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util/oslib-win32: Do not treat null @errp as &error_warn

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qemu_socket_select() and its wrapper qemu_socket_unselect() treat a
null @errp as &error_warn.  This is wildly inappropriate.  A caller
passing null @errp specifies that errors are to be ignored.  If
warnings are wanted, the caller must pass &error_warn.

Change callers to do that, and drop the inappropriate treatment of
null @errp.

This assumes that warnings are wanted.  I'm not familiar with the
calling code, so I can't say whether it will work when the socket is
invalid, or WSAEventSelect() fails.  If it doesn't, then this should
be an error instead of a warning.  Invalid socket might even be a
programming error.

These warnings were introduced in commit f5fd677ae7 (win32/socket:
introduce qemu_socket_select() helper).  I considered reverting to
silence, but Daniel Berrangé asked for the warnings to be preserved.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250923091000.3180122-9-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
This commit is contained in:
Markus Armbruster 2025-09-23 11:09:55 +02:00
parent b46b8cf29c
commit 5bd58f04b8
4 changed files with 5 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

2
util/aio-win32.c
View file

@ -121,7 +121,7 @@ void aio_set_fd_handler(AioContext *ctx,
QLIST_INSERT_HEAD_RCU(&ctx->aio_handlers, node, node);
event = event_notifier_get_handle(&ctx->notifier);
qemu_socket_select(fd, event, bitmask, NULL);
qemu_socket_select(fd, event, bitmask, &error_warn);
}
if (old_node) {
aio_remove_fd_handler(ctx, old_node);

6
util/oslib-win32.c
View file

@ -182,7 +182,7 @@ bool qemu_set_blocking(int fd, bool block, Error **errp)
unsigned long opt = block ? 0 : 1;
if (block) {
qemu_socket_unselect(fd, NULL);
qemu_socket_unselect(fd, &error_warn);
}
if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
@ -293,10 +293,6 @@ bool qemu_socket_select(int sockfd, WSAEVENT hEventObject,
{
SOCKET s = _get_osfhandle(sockfd);
if (errp == NULL) {
errp = &error_warn;
}
if (s == INVALID_SOCKET) {
error_setg(errp, "invalid socket fd=%d", sockfd);
return false;