ovl: add ovl_dentry_is_whiteout()

And use it instead of ovl_dentry_is_opaque() where appropriate.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index fdc7b14..b559221 100644 (file)
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -504,7 +504,7 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
                put_cred(override_creds(override_cred));
                put_cred(override_cred);
 
-               if (!ovl_dentry_is_opaque(dentry))
+               if (!ovl_dentry_is_whiteout(dentry))
                        err = ovl_create_upper(dentry, inode, stat, link,
                                                hardlink);
                else
@@ -842,14 +842,14 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
 
        if (overwrite) {
                if (old_opaque) {
-                       if (new->d_inode || !new_opaque) {
+                       if (!ovl_dentry_is_whiteout(new)) {
                                /* Whiteout source */
                                flags |= RENAME_WHITEOUT;
                        } else {
                                /* Switch whiteouts */
                                flags |= RENAME_EXCHANGE;
                        }
-               } else if (is_dir && !new->d_inode && new_opaque) {
+               } else if (is_dir && ovl_dentry_is_whiteout(new)) {
                        flags |= RENAME_EXCHANGE;
                        cleanup_whiteout = true;
                }

diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 95d0d86..51e7d58 100644 (file)
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -161,6 +161,7 @@ struct dentry *ovl_workdir(struct dentry *dentry);
 int ovl_want_write(struct dentry *dentry);
 void ovl_drop_write(struct dentry *dentry);
 bool ovl_dentry_is_opaque(struct dentry *dentry);
+bool ovl_dentry_is_whiteout(struct dentry *dentry);
 void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque);
 bool ovl_is_whiteout(struct dentry *dentry);
 const struct cred *ovl_override_creds(struct super_block *sb);

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index e296312..aa0427d 100644 (file)
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -209,6 +209,11 @@ bool ovl_dentry_is_opaque(struct dentry *dentry)
        return oe->opaque;
 }
 
+bool ovl_dentry_is_whiteout(struct dentry *dentry)
+{
+       return !dentry->d_inode && ovl_dentry_is_opaque(dentry);
+}
+
 void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque)
 {
        struct ovl_entry *oe = dentry->d_fsdata;