From e6d8ecac9e68265aee9be711c5bd29406129666f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Carlos=20Falgueras=20Garc=C3=ADa?= Date: Tue, 5 Jan 2016 14:03:32 +0100 Subject: netfilter: nf_tables: Add new attributes into nft_set to store user data. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit User data is stored at after 'nft_set_ops' private data into 'data[]' flexible array. The field 'udata' points to user data and 'udlen' stores its length. Add new flag NFTA_SET_USERDATA. Signed-off-by: Carlos Falgueras GarcĂ­a Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'net/netfilter') diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index f5c397158e29..2011977cd79d 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -2323,6 +2323,8 @@ static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = { [NFTA_SET_ID] = { .type = NLA_U32 }, [NFTA_SET_TIMEOUT] = { .type = NLA_U64 }, [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 }, + [NFTA_SET_USERDATA] = { .type = NLA_BINARY, + .len = NFT_USERDATA_MAXLEN }, }; static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = { @@ -2482,6 +2484,9 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, goto nla_put_failure; } + if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata)) + goto nla_put_failure; + desc = nla_nest_start(skb, NFTA_SET_DESC); if (desc == NULL) goto nla_put_failure; @@ -2691,6 +2696,8 @@ static int nf_tables_newset(struct net *net, struct sock *nlsk, u64 timeout; u32 ktype, dtype, flags, policy, gc_int; struct nft_set_desc desc; + unsigned char *udata; + u16 udlen; int err; if (nla[NFTA_SET_TABLE] == NULL || @@ -2803,12 +2810,16 @@ static int nf_tables_newset(struct net *net, struct sock *nlsk, if (IS_ERR(ops)) return PTR_ERR(ops); + udlen = 0; + if (nla[NFTA_SET_USERDATA]) + udlen = nla_len(nla[NFTA_SET_USERDATA]); + size = 0; if (ops->privsize != NULL) size = ops->privsize(nla); err = -ENOMEM; - set = kzalloc(sizeof(*set) + size, GFP_KERNEL); + set = kzalloc(sizeof(*set) + size + udlen, GFP_KERNEL); if (set == NULL) goto err1; @@ -2817,6 +2828,12 @@ static int nf_tables_newset(struct net *net, struct sock *nlsk, if (err < 0) goto err2; + udata = NULL; + if (udlen) { + udata = set->data + size; + nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen); + } + INIT_LIST_HEAD(&set->bindings); write_pnet(&set->pnet, net); set->ops = ops; @@ -2827,6 +2844,8 @@ static int nf_tables_newset(struct net *net, struct sock *nlsk, set->flags = flags; set->size = desc.size; set->policy = policy; + set->udlen = udlen; + set->udata = udata; set->timeout = timeout; set->gc_int = gc_int; -- cgit v1.2.3