rtnetlink: advertise allmulti counter

Like what was done with IFLA_PROMISCUITY, add IFLA_ALLMULTI to advertise the allmulti counter. The flag IFF_ALLMULTI is advertised only if it was directly set by a userland app. Signed-off-by: Nicolas Dichtel <[email protected]> Signed-off-by: David S. Miller <[email protected]>
josf · Sep 16, 2022 · 7e6e1b5 · 7e6e1b5
1 parent da97072
commit 7e6e1b5
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diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
@@ -370,6 +370,7 @@ enum {
 	IFLA_GRO_MAX_SIZE,
 	IFLA_TSO_MAX_SIZE,
 	IFLA_TSO_MAX_SEGS,
+	IFLA_ALLMULTI,		/* Allmulti count: > 0 means acts ALLMULTI */
 
 	__IFLA_MAX
 };

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
@@ -1057,6 +1057,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
 	       + nla_total_size(4) /* IFLA_MASTER */
 	       + nla_total_size(1) /* IFLA_CARRIER */
 	       + nla_total_size(4) /* IFLA_PROMISCUITY */
+	       + nla_total_size(4) /* IFLA_ALLMULTI */
 	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
 	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
 	       + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
@@ -1765,6 +1766,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb,
 	    nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
 	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||
 	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
+	    nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
 	    nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
 	    nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
 	    nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
@@ -1926,6 +1928,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_GRO_MAX_SIZE]	= { .type = NLA_U32 },
 	[IFLA_TSO_MAX_SIZE]	= { .type = NLA_REJECT },
 	[IFLA_TSO_MAX_SEGS]	= { .type = NLA_REJECT },
+	[IFLA_ALLMULTI]		= { .type = NLA_REJECT },
 };
 
 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {