示例#1
0
int
nandfs_node_update(struct nandfs_node *node)
{
	struct nandfs_alloc_request req;
	struct nandfsmount *nmp;
	struct nandfs_mdt *mdt;
	struct nandfs_node *ifile;
	struct nandfs_inode *inode;
	uint32_t index;
	int error = 0;

	nmp = node->nn_nmp;
	ifile = nmp->nm_ifile_node;
	ASSERT_VOP_LOCKED(NTOV(ifile), __func__);

	req.entrynum = node->nn_ino;
	mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;

	DPRINTF(IFILE, ("%s: node:%p ino:%#jx\n",
	    __func__, &node->nn_inode, (uintmax_t)node->nn_ino));

	error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
	if (error) {
		printf("nandfs_get_entry_block returned with ERROR=%d\n",
		    error);
		return (error);
	}

	inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
	memcpy(inode, &node->nn_inode, sizeof(*inode));
	error = nandfs_dirty_buf(req.bp_entry, 0);

	return (error);
}
示例#2
0
static int
nandfs_bad_segment(struct nandfs_device *fsdev, uint64_t seg)
{
	struct nandfs_node *su_node;
	struct nandfs_segment_usage *su_usage;
	struct buf *bp;
	uint64_t blk, offset;
	int error;

	su_node = fsdev->nd_su_node;
	ASSERT_VOP_LOCKED(NTOV(su_node), __func__);

	nandfs_seg_usage_blk_offset(fsdev, seg, &blk, &offset);

	error = nandfs_bread(su_node, blk, NOCRED, 0, &bp);
	if (error) {
		brelse(bp);
		return (error);
	}

	su_usage = SU_USAGE_OFF(bp, offset);
	su_usage->su_lastmod = fsdev->nd_ts.tv_sec;
	su_usage->su_flags = NANDFS_SEGMENT_USAGE_ERROR;

	DPRINTF(SEG, ("%s: seg:%#jx\n", __func__, (uintmax_t)seg));

	nandfs_dirty_buf(bp, 1);

	return (0);
}
示例#3
0
/* Update block count of segment */
int
nandfs_update_segment(struct nandfs_device *fsdev, uint64_t seg, uint32_t nblks)
{
	struct nandfs_node *su_node;
	struct nandfs_segment_usage *su_usage;
	struct buf *bp;
	uint64_t blk, offset;
	int error;

	su_node = fsdev->nd_su_node;
	ASSERT_VOP_LOCKED(NTOV(su_node), __func__);

	nandfs_seg_usage_blk_offset(fsdev, seg, &blk, &offset);

	error = nandfs_bread(su_node, blk, NOCRED, 0, &bp);
	if (error) {
		nandfs_error("%s: read block:%jx to update\n",
		    __func__, blk);
		brelse(bp);
		return (error);
	}

	su_usage = SU_USAGE_OFF(bp, offset);
	su_usage->su_lastmod = fsdev->nd_ts.tv_sec;
	su_usage->su_flags = NANDFS_SEGMENT_USAGE_DIRTY;
	su_usage->su_nblocks += nblks;

	DPRINTF(SEG, ("%s: seg:%#jx inc:%#x cur:%#x\n",  __func__,
	    (uintmax_t)seg, nblks, su_usage->su_nblocks));

	nandfs_dirty_buf(bp, 1);

	return (0);
}
示例#4
0
int
nandfs_free_entry(struct nandfs_mdt* mdt, struct nandfs_alloc_request *req)
{
	struct nandfs_block_group_desc *descriptors;
	uint64_t bitmap_idx, bitmap_off;
	uint64_t group;
	uint32_t *mask, maskrw;

	nandfs_calc_idx_entry(mdt, req->entrynum, &group, &bitmap_idx,
	    &bitmap_off);

	DPRINTF(ALLOC, ("nandfs_free_entry: req->entrynum=%jx bitmap_idx=%jx"
	   " bitmap_off=%jx group=%jx\n", (uintmax_t)req->entrynum,
	   (uintmax_t)bitmap_idx, (uintmax_t)bitmap_off, (uintmax_t)group));

	/* Update counter of free entries for group */
	descriptors = (struct nandfs_block_group_desc *) req->bp_desc->b_data;
	descriptors[group].bg_nfrees++;

	/* Set bit to indicate that entry is taken */
	mask = (uint32_t *)req->bp_bitmap->b_data;
	maskrw = mask[bitmap_idx];
	KASSERT(maskrw & (1 << bitmap_off), ("freeing unallocated vblock"));
	maskrw &= ~(1 << bitmap_off);
	mask[bitmap_idx] = maskrw;

	/* Make descriptor, bitmap and entry buffer dirty */
	if (nandfs_dirty_buf(req->bp_desc, 0) == 0) {
		nandfs_dirty_buf(req->bp_bitmap, 1);
		nandfs_dirty_buf(req->bp_entry, 1);
	} else {
		brelse(req->bp_bitmap);
		brelse(req->bp_entry);
		return (-1);
	}

	return (0);
}
示例#5
0
static int
nandfs_process_bdesc(struct nandfs_device *nffsdev, struct nandfs_bdesc *bd,
    uint64_t nmembs)
{
	struct nandfs_node *dat_node;
	struct buf *bp;
	uint64_t i;
	int error;

	dat_node = nffsdev->nd_dat_node;

	VOP_LOCK(NTOV(dat_node), LK_EXCLUSIVE);

	for (i = 0; i < nmembs; i++) {
		if (!bd[i].bd_alive)
			continue;
		DPRINTF(CLEAN, ("%s: idx %jx offset %jx\n",
		    __func__, i, bd[i].bd_offset));
		if (bd[i].bd_level) {
			error = nandfs_bread_meta(dat_node, bd[i].bd_offset,
			    NULL, 0, &bp);
			if (error) {
				nandfs_error("%s: cannot read dat node "
				    "level:%d\n", __func__, bd[i].bd_level);
				brelse(bp);
				VOP_UNLOCK(NTOV(dat_node), 0);
				return (error);
			}
			nandfs_dirty_buf_meta(bp, 1);
			nandfs_bmap_dirty_blocks(VTON(bp->b_vp), bp, 1);
		} else {
			error = nandfs_bread(dat_node, bd[i].bd_offset, NULL,
			    0, &bp);
			if (error) {
				nandfs_error("%s: cannot read dat node\n",
				    __func__);
				brelse(bp);
				VOP_UNLOCK(NTOV(dat_node), 0);
				return (error);
			}
			nandfs_dirty_buf(bp, 1);
		}
		DPRINTF(CLEAN, ("%s: bp: %p\n", __func__, bp));
	}

	VOP_UNLOCK(NTOV(dat_node), 0);

	return (0);
}
示例#6
0
int
nandfs_update_dirent(struct vnode *dvp, struct nandfs_node *fnode,
    struct nandfs_node *tnode)
{
	struct nandfs_node *dir_node;
	struct nandfs_dir_entry *dirent;
	struct buf *bp;
	uint64_t file_size, blocknr;
	uint32_t blocksize, off;
	uint8_t *pos;
	int error;

	dir_node = VTON(dvp);
	file_size = dir_node->nn_inode.i_size;
	if (!file_size)
		return (0);

	DPRINTF(LOOKUP,
	    ("chg direntry dvp %p ino %#jx  to in %#jx at off %#jx\n",
	    dvp, (uintmax_t)tnode->nn_ino, (uintmax_t)fnode->nn_ino,
	    (uintmax_t)tnode->nn_diroff));

	blocksize = dir_node->nn_nandfsdev->nd_blocksize;
	blocknr = tnode->nn_diroff / blocksize;
	off = tnode->nn_diroff % blocksize;
	error = nandfs_bread(dir_node, blocknr, NOCRED, 0, &bp);
	if (error) {
		brelse(bp);
		return (error);
	}

	pos = bp->b_data;
	dirent = (struct nandfs_dir_entry *) (pos + off);
	KASSERT((dirent->inode == tnode->nn_ino),
	    ("direntry mismatch"));

	dirent->inode = fnode->nn_ino;
	error = nandfs_dirty_buf(bp, 0);
	if (error)
		return (error);

	return (0);
}
示例#7
0
int
nandfs_vblock_end(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock)
{
	struct nandfs_node *dat;
	struct nandfs_mdt *mdt;
	struct nandfs_alloc_request req;
	struct nandfs_dat_entry *dat_entry;
	uint64_t end;
	uint32_t entry;
	int locked, error;

	dat = nandfsdev->nd_dat_node;
	mdt = &nandfsdev->nd_dat_mdt;
	end = nandfsdev->nd_last_cno;

	locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
	if (!locked)
		VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
	req.entrynum = vblock;

	error = nandfs_get_entry_block(mdt, dat, &req, &entry, 0);
	if (!error) {
		dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
		dat_entry[entry].de_end = end;
		DPRINTF(DAT, ("%s: end vblock %#jx at checkpoint %#jx\n",
		    __func__, (uintmax_t)vblock, (uintmax_t)end));

		/*
		 * It is mostly called from syncer() so
		 * we want to force making buf dirty
		 */
		error = nandfs_dirty_buf(req.bp_entry, 1);
	}

	if (!locked)
		VOP_UNLOCK(NTOV(dat), 0);

	return (error);
}
示例#8
0
int
nandfs_update_parent_dir(struct vnode *dvp, uint64_t newparent)
{
	struct nandfs_dir_entry *dirent;
	struct nandfs_node *dir_node;
	struct buf *bp;
	int error;

	dir_node = VTON(dvp);
	error = nandfs_bread(dir_node, 0, NOCRED, 0, &bp);
	if (error) {
		brelse(bp);
		return (error);
	}
	dirent = (struct nandfs_dir_entry *)bp->b_data;
	dirent->inode = newparent;
	error = nandfs_dirty_buf(bp, 0);
	if (error)
		return (error);

	return (0);
}
示例#9
0
/*
 * Make buffer dirty, it will be updated soon but first it need to be
 * gathered by syncer.
 */
int
nandfs_touch_segment(struct nandfs_device *fsdev, uint64_t seg)
{
	struct nandfs_node *su_node;
	struct buf *bp;
	uint64_t blk, offset;
	int error;

	su_node = fsdev->nd_su_node;
	ASSERT_VOP_LOCKED(NTOV(su_node), __func__);

	nandfs_seg_usage_blk_offset(fsdev, seg, &blk, &offset);

	error = nandfs_bread(su_node, blk, NOCRED, 0, &bp);
	if (error) {
		brelse(bp);
		nandfs_error("%s: cannot preallocate new segment\n", __func__);
		return (error);
	} else
		nandfs_dirty_buf(bp, 1);

	DPRINTF(SEG, ("%s: seg:%#jx\n", __func__, (uintmax_t)seg));
	return (error);
}
示例#10
0
/* Alloc new segment */
int
nandfs_alloc_segment(struct nandfs_device *fsdev, uint64_t *seg)
{
	struct nandfs_node *su_node;
	struct nandfs_sufile_header *su_header;
	struct nandfs_segment_usage *su_usage;
	struct buf *bp_header, *bp;
	uint64_t blk, vblk, offset, i, rest, nsegments;
	uint16_t seg_size;
	int error, found;

	seg_size = fsdev->nd_fsdata.f_segment_usage_size;
	nsegments = fsdev->nd_fsdata.f_nsegments;

	su_node = fsdev->nd_su_node;
	ASSERT_VOP_LOCKED(NTOV(su_node), __func__);

	/* Read header buffer */
	error = nandfs_bread(su_node, 0, NOCRED, 0, &bp_header);
	if (error) {
		brelse(bp_header);
		return (error);
	}

	su_header = (struct nandfs_sufile_header *)bp_header->b_data;

	/* Get last allocated segment */
	i = su_header->sh_last_alloc + 1;

	found = 0;
	bp = NULL;
	while (!found) {
		nandfs_seg_usage_blk_offset(fsdev, i, &blk, &offset);
		if(blk != 0) {
			error = nandfs_bmap_lookup(su_node, blk, &vblk);
			if (error) {
				nandfs_error("%s: cannot find vblk for blk "
				    "blk:%jx\n", __func__, blk);
				return (error);
			}
			if (vblk)
				error = nandfs_bread(su_node, blk, NOCRED, 0,
				    &bp);
			else
				error = nandfs_bcreate(su_node, blk, NOCRED, 0,
				    &bp);
			if (error) {
				nandfs_error("%s: cannot create/read "
				    "vblk:%jx\n", __func__, vblk);
				if (bp)
					brelse(bp);
				return (error);
			}

			su_usage = SU_USAGE_OFF(bp, offset);
		} else {
			su_usage = SU_USAGE_OFF(bp_header, offset);
			bp = bp_header;
		}

		rest = (fsdev->nd_blocksize - offset) / seg_size;
		/* Go through all su usage in block */
		while (rest) {
			/* When last check start from beggining */
			if (i == nsegments)
				break;

			if (!su_usage->su_flags) {
				su_usage->su_flags = 1;
				found = 1;
				break;
			}
			su_usage++;
			i++;

			/* If all checked return error */
			if (i == su_header->sh_last_alloc) {
				DPRINTF(SEG, ("%s: cannot allocate segment \n",
				    __func__));
				brelse(bp_header);
				if (blk != 0)
					brelse(bp);
				return (1);
			}
			rest--;
		}
		if (!found) {
			/* Otherwise read another block */
			if (blk != 0)
				brelse(bp);
			if (i == nsegments) {
				blk = 0;
				i = 0;
			} else
				blk++;
			offset = 0;
		}
	}

	if (found) {
		*seg = i;
		su_header->sh_last_alloc = i;
		su_header->sh_ncleansegs--;
		su_header->sh_ndirtysegs++;

		fsdev->nd_super.s_free_blocks_count = su_header->sh_ncleansegs *
		    fsdev->nd_fsdata.f_blocks_per_segment;
		fsdev->nd_clean_segs--;

		/*
		 * It is mostly called from syncer() so we want to force
		 * making buf dirty.
		 */
		error = nandfs_dirty_buf(bp_header, 1);
		if (error) {
			if (bp && bp != bp_header)
				brelse(bp);
			return (error);
		}
		if (bp && bp != bp_header)
			nandfs_dirty_buf(bp, 1);

		DPRINTF(SEG, ("%s: seg:%#jx\n", __func__, (uintmax_t)i));

		return (0);
	}

	DPRINTF(SEG, ("%s: failed\n", __func__));

	return (1);
}
示例#11
0
/* Make segment free */
int
nandfs_free_segment(struct nandfs_device *fsdev, uint64_t seg)
{
	struct nandfs_node *su_node;
	struct nandfs_sufile_header *su_header;
	struct nandfs_segment_usage *su_usage;
	struct buf *bp_header, *bp;
	uint64_t blk, offset;
	int error;

	su_node = fsdev->nd_su_node;
	ASSERT_VOP_LOCKED(NTOV(su_node), __func__);

	/* Read su header */
	error = nandfs_bread(su_node, 0, NOCRED, 0, &bp_header);
	if (error) {
		brelse(bp_header);
		return (error);
	}

	su_header = (struct nandfs_sufile_header *)bp_header->b_data;
	nandfs_seg_usage_blk_offset(fsdev, seg, &blk, &offset);

	/* Read su usage block if other than su header block */
	if (blk != 0) {
		error = nandfs_bread(su_node, blk, NOCRED, 0, &bp);
		if (error) {
			brelse(bp);
			brelse(bp_header);
			return (error);
		}
	} else
		bp = bp_header;

	/* Reset su usage data */
	su_usage = SU_USAGE_OFF(bp, offset);
	su_usage->su_lastmod = fsdev->nd_ts.tv_sec;
	su_usage->su_nblocks = 0;
	su_usage->su_flags = 0;

	/* Update clean/dirty counter in header */
	su_header->sh_ncleansegs++;
	su_header->sh_ndirtysegs--;

	/*
	 *  Make buffers dirty, called by cleaner
	 *  so force dirty even if no much space left
	 *  on device
	 */
	nandfs_dirty_buf(bp_header, 1);
	if (bp != bp_header)
		nandfs_dirty_buf(bp, 1);

	/* Update free block count */
	fsdev->nd_super.s_free_blocks_count = su_header->sh_ncleansegs *
	    fsdev->nd_fsdata.f_blocks_per_segment;
	fsdev->nd_clean_segs++;

	DPRINTF(SEG, ("%s: seg:%#jx\n", __func__, (uintmax_t)seg));

	return (0);
}
示例#12
0
static int
nandfs_cleaner_clean_segments(struct nandfs_device *nffsdev,
    struct nandfs_vinfo *vinfo, uint32_t nvinfo,
    struct nandfs_period *pd, uint32_t npd,
    struct nandfs_bdesc *bdesc, uint32_t nbdesc,
    uint64_t *segments, uint32_t nsegs)
{
	struct nandfs_node *gc;
	struct buf *bp;
	uint32_t i;
	int error = 0;

	gc = nffsdev->nd_gc_node;

	DPRINTF(CLEAN, ("%s: enter\n", __func__));

	VOP_LOCK(NTOV(gc), LK_EXCLUSIVE);
	for (i = 0; i < nvinfo; i++) {
		if (!vinfo[i].nvi_alive)
			continue;
		DPRINTF(CLEAN, ("%s: read vblknr:%#jx blk:%#jx\n",
		    __func__, (uintmax_t)vinfo[i].nvi_vblocknr,
		    (uintmax_t)vinfo[i].nvi_blocknr));
		error = nandfs_bread(nffsdev->nd_gc_node, vinfo[i].nvi_blocknr,
		    NULL, 0, &bp);
		if (error) {
			nandfs_error("%s:%d", __FILE__, __LINE__);
			VOP_UNLOCK(NTOV(gc), 0);
			goto out;
		}
		nandfs_vblk_set(bp, vinfo[i].nvi_vblocknr);
		nandfs_buf_set(bp, NANDFS_VBLK_ASSIGNED);
		nandfs_dirty_buf(bp, 1);
	}
	VOP_UNLOCK(NTOV(gc), 0);

	/* Delete checkpoints */
	for (i = 0; i < npd; i++) {
		DPRINTF(CLEAN, ("delete checkpoint: %jx\n",
		    (uintmax_t)pd[i].p_start));
		error = nandfs_delete_cp(nffsdev->nd_cp_node, pd[i].p_start,
		    pd[i].p_end);
		if (error) {
			nandfs_error("%s:%d", __FILE__, __LINE__);
			goto out;
		}
	}

	/* Update vblocks */
	for (i = 0; i < nvinfo; i++) {
		if (vinfo[i].nvi_alive)
			continue;
		DPRINTF(CLEAN, ("freeing vblknr: %jx\n", vinfo[i].nvi_vblocknr));
		error = nandfs_vblock_free(nffsdev, vinfo[i].nvi_vblocknr);
		if (error) {
			nandfs_error("%s:%d", __FILE__, __LINE__);
			goto out;
		}
	}

	error = nandfs_process_bdesc(nffsdev, bdesc, nbdesc);
	if (error) {
		nandfs_error("%s:%d", __FILE__, __LINE__);
		goto out;
	}

	/* Add segments to clean */
	if (nffsdev->nd_free_count) {
		nffsdev->nd_free_base = realloc(nffsdev->nd_free_base,
		    (nffsdev->nd_free_count + nsegs) * sizeof(uint64_t),
		    M_NANDFSTEMP, M_WAITOK | M_ZERO);
		memcpy(&nffsdev->nd_free_base[nffsdev->nd_free_count], segments,
		    nsegs * sizeof(uint64_t));
		nffsdev->nd_free_count += nsegs;
	} else {
		nffsdev->nd_free_base = malloc(nsegs * sizeof(uint64_t),
		    M_NANDFSTEMP, M_WAITOK|M_ZERO);
		memcpy(nffsdev->nd_free_base, segments,
		    nsegs * sizeof(uint64_t));
		nffsdev->nd_free_count = nsegs;
	}

out:

	DPRINTF(CLEAN, ("%s: exit error %d\n", __func__, error));

	return (error);
}
示例#13
0
int
nandfs_add_dirent(struct vnode *dvp, uint64_t ino, char *nameptr, long namelen,
    uint8_t type)
{
	struct nandfs_node *dir_node = VTON(dvp);
	struct nandfs_dir_entry *dirent, *pdirent;
	uint32_t blocksize = dir_node->nn_nandfsdev->nd_blocksize;
	uint64_t filesize = dir_node->nn_inode.i_size;
	uint64_t inode_blks = dir_node->nn_inode.i_blocks;
	uint32_t off, rest;
	uint8_t *pos;
	struct buf *bp;
	int error;

	pdirent = NULL;
	bp = NULL;
	if (inode_blks) {
		error = nandfs_bread(dir_node, inode_blks - 1, NOCRED, 0, &bp);
		if (error) {
			brelse(bp);
			return (error);
		}

		pos = bp->b_data;
		off = 0;
		while (off < blocksize) {
			pdirent = (struct nandfs_dir_entry *) (pos + off);
			if (!pdirent->rec_len) {
				pdirent = NULL;
				break;
			}
			off += pdirent->rec_len;
		}

		if (pdirent)
			rest = pdirent->rec_len -
			    NANDFS_DIR_REC_LEN(pdirent->name_len);
		else
			rest = blocksize;

		if (rest < NANDFS_DIR_REC_LEN(namelen)) {
			/* Do not update pdirent as new block is created */
			pdirent = NULL;
			brelse(bp);
			/* Set to NULL to create new */
			bp = NULL;
			filesize += rest;
		}
	}

	/* If no bp found create new */
	if (!bp) {
		error = nandfs_bcreate(dir_node, inode_blks, NOCRED, 0, &bp);
		if (error)
			return (error);
		off = 0;
		pos = bp->b_data;
	}

	/* Modify pdirent if exists */
	if (pdirent) {
		DPRINTF(LOOKUP, ("modify pdirent %p\n", pdirent));
		/* modify last de */
		off -= pdirent->rec_len;
		pdirent->rec_len =
		    NANDFS_DIR_REC_LEN(pdirent->name_len);
		off += pdirent->rec_len;
	}

	/* Create new dirent */
	dirent = (struct nandfs_dir_entry *) (pos + off);
	dirent->rec_len = blocksize - off;
	dirent->inode = ino;
	dirent->name_len = namelen;
	memset(dirent->name, 0, NANDFS_DIR_NAME_LEN(namelen));
	memcpy(dirent->name, nameptr, namelen);
	dirent->file_type = type;

	filesize += NANDFS_DIR_REC_LEN(dirent->name_len);

	DPRINTF(LOOKUP, ("create dir_entry '%.*s' at %p with size %x "
	    "new filesize: %jx\n",
	    (int)namelen, dirent->name, dirent, dirent->rec_len,
	    (uintmax_t)filesize));

	error = nandfs_dirty_buf(bp, 0);
	if (error)
		return (error);

	dir_node->nn_inode.i_size = filesize;
	dir_node->nn_flags |= IN_CHANGE | IN_UPDATE;
	vnode_pager_setsize(dvp, filesize);

	return (0);
}
示例#14
0
int
nandfs_remove_dirent(struct vnode *dvp, struct nandfs_node *node,
    struct componentname *cnp)
{
	struct nandfs_node *dir_node;
	struct nandfs_dir_entry *dirent, *pdirent;
	struct buf *bp;
	uint64_t filesize, blocknr, ino, offset;
	uint32_t blocksize, limit, off;
	uint16_t newsize;
	uint8_t *pos;
	int error, found;

	dir_node = VTON(dvp);
	filesize = dir_node->nn_inode.i_size;
	if (!filesize)
		return (0);

	if (node) {
		offset = node->nn_diroff;
		ino = node->nn_ino;
	} else {
		offset = dir_node->nn_diroff;
		ino = NANDFS_WHT_INO;
	}

	dirent = pdirent = NULL;
	blocksize = dir_node->nn_nandfsdev->nd_blocksize;
	blocknr = offset / blocksize;

	DPRINTF(LOOKUP, ("rm direntry dvp %p node %p ino %#jx at off %#jx\n",
	    dvp, node, (uintmax_t)ino, (uintmax_t)offset));

	error = nandfs_bread(dir_node, blocknr, NOCRED, 0, &bp);
	if (error) {
		brelse(bp);
		return (error);
	}

	pos = bp->b_data;
	off = 0;
	found = 0;
	limit = offset % blocksize;
	pdirent = (struct nandfs_dir_entry *) bp->b_data;
	while (off <= limit) {
		dirent = (struct nandfs_dir_entry *) (pos + off);

		if ((off == limit) &&
		    (dirent->inode == ino)) {
			found = 1;
			break;
		}
		if (dirent->inode != 0)
			pdirent = dirent;
		off += dirent->rec_len;
	}

	if (!found) {
		nandfs_error("cannot find entry to remove");
		brelse(bp);
		return (error);
	}
	DPRINTF(LOOKUP,
	    ("rm dirent ino %#jx at %#x with size %#x\n",
	    (uintmax_t)dirent->inode, off, dirent->rec_len));

	newsize = (uintptr_t)dirent - (uintptr_t)pdirent;
	newsize += dirent->rec_len;
	pdirent->rec_len = newsize;
	dirent->inode = 0;
	error = nandfs_dirty_buf(bp, 0);
	if (error)
		return (error);

	dir_node->nn_flags |= IN_CHANGE | IN_UPDATE;
	/* If last one modify filesize */
	if ((offset + NANDFS_DIR_REC_LEN(dirent->name_len)) == filesize) {
		filesize = blocknr * blocksize +
		    ((uintptr_t)pdirent - (uintptr_t)pos) +
		    NANDFS_DIR_REC_LEN(pdirent->name_len);
		dir_node->nn_inode.i_size = filesize;
	}

	return (0);
}