From: dsahern@kernel.org
To: netdev@vger.kernel.org, netfilter-devel@vger.kernel.org
Cc: pablo@netfilter.org, fw@strlen.de, David Ahern <dsahern@gmail.com>
Subject: [PATCH net-next 1/3] net/ipv4: Move device validation to helper
Date: Thu, 20 Sep 2018 13:50:47 -0700 [thread overview]
Message-ID: <20180920205049.15143-2-dsahern@kernel.org> (raw)
In-Reply-To: <20180920205049.15143-1-dsahern@kernel.org>
From: David Ahern <dsahern@gmail.com>
Move the device matching check in __fib_validate_source to a helper and
export it for use by netfilter modules. Code move only; no functional
change intended.
Signed-off-by: David Ahern <dsahern@gmail.com>
---
include/net/ip_fib.h | 1 +
net/ipv4/fib_frontend.c | 44 +++++++++++++++++++++++++++-----------------
2 files changed, 28 insertions(+), 17 deletions(-)
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 69c91d1934c1..f7c109e37298 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -373,6 +373,7 @@ static inline bool fib4_rules_early_flow_dissect(struct net *net,
extern const struct nla_policy rtm_ipv4_policy[];
void ip_fib_init(void);
__be32 fib_compute_spec_dst(struct sk_buff *skb);
+bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev);
int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
u8 tos, int oif, struct net_device *dev,
struct in_device *idev, u32 *itag);
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 2998b0e47d4b..222b968de94c 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -315,6 +315,32 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb)
return inet_select_addr(dev, ip_hdr(skb)->saddr, scope);
}
+bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev)
+{
+ bool dev_match = false;
+ int ret;
+
+#ifdef CONFIG_IP_ROUTE_MULTIPATH
+ for (ret = 0; ret < fi->fib_nhs; ret++) {
+ struct fib_nh *nh = &fi->fib_nh[ret];
+
+ if (nh->nh_dev == dev) {
+ dev_match = true;
+ break;
+ } else if (l3mdev_master_ifindex_rcu(nh->nh_dev) == dev->ifindex) {
+ dev_match = true;
+ break;
+ }
+ }
+#else
+ if (fi->fib_nh[0].nh_dev == dev)
+ dev_match = true;
+#endif
+
+ return dev_match;
+}
+EXPORT_SYMBOL_GPL(fib_info_nh_uses_dev);
+
/* Given (packet source, input interface) and optional (dst, oif, tos):
* - (main) check, that source is valid i.e. not broadcast or our local
* address.
@@ -361,24 +387,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
(res.type != RTN_LOCAL || !IN_DEV_ACCEPT_LOCAL(idev)))
goto e_inval;
fib_combine_itag(itag, &res);
- dev_match = false;
-
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
- for (ret = 0; ret < res.fi->fib_nhs; ret++) {
- struct fib_nh *nh = &res.fi->fib_nh[ret];
- if (nh->nh_dev == dev) {
- dev_match = true;
- break;
- } else if (l3mdev_master_ifindex_rcu(nh->nh_dev) == dev->ifindex) {
- dev_match = true;
- break;
- }
- }
-#else
- if (FIB_RES_DEV(res) == dev)
- dev_match = true;
-#endif
+ dev_match = fib_info_nh_uses_dev(res.fi, dev);
if (dev_match) {
ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
return ret;
--
2.11.0
next prev parent reply other threads:[~2018-09-21 2:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 20:50 [PATCH net-next 0/3] net: wean netfilter from fib_nh dsahern
2018-09-20 20:50 ` dsahern [this message]
2018-09-20 20:50 ` [PATCH net-next 2/3] netfilter: rpfilter: Convert rpfilter_lookup_reverse to new dev helper dsahern
2018-09-20 20:50 ` [PATCH net-next 3/3] netfilter: nft_fib: Convert nft_fib4_eval " dsahern
2018-09-20 20:53 ` [PATCH net-next 0/3] net: wean netfilter from fib_nh Florian Westphal
2018-09-21 3:02 ` David Miller
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