netdev - [PATCH net-next 2/2] net: vxlan: vxlan_core.c: Add extack support to vxlan_fdb

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Date:   Tue, 19 Apr 2022 16:37:18 +0200
From:   Alaa Mohamed <eng.alaamohamedsoliman.am@...il.com>
To:     netdev@...r.kernel.org
Cc:     outreachy@...ts.linux.dev, roopa@...dia.com,
        roopa.prabhu@...il.com, jdenham@...hat.com, sbrivio@...hat.com,
        eng.alaamohamedsoliman.am@...il.com
Subject: [PATCH net-next 2/2] net: vxlan: vxlan_core.c: Add extack support to vxlan_fdb_delet

Add extack to vxlan_fdb_delet and vxlan_fdb_parse

Signed-off-by: Alaa Mohamed <eng.alaamohamedsoliman.am@...il.com>
---
 drivers/net/vxlan/vxlan_core.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index cf2f60037340..4ecbb5878fe2 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -1129,18 +1129,20 @@ static void vxlan_fdb_dst_destroy(struct vxlan_dev *vxlan, struct vxlan_fdb *f,

 static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
 			   union vxlan_addr *ip, __be16 *port, __be32 *src_vni,
-			   __be32 *vni, u32 *ifindex, u32 *nhid)
+			   __be32 *vni, u32 *ifindex, u32 *nhid, struct netlink_ext_ack *extack)
 {
 	struct net *net = dev_net(vxlan->dev);
 	int err;

 	if (tb[NDA_NH_ID] && (tb[NDA_DST] || tb[NDA_VNI] || tb[NDA_IFINDEX] ||
 	    tb[NDA_PORT]))
+		NL_SET_ERR_MSG(extack, "Missing required arguments");
 		return -EINVAL;

 	if (tb[NDA_DST]) {
 		err = vxlan_nla_get_addr(ip, tb[NDA_DST]);
 		if (err)
+			NL_SET_ERR_MSG(extack, "Unsupported address family");
 			return err;
 	} else {
 		union vxlan_addr *remote = &vxlan->default_dst.remote_ip;
@@ -1158,6 +1160,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,

 	if (tb[NDA_PORT]) {
 		if (nla_len(tb[NDA_PORT]) != sizeof(__be16))
+			NL_SET_ERR_MSG(extack, "Invalid vxlan port");
 			return -EINVAL;
 		*port = nla_get_be16(tb[NDA_PORT]);
 	} else {
@@ -1166,6 +1169,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,

 	if (tb[NDA_VNI]) {
 		if (nla_len(tb[NDA_VNI]) != sizeof(u32))
+			NL_SET_ERR_MSG(extack, "Invalid vni");
 			return -EINVAL;
 		*vni = cpu_to_be32(nla_get_u32(tb[NDA_VNI]));
 	} else {
@@ -1174,6 +1178,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,

 	if (tb[NDA_SRC_VNI]) {
 		if (nla_len(tb[NDA_SRC_VNI]) != sizeof(u32))
+			NL_SET_ERR_MSG(extack, "Invalid src vni");
 			return -EINVAL;
 		*src_vni = cpu_to_be32(nla_get_u32(tb[NDA_SRC_VNI]));
 	} else {
@@ -1184,10 +1189,12 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
 		struct net_device *tdev;

 		if (nla_len(tb[NDA_IFINDEX]) != sizeof(u32))
+			NL_SET_ERR_MSG(extack, "Invalid ifindex");
 			return -EINVAL;
 		*ifindex = nla_get_u32(tb[NDA_IFINDEX]);
 		tdev = __dev_get_by_index(net, *ifindex);
 		if (!tdev)
+			NL_SET_ERR_MSG(extack,"Device not found");
 			return -EADDRNOTAVAIL;
 	} else {
 		*ifindex = 0;
@@ -1226,7 +1233,7 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 		return -EINVAL;

 	err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex,
-			      &nhid);
+			      &nhid, extack);
 	if (err)
 		return err;

@@ -1291,7 +1298,7 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 	int err;

 	err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &src_vni, &vni, &ifindex,
-			      &nhid);
+			      &nhid, extack);
 	if (err)
 		return err;

--
2.35.2