Move spa_stats.c to common code

Initially it was considered simplest to stub out all
of the functions on FreeBSD. Now that FreeBSD supports
KSTAT_TYPE_RAW at least some of the functionality should
be made available.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10842

module/os/freebsd/zfs/spa_stats.c

@@ -1,114 +0,0 @@
-/*
- * Copyright (c) 2020 iXsystems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/zfs_context.h>
-#include <sys/spa_impl.h>
-#include <sys/vdev_impl.h>
-#include <sys/spa.h>
-#include <zfs_comutil.h>
-
-void
-spa_stats_init(spa_t *spa)
-{
-
-}
-
-void
-spa_stats_destroy(spa_t *spa)
-{
-
-}
-
-void
-spa_iostats_trim_add(spa_t *spa, trim_type_t type,
-    uint64_t extents_written, uint64_t bytes_written,
-    uint64_t extents_skipped, uint64_t bytes_skipped,
-    uint64_t extents_failed, uint64_t bytes_failed)
-{
-}
-
-void
-spa_read_history_add(spa_t *spa, const zbookmark_phys_t *zb, uint32_t aflags)
-{
-}
-
-void
-spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time)
-{
-
-}
-/*
- * Set txg state completion time and increment current state.
- */
-int
-spa_txg_history_set(spa_t *spa, uint64_t txg, txg_state_t completed_state,
-    hrtime_t completed_time)
-{
-	return (0);
-}
-
-txg_stat_t *
-spa_txg_history_init_io(spa_t *spa, uint64_t txg, dsl_pool_t *dp)
-{
-	return (NULL);
-}
-
-void
-spa_txg_history_fini_io(spa_t *spa, txg_stat_t *ts)
-{
-
-}
-
-void
-spa_tx_assign_add_nsecs(spa_t *spa, uint64_t nsecs)
-{
-
-}
-
-void
-spa_mmp_history_add(spa_t *spa, uint64_t txg, uint64_t timestamp,
-    uint64_t mmp_delay, vdev_t *vd, int label, uint64_t mmp_node_id,
-    int error)
-{
-
-}
-
-int
-spa_mmp_history_set(spa_t *spa, uint64_t mmp_node_id, int io_error,
-    hrtime_t duration)
-{
-	return (0);
-}
-
-int
-spa_mmp_history_set_skip(spa_t *spa, uint64_t mmp_node_id)
-{
-	return (0);
-}

module/os/linux/zfs/Makefile.in

@@ -14,7 +14,6 @@ $(MODULE)-objs += ../os/linux/zfs/qat.o
 $(MODULE)-objs += ../os/linux/zfs/qat_compress.o
 $(MODULE)-objs += ../os/linux/zfs/qat_crypt.o
 $(MODULE)-objs += ../os/linux/zfs/spa_misc_os.o
-$(MODULE)-objs += ../os/linux/zfs/spa_stats.o
 $(MODULE)-objs += ../os/linux/zfs/vdev_disk.o
 $(MODULE)-objs += ../os/linux/zfs/vdev_file.o
 $(MODULE)-objs += ../os/linux/zfs/zfs_acl.o

module/zfs/Makefile.in

@@ -76,6 +76,7 @@ $(MODULE)-objs += spa_errlog.o
 $(MODULE)-objs += spa_history.o
 $(MODULE)-objs += spa_log_spacemap.o
 $(MODULE)-objs += spa_misc.o
+$(MODULE)-objs += spa_stats.o
 $(MODULE)-objs += space_map.o
 $(MODULE)-objs += space_reftree.o
 $(MODULE)-objs += txg.o