[PATCH iproute2 v3 0/2] ip: ipstats: Fix statistics split across netlink messages

[Alexander Zubkov <green@qrator.net>]

The kernel can split the statistics of one interface across several
netlink messages, and "ip stats" formats each of them on its own, so the
interface is shown twice and part of its statistics is lost. Easy to hit
with "group offload subgroup l3_stats" on a box with many netdevices:

    109: vlan859: group offload subgroup l3_stats on used on

    109: vlan859: group offload subgroup l3_stats

Patch 1 merges such messages before formatting them, patch 2 is an
unrelated cleanup.

v3:
 - Merge rewritten to the shape Stephen suggested.
v2: https://lore.kernel.org/netdev/20260908181225.31712-1-green@qrator.net/
 - Comments and commit messages trimmed, the merge reworked around the
   two border attributes that can actually be halves of one nest.
v1: https://lore.kernel.org/netdev/20260830181949.1096-1-green@qrator.net/

Alexander Zubkov (2):
  ip: ipstats: Merge statistics split across several netlink messages
  ip: ipstats: Do not hide HW statistics when hw_stats_info is missing

 ip/ipstats.c | 145 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 137 insertions(+), 8 deletions(-)

-- 
2.55.0