Merge tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Highlights include:

  Stable bugfixes:
   - Fix use after free in write error path
   - Use GFP_NOIO for two allocations in writeback
   - Fix a hang in OPEN related to server reboot
   - Check the result of nfs4_pnfs_ds_connect
   - Fix an rcu lock leak

  Features:
   - Removal of the unmaintained and unused OSD pNFS layout
   - Cleanup and removal of lots of unnecessary dprintk()s
   - Cleanup and removal of some memory failure paths now that GFP_NOFS
     is guaranteed to never fail.
   - Remove the v3-only data server limitation on pNFS/flexfiles

  Bugfixes:
   - RPC/RDMA connection handling bugfixes
   - Copy offload: fixes to ensure the copied data is COMMITed to disk.
   - Readdir: switch back to using the ->iterate VFS interface
   - File locking fixes from Ben Coddington
   - Various use-after-free and deadlock issues in pNFS
   - Write path bugfixes"

* tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (89 commits)
  pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabled
  NFSv4.1: Work around a Linux server bug...
  NFS append COMMIT after synchronous COPY
  NFSv4: Fix exclusive create attributes encoding
  NFSv4: Fix an rcu lock leak
  nfs: use kmap/kunmap directly
  NFS: always treat the invocation of nfs_getattr as cache hit when noac is on
  Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renew
  NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION
  pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits
  pNFS: Fix a typo in pnfs_generic_alloc_ds_commits
  pNFS: Fix a deadlock when coalescing writes and returning the layout
  pNFS: Don't clear the layout return info if there are segments to return
  pNFS: Ensure we commit the layout if it has been invalidated
  pNFS: Don't send COMMITs to the DSes if the server invalidated our layout
  pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure path
  pNFS: Ensure we check layout validity before marking it for return
  NFS4.1 handle interrupted slot reuse from ERR_DELAY
  NFSv4: check return value of xdr_inline_decode
  nfs/filelayout: fix NULL pointer dereference in fl_pnfs_update_layout()
  ...

1 files changed, 12 insertions, 55 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 04d15a0045e3..ee5ddbd36088 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -218,6 +218,7 @@ static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
 static void pnfs_init_server(struct nfs_server *server)
 {
 	rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
+	rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC");
 }
 
 #else
@@ -240,8 +241,6 @@ static void pnfs_init_server(struct nfs_server *server)
  */
 void nfs_free_client(struct nfs_client *clp)
 {
-	dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
-
 	nfs_fscache_release_client_cookie(clp);
 
 	/* -EIO all pending I/O */
@@ -256,8 +255,6 @@ void nfs_free_client(struct nfs_client *clp)
 	kfree(clp->cl_hostname);
 	kfree(clp->cl_acceptor);
 	kfree(clp);
-
-	dprintk("<-- nfs_free_client()\n");
 }
 EXPORT_SYMBOL_GPL(nfs_free_client);
 
@@ -271,7 +268,6 @@ void nfs_put_client(struct nfs_client *clp)
 	if (!clp)
 		return;
 
-	dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
 	nn = net_generic(clp->cl_net, nfs_net_id);
 
 	if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
@@ -382,9 +378,6 @@ nfs_found_client(const struct nfs_client_initdata *cl_init,
 	}
 
 	smp_rmb();
-
-	dprintk("<-- %s found nfs_client %p for %s\n",
-		__func__, clp, cl_init->hostname ?: "");
 	return clp;
 }
 
@@ -403,9 +396,6 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
 		return NULL;
 	}
 
-	dprintk("--> nfs_get_client(%s,v%u)\n",
-		cl_init->hostname, rpc_ops->version);
-
 	/* see if the client already exists */
 	do {
 		spin_lock(&nn->nfs_client_lock);
@@ -430,8 +420,6 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
 		new = rpc_ops->alloc_client(cl_init);
 	} while (!IS_ERR(new));
 
-	dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
-		cl_init->hostname, PTR_ERR(new));
 	return new;
 }
 EXPORT_SYMBOL_GPL(nfs_get_client);
@@ -558,6 +546,7 @@ static int nfs_start_lockd(struct nfs_server *server)
 		.noresvport	= server->flags & NFS_MOUNT_NORESVPORT ?
 					1 : 0,
 		.net		= clp->cl_net,
+		.nlmclnt_ops 	= clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
 	};
 
 	if (nlm_init.nfs_version > 3)
@@ -624,27 +613,21 @@ struct nfs_client *nfs_init_client(struct nfs_client *clp,
 {
 	int error;
 
-	if (clp->cl_cons_state == NFS_CS_READY) {
-		/* the client is already initialised */
-		dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
+	/* the client is already initialised */
+	if (clp->cl_cons_state == NFS_CS_READY)
 		return clp;
-	}
 
 	/*
 	 * Create a client RPC handle for doing FSSTAT with UNIX auth only
 	 * - RFC 2623, sec 2.3.2
 	 */
 	error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX);
-	if (error < 0)
-		goto error;
-	nfs_mark_client_ready(clp, NFS_CS_READY);
+	nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error);
+	if (error < 0) {
+		nfs_put_client(clp);
+		clp = ERR_PTR(error);
+	}
 	return clp;
-
-error:
-	nfs_mark_client_ready(clp, error);
-	nfs_put_client(clp);
-	dprintk("<-- nfs_init_client() = xerror %d\n", error);
-	return ERR_PTR(error);
 }
 EXPORT_SYMBOL_GPL(nfs_init_client);
 
@@ -668,8 +651,6 @@ static int nfs_init_server(struct nfs_server *server,
 	struct nfs_client *clp;
 	int error;
 
-	dprintk("--> nfs_init_server()\n");
-
 	nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
 			data->timeo, data->retrans);
 	if (data->flags & NFS_MOUNT_NORESVPORT)
@@ -677,10 +658,8 @@ static int nfs_init_server(struct nfs_server *server,
 
 	/* Allocate or find a client reference we can use */
 	clp = nfs_get_client(&cl_init);
-	if (IS_ERR(clp)) {
-		dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
+	if (IS_ERR(clp))
 		return PTR_ERR(clp);
-	}
 
 	server->nfs_client = clp;
 
@@ -725,13 +704,11 @@ static int nfs_init_server(struct nfs_server *server,
 	server->mountd_protocol = data->mount_server.protocol;
 
 	server->namelen  = data->namlen;
-	dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
 	return 0;
 
 error:
 	server->nfs_client = NULL;
 	nfs_put_client(clp);
-	dprintk("<-- nfs_init_server() = xerror %d\n", error);
 	return error;
 }
 
@@ -798,12 +775,10 @@ int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs
 	struct nfs_client *clp = server->nfs_client;
 	int error;
 
-	dprintk("--> nfs_probe_fsinfo()\n");
-
 	if (clp->rpc_ops->set_capabilities != NULL) {
 		error = clp->rpc_ops->set_capabilities(server, mntfh);
 		if (error < 0)
-			goto out_error;
+			return error;
 	}
 
 	fsinfo.fattr = fattr;
@@ -811,7 +786,7 @@ int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs
 	memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype));
 	error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
 	if (error < 0)
-		goto out_error;
+		return error;
 
 	nfs_server_set_fsinfo(server, &fsinfo);
 
@@ -826,12 +801,7 @@ int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs
 			server->namelen = pathinfo.max_namelen;
 	}
 
-	dprintk("<-- nfs_probe_fsinfo() = 0\n");
 	return 0;
-
-out_error:
-	dprintk("nfs_probe_fsinfo: error = %d\n", -error);
-	return error;
 }
 EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
 
@@ -927,8 +897,6 @@ EXPORT_SYMBOL_GPL(nfs_alloc_server);
  */
 void nfs_free_server(struct nfs_server *server)
 {
-	dprintk("--> nfs_free_server()\n");
-
 	nfs_server_remove_lists(server);
 
 	if (server->destroy != NULL)
@@ -946,7 +914,6 @@ void nfs_free_server(struct nfs_server *server)
 	nfs_free_iostats(server->io_stats);
 	kfree(server);
 	nfs_release_automount_timer();
-	dprintk("<-- nfs_free_server()\n");
 }
 EXPORT_SYMBOL_GPL(nfs_free_server);
 
@@ -1026,10 +993,6 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
 	struct nfs_fattr *fattr_fsinfo;
 	int error;
 
-	dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
-		(unsigned long long) fattr->fsid.major,
-		(unsigned long long) fattr->fsid.minor);
-
 	server = nfs_alloc_server();
 	if (!server)
 		return ERR_PTR(-ENOMEM);
@@ -1061,10 +1024,6 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
 	if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
 		server->namelen = NFS4_MAXNAMLEN;
 
-	dprintk("Cloned FSID: %llx:%llx\n",
-		(unsigned long long) server->fsid.major,
-		(unsigned long long) server->fsid.minor);
-
 	error = nfs_start_lockd(server);
 	if (error < 0)
 		goto out_free_server;
@@ -1073,13 +1032,11 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
 	server->mount_time = jiffies;
 
 	nfs_free_fattr(fattr_fsinfo);
-	dprintk("<-- nfs_clone_server() = %p\n", server);
 	return server;
 
 out_free_server:
 	nfs_free_fattr(fattr_fsinfo);
 	nfs_free_server(server);
-	dprintk("<-- nfs_clone_server() = error %d\n", error);
 	return ERR_PTR(error);
 }
 EXPORT_SYMBOL_GPL(nfs_clone_server);