From 9e46fb656fdb40baec33a8942743d81a40f30fd3 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Fri, 16 Apr 2021 18:55:34 +0300 Subject: [PATCH] nexthop: Restart nexthop dump based on last dumped nexthop identifier Currently, a multi-part nexthop dump is restarted based on the number of nexthops that have been dumped so far. This can result in a lot of nexthops not being dumped when nexthops are simultaneously deleted: # ip nexthop | wc -l 65536 # ip nexthop flush Dump was interrupted and may be inconsistent. Flushed 36040 nexthops # ip nexthop | wc -l 29496 Instead, restart the dump based on the nexthop identifier (fixed number) of the last successfully dumped nexthop: # ip nexthop | wc -l 65536 # ip nexthop flush Dump was interrupted and may be inconsistent. Flushed 65536 nexthops # ip nexthop | wc -l 0 Reported-by: Maksym Yaremchuk Tested-by: Maksym Yaremchuk Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv4/nexthop.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 5a2fc8798d20..4075230b14c6 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -3140,26 +3140,24 @@ static int rtm_dump_walk_nexthops(struct sk_buff *skb, void *data) { struct rb_node *node; - int idx = 0, s_idx; + int s_idx; int err; s_idx = ctx->idx; for (node = rb_first(root); node; node = rb_next(node)) { struct nexthop *nh; - if (idx < s_idx) - goto cont; - nh = rb_entry(node, struct nexthop, rb_node); - ctx->idx = idx; + if (nh->id < s_idx) + continue; + + ctx->idx = nh->id; err = nh_cb(skb, cb, nh, data); if (err) return err; -cont: - idx++; } - ctx->idx = idx; + ctx->idx++; return 0; }