[PATCH net-next 0/6] net: support SCTP CRC csum offload for tunneling packets in some drivers

[PATCH net-next 0/6] net: support SCTP CRC csum offload for tunneling packets in some drivers

[Xin Long]

This patchset introduces inline function skb_csum_is_sctp(), and uses it
to validate it's a sctp CRC csum offload packet, to make SCTP CRC csum
offload for tunneling packets supported in some HW drivers.

Xin Long (6):
  net: add inline function skb_csum_is_sctp
  net: igb: use skb_csum_is_sctp instead of protocol check
  net: igbvf: use skb_csum_is_sctp instead of protocol check
  net: igc: use skb_csum_is_sctp instead of protocol check
  net: ixgbe: use skb_csum_is_sctp instead of protocol check
  net: ixgbevf: use skb_csum_is_sctp instead of protocol check

 drivers/net/ethernet/intel/igb/igb_main.c         | 14 +-------------
 drivers/net/ethernet/intel/igbvf/netdev.c         | 14 +-------------
 drivers/net/ethernet/intel/igc/igc_main.c         | 14 +-------------
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c     | 14 +-------------
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 14 +-------------
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c  |  2 +-
 include/linux/skbuff.h                            |  5 +++++
 net/core/dev.c                                    |  2 +-
 8 files changed, 12 insertions(+), 67 deletions(-)

-- 
2.1.0

[PATCH net-next 1/6] net: add inline function skb_csum_is_sctp

[Xin Long]

This patch is to define a inline function skb_csum_is_sctp(), and
also replace all places where it checks if it's a SCTP CSUM skb.
This function would be used later in many networking drivers in
the following patches.

Suggested-by: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 2 +-
 include/linux/skbuff.h                           | 5 +++++
 net/core/dev.c                                   | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index ac4cd5d..162a1ff 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -979,7 +979,7 @@ static int ionic_tx_calc_csum(struct ionic_queue *q, struct sk_buff *skb)
 		stats->vlan_inserted++;
 	}
 
-	if (skb->csum_not_inet)
+	if (skb_csum_is_sctp(skb))
 		stats->crc32_csum++;
 	else
 		stats->csum++;
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index c9568cf..46f901a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -4621,6 +4621,11 @@ static inline void skb_reset_redirect(struct sk_buff *skb)
 #endif
 }
 
+static inline bool skb_csum_is_sctp(struct sk_buff *skb)
+{
+	return skb->csum_not_inet;
+}
+
 static inline void skb_set_kcov_handle(struct sk_buff *skb,
 				       const u64 kcov_handle)
 {
diff --git a/net/core/dev.c b/net/core/dev.c
index 0a31d4e..bbd306f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3617,7 +3617,7 @@ static struct sk_buff *validate_xmit_vlan(struct sk_buff *skb,
 int skb_csum_hwoffload_help(struct sk_buff *skb,
 			    const netdev_features_t features)
 {
-	if (unlikely(skb->csum_not_inet))
+	if (unlikely(skb_csum_is_sctp(skb)))
 		return !!(features & NETIF_F_SCTP_CRC) ? 0 :
 			skb_crc32c_csum_help(skb);
 
-- 
2.1.0

[PATCH net-next 2/6] net: igb: use skb_csum_is_sctp instead of protocol check

[Xin Long]

Using skb_csum_is_sctp is a easier way to validate it's a SCTP
CRC checksum offload packet, and there is no need to parse the
packet to check its proto field, especially when it's a UDP or
GRE encapped packet.

So this patch also makes igb support SCTP CRC checksum offload
for UDP and GRE encapped packets.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 03f78fd..8757ad0 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -5959,15 +5959,6 @@ static int igb_tso(struct igb_ring *tx_ring,
 	return 1;
 }
 
-static inline bool igb_ipv6_csum_is_sctp(struct sk_buff *skb)
-{
-	unsigned int offset = 0;
-
-	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
-
-	return offset == skb_checksum_start_offset(skb);
-}
-
 static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first)
 {
 	struct sk_buff *skb = first->skb;
@@ -5990,10 +5981,7 @@ static void igb_tx_csum(struct igb_ring *tx_ring, struct igb_tx_buffer *first)
 		break;
 	case offsetof(struct sctphdr, checksum):
 		/* validate that this is actually an SCTP request */
-		if (((first->protocol == htons(ETH_P_IP)) &&
-		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
-		    ((first->protocol == htons(ETH_P_IPV6)) &&
-		     igb_ipv6_csum_is_sctp(skb))) {
+		if (skb_csum_is_sctp(skb)) {
 			type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
 			break;
 		}
-- 
2.1.0

