diff options
| author |   Jose M. Guisado Gomez <guigom@riseup.net> | 2020-08-20 10:19:01 +0200 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2020-08-28 19:18:48 +0200 |
| commit | 7a81575b806e5dab214025e6757362c62d946405 (patch) | |
| tree | 57f70a2356b71c822284700df21efccc77211836 /net/netfilter | |
| parent | ipvs: Fix uninit-value in do_ip_vs_set_ctl() (diff) | |
| download | linux-dev-7a81575b806e5dab214025e6757362c62d946405.tar.xz linux-dev-7a81575b806e5dab214025e6757362c62d946405.zip | |
netfilter: nf_tables: add userdata attributes to nft_table
Enables storing userdata for nft_table. Field udata points to user data
and udlen store its length.
Adds new attribute flag NFTA_TABLE_USERDATA
Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index fd814e514f94..6ccce2a2e715 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -650,6 +650,8 @@ static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = { .len = NFT_TABLE_MAXNAMELEN - 1 }, [NFTA_TABLE_FLAGS] = { .type = NLA_U32 }, [NFTA_TABLE_HANDLE] = { .type = NLA_U64 }, + [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY, + .len = NFT_USERDATA_MAXLEN } }; static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, @@ -676,6 +678,11 @@ static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, NFTA_TABLE_PAD)) goto nla_put_failure; + if (table->udata) { + if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata)) + goto nla_put_failure; + } + nlmsg_end(skb, nlh); return 0; @@ -977,8 +984,9 @@ static int nf_tables_newtable(struct net *net, struct sock *nlsk, int family = nfmsg->nfgen_family; const struct nlattr *attr; struct nft_table *table; - u32 flags = 0; struct nft_ctx ctx; + u32 flags = 0; + u16 udlen = 0; int err; lockdep_assert_held(&net->nft.commit_mutex); @@ -1014,6 +1022,16 @@ static int nf_tables_newtable(struct net *net, struct sock *nlsk, if (table->name == NULL) goto err_strdup; + if (nla[NFTA_TABLE_USERDATA]) { + udlen = nla_len(nla[NFTA_TABLE_USERDATA]); + table->udata = kzalloc(udlen, GFP_KERNEL); + if (table->udata == NULL) + goto err_table_udata; + + nla_memcpy(table->udata, nla[NFTA_TABLE_USERDATA], udlen); + table->udlen = udlen; + } + err = rhltable_init(&table->chains_ht, &nft_chain_ht_params); if (err) goto err_chain_ht; @@ -1036,6 +1054,8 @@ static int nf_tables_newtable(struct net *net, struct sock *nlsk, err_trans: rhltable_destroy(&table->chains_ht); err_chain_ht: + kfree(table->udata); +err_table_udata: kfree(table->name); err_strdup: kfree(table); |