Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _NFSD_BLOCKLAYOUTXDR_H
3#define _NFSD_BLOCKLAYOUTXDR_H 1
4
5#include <linux/blkdev.h>
6#include "xdr4.h"
7
8struct iomap;
9struct xdr_stream;
10
11/* On the wire size of the layout4 struct with zero number of extents */
12#define PNFS_BLOCK_LAYOUT4_SIZE \
13 (sizeof(__be32) * 2 + /* offset4 */ \
14 sizeof(__be32) * 2 + /* length4 */ \
15 sizeof(__be32) + /* layoutiomode4 */ \
16 sizeof(__be32) + /* layouttype4 */ \
17 sizeof(__be32) + /* number of bytes */ \
18 sizeof(__be32)) /* number of extents */
19
20struct pnfs_block_extent {
21 struct nfsd4_deviceid vol_id;
22 u64 foff;
23 u64 len;
24 u64 soff;
25 enum pnfs_block_extent_state es;
26};
27
28struct pnfs_block_range {
29 u64 foff;
30 u64 len;
31};
32
33struct pnfs_block_layout {
34 u32 nr_extents;
35 struct pnfs_block_extent extents[] __counted_by(nr_extents);
36};
37
38/*
39 * Random upper cap for the uuid length to avoid unbounded allocation.
40 * Not actually limited by the protocol.
41 */
42#define PNFS_BLOCK_UUID_LEN 128
43
44struct pnfs_block_volume {
45 enum pnfs_block_volume_type type;
46 union {
47 struct {
48 u64 offset;
49 u32 sig_len;
50 u8 sig[PNFS_BLOCK_UUID_LEN];
51 } simple;
52 struct {
53 enum scsi_code_set code_set;
54 enum scsi_designator_type designator_type;
55 int designator_len;
56 u8 designator[256];
57 u64 pr_key;
58 } scsi;
59 };
60};
61
62struct pnfs_block_deviceaddr {
63 u32 nr_volumes;
64 struct pnfs_block_volume volumes[] __counted_by(nr_volumes);
65};
66
67__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
68 const struct nfsd4_getdeviceinfo *gdp);
69__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
70 const struct nfsd4_layoutget *lgp);
71__be32 nfsd4_block_decode_layoutupdate(struct xdr_stream *xdr,
72 struct iomap **iomapp, int *nr_iomapsp, u32 block_size);
73__be32 nfsd4_scsi_decode_layoutupdate(struct xdr_stream *xdr,
74 struct iomap **iomapp, int *nr_iomapsp, u32 block_size);
75
76#endif /* _NFSD_BLOCKLAYOUTXDR_H */