rtnetlink: Compute and store minimum ifinfo dump size

The message size allocated for rtnl ifinfo dumps was limited to
a single page.  This is not enough for additional interface info
available with devices that support SR-IOV and caused a bug in
which VF info would not be displayed if more than approximately
40 VFs were created per interface.

Implement a new function pointer for the rtnl_register service that will
calculate the amount of data required for the ifinfo dump and allocate
enough data to satisfy the request.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

2 files changed, 3 insertions, 3 deletions

diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index 8041befc6555..333b0bedf298 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -1120,7 +1120,7 @@ ip_set_dump(struct sock *ctnl, struct sk_buff *skb,
 
         return netlink_dump_start(ctnl, skb, nlh,
                                   ip_set_dump_start,
-                                  ip_set_dump_done);
+                                  ip_set_dump_done, 0);
 }
 
 /* Add, del and test */
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 482e90c61850..7dec88a1755b 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -970,7 +970,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
 
         if (nlh->nlmsg_flags & NLM_F_DUMP)
                 return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table,
-                                          ctnetlink_done);
+                                          ctnetlink_done, 0);
 
         err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone);
         if (err < 0)
@@ -1840,7 +1840,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
         if (nlh->nlmsg_flags & NLM_F_DUMP) {
                 return netlink_dump_start(ctnl, skb, nlh,
                                           ctnetlink_exp_dump_table,
-                                          ctnetlink_exp_done);
+                                          ctnetlink_exp_done, 0);
         }
 
         err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone);