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Switch over to passing a callback table to QEMU monitor

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With addition of events there will be alot of callbacks.
To avoid having to add many APIs to register callbacks,
provide them all at once in a big table

* src/qemu/qemu_driver.c: Pass in a callback table to QEMU
  monitor code
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h Replace
  the EOF and disk secret callbacks with a callback table
This commit is contained in:
Daniel P. Berrange 2009-10-15 18:56:52 +01:00
parent 3a4f172fdd
commit e9f4c94301
3 changed files with 45 additions and 36 deletions
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10
src/qemu/qemu_driver.c
View File

@ -794,6 +794,11 @@ cleanup:
return ret;
}
static qemuMonitorCallbacks monitorCallbacks = {
.eofNotify = qemuHandleMonitorEOF,
.diskSecretLookup = findVolumeQcowPassphrase,
};
static int
qemuConnectMonitor(virDomainObjPtr vm)
{
@ -806,14 +811,11 @@ qemuConnectMonitor(virDomainObjPtr vm)
if ((priv->mon = qemuMonitorOpen(vm,
priv->monConfig,
priv->monJSON,
qemuHandleMonitorEOF)) == NULL) {
&monitorCallbacks)) == NULL) {
VIR_ERROR(_("Failed to connect monitor for %s\n"), vm->def->name);
return -1;
}
qemuMonitorRegisterDiskSecretLookup(priv->mon,
findVolumeQcowPassphrase);
return 0;
}

34
src/qemu/qemu_monitor.c
View File

@ -51,8 +51,7 @@ struct _qemuMonitor {
virDomainObjPtr vm;
qemuMonitorEOFNotify eofCB;
qemuMonitorDiskSecretLookup secretCB;
qemuMonitorCallbacksPtr cb;
/* If there's a command being processed this will be
* non-NULL */
@ -517,14 +516,15 @@ qemuMonitorIO(int watch, int fd, int events, void *opaque) {
* but is this safe ? I think it is, because the callback
* will try to acquire the virDomainObjPtr mutex next */
if (failed || quit) {
qemuMonitorEOFNotify eofCB = mon->eofCB;
void (*eofNotify)(qemuMonitorPtr, virDomainObjPtr, int)
= mon->cb->eofNotify;
virDomainObjPtr vm = mon->vm;
/* Make sure anyone waiting wakes up now */
virCondSignal(&mon->notify);
if (qemuMonitorUnref(mon) > 0)
qemuMonitorUnlock(mon);
VIR_DEBUG("Triggering EOF callback error? %d", failed);
(eofCB)(mon, vm, failed);
(eofNotify)(mon, vm, failed);
} else {
if (qemuMonitorUnref(mon) > 0)
qemuMonitorUnlock(mon);
@ -536,10 +536,16 @@ qemuMonitorPtr
qemuMonitorOpen(virDomainObjPtr vm,
virDomainChrDefPtr config,
int json,
qemuMonitorEOFNotify eofCB)
qemuMonitorCallbacksPtr cb)
{
qemuMonitorPtr mon;
if (!cb || !cb->eofNotify) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s",
_("EOF notify callback must be supplied"));
return NULL;
}
if (VIR_ALLOC(mon) < 0) {
virReportOOMError(NULL);
return NULL;
@ -561,8 +567,8 @@ qemuMonitorOpen(virDomainObjPtr vm,
mon->fd = -1;
mon->refs = 1;
mon->vm = vm;
mon->eofCB = eofCB;
mon->json = json;
mon->cb = cb;
qemuMonitorLock(mon);
switch (config->type) {
@ -648,13 +654,6 @@ int qemuMonitorClose(qemuMonitorPtr mon)
}
void qemuMonitorRegisterDiskSecretLookup(qemuMonitorPtr mon,
qemuMonitorDiskSecretLookup secretCB)
{
mon->secretCB = secretCB;
}
int qemuMonitorSend(qemuMonitorPtr mon,
qemuMonitorMessagePtr msg)
{
@ -690,10 +689,17 @@ int qemuMonitorGetDiskSecret(qemuMonitorPtr mon,
char **secret,
size_t *secretLen)
{
int ret = -1;
*secret = NULL;
*secretLen = 0;
return mon->secretCB(mon, conn, mon->vm, path, secret, secretLen);
qemuMonitorRef(mon);
qemuMonitorUnlock(mon);
if (mon->cb && mon->cb->diskSecretLookup)
ret = mon->cb->diskSecretLookup(mon, conn, mon->vm, path, secret, secretLen);
qemuMonitorLock(mon);
qemuMonitorUnref(mon);
return ret;
}

37
src/qemu/qemu_monitor.h
View File

@ -59,21 +59,25 @@ struct _qemuMonitorMessage {
void *passwordOpaque;
};
typedef void (*qemuMonitorEOFNotify)(qemuMonitorPtr mon,
virDomainObjPtr vm,
int withError);
typedef struct _qemuMonitorCallbacks qemuMonitorCallbacks;
typedef qemuMonitorCallbacks *qemuMonitorCallbacksPtr;
struct _qemuMonitorCallbacks {
void (*eofNotify)(qemuMonitorPtr mon,
virDomainObjPtr vm,
int withError);
/* XXX we'd really like to avoid virCOnnectPtr here
* It is required so the callback can find the active
* secret driver. Need to change this to work like the
* security drivers do, to avoid this
*/
int (*diskSecretLookup)(qemuMonitorPtr mon,
virConnectPtr conn,
virDomainObjPtr vm,
const char *path,
char **secret,
size_t *secretLen);
};
/* XXX we'd really like to avoid virCOnnectPtr here
* It is required so the callback can find the active
* secret driver. Need to change this to work like the
* security drivers do, to avoid this
*/
typedef int (*qemuMonitorDiskSecretLookup)(qemuMonitorPtr mon,
virConnectPtr conn,
virDomainObjPtr vm,
const char *path,
char **secret,
size_t *secretLen);
char *qemuMonitorEscapeArg(const char *in);
char *qemuMonitorEscapeShell(const char *in);
@ -81,7 +85,7 @@ char *qemuMonitorEscapeShell(const char *in);
qemuMonitorPtr qemuMonitorOpen(virDomainObjPtr vm,
virDomainChrDefPtr config,
int json,
qemuMonitorEOFNotify eofCB);
qemuMonitorCallbacksPtr cb);
int qemuMonitorClose(qemuMonitorPtr mon);
@ -91,9 +95,6 @@ void qemuMonitorUnlock(qemuMonitorPtr mon);
int qemuMonitorRef(qemuMonitorPtr mon);
int qemuMonitorUnref(qemuMonitorPtr mon);
void qemuMonitorRegisterDiskSecretLookup(qemuMonitorPtr mon,
qemuMonitorDiskSecretLookup secretCB);
/* This API is for use by the internal Text/JSON monitor impl code only */
int qemuMonitorSend(qemuMonitorPtr mon,
qemuMonitorMessagePtr msg);