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authorEric W. Biederman <ebiederm@xmission.com>2014-12-22 19:12:07 -0600
committerEric W. Biederman <ebiederm@xmission.com>2015-04-02 20:34:19 -0500
commit411a938b5abc9cb126c41cccf5975ae464fe0f3e (patch)
tree730e8410fbeb2ec8190b9b2352abf80ffd56f0ce /fs/pnode.c
parent590ce4bcbfb4e0462a720a4ad901e84416080bba (diff)
downloadlinux-411a938b5abc9cb126c41cccf5975ae464fe0f3e.tar.bz2
mnt: Delay removal from the mount hash.
- Modify __lookup_mnt_hash_last to ignore mounts that have MNT_UMOUNTED set. - Don't remove mounts from the mount hash table in propogate_umount - Don't remove mounts from the mount hash table in umount_tree before the entire list of mounts to be umounted is selected. - Remove mounts from the mount hash table as the last thing that happens in the case where a mount has a parent in umount_tree. Mounts without parents are not hashed (by definition). This paves the way for delaying removal from the mount hash table even farther and fixing the MNT_LOCKED vs MNT_DETACH issue. Cc: stable@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/pnode.c')
-rw-r--r--fs/pnode.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/pnode.c b/fs/pnode.c
index ac3aa0d43b90..c27ae38ee250 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -383,7 +383,6 @@ 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);
}