Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

This bring huge amount of changes, I'll enumerate only user-visible changes:

- Delegated Administration

	Allows regular users to perform ZFS operations, like file system
	creation, snapshot creation, etc.

- L2ARC

	Level 2 cache for ZFS - allows to use additional disks for cache.
	Huge performance improvements mostly for random read of mostly
	static content.

- slog

	Allow to use additional disks for ZFS Intent Log to speed up
	operations like fsync(2).

- vfs.zfs.super_owner

	Allows regular users to perform privileged operations on files stored
	on ZFS file systems owned by him. Very careful with this one.

- chflags(2)

	Not all the flags are supported. This still needs work.

- ZFSBoot

	Support to boot off of ZFS pool. Not finished, AFAIK.

	Submitted by:	dfr

- Snapshot properties

- New failure modes

	Before if write requested failed, system paniced. Now one
	can select from one of three failure modes:
	- panic - panic on write error
	- wait - wait for disk to reappear
	- continue - serve read requests if possible, block write requests

- Refquota, refreservation properties

	Just quota and reservation properties, but don't count space consumed
	by children file systems, clones and snapshots.

- Sparse volumes

	ZVOLs that don't reserve space in the pool.

- External attributes

	Compatible with extattr(2).

- NFSv4-ACLs

	Not sure about the status, might not be complete yet.

	Submitted by:	trasz

- Creation-time properties

- Regression tests for zpool(8) command.

Obtained from:	OpenSolaris

1 files changed, 11 insertions, 11 deletions

diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_root.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_root.c
index 0e8752c..88383f0 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_root.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_root.c
@@ -19,12 +19,10 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/zfs_context.h>
 #include <sys/spa.h>
 #include <sys/vdev_impl.h>
@@ -44,18 +42,17 @@
  * probably fine.  Adding bean counters during alloc/free can make this
  * future guesswork more accurate.
  */
-/*ARGSUSED*/
 static int
 too_many_errors(vdev_t *vd, int numerrors)
 {
+	ASSERT3U(numerrors, <=, vd->vdev_children);
 	return (numerrors > 0);
 }
 
 static int
 vdev_root_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
 {
-	vdev_t *cvd;
-	int c, error;
+	int c;
 	int lasterror = 0;
 	int numerrors = 0;
 
@@ -65,9 +62,11 @@ vdev_root_open(vdev_t *vd, uint64_t *asize, uint64_t *ashift)
 	}
 
 	for (c = 0; c < vd->vdev_children; c++) {
-		cvd = vd->vdev_child[c];
+		vdev_t *cvd = vd->vdev_child[c];
+		int error;
 
-		if ((error = vdev_open(cvd)) != 0) {
+		if ((error = vdev_open(cvd)) != 0 &&
+		    !cvd->vdev_islog) {
 			lasterror = error;
 			numerrors++;
 			continue;
@@ -97,13 +96,14 @@ vdev_root_close(vdev_t *vd)
 static void
 vdev_root_state_change(vdev_t *vd, int faulted, int degraded)
 {
-	if (too_many_errors(vd, faulted))
+	if (too_many_errors(vd, faulted)) {
 		vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
 		    VDEV_AUX_NO_REPLICAS);
-	else if (degraded != 0)
+	} else if (degraded) {
 		vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, VDEV_AUX_NONE);
-	else
+	} else {
 		vdev_set_state(vd, B_FALSE, VDEV_STATE_HEALTHY, VDEV_AUX_NONE);
+	}
 }
 
 vdev_ops_t vdev_root_ops = {