1 files changed, 25 insertions, 10 deletions

diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 641d9ee97f91..3309b1912241 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -155,7 +155,7 @@ static int ovl_set_opaque(struct dentry *dentry, struct dentry *upperdentry)
 static void ovl_instantiate(struct dentry *dentry, struct inode *inode,
 			    struct dentry *newdentry, bool hardlink)
 {
-	ovl_dentry_version_inc(dentry->d_parent);
+	ovl_dentry_version_inc(dentry->d_parent, false);
 	ovl_dentry_set_upper_alias(dentry);
 	if (!hardlink) {
 		ovl_inode_update(inode, newdentry);
@@ -481,17 +481,30 @@ out_cleanup:
 }
 
 static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
-			      struct cattr *attr, struct dentry *hardlink)
+			      struct cattr *attr, struct dentry *hardlink,
+			      bool origin)
 {
 	int err;
 	const struct cred *old_cred;
 	struct cred *override_cred;
+	struct dentry *parent = dentry->d_parent;
 
-	err = ovl_copy_up(dentry->d_parent);
+	err = ovl_copy_up(parent);
 	if (err)
 		return err;
 
 	old_cred = ovl_override_creds(dentry->d_sb);
+
+	/*
+	 * When linking a file with copy up origin into a new parent, mark the
+	 * new parent dir "impure".
+	 */
+	if (origin) {
+		err = ovl_set_impure(parent, ovl_dentry_upper(parent));
+		if (err)
+			goto out_revert_creds;
+	}
+
 	err = -ENOMEM;
 	override_cred = prepare_creds();
 	if (override_cred) {
@@ -550,7 +563,7 @@ static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev,
 	inode_init_owner(inode, dentry->d_parent->d_inode, mode);
 	attr.mode = inode->i_mode;
 
-	err = ovl_create_or_link(dentry, inode, &attr, NULL);
+	err = ovl_create_or_link(dentry, inode, &attr, NULL, false);
 	if (err)
 		iput(inode);
 
@@ -609,7 +622,8 @@ static int ovl_link(struct dentry *old, struct inode *newdir,
 	inode = d_inode(old);
 	ihold(inode);
 
-	err = ovl_create_or_link(new, inode, NULL, ovl_dentry_upper(old));
+	err = ovl_create_or_link(new, inode, NULL, ovl_dentry_upper(old),
+				 ovl_type_origin(old));
 	if (err)
 		iput(inode);
 
@@ -678,7 +692,7 @@ static int ovl_remove_and_whiteout(struct dentry *dentry, bool is_dir)
 	if (flags)
 		ovl_cleanup(wdir, upper);
 
-	ovl_dentry_version_inc(dentry->d_parent);
+	ovl_dentry_version_inc(dentry->d_parent, true);
 out_d_drop:
 	d_drop(dentry);
 	dput(whiteout);
@@ -728,7 +742,7 @@ static int ovl_remove_upper(struct dentry *dentry, bool is_dir)
 		err = vfs_rmdir(dir, upper);
 	else
 		err = vfs_unlink(dir, upper, NULL);
-	ovl_dentry_version_inc(dentry->d_parent);
+	ovl_dentry_version_inc(dentry->d_parent, ovl_type_origin(dentry));
 
 	/*
 	 * Keeping this dentry hashed would mean having to release
@@ -819,7 +833,7 @@ static char *ovl_get_redirect(struct dentry *dentry, bool samedir)
 		goto out;
 	}
 
-	buf = ret = kmalloc(buflen, GFP_TEMPORARY);
+	buf = ret = kmalloc(buflen, GFP_KERNEL);
 	if (!buf)
 		goto out;
 
@@ -1075,8 +1089,9 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
 			drop_nlink(d_inode(new));
 	}
 
-	ovl_dentry_version_inc(old->d_parent);
-	ovl_dentry_version_inc(new->d_parent);
+	ovl_dentry_version_inc(old->d_parent,
+			       !overwrite && ovl_type_origin(new));
+	ovl_dentry_version_inc(new->d_parent, ovl_type_origin(old));
 
 out_dput:
 	dput(newdentry);