From 038c55d50ec75412437c3d89c72b8197e06b8adc Mon Sep 17 00:00:00 2001
From: bp <bp@FreeBSD.org>
Date: Sun, 22 Oct 2000 14:22:17 +0000
Subject: Remove de_lock field from denode structure and make msdosfs
 PDIRUNLOCK aware.

---
 sys/msdosfs/denode.h         |  1 -
 sys/msdosfs/msdosfs_denode.c |  7 ++++---
 sys/msdosfs/msdosfs_lookup.c | 30 ++++++++++++++++++++++--------
 sys/msdosfs/msdosfs_vnops.c  |  2 +-
 4 files changed, 27 insertions(+), 13 deletions(-)

(limited to 'sys/msdosfs')

diff --git a/sys/msdosfs/denode.h b/sys/msdosfs/denode.h
index f57e014..f7ba83b 100644
--- a/sys/msdosfs/denode.h
+++ b/sys/msdosfs/denode.h
@@ -135,7 +135,6 @@ struct fatcache {
  * contained within a vnode.
  */
 struct denode {
-	struct lock de_lock;	/* denode lock >Keep this first< */
 	struct denode *de_next;	/* Hash chain forward */
 	struct denode **de_prev; /* Hash chain back */
 	struct vnode *de_vnode;	/* addr of vnode we are part of */
diff --git a/sys/msdosfs/msdosfs_denode.c b/sys/msdosfs/msdosfs_denode.c
index 0122f6b..37fe667 100644
--- a/sys/msdosfs/msdosfs_denode.c
+++ b/sys/msdosfs/msdosfs_denode.c
@@ -264,7 +264,8 @@ deget(pmp, dirclust, diroffset, depp)
 		return error;
 	}
 	bzero((caddr_t)ldep, sizeof *ldep);
-	lockinit(&ldep->de_lock, PINOD, "denode", 0, 0);
+	lockinit(&nvp->v_lock, PINOD, "denode", 0, 0);
+	nvp->v_vnlock = &nvp->v_lock;
 	nvp->v_data = ldep;
 	ldep->de_vnode = nvp;
 	ldep->de_flag = 0;
@@ -280,7 +281,7 @@ deget(pmp, dirclust, diroffset, depp)
 	 * of at the start of msdosfs_hashins() so that reinsert() can
 	 * call msdosfs_hashins() with a locked denode.
 	 */
-	if (lockmgr(&ldep->de_lock, LK_EXCLUSIVE, (struct mtx *)0, p))
+	if (VOP_LOCK(nvp, LK_EXCLUSIVE, p) != 0)
 		panic("deget: unexpected lock failure");
 
 	/*
@@ -662,7 +663,7 @@ msdosfs_reclaim(ap)
 #if 0 /* XXX */
 	dep->de_flag = 0;
 #endif
-	lockdestroy(&dep->de_lock);
+	lockdestroy(&vp->v_lock);
 	FREE(dep, M_MSDOSFSNODE);
 	vp->v_data = NULL;
 
diff --git a/sys/msdosfs/msdosfs_lookup.c b/sys/msdosfs/msdosfs_lookup.c
index edb71a6..776559d 100644
--- a/sys/msdosfs/msdosfs_lookup.c
+++ b/sys/msdosfs/msdosfs_lookup.c
@@ -116,6 +116,7 @@ msdosfs_lookup(ap)
 	int wincnt = 1;
 	int chksum = -1;
 	int olddos = 1;
+	cnp->cn_flags &= ~PDIRUNLOCK;
 
 #ifdef MSDOSFS_DEBUG
 	printf("msdosfs_lookup(): looking for %s\n", cnp->cn_nameptr);
@@ -363,8 +364,10 @@ notfound:
 		 * information cannot be used.
 		 */
 		cnp->cn_flags |= SAVENAME;
-		if (!lockparent)
+		if (!lockparent) {
 			VOP_UNLOCK(vdp, 0, p);
+			cnp->cn_flags |= PDIRUNLOCK;
+		}
 		return (EJUSTRETURN);
 	}
 	/*
@@ -452,8 +455,10 @@ foundroot:
 		if (error)
 			return (error);
 		*vpp = DETOV(tdp);
-		if (!lockparent)
+		if (!lockparent) {
 			VOP_UNLOCK(vdp, 0, p);
+			cnp->cn_flags |= PDIRUNLOCK;
+		}
 		return (0);
 	}
 
@@ -483,8 +488,10 @@ foundroot:
 			return (error);
 		*vpp = DETOV(tdp);
 		cnp->cn_flags |= SAVENAME;
-		if (!lockparent)
+		if (!lockparent) {
 			VOP_UNLOCK(vdp, 0, p);
+			cnp->cn_flags |= PDIRUNLOCK;
+		}
 		return (0);
 	}
 
@@ -510,15 +517,20 @@ foundroot:
 	pdp = vdp;
 	if (flags & ISDOTDOT) {
 		VOP_UNLOCK(pdp, 0, p);
+		cnp->cn_flags |= PDIRUNLOCK;
 		error = deget(pmp, cluster, blkoff,  &tdp);
 		if (error) {
 			vn_lock(pdp, LK_EXCLUSIVE | LK_RETRY, p); 
+			cnp->cn_flags &= ~PDIRUNLOCK;
 			return (error);
 		}
-		if (lockparent && (flags & ISLASTCN) &&
-		    (error = vn_lock(pdp, LK_EXCLUSIVE, p))) {
-			vput(DETOV(tdp));
-			return (error);
+		if (lockparent && (flags & ISLASTCN)) {
+			error = vn_lock(pdp, LK_EXCLUSIVE, p);
+			if (error) {
+				vput(DETOV(tdp));
+				return (error);
+			}
+			cnp->cn_flags &= ~PDIRUNLOCK;
 		}
 		*vpp = DETOV(tdp);
 	} else if (dp->de_StartCluster == scn && isadir) {
@@ -527,8 +539,10 @@ foundroot:
 	} else {
 		if ((error = deget(pmp, cluster, blkoff, &tdp)) != 0)
 			return (error);
-		if (!lockparent || !(flags & ISLASTCN))
+		if (!lockparent || !(flags & ISLASTCN)) {
 			VOP_UNLOCK(pdp, 0, p);
+			cnp->cn_flags |= PDIRUNLOCK;
+		}
 		*vpp = DETOV(tdp);
 	}
 
diff --git a/sys/msdosfs/msdosfs_vnops.c b/sys/msdosfs/msdosfs_vnops.c
index 37a57ea..48824af 100644
--- a/sys/msdosfs/msdosfs_vnops.c
+++ b/sys/msdosfs/msdosfs_vnops.c
@@ -1830,7 +1830,7 @@ msdosfs_print(ap)
 	    "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
 	       dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
 	printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
-	lockmgr_printinfo(&dep->de_lock);
+	lockmgr_printinfo(&ap->a_vp->v_lock);
 	printf("\n");
 	return (0);
 }
-- 
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