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From: Andrew Rybchenko <arybchenko@solarflare.com>
To: <dev@dpdk.org>
Cc: Olivier Matz <olivier.matz@6wind.com>
Subject: [dpdk-dev] [PATCH v2] net: do fragmented headers check in non-debug build as well
Date: Mon, 13 Jul 2020 15:22:34 +0100	[thread overview]
Message-ID: <1594650154-31408-1-git-send-email-arybchenko@solarflare.com> (raw)
In-Reply-To: <1590589976-2915-1-git-send-email-arybchenko@solarflare.com>

Pseudo-header checksum calculation requires contiguous headers.
There is no any formal requirements on data location and mbuf
structure which could be used by the application.


commit dfc6b2fd8da3 ("mbuf: remove Intel offload checks from generic API")

fragmented headers checks are done inside
rte_net_intel_cksum_flags_prepare() in RTE_LIBRTE_ETHDEV_DEBUG build
because it is moved from rte_validate_tx_offload() which is called
under debug only.

Make corresponding check to be done in non-debug build as well
to avoid bad accesses, incorrect checksum calculation and to
return appropriate error from Tx prepare.

Make no-offloads check more precise and do it in non-debug build
as well to avoid contiguous headers check and Tx prepare failure
if it is not actually required.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
 - fix typo in description
 - mention dfc6b2fd8da3 in the description

 lib/librte_net/rte_net.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/librte_net/rte_net.h b/lib/librte_net/rte_net.h
index 1560ecfa46..1edc283a47 100644
--- a/lib/librte_net/rte_net.h
+++ b/lib/librte_net/rte_net.h
@@ -120,20 +120,17 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
 	struct rte_udp_hdr *udp_hdr;
 	uint64_t inner_l3_offset = m->l2_len;
 	 * Does packet set any of available offloads?
 	 * Mainly it is required to avoid fragmented headers check if
 	 * no offloads are requested.
-	if (!(ol_flags & PKT_TX_OFFLOAD_MASK))
+	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK)))
 		return 0;
 	if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
 		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
 	 * Check if headers are fragmented.
 	 * The check could be less strict depending on which offloads are
@@ -142,7 +139,6 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
 	if (unlikely(rte_pktmbuf_data_len(m) <
 		     inner_l3_offset + m->l3_len + m->l4_len))
 		return -ENOTSUP;
 	if (ol_flags & PKT_TX_IPV4) {
 		ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,

  parent reply	other threads:[~2020-07-13 14:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-27 14:32 [dpdk-dev] [PATCH] " Andrew Rybchenko
2020-07-13 13:35 ` Olivier Matz
2020-07-13 14:22   ` Andrew Rybchenko
2020-07-13 14:22 ` Andrew Rybchenko [this message]
2020-07-21  0:53   ` [dpdk-dev] [PATCH v2] " Ferruh Yigit

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