proc: Usable inode numbers for the namespace file descriptors.

[linux-2.6-block.git] / kernel / utsname.c

diff --git a/kernel/utsname.c b/kernel/utsname.c
index fdc619eb61ef7497fa7a841277cdfd6e874ecbe3..f6336d51d64c40a1759519ae0561c9ba07438ea8 100644 (file)
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -36,11 +36,18 @@ static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns,
                                          struct uts_namespace *old_ns)
 {
        struct uts_namespace *ns;
+       int err;
 
        ns = create_uts_ns();
        if (!ns)
                return ERR_PTR(-ENOMEM);
 
+       err = proc_alloc_inum(&ns->proc_inum);
+       if (err) {
+               kfree(ns);
+               return ERR_PTR(err);
+       }
+
        down_read(&uts_sem);
        memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
        ns->user_ns = get_user_ns(user_ns);
@@ -77,6 +84,7 @@ void free_uts_ns(struct kref *kref)
 
        ns = container_of(kref, struct uts_namespace, kref);
        put_user_ns(ns->user_ns);
+       proc_free_inum(ns->proc_inum);
        kfree(ns);
 }
 
@@ -114,11 +122,18 @@ static int utsns_install(struct nsproxy *nsproxy, void *new)
        return 0;
 }
 
+static unsigned int utsns_inum(void *vp)
+{
+       struct uts_namespace *ns = vp;
+
+       return ns->proc_inum;
+}
+
 const struct proc_ns_operations utsns_operations = {
        .name           = "uts",
        .type           = CLONE_NEWUTS,
        .get            = utsns_get,
        .put            = utsns_put,
        .install        = utsns_install,
+       .inum           = utsns_inum,
 };
-