20 files changed, 539 insertions, 59 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 3b0918ade53c..02c916a55020 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -546,6 +546,8 @@ int nfs_create_rpc_client(struct nfs_client *clp,
 		args.flags |= RPC_CLNT_CREATE_NOPING;
 	if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags))
 		args.flags |= RPC_CLNT_CREATE_REUSEPORT;
+	if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags))
+		args.flags |= RPC_CLNT_CREATE_NETUNREACH_FATAL;
 
 	if (!IS_ERR(clp->cl_rpcclient))
 		return 0;
@@ -709,6 +711,9 @@ static int nfs_init_server(struct nfs_server *server,
 	if (ctx->flags & NFS_MOUNT_NORESVPORT)
 		set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
 
+	if (ctx->flags & NFS_MOUNT_NETUNREACH_FATAL)
+		__set_bit(NFS_CS_NETUNREACH_FATAL, &cl_init.init_flags);
+
 	/* Allocate or find a client reference we can use */
 	clp = nfs_get_client(&cl_init);
 	if (IS_ERR(clp))
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 4db912f56230..8bdbc4dca89c 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -79,6 +79,7 @@ static void nfs_mark_return_delegation(struct nfs_server *server,
 				       struct nfs_delegation *delegation)
 {
 	set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
+	set_bit(NFS4SERV_DELEGRETURN, &server->delegation_flags);
 	set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state);
 }
 
@@ -306,7 +307,8 @@ nfs_start_delegation_return_locked(struct nfs_inode *nfsi)
 	if (delegation == NULL)
 		goto out;
 	spin_lock(&delegation->lock);
-	if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {
+	if (delegation->inode &&
+	    !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {
 		clear_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags);
 		/* Refcount matched in nfs_end_delegation_return() */
 		ret = nfs_get_delegation(delegation);
@@ -330,14 +332,16 @@ nfs_start_delegation_return(struct nfs_inode *nfsi)
 }
 
 static void nfs_abort_delegation_return(struct nfs_delegation *delegation,
-					struct nfs_client *clp, int err)
+					struct nfs_server *server, int err)
 {
-
 	spin_lock(&delegation->lock);
 	clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
 	if (err == -EAGAIN) {
 		set_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags);
-		set_bit(NFS4CLNT_DELEGRETURN_DELAYED, &clp->cl_state);
+		set_bit(NFS4SERV_DELEGRETURN_DELAYED,
+			&server->delegation_flags);
+		set_bit(NFS4CLNT_DELEGRETURN_DELAYED,
+			&server->nfs_client->cl_state);
 	}
 	spin_unlock(&delegation->lock);
 }
@@ -547,7 +551,7 @@ out:
  */
 static int nfs_end_delegation_return(struct inode *inode, struct nfs_delegation *delegation, int issync)
 {
-	struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
+	struct nfs_server *server = NFS_SERVER(inode);
 	unsigned int mode = O_WRONLY | O_RDWR;
 	int err = 0;
 
@@ -569,11 +573,11 @@ static int nfs_end_delegation_return(struct inode *inode, struct nfs_delegation
 		/*
 		 * Guard against state recovery
 		 */
-		err = nfs4_wait_clnt_recover(clp);
+		err = nfs4_wait_clnt_recover(server->nfs_client);
 	}
 
 	if (err) {
-		nfs_abort_delegation_return(delegation, clp, err);
+		nfs_abort_delegation_return(delegation, server, err);
 		goto out;
 	}
 
@@ -590,17 +594,6 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation)
 
 	if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags))
 		ret = true;
-	else if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) {
-		struct inode *inode;
-
-		spin_lock(&delegation->lock);
-		inode = delegation->inode;
-		if (inode && list_empty(&NFS_I(inode)->open_files))
-			ret = true;
-		spin_unlock(&delegation->lock);
-	}
-	if (ret)
-		clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags);
 	if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags) ||
 	    test_bit(NFS_DELEGATION_RETURN_DELAYED, &delegation->flags) ||
 	    test_bit(NFS_DELEGATION_REVOKED, &delegation->flags))
@@ -619,6 +612,9 @@ static int nfs_server_return_marked_delegations(struct nfs_server *server,
 	struct nfs_delegation *place_holder_deleg = NULL;
 	int err = 0;
 
+	if (!test_and_clear_bit(NFS4SERV_DELEGRETURN,
+				&server->delegation_flags))
+		return 0;
 restart:
 	/*
 	 * To avoid quadratic looping we hold a reference
@@ -670,6 +666,7 @@ restart:
 		cond_resched();
 		if (!err)
 			goto restart;
+		set_bit(NFS4SERV_DELEGRETURN, &server->delegation_flags);
 		set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state);
 		goto out;
 	}
@@ -684,6 +681,9 @@ static bool nfs_server_clear_delayed_delegations(struct nfs_server *server)
 	struct nfs_delegation *d;
 	bool ret = false;
 
+	if (!test_and_clear_bit(NFS4SERV_DELEGRETURN_DELAYED,
+				&server->delegation_flags))
+		goto out;
 	list_for_each_entry_rcu (d, &server->delegations, super_list) {
 		if (!test_bit(NFS_DELEGATION_RETURN_DELAYED, &d->flags))
 			continue;
@@ -691,6 +691,7 @@ static bool nfs_server_clear_delayed_delegations(struct nfs_server *server)
 		clear_bit(NFS_DELEGATION_RETURN_DELAYED, &d->flags);
 		ret = true;
 	}
+out:
 	return ret;
 }
 
@@ -878,11 +879,25 @@ int nfs4_inode_make_writeable(struct inode *inode)
 	return nfs4_inode_return_delegation(inode);
 }
 
