3:24 a.m.
---
src/rpc/virnetclient.c | 76 ++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 67 insertions(+), 9 deletions(-)
diff --git a/src/rpc/virnetclient.c b/src/rpc/virnetclient.c
index 7ea9a27..45b0edb 100644
--- a/src/rpc/virnetclient.c
+++ b/src/rpc/virnetclient.c
@@ -92,9 +92,13 @@ struct _virNetClient {
size_t nstreams;
virNetClientStreamPtr *streams;
+
+ bool wantClose;
};
+void virNetClientRequestClose(virNetClientPtr client);
+
static int virNetClientSendInternal(virNetClientPtr client,
virNetMessagePtr msg,
bool expectReply,
@@ -297,12 +301,14 @@ void virNetClientFree(virNetClientPtr client)
}
-void virNetClientClose(virNetClientPtr client)
+static void
+virNetClientCloseLocked(virNetClientPtr client)
{
- if (!client)
+ VIR_DEBUG("client=%p, sock=%p", client, client->sock);
+
+ if (!client->sock)
return;
- virNetClientLock(client);
virNetSocketRemoveIOCallback(client->sock);
virNetSocketFree(client->sock);
client->sock = NULL;
@@ -312,6 +318,41 @@ void virNetClientClose(virNetClientPtr client)
virNetSASLSessionFree(client->sasl);
client->sasl = NULL;
#endif
+ client->wantClose = false;
+}
+
+void virNetClientClose(virNetClientPtr client)
+{
+ if (!client)
+ return;
+
+ virNetClientLock(client);
+ virNetClientCloseLocked(client);
+ virNetClientUnlock(client);
+}
+
+void
+virNetClientRequestClose(virNetClientPtr client)
+{
+ VIR_DEBUG("client=%p", client);
+
+ virNetClientLock(client);
+
+ /* If there is a thread polling for data on the socket, set wantClose flag
+ * and wake the thread up or just immediately close the socket when no-one
+ * is polling on it.
+ */
+ if (client->waitDispatch) {
+ char ignore = 1;
+ int len = sizeof(ignore);
+
+ client->wantClose = true;
+ if (safewrite(client->wakeupSendFD, &ignore, len) != len)
+ VIR_ERROR(_("failed to wake up polling thread"));
+ } else {
+ virNetClientCloseLocked(client);
+ }
+
virNetClientUnlock(client);
}
@@ -856,11 +897,12 @@ static int virNetClientIOEventLoop(virNetClientPtr client,
int timeout = -1;
bool discardNonBlocking;
- /* If we have existing SASL decoded data we
- * don't want to sleep in the poll(), just
- * check if any other FDs are also ready
+ /* If we have existing SASL decoded data we don't want to sleep in
+ * the poll(), just check if any other FDs are also ready.
+ * If the connection is going to be closed, we don't want to sleep in
+ * poll() either.
*/
- if (virNetSocketHasCachedData(client->sock))
+ if (virNetSocketHasCachedData(client->sock) || client->wantClose)
timeout = 0;
fds[0].events = fds[0].revents = 0;
@@ -922,6 +964,11 @@ static int virNetClientIOEventLoop(virNetClientPtr client,
if (virNetSocketHasCachedData(client->sock))
fds[0].revents |= POLLIN;
+ /* If wantClose flag is set, pretend there was an error on the socket
+ */
+ if (client->wantClose)
+ fds[0].revents = POLLERR;
+
if (fds[1].revents) {
VIR_DEBUG("Woken up from poll by other thread");
if (saferead(client->wakeupReadFD, &ignore, sizeof(ignore)) !=
sizeof(ignore)) {
@@ -1041,6 +1088,8 @@ error:
if (client->waitDispatch) {
VIR_DEBUG("Passing the buck to %p", client->waitDispatch);
virCondSignal(&client->waitDispatch->cond);
+ } else if (client->wantClose) {
+ virNetClientCloseLocked(client);
}
return -1;
}
@@ -1182,7 +1231,8 @@ static int virNetClientIO(virNetClientPtr client,
virResetLastError();
rv = virNetClientIOEventLoop(client, thiscall);
- virNetSocketUpdateIOCallback(client->sock, VIR_EVENT_HANDLE_READABLE);
+ if (client->sock)
+ virNetSocketUpdateIOCallback(client->sock, VIR_EVENT_HANDLE_READABLE);
if (rv == 0 &&
virGetLastError())
@@ -1206,7 +1256,7 @@ void virNetClientIncomingEvent(virNetSocketPtr sock,
goto done;
/* This should be impossible, but it doesn't hurt to check */
- if (client->waitDispatch)
+ if (client->waitDispatch || client->wantClose)
goto done;
VIR_DEBUG("Event fired %p %d", sock, events);
@@ -1251,6 +1301,12 @@ virNetClientSendInternal(virNetClientPtr client,
virNetClientLock(client);
+ if (!client->sock || client->wantClose) {
+ virNetError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Client socket is closed"));
+ goto unlock;
+ }
+
/* We don't need call->cond for non-blocking calls since there's no
* thread to be woken up anyway
*/
@@ -1290,6 +1346,8 @@ cleanup:
} else {
VIR_FREE(call);
}
+
+unlock:
virNetClientUnlock(client);
return ret;
}
--
1.7.6.1