Messages in this thread Patch in this message | | | From | Lucian Adrian Grijincu <> | Subject | [PATCH 18/24] sysctl: ipv4: register /proc/sys/net/ipv4/conf empty directory | Date | Sat, 2 Apr 2011 04:53:32 +0200 |
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This does not change any semantics: it just adds a new header that will be used in the next patch as a parent for all headers for all /proc/sys/net/ipv4/conf/DEVNAME entries.
For now, all interface headers for /proc/sys/net/ipv4/conf/DEVNAME will be bound to this header as opposed to another one from above, but this shouldn't affect performance or behaviour.
Signed-off-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com> --- include/net/netns/ipv4.h | 9 +++++---- net/ipv4/devinet.c | 25 +++++++++++++++++++++++-- 2 files changed, 28 insertions(+), 6 deletions(-)
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 542195d..cdb8307 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -15,10 +15,11 @@ struct sock; struct netns_ipv4 { #ifdef CONFIG_SYSCTL - struct ctl_table_header *forw_hdr; - struct ctl_table_header *frags_hdr; - struct ctl_table_header *ipv4_hdr; - struct ctl_table_header *route_hdr; + struct ctl_table_header *forw_hdr; /* /proc/sys/net/ipv4/ip_forward */ + struct ctl_table_header *conf_hdr; /* /proc/sys/net/ipv4/conf/ */ + struct ctl_table_header *frags_hdr; /* /proc/sys/net/ipv4/ipfrag_* */ + struct ctl_table_header *ipv4_hdr; /* see @ipv4_net_table */ + struct ctl_table_header *route_hdr; /* /proc/sys/net/ipv4/route/flush */ #endif struct ipv4_devconf *devconf_all; struct ipv4_devconf *devconf_dflt; diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 551786f..a31cc90 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1698,6 +1698,18 @@ static void devinet_sysctl_unregister(struct in_device *idev) neigh_sysctl_unregister(idev->arp_parms); } + +/* empty entry for '/proc/sys/net/ipv4/conf/' */ +static __net_initdata struct ctl_table empty[1]; +static __net_initdata struct ctl_table ipv4_conf_skel[] = { + { + .procname = "conf", + .mode = 0555, + .child = empty, + }, + { }, +}; + static struct ctl_table ctl_forward_entry[] = { { .procname = "ip_forward", @@ -1712,7 +1724,7 @@ static struct ctl_table ctl_forward_entry[] = { { }, }; -static __net_initdata struct ctl_path net_ipv4_path[] = { +static __net_initdata const struct ctl_path net_ipv4_path[] = { { .procname = "net", }, { .procname = "ipv4", }, { }, @@ -1725,7 +1737,7 @@ static __net_init int devinet_init_net(struct net *net) struct ipv4_devconf *all, *dflt; #ifdef CONFIG_SYSCTL struct ctl_table *tbl = ctl_forward_entry; - struct ctl_table_header *forw_hdr; + struct ctl_table_header *forw_hdr, *conf_hdr; #endif err = -ENOMEM; @@ -1753,6 +1765,12 @@ static __net_init int devinet_init_net(struct net *net) } #ifdef CONFIG_SYSCTL + err = -ENOMEM; + conf_hdr = register_net_sysctl_table(net, net_ipv4_path, ipv4_conf_skel); + if (conf_hdr == NULL) + goto err_reg_conf; + net->ipv4.conf_hdr = conf_hdr; + err = __devinet_sysctl_register(net, "all", all); if (err < 0) goto err_reg_all; @@ -1778,6 +1796,8 @@ err_reg_ctl: err_reg_dflt: __devinet_sysctl_unregister(all); err_reg_all: + unregister_net_sysctl_table(conf_hdr); +err_reg_conf: if (tbl != ctl_forward_entry) kfree(tbl); err_alloc_ctl: @@ -1800,6 +1820,7 @@ static __net_exit void devinet_exit_net(struct net *net) unregister_net_sysctl_table(net->ipv4.forw_hdr); __devinet_sysctl_unregister(net->ipv4.devconf_dflt); __devinet_sysctl_unregister(net->ipv4.devconf_all); + unregister_net_sysctl_table(net->ipv4.conf_hdr); kfree(tbl); #endif kfree(net->ipv4.devconf_dflt); -- 1.7.5.rc0
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