-static void nfs_mark_return_if_closed_delegation(struct nfs_server *server,
-		struct nfs_delegation *delegation)
+static void
+nfs_mark_return_if_closed_delegation(struct nfs_server *server,
+				     struct nfs_delegation *delegation)
 {
-	set_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags);
-	set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state);
+	struct inode *inode;
+
+	if (test_bit(NFS_DELEGATION_RETURN, &delegation->flags) ||
+	    test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags))
+		return;
+	spin_lock(&delegation->lock);
+	inode = delegation->inode;
+	if (!inode)
+		goto out;
+	if (list_empty(&NFS_I(inode)->open_files))
+		nfs_mark_return_delegation(server, delegation);
+	else
+		set_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags);
+out:
+	spin_unlock(&delegation->lock);
 }
 
 static bool nfs_server_mark_return_all_delegations(struct nfs_server *server)
@@ -1276,6 +1291,7 @@ static void nfs_mark_test_expired_delegation(struct nfs_server *server,
 		return;
 	clear_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags);
 	set_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags);
+	set_bit(NFS4SERV_DELEGATION_EXPIRED, &server->delegation_flags);
 	set_bit(NFS4CLNT_DELEGATION_EXPIRED, &server->nfs_client->cl_state);
 }
 
@@ -1354,6 +1370,9 @@ static int nfs_server_reap_expired_delegations(struct nfs_server *server,
 	nfs4_stateid stateid;
 	unsigned long gen = ++server->delegation_gen;
 
+	if (!test_and_clear_bit(NFS4SERV_DELEGATION_EXPIRED,
+				&server->delegation_flags))
+		return 0;
 restart:
 	rcu_read_lock();
 	list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
@@ -1383,6 +1402,9 @@ restart:
 			goto restart;
 		}
 		nfs_inode_mark_test_expired_delegation(server,inode);
+		set_bit(NFS4SERV_DELEGATION_EXPIRED, &server->delegation_flags);
+		set_bit(NFS4CLNT_DELEGATION_EXPIRED,
+			&server->nfs_client->cl_state);
 		iput(inode);
 		return -EAGAIN;
 	}
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index bc957487f6ec..bd23fc736b39 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -666,6 +666,8 @@ static bool nfs_use_readdirplus(struct inode *dir, struct dir_context *ctx,
 {
 	if (!nfs_server_capable(dir, NFS_CAP_READDIRPLUS))
 		return false;
+	if (NFS_SERVER(dir)->flags & NFS_MOUNT_FORCE_RDIRPLUS)
+		return true;
 	if (ctx->pos == 0 ||
 	    cache_hits + cache_misses > NFS_READDIR_CACHE_USAGE_THRESHOLD)
 		return true;
diff --git a/fs/nfs/export.c b/fs/nfs/export.c
index be686b8e0c54..e9c233b6fd20 100644
--- a/fs/nfs/export.c
+++ b/fs/nfs/export.c
@@ -154,5 +154,6 @@ const struct export_operations nfs_export_ops = {
 		 EXPORT_OP_CLOSE_BEFORE_UNLINK	|
 		 EXPORT_OP_REMOTE_FS		|
 		 EXPORT_OP_NOATOMIC_ATTR	|
-		 EXPORT_OP_FLUSH_ON_CLOSE,
+		 EXPORT_OP_FLUSH_ON_CLOSE	|
+		 EXPORT_OP_NOLOCKS,
 };
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 98b45b636be3..61ad269c825f 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1154,10 +1154,14 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
 		rpc_wake_up(&tbl->slot_tbl_waitq);
 		goto reset;
 	/* RPC connection errors */
+	case -ENETDOWN:
+	case -ENETUNREACH:
+		if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags))
+			return -NFS4ERR_FATAL_IOERROR;
+		fallthrough;
 	case -ECONNREFUSED:
 	case -EHOSTDOWN:
 	case -EHOSTUNREACH:
-	case -ENETUNREACH:
 	case -EIO:
 	case -ETIMEDOUT:
 	case -EPIPE:
@@ -1183,6 +1187,7 @@ reset:
 
 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
 static int ff_layout_async_handle_error_v3(struct rpc_task *task,
+					   struct nfs_client *clp,
 					   struct pnfs_layout_segment *lseg,
 					   u32 idx)
 {
@@ -1200,6 +1205,11 @@ static int ff_layout_async_handle_error_v3(struct rpc_task *task,
 	case -EJUKEBOX:
 		nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
 		goto out_retry;
+	case -ENETDOWN:
+	case -ENETUNREACH:
+		if (test_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags))
+			return -NFS4ERR_FATAL_IOERROR;
+		fallthrough;
 	default:
 		dprintk("%s DS connection error %d\n", __func__,
 			task->tk_status);
@@ -1234,7 +1244,7 @@ static int ff_layout_async_handle_error(struct rpc_task *task,
 
 	switch (vers) {
 	case 3:
-		return ff_layout_async_handle_error_v3(task, lseg, idx);
+		return ff_layout_async_handle_error_v3(task, clp, lseg, idx);
 	case 4:
 		return ff_layout_async_handle_error_v4(task, state, clp,
 						       lseg, idx);
@@ -1264,6 +1274,7 @@ static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
 		case -ECONNRESET:
 		case -EHOSTDOWN:
 		case -EHOSTUNREACH:
+		case -ENETDOWN:
 		case -ENETUNREACH:
 		case -EADDRINUSE:
 		case -ENOBUFS:
@@ -1337,6 +1348,9 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
 		return task->tk_status;
 	case -EAGAIN:
 		goto out_eagain;
+	case -NFS4ERR_FATAL_IOERROR:
+		task->tk_status = -EIO;
+		return 0;
 	}
 
 	return 0;
@@ -1507,6 +1521,9 @@ static int ff_layout_write_done_cb(struct rpc_task *task,
 		return task->tk_status;
 	case -EAGAIN:
 		return -EAGAIN;
+	case -NFS4ERR_FATAL_IOERROR:
+		task->tk_status = -EIO;
+		return 0;
 	}
 
 	if (hdr->res.verf->committed == NFS_FILE_SYNC ||
@@ -1551,6 +1568,9 @@ static int ff_layout_commit_done_cb(struct rpc_task *task,
 	case -EAGAIN:
 		rpc_restart_call_prepare(task);
 		return -EAGAIN;
+	case -NFS4ERR_FATAL_IOERROR:
+		task->tk_status = -EIO;
+		return 0;
 	}
 
