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| author | Joe Stringer <joe@wand.net.nz> | 2020-03-29 15:53:39 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-03-30 13:45:04 -0700 |
| commit | 71489e21d720a09388b565d60ef87ae993c10528 (patch) | |
| tree | 0ebc9f8445150e0cf11c71c628ba69f7ae50da15 /include/net/sock.h | |
| parent | cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 (diff) | |
| download | lwn-71489e21d720a09388b565d60ef87ae993c10528.tar.gz lwn-71489e21d720a09388b565d60ef87ae993c10528.zip | |
net: Track socket refcounts in skb_steal_sock()
Refactor the UDP/TCP handlers slightly to allow skb_steal_sock() to make
the determination of whether the socket is reference counted in the case
where it is prefetched by earlier logic such as early_demux.
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200329225342.16317-3-joe@wand.net.nz
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index dc398cee7873..f81d528845f6 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2537,15 +2537,23 @@ skb_sk_is_prefetched(struct sk_buff *skb) #endif /* CONFIG_INET */ } -static inline struct sock *skb_steal_sock(struct sk_buff *skb) +/** + * skb_steal_sock + * @skb to steal the socket from + * @refcounted is set to true if the socket is reference-counted + */ +static inline struct sock * +skb_steal_sock(struct sk_buff *skb, bool *refcounted) { if (skb->sk) { struct sock *sk = skb->sk; + *refcounted = true; skb->destructor = NULL; skb->sk = NULL; return sk; } + *refcounted = false; return NULL; } |