diff options
Diffstat (limited to 'include/linux/exportfs.h')
| -rw-r--r-- | include/linux/exportfs.h | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h index 8872fe8392d..06178a1336f 100644 --- a/include/linux/exportfs.h +++ b/include/linux/exportfs.h @@ -7,6 +7,44 @@ struct dentry; struct super_block; struct vfsmount; +/* + * The fileid_type identifies how the file within the filesystem is encoded. + * In theory this is freely set and parsed by the filesystem, but we try to + * stick to conventions so we can share some generic code and don't confuse + * sniffers like ethereal/wireshark. + * + * The filesystem must not use the value '0' or '0xff'. + */ +enum fid_type { + /* + * The root, or export point, of the filesystem. + * (Never actually passed down to the filesystem. + */ + FILEID_ROOT = 0, + + /* + * 32bit inode number, 32 bit generation number. + */ + FILEID_INO32_GEN = 1, + + /* + * 32bit inode number, 32 bit generation number, + * 32 bit parent directory inode number. + */ + FILEID_INO32_GEN_PARENT = 2, +}; + +struct fid { + union { + struct { + u32 ino; + u32 gen; + u32 parent_ino; + u32 parent_gen; + } i32; + __u32 raw[6]; + }; +}; /** * struct export_operations - for nfsd to communicate with file systems @@ -117,9 +155,9 @@ extern struct dentry *find_exported_dentry(struct super_block *sb, void *obj, void *parent, int (*acceptable)(void *context, struct dentry *de), void *context); -extern int exportfs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, - int connectable); -extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, __u32 *fh, +extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, + int *max_len, int connectable); +extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, int fh_len, int fileid_type, int (*acceptable)(void *, struct dentry *), void *context); |