| 1 |
13 |
serginhofr |
/*
|
| 2 |
|
|
* include/linux/nfsd/nfsfh.h
|
| 3 |
|
|
*
|
| 4 |
|
|
* This file describes the layout of the file handles as passed
|
| 5 |
|
|
* over the wire.
|
| 6 |
|
|
*
|
| 7 |
|
|
* Earlier versions of knfsd used to sign file handles using keyed MD5
|
| 8 |
|
|
* or SHA. I've removed this code, because it doesn't give you more
|
| 9 |
|
|
* security than blocking external access to port 2049 on your firewall.
|
| 10 |
|
|
*
|
| 11 |
|
|
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
|
| 12 |
|
|
*/
|
| 13 |
|
|
|
| 14 |
|
|
#ifndef _LINUX_NFSD_FH_H
|
| 15 |
|
|
#define _LINUX_NFSD_FH_H
|
| 16 |
|
|
|
| 17 |
|
|
#include <linux/types.h>
|
| 18 |
|
|
#include <linux/nfs.h>
|
| 19 |
|
|
#include <linux/nfs2.h>
|
| 20 |
|
|
#include <linux/nfs3.h>
|
| 21 |
|
|
#include <linux/nfs4.h>
|
| 22 |
|
|
|
| 23 |
|
|
/*
|
| 24 |
|
|
* This is the old "dentry style" Linux NFSv2 file handle.
|
| 25 |
|
|
*
|
| 26 |
|
|
* The xino and xdev fields are currently used to transport the
|
| 27 |
|
|
* ino/dev of the exported inode.
|
| 28 |
|
|
*/
|
| 29 |
|
|
struct nfs_fhbase_old {
|
| 30 |
|
|
__u32 fb_dcookie; /* dentry cookie - always 0xfeebbaca */
|
| 31 |
|
|
__u32 fb_ino; /* our inode number */
|
| 32 |
|
|
__u32 fb_dirino; /* dir inode number, 0 for directories */
|
| 33 |
|
|
__u32 fb_dev; /* our device */
|
| 34 |
|
|
__u32 fb_xdev;
|
| 35 |
|
|
__u32 fb_xino;
|
| 36 |
|
|
__u32 fb_generation;
|
| 37 |
|
|
};
|
| 38 |
|
|
|
| 39 |
|
|
/*
|
| 40 |
|
|
* This is the new flexible, extensible style NFSv2/v3 file handle.
|
| 41 |
|
|
* by Neil Brown <neilb@cse.unsw.edu.au> - March 2000
|
| 42 |
|
|
*
|
| 43 |
|
|
* The file handle starts with a sequence of four-byte words.
|
| 44 |
|
|
* The first word contains a version number (1) and three descriptor bytes
|
| 45 |
|
|
* that tell how the remaining 3 variable length fields should be handled.
|
| 46 |
|
|
* These three bytes are auth_type, fsid_type and fileid_type.
|
| 47 |
|
|
*
|
| 48 |
|
|
* All four-byte values are in host-byte-order.
|
| 49 |
|
|
*
|
| 50 |
|
|
* The auth_type field specifies how the filehandle can be authenticated
|
| 51 |
|
|
* This might allow a file to be confirmed to be in a writable part of a
|
| 52 |
|
|
* filetree without checking the path from it up to the root.
|
| 53 |
|
|
* Current values:
|
| 54 |
|
|
* 0 - No authentication. fb_auth is 0 bytes long
|
| 55 |
|
|
* Possible future values:
|
| 56 |
|
|
* 1 - 4 bytes taken from MD5 hash of the remainer of the file handle
|
| 57 |
|
|
* prefixed by a secret and with the important export flags.
|
| 58 |
|
|
*
|
| 59 |
|
|
* The fsid_type identifies how the filesystem (or export point) is
|
| 60 |
|
|
* encoded.
|
| 61 |
|
|
* Current values:
|
| 62 |
|
|
* 0 - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
|
| 63 |
|
|
* NOTE: we cannot use the kdev_t device id value, because kdev_t.h
|
| 64 |
|
|
* says we mustn't. We must break it up and reassemble.
