[PATCH v3] app/test-crypto-perf: fix segment size for IPsec operation

[Gagandeep Singh <g.singh@nxp.com>]

Application calculates segment size based on buffer size plus
digest size only, But if the operation mode is IPsec then
packet length can be increased by some more bytes depends upon
the algorithm.

In this patch, increasing segment size with RTE_PKTMBUF_HEADROOM
when there is no user given segment size.

Fixes: 28dde5da503e ("app/crypto-perf: support lookaside IPsec")

Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
---
v2-change-log:
    Update commit message with fixline.
v3-change-log:
    increasing the segment sizeby headroom size instead of
    an algo specific max overhead value.

 app/test-crypto-perf/cperf_options_parsing.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/app/test-crypto-perf/cperf_options_parsing.c b/app/test-crypto-perf/cperf_options_parsing.c
index c244f81bbf..771e116ebb 100644
--- a/app/test-crypto-perf/cperf_options_parsing.c
+++ b/app/test-crypto-perf/cperf_options_parsing.c
@@ -1132,9 +1132,17 @@ cperf_options_check(struct cperf_options *options)
 	 * If segment size is not set, assume only one segment,
 	 * big enough to contain the largest buffer and the digest
 	 */
-	if (options->segment_sz == 0)
+	if (options->segment_sz == 0) {
 		options->segment_sz = options->max_buffer_size +
 				options->digest_sz;
+		/* In IPsec operation, packet length will be increased
+		 * by some bytes depend upon the algorithm, so increasing
+		 * the segment size by headroom to cover the most of
+		 * the scenarios.
+		 */
+		if (options->op_type == CPERF_IPSEC)
+			options->segment_sz += RTE_PKTMBUF_HEADROOM;
+	}
 
 	if (options->segment_sz < options->digest_sz) {
 		RTE_LOG(ERR, USER1,
-- 
2.25.1