From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: [PATCH net-next 12/19] net neighbour: Convert to use register_net_sysctl Date: Thu, 19 Apr 2012 16:38:03 -0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: , "Serge E. Hallyn" , Gao feng , pablo@netfilter.org, Stephen Hemminger , Pavel Emelyanov To: David Miller Return-path: Received: from out02.mta.xmission.com ([166.70.13.232]:53256 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753314Ab2DSXeF (ORCPT ); Thu, 19 Apr 2012 19:34:05 -0400 In-Reply-To: (Eric W. Biederman's message of "Thu, 19 Apr 2012 16:17:10 -0700") Sender: netdev-owner@vger.kernel.org List-ID: Using an ascii path to register_net_sysctl as opposed to the slightly awkward ctl_path allows for much simpler code. We no longer need to malloc dev_name to keep it alive the length of our sysctl register instead we can use a small temporary buffer on the stack. Signed-off-by: Eric W. Biederman --- net/core/neighbour.c | 33 ++++++--------------------------- 1 files changed, 6 insertions(+), 27 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 0c2df3d..fadaa81 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -2799,7 +2799,6 @@ enum { static struct neigh_sysctl_table { struct ctl_table_header *sysctl_header; struct ctl_table neigh_vars[NEIGH_VAR_MAX + 1]; - char *dev_name; } neigh_sysctl_template __read_mostly = { .neigh_vars = { [NEIGH_VAR_MCAST_PROBE] = { @@ -2925,19 +2924,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, { struct neigh_sysctl_table *t; const char *dev_name_source = NULL; - -#define NEIGH_CTL_PATH_ROOT 0 -#define NEIGH_CTL_PATH_PROTO 1 -#define NEIGH_CTL_PATH_NEIGH 2 -#define NEIGH_CTL_PATH_DEV 3 - - struct ctl_path neigh_path[] = { - { .procname = "net", }, - { .procname = "proto", }, - { .procname = "neigh", }, - { .procname = "default", }, - { }, - }; + char neigh_path[ sizeof("net//neigh/") + IFNAMSIZ + IFNAMSIZ ]; t = kmemdup(&neigh_sysctl_template, sizeof(*t), GFP_KERNEL); if (!t) @@ -2965,7 +2952,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, memset(&t->neigh_vars[NEIGH_VAR_GC_INTERVAL], 0, sizeof(t->neigh_vars[NEIGH_VAR_GC_INTERVAL])); } else { - dev_name_source = neigh_path[NEIGH_CTL_PATH_DEV].procname; + dev_name_source = "default"; t->neigh_vars[NEIGH_VAR_GC_INTERVAL].data = (int *)(p + 1); t->neigh_vars[NEIGH_VAR_GC_THRESH1].data = (int *)(p + 1) + 1; t->neigh_vars[NEIGH_VAR_GC_THRESH2].data = (int *)(p + 1) + 2; @@ -2988,23 +2975,16 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].extra1 = dev; } - t->dev_name = kstrdup(dev_name_source, GFP_KERNEL); - if (!t->dev_name) - goto free; - - neigh_path[NEIGH_CTL_PATH_DEV].procname = t->dev_name; - neigh_path[NEIGH_CTL_PATH_PROTO].procname = p_name; - + snprintf(neigh_path, sizeof(neigh_path), "net/%s/neigh/%s", + p_name, dev_name_source); t->sysctl_header = - register_net_sysctl_table(neigh_parms_net(p), neigh_path, t->neigh_vars); + register_net_sysctl(neigh_parms_net(p), neigh_path, t->neigh_vars); if (!t->sysctl_header) - goto free_procname; + goto free; p->sysctl_table = t; return 0; -free_procname: - kfree(t->dev_name); free: kfree(t); err: @@ -3018,7 +2998,6 @@ void neigh_sysctl_unregister(struct neigh_parms *p) struct neigh_sysctl_table *t = p->sysctl_table; p->sysctl_table = NULL; unregister_net_sysctl_table(t->sysctl_header); - kfree(t->dev_name); kfree(t); } } -- 1.7.2.5