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| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-10-07 16:22:52 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2014-12-02 10:46:50 -0600 |
| commit | 8486a7882b5ba906992fd78bbfcefaae7fe285cc (patch) | |
| tree | 5b6f8175e8cce90109c60032370281c37c580a34 | |
| parent | da362b09e42ee0bcaf0356afee6078b4f324baff (diff) | |
| download | linux-8486a7882b5ba906992fd78bbfcefaae7fe285cc.tar.gz linux-8486a7882b5ba906992fd78bbfcefaae7fe285cc.tar.bz2 linux-8486a7882b5ba906992fd78bbfcefaae7fe285cc.zip | |
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.c | 1 | ||||
| -rw-r--r-- | fs/pnode.c | 1 |
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; |