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* [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
@ 2020-04-14 23:06 Souvik Dey
  0 siblings, 0 replies; 8+ messages in thread
From: Souvik Dey @ 2020-04-14 23:06 UTC (permalink / raw)
  To: beilei.xing, qi.z.zhang; +Cc: dev, Souvik Dey

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to check the state of the
DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and disable the vlan strip
after sending add_vlan if app configured the VLAN_STRIP as disabled.


Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 244397e..d9c30be 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1044,6 +1044,7 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 {
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct virtchnl_vlan_filter_list *vlan_list;
+	struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 	uint8_t cmd_buffer[sizeof(struct virtchnl_vlan_filter_list) +
 							sizeof(uint16_t)];
 	int err;
@@ -1060,8 +1061,21 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 	args.out_buffer = vf->aq_resp;
 	args.out_size = I40E_AQ_BUF_SZ;
 	err = i40evf_execute_vf_cmd(dev, &args);
-	if (err)
+	if (err) {
 		PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+		return err;
+	}
+	/*
+	 * In linux kernel driver on receiving ADD_VLAN it enables
+	 * VLAN_STRIP by default. So disable it if app confifured
+	 * it that way.
+	 */
+	if (!(dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_VLAN_STRIP)) {
+		err = i40evf_disable_vlan_strip(dev);
+		if (err)
+			PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+				"as a part of OP_ADD_VLAN");
+	}
 
 	return err;
 }
-- 
2.9.3.windows.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
  2020-12-11  3:07 ` Guo, Jia
@ 2020-12-12 12:26   ` Dey, Souvik
  0 siblings, 0 replies; 8+ messages in thread
From: Dey, Souvik @ 2020-12-12 12:26 UTC (permalink / raw)
  To: Guo, Jia, Xing, Beilei, Zhang, Qi Z; +Cc: dev

Hi Guo,
              Thanks for the comments. I will upload a v2 of the patch.

--
Regards,
Souvik

From: Guo, Jia <jia.guo@intel.com>
Sent: Thursday, December 10, 2020 10:08 PM
To: Dey, Souvik <sodey@rbbn.com>; Xing, Beilei <beilei.xing@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
Cc: dev@dpdk.org
Subject: RE: [PATCH] net/i40e: issue with ADD VLAN from Guest

________________________________
NOTICE: This email was received from an EXTERNAL sender
________________________________

hi, souvik

From: Souvik Dey <sodey@rbbn.com<mailto:sodey@rbbn.com>>
Sent: Thursday, December 10, 2020 1:55 AM
To: Xing, Beilei <beilei.xing@intel.com<mailto:beilei.xing@intel.com>>; Guo, Jia <jia.guo@intel.com<mailto:jia.guo@intel.com>>; Zhang, Qi Z <qi.z.zhang@intel.com<mailto:qi.z.zhang@intel.com>>
Cc: dev@dpdk.org<mailto:dev@dpdk.org>; Souvik Dey <sodey@rbbn.com<mailto:sodey@rbbn.com>>
Subject: [PATCH] net/i40e: issue with ADD VLAN from Guest

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to reconfigure the vlan_offload, which
checks for DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and enables or
disables the vlan strip in the PF.
Also rte_eth_dev_set_vlan_offload() to disable VLAN_STRIP cannot be used
from the application, as this will only work for the first time when
original and current confi mismatch, but for all subsequent call it will
ignore it.


Thanks for your patch and the clear detail interpret, what you said is reset the configuration about vlan strip that
would be change by the pf driver when adding vlan from vf, so I think concentrate<http://www.baidu.com/link?url=FKtXEQdgI9iuD4HN0uZIpf5hHCbYVGlPJx-jzQ-bGjXQiZutjIi6XT6rPlEoGfM13HvgvT9Gt88OAPmEKXNitp-rKK4k50M6di1HF4bDMxa&wd=&eqid=e7f451dc0001a611000000045fd2e0e1> the commit log to be more simple
in your way would be enough.

Signed-off-by: Souvik Dey <sodey@rbbn.com<mailto:sodey@rbbn.com>>
---
drivers/net/i40e/i40e_ethdev_vf.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index c26b036..2ecf74b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1078,8 +1078,19 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
args.out_buffer = vf->aq_resp;
args.out_size = I40E_AQ_BUF_SZ;
err = i40evf_execute_vf_cmd(dev, &args);
- if (err)
+ if (err) {
PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+ return err;

Would it be more code clean to use “goto err;”?