 	ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
index b069385eea17..13f71ca8c974 100644
--- a/fs/nfs/fs_context.c
+++ b/fs/nfs/fs_context.c
@@ -50,6 +50,7 @@ enum nfs_param {
 	Opt_clientaddr,
 	Opt_cto,
 	Opt_alignwrite,
+	Opt_fatal_neterrors,
 	Opt_fg,
 	Opt_fscache,
 	Opt_fscache_flag,
@@ -72,6 +73,8 @@ enum nfs_param {
 	Opt_posix,
 	Opt_proto,
 	Opt_rdirplus,
+	Opt_rdirplus_none,
+	Opt_rdirplus_force,
 	Opt_rdma,
 	Opt_resvport,
 	Opt_retrans,
@@ -96,6 +99,20 @@ enum nfs_param {
 };
 
 enum {
+	Opt_fatal_neterrors_default,
+	Opt_fatal_neterrors_enetunreach,
+	Opt_fatal_neterrors_none,
+};
+
+static const struct constant_table nfs_param_enums_fatal_neterrors[] = {
+	{ "default",			Opt_fatal_neterrors_default },
+	{ "ENETDOWN:ENETUNREACH",	Opt_fatal_neterrors_enetunreach },
+	{ "ENETUNREACH:ENETDOWN",	Opt_fatal_neterrors_enetunreach },
+	{ "none",			Opt_fatal_neterrors_none },
+	{}
+};
+
+enum {
 	Opt_local_lock_all,
 	Opt_local_lock_flock,
 	Opt_local_lock_none,
@@ -151,6 +168,8 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = {
 	fsparam_string("clientaddr",	Opt_clientaddr),
 	fsparam_flag_no("cto",		Opt_cto),
 	fsparam_flag_no("alignwrite",	Opt_alignwrite),
+	fsparam_enum("fatal_neterrors", Opt_fatal_neterrors,
+		     nfs_param_enums_fatal_neterrors),
 	fsparam_flag  ("fg",		Opt_fg),
 	fsparam_flag_no("fsc",		Opt_fscache_flag),
 	fsparam_string("fsc",		Opt_fscache),
@@ -174,7 +193,8 @@ static const struct fs_parameter_spec nfs_fs_parameters[] = {
 	fsparam_u32   ("port",		Opt_port),
 	fsparam_flag_no("posix",	Opt_posix),
 	fsparam_string("proto",		Opt_proto),
-	fsparam_flag_no("rdirplus",	Opt_rdirplus),
+	fsparam_flag_no("rdirplus", Opt_rdirplus), // rdirplus|nordirplus
+	fsparam_string("rdirplus",  Opt_rdirplus), // rdirplus=...
 	fsparam_flag  ("rdma",		Opt_rdma),
 	fsparam_flag_no("resvport",	Opt_resvport),
 	fsparam_u32   ("retrans",	Opt_retrans),
@@ -288,6 +308,12 @@ static const struct constant_table nfs_xprtsec_policies[] = {
 	{}
 };
 
+static const struct constant_table nfs_rdirplus_tokens[] = {
+	{ "none",	Opt_rdirplus_none },
+	{ "force",	Opt_rdirplus_force },
+	{}
+};
+
 /*
  * Sanity-check a server address provided by the mount command.
  *
@@ -636,10 +662,25 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 			ctx->flags &= ~NFS_MOUNT_NOACL;
 		break;
 	case Opt_rdirplus:
-		if (result.negated)
+		if (result.negated) {
+			ctx->flags &= ~NFS_MOUNT_FORCE_RDIRPLUS;
 			ctx->flags |= NFS_MOUNT_NORDIRPLUS;
-		else
-			ctx->flags &= ~NFS_MOUNT_NORDIRPLUS;
+		} else if (!param->string) {
+			ctx->flags &= ~(NFS_MOUNT_NORDIRPLUS | NFS_MOUNT_FORCE_RDIRPLUS);
+		} else {
+			switch (lookup_constant(nfs_rdirplus_tokens, param->string, -1)) {
+			case Opt_rdirplus_none:
+				ctx->flags &= ~NFS_MOUNT_FORCE_RDIRPLUS;
+				ctx->flags |= NFS_MOUNT_NORDIRPLUS;
+				break;
+			case Opt_rdirplus_force:
+				ctx->flags &= ~NFS_MOUNT_NORDIRPLUS;
+				ctx->flags |= NFS_MOUNT_FORCE_RDIRPLUS;
+				break;
+			default:
+				goto out_invalid_value;
+			}
+		}
 		break;
 	case Opt_sharecache:
 		if (result.negated)
@@ -872,6 +913,25 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 			goto out_of_bounds;
 		ctx->nfs_server.max_connect = result.uint_32;
 		break;
+	case Opt_fatal_neterrors:
+		trace_nfs_mount_assign(param->key, param->string);
+		switch (result.uint_32) {
+		case Opt_fatal_neterrors_default:
+			if (fc->net_ns != &init_net)
+				ctx->flags |= NFS_MOUNT_NETUNREACH_FATAL;
+			else
+				ctx->flags &= ~NFS_MOUNT_NETUNREACH_FATAL;
+			break;
+		case Opt_fatal_neterrors_enetunreach:
+			ctx->flags |= NFS_MOUNT_NETUNREACH_FATAL;
+			break;
+		case Opt_fatal_neterrors_none:
+			ctx->flags &= ~NFS_MOUNT_NETUNREACH_FATAL;
+			break;
+		default:
+			goto out_invalid_value;
+		}
+		break;
 	case Opt_lookupcache:
 		trace_nfs_mount_assign(param->key, param->string);
 		switch (result.uint_32) {
@@ -1651,6 +1711,9 @@ static int nfs_init_fs_context(struct fs_context *fc)
 		ctx->xprtsec.cert_serial	= TLS_NO_CERT;
 		ctx->xprtsec.privkey_serial	= TLS_NO_PRIVKEY;
 
+		if (fc->net_ns != &init_net)
+			ctx->flags |= NFS_MOUNT_NETUNREACH_FATAL;
+
 		fc->s_iflags		|= SB_I_STABLE_WRITES;
 	}
 	fc->fs_private = ctx;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 1aa67fca69b2..119e447758b9 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -74,6 +74,8 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
 
 int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
 {
+	if (unlikely(nfs_current_task_exiting()))
+		return -EINTR;
 	schedule();
 	if (signal_pending_state(mode, current))
 		return -ERESTARTSYS;
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 1ac1d3eec517..ec8d32d0e2e9 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -912,6 +912,11 @@ static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
 }
 #endif
 
