Messages in this thread | | | From | Jay Vosburgh <> | Subject | Re: [PATCH v8] net: bonding: Add support for IPV6 ns/na to balance-alb/balance-tlb mode | Date | Mon, 24 Jan 2022 17:10:23 -0800 |
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Sun Shouxin <sunshouxin@chinatelecom.cn> wrote:
>Since ipv6 neighbor solicitation and advertisement messages >isn't handled gracefully in bond6 driver, we can see packet >drop due to inconsistency between mac address in the option >message and source MAC . > >Another examples is ipv6 neighbor solicitation and advertisement >messages from VM via tap attached to host bridge, the src mac >might be changed through balance-alb mode, but it is not synced >with Link-layer address in the option message. > >The patch implements bond6's tx handle for ipv6 neighbor >solicitation and advertisement messages. > >Suggested-by: Hu Yadi <huyd12@chinatelecom.cn> >Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com> >Signed-off-by: Sun Shouxin <sunshouxin@chinatelecom.cn> >--- > drivers/net/bonding/bond_alb.c | 37 +++++++++++++++++++++++++++++++++- > 1 file changed, 36 insertions(+), 1 deletion(-) > >diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c >index 533e476988f2..d4d8670643e9 100644 >--- a/drivers/net/bonding/bond_alb.c >+++ b/drivers/net/bonding/bond_alb.c >@@ -1269,6 +1269,34 @@ static int alb_set_mac_address(struct bonding *bond, void *addr) > return res; > } > >+/* determine if the packet is NA or NS */ >+static bool __alb_determine_nd(struct icmp6hdr *hdr) >+{ >+ if (hdr->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT || >+ hdr->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { >+ return true; >+ } >+ >+ return false; >+} >+ >+static bool alb_determine_nd(struct sk_buff *skb, struct bonding *bond) >+{ >+ struct ipv6hdr *ip6hdr; >+ struct icmp6hdr *hdr; >+ >+ ip6hdr = ipv6_hdr(skb); >+ if (ip6hdr->nexthdr == IPPROTO_ICMPV6) { >+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr))) >+ return true; >+ >+ hdr = icmp6_hdr(skb); >+ return __alb_determine_nd(hdr); >+ } >+ >+ return false; >+} >+ > /************************ exported alb functions ************************/ > > int bond_alb_initialize(struct bonding *bond, int rlb_enabled) >@@ -1348,8 +1376,10 @@ struct slave *bond_xmit_tlb_slave_get(struct bonding *bond, > /* Do not TX balance any multicast or broadcast */ > if (!is_multicast_ether_addr(eth_data->h_dest)) { > switch (skb->protocol) { >- case htons(ETH_P_IP): > case htons(ETH_P_IPV6): >+ if (alb_determine_nd(skb, bond)) >+ break;
I missed this before, but the new expectation is to have a "fallthrough;" statement when intentionally falling through to the next case. See include/linux/compiler_attributes.h.
That nit aside, this still looks fine to me.
-J
>+ case htons(ETH_P_IP): > hash_index = bond_xmit_hash(bond, skb); > if (bond->params.tlb_dynamic_lb) { > tx_slave = tlb_choose_channel(bond, >@@ -1446,6 +1476,11 @@ struct slave *bond_xmit_alb_slave_get(struct bonding *bond, > break; > } > >+ if (alb_determine_nd(skb, bond)) { >+ do_tx_balance = false; >+ break; >+ } >+ > hash_start = (char *)&ip6hdr->daddr; > hash_size = sizeof(ip6hdr->daddr); > break; > >base-commit: dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0 >-- >2.27.0 >
--- -Jay Vosburgh, jay.vosburgh@canonical.com
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