From 187632dcef255acfbeff203d96b00904eb1e1c0a Mon Sep 17 00:00:00 2001
From: Mike Harsch <mike@harschsystems.com>
Date: Mon, 23 Apr 2012 17:52:50 -0400
Subject: [PATCH] Illumos #952: separate intent logs should be obvious in
 'zpool iostat' output

Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Garrett D'Amore <garrett@nexenta.com>
Approved by: Eric Schrock <eric.schrock@delphix.com>

Refererce to Illumos issue:
  https://www.illumos.org/issues/952

Ported-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #607
---
 cmd/zpool/zpool_main.c | 36 +++++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/cmd/zpool/zpool_main.c b/cmd/zpool/zpool_main.c
index 5dbb11935b..a6c5a47231 100644
--- a/cmd/zpool/zpool_main.c
+++ b/cmd/zpool/zpool_main.c
@@ -2086,10 +2086,15 @@ print_vdev_stats(zpool_handle_t *zhp, const char *name, nvlist_t *oldnv,
 		return;
 
 	for (c = 0; c < children; c++) {
-		uint64_t ishole = B_FALSE;
+		uint64_t ishole = B_FALSE, islog = B_FALSE;
 
-		if (nvlist_lookup_uint64(newchild[c],
-		    ZPOOL_CONFIG_IS_HOLE, &ishole) == 0 && ishole)
+		(void) nvlist_lookup_uint64(newchild[c], ZPOOL_CONFIG_IS_HOLE,
+		    &ishole);
+
+		(void) nvlist_lookup_uint64(newchild[c], ZPOOL_CONFIG_IS_LOG,
+		    &islog);
+
+		if (ishole || islog)
 			continue;
 
 		vname = zpool_vdev_name(g_zfs, zhp, newchild[c], B_FALSE);
@@ -2098,6 +2103,31 @@ print_vdev_stats(zpool_handle_t *zhp, const char *name, nvlist_t *oldnv,
 		free(vname);
 	}
 
+	/*
+	 * Log device section
+	 */
+
+	if (num_logs(newnv) > 0) {
+		(void) printf("%-*s      -      -      -      -      -      "
+		    "-\n", cb->cb_namewidth, "logs");
+
+		for (c = 0; c < children; c++) {
+			uint64_t islog = B_FALSE;
+			(void) nvlist_lookup_uint64(newchild[c],
+			    ZPOOL_CONFIG_IS_LOG, &islog);
+
+			if (islog) {
+				vname = zpool_vdev_name(g_zfs, zhp, newchild[c],
+				    B_FALSE);
+				print_vdev_stats(zhp, vname, oldnv ?
+				    oldchild[c] : NULL, newchild[c],
+				    cb, depth + 2);
+				free(vname);
+			}
+		}
+
+	}
+
 	/*
 	 * Include level 2 ARC devices in iostat output
 	 */