diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-12-22 18:30:08 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-06 22:03:50 +0200 |
| commit | 7052e71b2d085f76800115d4a212dcaf82b86262 (patch) | |
| tree | 2d719cc7f0e189f4784cca5443e811191227b83e /fs | |
| parent | 953bab2cb35f8f6f2a0183c1b27ff7466f72bccc (diff) | |
mnt: Add MNT_UMOUNT flag
commit 590ce4bcbfb4e0462a720a4ad901e84416080bba upstream.
In some instances it is necessary to know if the the unmounting
process has begun on a mount. Add MNT_UMOUNT to make that reliably
testable.
This fix gets used in fixing locked mounts in MNT_DETACH
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/namespace.c | 4 | ||||
| -rw-r--r-- | fs/pnode.c | 1 |
2 files changed, 4 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 18df0af605ba..9f3c7e596b10 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1333,8 +1333,10 @@ static void umount_tree(struct mount *mnt, enum umount_tree_flags how) struct mount *p; /* Gather the mounts to umount */ - for (p = mnt; p; p = next_mnt(p, mnt)) + for (p = mnt; p; p = next_mnt(p, mnt)) { + p->mnt.mnt_flags |= MNT_UMOUNT; list_move(&p->mnt_list, &tmp_list); + } /* Hide the mounts from lookup_mnt and mnt_mounts */ list_for_each_entry(p, &tmp_list, mnt_list) { diff --git a/fs/pnode.c b/fs/pnode.c index bf012af709dd..ac3aa0d43b90 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -384,6 +384,7 @@ static void __propagate_umount(struct mount *mnt) if (child && list_empty(&child->mnt_mounts)) { list_del_init(&child->mnt_child); hlist_del_init_rcu(&child->mnt_hash); + child->mnt.mnt_flags |= MNT_UMOUNT; list_move_tail(&child->mnt_list, &mnt->mnt_list); } } |