Add linux kernel module support

Setup linux kernel module support, this includes:
- zfs context for kernel/user
- kernel module build system integration
- kernel module macros
- kernel module symbol export
- kernel module options

Signed-off-by: Brian Behlendorf <[email protected]>

27 files changed, 462 insertions, 10 deletions

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index f1d51805b..f8dfee2cc 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -174,9 +174,9 @@ static boolean_t arc_warm;
 /*
  * These tunables are for performance analysis.
  */
-uint64_t zfs_arc_max;
-uint64_t zfs_arc_min;
-uint64_t zfs_arc_meta_limit = 0;
+unsigned long zfs_arc_max = 0;
+unsigned long zfs_arc_min = 0;
+unsigned long zfs_arc_meta_limit = 0;
 int zfs_arc_grow_retry = 0;
 int zfs_arc_shrink_shift = 0;
 int zfs_arc_p_min_shift = 0;
@@ -4680,3 +4680,18 @@ l2arc_stop(void)
 		cv_wait(&l2arc_feed_thr_cv, &l2arc_feed_thr_lock);
 	mutex_exit(&l2arc_feed_thr_lock);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(arc_read);
+EXPORT_SYMBOL(arc_buf_remove_ref);
+EXPORT_SYMBOL(arc_getbuf_func);
+
+module_param(zfs_arc_min, ulong, 0644);
+MODULE_PARM_DESC(zfs_arc_min, "Minimum arc size");
+
+module_param(zfs_arc_max, ulong, 0644);
+MODULE_PARM_DESC(zfs_arc_max, "Maximum arc size");
+
+module_param(zfs_arc_meta_limit, ulong, 0644);
+MODULE_PARM_DESC(zfs_arc_meta_limit, "Meta limit for arc size");
+#endif
diff --git a/module/zfs/dbuf.c b/module/zfs/dbuf.c
index fb7d0ac86..1ebac4ee6 100644
--- a/module/zfs/dbuf.c
+++ b/module/zfs/dbuf.c
@@ -23,6 +23,7 @@
  */
 
 #include <sys/zfs_context.h>
+#include <sys/arc.h>
 #include <sys/dmu.h>
 #include <sys/dmu_impl.h>
 #include <sys/dbuf.h>
@@ -2816,3 +2817,8 @@ dbuf_write(dbuf_dirty_record_t *dr, arc_buf_t *data, dmu_tx_t *tx)
 		    ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
 	}
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_buf_rele);
+EXPORT_SYMBOL(dmu_buf_will_dirty);
+#endif
diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c
index fea9cd502..aaeec418d 100644
--- a/module/zfs/dmu.c
+++ b/module/zfs/dmu.c
@@ -1829,3 +1829,22 @@ dmu_fini(void)
 	sa_cache_fini();
 	zfs_dbgmsg_fini();
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_bonus_hold);
+EXPORT_SYMBOL(dmu_free_range);
+EXPORT_SYMBOL(dmu_read);
+EXPORT_SYMBOL(dmu_write);
+
+/* Get information on a DMU object. */
+EXPORT_SYMBOL(dmu_object_info);
+EXPORT_SYMBOL(dmu_object_info_from_dnode);
+EXPORT_SYMBOL(dmu_object_info_from_db);
+EXPORT_SYMBOL(dmu_object_size_from_db);
+
+EXPORT_SYMBOL(dmu_object_set_blocksize);
+EXPORT_SYMBOL(dmu_object_set_checksum);
+EXPORT_SYMBOL(dmu_object_set_compress);
+
+EXPORT_SYMBOL(dmu_ot);
+#endif
diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c
index 8dff46048..8bb3eb4b0 100644
--- a/module/zfs/dmu_object.c
+++ b/module/zfs/dmu_object.c
@@ -194,3 +194,11 @@ dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
 
 	return (error);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_object_alloc);
+EXPORT_SYMBOL(dmu_object_claim);
+EXPORT_SYMBOL(dmu_object_reclaim);
+EXPORT_SYMBOL(dmu_object_free);
+EXPORT_SYMBOL(dmu_object_next);
+#endif
diff --git a/module/zfs/dmu_objset.c b/module/zfs/dmu_objset.c
index 1dcfb02c5..7da5c1aa0 100644
--- a/module/zfs/dmu_objset.c
+++ b/module/zfs/dmu_objset.c
@@ -910,8 +910,10 @@ dmu_objset_snapshot_one(const char *name, void *arg)
 	 * permission checks for the starting dataset have already been
 	 * performed in zfs_secpolicy_snapshot()
 	 */
+#ifdef HAVE_ZPL
 	if (sn->recursive && (err = zfs_secpolicy_snapshot_perms(name, CRED())))
 		return (err);
+#endif
 
