netlink: add mmap'ed netlink helper functions
Add helper functions for looking up mmap'ed frame headers, reading and
writing their status, allocating skbs with mmap'ed data areas and a poll
function.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index d8e9264..07c4738 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -15,10 +15,17 @@
return (struct nlmsghdr *)skb->data;
}
+enum netlink_skb_flags {
+ NETLINK_SKB_MMAPED = 0x1, /* Packet data is mmaped */
+ NETLINK_SKB_TX = 0x2, /* Packet was sent by userspace */
+ NETLINK_SKB_DELIVERED = 0x4, /* Packet was delivered */
+};
+
struct netlink_skb_parms {
struct scm_creds creds; /* Skb credentials */
__u32 portid;
__u32 dst_group;
+ __u32 flags;
struct sock *sk;
};