net: ynl: prefix uAPI header include with uapi/

To keep things simple we used to include the uAPI header
in the kernel in the #include <linux/$family.h> format.
This works well enough, most of the genl families should
have headers in include/net/ so linux/$family.h ends up
referring to the uAPI header, anyway. And if it doesn't
no big deal, we'll just include more info than we need.

Unless that is there is a naming conflict. Someone recently
created include/linux/psp.h which will be a problem when
supporting the PSP protocol. (I'm talking about
work-in-progress patches, but it's just a proof that assuming
lack of name conflicts was overly optimistic.)
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/netdev-genl-gen.c

@@ -8,7 +8,7 @@
 
 #include "netdev-genl-gen.h"
 
-#include <linux/netdev.h>
+#include <uapi/linux/netdev.h>
 
 /* NETDEV_CMD_DEV_GET - do */
 static const struct nla_policy netdev_dev_get_nl_policy[NETDEV_A_DEV_IFINDEX + 1] = {

net/core/netdev-genl-gen.h

@@ -9,7 +9,7 @@
 #include <net/netlink.h>
 #include <net/genetlink.h>
 
-#include <linux/netdev.h>
+#include <uapi/linux/netdev.h>
 
 int netdev_nl_dev_get_doit(struct sk_buff *skb, struct genl_info *info);
 int netdev_nl_dev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);

net/handshake/genl.c

@@ -8,7 +8,7 @@
 
 #include "genl.h"
 
-#include <linux/handshake.h>
+#include <uapi/linux/handshake.h>
 
 /* HANDSHAKE_CMD_ACCEPT - do */
 static const struct nla_policy handshake_accept_nl_policy[HANDSHAKE_A_ACCEPT_HANDLER_CLASS + 1] = {

net/handshake/genl.h

@@ -9,7 +9,7 @@
 #include <net/netlink.h>
 #include <net/genetlink.h>
 
-#include <linux/handshake.h>
+#include <uapi/linux/handshake.h>
 
 int handshake_nl_accept_doit(struct sk_buff *skb, struct genl_info *info);
 int handshake_nl_done_doit(struct sk_buff *skb, struct genl_info *info);

net/ipv4/fou_nl.c

@@ -8,7 +8,7 @@
 
 #include "fou_nl.h"
 
-#include <linux/fou.h>
+#include <uapi/linux/fou.h>
 
 /* Global operation policy for fou */
 const struct nla_policy fou_nl_policy[FOU_ATTR_IFINDEX + 1] = {

net/ipv4/fou_nl.h

@@ -9,7 +9,7 @@
 #include <net/netlink.h>
 #include <net/genetlink.h>
 
-#include <linux/fou.h>
+#include <uapi/linux/fou.h>
 
 /* Global operation policy for fou */
 extern const struct nla_policy fou_nl_policy[FOU_ATTR_IFINDEX + 1];

tools/net/ynl/ynl-gen-c.py

@@ -2101,7 +2101,9 @@ def main():
             if args.out_file:
                 cw.p(f'#include "{os.path.basename(args.out_file[:-2])}.h"')
             cw.nl()
-    headers = [parsed.uapi_header]
+        headers = ['uapi/' + parsed.uapi_header]
+    else:
+        headers = [parsed.uapi_header]
     for definition in parsed['definitions']:
         if 'header' in definition:
             headers.append(definition['header'])