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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-08-17 23:46:06 (GMT) |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-08-22 09:42:18 (GMT) |
| commit | 3d2f30a1df907e3ef4175121f0d21456630a72aa (patch) | |
| tree | 2b6b9df712759bfc4894fa679109a2d5d01a0629 /include | |
| parent | 2567c4eae1f31492b0f547409e035b9b0501326f (diff) | |
| download | linux-3d2f30a1df907e3ef4175121f0d21456630a72aa.tar.xz | |
netfilter: nf_tables: add quota expression
This patch adds the quota expression. This new stateful expression
integrate easily into the dynset expression to build 'hashquota' flow
tables.
Arguably, we could use instead "counter bytes > 1000" instead, but this
approach has several problems:
1) We only support for one single stateful expression in dynamic set
definitions, and the expression above is a composite of two
expressions: get counter + comparison.
2) We would need to restore the packed counter representation (that we
used to have) based on seqlock to synchronize this, since per-cpu is
not suitable for this.
So instead of bloating the counter expression back with the seqlock
representation and extending the existing set infrastructure to make it
more complex for the composite described above, let's follow the more
simple approach of adding a quota expression that we can plug into our
existing infrastructure.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 6ce0a6d..784fbf1 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -900,6 +900,25 @@ enum nft_queue_attributes { #define NFT_QUEUE_FLAG_CPU_FANOUT 0x02 /* use current CPU (no hashing) */ #define NFT_QUEUE_FLAG_MASK 0x03 +enum nft_quota_flags { + NFT_QUOTA_F_INV = (1 << 0), +}; + +/** + * enum nft_quota_attributes - nf_tables quota expression netlink attributes + * + * @NFTA_QUOTA_BYTES: quota in bytes (NLA_U16) + * @NFTA_QUOTA_FLAGS: flags (NLA_U32) + */ +enum nft_quota_attributes { + NFTA_QUOTA_UNSPEC, + NFTA_QUOTA_BYTES, + NFTA_QUOTA_FLAGS, + NFTA_QUOTA_PAD, + __NFTA_QUOTA_MAX +}; +#define NFTA_QUOTA_MAX (__NFTA_QUOTA_MAX - 1) + /** * enum nft_reject_types - nf_tables reject expression reject types * |