[PATCH net-next v2 4/7] netfilter: use in_dev_for_each_ifa_rcu
From: Florian Westphal <fw@strlen.de>
Date: 2019-05-31 12:29:46
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Netfilter hooks are always running under rcu read lock, use the new iterator macro so sparse won't complain once we add proper __rcu annotations. Signed-off-by: Florian Westphal <fw@strlen.de> --- net/ipv4/netfilter/nf_tproxy_ipv4.c | 9 +++++++-- net/netfilter/nf_conntrack_broadcast.c | 9 +++++++-- net/netfilter/nfnetlink_osf.c | 5 ++--- 3 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/net/ipv4/netfilter/nf_tproxy_ipv4.c b/net/ipv4/netfilter/nf_tproxy_ipv4.c
index 164714104965..40c93b3bd731 100644
--- a/net/ipv4/netfilter/nf_tproxy_ipv4.c
+++ b/net/ipv4/netfilter/nf_tproxy_ipv4.c@@ -53,6 +53,7 @@ EXPORT_SYMBOL_GPL(nf_tproxy_handle_time_wait4); __be32 nf_tproxy_laddr4(struct sk_buff *skb, __be32 user_laddr, __be32 daddr) { + const struct in_ifaddr *ifa; struct in_device *indev; __be32 laddr;
@@ -61,10 +62,14 @@ __be32 nf_tproxy_laddr4(struct sk_buff *skb, __be32 user_laddr, __be32 daddr) laddr = 0; indev = __in_dev_get_rcu(skb->dev); - for_primary_ifa(indev) { + + in_dev_for_each_ifa_rcu(ifa, indev) { + if (ifa->ifa_flags & IFA_F_SECONDARY) + continue; + laddr = ifa->ifa_local; break; - } endfor_ifa(indev); + } return laddr ? laddr : daddr; }
diff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c
index 5423b197d98a..a5dbc3676a4f 100644
--- a/net/netfilter/nf_conntrack_broadcast.c
+++ b/net/netfilter/nf_conntrack_broadcast.c@@ -41,12 +41,17 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb, in_dev = __in_dev_get_rcu(rt->dst.dev); if (in_dev != NULL) { - for_primary_ifa(in_dev) { + const struct in_ifaddr *ifa; + + in_dev_for_each_ifa_rcu(ifa, in_dev) { + if (ifa->ifa_flags & IFA_F_SECONDARY) + continue; + if (ifa->ifa_broadcast == iph->daddr) { mask = ifa->ifa_mask; break; } - } endfor_ifa(in_dev); + } } if (mask == 0)
diff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c
index f42326b40d6f..9f5dea0064ea 100644
--- a/net/netfilter/nfnetlink_osf.c
+++ b/net/netfilter/nfnetlink_osf.c@@ -33,6 +33,7 @@ static inline int nf_osf_ttl(const struct sk_buff *skb, { struct in_device *in_dev = __in_dev_get_rcu(skb->dev); const struct iphdr *ip = ip_hdr(skb); + const struct in_ifaddr *ifa; int ret = 0; if (ttl_check == NF_OSF_TTL_TRUE)
@@ -42,15 +43,13 @@ static inline int nf_osf_ttl(const struct sk_buff *skb, else if (ip->ttl <= f_ttl) return 1; - for_ifa(in_dev) { + in_dev_for_each_ifa_rcu(ifa, in_dev) { if (inet_ifa_match(ip->saddr, ifa)) { ret = (ip->ttl == f_ttl); break; } } - endfor_ifa(in_dev); - return ret; }
--
2.21.0