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Subject[PATCH 27/32] union-mount: Always create topmost directory on open
Date
From: Valerie Aurora (Henson) <vaurora@redhat.com>

When we open a directory, unconditionally create a matching directory
on the top-level. This way we don't have to go back and create all
the directories on the path to an element when we want to copy it up.

Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Valerie Aurora (Henson) <vaurora@redhat.com>
---
fs/namei.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index 4d68597..684619c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1265,8 +1265,9 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
if (err)
break;

- if ((nd->flags & LOOKUP_TOPMOST) &&
- (nd->um_flags & LAST_LOWLEVEL)) {
+ if ((nd->um_flags & LAST_LOWLEVEL) &&
+ (S_ISDIR(next.dentry->d_inode->i_mode) ||
+ (nd->flags & LOOKUP_TOPMOST))) {
struct dentry *dentry;

dentry = union_create_topmost(nd, &this, &next);
@@ -1330,8 +1331,9 @@ last_component:
if (err)
break;

- if ((nd->flags & LOOKUP_TOPMOST) &&
- (nd->um_flags & LAST_LOWLEVEL)) {
+ if ((nd->um_flags & LAST_LOWLEVEL) &&
+ (S_ISDIR(next.dentry->d_inode->i_mode) ||
+ (nd->flags & LOOKUP_TOPMOST))) {
struct dentry *dentry;

dentry = union_create_topmost(nd, &this, &next);
--
1.6.1.3


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