18 files changed, 363 insertions, 249 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 0c7008fb6d5a..9e7d49fac4e3 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -416,10 +416,10 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
 		clp = nfs_match_client(cl_init);
 		if (clp) {
 			spin_unlock(&nn->nfs_client_lock);
-			if (IS_ERR(clp))
-				return clp;
 			if (new)
 				new->rpc_ops->free_client(new);
+			if (IS_ERR(clp))
+				return clp;
 			return nfs_found_client(cl_init, clp);
 		}
 		if (new) {
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 606dd3871f66..04d57e11577e 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -52,6 +52,16 @@ nfs4_is_valid_delegation(const struct nfs_delegation *delegation,
 	return false;
 }
 
+struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode)
+{
+	struct nfs_delegation *delegation;
+
+	delegation = rcu_dereference(NFS_I(inode)->delegation);
+	if (nfs4_is_valid_delegation(delegation, 0))
+		return delegation;
+	return NULL;
+}
+
 static int
 nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark)
 {
@@ -91,7 +101,7 @@ int nfs4_check_delegation(struct inode *inode, fmode_t flags)
 	return nfs4_do_check_delegation(inode, flags, false);
 }
 
-static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
+static int nfs_delegation_claim_locks(struct nfs4_state *state, const nfs4_stateid *stateid)
 {
 	struct inode *inode = state->inode;
 	struct file_lock *fl;
@@ -106,7 +116,7 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
 	spin_lock(&flctx->flc_lock);
 restart:
 	list_for_each_entry(fl, list, fl_list) {
-		if (nfs_file_open_context(fl->fl_file) != ctx)
+		if (nfs_file_open_context(fl->fl_file)->state != state)
 			continue;
 		spin_unlock(&flctx->flc_lock);
 		status = nfs4_lock_delegation_recall(fl, state, stateid);
@@ -153,7 +163,7 @@ again:
 		seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
 		err = nfs4_open_delegation_recall(ctx, state, stateid, type);
 		if (!err)
-			err = nfs_delegation_claim_locks(ctx, state, stateid);
+			err = nfs_delegation_claim_locks(state, stateid);
 		if (!err && read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
 			err = -EAGAIN;
 		mutex_unlock(&sp->so_delegreturn_mutex);
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index ddaf2644cf13..df41d16dc6ab 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -63,6 +63,7 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state
 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid);
 bool nfs4_copy_delegation_stateid(struct inode *inode, fmode_t flags, nfs4_stateid *dst, struct rpc_cred **cred);
 
+struct nfs_delegation *nfs4_get_valid_delegation(const struct inode *inode);
 void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
 int nfs4_have_delegation(struct inode *inode, fmode_t flags);
 int nfs4_check_delegation(struct inode *inode, fmode_t flags);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index bf2c43635062..50c181fa0025 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1059,6 +1059,100 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
 	return !nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU);
 }
 
+static int
+nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,
+			   struct inode *inode, int error)
+{
+	switch (error) {
+	case 1:
+		dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is valid\n",
+			__func__, dentry);
+		return 1;
+	case 0:
+		nfs_mark_for_revalidate(dir);
+		if (inode && S_ISDIR(inode->i_mode)) {
+			/* Purge readdir caches. */
+			nfs_zap_caches(inode);
+			/*
+			 * We can't d_drop the root of a disconnected tree:
+			 * its d_hash is on the s_anon list and d_drop() would hide
+			 * it from shrink_dcache_for_unmount(), leading to busy
+			 * inodes on unmount and further oopses.
+			 */
+			if (IS_ROOT(dentry))
+				return 1;
+		}
+		dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n",
+				__func__, dentry);
+		return 0;
+	}
+	dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) lookup returned error %d\n",
+				__func__, dentry, error);
+	return error;
+}
+
+static int
+nfs_lookup_revalidate_negative(struct inode *dir, struct dentry *dentry,
+			       unsigned int flags)
+{
+	int ret = 1;
+	if (nfs_neg_need_reval(dir, dentry, flags)) {
+		if (flags & LOOKUP_RCU)
+			return -ECHILD;
+		ret = 0;
+	}
+	return nfs_lookup_revalidate_done(dir, dentry, NULL, ret);
+}
+
+static int
+nfs_lookup_revalidate_delegated(struct inode *dir, struct dentry *dentry,
+				struct inode *inode)
+{
+	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
+	return nfs_lookup_revalidate_done(dir, dentry, inode, 1);
+}
+
+static int
+nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry,
+			     struct inode *inode)
+{
+	struct nfs_fh *fhandle;
+	struct nfs_fattr *fattr;
+	struct nfs4_label *label;
+	int ret;
+
+	ret = -ENOMEM;
+	fhandle = nfs_alloc_fhandle();
+	fattr = nfs_alloc_fattr();
+	label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
+	if (fhandle == NULL || fattr == NULL || IS_ERR(label))
+		goto out;
+
+	ret = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
+	if (ret < 0) {
+		if (ret == -ESTALE || ret == -ENOENT)
+			ret = 0;
+		goto out;
+	}
+	ret = 0;
+	if (nfs_compare_fh(NFS_FH(inode), fhandle))
+		goto out;
+	if (nfs_refresh_inode(inode, fattr) < 0)
+		goto out;
+
+	nfs_setsecurity(inode, fattr, label);
+	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
+
+	/* set a readdirplus hint that we had a cache miss */
+	nfs_force_use_readdirplus(dir);
+	ret = 1;
+out:
+	nfs_free_fattr(fattr);
+	nfs_free_fhandle(fhandle);
+	nfs4_label_free(label);
+	return nfs_lookup_revalidate_done(dir, dentry, inode, ret);
+}
+
 /*
  * This is called every time the dcache has a lookup hit,
  * and we should check whether we can really trust that
@@ -1070,58 +1164,36 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
  * If the parent directory is seen to have changed, we throw out the
  * cached dentry and do a new lookup.
  */
-static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
+static int
+nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
+			 unsigned int flags)
 {
-	struct inode *dir;
 	struct inode *inode;
-	struct dentry *parent;
-	struct nfs_fh *fhandle = NULL;
-	struct nfs_fattr *fattr = NULL;
-	struct nfs4_label *label = NULL;
 	int error;
 
