diff options
Diffstat (limited to 'net/ethtool/common.c')
| -rw-r--r-- | net/ethtool/common.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/net/ethtool/common.c b/net/ethtool/common.c index dd345efa114b..0d62363dbd9d 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -684,6 +684,54 @@ int ethtool_check_max_channel(struct net_device *dev, return 0; } +int ethtool_check_rss_ctx_busy(struct net_device *dev, u32 rss_context) +{ + const struct ethtool_ops *ops = dev->ethtool_ops; + struct ethtool_rxnfc *info; + int rc, i, rule_cnt; + + if (!ops->get_rxnfc) + return 0; + + rule_cnt = ethtool_get_rxnfc_rule_count(dev); + if (!rule_cnt) + return 0; + + if (rule_cnt < 0) + return -EINVAL; + + info = kvzalloc(struct_size(info, rule_locs, rule_cnt), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->cmd = ETHTOOL_GRXCLSRLALL; + info->rule_cnt = rule_cnt; + rc = ops->get_rxnfc(dev, info, info->rule_locs); + if (rc) + goto out_free; + + for (i = 0; i < rule_cnt; i++) { + struct ethtool_rxnfc rule_info = { + .cmd = ETHTOOL_GRXCLSRULE, + .fs.location = info->rule_locs[i], + }; + + rc = ops->get_rxnfc(dev, &rule_info, NULL); + if (rc) + goto out_free; + + if (rule_info.fs.flow_type & FLOW_RSS && + rule_info.rss_context == rss_context) { + rc = -EBUSY; + goto out_free; + } + } + +out_free: + kvfree(info); + return rc; +} + int ethtool_check_ops(const struct ethtool_ops *ops) { if (WARN_ON(ops->set_coalesce && !ops->supported_coalesce_params)) |