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>

3 files changed, 13 insertions, 12 deletions

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index a606025814a1..2f64262ab5d2 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1115,9 +1115,10 @@ nlmsg_failure:
 
 static int __init tc_action_init(void)
 {
-        rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL);
-        rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL);
-        rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action);
+        rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
+                      NULL);
 
         return 0;
 }
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index bb2c523f8158..9563887f219f 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -610,10 +610,10 @@ EXPORT_SYMBOL(tcf_exts_dump_stats);
 
 static int __init tc_filter_init(void)
 {
-        rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL);
-        rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL);
+        rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL, NULL);
         rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter,
-                                                 tc_dump_tfilter);
+                      tc_dump_tfilter, NULL);
 
         return 0;
 }
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 6b8627661c98..8182aefafb02 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1792,12 +1792,12 @@ static int __init pktsched_init(void)
         register_qdisc(&pfifo_head_drop_qdisc_ops);
         register_qdisc(&mq_qdisc_ops);
 
-        rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL);
-        rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL);
-        rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc);
-        rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL);
-        rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL);
-        rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass);
+        rtnl_register(PF_UNSPEC, RTM_NEWQDISC, tc_modify_qdisc, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_DELQDISC, tc_get_qdisc, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_GETQDISC, tc_get_qdisc, tc_dump_qdisc, NULL);
+        rtnl_register(PF_UNSPEC, RTM_NEWTCLASS, tc_ctl_tclass, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_DELTCLASS, tc_ctl_tclass, NULL, NULL);
+        rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass, NULL);
 
         return 0;
 }