Fixes to get bits running on Linux:

include/sys/zfs_sysfs.h

@@ -39,6 +39,7 @@ boolean_t zfs_mod_supported(const char *, const char *);
 #endif
 
 #define	ZFS_SYSFS_POOL_PROPERTIES	"properties.pool"
+#define	ZFS_SYSFS_VDEV_PROPERTIES	"properties.vdev"
 #define	ZFS_SYSFS_DATASET_PROPERTIES	"properties.dataset"
 #define	ZFS_SYSFS_KERNEL_FEATURES	"features.kernel"
 #define	ZFS_SYSFS_POOL_FEATURES		"features.pool"

lib/libzfs/libzfs_pool.c

@@ -996,7 +996,8 @@ vdev_expand_proplist(zpool_handle_t *zhp, const char *vdevname,
 			propname = nvpair_name(elem);
 
 			/* Skip properties that are not user defined */
-			if ((prop = vdev_name_to_prop(propname)) != ZPROP_INVAL)
+			if ((prop = vdev_name_to_prop(propname)) !=
+			    (vdev_prop_t)ZPROP_INVAL)
 				continue;
 
 			if (nvpair_value_nvlist(elem, &propval) != 0)

module/os/linux/zfs/zfs_sysfs.c

@@ -90,6 +90,7 @@ struct zfs_mod_kobj {
 static zfs_mod_kobj_t kernel_features_kobj;
 static zfs_mod_kobj_t pool_features_kobj;
 static zfs_mod_kobj_t dataset_props_kobj;
+static zfs_mod_kobj_t vdev_props_kobj;
 static zfs_mod_kobj_t pool_props_kobj;
 
 /*
@@ -333,6 +334,20 @@ dataset_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
 	return (len);
 }
 
+static ssize_t
+vdev_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+	vdev_prop_t prop = vdev_name_to_prop(kobject_name(kobj));
+	zprop_desc_t *prop_tbl = vdev_prop_get_table();
+	ssize_t len;
+
+	ASSERT3U(prop, <, VDEV_NUM_PROPS);
+
+	len = zprop_sysfs_show(attr->name, &prop_tbl[prop], buf, PAGE_SIZE);
+
+	return (len);
+}
+
 static ssize_t
 pool_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
 {
@@ -577,6 +592,14 @@ zfs_sysfs_properties_init(zfs_mod_kobj_t *zfs_kobj, struct kobject *parent,
 		context.p2k_show_func = pool_property_show;
 		err = zfs_kobj_init(zfs_kobj, 0, ZPOOL_NUM_PROPS,
 		    pool_property_show);
+	} else if (type == ZFS_TYPE_VDEV) {
+		name = ZFS_SYSFS_VDEV_PROPERTIES;
+		context.p2k_table = vdev_prop_get_table();
+		context.p2k_attr_count = ZPOOL_PROP_ATTR_COUNT;
+		context.p2k_parent = zfs_kobj;
+		context.p2k_show_func = vdev_property_show;
+		err = zfs_kobj_init(zfs_kobj, 0, VDEV_NUM_PROPS,
+		    vdev_property_show);
 	} else {
 		name = ZFS_SYSFS_DATASET_PROPERTIES;
 		context.p2k_table = zfs_prop_get_table();
@@ -639,12 +662,22 @@ zfs_sysfs_init(void)
 		return;
 	}
 
+	err = zfs_sysfs_properties_init(&vdev_props_kobj, parent,
+	    ZFS_TYPE_VDEV);
+	if (err) {
+		zfs_kobj_fini(&kernel_features_kobj);
+		zfs_kobj_fini(&pool_features_kobj);
+		zfs_kobj_fini(&pool_props_kobj);
+		return;
+	}
+
 	err = zfs_sysfs_properties_init(&dataset_props_kobj, parent,
 	    ZFS_TYPE_FILESYSTEM);
 	if (err) {
 		zfs_kobj_fini(&kernel_features_kobj);
 		zfs_kobj_fini(&pool_features_kobj);
 		zfs_kobj_fini(&pool_props_kobj);
+		zfs_kobj_fini(&vdev_props_kobj);
 		return;
 	}
 }

module/zcommon/zprop_common.c

@@ -85,7 +85,8 @@ zfs_mod_supported_prop(const char *name, zfs_type_t type)
 	return (B_TRUE);
 #else
 	return (zfs_mod_supported(type == ZFS_TYPE_POOL ?
-	    ZFS_SYSFS_POOL_PROPERTIES : ZFS_SYSFS_DATASET_PROPERTIES, name));
+	    ZFS_SYSFS_POOL_PROPERTIES : (type == ZFS_TYPE_VDEV ?
+	    ZFS_SYSFS_VDEV_PROPERTIES : ZFS_SYSFS_DATASET_PROPERTIES), name));
 #endif
 }
 

module/zfs/vdev.c

@@ -5346,26 +5346,19 @@ vdev_xlate_walk(vdev_t *vd, const range_seg64_t *logical_rs,
 }
 
 static char *
-vdev_name(vdev_t *vd)
+vdev_name(vdev_t *vd, char *buf, int buflen)
 {
-	char *ret;
-
-	ret = vd->vdev_path;
-	if (ret == NULL) {
+	if (vd->vdev_path == NULL) {
 		if (strcmp(vd->vdev_ops->vdev_op_type, "root") == 0) {
-			ret = vd->vdev_spa->spa_name;
+			return (vd->vdev_spa->spa_name);
 		} else if (!vd->vdev_ops->vdev_op_leaf) {
-			char namestr[64] = { 0 };
-
-			snprintf((char *)&namestr,
-			    sizeof (namestr), "%s-%llu",
+			snprintf(buf, buflen, "%s-%llu",
 			    vd->vdev_ops->vdev_op_type,
 			    (u_longlong_t)vd->vdev_id);
-			ret = (char *)&namestr;
+			return (buf);
 		}
 	}
-
-	return (ret);
+	return (vd->vdev_path);
 }
 
 /*
@@ -5633,6 +5626,8 @@ vdev_prop_get(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl)
 	mutex_enter(&spa->spa_props_lock);
 
 	if (nvprops != NULL) {
+		char namebuf[64] = { 0 };
+
 		while ((elem = nvlist_next_nvpair(nvprops, elem)) != NULL) {
 			intval = 0;
 			strval = NULL;
@@ -5643,7 +5638,7 @@ vdev_prop_get(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl)
 			switch (prop) {
 			/* Special Read-only Properties */
 			case VDEV_PROP_NAME:
-				strval = vdev_name(vd);
+				strval = vdev_name(vd, namebuf, 64);
 				if (strval == NULL)
 					continue;
 				vdev_prop_add_list(outnvl, propname, strval, 0,
@@ -5743,7 +5738,8 @@ vdev_prop_get(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl)
 				continue;
 			case VDEV_PROP_PARENT:
 				if (vd->vdev_parent != NULL) {
-					strval = vdev_name(vd->vdev_parent);
+					strval = vdev_name(vd->vdev_parent,
+					    namebuf, 64);
 					vdev_prop_add_list(outnvl, propname,
 					    strval, 0, ZPROP_SRC_NONE);
 				}
@@ -5756,7 +5752,8 @@ vdev_prop_get(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl)
 				    i++) {
 					char *vname;
 
-					vname = vdev_name(vd->vdev_child[i]);
+					vname = vdev_name(vd->vdev_child[i],
+					    namebuf, 64);
 					if (vname == NULL)
 						vname = "(unknown)";
 					if (strlen(strval) > 0)