[PATCH net-next 3/6] net: igbvf: use skb_csum_is_sctp instead of protocol check

[Xin Long]

Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
checksum offload packet, and yet it also makes igbvf support SCTP
CRC checksum offload for UDP and GRE encapped packets, just as it
does in igb driver.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/intel/igbvf/netdev.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 30fdea2..fb3fbcb 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -2072,15 +2072,6 @@ static int igbvf_tso(struct igbvf_ring *tx_ring,
 	return 1;
 }
 
-static inline bool igbvf_ipv6_csum_is_sctp(struct sk_buff *skb)
-{
-	unsigned int offset = 0;
-
-	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
-
-	return offset == skb_checksum_start_offset(skb);
-}
-
 static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
 			  u32 tx_flags, __be16 protocol)
 {
@@ -2102,10 +2093,7 @@ static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
 		break;
 	case offsetof(struct sctphdr, checksum):
 		/* validate that this is actually an SCTP request */
-		if (((protocol == htons(ETH_P_IP)) &&
-		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
-		    ((protocol == htons(ETH_P_IPV6)) &&
-		     igbvf_ipv6_csum_is_sctp(skb))) {
+		if (skb_csum_is_sctp(skb)) {
 			type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
 			break;
 		}
-- 
2.1.0

[PATCH net-next 4/6] net: igc: use skb_csum_is_sctp instead of protocol check

[Xin Long]

Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
checksum offload packet, and yet it also makes igc support SCTP
CRC checksum offload for UDP and GRE encapped packets, just as it
does in igb driver.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index afd6a62..43aec42 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -949,15 +949,6 @@ static void igc_tx_ctxtdesc(struct igc_ring *tx_ring,
 	}
 }
 
-static inline bool igc_ipv6_csum_is_sctp(struct sk_buff *skb)
-{
-	unsigned int offset = 0;
-
-	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
-
-	return offset == skb_checksum_start_offset(skb);
-}
-
 static void igc_tx_csum(struct igc_ring *tx_ring, struct igc_tx_buffer *first)
 {
 	struct sk_buff *skb = first->skb;
@@ -980,10 +971,7 @@ static void igc_tx_csum(struct igc_ring *tx_ring, struct igc_tx_buffer *first)
 		break;
 	case offsetof(struct sctphdr, checksum):
 		/* validate that this is actually an SCTP request */
-		if ((first->protocol == htons(ETH_P_IP) &&
-		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
-		    (first->protocol == htons(ETH_P_IPV6) &&
-		     igc_ipv6_csum_is_sctp(skb))) {
+		if (skb_csum_is_sctp(skb)) {
 			type_tucmd = IGC_ADVTXD_TUCMD_L4T_SCTP;
 			break;
 		}
-- 
2.1.0

[PATCH net-next 5/6] net: ixgbe: use skb_csum_is_sctp instead of protocol check

[Xin Long]

Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
checksum offload packet, and yet it also makes ixgbe support SCTP
CRC checksum offload for UDP and GRE encapped packets, just as it
does in igb driver.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 6cbbe09..2973c54 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -8040,15 +8040,6 @@ static int ixgbe_tso(struct ixgbe_ring *tx_ring,
 	return 1;
 }
 
-static inline bool ixgbe_ipv6_csum_is_sctp(struct sk_buff *skb)
-{
-	unsigned int offset = 0;
-
-	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
-
-	return offset == skb_checksum_start_offset(skb);
-}
-
 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
 			  struct ixgbe_tx_buffer *first,
 			  struct ixgbe_ipsec_tx_data *itd)
@@ -8074,10 +8065,7 @@ static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
 		break;
 	case offsetof(struct sctphdr, checksum):
 		/* validate that this is actually an SCTP request */
-		if (((first->protocol == htons(ETH_P_IP)) &&
-		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
-		    ((first->protocol == htons(ETH_P_IPV6)) &&
-		     ixgbe_ipv6_csum_is_sctp(skb))) {
+		if (skb_csum_is_sctp(skb)) {
 			type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
 			break;
 		}
-- 
2.1.0

[PATCH net-next 6/6] net: ixgbevf: use skb_csum_is_sctp instead of protocol check

[Xin Long]

Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
checksum offload packet, and yet it also makes ixgbevf support SCTP
CRC checksum offload for UDP and GRE encapped packets, just as it
does in igb driver.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 4061cd7..cd9d79f 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -3844,15 +3844,6 @@ static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
 	return 1;
 }
 
