static void
virConsoleShutdown(virConsolePtr con)
{
virErrorPtr err = virGetLastError();
if (con->error.code == VIR_ERR_OK && err)
virCopyLastError(&con->error);
if (con->st) {
virStreamEventRemoveCallback(con->st);
virStreamAbort(con->st);
virStreamFree(con->st);
con->st = NULL;
}
VIR_FREE(con->streamToTerminal.data);
VIR_FREE(con->terminalToStream.data);
if (con->stdinWatch != -1)
virEventRemoveHandle(con->stdinWatch);
if (con->stdoutWatch != -1)
virEventRemoveHandle(con->stdoutWatch);
con->stdinWatch = -1;
con->stdoutWatch = -1;
if (!con->quit) {
con->quit = true;
virCondSignal(&con->cond);
}
}
/**
* virSaveLastError:
*
* Save the last error into a new error object. On success, errno is
* unchanged; on failure, errno is ENOMEM.
*
* Returns a pointer to the copied error or NULL if allocation failed.
* It is the caller's responsibility to free the error with
* virFreeError().
*/
virErrorPtr
virSaveLastError(void)
{
virErrorPtr to;
int saved_errno = errno;
if (VIR_ALLOC_QUIET(to) < 0)
return NULL;
virCopyLastError(to);
errno = saved_errno;
return to;
}
static void
qemuAgentIO(int watch, int fd, int events, void *opaque) {
qemuAgentPtr mon = opaque;
bool error = false;
bool eof = false;
virObjectRef(mon);
/* lock access to the monitor and protect fd */
qemuAgentLock(mon);
#if DEBUG_IO
VIR_DEBUG("Agent %p I/O on watch %d fd %d events %d", mon, watch, fd, events);
#endif
if (mon->fd != fd || mon->watch != watch) {
if (events & (VIR_EVENT_HANDLE_HANGUP | VIR_EVENT_HANDLE_ERROR))
eof = true;
virReportError(VIR_ERR_INTERNAL_ERROR,
_("event from unexpected fd %d!=%d / watch %d!=%d"),
mon->fd, fd, mon->watch, watch);
error = true;
} else if (mon->lastError.code != VIR_ERR_OK) {
if (events & (VIR_EVENT_HANDLE_HANGUP | VIR_EVENT_HANDLE_ERROR))
eof = true;
error = true;
} else {
if (events & VIR_EVENT_HANDLE_WRITABLE) {
if (mon->connectPending) {
if (qemuAgentIOConnect(mon) < 0)
error = true;
} else {
if (qemuAgentIOWrite(mon) < 0)
error = true;
}
events &= ~VIR_EVENT_HANDLE_WRITABLE;
}
if (!error &&
events & VIR_EVENT_HANDLE_READABLE) {
int got = qemuAgentIORead(mon);
events &= ~VIR_EVENT_HANDLE_READABLE;
if (got < 0) {
error = true;
} else if (got == 0) {
eof = true;
} else {
/* Ignore hangup/error events if we read some data, to
* give time for that data to be consumed */
events = 0;
if (qemuAgentIOProcess(mon) < 0)
error = true;
}
}
if (!error &&
events & VIR_EVENT_HANDLE_HANGUP) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("End of file from monitor"));
eof = 1;
events &= ~VIR_EVENT_HANDLE_HANGUP;
}
if (!error && !eof &&
events & VIR_EVENT_HANDLE_ERROR) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Invalid file descriptor while waiting for monitor"));
eof = 1;
events &= ~VIR_EVENT_HANDLE_ERROR;
}
if (!error && events) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unhandled event %d for monitor fd %d"),
events, mon->fd);
error = 1;
}
}
if (error || eof) {
if (mon->lastError.code != VIR_ERR_OK) {
/* Already have an error, so clear any new error */
virResetLastError();
} else {
virErrorPtr err = virGetLastError();
if (!err)
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Error while processing monitor IO"));
virCopyLastError(&mon->lastError);
virResetLastError();
}
VIR_DEBUG("Error on monitor %s", NULLSTR(mon->lastError.message));
/* If IO process resulted in an error & we have a message,
* then wakeup that waiter */
if (mon->msg && !mon->msg->finished) {
mon->msg->finished = 1;
virCondSignal(&mon->notify);
}
}
qemuAgentUpdateWatch(mon);
/* We have to unlock to avoid deadlock against command thread,
* but is this safe ? I think it is, because the callback
* will try to acquire the virDomainObjPtr mutex next */
if (eof) {
void (*eofNotify)(qemuAgentPtr, virDomainObjPtr)
= mon->cb->eofNotify;
virDomainObjPtr vm = mon->vm;
/* Make sure anyone waiting wakes up now */
virCondSignal(&mon->notify);
qemuAgentUnlock(mon);
virObjectUnref(mon);
VIR_DEBUG("Triggering EOF callback");
(eofNotify)(mon, vm);
} else if (error) {
void (*errorNotify)(qemuAgentPtr, virDomainObjPtr)
= mon->cb->errorNotify;
virDomainObjPtr vm = mon->vm;
/* Make sure anyone waiting wakes up now */
virCondSignal(&mon->notify);
qemuAgentUnlock(mon);
virObjectUnref(mon);
VIR_DEBUG("Triggering error callback");
(errorNotify)(mon, vm);
} else {
qemuAgentUnlock(mon);
virObjectUnref(mon);
}
}
