Hi all,
We're trying to finalize the API for librados for the 0.25 release.
This is the C API we're looking at.
cheers,
Colin
=================================================================
#ifndef CEPH_LIBRADOS_H
#define CEPH_LIBRADOS_H
#ifdef __cplusplus
extern "C" {
#endif
#include <netinet/in.h>
#include <linux/types.h>
#include <string.h>
#ifndef CEPH_OSD_TMAP_SET
#define CEPH_OSD_TMAP_HDR 'h'
#define CEPH_OSD_TMAP_SET 's'
#define CEPH_OSD_TMAP_RM 'r'
#endif
#define LIBRADOS_VER_MAJOR 0
#define LIBRADOS_VER_MINOR 25
#define LIBRADOS_VER_EXTRA 0
#define LIBRADOS_VERSION(maj, min, extra) ((maj << 16) + (min << 8) + extra)
#define LIBRADOS_VERSION_CODE LIBRADOS_VERSION(LIBRADOS_VER_MAJOR,
LIBRADOS_VER_MINOR, LIBRADOS_VER_EXTRA)
#define LIBRADOS_SUPPORTS_WATCH 1
typedef void *rados_t;
typedef void *rados_pool_t;
typedef void *rados_list_ctx_t;
typedef uint64_t rados_snap_t;
struct rados_pool_stat_t {
uint64_t num_bytes; // in bytes
uint64_t num_kb; // in KB
uint64_t num_objects;
uint64_t num_object_clones;
uint64_t num_object_copies; // num_objects * num_replicas
uint64_t num_objects_missing_on_primary;
uint64_t num_objects_unfound;
uint64_t num_objects_degraded;
uint64_t num_rd, num_rd_kb,num_wr, num_wr_kb;
};
struct rados_statfs_t {
uint64_t kb, kb_used, kb_avail;
uint64_t num_objects;
};
void rados_version(int *major, int *minor, int *extra);
/* initialization */
int rados_create(rados_t *cluster, const char * const id);
/* Connect to the cluster */
int rados_connect(rados_t cluster);
/* destroy the cluster instance */
void rados_destroy(rados_t cluster);
/* Config
*
* Functions for manipulating the Ceph configuration at runtime.
* After changing the Ceph configuration, you should call rados_conf_apply to
* ensure that the changes have been applied.
*/
int rados_conf_read_file(rados_t cluster, const char *path);
/* Sets a configuration value from a string.
* Returns 0 on success, error code otherwise. */
int rados_conf_set(rados_t cluster, const char *option, const char *value);
/* Reopens the log file.
* You must do this after changing the logging configuration.
* It is also good practice to call this from your SIGHUP signal
handler, so that users can send you
* a SIGHUP to reopen the log.
*/
void rados_reopen_log(rados_t cluster);
/* Returns a configuration value as a string.
* If len is positive, that is the maximum number of bytes we'll write into the
* buffer. If len == -1, we'll call malloc() and set *buf.
