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| author | David S. Miller | 2008-10-31 08:17:34 +0100 |
|---|---|---|
| committer | David S. Miller | 2008-10-31 08:17:34 +0100 |
| commit | a1744d3bee19d3b9cbfb825ab316a101b9c9f109 (patch) | |
| tree | c0e2324c09beca0eb5782eb5abf241ea2b7a4a11 /net/core/net_namespace.c | |
| parent | pci: use pci_ioremap_bar() in drivers/net (diff) | |
| parent | xfrm: do not leak ESRCH to user space (diff) | |
| download | kernel-qcow2-linux-a1744d3bee19d3b9cbfb825ab316a101b9c9f109.tar.gz kernel-qcow2-linux-a1744d3bee19d3b9cbfb825ab316a101b9c9f109.tar.xz kernel-qcow2-linux-a1744d3bee19d3b9cbfb825ab316a101b9c9f109.zip | |
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.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 861b4cbf40db..55cffad2f328 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 |