[dpdk-stable] patch 'examples/l2fwd-crypto: fix packet length while decryption' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/12/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/ce88f40d2cef248653987021a49e156fd3ca7d57

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From ce88f40d2cef248653987021a49e156fd3ca7d57 Mon Sep 17 00:00:00 2001
From: Rohit Raj <rohit.raj at nxp.com>
Date: Fri, 9 Apr 2021 18:44:59 +0530
Subject: [PATCH] examples/l2fwd-crypto: fix packet length while decryption
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit 62c0b4484c455e9ba03d04dcf8403fef17e7d22d ]

There were some padding left when a packet gets decrypted. This
patch removes those padding.
This patch also removes the padding left after verifying auth of
the packet.

Fixes: e2cdfbd07c8a ("examples/l2fwd-crypto: fix port id type")

Signed-off-by: Rohit Raj <rohit.raj at nxp.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>
---
 examples/l2fwd-crypto/main.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/examples/l2fwd-crypto/main.c b/examples/l2fwd-crypto/main.c
index 12bd1812f5..656b140368 100644
--- a/examples/l2fwd-crypto/main.c
+++ b/examples/l2fwd-crypto/main.c
@@ -616,12 +616,26 @@ l2fwd_simple_forward(struct rte_mbuf *m, uint16_t portid,
 		struct l2fwd_crypto_options *options)
 {
 	uint16_t dst_port;
+	uint32_t pad_len;
+	struct rte_ipv4_hdr *ip_hdr;
+	uint32_t ipdata_offset = sizeof(struct rte_ether_hdr);
 
+	ip_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(m, char *) +
+					 ipdata_offset);
 	dst_port = l2fwd_dst_ports[portid];
 
 	if (options->mac_updating)
 		l2fwd_mac_updating(m, dst_port);
 
+	if (options->auth_xform.auth.op == RTE_CRYPTO_AUTH_OP_VERIFY)
+		rte_pktmbuf_trim(m, options->auth_xform.auth.digest_length);
+
+	if (options->cipher_xform.cipher.op == RTE_CRYPTO_CIPHER_OP_DECRYPT) {
+		pad_len = m->pkt_len - rte_be_to_cpu_16(ip_hdr->total_length) -
+			  ipdata_offset;
+		rte_pktmbuf_trim(m, pad_len);
+	}
+
 	l2fwd_send_packet(m, dst_port);
 }
 
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:31.093932100 +0800
+++ 0175-examples-l2fwd-crypto-fix-packet-length-while-decryp.patch	2021-05-10 23:59:26.610000000 +0800
@@ -1 +1 @@
-From 62c0b4484c455e9ba03d04dcf8403fef17e7d22d Mon Sep 17 00:00:00 2001
+From ce88f40d2cef248653987021a49e156fd3ca7d57 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit 62c0b4484c455e9ba03d04dcf8403fef17e7d22d ]
@@ -12 +14,0 @@
-Cc: stable at dpdk.org
@@ -21 +23 @@
-index 1016ceb841..23a398043e 100644
+index 12bd1812f5..656b140368 100644