-	if (flags & LOOKUP_RCU) {
-		parent = ACCESS_ONCE(dentry->d_parent);
-		dir = d_inode_rcu(parent);
-		if (!dir)
-			return -ECHILD;
-	} else {
-		parent = dget_parent(dentry);
-		dir = d_inode(parent);
-	}
 	nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
 	inode = d_inode(dentry);
 
-	if (!inode) {
-		if (nfs_neg_need_reval(dir, dentry, flags)) {
-			if (flags & LOOKUP_RCU)
-				return -ECHILD;
-			goto out_bad;
-		}
-		goto out_valid;
-	}
+	if (!inode)
+		return nfs_lookup_revalidate_negative(dir, dentry, flags);
 
 	if (is_bad_inode(inode)) {
-		if (flags & LOOKUP_RCU)
-			return -ECHILD;
 		dfprintk(LOOKUPCACHE, "%s: %pd2 has dud inode\n",
 				__func__, dentry);
 		goto out_bad;
 	}
 
 	if (NFS_PROTO(dir)->have_delegation(inode, FMODE_READ))
-		goto out_set_verifier;
+		return nfs_lookup_revalidate_delegated(dir, dentry, inode);
 
 	/* Force a full look up iff the parent directory has changed */
 	if (!nfs_is_exclusive_create(dir, flags) &&
 	    nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU)) {
 		error = nfs_lookup_verify_inode(inode, flags);
 		if (error) {
-			if (flags & LOOKUP_RCU)
-				return -ECHILD;
 			if (error == -ESTALE)
-				goto out_zap_parent;
-			goto out_error;
+				nfs_zap_caches(dir);
+			goto out_bad;
 		}
 		nfs_advise_use_readdirplus(dir);
 		goto out_valid;
@@ -1133,81 +1205,45 @@ static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 	if (NFS_STALE(inode))
 		goto out_bad;
 
-	error = -ENOMEM;
-	fhandle = nfs_alloc_fhandle();
-	fattr = nfs_alloc_fattr();
-	if (fhandle == NULL || fattr == NULL)
-		goto out_error;
-
-	label = nfs4_label_alloc(NFS_SERVER(inode), GFP_NOWAIT);
-	if (IS_ERR(label))
-		goto out_error;
-
 	trace_nfs_lookup_revalidate_enter(dir, dentry, flags);
-	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
+	error = nfs_lookup_revalidate_dentry(dir, dentry, inode);
 	trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error);
-	if (error == -ESTALE || error == -ENOENT)
-		goto out_bad;
-	if (error)
-		goto out_error;
-	if (nfs_compare_fh(NFS_FH(inode), fhandle))
-		goto out_bad;
-	if ((error = nfs_refresh_inode(inode, fattr)) != 0)
-		goto out_bad;
-
-	nfs_setsecurity(inode, fattr, label);
-
-	nfs_free_fattr(fattr);
-	nfs_free_fhandle(fhandle);
-	nfs4_label_free(label);
+	return error;
+out_valid:
+	return nfs_lookup_revalidate_done(dir, dentry, inode, 1);
+out_bad:
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
+	return nfs_lookup_revalidate_done(dir, dentry, inode, 0);
+}
 
-	/* set a readdirplus hint that we had a cache miss */
-	nfs_force_use_readdirplus(dir);
+static int
+__nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags,
+			int (*reval)(struct inode *, struct dentry *, unsigned int))
+{
+	struct dentry *parent;
+	struct inode *dir;
+	int ret;
 
-out_set_verifier:
-	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- out_valid:
 	if (flags & LOOKUP_RCU) {
+		parent = ACCESS_ONCE(dentry->d_parent);
+		dir = d_inode_rcu(parent);
+		if (!dir)
+			return -ECHILD;
+		ret = reval(dir, dentry, flags);
 		if (parent != ACCESS_ONCE(dentry->d_parent))
 			return -ECHILD;
-	} else
+	} else {
+		parent = dget_parent(dentry);
+		ret = reval(d_inode(parent), dentry, flags);
 		dput(parent);
-	dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is valid\n",
-			__func__, dentry);
-	return 1;
-out_zap_parent:
-	nfs_zap_caches(dir);
- out_bad:
-	WARN_ON(flags & LOOKUP_RCU);
-	nfs_free_fattr(fattr);
-	nfs_free_fhandle(fhandle);
-	nfs4_label_free(label);
-	nfs_mark_for_revalidate(dir);
-	if (inode && S_ISDIR(inode->i_mode)) {
-		/* Purge readdir caches. */
-		nfs_zap_caches(inode);
-		/*
-		 * We can't d_drop the root of a disconnected tree:
-		 * its d_hash is on the s_anon list and d_drop() would hide
-		 * it from shrink_dcache_for_unmount(), leading to busy
-		 * inodes on unmount and further oopses.
-		 */
-		if (IS_ROOT(dentry))
-			goto out_valid;
 	}
-	dput(parent);
-	dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n",
-			__func__, dentry);
-	return 0;
-out_error:
-	WARN_ON(flags & LOOKUP_RCU);
-	nfs_free_fattr(fattr);
-	nfs_free_fhandle(fhandle);
-	nfs4_label_free(label);
-	dput(parent);
-	dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) lookup returned error %d\n",
-			__func__, dentry, error);
-	return error;
+	return ret;
+}
+
+static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
+{
+	return __nfs_lookup_revalidate(dentry, flags, nfs_do_lookup_revalidate);
 }
 
 /*
@@ -1434,7 +1470,7 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
 	if (S_ISREG(file->f_path.dentry->d_inode->i_mode))
 		nfs_file_set_open_context(file, ctx);
 	else
-		err = -ESTALE;
+		err = -EOPENSTALE;
 out:
 	return err;
 }
@@ -1560,62 +1596,55 @@ no_open:
 }
 EXPORT_SYMBOL_GPL(nfs_atomic_open);
 
-static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
+static int
+nfs4_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
+			  unsigned int flags)
 {
 	struct inode *inode;
-	int ret = 0;
 
 	if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY))
-		goto no_open;
+		goto full_reval;
 	if (d_mountpoint(dentry))
-		goto no_open;
-	if (NFS_SB(dentry->d_sb)->caps & NFS_CAP_ATOMIC_OPEN_V1)
-		goto no_open;
+		goto full_reval;
 
 	inode = d_inode(dentry);
 
 	/* We can't create new files in nfs_open_revalidate(), so we
 	 * optimize away revalidation of negative dentries.
 	 */
-	if (inode == NULL) {
-		struct dentry *parent;
-		struct inode *dir;
-
-		if (flags & LOOKUP_RCU) {
-			parent = ACCESS_ONCE(dentry->d_parent);
-			dir = d_inode_rcu(parent);
-			if (!dir)
-				return -ECHILD;
-		} else {
-			parent = dget_parent(dentry);
-			dir = d_inode(parent);
-		}
-		if (!nfs_neg_need_reval(dir, dentry, flags))
-			ret = 1;
-		else if (flags & LOOKUP_RCU)
-			ret = -ECHILD;
-		if (!(flags & LOOKUP_RCU))
-			dput(parent);
-		else if (parent != ACCESS_ONCE(dentry->d_parent))
-			return -ECHILD;
-		goto out;
-	}
+	if (inode == NULL)
+		goto full_reval;
+
+	if (NFS_PROTO(dir)->have_delegation(inode, FMODE_READ))
+		return nfs_lookup_revalidate_delegated(dir, dentry, inode);
 
 	/* NFS only supports OPEN on regular files */
 	if (!S_ISREG(inode->i_mode))
-		goto no_open;
+		goto full_reval;
+
 	/* We cannot do exclusive creation on a positive dentry */
-	if (flags & LOOKUP_EXCL)
-		goto no_open;
+	if (flags & (LOOKUP_EXCL | LOOKUP_REVAL))
+		goto reval_dentry;
+
+	/* Check if the directory changed */
+	if (!nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU))
+		goto reval_dentry;
 
 	/* Let f_op->open() actually open (and revalidate) the file */
-	ret = 1;
+	return 1;
+reval_dentry:
+	if (flags & LOOKUP_RCU)
+		return -ECHILD;
+	return nfs_lookup_revalidate_dentry(dir, dentry, inode);;
 
-out:
-	return ret;
+full_reval:
+	return nfs_do_lookup_revalidate(dir, dentry, flags);
+}
 
-no_open:
-	return nfs_lookup_revalidate(dentry, flags);
+static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
+{
+	return __nfs_lookup_revalidate(dentry, flags,
+			nfs4_do_lookup_revalidate);
 }
 
