diff options
Diffstat (limited to 'fs/nfsd/nfsfh.h')
| -rw-r--r-- | fs/nfsd/nfsfh.h | 97 |
1 files changed, 96 insertions, 1 deletions
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h index 6106697adc04..ad47f16676a8 100644 --- a/fs/nfsd/nfsfh.h +++ b/fs/nfsd/nfsfh.h @@ -10,9 +10,104 @@ #include <linux/crc32.h> #include <linux/sunrpc/svc.h> -#include <uapi/linux/nfsd/nfsfh.h> #include <linux/iversion.h> #include <linux/exportfs.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. + * + * 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 { + union { + struct { + u8 fb_version_aux; /* == 1, even => nfs_fhbase_old */ + u8 fb_auth_type_aux; + u8 fb_fsid_type_aux; + u8 fb_fileid_type_aux; + u32 fb_auth[1]; + /* u32 fb_fsid[0]; floating */ + /* u32 fb_fileid[0]; floating */ + }; + struct { + u8 fb_version; /* == 1, even => nfs_fhbase_old */ + u8 fb_auth_type; + u8 fb_fsid_type; + u8 fb_fileid_type; + u32 fb_auth_flex[]; /* flexible-array member */ + }; + }; +}; + +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_flex static inline __u32 ino_t_to_u32(ino_t ino) { |