netfilter: nf_tables: delete chains via chain handle

Message ID 20180109191250.13089-1-harshasharmaiitr@gmail.com
State Changes Requested
Delegated to: Pablo Neira
Headers show
Series
  • netfilter: nf_tables: delete chains via chain handle
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Commit Message

Harsha Sharma Jan. 9, 2018, 7:12 p.m.
This patch allows deletion of chains via unique chain handle which can be
listed via '-a' option and table family and table name.

Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
---
 net/netfilter/nf_tables_api.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index f12671e0ec48..b4db7bd836d9 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1660,6 +1660,7 @@  static int nf_tables_delchain(struct net *net, struct sock *nlsk,
 	int family = nfmsg->nfgen_family;
 	struct nft_ctx ctx;
 	u32 use;
+	u64 handle;
 	int err;
 
 	afi = nf_tables_afinfo_lookup(net, family, false);
@@ -1670,7 +1671,12 @@  static int nf_tables_delchain(struct net *net, struct sock *nlsk,
 	if (IS_ERR(table))
 		return PTR_ERR(table);
 
-	chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask);
+	if (nla[NFTA_CHAIN_HANDLE]) {
+		handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
+		chain = nf_tables_chain_lookup_byhandle(table, handle, genmask);
+	} else {
+		chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask);
+	}
 	if (IS_ERR(chain))
 		return PTR_ERR(chain);