[PATCH net-next v2 3/3] genetlink: remove linux/genetlink.h

[PATCH net-next v2 3/3] genetlink: remove linux/genetlink.h

[Jakub Kicinski]

genetlink.h is a shell of what used to be a combined uAPI
and kernel header over a decade ago. It has fewer than
10 lines of code. Merge it into net/genetlink.h.
In some ways it'd be better to keep the combined header
under linux/ but it would make looking through git history
harder.

Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
v2:
 - remove extern
 - include linux/net.h
 - improve the comment, not "all" requests are serialized

CC: Jason@zx2c4.com
CC: mareklindner@neomailbox.ch
CC: sw@simonwunderlich.de
CC: a@unstable.cc
CC: pshelar@ovn.org
CC: andriy.shevchenko@linux.intel.com
CC: wireguard@lists.zx2c4.com
CC: dev@openvswitch.org
---
 drivers/net/wireguard/main.c      |  2 +-
 include/linux/genetlink.h         | 14 --------------
 include/linux/genl_magic_struct.h |  2 +-
 include/net/genetlink.h           | 10 +++++++++-
 net/batman-adv/main.c             |  2 +-
 net/batman-adv/netlink.c          |  1 -
 net/openvswitch/datapath.c        |  1 -
 7 files changed, 12 insertions(+), 20 deletions(-)
 delete mode 100644 include/linux/genetlink.h

diff --git a/drivers/net/wireguard/main.c b/drivers/net/wireguard/main.c
index ee4da9ab8013..a00671b58701 100644
--- a/drivers/net/wireguard/main.c
+++ b/drivers/net/wireguard/main.c
@@ -14,7 +14,7 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/genetlink.h>
+#include <net/genetlink.h>
 #include <net/rtnetlink.h>
 
 static int __init wg_mod_init(void)
diff --git a/include/linux/genetlink.h b/include/linux/genetlink.h
deleted file mode 100644
index 9dbd7ba9b858..000000000000
--- a/include/linux/genetlink.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_GENERIC_NETLINK_H
-#define __LINUX_GENERIC_NETLINK_H
-
-#include <uapi/linux/genetlink.h>
-
-/* All generic netlink requests are serialized by a global lock.  */
-extern void genl_lock(void);
-extern void genl_unlock(void);
-
-#define MODULE_ALIAS_GENL_FAMILY(family)\
- MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)
-
-#endif	/* __LINUX_GENERIC_NETLINK_H */
diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h
index a419d93789ff..621b87a87d74 100644
--- a/include/linux/genl_magic_struct.h
+++ b/include/linux/genl_magic_struct.h
@@ -15,8 +15,8 @@
 #endif
 
 #include <linux/args.h>
-#include <linux/genetlink.h>
 #include <linux/types.h>
+#include <net/genetlink.h>
 
 extern int CONCATENATE(GENL_MAGIC_FAMILY, _genl_register)(void);
 extern void CONCATENATE(GENL_MAGIC_FAMILY, _genl_unregister)(void);
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 9ece6e5a3ea8..7648dd6b8754 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -2,12 +2,20 @@
 #ifndef __NET_GENERIC_NETLINK_H
 #define __NET_GENERIC_NETLINK_H
 
-#include <linux/genetlink.h>
+#include <linux/net.h>
 #include <net/netlink.h>
 #include <net/net_namespace.h>
+#include <uapi/linux/genetlink.h>
 
 #define GENLMSG_DEFAULT_SIZE (NLMSG_DEFAULT_SIZE - GENL_HDRLEN)
 
+/* Non-parallel generic netlink requests are serialized by a global lock.  */
+void genl_lock(void);
+void genl_unlock(void);
+
+#define MODULE_ALIAS_GENL_FAMILY(family) \
+ MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)
+
 /* Binding to multicast group requires %CAP_NET_ADMIN */
 #define GENL_MCAST_CAP_NET_ADMIN	BIT(0)
 /* Binding to multicast group requires %CAP_SYS_ADMIN */
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 75119f1ffccc..8e0f44c71696 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -14,7 +14,6 @@
 #include <linux/crc32c.h>
 #include <linux/device.h>
 #include <linux/errno.h>
-#include <linux/genetlink.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
@@ -38,6 +37,7 @@
 #include <linux/string.h>
 #include <linux/workqueue.h>
 #include <net/dsfield.h>
+#include <net/genetlink.h>
 #include <net/rtnetlink.h>
 #include <uapi/linux/batadv_packet.h>
 #include <uapi/linux/batman_adv.h>
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index 0954757f0b8b..9362cd9d6f3d 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -15,7 +15,6 @@
 #include <linux/cache.h>
 #include <linux/err.h>
 #include <linux/errno.h>
-#include <linux/genetlink.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 11c69415c605..99d72543abd3 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -15,7 +15,6 @@
 #include <linux/delay.h>
 #include <linux/time.h>
 #include <linux/etherdevice.h>
-#include <linux/genetlink.h>
 #include <linux/kernel.h>
 #include <linux/kthread.h>
 #include <linux/mutex.h>
-- 
2.44.0

Re: [PATCH net-next v2 3/3] genetlink: remove linux/genetlink.h

[Andy Shevchenko]

On Mon, Mar 25, 2024 at 10:37:16AM -0700, Jakub Kicinski wrote:
> genetlink.h is a shell of what used to be a combined uAPI
> and kernel header over a decade ago. It has fewer than
> 10 lines of code. Merge it into net/genetlink.h.
> In some ways it'd be better to keep the combined header
> under linux/ but it would make looking through git history
> harder.

Some last moment minor comments (no need to send a new version, JFYI,
maybe you tide this up when applying).

...

> +/* Non-parallel generic netlink requests are serialized by a global lock.  */

While at it, maybe drop extra space? (I noticed it was originally like this.

...

> +#define MODULE_ALIAS_GENL_FAMILY(family) \
> + MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)

I would still make this TAB indented.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH net-next v2 3/3] genetlink: remove linux/genetlink.h

[Jakub Kicinski]

On Mon, 25 Mar 2024 19:45:05 +0200 Andy Shevchenko wrote:
> > +/* Non-parallel generic netlink requests are serialized by a global lock.  */  
> 
> While at it, maybe drop extra space? (I noticed it was originally like this.

Fair, I'll post v3.

> > +#define MODULE_ALIAS_GENL_FAMILY(family) \
> > + MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)  
> 
> I would still make this TAB indented.

That one I'd prefer to keep. Coin toss between going over 80 chars
and having someone atypical indent.
-- 
pw-bot: cr