NFS: Use cached page as buffer for NFS symlink requests

Now that we have a copy of the symlink path in the page cache, we can pass
a struct page down to the XDR routines instead of a string buffer.

Test plan:
Connectathon, all NFS versions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 99926067eca4..3dd413f52da1 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -128,7 +128,7 @@ static int nfs4_stat_to_errno(int);
 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
                                 1 + nfs4_name_maxsz + \
-                                nfs4_path_maxsz + \
+                                1 + \
                                 nfs4_fattr_maxsz)
 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
@@ -673,9 +673,9 @@ static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *c
 
         switch (create->ftype) {
         case NF4LNK:
-                RESERVE_SPACE(4 + create->u.symlink->len);
-                WRITE32(create->u.symlink->len);
-                WRITEMEM(create->u.symlink->name, create->u.symlink->len);
+                RESERVE_SPACE(4);
+                WRITE32(create->u.symlink.len);
+                xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
                 break;
 
         case NF4BLK: case NF4CHR: