diff options
| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2008-08-28 15:38:41 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-09-24 18:49:01 -0400 |
| commit | 2d1ea19da0e84117d3ebbad981e4664bef03152e (patch) | |
| tree | 0b073f7b68399b35bc122487ee8dcfc5d6492901 /drivers/net/bonding | |
| parent | f382a0a8e9403c6d7f8b2cfa21e41fefb5d0c9bd (diff) | |
| download | lwn-2d1ea19da0e84117d3ebbad981e4664bef03152e.tar.gz lwn-2d1ea19da0e84117d3ebbad981e4664bef03152e.zip | |
bonding: Do not tx-balance some IPv6 packets on ALB/TLB bonds
IPv6 all-node-multicasts and DAD probes should not be tx-balanced
on ALB/TLB bonds. The all-node-multicast is an equivalent to IPv4
broadcasts. DAD probes have to be sent only on the primary so that
we don't get false-positive detections.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/bonding')
| -rw-r--r-- | drivers/net/bonding/bond_alb.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c index 3d39278a63e3..ade5f3f6693b 100644 --- a/drivers/net/bonding/bond_alb.c +++ b/drivers/net/bonding/bond_alb.c @@ -38,6 +38,7 @@ #include <linux/in.h> #include <net/ipx.h> #include <net/arp.h> +#include <net/ipv6.h> #include <asm/byteorder.h> #include "bonding.h" #include "bond_alb.h" @@ -81,6 +82,7 @@ #define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC static const u8 mac_bcast[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff}; +static const u8 mac_v6_allmcast[ETH_ALEN] = {0x33,0x33,0x00,0x00,0x00,0x01}; static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC; #pragma pack(1) @@ -1290,6 +1292,7 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) u32 hash_index = 0; const u8 *hash_start = NULL; int res = 1; + struct ipv6hdr *ip6hdr; skb_reset_mac_header(skb); eth_data = eth_hdr(skb); @@ -1319,11 +1322,32 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) } break; case ETH_P_IPV6: + /* IPv6 doesn't really use broadcast mac address, but leave + * that here just in case. + */ if (memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) { do_tx_balance = 0; break; } + /* IPv6 uses all-nodes multicast as an equivalent to + * broadcasts in IPv4. + */ + if (memcmp(eth_data->h_dest, mac_v6_allmcast, ETH_ALEN) == 0) { + do_tx_balance = 0; + break; + } + + /* Additianally, DAD probes should not be tx-balanced as that + * will lead to false positives for duplicate addresses and + * prevent address configuration from working. + */ + ip6hdr = ipv6_hdr(skb); + if (ipv6_addr_any(&ip6hdr->saddr)) { + do_tx_balance = 0; + break; + } + hash_start = (char *)&(ipv6_hdr(skb)->daddr); hash_size = sizeof(ipv6_hdr(skb)->daddr); break; |