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tcp: no longer release socket ownership in tcp_release_cb() 

This partially reverts c3f9b01849 ("tcp: tcp_release_cb()
should release socket ownership").

prequeue has been removed by Florian in commit e7942d0633
("tcp: remove prequeue support")

__tcp_checksum_complete_user() being gone, we no longer
have to release socket ownership in tcp_release_cb().

This is a prereq for third patch in the series
("net: call prot->release_cb() when processing backlog").

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Eric Dumazet 2023-09-11 17:05:28 +00:00 committed by Paolo Abeni
parent cd8bae8581
commit b49d252216
2 changed files with 0 additions and 13 deletions
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3
net/core/sock.c
View File

@ -3519,9 +3519,6 @@ void release_sock(struct sock *sk)
if (sk->sk_backlog.tail)
__release_sock(sk);
/* Warning : release_cb() might need to release sk ownership,
* ie call sock_release_ownership(sk) before us.
*/
if (sk->sk_prot->release_cb)
sk->sk_prot->release_cb(sk);

10
net/ipv4/tcp_output.c
View File

@ -1101,16 +1101,6 @@ void tcp_release_cb(struct sock *sk)
tcp_tsq_write(sk);
__sock_put(sk);
}
/* Here begins the tricky part :
* We are called from release_sock() with :
* 1) BH disabled
* 2) sk_lock.slock spinlock held
* 3) socket owned by us (sk->sk_lock.owned == 1)
*
* But following code is meant to be called from BH handlers,
* so we should keep BH disabled, but early release socket ownership
*/
sock_release_ownership(sk);
if (flags & TCPF_WRITE_TIMER_DEFERRED) {
tcp_write_timer_handler(sk);