1 files changed, 42 insertions, 9 deletions

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 5ae670807449..5ca748309c26 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -297,12 +297,12 @@ nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	}
 
 	if (d_really_is_positive(child)) {
-		status = nfs_ok;
-
 		/* NFSv4 protocol requires change attributes even though
 		 * no change happened.
 		 */
-		fh_fill_both_attrs(fhp);
+		status = fh_fill_both_attrs(fhp);
+		if (status != nfs_ok)
+			goto out;
 
 		switch (open->op_createmode) {
 		case NFS4_CREATE_UNCHECKED:
@@ -345,7 +345,9 @@ nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	if (!IS_POSIXACL(inode))
 		iap->ia_mode &= ~current_umask();
 
-	fh_fill_pre_attrs(fhp);
+	status = fh_fill_pre_attrs(fhp);
+	if (status != nfs_ok)
+		goto out;
 	status = nfsd4_vfs_create(fhp, child, open);
 	if (status != nfs_ok)
 		goto out;
@@ -380,6 +382,38 @@ out:
 	return status;
 }
 
+/**
+ * set_change_info - set up the change_info4 for a reply
+ * @cinfo: pointer to nfsd4_change_info to be populated
+ * @fhp: pointer to svc_fh to use as source
+ *
+ * Many operations in NFSv4 require change_info4 in the reply. This function
+ * populates that from the info that we (should!) have already collected. In
+ * the event that we didn't get any pre-attrs, just zero out both.
+ */
+static void
+set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
+{
+	cinfo->atomic = (u32)(fhp->fh_pre_saved && fhp->fh_post_saved && !fhp->fh_no_atomic_attr);
+	cinfo->before_change = fhp->fh_pre_change;
+	cinfo->after_change = fhp->fh_post_change;
+
+	/*
+	 * If fetching the pre-change attributes failed, then we should
+	 * have already failed the whole operation. We could have still
+	 * failed to fetch post-change attributes however.
+	 *
+	 * If we didn't get post-op attrs, just zero-out the after
+	 * field since we don't know what it should be. If the pre_saved
+	 * field isn't set for some reason, throw warning and just copy
+	 * whatever is in the after field.
+	 */
+	if (WARN_ON_ONCE(!fhp->fh_pre_saved))
+		cinfo->before_change = 0;
+	if (!fhp->fh_post_saved)
+		cinfo->after_change = cinfo->before_change + 1;
+}
+
 static __be32
 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
 {
@@ -424,11 +458,11 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru
 	} else {
 		status = nfsd_lookup(rqstp, current_fh,
 				     open->op_fname, open->op_fnamelen, *resfh);
-		if (!status)
+		if (status == nfs_ok)
 			/* NFSv4 protocol requires change attributes even though
 			 * no change happened.
 			 */
-			fh_fill_both_attrs(current_fh);
+			status = fh_fill_both_attrs(current_fh);
 	}
 	if (status)
 		goto out;
@@ -1313,12 +1347,11 @@ try_again:
 		/* found a match */
 		if (ni->nsui_busy) {
 			/*  wait - and try again */
-			prepare_to_wait(&nn->nfsd_ssc_waitq, &wait,
-				TASK_INTERRUPTIBLE);
+			prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, TASK_IDLE);
 			spin_unlock(&nn->nfsd_ssc_lock);
 
 			/* allow 20secs for mount/unmount for now - revisit */
-			if (signal_pending(current) ||
+			if (kthread_should_stop() ||
 					(schedule_timeout(20*HZ) == 0)) {
 				finish_wait(&nn->nfsd_ssc_waitq, &wait);
 				kfree(work);