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| author |   Ido Schimmel <idosch@OSS.NVIDIA.COM> | 2021-05-17 21:15:18 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-05-18 13:27:32 -0700 |
| commit | ce5c9c20d364f156c885efed8c71fca2945db00f (patch) | |
| tree | bb4858afb789ab04d7330dc3bff07f999814bbff /include/net/netns | |
| parent | ipv4: Calculate multipath hash inside switch statement (diff) | |
| download | linux-dev-ce5c9c20d364f156c885efed8c71fca2945db00f.tar.xz linux-dev-ce5c9c20d364f156c885efed8c71fca2945db00f.zip | |
ipv4: 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.ipv4.fib_multipath_hash_fields=0x0037
net.ipv4.fib_multipath_hash_fields = 0x0037
The kernel rejects unknown fields, for example:
# sysctl -w net.ipv4.fib_multipath_hash_fields=0x1000
sysctl: setting key "net.ipv4.fib_multipath_hash_fields": Invalid argument
More fields can be added in the future, if needed.
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')
| -rw-r--r-- | include/net/netns/ipv4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index f6af8d96d3c6..746c80cd4257 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -210,6 +210,7 @@ struct netns_ipv4 { #endif #endif #ifdef CONFIG_IP_ROUTE_MULTIPATH + u32 sysctl_fib_multipath_hash_fields; u8 sysctl_fib_multipath_use_neigh; u8 sysctl_fib_multipath_hash_policy; #endif |