[linux-2.6-block.git] / fs / nfsd / blocklayoutxdr.h

#ifndef _NFSD_BLOCKLAYOUTXDR_H
#define _NFSD_BLOCKLAYOUTXDR_H 1

#include <linux/blkdev.h>
#include "xdr4.h"

struct iomap;
struct xdr_stream;

enum pnfs_block_extent_state {
	PNFS_BLOCK_READWRITE_DATA	= 0,
	PNFS_BLOCK_READ_DATA		= 1,
	PNFS_BLOCK_INVALID_DATA		= 2,
	PNFS_BLOCK_NONE_DATA		= 3,
};

struct pnfs_block_extent {
	struct nfsd4_deviceid		vol_id;
	u64				foff;
	u64				len;
	u64				soff;
	enum pnfs_block_extent_state	es;
};
#define NFS4_BLOCK_EXTENT_SIZE		44

enum pnfs_block_volume_type {
	PNFS_BLOCK_VOLUME_SIMPLE	= 0,
	PNFS_BLOCK_VOLUME_SLICE		= 1,
	PNFS_BLOCK_VOLUME_CONCAT	= 2,
	PNFS_BLOCK_VOLUME_STRIPE	= 3,
};

/*
 * Random upper cap for the uuid length to avoid unbounded allocation.
 * Not actually limited by the protocol.
 */
#define PNFS_BLOCK_UUID_LEN	128

struct pnfs_block_volume {
	enum pnfs_block_volume_type	type;
	union {
		struct {
			u64		offset;
			u32		sig_len;
			u8		sig[PNFS_BLOCK_UUID_LEN];
		} simple;
	};
};

struct pnfs_block_deviceaddr {
	u32				nr_volumes;
	struct pnfs_block_volume	volumes[];
};

__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
		struct nfsd4_getdeviceinfo *gdp);
__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
		struct nfsd4_layoutget *lgp);
int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
		u32 block_size);

#endif /* _NFSD_BLOCKLAYOUTXDR_H */
Commit	Line	Data
8650b8a0 CH	1	#ifndef _NFSD_BLOCKLAYOUTXDR_H
	2	#define _NFSD_BLOCKLAYOUTXDR_H 1
	3
	4	#include <linux/blkdev.h>
	5	#include "xdr4.h"
	6
	7	struct iomap;
	8	struct xdr_stream;
	9
	10	enum pnfs_block_extent_state {
	11	PNFS_BLOCK_READWRITE_DATA = 0,
	12	PNFS_BLOCK_READ_DATA = 1,
	13	PNFS_BLOCK_INVALID_DATA = 2,
	14	PNFS_BLOCK_NONE_DATA = 3,
	15	};
	16
	17	struct pnfs_block_extent {
	18	struct nfsd4_deviceid vol_id;
	19	u64 foff;
	20	u64 len;
	21	u64 soff;
	22	enum pnfs_block_extent_state es;
	23	};
	24	#define NFS4_BLOCK_EXTENT_SIZE 44
	25
	26	enum pnfs_block_volume_type {
	27	PNFS_BLOCK_VOLUME_SIMPLE = 0,
	28	PNFS_BLOCK_VOLUME_SLICE = 1,
	29	PNFS_BLOCK_VOLUME_CONCAT = 2,
	30	PNFS_BLOCK_VOLUME_STRIPE = 3,
	31	};
	32
	33	/*
	34	* Random upper cap for the uuid length to avoid unbounded allocation.
	35	* Not actually limited by the protocol.
	36	*/
	37	#define PNFS_BLOCK_UUID_LEN 128
	38
	39	struct pnfs_block_volume {
	40	enum pnfs_block_volume_type type;
	41	union {
	42	struct {
	43	u64 offset;
	44	u32 sig_len;
	45	u8 sig[PNFS_BLOCK_UUID_LEN];
	46	} simple;
	47	};
	48	};
	49
	50	struct pnfs_block_deviceaddr {
	51	u32 nr_volumes;
	52	struct pnfs_block_volume volumes[];
	53	};
	54
	55	__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
	56	struct nfsd4_getdeviceinfo *gdp);
	57	__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
	58	struct nfsd4_layoutget *lgp);
	59	int nfsd4_block_decode_layoutupdate(__be32 p, u32 len, struct iomap *iomapp,
	60	u32 block_size);
	61
	62	#endif /* _NFSD_BLOCKLAYOUTXDR_H */