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Date: Wed, 28 Nov 2018 14:27:58 -0800
From: Roopa Prabhu <roopa@...ulusnetworks.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [PATCH net-next v2 2/3] vxlan: extack support for some changelink cases
From: Roopa Prabhu <roopa@...ulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
drivers/net/vxlan.c | 76 +++++++++++++++++++++++++++++++++++++++++------------
1 file changed, 59 insertions(+), 17 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 73caa65..4cb6b50 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -3376,7 +3376,7 @@ static int __vxlan_dev_create(struct net *net, struct net_device *dev,
static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
struct net_device *dev, struct vxlan_config *conf,
- bool changelink)
+ bool changelink, struct netlink_ext_ack *extack)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
@@ -3389,40 +3389,60 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
if (data[IFLA_VXLAN_ID]) {
__be32 vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
- if (changelink && (vni != conf->vni))
+ if (changelink && (vni != conf->vni)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_ID],
+ "Cannot change vni");
return -EOPNOTSUPP;
+ }
conf->vni = cpu_to_be32(nla_get_u32(data[IFLA_VXLAN_ID]));
}
if (data[IFLA_VXLAN_GROUP]) {
- if (changelink && (conf->remote_ip.sa.sa_family != AF_INET))
+ if (changelink && (conf->remote_ip.sa.sa_family != AF_INET)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP],
+ "New group addr family does not match old group");
return -EOPNOTSUPP;
-
+ }
conf->remote_ip.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_GROUP]);
conf->remote_ip.sa.sa_family = AF_INET;
} else if (data[IFLA_VXLAN_GROUP6]) {
- if (!IS_ENABLED(CONFIG_IPV6))
+ if (!IS_ENABLED(CONFIG_IPV6)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6],
+ "IPv6 support not enabled in the kernel");
return -EPFNOSUPPORT;
+ }
- if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6))
+ if (changelink && (conf->remote_ip.sa.sa_family != AF_INET6)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_GROUP6],
+ "New group addr family does not match old group");
return -EOPNOTSUPP;
+ }
conf->remote_ip.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_GROUP6]);
conf->remote_ip.sa.sa_family = AF_INET6;
}
if (data[IFLA_VXLAN_LOCAL]) {
- if (changelink && (conf->saddr.sa.sa_family != AF_INET))
+ if (changelink && (conf->saddr.sa.sa_family != AF_INET)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL],
+ "New local addr family does not match old");
return -EOPNOTSUPP;
+ }
conf->saddr.sin.sin_addr.s_addr = nla_get_in_addr(data[IFLA_VXLAN_LOCAL]);
conf->saddr.sa.sa_family = AF_INET;
} else if (data[IFLA_VXLAN_LOCAL6]) {
- if (!IS_ENABLED(CONFIG_IPV6))
+ if (!IS_ENABLED(CONFIG_IPV6)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6],
+ "IPv6 support not enabled in the kernel");
return -EPFNOSUPPORT;
+ }
- if (changelink && (conf->saddr.sa.sa_family != AF_INET6))
+ if (changelink && (conf->saddr.sa.sa_family != AF_INET6)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LOCAL6],
+ "New local6 addr family does not match old");
return -EOPNOTSUPP;
+ }
/* TODO: respect scope id */
conf->saddr.sin6.sin6_addr = nla_get_in6_addr(data[IFLA_VXLAN_LOCAL6]);
@@ -3479,14 +3499,21 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
}
if (data[IFLA_VXLAN_LIMIT]) {
- if (changelink)
+ if (changelink) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_VXLAN_LIMIT],
+ "Cannot change limit");
return -EOPNOTSUPP;
+ }
conf->addrmax = nla_get_u32(data[IFLA_VXLAN_LIMIT]);
}
if (data[IFLA_VXLAN_COLLECT_METADATA]) {
- if (changelink)
+ if (changelink) {
+ NL_SET_ERR_MSG_ATTR(extack,
+ tb[IFLA_VXLAN_COLLECT_METADATA],
+ "Cannot change metadata flag");
return -EOPNOTSUPP;
+ }
if (nla_get_u8(data[IFLA_VXLAN_COLLECT_METADATA]))
conf->flags |= VXLAN_F_COLLECT_METADATA;
}
@@ -3497,20 +3524,31 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
= nla_data(data[IFLA_VXLAN_PORT_RANGE]);
conf->port_min = ntohs(p->low);
conf->port_max = ntohs(p->high);
- } else {
+ else {
+ NL_SET_ERR_MSG_ATTR(extack,
+ tb[IFLA_VXLAN_PORT_RANGE],
+ "Cannot change port range");
return -EOPNOTSUPP;
}
}
if (data[IFLA_VXLAN_PORT]) {
- if (changelink)
+ if (changelink) {
+ NL_SET_ERR_MSG_ATTR(extack,
+ tb[IFLA_VXLAN_PORT],
+ "Cannot change port");
return -EOPNOTSUPP;
+ }
conf->dst_port = nla_get_be16(data[IFLA_VXLAN_PORT]);
}
if (data[IFLA_VXLAN_UDP_CSUM]) {
- if (changelink)
+ if (changelink) {
+ NL_SET_ERR_MSG_ATTR(extack,
+ tb[IFLA_VXLAN_UDP_CSUM],
+ "Cannot change udp csum");
return -EOPNOTSUPP;
+ }
if (!nla_get_u8(data[IFLA_VXLAN_UDP_CSUM]))
conf->flags |= VXLAN_F_UDP_ZERO_CSUM_TX;
}
@@ -3545,8 +3583,12 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
conf->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
if (tb[IFLA_MTU]) {
- if (changelink)
+ if (changelink) {
+ NL_SET_ERR_MSG_ATTR(extack,
+ tb[IFLA_MTU],
+ "Cannot change mtu");
return -EOPNOTSUPP;
+ }
conf->mtu = nla_get_u32(tb[IFLA_MTU]);
}
@@ -3563,7 +3605,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
struct vxlan_config conf;
int err;
- err = vxlan_nl2conf(tb, data, dev, &conf, false);
+ err = vxlan_nl2conf(tb, data, dev, &conf, false, extack);
if (err)
return err;
@@ -3583,7 +3625,7 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
int err;
err = vxlan_nl2conf(tb, data,
- dev, &conf, true);
+ dev, &conf, true, extack);
if (err)
return err;
--
2.1.4
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