diff options
| author | Feng | 2017-01-20 21:40:43 +0800 |
|---|---|---|
| committer | Pablo Neira Ayuso | 2017-02-02 14:30:19 +0100 |
| commit | 10435c1192d06bdb0bac7666452d8219d7e7c477 (patch) | |
| tree | 93b76419142fe17b1d162d062c663297a3e8a965 /net | |
| parent | 1a28ad74ebd8f9d3c7eae0d781f72a6d30545e17 (diff) | |
netfilter: nf_tables: Eliminate duplicated code in nf_tables_table_enable()
If something fails in nf_tables_table_enable(), it unregisters the
chains. But the rollback code is the same as nf_tables_table_disable()
almostly, except there is one counter check. Now create one wrapper
function to eliminate the duplicated codes.
Signed-off-by: Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 6e07c214c208..e6741ac4ccc1 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -576,6 +576,28 @@ err: return err; } +static void _nf_tables_table_disable(struct net *net, + const struct nft_af_info *afi, + struct nft_table *table, + u32 cnt) +{ + struct nft_chain *chain; + u32 i = 0; + + list_for_each_entry(chain, &table->chains, list) { + if (!nft_is_active_next(net, chain)) + continue; + if (!(chain->flags & NFT_BASE_CHAIN)) + continue; + + if (cnt && i++ == cnt) + break; + + nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, + afi->nops); + } +} + static int nf_tables_table_enable(struct net *net, const struct nft_af_info *afi, struct nft_table *table) @@ -598,18 +620,8 @@ static int nf_tables_table_enable(struct net *net, } return 0; err: - list_for_each_entry(chain, &table->chains, list) { - if (!nft_is_active_next(net, chain)) - continue; - if (!(chain->flags & NFT_BASE_CHAIN)) - continue; - - if (i-- <= 0) - break; - - nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, - afi->nops); - } + if (i) + _nf_tables_table_disable(net, afi, table, i); return err; } @@ -617,17 +629,7 @@ static void nf_tables_table_disable(struct net *net, const struct nft_af_info *afi, struct nft_table *table) { - struct nft_chain *chain; - - list_for_each_entry(chain, &table->chains, list) { - if (!nft_is_active_next(net, chain)) - continue; - if (!(chain->flags & NFT_BASE_CHAIN)) - continue; - - nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, - afi->nops); - } + _nf_tables_table_disable(net, afi, table, 0); } static int nf_tables_updtable(struct nft_ctx *ctx) |