5.4-stable review patch. If anyone has any objections, please let me know.
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From: Florian Westphal fw@strlen.de
commit 8965d42bcf54d42cbc72fe34a9d0ec3f8527debd upstream.
It would be better to not store nft_ctx inside nft_trans object, the netlink ctx strucutre is huge and most of its information is never needed in places that use trans->ctx.
Avoid/reduce its usage if possible, no runtime behaviour change intended.
Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/nf_tables_api.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-)
--- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -1675,10 +1675,8 @@ static void nf_tables_chain_free_chain_r kvfree(chain->rules_next); }
-static void nf_tables_chain_destroy(struct nft_ctx *ctx) +void nf_tables_chain_destroy(struct nft_chain *chain) { - struct nft_chain *chain = ctx->chain; - if (WARN_ON(chain->use > 0)) return;
@@ -1929,7 +1927,7 @@ err2: err_use: nf_tables_unregister_hook(net, table, chain); err1: - nf_tables_chain_destroy(ctx); + nf_tables_chain_destroy(chain);
return err; } @@ -6905,7 +6903,7 @@ static void nft_commit_release(struct nf kfree(nft_trans_chain_name(trans)); break; case NFT_MSG_DELCHAIN: - nf_tables_chain_destroy(&trans->ctx); + nf_tables_chain_destroy(trans->ctx.chain); break; case NFT_MSG_DELRULE: nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); @@ -7582,7 +7580,7 @@ static void nf_tables_abort_release(stru nf_tables_table_destroy(&trans->ctx); break; case NFT_MSG_NEWCHAIN: - nf_tables_chain_destroy(&trans->ctx); + nf_tables_chain_destroy(trans->ctx.chain); break; case NFT_MSG_NEWRULE: nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); @@ -8233,7 +8231,7 @@ int __nft_release_basechain(struct nft_c } nft_chain_del(ctx->chain); nft_use_dec(&ctx->table->use); - nf_tables_chain_destroy(ctx); + nf_tables_chain_destroy(ctx->chain);
return 0; } @@ -8300,10 +8298,9 @@ static void __nft_release_table(struct n nft_obj_destroy(&ctx, obj); } list_for_each_entry_safe(chain, nc, &table->chains, list) { - ctx.chain = chain; nft_chain_del(chain); nft_use_dec(&table->use); - nf_tables_chain_destroy(&ctx); + nf_tables_chain_destroy(chain); } list_del(&table->list); nf_tables_table_destroy(&ctx);