include/scsi/pr-manager.h

   1 #ifndef PR_MANAGER_H
   2 #define PR_MANAGER_H
   3
   4 #include "qom/object.h"
   5 #include "qapi/visitor.h"
   6 #include "qom/object_interfaces.h"
   7 #include "block/aio.h"
   8
   9 #define TYPE_PR_MANAGER "pr-manager"
  10
  11 #define PR_MANAGER_CLASS(klass) \
  12      OBJECT_CLASS_CHECK(PRManagerClass, (klass), TYPE_PR_MANAGER)
  13 #define PR_MANAGER_GET_CLASS(obj) \
  14      OBJECT_GET_CLASS(PRManagerClass, (obj), TYPE_PR_MANAGER)
  15 #define PR_MANAGER(obj) \
  16      OBJECT_CHECK(PRManager, (obj), TYPE_PR_MANAGER)
  17
  18 struct sg_io_hdr;
  19
  20 typedef struct PRManager {
  21     /* <private> */
  22     Object parent;
  23 } PRManager;
  24
  25 /**
  26  * PRManagerClass:
  27  * @parent_class: the base class
  28  * @run: callback invoked in thread pool context
  29  */
  30 typedef struct PRManagerClass {
  31     /* <private> */
  32     ObjectClass parent_class;
  33
  34     /* <public> */
  35     int (*run)(PRManager *pr_mgr, int fd, struct sg_io_hdr *hdr);
  36 } PRManagerClass;
  37
  38 BlockAIOCB *pr_manager_execute(PRManager *pr_mgr,
  39                                AioContext *ctx, int fd,
  40                                struct sg_io_hdr *hdr,
  41                                BlockCompletionFunc *complete,
  42                                void *opaque);
  43
  44 #ifdef CONFIG_LINUX
  45 PRManager *pr_manager_lookup(const char *id, Error **errp);
  46 #else
  47 static inline PRManager *pr_manager_lookup(const char *id, Error **errp)
  48 {
  49     /* The classes do not exist at all!  */
  50     error_setg(errp, "No persistent reservation manager with id '%s'", id);
  51     return NULL;
  52 }
  53 #endif
  54
  55 #endif