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Date:      Thu, 7 Nov 2019 12:58:15 +0000 (UTC)
From:      Hans Petter Selasky <hselasky@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org
Subject:   svn commit: r354438 - in stable/12/sys: amd64/conf netinet netinet6 sys
Message-ID:  <201911071258.xA7CwFRW071651@repo.freebsd.org>
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Author: hselasky
Date: Thu Nov  7 12:58:14 2019
New Revision: 354438
URL: https://svnweb.freebsd.org/changeset/base/354438

Log:
  Partial MFC of CSUM_SND_TAG flag from r348254.
  
  Add CSUM_SND_TAG flag and set this flag for outgoing ratelimited mbufs.
  
  This is a direct commit.
  
  Sponsored by:	Mellanox Technologies

Modified:
  stable/12/sys/amd64/conf/GENERIC
  stable/12/sys/netinet/ip_output.c
  stable/12/sys/netinet6/ip6_output.c
  stable/12/sys/sys/mbuf.h

Modified: stable/12/sys/amd64/conf/GENERIC
==============================================================================
--- stable/12/sys/amd64/conf/GENERIC	Thu Nov  7 11:50:53 2019	(r354437)
+++ stable/12/sys/amd64/conf/GENERIC	Thu Nov  7 12:58:14 2019	(r354438)
@@ -366,3 +366,5 @@ device		netmap			# netmap(4) support
 options 	EVDEV_SUPPORT		# evdev support in legacy drivers
 device		evdev			# input event device support
 device		uinput			# install /dev/uinput cdev
+
+options		RATELIMIT

Modified: stable/12/sys/netinet/ip_output.c
==============================================================================
--- stable/12/sys/netinet/ip_output.c	Thu Nov  7 11:50:53 2019	(r354437)
+++ stable/12/sys/netinet/ip_output.c	Thu Nov  7 12:58:14 2019	(r354438)
@@ -653,6 +653,7 @@ sendit:
 				in_pcboutput_txrtlmt(inp, ifp, m);
 			/* stamp send tag on mbuf */
 			m->m_pkthdr.snd_tag = inp->inp_snd_tag;
+			m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
 		} else {
 			m->m_pkthdr.snd_tag = NULL;
 		}
@@ -705,6 +706,7 @@ sendit:
 					in_pcboutput_txrtlmt(inp, ifp, m);
 				/* stamp send tag on mbuf */
 				m->m_pkthdr.snd_tag = inp->inp_snd_tag;
+				m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
 			} else {
 				m->m_pkthdr.snd_tag = NULL;
 			}

Modified: stable/12/sys/netinet6/ip6_output.c
==============================================================================
--- stable/12/sys/netinet6/ip6_output.c	Thu Nov  7 11:50:53 2019	(r354437)
+++ stable/12/sys/netinet6/ip6_output.c	Thu Nov  7 12:58:14 2019	(r354438)
@@ -966,6 +966,7 @@ passout:
 				in_pcboutput_txrtlmt(inp, ifp, m);
 			/* stamp send tag on mbuf */
 			m->m_pkthdr.snd_tag = inp->inp_snd_tag;
+			m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
 		} else {
 			m->m_pkthdr.snd_tag = NULL;
 		}
@@ -1081,6 +1082,7 @@ sendorfree:
 					in_pcboutput_txrtlmt(inp, ifp, m);
 				/* stamp send tag on mbuf */
 				m->m_pkthdr.snd_tag = inp->inp_snd_tag;
+				m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
 			} else {
 				m->m_pkthdr.snd_tag = NULL;
 			}

Modified: stable/12/sys/sys/mbuf.h
==============================================================================
--- stable/12/sys/sys/mbuf.h	Thu Nov  7 11:50:53 2019	(r354437)
+++ stable/12/sys/sys/mbuf.h	Thu Nov  7 12:58:14 2019	(r354438)
@@ -519,6 +519,8 @@ struct mbuf {
 #define	CSUM_L5_VALID		0x20000000	/* checksum is correct */
 #define	CSUM_COALESCED		0x40000000	/* contains merged segments */
 
+#define	CSUM_SND_TAG		0x80000000	/* Packet header has send tag */
+
 /*
  * CSUM flag description for use with printf(9) %b identifier.
  */
@@ -528,7 +530,7 @@ struct mbuf {
     "\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP\15CSUM_IP6_TSO" \
     "\16CSUM_IP6_ISCSI" \
     "\31CSUM_L3_CALC\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID" \
-    "\35CSUM_L5_CALC\36CSUM_L5_VALID\37CSUM_COALESCED"
+    "\35CSUM_L5_CALC\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG"
 
 /* CSUM flags compatibility mappings. */
 #define	CSUM_IP_CHECKED		CSUM_L3_CALC

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