+static inline bool nfs_current_task_exiting(void)
+{
+	return (current->flags & PF_EXITING) != 0;
+}
+
 static inline bool nfs_error_is_fatal(int err)
 {
 	switch (err) {
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
index b0c8a39c2bbd..0d7310c1ee0c 100644
--- a/fs/nfs/nfs3client.c
+++ b/fs/nfs/nfs3client.c
@@ -120,6 +120,8 @@ struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
 
 	if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
 		__set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
+	if (test_bit(NFS_CS_NETUNREACH_FATAL, &mds_clp->cl_flags))
+		__set_bit(NFS_CS_NETUNREACH_FATAL, &cl_init.init_flags);
 
 	__set_bit(NFS_CS_DS, &cl_init.init_flags);
 
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 755ed3c37051..a4cb67573aa7 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -39,7 +39,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
 		__set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 		schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
 		res = -ERESTARTSYS;
-	} while (!fatal_signal_pending(current));
+	} while (!fatal_signal_pending(current) && !nfs_current_task_exiting());
 	return res;
 }
 
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 1924c4a2077b..5cf52ece96ac 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -21,6 +21,8 @@
 
 #define NFSDBG_FACILITY NFSDBG_PROC
 static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std);
+static int nfs42_proc_offload_status(struct file *file, nfs4_stateid *stateid,
+				     u64 *copied);
 
 static void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr *naddr)
 {
@@ -173,6 +175,20 @@ int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
 	return err;
 }
 
+static void nfs4_copy_dequeue_callback(struct nfs_server *dst_server,
+				       struct nfs_server *src_server,
+				       struct nfs4_copy_state *copy)
+{
+	spin_lock(&dst_server->nfs_client->cl_lock);
+	list_del_init(&copy->copies);
+	spin_unlock(&dst_server->nfs_client->cl_lock);
+	if (dst_server != src_server) {
+		spin_lock(&src_server->nfs_client->cl_lock);
+		list_del_init(&copy->src_copies);
+		spin_unlock(&src_server->nfs_client->cl_lock);
+	}
+}
+
 static int handle_async_copy(struct nfs42_copy_res *res,
 			     struct nfs_server *dst_server,
 			     struct nfs_server *src_server,
@@ -182,9 +198,12 @@ static int handle_async_copy(struct nfs42_copy_res *res,
 			     bool *restart)
 {
 	struct nfs4_copy_state *copy, *tmp_copy = NULL, *iter;
-	int status = NFS4_OK;
 	struct nfs_open_context *dst_ctx = nfs_file_open_context(dst);
 	struct nfs_open_context *src_ctx = nfs_file_open_context(src);
+	struct nfs_client *clp = dst_server->nfs_client;
+	unsigned long timeout = 3 * HZ;
+	int status = NFS4_OK;
+	u64 copied;
 
 	copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL);
 	if (!copy)
@@ -222,15 +241,12 @@ static int handle_async_copy(struct nfs42_copy_res *res,
 		spin_unlock(&src_server->nfs_client->cl_lock);
 	}
 
-	status = wait_for_completion_interruptible(&copy->completion);
-	spin_lock(&dst_server->nfs_client->cl_lock);
-	list_del_init(&copy->copies);
-	spin_unlock(&dst_server->nfs_client->cl_lock);
-	if (dst_server != src_server) {
-		spin_lock(&src_server->nfs_client->cl_lock);
-		list_del_init(&copy->src_copies);
-		spin_unlock(&src_server->nfs_client->cl_lock);
-	}
+wait:
+	status = wait_for_completion_interruptible_timeout(&copy->completion,
+							   timeout);
+	if (!status)
+		goto timeout;
+	nfs4_copy_dequeue_callback(dst_server, src_server, copy);
 	if (status == -ERESTARTSYS) {
 		goto out_cancel;
 	} else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) {
@@ -240,6 +256,7 @@ static int handle_async_copy(struct nfs42_copy_res *res,
 	}
 out:
 	res->write_res.count = copy->count;
+	/* Copy out the updated write verifier provided by CB_OFFLOAD. */
 	memcpy(&res->write_res.verifier, &copy->verf, sizeof(copy->verf));
 	status = -copy->error;
 
@@ -251,6 +268,39 @@ out_cancel:
 	if (!nfs42_files_from_same_server(src, dst))
 		nfs42_do_offload_cancel_async(src, src_stateid);
 	goto out_free;
+timeout:
+	timeout <<= 1;
+	if (timeout > (clp->cl_lease_time >> 1))
+		timeout = clp->cl_lease_time >> 1;
+	status = nfs42_proc_offload_status(dst, &copy->stateid, &copied);
+	if (status == -EINPROGRESS)
+		goto wait;
+	nfs4_copy_dequeue_callback(dst_server, src_server, copy);
+	switch (status) {
+	case 0:
+		/* The server recognized the copy stateid, so it hasn't
+		 * rebooted. Don't overwrite the verifier returned in the
+		 * COPY result. */
+		res->write_res.count = copied;
+		goto out_free;
+	case -EREMOTEIO:
+		/* COPY operation failed on the server. */
+		status = -EOPNOTSUPP;
+		res->write_res.count = copied;
+		goto out_free;
+	case -EBADF:
+		/* Server did not recognize the copy stateid. It has
+		 * probably restarted and lost the plot. */
+		res->write_res.count = 0;
+		status = -EOPNOTSUPP;
+		break;
+	case -EOPNOTSUPP:
+		/* RFC 7862 REQUIREs server to support OFFLOAD_STATUS when
+		 * it has signed up for an async COPY, so server is not
+		 * spec-compliant. */
+		res->write_res.count = 0;
+	}
+	goto out_free;
 }
 
 static int process_copy_commit(struct file *dst, loff_t pos_dst,
@@ -582,6 +632,108 @@ static int nfs42_do_offload_cancel_async(struct file *dst,
 	return status;
 }
 
