svn commit: r301949 - stable/10/sys/netinet

[Sepherosa Ziehau]

Author: sephe
Date: Thu Jun 16 04:21:27 2016
New Revision: 301949
URL: https://svnweb.freebsd.org/changeset/base/301949

Log:
  MFC 297265
  
      tcp/lro: Return TCP_LRO_NO_ENTRIES if we are short of LRO entries.
  
      So that callers could react accordingly.
  
      Reviewed by:        gallatin (no objection)
      MFC after:  1 week
      Sponsored by:       Microsoft OSTC
      Differential Revision:      https://reviews.freebsd.org/D5695

Modified:
  stable/10/sys/netinet/tcp_lro.c
  stable/10/sys/netinet/tcp_lro.h
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/netinet/tcp_lro.c
==============================================================================
--- stable/10/sys/netinet/tcp_lro.c	Thu Jun 16 03:25:26 2016	(r301948)
+++ stable/10/sys/netinet/tcp_lro.c	Thu Jun 16 04:21:27 2016	(r301949)
@@ -570,7 +570,7 @@ tcp_lro_rx(struct lro_ctrl *lc, struct m
 
 	/* Try to find an empty slot. */
 	if (SLIST_EMPTY(&lc->lro_free))
-		return (TCP_LRO_CANNOT);
+		return (TCP_LRO_NO_ENTRIES);
 
 	/* Start a new segment chain. */
 	le = SLIST_FIRST(&lc->lro_free);

Modified: stable/10/sys/netinet/tcp_lro.h
==============================================================================
--- stable/10/sys/netinet/tcp_lro.h	Thu Jun 16 03:25:26 2016	(r301948)
+++ stable/10/sys/netinet/tcp_lro.h	Thu Jun 16 04:21:27 2016	(r301949)
@@ -90,6 +90,7 @@ void tcp_lro_flush_inactive(struct lro_c
 void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
 int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
 
+#define	TCP_LRO_NO_ENTRIES	-2
 #define	TCP_LRO_CANNOT		-1
 #define	TCP_LRO_NOT_SUPPORTED	1