diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-01-30 21:03:00 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-02-02 17:49:29 -0800 |
| commit | 8776c4ef3ab22b95f55713f00a7a576e6402507d (patch) | |
| tree | 27635f01f17849639e166746ac5b1ec0dfe7a7cc /include | |
| parent | 94a150bf14af35e67c2ae9ca4650bfed42a9bc11 (diff) | |
inet: add dst4_mtu() and dst6_mtu() helpers
With CONFIG_MITIGATION_RETPOLINE=y dst_mtu() is a bit fat,
because it is generic.
Indeed, clang does not always inline it.
Add dst4_mtu() and dst6_mtu() helpers for callers that
expect either ipv4_mtu() or ip6_mtu() to be called.
These helpers are always inlined.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260130210303.3888261-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/dst.h | 6 | ||||
| -rw-r--r-- | include/net/ip6_route.h | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/net/dst.h b/include/net/dst.h index f8aa1239b4db..307073eae7f8 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -219,6 +219,12 @@ static inline u32 dst_mtu(const struct dst_entry *dst) return INDIRECT_CALL_INET(dst->ops->mtu, ip6_mtu, ipv4_mtu, dst); } +/* Variant of dst_mtu() for IPv4 users. */ +static inline u32 dst4_mtu(const struct dst_entry *dst) +{ + return INDIRECT_CALL_1(dst->ops->mtu, ipv4_mtu, dst); +} + /* RTT metrics are stored in milliseconds for user ABI, but used as jiffies */ static inline unsigned long dst_metric_rtt(const struct dst_entry *dst, int metric) { diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index 7c5512baa4b2..a55f9bf95fe3 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -266,6 +266,12 @@ static inline bool ipv6_anycast_destination(const struct dst_entry *dst, int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, int (*output)(struct net *, struct sock *, struct sk_buff *)); +/* Variant of dst_mtu() for IPv6 users */ +static inline u32 dst6_mtu(const struct dst_entry *dst) +{ + return INDIRECT_CALL_1(dst->ops->mtu, ip6_mtu, dst); +} + static inline unsigned int ip6_skb_dst_mtu(const struct sk_buff *skb) { const struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ? |