From: Stanislav Fomichev <sdf@google•com>
To: netdev@vger•kernel.org
Cc: davem@davemloft•net, ast@kernel•org, daniel@iogearbox•net,
simon.horman@netronome•com, willemb@google•com,
Stanislav Fomichev <sdf@google•com>
Subject: [RFC bpf-next 2/7] net: introduce skb_net helper
Date: Tue, 5 Feb 2019 09:36:24 -0800 [thread overview]
Message-ID: <20190205173629.160717-3-sdf@google.com> (raw)
In-Reply-To: <20190205173629.160717-1-sdf@google.com>
skb_net returns network namespace from the associated device or socket.
This will be used in the next commit.
Signed-off-by: Stanislav Fomichev <sdf@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
next prev parent reply other threads:[~2019-02-05 17:36 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-05 17:36 [RFC bpf-next 0/7] net: flow_dissector: trigger BPF hook when called from eth_get_headlen Stanislav Fomichev
2019-02-05 17:36 ` [RFC bpf-next 1/7] net: introduce __init_skb and __init_skb_shinfo helpers Stanislav Fomichev
2019-02-05 20:18 ` Willem de Bruijn
2019-02-05 17:36 ` Stanislav Fomichev [this message]
2019-02-05 20:19 ` [RFC bpf-next 2/7] net: introduce skb_net helper Willem de Bruijn
2019-02-05 20:42 ` Stanislav Fomichev
2019-02-05 17:36 ` [RFC bpf-next 3/7] net: plumb network namespace into __skb_flow_dissect Stanislav Fomichev
2019-02-05 20:19 ` Willem de Bruijn
2019-02-05 20:40 ` Stanislav Fomichev
2019-02-05 17:36 ` [RFC bpf-next 4/7] net: flow_dissector: handle no-skb use case Stanislav Fomichev
2019-02-05 20:19 ` Willem de Bruijn
2019-02-05 20:45 ` Stanislav Fomichev
2019-02-05 17:36 ` [RFC bpf-next 5/7] bpf: when doing BPF_PROG_TEST_RUN for flow dissector use no-skb mode Stanislav Fomichev
2019-02-05 20:19 ` Willem de Bruijn
2019-02-05 17:36 ` [RFC bpf-next 6/7] selftests/bpf: add flow dissector bpf_skb_load_bytes helper test Stanislav Fomichev
2019-02-05 17:36 ` [RFC bpf-next 7/7] net: flow_dissector: pass net argument to the eth_get_headlen Stanislav Fomichev
2019-02-05 20:18 ` [RFC bpf-next 0/7] net: flow_dissector: trigger BPF hook when called from eth_get_headlen Willem de Bruijn
2019-02-05 20:40 ` Stanislav Fomichev
2019-02-06 0:47 ` Alexei Starovoitov
2019-02-06 0:59 ` Stanislav Fomichev
2019-02-06 3:12 ` Alexei Starovoitov
2019-02-06 3:56 ` Stanislav Fomichev
2019-02-06 4:11 ` Alexei Starovoitov
2019-02-06 5:49 ` Stanislav Fomichev
2019-02-12 17:02 ` Stanislav Fomichev
2019-02-14 4:39 ` Alexei Starovoitov
2019-02-14 5:57 ` Stanislav Fomichev
2019-02-14 6:38 ` Alexei Starovoitov
2019-02-14 17:35 ` Stanislav Fomichev
2019-02-25 20:33 ` Stanislav Fomichev
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