| From | Valerie Aurora <> | Subject | [PATCH 03/34] VFS: Add CL_NO_SLAVE flag to clone_mnt()/copy_tree() | Date | Thu, 16 Sep 2010 15:11:54 -0700 |
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Passing the CL_NO_SLAVE flag to clone_mnt() causes the clone to fail if the source mnt is a slave.
Signed-off-by: Valerie Aurora <vaurora@redhat.com> --- fs/namespace.c | 3 +++ fs/pnode.h | 1 + 2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/fs/namespace.c b/fs/namespace.c index eeb4c22..6956062 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -565,6 +565,9 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root, if ((flag & CL_NO_SHARED) && (IS_MNT_SHARED(old))) return ERR_PTR(-EINVAL); + if ((flag & CL_NO_SLAVE) && (IS_MNT_SLAVE(old))) + return ERR_PTR(-EINVAL); + mnt = alloc_vfsmnt(old->mnt_devname); if (!mnt) return ERR_PTR(-ENOMEM); diff --git a/fs/pnode.h b/fs/pnode.h index bcb3c47..8920e47 100644 --- a/fs/pnode.h +++ b/fs/pnode.h @@ -23,6 +23,7 @@ #define CL_MAKE_SHARED 0x08 #define CL_PRIVATE 0x10 #define CL_NO_SHARED 0x20 +#define CL_NO_SLAVE 0x40 static inline void set_mnt_shared(struct vfsmount *mnt) { -- 1.6.3.3
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