Rebase master to b117

1 files changed, 38 insertions, 6 deletions

diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c
index 1b9247d66..1f91fc1ad 100644
--- a/module/zfs/dmu_object.c
+++ b/module/zfs/dmu_object.c
@@ -19,12 +19,10 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 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>
@@ -108,22 +106,56 @@ dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
 
 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)
+    int blocksize, dmu_object_type_t bonustype, int bonuslen)
 {
 	dnode_t *dn;
+	dmu_tx_t *tx;
+	int nblkptr;
 	int err;
 
-	if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx))
+	if (object == DMU_META_DNODE_OBJECT)
 		return (EBADF);
 
 	err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
 	    FTAG, &dn);
 	if (err)
 		return (err);
+
+	if (dn->dn_type == ot && dn->dn_datablksz == blocksize &&
+	    dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) {
+		/* nothing is changing, this is a noop */
+		dnode_rele(dn, FTAG);
+		return (0);
+	}
+
+	nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT);
+
+	/*
+	 * If we are losing blkptrs or changing the block size this must
+	 * be a new file instance.   We must clear out the previous file
+	 * contents before we can change this type of metadata in the dnode.
+	 */
+	if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) {
+		err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END);
+		if (err)
+			goto out;
+	}
+
+	tx = dmu_tx_create(os);
+	dmu_tx_hold_bonus(tx, object);
+	err = dmu_tx_assign(tx, TXG_WAIT);
+	if (err) {
+		dmu_tx_abort(tx);
+		goto out;
+	}
+
 	dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx);
+
+	dmu_tx_commit(tx);
+out:
 	dnode_rele(dn, FTAG);
 
-	return (0);
+	return (err);
 }
 
 int