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| author |   Ido Schimmel <idosch@OSS.NVIDIA.COM> | 2021-05-17 21:15:22 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-05-18 13:27:32 -0700 |
| commit | ed13923f980ef84dde0b9010b9e09052dc31a909 (patch) | |
| tree | c93208287485abcfd73fdb30abb374b70cb5f239 /include/net/ipv6.h | |
| parent | ipv6: Calculate multipath hash inside switch statement (diff) | |
| download | linux-dev-ed13923f980ef84dde0b9010b9e09052dc31a909.tar.xz linux-dev-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 '')
| -rw-r--r-- | include/net/ipv6.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 448bf2b34759..f2d0ecc257bb 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -926,11 +926,19 @@ static inline int ip6_multipath_hash_policy(const struct net *net) { return net->ipv6.sysctl.multipath_hash_policy; } +static inline u32 ip6_multipath_hash_fields(const struct net *net) +{ + return net->ipv6.sysctl.multipath_hash_fields; +} #else static inline int ip6_multipath_hash_policy(const struct net *net) { return 0; } +static inline u32 ip6_multipath_hash_fields(const struct net *net) +{ + return 0; +} #endif /* |