Move the world out of /zfs/ and seperate out module build tree

1 files changed, 162 insertions, 0 deletions

diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c
new file mode 100644
index 000000000..1b9247d66
--- /dev/null
+++ b/module/zfs/dmu_object.c
@@ -0,0 +1,162 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/dmu_tx.h>
+#include <sys/dnode.h>
+
+uint64_t
+dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize,
+    dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	objset_impl_t *osi = os->os;
+	uint64_t object;
+	uint64_t L2_dnode_count = DNODES_PER_BLOCK <<
+	    (osi->os_meta_dnode->dn_indblkshift - SPA_BLKPTRSHIFT);
+	dnode_t *dn = NULL;
+	int restarted = B_FALSE;
+
+	mutex_enter(&osi->os_obj_lock);
+	for (;;) {
+		object = osi->os_obj_next;
+		/*
+		 * Each time we polish off an L2 bp worth of dnodes
+		 * (2^13 objects), move to another L2 bp that's still
+		 * reasonably sparse (at most 1/4 full).  Look from the
+		 * beginning once, but after that keep looking from here.
+		 * If we can't find one, just keep going from here.
+		 */
+		if (P2PHASE(object, L2_dnode_count) == 0) {
+			uint64_t offset = restarted ? object << DNODE_SHIFT : 0;
+			int error = dnode_next_offset(osi->os_meta_dnode,
+			    DNODE_FIND_HOLE,
+			    &offset, 2, DNODES_PER_BLOCK >> 2, 0);
+			restarted = B_TRUE;
+			if (error == 0)
+				object = offset >> DNODE_SHIFT;
+		}
+		osi->os_obj_next = ++object;
+
+		/*
+		 * XXX We should check for an i/o error here and return
+		 * up to our caller.  Actually we should pre-read it in
+		 * dmu_tx_assign(), but there is currently no mechanism
+		 * to do so.
+		 */
+		(void) dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE,
+		    FTAG, &dn);
+		if (dn)
+			break;
+
+		if (dmu_object_next(os, &object, B_TRUE, 0) == 0)
+			osi->os_obj_next = object - 1;
+	}
+
+	dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
+	dnode_rele(dn, FTAG);
+
+	mutex_exit(&osi->os_obj_lock);
+
+	dmu_tx_add_new_object(tx, os, object);
+	return (object);
+}
+
+int
+dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
+		return (EBADF);
+
+	err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_FREE, FTAG, &dn);
+	if (err)
+		return (err);
+	dnode_allocate(dn, ot, blocksize, 0, bonustype, bonuslen, tx);
+	dnode_rele(dn, FTAG);
+
+	dmu_tx_add_new_object(tx, os, object);
+	return (0);
+}
+
+int
+dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
+    int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
+		return (EBADF);
+
+	err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
+	    FTAG, &dn);
+	if (err)
+		return (err);
+	dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
+	dnode_rele(dn, FTAG);
+
+	return (0);
+}
+
+int
+dmu_object_free(objset_t *os, uint64_t object, dmu_tx_t *tx)
+{
+	dnode_t *dn;
+	int err;
+
+	ASSERT(object != DMU_META_DNODE_OBJECT || dmu_tx_private_ok(tx));
+
+	err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
+	    FTAG, &dn);
+	if (err)
+		return (err);
+
+	ASSERT(dn->dn_type != DMU_OT_NONE);
+	dnode_free_range(dn, 0, DMU_OBJECT_END, tx);
+	dnode_free(dn, tx);
+	dnode_rele(dn, FTAG);
+
+	return (0);
+}
+
+int
+dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
+{
+	uint64_t offset = (*objectp + 1) << DNODE_SHIFT;
+	int error;
+
+	error = dnode_next_offset(os->os->os_meta_dnode,
+	    (hole ? DNODE_FIND_HOLE : 0), &offset, 0, DNODES_PER_BLOCK, txg);
+
+	*objectp = offset >> DNODE_SHIFT;
+
+	return (error);
+}