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netfilter: nf_tables: add nft_is_base_chain() helper

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This new helper function allows us to check if this is a basechain.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2017-03-20 18:10:29 +01:00
parent 6f14f443d3
commit f323d95469
4 changed files with 27 additions and 21 deletions
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5
include/net/netfilter/nf_tables.h
View File

@ -911,6 +911,11 @@ static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chai
return container_of(chain, struct nft_base_chain, chain);
}
static inline bool nft_is_base_chain(const struct nft_chain *chain)
{
return chain->flags & NFT_BASE_CHAIN;
}
int __nft_release_basechain(struct nft_ctx *ctx);
unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv);

30
net/netfilter/nf_tables_api.c
View File

@ -144,7 +144,7 @@ static int nf_tables_register_hooks(struct net *net,
unsigned int hook_nops)
{
if (table->flags & NFT_TABLE_F_DORMANT ||
!(chain->flags & NFT_BASE_CHAIN))
!nft_is_base_chain(chain))
return 0;
return nf_register_net_hooks(net, nft_base_chain(chain)->ops,
@ -157,7 +157,7 @@ static void nf_tables_unregister_hooks(struct net *net,
unsigned int hook_nops)
{
if (table->flags & NFT_TABLE_F_DORMANT ||
!(chain->flags & NFT_BASE_CHAIN))
!nft_is_base_chain(chain))
return;
nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, hook_nops);
@ -587,7 +587,7 @@ static void _nf_tables_table_disable(struct net *net,
list_for_each_entry(chain, &table->chains, list) {
if (!nft_is_active_next(net, chain))
continue;
if (!(chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(chain))
continue;
if (cnt && i++ == cnt)
@ -608,7 +608,7 @@ static int nf_tables_table_enable(struct net *net,
list_for_each_entry(chain, &table->chains, list) {
if (!nft_is_active_next(net, chain))
continue;
if (!(chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(chain))
continue;
err = nf_register_net_hooks(net, nft_base_chain(chain)->ops,
@ -1007,7 +1007,7 @@ static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name))
goto nla_put_failure;
if (chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(chain)) {
const struct nft_base_chain *basechain = nft_base_chain(chain);
const struct nf_hook_ops *ops = &basechain->ops[0];
struct nlattr *nest;
@ -1226,7 +1226,7 @@ static void nf_tables_chain_destroy(struct nft_chain *chain)
{
BUG_ON(chain->use > 0);
if (chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(chain)) {
struct nft_base_chain *basechain = nft_base_chain(chain);
module_put(basechain->type->owner);
@ -1364,8 +1364,8 @@ static int nf_tables_newchain(struct net *net, struct sock *nlsk,
}
if (nla[NFTA_CHAIN_POLICY]) {
if ((chain != NULL &&
!(chain->flags & NFT_BASE_CHAIN)))
if (chain != NULL &&
!nft_is_base_chain(chain))
return -EOPNOTSUPP;
if (chain == NULL &&
@ -1396,7 +1396,7 @@ static int nf_tables_newchain(struct net *net, struct sock *nlsk,
struct nft_chain_hook hook;
struct nf_hook_ops *ops;
if (!(chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(chain))
return -EBUSY;
err = nft_chain_parse_hook(net, nla, afi, &hook,
@ -1433,7 +1433,7 @@ static int nf_tables_newchain(struct net *net, struct sock *nlsk,
}
if (nla[NFTA_CHAIN_COUNTERS]) {
if (!(chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(chain))
return -EOPNOTSUPP;
stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
@ -4708,7 +4708,7 @@ static void nft_chain_commit_update(struct nft_trans *trans)
if (nft_trans_chain_name(trans)[0])
strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans));
if (!(trans->ctx.chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(trans->ctx.chain))
return;
basechain = nft_base_chain(trans->ctx.chain);
@ -5022,7 +5022,7 @@ int nft_chain_validate_dependency(const struct nft_chain *chain,
{
const struct nft_base_chain *basechain;
if (chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(chain)) {
basechain = nft_base_chain(chain);
if (basechain->type->type != type)
return -EOPNOTSUPP;
@ -5036,7 +5036,7 @@ int nft_chain_validate_hooks(const struct nft_chain *chain,
{
struct nft_base_chain *basechain;
if (chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(chain)) {
basechain = nft_base_chain(chain);
if ((1 << basechain->ops[0].hooknum) & hook_flags)
@ -5345,7 +5345,7 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
tb[NFTA_VERDICT_CHAIN], genmask);
if (IS_ERR(chain))
return PTR_ERR(chain);
if (chain->flags & NFT_BASE_CHAIN)
if (nft_is_base_chain(chain))
return -EOPNOTSUPP;
chain->use++;
@ -5518,7 +5518,7 @@ int __nft_release_basechain(struct nft_ctx *ctx)
{
struct nft_rule *rule, *nr;
BUG_ON(!(ctx->chain->flags & NFT_BASE_CHAIN));
BUG_ON(!nft_is_base_chain(ctx->chain));
nf_tables_unregister_hooks(ctx->net, ctx->chain->table, ctx->chain,
ctx->afi->nops);

2
net/netfilter/nf_tables_netdev.c
View File

@ -128,7 +128,7 @@ static int nf_tables_netdev_event(struct notifier_block *this,
list_for_each_entry(table, &afi->tables, list) {
ctx.table = table;
list_for_each_entry_safe(chain, nr, &table->chains, list) {
if (!(chain->flags & NFT_BASE_CHAIN))
if (!nft_is_base_chain(chain))
continue;
ctx.chain = chain;

11
net/netfilter/nft_compat.c
View File

@ -42,7 +42,8 @@ static int nft_compat_chain_validate_dependency(const char *tablename,
{
const struct nft_base_chain *basechain;
if (!tablename || !(chain->flags & NFT_BASE_CHAIN))
if (!tablename ||
!nft_is_base_chain(chain))
return 0;
basechain = nft_base_chain(chain);
@ -165,7 +166,7 @@ nft_target_set_tgchk_param(struct xt_tgchk_param *par,
par->entryinfo = entry;
par->target = target;
par->targinfo = info;
if (ctx->chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
const struct nf_hook_ops *ops = &basechain->ops[0];
@ -298,7 +299,7 @@ static int nft_target_validate(const struct nft_ctx *ctx,
unsigned int hook_mask = 0;
int ret;
if (ctx->chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
const struct nf_hook_ops *ops = &basechain->ops[0];
@ -379,7 +380,7 @@ nft_match_set_mtchk_param(struct xt_mtchk_param *par, const struct nft_ctx *ctx,
par->entryinfo = entry;
par->match = match;
par->matchinfo = info;
if (ctx->chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
const struct nf_hook_ops *ops = &basechain->ops[0];
@ -477,7 +478,7 @@ static int nft_match_validate(const struct nft_ctx *ctx,
unsigned int hook_mask = 0;
int ret;
if (ctx->chain->flags & NFT_BASE_CHAIN) {
if (nft_is_base_chain(ctx->chain)) {
const struct nft_base_chain *basechain =
nft_base_chain(ctx->chain);
const struct nf_hook_ops *ops = &basechain->ops[0];