 #endif /* CONFIG_NFSV4 */
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 89c03a507dd9..9cdac9945483 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -122,32 +122,49 @@ static inline int put_dreq(struct nfs_direct_req *dreq)
 }
 
 static void
-nfs_direct_good_bytes(struct nfs_direct_req *dreq, struct nfs_pgio_header *hdr)
+nfs_direct_handle_truncated(struct nfs_direct_req *dreq,
+			    const struct nfs_pgio_header *hdr,
+			    ssize_t dreq_len)
 {
-	int i;
-	ssize_t count;
+	struct nfs_direct_mirror *mirror = &dreq->mirrors[hdr->pgio_mirror_idx];
+
+	if (!(test_bit(NFS_IOHDR_ERROR, &hdr->flags) ||
+	      test_bit(NFS_IOHDR_EOF, &hdr->flags)))
+		return;
+	if (dreq->max_count >= dreq_len) {
+		dreq->max_count = dreq_len;
+		if (dreq->count > dreq_len)
+			dreq->count = dreq_len;
+
+		if (test_bit(NFS_IOHDR_ERROR, &hdr->flags))
+			dreq->error = hdr->error;
+		else /* Clear outstanding error if this is EOF */
+			dreq->error = 0;
+	}
+	if (mirror->count > dreq_len)
+		mirror->count = dreq_len;
+}
+
+static void
+nfs_direct_count_bytes(struct nfs_direct_req *dreq,
+		       const struct nfs_pgio_header *hdr)
+{
+	struct nfs_direct_mirror *mirror = &dreq->mirrors[hdr->pgio_mirror_idx];
+	loff_t hdr_end = hdr->io_start + hdr->good_bytes;
+	ssize_t dreq_len = 0;
 
-	WARN_ON_ONCE(dreq->count >= dreq->max_count);
+	if (hdr_end > dreq->io_start)
+		dreq_len = hdr_end - dreq->io_start;
 
-	if (dreq->mirror_count == 1) {
-		dreq->mirrors[hdr->pgio_mirror_idx].count += hdr->good_bytes;
-		dreq->count += hdr->good_bytes;
-	} else {
-		/* mirrored writes */
-		count = dreq->mirrors[hdr->pgio_mirror_idx].count;
-		if (count + dreq->io_start < hdr->io_start + hdr->good_bytes) {
-			count = hdr->io_start + hdr->good_bytes - dreq->io_start;
-			dreq->mirrors[hdr->pgio_mirror_idx].count = count;
-		}
-		/* update the dreq->count by finding the minimum agreed count from all
-		 * mirrors */
-		count = dreq->mirrors[0].count;
+	nfs_direct_handle_truncated(dreq, hdr, dreq_len);
 
-		for (i = 1; i < dreq->mirror_count; i++)
-			count = min(count, dreq->mirrors[i].count);
+	if (dreq_len > dreq->max_count)
+		dreq_len = dreq->max_count;
 
-		dreq->count = count;
-	}
+	if (mirror->count < dreq_len)
+		mirror->count = dreq_len;
+	if (dreq->count < dreq_len)
+		dreq->count = dreq_len;
 }
 
 /*
@@ -400,15 +417,13 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr)
 	unsigned long bytes = 0;
 	struct nfs_direct_req *dreq = hdr->dreq;
 
-	if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
-		goto out_put;
-
 	spin_lock(&dreq->lock);
-	if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes == 0))
-		dreq->error = hdr->error;
-	else
-		nfs_direct_good_bytes(dreq, hdr);
+	if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) {
+		spin_unlock(&dreq->lock);
+		goto out_put;
+	}
 
+	nfs_direct_count_bytes(dreq, hdr);
 	spin_unlock(&dreq->lock);
 
 	while (!list_empty(&hdr->pages)) {
@@ -428,7 +443,7 @@ out_put:
 	hdr->release(hdr);
 }
 
-static void nfs_read_sync_pgio_error(struct list_head *head)
+static void nfs_read_sync_pgio_error(struct list_head *head, int error)
 {
 	struct nfs_page *req;
 
@@ -645,6 +660,9 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
 	nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
 
 	dreq->count = 0;
+	dreq->max_count = 0;
+	list_for_each_entry(req, &reqs, wb_list)
+		dreq->max_count += req->wb_bytes;
 	dreq->verf.committed = NFS_INVALID_STABLE_HOW;
 	nfs_clear_pnfs_ds_commit_verifiers(&dreq->ds_cinfo);
 	for (i = 0; i < dreq->mirror_count; i++)
@@ -664,8 +682,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
 
 	list_for_each_entry_safe(req, tmp, &reqs, wb_list) {
 		if (!nfs_pageio_add_request(&desc, req)) {
-			nfs_list_remove_request(req);
-			nfs_list_add_request(req, &failed);
+			nfs_list_move_request(req, &failed);
 			spin_lock(&cinfo.inode->i_lock);
 			dreq->flags = 0;
 			if (desc.pg_error < 0)
@@ -775,17 +792,16 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
 	bool request_commit = false;
 	struct nfs_page *req = nfs_list_entry(hdr->pages.next);
 
-	if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
-		goto out_put;
-
 	nfs_init_cinfo_from_dreq(&cinfo, dreq);
 
 	spin_lock(&dreq->lock);
+	if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) {
+		spin_unlock(&dreq->lock);
+		goto out_put;
+	}
 
-	if (test_bit(NFS_IOHDR_ERROR, &hdr->flags))
-		dreq->error = hdr->error;
-	if (dreq->error == 0) {
-		nfs_direct_good_bytes(dreq, hdr);
+	nfs_direct_count_bytes(dreq, hdr);
+	if (hdr->good_bytes != 0) {
 		if (nfs_write_need_commit(hdr)) {
 			if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES)
 				request_commit = true;
@@ -821,7 +837,7 @@ out_put:
 	hdr->release(hdr);
 }
 
