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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-05-31 18:04:11 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-08-07 11:49:49 +0200 |
| commit | d877f07112f1e5a247c6b585c971a93895c9f738 (patch) | |
| tree | 6ff7fa3d31b94ef6cbe88284d63f93bdab8a35fb /include | |
| parent | netfilter: factor out packet duplication for IPv4/IPv6 (diff) | |
| download | linux-d877f07112f1e5a247c6b585c971a93895c9f738.tar.xz linux-d877f07112f1e5a247c6b585c971a93895c9f738.zip | |
netfilter: nf_tables: add nft_dup expression
This new expression uses the nf_dup engine to clone packets to a given gateway.
Unlike xt_TEE, we use an index to indicate output interface which should be
fine at this stage.
Moreover, change to the preemtion-safe this_cpu_read(nf_skb_duplicated) from
nf_dup_ipv{4,6} to silence a lockdep splat.
Based on the original tee expression from Arturo Borrero Gonzalez, although
this patch has diverted quite a bit from this initial effort due to the
change to support maps.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/netfilter/nft_dup.h | 9 | ||||
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 14 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/net/netfilter/nft_dup.h b/include/net/netfilter/nft_dup.h new file mode 100644 index 000000000000..6b84cf6491a2 --- /dev/null +++ b/include/net/netfilter/nft_dup.h @@ -0,0 +1,9 @@ +#ifndef _NFT_DUP_H_ +#define _NFT_DUP_H_ + +struct nft_dup_inet { + enum nft_registers sreg_addr:8; + enum nft_registers sreg_dev:8; +}; + +#endif /* _NFT_DUP_H_ */ diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index a99e6a997140..2ef35f2c9bda 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -936,6 +936,20 @@ enum nft_redir_attributes { #define NFTA_REDIR_MAX (__NFTA_REDIR_MAX - 1) /** + * enum nft_dup_attributes - nf_tables dup expression netlink attributes + * + * @NFTA_DUP_SREG_ADDR: source register of address (NLA_U32: nft_registers) + * @NFTA_DUP_SREG_DEV: source register of output interface (NLA_U32: nft_register) + */ +enum nft_dup_attributes { + NFTA_DUP_UNSPEC, + NFTA_DUP_SREG_ADDR, + NFTA_DUP_SREG_DEV, + __NFTA_DUP_MAX +}; +#define NFTA_DUP_MAX (__NFTA_DUP_MAX - 1) + +/** * enum nft_gen_attributes - nf_tables ruleset generation attributes * * @NFTA_GEN_ID: Ruleset generation ID (NLA_U32) |