svn commit: r190442 - in stable/7/sys: . contrib/pf dev/ath/ath_hal dev/cxgb netinet

[Robert Watson]

Author: rwatson
Date: Thu Mar 26 14:20:16 2009
New Revision: 190442
URL: http://svn.freebsd.org/changeset/base/190442

Log:
  Merge r189657 from head to stable/7:
  
    Add INP_INHASHLIST flag for inpcb->inp_flags to indicate whether
    or not the inpcb is currenty on various hash lookup lists, rather
    than using (lport != 0) to detect this.  This means that the full
    4-tuple of a connection can be retained after close, which should
    lead to more sensible netstat output in the window between TCP
    close and socket close.
  
  Approved by:	re (kib)

Modified:
  stable/7/sys/   (props changed)
  stable/7/sys/contrib/pf/   (props changed)
  stable/7/sys/dev/ath/ath_hal/   (props changed)
  stable/7/sys/dev/cxgb/   (props changed)
  stable/7/sys/netinet/in_pcb.c
  stable/7/sys/netinet/in_pcb.h

Modified: stable/7/sys/netinet/in_pcb.c
==============================================================================
--- stable/7/sys/netinet/in_pcb.c	Thu Mar 26 13:27:26 2009	(r190441)
+++ stable/7/sys/netinet/in_pcb.c	Thu Mar 26 14:20:16 2009	(r190442)
@@ -1,7 +1,7 @@
 /*-
  * Copyright (c) 1982, 1986, 1991, 1993, 1995
  *	The Regents of the University of California.
- * Copyright (c) 2007 Robert N. M. Watson
+ * Copyright (c) 2007-2009 Robert N. M. Watson
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -955,7 +955,7 @@ in_pcbdrop(struct inpcb *inp)
 	INP_WLOCK_ASSERT(inp);
 
 	inp->inp_vflag |= INP_DROPPED;
-	if (inp->inp_lport) {
+	if (inp->inp_flags & INP_INHASHLIST) {
 		struct inpcbport *phd = inp->inp_phd;
 
 		LIST_REMOVE(inp, inp_hash);
@@ -964,7 +964,7 @@ in_pcbdrop(struct inpcb *inp)
 			LIST_REMOVE(phd, phd_hash);
 			free(phd, M_PCB);
 		}
-		inp->inp_lport = 0;
+		inp->inp_flags &= ~INP_INHASHLIST;
 	}
 }
 
@@ -1344,6 +1344,8 @@ in_pcbinshash(struct inpcb *inp)
 
 	INP_INFO_WLOCK_ASSERT(pcbinfo);
 	INP_WLOCK_ASSERT(inp);
+	KASSERT((inp->inp_flags & INP_INHASHLIST) == 0,
+	    ("in_pcbinshash: INP_INHASHLIST"));
 
 #ifdef INET6
 	if (inp->inp_vflag & INP_IPV6)
@@ -1380,6 +1382,7 @@ in_pcbinshash(struct inpcb *inp)
 	inp->inp_phd = phd;
 	LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
 	LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
+	inp->inp_flags |= INP_INHASHLIST;
 	return (0);
 }
 
@@ -1398,6 +1401,8 @@ in_pcbrehash(struct inpcb *inp)
 
 	INP_INFO_WLOCK_ASSERT(pcbinfo);
 	INP_WLOCK_ASSERT(inp);
+	KASSERT(inp->inp_flags & INP_INHASHLIST,
+	    ("in_pcbrehash: !INP_INHASHLIST"));
 
 #ifdef INET6
 	if (inp->inp_vflag & INP_IPV6)
@@ -1425,7 +1430,7 @@ in_pcbremlists(struct inpcb *inp)
 	INP_WLOCK_ASSERT(inp);
 
 	inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
-	if (inp->inp_lport) {
+	if (inp->inp_flags & INP_INHASHLIST) {
 		struct inpcbport *phd = inp->inp_phd;
 
 		LIST_REMOVE(inp, inp_hash);
@@ -1434,6 +1439,7 @@ in_pcbremlists(struct inpcb *inp)
 			LIST_REMOVE(phd, phd_hash);
 			free(phd, M_PCB);
 		}
+		inp->inp_flags &= ~INP_INHASHLIST;
 	}
 	LIST_REMOVE(inp, inp_list);
 	pcbinfo->ipi_count--;

Modified: stable/7/sys/netinet/in_pcb.h
==============================================================================
--- stable/7/sys/netinet/in_pcb.h	Thu Mar 26 13:27:26 2009	(r190441)
+++ stable/7/sys/netinet/in_pcb.h	Thu Mar 26 14:20:16 2009	(r190442)
@@ -436,6 +436,7 @@ void 	inp_4tuple_get(struct inpcb *inp, 
 #define	INP_FAITH		0x200	/* accept FAITH'ed connections */
 #define	INP_RECVTTL		0x400	/* receive incoming IP TTL */
 #define	INP_DONTFRAG		0x800	/* don't fragment packet */
+#define	INP_INHASHLIST		0x2000	/* in_pcbinshash() has been called */
 
 #define IN6P_IPV6_V6ONLY	0x008000 /* restrict AF_INET6 socket for v6 */