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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2021-09-14 16:46:34 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2021-09-15 13:41:36 +0200
commit88d0adb5f13b1c52fbb7d755f6f79db18c2f0c2c (patch)
tree56f3ae60c2f50b6dc0d00c0bf3b7b148147b3fce /net/xfrm/xfrm_user.c
parentf8d858e607b2a36808ac6d4218f5f5203d7a7d63 (diff)
xfrm: notify default policy on update
This configuration knob is very sensible, it should be notified when changing. Fixes: 2d151d39073a ("xfrm: Add possibility to set the default to block if we have no policy") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_user.c')
-rw-r--r--net/xfrm/xfrm_user.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 90c88390f1fe..0eba0c27c665 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1961,6 +1961,36 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
return skb;
}
+static int xfrm_notify_userpolicy(struct net *net)
+{
+ struct xfrm_userpolicy_default *up;
+ int len = NLMSG_ALIGN(sizeof(*up));
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
+ if (nlh == NULL) {
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+
+ up = nlmsg_data(nlh);
+ up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
+ XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
+ up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
+ XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
+ up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
+ XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
+
+ nlmsg_end(skb, nlh);
+
+ return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
+}
+
static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr **attrs)
{
@@ -1984,6 +2014,7 @@ static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
rt_genid_bump_all(net);
+ xfrm_notify_userpolicy(net);
return 0;
}