/usr/include/rados/objclass.h is in rados-objclass-dev 12.2.4-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vim: ts=8 sw=2 smarttab
#ifndef CEPH_OBJCLASS_OBJCLASS_PUBLIC_H
#define CEPH_OBJCLASS_OBJCLASS_PUBLIC_H
#ifdef __cplusplus
#include "buffer.h"
extern "C" {
#endif
#ifndef BUILDING_FOR_EMBEDDED
#define CLS_VER(maj,min) \
int __cls_ver__## maj ## _ ##min = 0; \
int __cls_ver_maj = maj; \
int __cls_ver_min = min;
#define CLS_NAME(name) \
int __cls_name__## name = 0; \
const char *__cls_name = #name;
#define CLS_INIT(name) \
void CEPH_CLS_API __cls_init()
#else
#define CLS_VER(maj,min)
#define CLS_NAME(name)
#define CLS_INIT(name) \
void CEPH_CLS_API name##_cls_init()
#endif
#define CLS_METHOD_RD 0x1 /// method executes read operations
#define CLS_METHOD_WR 0x2 /// method executes write operations
#define CLS_METHOD_PROMOTE 0x8 /// method cannot be proxied to base tier
#define CLS_LOG(level, fmt, ...) \
cls_log(level, "<cls> %s:%d: " fmt, __FILE__, __LINE__, ##__VA_ARGS__)
#define CLS_ERR(fmt, ...) CLS_LOG(0, fmt, ##__VA_ARGS__)
/**
* Initialize a class.
*/
void __cls_init();
/**
* @typdef cls_handle_t
*
* A handle for interacting with the object class.
*/
typedef void *cls_handle_t;
/**
* @typedef cls_method_handle_t
*
* A handle for interacting with the method of the object class.
*/
typedef void *cls_method_handle_t;
/**
* @typedef cls_method_context_t
*
* A context for the method of the object class.
*/
typedef void* cls_method_context_t;
/*class utils*/
extern int cls_log(int level, const char *format, ...)
__attribute__((__format__(printf, 2, 3)));
/* class registration api */
extern int cls_register(const char *name, cls_handle_t *handle);
#ifdef __cplusplus
}
/**
* @typedef cls_method_cxx_call_t
*
*/
typedef int (*cls_method_cxx_call_t)(cls_method_context_t ctx,
class ceph::buffer::list *inbl, class ceph::buffer::list *outbl);
/**
* Register a method.
*
* @param hclass
* @param method
* @param flags
* @param class_call
* @param handle
*/
extern int cls_register_cxx_method(cls_handle_t hclass, const char *method, int flags,
cls_method_cxx_call_t class_call, cls_method_handle_t *handle);
/**
* Create an object.
*
* @param hctx
* @param exclusive
*/
extern int cls_cxx_create(cls_method_context_t hctx, bool exclusive);
/**
* Remove an object.
*
* @param hctx
*/
extern int cls_cxx_remove(cls_method_context_t hctx);
/**
* Check on the status of an object.
*
* @param hctx
* @param size
* @param mtime
*/
extern int cls_cxx_stat(cls_method_context_t hctx, uint64_t *size, time_t *mtime);
/**
* Read contents of an object.
*
* @param hctx
* @param ofs
* @param len
* @param bl
*/
extern int cls_cxx_read(cls_method_context_t hctx, int ofs, int len, ceph::bufferlist *bl);
/**
* Write to the object.
*
* @param hctx
* @param ofs
* @param len
* @param bl
*/
extern int cls_cxx_write(cls_method_context_t hctx, int ofs, int len, ceph::bufferlist *bl);
/**
* Get xattr of the object.
*
* @param hctx
* @param name
* @param outbl
*/
extern int cls_cxx_getxattr(cls_method_context_t hctx, const char *name,
ceph::bufferlist *outbl);
/**
* Set xattr of the object.
*
* @param hctx
* @param name
* @param inbl
*/
extern int cls_cxx_setxattr(cls_method_context_t hctx, const char *name,
ceph::bufferlist *inbl);
/**
* Get value corresponding to a key from the map.
*
* @param hctx
* @param key
* @param outbl
*/
extern int cls_cxx_map_get_val(cls_method_context_t hctx,
const std::string &key, ceph::bufferlist *outbl);
/**
* Set value corresponding to a key in the map.
*
* @param hctx
* @param key
* @param inbl
*/
extern int cls_cxx_map_set_val(cls_method_context_t hctx,
const std::string &key, ceph::bufferlist *inbl);
#endif
#endif
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