Add physical device size to SIZE column in 'zpool list -v'

Add physical device size/capacity only for physical devices in
'zpool list -v' instead of displaying "-" in the SIZE column.
This would make it easier to see the individual device capacity and
to determine which spares are large enough to replace which devices.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Dipak Ghosh <dipak.ghosh@hpe.com>
Signed-off-by: Akash B <akash-b@hpe.com>
Closes openzfs#12561

cmd/zpool/zpool_main.c

@@ -6067,6 +6067,7 @@ print_one_column(zpool_prop_t prop, uint64_t value, const char *str,
 	size_t width = zprop_width(prop, &fixed, ZFS_TYPE_POOL);
 
 	switch (prop) {
+	case ZPOOL_PROP_SIZE:
 	case ZPOOL_PROP_EXPANDSZ:
 	case ZPOOL_PROP_CHECKPOINT:
 	case ZPOOL_PROP_DEDUPRATIO:
@@ -6162,8 +6163,12 @@ print_list_stats(zpool_handle_t *zhp, const char *name, nvlist_t *nv,
 		 * 'toplevel' boolean value is passed to the print_one_column()
 		 * to indicate that the value is valid.
 		 */
-		print_one_column(ZPOOL_PROP_SIZE, vs->vs_space, NULL, scripted,
-		    toplevel, format);
+		if (toplevel && (vs->vs_pspace == 0))
+			print_one_column(ZPOOL_PROP_SIZE, vs->vs_space, NULL,
+			    scripted, toplevel, format);
+		else
+			print_one_column(ZPOOL_PROP_SIZE, vs->vs_pspace, NULL,
+			    scripted, B_TRUE, format);
 		print_one_column(ZPOOL_PROP_ALLOCATED, vs->vs_alloc, NULL,
 		    scripted, toplevel, format);
 		print_one_column(ZPOOL_PROP_FREE, vs->vs_space - vs->vs_alloc,

include/sys/fs/zfs.h

@@ -1184,6 +1184,7 @@ typedef struct vdev_stat {
 	uint64_t	vs_logical_ashift;	/* vdev_logical_ashift  */
 	uint64_t	vs_physical_ashift;	/* vdev_physical_ashift */
 	uint64_t	vs_noalloc;		/* allocations halted?	*/
+	uint64_t	vs_pspace;		/* physical capacity */
 } vdev_stat_t;
 
 #define	VDEV_STAT_VALID(field, uint64_t_field_count) \

module/zfs/vdev.c

@@ -4424,6 +4424,7 @@ vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx)
 		vs->vs_rsize = vdev_get_min_asize(vd);
 
 		if (vd->vdev_ops->vdev_op_leaf) {
+			vs->vs_pspace = vd->vdev_psize;
 			vs->vs_rsize += VDEV_LABEL_START_SIZE +
 			    VDEV_LABEL_END_SIZE;
 			/*