| 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 | /* 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 | |
| 20 | struct 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 | |
| 28 | struct pnfs_block_range { |
| 29 | u64 foff; |
| 30 | u64 len; |
| 31 | }; |
| 32 | |
| 33 | struct 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 | |
| 44 | struct 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 | |
| 62 | struct 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 */ |
| 77 | |