diff options
| author |   Cong Wang <cong.wang@bytedance.com> | 2021-10-08 13:33:05 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2021-10-26 12:29:33 -0700 |
| commit | af493388950b6ea3a86f860cfaffab137e024fc8 (patch) | |
| tree | 455eada3764f5a609fca659442e3cc5a43e4d7dd /net/ipv4/udp.c | |
| parent | skmsg: Extract and reuse sk_msg_is_readable() (diff) | |
| download | linux-dev-af493388950b6ea3a86f860cfaffab137e024fc8.tar.xz linux-dev-af493388950b6ea3a86f860cfaffab137e024fc8.zip | |
net: Implement ->sock_is_readable() for UDP and AF_UNIX
Yucong noticed we can't poll() sockets in sockmap even
when they are the destination sockets of redirections.
This is because we never poll any psock queues in ->poll(),
except for TCP. With ->sock_is_readable() now we can
overwrite >sock_is_readable(), invoke and implement it for
both UDP and AF_UNIX sockets.
Reported-by: Yucong Sun <sunyucong@gmail.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211008203306.37525-4-xiyou.wangcong@gmail.com
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 8536b2a7210b..2fffcf2b54f3 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2867,6 +2867,9 @@ __poll_t udp_poll(struct file *file, struct socket *sock, poll_table *wait) !(sk->sk_shutdown & RCV_SHUTDOWN) && first_packet_length(sk) == -1) mask &= ~(EPOLLIN | EPOLLRDNORM); + /* psock ingress_msg queue should not contain any bad checksum frames */ + if (sk_is_readable(sk)) + mask |= EPOLLIN | EPOLLRDNORM; return mask; } |