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Christoph Hellwig8650b8a2015-01-21 11:40:00 +01001#ifndef _NFSD_BLOCKLAYOUTXDR_H
2#define _NFSD_BLOCKLAYOUTXDR_H 1
3
4#include <linux/blkdev.h>
5#include "xdr4.h"
6
7struct iomap;
8struct xdr_stream;
9
10enum 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
17struct 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
26enum 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
39struct 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
50struct 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);
59int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
60 u32 block_size);
61
62#endif /* _NFSD_BLOCKLAYOUTXDR_H */