Re: [libvirt] RFC [2/3]: The lock manager plugin driver API

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),

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);

/** * virLockManagerPluginLoad: * @name: the name of the plugin * * Attempt to load the plugin $(libdir)/libvirt/lock-manager/(a)name.so * The plugin driver entry point will be resolved& invoked to obtain * the lock manager driver

*/ virLockManagerPluginPtr virLockManagerPluginLoad(const char *name);

int virLockManagerPluginUnload(virLockManagerPluginPtr);