NFSD: drop fh argument from alloc_init_deleg

Currently, we pass the fh of the opened file down through several
functions so that alloc_init_deleg can pass it to delegation_blocked.
The filehandle of the open file is available in the nfs4_file however,
so there's no need to pass it in a separate argument.

Drop the argument from alloc_init_deleg, nfs4_open_delegation and
nfs4_set_delegation.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs4state.c

@@ -1131,7 +1131,6 @@ static void block_delegations(struct knfsd_fh *fh)
 
 static struct nfs4_delegation *
 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
-		 struct svc_fh *current_fh,
 		 struct nfs4_clnt_odstate *odstate)
 {
 	struct nfs4_delegation *dp;
@@ -1141,7 +1140,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
 	n = atomic_long_inc_return(&num_delegations);
 	if (n < 0 || n > max_delegations)
 		goto out_dec;
-	if (delegation_blocked(&current_fh->fh_handle))
+	if (delegation_blocked(&fp->fi_fhandle))
 		goto out_dec;
 	dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg));
 	if (dp == NULL)
@@ -5290,7 +5289,7 @@ static int nfsd4_check_conflicting_opens(struct nfs4_client *clp,
 }
 
 static struct nfs4_delegation *
-nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
+nfs4_set_delegation(struct nfs4_client *clp,
 		    struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
 {
 	int status = 0;
@@ -5335,7 +5334,7 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
 		return ERR_PTR(status);
 
 	status = -ENOMEM;
-	dp = alloc_init_deleg(clp, fp, fh, odstate);
+	dp = alloc_init_deleg(clp, fp, odstate);
 	if (!dp)
 		goto out_delegees;
 
@@ -5403,8 +5402,7 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
  * proper support for them.
  */
 static void
-nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
+nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
-			struct nfs4_ol_stateid *stp)
 {
 	struct nfs4_delegation *dp;
 	struct nfs4_openowner *oo = openowner(stp->st_stateowner);
@@ -5436,7 +5434,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
 		default:
 			goto out_no_deleg;
 	}
-	dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
+	dp = nfs4_set_delegation(clp, stp->st_stid.sc_file, stp->st_clnt_odstate);
 	if (IS_ERR(dp))
 		goto out_no_deleg;
 
@@ -5568,7 +5566,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
 	* Attempt to hand out a delegation. No error return, because the
 	* OPEN succeeds even if we fail.
 	*/
-	nfs4_open_delegation(current_fh, open, stp);
+	nfs4_open_delegation(open, stp);
 nodeleg:
 	status = nfs_ok;
 	trace_nfsd_open(&stp->st_stid.sc_stateid);