+static int
+_nfs42_proc_offload_status(struct nfs_server *server, struct file *file,
+			   struct nfs42_offload_data *data)
+{
+	struct nfs_open_context *ctx = nfs_file_open_context(file);
+	struct rpc_message msg = {
+		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_STATUS],
+		.rpc_argp	= &data->args,
+		.rpc_resp	= &data->res,
+		.rpc_cred	= ctx->cred,
+	};
+	int status;
+
+	status = nfs4_call_sync(server->client, server, &msg,
+				&data->args.osa_seq_args,
+				&data->res.osr_seq_res, 1);
+	trace_nfs4_offload_status(&data->args, status);
+	switch (status) {
+	case 0:
+		break;
+
+	case -NFS4ERR_ADMIN_REVOKED:
+	case -NFS4ERR_BAD_STATEID:
+	case -NFS4ERR_OLD_STATEID:
+		/*
+		 * Server does not recognize the COPY stateid. CB_OFFLOAD
+		 * could have purged it, or server might have rebooted.
+		 * Since COPY stateids don't have an associated inode,
+		 * avoid triggering state recovery.
+		 */
+		status = -EBADF;
+		break;
+	case -NFS4ERR_NOTSUPP:
+	case -ENOTSUPP:
+	case -EOPNOTSUPP:
+		server->caps &= ~NFS_CAP_OFFLOAD_STATUS;
+		status = -EOPNOTSUPP;
+		break;
+	}
+
+	return status;
+}
+
+/**
+ * nfs42_proc_offload_status - Poll completion status of an async copy operation
+ * @dst: handle of file being copied into
+ * @stateid: copy stateid (from async COPY result)
+ * @copied: OUT: number of bytes copied so far
+ *
+ * Return values:
+ *   %0: Server returned an NFS4_OK completion status
+ *   %-EINPROGRESS: Server returned no completion status
+ *   %-EREMOTEIO: Server returned an error completion status
+ *   %-EBADF: Server did not recognize the copy stateid
+ *   %-EOPNOTSUPP: Server does not support OFFLOAD_STATUS
+ *   %-ERESTARTSYS: Wait interrupted by signal
+ *
+ * Other negative errnos indicate the client could not complete the
+ * request.
+ */
+static int
+nfs42_proc_offload_status(struct file *dst, nfs4_stateid *stateid, u64 *copied)
+{
+	struct inode *inode = file_inode(dst);
+	struct nfs_server *server = NFS_SERVER(inode);
+	struct nfs4_exception exception = {
+		.inode = inode,
+	};
+	struct nfs42_offload_data *data;
+	int status;
+
+	if (!(server->caps & NFS_CAP_OFFLOAD_STATUS))
+		return -EOPNOTSUPP;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+	data->seq_server = server;
+	data->args.osa_src_fh = NFS_FH(inode);
+	memcpy(&data->args.osa_stateid, stateid,
+		sizeof(data->args.osa_stateid));
+	exception.stateid = &data->args.osa_stateid;
+	do {
+		status = _nfs42_proc_offload_status(server, dst, data);
+		if (status == -EOPNOTSUPP)
+			goto out;
+		status = nfs4_handle_exception(server, status, &exception);
+	} while (exception.retry);
+	if (status)
+		goto out;
+
+	*copied = data->res.osr_count;
+	if (!data->res.complete_count)
+		status = -EINPROGRESS;
+	else if (data->res.osr_complete != NFS_OK)
+		status = -EREMOTEIO;
+
+out:
+	kfree(data);
+	return status;
+}
+
 static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
 				   struct nfs42_copy_notify_args *args,
 				   struct nfs42_copy_notify_res *res)
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 5072d7ea72e9..b1b663468249 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -35,6 +35,11 @@
 #define encode_offload_cancel_maxsz	(op_encode_hdr_maxsz + \
 					 XDR_QUADLEN(NFS4_STATEID_SIZE))
 #define decode_offload_cancel_maxsz	(op_decode_hdr_maxsz)
+#define encode_offload_status_maxsz	(op_encode_hdr_maxsz + \
+					 XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_offload_status_maxsz	(op_decode_hdr_maxsz + \
+					 2 /* osr_count */ + \
+					 2 /* osr_complete */)
 #define encode_copy_notify_maxsz	(op_encode_hdr_maxsz + \
 					 XDR_QUADLEN(NFS4_STATEID_SIZE) + \
 					 1 + /* nl4_type */ \
@@ -143,6 +148,14 @@
 					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_offload_cancel_maxsz)
+#define NFS4_enc_offload_status_sz	(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
+					 encode_putfh_maxsz + \
+					 encode_offload_status_maxsz)
+#define NFS4_dec_offload_status_sz	(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
+					 decode_putfh_maxsz + \
+					 decode_offload_status_maxsz)
 #define NFS4_enc_copy_notify_sz		(compound_encode_hdr_maxsz + \
 					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
@@ -345,6 +358,14 @@ static void encode_offload_cancel(struct xdr_stream *xdr,
 	encode_nfs4_stateid(xdr, &args->osa_stateid);
 }
 
+static void encode_offload_status(struct xdr_stream *xdr,
+				  const struct nfs42_offload_status_args *args,
+				  struct compound_hdr *hdr)
+{
+	encode_op_hdr(xdr, OP_OFFLOAD_STATUS, decode_offload_status_maxsz, hdr);
+	encode_nfs4_stateid(xdr, &args->osa_stateid);
+}
+
 static void encode_copy_notify(struct xdr_stream *xdr,
 			       const struct nfs42_copy_notify_args *args,
 			       struct compound_hdr *hdr)
@@ -570,6 +591,25 @@ static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
 }
 
 /*
+ * Encode OFFLOAD_STATUS request
+ */
+static void nfs4_xdr_enc_offload_status(struct rpc_rqst *req,
+					struct xdr_stream *xdr,
+					const void *data)
+{
+	const struct nfs42_offload_status_args *args = data;
+	struct compound_hdr hdr = {
+		.minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
+	};
+
+	encode_compound_hdr(xdr, req, &hdr);
+	encode_sequence(xdr, &args->osa_seq_args, &hdr);
+	encode_putfh(xdr, args->osa_src_fh, &hdr);
+	encode_offload_status(xdr, args, &hdr);
+	encode_nops(&hdr);
+}
+
+/*
  * Encode COPY_NOTIFY request
  */
 static void nfs4_xdr_enc_copy_notify(struct rpc_rqst *req,
@@ -921,6 +961,26 @@ static int decode_offload_cancel(struct xdr_stream *xdr,
 	return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
 }
 
