[IPSEC] Turn km_event.data into a union

This patch turns km_event.data into a union.  This makes code that
uses it clearer.
  
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 17 insertions, 21 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index aaa0f5f330e2..fda356e81014 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -173,7 +173,12 @@ enum {
 /* callback structure passed from either netlink or pfkey */
 struct km_event
 {
-        u32     data;
+        union {
+                u32 hard;
+                u32 proto;
+                u32 byid;
+        } data;
+
         u32     seq;
         u32     pid;
         u32     event;
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 560c93c10890..3fae5c4b48f6 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1293,13 +1293,6 @@ static int key_notify_sa(struct xfrm_state *x, struct km_event *c)
         if (c->event == XFRM_SAP_DELETED)
                 hsc = 0;
 
-        if (c->event == XFRM_SAP_EXPIRED) {
-                if (c->data)
-                        hsc = 2;
-                else
-                        hsc = 1;
-        }
-
         skb = pfkey_xfrm_state2msg(x, 0, hsc);
 
         if (IS_ERR(skb))
@@ -1534,7 +1527,7 @@ static int key_notify_sa_flush(struct km_event *c)
         if (!skb)
                 return -ENOBUFS;
         hdr = (struct sadb_msg *) skb_put(skb, sizeof(struct sadb_msg));
-        hdr->sadb_msg_satype = pfkey_proto2satype(c->data);
+        hdr->sadb_msg_satype = pfkey_proto2satype(c->data.proto);
         hdr->sadb_msg_seq = c->seq;
         hdr->sadb_msg_pid = c->pid;
         hdr->sadb_msg_version = PF_KEY_V2;
@@ -1556,7 +1549,7 @@ static int pfkey_flush(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hd
                 return -EINVAL;
 
         xfrm_state_flush(proto);
-        c.data = proto;
+        c.data.proto = proto;
         c.seq = hdr->sadb_msg_seq;
         c.pid = hdr->sadb_msg_pid;
         c.event = XFRM_SAP_FLUSHED;
@@ -1969,7 +1962,7 @@ static int key_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c
         out_hdr = (struct sadb_msg *) out_skb->data;
         out_hdr->sadb_msg_version = PF_KEY_V2;
 
-        if (c->data && c->event == XFRM_SAP_DELETED)
+        if (c->data.byid && c->event == XFRM_SAP_DELETED)
                 out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
         else
                 out_hdr->sadb_msg_type = event2poltype(c->event);
@@ -2180,7 +2173,7 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
         c.seq = hdr->sadb_msg_seq;
         c.pid = hdr->sadb_msg_pid;
         if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
-                c.data = 1; // to signal pfkey of SADB_X_SPDDELETE2
+                c.data.byid = 1;
                 c.event = XFRM_SAP_DELETED;
                 km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
         } else {
@@ -2460,7 +2453,7 @@ static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c)
         int hard;
         int hsc;
 
-        hard = c->data;
+        hard = c->data.hard;
         if (hard)
                 hsc = 2;
         else
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 94f7416a4ab0..e068bd721050 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -835,7 +835,7 @@ static void km_state_expired(struct xfrm_state *x, int hard)
 {
         struct km_event c;
 
-        c.data = hard;
+        c.data.hard = hard;
         c.event = XFRM_SAP_EXPIRED;
         km_state_notify(x, &c);
 
@@ -883,8 +883,7 @@ void km_policy_expired(struct xfrm_policy *pol, int dir, int hard)
 {
         struct km_event c;
 
-        c.data = hard;
-        c.data = hard;
+        c.data.hard = hard;
         c.event = XFRM_SAP_EXPIRED;
         km_policy_notify(pol, dir, &c);
 
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index bd8e6882c083..4d3237d08ffb 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -900,7 +900,7 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma
         struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
 
         xfrm_state_flush(p->proto);
-        c.data = p->proto;
+        c.data.proto = p->proto;
         c.event = XFRM_SAP_FLUSHED;
         c.seq = nlh->nlmsg_seq;
         c.pid = nlh->nlmsg_pid;
@@ -1129,14 +1129,13 @@ nlmsg_failure:
 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
 {
         struct sk_buff *skb;
-        int hard = c ->data;
 
         /* fix to do alloc using NLM macros */
         skb = alloc_skb(sizeof(struct xfrm_user_expire) + 16, GFP_ATOMIC);
         if (skb == NULL)
                 return -ENOMEM;
 
-        if (build_expire(skb, x, hard) < 0)
+        if (build_expire(skb, x, c->data.hard) < 0)
                 BUG();
 
         NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE;
@@ -1162,7 +1161,7 @@ static int xfrm_notify_sa_flush(struct km_event *c)
         nlh->nlmsg_flags = 0;
 
         p = NLMSG_DATA(nlh);
-        p->proto = c->data;
+        p->proto = c->data.proto;
 
         nlh->nlmsg_len = skb->tail - b;
 
@@ -1404,7 +1403,7 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve
         if (skb == NULL)
                 return -ENOMEM;
 
-        if (build_polexpire(skb, xp, dir, c->data) < 0)
+        if (build_polexpire(skb, xp, dir, c->data.hard) < 0)
                 BUG();
 
         NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE;