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105 lines
3.4 KiB
105 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* This file describes the layout of the file handles as passed |
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* over the wire. |
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* |
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <[email protected]> |
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*/ |
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#ifndef _UAPI_LINUX_NFSD_FH_H |
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#define _UAPI_LINUX_NFSD_FH_H |
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#include <linux/types.h> |
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#include <linux/nfs.h> |
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#include <linux/nfs2.h> |
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#include <linux/nfs3.h> |
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#include <linux/nfs4.h> |
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/* |
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* This is the old "dentry style" Linux NFSv2 file handle. |
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* |
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* The xino and xdev fields are currently used to transport the |
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* ino/dev of the exported inode. |
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*/ |
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struct nfs_fhbase_old { |
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__u32 fb_dcookie; /* dentry cookie - always 0xfeebbaca */ |
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__u32 fb_ino; /* our inode number */ |
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__u32 fb_dirino; /* dir inode number, 0 for directories */ |
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__u32 fb_dev; /* our device */ |
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__u32 fb_xdev; |
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__u32 fb_xino; |
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__u32 fb_generation; |
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}; |
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/* |
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* This is the new flexible, extensible style NFSv2/v3/v4 file handle. |
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* by Neil Brown <[email protected]> - March 2000 |
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* |
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* The file handle starts with a sequence of four-byte words. |
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* The first word contains a version number (1) and three descriptor bytes |
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* that tell how the remaining 3 variable length fields should be handled. |
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* These three bytes are auth_type, fsid_type and fileid_type. |
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* |
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* All four-byte values are in host-byte-order. |
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* |
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* The auth_type field is deprecated and must be set to 0. |
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* |
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* The fsid_type identifies how the filesystem (or export point) is |
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* encoded. |
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* Current values: |
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* 0 - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number |
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* NOTE: we cannot use the kdev_t device id value, because kdev_t.h |
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* says we mustn't. We must break it up and reassemble. |
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* 1 - 4 byte user specified identifier |
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* 2 - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED |
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* 3 - 4 byte device id, encoded for user-space, 4 byte inode number |
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* 4 - 4 byte inode number and 4 byte uuid |
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* 5 - 8 byte uuid |
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* 6 - 16 byte uuid |
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* 7 - 8 byte inode number and 16 byte uuid |
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* |
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* The fileid_type identified how the file within the filesystem is encoded. |
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* The values for this field are filesystem specific, exccept that |
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* filesystems must not use the values '0' or '0xff'. 'See enum fid_type' |
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* in include/linux/exportfs.h for currently registered values. |
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*/ |
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struct nfs_fhbase_new { |
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__u8 fb_version; /* == 1, even => nfs_fhbase_old */ |
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__u8 fb_auth_type; |
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__u8 fb_fsid_type; |
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__u8 fb_fileid_type; |
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__u32 fb_auth[1]; |
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/* __u32 fb_fsid[0]; floating */ |
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/* __u32 fb_fileid[0]; floating */ |
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}; |
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struct knfsd_fh { |
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unsigned int fh_size; /* significant for NFSv3. |
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* Points to the current size while building |
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* a new file handle |
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*/ |
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union { |
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struct nfs_fhbase_old fh_old; |
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__u32 fh_pad[NFS4_FHSIZE/4]; |
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struct nfs_fhbase_new fh_new; |
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} fh_base; |
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}; |
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#define ofh_dcookie fh_base.fh_old.fb_dcookie |
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#define ofh_ino fh_base.fh_old.fb_ino |
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#define ofh_dirino fh_base.fh_old.fb_dirino |
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#define ofh_dev fh_base.fh_old.fb_dev |
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#define ofh_xdev fh_base.fh_old.fb_xdev |
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#define ofh_xino fh_base.fh_old.fb_xino |
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#define ofh_generation fh_base.fh_old.fb_generation |
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#define fh_version fh_base.fh_new.fb_version |
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#define fh_fsid_type fh_base.fh_new.fb_fsid_type |
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#define fh_auth_type fh_base.fh_new.fb_auth_type |
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#define fh_fileid_type fh_base.fh_new.fb_fileid_type |
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#define fh_fsid fh_base.fh_new.fb_auth |
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/* Do not use, provided for userspace compatiblity. */ |
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#define fh_auth fh_base.fh_new.fb_auth |
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#endif /* _UAPI_LINUX_NFSD_FH_H */
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