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netfilter: nf_tables: fix update chain error

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# nft add table filter
 # nft add chain filter c1
 # nft rename chain filter c1 c2

Error: Could not process rule: No such file or directory
rename chain filter c1 c2
^^^^^^^^^^^^^^^^^^^^^^^^^^

 # nft add chain filter c2
 # nft rename chain filter c1 c2
 # nft list table filter

table ip filter {
	chain c2 {
	}

	chain c2 {
	}
}

Fixes: 664b0f8cd8 ("netfilter: nf_tables: add generation mask to chains")
Signed-off-by: JingPiao Chen <chenjingpiao@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
JingPiao Chen 2017-09-23 17:10:44 +08:00 committed by Pablo Neira Ayuso
parent e5173418ac
commit 0d18779be1
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nf_tables_api.c
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@ -1487,8 +1487,8 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
chain2 = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME],
genmask);
if (IS_ERR(chain2))
return PTR_ERR(chain2);
if (!IS_ERR(chain2))
return -EEXIST;
}
if (nla[NFTA_CHAIN_COUNTERS]) {