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ethdev: fix VLAN offloads set if no driver callback

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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: 81f9db8ecc ("ethdev: add vlan offload support")
Cc: stable@dpdk.org

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Chunsong Feng <fengchunsong@huawei.com>
Signed-off-by: Min Wang (Jushui) <wangmin3@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Wei Hu (Xavier) 2020-01-17 19:49:14 +08:00 committed by Ferruh Yigit
parent 47e7ad1b91
commit 2e02a2afff
1 changed files with 16 additions and 15 deletions
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31
lib/librte_ethdev/rte_ethdev.c
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@ -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);