanks... Dave
-----Original Message-----
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Raj
Sent: Friday, June 28, 2019 9:00 AM
To: vpp-dev <vpp-dev@lists.fd.io>
Subject: [vpp-dev] Checking for enabled feature
Hello all,
I am in need to find out whether a particular feature is enabled on an
interface during run time.
So if I understand correctly we have to get the corresponding 'feature arc
index '. Then get the config index by using 'config_index_by_sw_if_index' then
get the config_pool and then iterate through the features list to check whether
the given feature is there or not.
What I would like to know, is this is the correct approach or is there any
optimized and a better performing alternative for achieving the same
current_config_index =
vec_elt (cm[feature_arc].config_index_by_sw_if_index, sw_if_index);
cfg_index = vcm->config_pool_index_by_user_index[current_config_index];
cfg = pool_elt_at_index (vcm->config_pool, cfg_index);
for (i = 0; i < vec_len (cfg->features); i++)
{
feat = cfg->features + i;
node_index = feat->node_index;
n = vlib_get_node (vm, node_index);
if (0 == memcmp (n->name, input_feat,
sizeof("ip4-policer-classify") - 1))
return 1;
}
Thanks and Regards,
Raj
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