Author: hselasky
Date: Mon Feb 2 17:32:50 2015
New Revision: 278103
URL: https://svnweb.freebsd.org/changeset/base/278103
Log:
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.
Reviewed by: glebius @
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/netinet/ip_output.c
Modified: head/sys/netinet/ip_output.c
==============================================================================
--- head/sys/netinet/ip_output.c Mon Feb 2 16:19:11 2015
(r278102)
+++ head/sys/netinet/ip_output.c Mon Feb 2 17:32:50 2015
(r278103)
@@ -789,6 +789,10 @@ smart_frag_failure:
IPSTAT_INC(ips_odropped);
goto done;
}
+ /* 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;
+ /* copy multicast flag, if any */
m->m_flags |= (m0->m_flags & M_MCAST);
/*
* In the first mbuf, leave room for the link header, then
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