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client rpc: Report proper error for keepalive disconnections

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Whenever a connection was closed due to keepalive timeout, we would log
a warning but the interrupted API would return rather useless generic
error:

    internal error: received hangup / error event on socket

Let's report a proper keepalive timeout error and make sure it is
propagated to all pending APIs. The error should be better now:

    internal error: connection closed due to keepalive timeout

Based on an old patch from Martin Kletzander.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2015-09-11 17:07:56 +02:00
parent 363995b029
commit c91776d5ff
2 changed files with 17 additions and 5 deletions
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10
src/rpc/virkeepalive.c
View File

@ -136,11 +136,11 @@ virKeepAliveTimerInternal(virKeepAlivePtr ka,
ka, ka->client, ka->countToDeath, timeval);
if (ka->countToDeath == 0) {
VIR_WARN("No response from client %p after %d keepalive messages in"
" %d seconds",
ka->client,
ka->count,
timeval);
VIR_DEBUG("No response from client %p after %d keepalive messages "
"in %d seconds",
ka->client, ka->count, timeval);
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("connection closed due to keepalive timeout"));
return true;
} else {
ka->countToDeath--;

12
src/rpc/virnetclient.c
View File

@ -107,6 +107,7 @@ struct _virNetClient {
virKeepAlivePtr keepalive;
bool wantClose;
int closeReason;
virErrorPtr error;
virNetClientCloseFunc closeCb;
void *closeOpaque;
@ -636,10 +637,14 @@ virNetClientMarkClose(virNetClientPtr client,
int reason)
{
VIR_DEBUG("client=%p, reason=%d", client, reason);
if (client->sock)
virNetSocketRemoveIOCallback(client->sock);
/* Don't override reason that's already set. */
if (!client->wantClose) {
if (!client->error)
client->error = virSaveLastError();
client->wantClose = true;
client->closeReason = reason;
}
@ -670,6 +675,9 @@ virNetClientCloseLocked(virNetClientPtr client)
client->keepalive = NULL;
client->wantClose = false;
virFreeError(client->error);
client->error = NULL;
if (ka || client->closeCb) {
virNetClientCloseFunc closeCb = client->closeCb;
void *closeOpaque = client->closeOpaque;
@ -1602,6 +1610,10 @@ static int virNetClientIOEventLoop(virNetClientPtr client,
}
error:
if (client->error) {
VIR_DEBUG("error on socket: %s", client->error->message);
virSetError(client->error);
}
virNetClientCallRemove(&client->waitDispatch, thiscall);
virNetClientIOEventLoopPassTheBuck(client, thiscall);
return -1;