|
| 65 |
|
|
* 1 - 4 byte user specified identifier
|
| 66 |
|
|
* 2 - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
|
| 67 |
|
|
* 3 - 4 byte device id, encoded for user-space, 4 byte inode number
|
| 68 |
|
|
* 4 - 4 byte inode number and 4 byte uuid
|
| 69 |
|
|
* 5 - 8 byte uuid
|
| 70 |
|
|
* 6 - 16 byte uuid
|
| 71 |
|
|
* 7 - 8 byte inode number and 16 byte uuid
|
| 72 |
|
|
*
|
| 73 |
|
|
* The fileid_type identified how the file within the filesystem is encoded.
|
| 74 |
|
|
* This is (will be) passed to, and set by, the underlying filesystem if it supports
|
| 75 |
|
|
* filehandle operations. The filesystem must not use the value '0' or '0xff' and may
|
| 76 |
|
|
* only use the values 1 and 2 as defined below:
|
| 77 |
|
|
* Current values:
|
| 78 |
|
|
* 0 - The root, or export point, of the filesystem. fb_fileid is 0 bytes.
|
| 79 |
|
|
* 1 - 32bit inode number, 32 bit generation number.
|
| 80 |
|
|
* 2 - 32bit inode number, 32 bit generation number, 32 bit parent directory inode number.
|
| 81 |
|
|
*
|
| 82 |
|
|
*/
|
| 83 |
|
|
struct nfs_fhbase_new {
|
| 84 |
|
|
__u8 fb_version; /* == 1, even => nfs_fhbase_old */
|
| 85 |
|
|
__u8 fb_auth_type;
|
| 86 |
|
|
__u8 fb_fsid_type;
|
| 87 |
|
|
__u8 fb_fileid_type;
|
| 88 |
|
|
__u32 fb_auth[1];
|
| 89 |
|
|
/* __u32 fb_fsid[0]; floating */
|
| 90 |
|
|
/* __u32 fb_fileid[0]; floating */
|
| 91 |
|
|
};
|
| 92 |
|
|
|
| 93 |
|
|
struct knfsd_fh {
|
| 94 |
|
|
unsigned int fh_size; /* significant for NFSv3.
|
| 95 |
|
|
* Points to the current size while building
|
| 96 |
|
|
* a new file handle
|
| 97 |
|
|
*/
|
| 98 |
|
|
union {
|
| 99 |
|
|
struct nfs_fhbase_old fh_old;
|
| 100 |
|
|
__u32 fh_pad[NFS4_FHSIZE/4];
|
| 101 |
|
|
struct nfs_fhbase_new fh_new;
|
| 102 |
|
|
} fh_base;
|
| 103 |
|
|
};
|
| 104 |
|
|
|
| 105 |
|
|
#define ofh_dcookie fh_base.fh_old.fb_dcookie
|
| 106 |
|
|
#define ofh_ino fh_base.fh_old.fb_ino
|
| 107 |
|
|
#define ofh_dirino fh_base.fh_old.fb_dirino
|
| 108 |
|
|
#define ofh_dev fh_base.fh_old.fb_dev
|
| 109 |
|
|
#define ofh_xdev fh_base.fh_old.fb_xdev
|
| 110 |
|
|
#define ofh_xino fh_base.fh_old.fb_xino
|
| 111 |
|
|
#define ofh_generation fh_base.fh_old.fb_generation
|
| 112 |
|
|
|
| 113 |
|
|
#define fh_version fh_base.fh_new.fb_version
|
| 114 |
|
|
#define fh_fsid_type fh_base.fh_new.fb_fsid_type
|
| 115 |
|
|
#define fh_auth_type fh_base.fh_new.fb_auth_type
|
| 116 |
|
|
#define fh_fileid_type fh_base.fh_new.fb_fileid_type
|
| 117 |
|
|
#define fh_auth fh_base.fh_new.fb_auth
|
| 118 |
|
|
#define fh_fsid fh_base.fh_new.fb_auth
|
| 119 |
|
|
|
| 120 |
|
|
|
| 121 |
|
|
|
| 122 |
|
|
#endif /* _LINUX_NFSD_FH_H */
|
