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
8 struct iomap;
9 struct xdr_stream;
10
11 struct pnfs_block_extent {
12 struct nfsd4_deviceid vol_id;
13 u64 foff;
14 u64 len;
15 u64 soff;
16 enum pnfs_block_extent_state es;
17 };
18
19 struct pnfs_block_range {
20 u64 foff;
21 u64 len;
22 };
23
24 /*
25 * Random upper cap for the uuid length to avoid unbounded allocation.
26 * Not actually limited by the protocol.
27 */
28 #define PNFS_BLOCK_UUID_LEN 128
29
30 struct pnfs_block_volume {
31 enum pnfs_block_volume_type type;
32 union {
33 struct {
34 u64 offset;
35 u32 sig_len;
36 u8 sig[PNFS_BLOCK_UUID_LEN];
37 } simple;
38 struct {
39 enum scsi_code_set code_set;
40 enum scsi_designator_type designator_type;
41 int designator_len;
42 u8 designator[256];
43 u64 pr_key;
44 } scsi;
45 };
46 };
47
48 struct pnfs_block_deviceaddr {
49 u32 nr_volumes;
50 struct pnfs_block_volume volumes[];
51 };
52
53 __be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
54 const struct nfsd4_getdeviceinfo *gdp);
55 __be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
56 const struct nfsd4_layoutget *lgp);
57 int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
58 u32 block_size);
59 int nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
60 u32 block_size);
61
62 #endif /* _NFSD_BLOCKLAYOUTXDR_H */
63
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