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authorPetr Machata <petrm@nvidia.com>2022-03-02 18:31:22 +0200
committerDavid S. Miller <davem@davemloft.net>2022-03-03 10:37:23 +0000
commit03ba35667091337d8e632cf4b814f1c1b914609b (patch)
tree782922ee89c832d65c5cef1a01a793288c56cf63 /net
parent0e7788fd76222dba3229eada9162efab185923fc (diff)
net: rtnetlink: Add RTM_SETSTATS
The offloaded HW stats are designed to allow per-netdevice enablement and disablement. These stats are only accessible through RTM_GETSTATS, and therefore should be toggled by a RTM_SETSTATS message. Add it, and the necessary skeleton handler. Signed-off-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/rtnetlink.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 9ce894a9454c..d09354514355 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -5564,6 +5564,10 @@ rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
};
+static const struct nla_policy
+ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
+};
+
static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
struct rtnl_stats_dump_filters *filters,
struct netlink_ext_ack *extack)
@@ -5769,6 +5773,67 @@ out:
return skb->len;
}
+static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
+{
+ struct rtnl_stats_dump_filters response_filters = {};
+ struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
+ struct net *net = sock_net(skb->sk);
+ struct net_device *dev = NULL;
+ int idxattr = 0, prividx = 0;
+ struct if_stats_msg *ifsm;
+ struct sk_buff *nskb;
+ int err;
+
+ err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
+ false, extack);
+ if (err)
+ return err;
+
+ ifsm = nlmsg_data(nlh);
+ if (ifsm->family != AF_UNSPEC) {
+ NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
+ return -EINVAL;
+ }
+
+ if (ifsm->ifindex > 0)
+ dev = __dev_get_by_index(net, ifsm->ifindex);
+ else
+ return -EINVAL;
+
+ if (!dev)
+ return -ENODEV;
+
+ if (ifsm->filter_mask) {
+ NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
+ return -EINVAL;
+ }
+
+ err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
+ ifla_stats_set_policy, extack);
+ if (err < 0)
+ return err;
+
+ nskb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
+ GFP_KERNEL);
+ if (!nskb)
+ return -ENOBUFS;
+
+ err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
+ NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
+ 0, &response_filters, &idxattr, &prividx,
+ extack);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(nskb);
+ } else {
+ err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
+ }
+
+ return err;
+}
+
/* Process one rtnetlink message. */
static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -5994,4 +6059,5 @@ void __init rtnetlink_init(void)
rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
0);
+ rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
}