On Wed, Mar 07, 2018 at 10:02:20AM +0200, Amir Goldstein wrote:
> On Tue, Mar 6, 2018 at 10:54 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote:
> > When we create a hardlink to a metacopy upper file, first the redirect
> > on that inode. Path based lookup will not work with newly created link
> > and redirect will solve that issue.
> >
> > Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
> > ---
> > fs/overlayfs/dir.c | 18 ++++++++++++++----
> > 1 file changed, 14 insertions(+), 4 deletions(-)
> >
> > diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
> > index b955f6fede06..da5c4b8ee919 100644
> > --- a/fs/overlayfs/dir.c
> > +++ b/fs/overlayfs/dir.c
> > @@ -24,6 +24,8 @@ module_param_named(redirect_max, ovl_redirect_max, ushort, 0644);
> > MODULE_PARM_DESC(ovl_redirect_max,
> > "Maximum length of absolute redirect xattr value");
> >
> > +static int ovl_set_redirect(struct dentry *dentry, bool samedir);
> > +
> > int ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
> > {
> > int err;
> > @@ -468,6 +470,9 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
> > const struct cred *old_cred;
> > struct cred *override_cred;
> > struct dentry *parent = dentry->d_parent;
> > + struct dentry *hardlink_upper;
> > +
> > + hardlink_upper = hardlink ? ovl_dentry_upper(hardlink) : NULL;
>
> IMO it would be nicer to pass overlay hardlink dentry all the way to
> ovl_create_real() and then just:
>
> if (hardlink) {
> err = ovl_do_link(ovl_dentry_upper(hardlink), dir,
> newdentry, debug);
Ok, I will look into it and modify if it does not turn out to be
significant change.
Vivek
>
> Thanks,
> Amir.
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