On 2/5/21 3:55 AM, Daniel P. Berrangé wrote: >> +++ b/util/qemu-sockets.c >> @@ -1059,7 +1059,7 @@ int unix_listen(const char *str, Error **errp) >> >> saddr = g_new0(UnixSocketAddress, 1); >> saddr->path = g_strdup(str); >> - sock = unix_listen_saddr(saddr, 1, errp); >> + sock = unix_listen_saddr(saddr, SOMAXCONN, errp); >> qapi_free_UnixSocketAddress(saddr); >> return sock; >> } > > This method is a legacy back compat function, only used by the QEMU > guest agent, so this can't explain the NBD problems, which use the > QIONetListener class. > > IOW, the problem is in the qemu-nbd.c / blockdev-nbd.c code I believe
D'oh. Serves me right for trying to guess the spot using just a grep on listen() rather than running under gdb with a breakpoint to find the actual backtrace. v2 posted with a slightly changed subject line, and this time tested to actually work. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
