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server_plugin.h
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/* */
#ifndef _SERVER_PLUGIN_H
#define _SERVER_PLUGIN_H
#include "config.h"
#define PLUGIN_VERSION_LISTENER ((double)0.3)
#define PLUGIN_VERSION_BACKEND ((double)0.2)
typedef void * listener_context_t;
typedef void * backend_context_t;
/* These callbacks hand requests off to the
appropriate backend. */
/* Do nothing. Returns 1 (failure) to caller */
typedef int (*fence_null_callback)(const char *vm_name,
void *priv);
/* Turn the VM 'off'. Returns 0 to caller if successful or
nonzero if unsuccessful. */
typedef int (*fence_off_callback)(const char *vm_name, const char *src,
uint32_t seqno, void *priv);
/* Turn the VM 'on'. Returns 0 to caller if successful or
nonzero if unsuccessful. */
typedef int (*fence_on_callback)(const char *vm_name, const char *src,
uint32_t seqno, void *priv);
/* Reboot a VM. Returns 0 to caller if successful or
nonzero if unsuccessful. */
typedef int (*fence_reboot_callback)(const char *vm_name, const char *src,
uint32_t seqno, void *priv);
/* Get status of a VM. Returns 0 to caller if VM is alive or
nonzero if VM is not alive. */
typedef int (*fence_status_callback)(const char *vm_name,
void *priv);
/* Get status of backend. Returns 0 to caller if backend
is responding to requests. */
typedef int (*fence_devstatus_callback)(void *priv);
/* VMs available to fence. Returns 0 to caller if backend
is responding to requests and a host list can be produced */
typedef int (*hostlist_callback)(const char *vm_name, const char *uuid,
int state, void *arg);
typedef int (*fence_hostlist_callback)(hostlist_callback cb,
void *arg, void *priv);
typedef int (*backend_init_fn)(backend_context_t *c,
config_object_t *config);
typedef int (*backend_cleanup_fn)(backend_context_t c);
typedef struct _fence_callbacks {
fence_null_callback null;
fence_off_callback off;
fence_on_callback on;
fence_reboot_callback reboot;
fence_status_callback status;
fence_devstatus_callback devstatus;
fence_hostlist_callback hostlist;
} fence_callbacks_t;
typedef struct backend_plugin {
const char *name;
const char *version;
const fence_callbacks_t *callbacks;
backend_init_fn init;
backend_cleanup_fn cleanup;
} backend_plugin_t;
double backend_plugin_version(void);
const backend_plugin_t * backend_plugin_info(void);
#define BACKEND_VER_SYM backend_plugin_version
#define BACKEND_INFO_SYM backend_plugin_info
#define BACKEND_VER_STR "backend_plugin_version"
#define BACKEND_INFO_STR "backend_plugin_info"
typedef int (*listener_init_fn)(listener_context_t *c,
const fence_callbacks_t *cb,
config_object_t *config,
map_object_t *map,
void *priv);
typedef int (*listener_dispatch_fn)(listener_context_t c,
struct timeval *timeout);
typedef int (*listener_cleanup_fn)(listener_context_t c);
typedef struct listener_plugin {
const char *name;
const char *version;
listener_init_fn init;
listener_dispatch_fn dispatch;
listener_cleanup_fn cleanup;
} listener_plugin_t;
double listener_plugin_version(void);
const listener_plugin_t * listener_plugin_info(void);
#define LISTENER_VER_SYM listener_plugin_version
#define LISTENER_INFO_SYM listener_plugin_info
#define LISTENER_VER_STR "listener_plugin_version"
#define LISTENER_INFO_STR "listener_plugin_info"
typedef enum {
PLUGIN_NONE = 0,
PLUGIN_LISTENER = 1,
PLUGIN_BACKEND = 2
} plugin_type_t;
#ifdef __cplusplus
extern "C" {
#endif
const backend_plugin_t *plugin_find_backend(const char *name);
const listener_plugin_t *plugin_find_listener(const char *name);
void plugin_dump(void);
int plugin_load(const char *filename);
void plugin_unload(void);
int plugin_search(const char *pathname);
#ifdef __cplusplus
}
#endif
#endif

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