From 5c178d81b69f08ca3195427a6ea9a46d9af23127 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 3 Feb 2017 13:35:49 +0100 Subject: [PATCH] netfilter: nft_ct: prepare for key-dependent error unwind Next patch will add ZONE_ID set support which will need similar error unwind (put operation) as conntrack labels. Prepare for this: remove the 'label_got' boolean in favor of a switch statement that can be extended in next patch. As we already have that in the set_destroy function place that in a separate function and call it from the set init function. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_ct.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c index 5bd4cdf..2d82df2 100644 --- a/net/netfilter/nft_ct.c +++ b/net/netfilter/nft_ct.c @@ -386,12 +386,24 @@ static int nft_ct_get_init(const struct nft_ctx *ctx, return 0; } +static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv) +{ + switch (priv->key) { +#ifdef CONFIG_NF_CONNTRACK_LABELS + case NFT_CT_LABELS: + nf_connlabels_put(ctx->net); + break; +#endif + default: + break; + } +} + static int nft_ct_set_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) { struct nft_ct *priv = nft_expr_priv(expr); - bool label_got = false; unsigned int len; int err; @@ -412,7 +424,6 @@ static int nft_ct_set_init(const struct nft_ctx *ctx, err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1); if (err) return err; - label_got = true; break; #endif default: @@ -431,8 +442,7 @@ static int nft_ct_set_init(const struct nft_ctx *ctx, return 0; err1: - if (label_got) - nf_connlabels_put(ctx->net); + __nft_ct_set_destroy(ctx, priv); return err; } @@ -447,16 +457,7 @@ static void nft_ct_set_destroy(const struct nft_ctx *ctx, { struct nft_ct *priv = nft_expr_priv(expr); - switch (priv->key) { -#ifdef CONFIG_NF_CONNTRACK_LABELS - case NFT_CT_LABELS: - nf_connlabels_put(ctx->net); - break; -#endif - default: - break; - } - + __nft_ct_set_destroy(ctx, priv); nft_ct_netns_put(ctx->net, ctx->afi->family); } -- 2.7.4