diff options
Diffstat (limited to 'net/ethtool/common.c')
| -rw-r--r-- | net/ethtool/common.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/ethtool/common.c b/net/ethtool/common.c index 82afe0f2a7cd..2a1d40efb1fc 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -806,6 +806,40 @@ out_free: return rc; } +struct ethtool_rxfh_context * +ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops, + u32 indir_size, u32 key_size) +{ + size_t indir_bytes, flex_len, key_off, size; + struct ethtool_rxfh_context *ctx; + u32 priv_bytes, indir_max; + u16 key_max; + + key_max = max(key_size, ops->rxfh_key_space); + indir_max = max(indir_size, ops->rxfh_indir_space); + + priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32)); + indir_bytes = array_size(indir_max, sizeof(u32)); + + key_off = size_add(priv_bytes, indir_bytes); + flex_len = size_add(key_off, key_max); + size = struct_size_t(struct ethtool_rxfh_context, data, flex_len); + + ctx = kzalloc(size, GFP_KERNEL_ACCOUNT); + if (!ctx) + return NULL; + + ctx->indir_size = indir_size; + ctx->key_size = key_size; + ctx->key_off = key_off; + ctx->priv_size = ops->rxfh_priv_size; + + ctx->hfunc = ETH_RSS_HASH_NO_CHANGE; + ctx->input_xfrm = RXH_XFRM_NO_CHANGE; + + return ctx; +} + /* Check if fields configured for flow hash are symmetric - if src is included * so is dst and vice versa. */ |