-static void nfs_write_sync_pgio_error(struct list_head *head)
+static void nfs_write_sync_pgio_error(struct list_head *head, int error)
 {
 	struct nfs_page *req;
 
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 9f69e83810ca..2464b9b80698 100644
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -18,7 +18,7 @@
 
 #define NFSDBG_FACILITY		NFSDBG_PNFS_LD
 
-static unsigned int dataserver_timeo = NFS_DEF_TCP_RETRANS;
+static unsigned int dataserver_timeo = NFS_DEF_TCP_TIMEO;
 static unsigned int dataserver_retrans;
 
 static bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg);
@@ -306,7 +306,7 @@ int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
 	if (status == 0)
 		return 0;
 
-	if (mirror->mirror_ds == NULL)
+	if (IS_ERR_OR_NULL(mirror->mirror_ds))
 		return -EINVAL;
 
 	dserr = kmalloc(sizeof(*dserr), gfp_flags);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 134d9f560240..71a399f6805a 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1034,6 +1034,7 @@ int nfs_open(struct inode *inode, struct file *filp)
 	nfs_fscache_open_file(inode, filp);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(nfs_open);
 
 /*
  * This function is called whenever some part of NFS notices that
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index a73144b3cb8c..22cff39cca29 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -433,7 +433,8 @@ static inline void nfs4_schedule_session_recovery(struct nfs4_session *session,
 
 extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
-extern void nfs4_purge_state_owners(struct nfs_server *);
+extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *);
+extern void nfs4_free_state_owners(struct list_head *head);
 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
 extern void nfs4_put_open_state(struct nfs4_state *);
 extern void nfs4_close_state(struct nfs4_state *, fmode_t);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 8f96f6548dc8..0924b68b5657 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -739,9 +739,12 @@ out:
 
 static void nfs4_destroy_server(struct nfs_server *server)
 {
+	LIST_HEAD(freeme);
+
 	nfs_server_return_all_delegations(server);
 	unset_pnfs_layoutdriver(server);
-	nfs4_purge_state_owners(server);
+	nfs4_purge_state_owners(server, &freeme);
+	nfs4_free_state_owners(&freeme);
 }
 
 /*
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 626d1382002e..b8d316a338bc 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -50,7 +50,7 @@ nfs4_file_open(struct inode *inode, struct file *filp)
 		return err;
 
 	if ((openflags & O_ACCMODE) == 3)
-		openflags--;
+		return nfs_open(inode, filp);
 
 	/* We can't create new files here */
 	openflags &= ~(O_CREAT|O_EXCL);
@@ -74,13 +74,13 @@ nfs4_file_open(struct inode *inode, struct file *filp)
 	if (IS_ERR(inode)) {
 		err = PTR_ERR(inode);
 		switch (err) {
-		case -EPERM:
-		case -EACCES:
-		case -EDQUOT:
-		case -ENOSPC:
-		case -EROFS:
-			goto out_put_ctx;
 		default:
+			goto out_put_ctx;
+		case -ENOENT:
+		case -ESTALE:
+		case -EISDIR:
+		case -ENOTDIR:
+		case -ELOOP:
 			goto out_drop;
 		}
 	}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a225f98c9903..f1526f65cc58 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1099,6 +1099,12 @@ struct nfs4_opendata {
 	int rpc_status;
 };
 
+struct nfs4_open_createattrs {
+	struct nfs4_label *label;
+	struct iattr *sattr;
+	const __u32 verf[2];
+};
+
 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
 		int err, struct nfs4_exception *exception)
 {
@@ -1168,8 +1174,7 @@ static void nfs4_init_opendata_res(struct nfs4_opendata *p)
 
 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 		struct nfs4_state_owner *sp, fmode_t fmode, int flags,
-		const struct iattr *attrs,
-		struct nfs4_label *label,
+		const struct nfs4_open_createattrs *c,
 		enum open_claim_type4 claim,
 		gfp_t gfp_mask)
 {
@@ -1177,6 +1182,7 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	struct inode *dir = d_inode(parent);
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
+	struct nfs4_label *label = (c != NULL) ? c->label : NULL;
 	struct nfs4_opendata *p;
 
 	p = kzalloc(sizeof(*p), gfp_mask);
@@ -1242,15 +1248,11 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 		p->o_arg.fh = NFS_FH(d_inode(dentry));
 	}
-	if (attrs != NULL && attrs->ia_valid != 0) {
-		__u32 verf[2];
-
+	if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) {
 		p->o_arg.u.attrs = &p->attrs;
-		memcpy(&p->attrs, attrs, sizeof(p->attrs));
+		memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
 
-		verf[0] = jiffies;
-		verf[1] = current->pid;
-		memcpy(p->o_arg.u.verifier.data, verf,
+		memcpy(p->o_arg.u.verifier.data, c->verf,
 				sizeof(p->o_arg.u.verifier.data));
 	}
 	p->c_arg.fh = &p->o_res.fh;
@@ -1315,12 +1317,20 @@ static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
 	return false;
 }
 
