[NETLINK]: Correctly set NLM_F_MULTI without checking the pid

This patch rectifies some rtnetlink message builders that derive the
flags from the pid. It is now explicit like the other cases
which get it right. Also fixes half a dozen dumpers which did not
set NLM_F_MULTI at all.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 5 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 56a20f014b8..63bd8866518 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -178,14 +178,14 @@ rtattr_failure:
 
 
 static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
-                                 int type, u32 pid, u32 seq, u32 change)
+                                 int type, u32 pid, u32 seq, u32 change, 
+                                 unsigned int flags)
 {
         struct ifinfomsg *r;
         struct nlmsghdr  *nlh;
         unsigned char    *b = skb->tail;
 
-        nlh = NLMSG_PUT(skb, pid, seq, type, sizeof(*r));
-        if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+        nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags);
         r = NLMSG_DATA(nlh);
         r->ifi_family = AF_UNSPEC;
         r->ifi_type = dev->type;
@@ -275,7 +275,10 @@ static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *c
         for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
                 if (idx < s_idx)
                         continue;
-                if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, 0) <= 0)
+                if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK,
+                                          NETLINK_CB(cb->skb).pid,
+                                          cb->nlh->nlmsg_seq, 0,
+                                          NLM_F_MULTI) <= 0)
                         break;
         }
         read_unlock(&dev_base_lock);
@@ -449,7 +452,7 @@ void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
         if (!skb)
                 return;
 
-        if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change) < 0) {
+        if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change, 0) < 0) {
                 kfree_skb(skb);
                 return;
         }