diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2017-03-28 14:28:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-28 22:32:42 -0700 |
| commit | b5c9641d3d45e58dbcb35090345f863e5ade718d (patch) | |
| tree | 060f381cbc580619836a2742fecb3dd3647bd5ba /net/ipv4/devinet.c | |
| parent | 3b0228656dcb07a1c9fc81e8516475c2d7c4300e (diff) | |
| download | linux-b5c9641d3d45e58dbcb35090345f863e5ade718d.tar.bz2 | |
net: devinet: Add support for RTM_DELNETCONF
Send RTM_DELNETCONF notifications when a device is deleted. The message only
needs the device index, so modify inet_netconf_fill_devconf to skip devconf
references if it is NULL.
Allows a userspace cache to remove entries as devices are deleted.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/devinet.c')
| -rw-r--r-- | net/ipv4/devinet.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index fd3218cd1870..6d3602ec640c 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1802,6 +1802,9 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) goto nla_put_failure; + if (!devconf) + goto out; + if ((all || type == NETCONFA_FORWARDING) && nla_put_s32(skb, NETCONFA_FORWARDING, IPV4_DEVCONF(*devconf, FORWARDING)) < 0) @@ -1823,6 +1826,7 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex, IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0) goto nla_put_failure; +out: nlmsg_end(skb, nlh); return 0; @@ -2276,16 +2280,18 @@ out: return -ENOBUFS; } -static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf) +static void __devinet_sysctl_unregister(struct net *net, + struct ipv4_devconf *cnf, int ifindex) { struct devinet_sysctl_table *t = cnf->sysctl; - if (!t) - return; + if (t) { + cnf->sysctl = NULL; + unregister_net_sysctl_table(t->sysctl_header); + kfree(t); + } - cnf->sysctl = NULL; - unregister_net_sysctl_table(t->sysctl_header); - kfree(t); + inet_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL); } static int devinet_sysctl_register(struct in_device *idev) @@ -2307,7 +2313,9 @@ static int devinet_sysctl_register(struct in_device *idev) static void devinet_sysctl_unregister(struct in_device *idev) { - __devinet_sysctl_unregister(&idev->cnf); + struct net *net = dev_net(idev->dev); + + __devinet_sysctl_unregister(net, &idev->cnf, idev->dev->ifindex); neigh_sysctl_unregister(idev->arp_parms); } @@ -2382,9 +2390,9 @@ static __net_init int devinet_init_net(struct net *net) #ifdef CONFIG_SYSCTL err_reg_ctl: - __devinet_sysctl_unregister(dflt); + __devinet_sysctl_unregister(net, dflt, NETCONFA_IFINDEX_DEFAULT); err_reg_dflt: - __devinet_sysctl_unregister(all); + __devinet_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL); err_reg_all: if (tbl != ctl_forward_entry) kfree(tbl); @@ -2406,8 +2414,10 @@ static __net_exit void devinet_exit_net(struct net *net) tbl = net->ipv4.forw_hdr->ctl_table_arg; unregister_net_sysctl_table(net->ipv4.forw_hdr); - __devinet_sysctl_unregister(net->ipv4.devconf_dflt); - __devinet_sysctl_unregister(net->ipv4.devconf_all); + __devinet_sysctl_unregister(net, net->ipv4.devconf_dflt, + NETCONFA_IFINDEX_DEFAULT); + __devinet_sysctl_unregister(net, net->ipv4.devconf_all, + NETCONFA_IFINDEX_ALL); kfree(tbl); #endif kfree(net->ipv4.devconf_dflt); |