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.
Since
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 <arybche...@solarflare.com>
Acked-by: Olivier Matz <olivier.m...@6wind.com>
---
v2:
- 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;
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
/*
* 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;
-#endif
if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
-#ifdef RTE_LIBRTE_ETHDEV_DEBUG
/*
* 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;
-#endif
if (ol_flags & PKT_TX_IPV4) {
ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
--
2.17.1
