Hello,
On Thu, 18 Apr 2024, Alexander Mikhalitsyn wrote:
> Cc: Julian Anastasov <ja@xxxxxx>
> Cc: Simon Horman <horms@xxxxxxxxxxxx>
> Cc: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
> Cc: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxx>
> Cc: Florian Westphal <fw@xxxxxxxxx>
> Suggested-by: Julian Anastasov <ja@xxxxxx>
> Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
Looks good to me, thanks!
Acked-by: Julian Anastasov <ja@xxxxxx>
> ---
> net/netfilter/ipvs/ip_vs_ctl.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
> index 143a341bbc0a..32be24f0d4e4 100644
> --- a/net/netfilter/ipvs/ip_vs_ctl.c
> +++ b/net/netfilter/ipvs/ip_vs_ctl.c
> @@ -94,6 +94,7 @@ static void update_defense_level(struct netns_ipvs *ipvs)
> {
> struct sysinfo i;
> int availmem;
> + int amemthresh;
> int nomem;
> int to_change = -1;
>
> @@ -105,7 +106,8 @@ static void update_defense_level(struct netns_ipvs *ipvs)
> /* si_swapinfo(&i); */
> /* availmem = availmem - (i.totalswap - i.freeswap); */
>
> - nomem = (availmem < ipvs->sysctl_amemthresh);
> + amemthresh = max(READ_ONCE(ipvs->sysctl_amemthresh), 0);
> + nomem = (availmem < amemthresh);
>
> local_bh_disable();
>
> @@ -145,9 +147,8 @@ static void update_defense_level(struct netns_ipvs *ipvs)
> break;
> case 1:
> if (nomem) {
> - ipvs->drop_rate = ipvs->drop_counter
> - = ipvs->sysctl_amemthresh /
> - (ipvs->sysctl_amemthresh-availmem);
> + ipvs->drop_counter = amemthresh / (amemthresh - availmem);
> + ipvs->drop_rate = ipvs->drop_counter;
> ipvs->sysctl_drop_packet = 2;
> } else {
> ipvs->drop_rate = 0;
> @@ -155,9 +156,8 @@ static void update_defense_level(struct netns_ipvs *ipvs)
> break;
> case 2:
> if (nomem) {
> - ipvs->drop_rate = ipvs->drop_counter
> - = ipvs->sysctl_amemthresh /
> - (ipvs->sysctl_amemthresh-availmem);
> + ipvs->drop_counter = amemthresh / (amemthresh - availmem);
> + ipvs->drop_rate = ipvs->drop_counter;
> } else {
> ipvs->drop_rate = 0;
> ipvs->sysctl_drop_packet = 1;
> --
> 2.34.1
Regards
--
Julian Anastasov <ja@xxxxxx>
