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authorDavid S. Miller <davem@davemloft.net>2008-10-31 00:17:34 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-31 00:17:34 -0700
commita1744d3bee19d3b9cbfb825ab316a101b9c9f109 (patch)
treec0e2324c09beca0eb5782eb5abf241ea2b7a4a11 /net/core/net_namespace.c
parent275f165fa970174f8a98205529750e8abb6c0a33 (diff)
parenta432226614c5616e3cfd211e0acffa0acfb4770c (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/wireless/p54/p54common.c
Diffstat (limited to 'net/core/net_namespace.c')
-rw-r--r--net/core/net_namespace.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 861b4cbf40d..55cffad2f32 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -324,6 +324,38 @@ void unregister_pernet_subsys(struct pernet_operations *module)
}
EXPORT_SYMBOL_GPL(unregister_pernet_subsys);
+int register_pernet_gen_subsys(int *id, struct pernet_operations *ops)
+{
+ int rv;
+
+ mutex_lock(&net_mutex);
+again:
+ rv = ida_get_new_above(&net_generic_ids, 1, id);
+ if (rv < 0) {
+ if (rv == -EAGAIN) {
+ ida_pre_get(&net_generic_ids, GFP_KERNEL);
+ goto again;
+ }
+ goto out;
+ }
+ rv = register_pernet_operations(first_device, ops);
+ if (rv < 0)
+ ida_remove(&net_generic_ids, *id);
+ mutex_unlock(&net_mutex);
+out:
+ return rv;
+}
+EXPORT_SYMBOL_GPL(register_pernet_gen_subsys);
+
+void unregister_pernet_gen_subsys(int id, struct pernet_operations *ops)
+{
+ mutex_lock(&net_mutex);
+ unregister_pernet_operations(ops);
+ ida_remove(&net_generic_ids, id);
+ mutex_unlock(&net_mutex);
+}
+EXPORT_SYMBOL_GPL(unregister_pernet_gen_subsys);
+
/**
* register_pernet_device - register a network namespace device
* @ops: pernet operations structure for the subsystem