From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Thu, 10 Jan 2008 12:13:01 +0000 (-0500)
Subject: Unionfs: don't check parent dentries
X-Git-Url: https://git.fsl.cs.stonybrook.edu/?a=commitdiff_plain;h=ab26f54d895199f79e9ba133ef923450ceb0bcbb;p=unionfs-odf.git

Unionfs: don't check parent dentries

Parent dentries may not be locked and may change, so don't check them.  But
do check parent inodes if they are passed to the method.  Also, ensure the
checks are done only if no error occurred.

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/commonfops.c b/fs/unionfs/commonfops.c
index 55f016ee10..00500f6b14 100644
--- a/fs/unionfs/commonfops.c
+++ b/fs/unionfs/commonfops.c
@@ -680,7 +680,6 @@ out_nofree:
 		unionfs_copy_attr_times(dentry->d_parent->d_inode);
 		unionfs_copy_attr_times(inode);
 		unionfs_check_file(file);
-		unionfs_check_dentry(dentry->d_parent);
 		unionfs_check_inode(inode);
 	}
 	unionfs_read_unlock(inode->i_sb);
diff --git a/fs/unionfs/file.c b/fs/unionfs/file.c
index b63204285e..0c424f62c2 100644
--- a/fs/unionfs/file.c
+++ b/fs/unionfs/file.c
@@ -66,7 +66,6 @@ out:
 		/* copyup could cause parent dir times to change */
 		unionfs_copy_attr_times(file->f_path.dentry->d_parent->d_inode);
 		unionfs_check_file(file);
-		unionfs_check_dentry(file->f_path.dentry->d_parent);
 	}
 	unionfs_read_unlock(file->f_path.dentry->d_sb);
 	return err;
diff --git a/fs/unionfs/inode.c b/fs/unionfs/inode.c
index 12754a1d1d..087c5f2b20 100644
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -123,7 +123,6 @@ out:
 
 	unionfs_check_inode(parent);
 	if (!err) {
-		unionfs_check_dentry(dentry->d_parent);
 		unionfs_check_dentry(dentry);
 		unionfs_check_nd(nd);
 	}
@@ -173,14 +172,16 @@ static struct dentry *unionfs_lookup(struct inode *parent,
 	}
 
 	unionfs_check_inode(parent);
-	unionfs_check_dentry(dentry);
-	unionfs_check_dentry(dentry->d_parent);
-	unionfs_check_nd(nd);
-	if (!IS_ERR(ret))
+	if (!IS_ERR(ret)) {
+		unionfs_check_dentry(dentry);
+		unionfs_check_nd(nd);
 		unionfs_unlock_dentry(dentry);
+	}
 
-	if (dentry != dentry->d_parent)
+	if (dentry != dentry->d_parent) {
+		unionfs_check_dentry(dentry->d_parent);
 		unionfs_unlock_dentry(dentry->d_parent);
+	}
 	unionfs_read_unlock(dentry->d_sb);
 
 	return ret;
@@ -430,7 +431,8 @@ out:
 		unionfs_postcopyup_setmnt(dentry);
 
 	unionfs_check_inode(dir);
-	unionfs_check_dentry(dentry);
+	if (!err)
+		unionfs_check_dentry(dentry);
 	unionfs_unlock_dentry(dentry);
 	unionfs_read_unlock(dentry->d_sb);
 
@@ -632,7 +634,8 @@ out:
 		unionfs_postcopyup_setmnt(dentry);
 
 	unionfs_check_inode(dir);
-	unionfs_check_dentry(dentry);
+	if (!err)
+		unionfs_check_dentry(dentry);
 	unionfs_unlock_dentry(dentry);
 	unionfs_read_unlock(dentry->d_sb);
 
@@ -927,8 +930,8 @@ static int unionfs_setattr(struct dentry *dentry, struct iattr *ia)
 	/* if setattr succeeded, then parent dir may have changed */
 	unionfs_copy_attr_times(dentry->d_parent->d_inode);
 out:
-	unionfs_check_dentry(dentry);
-	unionfs_check_dentry(dentry->d_parent);
+	if (!err)
+		unionfs_check_dentry(dentry);
 	unionfs_unlock_dentry(dentry);
 	unionfs_read_unlock(dentry->d_sb);