* Returns 0 on success, error code otherwise. Returns ENAMETOOLONG if the
* buffer is too short. */
int rados_conf_get(rados_t cluster, const char *option, char *buf, int len);
int rados_conf_get_alloc(rados_t cluster, const char *option, char **buf);
/* pools */
int rados_pool_open(rados_t cluster, const char *name, rados_pool_t *pool);
int rados_pool_close(rados_pool_t pool);
int rados_pool_lookup(rados_t cluster, const char *name);
int rados_pool_stat(rados_pool_t pool, struct rados_pool_stat_t *stats);
void rados_snap_set_read(rados_pool_t pool, rados_snap_t snap);
int rados_snap_set_write_context(rados_pool_t pool, rados_snap_t seq,
rados_snap_t *snaps, int num_snaps);
int rados_pool_create(rados_t cluster, const char *name);
int rados_pool_create_with_auid(rados_t cluster, const char *name,
uint64_t auid);
int rados_pool_create_with_crush_rule(rados_t cluster, const char
*name, __u8 crush_rule);
int rados_pool_create_with_all(rados_t cluster, const char *name, uint64_t auid,
__u8 crush_rule);
int rados_pool_delete(rados_pool_t pool);
int rados_pool_set_auid(rados_pool_t pool, uint64_t auid);
/* objects */
int rados_objects_list_open(rados_pool_t pool, rados_list_ctx_t *ctx);
int rados_objects_list_next(rados_list_ctx_t ctx, const char **entry);
void rados_objects_list_close(rados_list_ctx_t ctx);
/* snapshots */
int rados_pool_snap_create(rados_pool_t pool, const char *snapname);
int rados_pool_snap_remove(rados_pool_t pool, const char *snapname);
int rados_pool_snap_rollback_object(rados_pool_t pool, const char *oid,
const char *snapname);
int rados_pool_selfmanaged_snap_create(rados_pool_t pool, uint64_t *snapid);
int rados_pool_selfmanaged_snap_remove(rados_pool_t pool, uint64_t snapid);
int rados_pool_snap_list(rados_pool_t pool, rados_snap_t *snaps, int maxlen);
int rados_pool_snap_lookup(rados_pool_t pool, const char *name,
rados_snap_t *id);
int rados_pool_snap_get_name(rados_pool_t pool, rados_snap_t id, char
*name, int maxlen);
/* sync io */
uint64_t rados_get_last_version(rados_pool_t pool);
int rados_write(rados_pool_t pool, const char *oid, off_t off, const
char *buf, size_t len);
int rados_write_full(rados_pool_t pool, const char *oid, off_t off,
const char *buf, size_t len);
int rados_read(rados_pool_t pool, const char *oid, off_t off, char
*buf, size_t len);
int rados_remove(rados_pool_t pool, const char *oid);
int rados_trunc(rados_pool_t pool, const char *oid, size_t size);
/* attrs */
int rados_getxattr(rados_pool_t pool, const char *o, const char *name,
char *buf, size_t len);
int rados_setxattr(rados_pool_t pool, const char *o, const char *name,
const char *buf, size_t len);
int rados_rmxattr(rados_pool_t pool, const char *o, const char *name);
/* misc */
int rados_stat(rados_pool_t pool, const char *o, uint64_t *psize,
time_t *pmtime);
int rados_tmap_update(rados_pool_t pool, const char *o, const char
*cmdbuf, size_t cmdbuflen);
int rados_exec(rados_pool_t pool, const char *oid, const char *cls,
const char *method,
const char *in_buf, size_t in_len, char *buf, size_t out_len);
/* async io */
typedef void *rados_completion_t;
typedef void (*rados_callback_t)(rados_completion_t cb, void *arg);
int rados_aio_create_completion(void *cb_arg, rados_callback_t
cb_complete, rados_callback_t cb_safe,
rados_completion_t *pc);
int rados_aio_wait_for_complete(rados_completion_t c);
int rados_aio_wait_for_safe(rados_completion_t c);
int rados_aio_is_complete(rados_completion_t c);
int rados_aio_is_safe(rados_completion_t c);
int rados_aio_get_return_value(rados_completion_t c);
uint64_t rados_aio_get_obj_ver(rados_completion_t c);
void rados_aio_release(rados_completion_t c);
int rados_aio_write(rados_pool_t pool, const char *oid,
off_t off, const char *buf, size_t len,
rados_completion_t completion);
int rados_aio_write_full(rados_pool_t pool, const char *oid,
off_t off, const char *buf, size_t len,
rados_completion_t completion);
int rados_aio_read(rados_pool_t pool, const char *oid,
off_t off, char *buf, size_t len,
rados_completion_t completion);
/* watch/notify */
typedef void (*rados_watchcb_t)(uint8_t opcode, uint64_t ver, void *arg);
int rados_watch(rados_pool_t pool, const char *o, uint64_t ver,
uint64_t *handle,
rados_watchcb_t watchcb, void *arg);
int rados_unwatch(rados_pool_t pool, const char *o, uint64_t handle);
int rados_notify(rados_pool_t pool, const char *o, uint64_t ver);
#ifdef __cplusplus
}
#endif
#endif
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