netdev - [PATCH net-next v2 5/5] net: add netlink_ext_ack argument to rtnl_link_ops.slave

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Date:   Sun, 25 Jun 2017 23:56:03 +0200
From:   Matthias Schiffer <mschiffer@...verse-factory.net>
To:     dledford@...hat.com, sean.hefty@...el.com,
        hal.rosenstock@...il.com, j.vosburgh@...il.com, vfalico@...il.com,
        andy@...yhouse.net, wg@...ndegger.com, mkl@...gutronix.de,
        pablo@...filter.org, laforge@...monks.org, paulus@...ba.org,
        jiri@...nulli.us, dsa@...ulusnetworks.com, shm@...ulusnetworks.com,
        davem@...emloft.net, stephen@...workplumber.org,
        arvid.brodin@...en.se, alex.aring@...il.com,
        stefan@....samsung.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
        yoshfuji@...ux-ipv6.org, kaber@...sh.net,
        steffen.klassert@...unet.com, herbert@...dor.apana.org.au,
        johannes@...solutions.net
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-can@...r.kernel.org,
        linux-ppp@...r.kernel.org, linux-wpan@...r.kernel.org
Subject: [PATCH net-next v2 5/5] net: add netlink_ext_ack argument to rtnl_link_ops.slave_validate

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer <mschiffer@...verse-factory.net>
---
 include/net/rtnetlink.h | 3 ++-
 net/core/rtnetlink.c    | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index baf99e173dca..abe6b733d473 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -91,7 +91,8 @@ struct rtnl_link_ops {
 	int			slave_maxtype;
 	const struct nla_policy	*slave_policy;
 	int			(*slave_validate)(struct nlattr *tb[],
-						  struct nlattr *data[]);
+						  struct nlattr *data[],
+						  struct netlink_ext_ack *extack);
 	int			(*slave_changelink)(struct net_device *dev,
 						    struct net_device *slave_dev,
 						    struct nlattr *tb[],
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 658a48959fc4..ed51de525a88 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2601,7 +2601,8 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 				slave_data = slave_attr;
 			}
 			if (m_ops->slave_validate) {
-				err = m_ops->slave_validate(tb, slave_data);
+				err = m_ops->slave_validate(tb, slave_data,
+							    extack);
 				if (err < 0)
 					return err;
 			}
-- 
2.13.1