1 files changed, 230 insertions, 0 deletions
diff --git a/sys/fs/nandfs/nandfs_bmap.c b/sys/fs/nandfs/nandfs_bmap.c
new file mode 100644
index 0000000..9f800b8
--- /dev/null
+++ b/sys/fs/nandfs/nandfs_bmap.c
@@ -0,0 +1,230 @@
+/*-
+ * 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_subr.c,v 1.4 2009/07/29 17:06:57 reinoud
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/kernel.h>
+#include <sys/stat.h>
+#include <sys/buf.h>
+#include <sys/bio.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/signalvar.h>
+#include <sys/malloc.h>
+#include <sys/dirent.h>
+#include <sys/lockf.h>
+#include <sys/ktr.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 <vm/vm.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_object.h>
+#include <vm/vnode_pager.h>
+
+#include "nandfs_mount.h"
+#include "nandfs.h"
+#include "nandfs_subr.h"
+#include "bmap.h"
+
+nandfs_lbn_t
+nandfs_get_maxfilesize(struct nandfs_device *fsdev)
+{
+
+	return (get_maxfilesize(fsdev));
+}
+
+int
+nandfs_bmap_lookup(struct nandfs_node *node, nandfs_lbn_t lblk,
+    nandfs_daddr_t *vblk)
+{
+	int error = 0;
+
+	if (node->nn_ino == NANDFS_GC_INO && lblk >= 0)
+		*vblk = lblk;
+	else
+		error = bmap_lookup(node, lblk, vblk);
+
+	DPRINTF(TRANSLATE, ("%s: error %d ino %#jx lblocknr %#jx -> %#jx\n",
+	    __func__, error, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
+	    (uintmax_t)*vblk));
+
+	if (error)
+		nandfs_error("%s: returned %d", __func__, error);
+
+	return (error);
+}
+
+int
+nandfs_bmap_insert_block(struct nandfs_node *node, nandfs_lbn_t lblk,
+    struct buf *bp)
+{
+	struct nandfs_device *fsdev;
+	nandfs_daddr_t vblk;
+	int error;
+
+	fsdev = node->nn_nandfsdev;
+
+	vblk = 0;
+	if (node->nn_ino != NANDFS_DAT_INO) {
+		error = nandfs_vblock_alloc(fsdev, &vblk);
+		if (error)
+			return (error);
+	}
+
+	nandfs_buf_set(bp, NANDFS_VBLK_ASSIGNED);
+	nandfs_vblk_set(bp, vblk);
+
+	error = bmap_insert_block(node, lblk, vblk);
+	if (error) {
+		nandfs_vblock_free(fsdev, vblk);
+		return (error);
+	}
+
+	return (0);
+}
+
+int
+nandfs_bmap_dirty_blocks(struct nandfs_node *node, struct buf *bp, int force)
+{
+	int error;
+
+	error = bmap_dirty_meta(node, bp->b_lblkno, force);
+	if (error)
+		nandfs_error("%s: cannot dirty buffer %p\n",
+		    __func__, bp);
+
+	return (error);
+}
+
+static int
+nandfs_bmap_update_mapping(struct nandfs_node *node, nandfs_lbn_t lblk,
+    nandfs_daddr_t blknr)
+{
+	int error;
+
+	DPRINTF(BMAP,
+	    ("%s: node: %p ino: %#jx lblk: %#jx vblk: %#jx\n",
+	    __func__, node, (uintmax_t)node->nn_ino, (uintmax_t)lblk,
+	    (uintmax_t)blknr));
+
+	error = bmap_insert_block(node, lblk, blknr);
+
+	return (error);
+}
+
+int
+nandfs_bmap_update_block(struct nandfs_node *node, struct buf *bp,
+    nandfs_lbn_t blknr)
+{
+	nandfs_lbn_t lblk;
+	int error;
+
+	lblk = bp->b_lblkno;
+	nandfs_vblk_set(bp, blknr);
+
+	DPRINTF(BMAP, ("%s: node: %p ino: %#jx bp: %p lblk: %#jx blk: %#jx\n",
+	    __func__, node, (uintmax_t)node->nn_ino, bp,
+	    (uintmax_t)lblk, (uintmax_t)blknr));
+
+	error = nandfs_bmap_update_mapping(node, lblk, blknr);
+	if (error) {
+		nandfs_error("%s: cannot update lblk:%jx to blk:%jx for "
+		    "node:%p, error:%d\n", __func__, (uintmax_t)lblk,
+		    (uintmax_t)blknr, node, error);
+		return (error);
+	}
+
+	return (error);
+}
+
+int
+nandfs_bmap_update_dat(struct nandfs_node *node, nandfs_daddr_t oldblk,
+    struct buf *bp)
+{
+	struct nandfs_device *fsdev;
+	nandfs_daddr_t vblk = 0;
+	int error;
+
+	if (node->nn_ino == NANDFS_DAT_INO)
+		return (0);
+
+	if (nandfs_buf_check(bp, NANDFS_VBLK_ASSIGNED)) {
+		nandfs_buf_clear(bp, NANDFS_VBLK_ASSIGNED);
+		return (0);
+	}
+
+	fsdev = node->nn_nandfsdev;
+
+	/* First alloc new virtual block.... */
+	error = nandfs_vblock_alloc(fsdev, &vblk);
+	if (error)
+		return (error);
+
+	error = nandfs_bmap_update_block(node, bp, vblk);
+	if (error)
+		return (error);
+
+	/* Then we can end up with old one */
+	nandfs_vblock_end(fsdev, oldblk);
+
+	DPRINTF(BMAP,
+	    ("%s: ino %#jx block %#jx: update vblk %#jx to %#jx\n",
+	    __func__, (uintmax_t)node->nn_ino, (uintmax_t)bp->b_lblkno,
+	    (uintmax_t)oldblk, (uintmax_t)vblk));
+	return (error);
+}
+
+int
+nandfs_bmap_truncate_mapping(struct nandfs_node *node, nandfs_lbn_t oblk,
+    nandfs_lbn_t nblk)
+{
+	nandfs_lbn_t todo;
+	int error;
+
+	todo = oblk - nblk;
+
+	DPRINTF(BMAP, ("%s: node %p oblk %jx nblk %jx truncate by %jx\n",
+	    __func__, node, oblk, nblk, todo));
+
+	error = bmap_truncate_mapping(node, oblk, todo);
+	if (error)
+		return (error);
+
+	return (error);
+}