[ovs-dev] [PATCH v4 6/9] classifier: Do not use mf_value.

Jarno Rajahalme jrajahalme at nicira.com
Wed Aug 12 23:48:55 UTC 2015


> On Aug 12, 2015, at 2:18 PM, Joe Stringer <joestringer at nicira.com> wrote:
> 
> On 7 August 2015 at 16:57, Jarno Rajahalme <jrajahalme at nicira.com <mailto:jrajahalme at nicira.com>> wrote:
>> mf_value has grown bigger than needed for storing the biggest
>> supported prefix (IPv6 address length).  Define a new type to be used
>> instead of mf_value.
>> 
>> This makes classifier lookups a bit faster.
>> 
>> Signed-off-by: Jarno Rajahalme <jrajahalme at nicira.com>
>> ---
>> lib/classifier.c | 14 ++++++++++----
>> 1 file changed, 10 insertions(+), 4 deletions(-)
>> 
>> diff --git a/lib/classifier.c b/lib/classifier.c
>> index 4adee2d..040d04f 100644
>> --- a/lib/classifier.c
>> +++ b/lib/classifier.c
>> @@ -138,12 +138,18 @@ next_visible_rule_in_list(const struct cls_match *rule, cls_version_t version)
>>     return rule;
>> }
>> 
>> +/* Type with maximum supported prefix length. */
>> +typedef union {
>> +    struct in6_addr ipv6;  /* For sizing. */
>> +    ovs_be32 be32;         /* For access. */
>> +} trie_prefix_t;
> 
> Typically I believe that we try to avoid typedefs, instead using the
> expanded "union trie_prefix" so that the actual type can be determined
> at a glance (See CodingStyle.md for more explanation).
> 

OK, changed to “union trie_prefix”.

> Other than that, this change seems to make sense.

Is this an Acked-by?

  Jarno




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