MFV v242732:

Merge the ZFS I/O deadman thread from vendor (illumos).
This feature panics the system on hanging ZFS I/O, helps debugging
and resumes failed service.

The panic behavior can be controlled with the loader-only tunables:
vfs.zfs.deadman_enabled (enable or disable panic on stalled ZFS I/O)
vfs.zfs.deadman_synctime (expiration time for stalled ZFS I/O)

By default, ZFS I/O deadman is enabled by default on amd64 and i386
excluding virtual guest machines.

Illumos ZFS issues:
  3246 ZFS I/O deadman thread

References:
  https://www.illumos.org/issues/3246

MFC after:	2 weeks

1 files changed, 15 insertions, 0 deletions

diff --git a/cddl/contrib/opensolaris/cmd/zinject/translate.c b/cddl/contrib/opensolaris/cmd/zinject/translate.c
index 442f220..af25d3c 100644
--- a/cddl/contrib/opensolaris/cmd/zinject/translate.c
+++ b/cddl/contrib/opensolaris/cmd/zinject/translate.c
@@ -20,6 +20,7 @@
  */
 /*
  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
 #include <libzfs.h>
@@ -455,6 +456,20 @@ translate_device(const char *pool, const char *device, err_type_t label_type,
 		    &record->zi_guid) == 0);
 	}
 
+	/*
+	 * Device faults can take on three different forms:
+	 * 1). delayed or hanging I/O
+	 * 2). zfs label faults
+	 * 3). generic disk faults
+	 */
+	if (record->zi_timer != 0) {
+		record->zi_cmd = ZINJECT_DELAY_IO;
+	} else if (label_type != TYPE_INVAL) {
+		record->zi_cmd = ZINJECT_LABEL_FAULT;
+	} else {
+		record->zi_cmd = ZINJECT_DEVICE_FAULT;
+	}
+
 	switch (label_type) {
 	case TYPE_LABEL_UBERBLOCK:
 		record->zi_start = offsetof(vdev_label_t, vl_uberblock[0]);