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-rw-r--r--fs/namespace.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 6d499ab254b7..7cd642409165 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1937,6 +1937,9 @@ struct vfsmount *clone_private_mount(const struct path *path)
if (IS_ERR(new_mnt))
return ERR_CAST(new_mnt);
+ /* Longterm mount to be removed by kern_unmount*() */
+ new_mnt->mnt_ns = MNT_NS_INTERNAL;
+
return &new_mnt->mnt;
}
EXPORT_SYMBOL_GPL(clone_private_mount);
@@ -3863,6 +3866,19 @@ void kern_unmount(struct vfsmount *mnt)
}
EXPORT_SYMBOL(kern_unmount);
+void kern_unmount_array(struct vfsmount *mnt[], unsigned int num)
+{
+ unsigned int i;
+
+ for (i = 0; i < num; i++)
+ if (mnt[i])
+ real_mount(mnt[i])->mnt_ns = NULL;
+ synchronize_rcu_expedited();
+ for (i = 0; i < num; i++)
+ mntput(mnt[i]);
+}
+EXPORT_SYMBOL(kern_unmount_array);
+
bool our_mnt(struct vfsmount *mnt)
{
return check_mnt(real_mount(mnt));