diff mbox series

[v3] app/testpmd: perform SW IP checksum for GRO/GSO packets

Message ID 20220512010756.29553-1-wenwux.ma@intel.com (mailing list archive)
State Accepted
Delegated to: Andrew Rybchenko
Headers show
Series [v3] app/testpmd: perform SW IP checksum for GRO/GSO packets | expand

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ci/Intel-compilation success Compilation OK
ci/checkpatch success coding style OK

Commit Message

Ma, WenwuX May 12, 2022, 1:07 a.m. UTC
The GRO/GSO library doesn't re-calculate checksums for
merged/fragmented packets. If users want the packets to
have correct IP checksums, they should select HW IP
checksum calculation for the port which the packets are
transmitted to. But if the port doesn't support HW IP
checksum, users may perform a SW IP checksum. This patch
add the code about it.

Fixes: b7091f1dcfbc ("app/testpmd: enable the heavyweight mode TCP/IPv4 GRO")
Fixes: 52f38a2055ed ("app/testpmd: enable TCP/IPv4 VxLAN and GRE GSO")
Cc: stable@dpdk.org

Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
---
 app/test-pmd/csumonly.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

Comments

Jiayu Hu May 12, 2022, 1:33 a.m. UTC | #1
> -----Original Message-----
> From: Ma, WenwuX <wenwux.ma@intel.com>
> Sent: Thursday, May 12, 2022 9:08 AM
> To: Li, Xiaoyun <xiaoyun.li@intel.com>; Singh, Aman Deep
> <aman.deep.singh@intel.com>; Zhang, Yuying <yuying.zhang@intel.com>;
> dev@dpdk.org
> Cc: Hu, Jiayu <jiayu.hu@intel.com>; Wang, Yinan <yinan.wang@intel.com>;
> He, Xingguang <xingguang.he@intel.com>; Ma, WenwuX
> <wenwux.ma@intel.com>; stable@dpdk.org
> Subject: [PATCH v3] app/testpmd: perform SW IP checksum for GRO/GSO
> packets
> 
> The GRO/GSO library doesn't re-calculate checksums for merged/fragmented
> packets. If users want the packets to have correct IP checksums, they should
> select HW IP checksum calculation for the port which the packets are
> transmitted to. But if the port doesn't support HW IP checksum, users may
> perform a SW IP checksum. This patch add the code about it.
> 
> Fixes: b7091f1dcfbc ("app/testpmd: enable the heavyweight mode TCP/IPv4
> GRO")
> Fixes: 52f38a2055ed ("app/testpmd: enable TCP/IPv4 VxLAN and GRE GSO")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
> ---
>  app/test-pmd/csumonly.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index
> 8b6665d6f3..2498ee88a2 100644
> --- a/app/test-pmd/csumonly.c
> +++ b/app/test-pmd/csumonly.c
> @@ -778,6 +778,28 @@ pkt_copy_split(const struct rte_mbuf *pkt)
>  	return md[0];
>  }
> 
> +#if defined(RTE_LIB_GRO) || defined(RTE_LIB_GSO)
> +/*
> + * Re-calculate IP checksum for merged/fragmented packets.
> + */
> +static void
> +pkts_ip_csum_recalc(struct rte_mbuf **pkts_burst, const uint16_t
> +nb_pkts, uint64_t tx_offloads) {
> +	int i;
> +	struct rte_ipv4_hdr *ipv4_hdr;
> +	for (i = 0; i < nb_pkts; i++) {
> +		if ((pkts_burst[i]->ol_flags & RTE_MBUF_F_TX_IPV4) &&
> +			(tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM)
> == 0) {
> +			ipv4_hdr = rte_pktmbuf_mtod_offset(pkts_burst[i],
> +						struct rte_ipv4_hdr *,
> +						pkts_burst[i]->l2_len);
> +			ipv4_hdr->hdr_checksum = 0;
> +			ipv4_hdr->hdr_checksum =
> rte_ipv4_cksum(ipv4_hdr);
> +		}
> +	}
> +}
> +#endif
> +
>  /*
>   * Receive a burst of packets, and for each packet:
>   *  - parse packet, and try to recognize a supported packet type (1) @@ -
> 1098,6 +1120,8 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
>  				fs->gro_times = 0;
>  			}
>  		}
> +
> +		pkts_ip_csum_recalc(pkts_burst, nb_rx, tx_offloads);
>  	}
>  #endif
> 
> @@ -1131,6 +1155,8 @@ pkt_burst_checksum_forward(struct fwd_stream
> *fs)
> 
>  		tx_pkts_burst = gso_segments;
>  		nb_rx = nb_segments;
> +
> +		pkts_ip_csum_recalc(tx_pkts_burst, nb_rx, tx_offloads);
>  	} else
>  #endif
>  		tx_pkts_burst = pkts_burst;
> --
> 2.25.1

