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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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