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-rw-r--r--fs/inode.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/fs/inode.c b/fs/inode.c
index 210054157a49..d1e35b53bb23 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1570,11 +1570,24 @@ EXPORT_SYMBOL(bmap);
static void update_ovl_inode_times(struct dentry *dentry, struct inode *inode,
bool rcu)
{
- if (!rcu) {
- struct inode *realinode = d_real_inode(dentry);
+ struct dentry *upperdentry;
- if (unlikely(inode != realinode) &&
- (!timespec_equal(&inode->i_mtime, &realinode->i_mtime) ||
+ /*
+ * Nothing to do if in rcu or if non-overlayfs
+ */
+ if (rcu || likely(!(dentry->d_flags & DCACHE_OP_REAL)))
+ return;
+
+ upperdentry = d_real(dentry, NULL, 0, D_REAL_UPPER);
+
+ /*
+ * If file is on lower then we can't update atime, so no worries about
+ * stale mtime/ctime.
+ */
+ if (upperdentry) {
+ struct inode *realinode = d_inode(upperdentry);
+
+ if ((!timespec_equal(&inode->i_mtime, &realinode->i_mtime) ||
!timespec_equal(&inode->i_ctime, &realinode->i_ctime))) {
inode->i_mtime = realinode->i_mtime;
inode->i_ctime = realinode->i_ctime;