Reviewed-by: Jiayu Hu <jiayu.hu@intel.com>

Thanks,
Jiayu
Ling, WeiX May 17, 2022, 2:56 a.m. UTC | #2
> -----Original Message-----
> From: Wenwu Ma <wenwux.ma@intel.com>
> Sent: Thursday, May 12, 2022 9:08 AM
> To: Li, Xiaoyun <xiaoyun.li@intel.com>; Singh, Aman Deep
> <aman.deep.singh@intel.com>; Zhang, Yuying <yuying.zhang@intel.com>;
> dev@dpdk.org
> Cc: Hu, Jiayu <jiayu.hu@intel.com>; Wang, Yinan <yinan.wang@intel.com>;
> He, Xingguang <xingguang.he@intel.com>; Ma, WenwuX
> <wenwux.ma@intel.com>; stable@dpdk.org
> Subject: [PATCH v3] app/testpmd: perform SW IP checksum for GRO/GSO
> packets
> 
> The GRO/GSO library doesn't re-calculate checksums for
> merged/fragmented packets. If users want the packets to have correct IP
> checksums, they should select HW IP checksum calculation for the port which
> the packets are transmitted to. But if the port doesn't support HW IP
> checksum, users may perform a SW IP checksum. This patch add the code
> about it.
> 
> Fixes: b7091f1dcfbc ("app/testpmd: enable the heavyweight mode TCP/IPv4
> GRO")
> Fixes: 52f38a2055ed ("app/testpmd: enable TCP/IPv4 VxLAN and GRE GSO")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
> ---

Tested-by: Wei Ling <weix.ling@intel.com>
Yuying Zhang May 17, 2022, 4:02 p.m. UTC | #3
Hi Wenwu,
LGTM.

> -----Original Message-----
> From: Ma, WenwuX <wenwux.ma@intel.com>
> Sent: Thursday, May 12, 2022 9:08 AM
> To: Li, Xiaoyun <xiaoyun.li@intel.com>; Singh, Aman Deep
> <aman.deep.singh@intel.com>; Zhang, Yuying <yuying.zhang@intel.com>;
> dev@dpdk.org
> Cc: Hu, Jiayu <jiayu.hu@intel.com>; Wang, Yinan <yinan.wang@intel.com>;
> He, Xingguang <xingguang.he@intel.com>; Ma, WenwuX
> <wenwux.ma@intel.com>; stable@dpdk.org
> Subject: [PATCH v3] app/testpmd: perform SW IP checksum for GRO/GSO
> packets
> 
> The GRO/GSO library doesn't re-calculate checksums for merged/fragmented
> packets. If users want the packets to have correct IP checksums, they should
> select HW IP checksum calculation for the port which the packets are
> transmitted to. But if the port doesn't support HW IP checksum, users may
> perform a SW IP checksum. This patch add the code about it.
> 
> Fixes: b7091f1dcfbc ("app/testpmd: enable the heavyweight mode TCP/IPv4
> GRO")
> Fixes: 52f38a2055ed ("app/testpmd: enable TCP/IPv4 VxLAN and GRE GSO")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>

Acked-by: Yuying Zhang <yuying.zhang@intel.com>

> ---
>  app/test-pmd/csumonly.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index
> 8b6665d6f3..2498ee88a2 100644
> --- a/app/test-pmd/csumonly.c
> +++ b/app/test-pmd/csumonly.c
> @@ -778,6 +778,28 @@ pkt_copy_split(const struct rte_mbuf *pkt)
>  	return md[0];
>  }
> 
> +#if defined(RTE_LIB_GRO) || defined(RTE_LIB_GSO)
> +/*
> + * Re-calculate IP checksum for merged/fragmented packets.
> + */
> +static void
> +pkts_ip_csum_recalc(struct rte_mbuf **pkts_burst, const uint16_t
> +nb_pkts, uint64_t tx_offloads) {
> +	int i;
> +	struct rte_ipv4_hdr *ipv4_hdr;
> +	for (i = 0; i < nb_pkts; i++) {
> +		if ((pkts_burst[i]->ol_flags & RTE_MBUF_F_TX_IPV4) &&
> +			(tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM)
> == 0) {
> +			ipv4_hdr = rte_pktmbuf_mtod_offset(pkts_burst[i],
> +						struct rte_ipv4_hdr *,
> +						pkts_burst[i]->l2_len);
> +			ipv4_hdr->hdr_checksum = 0;
> +			ipv4_hdr->hdr_checksum =
> rte_ipv4_cksum(ipv4_hdr);
> +		}
> +	}
> +}
> +#endif
> +
>  /*
>   * Receive a burst of packets, and for each packet:
>   *  - parse packet, and try to recognize a supported packet type (1) @@ -
> 1098,6 +1120,8 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
>  				fs->gro_times = 0;
>  			}
>  		}
> +
> +		pkts_ip_csum_recalc(pkts_burst, nb_rx, tx_offloads);
>  	}
>  #endif
> 
> @@ -1131,6 +1155,8 @@ pkt_burst_checksum_forward(struct fwd_stream
> *fs)
> 
>  		tx_pkts_burst = gso_segments;
>  		nb_rx = nb_segments;
> +
> +		pkts_ip_csum_recalc(tx_pkts_burst, nb_rx, tx_offloads);
>  	} else
>  #endif
>  		tx_pkts_burst = pkts_burst;
> --
> 2.25.1
Andrew Rybchenko May 19, 2022, 8:23 a.m. UTC | #4
On 5/17/22 19:02, Zhang, Yuying wrote:
> Hi Wenwu,
> LGTM.
> 
>> -----Original Message-----
>> From: Ma, WenwuX <wenwux.ma@intel.com>
>> Sent: Thursday, May 12, 2022 9:08 AM
>> To: Li, Xiaoyun <xiaoyun.li@intel.com>; Singh, Aman Deep
>> <aman.deep.singh@intel.com>; Zhang, Yuying <yuying.zhang@intel.com>;
>> dev@dpdk.org
>> Cc: Hu, Jiayu <jiayu.hu@intel.com>; Wang, Yinan <yinan.wang@intel.com>;
>> He, Xingguang <xingguang.he@intel.com>; Ma, WenwuX
>> <wenwux.ma@intel.com>; stable@dpdk.org
>> Subject: [PATCH v3] app/testpmd: perform SW IP checksum for GRO/GSO
>> packets
>>
>> The GRO/GSO library doesn't re-calculate checksums for merged/fragmented
>> packets. If users want the packets to have correct IP checksums, they should
>> select HW IP checksum calculation for the port which the packets are
>> transmitted to. But if the port doesn't support HW IP checksum, users may
>> perform a SW IP checksum. This patch add the code about it.
>>
>> Fixes: b7091f1dcfbc ("app/testpmd: enable the heavyweight mode TCP/IPv4
>> GRO")
>> Fixes: 52f38a2055ed ("app/testpmd: enable TCP/IPv4 VxLAN and GRE GSO")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
> 
> Acked-by: Yuying Zhang <yuying.zhang@intel.com>

Since CI is happy with the patch now [1].

[1] https://lab.dpdk.org/results/dashboard/patchsets/22087/

Applied, thanks.
diff mbox series

Patch

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index 8b6665d6f3..2498ee88a2 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -778,6 +778,28 @@  pkt_copy_split(const struct rte_mbuf *pkt)
 	return md[0];
 }
 
+#if defined(RTE_LIB_GRO) || defined(RTE_LIB_GSO)
+/*
+ * Re-calculate IP checksum for merged/fragmented packets.
+ */
+static void
+pkts_ip_csum_recalc(struct rte_mbuf **pkts_burst, const uint16_t nb_pkts, uint64_t tx_offloads)
+{
+	int i;
+	struct rte_ipv4_hdr *ipv4_hdr;
+	for (i = 0; i < nb_pkts; i++) {
+		if ((pkts_burst[i]->ol_flags & RTE_MBUF_F_TX_IPV4) &&
+			(tx_offloads & RTE_ETH_TX_OFFLOAD_IPV4_CKSUM) == 0) {
+			ipv4_hdr = rte_pktmbuf_mtod_offset(pkts_burst[i],
+						struct rte_ipv4_hdr *,
+						pkts_burst[i]->l2_len);
+			ipv4_hdr->hdr_checksum = 0;
+			ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr);
+		}
+	}
+}
+#endif
+
 /*
  * Receive a burst of packets, and for each packet:
  *  - parse packet, and try to recognize a supported packet type (1)
@@ -1098,6 +1120,8 @@  pkt_burst_checksum_forward(struct fwd_stream *fs)
 				fs->gro_times = 0;
 			}
 		}
+
+		pkts_ip_csum_recalc(pkts_burst, nb_rx, tx_offloads);
 	}
 #endif
 
@@ -1131,6 +1155,8 @@  pkt_burst_checksum_forward(struct fwd_stream *fs)
 
 		tx_pkts_burst = gso_segments;
 		nb_rx = nb_segments;
+
+		pkts_ip_csum_recalc(tx_pkts_burst, nb_rx, tx_offloads);
 	} else
 #endif
 		tx_pkts_burst = pkts_burst;