From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/fs/overlayfs/ovl_entry.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/kernel/fs/overlayfs/ovl_entry.h b/kernel/fs/overlayfs/ovl_entry.h
index 200efb3..c5d9a02 100644
--- a/kernel/fs/overlayfs/ovl_entry.h
+++ b/kernel/fs/overlayfs/ovl_entry.h
@@ -31,6 +31,7 @@
};
struct ovl_layer {
+ /* ovl_free_fs() relies on @mnt being the first member! */
struct vfsmount *mnt;
/* Trap in ovl inode cache */
struct inode *trap;
@@ -41,6 +42,14 @@
int fsid;
};
+/*
+ * ovl_free_fs() relies on @mnt being the first member when unmounting
+ * the private mounts created for each layer. Let's check both the
+ * offset and type.
+ */
+static_assert(offsetof(struct ovl_layer, mnt) == 0);
+static_assert(__same_type(typeof_member(struct ovl_layer, mnt), struct vfsmount *));
+
struct ovl_path {
const struct ovl_layer *layer;
struct dentry *dentry;
--
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