namespaces: mqueue ns: move mqueue_mnt into struct ipc_namespace

Move mqueue vfsmount plus a few tunables into the ipc_namespace struct.
The CONFIG_IPC_NS boolean and the ipc_namespace struct will serve both the
posix message queue namespaces and the SYSV ipc namespaces.

The sysctl code will be fixed separately in patch 3.  After just this
patch, making a change to posix mqueue tunables always changes the values
in the initial ipc namespace.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/ipc/namespace.c b/ipc/namespace.c
index 9171d948751e..4b4dc6d847f1 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -25,6 +25,7 @@ static struct ipc_namespace *clone_ipc_ns(struct ipc_namespace *old_ns)
         sem_init_ns(ns);
         msg_init_ns(ns);
         shm_init_ns(ns);
+        mq_init_ns(ns);
 
         /*
          * msgmni has already been computed for the new ipc ns.
@@ -101,6 +102,7 @@ void free_ipc_ns(struct kref *kref)
         sem_exit_ns(ns);
         msg_exit_ns(ns);
         shm_exit_ns(ns);
+        mq_exit_ns(ns);
         kfree(ns);
         atomic_dec(&nr_ipc_ns);