f99d4fbdae
This is a simple extension to the block layout driver to use SCSI persistent reservations for access control and fencing, as well as SCSI VPD pages for device identification. For this we need to pass the nfs4_client to the proc_getdeviceinfo method to generate the reservation key, and add a new fence_client method to allow for fence actions in the layout driver. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
#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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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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/*
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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[];
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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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int nfsd4_scsi_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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