64 bit ino support for NFS client

Hi.

Attached is a patch to modify the NFS client code to support
64 bit ino's, as appropriate for the system and the NFS
protocol version.

The code basically just expand the NFS interfaces for routines
which handle ino's from using ino_t to u64 and then uses the
fileid in the nfs_inode instead of i_ino in the inode.  The
code paths that were updated are in the getattr method and
the readdir methods.

This should be no real change on 64 bit platforms.  Since
the ino_t is an unsigned long, it would already be 64 bits
wide.

    Thanx...

           ps
Signed-off-by: Peter Staubach <staubach@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/dir.c

@@ -407,7 +407,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
 	struct file	*file = desc->file;
 	struct nfs_entry *entry = desc->entry;
 	struct dentry	*dentry = NULL;
-	unsigned long	fileid;
+	u64		fileid;
 	int		loop_count = 0,
 			res;
 
@@ -418,7 +418,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
 		unsigned d_type = DT_UNKNOWN;
 		/* Note: entry->prev_cookie contains the cookie for
 		 *	 retrieving the current dirent on the server */
-		fileid = nfs_fileid_to_ino_t(entry->ino);
+		fileid = entry->ino;
 
 		/* Get a dentry if we have one */
 		if (dentry != NULL)
@@ -428,7 +428,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
 		/* Use readdirplus info */
 		if (dentry != NULL && dentry->d_inode != NULL) {
 			d_type = dt_type(dentry->d_inode);
-			fileid = dentry->d_inode->i_ino;
+			fileid = NFS_FILEID(dentry->d_inode);
 		}
 
 		res = filldir(dirent, entry->name, entry->len, 
@@ -1350,9 +1350,9 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry)
 static int nfs_sillyrename(struct inode *dir, struct dentry *dentry)
 {
 	static unsigned int sillycounter;
-	const int      i_inosize  = sizeof(dir->i_ino)*2;
+	const int      fileidsize  = sizeof(NFS_FILEID(dentry->d_inode))*2;
 	const int      countersize = sizeof(sillycounter)*2;
-	const int      slen       = sizeof(".nfs") + i_inosize + countersize - 1;
+	const int      slen        = sizeof(".nfs")+fileidsize+countersize-1;
 	char           silly[slen+1];
 	struct qstr    qsilly;
 	struct dentry *sdentry;
@@ -1370,8 +1370,9 @@ static int nfs_sillyrename(struct inode *dir, struct dentry *dentry)
 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
 		goto out;
 
-	sprintf(silly, ".nfs%*.*lx",
-		i_inosize, i_inosize, dentry->d_inode->i_ino);
+	sprintf(silly, ".nfs%*.*Lx",
+		fileidsize, fileidsize,
+		(unsigned long long)NFS_FILEID(dentry->d_inode));
 
 	/* Return delegation in anticipation of the rename */
 	nfs_inode_return_delegation(dentry->d_inode);

fs/nfs/inode.c

@@ -450,8 +450,10 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 		err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
 	else
 		err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
-	if (!err)
+	if (!err) {
 		generic_fillattr(inode, stat);
+		stat->ino = NFS_FILEID(inode);
+	}
 	return err;
 }
 

fs/nfs/nfs4proc.c

@@ -177,7 +177,7 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent
 		*p++ = xdr_one;                         /* bitmap length */
 		*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 		*p++ = htonl(8);              /* attribute buffer length */
-		p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
+		p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
 	}
 	
 	*p++ = xdr_one;                                  /* next */
@@ -189,7 +189,7 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent
 	*p++ = xdr_one;                         /* bitmap length */
 	*p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 	*p++ = htonl(8);              /* attribute buffer length */
-	p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
+	p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
 
 	readdir->pgbase = (char *)p - (char *)start;
 	readdir->count -= readdir->pgbase;