From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 28 Dec 2007 15:53:44 +0000 (-0500)
Subject: Unionfs: don't check parent dentries
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=8e03c25332c1c1e351cfeba0e32c85bedb899d31;p=unionfs-2.6.27.y.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 b8357a726ec..2c32ada1612 100644
--- a/fs/unionfs/commonfops.c
+++ b/fs/unionfs/commonfops.c
@@ -588,7 +588,6 @@ 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 b63204285e9..0c424f62c2a 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 740d36466da..6095c4f459e 100644
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -157,7 +157,6 @@ out:
 
 	unionfs_check_inode(parent);
 	if (!err) {
-		unionfs_check_dentry(dentry->d_parent);
 		unionfs_check_dentry(dentry);
 		unionfs_check_nd(nd);
 	}
@@ -207,14 +206,16 @@ 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;
@@ -520,8 +521,7 @@ out:
 
 	unionfs_check_inode(parent);
 	if (!err)
-		unionfs_check_dentry(dentry->d_parent);
-	unionfs_check_dentry(dentry);
+		unionfs_check_dentry(dentry);
 	unionfs_unlock_dentry(dentry);
 	unionfs_read_unlock(dentry->d_sb);
 	return err;
@@ -815,8 +815,7 @@ out:
 
 	unionfs_check_inode(parent);
 	if (!err)
-		unionfs_check_dentry(dentry->d_parent);
-	unionfs_check_dentry(dentry);
+		unionfs_check_dentry(dentry);
 	unionfs_unlock_dentry(dentry);
 	unionfs_read_unlock(dentry->d_sb);
 	return err;
@@ -1110,8 +1109,8 @@ 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);