Author: hselasky
Date: Tue Feb 10 13:36:37 2015
New Revision: 278513
URL: https://svnweb.freebsd.org/changeset/base/278513
Log:
MFC r278103:
The flowid and hashtype should be copied from the originating packet
when fragmenting IP packets to preserve the order of the packets in a
stream. Else the resulting fragments can be sent out of order when the
hardware supports multiple transmit rings.
Sponsored by: Mellanox Technologies
Modified:
stable/9/sys/netinet/ip_output.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/netinet/ip_output.c
==============================================================================
--- stable/9/sys/netinet/ip_output.c Tue Feb 10 13:34:45 2015
(r278512)
+++ stable/9/sys/netinet/ip_output.c Tue Feb 10 13:36:37 2015
(r278513)
@@ -787,7 +787,11 @@ smart_frag_failure:
IPSTAT_INC(ips_odropped);
goto done;
}
- m->m_flags |= (m0->m_flags & M_MCAST) | M_FRAG;
+ /* copy multicast and flowid flag, if any */
+ m->m_flags |= (m0->m_flags & (M_FLOWID | M_MCAST)) | M_FRAG;
+ /* make sure the flowid is the same for the fragmented mbufs */
+ M_HASHTYPE_SET(m, M_HASHTYPE_GET(m0));
+ m->m_pkthdr.flowid = m0->m_pkthdr.flowid;
/*
* In the first mbuf, leave room for the link header, then
* copy the original IP header including options. The payload
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