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| author |   Josh Hunt <johunt@akamai.com> | 2014-02-28 22:14:57 -0500 |
|---|---|---|
| committer |   Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2014-03-06 09:31:43 +0100 |
| commit | 07cf8f5ae2657ac495b906c68ff3441ff8ba80ba (patch) | |
| tree | 1492748285640e3445dfc7c0287836a84db60ffe /include/linux/netfilter/ipset | |
| parent | netfilter: ipset: move registration message to init from net_init (diff) | |
| download | wireguard-linux-07cf8f5ae2657ac495b906c68ff3441ff8ba80ba.tar.xz wireguard-linux-07cf8f5ae2657ac495b906c68ff3441ff8ba80ba.zip | |
netfilter: ipset: add forceadd kernel support for hash set types
Adds a new property for hash set types, where if a set is created
with the 'forceadd' option and the set becomes full the next addition
to the set may succeed and evict a random entry from the set.
To keep overhead low eviction is done very simply. It checks to see
which bucket the new entry would be added. If the bucket's pos value
is non-zero (meaning there's at least one entry in the bucket) it
replaces the first entry in the bucket. If pos is zero, then it continues
down the normal add process.
This property is useful if you have a set for 'ban' lists where it may
not matter if you release some entries from the set early.
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Diffstat (limited to 'include/linux/netfilter/ipset')
| -rw-r--r-- | include/linux/netfilter/ipset/ip_set.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h index f476bcec25ea..96afc29184be 100644 --- a/include/linux/netfilter/ipset/ip_set.h +++ b/include/linux/netfilter/ipset/ip_set.h @@ -65,6 +65,7 @@ enum ip_set_extension { #define SET_WITH_TIMEOUT(s) ((s)->extensions & IPSET_EXT_TIMEOUT) #define SET_WITH_COUNTER(s) ((s)->extensions & IPSET_EXT_COUNTER) #define SET_WITH_COMMENT(s) ((s)->extensions & IPSET_EXT_COMMENT) +#define SET_WITH_FORCEADD(s) ((s)->flags & IPSET_CREATE_FLAG_FORCEADD) /* Extension id, in size order */ enum ip_set_ext_id { @@ -255,6 +256,8 @@ ip_set_put_flags(struct sk_buff *skb, struct ip_set *set) cadt_flags |= IPSET_FLAG_WITH_COUNTERS; if (SET_WITH_COMMENT(set)) cadt_flags |= IPSET_FLAG_WITH_COMMENT; + if (SET_WITH_FORCEADD(set)) + cadt_flags |= IPSET_FLAG_WITH_FORCEADD; if (!cadt_flags) return 0; |