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