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| author | Eric Dumazet <edumazet@google.com> | 2015-03-16 05:12:16 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-16 20:55:29 +0100 |
| commit | 13854e5a60461daee08ce99842b7f4d37553d911 (patch) | |
| tree | f7bf7650ead7d8af1e93d98114da5cd1bf658956 /include/net/inet_connection_sock.h | |
| parent | inet: factorize sock_edemux()/sock_gen_put() code (diff) | |
| download | linux-13854e5a60461daee08ce99842b7f4d37553d911.tar.xz linux-13854e5a60461daee08ce99842b7f4d37553d911.zip | |
inet: add proper refcounting to request sock
reqsk_put() is the generic function that should be used
to release a refcount (and automatically call reqsk_free())
reqsk_free() might be called if refcount is known to be 0
or undefined.
refcnt is set to one in inet_csk_reqsk_queue_add()
As request socks are not yet in global ehash table,
I added temporary debugging checks in reqsk_put() and reqsk_free()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_connection_sock.h')
| -rw-r--r-- | include/net/inet_connection_sock.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h index b9a6b0a94cc6..191feec60205 100644 --- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -275,6 +275,11 @@ static inline void inet_csk_reqsk_queue_add(struct sock *sk, struct sock *child) { reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child); + /* before letting lookups find us, make sure all req fields + * are committed to memory. + */ + smp_wmb(); + atomic_set(&req->rsk_refcnt, 1); } void inet_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req, |