sockets: change inet_connect() to support nonblock socket

Add a bool argument to inet_connect() to assign if set socket
to block/nonblock, and delete original argument 'socktype'
that is unused.
Add a new argument to inet_connect()/inet_connect_opts(),
to pass back connect error by error class.

Retry to connect when -EINTR is got. Connect's successful
for nonblock socket when following errors are got, user
should wait for connecting by select():
  -EINPROGRESS
  -EWOULDBLOCK (win32)
  -WSAEALREADY (win32)

Change nbd, vnc to use new interface.

Signed-off-by: Amos Kong <akong@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/qemu_socket.h b/qemu_socket.h
index a5d0a84..26998ef 100644
--- a/qemu_socket.h
+++ b/qemu_socket.h
@@ -27,6 +27,8 @@ int inet_aton(const char *cp, struct in_addr *ia);
 #endif /* !_WIN32 */
 
 #include "qemu-option.h"
+#include "error.h"
+#include "qerror.h"
 
 /* misc helpers */
 int qemu_socket(int domain, int type, int protocol);
@@ -40,8 +42,8 @@ int send_all(int fd, const void *buf, int len1);
 int inet_listen_opts(QemuOpts *opts, int port_offset);
 int inet_listen(const char *str, char *ostr, int olen,
                 int socktype, int port_offset);
-int inet_connect_opts(QemuOpts *opts);
-int inet_connect(const char *str, int socktype);
+int inet_connect_opts(QemuOpts *opts, Error **errp);
+int inet_connect(const char *str, bool block, Error **errp);
 int inet_dgram_opts(QemuOpts *opts);
 const char *inet_strfamily(int family);