skb_net returns network namespace from the associated device or socket.
This will be used in the next commit.
Signed-off-by: Stanislav Fomichev <s...@google.com>
---
include/linux/skbuff.h | 2 ++
net/core/skbuff.c | 10 ++++++++++
2 files changed, 12 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index ad883ab2762c..28723a86efdf 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -4343,5 +4343,7 @@ static inline __wsum lco_csum(struct sk_buff *skb)
return csum_partial(l4_hdr, csum_start - l4_hdr, partial);
}
+struct net *skb_net(const struct sk_buff *skb);
+
#endif /* __KERNEL__ */
#endif /* _LINUX_SKBUFF_H */
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 23c9cf100bd4..016db13fa2b6 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5585,6 +5585,16 @@ void skb_condense(struct sk_buff *skb)
skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
}
+struct net *skb_net(const struct sk_buff *skb)
+{
+ if (skb->dev)
+ return dev_net(skb->dev);
+ else if (skb->sk)
+ return sock_net(skb->sk);
+ return NULL;
+}
+EXPORT_SYMBOL(skb_net);
+
#ifdef CONFIG_SKB_EXTENSIONS
static void *skb_ext_get_ptr(struct skb_ext *ext, enum skb_ext_id id)
{
--
2.20.1.611.gfbb209baf1-goog
