linux/fs/ceph/ioctl.h
Sage Weil 8f4e91dee2 ceph: ioctls
A few Ceph ioctls for getting and setting file layout (striping)
parameters, and learning the identity and network address of the OSD a
given region of a file is stored on.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 11:31:14 -07:00

40 lines
1.1 KiB
C

#ifndef FS_CEPH_IOCTL_H
#define FS_CEPH_IOCTL_H
#include <linux/ioctl.h>
#include <linux/types.h>
#define CEPH_IOCTL_MAGIC 0x97
/* just use u64 to align sanely on all archs */
struct ceph_ioctl_layout {
__u64 stripe_unit, stripe_count, object_size;
__u64 data_pool;
};
#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, \
struct ceph_ioctl_layout)
#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, \
struct ceph_ioctl_layout)
/*
* Extract identity, address of the OSD and object storing a given
* file offset.
*/
struct ceph_ioctl_dataloc {
__u64 file_offset; /* in+out: file offset */
__u64 object_offset; /* out: offset in object */
__u64 object_no; /* out: object # */
__u64 object_size; /* out: object size */
char object_name[64]; /* out: object name */
__u64 block_offset; /* out: offset in block */
__u64 block_size; /* out: block length */
__s64 osd; /* out: osd # */
struct sockaddr_storage osd_addr; /* out: osd address */
};
#define CEPH_IOC_GET_DATALOC _IOWR(CEPH_IOCTL_MAGIC, 3, \
struct ceph_ioctl_dataloc)
#endif