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rtnetlink: allow GSO maximums to be set on device creation

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Netlink device already allows changing GSO sizes with
ip set command. The part that is missing is allowing overriding
GSO settings on device creation.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stephen Hemminger authored and David S. Miller committed 2017-12-08 14:22:59 -05:00
1 parent 5a6a0445d1
commit 46e6b992c2
1 file changed
+34
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net/core/rtnetlink.c
+34
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@@ -1637,6 +1637,8 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_PROMISCUITY] = { .type = NLA_U32 },
[IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
[IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
[IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
[IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
[IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
[IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
[IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
@@ -2287,6 +2289,34 @@ static int do_setlink(const struct sk_buff *skb,
}
}
if (tb[IFLA_GSO_MAX_SIZE]) {
u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
if (max_size > GSO_MAX_SIZE) {
err = -EINVAL;
goto errout;
}
if (dev->gso_max_size ^ max_size) {
netif_set_gso_max_size(dev, max_size);
status |= DO_SETLINK_MODIFIED;
}
}
if (tb[IFLA_GSO_MAX_SEGS]) {
u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
if (max_segs > GSO_MAX_SEGS) {
err = -EINVAL;
goto errout;
}
if (dev->gso_max_segs ^ max_segs) {
dev->gso_max_segs = max_segs;
status |= DO_SETLINK_MODIFIED;
}
}
if (tb[IFLA_OPERSTATE])
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
@@ -2651,6 +2681,10 @@ struct net_device *rtnl_create_link(struct net *net,
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
if (tb[IFLA_GROUP])
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
if (tb[IFLA_GSO_MAX_SIZE])
netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
if (tb[IFLA_GSO_MAX_SEGS])
dev->gso_max_size = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
return dev;
}