Merge branch 'bugfixes'

fs/nfs/nfs4_fs.h

···
 	struct rpc_cred *newcred = NULL;
 	rpc_authflavor_t flavor;
 
+	if (sp4_mode == NFS_SP4_MACH_CRED_CLEANUP ||
+	    sp4_mode == NFS_SP4_MACH_CRED_PNFS_CLEANUP) {
+		/* Using machine creds for cleanup operations
+		 * is only relevent if the client credentials
+		 * might expire. So don't bother for
+		 * RPC_AUTH_UNIX.  If file was only exported to
+		 * sec=sys, the PUTFH would fail anyway.
+		 */
+		if ((*clntp)->cl_auth->au_flavor == RPC_AUTH_UNIX)
+			return false;
+	}
 	if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
 		spin_lock(&clp->cl_lock);
 		if (clp->cl_machine_cred != NULL)

fs/nfs/pagelist.c

···
 		     const struct nfs_pgio_completion_ops *compl_ops,
 		     const struct nfs_rw_ops *rw_ops,
 		     size_t bsize,
-		     int io_flags,
-		     gfp_t gfp_flags)
+		     int io_flags)
 {
-	struct nfs_pgio_mirror *new;
-	int i;
-
 	desc->pg_moreio = 0;
 	desc->pg_inode = inode;
 	desc->pg_ops = pg_ops;
···
 	desc->pg_mirror_count = 1;
 	desc->pg_mirror_idx = 0;
 
-	if (pg_ops->pg_get_mirror_count) {
-		/* until we have a request, we don't have an lseg and no
-		 * idea how many mirrors there will be */
-		new = kcalloc(NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX,
-			      sizeof(struct nfs_pgio_mirror), gfp_flags);
-		desc->pg_mirrors_dynamic = new;
-		desc->pg_mirrors = new;
-
-		for (i = 0; i < NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX; i++)
-			nfs_pageio_mirror_init(&desc->pg_mirrors[i], bsize);
-	} else {
-		desc->pg_mirrors_dynamic = NULL;
-		desc->pg_mirrors = desc->pg_mirrors_static;
-		nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
-	}
+	desc->pg_mirrors_dynamic = NULL;
+	desc->pg_mirrors = desc->pg_mirrors_static;
+	nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
 }
-EXPORT_SYMBOL_GPL(nfs_pageio_init);
 
 /**
  * nfs_pgio_result - Basic pageio error handling
···
 	return ret;
 }
 
+static struct nfs_pgio_mirror *
+nfs_pageio_alloc_mirrors(struct nfs_pageio_descriptor *desc,
+		unsigned int mirror_count)
+{
+	struct nfs_pgio_mirror *ret;
+	unsigned int i;
+
+	kfree(desc->pg_mirrors_dynamic);
+	desc->pg_mirrors_dynamic = NULL;
+	if (mirror_count == 1)
+		return desc->pg_mirrors_static;
+	ret = kmalloc_array(mirror_count, sizeof(*ret), GFP_NOFS);
+	if (ret != NULL) {
+		for (i = 0; i < mirror_count; i++)
+			nfs_pageio_mirror_init(&ret[i], desc->pg_bsize);
+		desc->pg_mirrors_dynamic = ret;
+	}
+	return ret;
+}
+
 /*
  * nfs_pageio_setup_mirroring - determine if mirroring is to be used
  *				by calling the pg_get_mirror_count op
  */
-static int nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
+static void nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
 				       struct nfs_page *req)
 {
-	int mirror_count = 1;
+	unsigned int mirror_count = 1;
 
-	if (!pgio->pg_ops->pg_get_mirror_count)
-		return 0;
+	if (pgio->pg_ops->pg_get_mirror_count)
+		mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
+	if (mirror_count == pgio->pg_mirror_count || pgio->pg_error < 0)
+		return;
 
-	mirror_count = pgio->pg_ops->pg_get_mirror_count(pgio, req);
+	if (!mirror_count || mirror_count > NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX) {
+		pgio->pg_error = -EINVAL;
+		return;
+	}
 
-	if (pgio->pg_error < 0)
-		return pgio->pg_error;
-
-	if (!mirror_count || mirror_count > NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX)
-		return -EINVAL;
-
-	if (WARN_ON_ONCE(!pgio->pg_mirrors_dynamic))
-		return -EINVAL;
-
+	pgio->pg_mirrors = nfs_pageio_alloc_mirrors(pgio, mirror_count);
+	if (pgio->pg_mirrors == NULL) {
+		pgio->pg_error = -ENOMEM;
+		pgio->pg_mirrors = pgio->pg_mirrors_static;
+		mirror_count = 1;
+	}
 	pgio->pg_mirror_count = mirror_count;
-
-	return 0;
 }
 
 /*

fs/nfs/read.c

···
 		pg_ops = server->pnfs_curr_ld->pg_read_ops;
 #endif
 	nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_read_ops,
-			server->rsize, 0, GFP_KERNEL);
+			server->rsize, 0);
 }
 EXPORT_SYMBOL_GPL(nfs_pageio_init_read);
 

fs/nfs/super.c

···
 			rpc_authflavor_t *server_authlist, unsigned int count)
 {
 	rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
+	bool found_auth_null = false;
 	unsigned int i;
-	int use_auth_null = false;
 
 	/*
 	 * If the sec= mount option is used, the specified flavor or AUTH_NULL
···
 	 * AUTH_NULL has a special meaning when it's in the server list - it
 	 * means that the server will ignore the rpc creds, so any flavor
 	 * can be used but still use the sec= that was specified.
+	 *
+	 * Note also that the MNT procedure in MNTv1 does not return a list
+	 * of supported security flavors. In this case, nfs_mount() fabricates
+	 * a security flavor list containing just AUTH_NULL.
 	 */
 	for (i = 0; i < count; i++) {
 		flavor = server_authlist[i];
···
 			goto out;
 
 		if (flavor == RPC_AUTH_NULL)
-			use_auth_null = true;
+			found_auth_null = true;
 	}
 
-	if (use_auth_null) {
-		flavor = RPC_AUTH_NULL;
+	if (found_auth_null) {
+		flavor = args->auth_info.flavors[0];
 		goto out;
 	}
 

fs/nfs/write.c

···
 		pg_ops = server->pnfs_curr_ld->pg_write_ops;
 #endif
 	nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_write_ops,
-			server->wsize, ioflags, GFP_NOIO);
+			server->wsize, ioflags);
 }
 EXPORT_SYMBOL_GPL(nfs_pageio_init_write);
 

include/linux/nfs_page.h

···
 			     const struct nfs_pgio_completion_ops *compl_ops,
 			     const struct nfs_rw_ops *rw_ops,
 			     size_t bsize,
-			     int how,
-			     gfp_t gfp_flags);
+			     int how);
 extern	int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
 				   struct nfs_page *);
 extern  int nfs_pageio_resend(struct nfs_pageio_descriptor *,

net/sunrpc/clnt.c

···
 	task->tk_status = 0;
 	switch (status) {
 	case -ECONNREFUSED:
+		/* A positive refusal suggests a rebind is needed. */
+		if (RPC_IS_SOFTCONN(task))
+			break;
+		if (clnt->cl_autobind) {
+			rpc_force_rebind(clnt);
+			task->tk_action = call_bind;
+			return;
+		}
 	case -ECONNRESET:
 	case -ECONNABORTED:
 	case -ENETUNREACH: