Refactor dnode dirty context from dbuf_dirty

* Add dedicated donde_set_dirtyctx routine.
* Add empty dirty record on destroy assertion.
* Make much more extensive use of the SET_ERROR macro.

Reviewed-by: Will Andrews <wca@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9924

include/sys/dnode.h

@@ -333,7 +333,7 @@ struct dnode {
 	uint64_t dn_dirty_txg;			/* txg dnode was last dirtied */
 	kcondvar_t dn_notxholds;
 	enum dnode_dirtycontext dn_dirtyctx;
-	uint8_t *dn_dirtyctx_firstset;		/* dbg: contents meaningless */
+	void *dn_dirtyctx_firstset;		/* dbg: contents meaningless */
 
 	/* protected by own devices */
 	zfs_refcount_t dn_tx_holds;
@@ -425,6 +425,7 @@ void dnode_rele(dnode_t *dn, void *ref);
 void dnode_rele_and_unlock(dnode_t *dn, void *tag, boolean_t evicting);
 int dnode_try_claim(objset_t *os, uint64_t object, int slots);
 void dnode_setdirty(dnode_t *dn, dmu_tx_t *tx);
+void dnode_set_dirtyctx(dnode_t *dn, dmu_tx_t *tx, void *tag);
 void dnode_sync(dnode_t *dn, dmu_tx_t *tx);
 void dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs,
     dmu_object_type_t bonustype, int bonuslen, int dn_slots, dmu_tx_t *tx);

module/os/linux/zfs/zfs_vfsops.c

@@ -990,7 +990,7 @@ zfs_check_global_label(const char *dsname, const char *hexsl)
 		if (dsl_prop_get_integer(dsname,
 		    zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL))
 			return (SET_ERROR(EACCES));
-		return (rdonly ? 0 : EACCES);
+		return (rdonly ? 0 : SET_ERROR(EACCES));
 	}
 	return (SET_ERROR(EACCES));
 }

module/zfs/dbuf.c

@@ -1681,8 +1681,8 @@ dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
 		DBUF_STAT_BUMP(hash_misses);
 
 		/* Skip the wait per the caller's request. */
-		mutex_enter(&db->db_mtx);
 		if ((flags & DB_RF_NEVERWAIT) == 0) {
+			mutex_enter(&db->db_mtx);
 			while (db->db_state == DB_READ ||
 			    db->db_state == DB_FILL) {
 				ASSERT(db->db_state == DB_READ ||
@@ -1693,8 +1693,8 @@ dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
 			}
 			if (db->db_state == DB_UNCACHED)
 				err = SET_ERROR(EIO);
+			mutex_exit(&db->db_mtx);
 		}
-		mutex_exit(&db->db_mtx);
 	}
 
 	return (err);
@@ -1872,7 +1872,7 @@ dbuf_free_range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
 void
 dbuf_new_size(dmu_buf_impl_t *db, int size, dmu_tx_t *tx)
 {
-	arc_buf_t *buf, *obuf;
+	arc_buf_t *buf, *old_buf;
 	dbuf_dirty_record_t *dr;
 	int osize = db->db.db_size;
 	arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
@@ -1893,15 +1893,15 @@ dbuf_new_size(dmu_buf_impl_t *db, int size, dmu_tx_t *tx)
 	buf = arc_alloc_buf(dn->dn_objset->os_spa, db, type, size);
 
 	/* copy old block data to the new block */
-	obuf = db->db_buf;
+	old_buf = db->db_buf;
-	bcopy(obuf->b_data, buf->b_data, MIN(osize, size));
+	bcopy(old_buf->b_data, buf->b_data, MIN(osize, size));
 	/* zero the remainder */
 	if (size > osize)
 		bzero((uint8_t *)buf->b_data + osize, size - osize);
 
 	mutex_enter(&db->db_mtx);
 	dbuf_set_data(db, buf);
-	arc_buf_destroy(obuf, db);
+	arc_buf_destroy(old_buf, db);
 	db->db.db_size = size;
 
 	dr = list_head(&db->db_dirty_records);
@@ -2009,27 +2009,7 @@ dbuf_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
 	    db->db_state == DB_NOFILL);
 
 	mutex_enter(&dn->dn_mtx);
-	/*
+	dnode_set_dirtyctx(dn, tx, db);
-	 * Don't set dirtyctx to SYNC if we're just modifying this as we
-	 * initialize the objset.
-	 */
-	if (dn->dn_dirtyctx == DN_UNDIRTIED) {
-		if (dn->dn_objset->os_dsl_dataset != NULL) {
-			rrw_enter(&dn->dn_objset->os_dsl_dataset->ds_bp_rwlock,
-			    RW_READER, FTAG);
-		}
-		if (!BP_IS_HOLE(dn->dn_objset->os_rootbp)) {
-			dn->dn_dirtyctx = (dmu_tx_is_syncing(tx) ?
-			    DN_DIRTY_SYNC : DN_DIRTY_OPEN);
-			ASSERT(dn->dn_dirtyctx_firstset == NULL);
-			dn->dn_dirtyctx_firstset = kmem_alloc(1, KM_SLEEP);
-		}
-		if (dn->dn_objset->os_dsl_dataset != NULL) {
-			rrw_exit(&dn->dn_objset->os_dsl_dataset->ds_bp_rwlock,
-			    FTAG);
-		}
-	}
-
 	if (tx->tx_txg > dn->dn_dirty_txg)
 		dn->dn_dirty_txg = tx->tx_txg;
 	mutex_exit(&dn->dn_mtx);
@@ -2715,6 +2695,7 @@ dbuf_destroy(dmu_buf_impl_t *db)
 
 	ASSERT(db->db_state == DB_UNCACHED || db->db_state == DB_NOFILL);
 	ASSERT(db->db_data_pending == NULL);
+	ASSERT(list_is_empty(&db->db_dirty_records));
 
 	db->db_state = DB_EVICTING;
 	DTRACE_SET_STATE(db, "buffer eviction started");
@@ -4603,7 +4584,7 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 	uint64_t txg = tx->tx_txg;
 	zbookmark_phys_t zb;
 	zio_prop_t zp;
-	zio_t *zio;
+	zio_t *pio; /* parent I/O */
 	int wp_flag = 0;
 
 	ASSERT(dmu_tx_is_syncing(tx));
@@ -4640,7 +4621,7 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 		 * our block pointer, so the parent must be released.
 		 */
 		ASSERT(arc_released(parent->db_buf));
-		zio = parent->db_data_pending->dr_zio;
+		pio = parent->db_data_pending->dr_zio;
 	} else {
 		/* Our parent is the dnode itself. */
 		ASSERT((db->db_level == dn->dn_phys->dn_nlevels-1 &&
@@ -4649,12 +4630,12 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 		if (db->db_blkid != DMU_SPILL_BLKID)
 			ASSERT3P(db->db_blkptr, ==,
 			    &dn->dn_phys->dn_blkptr[db->db_blkid]);
-		zio = dn->dn_zio;
+		pio = dn->dn_zio;
 	}
 
 	ASSERT(db->db_level == 0 || data == db->db_buf);
 	ASSERT3U(db->db_blkptr->blk_birth, <=, txg);
-	ASSERT(zio);
+	ASSERT(pio);
 
 	SET_BOOKMARK(&zb, os->os_dsl_dataset ?
 	    os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
@@ -4684,9 +4665,9 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 		abd_t *contents = (data != NULL) ?
 		    abd_get_from_buf(data->b_data, arc_buf_size(data)) : NULL;
 
-		dr->dr_zio = zio_write(zio, os->os_spa, txg,
+		dr->dr_zio = zio_write(pio, os->os_spa, txg, &dr->dr_bp_copy,
-		    &dr->dr_bp_copy, contents, db->db.db_size, db->db.db_size,
+		    contents, db->db.db_size, db->db.db_size, &zp,
-		    &zp, dbuf_write_override_ready, NULL, NULL,
+		    dbuf_write_override_ready, NULL, NULL,
 		    dbuf_write_override_done,
 		    dr, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
 		mutex_enter(&db->db_mtx);
@@ -4697,7 +4678,7 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 	} else if (db->db_state == DB_NOFILL) {
 		ASSERT(zp.zp_checksum == ZIO_CHECKSUM_OFF ||
 		    zp.zp_checksum == ZIO_CHECKSUM_NOPARITY);
-		dr->dr_zio = zio_write(zio, os->os_spa, txg,
+		dr->dr_zio = zio_write(pio, os->os_spa, txg,
 		    &dr->dr_bp_copy, NULL, db->db.db_size, db->db.db_size, &zp,
 		    dbuf_write_nofill_ready, NULL, NULL,
 		    dbuf_write_nofill_done, db,
@@ -4715,7 +4696,7 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 		if (db->db_level != 0)
 			children_ready_cb = dbuf_write_children_ready;
 
-		dr->dr_zio = arc_write(zio, os->os_spa, txg,
+		dr->dr_zio = arc_write(pio, os->os_spa, txg,
 		    &dr->dr_bp_copy, data, DBUF_IS_L2CACHEABLE(db),
 		    &zp, dbuf_write_ready,
 		    children_ready_cb, dbuf_write_physdone,

module/zfs/ddt_zap.c

@@ -46,7 +46,7 @@ ddt_zap_create(objset_t *os, uint64_t *objectp, dmu_tx_t *tx, boolean_t prehash)
 	    ddt_zap_leaf_blockshift, ddt_zap_indirect_blockshift,
 	    DMU_OT_NONE, 0, tx);
 
-	return (*objectp == 0 ? ENOTSUP : 0);
+	return (*objectp == 0 ? SET_ERROR(ENOTSUP) : 0);
 }
 
 static int

module/zfs/dmu_send.c

@@ -2464,7 +2464,7 @@ dmu_send_impl(struct dmu_send_params *dspp)
 		err = do_dump(&dsc, range);
 		range = get_next_range(&spt_arg->q, range);
 		if (issig(JUSTLOOKING) && issig(FORREAL))
-			err = EINTR;
+			err = SET_ERROR(EINTR);
 	}
 
 	/*

module/zfs/dmu_tx.c

@@ -1183,7 +1183,7 @@ dmu_tx_abort(dmu_tx_t *tx)
 	 * Call any registered callbacks with an error code.
 	 */
 	if (!list_is_empty(&tx->tx_callbacks))
-		dmu_tx_do_callbacks(&tx->tx_callbacks, ECANCELED);
+		dmu_tx_do_callbacks(&tx->tx_callbacks, SET_ERROR(ECANCELED));
 
 	dmu_tx_destroy(tx);
 }

module/zfs/dnode.c

@@ -541,10 +541,7 @@ dnode_destroy(dnode_t *dn)
 	dn->dn_dirty_txg = 0;
 
 	dn->dn_dirtyctx = 0;
-	if (dn->dn_dirtyctx_firstset != NULL) {
+	dn->dn_dirtyctx_firstset = NULL;
-		kmem_free(dn->dn_dirtyctx_firstset, 1);
-		dn->dn_dirtyctx_firstset = NULL;
-	}
 	if (dn->dn_bonus != NULL) {
 		mutex_enter(&dn->dn_bonus->db_mtx);
 		dbuf_destroy(dn->dn_bonus);
@@ -649,10 +646,7 @@ dnode_allocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, int ibs,
 	dn->dn_dirtyctx = 0;
 
 	dn->dn_free_txg = 0;
-	if (dn->dn_dirtyctx_firstset) {
+	dn->dn_dirtyctx_firstset = NULL;
-		kmem_free(dn->dn_dirtyctx_firstset, 1);
-		dn->dn_dirtyctx_firstset = NULL;
-	}
 
 	dn->dn_allocated_txg = tx->tx_txg;
 	dn->dn_id_flags = 0;
@@ -2007,6 +2001,32 @@ dnode_dirty_l1range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
 	mutex_exit(&dn->dn_dbufs_mtx);
 }
 
+void
+dnode_set_dirtyctx(dnode_t *dn, dmu_tx_t *tx, void *tag)
+{
+	/*
+	 * Don't set dirtyctx to SYNC if we're just modifying this as we
+	 * initialize the objset.
+	 */
+	if (dn->dn_dirtyctx == DN_UNDIRTIED) {
+		dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
+
+		if (ds != NULL) {
+			rrw_enter(&ds->ds_bp_rwlock, RW_READER, tag);
+		}
+		if (!BP_IS_HOLE(dn->dn_objset->os_rootbp)) {
+			if (dmu_tx_is_syncing(tx))
+				dn->dn_dirtyctx = DN_DIRTY_SYNC;
+			else
+				dn->dn_dirtyctx = DN_DIRTY_OPEN;
+			dn->dn_dirtyctx_firstset = tag;
+		}
+		if (ds != NULL) {
+			rrw_exit(&ds->ds_bp_rwlock, tag);
+		}
+	}
+}
+
 void
 dnode_free_range(dnode_t *dn, uint64_t off, uint64_t len, dmu_tx_t *tx)
 {

module/zfs/dsl_bookmark.c

@@ -88,7 +88,7 @@ dsl_bookmark_lookup_impl(dsl_dataset_t *ds, const char *shortname,
 	    sizeof (*bmark_phys) / sizeof (uint64_t), bmark_phys, mt, NULL, 0,
 	    NULL);
 
-	return (err == ENOENT ? ESRCH : err);
+	return (err == ENOENT ? SET_ERROR(ESRCH) : err);
 }
 
 /*

module/zfs/dsl_dataset.c

@@ -2286,7 +2286,7 @@ get_clones_stat_impl(dsl_dataset_t *ds, nvlist_t *val)
 		    &count));
 	}
 	if (count != dsl_dataset_phys(ds)->ds_num_children - 1) {
-		return (ENOENT);
+		return (SET_ERROR(ENOENT));
 	}
 	for (zap_cursor_init(&zc, mos,
 	    dsl_dataset_phys(ds)->ds_next_clones_obj);
@@ -2660,7 +2660,7 @@ dsl_get_prev_snap(dsl_dataset_t *ds, char *snap)
 		dsl_dataset_name(ds->ds_prev, snap);
 		return (0);
 	} else {
-		return (ENOENT);
+		return (SET_ERROR(ENOENT));
 	}
 }
 

module/zfs/dsl_dir.c

@@ -1058,7 +1058,7 @@ dsl_dir_get_filesystem_count(dsl_dir_t *dd, uint64_t *count)
 		return (zap_lookup(os, dd->dd_object, DD_FIELD_FILESYSTEM_COUNT,
 		    sizeof (*count), 1, count));
 	} else {
-		return (ENOENT);
+		return (SET_ERROR(ENOENT));
 	}
 }
 
@@ -1070,7 +1070,7 @@ dsl_dir_get_snapshot_count(dsl_dir_t *dd, uint64_t *count)
 		return (zap_lookup(os, dd->dd_object, DD_FIELD_SNAPSHOT_COUNT,
 		    sizeof (*count), 1, count));
 	} else {
-		return (ENOENT);
+		return (SET_ERROR(ENOENT));
 	}
 }
 
@@ -1315,7 +1315,7 @@ top_of_function:
 
 		if (avail < quota) {
 			quota = avail;
-			retval = ENOSPC;
+			retval = SET_ERROR(ENOSPC);
 		}
 	}
 

module/zfs/dsl_prop.c

@@ -73,7 +73,7 @@ int
 dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
     int intsz, int numints, void *buf, char *setpoint, boolean_t snapshot)
 {
-	int err = ENOENT;
+	int err;
 	dsl_dir_t *target = dd;
 	objset_t *mos = dd->dd_pool->dp_meta_objset;
 	zfs_prop_t prop;
@@ -98,8 +98,10 @@ dsl_prop_get_dd(dsl_dir_t *dd, const char *propname,
 	 */
 	for (; dd != NULL; dd = dd->dd_parent) {
 		if (dd != target || snapshot) {
-			if (!inheritable)
+			if (!inheritable) {
+				err = SET_ERROR(ENOENT);
 				break;
+			}
 			inheriting = B_TRUE;
 		}
 

module/zfs/dsl_scan.c

@@ -807,7 +807,7 @@ dsl_scan(dsl_pool_t *dp, pool_scan_func_t func)
 		    POOL_SCRUB_NORMAL);
 		if (err == 0) {
 			spa_event_notify(spa, NULL, NULL, ESC_ZFS_SCRUB_RESUME);
-			return (ECANCELED);
+			return (SET_ERROR(ECANCELED));
 		}
 
 		return (SET_ERROR(err));

module/zfs/spa_checkpoint.c

@@ -212,7 +212,7 @@ spa_checkpoint_discard_sync_callback(space_map_entry_t *sme, void *arg)
 	uint64_t end = sme->sme_offset + sme->sme_run;
 
 	if (sdc->sdc_entry_limit == 0)
-		return (EINTR);
+		return (SET_ERROR(EINTR));
 
 	/*
 	 * Since the space map is not condensed, we know that

module/zfs/vdev.c

@@ -1702,7 +1702,7 @@ vdev_open(vdev_t *vd)
 	 */
 	vd->vdev_reopening = B_FALSE;
 	if (zio_injection_enabled && error == 0)
-		error = zio_handle_device_injection(vd, NULL, ENXIO);
+		error = zio_handle_device_injection(vd, NULL, SET_ERROR(ENXIO));
 
 	if (error) {
 		if (vd->vdev_removed &&
@@ -2306,7 +2306,7 @@ vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing)
 
 	if (error || vd->vdev_state != VDEV_STATE_HEALTHY) {
 		vdev_close(vd);
-		return (error ? error : ENXIO);
+		return (error ? error : SET_ERROR(ENXIO));
 	}
 
 	/*
@@ -2929,8 +2929,10 @@ vdev_dtl_required(vdev_t *vd)
 	vd->vdev_cant_read = cant_read;
 	vdev_dtl_reassess(tvd, 0, 0, B_FALSE);
 
-	if (!required && zio_injection_enabled)
+	if (!required && zio_injection_enabled) {
-		required = !!zio_handle_device_injection(vd, NULL, ECHILD);
+		required = !!zio_handle_device_injection(vd, NULL,
+		    SET_ERROR(ECHILD));
+	}
 
 	return (required);
 }
@@ -3333,10 +3335,10 @@ vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux)
 	spa_vdev_state_enter(spa, SCL_NONE);
 
 	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
-		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
 
 	if (!vd->vdev_ops->vdev_op_leaf)
-		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
 
 	tvd = vd->vdev_top;
 
@@ -3415,10 +3417,10 @@ vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux)
 	spa_vdev_state_enter(spa, SCL_NONE);
 
 	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
-		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
 
 	if (!vd->vdev_ops->vdev_op_leaf)
-		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
 
 	/*
 	 * If the vdev is already faulted, then don't do anything.
@@ -3452,10 +3454,10 @@ vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate)
 	spa_vdev_state_enter(spa, SCL_NONE);
 
 	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
-		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
 
 	if (!vd->vdev_ops->vdev_op_leaf)
-		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
 
 	wasoffline = (vd->vdev_offline || vd->vdev_tmpoffline);
 	oldstate = vd->vdev_state;
@@ -3537,10 +3539,10 @@ top:
 	spa_vdev_state_enter(spa, SCL_ALLOC);
 
 	if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
-		return (spa_vdev_state_exit(spa, NULL, ENODEV));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
 
 	if (!vd->vdev_ops->vdev_op_leaf)
-		return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
+		return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
 
 	tvd = vd->vdev_top;
 	mg = tvd->vdev_mg;
@@ -3557,7 +3559,8 @@ top:
 		 */
 		if (!tvd->vdev_islog && vd->vdev_aux == NULL &&
 		    vdev_dtl_required(vd))
-			return (spa_vdev_state_exit(spa, NULL, EBUSY));
+			return (spa_vdev_state_exit(spa, NULL,
+			    SET_ERROR(EBUSY)));
 
 		/*
 		 * If the top-level is a slog and it has had allocations
@@ -3614,7 +3617,8 @@ top:
 		    vdev_is_dead(tvd)) {
 			vd->vdev_offline = B_FALSE;
 			vdev_reopen(tvd);
-			return (spa_vdev_state_exit(spa, NULL, EBUSY));
+			return (spa_vdev_state_exit(spa, NULL,
+			    SET_ERROR(EBUSY)));
 		}
 
 		/*

module/zfs/zap_leaf.c

@@ -467,7 +467,7 @@ zap_leaf_lookup_closest(zap_leaf_t *l,
 		}
 	}
 
-	return (bestcd == -1U ? ENOENT : 0);
+	return (bestcd == -1U ? SET_ERROR(ENOENT) : 0);
 }
 
 int

module/zfs/zcp.c

@@ -396,7 +396,7 @@ zcp_lua_to_nvlist_impl(lua_State *state, int index, nvlist_t *nvl,
 	case LUA_TTABLE: {
 		nvlist_t *value_nvl = zcp_table_to_nvlist(state, index, depth);
 		if (value_nvl == NULL)
-			return (EINVAL);
+			return (SET_ERROR(EINVAL));
 
 		fnvlist_add_nvlist(nvl, key, value_nvl);
 		fnvlist_free(value_nvl);
@@ -406,7 +406,7 @@ zcp_lua_to_nvlist_impl(lua_State *state, int index, nvlist_t *nvl,
 		(void) lua_pushfstring(state,
 		    "Invalid value type '%s' for key '%s'",
 		    lua_typename(state, lua_type(state, index)), key);
-		return (EINVAL);
+		return (SET_ERROR(EINVAL));
 	}
 
 	return (0);
@@ -585,7 +585,7 @@ zcp_nvpair_value_to_lua(lua_State *state, nvpair_t *pair,
 			    "Unhandled nvpair type %d for key '%s'",
 			    nvpair_type(pair), nvpair_name(pair));
 		}
-		return (EINVAL);
+		return (SET_ERROR(EINVAL));
 	}
 	}
 	return (err);

module/zfs/zcp_get.c

@@ -207,7 +207,7 @@ get_dsl_dir_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop,
 		break;
 	default:
 		mutex_exit(&dd->dd_lock);
-		return (ENOENT);
+		return (SET_ERROR(ENOENT));
 	}
 	mutex_exit(&dd->dd_lock);
 	return (0);
@@ -669,7 +669,7 @@ zcp_get_userquota_prop(lua_State *state, dsl_pool_t *dp,
 
 	if ((value == 0) && ((type == ZFS_PROP_USERQUOTA) ||
 	    (type == ZFS_PROP_GROUPQUOTA)))
-		error = ENOENT;
+		error = SET_ERROR(ENOENT);
 	if (error != 0) {
 		return (zcp_handle_error(state, dataset_name,
 		    prop_name, error));

module/zfs/zcp_synctask.c

@@ -259,7 +259,7 @@ zcp_synctask_snapshot(lua_State *state, boolean_t sync, nvlist_t *err_details)
 	 * context.
 	 */
 	if (spa_version(ri->zri_pool->dp_spa) < SPA_VERSION_FAST_SNAP) {
-		return (ENOTSUP);
+		return (SET_ERROR(ENOTSUP));
 	}
 
 	/*

module/zfs/zfs_ioctl.c

@@ -2292,7 +2292,7 @@ zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
 
 	error = dmu_objset_hold(zc->zc_name, FTAG, &os);
 	if (error != 0) {
-		return (error == ENOENT ? ESRCH : error);
+		return (error == ENOENT ? SET_ERROR(ESRCH) : error);
 	}
 
 	/*
@@ -5530,9 +5530,10 @@ zfs_ioc_clear(zfs_cmd_t *zc)
 	} else {
 		vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
 		if (vd == NULL) {
-			(void) spa_vdev_state_exit(spa, NULL, ENODEV);
+			error = SET_ERROR(ENODEV);
+			(void) spa_vdev_state_exit(spa, NULL, error);
 			spa_close(spa, FTAG);
-			return (SET_ERROR(ENODEV));
+			return (error);
 		}
 	}