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Message-Id: <1436481330-4599-3-git-send-email-anuradhak@cumulusnetworks.com>
Date: Thu, 9 Jul 2015 15:35:28 -0700
From: anuradhak@...ulusnetworks.com
To: davem@...emloft.net, sfeldma@...il.com
Cc: netdev@...r.kernel.org, roopa@...ulusnetworks.com,
gospo@...ulusnetworks.com, wkok@...ulusnetworks.com,
anuradhak@...ulusnetworks.com
Subject: [PATCH net-next v5 2/4] netlink: changes for setting and clearing protodown via netlink.
From: Anuradha Karuppiah <anuradhak@...ulusnetworks.com>
A nested attribute has been added allowing apps to update bits
(IF_PROTOF_DOWN) in the proto_flags field.
Signed-off-by: Anuradha Karuppiah <anuradhak@...ulusnetworks.com>
Signed-off-by: Andy Gospodarek <gospo@...ulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
Signed-off-by: Wilson Kok <wkok@...ulusnetworks.com>
---
include/uapi/linux/if_link.h | 10 ++++++++
net/core/rtnetlink.c | 57 +++++++++++++++++++++++++++++++++++++++++-
2 files changed, 66 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 2c7e8e3..cadfc1a 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -148,6 +148,7 @@ enum {
IFLA_PHYS_SWITCH_ID,
IFLA_LINK_NETNSID,
IFLA_PHYS_PORT_NAME,
+ IFLA_PROTO_FLAGS_INFO,
__IFLA_MAX
};
@@ -651,4 +652,13 @@ enum {
#define IFLA_HSR_MAX (__IFLA_HSR_MAX - 1)
+/* proto_flags section */
+enum {
+ IFLA_PROTO_FLAGS_UNSPEC,
+ IFLA_PROTO_FLAGS_VAL,
+ IFLA_PROTO_FLAGS_CHANGE,
+ __IFLA_PROTO_FLAGS_MAX,
+};
+
+#define IFLA_PROTO_FLAGS_MAX (__IFLA_PROTO_FLAGS_MAX - 1)
#endif /* _UAPI_LINUX_IF_LINK_H */
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 01ced4a..3a49d45 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -864,6 +864,16 @@ static size_t rtnl_port_size(const struct net_device *dev,
return port_self_size;
}
+static size_t rtnl_proto_flags_info_size(const struct net_device *dev)
+{
+ size_t proto_flags_size =
+ nla_total_size(sizeof(struct nlattr))
+ + nla_total_size(4) /* IFLA_PROTO_FLAGS_VAL */
+ + nla_total_size(4); /* IFLA_PROTO_FLAGS_CHANGE */
+
+ return proto_flags_size;
+}
+
static noinline size_t if_nlmsg_size(const struct net_device *dev,
u32 ext_filter_mask)
{
@@ -896,7 +906,9 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
+ rtnl_link_get_size(dev) /* IFLA_LINKINFO */
+ rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
+ nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
- + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */
+ + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
+ + rtnl_proto_flags_info_size(dev); /* IFLA_PROTO_FLAGS_INFO */
+
}
static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
@@ -1046,6 +1058,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
struct nlattr *attr, *af_spec;
struct rtnl_af_ops *af_ops;
struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
+ struct nlattr *proto_flags_info;
ASSERT_RTNL();
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
@@ -1282,6 +1295,14 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
nla_nest_end(skb, af_spec);
+ proto_flags_info = nla_nest_start(skb, IFLA_PROTO_FLAGS_INFO);
+ if (!proto_flags_info)
+ goto nla_put_failure;
+ if (nla_put_u32(skb, IFLA_PROTO_FLAGS_VAL, dev->proto_flags) ||
+ nla_put_u32(skb, IFLA_PROTO_FLAGS_CHANGE, ~0))
+ goto nla_put_failure;
+ nla_nest_end(skb, proto_flags_info);
+
nlmsg_end(skb, nlh);
return 0;
@@ -1319,6 +1340,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
[IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
[IFLA_LINK_NETNSID] = { .type = NLA_S32 },
+ [IFLA_PROTO_FLAGS_INFO] = {. type = NLA_NESTED },
};
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
@@ -1366,6 +1388,12 @@ static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
[IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
};
+static const struct nla_policy
+ ifla_proto_flags_policy[IFLA_PROTO_FLAGS_MAX + 1] = {
+ [IFLA_PROTO_FLAGS_VAL] = { .type = NLA_U32 },
+ [IFLA_PROTO_FLAGS_CHANGE] = { .type = NLA_U32 },
+};
+
static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
@@ -1853,6 +1881,33 @@ static int do_setlink(const struct sk_buff *skb,
}
err = 0;
+ if (tb[IFLA_PROTO_FLAGS_INFO]) {
+ struct nlattr *proto_flags[IFLA_PROTO_FLAGS_MAX + 1];
+ int rem;
+ unsigned int pflags;
+ unsigned int pchange;
+
+ err = nla_parse_nested(proto_flags, IFLA_PROTO_FLAGS_MAX,
+ tb[IFLA_PROTO_FLAGS_INFO],
+ ifla_proto_flags_policy);
+ if (err < 0)
+ goto errout;
+
+ if (!proto_flags[IFLA_PROTO_FLAGS_VAL] ||
+ !proto_flags[IFLA_PROTO_FLAGS_CHANGE]) {
+ err = -EOPNOTSUPP;
+ goto errout;
+ }
+ pflags = nla_get_u32(proto_flags[IFLA_PROTO_FLAGS_VAL]);
+ pchange = nla_get_u32(proto_flags[IFLA_PROTO_FLAGS_CHANGE]);
+ pflags = (pflags & pchange) | (dev->proto_flags & ~pchange);
+ err = dev_change_proto_flags(dev, pflags);
+ if (err < 0)
+ goto errout;
+
+ status |= DO_SETLINK_NOTIFY;
+ }
+ err = 0;
errout:
if (status & DO_SETLINK_MODIFIED) {
if (status & DO_SETLINK_NOTIFY)
--
1.7.10.4
--
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