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}_I|+ ? /* SPDX-License-Identifier: GPL-2.0 */
#ifndef CEPH_RADOS_H
#define CEPH_RADOS_H
/*
* Data types for the Ceph distributed object storage layer RADOS
* (Reliable Autonomic Distributed Object Store).
*/
#include
/*
* fs id
*/
struct ceph_fsid {
unsigned char fsid[16];
};
static inline int ceph_fsid_compare(const struct ceph_fsid *a,
const struct ceph_fsid *b)
{
return memcmp(a, b, sizeof(*a));
}
/*
* ino, object, etc.
*/
typedef __le64 ceph_snapid_t;
#define CEPH_SNAPDIR ((__u64)(-1)) /* reserved for hidden .snap dir */
#define CEPH_NOSNAP ((__u64)(-2)) /* "head", "live" revision */
#define CEPH_MAXSNAP ((__u64)(-3)) /* largest valid snapid */
struct ceph_timespec {
__le32 tv_sec;
__le32 tv_nsec;
} __attribute__ ((packed));
/*
* object layout - how objects are mapped into PGs
*/
#define CEPH_OBJECT_LAYOUT_HASH 1
#define CEPH_OBJECT_LAYOUT_LINEAR 2
#define CEPH_OBJECT_LAYOUT_HASHINO 3
/*
* pg layout -- how PGs are mapped onto (sets of) OSDs
*/
#define CEPH_PG_LAYOUT_CRUSH 0
#define CEPH_PG_LAYOUT_HASH 1
#define CEPH_PG_LAYOUT_LINEAR 2
#define CEPH_PG_LAYOUT_HYBRID 3
#define CEPH_PG_MAX_SIZE 32 /* max # osds in a single pg */
/*
* placement group.
* we encode this into one __le64.
*/
struct ceph_pg_v1 {
__le16 preferred; /* preferred primary osd */
__le16 ps; /* placement seed */
__le32