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| author | Ido Schimmel <idosch@OSS.NVIDIA.COM> | 2021-05-17 20:15:22 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-05-18 22:27:32 +0200 |
| commit | ed13923f980ef84dde0b9010b9e09052dc31a909 (patch) | |
| tree | c93208287485abcfd73fdb30abb374b70cb5f239 /include/net/netns/ipv6.h | |
| parent | ipv6: Calculate multipath hash inside switch statement (diff) | |
| download | linux-ed13923f980ef84dde0b9010b9e09052dc31a909.tar.xz linux-ed13923f980ef84dde0b9010b9e09052dc31a909.zip | |
ipv6: Add a sysctl to control multipath hash fields
A subsequent patch will add a new multipath hash policy where the packet
fields used for multipath hash calculation are determined by user space.
This patch adds a sysctl that allows user space to set these fields.
The packet fields are represented using a bitmask and are common between
IPv4 and IPv6 to allow user space to use the same numbering across both
protocols. For example, to hash based on standard 5-tuple:
# sysctl -w net.ipv6.fib_multipath_hash_fields=0x0037
net.ipv6.fib_multipath_hash_fields = 0x0037
To avoid introducing holes in 'struct netns_sysctl_ipv6', move the
'bindv6only' field after the multipath hash fields.
The kernel rejects unknown fields, for example:
# sysctl -w net.ipv6.fib_multipath_hash_fields=0x1000
sysctl: setting key "net.ipv6.fib_multipath_hash_fields": Invalid argument
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netns/ipv6.h')
| -rw-r--r-- | include/net/netns/ipv6.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h index 6153c8067009..bde0b7adb4a3 100644 --- a/include/net/netns/ipv6.h +++ b/include/net/netns/ipv6.h @@ -28,8 +28,9 @@ struct netns_sysctl_ipv6 { int ip6_rt_gc_elasticity; int ip6_rt_mtu_expires; int ip6_rt_min_advmss; - u8 bindv6only; + u32 multipath_hash_fields; u8 multipath_hash_policy; + u8 bindv6only; u8 flowlabel_consistency; u8 auto_flowlabels; int icmpv6_time; |