+static int decode_offload_status(struct xdr_stream *xdr,
+				 struct nfs42_offload_status_res *res)
+{
+	ssize_t result;
+	int status;
+
+	status = decode_op_hdr(xdr, OP_OFFLOAD_STATUS);
+	if (status)
+		return status;
+	/* osr_count */
+	if (xdr_stream_decode_u64(xdr, &res->osr_count) < 0)
+		return -EIO;
+	/* osr_complete<1> */
+	result = xdr_stream_decode_uint32_array(xdr, &res->osr_complete, 1);
+	if (result < 0)
+		return -EIO;
+	res->complete_count = result;
+	return 0;
+}
+
 static int decode_copy_notify(struct xdr_stream *xdr,
 			      struct nfs42_copy_notify_res *res)
 {
@@ -1371,6 +1431,32 @@ out:
 }
 
 /*
+ * Decode OFFLOAD_STATUS response
+ */
+static int nfs4_xdr_dec_offload_status(struct rpc_rqst *rqstp,
+				       struct xdr_stream *xdr,
+				       void *data)
+{
+	struct nfs42_offload_status_res *res = data;
+	struct compound_hdr hdr;
+	int status;
+
+	status = decode_compound_hdr(xdr, &hdr);
+	if (status)
+		goto out;
+	status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
+	if (status)
+		goto out;
+	status = decode_putfh(xdr);
+	if (status)
+		goto out;
+	status = decode_offload_status(xdr, res);
+
+out:
+	return status;
+}
+
+/*
  * Decode COPY_NOTIFY response
  */
 static int nfs4_xdr_dec_copy_notify(struct rpc_rqst *rqstp,
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 83378f69b35e..162c85a83a14 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -233,6 +233,8 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
 	__set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags);
 	if (test_bit(NFS_CS_PNFS, &cl_init->init_flags))
 		__set_bit(NFS_CS_PNFS, &clp->cl_flags);
+	if (test_bit(NFS_CS_NETUNREACH_FATAL, &cl_init->init_flags))
+		__set_bit(NFS_CS_NETUNREACH_FATAL, &clp->cl_flags);
 	/*
 	 * Set up the connection to the server before we add add to the
 	 * global list.
@@ -937,6 +939,9 @@ static int nfs4_set_client(struct nfs_server *server,
 		__set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags);
 	server->port = rpc_get_port((struct sockaddr *)addr);
 
+	if (server->flags & NFS_MOUNT_NETUNREACH_FATAL)
+		__set_bit(NFS_CS_NETUNREACH_FATAL, &cl_init.init_flags);
+
 	/* Allocate or find a client reference we can use */
 	clp = nfs_get_client(&cl_init);
 	if (IS_ERR(clp))
@@ -1011,6 +1016,8 @@ struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
 
 	if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
 		__set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
+	if (test_bit(NFS_CS_NETUNREACH_FATAL, &mds_clp->cl_flags))
+		__set_bit(NFS_CS_NETUNREACH_FATAL, &cl_init.init_flags);
 
 	__set_bit(NFS_CS_PNFS, &cl_init.init_flags);
 	cl_init.max_connect = NFS_MAX_TRANSPORTS;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 70c8ea943019..970f28dbf253 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -195,6 +195,9 @@ static int nfs4_map_errors(int err)
 		return -EBUSY;
 	case -NFS4ERR_NOT_SAME:
 		return -ENOTSYNC;
+	case -ENETDOWN:
+	case -ENETUNREACH:
+		break;
 	default:
 		dprintk("%s could not handle NFSv4 error %d\n",
 				__func__, -err);
@@ -443,6 +446,8 @@ static int nfs4_delay_killable(long *timeout)
 {
 	might_sleep();
 
+	if (unlikely(nfs_current_task_exiting()))
+		return -EINTR;
 	__set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 	schedule_timeout(nfs4_update_delay(timeout));
 	if (!__fatal_signal_pending(current))
@@ -454,6 +459,8 @@ static int nfs4_delay_interruptible(long *timeout)
 {
 	might_sleep();
 
+	if (unlikely(nfs_current_task_exiting()))
+		return -EINTR;
 	__set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE);
 	schedule_timeout(nfs4_update_delay(timeout));
 	if (!signal_pending(current))
@@ -1774,7 +1781,8 @@ static void nfs_set_open_stateid_locked(struct nfs4_state *state,
 		rcu_read_unlock();
 		trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
 
-		if (!fatal_signal_pending(current)) {
+		if (!fatal_signal_pending(current) &&
+		    !nfs_current_task_exiting()) {
 			if (schedule_timeout(5*HZ) == 0)
 				status = -EAGAIN;
 			else
@@ -3576,7 +3584,7 @@ static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
 		write_sequnlock(&state->seqlock);
 		trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
 
-		if (fatal_signal_pending(current))
+		if (fatal_signal_pending(current) || nfs_current_task_exiting())
 			status = -EINTR;
 		else
 			if (schedule_timeout(5*HZ) != 0)
@@ -9594,7 +9602,7 @@ static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
 		return;
 
 	trace_nfs4_sequence(clp, task->tk_status);
-	if (task->tk_status < 0 && !task->tk_client->cl_shutdown) {
+	if (task->tk_status < 0 && clp->cl_cons_state >= 0) {
 		dprintk("%s ERROR %d\n", __func__, task->tk_status);
 		if (refcount_read(&clp->cl_count) == 1)
 			return;
@@ -10798,7 +10806,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
 		| NFS_CAP_CLONE
 		| NFS_CAP_LAYOUTERROR
 		| NFS_CAP_READ_PLUS
-		| NFS_CAP_MOVEABLE,
+		| NFS_CAP_MOVEABLE
+		| NFS_CAP_OFFLOAD_STATUS,
 	.init_client = nfs41_init_client,
 	.shutdown_client = nfs41_shutdown_client,
 	.match_stateid = nfs41_match_stateid,
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 542cdf71229f..7612e977e80b 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1198,7 +1198,7 @@ void nfs4_schedule_state_manager(struct nfs_client *clp)
 	struct rpc_clnt *clnt = clp->cl_rpcclient;
 	bool swapon = false;
 
