linux-kernel - [PATCH 05/30] Unionfs: interpose cleanup and fix for spliced dentries

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Date:	Fri, 28 Dec 2007 15:42:39 -0500
From:	Erez Zadok <ezk@...sunysb.edu>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	viro@....linux.org.uk, hch@...radead.org,
	Erez Zadok <ezk@...sunysb.edu>,
	Rachita Kothiyal <rachita@...sunysb.edu>
Subject: [PATCH 05/30] Unionfs: interpose cleanup and fix for spliced dentries

Fix unionfs_interpose to fill lower inode info when d_splice_alias returns
NULL.  Also cleanup impossible case (d_splice_alias doesn't return ERR_PTR).

Signed-off-by: Rachita Kothiyal <rachita@....cs.sunysb.edu>
Signed-off-by: Erez Zadok <ezk@...sunysb.edu>
---
 fs/unionfs/main.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/unionfs/main.c b/fs/unionfs/main.c
index 22aa6e6..ea8976d 100644
--- a/fs/unionfs/main.c
+++ b/fs/unionfs/main.c
@@ -149,9 +149,7 @@ skip:
 		break;
 	case INTERPOSE_LOOKUP:
 		spliced = d_splice_alias(inode, dentry);
-		if (IS_ERR(spliced)) {
-			err = PTR_ERR(spliced);
-		} else if (spliced && spliced != dentry) {
+		if (spliced && spliced != dentry) {
 			/*
 			 * d_splice can return a dentry if it was
 			 * disconnected and had to be moved.  We must ensure
@@ -169,6 +167,12 @@ skip:
 				unionfs_fill_inode(dentry, inode);
 			}
 			goto out_spliced;
+		} else if (!spliced) {
+			if (need_fill_inode) {
+				need_fill_inode = 0;
+				unionfs_fill_inode(dentry, inode);
+				goto out_spliced;
+			}
 		}
 		break;
 	case INTERPOSE_REVAL:
-- 
1.5.2.2

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