From: Wei Hu (Xavier) Date: Fri, 17 Jan 2020 11:49:14 +0000 (+0800) Subject: ethdev: fix VLAN offloads set if no driver callback X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2e02a2afff77d8cf7acb9a3bf5272c582b688307;p=dpdk.git ethdev: fix VLAN offloads set if no driver callback Currently, there is a potential problem that changing the content of dev->data->dev_conf.rxmode.offloads even when there is no vlan_offload_set driver callback. It is a good idea that prevent the side effect and make the API return success if no change requested. This patch fixes the problem, the detail information as below: - keep possibility to do dummy set even if there is no driver callback - do not touch Rx mode offloads in device data before checking the driver callback availability - ensure that Rx mode offloads are rolled back correctly if driver callback returns error Fixes: 81f9db8ecc2c ("ethdev: add vlan offload support") Cc: stable@dpdk.org Signed-off-by: Wei Hu (Xavier) Signed-off-by: Chunsong Feng Signed-off-by: Min Wang (Jushui) Signed-off-by: Min Hu (Connor) Reviewed-by: Andrew Rybchenko --- diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c index 42ce177fe1..9d62dc4360 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -3254,53 +3254,53 @@ rte_eth_dev_set_vlan_offload(uint16_t port_id, int offload_mask) int mask = 0; int cur, org = 0; uint64_t orig_offloads; - uint64_t *dev_offloads; + uint64_t dev_offloads; RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV); dev = &rte_eth_devices[port_id]; /* save original values in case of failure */ orig_offloads = dev->data->dev_conf.rxmode.offloads; - dev_offloads = &dev->data->dev_conf.rxmode.offloads; + dev_offloads = orig_offloads; /*check which option changed by application*/ cur = !!(offload_mask & ETH_VLAN_STRIP_OFFLOAD); - org = !!(*dev_offloads & DEV_RX_OFFLOAD_VLAN_STRIP); + org = !!(dev_offloads & DEV_RX_OFFLOAD_VLAN_STRIP); if (cur != org) { if (cur) - *dev_offloads |= DEV_RX_OFFLOAD_VLAN_STRIP; + dev_offloads |= DEV_RX_OFFLOAD_VLAN_STRIP; else - *dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_STRIP; + dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_STRIP; mask |= ETH_VLAN_STRIP_MASK; } cur = !!(offload_mask & ETH_VLAN_FILTER_OFFLOAD); - org = !!(*dev_offloads & DEV_RX_OFFLOAD_VLAN_FILTER); + org = !!(dev_offloads & DEV_RX_OFFLOAD_VLAN_FILTER); if (cur != org) { if (cur) - *dev_offloads |= DEV_RX_OFFLOAD_VLAN_FILTER; + dev_offloads |= DEV_RX_OFFLOAD_VLAN_FILTER; else - *dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_FILTER; + dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_FILTER; mask |= ETH_VLAN_FILTER_MASK; } cur = !!(offload_mask & ETH_VLAN_EXTEND_OFFLOAD); - org = !!(*dev_offloads & DEV_RX_OFFLOAD_VLAN_EXTEND); + org = !!(dev_offloads & DEV_RX_OFFLOAD_VLAN_EXTEND); if (cur != org) { if (cur) - *dev_offloads |= DEV_RX_OFFLOAD_VLAN_EXTEND; + dev_offloads |= DEV_RX_OFFLOAD_VLAN_EXTEND; else - *dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_EXTEND; + dev_offloads &= ~DEV_RX_OFFLOAD_VLAN_EXTEND; mask |= ETH_VLAN_EXTEND_MASK; } cur = !!(offload_mask & ETH_QINQ_STRIP_OFFLOAD); - org = !!(*dev_offloads & DEV_RX_OFFLOAD_QINQ_STRIP); + org = !!(dev_offloads & DEV_RX_OFFLOAD_QINQ_STRIP); if (cur != org) { if (cur) - *dev_offloads |= DEV_RX_OFFLOAD_QINQ_STRIP; + dev_offloads |= DEV_RX_OFFLOAD_QINQ_STRIP; else - *dev_offloads &= ~DEV_RX_OFFLOAD_QINQ_STRIP; + dev_offloads &= ~DEV_RX_OFFLOAD_QINQ_STRIP; mask |= ETH_QINQ_STRIP_MASK; } @@ -3309,10 +3309,11 @@ rte_eth_dev_set_vlan_offload(uint16_t port_id, int offload_mask) return ret; RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->vlan_offload_set, -ENOTSUP); + dev->data->dev_conf.rxmode.offloads = dev_offloads; ret = (*dev->dev_ops->vlan_offload_set)(dev, mask); if (ret) { /* hit an error restore original values */ - *dev_offloads = orig_offloads; + dev->data->dev_conf.rxmode.offloads = orig_offloads; } return eth_err(port_id, ret);