-static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff *skb)
-{
-	unsigned int offset = 0;
-
-	ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
-
-	return offset == skb_checksum_start_offset(skb);
-}
-
 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
 			    struct ixgbevf_tx_buffer *first,
 			    struct ixgbevf_ipsec_tx_data *itd)
@@ -3873,10 +3864,7 @@ static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
 		break;
 	case offsetof(struct sctphdr, checksum):
 		/* validate that this is actually an SCTP request */
-		if (((first->protocol == htons(ETH_P_IP)) &&
-		     (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
-		    ((first->protocol == htons(ETH_P_IPV6)) &&
-		     ixgbevf_ipv6_csum_is_sctp(skb))) {
+		if (skb_csum_is_sctp(skb)) {
 			type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
 			break;
 		}
-- 
2.1.0

Re: [PATCH net-next 6/6] net: ixgbevf: use skb_csum_is_sctp instead of protocol check

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:14 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
> checksum offload packet, and yet it also makes ixgbevf support SCTP
> CRC checksum offload for UDP and GRE encapped packets, just as it
> does in igb driver.
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Re: [PATCH net-next 5/6] net: ixgbe: use skb_csum_is_sctp instead of protocol check

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:14 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
> checksum offload packet, and yet it also makes ixgbe support SCTP
> CRC checksum offload for UDP and GRE encapped packets, just as it
> does in igb driver.
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Re: [PATCH net-next 4/6] net: igc: use skb_csum_is_sctp instead of protocol check

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:14 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
> checksum offload packet, and yet it also makes igc support SCTP
> CRC checksum offload for UDP and GRE encapped packets, just as it
> does in igb driver.
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Re: [PATCH net-next 3/6] net: igbvf: use skb_csum_is_sctp instead of protocol check

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:14 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> Using skb_csum_is_sctp is a easier way to validate it's a SCTP CRC
> checksum offload packet, and yet it also makes igbvf support SCTP
> CRC checksum offload for UDP and GRE encapped packets, just as it
> does in igb driver.
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Re: [PATCH net-next 2/6] net: igb: use skb_csum_is_sctp instead of protocol check

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:14 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> Using skb_csum_is_sctp is a easier way to validate it's a SCTP
> CRC checksum offload packet, and there is no need to parse the
> packet to check its proto field, especially when it's a UDP or
> GRE encapped packet.
>
> So this patch also makes igb support SCTP CRC checksum offload
> for UDP and GRE encapped packets.
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Re: [PATCH net-next 1/6] net: add inline function skb_csum_is_sctp

[Alexander Duyck]

On Fri, Jan 15, 2021 at 10:13 PM Xin Long <lucien.xin@gmail.com> wrote:
>
> This patch is to define a inline function skb_csum_is_sctp(), and
> also replace all places where it checks if it's a SCTP CSUM skb.
> This function would be used later in many networking drivers in
> the following patches.
>
> Suggested-by: Alexander Duyck <alexander.duyck@gmail.com>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>

One minor nit. If you had to resubmit this I might move the ionic
driver code into a separate patch. However It can probably be accepted
as is.

Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

> ---
>  drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 2 +-
>  include/linux/skbuff.h                           | 5 +++++
>  net/core/dev.c                                   | 2 +-
>  3 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
> index ac4cd5d..162a1ff 100644
> --- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
> +++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
> @@ -979,7 +979,7 @@ static int ionic_tx_calc_csum(struct ionic_queue *q, struct sk_buff *skb)
>                 stats->vlan_inserted++;
>         }
>
> -       if (skb->csum_not_inet)
> +       if (skb_csum_is_sctp(skb))
>                 stats->crc32_csum++;
>         else
>                 stats->csum++;
> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
> index c9568cf..46f901a 100644
> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -4621,6 +4621,11 @@ static inline void skb_reset_redirect(struct sk_buff *skb)
>  #endif
>  }
>
> +static inline bool skb_csum_is_sctp(struct sk_buff *skb)
> +{
> +       return skb->csum_not_inet;
> +}
> +
>  static inline void skb_set_kcov_handle(struct sk_buff *skb,
>                                        const u64 kcov_handle)
>  {
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 0a31d4e..bbd306f 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -3617,7 +3617,7 @@ static struct sk_buff *validate_xmit_vlan(struct sk_buff *skb,
>  int skb_csum_hwoffload_help(struct sk_buff *skb,
>                             const netdev_features_t features)
>  {
> -       if (unlikely(skb->csum_not_inet))
> +       if (unlikely(skb_csum_is_sctp(skb)))
>                 return !!(features & NETIF_F_SCTP_CRC) ? 0 :
>                         skb_crc32c_csum_help(skb);
>
> --
> 2.1.0
>

Re: [PATCH net-next 1/6] net: add inline function skb_csum_is_sctp

[Shannon Nelson]

On 1/19/21 2:23 PM, Alexander Duyck wrote:
> On Fri, Jan 15, 2021 at 10:13 PM Xin Long <lucien.xin@gmail.com> wrote:
>> This patch is to define a inline function skb_csum_is_sctp(), and
>> also replace all places where it checks if it's a SCTP CSUM skb.
>> This function would be used later in many networking drivers in
>> the following patches.
>>
>> Suggested-by: Alexander Duyck <alexander.duyck@gmail.com>
>> Signed-off-by: Xin Long <lucien.xin@gmail.com>
> One minor nit. If you had to resubmit this I might move the ionic
> driver code into a separate patch. However It can probably be accepted
> as is.
>
> Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>

Alex has a good point - if you repost, please split out the ionic bits 
to a separate patch.

