From fc49e03d2ce94c45ba8eaa2a8f4bd853e50998fe Mon Sep 17 00:00:00 2001
From: Grigoriy Orlov <gluk@cvs.openbsd.org>
Date: Fri, 6 Apr 2001 18:59:18 +0000
Subject: Change softdep_count_dependencies interface so that it may be called
 from interrupt at splbio.

costa@ ok.
---
 sys/sys/buf.h             |  8 ++++----
 sys/ufs/ffs/ffs_softdep.c | 16 ++++++++++------
 2 files changed, 14 insertions(+), 10 deletions(-)

(limited to 'sys')

diff --git a/sys/sys/buf.h b/sys/sys/buf.h
index 46b5cc8c0fe..8d39afee064 100644
--- a/sys/sys/buf.h
+++ b/sys/sys/buf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: buf.h,v 1.21 2001/03/20 17:30:07 gluk Exp $	*/
+/*	$OpenBSD: buf.h,v 1.22 2001/04/06 18:59:17 gluk Exp $	*/
 /*	$NetBSD: buf.h,v 1.25 1997/04/09 21:12:17 mycroft Exp $	*/
 
 /*
@@ -67,7 +67,7 @@ extern struct bio_ops {
 	void	(*io_complete) __P((struct buf *));
 	void	(*io_deallocate) __P((struct buf *));
 	void	(*io_movedeps) __P((struct buf *, struct buf *));
-	int	(*io_countdeps) __P((struct buf *, int));
+	int	(*io_countdeps) __P((struct buf *, int, int));
 } bioops;
  
 
@@ -261,10 +261,10 @@ buf_movedeps(struct buf *bp, struct buf *bp2)
 }
 
 static __inline int
-buf_countdeps(struct buf *bp, int i)
+buf_countdeps(struct buf *bp, int i, int islocked)
 {
         if (bioops.io_countdeps)
-                return ((*bioops.io_countdeps)(bp, i));
+                return ((*bioops.io_countdeps)(bp, i, islocked));
         else
                 return (0);
 }
diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
index 6018663b7b0..1dea5971c61 100644
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_softdep.c,v 1.21 2001/04/04 20:19:03 gluk Exp $	*/
+/*	$OpenBSD: ffs_softdep.c,v 1.22 2001/04/06 18:59:16 gluk Exp $	*/
 /*
  * Copyright 1998, 2000 Marshall Kirk McKusick. All Rights Reserved.
  *
@@ -168,7 +168,7 @@ void softdep_disk_io_initiation __P((struct buf *));
 void softdep_disk_write_complete __P((struct buf *));
 void softdep_deallocate_dependencies __P((struct buf *));
 void softdep_move_dependencies __P((struct buf *, struct buf *));
-int softdep_count_dependencies __P((struct buf *bp, int));
+int softdep_count_dependencies __P((struct buf *bp, int, int));
 
 struct bio_ops bioops = {
 	softdep_disk_io_initiation,		/* io_start */
@@ -4780,9 +4780,10 @@ clear_inodedeps(p)
  * is set, return number of dependencies, otherwise just yes or no.
  */
 int
-softdep_count_dependencies(bp, wantcount)
+softdep_count_dependencies(bp, wantcount, islocked)
 	struct buf *bp;
 	int wantcount;
+	int islocked;
 {
 	struct worklist *wk;
 	struct inodedep *inodedep;
@@ -4793,7 +4794,8 @@ softdep_count_dependencies(bp, wantcount)
 	int i, retval;
 
 	retval = 0;
-	ACQUIRE_LOCK(&lk);
+	if (!islocked)
+		ACQUIRE_LOCK(&lk);
 	LIST_FOREACH(wk, &bp->b_dep, wk_list) {
 		switch (wk->wk_type) {
 
@@ -4845,14 +4847,16 @@ softdep_count_dependencies(bp, wantcount)
 			continue;
 
 		default:
-			FREE_LOCK(&lk);
+			if (!islocked)
+				FREE_LOCK(&lk);
 			panic("softdep_check_for_rollback: Unexpected type %s",
 			    TYPENAME(wk->wk_type));
 			/* NOTREACHED */
 		}
 	}
 out:
-	FREE_LOCK(&lk);
+	if (!islocked)
+		FREE_LOCK(&lk);
 	return retval;
 }
 
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