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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-31 05:36:23 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-11-08 13:50:09 -0800 |
| commit | 5456f09aaf88731e16dbcea7522cb330b6846415 (patch) | |
| tree | eac95420f5da87dc95342aa23d9a97653544863d /Documentation/sysctl | |
| parent | 67426b756c4d52c511c4b22b269accea171692a8 (diff) | |
| download | linux-5456f09aaf88731e16dbcea7522cb330b6846415.tar.bz2 | |
af_unix: fix unix_dgram_poll() behavior for EPOLLOUT event
Alban Crequy reported a problem with connected dgram af_unix sockets and
provided a test program. epoll() would miss to send an EPOLLOUT event
when a thread unqueues a packet from the other peer, making its receive
queue not full.
This is because unix_dgram_poll() fails to call sock_poll_wait(file,
&unix_sk(other)->peer_wait, wait);
if the socket is not writeable at the time epoll_ctl(ADD) is called.
We must call sock_poll_wait(), regardless of 'writable' status, so that
epoll can be notified later of states changes.
Misc: avoids testing twice (sk->sk_shutdown & RCV_SHUTDOWN)
Reported-by: Alban Crequy <alban.crequy@collabora.co.uk>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/sysctl')
0 files changed, 0 insertions, 0 deletions