[PATCH bpf-next v3 06/12] bpf: sockmap: simplify sock_map_init_proto
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STALE2416d
SUPERSEDED
From: Lorenz Bauer <hidden>
Date: 2020-03-04 10:14:20
Also in:
bpf, lkml
Subsystem:
bpf [l7 framework] (sockmap), networking [general], networking [sockets], the rest · Maintainers:
John Fastabend, Jakub Sitnicki, Jiayuan Chen, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
Revision v3 of 4 in this series.
Revisions (4)
- v1 [diff vs current]
- v2 [diff vs current]
- v3 current
- v4 [diff vs current]
We can take advantage of the fact that both callers of sock_map_init_proto are holding a RCU read lock, and have verified that psock is valid. Signed-off-by: Lorenz Bauer <redacted> --- net/core/sock_map.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 9898294e119d..83c5082cefd3 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c@@ -141,28 +141,17 @@ static void sock_map_unref(struct sock *sk, void *link_raw) } } -static int sock_map_init_proto(struct sock *sk) +static int sock_map_init_proto(struct sock *sk, struct sk_psock *psock) { - struct sk_psock *psock; struct proto *prot; sock_owned_by_me(sk); - rcu_read_lock(); - psock = sk_psock(sk); - if (unlikely(!psock)) { - rcu_read_unlock(); - return -EINVAL; - } - prot = tcp_bpf_get_proto(sk, psock); - if (IS_ERR(prot)) { - rcu_read_unlock(); + if (IS_ERR(prot)) return PTR_ERR(prot); - } sk_psock_update_proto(sk, psock, prot); - rcu_read_unlock(); return 0; }
@@ -241,7 +230,7 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs, if (msg_parser) psock_set_prog(&psock->progs.msg_parser, msg_parser); - ret = sock_map_init_proto(sk); + ret = sock_map_init_proto(sk, psock); if (ret < 0) goto out_drop;
@@ -286,7 +275,7 @@ static int sock_map_link_no_progs(struct bpf_map *map, struct sock *sk) if (!psock) return -ENOMEM; - ret = sock_map_init_proto(sk); + ret = sock_map_init_proto(sk, psock); if (ret < 0) sk_psock_put(sk, psock); return ret;
--
2.20.1