63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
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#ifndef _NFSD_BLOCKLAYOUTXDR_H
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#define _NFSD_BLOCKLAYOUTXDR_H 1
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#include <linux/blkdev.h>
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#include "xdr4.h"
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struct iomap;
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struct xdr_stream;
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enum pnfs_block_extent_state {
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PNFS_BLOCK_READWRITE_DATA = 0,
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PNFS_BLOCK_READ_DATA = 1,
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PNFS_BLOCK_INVALID_DATA = 2,
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PNFS_BLOCK_NONE_DATA = 3,
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};
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struct pnfs_block_extent {
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struct nfsd4_deviceid vol_id;
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u64 foff;
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u64 len;
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u64 soff;
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enum pnfs_block_extent_state es;
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};
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#define NFS4_BLOCK_EXTENT_SIZE 44
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enum pnfs_block_volume_type {
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PNFS_BLOCK_VOLUME_SIMPLE = 0,
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PNFS_BLOCK_VOLUME_SLICE = 1,
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PNFS_BLOCK_VOLUME_CONCAT = 2,
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PNFS_BLOCK_VOLUME_STRIPE = 3,
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};
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/*
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* Random upper cap for the uuid length to avoid unbounded allocation.
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* Not actually limited by the protocol.
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*/
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#define PNFS_BLOCK_UUID_LEN 128
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struct pnfs_block_volume {
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enum pnfs_block_volume_type type;
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union {
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struct {
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u64 offset;
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u32 sig_len;
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u8 sig[PNFS_BLOCK_UUID_LEN];
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} simple;
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};
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};
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struct pnfs_block_deviceaddr {
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u32 nr_volumes;
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struct pnfs_block_volume volumes[];
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};
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__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
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struct nfsd4_getdeviceinfo *gdp);
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__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
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struct nfsd4_layoutget *lgp);
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int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
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u32 block_size);
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#endif /* _NFSD_BLOCKLAYOUTXDR_H */
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