-	if (clnt->cl_shutdown)
+	if (clp->cl_cons_state < 0)
 		return;
 
 	set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);
@@ -1403,7 +1403,7 @@ int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_
 	dprintk("%s: scheduling stateid recovery for server %s\n", __func__,
 			clp->cl_hostname);
 	nfs4_schedule_state_manager(clp);
-	return 0;
+	return clp->cl_cons_state < 0 ? clp->cl_cons_state : 0;
 }
 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery);
 
@@ -2739,7 +2739,15 @@ out_error:
 	pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
 			" with error %d\n", section_sep, section,
 			clp->cl_hostname, -status);
-	ssleep(1);
+	switch (status) {
+	case -ENETDOWN:
+	case -ENETUNREACH:
+		nfs_mark_client_ready(clp, -EIO);
+		break;
+	default:
+		ssleep(1);
+		break;
+	}
 out_drain:
 	memalloc_nofs_restore(memflags);
 	nfs4_end_drain_session(clp);
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 22c973316f0b..bc67fe6801b1 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -2608,7 +2608,7 @@ TRACE_EVENT(nfs4_copy_notify,
 		)
 );
 
-TRACE_EVENT(nfs4_offload_cancel,
+DECLARE_EVENT_CLASS(nfs4_offload_class,
 		TP_PROTO(
 			const struct nfs42_offload_status_args *args,
 			int error
@@ -2640,6 +2640,15 @@ TRACE_EVENT(nfs4_offload_cancel,
 			__entry->stateid_seq, __entry->stateid_hash
 		)
 );
+#define DEFINE_NFS4_OFFLOAD_EVENT(name) \
+	DEFINE_EVENT(nfs4_offload_class, name,  \
+			TP_PROTO( \
+				const struct nfs42_offload_status_args *args, \
+				int error \
+			), \
+			TP_ARGS(args, error))
+DEFINE_NFS4_OFFLOAD_EVENT(nfs4_offload_cancel);
+DEFINE_NFS4_OFFLOAD_EVENT(nfs4_offload_status);
 
 DECLARE_EVENT_CLASS(nfs4_xattr_event,
 		TP_PROTO(
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index e8ac3f615f93..55bef5fbfa47 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -82,9 +82,8 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  */
 #define pagepad_maxsz		(1)
-#define open_owner_id_maxsz	(1 + 2 + 1 + 1 + 2)
-#define lock_owner_id_maxsz	(1 + 1 + 4)
-#define decode_lockowner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#define open_owner_id_maxsz	(2 + 1 + 2 + 2)
+#define lock_owner_id_maxsz	(2 + 1 + 2)
 #define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
 #define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
 #define op_encode_hdr_maxsz	(1)
@@ -185,7 +184,7 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 #define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
 #define encode_open_maxsz	(op_encode_hdr_maxsz + \
 				2 + encode_share_access_maxsz + 2 + \
-				open_owner_id_maxsz + \
+				1 + open_owner_id_maxsz + \
 				encode_opentype_maxsz + \
 				encode_claim_null_maxsz)
 #define decode_space_limit_maxsz	(3)
@@ -255,13 +254,14 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 #define encode_link_maxsz	(op_encode_hdr_maxsz + \
 				nfs4_name_maxsz)
 #define decode_link_maxsz	(op_decode_hdr_maxsz + decode_change_info_maxsz)
-#define encode_lockowner_maxsz	(7)
+#define encode_lockowner_maxsz	(2 + 1 + lock_owner_id_maxsz)
+
 #define encode_lock_maxsz	(op_encode_hdr_maxsz + \
 				 7 + \
 				 1 + encode_stateid_maxsz + 1 + \
 				 encode_lockowner_maxsz)
 #define decode_lock_denied_maxsz \
-				(8 + decode_lockowner_maxsz)
+				(2 + 2 + 1 + 2 + 1 + lock_owner_id_maxsz)
 #define decode_lock_maxsz	(op_decode_hdr_maxsz + \
 				 decode_lock_denied_maxsz)
 #define encode_lockt_maxsz	(op_encode_hdr_maxsz + 5 + \
@@ -617,7 +617,7 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 				 encode_lockowner_maxsz)
 #define NFS4_dec_release_lockowner_sz \
 				(compound_decode_hdr_maxsz + \
-				 decode_lockowner_maxsz)
+				 decode_release_lockowner_maxsz)
 #define NFS4_enc_access_sz	(compound_encode_hdr_maxsz + \
 				encode_sequence_maxsz + \
 				encode_putfh_maxsz + \
@@ -1412,7 +1412,7 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena
 	__be32 *p;
  /*
  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
- * owner 4 = 32
+ * owner 28
  */
 	encode_nfs4_seqid(xdr, arg->seqid);
 	encode_share_access(xdr, arg->share_access);
@@ -5077,7 +5077,7 @@ static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
 /*
  * We create the owner, so we know a proper owner.id length is 4.
  */
-static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
+static int decode_lock_denied(struct xdr_stream *xdr, struct file_lock *fl)
 {
 	uint64_t offset, length, clientid;
 	__be32 *p;
@@ -7702,6 +7702,7 @@ const struct rpc_procinfo nfs4_procedures[] = {
 	PROC42(CLONE,		enc_clone,		dec_clone),
 	PROC42(COPY,		enc_copy,		dec_copy),
 	PROC42(OFFLOAD_CANCEL,	enc_offload_cancel,	dec_offload_cancel),
+	PROC42(OFFLOAD_STATUS,	enc_offload_status,	dec_offload_status),
 	PROC42(COPY_NOTIFY,	enc_copy_notify,	dec_copy_notify),
 	PROC(LOOKUPP,		enc_lookupp,		dec_lookupp),
 	PROC42(LAYOUTERROR,	enc_layouterror,	dec_layouterror),
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index aeb715b4a690..9eea9e62afc9 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -454,8 +454,12 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
 		{ NFS_MOUNT_NONLM, ",nolock", "" },
 		{ NFS_MOUNT_NOACL, ",noacl", "" },
 		{ NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
+		{ NFS_MOUNT_FORCE_RDIRPLUS, ",rdirplus=force", "" },
 		{ NFS_MOUNT_UNSHARED, ",nosharecache", "" },
 		{ NFS_MOUNT_NORESVPORT, ",noresvport", "" },
+		{ NFS_MOUNT_NETUNREACH_FATAL,
+		  ",fatal_neterrors=ENETDOWN:ENETUNREACH",
+		  ",fatal_neterrors=none" },
 		{ 0, NULL, NULL }
 	};
 	const struct proc_nfs_info *nfs_infop;
diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c
index 7b59a40d40c0..37cb2b776435 100644
--- a/fs/nfs/sysfs.c
+++ b/fs/nfs/sysfs.c
@@ -14,6 +14,7 @@
 #include <linux/rcupdate.h>
 #include <linux/lockd/lockd.h>
 
