Import work done under project/nand (@235533) into head.

The NAND Flash environment consists of several distinct components:
  - NAND framework (drivers harness for NAND controllers and NAND chips)
  - NAND simulator (NANDsim)
  - NAND file system (NAND FS)
  - Companion tools and utilities
  - Documentation (manual pages)

This work is still experimental. Please use with caution.

Obtained from: Semihalf
Supported by:  FreeBSD Foundation, Juniper Networks

1 files changed, 2455 insertions, 0 deletions

diff --git a/sys/fs/nandfs/nandfs_vnops.c b/sys/fs/nandfs/nandfs_vnops.c
new file mode 100644
index 0000000..b226d30
--- /dev/null
+++ b/sys/fs/nandfs/nandfs_vnops.c
@@ -0,0 +1,2455 @@
+/*-
+ * Copyright (c) 2010-2012 Semihalf
+ * Copyright (c) 2008, 2009 Reinoud Zandijk
+ * All rights reserved.
+ *
+ * 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 THE AUTHOR ``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 THE AUTHOR 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: NetBSD: nilfs_vnops.c,v 1.2 2009/08/26 03:40:48 elad
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/lockf.h>
+#include <sys/malloc.h>
+#include <sys/mount.h>
+#include <sys/mutex.h>
+#include <sys/namei.h>
+#include <sys/sysctl.h>
+#include <sys/unistd.h>
+#include <sys/vnode.h>
+#include <sys/buf.h>
+#include <sys/bio.h>
+#include <sys/fcntl.h>
+#include <sys/dirent.h>
+#include <sys/stat.h>
+#include <sys/priv.h>
+
+#include <vm/vm.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_object.h>
+#include <vm/vnode_pager.h>
+
+#include <machine/_inttypes.h>
+
+#include <fs/nandfs/nandfs_mount.h>
+#include <fs/nandfs/nandfs.h>
+#include <fs/nandfs/nandfs_subr.h>
+
+extern uma_zone_t nandfs_node_zone;
+static void nandfs_read_filebuf(struct nandfs_node *, struct buf *);
+static void nandfs_itimes_locked(struct vnode *);
+static int nandfs_truncate(struct vnode *, uint64_t);
+
+static vop_pathconf_t	nandfs_pathconf;
+
+#define UPDATE_CLOSE 0
+#define UPDATE_WAIT 0
+
+static int
+nandfs_inactive(struct vop_inactive_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	int error = 0;
+
+	DPRINTF(VNCALL, ("%s: vp:%p node:%p\n", __func__, vp, node));
+
+	if (node == NULL) {
+		DPRINTF(NODE, ("%s: inactive NULL node\n", __func__));
+		return (0);
+	}
+
+	if (node->nn_inode.i_mode != 0 && !(node->nn_inode.i_links_count)) {
+		nandfs_truncate(vp, 0);
+		error = nandfs_node_destroy(node);
+		if (error)
+			nandfs_error("%s: destroy node: %p\n", __func__, node);
+		node->nn_flags = 0;
+		vrecycle(vp);
+	}
+
+	return (error);
+}
+
+static int
+nandfs_reclaim(struct vop_reclaim_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *nandfs_node = VTON(vp);
+	struct nandfs_device *fsdev = nandfs_node->nn_nandfsdev;
+	uint64_t ino = nandfs_node->nn_ino;
+
+	DPRINTF(VNCALL, ("%s: vp:%p node:%p\n", __func__, vp, nandfs_node));
+
+	/* Invalidate all entries to a particular vnode. */
+	cache_purge(vp);
+
+	/* Destroy the vm object and flush associated pages. */
+	vnode_destroy_vobject(vp);
+
+	/* Remove from vfs hash if not system vnode */
+	if (!NANDFS_SYS_NODE(nandfs_node->nn_ino))
+		vfs_hash_remove(vp);
+
+	/* Dispose all node knowledge */
+	nandfs_dispose_node(&nandfs_node);
+
+	if (!NANDFS_SYS_NODE(ino))
+		NANDFS_WRITEUNLOCK(fsdev);
+
+	return (0);
+}
+
+static int
+nandfs_read(struct vop_read_args *ap)
+{
+	register struct vnode *vp = ap->a_vp;
+	register struct nandfs_node *node = VTON(vp);
+	struct nandfs_device *nandfsdev = node->nn_nandfsdev;
+	struct uio *uio = ap->a_uio;
+	struct buf *bp;
+	uint64_t size;
+	uint32_t blocksize;
+	off_t bytesinfile;
+	ssize_t toread, off;
+	daddr_t lbn;
+	ssize_t resid;
+	int error = 0;
+
+	if (uio->uio_resid == 0)
+		return (0);
+
+	size = node->nn_inode.i_size;
+	if (uio->uio_offset >= size)
+		return (0);
+
+	blocksize = nandfsdev->nd_blocksize;
+	bytesinfile = size - uio->uio_offset;
+
+	resid = omin(uio->uio_resid, bytesinfile);
+
+	while (resid) {
+		lbn = uio->uio_offset / blocksize;
+		off = uio->uio_offset & (blocksize - 1);
+
+		toread = omin(resid, blocksize - off);
+
+		DPRINTF(READ, ("nandfs_read bn: 0x%jx toread: 0x%zx (0x%x)\n",
+		    (uintmax_t)lbn, toread, blocksize));
+
+		error = nandfs_bread(node, lbn, NOCRED, 0, &bp);
+		if (error) {
+			brelse(bp);
+			break;
+		}
+
+		error = uiomove(bp->b_data + off, toread, uio);
+		if (error) {
+			brelse(bp);
+			break;
+		}
+
+		brelse(bp);
+		resid -= toread;
+	}
+
+	return (error);
+}
+
+static int
+nandfs_write(struct vop_write_args *ap)
+{
+	struct nandfs_device *fsdev;
+	struct nandfs_node *node;
+	struct vnode *vp;
+	struct uio *uio;
+	struct buf *bp;
+	uint64_t file_size, vblk;
+	uint32_t blocksize;
+	ssize_t towrite, off;
+	daddr_t lbn;
+	ssize_t resid;
+	int error, ioflag, modified;
+
+	vp = ap->a_vp;
+	uio = ap->a_uio;
+	ioflag = ap->a_ioflag;
+	node = VTON(vp);
+	fsdev = node->nn_nandfsdev;
+
+	if (nandfs_fs_full(fsdev))
+		return (ENOSPC);
+
+	DPRINTF(WRITE, ("nandfs_write called %#zx at %#jx\n",
+	    uio->uio_resid, (uintmax_t)uio->uio_offset));
+
+	if (uio->uio_offset < 0)
+		return (EINVAL);
+	if (uio->uio_resid == 0)
+		return (0);
+
+	blocksize = fsdev->nd_blocksize;
+	file_size = node->nn_inode.i_size;
+
+	switch (vp->v_type) {
+	case VREG:
+		if (ioflag & IO_APPEND)
+			uio->uio_offset = file_size;
+		break;
+	case VDIR:
+		return (EISDIR);
+	case VLNK:
+		break;
+	default:
+		panic("%s: bad file type vp: %p", __func__, vp);
+	}
+
+	/* If explicitly asked to append, uio_offset can be wrong? */
+	if (ioflag & IO_APPEND)
+		uio->uio_offset = file_size;
+
+	resid = uio->uio_resid;
+	modified = error = 0;
+
+	while (uio->uio_resid) {
+		lbn = uio->uio_offset / blocksize;
+		off = uio->uio_offset & (blocksize - 1);
+
+		towrite = omin(uio->uio_resid, blocksize - off);
+
+		DPRINTF(WRITE, ("%s: lbn: 0x%jd toread: 0x%zx (0x%x)\n",
+		    __func__, (uintmax_t)lbn, towrite, blocksize));
+
+		error = nandfs_bmap_lookup(node, lbn, &vblk);
+		if (error)
+			break;
+
+		DPRINTF(WRITE, ("%s: lbn: 0x%jd toread: 0x%zx (0x%x) "
+		    "vblk=%jx\n", __func__, (uintmax_t)lbn, towrite, blocksize,
+		    vblk));
+
+		if (vblk != 0)
+			error = nandfs_bread(node, lbn, NOCRED, 0, &bp);
+		else
+			error = nandfs_bcreate(node, lbn, NOCRED, 0, &bp);
+
+		DPRINTF(WRITE, ("%s: vp %p bread bp %p lbn %#jx\n", __func__,
+		    vp, bp, (uintmax_t)lbn));
+		if (error) {
+			if (bp)
+				brelse(bp);
+			break;
+		}
+
+		error = uiomove((char *)bp->b_data + off, (int)towrite, uio);
+		if (error)
+			break;
+
+		error = nandfs_dirty_buf(bp, 0);
+		if (error)
+			break;
+
+		modified++;
+	}
+
+	/* XXX proper handling when only part of file was properly written */
+	if (modified) {
+		if (resid > uio->uio_resid && ap->a_cred &&
+		    ap->a_cred->cr_uid != 0)
+			node->nn_inode.i_mode &= ~(ISUID | ISGID);
+
+		if (file_size < uio->uio_offset + uio->uio_resid) {
+			node->nn_inode.i_size = uio->uio_offset +
+			    uio->uio_resid;
+			node->nn_flags |= IN_CHANGE | IN_UPDATE;
+			vnode_pager_setsize(vp, uio->uio_offset +
+			    uio->uio_resid);
+			nandfs_itimes(vp);
+		}
+	}
+
+	DPRINTF(WRITE, ("%s: return:%d\n", __func__, error));
+
+	return (error);
+}
+
+static int
+nandfs_lookup(struct vop_cachedlookup_args *ap)
+{
+	struct vnode *dvp, **vpp;
+	struct componentname *cnp;
+	struct ucred *cred;
+	struct thread *td;
+	struct nandfs_node *dir_node, *node;
+	struct nandfsmount *nmp;
+	uint64_t ino, off;
+	const char *name;
+	int namelen, nameiop, islastcn, mounted_ro;
+	int error, found;
+
+	DPRINTF(VNCALL, ("%s\n", __func__));
+
+	dvp = ap->a_dvp;
+	vpp = ap->a_vpp;
+	*vpp = NULL;
+
+	cnp = ap->a_cnp;
+	cred = cnp->cn_cred;
+	td = cnp->cn_thread;
+
+	dir_node = VTON(dvp);
+	nmp = dir_node->nn_nmp;
+
+	/* Simplify/clarification flags */
+	nameiop = cnp->cn_nameiop;
+	islastcn = cnp->cn_flags & ISLASTCN;
+	mounted_ro = dvp->v_mount->mnt_flag & MNT_RDONLY;
+
+	/*
+	 * If requesting a modify on the last path element on a read-only
+	 * filingsystem, reject lookup;
+	 */
+	if (islastcn && mounted_ro && (nameiop == DELETE || nameiop == RENAME))
+		return (EROFS);
+
+	if (dir_node->nn_inode.i_links_count == 0)
+		return (ENOENT);
+
+	/*
+	 * Obviously, the file is not (anymore) in the namecache, we have to
+	 * search for it. There are three basic cases: '.', '..' and others.
