diag: warn about missing first netlink attribute

The first netlink attribute (value 0) must always be defined as none/unspec.
This is correctly done in inet_diag.h, but other diag interfaces are wrong.

Because we cannot change an existing API, I add a comment to point the mistake
and avoid to propagate it in a new diag API in the future.

CC: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/netlink_diag.h b/include/uapi/linux/netlink_diag.h
index 4e31db4..f2159d3 100644 (file)
--- a/include/uapi/linux/netlink_diag.h
+++ b/include/uapi/linux/netlink_diag.h
@@ -33,6 +33,7 @@ struct netlink_diag_ring {
 };
 
 enum {
+       /* NETLINK_DIAG_NONE, standard nl API requires this attribute!  */
        NETLINK_DIAG_MEMINFO,
        NETLINK_DIAG_GROUPS,
        NETLINK_DIAG_RX_RING,

diff --git a/include/uapi/linux/packet_diag.h b/include/uapi/linux/packet_diag.h
index b2cc0cd..d08c63f 100644 (file)
--- a/include/uapi/linux/packet_diag.h
+++ b/include/uapi/linux/packet_diag.h
@@ -29,6 +29,7 @@ struct packet_diag_msg {
 };
 
 enum {
+       /* PACKET_DIAG_NONE, standard nl API requires this attribute!  */
        PACKET_DIAG_INFO,
        PACKET_DIAG_MCLIST,
        PACKET_DIAG_RX_RING,

diff --git a/include/uapi/linux/unix_diag.h b/include/uapi/linux/unix_diag.h
index b9e2a6a..1eb0b8d 100644 (file)
--- a/include/uapi/linux/unix_diag.h
+++ b/include/uapi/linux/unix_diag.h
@@ -31,6 +31,7 @@ struct unix_diag_msg {
 };
 
 enum {
+       /* UNIX_DIAG_NONE, standard nl API requires this attribute!  */
        UNIX_DIAG_NAME,
        UNIX_DIAG_VFS,
        UNIX_DIAG_PEER,