afs: Increase to 64-bit volume ID and 96-bit vnode ID for YFS

Increase the sizes of the volume ID to 64 bits and the vnode ID (inode
number equivalent) to 96 bits to allow the support of YFS.

This requires the iget comparator to check the vnode->fid rather than i_ino
and i_generation as i_ino is not sufficiently capacious.  It also requires
this data to be placed into the vnode cache key for fscache.

For the moment, just discard the top 32 bits of the vnode ID when returning
it though stat.

Signed-off-by: David Howells <dhowells@redhat.com>

fs/afs/file.c

@@ -121,7 +121,7 @@ int afs_open(struct inode *inode, struct file *file)
 	struct key *key;
 	int ret;
 
-	_enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
+	_enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
 
 	key = afs_request_key(vnode->volume->cell);
 	if (IS_ERR(key)) {
@@ -170,7 +170,7 @@ int afs_release(struct inode *inode, struct file *file)
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 	struct afs_file *af = file->private_data;
 
-	_enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
+	_enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
 
 	if ((file->f_mode & FMODE_WRITE))
 		return vfs_fsync(file, 0);
@@ -228,7 +228,7 @@ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *de
 	struct afs_fs_cursor fc;
 	int ret;
 
-	_enter("%s{%x:%u.%u},%x,,,",
+	_enter("%s{%llx:%llu.%u},%x,,,",
 	       vnode->volume->name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
@@ -634,7 +634,7 @@ static int afs_releasepage(struct page *page, gfp_t gfp_flags)
 	struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
 	unsigned long priv;
 
-	_enter("{{%x:%u}[%lu],%lx},%x",
+	_enter("{{%llx:%llu}[%lu],%lx},%x",
 	       vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
 	       gfp_flags);