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0cd0d15d47
Add a layout content structure instead of a single extent. The ability to store and encode an array of extents is then used to implement support for multiple extents per LAYOUTGET. Signed-off-by: Sergey Bashirov <sergeybashirov@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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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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/* On the wire size of the layout4 struct with zero number of extents */
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#define PNFS_BLOCK_LAYOUT4_SIZE \
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(sizeof(__be32) * 2 + /* offset4 */ \
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sizeof(__be32) * 2 + /* length4 */ \
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sizeof(__be32) + /* layoutiomode4 */ \
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sizeof(__be32) + /* layouttype4 */ \
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sizeof(__be32) + /* number of bytes */ \
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sizeof(__be32)) /* number of extents */
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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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struct pnfs_block_range {
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u64 foff;
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u64 len;
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};
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struct pnfs_block_layout {
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u32 nr_extents;
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struct pnfs_block_extent extents[] __counted_by(nr_extents);
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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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struct {
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enum scsi_code_set code_set;
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enum scsi_designator_type designator_type;
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int designator_len;
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u8 designator[256];
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u64 pr_key;
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} scsi;
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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[] __counted_by(nr_volumes);
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};
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__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
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const struct nfsd4_getdeviceinfo *gdp);
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__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
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const struct nfsd4_layoutget *lgp);
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__be32 nfsd4_block_decode_layoutupdate(struct xdr_stream *xdr,
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struct iomap **iomapp, int *nr_iomapsp, u32 block_size);
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__be32 nfsd4_scsi_decode_layoutupdate(struct xdr_stream *xdr,
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struct iomap **iomapp, int *nr_iomapsp, u32 block_size);
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#endif /* _NFSD_BLOCKLAYOUTXDR_H */
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