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odp-util: Return exact mask if netlink mask attribute is missing.

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In the ODP context an empty mask netlink attribute usually means that
the flow should be an exact match.

odp_flow_key_to_mask{,_udpif}() instead return a struct flow_wildcards
with matches only on recirc_id and vlan_tci.

A more appropriate behavior is to handle a missing (zero length) netlink
mask specially (like we do in userspace and Linux datapath) and create
an exact match flow_wildcards from the original flow.

This fixes a bug in revalidate_ukey(): every flow created with
megaflows disabled would be revalidated away, because the mask would
seem too generic. (Another possible fix would be to handle the special
case of a missing mask in revalidate_ukey(), but this seems a more
generic solution).
This commit is contained in:
Daniele Di Proietto
2015-12-07 17:30:25 -08:00
parent efa6665e4d
commit ca8d344271
6 changed files with 53 additions and 34 deletions
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4
lib/odp-util.h
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@@ -240,7 +240,7 @@ enum odp_key_fitness odp_flow_key_to_mask(const struct nlattr *mask_key,
size_t mask_key_len,
const struct nlattr *flow_key,
size_t flow_key_len,
struct flow *mask,
struct flow_wildcards *mask,
const struct flow *flow);
enum odp_key_fitness odp_flow_key_to_flow_udpif(const struct nlattr *, size_t,
@@ -249,7 +249,7 @@ enum odp_key_fitness odp_flow_key_to_mask_udpif(const struct nlattr *mask_key,
size_t mask_key_len,
const struct nlattr *flow_key,
size_t flow_key_len,
struct flow *mask,
struct flow_wildcards *mask,
const struct flow *flow);
const char *odp_key_fitness_to_string(enum odp_key_fitness);