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netfilter: nf_tables: avoid usage of embedded nft_ctx

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nft_ctx is stored in nft_trans object, but nft_ctx is large
(48 bytes on 64-bit platforms), it should not be embedded in
the transaction structures.

Reduce its usage so we can remove it eventually.

This replaces trans->ctx.chain with the chain pointer
already available in nft_trans_chain structure.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2024-05-13 15:00:47 +02:00 committed by Pablo Neira Ayuso
parent 0c2e0ee861
commit d4f6f3994e
2 changed files with 13 additions and 13 deletions
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10
net/netfilter/nf_tables_api.c
View File

@ -9682,10 +9682,10 @@ static void nf_tables_commit_chain_prepare_cancel(struct net *net)
struct nft_trans *trans, *next;
list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
struct nft_chain *chain = trans->ctx.chain;
if (trans->msg_type == NFT_MSG_NEWRULE ||
trans->msg_type == NFT_MSG_DELRULE) {
struct nft_chain *chain = trans->ctx.chain;
kvfree(chain->blob_next);
chain->blob_next = NULL;
}
@ -10318,7 +10318,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
/* trans destroyed after rcu grace period */
} else {
nft_chain_commit_drop_policy(nft_trans_container_chain(trans));
nft_clear(net, trans->ctx.chain);
nft_clear(net, nft_trans_chain(trans));
nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
nft_trans_destroy(trans);
}
@ -10334,11 +10334,11 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
true);
}
} else {
nft_chain_del(trans->ctx.chain);
nft_chain_del(nft_trans_chain(trans));
nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
NULL);
nf_tables_unregister_hook(trans->ctx.net, table,
trans->ctx.chain);
nft_trans_chain(trans));
}
break;
case NFT_MSG_NEWRULE:

16
net/netfilter/nf_tables_offload.c
View File

@ -518,18 +518,18 @@ static void nft_flow_rule_offload_abort(struct net *net,
switch (trans->msg_type) {
case NFT_MSG_NEWCHAIN:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD) ||
if (!(nft_trans_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD) ||
nft_trans_chain_update(trans))
continue;
err = nft_flow_offload_chain(trans->ctx.chain, NULL,
err = nft_flow_offload_chain(nft_trans_chain(trans), NULL,
FLOW_BLOCK_UNBIND);
break;
case NFT_MSG_DELCHAIN:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
err = nft_flow_offload_chain(trans->ctx.chain, NULL,
err = nft_flow_offload_chain(nft_trans_chain(trans), NULL,
FLOW_BLOCK_BIND);
break;
case NFT_MSG_NEWRULE:
@ -569,20 +569,20 @@ int nft_flow_rule_offload_commit(struct net *net)
switch (trans->msg_type) {
case NFT_MSG_NEWCHAIN:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD) ||
if (!(nft_trans_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD) ||
nft_trans_chain_update(trans))
continue;
policy = nft_trans_chain_policy(trans);
err = nft_flow_offload_chain(trans->ctx.chain, &policy,
err = nft_flow_offload_chain(nft_trans_chain(trans), &policy,
FLOW_BLOCK_BIND);
break;
case NFT_MSG_DELCHAIN:
if (!(trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD))
if (!(nft_trans_chain(trans)->flags & NFT_CHAIN_HW_OFFLOAD))
continue;
policy = nft_trans_chain_policy(trans);
err = nft_flow_offload_chain(trans->ctx.chain, &policy,
err = nft_flow_offload_chain(nft_trans_chain(trans), &policy,
FLOW_BLOCK_UNBIND);
break;
case NFT_MSG_NEWRULE: