Remove Softdep.

Softdep has been a no-op for some time now, this removes it to get
it out of the way.

Flensing mostly done in Talinn, with some help from krw@

ok deraadt@

10 files changed, 43 insertions, 6887 deletions

diff --git a/sys/ufs/ffs/ffs_alloc.c b/sys/ufs/ffs/ffs_alloc.c
index f25e235bdda..14822193a03 100644
--- a/sys/ufs/ffs/ffs_alloc.c
+++ b/sys/ufs/ffs/ffs_alloc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_alloc.c,v 1.114 2021/03/11 13:31:35 jsg Exp $	*/
+/*	$OpenBSD: ffs_alloc.c,v 1.115 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_alloc.c,v 1.11 1996/05/11 18:27:09 mycroft Exp $	*/
 
 /*
@@ -291,8 +291,7 @@ ffs_realloccg(struct inode *ip, daddr_t lbprev, daddr_t bpref, int osize,
 		goto nospace;
 
 	(void) uvm_vnp_uncache(ITOV(ip));
-	if (!DOINGSOFTDEP(ITOV(ip)))
-		ffs_blkfree(ip, bprev, (long)osize);
+	ffs_blkfree(ip, bprev, (long)osize);
 	if (nsize < request)
 		ffs_blkfree(ip, bno + numfrags(fs, nsize),
 		    (long)(request - nsize));
@@ -921,8 +920,6 @@ ffs_fragextend(struct inode *ip, u_int cg, daddr_t bprev, int osize, int nsize)
 		fs->fs_cs(fs, cg).cs_nffree--;
 	}
 	fs->fs_fmod = 1;
-	if (DOINGSOFTDEP(ITOV(ip)))
-		softdep_setup_blkmapdep(bp, fs, bprev);
 
 	bdwrite(bp);
 	return (bprev);
@@ -1015,8 +1012,6 @@ ffs_alloccg(struct inode *ip, u_int cg, daddr_t bpref, int size)
 		cgp->cg_frsum[allocsiz - frags]++;
 
 	blkno = cgbase(fs, cg) + bno;
-	if (DOINGSOFTDEP(ITOV(ip)))
-		softdep_setup_blkmapdep(bp, fs, blkno);
 	bdwrite(bp);
 	return (blkno);
 }
@@ -1082,9 +1077,6 @@ gotit:
 	fs->fs_fmod = 1;
 	blkno = cgbase(fs, cgp->cg_cgx) + bno;
 
-	if (DOINGSOFTDEP(ITOV(ip)))
-		softdep_setup_blkmapdep(bp, fs, blkno);
-
 	return (blkno);
 }
 
@@ -1220,9 +1212,6 @@ gotit:
         }
 #endif /* FFS2 */
 
-	if (DOINGSOFTDEP(ITOV(ip)))
-		softdep_setup_inomapdep(bp, ip, cg * fs->fs_ipg + ipref);
-
 	setbit(cg_inosused(cgp), ipref);
 
 	/* Update the counters we keep on free inodes */
@@ -1363,13 +1352,6 @@ ffs_blkfree(struct inode *ip, daddr_t bno, long size)
 int
 ffs_inode_free(struct inode *pip, ufsino_t ino, mode_t mode)
 {
-	struct vnode *pvp = ITOV(pip);
-
-	if (DOINGSOFTDEP(pvp)) {
-		softdep_freefile(pvp, ino, mode);
-		return (0);
-	}
-
 	return (ffs_freefile(pip, ino, mode));
 }
 
diff --git a/sys/ufs/ffs/ffs_balloc.c b/sys/ufs/ffs/ffs_balloc.c
index ce94cffc700..47e27348932 100644
--- a/sys/ufs/ffs/ffs_balloc.c
+++ b/sys/ufs/ffs/ffs_balloc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_balloc.c,v 1.45 2019/07/19 00:24:31 cheloha Exp $	*/
+/*	$OpenBSD: ffs_balloc.c,v 1.46 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_balloc.c,v 1.3 1996/02/09 22:22:21 christos Exp $	*/
 
 /*
@@ -107,10 +107,6 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 			    osize, (int)fs->fs_bsize, cred, bpp, &newb);
 			if (error)
 				return (error);
-			if (DOINGSOFTDEP(vp))
-				softdep_setup_allocdirect(ip, nb, newb,
-				    ip->i_ffs1_db[nb], fs->fs_bsize, osize,
-				    bpp ? *bpp : NULL);
 
 			ip->i_ffs1_size = lblktosize(fs, nb + 1);
 			uvm_vnp_setsize(vp, ip->i_ffs1_size);
@@ -179,10 +175,6 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 				    osize, nsize, cred, bpp, &newb);
 				if (error)
 					return (error);
-				if (DOINGSOFTDEP(vp))
-					softdep_setup_allocdirect(ip, lbn,
-					    newb, nb, nsize, osize,
-					    bpp ? *bpp : NULL);
 			}
 		} else {
 			/*
@@ -207,9 +199,6 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 				if (flags & B_CLRBUF)
 					clrbuf(*bpp);
 			}
-			if (DOINGSOFTDEP(vp))
-				softdep_setup_allocdirect(ip, lbn, newb, 0,
-				    nsize, 0, bpp ? *bpp : NULL);
 		}
 		ip->i_ffs1_db[lbn] = newb;
 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
@@ -247,18 +236,12 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 		bp->b_blkno = fsbtodb(fs, nb);
 		clrbuf(bp);
 
-		if (DOINGSOFTDEP(vp)) {
-			softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
-			    newb, 0, fs->fs_bsize, 0, bp);
-			bdwrite(bp);
-		} else {
-			/*
-			 * Write synchronously so that indirect blocks
-			 * never point at garbage.
-			 */
-			if ((error = bwrite(bp)) != 0)
-				goto fail;
-		}
+		/*
+		 * Write synchronously so that indirect blocks
+		 * never point at garbage.
+		 */
+		if ((error = bwrite(bp)) != 0)
+			goto fail;
 		allocib = &ip->i_ffs1_ib[indirs[0].in_off];
 		*allocib = nb;
 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
@@ -296,19 +279,13 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 		nbp->b_blkno = fsbtodb(fs, nb);
 		clrbuf(nbp);
 
-		if (DOINGSOFTDEP(vp)) {
-			softdep_setup_allocindir_meta(nbp, ip, bp,
-			    indirs[i - 1].in_off, nb);
-			bdwrite(nbp);
-		} else {
-			/*
-			 * Write synchronously so that indirect blocks
-			 * never point at garbage.
-			 */
-			if ((error = bwrite(nbp)) != 0) {
-				brelse(bp);
-				goto fail;
-			}
+		/*
+		 * Write synchronously so that indirect blocks
+		 * never point at garbage.
+		 */
+		if ((error = bwrite(nbp)) != 0) {
+			brelse(bp);
+			goto fail;
 		}
 		bap[indirs[i - 1].in_off] = nb;
 		if (allocib == NULL && unwindidx < 0)
@@ -343,9 +320,6 @@ ffs1_balloc(struct inode *ip, off_t startoffset, int size, struct ucred *cred,
 				clrbuf(nbp);
 			*bpp = nbp;
 		}
-		if (DOINGSOFTDEP(vp))
-			softdep_setup_allocindir_page(ip, lbn, bp,
-			    indirs[i].in_off, nb, 0, bpp ? *bpp : NULL);
 		bap[indirs[i].in_off] = nb;
 		/*
 		 * If required, write synchronously, otherwise use
@@ -473,11 +447,6 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 			if (error)
 				return (error);
 
-			if (DOINGSOFTDEP(vp))
-				softdep_setup_allocdirect(ip, nb, newb,
-				    ip->i_ffs2_db[nb], fs->fs_bsize, osize,
-				    bpp ? *bpp : NULL);
-
 			ip->i_ffs2_size = lblktosize(fs, nb + 1);
 			uvm_vnp_setsize(vp, ip->i_ffs2_size);
 			ip->i_ffs2_db[nb] = newb;
@@ -550,11 +519,6 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 				    bpp, &newb);
 				if (error)
 					return (error);
-
-				if (DOINGSOFTDEP(vp))
-					softdep_setup_allocdirect(ip, lbn,
-					    newb, nb, nsize, osize,
-					    bpp ? *bpp : NULL);
 			}
 		} else {
 			/*
@@ -580,10 +544,6 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 					clrbuf(bp);
 				*bpp = bp;
 			}
-
-			if (DOINGSOFTDEP(vp))
-				softdep_setup_allocdirect(ip, lbn, newb, 0,
-				    nsize, 0, bpp ? *bpp : NULL);
 		}
 
 		ip->i_ffs2_db[lbn] = newb;
@@ -626,19 +586,13 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 		bp->b_blkno = fsbtodb(fs, nb);
 		clrbuf(bp);
 
-		if (DOINGSOFTDEP(vp)) {
-			softdep_setup_allocdirect(ip, NDADDR + indirs[0].in_off,
-			    newb, 0, fs->fs_bsize, 0, bp);
-			bdwrite(bp);
-		} else {
-			/*
-			 * Write synchronously so that indirect blocks never
-			 * point at garbage.
-			 */
-			error = bwrite(bp);
-			if (error)
-				goto fail;
-		}
+		/*
+		 * Write synchronously so that indirect blocks never
+		 * point at garbage.
+		 */
+		error = bwrite(bp);
+		if (error)
+			goto fail;
 
 		unwindidx = 0;
 		allocib = &ip->i_ffs2_ib[indirs[0].in_off];
@@ -685,20 +639,14 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 		nbp->b_blkno = fsbtodb(fs, nb);
 		clrbuf(nbp);
 
-		if (DOINGSOFTDEP(vp)) {
-			softdep_setup_allocindir_meta(nbp, ip, bp,
-			    indirs[i - 1].in_off, nb);
-			bdwrite(nbp);
-		} else {
-			/*
-			 * Write synchronously so that indirect blocks never
-			 * point at garbage.
-			 */
-			error = bwrite(nbp);
-			if (error) {
-				brelse(bp);
-				goto fail;
-			}
+		/*
+		 * Write synchronously so that indirect blocks never
+		 * point at garbage.
+		 */
+		error = bwrite(nbp);
+		if (error) {
+			brelse(bp);
+			goto fail;
 		}
 
 		if (unwindidx < 0)
@@ -740,10 +688,6 @@ ffs2_balloc(struct inode *ip, off_t off, int size, struct ucred *cred,
 			*bpp = nbp;
 		}
 
-		if (DOINGSOFTDEP(vp))
-			softdep_setup_allocindir_page(ip, lbn, bp,
-			    indirs[num].in_off, nb, 0, bpp ? *bpp : NULL);
-
 		bap[indirs[num].in_off] = nb;
 
 		if (allocib == NULL && unwindidx < 0)
@@ -830,11 +774,6 @@ fail:
 			}
 		}
 
-		if (DOINGSOFTDEP(vp) && unwindidx == 0) {
-			ip->i_flag |= IN_CHANGE | IN_UPDATE;
-			ffs_update(ip, 1);
-		}
-
 		/*
 		 * Now that any dependencies that we created have been
 		 * resolved, we can undo the partial allocation.
@@ -842,8 +781,6 @@ fail:
 		if (unwindidx == 0) {
 			*allocib = 0;
 			ip->i_flag |= IN_CHANGE | IN_UPDATE;
-			if (DOINGSOFTDEP(vp))
-				ffs_update(ip, 1);
 		} else {
 			r = bread(vp, indirs[unwindidx].in_lbn,
 			    (int)fs->fs_bsize, &bp);
diff --git a/sys/ufs/ffs/ffs_extern.h b/sys/ufs/ffs/ffs_extern.h
index 921f905c1fc..5e365ba030a 100644
--- a/sys/ufs/ffs/ffs_extern.h
+++ b/sys/ufs/ffs/ffs_extern.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_extern.h,v 1.45 2020/01/20 23:21:56 claudio Exp $	*/
+/*	$OpenBSD: ffs_extern.h,v 1.46 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_extern.h,v 1.4 1996/02/09 22:22:22 christos Exp $	*/
 
 /*
@@ -36,7 +36,6 @@
 #define FFS_CLUSTERWRITE	2	/* cluster writing enabled */
 #define FFS_REALLOCBLKS		3	/* block reallocation enabled */
 #define FFS_ASYNCFREE		4	/* asynchronous block freeing enabled */
-#define	FFS_MAX_SOFTDEPS	5	/* maximum structs before slowdown */
 #define	FFS_SD_TICKDELAY	6	/* ticks to pause during slowdown */
 #define	FFS_SD_WORKLIST_PUSH	7	/* # of worklist cleanups */
 #define	FFS_SD_BLK_LIMIT_PUSH	8	/* # of times block limit neared */
@@ -59,7 +58,6 @@
 	{ 0, 0 }, \
 	{ 0, 0 }, \
 	{ 0, 0 }, \
-	{ "max_softdeps", CTLTYPE_INT }, \
 	{ "sd_tickdelay", CTLTYPE_INT }, \
 	{ "sd_worklist_push", CTLTYPE_INT }, \
 	{ "sd_blk_limit_push", CTLTYPE_INT }, \
@@ -167,28 +165,6 @@ int ffsfifo_reclaim(void *);
 struct vop_vfree_args;
 struct vop_fsync_args;
 
-void  softdep_initialize(void);
-int   softdep_process_worklist(struct mount *);
-int   softdep_mount(struct vnode *, struct mount *, struct fs *,
-          struct ucred *);
-int   softdep_flushworklist(struct mount *, int *, struct proc *);
-int   softdep_flushfiles(struct mount *, int, struct proc *);
-void  softdep_update_inodeblock(struct inode *, struct buf *, int);
-void  softdep_load_inodeblock(struct inode *);
-void  softdep_freefile(struct vnode *, ufsino_t, mode_t);
-void  softdep_setup_freeblocks(struct inode *, off_t);
-void  softdep_setup_inomapdep(struct buf *, struct inode *, ufsino_t);
-void  softdep_setup_blkmapdep(struct buf *, struct fs *, daddr_t);
-void  softdep_setup_allocdirect(struct inode *, daddr_t, daddr_t,
-            daddr_t, long, long, struct buf *);
-void  softdep_setup_allocindir_meta(struct buf *, struct inode *,
-            struct buf *, int, daddr_t);
-void  softdep_setup_allocindir_page(struct inode *, daddr_t,
-            struct buf *, int, daddr_t, daddr_t, struct buf *);
-void  softdep_fsync_mountdev(struct vnode *, int);
-int   softdep_sync_metadata(struct vop_fsync_args *);
-int   softdep_fsync(struct vnode *);
-
 extern struct pool ffs_ino_pool;	/* memory pool for inodes */
 extern struct pool ffs_dinode1_pool;	/* memory pool for UFS1 dinodes */
 #ifdef FFS2
diff --git a/sys/ufs/ffs/ffs_inode.c b/sys/ufs/ffs/ffs_inode.c
index 79f7c188dbe..f753515eda1 100644
--- a/sys/ufs/ffs/ffs_inode.c
+++ b/sys/ufs/ffs/ffs_inode.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_inode.c,v 1.82 2024/01/09 03:15:59 guenther Exp $	*/
+/*	$OpenBSD: ffs_inode.c,v 1.83 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_inode.c,v 1.10 1996/05/11 18:27:19 mycroft Exp $	*/
 
 /*
@@ -95,9 +95,7 @@ ffs_update(struct inode *ip, int waitfor)
 		return (error);
 	}
 
-	if (DOINGSOFTDEP(vp))
-		softdep_update_inodeblock(ip, bp, waitfor);
-	else if (ip->i_effnlink != DIP(ip, nlink))
+	if (ip->i_effnlink != DIP(ip, nlink))
 		panic("ffs_update: bad link cnt");
 
 #ifdef FFS2
@@ -174,30 +172,6 @@ ffs_truncate(struct inode *oip, off_t length, int flags, struct ucred *cred)
 	oip->i_ci.ci_lasta = oip->i_ci.ci_clen 
 	    = oip->i_ci.ci_cstart = oip->i_ci.ci_lastw = 0;
 
-	if (DOINGSOFTDEP(ovp)) {
-		if (length > 0 || softdep_slowdown(ovp)) {
-			/*
-			 * If a file is only partially truncated, then
-			 * we have to clean up the data structures
-			 * describing the allocation past the truncation
-			 * point. Finding and deallocating those structures
-			 * is a lot of work. Since partial truncation occurs
-			 * rarely, we solve the problem by syncing the file
-			 * so that it will have no data structures left.
-			 */
-			if ((error = VOP_FSYNC(ovp, cred, MNT_WAIT,
-					       curproc)) != 0)
-				return (error);
-		} else {
-			(void)ufs_quota_free_blocks(oip, DIP(oip, blocks),
-			    NOCRED);
-			softdep_setup_freeblocks(oip, length);
-			vinvalbuf(ovp, 0, cred, curproc, 0, INFSLP);
-			oip->i_flag |= IN_CHANGE | IN_UPDATE;
-			return (UFS_UPDATE(oip, 0));
-		}
-	}
-
 	osize = DIP(oip, size);
 	/*
 	 * Lengthen the size of the file. We must ensure that the
@@ -244,18 +218,6 @@ ffs_truncate(struct inode *oip, off_t length, int flags, struct ucred *cred)
 				   cred, aflags, &bp);
 		if (error)
 			return (error);
-		/*
-		 * When we are doing soft updates and the UFS_BALLOC
-		 * above fills in a direct block hole with a full sized
-		 * block that will be truncated down to a fragment below,
-		 * we must flush out the block dependency with an FSYNC
-		 * so that we do not get a soft updates inconsistency
-		 * when we create the fragment below.
-		 */
-		if (DOINGSOFTDEP(ovp) && lbn < NDADDR &&
-		    fragroundup(fs, blkoff(fs, length)) < fs->fs_bsize &&
-		    (error = VOP_FSYNC(ovp, cred, MNT_WAIT, curproc)) != 0)
-			return (error);
 		DIP_ASSIGN(oip, size, length);
 		size = blksize(fs, oip, lbn);
 		(void) uvm_vnp_uncache(ovp);
diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
index e4d56ebc42b..e69de29bb2d 100644
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -1,5766 +0,0 @@
-/*	$OpenBSD: ffs_softdep.c,v 1.152 2023/07/05 15:13:28 beck Exp $	*/
-
-/*
- * Copyright 1998, 2000 Marshall Kirk McKusick. All Rights Reserved.
- *
- * The soft updates code is derived from the appendix of a University
- * of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
- * "Soft Updates: A Solution to the Metadata Update Problem in File
- * Systems", CSE-TR-254-95, August 1995).
- *
- * Further information about soft updates can be obtained from:
- *
- *	Marshall Kirk McKusick		http://www.mckusick.com/softdep/
- *	1614 Oxford Street		mckusick@mckusick.com
- *	Berkeley, CA 94709-1608		+1-510-843-9542
- *	USA
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	from: @(#)ffs_softdep.c	9.59 (McKusick) 6/21/00
- * $FreeBSD: src/sys/ufs/ffs/ffs_softdep.c,v 1.86 2001/02/04 16:08:18 phk Exp $
- */
-
-#include <sys/param.h>
-#include <sys/buf.h>
-#include <sys/kernel.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/proc.h>
-#include <sys/pool.h>
-#include <sys/syslog.h>
-#include <sys/systm.h>
-#include <sys/vnode.h>
-#include <sys/specdev.h>
-#include <crypto/siphash.h>
-#include <ufs/ufs/dir.h>
-#include <ufs/ufs/quota.h>
-#include <ufs/ufs/inode.h>
-#include <ufs/ufs/ufsmount.h>
-#include <ufs/ffs/fs.h>
-#include <ufs/ffs/softdep.h>
-#include <ufs/ffs/ffs_extern.h>
-#include <ufs/ufs/ufs_extern.h>
-
-#define STATIC
-
-/*
- * Mapping of dependency structure types to malloc types.
- */
-#define	D_PAGEDEP	0
-#define	D_INODEDEP	1
-#define	D_NEWBLK	2
-#define	D_BMSAFEMAP	3
-#define	D_ALLOCDIRECT	4
-#define	D_INDIRDEP	5
-#define	D_ALLOCINDIR	6
-#define	D_FREEFRAG	7
-#define	D_FREEBLKS	8
-#define	D_FREEFILE	9
-#define	D_DIRADD	10
-#define	D_MKDIR		11
-#define	D_DIRREM	12
-#define	D_NEWDIRBLK	13
-#define	D_LAST		13
-/*
- * Names of softdep types.
- */
-const char *softdep_typenames[] = {
-	"pagedep",
-	"inodedep",
-	"newblk",
-	"bmsafemap",
-	"allocdirect",
-	"indirdep",
-	"allocindir",
-	"freefrag",
-	"freeblks",
-	"freefile",
-	"diradd",
-	"mkdir",
-	"dirrem",
-	"newdirblk",
-};
-#define	TYPENAME(type) \
-	((unsigned)(type) <= D_LAST ? softdep_typenames[type] : "???")
-/*
- * Finding the current process.
- */
-#define CURPROC curproc
-/*
- * End system adaptation definitions.
- */
-
-/*
- * Internal function prototypes.
- */
-STATIC	void softdep_error(char *, int);
-STATIC	void drain_output(struct vnode *, int);
-STATIC	int getdirtybuf(struct buf *, int);
-STATIC	void clear_remove(struct proc *);
-STATIC	void clear_inodedeps(struct proc *);
-STATIC	int flush_pagedep_deps(struct vnode *, struct mount *,
-	    struct diraddhd *);
-STATIC	int flush_inodedep_deps(struct fs *, ufsino_t);
-STATIC	int handle_written_filepage(struct pagedep *, struct buf *);
-STATIC  void diradd_inode_written(struct diradd *, struct inodedep *);
-STATIC	int handle_written_inodeblock(struct inodedep *, struct buf *);
-STATIC	void handle_allocdirect_partdone(struct allocdirect *);
-STATIC	void handle_allocindir_partdone(struct allocindir *);
-STATIC	void initiate_write_filepage(struct pagedep *, struct buf *);
-STATIC	void handle_written_mkdir(struct mkdir *, int);
-STATIC	void initiate_write_inodeblock_ufs1(struct inodedep *, struct buf *);
-#ifdef FFS2
-STATIC	void initiate_write_inodeblock_ufs2(struct inodedep *, struct buf *);
-#endif
-STATIC	void handle_workitem_freefile(struct freefile *);
-STATIC	void handle_workitem_remove(struct dirrem *);
-STATIC	struct dirrem *newdirrem(struct buf *, struct inode *,
-	    struct inode *, int, struct dirrem **);
-STATIC	void free_diradd(struct diradd *);
-STATIC	void free_allocindir(struct allocindir *, struct inodedep *);
-STATIC	void free_newdirblk(struct newdirblk *);
-STATIC	int indir_trunc(struct inode *, daddr_t, int, daddr_t, long *);
-STATIC	void deallocate_dependencies(struct buf *, struct inodedep *);
-STATIC	void free_allocdirect(struct allocdirectlst *,
-	    struct allocdirect *, int);
-STATIC	int check_inode_unwritten(struct inodedep *);
-STATIC	int free_inodedep(struct inodedep *);
-STATIC	void handle_workitem_freeblocks(struct freeblks *);
-STATIC	void merge_inode_lists(struct inodedep *);
-STATIC	void setup_allocindir_phase2(struct buf *, struct inode *,
-	    struct allocindir *);
-STATIC	struct allocindir *newallocindir(struct inode *, int, daddr_t,
-	    daddr_t);
-STATIC	void handle_workitem_freefrag(struct freefrag *);
-STATIC	struct freefrag *newfreefrag(struct inode *, daddr_t, long);
-STATIC	void allocdirect_merge(struct allocdirectlst *,
-	    struct allocdirect *, struct allocdirect *);
-STATIC	struct bmsafemap *bmsafemap_lookup(struct buf *);
-STATIC	int newblk_lookup(struct fs *, daddr_t, int,
-	    struct newblk **);
-STATIC	int inodedep_lookup(struct fs *, ufsino_t, int, struct inodedep **);
-STATIC	int pagedep_lookup(struct inode *, daddr_t, int, struct pagedep **);
-STATIC	void pause_timer(void *);
-STATIC	int request_cleanup(int, int);
-STATIC	int process_worklist_item(struct mount *, int *, int);
-STATIC	void add_to_worklist(struct worklist *);
-
-/*
- * Exported softdep operations.
- */
-void softdep_disk_io_initiation(struct buf *);
-void softdep_disk_write_complete(struct buf *);
-void softdep_deallocate_dependencies(struct buf *);
-void softdep_move_dependencies(struct buf *, struct buf *);
-int softdep_count_dependencies(struct buf *bp, int, int);
-
-/*
- * Locking primitives.
- *
- * For a uniprocessor, all we need to do is protect against disk
- * interrupts. For a multiprocessor, this lock would have to be
- * a mutex. A single mutex is used throughout this file, though
- * finer grain locking could be used if contention warranted it.
- *
- * For a multiprocessor, the sleep call would accept a lock and
- * release it after the sleep processing was complete. In a uniprocessor
- * implementation there is no such interlock, so we simple mark
- * the places where it needs to be done with the `interlocked' form
- * of the lock calls. Since the uniprocessor sleep already interlocks
- * the spl, there is nothing that really needs to be done.
- */
-#ifndef /* NOT */ DEBUG
-STATIC struct lockit {
-	int	lkt_spl;
-} lk = { 0 };
-#define ACQUIRE_LOCK(lk)		(lk)->lkt_spl = splbio()
-#define FREE_LOCK(lk)			splx((lk)->lkt_spl)
-#define ACQUIRE_LOCK_INTERLOCKED(lk,s)	(lk)->lkt_spl = (s)
-#define FREE_LOCK_INTERLOCKED(lk)	((lk)->lkt_spl)
-
-#else /* DEBUG */
-STATIC struct lockit {
-	int	lkt_spl;
-	pid_t	lkt_held;
-	int     lkt_line;
-} lk = { 0, -1 };
-STATIC int lockcnt;
-
-STATIC	void acquire_lock(struct lockit *, int);
-STATIC	void free_lock(struct lockit *, int);
-STATIC	void acquire_lock_interlocked(struct lockit *, int, int);
-STATIC	int free_lock_interlocked(struct lockit *, int);
-
-#define ACQUIRE_LOCK(lk)		acquire_lock(lk, __LINE__)
-#define FREE_LOCK(lk)			free_lock(lk, __LINE__)
-#define ACQUIRE_LOCK_INTERLOCKED(lk,s)	acquire_lock_interlocked(lk, (s), __LINE__)
-#define FREE_LOCK_INTERLOCKED(lk)	free_lock_interlocked(lk, __LINE__)
-
-STATIC void
-acquire_lock(struct lockit *lk, int line)
-{
-	pid_t holder;
-	int original_line;
-
-	if (lk->lkt_held != -1) {
-		holder = lk->lkt_held;
-		original_line = lk->lkt_line;
-		FREE_LOCK(lk);
-		if (holder == CURPROC->p_tid)
-			panic("softdep_lock: locking against myself, acquired at line %d, relocked at line %d", original_line, line);
-		else
-			panic("softdep_lock: lock held by %d, acquired at line %d, relocked at line %d", holder, original_line, line);
-	}
-	lk->lkt_spl = splbio();
-	lk->lkt_held = CURPROC->p_tid;
-	lk->lkt_line = line;
-	lockcnt++;
-}
-
-STATIC void
-free_lock(struct lockit *lk, int line)
-{
-
-	if (lk->lkt_held == -1)
-		panic("softdep_unlock: lock not held at line %d", line);
-	lk->lkt_held = -1;
-	splx(lk->lkt_spl);
-}
-
-STATIC void
-acquire_lock_interlocked(struct lockit *lk, int s, int line)
-{
-	pid_t holder;
-	int original_line;
-
-	if (lk->lkt_held != -1) {
-		holder = lk->lkt_held;
-		original_line = lk->lkt_line;
-		FREE_LOCK_INTERLOCKED(lk);
-		if (holder == CURPROC->p_tid)
-			panic("softdep_lock: locking against myself, acquired at line %d, relocked at line %d", original_line, line);
-		else
-			panic("softdep_lock: lock held by %d, acquired at line %d, relocked at line %d", holder, original_line, line);
-	}
-	lk->lkt_held = CURPROC->p_tid;
-	lk->lkt_line = line;
-	lk->lkt_spl = s;
-	lockcnt++;
-}
-
-STATIC int
-free_lock_interlocked(struct lockit *lk, int line)
-{
-
-	if (lk->lkt_held == -1)
-		panic("softdep_unlock_interlocked: lock not held at line %d", line);
-	lk->lkt_held = -1;
-
-	return (lk->lkt_spl);
-}
-#endif /* DEBUG */
-
-/*
- * Place holder for real semaphores.
- */
-struct sema {
-	int	value;
-	pid_t	holder;
-	char	*name;
-	int	prio;
-};
-STATIC	void sema_init(struct sema *, char *, int);
-STATIC	int sema_get(struct sema *, struct lockit *);
-STATIC	void sema_release(struct sema *);
-
-STATIC void
-sema_init(struct sema *semap, char *name, int prio)
-{
-
-	semap->holder = -1;
-	semap->value = 0;
-	semap->name = name;
-	semap->prio = prio;
-}
-
-STATIC int
-sema_get(struct sema *semap, struct lockit *interlock)
-{
-	int s;
-
-	if (semap->value++ > 0) {
-		if (interlock != NULL)
-			s = FREE_LOCK_INTERLOCKED(interlock);
-		tsleep_nsec(semap, semap->prio, semap->name, INFSLP);
-		if (interlock != NULL) {
-			ACQUIRE_LOCK_INTERLOCKED(interlock, s);
-			FREE_LOCK(interlock);
-		}
-		return (0);
-	}
-	semap->holder = CURPROC->p_tid;
-	if (interlock != NULL)
-		FREE_LOCK(interlock);
-	return (1);
-}
-
-STATIC void
-sema_release(struct sema *semap)
-{
-
-	if (semap->value <= 0 || semap->holder != CURPROC->p_tid) {
-#ifdef DEBUG
-		if (lk.lkt_held != -1)
-			FREE_LOCK(&lk);
-#endif
-		panic("sema_release: not held");
-	}
-	if (--semap->value > 0) {
-		semap->value = 0;
-		wakeup(semap);
-	}
-	semap->holder = -1;
-}
-
-/*
- * Memory management.
- */
-STATIC struct pool pagedep_pool;
-STATIC struct pool inodedep_pool;
-STATIC struct pool newblk_pool;
-STATIC struct pool bmsafemap_pool;
-STATIC struct pool allocdirect_pool;
-STATIC struct pool indirdep_pool;
-STATIC struct pool allocindir_pool;
-STATIC struct pool freefrag_pool;
-STATIC struct pool freeblks_pool;
-STATIC struct pool freefile_pool;
-STATIC struct pool diradd_pool;
-STATIC struct pool mkdir_pool;
-STATIC struct pool dirrem_pool;
-STATIC struct pool newdirblk_pool;
-
-static __inline void
-softdep_free(struct worklist *item, int type)
-{
-
-	switch (type) {
-	case D_PAGEDEP:
-		pool_put(&pagedep_pool, item);
-		break;
-
-	case D_INODEDEP:
-		pool_put(&inodedep_pool, item);
-		break;
-
-	case D_BMSAFEMAP:
-		pool_put(&bmsafemap_pool, item);
-		break;
-
-	case D_ALLOCDIRECT:
-		pool_put(&allocdirect_pool, item);
-		break;
-
-	case D_INDIRDEP:
-		pool_put(&indirdep_pool, item);
-		break;
-
-	case D_ALLOCINDIR:
-		pool_put(&allocindir_pool, item);
-		break;
-
-	case D_FREEFRAG:
-		pool_put(&freefrag_pool, item);
-		break;
-
-	case D_FREEBLKS:
-		pool_put(&freeblks_pool, item);
-		break;
-
-	case D_FREEFILE:
-		pool_put(&freefile_pool, item);
-		break;
-
-	case D_DIRADD:
-		pool_put(&diradd_pool, item);
-		break;
-
-	case D_MKDIR:
-		pool_put(&mkdir_pool, item);
-		break;
-
-	case D_DIRREM:
-		pool_put(&dirrem_pool, item);
-		break;
-
-	case D_NEWDIRBLK:
-		pool_put(&newdirblk_pool, item);
-		break;
-
-	default:
-#ifdef DEBUG
-		if (lk.lkt_held != -1)
-			FREE_LOCK(&lk);
-#endif
-		panic("softdep_free: unknown type %d", type);
-	}
-}
-
-struct workhead softdep_freequeue;
-
-static __inline void
-softdep_freequeue_add(struct worklist *item)
-{
-	int s;
-
-	s = splbio();
-	LIST_INSERT_HEAD(&softdep_freequeue, item, wk_list);
-	splx(s);
-}
-
-static __inline void
-softdep_freequeue_process(void)
-{
-	struct worklist *wk;
-
-	splassert(IPL_BIO);
-
-	while ((wk = LIST_FIRST(&softdep_freequeue)) != NULL) {
-		LIST_REMOVE(wk, wk_list);
-		FREE_LOCK(&lk);
-		softdep_free(wk, wk->wk_type);
-		ACQUIRE_LOCK(&lk);
-	}
-}
-
-/*
- * Worklist queue management.
- * These routines require that the lock be held.
- */
-#ifndef /* NOT */ DEBUG
-#define WORKLIST_INSERT(head, item) do {	\
-	(item)->wk_state |= ONWORKLIST;		\
-	LIST_INSERT_HEAD(head, item, wk_list);	\
-} while (0)
-#define WORKLIST_REMOVE(item) do {		\
-	(item)->wk_state &= ~ONWORKLIST;	\
-	LIST_REMOVE(item, wk_list);		\
-} while (0)
-#define WORKITEM_FREE(item, type) softdep_freequeue_add((struct worklist *)item)
-
-#else /* DEBUG */
-STATIC	void worklist_insert(struct workhead *, struct worklist *);
-STATIC	void worklist_remove(struct worklist *);
-STATIC	void workitem_free(struct worklist *);
-
-#define WORKLIST_INSERT(head, item) worklist_insert(head, item)
-#define WORKLIST_REMOVE(item) worklist_remove(item)
-#define WORKITEM_FREE(item, type) workitem_free((struct worklist *)item)
-
-STATIC void
-worklist_insert(struct workhead *head, struct worklist *item)
-{
-
-	if (lk.lkt_held == -1)
-		panic("worklist_insert: lock not held");
-	if (item->wk_state & ONWORKLIST) {
-		FREE_LOCK(&lk);
-		panic("worklist_insert: already on list");
-	}
-	item->wk_state |= ONWORKLIST;
-	LIST_INSERT_HEAD(head, item, wk_list);
-}
-
-STATIC void
-worklist_remove(struct worklist *item)
-{
-
-	if (lk.lkt_held == -1)
-		panic("worklist_remove: lock not held");
-	if ((item->wk_state & ONWORKLIST) == 0) {
-		FREE_LOCK(&lk);
-		panic("worklist_remove: not on list");
-	}
-	item->wk_state &= ~ONWORKLIST;
-	LIST_REMOVE(item, wk_list);
-}
-
-STATIC void
-workitem_free(struct worklist *item)
-{
-
-	if (item->wk_state & ONWORKLIST) {
-		if (lk.lkt_held != -1)
-			FREE_LOCK(&lk);
-		panic("workitem_free: still on list");
-	}
-	softdep_freequeue_add(item);
-}
-#endif /* DEBUG */
-
-/*
- * Workitem queue management
- */
-STATIC struct workhead softdep_workitem_pending;
-STATIC struct worklist *worklist_tail;
-STATIC int num_on_worklist;	/* number of worklist items to be processed */
-STATIC int softdep_worklist_busy; /* 1 => trying to do unmount */
-STATIC int softdep_worklist_req; /* serialized waiters */
-STATIC int max_softdeps;	/* maximum number of structs before slowdown */
-STATIC int tickdelay = 2;	/* number of ticks to pause during slowdown */
-STATIC int proc_waiting;	/* tracks whether we have a timeout posted */
-STATIC int *stat_countp;	/* statistic to count in proc_waiting timeout */
-STATIC struct timeout proc_waiting_timeout; 
-STATIC struct proc *filesys_syncer; /* proc of filesystem syncer process */
-STATIC int req_clear_inodedeps;	/* syncer process flush some inodedeps */
-#define FLUSH_INODES	1
-STATIC int req_clear_remove;	/* syncer process flush some freeblks */
-#define FLUSH_REMOVE	2
-/*
- * runtime statistics
- */
-STATIC int stat_worklist_push;	/* number of worklist cleanups */
-STATIC int stat_blk_limit_push;	/* number of times block limit neared */
-STATIC int stat_ino_limit_push;	/* number of times inode limit neared */
-STATIC int stat_blk_limit_hit;	/* number of times block slowdown imposed */
-STATIC int stat_ino_limit_hit;	/* number of times inode slowdown imposed */
-STATIC int stat_sync_limit_hit;	/* number of synchronous slowdowns imposed */
-STATIC int stat_indir_blk_ptrs;	/* bufs redirtied as indir ptrs not written */
-STATIC int stat_inode_bitmap;	/* bufs redirtied as inode bitmap not written */
-STATIC int stat_direct_blk_ptrs;/* bufs redirtied as direct ptrs not written */
-STATIC int stat_dir_entry;	/* bufs redirtied as dir entry cannot write */
-
-/*
- * Add an item to the end of the work queue.
- * This routine requires that the lock be held.
- * This is the only routine that adds items to the list.
- * The following routine is the only one that removes items
- * and does so in order from first to last.
- */
-STATIC void
-add_to_worklist(struct worklist *wk)
-{
-
-	if (wk->wk_state & ONWORKLIST) {
-#ifdef DEBUG
-		if (lk.lkt_held != -1)
-			FREE_LOCK(&lk);
-#endif
-		panic("add_to_worklist: already on list");
-	}
-	wk->wk_state |= ONWORKLIST;
-	if (LIST_FIRST(&softdep_workitem_pending) == NULL)
-		LIST_INSERT_HEAD(&softdep_workitem_pending, wk, wk_list);
-	else
-		LIST_INSERT_AFTER(worklist_tail, wk, wk_list);
-	worklist_tail = wk;
-	num_on_worklist += 1;
-}
-
-/*
- * Process that runs once per second to handle items in the background queue.
- *
- * Note that we ensure that everything is done in the order in which they
- * appear in the queue. The code below depends on this property to ensure
- * that blocks of a file are freed before the inode itself is freed. This
- * ordering ensures that no new <vfsid, inum, lbn> triples will be generated
- * until all the old ones have been purged from the dependency lists.
- */
-int 
-softdep_process_worklist(struct mount *matchmnt)
-{
-	struct proc *p = CURPROC;
-	int matchcnt, loopcount;
-	struct timeval starttime;
-
-	/*
-	 * First process any items on the delayed-free queue.
-	 */
-	ACQUIRE_LOCK(&lk);
-	softdep_freequeue_process();
-	FREE_LOCK(&lk);
-
-	/*
-	 * Record the process identifier of our caller so that we can give
-	 * this process preferential treatment in request_cleanup below.
-	 * We can't do this in softdep_initialize, because the syncer doesn't
-	 * have to run then.
-	 * NOTE! This function _could_ be called with a curproc != syncerproc.
-	 */
-	filesys_syncer = syncerproc;
-	matchcnt = 0;
-
-	/*
-	 * There is no danger of having multiple processes run this
-	 * code, but we have to single-thread it when softdep_flushfiles()
-	 * is in operation to get an accurate count of the number of items
-	 * related to its mount point that are in the list.
-	 */
-	if (matchmnt == NULL) {
-		if (softdep_worklist_busy < 0)
-			return(-1);
-		softdep_worklist_busy += 1;
-	}
-
-	/*
-	 * If requested, try removing inode or removal dependencies.
-	 */
-	if (req_clear_inodedeps) {
-		clear_inodedeps(p);
-		req_clear_inodedeps -= 1;
-		wakeup_one(&proc_waiting);
-	}
-	if (req_clear_remove) {
-		clear_remove(p);
-		req_clear_remove -= 1;
-		wakeup_one(&proc_waiting);
-	}
-	loopcount = 1;
-	getmicrouptime(&starttime);
-	while (num_on_worklist > 0) {
-		if (process_worklist_item(matchmnt, &matchcnt, LK_NOWAIT) == 0)
-			break;
-
-		/*
-		 * If a umount operation wants to run the worklist
-		 * accurately, abort.
-		 */
-		if (softdep_worklist_req && matchmnt == NULL) {
-			matchcnt = -1;
-			break;
-		}
-
-		/*
-		 * If requested, try removing inode or removal dependencies.
-		 */
-		if (req_clear_inodedeps) {
-			clear_inodedeps(p);
-			req_clear_inodedeps -= 1;
-			wakeup_one(&proc_waiting);
-		}
-		if (req_clear_remove) {
-			clear_remove(p);
-			req_clear_remove -= 1;
-			wakeup_one(&proc_waiting);
-		}
-		/*
-		 * We do not generally want to stop for buffer space, but if
-		 * we are really being a buffer hog, we will stop and wait.
-		 */
-#if 0
-		if (loopcount++ % 128 == 0)
-			bwillwrite();
-#endif
-		/*
-		 * Never allow processing to run for more than one
-		 * second. Otherwise the other syncer tasks may get
-		 * excessively backlogged.
-		 */
-		{
-			struct timeval diff;
-			struct timeval tv;
-
-			getmicrouptime(&tv);
-			timersub(&tv, &starttime, &diff);
-			if (diff.tv_sec != 0 && matchmnt == NULL) {
-				matchcnt = -1;
-				break;
-			}
-		}
-
-		/*
-		 * Process any new items on the delayed-free queue.
-		 */
-		ACQUIRE_LOCK(&lk);
-		softdep_freequeue_process();
-		FREE_LOCK(&lk);
-	}
-	if (matchmnt == NULL) {
-		softdep_worklist_busy -= 1;
-		if (softdep_worklist_req && softdep_worklist_busy == 0)
-			wakeup(&softdep_worklist_req);
-	}
-	return (matchcnt);
-}
-
-/*
- * Process one item on the worklist.
- */
-STATIC int
-process_worklist_item(struct mount *matchmnt, int *matchcnt, int flags)
-{
-	struct worklist *wk, *wkend;
-	struct dirrem *dirrem;
-	struct mount *mp;
-	struct vnode *vp;
-
-	ACQUIRE_LOCK(&lk);
-	/*
-	 * Normally we just process each item on the worklist in order.
-	 * However, if we are in a situation where we cannot lock any
-	 * inodes, we have to skip over any dirrem requests whose
-	 * vnodes are resident and locked.
-	 */
-	LIST_FOREACH(wk, &softdep_workitem_pending, wk_list) {
-		if ((flags & LK_NOWAIT) == 0 || wk->wk_type != D_DIRREM)
-			break;
-		dirrem = WK_DIRREM(wk);
-		vp = ufs_ihashlookup(VFSTOUFS(dirrem->dm_mnt)->um_dev,
-		    dirrem->dm_oldinum);
-		if (vp == NULL || !VOP_ISLOCKED(vp))
-			break;
-	}
-	if (wk == NULL) {
-		FREE_LOCK(&lk);
-		return (0);
-	}
-	/*
-	 * Remove the item to be processed. If we are removing the last
-	 * item on the list, we need to recalculate the tail pointer.
-	 * As this happens rarely and usually when the list is short,
-	 * we just run down the list to find it rather than tracking it
-	 * in the above loop.
-	 */
-	WORKLIST_REMOVE(wk);
-	if (wk == worklist_tail) {
-		LIST_FOREACH(wkend, &softdep_workitem_pending, wk_list)
-			if (LIST_NEXT(wkend, wk_list) == NULL)
-				break;
-		worklist_tail = wkend;
-	}
-	num_on_worklist -= 1;
-	FREE_LOCK(&lk);
-	switch (wk->wk_type) {
-
-	case D_DIRREM:
-		/* removal of a directory entry */
-		mp = WK_DIRREM(wk)->dm_mnt;
-#if 0
-		if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
-			panic("%s: dirrem on suspended filesystem",
-				"process_worklist_item");
-#endif
-		if (matchmnt != NULL && mp == matchmnt)
-			*matchcnt += 1;
-		handle_workitem_remove(WK_DIRREM(wk));
-		break;
-
-	case D_FREEBLKS:
-		/* releasing blocks and/or fragments from a file */
-		mp = WK_FREEBLKS(wk)->fb_mnt;
-#if 0
-		if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
-			panic("%s: freeblks on suspended filesystem",
-				"process_worklist_item");
-#endif
-		if (matchmnt != NULL && mp == matchmnt)
-			*matchcnt += 1;
-		handle_workitem_freeblocks(WK_FREEBLKS(wk));
-		break;
-
-	case D_FREEFRAG:
-		/* releasing a fragment when replaced as a file grows */
-		mp = WK_FREEFRAG(wk)->ff_mnt;
-#if 0
-		if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
-			panic("%s: freefrag on suspended filesystem",
-				"process_worklist_item");
-#endif
-		if (matchmnt != NULL && mp == matchmnt)
-			*matchcnt += 1;
-		handle_workitem_freefrag(WK_FREEFRAG(wk));
-		break;
-
-	case D_FREEFILE:
-		/* releasing an inode when its link count drops to 0 */
-		mp = WK_FREEFILE(wk)->fx_mnt;
-#if 0
-		if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
-			panic("%s: freefile on suspended filesystem",
-				"process_worklist_item");
-#endif
-		if (matchmnt != NULL && mp == matchmnt)
-			*matchcnt += 1;
-		handle_workitem_freefile(WK_FREEFILE(wk));
-		break;
-
-	default:
-		panic("%s_process_worklist: Unknown type %s",
-		    "softdep", TYPENAME(wk->wk_type));
-		/* NOTREACHED */
-	}
-	return (1);
-}
-
-/*
- * Move dependencies from one buffer to another.
- */
-void
-softdep_move_dependencies(struct buf *oldbp, struct buf *newbp)
-{
-	struct worklist *wk, *wktail;
-
-	if (LIST_FIRST(&newbp->b_dep) != NULL)
-		panic("softdep_move_dependencies: need merge code");
-	wktail = NULL;
-	ACQUIRE_LOCK(&lk);
-	while ((wk = LIST_FIRST(&oldbp->b_dep)) != NULL) {
-		LIST_REMOVE(wk, wk_list);
-		if (wktail == NULL)
-			LIST_INSERT_HEAD(&newbp->b_dep, wk, wk_list);
-		else
-			LIST_INSERT_AFTER(wktail, wk, wk_list);
-		wktail = wk;
-	}
-	FREE_LOCK(&lk);
-}
-
-/*
- * Purge the work list of all items associated with a particular mount point.
- */
-int
-softdep_flushworklist(struct mount *oldmnt, int *countp, struct proc *p)
-{
-	struct vnode *devvp;
-	int count, error = 0;
-
-	/*
-	 * Await our turn to clear out the queue, then serialize access.
-	 */
-	while (softdep_worklist_busy) {
-		softdep_worklist_req += 1;
-		tsleep_nsec(&softdep_worklist_req, PRIBIO, "softflush", INFSLP);
-		softdep_worklist_req -= 1;
-	}
-	softdep_worklist_busy = -1;
-	/*
-	 * Alternately flush the block device associated with the mount
-	 * point and process any dependencies that the flushing
-	 * creates. We continue until no more worklist dependencies
-	 * are found.
-	 */
-	*countp = 0;
-	devvp = VFSTOUFS(oldmnt)->um_devvp;
-	while ((count = softdep_process_worklist(oldmnt)) > 0) {
-		*countp += count;
-		vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
-		error = VOP_FSYNC(devvp, p->p_ucred, MNT_WAIT, p);
-		VOP_UNLOCK(devvp);
-		if (error)
-			break;
-	}
-	softdep_worklist_busy = 0;
-	if (softdep_worklist_req)
-		wakeup(&softdep_worklist_req);
-	return (error);
-}
-
-/*
- * Flush all vnodes and worklist items associated with a specified mount point.
- */
-int
-softdep_flushfiles(struct mount *oldmnt, int flags, struct proc *p)
-{
-	int error, count, loopcnt;
-
-	/*
-	 * Alternately flush the vnodes associated with the mount
-	 * point and process any dependencies that the flushing
-	 * creates. In theory, this loop can happen at most twice,
-	 * but we give it a few extra just to be sure.
-	 */
-	for (loopcnt = 10; loopcnt > 0; loopcnt--) {
-		/*
-		 * Do another flush in case any vnodes were brought in
-		 * as part of the cleanup operations.
-		 */
-		if ((error = ffs_flushfiles(oldmnt, flags, p)) != 0)
-			break;
-		if ((error = softdep_flushworklist(oldmnt, &count, p)) != 0 ||
-		    count == 0)
-			break;
-	}
-	/*
-	 * If the reboot process sleeps during the loop, the update
-	 * process may call softdep_process_worklist() and create
-	 * new dirty vnodes at the mount point.  Call ffs_flushfiles()
-	 * again after the loop has flushed all soft dependencies.
-	 */
-	if (error == 0)
-		error = ffs_flushfiles(oldmnt, flags, p);
-	/*
-	 * If we are unmounting then it is an error to fail. If we
-	 * are simply trying to downgrade to read-only, then filesystem
-	 * activity can keep us busy forever, so we just fail with EBUSY.
-	 */
-	if (loopcnt == 0) {
-		error = EBUSY;
-	}
-	return (error);
-}
-
-/*
- * Structure hashing.
- * 
- * There are three types of structures that can be looked up:
- *	1) pagedep structures identified by mount point, inode number,
- *	   and logical block.
- *	2) inodedep structures identified by mount point and inode number.
- *	3) newblk structures identified by mount point and
- *	   physical block number.
- *
- * The "pagedep" and "inodedep" dependency structures are hashed
- * separately from the file blocks and inodes to which they correspond.
- * This separation helps when the in-memory copy of an inode or
- * file block must be replaced. It also obviates the need to access
- * an inode or file page when simply updating (or de-allocating)
- * dependency structures. Lookup of newblk structures is needed to
- * find newly allocated blocks when trying to associate them with
- * their allocdirect or allocindir structure.
- *
- * The lookup routines optionally create and hash a new instance when
- * an existing entry is not found.
- */
-#define DEPALLOC	0x0001	/* allocate structure if lookup fails */
-#define NODELAY         0x0002  /* cannot do background work */
-
-SIPHASH_KEY softdep_hashkey;
-
-/*
- * Structures and routines associated with pagedep caching.
- */
-LIST_HEAD(pagedep_hashhead, pagedep) *pagedep_hashtbl;
-u_long	pagedep_hash;		/* size of hash table - 1 */
-STATIC struct sema pagedep_in_progress;
-
-/*
- * Look up a pagedep. Return 1 if found, 0 if not found or found
- * when asked to allocate but not associated with any buffer.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in pagedeppp.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC int
-pagedep_lookup(struct inode *ip, daddr_t lbn, int flags,
-    struct pagedep **pagedeppp)
-{
-	SIPHASH_CTX ctx;
-	struct pagedep *pagedep;
-	struct pagedep_hashhead *pagedephd;
-	struct mount *mp;
-	int i;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("pagedep_lookup: lock not held");
-#endif
-	mp = ITOV(ip)->v_mount;
-
-	SipHash24_Init(&ctx, &softdep_hashkey);
-	SipHash24_Update(&ctx, &mp, sizeof(mp));
-	SipHash24_Update(&ctx, &ip->i_number, sizeof(ip->i_number));
-	SipHash24_Update(&ctx, &lbn, sizeof(lbn));
-	pagedephd = &pagedep_hashtbl[SipHash24_End(&ctx) & pagedep_hash];
-top:
-	LIST_FOREACH(pagedep, pagedephd, pd_hash)
-		if (ip->i_number == pagedep->pd_ino &&
-		    lbn == pagedep->pd_lbn &&
-		    mp == pagedep->pd_mnt)
-			break;
-	if (pagedep) {
-		*pagedeppp = pagedep;
-		if ((flags & DEPALLOC) != 0 &&
-		    (pagedep->pd_state & ONWORKLIST) == 0)
-			return (0);
-		return (1);
-	}
-	if ((flags & DEPALLOC) == 0) {
-		*pagedeppp = NULL;
-		return (0);
-	}
-	if (sema_get(&pagedep_in_progress, &lk) == 0) {
-		ACQUIRE_LOCK(&lk);
-		goto top;
-	}
-	pagedep = pool_get(&pagedep_pool, PR_WAITOK | PR_ZERO);
-	pagedep->pd_list.wk_type = D_PAGEDEP;
-	pagedep->pd_mnt = mp;
-	pagedep->pd_ino = ip->i_number;
-	pagedep->pd_lbn = lbn;
-	LIST_INIT(&pagedep->pd_dirremhd);
-	LIST_INIT(&pagedep->pd_pendinghd);
-	for (i = 0; i < DAHASHSZ; i++)
-		LIST_INIT(&pagedep->pd_diraddhd[i]);
-	ACQUIRE_LOCK(&lk);
-	LIST_INSERT_HEAD(pagedephd, pagedep, pd_hash);
-	sema_release(&pagedep_in_progress);
-	*pagedeppp = pagedep;
-	return (0);
-}
-
-/*
- * Structures and routines associated with inodedep caching.
- */
-LIST_HEAD(inodedep_hashhead, inodedep) *inodedep_hashtbl;
-STATIC u_long	inodedep_hash;	/* size of hash table - 1 */
-STATIC long	num_inodedep;	/* number of inodedep allocated */
-STATIC struct sema inodedep_in_progress;
-
-/*
- * Look up a inodedep. Return 1 if found, 0 if not found.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in inodedeppp.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC int
-inodedep_lookup(struct fs *fs, ufsino_t inum, int flags,
-    struct inodedep **inodedeppp)
-{
-	SIPHASH_CTX ctx;
-	struct inodedep *inodedep;
-	struct inodedep_hashhead *inodedephd;
-	int firsttry;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("inodedep_lookup: lock not held");
-#endif
-	firsttry = 1;
-	SipHash24_Init(&ctx, &softdep_hashkey);
-	SipHash24_Update(&ctx, &fs, sizeof(fs));
-	SipHash24_Update(&ctx, &inum, sizeof(inum));
-	inodedephd = &inodedep_hashtbl[SipHash24_End(&ctx) & inodedep_hash];
-top:
-	LIST_FOREACH(inodedep, inodedephd, id_hash)
-		if (inum == inodedep->id_ino && fs == inodedep->id_fs)
-			break;
-	if (inodedep) {
-		*inodedeppp = inodedep;
-		return (1);
-	}
-	if ((flags & DEPALLOC) == 0) {
-		*inodedeppp = NULL;
-		return (0);
-	}
-	/*
-	 * If we are over our limit, try to improve the situation.
-	 */
-	if (num_inodedep > max_softdeps && firsttry && (flags & NODELAY) == 0 &&
-	    request_cleanup(FLUSH_INODES, 1)) {
-		firsttry = 0;
-		goto top;
-	}
-	if (sema_get(&inodedep_in_progress, &lk) == 0) {
-		ACQUIRE_LOCK(&lk);
-		goto top;
-	}
-	num_inodedep += 1;
-	inodedep = pool_get(&inodedep_pool, PR_WAITOK);
-	inodedep->id_list.wk_type = D_INODEDEP;
-	inodedep->id_fs = fs;
-	inodedep->id_ino = inum;
-	inodedep->id_state = ALLCOMPLETE;
-	inodedep->id_nlinkdelta = 0;
-	inodedep->id_savedino1 = NULL;
-	inodedep->id_savedsize = -1;
-	inodedep->id_buf = NULL;
-	LIST_INIT(&inodedep->id_pendinghd);
-	LIST_INIT(&inodedep->id_inowait);
-	LIST_INIT(&inodedep->id_bufwait);
-	TAILQ_INIT(&inodedep->id_inoupdt);
-	TAILQ_INIT(&inodedep->id_newinoupdt);
-	ACQUIRE_LOCK(&lk);
-	LIST_INSERT_HEAD(inodedephd, inodedep, id_hash);
-	sema_release(&inodedep_in_progress);
-	*inodedeppp = inodedep;
-	return (0);
-}
-
-/*
- * Structures and routines associated with newblk caching.
- */
-LIST_HEAD(newblk_hashhead, newblk) *newblk_hashtbl;
-u_long	newblk_hash;		/* size of hash table - 1 */
-STATIC struct sema newblk_in_progress;
-
-/*
- * Look up a newblk. Return 1 if found, 0 if not found.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in newblkpp.
- */
-STATIC int
-newblk_lookup(struct fs *fs, daddr_t newblkno, int flags,
-    struct newblk **newblkpp)
-{
-	SIPHASH_CTX ctx;
-	struct newblk *newblk;
-	struct newblk_hashhead *newblkhd;
-
-	SipHash24_Init(&ctx, &softdep_hashkey);
-	SipHash24_Update(&ctx, &fs, sizeof(fs));
-	SipHash24_Update(&ctx, &newblkno, sizeof(newblkno));
-	newblkhd = &newblk_hashtbl[SipHash24_End(&ctx) & newblk_hash];
-top:
-	LIST_FOREACH(newblk, newblkhd, nb_hash)
-		if (newblkno == newblk->nb_newblkno && fs == newblk->nb_fs)
-			break;
-	if (newblk) {
-		*newblkpp = newblk;
-		return (1);
-	}
-	if ((flags & DEPALLOC) == 0) {
-		*newblkpp = NULL;
-		return (0);
-	}
-	if (sema_get(&newblk_in_progress, NULL) == 0)
-		goto top;
-	newblk = pool_get(&newblk_pool, PR_WAITOK);
-	newblk->nb_state = 0;
-	newblk->nb_fs = fs;
-	newblk->nb_newblkno = newblkno;
-	LIST_INSERT_HEAD(newblkhd, newblk, nb_hash);
-	sema_release(&newblk_in_progress);
-	*newblkpp = newblk;
-	return (0);
-}
-
-/*
- * Executed during filesystem system initialization before
- * mounting any file systems.
- */
-void 
-softdep_initialize(void)
-{
-
-	bioops.io_start = softdep_disk_io_initiation;
-	bioops.io_complete = softdep_disk_write_complete;
-	bioops.io_deallocate = softdep_deallocate_dependencies;
-	bioops.io_movedeps = softdep_move_dependencies;
-	bioops.io_countdeps = softdep_count_dependencies;
-
-	LIST_INIT(&mkdirlisthd);
-	LIST_INIT(&softdep_workitem_pending);
-#ifdef KMEMSTATS
-	max_softdeps = min (initialvnodes * 8,
-	    kmemstats[M_INODEDEP].ks_limit / (2 * sizeof(struct inodedep)));
-#else
-	max_softdeps = initialvnodes * 4;
-#endif
-	arc4random_buf(&softdep_hashkey, sizeof(softdep_hashkey));
-	pagedep_hashtbl = hashinit(initialvnodes / 5, M_PAGEDEP, M_WAITOK,
-	    &pagedep_hash);
-	sema_init(&pagedep_in_progress, "pagedep", PRIBIO);
-	inodedep_hashtbl = hashinit(initialvnodes, M_INODEDEP, M_WAITOK,
-	    &inodedep_hash);
-	sema_init(&inodedep_in_progress, "inodedep", PRIBIO);
-	newblk_hashtbl = hashinit(64, M_NEWBLK, M_WAITOK, &newblk_hash);
-	sema_init(&newblk_in_progress, "newblk", PRIBIO);
-	timeout_set(&proc_waiting_timeout, pause_timer, NULL);
-	pool_init(&pagedep_pool, sizeof(struct pagedep), 0, IPL_NONE,
-	    PR_WAITOK, "pagedep", NULL);
-	pool_init(&inodedep_pool, sizeof(struct inodedep), 0, IPL_NONE,
-	    PR_WAITOK, "inodedep", NULL);
-	pool_init(&newblk_pool, sizeof(struct newblk), 0, IPL_NONE,
-	    PR_WAITOK, "newblk", NULL);
-	pool_init(&bmsafemap_pool, sizeof(struct bmsafemap), 0, IPL_NONE,
-	    PR_WAITOK, "bmsafemap", NULL);
-	pool_init(&allocdirect_pool, sizeof(struct allocdirect), 0, IPL_NONE,
-	    PR_WAITOK, "allocdir", NULL);
-	pool_init(&indirdep_pool, sizeof(struct indirdep), 0, IPL_NONE,
-	    PR_WAITOK, "indirdep", NULL);
-	pool_init(&allocindir_pool, sizeof(struct allocindir), 0, IPL_NONE,
-	    PR_WAITOK, "allocindir", NULL);
-	pool_init(&freefrag_pool, sizeof(struct freefrag), 0, IPL_NONE,
-	    PR_WAITOK, "freefrag", NULL);
-	pool_init(&freeblks_pool, sizeof(struct freeblks), 0, IPL_NONE,
-	    PR_WAITOK, "freeblks", NULL);
-	pool_init(&freefile_pool, sizeof(struct freefile), 0, IPL_NONE,
-	    PR_WAITOK, "freefile", NULL);
-	pool_init(&diradd_pool, sizeof(struct diradd), 0, IPL_NONE,
-	    PR_WAITOK, "diradd", NULL);
-	pool_init(&mkdir_pool, sizeof(struct mkdir), 0, IPL_NONE,
-	    PR_WAITOK, "mkdir", NULL);
-	pool_init(&dirrem_pool, sizeof(struct dirrem), 0, IPL_NONE,
-	    PR_WAITOK, "dirrem", NULL);
-	pool_init(&newdirblk_pool, sizeof(struct newdirblk), 0, IPL_NONE,
-	    PR_WAITOK, "newdirblk", NULL);
-}
-
-/*
- * Called at mount time to notify the dependency code that a
- * filesystem wishes to use it.
- */
-int
-softdep_mount(struct vnode *devvp, struct mount *mp, struct fs *fs,
-    struct ucred *cred)
-{
-	struct csum_total cstotal;
-	struct cg *cgp;
-	struct buf *bp;
-	int error, cyl;
-
-	KASSERTMSG(1, "softdep_mount should not have been called");
-
-	/*
-	 * When doing soft updates, the counters in the
-	 * superblock may have gotten out of sync, so we have
-	 * to scan the cylinder groups and recalculate them.
-	 */
-	if ((fs->fs_flags & FS_UNCLEAN) == 0)
-		return (0);
-	memset(&cstotal, 0, sizeof(cstotal));
-	for (cyl = 0; cyl < fs->fs_ncg; cyl++) {
-		if ((error = bread(devvp, fsbtodb(fs, cgtod(fs, cyl)),
-		    fs->fs_cgsize, &bp)) != 0) {
-			brelse(bp);
-			return (error);
-		}
-		cgp = (struct cg *)bp->b_data;
-		cstotal.cs_nffree += cgp->cg_cs.cs_nffree;
-		cstotal.cs_nbfree += cgp->cg_cs.cs_nbfree;
-		cstotal.cs_nifree += cgp->cg_cs.cs_nifree;
-		cstotal.cs_ndir += cgp->cg_cs.cs_ndir;
-		fs->fs_cs(fs, cyl) = cgp->cg_cs;
-		brelse(bp);
-	}
-#ifdef DEBUG
-	if (memcmp(&cstotal, &fs->fs_cstotal, sizeof(cstotal)))
-		printf("ffs_mountfs: superblock updated for soft updates\n");
-#endif
-	memcpy(&fs->fs_cstotal, &cstotal, sizeof(cstotal));
-	return (0);
-}
-
-/*
- * Protecting the freemaps (or bitmaps).
- * 
- * To eliminate the need to execute fsck before mounting a file system
- * after a power failure, one must (conservatively) guarantee that the
- * on-disk copy of the bitmaps never indicate that a live inode or block is
- * free.  So, when a block or inode is allocated, the bitmap should be
- * updated (on disk) before any new pointers.  When a block or inode is
- * freed, the bitmap should not be updated until all pointers have been
- * reset.  The latter dependency is handled by the delayed de-allocation
- * approach described below for block and inode de-allocation.  The former
- * dependency is handled by calling the following procedure when a block or
- * inode is allocated. When an inode is allocated an "inodedep" is created
- * with its DEPCOMPLETE flag cleared until its bitmap is written to disk.
- * Each "inodedep" is also inserted into the hash indexing structure so
- * that any additional link additions can be made dependent on the inode
- * allocation.
- * 
- * The ufs file system maintains a number of free block counts (e.g., per
- * cylinder group, per cylinder and per <cylinder, rotational position> pair)
- * in addition to the bitmaps.  These counts are used to improve efficiency
- * during allocation and therefore must be consistent with the bitmaps.
- * There is no convenient way to guarantee post-crash consistency of these
- * counts with simple update ordering, for two main reasons: (1) The counts
- * and bitmaps for a single cylinder group block are not in the same disk
- * sector.  If a disk write is interrupted (e.g., by power failure), one may
- * be written and the other not.  (2) Some of the counts are located in the
- * superblock rather than the cylinder group block. So, we focus our soft
- * updates implementation on protecting the bitmaps. When mounting a
- * filesystem, we recompute the auxiliary counts from the bitmaps.
- */
-
-/*
- * Called just after updating the cylinder group block to allocate an inode.
- */
-/* buffer for cylgroup block with inode map */
-/* inode related to allocation */
-/* new inode number being allocated */
-void
-softdep_setup_inomapdep(struct buf *bp, struct inode *ip, ufsino_t newinum)
-{
-	struct inodedep *inodedep;
-	struct bmsafemap *bmsafemap;
-
-	/*
-	 * Create a dependency for the newly allocated inode.
-	 * Panic if it already exists as something is seriously wrong.
-	 * Otherwise add it to the dependency list for the buffer holding
-	 * the cylinder group map from which it was allocated.
-	 */
-	ACQUIRE_LOCK(&lk);
-	if (inodedep_lookup(ip->i_fs, newinum, DEPALLOC | NODELAY, &inodedep)
-	    != 0) {
-		FREE_LOCK(&lk);
-		panic("softdep_setup_inomapdep: found inode");
-	}
-	inodedep->id_buf = bp;
-	inodedep->id_state &= ~DEPCOMPLETE;
-	bmsafemap = bmsafemap_lookup(bp);
-	LIST_INSERT_HEAD(&bmsafemap->sm_inodedephd, inodedep, id_deps);
-	FREE_LOCK(&lk);
-}
-
-/*
- * Called just after updating the cylinder group block to
- * allocate block or fragment.
- */
-/* buffer for cylgroup block with block map */
-/* filesystem doing allocation */
-/* number of newly allocated block */
-void
-softdep_setup_blkmapdep(struct buf *bp, struct fs *fs, daddr_t newblkno)
-{
-	struct newblk *newblk;
-	struct bmsafemap *bmsafemap;
-
-	/*
-	 * Create a dependency for the newly allocated block.
-	 * Add it to the dependency list for the buffer holding
-	 * the cylinder group map from which it was allocated.
-	 */
-	if (newblk_lookup(fs, newblkno, DEPALLOC, &newblk) != 0)
-		panic("softdep_setup_blkmapdep: found block");
-	ACQUIRE_LOCK(&lk);
-	newblk->nb_bmsafemap = bmsafemap = bmsafemap_lookup(bp);
-	LIST_INSERT_HEAD(&bmsafemap->sm_newblkhd, newblk, nb_deps);
-	FREE_LOCK(&lk);
-}
-
-/*
- * Find the bmsafemap associated with a cylinder group buffer.
- * If none exists, create one. The buffer must be locked when
- * this routine is called and this routine must be called with
- * splbio interrupts blocked.
- */
-STATIC struct bmsafemap *
-bmsafemap_lookup(struct buf *bp)
-{
-	struct bmsafemap *bmsafemap;
-	struct worklist *wk;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("bmsafemap_lookup: lock not held");
-#endif
-	LIST_FOREACH(wk, &bp->b_dep, wk_list)
-		if (wk->wk_type == D_BMSAFEMAP)
-			return (WK_BMSAFEMAP(wk));
-	FREE_LOCK(&lk);
-	bmsafemap = pool_get(&bmsafemap_pool, PR_WAITOK);
-	bmsafemap->sm_list.wk_type = D_BMSAFEMAP;
-	bmsafemap->sm_list.wk_state = 0;
-	bmsafemap->sm_buf = bp;
-	LIST_INIT(&bmsafemap->sm_allocdirecthd);
-	LIST_INIT(&bmsafemap->sm_allocindirhd);
-	LIST_INIT(&bmsafemap->sm_inodedephd);
-	LIST_INIT(&bmsafemap->sm_newblkhd);
-	ACQUIRE_LOCK(&lk);
-	WORKLIST_INSERT(&bp->b_dep, &bmsafemap->sm_list);
-	return (bmsafemap);
-}
-
-/*
- * Direct block allocation dependencies.
- * 
- * When a new block is allocated, the corresponding disk locations must be
- * initialized (with zeros or new data) before the on-disk inode points to
- * them.  Also, the freemap from which the block was allocated must be
- * updated (on disk) before the inode's pointer. These two dependencies are
- * independent of each other and are needed for all file blocks and indirect
- * blocks that are pointed to directly by the inode.  Just before the
- * "in-core" version of the inode is updated with a newly allocated block
- * number, a procedure (below) is called to setup allocation dependency
- * structures.  These structures are removed when the corresponding
- * dependencies are satisfied or when the block allocation becomes obsolete
- * (i.e., the file is deleted, the block is de-allocated, or the block is a
- * fragment that gets upgraded).  All of these cases are handled in
- * procedures described later.
- * 
- * When a file extension causes a fragment to be upgraded, either to a larger
- * fragment or to a full block, the on-disk location may change (if the
- * previous fragment could not simply be extended). In this case, the old
- * fragment must be de-allocated, but not until after the inode's pointer has
- * been updated. In most cases, this is handled by later procedures, which
- * will construct a "freefrag" structure to be added to the workitem queue
- * when the inode update is complete (or obsolete).  The main exception to
- * this is when an allocation occurs while a pending allocation dependency
- * (for the same block pointer) remains.  This case is handled in the main
- * allocation dependency setup procedure by immediately freeing the
- * unreferenced fragments.
- */ 
-/* inode to which block is being added */
-/* block pointer within inode */
-/* disk block number being added */
-/* previous block number, 0 unless frag */
-/* size of new block */
-/* size of new block */
-/* bp for allocated block */
-void 
-softdep_setup_allocdirect(struct inode *ip, daddr_t lbn, daddr_t newblkno,
-    daddr_t oldblkno, long newsize, long oldsize, struct buf *bp)
-{
-	struct allocdirect *adp, *oldadp;
-	struct allocdirectlst *adphead;
-	struct bmsafemap *bmsafemap;
-	struct inodedep *inodedep;
-	struct pagedep *pagedep;
-	struct newblk *newblk;
-
-	adp = pool_get(&allocdirect_pool, PR_WAITOK | PR_ZERO);
-	adp->ad_list.wk_type = D_ALLOCDIRECT;
-	adp->ad_lbn = lbn;
-	adp->ad_newblkno = newblkno;
-	adp->ad_oldblkno = oldblkno;
-	adp->ad_newsize = newsize;
-	adp->ad_oldsize = oldsize;
-	adp->ad_state = ATTACHED;
-	LIST_INIT(&adp->ad_newdirblk);
-	if (newblkno == oldblkno)
-		adp->ad_freefrag = NULL;
-	else
-		adp->ad_freefrag = newfreefrag(ip, oldblkno, oldsize);
-
-	if (newblk_lookup(ip->i_fs, newblkno, 0, &newblk) == 0)
-		panic("softdep_setup_allocdirect: lost block");
-
-	ACQUIRE_LOCK(&lk);
-	inodedep_lookup(ip->i_fs, ip->i_number, DEPALLOC | NODELAY, &inodedep);
-	adp->ad_inodedep = inodedep;
-
-	if (newblk->nb_state == DEPCOMPLETE) {
-		adp->ad_state |= DEPCOMPLETE;
-		adp->ad_buf = NULL;
-	} else {
-		bmsafemap = newblk->nb_bmsafemap;
-		adp->ad_buf = bmsafemap->sm_buf;
-		LIST_REMOVE(newblk, nb_deps);
-		LIST_INSERT_HEAD(&bmsafemap->sm_allocdirecthd, adp, ad_deps);
-	}
-	LIST_REMOVE(newblk, nb_hash);
-	pool_put(&newblk_pool, newblk);
-
-	if (bp == NULL) {
-		/*
-		 * XXXUBC - Yes, I know how to fix this, but not right now.
-		 */
-		panic("softdep_setup_allocdirect: Bonk art in the head");
-	}
-	WORKLIST_INSERT(&bp->b_dep, &adp->ad_list);
-	if (lbn >= NDADDR) {
-		/* allocating an indirect block */
-		if (oldblkno != 0) {
-			FREE_LOCK(&lk);
-			panic("softdep_setup_allocdirect: non-zero indir");
-		}
-	} else {
-		/*
-		 * Allocating a direct block.
-		 *
-		 * If we are allocating a directory block, then we must
-		 * allocate an associated pagedep to track additions and
-		 * deletions.
-		 */
-		if ((DIP(ip, mode) & IFMT) == IFDIR &&
-		    pagedep_lookup(ip, lbn, DEPALLOC, &pagedep) == 0)
-			WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
-	}
-	/*
-	 * The list of allocdirects must be kept in sorted and ascending
-	 * order so that the rollback routines can quickly determine the
-	 * first uncommitted block (the size of the file stored on disk
-	 * ends at the end of the lowest committed fragment, or if there
-	 * are no fragments, at the end of the highest committed block).
-	 * Since files generally grow, the typical case is that the new
-	 * block is to be added at the end of the list. We speed this
-	 * special case by checking against the last allocdirect in the
-	 * list before laboriously traversing the list looking for the
-	 * insertion point.
-	 */
-	adphead = &inodedep->id_newinoupdt;
-	oldadp = TAILQ_LAST(adphead, allocdirectlst);
-	if (oldadp == NULL || oldadp->ad_lbn <= lbn) {
-		/* insert at end of list */
-		TAILQ_INSERT_TAIL(adphead, adp, ad_next);
-		if (oldadp != NULL && oldadp->ad_lbn == lbn)
-			allocdirect_merge(adphead, adp, oldadp);
-		FREE_LOCK(&lk);
-		return;
-	}
-	TAILQ_FOREACH(oldadp, adphead, ad_next) {
-		if (oldadp->ad_lbn >= lbn)
-			break;
-	}
-	if (oldadp == NULL) {
-		FREE_LOCK(&lk);
-		panic("softdep_setup_allocdirect: lost entry");
-	}
-	/* insert in middle of list */
-	TAILQ_INSERT_BEFORE(oldadp, adp, ad_next);
-	if (oldadp->ad_lbn == lbn)
-		allocdirect_merge(adphead, adp, oldadp);
-	FREE_LOCK(&lk);
-}
-
-/*
- * Replace an old allocdirect dependency with a newer one.
- * This routine must be called with splbio interrupts blocked.
- */
-/* head of list holding allocdirects */
-/* allocdirect being added */
-/* existing allocdirect being checked */
-STATIC void
-allocdirect_merge(struct allocdirectlst *adphead, struct allocdirect *newadp,
-    struct allocdirect *oldadp)
-{
-	struct worklist *wk;
-	struct freefrag *freefrag;
-	struct newdirblk *newdirblk;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("allocdirect_merge: lock not held");
-#endif
-	if (newadp->ad_oldblkno != oldadp->ad_newblkno ||
-	    newadp->ad_oldsize != oldadp->ad_newsize ||
-	    newadp->ad_lbn >= NDADDR) {
-		FREE_LOCK(&lk);
-		panic("allocdirect_merge: old %lld != new %lld || lbn %lld >= "
-		    "%d", (long long)newadp->ad_oldblkno,
-		    (long long)oldadp->ad_newblkno, (long long)newadp->ad_lbn,
-		    NDADDR);
-	}
-	newadp->ad_oldblkno = oldadp->ad_oldblkno;
-	newadp->ad_oldsize = oldadp->ad_oldsize;
-	/*
-	 * If the old dependency had a fragment to free or had never
-	 * previously had a block allocated, then the new dependency
-	 * can immediately post its freefrag and adopt the old freefrag.
-	 * This action is done by swapping the freefrag dependencies.
-	 * The new dependency gains the old one's freefrag, and the
-	 * old one gets the new one and then immediately puts it on
-	 * the worklist when it is freed by free_allocdirect. It is
-	 * not possible to do this swap when the old dependency had a
-	 * non-zero size but no previous fragment to free. This condition
-	 * arises when the new block is an extension of the old block.
-	 * Here, the first part of the fragment allocated to the new
-	 * dependency is part of the block currently claimed on disk by
-	 * the old dependency, so cannot legitimately be freed until the
-	 * conditions for the new dependency are fulfilled.
-	 */
-	if (oldadp->ad_freefrag != NULL || oldadp->ad_oldblkno == 0) {
-		freefrag = newadp->ad_freefrag;
-		newadp->ad_freefrag = oldadp->ad_freefrag;
-		oldadp->ad_freefrag = freefrag;
-	}
-	/*
-	 * If we are tracking a new directory-block allocation,
-	 * move it from the old allocdirect to the new allocdirect.
-	 */
-	if ((wk = LIST_FIRST(&oldadp->ad_newdirblk)) != NULL) {
-		newdirblk = WK_NEWDIRBLK(wk);
-		WORKLIST_REMOVE(&newdirblk->db_list);
-		if (LIST_FIRST(&oldadp->ad_newdirblk) != NULL)
-			panic("allocdirect_merge: extra newdirblk");
-		WORKLIST_INSERT(&newadp->ad_newdirblk, &newdirblk->db_list);
-	}
-	free_allocdirect(adphead, oldadp, 0);
-}
-		
-/*
- * Allocate a new freefrag structure if needed.
- */
-STATIC struct freefrag *
-newfreefrag(struct inode *ip, daddr_t blkno, long size)
-{
-	struct freefrag *freefrag;
-	struct fs *fs;
-
-	if (blkno == 0)
-		return (NULL);
-	fs = ip->i_fs;
-	if (fragnum(fs, blkno) + numfrags(fs, size) > fs->fs_frag)
-		panic("newfreefrag: frag size");
-	freefrag = pool_get(&freefrag_pool, PR_WAITOK);
-	freefrag->ff_list.wk_type = D_FREEFRAG;
-	freefrag->ff_state = DIP(ip, uid) & ~ONWORKLIST; /* used below */
-	freefrag->ff_inum = ip->i_number;
-	freefrag->ff_mnt = ITOV(ip)->v_mount;
-	freefrag->ff_devvp = ip->i_devvp;
-	freefrag->ff_blkno = blkno;
-	freefrag->ff_fragsize = size;
-	return (freefrag);
-}
-
-/*
- * This workitem de-allocates fragments that were replaced during
- * file block allocation.
- */
-STATIC void 
-handle_workitem_freefrag(struct freefrag *freefrag)
-{
-	struct inode tip;
-	struct ufs1_dinode dtip1;
-
-	tip.i_vnode = NULL;
-	tip.i_din1 = &dtip1;
-	tip.i_fs = VFSTOUFS(freefrag->ff_mnt)->um_fs;
-	tip.i_ump = VFSTOUFS(freefrag->ff_mnt);
-	tip.i_dev = freefrag->ff_devvp->v_rdev;
-	tip.i_number = freefrag->ff_inum;
-	tip.i_ffs1_uid = freefrag->ff_state & ~ONWORKLIST; /* set above */
-	ffs_blkfree(&tip, freefrag->ff_blkno, freefrag->ff_fragsize);
-	pool_put(&freefrag_pool, freefrag);
-}
-
-/*
- * Indirect block allocation dependencies.
- * 
- * The same dependencies that exist for a direct block also exist when
- * a new block is allocated and pointed to by an entry in a block of
- * indirect pointers. The undo/redo states described above are also
- * used here. Because an indirect block contains many pointers that
- * may have dependencies, a second copy of the entire in-memory indirect
- * block is kept. The buffer cache copy is always completely up-to-date.
- * The second copy, which is used only as a source for disk writes,
- * contains only the safe pointers (i.e., those that have no remaining
- * update dependencies). The second copy is freed when all pointers
- * are safe. The cache is not allowed to replace indirect blocks with
- * pending update dependencies. If a buffer containing an indirect
- * block with dependencies is written, these routines will mark it
- * dirty again. It can only be successfully written once all the
- * dependencies are removed. The ffs_fsync routine in conjunction with
- * softdep_sync_metadata work together to get all the dependencies
- * removed so that a file can be successfully written to disk. Three
- * procedures are used when setting up indirect block pointer
- * dependencies. The division is necessary because of the organization
- * of the "balloc" routine and because of the distinction between file
- * pages and file metadata blocks.
- */
-
-/*
- * Allocate a new allocindir structure.
- */
-/* inode for file being extended */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-/* previous block number, 0 if none */
-STATIC struct allocindir *
-newallocindir(struct inode *ip, int ptrno, daddr_t newblkno,
-    daddr_t oldblkno)
-{
-	struct allocindir *aip;
-
-	aip = pool_get(&allocindir_pool, PR_WAITOK | PR_ZERO);
-	aip->ai_list.wk_type = D_ALLOCINDIR;
-	aip->ai_state = ATTACHED;
-	aip->ai_offset = ptrno;
-	aip->ai_newblkno = newblkno;
-	aip->ai_oldblkno = oldblkno;
-	aip->ai_freefrag = newfreefrag(ip, oldblkno, ip->i_fs->fs_bsize);
-	return (aip);
-}
-
-/*
- * Called just before setting an indirect block pointer
- * to a newly allocated file page.
- */
-/* inode for file being extended */
-/* allocated block number within file */
-/* buffer with indirect blk referencing page */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-/* previous block number, 0 if none */
-/* buffer holding allocated page */
-void
-softdep_setup_allocindir_page(struct inode *ip, daddr_t lbn, struct buf *bp,
-    int ptrno, daddr_t newblkno, daddr_t oldblkno, struct buf *nbp)
-{
-	struct allocindir *aip;
-	struct pagedep *pagedep;
-
-	aip = newallocindir(ip, ptrno, newblkno, oldblkno);
-	ACQUIRE_LOCK(&lk);
-	/*
-	 * If we are allocating a directory page, then we must
-	 * allocate an associated pagedep to track additions and
-	 * deletions.
-	 */
-	if ((DIP(ip, mode) & IFMT) == IFDIR &&
-	    pagedep_lookup(ip, lbn, DEPALLOC, &pagedep) == 0)
-		WORKLIST_INSERT(&nbp->b_dep, &pagedep->pd_list);
-	if (nbp == NULL) {
-		/*
-		 * XXXUBC - Yes, I know how to fix this, but not right now.
-		 */
-		panic("softdep_setup_allocindir_page: Bonk art in the head");
-	}
-	WORKLIST_INSERT(&nbp->b_dep, &aip->ai_list);
-	FREE_LOCK(&lk);
-	setup_allocindir_phase2(bp, ip, aip);
-}
-
-/*
- * Called just before setting an indirect block pointer to a
- * newly allocated indirect block.
- */
-/* newly allocated indirect block */
-/* inode for file being extended */
-/* indirect block referencing allocated block */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-void
-softdep_setup_allocindir_meta(struct buf *nbp, struct inode *ip,
-    struct buf *bp, int ptrno, daddr_t newblkno)
-{
-	struct allocindir *aip;
-
-	aip = newallocindir(ip, ptrno, newblkno, 0);
-	ACQUIRE_LOCK(&lk);
-	WORKLIST_INSERT(&nbp->b_dep, &aip->ai_list);
-	FREE_LOCK(&lk);
-	setup_allocindir_phase2(bp, ip, aip);
-}
-
-/*
- * Called to finish the allocation of the "aip" allocated
- * by one of the two routines above.
- */
-/* in-memory copy of the indirect block */
-/* inode for file being extended */
-/* allocindir allocated by the above routines */
-STATIC void 
-setup_allocindir_phase2(struct buf *bp, struct inode *ip,
-    struct allocindir *aip)
-{
-	struct worklist *wk;
-	struct indirdep *indirdep, *newindirdep;
-	struct bmsafemap *bmsafemap;
-	struct allocindir *oldaip;
-	struct freefrag *freefrag;
-	struct newblk *newblk;
-
-	if (bp->b_lblkno >= 0)
-		panic("setup_allocindir_phase2: not indir blk");
-	for (indirdep = NULL, newindirdep = NULL; ; ) {
-		ACQUIRE_LOCK(&lk);
-		LIST_FOREACH(wk, &bp->b_dep, wk_list) {
-			if (wk->wk_type != D_INDIRDEP)
-				continue;
-			indirdep = WK_INDIRDEP(wk);
-			break;
-		}
-		if (indirdep == NULL && newindirdep) {
-			indirdep = newindirdep;
-			WORKLIST_INSERT(&bp->b_dep, &indirdep->ir_list);
-			newindirdep = NULL;
-		}
-		FREE_LOCK(&lk);
-		if (indirdep) {
-			if (newblk_lookup(ip->i_fs, aip->ai_newblkno, 0,
-			    &newblk) == 0)
-				panic("setup_allocindir: lost block");
-			ACQUIRE_LOCK(&lk);
-			if (newblk->nb_state == DEPCOMPLETE) {
-				aip->ai_state |= DEPCOMPLETE;
-				aip->ai_buf = NULL;
-			} else {
-				bmsafemap = newblk->nb_bmsafemap;
-				aip->ai_buf = bmsafemap->sm_buf;
-				LIST_REMOVE(newblk, nb_deps);
-				LIST_INSERT_HEAD(&bmsafemap->sm_allocindirhd,
-				    aip, ai_deps);
-			}
-			LIST_REMOVE(newblk, nb_hash);
-			pool_put(&newblk_pool, newblk);
-			aip->ai_indirdep = indirdep;
-			/*
-			 * Check to see if there is an existing dependency
-			 * for this block. If there is, merge the old
-			 * dependency into the new one.
-			 */
-			if (aip->ai_oldblkno == 0)
-				oldaip = NULL;
-			else
-
-				LIST_FOREACH(oldaip, &indirdep->ir_deplisthd, ai_next)
-					if (oldaip->ai_offset == aip->ai_offset)
-						break;
-			freefrag = NULL;
-			if (oldaip != NULL) {
-				if (oldaip->ai_newblkno != aip->ai_oldblkno) {
-					FREE_LOCK(&lk);
-					panic("setup_allocindir_phase2: blkno");
-				}
-				aip->ai_oldblkno = oldaip->ai_oldblkno;
-				freefrag = aip->ai_freefrag;
-				aip->ai_freefrag = oldaip->ai_freefrag;
-				oldaip->ai_freefrag = NULL;
-				free_allocindir(oldaip, NULL);
-			}
-			LIST_INSERT_HEAD(&indirdep->ir_deplisthd, aip, ai_next);
-			if (ip->i_ump->um_fstype == UM_UFS1)
-				((int32_t *)indirdep->ir_savebp->b_data)
-				    [aip->ai_offset] = aip->ai_oldblkno;
-			else
-				((int64_t *)indirdep->ir_savebp->b_data)
-				    [aip->ai_offset] = aip->ai_oldblkno;
-			FREE_LOCK(&lk);
-			if (freefrag != NULL)
-				handle_workitem_freefrag(freefrag);
-		}
-		if (newindirdep) {
-			if (indirdep->ir_savebp != NULL)
-				brelse(newindirdep->ir_savebp);
-			WORKITEM_FREE(newindirdep, D_INDIRDEP);
-		}
-		if (indirdep)
-			break;
-		newindirdep = pool_get(&indirdep_pool, PR_WAITOK);
-		newindirdep->ir_list.wk_type = D_INDIRDEP;
-		newindirdep->ir_state = ATTACHED;
-		if (ip->i_ump->um_fstype == UM_UFS1)
-			newindirdep->ir_state |= UFS1FMT;
-		LIST_INIT(&newindirdep->ir_deplisthd);
-		LIST_INIT(&newindirdep->ir_donehd);
-		if (bp->b_blkno == bp->b_lblkno) {
-			VOP_BMAP(bp->b_vp, bp->b_lblkno, NULL, &bp->b_blkno,
-				NULL);
-		}
-		newindirdep->ir_savebp =
-		    getblk(ip->i_devvp, bp->b_blkno, bp->b_bcount, 0, INFSLP);
-#if 0
-		BUF_KERNPROC(newindirdep->ir_savebp);
-#endif
-		memcpy(newindirdep->ir_savebp->b_data, bp->b_data, bp->b_bcount);
-	}
-}
-
-/*
- * Block de-allocation dependencies.
- * 
- * When blocks are de-allocated, the on-disk pointers must be nullified before
- * the blocks are made available for use by other files.  (The true
- * requirement is that old pointers must be nullified before new on-disk
- * pointers are set.  We chose this slightly more stringent requirement to
- * reduce complexity.) Our implementation handles this dependency by updating
- * the inode (or indirect block) appropriately but delaying the actual block
- * de-allocation (i.e., freemap and free space count manipulation) until
- * after the updated versions reach stable storage.  After the disk is
- * updated, the blocks can be safely de-allocated whenever it is convenient.
- * This implementation handles only the common case of reducing a file's
- * length to zero. Other cases are handled by the conventional synchronous
- * write approach.
- *
- * The ffs implementation with which we worked double-checks
- * the state of the block pointers and file size as it reduces
- * a file's length.  Some of this code is replicated here in our
- * soft updates implementation.  The freeblks->fb_chkcnt field is
- * used to transfer a part of this information to the procedure
- * that eventually de-allocates the blocks.
- *
- * This routine should be called from the routine that shortens
- * a file's length, before the inode's size or block pointers
- * are modified. It will save the block pointer information for
- * later release and zero the inode so that the calling routine
- * can release it.
- */
-/* The inode whose length is to be reduced */
-/* The new length for the file */
-void
-softdep_setup_freeblocks(struct inode *ip, off_t length)
-{
-	struct freeblks *freeblks;
-	struct inodedep *inodedep;
-	struct allocdirect *adp;
-	struct vnode *vp;
-	struct buf *bp;
-	struct fs *fs;
-	int i, delay, error;
-
-	fs = ip->i_fs;
-	if (length != 0)
-		panic("softdep_setup_freeblocks: non-zero length");
-	freeblks = pool_get(&freeblks_pool, PR_WAITOK | PR_ZERO);
-	freeblks->fb_list.wk_type = D_FREEBLKS;
-	freeblks->fb_state = ATTACHED;
-	freeblks->fb_uid = DIP(ip, uid);
-	freeblks->fb_previousinum = ip->i_number;
-	freeblks->fb_devvp = ip->i_devvp;
-	freeblks->fb_mnt = ITOV(ip)->v_mount;
-	freeblks->fb_oldsize = DIP(ip, size);
-	freeblks->fb_newsize = length;
-	freeblks->fb_chkcnt = DIP(ip, blocks);
-
-	for (i = 0; i < NDADDR; i++) {
-		freeblks->fb_dblks[i] = DIP(ip, db[i]);
-		DIP_ASSIGN(ip, db[i], 0);
-	}
-
-	for (i = 0; i < NIADDR; i++) {
-		freeblks->fb_iblks[i] = DIP(ip, ib[i]);
-		DIP_ASSIGN(ip, ib[i], 0);
-	}
-
-	DIP_ASSIGN(ip, blocks, 0);
-	DIP_ASSIGN(ip, size, 0);
-
-	/*
-	 * Push the zero'ed inode to its disk buffer so that we are free
-	 * to delete its dependencies below. Once the dependencies are gone
-	 * the buffer can be safely released.
-	 */
-	if ((error = bread(ip->i_devvp,
-	    fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
-	    (int)fs->fs_bsize, &bp)) != 0)
-		softdep_error("softdep_setup_freeblocks", error);
-
-	if (ip->i_ump->um_fstype == UM_UFS1)
-		*((struct ufs1_dinode *) bp->b_data +
-		    ino_to_fsbo(fs, ip->i_number)) = *ip->i_din1;
-	else
-		*((struct ufs2_dinode *) bp->b_data +
-		    ino_to_fsbo(fs, ip->i_number)) = *ip->i_din2;
-
-	/*
-	 * Find and eliminate any inode dependencies.
-	 */
-	ACQUIRE_LOCK(&lk);
-	(void) inodedep_lookup(fs, ip->i_number, DEPALLOC, &inodedep);
-	if ((inodedep->id_state & IOSTARTED) != 0) {
-		FREE_LOCK(&lk);
-		panic("softdep_setup_freeblocks: inode busy");
-	}
-	/*
-	 * Add the freeblks structure to the list of operations that
-	 * must await the zero'ed inode being written to disk. If we
-	 * still have a bitmap dependency (delay == 0), then the inode
-	 * has never been written to disk, so we can process the
-	 * freeblks below once we have deleted the dependencies.
-	 */
-	delay = (inodedep->id_state & DEPCOMPLETE);
-	if (delay)
-		WORKLIST_INSERT(&inodedep->id_bufwait, &freeblks->fb_list);
-	/*
-	 * Because the file length has been truncated to zero, any
-	 * pending block allocation dependency structures associated
-	 * with this inode are obsolete and can simply be de-allocated.
-	 * We must first merge the two dependency lists to get rid of
-	 * any duplicate freefrag structures, then purge the merged list.
-	 * If we still have a bitmap dependency, then the inode has never
-	 * been written to disk, so we can free any fragments without delay.
-	 */
-	merge_inode_lists(inodedep);
-	while ((adp = TAILQ_FIRST(&inodedep->id_inoupdt)) != NULL)
-		free_allocdirect(&inodedep->id_inoupdt, adp, delay);
-	FREE_LOCK(&lk);
-	bdwrite(bp);
-	/*
-	 * We must wait for any I/O in progress to finish so that
-	 * all potential buffers on the dirty list will be visible.
-	 * Once they are all there, walk the list and get rid of
-	 * any dependencies.
-	 */
-	vp = ITOV(ip);
-	ACQUIRE_LOCK(&lk);
-	drain_output(vp, 1);
-	while ((bp = LIST_FIRST(&vp->v_dirtyblkhd))) {
-		if (getdirtybuf(bp, MNT_WAIT) <= 0)
-			break;
-		(void) inodedep_lookup(fs, ip->i_number, 0, &inodedep);
-		deallocate_dependencies(bp, inodedep);
-		bp->b_flags |= B_INVAL | B_NOCACHE;
-		FREE_LOCK(&lk);
-		brelse(bp);
-		ACQUIRE_LOCK(&lk);
-	}
-	if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) != 0)
-		(void) free_inodedep(inodedep);
-
-	if (delay) {
-		freeblks->fb_state |= DEPCOMPLETE;
-		/*
-		 * If the inode with zeroed block pointers is now on disk we
-		 * can start freeing blocks. Add freeblks to the worklist
-		 * instead of calling handle_workitem_freeblocks() directly as
-		 * it is more likely that additional IO is needed to complete
-		 * the request than in the !delay case.
-		 */
-		if ((freeblks->fb_state & ALLCOMPLETE) == ALLCOMPLETE)
-			add_to_worklist(&freeblks->fb_list);
-	}
-
-	FREE_LOCK(&lk);
-	/*
-	 * If the inode has never been written to disk (delay == 0),
-	 * then we can process the freeblks now that we have deleted
-	 * the dependencies.
-	 */
-	if (!delay)
-		handle_workitem_freeblocks(freeblks);
-}
-
-/*
- * Reclaim any dependency structures from a buffer that is about to
- * be reallocated to a new vnode. The buffer must be locked, thus,
- * no I/O completion operations can occur while we are manipulating
- * its associated dependencies. The mutex is held so that other I/O's
- * associated with related dependencies do not occur.
- */
-STATIC void
-deallocate_dependencies(struct buf *bp, struct inodedep *inodedep)
-{
-	struct worklist *wk;
-	struct indirdep *indirdep;
-	struct allocindir *aip;
-	struct pagedep *pagedep;
-	struct dirrem *dirrem;
-	struct diradd *dap;
-	int i;
-
-	while ((wk = LIST_FIRST(&bp->b_dep)) != NULL) {
-		switch (wk->wk_type) {
-
-		case D_INDIRDEP:
-			indirdep = WK_INDIRDEP(wk);
-			/*
-			 * None of the indirect pointers will ever be visible,
-			 * so they can simply be tossed. GOINGAWAY ensures
-			 * that allocated pointers will be saved in the buffer
-			 * cache until they are freed. Note that they will
-			 * only be able to be found by their physical address
-			 * since the inode mapping the logical address will
-			 * be gone. The save buffer used for the safe copy
-			 * was allocated in setup_allocindir_phase2 using
-			 * the physical address so it could be used for this
-			 * purpose. Hence we swap the safe copy with the real
-			 * copy, allowing the safe copy to be freed and holding
-			 * on to the real copy for later use in indir_trunc.
-			 */
-			if (indirdep->ir_state & GOINGAWAY) {
-				FREE_LOCK(&lk);
-				panic("deallocate_dependencies: already gone");
-			}
-			indirdep->ir_state |= GOINGAWAY;
-			while ((aip = LIST_FIRST(&indirdep->ir_deplisthd)))
-				free_allocindir(aip, inodedep);
-			if (bp->b_lblkno >= 0 ||
-			    bp->b_blkno != indirdep->ir_savebp->b_lblkno) {
-				FREE_LOCK(&lk);
-				panic("deallocate_dependencies: not indir");
-			}
-			memcpy(indirdep->ir_savebp->b_data, bp->b_data,
-			    bp->b_bcount);
-			WORKLIST_REMOVE(wk);
-			WORKLIST_INSERT(&indirdep->ir_savebp->b_dep, wk);
-			continue;
-
-		case D_PAGEDEP:
-			pagedep = WK_PAGEDEP(wk);
-			/*
-			 * None of the directory additions will ever be
-			 * visible, so they can simply be tossed.
-			 */
-			for (i = 0; i < DAHASHSZ; i++)
-				while ((dap =
-				    LIST_FIRST(&pagedep->pd_diraddhd[i])))
-					free_diradd(dap);
-			while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)))
-				free_diradd(dap);
-			/*
-			 * Copy any directory remove dependencies to the list
-			 * to be processed after the zero'ed inode is written.
-			 * If the inode has already been written, then they 
-			 * can be dumped directly onto the work list.
-			 */
-			while ((dirrem = LIST_FIRST(&pagedep->pd_dirremhd))) {
-				LIST_REMOVE(dirrem, dm_next);
-				dirrem->dm_dirinum = pagedep->pd_ino;
-				if (inodedep == NULL ||
-				    (inodedep->id_state & ALLCOMPLETE) ==
-				     ALLCOMPLETE)
-					add_to_worklist(&dirrem->dm_list);
-				else
-					WORKLIST_INSERT(&inodedep->id_bufwait,
-					    &dirrem->dm_list);
-			}
-			if ((pagedep->pd_state & NEWBLOCK) != 0) {
-				LIST_FOREACH(wk, &inodedep->id_bufwait, wk_list)
-					if (wk->wk_type == D_NEWDIRBLK &&
-					    WK_NEWDIRBLK(wk)->db_pagedep ==
-					    pagedep)
-						break;
-				if (wk != NULL) {
-					WORKLIST_REMOVE(wk);
-					free_newdirblk(WK_NEWDIRBLK(wk));
-				} else {
-					FREE_LOCK(&lk);
-					panic("deallocate_dependencies: "
-					    "lost pagedep");
-					}
-			}
-			WORKLIST_REMOVE(&pagedep->pd_list);
-			LIST_REMOVE(pagedep, pd_hash);
-			WORKITEM_FREE(pagedep, D_PAGEDEP);
-			continue;
-
-		case D_ALLOCINDIR:
-			free_allocindir(WK_ALLOCINDIR(wk), inodedep);
-			continue;
-
-		case D_ALLOCDIRECT:
-		case D_INODEDEP:
-			FREE_LOCK(&lk);
-			panic("deallocate_dependencies: Unexpected type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-
-		default:
-			FREE_LOCK(&lk);
-			panic("deallocate_dependencies: Unknown type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-}
-
-/*
- * Free an allocdirect. Generate a new freefrag work request if appropriate.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-free_allocdirect(struct allocdirectlst *adphead, struct allocdirect *adp,
-    int delay)
-{
-	struct newdirblk *newdirblk;
-	struct worklist *wk;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("free_allocdirect: lock not held");
-#endif
-	if ((adp->ad_state & DEPCOMPLETE) == 0)
-		LIST_REMOVE(adp, ad_deps);
-	TAILQ_REMOVE(adphead, adp, ad_next);
-	if ((adp->ad_state & COMPLETE) == 0)
-		WORKLIST_REMOVE(&adp->ad_list);
-	if (adp->ad_freefrag != NULL) {
-		if (delay)
-			WORKLIST_INSERT(&adp->ad_inodedep->id_bufwait,
-			    &adp->ad_freefrag->ff_list);
-		else
-			add_to_worklist(&adp->ad_freefrag->ff_list);
-	}
-	if ((wk = LIST_FIRST(&adp->ad_newdirblk)) != NULL) {
-		newdirblk = WK_NEWDIRBLK(wk);
-		WORKLIST_REMOVE(&newdirblk->db_list);
-		if (LIST_FIRST(&adp->ad_newdirblk) != NULL)
-			panic("free_allocdirect: extra newdirblk");
-		if (delay)
-			WORKLIST_INSERT(&adp->ad_inodedep->id_bufwait,
-			    &newdirblk->db_list);
-		else
-			free_newdirblk(newdirblk);
-	}
-	WORKITEM_FREE(adp, D_ALLOCDIRECT);
-}
-
-/*
- * Free a newdirblk. Clear the NEWBLOCK flag on its associated pagedep.
- * This routine must be called with splbio interrupts blocked.
- */
-void
-free_newdirblk(struct newdirblk *newdirblk)
-{
-	struct pagedep *pagedep;
-	struct diradd *dap;
-	int i;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("free_newdirblk: lock not held");
-#endif
-	/*
-	 * If the pagedep is still linked onto the directory buffer
-	 * dependency chain, then some of the entries on the
-	 * pd_pendinghd list may not be committed to disk yet. In
-	 * this case, we will simply clear the NEWBLOCK flag and
-	 * let the pd_pendinghd list be processed when the pagedep
-	 * is next written. If the pagedep is no longer on the buffer
-	 * dependency chain, then all the entries on the pd_pending
-	 * list are committed to disk and we can free them here.
-	 */
-	pagedep = newdirblk->db_pagedep;
-	pagedep->pd_state &= ~NEWBLOCK;
-	if ((pagedep->pd_state & ONWORKLIST) == 0)
-		while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)) != NULL)
-			free_diradd(dap);
-	/*
-	 * If no dependencies remain, the pagedep will be freed.
-	 */
-	for (i = 0; i < DAHASHSZ; i++)
-		if (LIST_FIRST(&pagedep->pd_diraddhd[i]) != NULL)
-			break;
-	if (i == DAHASHSZ && (pagedep->pd_state & ONWORKLIST) == 0) {
-		LIST_REMOVE(pagedep, pd_hash);
-		WORKITEM_FREE(pagedep, D_PAGEDEP);
-	}
-	WORKITEM_FREE(newdirblk, D_NEWDIRBLK);
-}
-
-/*
- * Prepare an inode to be freed. The actual free operation is not
- * done until the zero'ed inode has been written to disk.
- */
-void
-softdep_freefile(struct vnode *pvp, ufsino_t ino, mode_t mode)
-{
-	struct inode *ip = VTOI(pvp);
-	struct inodedep *inodedep;
-	struct freefile *freefile;
-
-	/*
-	 * This sets up the inode de-allocation dependency.
-	 */
-	freefile = pool_get(&freefile_pool, PR_WAITOK);
-	freefile->fx_list.wk_type = D_FREEFILE;
-	freefile->fx_list.wk_state = 0;
-	freefile->fx_mode = mode;
-	freefile->fx_oldinum = ino;
-	freefile->fx_devvp = ip->i_devvp;
-	freefile->fx_mnt = ITOV(ip)->v_mount;
-
-	/*
-	 * If the inodedep does not exist, then the zero'ed inode has
-	 * been written to disk. If the allocated inode has never been
-	 * written to disk, then the on-disk inode is zero'ed. In either
-	 * case we can free the file immediately.
-	 */
-	ACQUIRE_LOCK(&lk);
-	if (inodedep_lookup(ip->i_fs, ino, 0, &inodedep) == 0 ||
-	    check_inode_unwritten(inodedep)) {
-		FREE_LOCK(&lk);
-		handle_workitem_freefile(freefile);
-		return;
-	}
-	WORKLIST_INSERT(&inodedep->id_inowait, &freefile->fx_list);
-	FREE_LOCK(&lk);
-}
-
-/*
- * Check to see if an inode has never been written to disk. If
- * so free the inodedep and return success, otherwise return failure.
- * This routine must be called with splbio interrupts blocked.
- *
- * If we still have a bitmap dependency, then the inode has never
- * been written to disk. Drop the dependency as it is no longer
- * necessary since the inode is being deallocated. We set the
- * ALLCOMPLETE flags since the bitmap now properly shows that the
- * inode is not allocated. Even if the inode is actively being
- * written, it has been rolled back to its zero'ed state, so we
- * are ensured that a zero inode is what is on the disk. For short
- * lived files, this change will usually result in removing all the
- * dependencies from the inode so that it can be freed immediately.
- */
-STATIC int
-check_inode_unwritten(struct inodedep *inodedep)
-{
-	splassert(IPL_BIO);
-
-	if ((inodedep->id_state & DEPCOMPLETE) != 0 ||
-	    LIST_FIRST(&inodedep->id_pendinghd) != NULL ||
-	    LIST_FIRST(&inodedep->id_bufwait) != NULL ||
-	    LIST_FIRST(&inodedep->id_inowait) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL ||
-	    inodedep->id_nlinkdelta != 0)
-		return (0);
-	inodedep->id_state |= ALLCOMPLETE;
-	LIST_REMOVE(inodedep, id_deps);
-	inodedep->id_buf = NULL;
-	if (inodedep->id_state & ONWORKLIST)
-		WORKLIST_REMOVE(&inodedep->id_list);
-	if (inodedep->id_savedino1 != NULL) {
-		free(inodedep->id_savedino1, M_INODEDEP, inodedep->id_unsize);
-		inodedep->id_savedino1 = NULL;
-	}
-	if (free_inodedep(inodedep) == 0) {
-		FREE_LOCK(&lk);
-		panic("check_inode_unwritten: busy inode");
-	}
-	return (1);
-}
-
-/*
- * Try to free an inodedep structure. Return 1 if it could be freed.
- */
-STATIC int
-free_inodedep(struct inodedep *inodedep)
-{
-
-	if ((inodedep->id_state & ONWORKLIST) != 0 ||
-	    (inodedep->id_state & ALLCOMPLETE) != ALLCOMPLETE ||
-	    LIST_FIRST(&inodedep->id_pendinghd) != NULL ||
-	    LIST_FIRST(&inodedep->id_bufwait) != NULL ||
-	    LIST_FIRST(&inodedep->id_inowait) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL ||
-	    inodedep->id_nlinkdelta != 0 || inodedep->id_savedino1 != NULL)
-		return (0);
-	LIST_REMOVE(inodedep, id_hash);
-	WORKITEM_FREE(inodedep, D_INODEDEP);
-	num_inodedep -= 1;
-	return (1);
-}
-
-/*
- * This workitem routine performs the block de-allocation.
- * The workitem is added to the pending list after the updated
- * inode block has been written to disk.  As mentioned above,
- * checks regarding the number of blocks de-allocated (compared
- * to the number of blocks allocated for the file) are also
- * performed in this function.
- */
-STATIC void
-handle_workitem_freeblocks(struct freeblks *freeblks)
-{
-	struct inode tip;
-	daddr_t bn;
-	union {
-		struct ufs1_dinode di1;
-		struct ufs2_dinode di2;
-	} di;
-	struct fs *fs;
-	int i, level, bsize;
-	long nblocks, blocksreleased = 0;
-	int error, allerror = 0;
-	daddr_t baselbns[NIADDR], tmpval;
-
-	if (VFSTOUFS(freeblks->fb_mnt)->um_fstype == UM_UFS1)
-		tip.i_din1 = &di.di1;
-	else
-		tip.i_din2 = &di.di2;
-
-	tip.i_fs = fs = VFSTOUFS(freeblks->fb_mnt)->um_fs;
-	tip.i_number = freeblks->fb_previousinum;
-	tip.i_ump = VFSTOUFS(freeblks->fb_mnt);
-	tip.i_dev = freeblks->fb_devvp->v_rdev;
-	DIP_ASSIGN(&tip, size, freeblks->fb_oldsize);
-	DIP_ASSIGN(&tip, uid, freeblks->fb_uid);
-	tip.i_vnode = NULL;
-	tmpval = 1;
-	baselbns[0] = NDADDR;
-	for (i = 1; i < NIADDR; i++) {
-		tmpval *= NINDIR(fs);
-		baselbns[i] = baselbns[i - 1] + tmpval;
-	}
-	nblocks = btodb(fs->fs_bsize);
-	blocksreleased = 0;
-	/*
-	 * Indirect blocks first.
-	 */
-	for (level = (NIADDR - 1); level >= 0; level--) {
-		if ((bn = freeblks->fb_iblks[level]) == 0)
-			continue;
-		if ((error = indir_trunc(&tip, fsbtodb(fs, bn), level,
-		    baselbns[level], &blocksreleased)) != 0)
-			allerror = error;
-		ffs_blkfree(&tip, bn, fs->fs_bsize);
-		blocksreleased += nblocks;
-	}
-	/*
-	 * All direct blocks or frags.
-	 */
-	for (i = (NDADDR - 1); i >= 0; i--) {
-		if ((bn = freeblks->fb_dblks[i]) == 0)
-			continue;
-		bsize = blksize(fs, &tip, i);
-		ffs_blkfree(&tip, bn, bsize);
-		blocksreleased += btodb(bsize);
-	}
-
-#ifdef DIAGNOSTIC
-	if (freeblks->fb_chkcnt != blocksreleased)
-		printf("handle_workitem_freeblocks: block count\n");
-	if (allerror)
-		softdep_error("handle_workitem_freeblks", allerror);
-#endif /* DIAGNOSTIC */
-	WORKITEM_FREE(freeblks, D_FREEBLKS);
-}
-
-/*
- * Release blocks associated with the inode ip and stored in the indirect
- * block dbn. If level is greater than SINGLE, the block is an indirect block
- * and recursive calls to indirtrunc must be used to cleanse other indirect
- * blocks.
- */
-STATIC int
-indir_trunc(struct inode *ip, daddr_t dbn, int level, daddr_t lbn,
-    long *countp)
-{
-	struct buf *bp;
-	int32_t *bap1 = NULL;
-	int64_t nb, *bap2 = NULL;
-	struct fs *fs;
-	struct worklist *wk;
-	struct indirdep *indirdep;
-	int i, lbnadd, nblocks, ufs1fmt;
-	int error, allerror = 0;
-
-	fs = ip->i_fs;
-	lbnadd = 1;
-	for (i = level; i > 0; i--)
-		lbnadd *= NINDIR(fs);
-	/*
-	 * Get buffer of block pointers to be freed. This routine is not
-	 * called until the zero'ed inode has been written, so it is safe
-	 * to free blocks as they are encountered. Because the inode has
-	 * been zero'ed, calls to bmap on these blocks will fail. So, we
-	 * have to use the on-disk address and the block device for the
-	 * filesystem to look them up. If the file was deleted before its
-	 * indirect blocks were all written to disk, the routine that set
-	 * us up (deallocate_dependencies) will have arranged to leave
-	 * a complete copy of the indirect block in memory for our use.
-	 * Otherwise we have to read the blocks in from the disk.
-	 */
-	ACQUIRE_LOCK(&lk);
-	if ((bp = incore(ip->i_devvp, dbn)) != NULL &&
-	    (wk = LIST_FIRST(&bp->b_dep)) != NULL) {
-		if (wk->wk_type != D_INDIRDEP ||
-		    (indirdep = WK_INDIRDEP(wk))->ir_savebp != bp ||
-		    (indirdep->ir_state & GOINGAWAY) == 0) {
-			FREE_LOCK(&lk);
-			panic("indir_trunc: lost indirdep");
-		}
-		WORKLIST_REMOVE(wk);
-		WORKITEM_FREE(indirdep, D_INDIRDEP);
-		if (LIST_FIRST(&bp->b_dep) != NULL) {
-			FREE_LOCK(&lk);
-			panic("indir_trunc: dangling dep");
-		}
-		FREE_LOCK(&lk);
-	} else {
-		FREE_LOCK(&lk);
-		error = bread(ip->i_devvp, dbn, (int)fs->fs_bsize, &bp);
-		if (error)
-			return (error);
-	}
-	/*
-	 * Recursively free indirect blocks.
-	 */
-	if (ip->i_ump->um_fstype == UM_UFS1) {
-		ufs1fmt = 1;
-		bap1 = (int32_t *)bp->b_data;
-	} else {
-		ufs1fmt = 0;
-		bap2 = (int64_t *)bp->b_data;
-	}
-	nblocks = btodb(fs->fs_bsize);
-	for (i = NINDIR(fs) - 1; i >= 0; i--) {
-		if (ufs1fmt)
-			nb = bap1[i];
-		else
-			nb = bap2[i];
-		if (nb == 0)
-			continue;
-		if (level != 0) {
-			if ((error = indir_trunc(ip, fsbtodb(fs, nb),
-			     level - 1, lbn + (i * lbnadd), countp)) != 0)
-				allerror = error;
-		}
-		ffs_blkfree(ip, nb, fs->fs_bsize);
-		*countp += nblocks;
-	}
-	bp->b_flags |= B_INVAL | B_NOCACHE;
-	brelse(bp);
-	return (allerror);
-}
-
-/*
- * Free an allocindir.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-free_allocindir(struct allocindir *aip, struct inodedep *inodedep)
-{
-	struct freefrag *freefrag;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("free_allocindir: lock not held");
-#endif
-	if ((aip->ai_state & DEPCOMPLETE) == 0)
-		LIST_REMOVE(aip, ai_deps);
-	if (aip->ai_state & ONWORKLIST)
-		WORKLIST_REMOVE(&aip->ai_list);
-	LIST_REMOVE(aip, ai_next);
-	if ((freefrag = aip->ai_freefrag) != NULL) {
-		if (inodedep == NULL)
-			add_to_worklist(&freefrag->ff_list);
-		else
-			WORKLIST_INSERT(&inodedep->id_bufwait,
-			    &freefrag->ff_list);
-	}
-	WORKITEM_FREE(aip, D_ALLOCINDIR);
-}
-
-/*
- * Directory entry addition dependencies.
- * 
- * When adding a new directory entry, the inode (with its incremented link
- * count) must be written to disk before the directory entry's pointer to it.
- * Also, if the inode is newly allocated, the corresponding freemap must be
- * updated (on disk) before the directory entry's pointer. These requirements
- * are met via undo/redo on the directory entry's pointer, which consists
- * simply of the inode number.
- * 
- * As directory entries are added and deleted, the free space within a
- * directory block can become fragmented.  The ufs file system will compact
- * a fragmented directory block to make space for a new entry. When this
- * occurs, the offsets of previously added entries change. Any "diradd"
- * dependency structures corresponding to these entries must be updated with
- * the new offsets.
- */
-
-/*
- * This routine is called after the in-memory inode's link
- * count has been incremented, but before the directory entry's
- * pointer to the inode has been set.
- */
-/* buffer containing directory block */
-/* inode for directory */
-/* offset of new entry in directory */
-/* inode referenced by new directory entry */
-/* non-NULL => contents of new mkdir */
-/* entry is in a newly allocated block */
-int 
-softdep_setup_directory_add(struct buf *bp, struct inode *dp, off_t diroffset,
-    long newinum, struct buf *newdirbp, int isnewblk)
-{
-	int offset;		/* offset of new entry within directory block */
-	daddr_t lbn;		/* block in directory containing new entry */
-	struct fs *fs;
-	struct diradd *dap;
-	struct allocdirect *adp;
-	struct pagedep *pagedep;
-	struct inodedep *inodedep;
-	struct newdirblk *newdirblk = NULL;
-	struct mkdir *mkdir1, *mkdir2;
-	
-
-	fs = dp->i_fs;
-	lbn = lblkno(fs, diroffset);
-	offset = blkoff(fs, diroffset);
-	dap = pool_get(&diradd_pool, PR_WAITOK | PR_ZERO);
-	dap->da_list.wk_type = D_DIRADD;
-	dap->da_offset = offset;
-	dap->da_newinum = newinum;
-	dap->da_state = ATTACHED;
-	if (isnewblk && lbn < NDADDR && fragoff(fs, diroffset) == 0) {
-		newdirblk = pool_get(&newdirblk_pool, PR_WAITOK);
-		newdirblk->db_list.wk_type = D_NEWDIRBLK;
-		newdirblk->db_state = 0;
-	}
-	if (newdirbp == NULL) {
-		dap->da_state |= DEPCOMPLETE;
-		ACQUIRE_LOCK(&lk);
-	} else {
-		dap->da_state |= MKDIR_BODY | MKDIR_PARENT;
-		mkdir1 = pool_get(&mkdir_pool, PR_WAITOK);
-		mkdir1->md_list.wk_type = D_MKDIR;
-		mkdir1->md_state = MKDIR_BODY;
-		mkdir1->md_diradd = dap;
-		mkdir2 = pool_get(&mkdir_pool, PR_WAITOK);
-		mkdir2->md_list.wk_type = D_MKDIR;
-		mkdir2->md_state = MKDIR_PARENT;
-		mkdir2->md_diradd = dap;
-		/*
-		 * Dependency on "." and ".." being written to disk.
-		 */
-		mkdir1->md_buf = newdirbp;
-		ACQUIRE_LOCK(&lk);
-		LIST_INSERT_HEAD(&mkdirlisthd, mkdir1, md_mkdirs);
-		WORKLIST_INSERT(&newdirbp->b_dep, &mkdir1->md_list);
-		FREE_LOCK(&lk);
-		bdwrite(newdirbp);
-		/*
-		 * Dependency on link count increase for parent directory
-		 */
-		ACQUIRE_LOCK(&lk);
-		if (inodedep_lookup(fs, dp->i_number, 0, &inodedep) == 0
-		    || (inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE) {
-			dap->da_state &= ~MKDIR_PARENT;
-			WORKITEM_FREE(mkdir2, D_MKDIR);
-		} else {
-			LIST_INSERT_HEAD(&mkdirlisthd, mkdir2, md_mkdirs);
-			WORKLIST_INSERT(&inodedep->id_bufwait,&mkdir2->md_list);
-		}
-	}
-	/*
-	 * Link into parent directory pagedep to await its being written.
-	 */
-	if (pagedep_lookup(dp, lbn, DEPALLOC, &pagedep) == 0)
-		WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
-	dap->da_pagedep = pagedep;
-	LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(offset)], dap,
-	    da_pdlist);
-	/*
-	 * Link into its inodedep. Put it on the id_bufwait list if the inode
-	 * is not yet written. If it is written, do the post-inode write
-	 * processing to put it on the id_pendinghd list.
-	 */
-	(void) inodedep_lookup(fs, newinum, DEPALLOC, &inodedep);
-	if ((inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE)
-		diradd_inode_written(dap, inodedep);
-	else
-		WORKLIST_INSERT(&inodedep->id_bufwait, &dap->da_list);
-	if (isnewblk) {
-		/*
-		 * Directories growing into indirect blocks are rare
-		 * enough and the frequency of new block allocation
-		 * in those cases even more rare, that we choose not
-		 * to bother tracking them. Rather we simply force the
-		 * new directory entry to disk.
-		 */
-		if (lbn >= NDADDR) {
-			FREE_LOCK(&lk);
-			/*
-			 * We only have a new allocation when at the
-			 * beginning of a new block, not when we are
-			 * expanding into an existing block.
-			 */
-			if (blkoff(fs, diroffset) == 0)
-				return (1);
-			return (0);
-		}
-		/*
-		 * We only have a new allocation when at the beginning
-		 * of a new fragment, not when we are expanding into an
-		 * existing fragment. Also, there is nothing to do if we
-		 * are already tracking this block.
-		 */
-		if (fragoff(fs, diroffset) != 0) {
-			FREE_LOCK(&lk);
-			return (0);
-		}
-			
-		if ((pagedep->pd_state & NEWBLOCK) != 0) {
-			WORKITEM_FREE(newdirblk, D_NEWDIRBLK);
-			FREE_LOCK(&lk);
-			return (0);
-		}
-		/*
-		 * Find our associated allocdirect and have it track us.
-		 */
-		if (inodedep_lookup(fs, dp->i_number, 0, &inodedep) == 0)
-			panic("softdep_setup_directory_add: lost inodedep");
-		adp = TAILQ_LAST(&inodedep->id_newinoupdt, allocdirectlst);
-		if (adp == NULL || adp->ad_lbn != lbn) {
-			FREE_LOCK(&lk);
-			panic("softdep_setup_directory_add: lost entry");
-		}
-		pagedep->pd_state |= NEWBLOCK;
-		newdirblk->db_pagedep = pagedep;
-		WORKLIST_INSERT(&adp->ad_newdirblk, &newdirblk->db_list);
-	}
-	FREE_LOCK(&lk);
-	return (0);
-}
-
-/*
- * This procedure is called to change the offset of a directory
- * entry when compacting a directory block which must be owned
- * exclusively by the caller. Note that the actual entry movement
- * must be done in this procedure to ensure that no I/O completions
- * occur while the move is in progress.
- */
-/* inode for directory */
-/* address of dp->i_offset */
-/* address of old directory location */
-/* address of new directory location */
-/* size of directory entry */
-void 
-softdep_change_directoryentry_offset(struct inode *dp, caddr_t base,
-    caddr_t oldloc, caddr_t newloc, int entrysize)
-{
-	int offset, oldoffset, newoffset;
-	struct pagedep *pagedep;
-	struct diradd *dap;
-	daddr_t lbn;
-
-	ACQUIRE_LOCK(&lk);
-	lbn = lblkno(dp->i_fs, dp->i_offset);
-	offset = blkoff(dp->i_fs, dp->i_offset);
-	if (pagedep_lookup(dp, lbn, 0, &pagedep) == 0)
-		goto done;
-	oldoffset = offset + (oldloc - base);
-	newoffset = offset + (newloc - base);
-
-	LIST_FOREACH(dap, &pagedep->pd_diraddhd[DIRADDHASH(oldoffset)], da_pdlist) {
-		if (dap->da_offset != oldoffset)
-			continue;
-		dap->da_offset = newoffset;
-		if (DIRADDHASH(newoffset) == DIRADDHASH(oldoffset))
-			break;
-		LIST_REMOVE(dap, da_pdlist);
-		LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(newoffset)],
-		    dap, da_pdlist);
-		break;
-	}
-	if (dap == NULL) {
-
-		LIST_FOREACH(dap, &pagedep->pd_pendinghd, da_pdlist) {
-			if (dap->da_offset == oldoffset) {
-				dap->da_offset = newoffset;
-				break;
-			}
-		}
-	}
-done:
-	memmove(newloc, oldloc, entrysize);
-	FREE_LOCK(&lk);
-}
-
-/*
- * Free a diradd dependency structure. This routine must be called
- * with splbio interrupts blocked.
- */
-STATIC void
-free_diradd(struct diradd *dap)
-{
-	struct dirrem *dirrem;
-	struct pagedep *pagedep;
-	struct inodedep *inodedep;
-	struct mkdir *mkdir, *nextmd;
-
-	splassert(IPL_BIO);
-
-#ifdef DEBUG
-	if (lk.lkt_held == -1)
-		panic("free_diradd: lock not held");
-#endif
-	WORKLIST_REMOVE(&dap->da_list);
-	LIST_REMOVE(dap, da_pdlist);
-	if ((dap->da_state & DIRCHG) == 0) {
-		pagedep = dap->da_pagedep;
-	} else {
-		dirrem = dap->da_previous;
-		pagedep = dirrem->dm_pagedep;
-		dirrem->dm_dirinum = pagedep->pd_ino;
-		add_to_worklist(&dirrem->dm_list);
-	}
-	if (inodedep_lookup(VFSTOUFS(pagedep->pd_mnt)->um_fs, dap->da_newinum,
-	    0, &inodedep) != 0)
-		(void) free_inodedep(inodedep);
-	if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) != 0) {
-		for (mkdir = LIST_FIRST(&mkdirlisthd); mkdir; mkdir = nextmd) {
-			nextmd = LIST_NEXT(mkdir, md_mkdirs);
-			if (mkdir->md_diradd != dap)
-				continue;
-			dap->da_state &= ~mkdir->md_state;
-			WORKLIST_REMOVE(&mkdir->md_list);
-			LIST_REMOVE(mkdir, md_mkdirs);
-			WORKITEM_FREE(mkdir, D_MKDIR);
-		}
-		if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) != 0) {
-			FREE_LOCK(&lk);
-			panic("free_diradd: unfound ref");
-		}
-	}
-	WORKITEM_FREE(dap, D_DIRADD);
-}
-
-/*
- * Directory entry removal dependencies.
- * 
- * When removing a directory entry, the entry's inode pointer must be
- * zero'ed on disk before the corresponding inode's link count is decremented
- * (possibly freeing the inode for re-use). This dependency is handled by
- * updating the directory entry but delaying the inode count reduction until
- * after the directory block has been written to disk. After this point, the
- * inode count can be decremented whenever it is convenient.
- */
-
-/*
- * This routine should be called immediately after removing
- * a directory entry.  The inode's link count should not be
- * decremented by the calling procedure -- the soft updates
- * code will do this task when it is safe.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* indicates if doing RMDIR */
-void 
-softdep_setup_remove(struct buf *bp, struct inode *dp, struct inode *ip,
-    int isrmdir)
-{
-	struct dirrem *dirrem, *prevdirrem;
-
-	/*
-	 * Allocate a new dirrem if appropriate and ACQUIRE_LOCK.
-	 */
-	dirrem = newdirrem(bp, dp, ip, isrmdir, &prevdirrem);
-
-	/*
-	 * If the COMPLETE flag is clear, then there were no active
-	 * entries and we want to roll back to a zeroed entry until
-	 * the new inode is committed to disk. If the COMPLETE flag is
-	 * set then we have deleted an entry that never made it to
-	 * disk. If the entry we deleted resulted from a name change,
-	 * then the old name still resides on disk. We cannot delete
-	 * its inode (returned to us in prevdirrem) until the zeroed
-	 * directory entry gets to disk. The new inode has never been
-	 * referenced on the disk, so can be deleted immediately.
-	 */
-	if ((dirrem->dm_state & COMPLETE) == 0) {
-		LIST_INSERT_HEAD(&dirrem->dm_pagedep->pd_dirremhd, dirrem,
-		    dm_next);
-		FREE_LOCK(&lk);
-	} else {
-		if (prevdirrem != NULL)
-			LIST_INSERT_HEAD(&dirrem->dm_pagedep->pd_dirremhd,
-			    prevdirrem, dm_next);
-		dirrem->dm_dirinum = dirrem->dm_pagedep->pd_ino;
-		FREE_LOCK(&lk);
-		handle_workitem_remove(dirrem);
-	}
-}
-
-STATIC long num_dirrem;		/* number of dirrem allocated */
-/*
- * Allocate a new dirrem if appropriate and return it along with
- * its associated pagedep. Called without a lock, returns with lock.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* indicates if doing RMDIR */
-/* previously referenced inode, if any */
-STATIC struct dirrem *
-newdirrem(struct buf *bp, struct inode *dp, struct inode *ip, int isrmdir,
-    struct dirrem **prevdirremp)
-{
-	int offset;
-	daddr_t lbn;
-	struct diradd *dap;
-	struct dirrem *dirrem;
-	struct pagedep *pagedep;
-
-	/*
-	 * Whiteouts have no deletion dependencies.
-	 */
-	if (ip == NULL)
-		panic("newdirrem: whiteout");
-	/*
-	 * If we are over our limit, try to improve the situation.
-	 * Limiting the number of dirrem structures will also limit
-	 * the number of freefile and freeblks structures.
-	 */
-	if (num_dirrem > max_softdeps / 2)
-		(void) request_cleanup(FLUSH_REMOVE, 0);
-	num_dirrem += 1;
-	dirrem = pool_get(&dirrem_pool, PR_WAITOK | PR_ZERO);
-	dirrem->dm_list.wk_type = D_DIRREM;
-	dirrem->dm_state = isrmdir ? RMDIR : 0;
-	dirrem->dm_mnt = ITOV(ip)->v_mount;
-	dirrem->dm_oldinum = ip->i_number;
-	*prevdirremp = NULL;
-
-	ACQUIRE_LOCK(&lk);
-	lbn = lblkno(dp->i_fs, dp->i_offset);
-	offset = blkoff(dp->i_fs, dp->i_offset);
-	if (pagedep_lookup(dp, lbn, DEPALLOC, &pagedep) == 0)
-		WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
-	dirrem->dm_pagedep = pagedep;
-	/*
-	 * Check for a diradd dependency for the same directory entry.
-	 * If present, then both dependencies become obsolete and can
-	 * be de-allocated. Check for an entry on both the pd_dirraddhd
-	 * list and the pd_pendinghd list.
-	 */
-
-	LIST_FOREACH(dap, &pagedep->pd_diraddhd[DIRADDHASH(offset)], da_pdlist)
-		if (dap->da_offset == offset)
-			break;
-	if (dap == NULL) {
-
-		LIST_FOREACH(dap, &pagedep->pd_pendinghd, da_pdlist)
-			if (dap->da_offset == offset)
-				break;
-		if (dap == NULL)
-			return (dirrem);
-	}
-	/*
-	 * Must be ATTACHED at this point.
-	 */
-	if ((dap->da_state & ATTACHED) == 0) {
-		FREE_LOCK(&lk);
-		panic("newdirrem: not ATTACHED");
-	}
-	if (dap->da_newinum != ip->i_number) {
-		FREE_LOCK(&lk);
-		panic("newdirrem: inum %u should be %u",
-		    ip->i_number, dap->da_newinum);
-	}
-	/*
-	 * If we are deleting a changed name that never made it to disk,
-	 * then return the dirrem describing the previous inode (which
-	 * represents the inode currently referenced from this entry on disk).
-	 */
-	if ((dap->da_state & DIRCHG) != 0) {
-		*prevdirremp = dap->da_previous;
-		dap->da_state &= ~DIRCHG;
-		dap->da_pagedep = pagedep;
-	}
-	/*
-	 * We are deleting an entry that never made it to disk.
-	 * Mark it COMPLETE so we can delete its inode immediately.
-	 */
-	dirrem->dm_state |= COMPLETE;
-	free_diradd(dap);
-	return (dirrem);
-}
-
-/*
- * Directory entry change dependencies.
- * 
- * Changing an existing directory entry requires that an add operation
- * be completed first followed by a deletion. The semantics for the addition
- * are identical to the description of adding a new entry above except
- * that the rollback is to the old inode number rather than zero. Once
- * the addition dependency is completed, the removal is done as described
- * in the removal routine above.
- */
-
-/*
- * This routine should be called immediately after changing
- * a directory entry.  The inode's link count should not be
- * decremented by the calling procedure -- the soft updates
- * code will perform this task when it is safe.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* new inode number for changed entry */
-/* indicates if doing RMDIR */
-void 
-softdep_setup_directory_change(struct buf *bp, struct inode *dp,
-    struct inode *ip, long newinum, int isrmdir)
-{
-	int offset;
-	struct diradd *dap;
-	struct dirrem *dirrem, *prevdirrem;
-	struct pagedep *pagedep;
-	struct inodedep *inodedep;
-
-	offset = blkoff(dp->i_fs, dp->i_offset);
-	dap = pool_get(&diradd_pool, PR_WAITOK | PR_ZERO);
-	dap->da_list.wk_type = D_DIRADD;
-	dap->da_state = DIRCHG | ATTACHED | DEPCOMPLETE;
-	dap->da_offset = offset;
-	dap->da_newinum = newinum;
-
-	/*
-	 * Allocate a new dirrem and ACQUIRE_LOCK.
-	 */
-	dirrem = newdirrem(bp, dp, ip, isrmdir, &prevdirrem);
-	pagedep = dirrem->dm_pagedep;
-	/*
-	 * The possible values for isrmdir:
-	 *	0 - non-directory file rename
-	 *	1 - directory rename within same directory
-	 *   inum - directory rename to new directory of given inode number
-	 * When renaming to a new directory, we are both deleting and
-	 * creating a new directory entry, so the link count on the new
-	 * directory should not change. Thus we do not need the followup
-	 * dirrem which is usually done in handle_workitem_remove. We set
-	 * the DIRCHG flag to tell handle_workitem_remove to skip the 
-	 * followup dirrem.
-	 */
-	if (isrmdir > 1)
-		dirrem->dm_state |= DIRCHG;
-
-	/*
-	 * If the COMPLETE flag is clear, then there were no active
-	 * entries and we want to roll back to the previous inode until
-	 * the new inode is committed to disk. If the COMPLETE flag is
-	 * set, then we have deleted an entry that never made it to disk.
-	 * If the entry we deleted resulted from a name change, then the old
-	 * inode reference still resides on disk. Any rollback that we do
-	 * needs to be to that old inode (returned to us in prevdirrem). If
-	 * the entry we deleted resulted from a create, then there is
-	 * no entry on the disk, so we want to roll back to zero rather
-	 * than the uncommitted inode. In either of the COMPLETE cases we
-	 * want to immediately free the unwritten and unreferenced inode.
-	 */
-	if ((dirrem->dm_state & COMPLETE) == 0) {
-		dap->da_previous = dirrem;
-	} else {
-		if (prevdirrem != NULL) {
-			dap->da_previous = prevdirrem;
-		} else {
-			dap->da_state &= ~DIRCHG;
-			dap->da_pagedep = pagedep;
-		}
-		dirrem->dm_dirinum = pagedep->pd_ino;
-		add_to_worklist(&dirrem->dm_list);
-	}
-	/*
-	 * Link into its inodedep. Put it on the id_bufwait list if the inode
-	 * is not yet written. If it is written, do the post-inode write
-	 * processing to put it on the id_pendinghd list.
-	 */
-	if (inodedep_lookup(dp->i_fs, newinum, DEPALLOC, &inodedep) == 0 ||
-	    (inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE) {
-		dap->da_state |= COMPLETE;
-		LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
-		WORKLIST_INSERT(&inodedep->id_pendinghd, &dap->da_list);
-	} else {
-		LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(offset)],
-		    dap, da_pdlist);
-		WORKLIST_INSERT(&inodedep->id_bufwait, &dap->da_list);
-	}
-	FREE_LOCK(&lk);
-}
-
-/*
- * Called whenever the link count on an inode is changed.
- * It creates an inode dependency so that the new reference(s)
- * to the inode cannot be committed to disk until the updated
- * inode has been written.
- */
-/* the inode with the increased link count */
-/* do background work or not */
-void
-softdep_change_linkcnt(struct inode *ip, int nodelay)
-{
-	struct inodedep *inodedep;
-	int flags;
-
-	/*
-	 * If requested, do not allow background work to happen.
-	 */
-	flags = DEPALLOC;
-	if (nodelay)
-		flags |= NODELAY;
-
-	ACQUIRE_LOCK(&lk);
-
-	(void) inodedep_lookup(ip->i_fs, ip->i_number, flags, &inodedep);
-	if (DIP(ip, nlink) < ip->i_effnlink) {
-		FREE_LOCK(&lk);
-		panic("softdep_change_linkcnt: bad delta");
-	}
-
-	inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
-
-	FREE_LOCK(&lk);
-}
-
-/*
- * This workitem decrements the inode's link count.
- * If the link count reaches zero, the file is removed.
- */
-STATIC void 
-handle_workitem_remove(struct dirrem *dirrem)
-{
-	struct proc *p = CURPROC;	/* XXX */
-	struct inodedep *inodedep;
-	struct vnode *vp;
-	struct inode *ip;
-	ufsino_t oldinum;
-	int error;
-
-	if ((error = VFS_VGET(dirrem->dm_mnt, dirrem->dm_oldinum, &vp)) != 0) {
-		softdep_error("handle_workitem_remove: vget", error);
-		return;
-	}
-	ip = VTOI(vp);
-	ACQUIRE_LOCK(&lk);
-	if ((inodedep_lookup(ip->i_fs, dirrem->dm_oldinum, 0, &inodedep)) 
-	    == 0) {
-		FREE_LOCK(&lk);
-		panic("handle_workitem_remove: lost inodedep");
-	}
-	/*
-	 * Normal file deletion.
-	 */
-	if ((dirrem->dm_state & RMDIR) == 0) {
-		DIP_ADD(ip, nlink, -1);
-		ip->i_flag |= IN_CHANGE;
-		if (DIP(ip, nlink) < ip->i_effnlink) {
-			FREE_LOCK(&lk);
-			panic("handle_workitem_remove: bad file delta");
-		}
-		inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
-		FREE_LOCK(&lk);
-		vput(vp);
-		num_dirrem -= 1;
-		WORKITEM_FREE(dirrem, D_DIRREM);
-		return;
-	}
-	/*
-	 * Directory deletion. Decrement reference count for both the
-	 * just deleted parent directory entry and the reference for ".".
-	 * Next truncate the directory to length zero. When the
-	 * truncation completes, arrange to have the reference count on
-	 * the parent decremented to account for the loss of "..".
-	 */
-	DIP_ADD(ip, nlink, -2);
-	ip->i_flag |= IN_CHANGE;
-	if (DIP(ip, nlink) < ip->i_effnlink)
-		panic("handle_workitem_remove: bad dir delta");
-	inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
-	FREE_LOCK(&lk);
-	if ((error = UFS_TRUNCATE(ip, (off_t)0, 0, p->p_ucred)) != 0)
-		softdep_error("handle_workitem_remove: truncate", error);
-	/*
-	 * Rename a directory to a new parent. Since, we are both deleting
-	 * and creating a new directory entry, the link count on the new
-	 * directory should not change. Thus we skip the followup dirrem.
-	 */
-	if (dirrem->dm_state & DIRCHG) {
-		vput(vp);
-		num_dirrem -= 1;
-		WORKITEM_FREE(dirrem, D_DIRREM);
-		return;
-	}
-	/*
-	 * If the inodedep does not exist, then the zero'ed inode has
-	 * been written to disk. If the allocated inode has never been
-	 * written to disk, then the on-disk inode is zero'ed. In either
-	 * case we can remove the file immediately.
-	 */
-	ACQUIRE_LOCK(&lk);
-	dirrem->dm_state = 0;
-	oldinum = dirrem->dm_oldinum;
-	dirrem->dm_oldinum = dirrem->dm_dirinum;
-	if (inodedep_lookup(ip->i_fs, oldinum, 0, &inodedep) == 0 ||
-	    check_inode_unwritten(inodedep)) {
-		FREE_LOCK(&lk);
-		vput(vp);
-		handle_workitem_remove(dirrem);
-		return;
-	}
-	WORKLIST_INSERT(&inodedep->id_inowait, &dirrem->dm_list);
-	FREE_LOCK(&lk);
-	ip->i_flag |= IN_CHANGE;
-	UFS_UPDATE(VTOI(vp), 0);
-	vput(vp);
-}
-
-/*
- * Inode de-allocation dependencies.
- * 
- * When an inode's link count is reduced to zero, it can be de-allocated. We
- * found it convenient to postpone de-allocation until after the inode is
- * written to disk with its new link count (zero).  At this point, all of the
- * on-disk inode's block pointers are nullified and, with careful dependency
- * list ordering, all dependencies related to the inode will be satisfied and
- * the corresponding dependency structures de-allocated.  So, if/when the
- * inode is reused, there will be no mixing of old dependencies with new
- * ones.  This artificial dependency is set up by the block de-allocation
- * procedure above (softdep_setup_freeblocks) and completed by the
- * following procedure.
- */
-STATIC void 
-handle_workitem_freefile(struct freefile *freefile)
-{
-	struct fs *fs;
-	struct vnode vp;
-	struct inode tip;
-#ifdef DEBUG
-	struct inodedep *idp;
-#endif
-	int error;
-
-	fs = VFSTOUFS(freefile->fx_mnt)->um_fs;
-#ifdef DEBUG
-	ACQUIRE_LOCK(&lk);
-	error = inodedep_lookup(fs, freefile->fx_oldinum, 0, &idp);
-	FREE_LOCK(&lk);
-	if (error)
-		panic("handle_workitem_freefile: inodedep survived");
-#endif
-	tip.i_ump = VFSTOUFS(freefile->fx_mnt);
-	tip.i_dev = freefile->fx_devvp->v_rdev;
-	tip.i_fs = fs;
-	tip.i_vnode = &vp;
-	vp.v_data = &tip;
-
-	if ((error = ffs_freefile(&tip, freefile->fx_oldinum, 
-		 freefile->fx_mode)) != 0) {
-		softdep_error("handle_workitem_freefile", error);
-	}
-	WORKITEM_FREE(freefile, D_FREEFILE);
-}
-
-/*
- * Disk writes.
- * 
- * The dependency structures constructed above are most actively used when file
- * system blocks are written to disk.  No constraints are placed on when a
- * block can be written, but unsatisfied update dependencies are made safe by
- * modifying (or replacing) the source memory for the duration of the disk
- * write.  When the disk write completes, the memory block is again brought
- * up-to-date.
- *
- * In-core inode structure reclamation.
- * 
- * Because there are a finite number of "in-core" inode structures, they are
- * reused regularly.  By transferring all inode-related dependencies to the
- * in-memory inode block and indexing them separately (via "inodedep"s), we
- * can allow "in-core" inode structures to be reused at any time and avoid
- * any increase in contention.
- *
- * Called just before entering the device driver to initiate a new disk I/O.
- * The buffer must be locked, thus, no I/O completion operations can occur
- * while we are manipulating its associated dependencies.
- */
-/* structure describing disk write to occur */
-void 
-softdep_disk_io_initiation(struct buf *bp)
-{
-	struct worklist *wk, *nextwk;
-	struct indirdep *indirdep;
-	struct inodedep *inodedep;
-	struct buf *sbp;
-
-	/*
-	 * We only care about write operations. There should never
-	 * be dependencies for reads.
-	 */
-	if (bp->b_flags & B_READ)
-		panic("softdep_disk_io_initiation: read");
-
-	ACQUIRE_LOCK(&lk);
-
-	/*
-	 * Do any necessary pre-I/O processing.
-	 */
-	for (wk = LIST_FIRST(&bp->b_dep); wk; wk = nextwk) {
-		nextwk = LIST_NEXT(wk, wk_list);
-		switch (wk->wk_type) {
-
-		case D_PAGEDEP:
-			initiate_write_filepage(WK_PAGEDEP(wk), bp);
-			continue;
-
-		case D_INODEDEP:
-			inodedep = WK_INODEDEP(wk);
-			if (inodedep->id_fs->fs_magic == FS_UFS1_MAGIC)
-				initiate_write_inodeblock_ufs1(inodedep, bp);
-#ifdef FFS2
-			else
-				initiate_write_inodeblock_ufs2(inodedep, bp);
-#endif
-			continue;
-
-		case D_INDIRDEP:
-			indirdep = WK_INDIRDEP(wk);
-			if (indirdep->ir_state & GOINGAWAY)
-				panic("disk_io_initiation: indirdep gone");
-			/*
-			 * If there are no remaining dependencies, this
-			 * will be writing the real pointers, so the
-			 * dependency can be freed.
-			 */
-			if (LIST_FIRST(&indirdep->ir_deplisthd) == NULL) {
-				sbp = indirdep->ir_savebp;
-				sbp->b_flags |= B_INVAL | B_NOCACHE;
-				/* inline expand WORKLIST_REMOVE(wk); */
-				wk->wk_state &= ~ONWORKLIST;
-				LIST_REMOVE(wk, wk_list);
-				WORKITEM_FREE(indirdep, D_INDIRDEP);
-				FREE_LOCK(&lk);
-				brelse(sbp);
-				ACQUIRE_LOCK(&lk);
-				continue;
-			}
-			/*
-			 * Replace up-to-date version with safe version.
-			 */
-			FREE_LOCK(&lk);
-			indirdep->ir_saveddata = malloc(bp->b_bcount,
-			    M_INDIRDEP, M_WAITOK);
-			ACQUIRE_LOCK(&lk);
-			indirdep->ir_state &= ~ATTACHED;
-			indirdep->ir_state |= UNDONE;
-			memcpy(indirdep->ir_saveddata, bp->b_data, bp->b_bcount);
-			memcpy(bp->b_data, indirdep->ir_savebp->b_data,
-			    bp->b_bcount);
-			continue;
-
-		case D_MKDIR:
-		case D_BMSAFEMAP:
-		case D_ALLOCDIRECT:
-		case D_ALLOCINDIR:
-			continue;
-
-		default:
-			FREE_LOCK(&lk);
-			panic("handle_disk_io_initiation: Unexpected type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-
-	FREE_LOCK(&lk);
-}
-
-/*
- * Called from within the procedure above to deal with unsatisfied
- * allocation dependencies in a directory. The buffer must be locked,
- * thus, no I/O completion operations can occur while we are
- * manipulating its associated dependencies.
- */
-STATIC void
-initiate_write_filepage(struct pagedep *pagedep, struct buf *bp)
-{
-	struct diradd *dap;
-	struct direct *ep;
-	int i;
-
-	if (pagedep->pd_state & IOSTARTED) {
-		/*
-		 * This can only happen if there is a driver that does not
-		 * understand chaining. Here biodone will reissue the call
-		 * to strategy for the incomplete buffers.
-		 */
-		printf("initiate_write_filepage: already started\n");
-		return;
-	}
-	pagedep->pd_state |= IOSTARTED;
-	for (i = 0; i < DAHASHSZ; i++) {
-		LIST_FOREACH(dap, &pagedep->pd_diraddhd[i], da_pdlist) {
-			ep = (struct direct *)
-			    ((char *)bp->b_data + dap->da_offset);
-			if (ep->d_ino != dap->da_newinum) {
-				FREE_LOCK(&lk);
-				panic("%s: dir inum %u != new %u",
-				    "initiate_write_filepage",
-				    ep->d_ino, dap->da_newinum);
-			}
-			if (dap->da_state & DIRCHG)
-				ep->d_ino = dap->da_previous->dm_oldinum;
-			else
-				ep->d_ino = 0;
-			dap->da_state &= ~ATTACHED;
-			dap->da_state |= UNDONE;
-		}
-	}
-}
-
-/*
- * Called from within the procedure above to deal with unsatisfied
- * allocation dependencies in an inodeblock. The buffer must be
- * locked, thus, no I/O completion operations can occur while we
- * are manipulating its associated dependencies.
- */
-/* The inode block */
-STATIC void 
-initiate_write_inodeblock_ufs1(struct inodedep *inodedep, struct buf *bp)
-{
-	struct allocdirect *adp, *lastadp;
-	struct ufs1_dinode *dp;
-	struct fs *fs;
-#ifdef DIAGNOSTIC
-	daddr_t prevlbn = 0;
-	int32_t d1, d2;
-#endif
-	int i, deplist;
-
-	if (inodedep->id_state & IOSTARTED) {
-		FREE_LOCK(&lk);
-		panic("initiate_write_inodeblock: already started");
-	}
-	inodedep->id_state |= IOSTARTED;
-	fs = inodedep->id_fs;
-	dp = (struct ufs1_dinode *)bp->b_data +
-	    ino_to_fsbo(fs, inodedep->id_ino);
-	/*
-	 * If the bitmap is not yet written, then the allocated
-	 * inode cannot be written to disk.
-	 */
-	if ((inodedep->id_state & DEPCOMPLETE) == 0) {
-		if (inodedep->id_savedino1 != NULL) {
-			FREE_LOCK(&lk);
-			panic("initiate_write_inodeblock: already doing I/O");
-		}
-		FREE_LOCK(&lk);
-		inodedep->id_savedino1 = malloc(sizeof(struct ufs1_dinode),
-		    M_INODEDEP, M_WAITOK);
-		inodedep->id_unsize = sizeof(struct ufs1_dinode);
-		ACQUIRE_LOCK(&lk);
-		*inodedep->id_savedino1 = *dp;
-		memset(dp, 0, sizeof(struct ufs1_dinode));
-		return;
-	}
-	/*
-	 * If no dependencies, then there is nothing to roll back.
-	 */
-	inodedep->id_savedsize = dp->di_size;
-	if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
-		return;
-	/*
-	 * Set the dependencies to busy.
-	 */
-	for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
-	     adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
-		if (deplist != 0 && prevlbn >= adp->ad_lbn) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: lbn order");
-		}
-		prevlbn = adp->ad_lbn;
-		if (adp->ad_lbn < NDADDR &&
-		    (d1 = dp->di_db[adp->ad_lbn]) != (d2 = adp->ad_newblkno)) {
-			FREE_LOCK(&lk);
-			panic("%s: direct pointer #%lld mismatch %d != %d",
-			    "softdep_write_inodeblock", (long long)adp->ad_lbn,
-			    d1, d2);
-		}
-		if (adp->ad_lbn >= NDADDR &&
-		    (d1 = dp->di_ib[adp->ad_lbn - NDADDR]) !=
-		    (d2 = adp->ad_newblkno)) {
-			FREE_LOCK(&lk);
-			panic("%s: indirect pointer #%lld mismatch %d != %d",
-			    "softdep_write_inodeblock", (long long)(adp->ad_lbn -
-			    NDADDR), d1, d2);
-		}
-		deplist |= 1 << adp->ad_lbn;
-		if ((adp->ad_state & ATTACHED) == 0) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: Unknown state 0x%x",
-			    adp->ad_state);
-		}
-#endif /* DIAGNOSTIC */
-		adp->ad_state &= ~ATTACHED;
-		adp->ad_state |= UNDONE;
-	}
-	/*
-	 * The on-disk inode cannot claim to be any larger than the last
-	 * fragment that has been written. Otherwise, the on-disk inode
-	 * might have fragments that were not the last block in the file
-	 * which would corrupt the filesystem.
-	 */
-	for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
-	     lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
-		if (adp->ad_lbn >= NDADDR)
-			break;
-		dp->di_db[adp->ad_lbn] = adp->ad_oldblkno;
-		/* keep going until hitting a rollback to a frag */
-		if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
-			continue;
-		dp->di_size = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
-		for (i = adp->ad_lbn + 1; i < NDADDR; i++) {
-#ifdef DIAGNOSTIC
-			if (dp->di_db[i] != 0 && (deplist & (1 << i)) == 0) {
-				FREE_LOCK(&lk);
-				panic("softdep_write_inodeblock: lost dep1");
-			}
-#endif /* DIAGNOSTIC */
-			dp->di_db[i] = 0;
-		}
-		for (i = 0; i < NIADDR; i++) {
-#ifdef DIAGNOSTIC
-			if (dp->di_ib[i] != 0 &&
-			    (deplist & ((1 << NDADDR) << i)) == 0) {
-				FREE_LOCK(&lk);
-				panic("softdep_write_inodeblock: lost dep2");
-			}
-#endif /* DIAGNOSTIC */
-			dp->di_ib[i] = 0;
-		}
-		return;
-	}
-	/*
-	 * If we have zero'ed out the last allocated block of the file,
-	 * roll back the size to the last currently allocated block.
-	 * We know that this last allocated block is a full-sized as
-	 * we already checked for fragments in the loop above.
-	 */
-	if (lastadp != NULL &&
-	    dp->di_size <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
-		for (i = lastadp->ad_lbn; i >= 0; i--)
-			if (dp->di_db[i] != 0)
-				break;
-		dp->di_size = (i + 1) * fs->fs_bsize;
-	}
-	/*
-	 * The only dependencies are for indirect blocks.
-	 *
-	 * The file size for indirect block additions is not guaranteed.
-	 * Such a guarantee would be non-trivial to achieve. The conventional
-	 * synchronous write implementation also does not make this guarantee.
-	 * Fsck should catch and fix discrepancies. Arguably, the file size
-	 * can be over-estimated without destroying integrity when the file
-	 * moves into the indirect blocks (i.e., is large). If we want to
-	 * postpone fsck, we are stuck with this argument.
-	 */
-	for (; adp; adp = TAILQ_NEXT(adp, ad_next))
-		dp->di_ib[adp->ad_lbn - NDADDR] = 0;
-}
-
-#ifdef FFS2
-/*
- * Version of initiate_write_inodeblock that handles FFS2 dinodes.
- */
-/* The inode block */
-STATIC void
-initiate_write_inodeblock_ufs2(struct inodedep *inodedep, struct buf *bp)
-{
-	struct allocdirect *adp, *lastadp;
-	struct ufs2_dinode *dp;
-	struct fs *fs = inodedep->id_fs;
-#ifdef DIAGNOSTIC
-	daddr_t prevlbn = -1, d1, d2;
-#endif
-	int deplist, i;
-
-	if (inodedep->id_state & IOSTARTED)
-		panic("initiate_write_inodeblock_ufs2: already started");
-	inodedep->id_state |= IOSTARTED;
-	fs = inodedep->id_fs;
-	dp = (struct ufs2_dinode *)bp->b_data +
-	    ino_to_fsbo(fs, inodedep->id_ino);
-	/*
-	 * If the bitmap is not yet written, then the allocated
-	 * inode cannot be written to disk.
-	 */
-	if ((inodedep->id_state & DEPCOMPLETE) == 0) {
-		if (inodedep->id_savedino2 != NULL)
-			panic("initiate_write_inodeblock_ufs2: I/O underway");
-		inodedep->id_savedino2 = malloc(sizeof(struct ufs2_dinode),
-		    M_INODEDEP, M_WAITOK);
-		inodedep->id_unsize = sizeof(struct ufs2_dinode);
-		*inodedep->id_savedino2 = *dp;
-		memset(dp, 0, sizeof(struct ufs2_dinode));
-		return;
-	}
-	/*
-	 * If no dependencies, then there is nothing to roll back.
-	 */
-	inodedep->id_savedsize = dp->di_size;
-	if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
-		return;
-
-#ifdef notyet
-	inodedep->id_savedextsize = dp->di_extsize;
-	if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL &&
-	    TAILQ_FIRST(&inodedep->id_extupdt) == NULL)
-		return;
-	/*
-	 * Set the ext data dependencies to busy.
-	 */
-	for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_extupdt); adp;
-	     adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
-		if (deplist != 0 && prevlbn >= adp->ad_lbn) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: lbn order");
-		}
-		prevlbn = adp->ad_lbn;
-		if ((d1 = dp->di_extb[adp->ad_lbn]) !=
-		    (d2 = adp->ad_newblkno)) {
-			FREE_LOCK(&lk);
-			panic("%s: direct pointer #%lld mismatch %lld != %lld",
-			    "softdep_write_inodeblock", (long long)adp->ad_lbn,
-			    d1, d2);
-		}
-		deplist |= 1 << adp->ad_lbn;
-		if ((adp->ad_state & ATTACHED) == 0) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: Unknown state 0x%x",
-			    adp->ad_state);
-		}
-#endif /* DIAGNOSTIC */
-		adp->ad_state &= ~ATTACHED;
-		adp->ad_state |= UNDONE;
-	}
-	/*
-	 * The on-disk inode cannot claim to be any larger than the last
-	 * fragment that has been written. Otherwise, the on-disk inode
-	 * might have fragments that were not the last block in the ext
-	 * data which would corrupt the filesystem.
-	 */
-	for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_extupdt); adp;
-	     lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
-		dp->di_extb[adp->ad_lbn] = adp->ad_oldblkno;
-		/* keep going until hitting a rollback to a frag */
-		if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
-			continue;
-		dp->di_extsize = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
-		for (i = adp->ad_lbn + 1; i < NXADDR; i++) {
-#ifdef DIAGNOSTIC
-			if (dp->di_extb[i] != 0 && (deplist & (1 << i)) == 0) {
-				FREE_LOCK(&lk);
-				panic("softdep_write_inodeblock: lost dep1");
-			}
-#endif /* DIAGNOSTIC */
-			dp->di_extb[i] = 0;
-		}
-		lastadp = NULL;
-		break;
-	}
-	/*
-	 * If we have zero'ed out the last allocated block of the ext
-	 * data, roll back the size to the last currently allocated block.
-	 * We know that this last allocated block is a full-sized as
-	 * we already checked for fragments in the loop above.
-	 */
-	if (lastadp != NULL &&
-	    dp->di_extsize <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
-		for (i = lastadp->ad_lbn; i >= 0; i--)
-			if (dp->di_extb[i] != 0)
-				break;
-		dp->di_extsize = (i + 1) * fs->fs_bsize;
-	}
-#endif /* notyet */
-
-	/*
-	 * Set the file data dependencies to busy.
-	 */
-	for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
-	     adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
-		if (deplist != 0 && prevlbn >= adp->ad_lbn) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: lbn order");
-		}
-		prevlbn = adp->ad_lbn;
-		if (adp->ad_lbn < NDADDR &&
-		    (d1 = dp->di_db[adp->ad_lbn]) != (d2 = adp->ad_newblkno)) {
-			FREE_LOCK(&lk);
-			panic("%s: direct pointer #%lld mismatch %lld != %lld",
-			    "softdep_write_inodeblock", (long long)adp->ad_lbn,
-			    d1, d2);
-		}
-		if (adp->ad_lbn >= NDADDR &&
-		    (d1 = dp->di_ib[adp->ad_lbn - NDADDR]) !=
-		    (d2 = adp->ad_newblkno)) {
-			FREE_LOCK(&lk);
-			panic("%s: indirect pointer #%lld mismatch %lld != %lld",
-			    "softdep_write_inodeblock", (long long)(adp->ad_lbn -
-			    NDADDR), d1, d2);
-		}
-		deplist |= 1 << adp->ad_lbn;
-		if ((adp->ad_state & ATTACHED) == 0) {
-			FREE_LOCK(&lk);
-			panic("softdep_write_inodeblock: Unknown state 0x%x",
-			    adp->ad_state);
-		}
-#endif /* DIAGNOSTIC */
-		adp->ad_state &= ~ATTACHED;
-		adp->ad_state |= UNDONE;
-	}
-	/*
-	 * The on-disk inode cannot claim to be any larger than the last
-	 * fragment that has been written. Otherwise, the on-disk inode
-	 * might have fragments that were not the last block in the file
-	 * which would corrupt the filesystem.
-	 */
-	for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
-	     lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
-		if (adp->ad_lbn >= NDADDR)
-			break;
-		dp->di_db[adp->ad_lbn] = adp->ad_oldblkno;
-		/* keep going until hitting a rollback to a frag */
-		if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
-			continue;
-		dp->di_size = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
-		for (i = adp->ad_lbn + 1; i < NDADDR; i++) {
-#ifdef DIAGNOSTIC
-			if (dp->di_db[i] != 0 && (deplist & (1 << i)) == 0) {
-				FREE_LOCK(&lk);
-				panic("softdep_write_inodeblock: lost dep2");
-			}
-#endif /* DIAGNOSTIC */
-			dp->di_db[i] = 0;
-		}
-		for (i = 0; i < NIADDR; i++) {
-#ifdef DIAGNOSTIC
-			if (dp->di_ib[i] != 0 &&
-			    (deplist & ((1 << NDADDR) << i)) == 0) {
-				FREE_LOCK(&lk);
-				panic("softdep_write_inodeblock: lost dep3");
-			}
-#endif /* DIAGNOSTIC */
-			dp->di_ib[i] = 0;
-		}
-		return;
-	}
-	/*
-	 * If we have zero'ed out the last allocated block of the file,
-	 * roll back the size to the last currently allocated block.
-	 * We know that this last allocated block is a full-sized as
-	 * we already checked for fragments in the loop above.
-	 */
-	if (lastadp != NULL &&
-	    dp->di_size <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
-		for (i = lastadp->ad_lbn; i >= 0; i--)
-			if (dp->di_db[i] != 0)
-				break;
-		dp->di_size = (i + 1) * fs->fs_bsize;
-	}
-	/*
-	 * The only dependencies are for indirect blocks.
-	 *
-	 * The file size for indirect block additions is not guaranteed.
-	 * Such a guarantee would be non-trivial to achieve. The conventional
-	 * synchronous write implementation also does not make this guarantee.
-	 * Fsck should catch and fix discrepancies. Arguably, the file size
-	 * can be over-estimated without destroying integrity when the file
-	 * moves into the indirect blocks (i.e., is large). If we want to
-	 * postpone fsck, we are stuck with this argument.
-	 */
-	for (; adp; adp = TAILQ_NEXT(adp, ad_next))
-		dp->di_ib[adp->ad_lbn - NDADDR] = 0;
-}
-#endif /* FFS2 */
-
-/*
- * This routine is called during the completion interrupt
- * service routine for a disk write (from the procedure called
- * by the device driver to inform the file system caches of
- * a request completion).  It should be called early in this
- * procedure, before the block is made available to other
- * processes or other routines are called.
- */
-/* describes the completed disk write */
-void 
-softdep_disk_write_complete(struct buf *bp)
-{
-	struct worklist *wk;
-	struct workhead reattach;
-	struct newblk *newblk;
-	struct allocindir *aip;
-	struct allocdirect *adp;
-	struct indirdep *indirdep;
-	struct inodedep *inodedep;
-	struct bmsafemap *bmsafemap;
-
-	/*
-	 * If an error occurred while doing the write, then the data
-	 * has not hit the disk and the dependencies cannot be unrolled.
-	 */
-	if ((bp->b_flags & B_ERROR) && !(bp->b_flags & B_INVAL))
-		return;
-
-#ifdef DEBUG
-	if (lk.lkt_held != -1)
-		panic("softdep_disk_write_complete: lock is held");
-	lk.lkt_held = -2;
-#endif
-	LIST_INIT(&reattach);
-	while ((wk = LIST_FIRST(&bp->b_dep)) != NULL) {
-		WORKLIST_REMOVE(wk);
-		switch (wk->wk_type) {
-
-		case D_PAGEDEP:
-			if (handle_written_filepage(WK_PAGEDEP(wk), bp))
-				WORKLIST_INSERT(&reattach, wk);
-			continue;
-
-		case D_INODEDEP:
-			if (handle_written_inodeblock(WK_INODEDEP(wk), bp))
-				WORKLIST_INSERT(&reattach, wk);
-			continue;
-
-		case D_BMSAFEMAP:
-			bmsafemap = WK_BMSAFEMAP(wk);
-			while ((newblk = LIST_FIRST(&bmsafemap->sm_newblkhd))) {
-				newblk->nb_state |= DEPCOMPLETE;
-				newblk->nb_bmsafemap = NULL;
-				LIST_REMOVE(newblk, nb_deps);
-			}
-			while ((adp =
-			   LIST_FIRST(&bmsafemap->sm_allocdirecthd))) {
-				adp->ad_state |= DEPCOMPLETE;
-				adp->ad_buf = NULL;
-				LIST_REMOVE(adp, ad_deps);
-				handle_allocdirect_partdone(adp);
-			}
-			while ((aip =
-			    LIST_FIRST(&bmsafemap->sm_allocindirhd))) {
-				aip->ai_state |= DEPCOMPLETE;
-				aip->ai_buf = NULL;
-				LIST_REMOVE(aip, ai_deps);
-				handle_allocindir_partdone(aip);
-			}
-			while ((inodedep =
-			     LIST_FIRST(&bmsafemap->sm_inodedephd)) != NULL) {
-				inodedep->id_state |= DEPCOMPLETE;
-				LIST_REMOVE(inodedep, id_deps);
-				inodedep->id_buf = NULL;
-			}
-			WORKITEM_FREE(bmsafemap, D_BMSAFEMAP);
-			continue;
-
-		case D_MKDIR:
-			handle_written_mkdir(WK_MKDIR(wk), MKDIR_BODY);
-			continue;
-
-		case D_ALLOCDIRECT:
-			adp = WK_ALLOCDIRECT(wk);
-			adp->ad_state |= COMPLETE;
-			handle_allocdirect_partdone(adp);
-			continue;
-
-		case D_ALLOCINDIR:
-			aip = WK_ALLOCINDIR(wk);
-			aip->ai_state |= COMPLETE;
-			handle_allocindir_partdone(aip);
-			continue;
-
-		case D_INDIRDEP:
-			indirdep = WK_INDIRDEP(wk);
-			if (indirdep->ir_state & GOINGAWAY)
-				panic("disk_write_complete: indirdep gone");
-			memcpy(bp->b_data, indirdep->ir_saveddata, bp->b_bcount);
-			free(indirdep->ir_saveddata, M_INDIRDEP, bp->b_bcount);
-			indirdep->ir_saveddata = NULL;
-			indirdep->ir_state &= ~UNDONE;
-			indirdep->ir_state |= ATTACHED;
-			while ((aip = LIST_FIRST(&indirdep->ir_donehd))) {
-				handle_allocindir_partdone(aip);
-				if (aip == LIST_FIRST(&indirdep->ir_donehd))
-					panic("disk_write_complete: not gone");
-			}
-			WORKLIST_INSERT(&reattach, wk);
-			if ((bp->b_flags & B_DELWRI) == 0)
-				stat_indir_blk_ptrs++;
-			buf_dirty(bp);
-			continue;
-
-		default:
-			panic("handle_disk_write_complete: Unknown type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-	/*
-	 * Reattach any requests that must be redone.
-	 */
-	while ((wk = LIST_FIRST(&reattach)) != NULL) {
-		WORKLIST_REMOVE(wk);
-		WORKLIST_INSERT(&bp->b_dep, wk);
-	}
-#ifdef DEBUG
-	if (lk.lkt_held != -2)
-		panic("softdep_disk_write_complete: lock lost");
-	lk.lkt_held = -1;
-#endif
-}
-
-/*
- * Called from within softdep_disk_write_complete above. Note that
- * this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* the completed allocdirect */
-STATIC void 
-handle_allocdirect_partdone(struct allocdirect *adp)
-{
-	struct allocdirect *listadp;
-	struct inodedep *inodedep;
-	long bsize, delay;
-
-	splassert(IPL_BIO);
-
-	if ((adp->ad_state & ALLCOMPLETE) != ALLCOMPLETE)
-		return;
-	if (adp->ad_buf != NULL)
-		panic("handle_allocdirect_partdone: dangling dep");
-
-	/*
-	 * The on-disk inode cannot claim to be any larger than the last
-	 * fragment that has been written. Otherwise, the on-disk inode
-	 * might have fragments that were not the last block in the file
-	 * which would corrupt the filesystem. Thus, we cannot free any
-	 * allocdirects after one whose ad_oldblkno claims a fragment as
-	 * these blocks must be rolled back to zero before writing the inode.
-	 * We check the currently active set of allocdirects in id_inoupdt.
-	 */
-	inodedep = adp->ad_inodedep;
-	bsize = inodedep->id_fs->fs_bsize;
-	TAILQ_FOREACH(listadp, &inodedep->id_inoupdt, ad_next) {
-		/* found our block */
-		if (listadp == adp)
-			break;
-		/* continue if ad_oldlbn is not a fragment */
-		if (listadp->ad_oldsize == 0 ||
-		    listadp->ad_oldsize == bsize)
-			continue;
-		/* hit a fragment */
-		return;
-	}
-	/*
-	 * If we have reached the end of the current list without
-	 * finding the just finished dependency, then it must be
-	 * on the future dependency list. Future dependencies cannot
-	 * be freed until they are moved to the current list.
-	 */
-	if (listadp == NULL) {
-#ifdef DEBUG
-		TAILQ_FOREACH(listadp, &inodedep->id_newinoupdt, ad_next)
-			/* found our block */
-			if (listadp == adp)
-				break;
-		if (listadp == NULL)
-			panic("handle_allocdirect_partdone: lost dep");
-#endif /* DEBUG */
-		return;
-	}
-	/*
-	 * If we have found the just finished dependency, then free
-	 * it along with anything that follows it that is complete.
-	 * If the inode still has a bitmap dependency, then it has
-	 * never been written to disk, hence the on-disk inode cannot
-	 * reference the old fragment so we can free it without delay.
-	 */
-	delay = (inodedep->id_state & DEPCOMPLETE);
-	for (; adp; adp = listadp) {
-		listadp = TAILQ_NEXT(adp, ad_next);
-		if ((adp->ad_state & ALLCOMPLETE) != ALLCOMPLETE)
-			return;
-		free_allocdirect(&inodedep->id_inoupdt, adp, delay);
-	}
-}
-
-/*
- * Called from within softdep_disk_write_complete above. Note that
- * this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* the completed allocindir */
-STATIC void
-handle_allocindir_partdone(struct allocindir *aip)
-{
-	struct indirdep *indirdep;
-
-	splassert(IPL_BIO);
-
-	if ((aip->ai_state & ALLCOMPLETE) != ALLCOMPLETE)
-		return;
-	if (aip->ai_buf != NULL)
-		panic("handle_allocindir_partdone: dangling dependency");
-	indirdep = aip->ai_indirdep;
-	if (indirdep->ir_state & UNDONE) {
-		LIST_REMOVE(aip, ai_next);
-		LIST_INSERT_HEAD(&indirdep->ir_donehd, aip, ai_next);
-		return;
-	}
-	if (indirdep->ir_state & UFS1FMT)
-		((int32_t *)indirdep->ir_savebp->b_data)[aip->ai_offset] =
-		    aip->ai_newblkno;
-	else
-		((int64_t *)indirdep->ir_savebp->b_data)[aip->ai_offset] =
-		    aip->ai_newblkno;
-	LIST_REMOVE(aip, ai_next);
-	if (aip->ai_freefrag != NULL)
-		add_to_worklist(&aip->ai_freefrag->ff_list);
-	WORKITEM_FREE(aip, D_ALLOCINDIR);
-}
-
-/*
- * Called from within softdep_disk_write_complete above to restore
- * in-memory inode block contents to their most up-to-date state. Note
- * that this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* buffer containing the inode block */
-STATIC int 
-handle_written_inodeblock(struct inodedep *inodedep, struct buf *bp)
-{
-	struct worklist *wk, *filefree;
-	struct allocdirect *adp, *nextadp;
-	struct ufs1_dinode *dp1 = NULL;
-	struct ufs2_dinode *dp2 = NULL;
-	int hadchanges, fstype;
-
-	splassert(IPL_BIO);
-
-	if ((inodedep->id_state & IOSTARTED) == 0)
-		panic("handle_written_inodeblock: not started");
-	inodedep->id_state &= ~IOSTARTED;
-
-	if (inodedep->id_fs->fs_magic == FS_UFS1_MAGIC) {
-		fstype = UM_UFS1;
-		dp1 = (struct ufs1_dinode *) bp->b_data +
-		    ino_to_fsbo(inodedep->id_fs, inodedep->id_ino);
-	} else {
-		fstype = UM_UFS2;
-		dp2 = (struct ufs2_dinode *) bp->b_data +
-		    ino_to_fsbo(inodedep->id_fs, inodedep->id_ino);
-	}
-
-	/*
-	 * If we had to rollback the inode allocation because of
-	 * bitmaps being incomplete, then simply restore it.
-	 * Keep the block dirty so that it will not be reclaimed until
-	 * all associated dependencies have been cleared and the
-	 * corresponding updates written to disk.
-	 */
-	if (inodedep->id_savedino1 != NULL) {
-		if (fstype == UM_UFS1)
-			*dp1 = *inodedep->id_savedino1;
-		else
-			*dp2 = *inodedep->id_savedino2;
-		free(inodedep->id_savedino1, M_INODEDEP, inodedep->id_unsize);
-		inodedep->id_savedino1 = NULL;
-		if ((bp->b_flags & B_DELWRI) == 0)
-			stat_inode_bitmap++;
-		buf_dirty(bp);
-		return (1);
-	}
-	inodedep->id_state |= COMPLETE;
-	/*
-	 * Roll forward anything that had to be rolled back before 
-	 * the inode could be updated.
-	 */
-	hadchanges = 0;
-	for (adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp; adp = nextadp) {
-		nextadp = TAILQ_NEXT(adp, ad_next);
-		if (adp->ad_state & ATTACHED)
-			panic("handle_written_inodeblock: new entry");
-		if (fstype == UM_UFS1) {
-			if (adp->ad_lbn < NDADDR) {
-				if (dp1->di_db[adp->ad_lbn] != adp->ad_oldblkno)
-					 panic("%s: %s #%lld mismatch %d != "
-					     "%lld",
-					     "handle_written_inodeblock",
-					     "direct pointer",
-					     (long long)adp->ad_lbn,
-					     dp1->di_db[adp->ad_lbn],
-					     (long long)adp->ad_oldblkno);
-				dp1->di_db[adp->ad_lbn] = adp->ad_newblkno;
-			} else {
-				if (dp1->di_ib[adp->ad_lbn - NDADDR] != 0)
-					panic("%s: %s #%lld allocated as %d",
-					    "handle_written_inodeblock",
-					    "indirect pointer",
-					    (long long)(adp->ad_lbn - NDADDR),
-					    dp1->di_ib[adp->ad_lbn - NDADDR]);
-				dp1->di_ib[adp->ad_lbn - NDADDR] =
-				   adp->ad_newblkno;
-			}
-		} else {
-			if (adp->ad_lbn < NDADDR) {
-				if (dp2->di_db[adp->ad_lbn] != adp->ad_oldblkno)
-					panic("%s: %s #%lld mismatch %lld != "
-					    "%lld", "handle_written_inodeblock",
-					    "direct pointer",
-					    (long long)adp->ad_lbn,
-					    dp2->di_db[adp->ad_lbn],
-					    (long long)adp->ad_oldblkno);
-				dp2->di_db[adp->ad_lbn] = adp->ad_newblkno;
-			} else {
-				if (dp2->di_ib[adp->ad_lbn - NDADDR] != 0)
-					panic("%s: %s #%lld allocated as %lld",
-					    "handle_written_inodeblock",
-					    "indirect pointer",
-					    (long long)(adp->ad_lbn - NDADDR),
-					    dp2->di_ib[adp->ad_lbn - NDADDR]);
-				dp2->di_ib[adp->ad_lbn - NDADDR] =
-				    adp->ad_newblkno;
-			}
-		}
-		adp->ad_state &= ~UNDONE;
-		adp->ad_state |= ATTACHED;
-		hadchanges = 1;
-	}
-	if (hadchanges && (bp->b_flags & B_DELWRI) == 0)
-		stat_direct_blk_ptrs++;
-	/*
-	 * Reset the file size to its most up-to-date value.
-	 */
-	if (inodedep->id_savedsize == -1)
-		panic("handle_written_inodeblock: bad size");
-	
-	if (fstype == UM_UFS1) {
-		if (dp1->di_size != inodedep->id_savedsize) {
-			dp1->di_size = inodedep->id_savedsize;
-			hadchanges = 1;
-		}
-	} else {
-		if (dp2->di_size != inodedep->id_savedsize) {
-			dp2->di_size = inodedep->id_savedsize;
-			hadchanges = 1;
-		}
-	}
-	inodedep->id_savedsize = -1;
-	/*
-	 * If there were any rollbacks in the inode block, then it must be
-	 * marked dirty so that its will eventually get written back in
-	 * its correct form.
-	 */
-	if (hadchanges)
-		buf_dirty(bp);
-	/*
-	 * Process any allocdirects that completed during the update.
-	 */
-	if ((adp = TAILQ_FIRST(&inodedep->id_inoupdt)) != NULL)
-		handle_allocdirect_partdone(adp);
-	/*
-	 * Process deallocations that were held pending until the
-	 * inode had been written to disk. Freeing of the inode
-	 * is delayed until after all blocks have been freed to
-	 * avoid creation of new <vfsid, inum, lbn> triples
-	 * before the old ones have been deleted.
-	 */
-	filefree = NULL;
-	while ((wk = LIST_FIRST(&inodedep->id_bufwait)) != NULL) {
-		WORKLIST_REMOVE(wk);
-		switch (wk->wk_type) {
-
-		case D_FREEFILE:
-			/*
-			 * We defer adding filefree to the worklist until
-			 * all other additions have been made to ensure
-			 * that it will be done after all the old blocks
-			 * have been freed.
-			 */
-			if (filefree != NULL)
-				panic("handle_written_inodeblock: filefree");
-			filefree = wk;
-			continue;
-
-		case D_MKDIR:
-			handle_written_mkdir(WK_MKDIR(wk), MKDIR_PARENT);
-			continue;
-
-		case D_DIRADD:
-			diradd_inode_written(WK_DIRADD(wk), inodedep);
-			continue;
-
-		case D_FREEBLKS:
-			wk->wk_state |= COMPLETE;
-			if ((wk->wk_state & ALLCOMPLETE) != ALLCOMPLETE)
-				continue;
-			/* FALLTHROUGH */
-		case D_FREEFRAG:
-		case D_DIRREM:
-			add_to_worklist(wk);
-			continue;
-
-		case D_NEWDIRBLK:
-			free_newdirblk(WK_NEWDIRBLK(wk));
-			continue;
-
-		default:
-			panic("handle_written_inodeblock: Unknown type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-	if (filefree != NULL) {
-		if (free_inodedep(inodedep) == 0)
-			panic("handle_written_inodeblock: live inodedep");
-		add_to_worklist(filefree);
-		return (0);
-	}
-
-	/*
-	 * If no outstanding dependencies, free it.
-	 */
-	if (free_inodedep(inodedep) ||
-	    TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
-		return (0);
-	return (hadchanges);
-}
-
-/*
- * Process a diradd entry after its dependent inode has been written.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-diradd_inode_written(struct diradd *dap, struct inodedep *inodedep)
-{
-	struct pagedep *pagedep;
-
-	splassert(IPL_BIO);
-
-	dap->da_state |= COMPLETE;
-	if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
-		if (dap->da_state & DIRCHG)
-			pagedep = dap->da_previous->dm_pagedep;
-		else
-			pagedep = dap->da_pagedep;
-		LIST_REMOVE(dap, da_pdlist);
-		LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
-	}
-	WORKLIST_INSERT(&inodedep->id_pendinghd, &dap->da_list);
-}
-
-/*
- * Handle the completion of a mkdir dependency.
- */
-STATIC void
-handle_written_mkdir(struct mkdir *mkdir, int type)
-{
-	struct diradd *dap;
-	struct pagedep *pagedep;
-
-	splassert(IPL_BIO);
-
-	if (mkdir->md_state != type)
-		panic("handle_written_mkdir: bad type");
-	dap = mkdir->md_diradd;
-	dap->da_state &= ~type;
-	if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) == 0)
-		dap->da_state |= DEPCOMPLETE;
-	if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
-		if (dap->da_state & DIRCHG)
-			pagedep = dap->da_previous->dm_pagedep;
-		else
-			pagedep = dap->da_pagedep;
-		LIST_REMOVE(dap, da_pdlist);
-		LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
-	}
-	LIST_REMOVE(mkdir, md_mkdirs);
-	WORKITEM_FREE(mkdir, D_MKDIR);
-}
-
-/*
- * Called from within softdep_disk_write_complete above.
- * A write operation was just completed. Removed inodes can
- * now be freed and associated block pointers may be committed.
- * Note that this routine is always called from interrupt level
- * with further splbio interrupts blocked.
- */
-/* buffer containing the written page */
-STATIC int 
-handle_written_filepage(struct pagedep *pagedep, struct buf *bp)
-{
-	struct dirrem *dirrem;
-	struct diradd *dap, *nextdap;
-	struct direct *ep;
-	int i, chgs;
-
-	splassert(IPL_BIO);
-
-	if ((pagedep->pd_state & IOSTARTED) == 0)
-		panic("handle_written_filepage: not started");
-	pagedep->pd_state &= ~IOSTARTED;
-	/*
-	 * Process any directory removals that have been committed.
-	 */
-	while ((dirrem = LIST_FIRST(&pagedep->pd_dirremhd)) != NULL) {
-		LIST_REMOVE(dirrem, dm_next);
-		dirrem->dm_dirinum = pagedep->pd_ino;
-		add_to_worklist(&dirrem->dm_list);
-	}
-	/*
-	 * Free any directory additions that have been committed.
-	 * If it is a newly allocated block, we have to wait until
-	 * the on-disk directory inode claims the new block.
-	 */
-	if ((pagedep->pd_state & NEWBLOCK) == 0)
-		while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)) != NULL)
-			free_diradd(dap);
-	/*
-	 * Uncommitted directory entries must be restored.
-	 */
-	for (chgs = 0, i = 0; i < DAHASHSZ; i++) {
-		for (dap = LIST_FIRST(&pagedep->pd_diraddhd[i]); dap;
-		     dap = nextdap) {
-			nextdap = LIST_NEXT(dap, da_pdlist);
-			if (dap->da_state & ATTACHED)
-				panic("handle_written_filepage: attached");
-			ep = (struct direct *)
-			    ((char *)bp->b_data + dap->da_offset);
-			ep->d_ino = dap->da_newinum;
-			dap->da_state &= ~UNDONE;
-			dap->da_state |= ATTACHED;
-			chgs = 1;
-			/*
-			 * If the inode referenced by the directory has
-			 * been written out, then the dependency can be
-			 * moved to the pending list.
-			 */
-			if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
-				LIST_REMOVE(dap, da_pdlist);
-				LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap,
-				    da_pdlist);
-			}
-		}
-	}
-	/*
-	 * If there were any rollbacks in the directory, then it must be
-	 * marked dirty so that its will eventually get written back in
-	 * its correct form.
-	 */
-	if (chgs) {
-		if ((bp->b_flags & B_DELWRI) == 0)
-			stat_dir_entry++;
-		buf_dirty(bp);
-		return (1);
-	}
-	/*
-	 * If we are not waiting for a new directory block to be
-	 * claimed by its inode, then the pagedep will be freed.
-	 * Otherwise it will remain to track any new entries on
-	 * the page in case they are fsync'ed.
-	 */
-	if ((pagedep->pd_state & NEWBLOCK) == 0) {
-		LIST_REMOVE(pagedep, pd_hash);
-		WORKITEM_FREE(pagedep, D_PAGEDEP);
-	}
-	return (0);
-}
-
-/*
- * Writing back in-core inode structures.
- * 
- * The file system only accesses an inode's contents when it occupies an
- * "in-core" inode structure.  These "in-core" structures are separate from
- * the page frames used to cache inode blocks.  Only the latter are
- * transferred to/from the disk.  So, when the updated contents of the
- * "in-core" inode structure are copied to the corresponding in-memory inode
- * block, the dependencies are also transferred.  The following procedure is
- * called when copying a dirty "in-core" inode to a cached inode block.
- */
-
-/*
- * Called when an inode is loaded from disk. If the effective link count
- * differed from the actual link count when it was last flushed, then we
- * need to ensure that the correct effective link count is put back.
- */
-/* the "in_core" copy of the inode */
-void 
-softdep_load_inodeblock(struct inode *ip)
-{
-	struct inodedep *inodedep;
-
-	/*
-	 * Check for alternate nlink count.
-	 */
-	ip->i_effnlink = DIP(ip, nlink);
-	ACQUIRE_LOCK(&lk);
-	if (inodedep_lookup(ip->i_fs, ip->i_number, 0, &inodedep) == 0) {
-		FREE_LOCK(&lk);
-		return;
-	}
-	ip->i_effnlink -= inodedep->id_nlinkdelta;
-	FREE_LOCK(&lk);
-}
-
-/*
- * This routine is called just before the "in-core" inode
- * information is to be copied to the in-memory inode block.
- * Recall that an inode block contains several inodes. If
- * the force flag is set, then the dependencies will be
- * cleared so that the update can always be made. Note that
- * the buffer is locked when this routine is called, so we
- * will never be in the middle of writing the inode block 
- * to disk.
- */
-/* the "in_core" copy of the inode */
-/* the buffer containing the inode block */
-/* nonzero => update must be allowed */
-void 
-softdep_update_inodeblock(struct inode *ip, struct buf *bp, int waitfor)
-{
-	struct inodedep *inodedep;
-	struct worklist *wk;
-	int error, gotit;
-
-	/*
-	 * If the effective link count is not equal to the actual link
-	 * count, then we must track the difference in an inodedep while
-	 * the inode is (potentially) tossed out of the cache. Otherwise,
-	 * if there is no existing inodedep, then there are no dependencies
-	 * to track.
-	 */
-	ACQUIRE_LOCK(&lk);
-	if (inodedep_lookup(ip->i_fs, ip->i_number, 0, &inodedep) == 0) {
-		FREE_LOCK(&lk);
-		if (ip->i_effnlink != DIP(ip, nlink))
-			panic("softdep_update_inodeblock: bad link count");
-		return;
-	}
-	if (inodedep->id_nlinkdelta != DIP(ip, nlink) - ip->i_effnlink) {
-		FREE_LOCK(&lk);
-		panic("softdep_update_inodeblock: bad delta");
-	}
-	/*
-	 * Changes have been initiated. Anything depending on these
-	 * changes cannot occur until this inode has been written.
-	 */
-	inodedep->id_state &= ~COMPLETE;
-	if ((inodedep->id_state & ONWORKLIST) == 0)
-		WORKLIST_INSERT(&bp->b_dep, &inodedep->id_list);
-	/*
-	 * Any new dependencies associated with the incore inode must 
-	 * now be moved to the list associated with the buffer holding
-	 * the in-memory copy of the inode. Once merged process any
-	 * allocdirects that are completed by the merger.
-	 */
-	merge_inode_lists(inodedep);
-	if (TAILQ_FIRST(&inodedep->id_inoupdt) != NULL)
-		handle_allocdirect_partdone(TAILQ_FIRST(&inodedep->id_inoupdt));
-	/*
-	 * Now that the inode has been pushed into the buffer, the
-	 * operations dependent on the inode being written to disk
-	 * can be moved to the id_bufwait so that they will be
-	 * processed when the buffer I/O completes.
-	 */
-	while ((wk = LIST_FIRST(&inodedep->id_inowait)) != NULL) {
-		WORKLIST_REMOVE(wk);
-		WORKLIST_INSERT(&inodedep->id_bufwait, wk);
-	}
-	/*
-	 * Newly allocated inodes cannot be written until the bitmap
-	 * that allocates them have been written (indicated by
-	 * DEPCOMPLETE being set in id_state). If we are doing a
-	 * forced sync (e.g., an fsync on a file), we force the bitmap
-	 * to be written so that the update can be done.
-	 */
-	do {
-		if ((inodedep->id_state & DEPCOMPLETE) != 0 || waitfor == 0) {
-			FREE_LOCK(&lk);
-			return;
-		}
-		bp = inodedep->id_buf;
-		gotit = getdirtybuf(bp, MNT_WAIT);
-	} while (gotit == -1);
-	FREE_LOCK(&lk);
-	if (gotit && (error = bwrite(bp)) != 0)
-		softdep_error("softdep_update_inodeblock: bwrite", error);
-	if ((inodedep->id_state & DEPCOMPLETE) == 0)
-		panic("softdep_update_inodeblock: update failed");
-}
-
-/*
- * Merge the new inode dependency list (id_newinoupdt) into the old
- * inode dependency list (id_inoupdt). This routine must be called
- * with splbio interrupts blocked.
- */
-STATIC void
-merge_inode_lists(struct inodedep *inodedep)
-{
-	struct allocdirect *listadp, *newadp;
-
-	splassert(IPL_BIO);
-
-	newadp = TAILQ_FIRST(&inodedep->id_newinoupdt);
-	for (listadp = TAILQ_FIRST(&inodedep->id_inoupdt); listadp && newadp;) {
-		if (listadp->ad_lbn < newadp->ad_lbn) {
-			listadp = TAILQ_NEXT(listadp, ad_next);
-			continue;
-		}
-		TAILQ_REMOVE(&inodedep->id_newinoupdt, newadp, ad_next);
-		TAILQ_INSERT_BEFORE(listadp, newadp, ad_next);
-		if (listadp->ad_lbn == newadp->ad_lbn) {
-			allocdirect_merge(&inodedep->id_inoupdt, newadp,
-			    listadp);
-			listadp = newadp;
-		}
-		newadp = TAILQ_FIRST(&inodedep->id_newinoupdt);
-	}
-	TAILQ_CONCAT(&inodedep->id_inoupdt, &inodedep->id_newinoupdt, ad_next);
-}
-
-/*
- * If we are doing an fsync, then we must ensure that any directory
- * entries for the inode have been written after the inode gets to disk.
- */
-/* the "in_core" copy of the inode */
-int
-softdep_fsync(struct vnode *vp)
-{
-	struct inodedep *inodedep;
-	struct pagedep *pagedep;
-	struct worklist *wk;
-	struct diradd *dap;
-	struct mount *mnt;
-	struct vnode *pvp;
-	struct inode *ip;
-	struct inode *pip;
-	struct buf *bp;
-	struct fs *fs;
-	struct proc *p = CURPROC;		/* XXX */
-	int error, flushparent;
-	ufsino_t parentino;
-	daddr_t lbn;
-
-	ip = VTOI(vp);
-	fs = ip->i_fs;
-	ACQUIRE_LOCK(&lk);
-	if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) == 0) {
-		FREE_LOCK(&lk);
-		return (0);
-	}
-	if (LIST_FIRST(&inodedep->id_inowait) != NULL ||
-	    LIST_FIRST(&inodedep->id_bufwait) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
-	    TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL) {
-		FREE_LOCK(&lk);
-		panic("softdep_fsync: pending ops");
-	}
-	for (error = 0, flushparent = 0; ; ) {
-		if ((wk = LIST_FIRST(&inodedep->id_pendinghd)) == NULL)
-			break;
-		if (wk->wk_type != D_DIRADD) {
-			FREE_LOCK(&lk);
-			panic("softdep_fsync: Unexpected type %s",
-			    TYPENAME(wk->wk_type));
-		}
-		dap = WK_DIRADD(wk);
-		/*
-		 * Flush our parent if this directory entry has a MKDIR_PARENT
-		 * dependency or is contained in a newly allocated block.
-		 */
-		if (dap->da_state & DIRCHG)
-			pagedep = dap->da_previous->dm_pagedep;
-		else
-			pagedep = dap->da_pagedep;
-		mnt = pagedep->pd_mnt;
-		parentino = pagedep->pd_ino;
-		lbn = pagedep->pd_lbn;
-		if ((dap->da_state & (MKDIR_BODY | COMPLETE)) != COMPLETE) {
-			FREE_LOCK(&lk);
-			panic("softdep_fsync: dirty");
-		}
-		if ((dap->da_state & MKDIR_PARENT) ||
-		    (pagedep->pd_state & NEWBLOCK))
-			flushparent = 1;
-		else
-			flushparent = 0;
-		/*
-		 * If we are being fsync'ed as part of vgone'ing this vnode,
-		 * then we will not be able to release and recover the
-		 * vnode below, so we just have to give up on writing its
-		 * directory entry out. It will eventually be written, just
-		 * not now, but then the user was not asking to have it
-		 * written, so we are not breaking any promises.
-		 */
-		mtx_enter(&vnode_mtx);
-		if (vp->v_lflag & VXLOCK) {
-			mtx_leave(&vnode_mtx);
-			break;
-		}
-		mtx_leave(&vnode_mtx);
-		/*
-		 * We prevent deadlock by always fetching inodes from the
-		 * root, moving down the directory tree. Thus, when fetching
-		 * our parent directory, we must unlock ourselves before
-		 * requesting the lock on our parent. See the comment in
-		 * ufs_lookup for details on possible races.
-		 */
-		FREE_LOCK(&lk);
-		VOP_UNLOCK(vp);
-		error = VFS_VGET(mnt, parentino, &pvp);
-		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
-		if (error != 0)
-			return (error);
-		/*
-		 * All MKDIR_PARENT dependencies and all the NEWBLOCK pagedeps
-		 * that are contained in direct blocks will be resolved by 
-		 * doing a UFS_UPDATE. Pagedeps contained in indirect blocks
-		 * may require a complete sync'ing of the directory. So, we
-		 * try the cheap and fast UFS_UPDATE first, and if that fails,
-		 * then we do the slower VOP_FSYNC of the directory.
-		 */
-		pip = VTOI(pvp);
-		if (flushparent) {
-			error = UFS_UPDATE(pip, 1);
-			if (error) {
-				vput(pvp);
-				return (error);
-			}
-			if (pagedep->pd_state & NEWBLOCK) {
-				error = VOP_FSYNC(pvp, p->p_ucred, MNT_WAIT, p);
-				if (error) {
-					vput(pvp);
-					return (error);
-				}
-			}
-		}
-		/*
-		 * Flush directory page containing the inode's name.
-		 */
-		error = bread(pvp, lbn, fs->fs_bsize, &bp);
-		if (error == 0) {
-			bp->b_bcount = blksize(fs, pip, lbn);
-			error = bwrite(bp);
-		} else
-			brelse(bp);
-		vput(pvp);
-		if (error != 0)
-			return (error);
-		ACQUIRE_LOCK(&lk);
-		if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) == 0)
-			break;
-	}
-	FREE_LOCK(&lk);
-	return (0);
-}
-
-/*
- * Flush all the dirty bitmaps associated with the block device
- * before flushing the rest of the dirty blocks so as to reduce
- * the number of dependencies that will have to be rolled back.
- */
-void
-softdep_fsync_mountdev(struct vnode *vp, int waitfor)
-{
-	struct buf *bp, *nbp;
-	struct worklist *wk;
-
-	if (!vn_isdisk(vp, NULL))
-		panic("softdep_fsync_mountdev: vnode not a disk");
-	ACQUIRE_LOCK(&lk);
-	LIST_FOREACH_SAFE(bp, &vp->v_dirtyblkhd, b_vnbufs, nbp) {
-		/* 
-		 * If it is already scheduled, skip to the next buffer.
-		 */
-		splassert(IPL_BIO);
-		if (bp->b_flags & B_BUSY)
-			continue;
-
-		if ((bp->b_flags & B_DELWRI) == 0) {
-			FREE_LOCK(&lk);
-			panic("softdep_fsync_mountdev: not dirty");
-		}
-		/*
-		 * We are only interested in bitmaps with outstanding
-		 * dependencies.
-		 */
-		if ((wk = LIST_FIRST(&bp->b_dep)) == NULL ||
-		    wk->wk_type != D_BMSAFEMAP) {
-			continue;
-		}
-		bremfree(bp);
-		buf_acquire(bp);
-		FREE_LOCK(&lk);
-		(void) bawrite(bp);
-		ACQUIRE_LOCK(&lk);
-		/*
-		 * Since we may have slept during the I/O, we need 
-		 * to start from a known point.
-		 */
-		nbp = LIST_FIRST(&vp->v_dirtyblkhd);
-	}
-	if (waitfor == MNT_WAIT)
-		drain_output(vp, 1);
-	FREE_LOCK(&lk);
-}
-
-/*
- * This routine is called when we are trying to synchronously flush a
- * file. This routine must eliminate any filesystem metadata dependencies
- * so that the syncing routine can succeed by pushing the dirty blocks
- * associated with the file. If any I/O errors occur, they are returned.
- */
-int
-softdep_sync_metadata(struct vop_fsync_args *ap)
-{
-	struct vnode *vp = ap->a_vp;
-	struct pagedep *pagedep;
-	struct allocdirect *adp;
-	struct allocindir *aip;
-	struct buf *bp, *nbp;
-	struct worklist *wk;
-	int i, gotit, error, waitfor;
-
-	/*
-	 * Check whether this vnode is involved in a filesystem
-	 * that is doing soft dependency processing.
-	 */
-	if (!vn_isdisk(vp, NULL)) {
-		if (!DOINGSOFTDEP(vp))
-			return (0);
-	} else
-		if (vp->v_specmountpoint == NULL ||
-		    (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP) == 0)
-			return (0);
-	/*
-	 * Ensure that any direct block dependencies have been cleared.
-	 */
-	ACQUIRE_LOCK(&lk);
-	if ((error = flush_inodedep_deps(VTOI(vp)->i_fs, VTOI(vp)->i_number))) {
-		FREE_LOCK(&lk);
-		return (error);
-	}
-	/*
-	 * For most files, the only metadata dependencies are the
-	 * cylinder group maps that allocate their inode or blocks.
-	 * The block allocation dependencies can be found by traversing
-	 * the dependency lists for any buffers that remain on their
-	 * dirty buffer list. The inode allocation dependency will
-	 * be resolved when the inode is updated with MNT_WAIT.
-	 * This work is done in two passes. The first pass grabs most
-	 * of the buffers and begins asynchronously writing them. The
-	 * only way to wait for these asynchronous writes is to sleep
-	 * on the filesystem vnode which may stay busy for a long time
-	 * if the filesystem is active. So, instead, we make a second
-	 * pass over the dependencies blocking on each write. In the
-	 * usual case we will be blocking against a write that we
-	 * initiated, so when it is done the dependency will have been
-	 * resolved. Thus the second pass is expected to end quickly.
-	 */
-	waitfor = MNT_NOWAIT;
-top:
-	/*
-	 * We must wait for any I/O in progress to finish so that
-	 * all potential buffers on the dirty list will be visible.
-	 */
-	drain_output(vp, 1);
-	bp = LIST_FIRST(&vp->v_dirtyblkhd);
-	gotit = getdirtybuf(bp, MNT_WAIT);
-	if (gotit == 0) {
-		FREE_LOCK(&lk);
-		return (0);
-	} else if (gotit == -1)
-		goto top;
-loop:
-	/*
-	 * As we hold the buffer locked, none of its dependencies
-	 * will disappear.
-	 */
-	LIST_FOREACH(wk, &bp->b_dep, wk_list) {
-		switch (wk->wk_type) {
-
-		case D_ALLOCDIRECT:
-			adp = WK_ALLOCDIRECT(wk);
-			if (adp->ad_state & DEPCOMPLETE)
-				break;
-			nbp = adp->ad_buf;
-			gotit = getdirtybuf(nbp, waitfor);
-			if (gotit == 0)
-				break;
-			else if (gotit == -1)
-				goto loop;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(nbp);
-			} else if ((error = VOP_BWRITE(nbp)) != 0) {
-				bawrite(bp);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-
-		case D_ALLOCINDIR:
-			aip = WK_ALLOCINDIR(wk);
-			if (aip->ai_state & DEPCOMPLETE)
-				break;
-			nbp = aip->ai_buf;
-			gotit = getdirtybuf(nbp, waitfor);
-			if (gotit == 0)
-				break;
-			else if (gotit == -1)
-				goto loop;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(nbp);
-			} else if ((error = VOP_BWRITE(nbp)) != 0) {
-				bawrite(bp);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-
-		case D_INDIRDEP:
-		restart:
-
-			LIST_FOREACH(aip, &WK_INDIRDEP(wk)->ir_deplisthd, ai_next) {
-				if (aip->ai_state & DEPCOMPLETE)
-					continue;
-				nbp = aip->ai_buf;
-				if (getdirtybuf(nbp, MNT_WAIT) <= 0)
-					goto restart;
-				FREE_LOCK(&lk);
-				if ((error = VOP_BWRITE(nbp)) != 0) {
-					bawrite(bp);
-					return (error);
-				}
-				ACQUIRE_LOCK(&lk);
-				goto restart;
-			}
-			break;
-
-		case D_INODEDEP:
-			if ((error = flush_inodedep_deps(WK_INODEDEP(wk)->id_fs,
-			    WK_INODEDEP(wk)->id_ino)) != 0) {
-				FREE_LOCK(&lk);
-				bawrite(bp);
-				return (error);
-			}
-			break;
-
-		case D_PAGEDEP:
-			/*
-			 * We are trying to sync a directory that may
-			 * have dependencies on both its own metadata
-			 * and/or dependencies on the inodes of any
-			 * recently allocated files. We walk its diradd
-			 * lists pushing out the associated inode.
-			 */
-			pagedep = WK_PAGEDEP(wk);
-			for (i = 0; i < DAHASHSZ; i++) {
-				if (LIST_FIRST(&pagedep->pd_diraddhd[i]) ==
-				    NULL)
-					continue;
-				if ((error =
-				    flush_pagedep_deps(vp, pagedep->pd_mnt,
-						&pagedep->pd_diraddhd[i]))) {
-					FREE_LOCK(&lk);
-					bawrite(bp);
-					return (error);
-				}
-			}
-			break;
-
-		case D_MKDIR:
-			/*
-			 * This case should never happen if the vnode has
-			 * been properly sync'ed. However, if this function
-			 * is used at a place where the vnode has not yet
-			 * been sync'ed, this dependency can show up. So,
-			 * rather than panic, just flush it.
-			 */
-			nbp = WK_MKDIR(wk)->md_buf;
-			KASSERT(bp != nbp);
-			gotit = getdirtybuf(nbp, waitfor);
-			if (gotit == 0)
-				break;
-			else if (gotit == -1)
-				goto loop;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(nbp);
-			} else if ((error = VOP_BWRITE(nbp)) != 0) {
-				bawrite(bp);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-
-		case D_BMSAFEMAP:
-			/*
-			 * This case should never happen if the vnode has
-			 * been properly sync'ed. However, if this function
-			 * is used at a place where the vnode has not yet
-			 * been sync'ed, this dependency can show up. So,
-			 * rather than panic, just flush it.
-			 */
-			nbp = WK_BMSAFEMAP(wk)->sm_buf;
-			if (bp == nbp)
-				break;
-			gotit = getdirtybuf(nbp, waitfor);
-			if (gotit == 0)
-				break;
-			else if (gotit == -1)
-				goto loop;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(nbp);
-			} else if ((error = VOP_BWRITE(nbp)) != 0) {
-				bawrite(bp);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-
-		default:
-			FREE_LOCK(&lk);
-			panic("softdep_sync_metadata: Unknown type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-	do {
-		nbp = LIST_NEXT(bp, b_vnbufs);
-		gotit = getdirtybuf(nbp, MNT_WAIT);
-	} while (gotit == -1);
-	FREE_LOCK(&lk);
-	bawrite(bp);
-	ACQUIRE_LOCK(&lk);
-	if (nbp != NULL) {
-		bp = nbp;
-		goto loop;
-	}
-	/*
-	 * The brief unlock is to allow any pent up dependency
-	 * processing to be done. Then proceed with the second pass.
-	 */
-	if (waitfor == MNT_NOWAIT) {
-		waitfor = MNT_WAIT;
-		FREE_LOCK(&lk);
-		ACQUIRE_LOCK(&lk);
-		goto top;
-	}
-
-	/*
-	 * If we have managed to get rid of all the dirty buffers,
-	 * then we are done. For certain directories and block
-	 * devices, we may need to do further work.
-	 *
-	 * We must wait for any I/O in progress to finish so that
-	 * all potential buffers on the dirty list will be visible.
-	 */
-	drain_output(vp, 1);
-	if (LIST_EMPTY(&vp->v_dirtyblkhd)) {
-		FREE_LOCK(&lk);
-		return (0);
-	}
-
-	FREE_LOCK(&lk);
-	/*
-	 * If we are trying to sync a block device, some of its buffers may
-	 * contain metadata that cannot be written until the contents of some
-	 * partially written files have been written to disk. The only easy
-	 * way to accomplish this is to sync the entire filesystem (luckily
-	 * this happens rarely).
-	 */
-	if (vn_isdisk(vp, NULL) &&
-	    vp->v_specmountpoint && !VOP_ISLOCKED(vp) &&
-	    (error = VFS_SYNC(vp->v_specmountpoint, MNT_WAIT, 0, ap->a_cred,
-	     ap->a_p)) != 0)
-		return (error);
-	return (0);
-}
-
-/*
- * Flush the dependencies associated with an inodedep.
- * Called with splbio blocked.
- */
-STATIC int
-flush_inodedep_deps(struct fs *fs, ufsino_t ino)
-{
-	struct inodedep *inodedep;
-	struct allocdirect *adp;
-	int gotit, error, waitfor;
-	struct buf *bp;
-
-	splassert(IPL_BIO);
-
-	/*
-	 * This work is done in two passes. The first pass grabs most
-	 * of the buffers and begins asynchronously writing them. The
-	 * only way to wait for these asynchronous writes is to sleep
-	 * on the filesystem vnode which may stay busy for a long time
-	 * if the filesystem is active. So, instead, we make a second
-	 * pass over the dependencies blocking on each write. In the
-	 * usual case we will be blocking against a write that we
-	 * initiated, so when it is done the dependency will have been
-	 * resolved. Thus the second pass is expected to end quickly.
-	 * We give a brief window at the top of the loop to allow
-	 * any pending I/O to complete.
-	 */
-	for (waitfor = MNT_NOWAIT; ; ) {
-	retry_ino:
-		FREE_LOCK(&lk);
-		ACQUIRE_LOCK(&lk);
-		if (inodedep_lookup(fs, ino, 0, &inodedep) == 0)
-			return (0);
-		TAILQ_FOREACH(adp, &inodedep->id_inoupdt, ad_next) {
-			if (adp->ad_state & DEPCOMPLETE)
-				continue;
-			bp = adp->ad_buf;
-			gotit = getdirtybuf(bp, waitfor);
-			if (gotit == 0) {
-				if (waitfor == MNT_NOWAIT)
-					continue;
-				break;
-			} else if (gotit == -1)
-				goto retry_ino;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(bp);
-			} else if ((error = VOP_BWRITE(bp)) != 0) {
-				ACQUIRE_LOCK(&lk);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-		}
-		if (adp != NULL)
-			continue;
-	retry_newino:
-		TAILQ_FOREACH(adp, &inodedep->id_newinoupdt, ad_next) {
-			if (adp->ad_state & DEPCOMPLETE)
-				continue;
-			bp = adp->ad_buf;
-			gotit = getdirtybuf(bp, waitfor);
-			if (gotit == 0) {
-				if (waitfor == MNT_NOWAIT)
-					continue;
-				break;
-			} else if (gotit == -1)
-				goto retry_newino;
-			FREE_LOCK(&lk);
-			if (waitfor == MNT_NOWAIT) {
-				bawrite(bp);
-			} else if ((error = VOP_BWRITE(bp)) != 0) {
-				ACQUIRE_LOCK(&lk);
-				return (error);
-			}
-			ACQUIRE_LOCK(&lk);
-			break;
-		}
-		if (adp != NULL)
-			continue;
-		/*
-		 * If pass2, we are done, otherwise do pass 2.
-		 */
-		if (waitfor == MNT_WAIT)
-			break;
-		waitfor = MNT_WAIT;
-	}
-	/*
-	 * Try freeing inodedep in case all dependencies have been removed.
-	 */
-	if (inodedep_lookup(fs, ino, 0, &inodedep) != 0)
-		(void) free_inodedep(inodedep);
-	return (0);
-}
-
-/*
- * Eliminate a pagedep dependency by flushing out all its diradd dependencies.
- * Called with splbio blocked.
- */
-STATIC int
-flush_pagedep_deps(struct vnode *pvp, struct mount *mp,
-    struct diraddhd *diraddhdp)
-{
-	struct proc *p = CURPROC;	/* XXX */
-	struct worklist *wk;
-	struct inodedep *inodedep;
-	struct ufsmount *ump;
-	struct diradd *dap;
-	struct vnode *vp;
-	int gotit, error = 0;
-	struct buf *bp;
-	ufsino_t inum;
-
-	splassert(IPL_BIO);
-
-	ump = VFSTOUFS(mp);
-	while ((dap = LIST_FIRST(diraddhdp)) != NULL) {
-		/*
-		 * Flush ourselves if this directory entry
-		 * has a MKDIR_PARENT dependency.
-		 */
-		if (dap->da_state & MKDIR_PARENT) {
-			FREE_LOCK(&lk);
-			if ((error = UFS_UPDATE(VTOI(pvp), 1)))
-				break;
-			ACQUIRE_LOCK(&lk);
-			/*
-			 * If that cleared dependencies, go on to next.
-			 */
-			if (dap != LIST_FIRST(diraddhdp))
-				continue;
-			if (dap->da_state & MKDIR_PARENT) {
-				FREE_LOCK(&lk);
-				panic("flush_pagedep_deps: MKDIR_PARENT");
-			}
-		}
-		/*
-		 * A newly allocated directory must have its "." and
-		 * ".." entries written out before its name can be
-		 * committed in its parent. We do not want or need
-		 * the full semantics of a synchronous VOP_FSYNC as
-		 * that may end up here again, once for each directory
-		 * level in the filesystem. Instead, we push the blocks
-		 * and wait for them to clear. We have to fsync twice
-		 * because the first call may choose to defer blocks
-		 * that still have dependencies, but deferral will
-		 * happen at most once.
-		 */
-		inum = dap->da_newinum;
-		if (dap->da_state & MKDIR_BODY) {
-			FREE_LOCK(&lk);
-			if ((error = VFS_VGET(mp, inum, &vp)) != 0)
-				break;
-			if ((error=VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)) ||
-			    (error=VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p))) {
-				vput(vp);
-				break;
-			}
-			drain_output(vp, 0);
-			/*
-			 * If first block is still dirty with a D_MKDIR
-			 * dependency then it needs to be written now.
-			 */
-			for (;;) {
-				error = 0;
-				ACQUIRE_LOCK(&lk);
-				bp = incore(vp, 0);
-				if (bp == NULL) {
-					FREE_LOCK(&lk);
-					break;
-				}
-				LIST_FOREACH(wk, &bp->b_dep, wk_list)
-					if (wk->wk_type == D_MKDIR)
-						break;
-				if (wk) {
-					gotit = getdirtybuf(bp, MNT_WAIT);
-					FREE_LOCK(&lk);
-					if (gotit == -1)
-						continue;
-					if (gotit && (error = bwrite(bp)) != 0)
-						break;
-				} else
-					FREE_LOCK(&lk);
-				break;
-			}
-			vput(vp);
-			/* Flushing of first block failed */
-			if (error)
-				break;
-			ACQUIRE_LOCK(&lk);
-			/*
-			 * If that cleared dependencies, go on to next.
-			 */
-			if (dap != LIST_FIRST(diraddhdp))
-				continue;
-			if (dap->da_state & MKDIR_BODY) {
-				FREE_LOCK(&lk);
-				panic("flush_pagedep_deps: MKDIR_BODY");
-			}
-		}
-		/*
-		 * Flush the inode on which the directory entry depends.
-		 * Having accounted for MKDIR_PARENT and MKDIR_BODY above,
-		 * the only remaining dependency is that the updated inode
-		 * count must get pushed to disk. The inode has already
-		 * been pushed into its inode buffer (via VOP_UPDATE) at
-		 * the time of the reference count change. So we need only
-		 * locate that buffer, ensure that there will be no rollback
-		 * caused by a bitmap dependency, then write the inode buffer.
-		 */
-		if (inodedep_lookup(ump->um_fs, inum, 0, &inodedep) == 0) {
-			FREE_LOCK(&lk);
-			panic("flush_pagedep_deps: lost inode");
-		}
-		/*
-		 * If the inode still has bitmap dependencies,
-		 * push them to disk.
-		 */
-	retry:
-		if ((inodedep->id_state & DEPCOMPLETE) == 0) {
-			bp = inodedep->id_buf;
-			gotit = getdirtybuf(bp, MNT_WAIT);
-			if (gotit == -1)
-				goto retry;
-			FREE_LOCK(&lk);
-			if (gotit && (error = bwrite(bp)) != 0)
-				break;
-			ACQUIRE_LOCK(&lk);
-			if (dap != LIST_FIRST(diraddhdp))
-				continue;
-		}
-		/*
-		 * If the inode is still sitting in a buffer waiting
-		 * to be written, push it to disk.
-		 */
-		FREE_LOCK(&lk);
-		if ((error = bread(ump->um_devvp,
-		    fsbtodb(ump->um_fs, ino_to_fsba(ump->um_fs, inum)),
-		    (int)ump->um_fs->fs_bsize, &bp)) != 0) {
-		    	brelse(bp);
-			break;
-		}
-		if ((error = bwrite(bp)) != 0)
-			break;
-		ACQUIRE_LOCK(&lk);
-		/*
-		 * If we have failed to get rid of all the dependencies
-		 * then something is seriously wrong.
-		 */
-		if (dap == LIST_FIRST(diraddhdp)) {
-			FREE_LOCK(&lk);
-			panic("flush_pagedep_deps: flush failed");
-		}
-	}
-	if (error)
-		ACQUIRE_LOCK(&lk);
-	return (error);
-}
-
-/*
- * A large burst of file addition or deletion activity can drive the
- * memory load excessively high. First attempt to slow things down
- * using the techniques below. If that fails, this routine requests
- * the offending operations to fall back to running synchronously
- * until the memory load returns to a reasonable level.
- */
-int
-softdep_slowdown(struct vnode *vp)
-{
-	int max_softdeps_hard;
-
-	max_softdeps_hard = max_softdeps * 11 / 10;
-	if (num_dirrem < max_softdeps_hard / 2 &&
-	    num_inodedep < max_softdeps_hard)
-		return (0);
-	stat_sync_limit_hit += 1;
-	return (1);
-}
-
-/*
- * If memory utilization has gotten too high, deliberately slow things
- * down and speed up the I/O processing.
- */
-STATIC int
-request_cleanup(int resource, int islocked)
-{
-	struct proc *p = CURPROC;
-	int s;
-
-	/*
-	 * We never hold up the filesystem syncer process.
-	 */
-	if (p == filesys_syncer || (p->p_flag & P_SOFTDEP))
-		return (0);
-	/*
-	 * First check to see if the work list has gotten backlogged.
-	 * If it has, co-opt this process to help clean up two entries.
-	 * Because this process may hold inodes locked, we cannot
-	 * handle any remove requests that might block on a locked
-	 * inode as that could lead to deadlock. We set P_SOFTDEP
-	 * to avoid recursively processing the worklist.
-	 */
-	if (num_on_worklist > max_softdeps / 10) {
-		atomic_setbits_int(&p->p_flag, P_SOFTDEP);
-		if (islocked)
-			FREE_LOCK(&lk);
-		process_worklist_item(NULL, NULL, LK_NOWAIT);
-		process_worklist_item(NULL, NULL, LK_NOWAIT);
-		atomic_clearbits_int(&p->p_flag, P_SOFTDEP);
-		stat_worklist_push += 2;
-		if (islocked)
-			ACQUIRE_LOCK(&lk);
-		return(1);
-	}
-	/*
-	 * Next, we attempt to speed up the syncer process. If that
-	 * is successful, then we allow the process to continue.
-	 */
-	if (speedup_syncer())
-		return(0);
-	/*
-	 * If we are resource constrained on inode dependencies, try
-	 * flushing some dirty inodes. Otherwise, we are constrained
-	 * by file deletions, so try accelerating flushes of directories
-	 * with removal dependencies. We would like to do the cleanup
-	 * here, but we probably hold an inode locked at this point and 
-	 * that might deadlock against one that we try to clean. So,
-	 * the best that we can do is request the syncer daemon to do
-	 * the cleanup for us.
-	 */
-	switch (resource) {
-
-	case FLUSH_INODES:
-		stat_ino_limit_push += 1;
-		req_clear_inodedeps += 1;
-		stat_countp = &stat_ino_limit_hit;
-		break;
-
-	case FLUSH_REMOVE:
-		stat_blk_limit_push += 1;
-		req_clear_remove += 1;
-		stat_countp = &stat_blk_limit_hit;
-		break;
-
-	default:
-		if (islocked)
-			FREE_LOCK(&lk);
-		panic("request_cleanup: unknown type");
-	}
-	/*
-	 * Hopefully the syncer daemon will catch up and awaken us.
-	 * We wait at most tickdelay before proceeding in any case.
-	 */
-	if (islocked == 0)
-		ACQUIRE_LOCK(&lk);
-	proc_waiting += 1;
-	if (!timeout_pending(&proc_waiting_timeout))
-		timeout_add(&proc_waiting_timeout, tickdelay > 2 ? tickdelay : 2);
-
-	s = FREE_LOCK_INTERLOCKED(&lk);
-	tsleep_nsec(&proc_waiting, PPAUSE, "softupdate", INFSLP);
-	ACQUIRE_LOCK_INTERLOCKED(&lk, s);
-	proc_waiting -= 1;
-	if (islocked == 0)
-		FREE_LOCK(&lk);
-	return (1);
-}
-
-/*
- * Awaken processes pausing in request_cleanup and clear proc_waiting
- * to indicate that there is no longer a timer running.
- */
-void
-pause_timer(void *arg)
-{
-
-	*stat_countp += 1;
-	wakeup_one(&proc_waiting);
-	if (proc_waiting > 0)
-		timeout_add(&proc_waiting_timeout, tickdelay > 2 ? tickdelay : 2);
-}
-
-/*
- * Flush out a directory with at least one removal dependency in an effort to
- * reduce the number of dirrem, freefile, and freeblks dependency structures.
- */
-STATIC void
-clear_remove(struct proc *p)
-{
-	struct pagedep_hashhead *pagedephd;
-	struct pagedep *pagedep;
-	static int next = 0;
-	struct mount *mp;
-	struct vnode *vp;
-	int error, cnt;
-	ufsino_t ino;
-
-	ACQUIRE_LOCK(&lk);
-	for (cnt = 0; cnt <= pagedep_hash; cnt++) {
-		pagedephd = &pagedep_hashtbl[next++];
-		if (next > pagedep_hash)
-			next = 0;
-		LIST_FOREACH(pagedep, pagedephd, pd_hash) {
-			if (LIST_FIRST(&pagedep->pd_dirremhd) == NULL)
-				continue;
-			mp = pagedep->pd_mnt;
-			ino = pagedep->pd_ino;
-#if 0
-			if (vn_start_write(NULL, &mp, V_NOWAIT) != 0)
-				continue;
-#endif
-			FREE_LOCK(&lk);
-			if ((error = VFS_VGET(mp, ino, &vp)) != 0) {
-				softdep_error("clear_remove: vget", error);
-#if 0
-				vn_finished_write(mp);
-#endif
-				return;
-			}
-			if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)))
-				softdep_error("clear_remove: fsync", error);
-			drain_output(vp, 0);
-			vput(vp);
-#if 0
-			vn_finished_write(mp);
-#endif
-			return;
-		}
-	}
-	FREE_LOCK(&lk);
-}
-
-/*
- * Clear out a block of dirty inodes in an effort to reduce
- * the number of inodedep dependency structures.
- */
-STATIC void
-clear_inodedeps(struct proc *p)
-{
-	struct inodedep_hashhead *inodedephd;
-	struct inodedep *inodedep = NULL;
-	static int next = 0;
-	struct mount *mp;
-	struct vnode *vp;
-	struct fs *fs;
-	int error, cnt;
-	ufsino_t firstino, lastino, ino;
-
-	ACQUIRE_LOCK(&lk);
-	/*
-	 * Pick a random inode dependency to be cleared.
-	 * We will then gather up all the inodes in its block 
-	 * that have dependencies and flush them out.
-	 */
-	for (cnt = 0; cnt <= inodedep_hash; cnt++) {
-		inodedephd = &inodedep_hashtbl[next++];
-		if (next > inodedep_hash)
-			next = 0;
-		if ((inodedep = LIST_FIRST(inodedephd)) != NULL)
-			break;
-	}
-	if (inodedep == NULL) {
-		FREE_LOCK(&lk);
-		return;
-	}
-	/*
-	 * Ugly code to find mount point given pointer to superblock.
-	 */
-	fs = inodedep->id_fs;
-	TAILQ_FOREACH(mp, &mountlist, mnt_list)
-		if ((mp->mnt_flag & MNT_SOFTDEP) && fs == VFSTOUFS(mp)->um_fs)
-			break;
-	/*
-	 * Find the last inode in the block with dependencies.
-	 */
-	firstino = inodedep->id_ino & ~(INOPB(fs) - 1);
-	for (lastino = firstino + INOPB(fs) - 1; lastino > firstino; lastino--)
-		if (inodedep_lookup(fs, lastino, 0, &inodedep) != 0)
-			break;
-	/*
-	 * Asynchronously push all but the last inode with dependencies.
-	 * Synchronously push the last inode with dependencies to ensure
-	 * that the inode block gets written to free up the inodedeps.
-	 */
-	for (ino = firstino; ino <= lastino; ino++) {
-		if (inodedep_lookup(fs, ino, 0, &inodedep) == 0)
-			continue;
-		FREE_LOCK(&lk);
-#if 0
-		if (vn_start_write(NULL, &mp, V_NOWAIT) != 0)
-			continue;
-#endif
-		if ((error = VFS_VGET(mp, ino, &vp)) != 0) {
-			softdep_error("clear_inodedeps: vget", error);
-#if 0
-			vn_finished_write(mp);
-#endif
-			return;
-		}
-		if (ino == lastino) {
-			if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_WAIT, p)))
-				softdep_error("clear_inodedeps: fsync1", error);
-		} else {
-			if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)))
-				softdep_error("clear_inodedeps: fsync2", error);
-			drain_output(vp, 0);
-		}
-		vput(vp);
-#if 0
-		vn_finished_write(mp);
-#endif
-		ACQUIRE_LOCK(&lk);
-	}
-	FREE_LOCK(&lk);
-}
-
-/*
- * Function to determine if the buffer has outstanding dependencies
- * that will cause a roll-back if the buffer is written. If wantcount
- * is set, return number of dependencies, otherwise just yes or no.
- */
-int
-softdep_count_dependencies(struct buf *bp, int wantcount, int islocked)
-{
-	struct worklist *wk;
-	struct inodedep *inodedep;
-	struct indirdep *indirdep;
-	struct allocindir *aip;
-	struct pagedep *pagedep;
-	struct diradd *dap;
-	int i, retval;
-
-	retval = 0;
-	if (!islocked)
-		ACQUIRE_LOCK(&lk);
-	LIST_FOREACH(wk, &bp->b_dep, wk_list) {
-		switch (wk->wk_type) {
-
-		case D_INODEDEP:
-			inodedep = WK_INODEDEP(wk);
-			if ((inodedep->id_state & DEPCOMPLETE) == 0) {
-				/* bitmap allocation dependency */
-				retval += 1;
-				if (!wantcount)
-					goto out;
-			}
-			if (TAILQ_FIRST(&inodedep->id_inoupdt)) {
-				/* direct block pointer dependency */
-				retval += 1;
-				if (!wantcount)
-					goto out;
-			}
-			continue;
-
-		case D_INDIRDEP:
-			indirdep = WK_INDIRDEP(wk);
-
-			LIST_FOREACH(aip, &indirdep->ir_deplisthd, ai_next) {
-				/* indirect block pointer dependency */
-				retval += 1;
-				if (!wantcount)
-					goto out;
-			}
-			continue;
-
-		case D_PAGEDEP:
-			pagedep = WK_PAGEDEP(wk);
-			for (i = 0; i < DAHASHSZ; i++) {
-
-				LIST_FOREACH(dap, &pagedep->pd_diraddhd[i], da_pdlist) {
-					/* directory entry dependency */
-					retval += 1;
-					if (!wantcount)
-						goto out;
-				}
-			}
-			continue;
-
-		case D_BMSAFEMAP:
-		case D_ALLOCDIRECT:
-		case D_ALLOCINDIR:
-		case D_MKDIR:
-			/* never a dependency on these blocks */
-			continue;
-
-		default:
-			if (!islocked)
-				FREE_LOCK(&lk);
-			panic("softdep_check_for_rollback: Unexpected type %s",
-			    TYPENAME(wk->wk_type));
-			/* NOTREACHED */
-		}
-	}
-out:
-	if (!islocked)
-		FREE_LOCK(&lk);
-	return retval;
-}
-
-/*
- * Acquire exclusive access to a buffer.
- * Must be called with splbio blocked.
- * Returns:
- * 1 if the buffer was acquired and is dirty;
- * 0 if the buffer was clean, or we would have slept but had MN_NOWAIT;
- * -1 if we slept and may try again (but not with this bp).
- */
-STATIC int
-getdirtybuf(struct buf *bp, int waitfor)
-{
-	int s;
-
-	if (bp == NULL)
-		return (0);
-
-	splassert(IPL_BIO);
-
-	if (bp->b_flags & B_BUSY) {
-		if (waitfor != MNT_WAIT)
-			return (0);
-		bp->b_flags |= B_WANTED;
-		s = FREE_LOCK_INTERLOCKED(&lk);
-		tsleep_nsec(bp, PRIBIO+1, "sdsdty", INFSLP);
-		ACQUIRE_LOCK_INTERLOCKED(&lk, s);
-		return (-1);
-	}
-	if ((bp->b_flags & B_DELWRI) == 0)
-		return (0);
-	bremfree(bp);
-	buf_acquire(bp);
-	return (1);
-}
-
-/*
- * Wait for pending output on a vnode to complete.
- * Must be called with vnode locked.
- */
-STATIC void
-drain_output(struct vnode *vp, int islocked)
-{
-	int s;
-
-	if (!islocked)
-		ACQUIRE_LOCK(&lk);
-
-	splassert(IPL_BIO);
-
-	while (vp->v_numoutput) {
-		vp->v_bioflag |= VBIOWAIT;
-		s = FREE_LOCK_INTERLOCKED(&lk);
-		tsleep_nsec(&vp->v_numoutput, PRIBIO+1, "drain_output", INFSLP);
-		ACQUIRE_LOCK_INTERLOCKED(&lk, s);
-	}
-	if (!islocked)
-		FREE_LOCK(&lk);
-}
-
-/*
- * Called whenever a buffer that is being invalidated or reallocated
- * contains dependencies. This should only happen if an I/O error has
- * occurred. The routine is called with the buffer locked.
- */ 
-void
-softdep_deallocate_dependencies(struct buf *bp)
-{
-
-	if ((bp->b_flags & B_ERROR) == 0)
-		panic("softdep_deallocate_dependencies: dangling deps");
-	softdep_error(bp->b_vp->v_mount->mnt_stat.f_mntonname, bp->b_error);
-	panic("softdep_deallocate_dependencies: unrecovered I/O error");
-}
-
-/*
- * Function to handle asynchronous write errors in the filesystem.
- */
-void
-softdep_error(char *func, int error)
-{
-
-	/* XXX should do something better! */
-	printf("%s: got error %d while accessing filesystem\n", func, error);
-}
-
-#ifdef DDB
-#include <machine/db_machdep.h>
-#include <ddb/db_interface.h>
-#include <ddb/db_output.h>
-
-void
-softdep_print(struct buf *bp, int full,
-    int (*pr)(const char *, ...) __attribute__((__format__(__kprintf__,1,2))))
-{
-	struct worklist *wk;
-
-	(*pr)("  deps:\n");
-	LIST_FOREACH(wk, &bp->b_dep, wk_list)
-		worklist_print(wk, full, pr);
-}
-
-void
-worklist_print(struct worklist *wk, int full,
-    int (*pr)(const char *, ...) __attribute__((__format__(__kprintf__,1,2))))
-{
-	struct pagedep *pagedep;
-	struct inodedep *inodedep;
-	struct newblk *newblk;
-	struct bmsafemap *bmsafemap;
-	struct allocdirect *adp;
-	struct indirdep *indirdep;
-	struct allocindir *aip;
-	struct freefrag *freefrag;
-	struct freeblks *freeblks;
-	struct freefile *freefile;
-	struct diradd *dap;
-	struct mkdir *mkdir;
-	struct dirrem *dirrem;
-	struct newdirblk *newdirblk;
-	char prefix[33];
-	int i;
-
-	for (prefix[i = 2 * MIN(16, full)] = '\0'; i--; prefix[i] = ' ')
-		;
-
-	(*pr)("%s%s(%p) state %b\n%s", prefix, TYPENAME(wk->wk_type), wk,
-	    wk->wk_state, DEP_BITS, prefix);
-	switch (wk->wk_type) {
-	case D_PAGEDEP:
-		pagedep = WK_PAGEDEP(wk);
-		(*pr)("mount %p ino %u lbn %lld\n", pagedep->pd_mnt,
-		    pagedep->pd_ino, (long long)pagedep->pd_lbn);
-		break;
-	case D_INODEDEP:
-		inodedep = WK_INODEDEP(wk);
-		(*pr)("fs %p ino %u nlinkdelta %u dino %p\n"
-		    "%s  bp %p savsz %lld\n", inodedep->id_fs,
-		    inodedep->id_ino, inodedep->id_nlinkdelta,
-		    inodedep->id_un.idu_savedino1,
-		    prefix, inodedep->id_buf, inodedep->id_savedsize);
-		break;
-	case D_NEWBLK:
-		newblk = WK_NEWBLK(wk);
-		(*pr)("fs %p newblk %lld state %d bmsafemap %p\n",
-		    newblk->nb_fs, (long long)newblk->nb_newblkno,
-		    newblk->nb_state, newblk->nb_bmsafemap);
-		break;
-	case D_BMSAFEMAP:
-		bmsafemap = WK_BMSAFEMAP(wk);
-		(*pr)("buf %p\n", bmsafemap->sm_buf);
-		break;
-	case D_ALLOCDIRECT:
-		adp = WK_ALLOCDIRECT(wk);
-		(*pr)("lbn %lld newlbk %lld oldblk %lld newsize %ld olsize "
-		    "%ld\n%s  bp %p inodedep %p freefrag %p\n",
-		    (long long)adp->ad_lbn, (long long)adp->ad_newblkno,
-		    (long long)adp->ad_oldblkno, adp->ad_newsize,
-		    adp->ad_oldsize,
-		    prefix, adp->ad_buf, adp->ad_inodedep, adp->ad_freefrag);
-		break;
-	case D_INDIRDEP:
-		indirdep = WK_INDIRDEP(wk);
-		(*pr)("savedata %p savebp %p\n", indirdep->ir_saveddata,
-		    indirdep->ir_savebp);
-		break;
-	case D_ALLOCINDIR:
-		aip = WK_ALLOCINDIR(wk);
-		(*pr)("off %d newblk %lld oldblk %lld freefrag %p\n"
-		    "%s  indirdep %p buf %p\n", aip->ai_offset,
-		    (long long)aip->ai_newblkno, (long long)aip->ai_oldblkno,
-		    aip->ai_freefrag, prefix, aip->ai_indirdep, aip->ai_buf);
-		break;
-	case D_FREEFRAG:
-		freefrag = WK_FREEFRAG(wk);
-		(*pr)("vnode %p mp %p blkno %lld fsize %ld ino %u\n",
-		    freefrag->ff_devvp, freefrag->ff_mnt,
-		    (long long)freefrag->ff_blkno, freefrag->ff_fragsize,
-		    freefrag->ff_inum);
-		break;
-	case D_FREEBLKS:
-		freeblks = WK_FREEBLKS(wk);
-		(*pr)("previno %u devvp %p mp %p oldsz %lld newsz %lld\n"
-		    "%s  chkcnt %d uid %d\n", freeblks->fb_previousinum,
-		    freeblks->fb_devvp, freeblks->fb_mnt, freeblks->fb_oldsize,
-		    freeblks->fb_newsize,
-		    prefix, freeblks->fb_chkcnt, freeblks->fb_uid);
-		break;
-	case D_FREEFILE:
-		freefile = WK_FREEFILE(wk);
-		(*pr)("mode %x oldino %u vnode %p mp %p\n", freefile->fx_mode,
-		    freefile->fx_oldinum, freefile->fx_devvp, freefile->fx_mnt);
-		break;
-	case D_DIRADD:
-		dap = WK_DIRADD(wk);
-		(*pr)("off %d ino %u da_un %p\n", dap->da_offset, 
-		    dap->da_newinum, dap->da_un.dau_previous);
-		break;
-	case D_MKDIR:
-		mkdir = WK_MKDIR(wk);
-		(*pr)("diradd %p bp %p\n", mkdir->md_diradd, mkdir->md_buf);
-		break;
-	case D_DIRREM:
-		dirrem = WK_DIRREM(wk);
-		(*pr)("mp %p ino %u dm_un %p\n", dirrem->dm_mnt, 
-		    dirrem->dm_oldinum, dirrem->dm_un.dmu_pagedep);
-		break;
-	case D_NEWDIRBLK:
-		newdirblk = WK_NEWDIRBLK(wk);
-		(*pr)("pagedep %p\n", newdirblk->db_pagedep);
-		break;
-	}
-}
-#endif
diff --git a/sys/ufs/ffs/ffs_softdep_stub.c b/sys/ufs/ffs/ffs_softdep_stub.c
index 26ec89c73bb..e69de29bb2d 100644
--- a/sys/ufs/ffs/ffs_softdep_stub.c
+++ b/sys/ufs/ffs/ffs_softdep_stub.c
@@ -1,193 +0,0 @@
-/*	$OpenBSD: ffs_softdep_stub.c,v 1.18 2013/06/11 16:42:18 deraadt Exp $	*/
-
-/*
- * Copyright 1998 Marshall Kirk McKusick. All Rights Reserved.
- *
- * The soft updates code is derived from the appendix of a University
- * of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
- * "Soft Updates: A Solution to the Metadata Update Problem in File
- * Systems", CSE-TR-254-95, August 1995).
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. None of the names of McKusick, Ganger, or the University of Michigan
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	from: @(#)ffs_softdep_stub.c	9.1 (McKusick) 7/10/97
- * $FreeBSD: src/sys/ufs/ffs/ffs_softdep_stub.c,v 1.14 2000/08/09 00:41:54 tegge Exp $
- */
-
-#ifndef FFS_SOFTUPDATES
-
-#include <sys/param.h>
-#include <sys/vnode.h>
-#include <sys/systm.h>
-#include <ufs/ufs/quota.h>
-#include <ufs/ufs/inode.h>
-#include <ufs/ffs/ffs_extern.h>
-#include <ufs/ufs/ufs_extern.h>
-
-int
-softdep_flushfiles(struct mount *oldmnt, int flags, struct proc *p)
-{
-	panic("softdep_flushfiles called");
-}
-
-int
-softdep_mount(struct vnode *devvp, struct mount *mp, struct fs *fs,
-    struct ucred *cred)
-{
-	return (0);
-}
-
-void 
-softdep_initialize(void)
-{
-	return;
-}
-
-#ifndef __OPTIMIZE__
-
-void
-softdep_setup_inomapdep(struct buf *bp, struct inode *ip, ufsino_t newinum)
-{
-	panic("softdep_setup_inomapdep called");
-}
-
-void
-softdep_setup_blkmapdep(struct buf *bp, struct fs *fs, daddr_t newblkno)
-{
-	panic("softdep_setup_blkmapdep called");
-}
-
-void 
-softdep_setup_allocdirect(struct inode *ip, daddr_t lbn, daddr_t newblkno,
-    daddr_t oldblkno, long newsize, long oldsize, struct buf *bp)
-{
-	panic("softdep_setup_allocdirect called");
-}
-
-void
-softdep_setup_allocindir_page(struct inode *ip, daddr_t lbn, struct buf *bp,
-    int ptrno, daddr_t newblkno, daddr_t oldblkno, struct buf *nbp)
-{
-	panic("softdep_setup_allocindir_page called");
-}
-
-void
-softdep_setup_allocindir_meta(struct buf *nbp, struct inode *ip,
-    struct buf *bp, int ptrno, daddr_t newblkno)
-{
-	panic("softdep_setup_allocindir_meta called");
-}
-
-void
-softdep_setup_freeblocks(struct inode *ip, off_t length)
-{
-	panic("softdep_setup_freeblocks called");
-}
-
-void
-softdep_freefile(struct vnode *pvp, ufsino_t ino, mode_t mode)
-{
-	panic("softdep_freefile called");
-}
-
-int
-softdep_setup_directory_add(struct buf *bp, struct inode *dp, off_t diroffset,
-    long newinum, struct buf *newdirbp, int isnewblk)
-{
-	panic("softdep_setup_directory_add called");
-	return (0);
-}
-
-void 
-softdep_change_directoryentry_offset(struct inode *dp, caddr_t base,
-    caddr_t oldloc, caddr_t newloc, int entrysize)
-{
-	panic("softdep_change_directoryentry_offset called");
-}
-
-void 
-softdep_setup_remove(struct buf *bp, struct inode *dp, struct inode *ip,
-    int isrmdir)
-{
-	panic("softdep_setup_remove called");
-}
-
-void 
-softdep_setup_directory_change(struct buf *bp, struct inode *dp,
-    struct inode *ip, long newinum, int isrmdir)
-{
-	panic("softdep_setup_directory_change called");
-}
-
-void
-softdep_change_linkcnt(struct inode *ip, int nodelay)
-{
-	panic("softdep_change_linkcnt called");
-}
-
-void 
-softdep_load_inodeblock(struct inode *ip)
-{
-	panic("softdep_load_inodeblock called");
-}
-
-void 
-softdep_update_inodeblock(struct inode *ip, struct buf *bp, int waitfor)
-{
-	panic("softdep_update_inodeblock called");
-}
-
-#endif
-
-void
-softdep_fsync_mountdev(struct vnode *vp, int waitfor)
-{
-	return;
-}
-
-int
-softdep_flushworklist(struct mount *oldmnt, int *countp, struct proc *p)
-{
-	*countp = 0;
-	return (0);
-}
-
-int
-softdep_sync_metadata(struct vop_fsync_args *ap)
-{
-	return (0);
-}
-
-#ifndef __OPTIMIZE__
-
-int
-softdep_slowdown(struct vnode *vp)
-{
-	panic("softdep_slowdown called");
-}
-
-#endif
-
-#endif /* !FFS_SOFTUPDATES */
diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c
index 97b42d35ac4..d4bf30d5a89 100644
--- a/sys/ufs/ffs/ffs_vfsops.c
+++ b/sys/ufs/ffs/ffs_vfsops.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_vfsops.c,v 1.197 2024/01/19 18:58:17 deraadt Exp $	*/
+/*	$OpenBSD: ffs_vfsops.c,v 1.198 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_vfsops.c,v 1.19 1996/02/09 22:22:26 christos Exp $	*/
 
 /*
@@ -213,20 +213,6 @@ ffs_mount(struct mount *mp, const char *path, void *data,
 	int error = 0, flags;
 	int ronly;
 
-	/* Ask not for whom the bell tolls */
-	if (mp->mnt_flag & MNT_SOFTDEP) {
-		mp->mnt_flag &= ~MNT_SOFTDEP;
-	}
-
-	/*
-	 * Soft updates is incompatible with "async",
-	 * so if we are doing softupdates stop the user
-	 * from setting the async flag.
-	 */
-	if ((mp->mnt_flag & (MNT_SOFTDEP | MNT_ASYNC)) ==
-	    (MNT_SOFTDEP | MNT_ASYNC)) {
-		return (EINVAL);
-	}
 	/*
 	 * If updating, check whether changing from read-only to
 	 * read/write; if there is no device name, that's all we do.
@@ -238,16 +224,6 @@ ffs_mount(struct mount *mp, const char *path, void *data,
 		error = 0;
 		ronly = fs->fs_ronly;
 
-		/*
-		 * Soft updates won't be set if read/write,
-		 * so "async" will be illegal.
-		 */
-		if (ronly == 0 && (mp->mnt_flag & MNT_ASYNC) &&
-		    (fs->fs_flags & FS_DOSOFTDEP)) {
-			error = EINVAL;
-			goto error_1;
-		}
-
 		if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
 			/* Flush any dirty data */
 			VFS_SYNC(mp, MNT_WAIT, 0, p->p_ucred, p);
@@ -260,46 +236,11 @@ ffs_mount(struct mount *mp, const char *path, void *data,
 				flags |= IGNORECLEAN;
 			if (mp->mnt_flag & MNT_FORCE)
 				flags |= FORCECLOSE;
-			if (fs->fs_flags & FS_DOSOFTDEP) {
-				error = softdep_flushfiles(mp, flags, p);
-				mp->mnt_flag &= ~MNT_SOFTDEP;
-			} else
-				error = ffs_flushfiles(mp, flags, p);
+			error = ffs_flushfiles(mp, flags, p);
 			mp->mnt_flag |= MNT_RDONLY;
 			ronly = 1;
 		}
 
-		/*
-		 * Flush soft dependencies if disabling it via an update
-		 * mount. This may leave some items to be processed,
-		 * so don't do this yet XXX.
-		 */
-		if ((fs->fs_flags & FS_DOSOFTDEP) &&
-		    !(mp->mnt_flag & MNT_SOFTDEP) &&
-		    !(mp->mnt_flag & MNT_RDONLY) && fs->fs_ronly == 0) {
-#if 0
-			flags = WRITECLOSE;
-			if (mp->mnt_flag & MNT_FORCE)
-				flags |= FORCECLOSE;
-			error = softdep_flushfiles(mp, flags, p);
-#endif
-		}
-		/*
-		 * When upgrading to a softdep mount, we must first flush
-		 * all vnodes. (not done yet -- see above)
-		 */
-		if (!(fs->fs_flags & FS_DOSOFTDEP) &&
-		    (mp->mnt_flag & MNT_SOFTDEP) && fs->fs_ronly == 0) {
-#if 0
-			flags = WRITECLOSE;
-			if (mp->mnt_flag & MNT_FORCE)
-				flags |= FORCECLOSE;
-			error = ffs_flushfiles(mp, flags, p);
-#else
-			mp->mnt_flag &= ~MNT_SOFTDEP;
-#endif
-		}
-
 		if (!error && (mp->mnt_flag & MNT_RELOAD))
 			error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
 		if (error)
@@ -307,19 +248,6 @@ ffs_mount(struct mount *mp, const char *path, void *data,
 
 		if (ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
 			if (fs->fs_clean == 0) {
-#if 0
-				/*
-				 * It is safe to mount an unclean file system
-				 * if it was previously mounted with softdep
-				 * but we may lose space and must
-				 * sometimes run fsck manually.
-				 */
-				if (fs->fs_flags & FS_DOSOFTDEP)
-					printf(
-"WARNING: %s was not properly unmounted\n",
-					    fs->fs_fsmnt);
-				else
-#endif
 				if (mp->mnt_flag & MNT_FORCE) {
 					printf(
 "WARNING: %s was not properly unmounted\n",
@@ -333,12 +261,6 @@ ffs_mount(struct mount *mp, const char *path, void *data,
 				}
 			}
 
-			if ((fs->fs_flags & FS_DOSOFTDEP)) {
-				error = softdep_mount(devvp, mp, fs,
-						      p->p_ucred);
-				if (error)
-					goto error_1;
-			}
 			fs->fs_contigdirs = malloc((u_long)fs->fs_ncg,
 			     M_UFSMNT, M_WAITOK|M_ZERO);
 
@@ -454,9 +376,6 @@ success:
 			if (ronly)
 				free(fs->fs_contigdirs, M_UFSMNT, fs->fs_ncg);
 		}
-		if (!ronly) {
-			fs->fs_flags &= ~FS_DOSOFTDEP;
-		}
 		ffs_sbupdate(ump, MNT_WAIT);
 #if 0
 		if (ronly) {
@@ -627,8 +546,6 @@ ffs_reload(struct mount *mountp, struct ucred *cred, struct proc *p)
 		space += size;
 		brelse(bp);
 	}
-	if ((fs->fs_flags & FS_DOSOFTDEP))
-		(void) softdep_mount(devvp, mountp, fs, cred);
 	/*
 	 * We no longer know anything about clusters per cylinder group.
 	 */
@@ -767,19 +684,6 @@ ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p)
 	fs->fs_fmod = 0;
 	fs->fs_flags &= ~FS_UNCLEAN;
 	if (fs->fs_clean == 0) {
-#if 0
-		/*
-		 * It is safe to mount an unclean file system
-		 * if it was previously mounted with softdep
-		 * but we may lose space and must
-		 * sometimes run fsck manually.
-		 */
-		if (fs->fs_flags & FS_DOSOFTDEP)
-			printf(
-"WARNING: %s was not properly unmounted\n",
-			    fs->fs_fsmnt);
-		else
-#endif
 		if (ronly || (mp->mnt_flag & MNT_FORCE)) {
 			printf(
 "WARNING: %s was not properly unmounted\n",
@@ -908,15 +812,8 @@ ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p)
 	if (fs->fs_maxfilesize > maxfilesize)			/* XXX */
 		fs->fs_maxfilesize = maxfilesize;		/* XXX */
 	if (ronly == 0) {
-		if ((fs->fs_flags & FS_DOSOFTDEP) &&
-		    (error = softdep_mount(devvp, mp, fs, cred)) != 0) {
-			free(fs->fs_csp, M_UFSMNT, 0);
-			free(fs->fs_contigdirs, M_UFSMNT, fs->fs_ncg);
-			goto out;
-		}
 		fs->fs_fmod = 1;
 		fs->fs_clean = 0;
-		fs->fs_flags &= ~FS_DOSOFTDEP;
 		error = ffs_sbupdate(ump, MNT_WAIT);
 		if (error == EROFS)
 			goto out;
@@ -1028,10 +925,7 @@ ffs_unmount(struct mount *mp, int mntflags, struct proc *p)
 
 	ump = VFSTOUFS(mp);
 	fs = ump->um_fs;
-	if (mp->mnt_flag & MNT_SOFTDEP)
-		error = softdep_flushfiles(mp, flags, p);
-	else
-		error = ffs_flushfiles(mp, flags, p);
+	error = ffs_flushfiles(mp, flags, p);
 	if (error != 0)
 		return (error);
 
@@ -1206,7 +1100,7 @@ ffs_sync(struct mount *mp, int waitfor, int stall, struct ucred *cred, struct pr
 {
 	struct ufsmount *ump = VFSTOUFS(mp);
 	struct fs *fs;
-	int error, allerror = 0, count, clean, fmod;
+	int error, allerror = 0, clean, fmod;
 	struct ffs_sync_args fsa;
 
 	fs = ump->um_fs;
@@ -1219,7 +1113,7 @@ ffs_sync(struct mount *mp, int waitfor, int stall, struct ucred *cred, struct pr
 		printf("fs = %s\n", fs->fs_fsmnt);
 		panic("update: rofs mod");
 	}
- loop:
+
 	/*
 	 * Write back each (modified) inode.
 	 */
@@ -1241,13 +1135,6 @@ ffs_sync(struct mount *mp, int waitfor, int stall, struct ucred *cred, struct pr
 	/*
 	 * Force stale file system control information to be flushed.
 	 */
-	if ((ump->um_mountp->mnt_flag & MNT_SOFTDEP) && waitfor == MNT_WAIT) {
-		if ((error = softdep_flushworklist(ump->um_mountp, &count, p)))
-			allerror = error;
-		/* Flushed work items may create new vnodes to clean */
-		if (count) 
-			goto loop;
-	}
 	if (waitfor != MNT_LAZY) {
 		vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
 		if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) != 0)
@@ -1387,10 +1274,7 @@ retry:
 
 	brelse(bp);
 
-	if (DOINGSOFTDEP(vp))
-		softdep_load_inodeblock(ip);
-	else
-		ip->i_effnlink = DIP(ip, nlink);
+	ip->i_effnlink = DIP(ip, nlink);
 
 	/*
 	 * Initialize the vnode from the inode, check for aliases.
@@ -1556,32 +1440,10 @@ ffs_init(struct vfsconf *vfsp)
 	    PR_WAITOK, "dino2pl", NULL);
 #endif
 
-	softdep_initialize();
-
 	return (ufs_init(vfsp));
 }
 
-#ifdef FFS_SOFTUPDATES
-extern int max_softdeps, tickdelay, stat_worklist_push;
-extern int stat_blk_limit_push, stat_ino_limit_push, stat_blk_limit_hit;
-extern int stat_ino_limit_hit, stat_sync_limit_hit, stat_indir_blk_ptrs;
-extern int stat_inode_bitmap, stat_direct_blk_ptrs, stat_dir_entry;
-#endif
 const struct sysctl_bounded_args ffs_vars[] = {
-#ifdef FFS_SOFTUPDATES
-	{ FFS_MAX_SOFTDEPS, &max_softdeps, 0, INT_MAX },
-	{ FFS_SD_TICKDELAY, &tickdelay, 2, INT_MAX },
-	{ FFS_SD_WORKLIST_PUSH, &stat_worklist_push, SYSCTL_INT_READONLY },
-	{ FFS_SD_BLK_LIMIT_PUSH, &stat_blk_limit_push, SYSCTL_INT_READONLY },
-	{ FFS_SD_INO_LIMIT_PUSH, &stat_ino_limit_push, SYSCTL_INT_READONLY },
-	{ FFS_SD_BLK_LIMIT_HIT, &stat_blk_limit_hit, SYSCTL_INT_READONLY },
-	{ FFS_SD_INO_LIMIT_HIT, &stat_ino_limit_hit, SYSCTL_INT_READONLY },
-	{ FFS_SD_SYNC_LIMIT_HIT, &stat_sync_limit_hit, SYSCTL_INT_READONLY },
-	{ FFS_SD_INDIR_BLK_PTRS, &stat_indir_blk_ptrs, SYSCTL_INT_READONLY },
-	{ FFS_SD_INODE_BITMAP, &stat_inode_bitmap, SYSCTL_INT_READONLY },
-	{ FFS_SD_DIRECT_BLK_PTRS, &stat_direct_blk_ptrs, SYSCTL_INT_READONLY },
-	{ FFS_SD_DIR_ENTRY, &stat_dir_entry, SYSCTL_INT_READONLY },
-#endif
 #ifdef UFS_DIRHASH
 	{ FFS_DIRHASH_DIRSIZE, &ufs_mindirhashsize, 0, INT_MAX },
 	{ FFS_DIRHASH_MAXMEM, &ufs_dirhashmaxmem, 0, INT_MAX },
diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c
index 24066cd54c5..f7f359ccc07 100644
--- a/sys/ufs/ffs/ffs_vnops.c
+++ b/sys/ufs/ffs/ffs_vnops.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_vnops.c,v 1.101 2024/01/09 03:16:00 guenther Exp $	*/
+/*	$OpenBSD: ffs_vnops.c,v 1.102 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: ffs_vnops.c,v 1.7 1996/05/11 18:27:24 mycroft Exp $	*/
 
 /*
@@ -420,11 +420,6 @@ ffs_fsync(void *v)
 	struct buf *bp, *nbp;
 	int s, error, passes, skipmeta;
 
-	if (vp->v_type == VBLK &&
-	    vp->v_specmountpoint != NULL &&
-	    (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP))
-		softdep_fsync_mountdev(vp, ap->a_waitfor);
-
 	/*
 	 * Flush all dirty buffers associated with a vnode.
 	 */
@@ -452,13 +447,6 @@ loop:
 			panic("ffs_fsync: not dirty");
 		if (skipmeta && bp->b_lblkno < 0)
 			continue;
-		if (ap->a_waitfor != MNT_WAIT &&
-		    LIST_FIRST(&bp->b_dep) != NULL &&
-		    (bp->b_flags & B_DEFERRED) == 0 &&
-		    buf_countdeps(bp, 0, 1)) {
-			bp->b_flags |= B_DEFERRED;
-			continue;
-		}
 
 		bremfree(bp);
 		buf_acquire(bp);
@@ -492,8 +480,7 @@ loop:
 		 * with the vnode has been written.
 		 */
 		splx(s);
-		if ((error = softdep_sync_metadata(ap)) != 0)
-			return (error);
+		/* XXX softdep was here. reconsider this locking dance */
 		s = splbio();
 		if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
 			/*
diff --git a/sys/ufs/ffs/fs.h b/sys/ufs/ffs/fs.h
index 10e89cfd913..0da3ebaf108 100644
--- a/sys/ufs/ffs/fs.h
+++ b/sys/ufs/ffs/fs.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fs.h,v 1.44 2022/01/11 03:13:59 jsg Exp $	*/
+/*	$OpenBSD: fs.h,v 1.45 2024/02/03 18:51:58 beck Exp $	*/
 /*	$NetBSD: fs.h,v 1.6 1995/04/12 21:21:02 mycroft Exp $	*/
 
 /*
@@ -328,7 +328,6 @@ struct fs {
  * Filesystem flags.
  */
 #define FS_UNCLEAN	0x01	/* filesystem not clean at mount */
-#define FS_DOSOFTDEP	0x02	/* filesystem using soft dependencies */
 /*
  * The following flag is used to detect a FFS1 file system that had its flags
  * moved to the new (FFS2) location for compatibility.
diff --git a/sys/ufs/ffs/softdep.h b/sys/ufs/ffs/softdep.h
index 8279399a89d..e69de29bb2d 100644
--- a/sys/ufs/ffs/softdep.h
+++ b/sys/ufs/ffs/softdep.h
@@ -1,590 +0,0 @@
-/*	$OpenBSD: softdep.h,v 1.18 2018/04/01 12:02:00 dhill Exp $	*/
-
-/*
- * Copyright 1998, 2000 Marshall Kirk McKusick. All Rights Reserved.
- *
- * The soft updates code is derived from the appendix of a University
- * of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
- * "Soft Updates: A Solution to the Metadata Update Problem in File
- * Systems", CSE-TR-254-95, August 1995).
- *
- * Further information about soft updates can be obtained from:
- *
- *	Marshall Kirk McKusick		http://www.mckusick.com/softdep/
- *	1614 Oxford Street		mckusick@mckusick.com
- *	Berkeley, CA 94709-1608		+1-510-843-9542
- *	USA
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)softdep.h	9.7 (McKusick) 6/21/00
- * $FreeBSD: src/sys/ufs/ffs/softdep.h,v 1.10 2000/06/22 00:29:53 mckusick Exp $
- */
-
-#include <sys/queue.h>
-
-/*
- * Allocation dependencies are handled with undo/redo on the in-memory
- * copy of the data. A particular data dependency is eliminated when
- * it is ALLCOMPLETE: that is ATTACHED, DEPCOMPLETE, and COMPLETE.
- * 
- * ATTACHED means that the data is not currently being written to
- * disk. UNDONE means that the data has been rolled back to a safe
- * state for writing to the disk. When the I/O completes, the data is
- * restored to its current form and the state reverts to ATTACHED.
- * The data must be locked throughout the rollback, I/O, and roll
- * forward so that the rolled back information is never visible to
- * user processes. The COMPLETE flag indicates that the item has been
- * written. For example, a dependency that requires that an inode be
- * written will be marked COMPLETE after the inode has been written
- * to disk. The DEPCOMPLETE flag indicates the completion of any other
- * dependencies such as the writing of a cylinder group map has been
- * completed. A dependency structure may be freed only when both it
- * and its dependencies have completed and any rollbacks that are in
- * progress have finished as indicated by the set of ALLCOMPLETE flags
- * all being set. The two MKDIR flags indicate additional dependencies
- * that must be done when creating a new directory. MKDIR_BODY is
- * cleared when the directory data block containing the "." and ".."
- * entries has been written. MKDIR_PARENT is cleared when the parent
- * inode with the increased link count for ".." has been written. When
- * both MKDIR flags have been cleared, the DEPCOMPLETE flag is set to
- * indicate that the directory dependencies have been completed. The
- * writing of the directory inode itself sets the COMPLETE flag which
- * then allows the directory entry for the new directory to be written
- * to disk. The RMDIR flag marks a dirrem structure as representing
- * the removal of a directory rather than a file. When the removal
- * dependencies are completed, additional work needs to be done
- * (truncation of the "." and ".." entries, an additional decrement
- * of the associated inode, and a decrement of the parent inode). The
- * DIRCHG flag marks a diradd structure as representing the changing
- * of an existing entry rather than the addition of a new one. When
- * the update is complete the dirrem associated with the inode for
- * the old name must be added to the worklist to do the necessary
- * reference count decrement. The GOINGAWAY flag indicates that the
- * data structure is frozen from further change until its dependencies
- * have been completed and its resources freed after which it will be
- * discarded. The IOSTARTED flag prevents multiple calls to the I/O
- * start routine from doing multiple rollbacks. The SPACECOUNTED flag
- * says that the files space has been accounted to the pending free
- * space count. The NEWBLOCK flag marks pagedep structures that have
- * just been allocated, so must be claimed by the inode before all
- * dependencies are complete. The ONWORKLIST flag shows whether the
- * structure is currently linked onto a worklist.
- * 
- */
-#define	ATTACHED	0x0001
-#define	UNDONE		0x0002
-#define	COMPLETE	0x0004
-#define	DEPCOMPLETE	0x0008
-#define	MKDIR_PARENT	0x0010	/* diradd & mkdir only */
-#define	MKDIR_BODY	0x0020	/* diradd & mkdir only */
-#define	RMDIR		0x0040	/* dirrem only */
-#define	DIRCHG		0x0080	/* diradd & dirrem only */
-#define	GOINGAWAY	0x0100	/* indirdep only */
-#define	IOSTARTED	0x0200	/* inodedep & pagedep only */
-#define	SPACECOUNTED	0x0400	/* inodedep only */
-#define	NEWBLOCK	0x0800	/* pagedep only */
-#define	UFS1FMT		0x2000	/* indirdep only */
-#define	ONWORKLIST	0x8000
-
-#define	ALLCOMPLETE	(ATTACHED | COMPLETE | DEPCOMPLETE)
-
-#define	DEP_BITS	"\020\01ATTACHED\02UNDONE\03COMPLETE\04DEPCOMPLETE" \
-    "\05MKDIR_PARENT\06MKDIR_BODY\07RMDIR\010DIRCHG\011GOINGAWAY" \
-    "\012IOSTARTED\013SPACECOUNTED\014NEWBLOCK\016UFS1FMT\020ONWORKLIST"
-
-/*
- * The workitem queue.
- * 
- * It is sometimes useful and/or necessary to clean up certain dependencies
- * in the background rather than during execution of an application process
- * or interrupt service routine. To realize this, we append dependency
- * structures corresponding to such tasks to a "workitem" queue. In a soft
- * updates implementation, most pending workitems should not wait for more
- * than a couple of seconds, so the filesystem syncer process awakens once
- * per second to process the items on the queue.
- */
-
-/* LIST_HEAD(workhead, worklist);	-- declared in buf.h */
-
-/*
- * Each request can be linked onto a work queue through its worklist structure.
- * To avoid the need for a pointer to the structure itself, this structure
- * MUST be declared FIRST in each type in which it appears! If more than one
- * worklist is needed in the structure, then a wk_data field must be added
- * and the macros below changed to use it.
- */
-struct worklist {
-	LIST_ENTRY(worklist)	wk_list;	/* list of work requests */
-	unsigned short		wk_type;	/* type of request */
-	unsigned short		wk_state;	/* state flags */
-};
-#define WK_DATA(wk) ((void *)(wk))
-#define WK_PAGEDEP(wk) ((struct pagedep *)(wk))
-#define WK_INODEDEP(wk) ((struct inodedep *)(wk))
-#define WK_NEWBLK(wk) ((struct newblk *)(wk))
-#define WK_BMSAFEMAP(wk) ((struct bmsafemap *)(wk))
-#define WK_ALLOCDIRECT(wk) ((struct allocdirect *)(wk))
-#define WK_INDIRDEP(wk) ((struct indirdep *)(wk))
-#define WK_ALLOCINDIR(wk) ((struct allocindir *)(wk))
-#define WK_FREEFRAG(wk) ((struct freefrag *)(wk))
-#define WK_FREEBLKS(wk) ((struct freeblks *)(wk))
-#define WK_FREEFILE(wk) ((struct freefile *)(wk))
-#define WK_DIRADD(wk) ((struct diradd *)(wk))
-#define WK_MKDIR(wk) ((struct mkdir *)(wk))
-#define WK_DIRREM(wk) ((struct dirrem *)(wk))
-#define WK_NEWDIRBLK(wk) ((struct newdirblk *)(wk))
-
-/*
- * Various types of lists
- */
-LIST_HEAD(dirremhd, dirrem);
-LIST_HEAD(diraddhd, diradd);
-LIST_HEAD(newblkhd, newblk);
-LIST_HEAD(inodedephd, inodedep);
-LIST_HEAD(allocindirhd, allocindir);
-LIST_HEAD(allocdirecthd, allocdirect);
-TAILQ_HEAD(allocdirectlst, allocdirect);
-
-/*
- * The "pagedep" structure tracks the various dependencies related to
- * a particular directory page. If a directory page has any dependencies,
- * it will have a pagedep linked to its associated buffer. The
- * pd_dirremhd list holds the list of dirrem requests which decrement
- * inode reference counts. These requests are processed after the
- * directory page with the corresponding zero'ed entries has been
- * written. The pd_diraddhd list maintains the list of diradd requests
- * which cannot be committed until their corresponding inode has been
- * written to disk. Because a directory may have many new entries
- * being created, several lists are maintained hashed on bits of the
- * offset of the entry into the directory page to keep the lists from
- * getting too long. Once a new directory entry has been cleared to
- * be written, it is moved to the pd_pendinghd list. After the new
- * entry has been written to disk it is removed from the pd_pendinghd
- * list, any removed operations are done, and the dependency structure
- * is freed.
- */
-#define DAHASHSZ 6
-#define DIRADDHASH(offset) (((offset) >> 2) % DAHASHSZ)
-struct pagedep {
-	struct	worklist pd_list;	/* page buffer */
-#	define	pd_state pd_list.wk_state /* check for multiple I/O starts */
-	LIST_ENTRY(pagedep) pd_hash;	/* hashed lookup */
-	struct	mount *pd_mnt;		/* associated mount point */
-	ufsino_t	pd_ino;		/* associated file */
-	daddr_t pd_lbn;		/* block within file */
-	struct	dirremhd pd_dirremhd;	/* dirrem's waiting for page */
-	struct	diraddhd pd_diraddhd[DAHASHSZ]; /* diradd dir entry updates */
-	struct	diraddhd pd_pendinghd;	/* directory entries awaiting write */
-};
-
-/*
- * The "inodedep" structure tracks the set of dependencies associated
- * with an inode. One task that it must manage is delayed operations
- * (i.e., work requests that must be held until the inodedep's associated
- * inode has been written to disk). Getting an inode from its incore 
- * state to the disk requires two steps to be taken by the filesystem
- * in this order: first the inode must be copied to its disk buffer by
- * the VOP_UPDATE operation; second the inode's buffer must be written
- * to disk. To ensure that both operations have happened in the required
- * order, the inodedep maintains two lists. Delayed operations are
- * placed on the id_inowait list. When the VOP_UPDATE is done, all
- * operations on the id_inowait list are moved to the id_bufwait list.
- * When the buffer is written, the items on the id_bufwait list can be
- * safely moved to the work queue to be processed. A second task of the
- * inodedep structure is to track the status of block allocation within
- * the inode.  Each block that is allocated is represented by an
- * "allocdirect" structure (see below). It is linked onto the id_newinoupdt
- * list until both its contents and its allocation in the cylinder
- * group map have been written to disk. Once these dependencies have been
- * satisfied, it is removed from the id_newinoupdt list and any followup
- * actions such as releasing the previous block or fragment are placed
- * on the id_inowait list. When an inode is updated (a VOP_UPDATE is
- * done), the "inodedep" structure is linked onto the buffer through
- * its worklist. Thus, it will be notified when the buffer is about
- * to be written and when it is done. At the update time, all the
- * elements on the id_newinoupdt list are moved to the id_inoupdt list
- * since those changes are now relevant to the copy of the inode in the
- * buffer. Also at update time, the tasks on the id_inowait list are
- * moved to the id_bufwait list so that they will be executed when
- * the updated inode has been written to disk. When the buffer containing
- * the inode is written to disk, any updates listed on the id_inoupdt
- * list are rolled back as they are not yet safe. Following the write,
- * the changes are once again rolled forward and any actions on the
- * id_bufwait list are processed (since those actions are now safe).
- * The entries on the id_inoupdt and id_newinoupdt lists must be kept
- * sorted by logical block number to speed the calculation of the size
- * of the rolled back inode (see explanation in initiate_write_inodeblock).
- * When a directory entry is created, it is represented by a diradd.
- * The diradd is added to the id_inowait list as it cannot be safely
- * written to disk until the inode that it represents is on disk. After
- * the inode is written, the id_bufwait list is processed and the diradd
- * entries are moved to the id_pendinghd list where they remain until
- * the directory block containing the name has been written to disk.
- * The purpose of keeping the entries on the id_pendinghd list is so that
- * the softdep_fsync function can find and push the inode's directory
- * name(s) as part of the fsync operation for that file.
- */
-struct inodedep {
-	struct	worklist id_list;	/* buffer holding inode block */
-#	define	id_state id_list.wk_state /* inode dependency state */
-	LIST_ENTRY(inodedep) id_hash;	/* hashed lookup */
-	struct	fs *id_fs;		/* associated filesystem */
-	ufsino_t	id_ino;		/* dependent inode */
-	nlink_t	id_nlinkdelta;		/* saved effective link count */
-	union { /* Saved UFS1/UFS2 dinode contents */
-		struct ufs1_dinode *idu_savedino1;
-		struct ufs2_dinode *idu_savedino2;
-	} id_un;
-	size_t	id_unsize;		/* size of dinode contents union */
-	LIST_ENTRY(inodedep) id_deps;	/* bmsafemap's list of inodedep's */
-	struct	buf *id_buf;		/* related bmsafemap (if pending) */
-	off_t	id_savedsize;		/* file size saved during rollback */
-	struct	workhead id_pendinghd;	/* entries awaiting directory write */
-	struct	workhead id_bufwait;	/* operations after inode written */
-	struct	workhead id_inowait;	/* operations waiting inode update */
-	struct	allocdirectlst id_inoupdt; /* updates before inode written */
-	struct	allocdirectlst id_newinoupdt; /* updates when inode written */
-};
-
-#define	id_savedino1	id_un.idu_savedino1
-#define	id_savedino2	id_un.idu_savedino2
-
-/*
- * A "newblk" structure is attached to a bmsafemap structure when a block
- * or fragment is allocated from a cylinder group. Its state is set to
- * DEPCOMPLETE when its cylinder group map is written. It is consumed by
- * an associated allocdirect or allocindir allocation which will attach
- * themselves to the bmsafemap structure if the newblk's DEPCOMPLETE flag
- * is not set (i.e., its cylinder group map has not been written).
- */ 
-struct newblk {
-	LIST_ENTRY(newblk) nb_hash;	/* hashed lookup */
-	struct	fs *nb_fs;		/* associated filesystem */
-	daddr_t nb_newblkno;		/* allocated block number */
-	int	nb_state;		/* state of bitmap dependency */
-	LIST_ENTRY(newblk) nb_deps;	/* bmsafemap's list of newblk's */
-	struct	bmsafemap *nb_bmsafemap; /* associated bmsafemap */
-};
-
-/*
- * A "bmsafemap" structure maintains a list of dependency structures
- * that depend on the update of a particular cylinder group map.
- * It has lists for newblks, allocdirects, allocindirs, and inodedeps.
- * It is attached to the buffer of a cylinder group block when any of
- * these things are allocated from the cylinder group. It is freed
- * after the cylinder group map is written and the state of its
- * dependencies are updated with DEPCOMPLETE to indicate that it has
- * been processed.
- */
-struct bmsafemap {
-	struct	worklist sm_list;	/* cylgrp buffer */
-	struct	buf *sm_buf;		/* associated buffer */
-	struct	allocdirecthd sm_allocdirecthd; /* allocdirect deps */
-	struct	allocindirhd sm_allocindirhd; /* allocindir deps */
-	struct	inodedephd sm_inodedephd; /* inodedep deps */
-	struct	newblkhd sm_newblkhd;	/* newblk deps */
-};
-
-/*
- * An "allocdirect" structure is attached to an "inodedep" when a new block
- * or fragment is allocated and pointed to by the inode described by
- * "inodedep". The worklist is linked to the buffer that holds the block.
- * When the block is first allocated, it is linked to the bmsafemap
- * structure associated with the buffer holding the cylinder group map
- * from which it was allocated. When the cylinder group map is written
- * to disk, ad_state has the DEPCOMPLETE flag set. When the block itself
- * is written, the COMPLETE flag is set. Once both the cylinder group map
- * and the data itself have been written, it is safe to write the inode
- * that claims the block. If there was a previous fragment that had been
- * allocated before the file was increased in size, the old fragment may
- * be freed once the inode claiming the new block is written to disk.
- * This ad_fragfree request is attached to the id_inowait list of the
- * associated inodedep (pointed to by ad_inodedep) for processing after
- * the inode is written. When a block is allocated to a directory, an
- * fsync of a file whose name is within that block must ensure not only
- * that the block containing the file name has been written, but also
- * that the on-disk inode references that block. When a new directory
- * block is created, we allocate a newdirblk structure which is linked
- * to the associated allocdirect (on its ad_newdirblk list). When the
- * allocdirect has been satisfied, the newdirblk structure is moved to
- * the inodedep id_bufwait list of its directory to await the inode
- * being written. When the inode is written, the directory entries are
- * fully committed and can be deleted from their pagedep->id_pendinghd
- * and inodedep->id_pendinghd lists.
- */
-struct allocdirect {
-	struct	worklist ad_list;	/* buffer holding block */
-#	define	ad_state ad_list.wk_state /* block pointer state */
-	TAILQ_ENTRY(allocdirect) ad_next; /* inodedep's list of allocdirect's */
-	daddr_t ad_lbn;		/* block within file */
-	daddr_t ad_newblkno;		/* new value of block pointer */
-	daddr_t ad_oldblkno;		/* old value of block pointer */
-	long	ad_newsize;		/* size of new block */
-	long	ad_oldsize;		/* size of old block */
-	LIST_ENTRY(allocdirect) ad_deps; /* bmsafemap's list of allocdirect's */
-	struct	buf *ad_buf;		/* cylgrp buffer (if pending) */
-	struct	inodedep *ad_inodedep;	/* associated inodedep */
-	struct	freefrag *ad_freefrag;	/* fragment to be freed (if any) */
-	struct	workhead ad_newdirblk;	/* dir block to notify when written */
-};
-
-/*
- * A single "indirdep" structure manages all allocation dependencies for
- * pointers in an indirect block. The up-to-date state of the indirect
- * block is stored in ir_savedata. The set of pointers that may be safely
- * written to the disk is stored in ir_safecopy. The state field is used
- * only to track whether the buffer is currently being written (in which
- * case it is not safe to update ir_safecopy). Ir_deplisthd contains the
- * list of allocindir structures, one for each block that needs to be
- * written to disk. Once the block and its bitmap allocation have been
- * written the safecopy can be updated to reflect the allocation and the
- * allocindir structure freed. If ir_state indicates that an I/O on the
- * indirect block is in progress when ir_safecopy is to be updated, the
- * update is deferred by placing the allocindir on the ir_donehd list.
- * When the I/O on the indirect block completes, the entries on the
- * ir_donehd list are processed by updating their corresponding ir_safecopy
- * pointers and then freeing the allocindir structure.
- */
-struct indirdep {
-	struct	worklist ir_list;	/* buffer holding indirect block */
-#	define	ir_state ir_list.wk_state /* indirect block pointer state */
-	caddr_t ir_saveddata;		/* buffer cache contents */
-	struct	buf *ir_savebp;		/* buffer holding safe copy */
-	struct	allocindirhd ir_donehd;	/* done waiting to update safecopy */
-	struct	allocindirhd ir_deplisthd; /* allocindir deps for this block */
-};
-
-/*
- * An "allocindir" structure is attached to an "indirdep" when a new block
- * is allocated and pointed to by the indirect block described by the
- * "indirdep". The worklist is linked to the buffer that holds the new block.
- * When the block is first allocated, it is linked to the bmsafemap
- * structure associated with the buffer holding the cylinder group map
- * from which it was allocated. When the cylinder group map is written
- * to disk, ai_state has the DEPCOMPLETE flag set. When the block itself
- * is written, the COMPLETE flag is set. Once both the cylinder group map
- * and the data itself have been written, it is safe to write the entry in
- * the indirect block that claims the block; the "allocindir" dependency 
- * can then be freed as it is no longer applicable.
- */
-struct allocindir {
-	struct	worklist ai_list;	/* buffer holding indirect block */
-#	define	ai_state ai_list.wk_state /* indirect block pointer state */
-	LIST_ENTRY(allocindir) ai_next;	/* indirdep's list of allocindir's */
-	int	ai_offset;		/* pointer offset in indirect block */
-	daddr_t ai_newblkno;		/* new block pointer value */
-	daddr_t ai_oldblkno;		/* old block pointer value */
-	struct	freefrag *ai_freefrag;	/* block to be freed when complete */
-	struct	indirdep *ai_indirdep;	/* address of associated indirdep */
-	LIST_ENTRY(allocindir) ai_deps;	/* bmsafemap's list of allocindir's */
-	struct	buf *ai_buf;		/* cylgrp buffer (if pending) */
-};
-
-/*
- * A "freefrag" structure is attached to an "inodedep" when a previously
- * allocated fragment is replaced with a larger fragment, rather than extended.
- * The "freefrag" structure is constructed and attached when the replacement
- * block is first allocated. It is processed after the inode claiming the
- * bigger block that replaces it has been written to disk. Note that the
- * ff_state field is used to store the uid, so may lose data. However,
- * the uid is used only in printing an error message, so is not critical.
- * Keeping it in a short keeps the data structure down to 32 bytes.
- */
-struct freefrag {
-	struct	worklist ff_list;	/* id_inowait or delayed worklist */
-#	define	ff_state ff_list.wk_state /* owning user; should be uid_t */
-	struct	vnode *ff_devvp;	/* filesystem device vnode */
-	struct	mount *ff_mnt;		/* associated mount point */
-	daddr_t ff_blkno;		/* fragment physical block number */
-	long	ff_fragsize;		/* size of fragment being deleted */
-	ufsino_t	ff_inum;	/* owning inode number */
-};
-
-/*
- * A "freeblks" structure is attached to an "inodedep" when the
- * corresponding file's length is reduced to zero. It records all
- * the information needed to free the blocks of a file after its
- * zero'ed inode has been written to disk.
- */
-struct freeblks {
-	struct	worklist fb_list;	/* id_inowait or delayed worklist */
-#	define	fb_state fb_list.wk_state /* inode and dirty block state */
-	ufsino_t	fb_previousinum; /* inode of previous owner of blocks */
-	struct	vnode *fb_devvp;	/* filesystem device vnode */
-	struct	mount *fb_mnt;		/* associated mount point */
-	off_t	fb_oldsize;		/* previous file size */
-	off_t	fb_newsize;		/* new file size */
-	int	fb_chkcnt;		/* used to check cnt of blks released */
-	uid_t	fb_uid;			/* uid of previous owner of blocks */
-	daddr_t fb_dblks[NDADDR];	/* direct blk ptrs to deallocate */
-	daddr_t fb_iblks[NIADDR];	/* indirect blk ptrs to deallocate */
-};
-
-/*
- * A "freefile" structure is attached to an inode when its
- * link count is reduced to zero. It marks the inode as free in
- * the cylinder group map after the zero'ed inode has been written
- * to disk and any associated blocks and fragments have been freed.
- */
-struct freefile {
-	struct	worklist fx_list;	/* id_inowait or delayed worklist */
-	mode_t	fx_mode;		/* mode of inode */
-	ufsino_t	fx_oldinum;	/* inum of the unlinked file */
-	struct	vnode *fx_devvp;	/* filesystem device vnode */
-	struct	mount *fx_mnt;		/* associated mount point */
-};
-
-/*
- * A "diradd" structure is linked to an "inodedep" id_inowait list when a
- * new directory entry is allocated that references the inode described
- * by "inodedep". When the inode itself is written (either the initial
- * allocation for new inodes or with the increased link count for
- * existing inodes), the COMPLETE flag is set in da_state. If the entry
- * is for a newly allocated inode, the "inodedep" structure is associated
- * with a bmsafemap which prevents the inode from being written to disk
- * until the cylinder group has been updated. Thus the da_state COMPLETE
- * flag cannot be set until the inode bitmap dependency has been removed.
- * When creating a new file, it is safe to write the directory entry that
- * claims the inode once the referenced inode has been written. Since
- * writing the inode clears the bitmap dependencies, the DEPCOMPLETE flag
- * in the diradd can be set unconditionally when creating a file. When
- * creating a directory, there are two additional dependencies described by
- * mkdir structures (see their description below). When these dependencies
- * are resolved the DEPCOMPLETE flag is set in the diradd structure.
- * If there are multiple links created to the same inode, there will be
- * a separate diradd structure created for each link. The diradd is
- * linked onto the pg_diraddhd list of the pagedep for the directory
- * page that contains the entry. When a directory page is written,
- * the pg_diraddhd list is traversed to rollback any entries that are
- * not yet ready to be written to disk. If a directory entry is being
- * changed (by rename) rather than added, the DIRCHG flag is set and
- * the da_previous entry points to the entry that will be "removed"
- * once the new entry has been committed. During rollback, entries
- * with da_previous are replaced with the previous inode number rather
- * than zero.
- *
- * The overlaying of da_pagedep and da_previous is done to keep the
- * structure down to 32 bytes in size on a 32-bit machine. If a
- * da_previous entry is present, the pointer to its pagedep is available
- * in the associated dirrem entry. If the DIRCHG flag is set, the
- * da_previous entry is valid; if not set the da_pagedep entry is valid.
- * The DIRCHG flag never changes; it is set when the structure is created
- * if appropriate and is never cleared.
- */
-struct diradd {
-	struct	worklist da_list;	/* id_inowait or id_pendinghd list */
-#	define	da_state da_list.wk_state /* state of the new directory entry */
-	LIST_ENTRY(diradd) da_pdlist;	/* pagedep holding directory block */
-	doff_t	da_offset;		/* offset of new dir entry in dir blk */
-	ufsino_t	da_newinum;	/* inode number for the new dir entry */
-	union {
-	struct	dirrem *dau_previous;	/* entry being replaced in dir change */
-	struct	pagedep *dau_pagedep;	/* pagedep dependency for addition */
-	} da_un;
-};
-#define da_previous da_un.dau_previous
-#define da_pagedep da_un.dau_pagedep
-
-/*
- * Two "mkdir" structures are needed to track the additional dependencies
- * associated with creating a new directory entry. Normally a directory
- * addition can be committed as soon as the newly referenced inode has been
- * written to disk with its increased link count. When a directory is
- * created there are two additional dependencies: writing the directory
- * data block containing the "." and ".." entries (MKDIR_BODY) and writing
- * the parent inode with the increased link count for ".." (MKDIR_PARENT).
- * These additional dependencies are tracked by two mkdir structures that
- * reference the associated "diradd" structure. When they have completed,
- * they set the DEPCOMPLETE flag on the diradd so that it knows that its
- * extra dependencies have been completed. The md_state field is used only
- * to identify which type of dependency the mkdir structure is tracking.
- * It is not used in the mainline code for any purpose other than consistency
- * checking. All the mkdir structures in the system are linked together on
- * a list. This list is needed so that a diradd can find its associated
- * mkdir structures and deallocate them if it is prematurely freed (as for
- * example if a mkdir is immediately followed by a rmdir of the same directory).
- * Here, the free of the diradd must traverse the list to find the associated
- * mkdir structures that reference it. The deletion would be faster if the
- * diradd structure were simply augmented to have two pointers that referenced
- * the associated mkdir's. However, this would increase the size of the diradd
- * structure from 32 to 64-bits to speed a very infrequent operation.
- */
-struct mkdir {
-	struct	worklist md_list;	/* id_inowait or buffer holding dir */
-#	define	md_state md_list.wk_state /* type: MKDIR_PARENT or MKDIR_BODY */
-	struct	diradd *md_diradd;	/* associated diradd */
-	struct	buf *md_buf;		/* MKDIR_BODY: buffer holding dir */
-	LIST_ENTRY(mkdir) md_mkdirs;	/* list of all mkdirs */
-};
-LIST_HEAD(mkdirlist, mkdir) mkdirlisthd;
-
-/*
- * A "dirrem" structure describes an operation to decrement the link
- * count on an inode. The dirrem structure is attached to the pg_dirremhd
- * list of the pagedep for the directory page that contains the entry.
- * It is processed after the directory page with the deleted entry has
- * been written to disk.
- *
- * The overlaying of dm_pagedep and dm_dirinum is done to keep the
- * structure down to 32 bytes in size on a 32-bit machine. It works
- * because they are never used concurrently.
- */
-struct dirrem {
-	struct	worklist dm_list;	/* delayed worklist */
-#	define	dm_state dm_list.wk_state /* state of the old directory entry */
-	LIST_ENTRY(dirrem) dm_next;	/* pagedep's list of dirrem's */
-	struct	mount *dm_mnt;		/* associated mount point */
-	ufsino_t	dm_oldinum;	/* inum of the removed dir entry */
-	union {
-	struct	pagedep *dmu_pagedep;	/* pagedep dependency for remove */
-	ufsino_t	dmu_dirinum;	/* parent inode number (for rmdir) */
-	} dm_un;
-};
-#define dm_pagedep dm_un.dmu_pagedep
-#define dm_dirinum dm_un.dmu_dirinum
-
-
-/*
- * A "newdirblk" structure tracks the progress of a newly allocated
- * directory block from its creation until it is claimed by its on-disk
- * inode. When a block is allocated to a directory, an fsync of a file
- * whose name is within that block must ensure not only that the block
- * containing the file name has been written, but also that the on-disk
- * inode references that block. When a new directory block is created,
- * we allocate a newdirblk structure which is linked to the associated
- * allocdirect (on its ad_newdirblk list). When the allocdirect has been
- * satisfied, the newdirblk structure is moved to the inodedep id_bufwait
- * list of its directory to await the inode being written. When the inode
- * is written, the directory entries are fully committed and can be
- * deleted from their pagedep->id_pendinghd and inodedep->id_pendinghd
- * lists. Note that we could track directory blocks allocated to indirect
- * blocks using a similar scheme with the allocindir structures. Rather
- * than adding this level of complexity, we simply write those newly 
- * allocated indirect blocks synchronously as such allocations are rare.
- */
-struct newdirblk {
-	struct	worklist db_list;/* id_inowait or pg_newdirblk */
-#	define	db_state db_list.wk_state /* unused */
-	struct	pagedep *db_pagedep;/* associated pagedep */
-};