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Commit 8089352a authored by Al Viro's avatar Al Viro
Browse files

Mirror MS_KERNMOUNT in ->mnt_flags 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent d498b25a

fs/namespace.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1701,7 +1701,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path, 
{

{

	int err;

	int err;





	mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD);

	mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD | MNT_INTERNAL);





	down_write(&namespace_sem);

	down_write(&namespace_sem);

	/* Something was mounted here while we slept */

	/* Something was mounted here while we slept */

fs/super.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -937,6 +937,9 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void 
	if (!mnt)

	if (!mnt)

		goto out;

		goto out;





	if (flags & MS_KERNMOUNT)

		mnt->mnt_flags = MNT_INTERNAL;



	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {

	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {

		secdata = alloc_secdata();

		secdata = alloc_secdata();

		if (!secdata)

		if (!secdata)

include/linux/mount.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -45,6 +45,8 @@ struct mnt_namespace; 
#define MNT_PROPAGATION_MASK	(MNT_SHARED | MNT_UNBINDABLE)

#define MNT_PROPAGATION_MASK	(MNT_SHARED | MNT_UNBINDABLE)









#define MNT_INTERNAL	0x4000



struct vfsmount {

struct vfsmount {

	struct list_head mnt_hash;

	struct list_head mnt_hash;

	struct vfsmount *mnt_parent;	/* fs we are mounted on */

	struct vfsmount *mnt_parent;	/* fs we are mounted on */