From 8089352a13b785d4e0df63d87bd2b71c76bb9aee Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 5 Feb 2010 09:30:46 -0500 Subject: [PATCH] Mirror MS_KERNMOUNT in ->mnt_flags Signed-off-by: Al Viro --- fs/namespace.c | 2 +- fs/super.c | 3 +++ include/linux/mount.h | 2 ++ 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/namespace.c b/fs/namespace.c index b0b15cc2117c..ffa3843404e0 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1701,7 +1701,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path, { int err; - mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD); + mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD | MNT_INTERNAL); down_write(&namespace_sem); /* Something was mounted here while we slept */ diff --git a/fs/super.c b/fs/super.c index 903896ec7c73..f35ac6022109 100644 --- a/fs/super.c +++ b/fs/super.c @@ -937,6 +937,9 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void if (!mnt) goto out; + if (flags & MS_KERNMOUNT) + mnt->mnt_flags = MNT_INTERNAL; + if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) { secdata = alloc_secdata(); if (!secdata) diff --git a/include/linux/mount.h b/include/linux/mount.h index 163896137ab5..ca726ebf50a3 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -45,6 +45,8 @@ struct mnt_namespace; #define MNT_PROPAGATION_MASK (MNT_SHARED | MNT_UNBINDABLE) +#define MNT_INTERNAL 0x4000 + struct vfsmount { struct list_head mnt_hash; struct vfsmount *mnt_parent; /* fs we are mounted on */ -- 2.20.1