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authorEric W. Biederman <ebiederm@xmission.com>2014-10-07 16:22:52 -0700
committerEric W. Biederman <ebiederm@xmission.com>2014-12-02 10:46:50 -0600
commit8486a7882b5ba906992fd78bbfcefaae7fe285cc (patch)
tree5b6f8175e8cce90109c60032370281c37c580a34
parentda362b09e42ee0bcaf0356afee6078b4f324baff (diff)
downloadlinux-8486a7882b5ba906992fd78bbfcefaae7fe285cc.tar.bz2
mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers.
Clear MNT_LOCKED in the callers of copy_tree except copy_mnt_ns, and collect_mounts. In copy_mnt_ns it is necessary to create an exact copy of a mount tree, so not clearing MNT_LOCKED is important. Similarly collect_mounts is used to take a snapshot of the mount tree for audit logging purposes and auditing using a faithful copy of the tree is important. This becomes particularly significant when we start setting MNT_LOCKED on rootfs to prevent it from being unmounted. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
-rw-r--r--fs/namespace.c1
-rw-r--r--fs/pnode.c1
2 files changed, 1 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 15d0328bd035..e8d1ffa7f132 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1613,7 +1613,6 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
if (IS_ERR(q))
return q;
- q->mnt.mnt_flags &= ~MNT_LOCKED;
q->mnt_mountpoint = mnt->mnt_mountpoint;
p = mnt;
diff --git a/fs/pnode.c b/fs/pnode.c
index aae331a5d03b..260ac8f898a4 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -242,6 +242,7 @@ static int propagate_one(struct mount *m)
child = copy_tree(last_source, last_source->mnt.mnt_root, type);
if (IS_ERR(child))
return PTR_ERR(child);
+ child->mnt.mnt_flags &= ~MNT_LOCKED;
mnt_set_mountpoint(m, mp, child);
last_dest = m;
last_source = child;