NFS: Introduce struct nfs_removeargs+nfs_removeres

We need a common structure for setting up an unlink() rpc call in order to
fix the asynchronous unlink code.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index 7fcc78f..c5fce75 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -43,6 +43,7 @@
 #define NFS_entry_sz		(NFS_filename_sz+3)
 
 #define NFS_diropargs_sz	(NFS_fhandle_sz+NFS_filename_sz)
+#define NFS_removeargs_sz	(NFS_fhandle_sz+NFS_filename_sz)
 #define NFS_sattrargs_sz	(NFS_fhandle_sz+NFS_sattr_sz)
 #define NFS_readlinkargs_sz	(NFS_fhandle_sz)
 #define NFS_readargs_sz		(NFS_fhandle_sz+3)
@@ -66,7 +67,7 @@
  * Common NFS XDR functions as inlines
  */
 static inline __be32 *
-xdr_encode_fhandle(__be32 *p, struct nfs_fh *fhandle)
+xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fhandle)
 {
 	memcpy(p, fhandle->data, NFS2_FHSIZE);
 	return p + XDR_QUADLEN(NFS2_FHSIZE);
@@ -204,7 +205,7 @@
 
 /*
  * Encode directory ops argument
- * LOOKUP, REMOVE, RMDIR
+ * LOOKUP, RMDIR
  */
 static int
 nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args)
@@ -216,6 +217,18 @@
 }
 
 /*
+ * Encode REMOVE argument
+ */
+static int
+nfs_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fh);
+	p = xdr_encode_array(p, args->name.name, args->name.len);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
  * Arguments to a READ call. Since we read data directly into the page
  * cache, we also set up the reply iovec here so that iov[1] points
  * exactly to the page we want to fetch.
@@ -705,7 +718,7 @@
     PROC(READ,		readargs,	readres, 3),
     PROC(WRITE,		writeargs,	writeres, 4),
     PROC(CREATE,	createargs,	diropres, 0),
-    PROC(REMOVE,	diropargs,	stat, 0),
+    PROC(REMOVE,	removeargs,	stat, 0),
     PROC(RENAME,	renameargs,	stat, 0),
     PROC(LINK,		linkargs,	stat, 0),
     PROC(SYMLINK,	symlinkargs,	stat, 0),