+	 *
+	 * Following the guidelines of VOP_LOOKUP manpage and tmpfs.
+	 */
+	error = 0;
+	if ((cnp->cn_namelen == 1) && (cnp->cn_nameptr[0] == '.')) {
+		DPRINTF(LOOKUP, ("\tlookup '.'\n"));
+		/* Special case 1 '.' */
+		VREF(dvp);
+		*vpp = dvp;
+		/* Done */
+	} else if (cnp->cn_flags & ISDOTDOT) {
+		/* Special case 2 '..' */
+		DPRINTF(LOOKUP, ("\tlookup '..'\n"));
+
+		/* Get our node */
+		name = "..";
+		namelen = 2;
+		error = nandfs_lookup_name_in_dir(dvp, name, namelen, &ino,
+		    &found, &off);
+		if (error)
+			goto out;
+		if (!found)
+			error = ENOENT;
+
+		/* First unlock parent */
+		VOP_UNLOCK(dvp, 0);
+
+		if (error == 0) {
+			DPRINTF(LOOKUP, ("\tfound '..'\n"));
+			/* Try to create/reuse the node */
+			error = nandfs_get_node(nmp, ino, &node);
+
+			if (!error) {
+				DPRINTF(LOOKUP,
+				    ("\tnode retrieved/created OK\n"));
+				*vpp = NTOV(node);
+			}
+		}
+
+		/* Try to relock parent */
+		vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
+	} else {
+		DPRINTF(LOOKUP, ("\tlookup file\n"));
+		/* All other files */
+		/* Look up filename in the directory returning its inode */
+		name = cnp->cn_nameptr;
+		namelen = cnp->cn_namelen;
+		error = nandfs_lookup_name_in_dir(dvp, name, namelen,
+		    &ino, &found, &off);
+		if (error)
+			goto out;
+		if (!found) {
+			DPRINTF(LOOKUP, ("\tNOT found\n"));
+			/*
+			 * UGH, didn't find name. If we're creating or
+			 * renaming on the last name this is OK and we ought
+			 * to return EJUSTRETURN if its allowed to be created.
+			 */
+			error = ENOENT;
+			if ((nameiop == CREATE || nameiop == RENAME) &&
+			    islastcn) {
+				error = VOP_ACCESS(dvp, VWRITE, cred,
+				    td);
+				if (!error) {
+					/* keep the component name */
+					cnp->cn_flags |= SAVENAME;
+					error = EJUSTRETURN;
+				}
+			}
+			/* Done */
+		} else {
+			if (ino == NANDFS_WHT_INO)
+				cnp->cn_flags |= ISWHITEOUT;
+
+			if ((cnp->cn_flags & ISWHITEOUT) &&
+			    (nameiop == LOOKUP))
+				return (ENOENT);
+
+			if ((nameiop == DELETE) && islastcn) {
+				if ((cnp->cn_flags & ISWHITEOUT) &&
+				    (cnp->cn_flags & DOWHITEOUT)) {
+					cnp->cn_flags |= SAVENAME;
+					dir_node->nn_diroff = off;
+					return (EJUSTRETURN);
+				}
+
+				error = VOP_ACCESS(dvp, VWRITE, cred,
+				    cnp->cn_thread);
+				if (error)
+					return (error);
+
+				/* Try to create/reuse the node */
+				error = nandfs_get_node(nmp, ino, &node);
+				if (!error) {
+					*vpp = NTOV(node);
+					node->nn_diroff = off;
+				}
+
+				if ((dir_node->nn_inode.i_mode & ISVTX) &&
+				    cred->cr_uid != 0 &&
+				    cred->cr_uid != dir_node->nn_inode.i_uid &&
+				    node->nn_inode.i_uid != cred->cr_uid) {
+					vput(*vpp);
+					*vpp = NULL;
+					return (EPERM);
+				}
+			} else if ((nameiop == RENAME) && islastcn) {
+				error = VOP_ACCESS(dvp, VWRITE, cred,
+				    cnp->cn_thread);
+				if (error)
+					return (error);
+
+				/* Try to create/reuse the node */
+				error = nandfs_get_node(nmp, ino, &node);
+				if (!error) {
+					*vpp = NTOV(node);
+					node->nn_diroff = off;
+				}
+			} else {
+				/* Try to create/reuse the node */
+				error = nandfs_get_node(nmp, ino, &node);
+				if (!error) {
+					*vpp = NTOV(node);
+					node->nn_diroff = off;
+				}
+			}
+		}
+	}
+
+out:
+	/*
+	 * Store result in the cache if requested. If we are creating a file,
+	 * the file might not be found and thus putting it into the namecache
+	 * might be seen as negative caching.
+	 */
+	if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE)
+		cache_enter(dvp, *vpp, cnp);
+
+	return (error);
+
+}
+
+static int
+nandfs_getattr(struct vop_getattr_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct vattr *vap = ap->a_vap;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_inode *inode = &node->nn_inode;
+
+	DPRINTF(VNCALL, ("%s: vp: %p\n", __func__, vp));
+	nandfs_itimes(vp);
+
+	/* Basic info */
+	VATTR_NULL(vap);
+	vap->va_atime.tv_sec = inode->i_mtime;
+	vap->va_atime.tv_nsec = inode->i_mtime_nsec;
+	vap->va_mtime.tv_sec = inode->i_mtime;
+	vap->va_mtime.tv_nsec = inode->i_mtime_nsec;
+	vap->va_ctime.tv_sec = inode->i_ctime;
+	vap->va_ctime.tv_nsec = inode->i_ctime_nsec;
+	vap->va_type = IFTOVT(inode->i_mode);
+	vap->va_mode = inode->i_mode & ~S_IFMT;
+	vap->va_nlink = inode->i_links_count;
+	vap->va_uid = inode->i_uid;
+	vap->va_gid = inode->i_gid;
+	vap->va_rdev = inode->i_special;
+	vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
+	vap->va_fileid = node->nn_ino;
+	vap->va_size = inode->i_size;
+	vap->va_blocksize = node->nn_nandfsdev->nd_blocksize;
+	vap->va_gen = 0;
+	vap->va_flags = inode->i_flags;
+	vap->va_bytes = inode->i_blocks * vap->va_blocksize;
+	vap->va_filerev = 0;
+	vap->va_vaflags = 0;
+
+	return (0);
+}
+
+static int
+nandfs_vtruncbuf(struct vnode *vp, uint64_t nblks)
+{
+	struct nandfs_device *nffsdev;
+	struct bufobj *bo;
+	struct buf *bp, *nbp;
+
+	bo = &vp->v_bufobj;
+	nffsdev = VTON(vp)->nn_nandfsdev;
+
+	ASSERT_VOP_LOCKED(vp, "nandfs_truncate");
+restart:
+	BO_LOCK(bo);
+restart_locked:
+	TAILQ_FOREACH_SAFE(bp, &bo->bo_clean.bv_hd, b_bobufs, nbp) {
+		if (bp->b_lblkno < nblks)
+			continue;
+		if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL))
+			goto restart_locked;
+
+		bremfree(bp);
+		bp->b_flags |= (B_INVAL | B_RELBUF);
+		bp->b_flags &= ~(B_ASYNC | B_MANAGED);
+		BO_UNLOCK(bo);
+		brelse(bp);
+		BO_LOCK(bo);
+	}
+
+	TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
+		if (bp->b_lblkno < nblks)
+			continue;
+		if (BUF_LOCK(bp,
+		    LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
+		    BO_MTX(bo)) == ENOLCK)
+			goto restart;
+		bp->b_flags |= (B_INVAL | B_RELBUF);
+		bp->b_flags &= ~(B_ASYNC | B_MANAGED);
+		brelse(bp);
+		nandfs_dirty_bufs_decrement(nffsdev);
+		BO_LOCK(bo);
+	}
+
+	BO_UNLOCK(bo);
+
+	return (0);
+}
+
+static int
+nandfs_truncate(struct vnode *vp, uint64_t newsize)
+{
+	struct nandfs_device *nffsdev;
+	struct nandfs_node *node;
+	struct nandfs_inode *inode;
+	struct buf *bp = NULL;
+	uint64_t oblks, nblks, vblk, size, rest;
+	int error;
+
+	node = VTON(vp);
+	nffsdev = node->nn_nandfsdev;
+	inode = &node->nn_inode;
+
+	/* Calculate end of file */
+	size = inode->i_size;
+
+	if (newsize == size) {
+		node->nn_flags |= IN_CHANGE | IN_UPDATE;
+		nandfs_itimes(vp);
+		return (0);
+	}
+
+	if (newsize > size) {
+		inode->i_size = newsize;
+		vnode_pager_setsize(vp, newsize);
+		node->nn_flags |= IN_CHANGE | IN_UPDATE;
+		nandfs_itimes(vp);
+		return (0);
+	}
+
+	nblks = howmany(newsize, nffsdev->nd_blocksize);
+	oblks = howmany(size, nffsdev->nd_blocksize);
+	rest = newsize % nffsdev->nd_blocksize;
+
+	if (rest) {
+		error = nandfs_bmap_lookup(node, nblks - 1, &vblk);
+		if (error)
+			return (error);
+
+		if (vblk != 0)
+			error = nandfs_bread(node, nblks - 1, NOCRED, 0, &bp);
+		else
+			error = nandfs_bcreate(node, nblks - 1, NOCRED, 0, &bp);
+
+		if (error) {
+			if (bp)
+				brelse(bp);
+			return (error);
+		}
+
+		bzero((char *)bp->b_data + rest,
+		    (u_int)(nffsdev->nd_blocksize - rest));
+		error = nandfs_dirty_buf(bp, 0);
+		if (error)
+			return (error);
+	}
+
+	DPRINTF(VNCALL, ("%s: vp %p oblks %jx nblks %jx\n", __func__, vp, oblks,
+	    nblks));
+
+	error = nandfs_bmap_truncate_mapping(node, oblks - 1, nblks - 1);
+	if (error) {
+		if (bp)
+			nandfs_undirty_buf(bp);
+		return (error);
+	}
+
+	error = nandfs_vtruncbuf(vp, nblks);
+	if (error) {
+		if (bp)
+			nandfs_undirty_buf(bp);
+		return (error);
+	}
+
+	inode->i_size = newsize;
+	vnode_pager_setsize(vp, newsize);
+	node->nn_flags |= IN_CHANGE | IN_UPDATE;
+	nandfs_itimes(vp);
+
+	return (error);
+}
+
+static void
+nandfs_itimes_locked(struct vnode *vp)
+{
+	struct nandfs_node *node;
+	struct nandfs_inode *inode;
+	struct timespec ts;
+
+	ASSERT_VI_LOCKED(vp, __func__);
+
+	node = VTON(vp);
+	inode = &node->nn_inode;
+
+	if ((node->nn_flags & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0)
+		return;
+
+	if (((vp->v_mount->mnt_kern_flag &
+	    (MNTK_SUSPENDED | MNTK_SUSPEND)) == 0) ||
+	    (node->nn_flags & (IN_CHANGE | IN_UPDATE)))
+		node->nn_flags |= IN_MODIFIED;
+
+	vfs_timestamp(&ts);
+	if (node->nn_flags & IN_UPDATE) {
+		inode->i_mtime = ts.tv_sec;
+		inode->i_mtime_nsec = ts.tv_nsec;
+	}
+	if (node->nn_flags & IN_CHANGE) {
+		inode->i_ctime = ts.tv_sec;
+		inode->i_ctime_nsec = ts.tv_nsec;
+	}
+
+	node->nn_flags &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE);
+}
+
+void
+nandfs_itimes(struct vnode *vp)
+{
+
+	VI_LOCK(vp);
+	nandfs_itimes_locked(vp);
+	VI_UNLOCK(vp);
+}
+
+static int
+nandfs_chmod(struct vnode *vp, int mode, struct ucred *cred, struct thread *td)
+{
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_inode *inode = &node->nn_inode;
+	uint16_t nmode;
+	int error = 0;
+
+	DPRINTF(VNCALL, ("%s: vp %p, mode %x, cred %p, td %p\n", __func__, vp,
+	    mode, cred, td));
+	/*
+	 * To modify the permissions on a file, must possess VADMIN
+	 * for that file.
+	 */
+	if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
+		return (error);
+
+	/*
+	 * Privileged processes may set the sticky bit on non-directories,
+	 * as well as set the setgid bit on a file with a group that the
+	 * process is not a member of. Both of these are allowed in
+	 * jail(8).
+	 */
+	if (vp->v_type != VDIR && (mode & S_ISTXT)) {
+		if (priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0))
+			return (EFTYPE);
+	}
+	if (!groupmember(inode->i_gid, cred) && (mode & ISGID)) {
+		error = priv_check_cred(cred, PRIV_VFS_SETGID, 0);
+		if (error)
+			return (error);
+	}
+
+	/*
+	 * Deny setting setuid if we are not the file owner.
+	 */
+	if ((mode & ISUID) && inode->i_uid != cred->cr_uid) {
+		error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
+		if (error)
+			return (error);
+	}
+
+	nmode = inode->i_mode;
+	nmode &= ~ALLPERMS;
+	nmode |= (mode & ALLPERMS);
+	inode->i_mode = nmode;
+	node->nn_flags |= IN_CHANGE;
+
+	DPRINTF(VNCALL, ("%s: to mode %x\n", __func__, nmode));
+
+	return (error);
+}
+
+static int
+nandfs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred,
+    struct thread *td)
+{
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_inode *inode = &node->nn_inode;
+	uid_t ouid;
+	gid_t ogid;
+	int error = 0;
+
+	if (uid == (uid_t)VNOVAL)
+		uid = inode->i_uid;
+	if (gid == (gid_t)VNOVAL)
+		gid = inode->i_gid;
+	/*
+	 * To modify the ownership of a file, must possess VADMIN for that
+	 * file.
+	 */
+	if ((error = VOP_ACCESSX(vp, VWRITE_OWNER, cred, td)))
+		return (error);
+	/*
+	 * To change the owner of a file, or change the group of a file to a
+	 * group of which we are not a member, the caller must have
+	 * privilege.
+	 */
+	if (((uid != inode->i_uid && uid != cred->cr_uid) ||
+	    (gid != inode->i_gid && !groupmember(gid, cred))) &&
+	    (error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0)))
+		return (error);
+	ogid = inode->i_gid;
+	ouid = inode->i_uid;
+
+	inode->i_gid = gid;
+	inode->i_uid = uid;
+
+	node->nn_flags |= IN_CHANGE;
+	if ((inode->i_mode & (ISUID | ISGID)) &&
+	    (ouid != uid || ogid != gid)) {
+		if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID, 0)) {
+			inode->i_mode &= ~(ISUID | ISGID);
+		}
+	}
+	DPRINTF(VNCALL, ("%s: vp %p, cred %p, td %p - ret OK\n", __func__, vp,
+	    cred, td));
+	return (0);
+}
+
+static int
+nandfs_setattr(struct vop_setattr_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_inode *inode = &node->nn_inode;
+	struct vattr *vap = ap->a_vap;
+	struct ucred *cred = ap->a_cred;
+	struct thread *td = curthread;
+	uint32_t flags;
+	int error = 0;
+
+	if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
+	    (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
+	    (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
+	    (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
+		DPRINTF(VNCALL, ("%s: unsettable attribute\n", __func__));
+		return (EINVAL);
+	}
+
+	if (vap->va_flags != VNOVAL) {
+		DPRINTF(VNCALL, ("%s: vp:%p td:%p flags:%lx\n", __func__, vp,
+		    td, vap->va_flags));
+
+		if (vp->v_mount->mnt_flag & MNT_RDONLY)
+			return (EROFS);
+		/*
+		 * Callers may only modify the file flags on objects they
+		 * have VADMIN rights for.
+		 */
+		if ((error = VOP_ACCESS(vp, VADMIN, cred, td)))
+			return (error);
+		/*
+		 * Unprivileged processes are not permitted to unset system
+		 * flags, or modify flags if any system flags are set.
+		 * Privileged non-jail processes may not modify system flags
+		 * if securelevel > 0 and any existing system flags are set.
+		 * Privileged jail processes behave like privileged non-jail
+		 * processes if the security.jail.chflags_allowed sysctl is
+		 * is non-zero; otherwise, they behave like unprivileged
+		 * processes.
+		 */
+
+		flags = inode->i_flags;
+		if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0)) {
+			if (flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) {
+				error = securelevel_gt(cred, 0);
+				if (error)
+					return (error);
+			}
+			/* Snapshot flag cannot be set or cleared */
+			if (((vap->va_flags & SF_SNAPSHOT) != 0 &&
+			    (flags & SF_SNAPSHOT) == 0) ||
+			    ((vap->va_flags & SF_SNAPSHOT) == 0 &&
+			    (flags & SF_SNAPSHOT) != 0))
+				return (EPERM);
+
+			inode->i_flags = vap->va_flags;
+		} else {
+			if (flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) ||
+			    (vap->va_flags & UF_SETTABLE) != vap->va_flags)
+				return (EPERM);
+
+			flags &= SF_SETTABLE;
+			flags |= (vap->va_flags & UF_SETTABLE);
+			inode->i_flags = flags;
+		}
+		node->nn_flags |= IN_CHANGE;
+		if (vap->va_flags & (IMMUTABLE | APPEND))
+			return (0);
+	}
+	if (inode->i_flags & (IMMUTABLE | APPEND))
+		return (EPERM);
+
+	if (vap->va_size != (u_quad_t)VNOVAL) {
+		DPRINTF(VNCALL, ("%s: vp:%p td:%p size:%jx\n", __func__, vp, td,
+		    (uintmax_t)vap->va_size));
+
+		switch (vp->v_type) {
+		case VDIR:
+			return (EISDIR);
+		case VLNK:
+		case VREG:
+			if (vp->v_mount->mnt_flag & MNT_RDONLY)
+				return (EROFS);
+			if ((inode->i_flags & SF_SNAPSHOT) != 0)
+				return (EPERM);
+			break;
+		default:
+			return (0);
+		}
+
+		if (vap->va_size > node->nn_nandfsdev->nd_maxfilesize)
+			return (EFBIG);
+
+		KASSERT((vp->v_type == VREG), ("Set size %d", vp->v_type));
+		nandfs_truncate(vp, vap->va_size);
+		node->nn_flags |= IN_CHANGE;
+
+		return (0);
+	}
+
+	if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
+		if (vp->v_mount->mnt_flag & MNT_RDONLY)
+			return (EROFS);
+		DPRINTF(VNCALL, ("%s: vp:%p td:%p uid/gid %x/%x\n", __func__,
+		    vp, td, vap->va_uid, vap->va_gid));
+		error = nandfs_chown(vp, vap->va_uid, vap->va_gid, cred, td);
+		if (error)
+			return (error);
+	}
+
+	if (vap->va_mode != (mode_t)VNOVAL) {
+		if (vp->v_mount->mnt_flag & MNT_RDONLY)
+			return (EROFS);
+		DPRINTF(VNCALL, ("%s: vp:%p td:%p mode %x\n", __func__, vp, td,
+		    vap->va_mode));
+
+		error = nandfs_chmod(vp, (int)vap->va_mode, cred, td);
+		if (error)
+			return (error);
+	}
+	if (vap->va_atime.tv_sec != VNOVAL ||
+	    vap->va_mtime.tv_sec != VNOVAL ||
+	    vap->va_birthtime.tv_sec != VNOVAL) {
+		DPRINTF(VNCALL, ("%s: vp:%p td:%p time a/m/b %jx/%jx/%jx\n",
+		    __func__, vp, td, (uintmax_t)vap->va_atime.tv_sec,
+		    (uintmax_t)vap->va_mtime.tv_sec,
+		    (uintmax_t)vap->va_birthtime.tv_sec));
+
+		if (vap->va_atime.tv_sec != VNOVAL)
+			node->nn_flags |= IN_ACCESS;
+		if (vap->va_mtime.tv_sec != VNOVAL)
+			node->nn_flags |= IN_CHANGE | IN_UPDATE;
+		if (vap->va_birthtime.tv_sec != VNOVAL)
+			node->nn_flags |= IN_MODIFIED;
+		nandfs_itimes(vp);
+		return (0);
+	}
+
+	return (0);
+}
+
+static int
+nandfs_open(struct vop_open_args *ap)
+{
+	struct nandfs_node *node = VTON(ap->a_vp);
+	uint64_t filesize;
+
+	DPRINTF(VNCALL, ("nandfs_open called ap->a_mode %x\n", ap->a_mode));
+
+	if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
+		return (EOPNOTSUPP);
+
+	if ((node->nn_inode.i_flags & APPEND) &&
+	    (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
+		return (EPERM);
+
+	filesize = node->nn_inode.i_size;
+	vnode_create_vobject(ap->a_vp, filesize, ap->a_td);
+
+	return (0);
+}
+
+static int
+nandfs_close(struct vop_close_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+
+	DPRINTF(VNCALL, ("%s: vp %p node %p\n", __func__, vp, node));
+
+	mtx_lock(&vp->v_interlock);
+	if (vp->v_usecount > 1)
+		nandfs_itimes_locked(vp);
+	mtx_unlock(&vp->v_interlock);
+
+	return (0);
+}
+
+static int
+nandfs_check_possible(struct vnode *vp, struct vattr *vap, mode_t mode)
+{
+
+	/* Check if we are allowed to write */
+	switch (vap->va_type) {
+	case VDIR:
+	case VLNK:
+	case VREG:
+		/*
+		 * Normal nodes: check if we're on a read-only mounted
+		 * filingsystem and bomb out if we're trying to write.
+		 */
+		if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY))
+			return (EROFS);
+		break;
+	case VBLK:
+	case VCHR:
+	case VSOCK:
+	case VFIFO:
+		/*
+		 * Special nodes: even on read-only mounted filingsystems
+		 * these are allowed to be written to if permissions allow.
+		 */
+		break;
+	default:
+		/* No idea what this is */
+		return (EINVAL);
+	}
+
+	/* Noone may write immutable files */
+	if ((mode & VWRITE) && (VTON(vp)->nn_inode.i_flags & IMMUTABLE))
+		return (EPERM);
+
+	return (0);
+}
+
+static int
+nandfs_check_permitted(struct vnode *vp, struct vattr *vap, mode_t mode,
+    struct ucred *cred)
+{
+
+	return (vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, mode,
+	    cred, NULL));
+}
+
+static int
+nandfs_advlock(struct vop_advlock_args *ap)
+{
+	struct nandfs_node *nvp;
+	quad_t size;
+
+	nvp = VTON(ap->a_vp);
+	size = nvp->nn_inode.i_size;
+	return (lf_advlock(ap, &(nvp->nn_lockf), size));
+}
+
+static int
+nandfs_access(struct vop_access_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	accmode_t accmode = ap->a_accmode;
+	struct ucred *cred = ap->a_cred;
+	struct vattr vap;
+	int error;
+
+	DPRINTF(VNCALL, ("%s: vp:%p mode: %x\n", __func__, vp, accmode));
+
+	error = VOP_GETATTR(vp, &vap, NULL);
+	if (error)
+		return (error);
+
+	error = nandfs_check_possible(vp, &vap, accmode);
+	if (error) {
+		return (error);
+	}
+
+	error = nandfs_check_permitted(vp, &vap, accmode, cred);
+
+	return (error);
+}
+
+static int
+nandfs_print(struct vop_print_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *nvp = VTON(vp);
+
+	printf("\tvp=%p, nandfs_node=%p\n", vp, nvp);
+	printf("nandfs inode %#jx\n", (uintmax_t)nvp->nn_ino);
+	printf("flags = 0x%b\n", (u_int)nvp->nn_flags, PRINT_NODE_FLAGS);
+
+	return (0);
+}
+
+static void
+nandfs_read_filebuf(struct nandfs_node *node, struct buf *bp)
+{
+	struct nandfs_device *nandfsdev = node->nn_nandfsdev;
+	struct buf *nbp;
+	nandfs_daddr_t vblk, pblk;
+	nandfs_lbn_t from;
+	uint32_t blocksize;
+	int error = 0;
+	int blk2dev = nandfsdev->nd_blocksize / DEV_BSIZE;
+
+	/*
+	 * Translate all the block sectors into a series of buffers to read
+	 * asynchronously from the nandfs device. Note that this lookup may
+	 * induce readin's too.
+	 */
+
+	blocksize = nandfsdev->nd_blocksize;
+	if (bp->b_bcount / blocksize != 1)
+		panic("invalid b_count in bp %p\n", bp);
+
+	from = bp->b_blkno;
+
+	DPRINTF(READ, ("\tread in from inode %#jx blkno %#jx"
+	    " count %#lx\n", (uintmax_t)node->nn_ino, from,
+	    bp->b_bcount));
+
+	/* Get virtual block numbers for the vnode's buffer span */
+	error = nandfs_bmap_lookup(node, from, &vblk);
+	if (error) {
+		bp->b_error = EINVAL;
+		bp->b_ioflags |= BIO_ERROR;
+		bufdone(bp);
+		return;
+	}
+
+	/* Translate virtual block numbers to physical block numbers */
+	error = nandfs_vtop(node, vblk, &pblk);
+	if (error) {
+		bp->b_error = EINVAL;
+		bp->b_ioflags |= BIO_ERROR;
+		bufdone(bp);
+		return;
+	}
+
+	/* Issue translated blocks */
+	bp->b_resid = bp->b_bcount;
+
+	/* Note virtual block 0 marks not mapped */
+	if (vblk == 0) {
+		vfs_bio_clrbuf(bp);
+		bufdone(bp);
+		return;
+	}
+
+	nbp = bp;
+	nbp->b_blkno = pblk * blk2dev;
+	bp->b_iooffset = dbtob(nbp->b_blkno);
+	MPASS(bp->b_iooffset >= 0);
+	BO_STRATEGY(&nandfsdev->nd_devvp->v_bufobj, nbp);
+	nandfs_vblk_set(bp, vblk);
+	DPRINTF(READ, ("read_filebuf : ino %#jx blk %#jx -> "
+	    "%#jx -> %#jx [bp %p]\n", (uintmax_t)node->nn_ino,
+	    (uintmax_t)(from), (uintmax_t)vblk,
+	    (uintmax_t)pblk, nbp));
+}
+
+static void
+nandfs_write_filebuf(struct nandfs_node *node, struct buf *bp)
+{
+	struct nandfs_device *nandfsdev = node->nn_nandfsdev;
+
+	bp->b_iooffset = dbtob(bp->b_blkno);
+	MPASS(bp->b_iooffset >= 0);
+	BO_STRATEGY(&nandfsdev->nd_devvp->v_bufobj, bp);
+}
+
+static int
+nandfs_strategy(struct vop_strategy_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct buf *bp = ap->a_bp;
+	struct nandfs_node *node = VTON(vp);
+
+
+	/* check if we ought to be here */
+	KASSERT((vp->v_type != VBLK && vp->v_type != VCHR),
+	    ("nandfs_strategy on type %d", vp->v_type));
+
+	/* Translate if needed and pass on */
+	if (bp->b_iocmd == BIO_READ) {
+		nandfs_read_filebuf(node, bp);
+		return (0);
+	}
+
+	/* Send to segment collector */
+	nandfs_write_filebuf(node, bp);
+	return (0);
+}
+
+static int
+nandfs_readdir(struct vop_readdir_args *ap)
+{
+	struct uio *uio = ap->a_uio;
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_dir_entry *ndirent;
+	struct dirent dirent;
+	struct buf *bp;
+	uint64_t file_size, diroffset, transoffset, blkoff;
+	uint64_t blocknr;
+	uint32_t blocksize = node->nn_nandfsdev->nd_blocksize;
+	uint8_t *pos, name_len;
+	int error;
+
+	DPRINTF(READDIR, ("nandfs_readdir called\n"));
+
+	if (vp->v_type != VDIR)
+		return (ENOTDIR);
+
+	file_size = node->nn_inode.i_size;
+	DPRINTF(READDIR, ("nandfs_readdir filesize %jd resid %zd\n",
+	    (uintmax_t)file_size, uio->uio_resid ));
+
+	/* We are called just as long as we keep on pushing data in */
+	error = 0;
+	if ((uio->uio_offset < file_size) &&
+	    (uio->uio_resid >= sizeof(struct dirent))) {
+		diroffset = uio->uio_offset;
+		transoffset = diroffset;
+
+		blocknr = diroffset / blocksize;
+		blkoff = diroffset % blocksize;
+		error = nandfs_bread(node, blocknr, NOCRED, 0, &bp);
+		if (error) {
+			brelse(bp);
+			return (EIO);
+		}
+		while (diroffset < file_size) {
+			DPRINTF(READDIR, ("readdir : offset = %"PRIu64"\n",
+			    diroffset));
+			if (blkoff >= blocksize) {
+				blkoff = 0; blocknr++;
+				brelse(bp);
+				error = nandfs_bread(node, blocknr, NOCRED, 0,
+				    &bp);
+				if (error) {
+					brelse(bp);
+					return (EIO);
+				}
+			}
+
+			/* Read in one dirent */
+			pos = (uint8_t *)bp->b_data + blkoff;
+			ndirent = (struct nandfs_dir_entry *)pos;
+
+			name_len = ndirent->name_len;
+			memset(&dirent, 0, sizeof(struct dirent));
+			dirent.d_fileno = ndirent->inode;
+			if (dirent.d_fileno) {
+				dirent.d_type = ndirent->file_type;
+				dirent.d_namlen = name_len;
+				strncpy(dirent.d_name, ndirent->name, name_len);
+				dirent.d_reclen = GENERIC_DIRSIZ(&dirent);
+				DPRINTF(READDIR, ("copying `%*.*s`\n", name_len,
+				    name_len, dirent.d_name));
+			}
+
+			/*
+			 * If there isn't enough space in the uio to return a
+			 * whole dirent, break off read
+			 */
+			if (uio->uio_resid < GENERIC_DIRSIZ(&dirent))
+				break;
+
+			/* Transfer */
+			if (dirent.d_fileno)
+				uiomove(&dirent, GENERIC_DIRSIZ(&dirent), uio);
+
+			/* Advance */
+			diroffset += ndirent->rec_len;
+			blkoff += ndirent->rec_len;
+
+			/* Remember the last entry we transfered */
+			transoffset = diroffset;
+		}
+		brelse(bp);
+
+		/* Pass on last transfered offset */
+		uio->uio_offset = transoffset;
+	}
+
+	if (ap->a_eofflag)
+		*ap->a_eofflag = (uio->uio_offset >= file_size);
+
+	return (error);
+}
+
+static int
+nandfs_dirempty(struct vnode *dvp, uint64_t parentino, struct ucred *cred)
+{
+	struct nandfs_node *dnode = VTON(dvp);
+	struct nandfs_dir_entry *dirent;
+	uint64_t file_size = dnode->nn_inode.i_size;
+	uint64_t blockcount = dnode->nn_inode.i_blocks;
+	uint64_t blocknr;
+	uint32_t blocksize = dnode->nn_nandfsdev->nd_blocksize;
+	uint32_t limit;
+	uint32_t off;
+	uint8_t	*pos;
+	struct buf *bp;
+	int error;
+
+	DPRINTF(LOOKUP, ("%s: dvp %p parentino %#jx cred %p\n", __func__, dvp,
+	    (uintmax_t)parentino, cred));
+
+	KASSERT((file_size != 0), ("nandfs_dirempty for NULL dir %p", dvp));
+
+	blocknr = 0;
+	while (blocknr < blockcount) {
+		error = nandfs_bread(dnode, blocknr, NOCRED, 0, &bp);
+		if (error) {
+			brelse(bp);
+			return (0);
+		}
+
+		pos = (uint8_t *)bp->b_data;
+		off = 0;
+
+		if (blocknr == (blockcount - 1))
+			limit = file_size % blocksize;
+		else
+			limit = blocksize;
+
+		while (off < limit) {
+			dirent = (struct nandfs_dir_entry *)(pos + off);
+			off += dirent->rec_len;
+
+			if (dirent->inode == 0)
+				continue;
+
+			switch (dirent->name_len) {
+			case 0:
+				break;
+			case 1:
+				if (dirent->name[0] != '.')
+					goto notempty;
+
+				KASSERT(dirent->inode == dnode->nn_ino,
+				    (".'s inode does not match dir"));
+				break;
+			case 2:
+				if (dirent->name[0] != '.' &&
+				    dirent->name[1] != '.')
+					goto notempty;
+
+				KASSERT(dirent->inode == parentino,
+				    ("..'s inode does not match parent"));
+				break;
+			default:
+				goto notempty;
+			}
+		}
+
+		brelse(bp);
+		blocknr++;
+	}
+
+	return (1);
+notempty:
+	brelse(bp);
+	return (0);
+}
+
+static int
+nandfs_link(struct vop_link_args *ap)
+{
+	struct vnode *tdvp = ap->a_tdvp;
+	struct vnode *vp = ap->a_vp;
+	struct componentname *cnp = ap->a_cnp;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_inode *inode = &node->nn_inode;
+	int error;
+
+	if (tdvp->v_mount != vp->v_mount)
+		return (EXDEV);
+
+	if (inode->i_links_count >= LINK_MAX)
+		return (EMLINK);
+
+	if (inode->i_flags & (IMMUTABLE | APPEND))
+		return (EPERM);
+
+	/* Update link count */
+	inode->i_links_count++;
+
+	/* Add dir entry */
+	error = nandfs_add_dirent(tdvp, node->nn_ino, cnp->cn_nameptr,
+	    cnp->cn_namelen, IFTODT(inode->i_mode));
+	if (error) {
+		inode->i_links_count--;
+	}
+
+	node->nn_flags |= IN_CHANGE;
+	nandfs_itimes(vp);
+	DPRINTF(VNCALL, ("%s: tdvp %p vp %p cnp %p\n",
+	    __func__, tdvp, vp, cnp));
+
+	return (0);
+}
+
+static int
+nandfs_create(struct vop_create_args *ap)
+{
+	struct vnode *dvp = ap->a_dvp;
+	struct vnode **vpp = ap->a_vpp;
+	struct componentname *cnp = ap->a_cnp;
+	uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode);
+	struct nandfs_node *dir_node = VTON(dvp);
+	struct nandfsmount *nmp = dir_node->nn_nmp;
+	struct nandfs_node *node;
+	int error;
+
+	DPRINTF(VNCALL, ("%s: dvp %p\n", __func__, dvp));
+
+	if (nandfs_fs_full(dir_node->nn_nandfsdev))
+		return (ENOSPC);
+
+	/* Create new vnode/inode */
+	error = nandfs_node_create(nmp, &node, mode);
+	if (error)
+		return (error);
+	node->nn_inode.i_gid = dir_node->nn_inode.i_gid;
+	node->nn_inode.i_uid = cnp->cn_cred->cr_uid;
+
+	/* Add new dir entry */
+	error = nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr,
+	    cnp->cn_namelen, IFTODT(mode));
+	if (error) {
+		if (nandfs_node_destroy(node)) {
+			nandfs_error("%s: error destroying node %p\n",
+			    __func__, node);
+		}
+		return (error);
+	}
+	*vpp = NTOV(node);
+
+	DPRINTF(VNCALL, ("created file vp %p nandnode %p ino %jx\n", *vpp, node,
+	    (uintmax_t)node->nn_ino));
+	return (0);
+}
+
+static int
+nandfs_remove(struct vop_remove_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct vnode *dvp = ap->a_dvp;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_node *dnode = VTON(dvp);
+	struct componentname *cnp = ap->a_cnp;
+
+	DPRINTF(VNCALL, ("%s: dvp %p vp %p nandnode %p ino %#jx link %d\n",
+	    __func__, dvp, vp, node, (uintmax_t)node->nn_ino,
+	    node->nn_inode.i_links_count));
+
+	if (vp->v_type == VDIR)
+		return (EISDIR);
+
+	/* Files marked as immutable or append-only cannot be deleted. */
+	if ((node->nn_inode.i_flags & (IMMUTABLE | APPEND | NOUNLINK)) ||
+	    (dnode->nn_inode.i_flags & APPEND))
+		return (EPERM);
+
+	nandfs_remove_dirent(dvp, node, cnp);
+	node->nn_inode.i_links_count--;
+	node->nn_flags |= IN_CHANGE;
+
+	return (0);
+}
+
+/*
+ * Check if source directory is in the path of the target directory.
+ * Target is supplied locked, source is unlocked.
+ * The target is always vput before returning.
+ */
+static int
+nandfs_checkpath(struct nandfs_node *src, struct nandfs_node *dest,
+    struct ucred *cred)
+{
+	struct vnode *vp;
+	int error, rootino;
+	struct nandfs_dir_entry dirent;
+
+	vp = NTOV(dest);
+	if (src->nn_ino == dest->nn_ino) {
+		error = EEXIST;
+		goto out;
+	}
+	rootino = NANDFS_ROOT_INO;
+	error = 0;
+	if (dest->nn_ino == rootino)
+		goto out;
+
+	for (;;) {
+		if (vp->v_type != VDIR) {
+			error = ENOTDIR;
+			break;
+		}
+
+		error = vn_rdwr(UIO_READ, vp, (caddr_t)&dirent,
+		    NANDFS_DIR_REC_LEN(2), (off_t)0, UIO_SYSSPACE,
+		    IO_NODELOCKED | IO_NOMACCHECK, cred, NOCRED,
+		    NULL, NULL);
+		if (error != 0)
+			break;
+		if (dirent.name_len != 2 ||
+		    dirent.name[0] != '.' ||
+		    dirent.name[1] != '.') {
+			error = ENOTDIR;
+			break;
+		}
+		if (dirent.inode == src->nn_ino) {
+			error = EINVAL;
+			break;
+		}
+		if (dirent.inode == rootino)
+			break;
+		vput(vp);
+		if ((error = VFS_VGET(vp->v_mount, dirent.inode,
+		    LK_EXCLUSIVE, &vp)) != 0) {
+			vp = NULL;
+			break;
+		}
+	}
+
+out:
+	if (error == ENOTDIR)
+		printf("checkpath: .. not a directory\n");
+	if (vp != NULL)
+		vput(vp);
+	return (error);
+}
+
+static int
+nandfs_rename(struct vop_rename_args *ap)
+{
+	struct vnode *tvp = ap->a_tvp;
+	struct vnode *tdvp = ap->a_tdvp;
+	struct vnode *fvp = ap->a_fvp;
+	struct vnode *fdvp = ap->a_fdvp;
+	struct componentname *tcnp = ap->a_tcnp;
+	struct componentname *fcnp = ap->a_fcnp;
+	int doingdirectory = 0, oldparent = 0, newparent = 0;
+	int error = 0;
+
+	struct nandfs_node *fdnode, *fnode, *fnode1;
+	struct nandfs_node *tdnode = VTON(tdvp);
+	struct nandfs_node *tnode;
+
+	uint32_t tdflags, fflags, fdflags;
+	uint16_t mode;
+
+	DPRINTF(VNCALL, ("%s: fdvp:%p fvp:%p tdvp:%p tdp:%p\n", __func__, fdvp,
+	    fvp, tdvp, tvp));
+
+	/*
+	 * Check for cross-device rename.
+	 */
+	if ((fvp->v_mount != tdvp->v_mount) ||
+	    (tvp && (fvp->v_mount != tvp->v_mount))) {
+		error = EXDEV;
+abortit:
+		if (tdvp == tvp)
+			vrele(tdvp);
+		else
+			vput(tdvp);
+		if (tvp)
+			vput(tvp);
+		vrele(fdvp);
+		vrele(fvp);
+		return (error);
+	}
+
+	tdflags = tdnode->nn_inode.i_flags;
+	if (tvp &&
+	    ((VTON(tvp)->nn_inode.i_flags & (NOUNLINK | IMMUTABLE | APPEND)) ||
+	    (tdflags & APPEND))) {
+		error = EPERM;
+		goto abortit;
+	}
+
+	/*
+	 * Renaming a file to itself has no effect.  The upper layers should
+	 * not call us in that case.  Temporarily just warn if they do.
+	 */
+	if (fvp == tvp) {
+		printf("nandfs_rename: fvp == tvp (can't happen)\n");
+		error = 0;
+		goto abortit;
+	}
+
+	if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
+		goto abortit;
+
+	fdnode = VTON(fdvp);
+	fnode = VTON(fvp);
+
+	if (fnode->nn_inode.i_links_count >= LINK_MAX) {
+		VOP_UNLOCK(fvp, 0);
+		error = EMLINK;
+		goto abortit;
+	}
+
+	fflags = fnode->nn_inode.i_flags;
+	fdflags = fdnode->nn_inode.i_flags;
+
+	if ((fflags & (NOUNLINK | IMMUTABLE | APPEND)) ||
+	    (fdflags & APPEND)) {
+		VOP_UNLOCK(fvp, 0);
+		error = EPERM;
+		goto abortit;
+	}
+
+	mode = fnode->nn_inode.i_mode;
+	if ((mode & S_IFMT) == S_IFDIR) {
+		/*
+		 * Avoid ".", "..", and aliases of "." for obvious reasons.
+		 */
+
+		if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
+		    (fdvp == fvp) ||
+		    ((fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) ||
+		    (fnode->nn_flags & IN_RENAME)) {
+			VOP_UNLOCK(fvp, 0);
+			error = EINVAL;
+			goto abortit;
+		}
+		fnode->nn_flags |= IN_RENAME;
+		doingdirectory = 1;
+		DPRINTF(VNCALL, ("%s: doingdirectory dvp %p\n", __func__,
+		    tdvp));
+		oldparent = fdnode->nn_ino;
+	}
+
+	vrele(fdvp);
+
+	tnode = NULL;
+	if (tvp)
+		tnode = VTON(tvp);
+
+	/*
+	 * Bump link count on fvp while we are moving stuff around. If we
+	 * crash before completing the work, the link count may be wrong
+	 * but correctable.
+	 */
+	fnode->nn_inode.i_links_count++;
+
+	/* Check for in path moving XXX */
+	error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
+	VOP_UNLOCK(fvp, 0);
+	if (oldparent != tdnode->nn_ino)
+		newparent = tdnode->nn_ino;
+	if (doingdirectory && newparent) {
+		if (error)	/* write access check above */
+			goto bad;
+		if (tnode != NULL)
+			vput(tvp);
+
+		error = nandfs_checkpath(fnode, tdnode, tcnp->cn_cred);
+		if (error)
+			goto out;
+
+		VREF(tdvp);
+		error = relookup(tdvp, &tvp, tcnp);
+		if (error)
+			goto out;
+		vrele(tdvp);
+		tdnode = VTON(tdvp);
+		tnode = NULL;
+		if (tvp)
+			tnode = VTON(tvp);
+	}
+
+	/*
+	 * If the target doesn't exist, link the target to the source and
+	 * unlink the source. Otherwise, rewrite the target directory to
+	 * reference the source and remove the original entry.
+	 */
+
+	if (tvp == NULL) {
+		/*
+		 * Account for ".." in new directory.
+		 */
+		if (doingdirectory && fdvp != tdvp)
+			tdnode->nn_inode.i_links_count++;
+
+		DPRINTF(VNCALL, ("%s: new entry in dvp:%p\n", __func__, tdvp));
+		/*
+		 * Add name in new directory.
+		 */
+		error = nandfs_add_dirent(tdvp, fnode->nn_ino, tcnp->cn_nameptr,
+		    tcnp->cn_namelen, IFTODT(fnode->nn_inode.i_mode));
+		if (error) {
+			if (doingdirectory && fdvp != tdvp)
+				tdnode->nn_inode.i_links_count--;
+			goto bad;
+		}
+
+		vput(tdvp);
+	} else {
+		/*
+		 * If the parent directory is "sticky", then the user must
+		 * own the parent directory, or the destination of the rename,
+		 * otherwise the destination may not be changed (except by
+		 * root). This implements append-only directories.
+		 */
+		if ((tdnode->nn_inode.i_mode & S_ISTXT) &&
+		    tcnp->cn_cred->cr_uid != 0 &&
+		    tcnp->cn_cred->cr_uid != tdnode->nn_inode.i_uid &&
+		    tnode->nn_inode.i_uid != tcnp->cn_cred->cr_uid) {
+			error = EPERM;
+			goto bad;
+		}
+		/*
+		 * Target must be empty if a directory and have no links
+		 * to it. Also, ensure source and target are compatible
+		 * (both directories, or both not directories).
+		 */
+		mode = tnode->nn_inode.i_mode;
+		if ((mode & S_IFMT) == S_IFDIR) {
+			if (!nandfs_dirempty(tvp, tdnode->nn_ino,
+			    tcnp->cn_cred)) {
+				error = ENOTEMPTY;
+				goto bad;
+			}
+			if (!doingdirectory) {
+				error = ENOTDIR;
+				goto bad;
+			}
+			/*
+			 * Update name cache since directory is going away.
+			 */
+			cache_purge(tdvp);
+		} else if (doingdirectory) {
+			error = EISDIR;
+			goto bad;
+		}
+
+		DPRINTF(VNCALL, ("%s: update entry dvp:%p\n", __func__, tdvp));
+		/*
+		 * Change name tcnp in tdvp to point at fvp.
+		 */
+		error = nandfs_update_dirent(tdvp, fnode, tnode);
+		if (error)
+			goto bad;
+
+		if (doingdirectory && !newparent)
+			tdnode->nn_inode.i_links_count--;
+
+		vput(tdvp);
+
+		tnode->nn_inode.i_links_count--;
+		vput(tvp);
+		tnode = NULL;
+	}
+
+	/*
+	 * Unlink the source.
+	 */
+	fcnp->cn_flags &= ~MODMASK;
+	fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
+	VREF(fdvp);
+	error = relookup(fdvp, &fvp, fcnp);
+	if (error == 0)
+		vrele(fdvp);
+	if (fvp != NULL) {
+		fnode1 = VTON(fvp);
+		fdnode = VTON(fdvp);
+	} else {
+		/*
+		 * From name has disappeared.
+		 */
+		if (doingdirectory)
+			panic("nandfs_rename: lost dir entry");
+		vrele(ap->a_fvp);
+		return (0);
+	}
+
+	DPRINTF(VNCALL, ("%s: unlink source fnode:%p\n", __func__, fnode));
+
+	/*
+	 * Ensure that the directory entry still exists and has not
+	 * changed while the new name has been entered. If the source is
+	 * a file then the entry may have been unlinked or renamed. In
+	 * either case there is no further work to be done. If the source
+	 * is a directory then it cannot have been rmdir'ed; its link
+	 * count of three would cause a rmdir to fail with ENOTEMPTY.
+	 * The IN_RENAME flag ensures that it cannot be moved by another
+	 * rename.
+	 */
+	if (fnode != fnode1) {
+		if (doingdirectory)
+			panic("nandfs: lost dir entry");
+	} else {
+		/*
+		 * If the source is a directory with a
+		 * new parent, the link count of the old
+		 * parent directory must be decremented
+		 * and ".." set to point to the new parent.
+		 */
+		if (doingdirectory && newparent) {
+			DPRINTF(VNCALL, ("%s: new parent %#jx -> %#jx\n",
+			    __func__, (uintmax_t) oldparent,
+			    (uintmax_t) newparent));
+			error = nandfs_update_parent_dir(fvp, newparent);
+			if (!error) {
+				fdnode->nn_inode.i_links_count--;
+				fdnode->nn_flags |= IN_CHANGE;
+			}
+		}
+		error = nandfs_remove_dirent(fdvp, fnode, fcnp);
+		if (!error) {
+			fnode->nn_inode.i_links_count--;
+			fnode->nn_flags |= IN_CHANGE;
+		}
+		fnode->nn_flags &= ~IN_RENAME;
+	}
+	if (fdnode)
+		vput(fdvp);
+	if (fnode)
+		vput(fvp);
+	vrele(ap->a_fvp);
+	return (error);
+
+bad:
+	DPRINTF(VNCALL, ("%s: error:%d\n", __func__, error));
+	if (tnode)
+		vput(NTOV(tnode));
+	vput(NTOV(tdnode));
+out:
+	if (doingdirectory)
+		fnode->nn_flags &= ~IN_RENAME;
+	if (vn_lock(fvp, LK_EXCLUSIVE) == 0) {
+		fnode->nn_inode.i_links_count--;
+		fnode->nn_flags |= IN_CHANGE;
+		fnode->nn_flags &= ~IN_RENAME;
+		vput(fvp);
+	} else
+		vrele(fvp);
+	return (error);
+}
+
+static int
+nandfs_mkdir(struct vop_mkdir_args *ap)
+{
+	struct vnode *dvp = ap->a_dvp;
+	struct vnode **vpp = ap->a_vpp;
+	struct componentname *cnp = ap->a_cnp;
+	struct nandfs_node *dir_node = VTON(dvp);
+	struct nandfs_inode *dir_inode = &dir_node->nn_inode;
+	struct nandfs_node *node;
+	struct nandfsmount *nmp = dir_node->nn_nmp;
+	uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode);
+	int error;
+
+	DPRINTF(VNCALL, ("%s: dvp %p\n", __func__, dvp));
+
+	if (nandfs_fs_full(dir_node->nn_nandfsdev))
+		return (ENOSPC);
+
+	if (dir_inode->i_links_count >= LINK_MAX)
+		return (EMLINK);
+
+	error = nandfs_node_create(nmp, &node, mode);
+	if (error)
+		return (error);
+
+	node->nn_inode.i_gid = dir_node->nn_inode.i_gid;
+	node->nn_inode.i_uid = cnp->cn_cred->cr_uid;
+
+	*vpp = NTOV(node);
+
+	error = nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr,
+	    cnp->cn_namelen, IFTODT(mode));
+	if (error) {
+		vput(*vpp);
+		return (error);
+	}
+
+	dir_node->nn_inode.i_links_count++;
+	dir_node->nn_flags |= IN_CHANGE;
+
+	error = nandfs_init_dir(NTOV(node), node->nn_ino, dir_node->nn_ino);
+	if (error) {
+		vput(NTOV(node));
+		return (error);
+	}
+
+	DPRINTF(VNCALL, ("created dir vp %p nandnode %p ino %jx\n", *vpp, node,
+	    (uintmax_t)node->nn_ino));
+	return (0);
+}
+
+static int
+nandfs_mknod(struct vop_mknod_args *ap)
+{
+	struct vnode *dvp = ap->a_dvp;
+	struct vnode **vpp = ap->a_vpp;
+	struct vattr *vap = ap->a_vap;
+	uint16_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
+	struct componentname *cnp = ap->a_cnp;
+	struct nandfs_node *dir_node = VTON(dvp);
+	struct nandfsmount *nmp = dir_node->nn_nmp;
+	struct nandfs_node *node;
+	int error;
+
+	if (nandfs_fs_full(dir_node->nn_nandfsdev))
+		return (ENOSPC);
+
+	error = nandfs_node_create(nmp, &node, mode);
+	if (error)
+		return (error);
+	node->nn_inode.i_gid = dir_node->nn_inode.i_gid;
+	node->nn_inode.i_uid = cnp->cn_cred->cr_uid;
+	if (vap->va_rdev != VNOVAL)
+		node->nn_inode.i_special = vap->va_rdev;
+
+	*vpp = NTOV(node);
+
+	if (nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr,
+	    cnp->cn_namelen, IFTODT(mode))) {
+		vput(*vpp);
+		return (ENOTDIR);
+	}
+
+	node->nn_flags |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
+
+	return (0);
+}
+
+static int
+nandfs_symlink(struct vop_symlink_args *ap)
+{
+	struct vnode **vpp = ap->a_vpp;
+	struct vnode *dvp = ap->a_dvp;
+	uint16_t mode = MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode);
+	struct componentname *cnp = ap->a_cnp;
+	struct nandfs_node *dir_node = VTON(dvp);
+	struct nandfsmount *nmp = dir_node->nn_nmp;
+	struct nandfs_node *node;
+	int len, error;
+
+	if (nandfs_fs_full(dir_node->nn_nandfsdev))
+		return (ENOSPC);
+
+	error = nandfs_node_create(nmp, &node, S_IFLNK | mode);
+	if (error)
+		return (error);
+	node->nn_inode.i_gid = dir_node->nn_inode.i_gid;
+	node->nn_inode.i_uid = cnp->cn_cred->cr_uid;
+
+	*vpp = NTOV(node);
+
+	if (nandfs_add_dirent(dvp, node->nn_ino, cnp->cn_nameptr,
+	    cnp->cn_namelen, IFTODT(mode))) {
+		vput(*vpp);
+		return (ENOTDIR);
+	}
+
+
+	len = strlen(ap->a_target);
+	error = vn_rdwr(UIO_WRITE, *vpp, ap->a_target, len, (off_t)0,
+	    UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK,
+	    cnp->cn_cred, NOCRED, NULL, NULL);
+	if (error)
+		vput(*vpp);
+
+	return (error);
+}
+
+static int
+nandfs_readlink(struct vop_readlink_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+
+	return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
+}
+
+static int
+nandfs_rmdir(struct vop_rmdir_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct vnode *dvp = ap->a_dvp;
+	struct componentname *cnp = ap->a_cnp;
+	struct nandfs_node *node, *dnode;
+	uint32_t dflag, flag;
+	int error = 0;
+
+	node = VTON(vp);
+	dnode = VTON(dvp);
+
+	/* Files marked as immutable or append-only cannot be deleted. */
+	if ((node->nn_inode.i_flags & (IMMUTABLE | APPEND | NOUNLINK)) ||
+	    (dnode->nn_inode.i_flags & APPEND))
+		return (EPERM);
+
+	DPRINTF(VNCALL, ("%s: dvp %p vp %p nandnode %p ino %#jx\n", __func__,
+	    dvp, vp, node, (uintmax_t)node->nn_ino));
+
+	if (node->nn_inode.i_links_count < 2)
+		return (EINVAL);
+
+	if (!nandfs_dirempty(vp, dnode->nn_ino, cnp->cn_cred))
+		return (ENOTEMPTY);
+
+	/* Files marked as immutable or append-only cannot be deleted. */
+	dflag = dnode->nn_inode.i_flags;
+	flag = node->nn_inode.i_flags;
+	if ((dflag & APPEND) ||
+	    (flag & (NOUNLINK | IMMUTABLE | APPEND))) {
+		return (EPERM);
+	}
+
+	if (vp->v_mountedhere != 0)
+		return (EINVAL);
+
+	nandfs_remove_dirent(dvp, node, cnp);
+	dnode->nn_inode.i_links_count -= 1;
+	dnode->nn_flags |= IN_CHANGE;
+
+	cache_purge(dvp);
+
+	error = nandfs_truncate(vp, (uint64_t)0);
+	if (error)
+		return (error);
+
+	node->nn_inode.i_links_count -= 2;
+	node->nn_flags |= IN_CHANGE;
+
+	cache_purge(vp);
+
+	return (error);
+}
+
+static int
+nandfs_fsync(struct vop_fsync_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	int locked;
+
+	DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx\n", __func__, vp,
+	    node, (uintmax_t)node->nn_ino));
+
+	/*
+	 * Start syncing vnode only if inode was modified or
+	 * there are some dirty buffers
+	 */
+	if (VTON(vp)->nn_flags & IN_MODIFIED ||
+	    vp->v_bufobj.bo_dirty.bv_cnt) {
+		locked = VOP_ISLOCKED(vp);
+		VOP_UNLOCK(vp, 0);
+		nandfs_wakeup_wait_sync(node->nn_nandfsdev, SYNCER_FSYNC);
+		VOP_LOCK(vp, locked | LK_RETRY);
+	}
+
+	return (0);
+}
+
+static int
+nandfs_bmap(struct vop_bmap_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *nnode = VTON(vp);
+	struct nandfs_device *nandfsdev = nnode->nn_nandfsdev;
+	nandfs_daddr_t l2vmap, v2pmap;
+	int error;
+	int blk2dev = nandfsdev->nd_blocksize / DEV_BSIZE;
+
+	DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx\n", __func__, vp,
+	    nnode, (uintmax_t)nnode->nn_ino));
+
+	if (ap->a_bop != NULL)
+		*ap->a_bop = &nandfsdev->nd_devvp->v_bufobj;
+	if (ap->a_bnp == NULL)
+		return (0);
+	if (ap->a_runp != NULL)
+		*ap->a_runp = 0;
+	if (ap->a_runb != NULL)
+		*ap->a_runb = 0;
+
+	/*
+	 * Translate all the block sectors into a series of buffers to read
+	 * asynchronously from the nandfs device. Note that this lookup may
+	 * induce readin's too.
+	 */
+
+	/* Get virtual block numbers for the vnode's buffer span */
+	error = nandfs_bmap_lookup(nnode, ap->a_bn, &l2vmap);
+	if (error)
+		return (-1);
+
+	/* Translate virtual block numbers to physical block numbers */
+	error = nandfs_vtop(nnode, l2vmap, &v2pmap);
+	if (error)
+		return (-1);
+
+	/* Note virtual block 0 marks not mapped */
+	if (l2vmap == 0)
+		*ap->a_bnp = -1;
+	else
+		*ap->a_bnp = v2pmap * blk2dev;	/* in DEV_BSIZE */
+
+	DPRINTF(VNCALL, ("%s: vp %p nandnode %p ino %#jx lblk %jx -> blk %jx\n",
+	    __func__, vp, nnode, (uintmax_t)nnode->nn_ino, (uintmax_t)ap->a_bn,
+	    (uintmax_t)*ap->a_bnp ));
+
+	return (0);
+}
+
+static void
+nandfs_force_syncer(struct nandfsmount *nmp)
+{
+
+	nmp->nm_flags |= NANDFS_FORCE_SYNCER;
+	nandfs_wakeup_wait_sync(nmp->nm_nandfsdev, SYNCER_FFORCE);
+}
+
+static int
+nandfs_ioctl(struct vop_ioctl_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	u_long command = ap->a_command;
+	caddr_t data = ap->a_data;
+	struct nandfs_node *node = VTON(vp);
+	struct nandfs_device *nandfsdev = node->nn_nandfsdev;
+	struct nandfsmount *nmp = node->nn_nmp;
+	uint64_t *tab, *cno;
+	struct nandfs_seg_stat *nss;
+	struct nandfs_cpmode *ncpm;
+	struct nandfs_argv *nargv;
+	struct nandfs_cpstat *ncp;
+	int error;
+
+	DPRINTF(VNCALL, ("%s: %x\n", __func__, (uint32_t)command));
+
+	error = priv_check(ap->a_td, PRIV_VFS_MOUNT);
+	if (error)
+		return (error);
+
+	if (nmp->nm_ronly) {
+		switch (command) {
+		case NANDFS_IOCTL_GET_FSINFO:
+		case NANDFS_IOCTL_GET_SUSTAT:
+		case NANDFS_IOCTL_GET_CPINFO:
+		case NANDFS_IOCTL_GET_CPSTAT:
+		case NANDFS_IOCTL_GET_SUINFO:
+		case NANDFS_IOCTL_GET_VINFO:
+		case NANDFS_IOCTL_GET_BDESCS:
+			break;
+		default:
+			return (EROFS);
+		}
+	}
+
+	switch (command) {
+	case NANDFS_IOCTL_GET_FSINFO:
+		error = nandfs_get_fsinfo(nmp, (struct nandfs_fsinfo *)data);
+		break;
+	case NANDFS_IOCTL_GET_SUSTAT:
+		nss = (struct nandfs_seg_stat *)data;
+		error = nandfs_get_seg_stat(nandfsdev, nss);
+		break;
+	case NANDFS_IOCTL_CHANGE_CPMODE:
+		ncpm = (struct nandfs_cpmode *)data;
+		error = nandfs_chng_cpmode(nandfsdev->nd_cp_node, ncpm);
+		nandfs_force_syncer(nmp);
+		break;
+	case NANDFS_IOCTL_GET_CPINFO:
+		nargv = (struct nandfs_argv *)data;
+		error = nandfs_get_cpinfo_ioctl(nandfsdev->nd_cp_node, nargv);
+		break;
+	case NANDFS_IOCTL_DELETE_CP:
+		tab = (uint64_t *)data;
+		error = nandfs_delete_cp(nandfsdev->nd_cp_node, tab[0], tab[1]);
+		nandfs_force_syncer(nmp);
+		break;
+	case NANDFS_IOCTL_GET_CPSTAT:
+		ncp = (struct nandfs_cpstat *)data;
+		error = nandfs_get_cpstat(nandfsdev->nd_cp_node, ncp);
+		break;
+	case NANDFS_IOCTL_GET_SUINFO:
+		nargv = (struct nandfs_argv *)data;
+		error = nandfs_get_segment_info_ioctl(nandfsdev, nargv);
+		break;
+	case NANDFS_IOCTL_GET_VINFO:
+		nargv = (struct nandfs_argv *)data;
+		error = nandfs_get_dat_vinfo_ioctl(nandfsdev, nargv);
+		break;
+	case NANDFS_IOCTL_GET_BDESCS:
+		nargv = (struct nandfs_argv *)data;
+		error = nandfs_get_dat_bdescs_ioctl(nandfsdev, nargv);
+		break;
+	case NANDFS_IOCTL_SYNC:
+		cno = (uint64_t *)data;
+		nandfs_force_syncer(nmp);
+		*cno = nandfsdev->nd_last_cno;
+		error = 0;
+		break;
+	case NANDFS_IOCTL_MAKE_SNAP:
+		cno = (uint64_t *)data;
+		error = nandfs_make_snap(nandfsdev, cno);
+		nandfs_force_syncer(nmp);
+		break;
+	case NANDFS_IOCTL_DELETE_SNAP:
+		cno = (uint64_t *)data;
+		error = nandfs_delete_snap(nandfsdev, *cno);
+		nandfs_force_syncer(nmp);
+		break;
+	default:
+		error = ENOTTY;
+		break;
+	}
+
+	return (error);
+}
+
+/*
+ * Whiteout vnode call
+ */
+static int
+nandfs_whiteout(struct vop_whiteout_args *ap)
+{
+	struct vnode *dvp = ap->a_dvp;
+	struct componentname *cnp = ap->a_cnp;
+	int error = 0;
+
+	switch (ap->a_flags) {
+	case LOOKUP:
+		return (0);
+	case CREATE:
+		/* Create a new directory whiteout */
+#ifdef INVARIANTS
+		if ((cnp->cn_flags & SAVENAME) == 0)
+			panic("ufs_whiteout: missing name");
+#endif
+		error = nandfs_add_dirent(dvp, NANDFS_WHT_INO, cnp->cn_nameptr,
+		    cnp->cn_namelen, DT_WHT);
+		break;
+
+	case DELETE:
+		/* Remove an existing directory whiteout */
+		cnp->cn_flags &= ~DOWHITEOUT;
+		error = nandfs_remove_dirent(dvp, NULL, cnp);
+		break;
+	default:
+		panic("nandf_whiteout: unknown op: %d", ap->a_flags);
+	}
+
+	return (error);
+}
+
+static int
+nandfs_pathconf(struct vop_pathconf_args *ap)
+{
+	int error;
+
+	error = 0;
+	switch (ap->a_name) {
+	case _PC_LINK_MAX:
+		*ap->a_retval = LINK_MAX;
+		break;
+	case _PC_NAME_MAX:
+		*ap->a_retval = NAME_MAX;
+		break;
+	case _PC_PATH_MAX:
+		*ap->a_retval = PATH_MAX;
+		break;
+	case _PC_PIPE_BUF:
+		*ap->a_retval = PIPE_BUF;
+		break;
+	case _PC_CHOWN_RESTRICTED:
+		*ap->a_retval = 1;
+		break;
+	case _PC_NO_TRUNC:
+		*ap->a_retval = 1;
+		break;
+	case _PC_ACL_EXTENDED:
+		*ap->a_retval = 0;
+		break;
+	case _PC_ALLOC_SIZE_MIN:
+		*ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize;
+		break;
+	case _PC_FILESIZEBITS:
+		*ap->a_retval = 64;
+		break;
+	case _PC_REC_INCR_XFER_SIZE:
+		*ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
+		break;
+	case _PC_REC_MAX_XFER_SIZE:
+		*ap->a_retval = -1; /* means ``unlimited'' */
+		break;
+	case _PC_REC_MIN_XFER_SIZE:
+		*ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize;
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+	return (error);
+}
+
+static int
+nandfs_vnlock1(struct vop_lock1_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	int error, vi_locked;
+
+	/*
+	 * XXX can vnode go away while we are sleeping?
+	 */
+	vi_locked = mtx_owned(&vp->v_interlock);
+	if (vi_locked)
+		VI_UNLOCK(vp);
+	error = NANDFS_WRITELOCKFLAGS(node->nn_nandfsdev,
+	    ap->a_flags & LK_NOWAIT);
+	if (vi_locked && !error)
+		VI_LOCK(vp);
+	if (error)
+		return (error);
+
+	error = vop_stdlock(ap);
+	if (error) {
+		NANDFS_WRITEUNLOCK(node->nn_nandfsdev);
+		return (error);
+	}
+
+	return (0);
+}
+
+static int
+nandfs_vnunlock(struct vop_unlock_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+	int error;
+
+	error = vop_stdunlock(ap);
+	if (error)
+		return (error);
+
+	NANDFS_WRITEUNLOCK(node->nn_nandfsdev);
+
+	return (0);
+}
+
+/*
+ * Global vfs data structures
+ */
+struct vop_vector nandfs_vnodeops = {
+	.vop_default =		&default_vnodeops,
+	.vop_access =		nandfs_access,
+	.vop_advlock =		nandfs_advlock,
+	.vop_bmap =		nandfs_bmap,
+	.vop_close =		nandfs_close,
+	.vop_create =		nandfs_create,
+	.vop_fsync =		nandfs_fsync,
+	.vop_getattr =		nandfs_getattr,
+	.vop_inactive =		nandfs_inactive,
+	.vop_cachedlookup =	nandfs_lookup,
+	.vop_ioctl =		nandfs_ioctl,
+	.vop_link =		nandfs_link,
+	.vop_lookup =		vfs_cache_lookup,
+	.vop_mkdir =		nandfs_mkdir,
+	.vop_mknod =		nandfs_mknod,
+	.vop_open =		nandfs_open,
+	.vop_pathconf =		nandfs_pathconf,
+	.vop_print =		nandfs_print,
+	.vop_read =		nandfs_read,
+	.vop_readdir =		nandfs_readdir,
+	.vop_readlink =		nandfs_readlink,
+	.vop_reclaim =		nandfs_reclaim,
+	.vop_remove =		nandfs_remove,
+	.vop_rename =		nandfs_rename,
+	.vop_rmdir =		nandfs_rmdir,
+	.vop_whiteout =		nandfs_whiteout,
+	.vop_write =		nandfs_write,
+	.vop_setattr =		nandfs_setattr,
+	.vop_strategy =		nandfs_strategy,
+	.vop_symlink =		nandfs_symlink,
+	.vop_lock1 =		nandfs_vnlock1,
+	.vop_unlock =		nandfs_vnunlock,
+};
+
+struct vop_vector nandfs_system_vnodeops = {
+	.vop_default =		&default_vnodeops,
+	.vop_close =		nandfs_close,
+	.vop_inactive =		nandfs_inactive,
+	.vop_reclaim =		nandfs_reclaim,
+	.vop_strategy =		nandfs_strategy,
+	.vop_fsync =		nandfs_fsync,
+	.vop_bmap =		nandfs_bmap,
+	.vop_access =		VOP_PANIC,
+	.vop_advlock =		VOP_PANIC,
+	.vop_create =		VOP_PANIC,
+	.vop_getattr =		VOP_PANIC,
+	.vop_cachedlookup =	VOP_PANIC,
+	.vop_ioctl =		VOP_PANIC,
+	.vop_link =		VOP_PANIC,
+	.vop_lookup =		VOP_PANIC,
+	.vop_mkdir =		VOP_PANIC,
+	.vop_mknod =		VOP_PANIC,
+	.vop_open =		VOP_PANIC,
+	.vop_pathconf =		VOP_PANIC,
+	.vop_print =		VOP_PANIC,
+	.vop_read =		VOP_PANIC,
+	.vop_readdir =		VOP_PANIC,
+	.vop_readlink =		VOP_PANIC,
+	.vop_remove =		VOP_PANIC,
+	.vop_rename =		VOP_PANIC,
+	.vop_rmdir =		VOP_PANIC,
+	.vop_whiteout =		VOP_PANIC,
+	.vop_write =		VOP_PANIC,
+	.vop_setattr =		VOP_PANIC,
+	.vop_symlink =		VOP_PANIC,
+};
+
+static int
+nandfsfifo_close(struct vop_close_args *ap)
+{
+	struct vnode *vp = ap->a_vp;
+	struct nandfs_node *node = VTON(vp);
+
+	DPRINTF(VNCALL, ("%s: vp %p node %p\n", __func__, vp, node));
+
+	mtx_lock(&vp->v_interlock);
+	if (vp->v_usecount > 1)
+		nandfs_itimes_locked(vp);
+	mtx_unlock(&vp->v_interlock);
+
+	return (fifo_specops.vop_close(ap));
+}
+
+struct vop_vector nandfs_fifoops = {
+	.vop_default =		&fifo_specops,
+	.vop_fsync =		VOP_PANIC,
+	.vop_access =		nandfs_access,
+	.vop_close =		nandfsfifo_close,
+	.vop_getattr =		nandfs_getattr,
+	.vop_inactive =		nandfs_inactive,
+	.vop_print =		nandfs_print,
+	.vop_read =		VOP_PANIC,
+	.vop_reclaim =		nandfs_reclaim,
+	.vop_setattr =		nandfs_setattr,
+	.vop_write =		VOP_PANIC,
+	.vop_lock1 =		nandfs_vnlock1,
+	.vop_unlock =		nandfs_vnunlock,
+};
+
+int
+nandfs_vinit(struct vnode *vp, uint64_t ino)
+{
+	struct nandfs_node *node;
+
+	ASSERT_VOP_LOCKED(vp, __func__);
+
+	node = VTON(vp);
+
+	/* Check if we're fetching the root */
+	if (ino == NANDFS_ROOT_INO)
+		vp->v_vflag |= VV_ROOT;
+
+	if (ino != NANDFS_GC_INO)
+		vp->v_type = IFTOVT(node->nn_inode.i_mode);
+	else
+		vp->v_type = VREG;
+
+	if (vp->v_type == VFIFO)
+		vp->v_op = &nandfs_fifoops;
+
+	return (0);
+}