-static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
+static int can_open_cached(struct nfs4_state *state, fmode_t mode,
+		int open_mode, enum open_claim_type4 claim)
 {
 	int ret = 0;
 
 	if (open_mode & (O_EXCL|O_TRUNC))
 		goto out;
+	switch (claim) {
+	case NFS4_OPEN_CLAIM_NULL:
+	case NFS4_OPEN_CLAIM_FH:
+		goto out;
+	default:
+		break;
+	}
 	switch (mode & (FMODE_READ|FMODE_WRITE)) {
 		case FMODE_READ:
 			ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
@@ -1345,8 +1355,6 @@ static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
 		return 0;
 	if ((delegation->type & fmode) != fmode)
 		return 0;
-	if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
-		return 0;
 	switch (claim) {
 	case NFS4_OPEN_CLAIM_NULL:
 	case NFS4_OPEN_CLAIM_FH:
@@ -1605,7 +1613,6 @@ static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmo
 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
 {
 	struct nfs4_state *state = opendata->state;
-	struct nfs_inode *nfsi = NFS_I(state->inode);
 	struct nfs_delegation *delegation;
 	int open_mode = opendata->o_arg.open_flags;
 	fmode_t fmode = opendata->o_arg.fmode;
@@ -1615,14 +1622,14 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
 
 	for (;;) {
 		spin_lock(&state->owner->so_lock);
-		if (can_open_cached(state, fmode, open_mode)) {
+		if (can_open_cached(state, fmode, open_mode, claim)) {
 			update_open_stateflags(state, fmode);
 			spin_unlock(&state->owner->so_lock);
 			goto out_return_state;
 		}
 		spin_unlock(&state->owner->so_lock);
 		rcu_read_lock();
-		delegation = rcu_dereference(nfsi->delegation);
+		delegation = nfs4_get_valid_delegation(state->inode);
 		if (!can_open_delegated(delegation, fmode, claim)) {
 			rcu_read_unlock();
 			break;
@@ -1816,7 +1823,7 @@ static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context
 	struct nfs4_opendata *opendata;
 
 	opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
-			NULL, NULL, claim, GFP_NOFS);
+			NULL, claim, GFP_NOFS);
 	if (opendata == NULL)
 		return ERR_PTR(-ENOMEM);
 	opendata->state = state;
@@ -2139,10 +2146,11 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
 	if (data->state != NULL) {
 		struct nfs_delegation *delegation;
 
-		if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
+		if (can_open_cached(data->state, data->o_arg.fmode,
+					data->o_arg.open_flags, claim))
 			goto out_no_action;
 		rcu_read_lock();
-		delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
+		delegation = nfs4_get_valid_delegation(data->state->inode);
 		if (can_open_delegated(delegation, data->o_arg.fmode, claim))
 			goto unlock_no_action;
 		rcu_read_unlock();
@@ -2757,8 +2765,7 @@ out:
 static int _nfs4_do_open(struct inode *dir,
 			struct nfs_open_context *ctx,
 			int flags,
-			struct iattr *sattr,
-			struct nfs4_label *label,
+			const struct nfs4_open_createattrs *c,
 			int *opened)
 {
 	struct nfs4_state_owner  *sp;
@@ -2770,6 +2777,8 @@ static int _nfs4_do_open(struct inode *dir,
 	struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
 	fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
 	enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
+	struct iattr *sattr = c->sattr;
+	struct nfs4_label *label = c->label;
 	struct nfs4_label *olabel = NULL;
 	int status;
 
@@ -2788,8 +2797,8 @@ static int _nfs4_do_open(struct inode *dir,
 	status = -ENOMEM;
 	if (d_really_is_positive(dentry))
 		claim = NFS4_OPEN_CLAIM_FH;
-	opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
-			label, claim, GFP_KERNEL);
+	opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
+			c, claim, GFP_KERNEL);
 	if (opendata == NULL)
 		goto err_put_state_owner;
 
@@ -2870,10 +2879,18 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir,
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs4_exception exception = { };
 	struct nfs4_state *res;
+	struct nfs4_open_createattrs c = {
+		.label = label,
+		.sattr = sattr,
+		.verf = {
+			[0] = (__u32)jiffies,
+			[1] = (__u32)current->pid,
+		},
+	};
 	int status;
 
 	do {
-		status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
+		status = _nfs4_do_open(dir, ctx, flags, &c, opened);
 		res = ctx->state;
 		trace_nfs4_open_file(ctx, flags, status);
 		if (status == 0)
@@ -2934,7 +2951,6 @@ static int _nfs4_do_setattr(struct inode *inode,
 	};
 	struct rpc_cred *delegation_cred = NULL;
 	unsigned long timestamp = jiffies;
-	fmode_t fmode;
 	bool truncate;
 	int status;
 
@@ -2942,11 +2958,12 @@ static int _nfs4_do_setattr(struct inode *inode,
 
 	/* Servers should only apply open mode checks for file size changes */
 	truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
-	fmode = truncate ? FMODE_WRITE : FMODE_READ;
+	if (!truncate)
+		goto zero_stateid;
 
