NFS: Fix size of NFSACL SETACL operations

When encoding the NFSACL SETACL operation, reserve just the estimated
size of the ACL rather than a fixed maximum. This eliminates needless
zero padding on the wire that the server ignores.

Fixes: ee5dc7732bd5 ('NFS: Fix "kernel BUG at fs/nfs/nfs3xdr.c:1338!"')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 53852a4..9b04c2e 100644 (file)
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -1342,7 +1342,7 @@ static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
        if (args->npages != 0)
                xdr_write_pages(xdr, args->pages, 0, args->len);
        else
-               xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE);
+               xdr_reserve_space(xdr, args->len);
 
        error = nfsacl_encode(xdr->buf, base, args->inode,
                            (args->mask & NFS_ACL) ?