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netfilter: nf_tables: store chain pointer in rule transaction

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Currently the chain can be derived from trans->ctx.chain, but
the ctx will go away soon.

Thus add the chain pointer to nft_trans_rule structure itself.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2024-06-24 20:57:03 +02:00 committed by Pablo Neira Ayuso
parent d4f6f3994e
commit 13f20bc9ec
3 changed files with 22 additions and 18 deletions
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3
include/net/netfilter/nf_tables.h
View File

@ -1640,6 +1640,7 @@ struct nft_trans_binding {
struct nft_trans_rule {
struct nft_trans nft_trans;
struct nft_rule *rule;
struct nft_chain *chain;
struct nft_flow_rule *flow;
u32 rule_id;
bool bound;
@ -1655,6 +1656,8 @@ struct nft_trans_rule {
nft_trans_container_rule(trans)->rule_id
#define nft_trans_rule_bound(trans) \
nft_trans_container_rule(trans)->bound
#define nft_trans_rule_chain(trans) \
nft_trans_container_rule(trans)->chain
struct nft_trans_set {
struct nft_trans_binding nft_trans_binding;

21
net/netfilter/nf_tables_api.c
View File

@ -251,7 +251,7 @@ static void __nft_chain_trans_bind(const struct nft_ctx *ctx,
nft_trans_chain_bound(trans) = bind;
break;
case NFT_MSG_NEWRULE:
if (trans->ctx.chain == chain)
if (nft_trans_rule_chain(trans) == chain)
nft_trans_rule_bound(trans) = bind;
break;
}
@ -541,6 +541,7 @@ static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
}
nft_trans_rule(trans) = rule;
nft_trans_rule_chain(trans) = ctx->chain;
nft_trans_commit_list_add_tail(ctx->net, trans);
return trans;
@ -4227,7 +4228,7 @@ static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
list_for_each_entry(trans, &nft_net->commit_list, list) {
if (trans->msg_type == NFT_MSG_NEWRULE &&
trans->ctx.chain == chain &&
nft_trans_rule_chain(trans) == chain &&
id == nft_trans_rule_id(trans))
return nft_trans_rule(trans);
}
@ -9684,7 +9685,7 @@ static void nf_tables_commit_chain_prepare_cancel(struct net *net)
list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
if (trans->msg_type == NFT_MSG_NEWRULE ||
trans->msg_type == NFT_MSG_DELRULE) {
struct nft_chain *chain = trans->ctx.chain;
struct nft_chain *chain = nft_trans_rule_chain(trans);
kvfree(chain->blob_next);
chain->blob_next = NULL;
@ -10250,7 +10251,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
}
if (trans->msg_type == NFT_MSG_NEWRULE ||
trans->msg_type == NFT_MSG_DELRULE) {
chain = trans->ctx.chain;
chain = nft_trans_rule_chain(trans);
ret = nf_tables_commit_chain_prepare(net, chain);
if (ret < 0) {
@ -10346,7 +10347,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nf_tables_rule_notify(&trans->ctx,
nft_trans_rule(trans),
NFT_MSG_NEWRULE);
if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
if (nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD)
nft_flow_rule_destroy(nft_trans_flow_rule(trans));
nft_trans_destroy(trans);
@ -10361,7 +10362,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_rule(trans),
NFT_TRANS_COMMIT);
if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
if (nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD)
nft_flow_rule_destroy(nft_trans_flow_rule(trans));
break;
case NFT_MSG_NEWSET:
@ -10645,20 +10646,20 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
nft_trans_destroy(trans);
break;
}
nft_use_dec_restore(&trans->ctx.chain->use);
nft_use_dec_restore(&nft_trans_rule_chain(trans)->use);
list_del_rcu(&nft_trans_rule(trans)->list);
nft_rule_expr_deactivate(&trans->ctx,
nft_trans_rule(trans),
NFT_TRANS_ABORT);
if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
if (nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD)
nft_flow_rule_destroy(nft_trans_flow_rule(trans));
break;
case NFT_MSG_DELRULE:
case NFT_MSG_DESTROYRULE:
nft_use_inc_restore(&trans->ctx.chain->use);
nft_use_inc_restore(&nft_trans_rule_chain(trans)->use);
nft_clear(trans->ctx.net, nft_trans_rule(trans));
nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
if (nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD)
nft_flow_rule_destroy(nft_trans_flow_rule(trans));
nft_trans_destroy(trans);

16
net/netfilter/nf_tables_offload.c
View File

@ -533,18 +533,18 @@ static void nft_flow_rule_offload_abort(struct net *net,
FLOW_BLOCK_BIND);
break;
case NFT_MSG_NEWRULE:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
err = nft_flow_offload_rule(trans->ctx.chain,
err = nft_flow_offload_rule(nft_trans_rule_chain(trans),
nft_trans_rule(trans),
NULL, FLOW_CLS_DESTROY);
break;
case NFT_MSG_DELRULE:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
err = nft_flow_offload_rule(trans->ctx.chain,
err = nft_flow_offload_rule(nft_trans_rule_chain(trans),
nft_trans_rule(trans),
nft_trans_flow_rule(trans),
FLOW_CLS_REPLACE);
@ -586,7 +586,7 @@ int nft_flow_rule_offload_commit(struct net *net)
FLOW_BLOCK_UNBIND);
break;
case NFT_MSG_NEWRULE:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
if (trans->ctx.flags & NLM_F_REPLACE ||
@ -594,16 +594,16 @@ int nft_flow_rule_offload_commit(struct net *net)
err = -EOPNOTSUPP;
break;
}
err = nft_flow_offload_rule(trans->ctx.chain,
err = nft_flow_offload_rule(nft_trans_rule_chain(trans),
nft_trans_rule(trans),
nft_trans_flow_rule(trans),
FLOW_CLS_REPLACE);
break;
case NFT_MSG_DELRULE:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_rule_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
err = nft_flow_offload_rule(trans->ctx.chain,
err = nft_flow_offload_rule(nft_trans_rule_chain(trans),
nft_trans_rule(trans),
NULL, FLOW_CLS_DESTROY);
break;