-	if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
+	if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
 		/* Use that stateid */
-	} else if (truncate && ctx != NULL) {
+	} else if (ctx != NULL && ctx->state) {
 		struct nfs_lock_context *l_ctx;
 		if (!nfs4_valid_open_stateid(ctx->state))
 			return -EBADF;
@@ -2958,8 +2975,10 @@ static int _nfs4_do_setattr(struct inode *inode,
 		nfs_put_lock_context(l_ctx);
 		if (status == -EIO)
 			return -EBADF;
-	} else
+	} else {
+zero_stateid:
 		nfs4_stateid_copy(&arg->stateid, &zero_stateid);
+	}
 	if (delegation_cred)
 		msg.rpc_cred = delegation_cred;
 
@@ -5633,6 +5652,7 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
 	}
 	status = task->tk_status;
 	if (setclientid.sc_cred) {
+		kfree(clp->cl_acceptor);
 		clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
 		put_rpccred(setclientid.sc_cred);
 	}
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 85ec07e4aa91..f92bfc787c5f 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -614,24 +614,39 @@ void nfs4_put_state_owner(struct nfs4_state_owner *sp)
 /**
  * nfs4_purge_state_owners - Release all cached state owners
  * @server: nfs_server with cached state owners to release
+ * @head: resulting list of state owners
  *
  * Called at umount time.  Remaining state owners will be on
  * the LRU with ref count of zero.
+ * Note that the state owners are not freed, but are added
+ * to the list @head, which can later be used as an argument
+ * to nfs4_free_state_owners.
  */
-void nfs4_purge_state_owners(struct nfs_server *server)
+void nfs4_purge_state_owners(struct nfs_server *server, struct list_head *head)
 {
 	struct nfs_client *clp = server->nfs_client;
 	struct nfs4_state_owner *sp, *tmp;
-	LIST_HEAD(doomed);
 
 	spin_lock(&clp->cl_lock);
 	list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) {
-		list_move(&sp->so_lru, &doomed);
+		list_move(&sp->so_lru, head);
 		nfs4_remove_state_owner_locked(sp);
 	}
 	spin_unlock(&clp->cl_lock);
+}
 
-	list_for_each_entry_safe(sp, tmp, &doomed, so_lru) {
+/**
+ * nfs4_purge_state_owners - Release all cached state owners
+ * @head: resulting list of state owners
+ *
+ * Frees a list of state owners that was generated by
+ * nfs4_purge_state_owners
+ */
+void nfs4_free_state_owners(struct list_head *head)
+{
+	struct nfs4_state_owner *sp, *tmp;
+
+	list_for_each_entry_safe(sp, tmp, head, so_lru) {
 		list_del(&sp->so_lru);
 		nfs4_free_state_owner(sp);
 	}
@@ -1782,12 +1797,13 @@ static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recov
 	struct nfs4_state_owner *sp;
 	struct nfs_server *server;
 	struct rb_node *pos;
+	LIST_HEAD(freeme);
 	int status = 0;
 
 restart:
 	rcu_read_lock();
 	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		nfs4_purge_state_owners(server);
+		nfs4_purge_state_owners(server, &freeme);
 		spin_lock(&clp->cl_lock);
 		for (pos = rb_first(&server->state_owners);
 		     pos != NULL;
@@ -1816,6 +1832,7 @@ restart:
 		spin_unlock(&clp->cl_lock);
 	}
 	rcu_read_unlock();
+	nfs4_free_state_owners(&freeme);
 	return 0;
 }
 
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 549c916d2859..525684b0056f 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1132,7 +1132,7 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
 		} else
 			*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 	}
-	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
+	if (label && (bmval[2] & FATTR4_WORD2_SECURITY_LABEL)) {
 		*p++ = cpu_to_be32(label->lfs);
 		*p++ = cpu_to_be32(label->pi);
 		*p++ = cpu_to_be32(label->len);
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 28b013d1d44a..ceb6892d9bbd 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -566,7 +566,7 @@ static void nfs_pgio_rpcsetup(struct nfs_pgio_header *hdr,
 	}
 
 	hdr->res.fattr   = &hdr->fattr;
-	hdr->res.count   = count;
+	hdr->res.count   = 0;
 	hdr->res.eof     = 0;
 	hdr->res.verf    = &hdr->verf;
 	nfs_fattr_init(&hdr->fattr);
@@ -768,8 +768,7 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
 	pageused = 0;
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
-		nfs_list_remove_request(req);
-		nfs_list_add_request(req, &hdr->pages);
+		nfs_list_move_request(req, &hdr->pages);
 
 		if (!last_page || last_page != req->wb_page) {
 			pageused++;
@@ -961,8 +960,7 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc,
 	}
 	if (!nfs_can_coalesce_requests(prev, req, desc))
 		return 0;
-	nfs_list_remove_request(req);
-	nfs_list_add_request(req, &mirror->pg_list);
+	nfs_list_move_request(req, &mirror->pg_list);
 	mirror->pg_count += req->wb_bytes;
 	return 1;
 }
@@ -994,9 +992,8 @@ nfs_pageio_cleanup_request(struct nfs_pageio_descriptor *desc,
 {
 	LIST_HEAD(head);
 
-	nfs_list_remove_request(req);
-	nfs_list_add_request(req, &head);
-	desc->pg_completion_ops->error_cleanup(&head);
+	nfs_list_move_request(req, &head);
+	desc->pg_completion_ops->error_cleanup(&head, desc->pg_error);
 }
 
