netdev - [RFC PATCH net-next v4 2/6] gtp: Add support for checking GTP device type

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Message-Id: <20220204165056.10572-1-marcin.szycik@linux.intel.com>
Date:   Fri,  4 Feb 2022 17:50:56 +0100
From:   Marcin Szycik <marcin.szycik@...ux.intel.com>
To:     netdev@...r.kernel.org
Cc:     michal.swiatkowski@...ux.intel.com, wojciech.drewek@...el.com,
        davem@...emloft.net, kuba@...nel.org, pablo@...filter.org,
        laforge@...monks.org, osmocom-net-gprs@...ts.osmocom.org
Subject: [RFC PATCH net-next v4 2/6] gtp: Add support for checking GTP device type

From: Wojciech Drewek <wojciech.drewek@...el.com>

Add a function that checks if a net device type is GTP.

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
 include/net/gtp.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/net/gtp.h b/include/net/gtp.h
index 0e16ebb2a82d..ae915dd33d20 100644
--- a/include/net/gtp.h
+++ b/include/net/gtp.h
@@ -27,6 +27,12 @@ struct gtp1_header {	/* According to 3GPP TS 29.060. */
 	__be32	tid;
 } __attribute__ ((packed));
 
+static inline bool netif_is_gtp(const struct net_device *dev)
+{
+	return dev->rtnl_link_ops &&
+		!strcmp(dev->rtnl_link_ops->kind, "gtp");
+}
+
 #define GTP1_F_NPDU	0x01
 #define GTP1_F_SEQ	0x02
 #define GTP1_F_EXTHDR	0x04
-- 
2.31.1