Either way, for ionic:
Acked-by: Shannon Nelson <snelson@pensando.io>


>> ---
>>   drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 2 +-
>>   include/linux/skbuff.h                           | 5 +++++
>>   net/core/dev.c                                   | 2 +-
>>   3 files changed, 7 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
>> index ac4cd5d..162a1ff 100644
>> --- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
>> @@ -979,7 +979,7 @@ static int ionic_tx_calc_csum(struct ionic_queue *q, struct sk_buff *skb)
>>                  stats->vlan_inserted++;
>>          }
>>
>> -       if (skb->csum_not_inet)
>> +       if (skb_csum_is_sctp(skb))
>>                  stats->crc32_csum++;
>>          else
>>                  stats->csum++;
>> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
>> index c9568cf..46f901a 100644
>> --- a/include/linux/skbuff.h
>> +++ b/include/linux/skbuff.h
>> @@ -4621,6 +4621,11 @@ static inline void skb_reset_redirect(struct sk_buff *skb)
>>   #endif
>>   }
>>
>> +static inline bool skb_csum_is_sctp(struct sk_buff *skb)
>> +{
>> +       return skb->csum_not_inet;
>> +}
>> +
>>   static inline void skb_set_kcov_handle(struct sk_buff *skb,
>>                                         const u64 kcov_handle)
>>   {
>> diff --git a/net/core/dev.c b/net/core/dev.c
>> index 0a31d4e..bbd306f 100644
>> --- a/net/core/dev.c
>> +++ b/net/core/dev.c
>> @@ -3617,7 +3617,7 @@ static struct sk_buff *validate_xmit_vlan(struct sk_buff *skb,
>>   int skb_csum_hwoffload_help(struct sk_buff *skb,
>>                              const netdev_features_t features)
>>   {
>> -       if (unlikely(skb->csum_not_inet))
>> +       if (unlikely(skb_csum_is_sctp(skb)))
>>                  return !!(features & NETIF_F_SCTP_CRC) ? 0 :
>>                          skb_crc32c_csum_help(skb);
>>
>> --
>> 2.1.0
>>

Re: [PATCH net-next 0/6] net: support SCTP CRC csum offload for tunneling packets in some drivers

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Sat, 16 Jan 2021 14:13:36 +0800 you wrote:
> This patchset introduces inline function skb_csum_is_sctp(), and uses it
> to validate it's a sctp CRC csum offload packet, to make SCTP CRC csum
> offload for tunneling packets supported in some HW drivers.
> 
> Xin Long (6):
>   net: add inline function skb_csum_is_sctp
>   net: igb: use skb_csum_is_sctp instead of protocol check
>   net: igbvf: use skb_csum_is_sctp instead of protocol check
>   net: igc: use skb_csum_is_sctp instead of protocol check
>   net: ixgbe: use skb_csum_is_sctp instead of protocol check
>   net: ixgbevf: use skb_csum_is_sctp instead of protocol check
> 
> [...]

Here is the summary with links:
  - [net-next,1/6] net: add inline function skb_csum_is_sctp
    https://git.kernel.org/netdev/net-next/c/fa8211701043
  - [net-next,2/6] net: igb: use skb_csum_is_sctp instead of protocol check
    https://git.kernel.org/netdev/net-next/c/8bcf02035bd5
  - [net-next,3/6] net: igbvf: use skb_csum_is_sctp instead of protocol check
    https://git.kernel.org/netdev/net-next/c/d2de44443caf
  - [net-next,4/6] net: igc: use skb_csum_is_sctp instead of protocol check
    https://git.kernel.org/netdev/net-next/c/609d29a9d242
  - [net-next,5/6] net: ixgbe: use skb_csum_is_sctp instead of protocol check
    https://git.kernel.org/netdev/net-next/c/f8c4b01d3a68
  - [net-next,6/6] net: ixgbevf: use skb_csum_is_sctp instead of protocol check
    https://git.kernel.org/netdev/net-next/c/fc186d0a4ef8

You are awesome, thank you!
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