zpool iostat -k shows kind of vdevs: ssd, hdd or mixed.

cmd/zpool/zpool_main.c

@@ -152,15 +152,17 @@ enum iostat_type {
 	IOS_DEFAULT = 0,
 	IOS_LATENCY = 1,
 	IOS_QUEUES = 2,
-	IOS_L_HISTO = 3,
-	IOS_RQ_HISTO = 4,
+	IOS_KIND = 3,
+	IOS_L_HISTO = 4,
+	IOS_RQ_HISTO = 5,
 	IOS_COUNT,	/* always last element */
 };
 
 /* iostat_type entries as bitmasks */
 #define	IOS_DEFAULT_M	(1ULL << IOS_DEFAULT)
 #define	IOS_LATENCY_M	(1ULL << IOS_LATENCY)
 #define	IOS_QUEUES_M	(1ULL << IOS_QUEUES)
+#define	IOS_KIND_M	(1ULL << IOS_KIND)
 #define	IOS_L_HISTO_M	(1ULL << IOS_L_HISTO)
 #define	IOS_RQ_HISTO_M	(1ULL << IOS_RQ_HISTO)
 
@@ -197,6 +199,9 @@ static const char *vsx_type_to_nvlist[IOS_COUNT][11] = {
 	    ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE,
 	    ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE,
 	    NULL},
+	[IOS_KIND] = {
+	    ZPOOL_CONFIG_VDEV_KIND,
+	    NULL},
 	[IOS_RQ_HISTO] = {
 	    ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO,
 	    ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO,
@@ -312,7 +317,7 @@ get_usage(zpool_help_t idx) {
 		    "[-R root] [-F [-n]]\n"
 		    "\t    <pool | id> [newpool]\n"));
 	case HELP_IOSTAT:
-		return (gettext("\tiostat [-T d | u] [-ghHLpPvy] "
+		return (gettext("\tiostat [-T d | u] [-ghHkLpPvy] "
 		    "[[-lq]|[-r|-w]]\n"
 		    "\t    [[pool ...]|[pool vdev ...]|[vdev ...]] "
 		    "[interval [count]]\n"));
@@ -1455,6 +1460,30 @@ max_width(zpool_handle_t *zhp, nvlist_t *nv, int depth, int max,
 	return (max);
 }
 
+static const char *
+kind_mark(nvlist_t *nv)
+{
+	nvlist_t *nvx;
+	uint64_t kind = VDEV_KIND_UNKNOWN;
+
+	if (nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_VDEV_STATS_EX, &nvx) == 0)
+		nvlist_lookup_uint64(nvx, ZPOOL_CONFIG_VDEV_KIND,
+		    &kind);
+
+	switch (kind) {
+	case VDEV_KIND_SSD:
+		return ("ssd");
+	case VDEV_KIND_FILE:
+		return ("file");
+	case VDEV_KIND_MIXED:
+		return ("mix");
+	case VDEV_KIND_HDD:
+		return ("hdd");
+	default:
+		return ("?");
+	}
+}
+
 typedef struct spare_cbdata {
 	uint64_t	cb_guid;
 	zpool_handle_t	*cb_zhp;
@@ -2628,6 +2657,7 @@ static const name_and_columns_t iostat_top_labels[][IOSTAT_MAX_LABELS] =
 	[IOS_QUEUES] = {{"syncq_read", 2}, {"syncq_write", 2},
 	    {"asyncq_read", 2}, {"asyncq_write", 2}, {"scrubq_read", 2},
 	    {NULL}},
+	[IOS_KIND] = {{"", 1}, {NULL}},
 	[IOS_L_HISTO] = {{"total_wait", 2}, {"disk_wait", 2},
 	    {"sync_queue", 2}, {"async_queue", 2}, {NULL}},
 	[IOS_RQ_HISTO] = {{"sync_read", 2}, {"sync_write", 2},
@@ -2644,6 +2674,7 @@ static const name_and_columns_t iostat_bottom_labels[][IOSTAT_MAX_LABELS] =
 	    {"write"}, {"read"}, {"write"}, {"wait"}, {NULL}},
 	[IOS_QUEUES] = {{"pend"}, {"activ"}, {"pend"}, {"activ"}, {"pend"},
 	    {"activ"}, {"pend"}, {"activ"}, {"pend"}, {"activ"}, {NULL}},
+	[IOS_KIND] = {{"kind"}, {NULL}},
 	[IOS_L_HISTO] = {{"read"}, {"write"}, {"read"}, {"write"}, {"read"},
 	    {"write"}, {"read"}, {"write"}, {"scrub"}, {NULL}},
 	[IOS_RQ_HISTO] = {{"ind"}, {"agg"}, {"ind"}, {"agg"}, {"ind"}, {"agg"},
@@ -2706,9 +2737,10 @@ default_column_width(iostat_cbdata_t *cb, enum iostat_type type)
 		[IOS_DEFAULT] = 15, /* 1PB capacity */
 		[IOS_LATENCY] = 10, /* 1B ns = 10sec */
 		[IOS_QUEUES] = 6,   /* 1M queue entries */
+		[IOS_KIND] = 4,	    /* kind/file/ssd/hdd/mix */
 	};
 
-	if (cb->cb_literal)
+	if (cb->cb_literal || type == IOS_KIND)
 		column_width = widths[type];
 
 	return (column_width);
@@ -3411,6 +3443,9 @@ print_vdev_stats(zpool_handle_t *zhp, const char *name, nvlist_t *oldnv,
 		print_iostat_latency(cb, oldnv, newnv, scale);
 	if (cb->cb_flags & IOS_QUEUES_M)
 		print_iostat_queues(cb, oldnv, newnv, scale);
+	if (cb->cb_flags & IOS_KIND_M)
+		printf("%s%4s", cb->cb_scripted ? "\t" : "  ",
+		    kind_mark(newnv));
 	if (cb->cb_flags & IOS_ANYHISTO_M) {
 		printf("\n");
 		print_iostat_histos(cb, oldnv, newnv, scale, name);
@@ -3959,7 +3994,7 @@ fsleep(float sec) {
 
 
 /*
- * zpool iostat [-c CMD] [-ghHLpPvy] [[-lq]|[-r|-w]] [-n name] [-T d|u]
+ * zpool iostat [-c CMD] [-ghHkLpPvy] [[-lq]|[-r|-w]] [-n name] [-T d|u]
  *		[[ pool ...]|[pool vdev ...]|[vdev ...]]
  *		[interval [count]]
  *
@@ -3972,6 +4007,7 @@ fsleep(float sec) {
  *	-p	Display values in parsable (exact) format.
  *	-H	Scripted mode.  Don't display headers, and separate properties
  *		by a single tab.
+ *	-k      Display kind of device, e.g. solid-state or mixed.
  *	-l	Display average latency
  *	-q	Display queue depths
  *	-w	Display latency histograms
@@ -4000,6 +4036,7 @@ zpool_do_iostat(int argc, char **argv)
 	boolean_t guid = B_FALSE;
 	boolean_t follow_links = B_FALSE;
 	boolean_t full_name = B_FALSE;
+	boolean_t kind = B_FALSE;
 	iostat_cbdata_t cb = { 0 };
 	char *cmd = NULL;
 
@@ -4010,7 +4047,7 @@ zpool_do_iostat(int argc, char **argv)
 	uint64_t unsupported_flags;
 
 	/* check options */
-	while ((c = getopt(argc, argv, "c:gLPT:vyhplqrwH")) != -1) {
+	while ((c = getopt(argc, argv, "c:gLPT:vyhpklqrwH")) != -1) {
 		switch (c) {
 		case 'c':
 			cmd = optarg;
@@ -4033,6 +4070,9 @@ zpool_do_iostat(int argc, char **argv)
 		case 'p':
 			parsable = B_TRUE;
 			break;
+		case 'k':
+			kind = B_TRUE;
+			break;
 		case 'l':
 			latency = B_TRUE;
 			break;
@@ -4183,6 +4223,8 @@ zpool_do_iostat(int argc, char **argv)
 			cb.cb_flags |= IOS_LATENCY_M;
 		if (queues)
 			cb.cb_flags |= IOS_QUEUES_M;
+		if (kind)
+			cb.cb_flags |= IOS_KIND_M;
 	}
 
 	/*

man/man8/zpool.8

@@ -96,7 +96,7 @@ zpool \- configures ZFS storage pools
 
 .LP
 .nf
-\fB\fBzpool iostat\fR [\fB-c\fR \fBCMD\fR] [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [\fB-lq\fR]|[\fB-r\fR|-\fBw\fR]]
+\fB\fBzpool iostat\fR [\fB-c\fR \fBCMD\fR] [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHkLpPvy\fR] [\fB-lq\fR]|[\fB-r\fR|-\fBw\fR]]
      [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
 
 .fi
@@ -1523,7 +1523,7 @@ Scan using the default search path, the libblkid cache will not be consulted.  A
 .sp
 .ne 2
 .na
-\fB\fBzpool iostat\fR [\fB-c\fR \fBCMD\fR] [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHLpPvy\fR] [[\fB-lq\fR]|[\fB-r\fR|\fB-w\fR]] [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
+\fB\fBzpool iostat\fR [\fB-c\fR \fBCMD\fR] [\fB-T\fR \fBd\fR | \fBu\fR] [\fB-ghHkLpPvy\fR] [[\fB-lq\fR]|[\fB-r\fR|\fB-w\fR]] [[\fIpool\fR ...]|[\fIpool vdev\fR ...]|[\fIvdev\fR ...]] [\fIinterval\fR[\fIcount\fR]]\fR
 
 .ad
 .sp .6
@@ -1585,6 +1585,15 @@ Display vdev GUIDs instead of the normal device names. These GUIDs can be used i
 Scripted mode. Do not display headers, and separate fields by a single tab instead of arbitrary space.
 .RE
 
+.sp
+.ne 2
+.na
+\fB\fB-k\fR\fR
+.ad
+.RS 12n
+Display the kind of device a pool or vdev is based on: ssd, hdd or file.  Mixed mirror vdevs that have both ssd (or file) and hdd members are marked "mix".  A pool is considered mixed if all members are at least mixed, i.e. no pure hdd.
+.RE
+
 .sp
 .ne 2
 .na