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Commit c70ce028 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net/rtnetlink: add IFLA_GSO_MAX_SEGS and IFLA_GSO_MAX_SIZE attributes 



It can be useful to report dev->gso_max_segs and dev->gso_max_size
so that "ip -d link" can display them to help debugging.

For the moment, these attributes are read-only.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Petri Gynther <pgynther@google.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7d34fa75

include/uapi/linux/if_link.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -153,6 +153,8 @@ enum { 
	IFLA_LINK_NETNSID,

	IFLA_LINK_NETNSID,

	IFLA_PHYS_PORT_NAME,

	IFLA_PHYS_PORT_NAME,

	IFLA_PROTO_DOWN,

	IFLA_PROTO_DOWN,

	IFLA_GSO_MAX_SEGS,

	IFLA_GSO_MAX_SIZE,

	__IFLA_MAX

	__IFLA_MAX

};

};

net/core/rtnetlink.c

+4 −0
Original line number Original line Diff line number Diff line
@@ -895,6 +895,8 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev, 
	       + nla_total_size(4) /* IFLA_PROMISCUITY */

	       + nla_total_size(4) /* IFLA_PROMISCUITY */

	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */

	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */

	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */

	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */

	       + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */

	       + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */

	       + nla_total_size(1) /* IFLA_OPERSTATE */

	       + nla_total_size(1) /* IFLA_OPERSTATE */

	       + nla_total_size(1) /* IFLA_LINKMODE */

	       + nla_total_size(1) /* IFLA_LINKMODE */

	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */

	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
@@ -1223,6 +1225,8 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||

	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||

	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||

	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||

	    nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||

	    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) ||

#ifdef CONFIG_RPS

#ifdef CONFIG_RPS

	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||

	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||

#endif

#endif