Searched hist:"37179 e9e" (Results 1 – 1 of 1) sorted by relevance
/openbmc/qemu/util/ |
H A D | qemu-sockets.c | 37179e9e Wed Mar 10 11:30:04 CST 2021 Stefan Hajnoczi <stefanha@redhat.com> sockets: update SOCKET_ADDRESS_TYPE_FD listen(2) backlog socket_get_fd() fails with the error "socket_get_fd: too many connections" if the given listen backlog value is not 1. Not all callers set the backlog to 1. For example, commit 582d4210eb2f2ab5baac328fe4b479cd86da1647 ("qemu-nbd: Use SOMAXCONN for socket listen() backlog") uses SOMAXCONN. This will always fail with in socket_get_fd(). This patch calls listen(2) on the fd to update the backlog value. The socket may already be in the listen state. I have tested that this works on Linux 5.10 and macOS Catalina. As a bonus this allows us to detect when the fd cannot listen. Now we'll be able to catch unbound or connected fds in socket_listen(). Drop the num argument from socket_get_fd() since this function is also called by socket_connect() where a listen backlog value does not make sense. Fixes: e5b6353cf25c99c3f08bf51e29933352f7140e8f ("socket: Add backlog parameter to socket_listen") Reported-by: Richard W.M. Jones <rjones@redhat.com> Cc: Juan Quintela <quintela@redhat.com> Cc: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210310173004.420190-1-stefanha@redhat.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
|