 /**
@@ -1132,7 +1129,8 @@ static void nfs_pageio_error_cleanup(struct nfs_pageio_descriptor *desc)
 
 	for (midx = 0; midx < desc->pg_mirror_count; midx++) {
 		mirror = &desc->pg_mirrors[midx];
-		desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
+		desc->pg_completion_ops->error_cleanup(&mirror->pg_list,
+				desc->pg_error);
 	}
 }
 
@@ -1234,21 +1232,23 @@ static void nfs_pageio_complete_mirror(struct nfs_pageio_descriptor *desc,
 int nfs_pageio_resend(struct nfs_pageio_descriptor *desc,
 		      struct nfs_pgio_header *hdr)
 {
-	LIST_HEAD(failed);
+	LIST_HEAD(pages);
 
 	desc->pg_io_completion = hdr->io_completion;
 	desc->pg_dreq = hdr->dreq;
-	while (!list_empty(&hdr->pages)) {
-		struct nfs_page *req = nfs_list_entry(hdr->pages.next);
+	list_splice_init(&hdr->pages, &pages);
+	while (!list_empty(&pages)) {
+		struct nfs_page *req = nfs_list_entry(pages.next);
 
-		nfs_list_remove_request(req);
 		if (!nfs_pageio_add_request(desc, req))
-			nfs_list_add_request(req, &failed);
+			break;
 	}
 	nfs_pageio_complete(desc);
-	if (!list_empty(&failed)) {
-		list_move(&failed, &hdr->pages);
-		return desc->pg_error < 0 ? desc->pg_error : -EIO;
+	if (!list_empty(&pages)) {
+		int err = desc->pg_error < 0 ? desc->pg_error : -EIO;
+		hdr->completion_ops->error_cleanup(&pages, err);
+		nfs_set_pgio_error(hdr, err, hdr->io_start);
+		return err;
 	}
 	return 0;
 }
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 96867fb159bf..ec04cce31814 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1319,10 +1319,15 @@ void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
 	const nfs4_stateid *res_stateid = NULL;
 	struct nfs4_xdr_opaque_data *ld_private = args->ld_private;
 
-	if (ret == 0) {
-		arg_stateid = &args->stateid;
+	switch (ret) {
+	case -NFS4ERR_NOMATCHING_LAYOUT:
+		break;
+	case 0:
 		if (res->lrs_present)
 			res_stateid = &res->stateid;
+		/* Fallthrough */
+	default:
+		arg_stateid = &args->stateid;
 	}
 	pnfs_layoutreturn_free_lsegs(lo, arg_stateid, &args->range,
 			res_stateid);
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index f7fd9192d4bc..eff93315572e 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -589,7 +589,8 @@ static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 		/* Emulate the eof flag, which isn't normally needed in NFSv2
 		 * as it is guaranteed to always return the file attributes
 		 */
-		if (hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
+		if ((hdr->res.count == 0 && hdr->args.count > 0) ||
+		    hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
 			hdr->res.eof = 1;
 	}
 	return 0;
@@ -610,8 +611,10 @@ static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task,
 
 static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	if (task->tk_status >= 0)
+	if (task->tk_status >= 0) {
+		hdr->res.count = hdr->args.count;
 		nfs_writeback_update_inode(hdr);
+	}
 	return 0;
 }
 
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 48d7277c60a9..09d5c282f50e 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -205,7 +205,7 @@ static void nfs_initiate_read(struct nfs_pgio_header *hdr,
 }
 
 static void
-nfs_async_read_error(struct list_head *head)
+nfs_async_read_error(struct list_head *head, int error)
 {
 	struct nfs_page	*req;
 
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 50ed3944d183..01b9d9341b54 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -783,7 +783,6 @@ static void nfs_inode_remove_request(struct nfs_page *req)
 	struct nfs_inode *nfsi = NFS_I(inode);
 	struct nfs_page *head;
 
-	atomic_long_dec(&nfsi->nrequests);
 	if (nfs_page_group_sync_on_bit(req, PG_REMOVE)) {
 		head = req->wb_head;
 
@@ -796,8 +795,10 @@ static void nfs_inode_remove_request(struct nfs_page *req)
 		spin_unlock(&mapping->private_lock);
 	}
 
-	if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags))
+	if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags)) {
 		nfs_release_request(req);
+		atomic_long_dec(&nfsi->nrequests);
+	}
 }
 
 static void
@@ -1397,20 +1398,27 @@ static void nfs_redirty_request(struct nfs_page *req)
 	nfs_release_request(req);
 }
 
-static void nfs_async_write_error(struct list_head *head)
+static void nfs_async_write_error(struct list_head *head, int error)
 {
 	struct nfs_page	*req;
 
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
 		nfs_list_remove_request(req);
+		if (nfs_error_is_fatal(error)) {
+			nfs_context_set_write_error(req->wb_context, error);
+			if (nfs_error_is_fatal_on_server(error)) {
+				nfs_write_error_remove_page(req);
+				continue;
+			}
+		}
 		nfs_redirty_request(req);
 	}
 }
 
 static void nfs_async_write_reschedule_io(struct nfs_pgio_header *hdr)
 {
-	nfs_async_write_error(&hdr->pages);
+	nfs_async_write_error(&hdr->pages, 0);
 }
 
 static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = {