On 09/10/2010 10:00 AM, Daniel P. Berrange wrote:
typedef struct _virLockManagerDriver virLockManagerDriver;
typedef virLockManagerDriver *virLockManagerDriverPtr;
/* Which callbacks are supported */
typedef enum {
VIR_LOCK_MANAGER_DRIVER_RESOURCES = (1<< 0),
VIR_LOCK_MANAGER_DRIVER_MIGRATE = (1<< 0),
Same value?
VIR_LOCK_MANAGER_DRIVER_HOTPLUG = (1<< 1),
};
struct _virLockManagerDriver {
/**
* @version: the newest implemented plugin ABI version
* @flags: the implemented plugin optional extras
*/
unsigned int version;
unsigned int flags;
/**
* load_drv:
* @version: the libvirt requested plugin ABI version
* @flags: the libvirt requested plugin optional extras
*
* Allow the plugin to validate the libvirt requested
* plugin version / flags. This allows it to reject
* use of versions which are too old. A plugin may
* be loaded multiple times, for different libvirt
* drivers
*
* Returns -1 if the requested version/flags were inadequate
*/
int (*load_drv)(unsigned int version,
unsigned int flags);
/**
* unload_drv:
*
* Called to release any resources prior to the plugin
* being unloaded from memory. Returns -1 to prevent
* plugin unloading.
*/
int (*load_drv)(void);
s/load_drv/unload_drv/ or this won't compile. Are these two callbacks
mandatory, or can they be NULL in the case that the driver only supports
exactly what it recorded in version/flags?
/**
* virLockManagerPluginLoad:
* @name: the name of the plugin
*
* Attempt to load the plugin $(libdir)/libvirt/lock-manager/@name.so
* The plugin driver entry point will be resolved& invoked to obtain
* the lock manager driver
Returns NULL on failure, but is there any way to distinguish between
levels of failure (file not found vs. plugin_init failed vs. load_drv
callback failed), since that might be useful in diagnosing the problem?
*/
virLockManagerPluginPtr virLockManagerPluginLoad(const char *name);
No documentation for virLockMAnagerPluginUnload?
int virLockManagerPluginUnload(virLockManagerPluginPtr);
--
Eric Blake eblake@xxxxxxxxxx +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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