mirror of
https://github.com/torvalds/linux
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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>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
#ifndef _FS_NFSD_PNFS_H
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#define _FS_NFSD_PNFS_H 1
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#ifdef CONFIG_NFSD_V4
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#include <linux/exportfs.h>
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#include <linux/nfsd/export.h>
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#include "state.h"
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#include "xdr4.h"
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struct xdr_stream;
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struct nfsd4_deviceid_map {
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struct list_head hash;
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u64 idx;
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int fsid_type;
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u32 fsid[];
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};
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struct nfsd4_layout_ops {
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u32 notify_types;
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__be32 (*proc_getdeviceinfo)(struct super_block *sb,
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struct nfs4_client *clp,
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struct nfsd4_getdeviceinfo *gdevp);
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__be32 (*encode_getdeviceinfo)(struct xdr_stream *xdr,
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struct nfsd4_getdeviceinfo *gdevp);
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__be32 (*proc_layoutget)(struct inode *, const struct svc_fh *fhp,
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struct nfsd4_layoutget *lgp);
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__be32 (*encode_layoutget)(struct xdr_stream *,
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struct nfsd4_layoutget *lgp);
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__be32 (*proc_layoutcommit)(struct inode *inode,
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struct nfsd4_layoutcommit *lcp);
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void (*fence_client)(struct nfs4_layout_stateid *ls);
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};
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extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
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#ifdef CONFIG_NFSD_BLOCKLAYOUT
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extern const struct nfsd4_layout_ops bl_layout_ops;
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#endif
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#ifdef CONFIG_NFSD_SCSILAYOUT
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extern const struct nfsd4_layout_ops scsi_layout_ops;
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#endif
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__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
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struct nfsd4_compound_state *cstate, stateid_t *stateid,
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bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
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__be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
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struct nfs4_layout_stateid *ls);
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__be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
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struct nfsd4_compound_state *cstate,
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struct nfsd4_layoutreturn *lrp);
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__be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
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struct nfsd4_compound_state *cstate,
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struct nfsd4_layoutreturn *lrp);
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int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
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u32 device_generation);
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struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
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#endif /* CONFIG_NFSD_V4 */
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#ifdef CONFIG_NFSD_PNFS
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void nfsd4_setup_layout_type(struct svc_export *exp);
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void nfsd4_return_all_client_layouts(struct nfs4_client *);
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void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
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struct nfs4_file *fp);
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int nfsd4_init_pnfs(void);
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void nfsd4_exit_pnfs(void);
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#else
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struct nfs4_client;
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struct nfs4_file;
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static inline void nfsd4_setup_layout_type(struct svc_export *exp)
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{
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}
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static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
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{
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}
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static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
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struct nfs4_file *fp)
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{
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}
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static inline void nfsd4_exit_pnfs(void)
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{
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}
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static inline int nfsd4_init_pnfs(void)
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{
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return 0;
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}
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#endif /* CONFIG_NFSD_PNFS */
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#endif /* _FS_NFSD_PNFS_H */
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