+#include "internal.h"
 #include "nfs4_fs.h"
 #include "netns.h"
 #include "sysfs.h"
@@ -228,6 +229,25 @@ static void shutdown_client(struct rpc_clnt *clnt)
 	rpc_cancel_tasks(clnt, -EIO, shutdown_match_client, NULL);
 }
 
+/*
+ * Shut down the nfs_client only once all the superblocks
+ * have been shut down.
+ */
+static void shutdown_nfs_client(struct nfs_client *clp)
+{
+	struct nfs_server *server;
+	rcu_read_lock();
+	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
+		if (!(server->flags & NFS_MOUNT_SHUTDOWN)) {
+			rcu_read_unlock();
+			return;
+		}
+	}
+	rcu_read_unlock();
+	nfs_mark_client_ready(clp, -EIO);
+	shutdown_client(clp->cl_rpcclient);
+}
+
 static ssize_t
 shutdown_show(struct kobject *kobj, struct kobj_attribute *attr,
 				char *buf)
@@ -259,7 +279,6 @@ shutdown_store(struct kobject *kobj, struct kobj_attribute *attr,
 
 	server->flags |= NFS_MOUNT_SHUTDOWN;
 	shutdown_client(server->client);
-	shutdown_client(server->nfs_client->cl_rpcclient);
 
 	if (!IS_ERR(server->client_acl))
 		shutdown_client(server->client_acl);
@@ -267,11 +286,44 @@ shutdown_store(struct kobject *kobj, struct kobj_attribute *attr,
 	if (server->nlm_host)
 		shutdown_client(server->nlm_host->h_rpcclnt);
 out:
+	shutdown_nfs_client(server->nfs_client);
 	return count;
 }
 
 static struct kobj_attribute nfs_sysfs_attr_shutdown = __ATTR_RW(shutdown);
 
+#if IS_ENABLED(CONFIG_NFS_V4_1)
+static ssize_t
+implid_domain_show(struct kobject *kobj, struct kobj_attribute *attr,
+				char *buf)
+{
+	struct nfs_server *server = container_of(kobj, struct nfs_server, kobj);
+	struct nfs41_impl_id *impl_id = server->nfs_client->cl_implid;
+
+	if (!impl_id || strlen(impl_id->domain) == 0)
+		return 0; //sysfs_emit(buf, "");
+	return sysfs_emit(buf, "%s\n", impl_id->domain);
+}
+
+static struct kobj_attribute nfs_sysfs_attr_implid_domain = __ATTR_RO(implid_domain);
+
+
+static ssize_t
+implid_name_show(struct kobject *kobj, struct kobj_attribute *attr,
+				char *buf)
+{
+	struct nfs_server *server = container_of(kobj, struct nfs_server, kobj);
+	struct nfs41_impl_id *impl_id = server->nfs_client->cl_implid;
+
+	if (!impl_id || strlen(impl_id->name) == 0)
+		return 0; //sysfs_emit(buf, "");
+	return sysfs_emit(buf, "%s\n", impl_id->name);
+}
+
+static struct kobj_attribute nfs_sysfs_attr_implid_name = __ATTR_RO(implid_name);
+
+#endif /* IS_ENABLED(CONFIG_NFS_V4_1) */
+
 #define RPC_CLIENT_NAME_SIZE 64
 
 void nfs_sysfs_link_rpc_client(struct nfs_server *server,
@@ -309,6 +361,32 @@ static struct kobj_type nfs_sb_ktype = {
 	.child_ns_type = nfs_netns_object_child_ns_type,
 };
 
+#if IS_ENABLED(CONFIG_NFS_V4_1)
+static void nfs_sysfs_add_nfsv41_server(struct nfs_server *server)
+{
+	int ret;
+
+	if (!server->nfs_client->cl_implid)
+		return;
+
+	ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_implid_domain.attr,
+					   nfs_netns_server_namespace(&server->kobj));
+	if (ret < 0)
+		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",
+			server->s_sysfs_id, ret);
+
+	ret = sysfs_create_file_ns(&server->kobj, &nfs_sysfs_attr_implid_name.attr,
+				   nfs_netns_server_namespace(&server->kobj));
+	if (ret < 0)
+		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",
+			server->s_sysfs_id, ret);
+}
+#else /* CONFIG_NFS_V4_1 */
+static inline void nfs_sysfs_add_nfsv41_server(struct nfs_server *server)
+{
+}
+#endif /* CONFIG_NFS_V4_1 */
+
 void nfs_sysfs_add_server(struct nfs_server *server)
 {
 	int ret;
@@ -325,6 +403,8 @@ void nfs_sysfs_add_server(struct nfs_server *server)
 	if (ret < 0)
 		pr_warn("NFS: sysfs_create_file_ns for server-%d failed (%d)\n",
 			server->s_sysfs_id, ret);
+
+	nfs_sysfs_add_nfsv41_server(server);
 }
 EXPORT_SYMBOL_GPL(nfs_sysfs_add_server);
 
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index aa3d8bea3ec0..23df8b214474 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -579,8 +579,10 @@ retry:
 
 	while (!nfs_lock_request(head)) {
 		ret = nfs_wait_on_request(head);
-		if (ret < 0)
+		if (ret < 0) {
+			nfs_release_request(head);
 			return ERR_PTR(ret);
+		}
 	}
 
 	/* Ensure that nobody removed the request before we locked it */