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Message-Id: <20210329075633.974871349@linuxfoundation.org>
Date: Mon, 29 Mar 2021 09:57:55 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 144/221] netfilter: nftables: allow to update flowtable flags
From: Pablo Neira Ayuso <pablo@...filter.org>
[ Upstream commit 7b35582cd04ace2fd1807c1b624934e465cc939d ]
Honor flowtable flags from the control update path. Disallow disabling
to toggle hardware offload support though.
Fixes: 8bb69f3b2918 ("netfilter: nf_tables: add flowtable offload control plane")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
include/net/netfilter/nf_tables.h | 3 +++
net/netfilter/nf_tables_api.c | 15 +++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index c1c0a4ff92ae..ed4a9d098164 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1508,6 +1508,7 @@ struct nft_trans_flowtable {
struct nft_flowtable *flowtable;
bool update;
struct list_head hook_list;
+ u32 flags;
};
#define nft_trans_flowtable(trans) \
@@ -1516,6 +1517,8 @@ struct nft_trans_flowtable {
(((struct nft_trans_flowtable *)trans->data)->update)
#define nft_trans_flowtable_hooks(trans) \
(((struct nft_trans_flowtable *)trans->data)->hook_list)
+#define nft_trans_flowtable_flags(trans) \
+ (((struct nft_trans_flowtable *)trans->data)->flags)
int __init nft_chain_filter_init(void);
void nft_chain_filter_fini(void);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 7cdbe8733540..978a968d7aed 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6632,6 +6632,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
struct nft_hook *hook, *next;
struct nft_trans *trans;
bool unregister = false;
+ u32 flags;
int err;
err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
@@ -6646,6 +6647,17 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
}
}
+ if (nla[NFTA_FLOWTABLE_FLAGS]) {
+ flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
+ if (flags & ~NFT_FLOWTABLE_MASK)
+ return -EOPNOTSUPP;
+ if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
+ (flags & NFT_FLOWTABLE_HW_OFFLOAD))
+ return -EOPNOTSUPP;
+ } else {
+ flags = flowtable->data.flags;
+ }
+
err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
&flowtable_hook.list, flowtable);
if (err < 0)
@@ -6659,6 +6671,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
goto err_flowtable_update_hook;
}
+ nft_trans_flowtable_flags(trans) = flags;
nft_trans_flowtable(trans) = flowtable;
nft_trans_flowtable_update(trans) = true;
INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
@@ -7968,6 +7981,8 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
break;
case NFT_MSG_NEWFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
+ nft_trans_flowtable(trans)->data.flags =
+ nft_trans_flowtable_flags(trans);
nf_tables_flowtable_notify(&trans->ctx,
nft_trans_flowtable(trans),
&nft_trans_flowtable_hooks(trans),
--
2.30.1
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