diff options
| author |   Ido Schimmel <idosch@mellanox.com> | 2019-04-21 07:18:34 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-04-21 10:31:45 -0700 |
| commit | fa73989f26973fa8043252ae278533eda3b8a658 (patch) | |
| tree | 4ed425596352b9030e8c46f245724c5b0f3a4331 /drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | |
| parent | nfp: add SR-IOV trusted VF support (diff) | |
| download | linux-dev-fa73989f26973fa8043252ae278533eda3b8a658.tar.xz linux-dev-fa73989f26973fa8043252ae278533eda3b8a658.zip | |
mlxsw: spectrum: Use a stable ECMP/LAG seed
In order to get a consistent behavior of traffic flows across reboots /
module unload, we need to use the same ECMP/LAG seed.
Calculate the seed by hashing the base MAC of the device. This results
in a seed that is both unique (to avoid polarization) and consistent.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c index 64498c9f55ab..6c73400b1508 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c @@ -13,9 +13,9 @@ #include <linux/socket.h> #include <linux/route.h> #include <linux/gcd.h> -#include <linux/random.h> #include <linux/if_macvlan.h> #include <linux/refcount.h> +#include <linux/jhash.h> #include <net/netevent.h> #include <net/neighbour.h> #include <net/arp.h> @@ -7831,7 +7831,7 @@ static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) char recr2_pl[MLXSW_REG_RECR2_LEN]; u32 seed; - get_random_bytes(&seed, sizeof(seed)); + seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); mlxsw_reg_recr2_pack(recr2_pl, seed); mlxsw_sp_mp4_hash_init(recr2_pl); mlxsw_sp_mp6_hash_init(recr2_pl); |