proc: Usable inode numbers for the namespace file descriptors.

[mirror_ubuntu-zesty-kernel.git] / ipc / namespace.c

diff --git a/ipc/namespace.c b/ipc/namespace.c
index 72c868277793456ee39b7c37cf518e61b60597dd..cf3386a51de25509f15c85871d447e95feee07fe 100644 (file)
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -26,9 +26,16 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
        if (ns == NULL)
                return ERR_PTR(-ENOMEM);
 
+       err = proc_alloc_inum(&ns->proc_inum);
+       if (err) {
+               kfree(ns);
+               return ERR_PTR(err);
+       }
+
        atomic_set(&ns->count, 1);
        err = mq_init_ns(ns);
        if (err) {
+               proc_free_inum(ns->proc_inum);
                kfree(ns);
                return ERR_PTR(err);
        }
@@ -111,6 +118,7 @@ static void free_ipc_ns(struct ipc_namespace *ns)
         */
        ipcns_notify(IPCNS_REMOVED);
        put_user_ns(ns->user_ns);
+       proc_free_inum(ns->proc_inum);
        kfree(ns);
 }
 
@@ -172,10 +180,18 @@ static int ipcns_install(struct nsproxy *nsproxy, void *new)
        return 0;
 }
 
+static unsigned int ipcns_inum(void *vp)
+{
+       struct ipc_namespace *ns = vp;
+
+       return ns->proc_inum;
+}
+
 const struct proc_ns_operations ipcns_operations = {
        .name           = "ipc",
        .type           = CLONE_NEWIPC,
        .get            = ipcns_get,
        .put            = ipcns_put,
        .install        = ipcns_install,
+       .inum           = ipcns_inum,
 };