+ }
+ /*

/* -> /**, that would what I suggest.

+ * In linux kernel driver on receiving ADD_VLAN it enables
+ * VLAN_STRIP by default. So reconfigure the vlan_offload
+ * as it was done by the app earlier.
+ */
+ err = i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+ if (err)
+ PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+ "as a part of OP_ADD_VLAN");

If it is not coming as a command, please refine this log, such as “fail to set vlan strip.”


return err;
}
--
2.9.3.windows.1


________________________________
Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments.
________________________________

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
  2020-12-09 17:55 Souvik Dey
@ 2020-12-11  3:07 ` Guo, Jia
  2020-12-12 12:26   ` Dey, Souvik
  0 siblings, 1 reply; 8+ messages in thread
From: Guo, Jia @ 2020-12-11  3:07 UTC (permalink / raw)
  To: Souvik Dey, Xing, Beilei, Zhang, Qi Z; +Cc: dev

hi, souvik

From: Souvik Dey <sodey@rbbn.com>
Sent: Thursday, December 10, 2020 1:55 AM
To: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
Cc: dev@dpdk.org; Souvik Dey <sodey@rbbn.com>
Subject: [PATCH] net/i40e: issue with ADD VLAN from Guest

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to reconfigure the vlan_offload, which
checks for DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and enables or
disables the vlan strip in the PF.
Also rte_eth_dev_set_vlan_offload() to disable VLAN_STRIP cannot be used
from the application, as this will only work for the first time when
original and current confi mismatch, but for all subsequent call it will
ignore it.

Thanks for your patch and the clear detail interpret, what you said is reset the configuration about vlan strip that
would be change by the pf driver when adding vlan from vf, so I think concentrate<http://www.baidu.com/link?url=FKtXEQdgI9iuD4HN0uZIpf5hHCbYVGlPJx-jzQ-bGjXQiZutjIi6XT6rPlEoGfM13HvgvT9Gt88OAPmEKXNitp-rKK4k50M6di1HF4bDMxa&wd=&eqid=e7f451dc0001a611000000045fd2e0e1> the commit log to be more simple
in your way would be enough.

Signed-off-by: Souvik Dey <sodey@rbbn.com<mailto:sodey@rbbn.com>>
---
drivers/net/i40e/i40e_ethdev_vf.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index c26b036..2ecf74b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1078,8 +1078,19 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
args.out_buffer = vf->aq_resp;
args.out_size = I40E_AQ_BUF_SZ;
err = i40evf_execute_vf_cmd(dev, &args);
- if (err)
+ if (err) {
PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+ return err;

Would it be more code clean to use “goto err;”?

+ }
+ /*

/* -> /**, that would what I suggest.

+ * In linux kernel driver on receiving ADD_VLAN it enables
+ * VLAN_STRIP by default. So reconfigure the vlan_offload
+ * as it was done by the app earlier.
+ */
+ err = i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+ if (err)
+ PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+ "as a part of OP_ADD_VLAN");

If it is not coming as a command, please refine this log, such as “fail to set vlan strip.”


return err;
}
--
2.9.3.windows.1

________________________________
Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments.
________________________________

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
@ 2020-12-09 17:55 Souvik Dey
  2020-12-11  3:07 ` Guo, Jia
  0 siblings, 1 reply; 8+ messages in thread
From: Souvik Dey @ 2020-12-09 17:55 UTC (permalink / raw)
  To: beilei.xing, jia.guo, qi.z.zhang; +Cc: dev, Souvik Dey

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to reconfigure the vlan_offload, which
checks for DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and enables or
disables the vlan strip in the PF.
Also rte_eth_dev_set_vlan_offload() to disable VLAN_STRIP cannot be used
from the application, as this will only work for the first time when
original and current confi mismatch, but for all subsequent call it will
ignore it.

Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index c26b036..2ecf74b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1078,8 +1078,19 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 	args.out_buffer = vf->aq_resp;
 	args.out_size = I40E_AQ_BUF_SZ;
 	err = i40evf_execute_vf_cmd(dev, &args);
-	if (err)
+	if (err) {
 		PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+		return err;
+	}
+	/*
+	 * In linux kernel driver on receiving ADD_VLAN it enables
+	 * VLAN_STRIP by default. So reconfigure the vlan_offload
+	 * as it was done by the app earlier.
+	 */
+	err = i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+	if (err)
+		PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+			"as a part of OP_ADD_VLAN");
 
 	return err;
 }
-- 
2.9.3.windows.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
@ 2020-12-09 16:23 Souvik Dey
  0 siblings, 0 replies; 8+ messages in thread
From: Souvik Dey @ 2020-12-09 16:23 UTC (permalink / raw)
  To: beilei.xing, jia.guo, qi.z.zhang; +Cc: dev, Souvik Dey

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to reconfigure the vlan_offload, which
checks for DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and enables or
disables the vlan strip in the PF.
Also rte_eth_dev_set_vlan_offload() to disable VLAN_STRIP cannot be used
from the application, as this will only work for the first time when
original and current confi mismatch, but for all subsequent call it will
ignore it.

Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index c26b036..2ecf74b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1078,8 +1078,19 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 	args.out_buffer = vf->aq_resp;
 	args.out_size = I40E_AQ_BUF_SZ;
 	err = i40evf_execute_vf_cmd(dev, &args);
-	if (err)
+	if (err) {
 		PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+		return err;
+	}
+	/*
+	 * In linux kernel driver on receiving ADD_VLAN it enables
+	 * VLAN_STRIP by default. So reconfigure the vlan_offload
+	 * as it was done by the app earlier.
+	 */
+	err = i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK)
+	if (err)
+		PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+			"as a part of OP_ADD_VLAN");
 
 	return err;
 }
-- 
2.9.3.windows.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
  2020-04-14 21:58 Souvik Dey
@ 2020-09-14 15:54 ` Dey, Souvik
  0 siblings, 0 replies; 8+ messages in thread
From: Dey, Souvik @ 2020-09-14 15:54 UTC (permalink / raw)
  To: beilei.xing, qi.z.zhang; +Cc: dev

Hi Zhang,
I have submitted this patch way back in April and I see the patch has been deferred. Is there any particular reason behind that. As I have not received any communication about that was just wondering if there is something wrong that I might have done in the patch submission process to cause this.
Thanks for your help.
--
Regards,
Souvik

-----Original Message-----
From: Dey, Souvik <sodey@rbbn.com>
Sent: Tuesday, April 14, 2020 5:59 PM
To: beilei.xing@intel.com; qi.z.zhang@intel.com
Cc: dev@dpdk.org; Dey, Souvik <sodey@rbbn.com>
Subject: [PATCH] net/i40e: issue with ADD VLAN from Guest

From: "Dey, Souvik" <sodey@rbbn.com>

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver, along with add the vlan the kernel driver also enables the vlan stripping by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP as off at the port configuration. The app after adding the VLAN will expect the VLAN to be coming in the received packets but, due to VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app using i40e_pmd. So it is better to check the state of the DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and disable the vlan strip after sending add_vlan if app configured the VLAN_STRIP as disabled.


Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 244397e..b8b6c57 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1044,6 +1044,7 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)  {
 struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 struct virtchnl_vlan_filter_list *vlan_list;
+struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 uint8_t cmd_buffer[sizeof(struct virtchnl_vlan_filter_list) +
 sizeof(uint16_t)];
 int err;
@@ -1060,8 +1061,21 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 args.out_buffer = vf->aq_resp;
 args.out_size = I40E_AQ_BUF_SZ;
 err = i40evf_execute_vf_cmd(dev, &args);
-if (err)
+if (err) {
 PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+return ret;
+}
+/*
+ * In linux kernel driver on receiving ADD_VLAN it enables
+ * VLAN_STRIP by default. So disable it if app confifured
+ * it that way.
+ */
+if (!(dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_VLAN_STRIP)) {
+err = i40evf_disable_vlan_strip(dev);
+if (err)
+PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+"as a part of OP_ADD_VLAN");
+}

 return err;
 }
--
2.9.3.windows.1



^ permalink raw reply	[flat|nested] 8+ messages in thread

* [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
@ 2020-04-14 22:07 Souvik Dey
  0 siblings, 0 replies; 8+ messages in thread
From: Souvik Dey @ 2020-04-14 22:07 UTC (permalink / raw)
  To: beilei.xing, qi.z.zhang; +Cc: dev, Souvik Dey

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to check the state of the
DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and disable the vlan strip
after sending add_vlan if app configured the VLAN_STRIP as disabled.


Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 244397e..b8b6c57 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1044,6 +1044,7 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 {
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct virtchnl_vlan_filter_list *vlan_list;
+	struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 	uint8_t cmd_buffer[sizeof(struct virtchnl_vlan_filter_list) +
 							sizeof(uint16_t)];
 	int err;
@@ -1060,8 +1061,21 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 	args.out_buffer = vf->aq_resp;
 	args.out_size = I40E_AQ_BUF_SZ;
 	err = i40evf_execute_vf_cmd(dev, &args);
-	if (err)
+	if (err) {
 		PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+		return ret;
+	}
+	/*
+	 * In linux kernel driver on receiving ADD_VLAN it enables
+	 * VLAN_STRIP by default. So disable it if app confifured
+	 * it that way.
+	 */
+	if (!(dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_VLAN_STRIP)) {
+		err = i40evf_disable_vlan_strip(dev);
+		if (err)
+			PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+				"as a part of OP_ADD_VLAN");
+	}
 
 	return err;
 }
-- 
2.9.3.windows.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

* [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest
@ 2020-04-14 21:58 Souvik Dey
  2020-09-14 15:54 ` Dey, Souvik
  0 siblings, 1 reply; 8+ messages in thread
From: Souvik Dey @ 2020-04-14 21:58 UTC (permalink / raw)
  To: beilei.xing, qi.z.zhang; +Cc: dev, Dey, Souvik

From: "Dey, Souvik" <sodey@rbbn.com>

In case of i40evf pmd, when ADD_VLAN is sent down the linux i40e driver,
along with add the vlan the kernel driver also enables the vlan stripping
by default.
This might have issues if the app configured DEV_RX_OFFLOAD_VLAN_STRIP
as off at the port configuration. The app after adding the VLAN will
expect the VLAN to be coming in the received packets but, due to
VLAN_STRIP enabled at the PF, it will get stripped.
This behavior of the Linux driver causes confussion with the DPDK app
using i40e_pmd. So it is better to check the state of the
DEV_RX_OFFLOAD_VLAN_STRIP flag in the dev_conf and disable the vlan strip
after sending add_vlan if app configured the VLAN_STRIP as disabled.


Signed-off-by: Souvik Dey <sodey@rbbn.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 244397e..b8b6c57 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1044,6 +1044,7 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 {
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct virtchnl_vlan_filter_list *vlan_list;
+	struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 	uint8_t cmd_buffer[sizeof(struct virtchnl_vlan_filter_list) +
 							sizeof(uint16_t)];
 	int err;
@@ -1060,8 +1061,21 @@ i40evf_add_vlan(struct rte_eth_dev *dev, uint16_t vlanid)
 	args.out_buffer = vf->aq_resp;
 	args.out_size = I40E_AQ_BUF_SZ;
 	err = i40evf_execute_vf_cmd(dev, &args);
-	if (err)
+	if (err) {
 		PMD_DRV_LOG(ERR, "fail to execute command OP_ADD_VLAN");
+		return ret;
+	}
+	/*
+	 * In linux kernel driver on receiving ADD_VLAN it enables
+	 * VLAN_STRIP by default. So disable it if app confifured
+	 * it that way.
+	 */
+	if (!(dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_VLAN_STRIP)) {
+		err = i40evf_disable_vlan_strip(dev);
+		if (err)
+			PMD_DRV_LOG(ERR, "fail to execute command disable_vlan_strip "
+				"as a part of OP_ADD_VLAN");
+	}
 
 	return err;
 }
-- 
2.9.3.windows.1


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-12-12 12:27 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-14 23:06 [dpdk-dev] [PATCH] net/i40e: issue with ADD VLAN from Guest Souvik Dey
  -- strict thread matches above, loose matches on Subject: below --
2020-12-09 17:55 Souvik Dey
2020-12-11  3:07 ` Guo, Jia
2020-12-12 12:26   ` Dey, Souvik
2020-12-09 16:23 Souvik Dey
2020-04-14 22:07 Souvik Dey
2020-04-14 21:58 Souvik Dey
2020-09-14 15:54 ` Dey, Souvik

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