 	err = dmu_objset_hold(name, sn, &os);
 	if (err != 0)
@@ -1796,3 +1798,39 @@ dmu_objset_get_user(objset_t *os)
 	ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
 	return (os->os_user_ptr);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_objset_pool);
+EXPORT_SYMBOL(dmu_objset_name);
+EXPORT_SYMBOL(dmu_objset_hold);
+EXPORT_SYMBOL(dmu_objset_own);
+EXPORT_SYMBOL(dmu_objset_rele);
+EXPORT_SYMBOL(dmu_objset_disown);
+EXPORT_SYMBOL(dmu_objset_from_ds);
+EXPORT_SYMBOL(dmu_objset_create);
+EXPORT_SYMBOL(dmu_objset_clone);
+EXPORT_SYMBOL(dmu_objset_destroy);
+EXPORT_SYMBOL(dmu_objset_snapshot);
+EXPORT_SYMBOL(dmu_objset_stats);
+EXPORT_SYMBOL(dmu_objset_fast_stat);
+EXPORT_SYMBOL(dmu_objset_space);
+EXPORT_SYMBOL(dmu_objset_fsid_guid);
+EXPORT_SYMBOL(dmu_objset_find);
+EXPORT_SYMBOL(dmu_objset_find_spa);
+EXPORT_SYMBOL(dmu_objset_prefetch);
+EXPORT_SYMBOL(dmu_objset_byteswap);
+EXPORT_SYMBOL(dmu_objset_evict_dbufs);
+EXPORT_SYMBOL(dmu_objset_snap_cmtime);
+
+EXPORT_SYMBOL(dmu_objset_sync);
+EXPORT_SYMBOL(dmu_objset_is_dirty);
+EXPORT_SYMBOL(dmu_objset_create_impl);
+EXPORT_SYMBOL(dmu_objset_open_impl);
+EXPORT_SYMBOL(dmu_objset_evict);
+EXPORT_SYMBOL(dmu_objset_register_type);
+EXPORT_SYMBOL(dmu_objset_do_userquota_updates);
+EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
+EXPORT_SYMBOL(dmu_objset_userused_enabled);
+EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
+EXPORT_SYMBOL(dmu_objset_userspace_present);
+#endif
diff --git a/module/zfs/dmu_traverse.c b/module/zfs/dmu_traverse.c
index ee7eb5f8a..775bb8358 100644
--- a/module/zfs/dmu_traverse.c
+++ b/module/zfs/dmu_traverse.c
@@ -567,3 +567,8 @@ traverse_pool(spa_t *spa, uint64_t txg_start, int flags,
 		err = 0;
 	return (err != 0 ? err : lasterr);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(traverse_dataset);
+EXPORT_SYMBOL(traverse_pool);
+#endif
diff --git a/module/zfs/dmu_tx.c b/module/zfs/dmu_tx.c
index 91dc01e91..fa64b3af6 100644
--- a/module/zfs/dmu_tx.c
+++ b/module/zfs/dmu_tx.c
@@ -1381,3 +1381,21 @@ dmu_tx_hold_sa(dmu_tx_t *tx, sa_handle_t *hdl, boolean_t may_grow)
 		DB_DNODE_EXIT(db);
 	}
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_tx_create);
+EXPORT_SYMBOL(dmu_tx_hold_write);
+EXPORT_SYMBOL(dmu_tx_hold_free);
+EXPORT_SYMBOL(dmu_tx_hold_zap);
+EXPORT_SYMBOL(dmu_tx_hold_bonus);
+EXPORT_SYMBOL(dmu_tx_abort);
+EXPORT_SYMBOL(dmu_tx_assign);
+EXPORT_SYMBOL(dmu_tx_wait);
+EXPORT_SYMBOL(dmu_tx_commit);
+EXPORT_SYMBOL(dmu_tx_get_txg);
+EXPORT_SYMBOL(dmu_tx_callback_register);
+EXPORT_SYMBOL(dmu_tx_do_callbacks);
+EXPORT_SYMBOL(dmu_tx_hold_spill);
+EXPORT_SYMBOL(dmu_tx_hold_sa_create);
+EXPORT_SYMBOL(dmu_tx_hold_sa);
+#endif
diff --git a/module/zfs/dmu_zfetch.c b/module/zfs/dmu_zfetch.c
index 4a1b1f4a7..b36c30fc6 100644
--- a/module/zfs/dmu_zfetch.c
+++ b/module/zfs/dmu_zfetch.c
@@ -722,3 +722,9 @@ dmu_zfetch(zfetch_t *zf, uint64_t offset, uint64_t size, int prefetched)
 		}
 	}
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+module_param(zfs_prefetch_disable, int, 0644);
+MODULE_PARM_DESC(zfs_prefetch_disable, "Disable all ZFS prefetching");
+#endif
+
diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c
index 96a8b667f..dfccede04 100644
--- a/module/zfs/dsl_dataset.c
+++ b/module/zfs/dsl_dataset.c
@@ -2364,13 +2364,16 @@ dsl_snapshot_rename_one(const char *name, void *arg)
 	 * For recursive snapshot renames the parent won't be changing
 	 * so we just pass name for both the to/from argument.
 	 */
+#ifdef HAVE_ZPL
 	err = zfs_secpolicy_rename_perms(snapname, snapname, CRED());
 	if (err != 0) {
 		strfree(snapname);
 		return (err == ENOENT ? 0 : err);
 	}
+#endif
 
-#ifdef _KERNEL
+/* XXX: Ignore for SPL version until mounting the FS is supported */
+#if defined(_KERNEL) && !defined(HAVE_SPL)
 	/*
 	 * For all filesystems undergoing rename, we'll need to unmount it.
 	 */
@@ -4036,3 +4039,51 @@ dsl_destroy_inconsistent(const char *dsname, void *arg)
 	}
 	return (0);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dsl_dataset_hold);
+EXPORT_SYMBOL(dsl_dataset_hold_obj);
+EXPORT_SYMBOL(dsl_dataset_own);
+EXPORT_SYMBOL(dsl_dataset_own_obj);
+EXPORT_SYMBOL(dsl_dataset_name);
+EXPORT_SYMBOL(dsl_dataset_rele);
+EXPORT_SYMBOL(dsl_dataset_disown);
+EXPORT_SYMBOL(dsl_dataset_drop_ref);
+EXPORT_SYMBOL(dsl_dataset_tryown);
+EXPORT_SYMBOL(dsl_dataset_make_exclusive);
+EXPORT_SYMBOL(dsl_dataset_create_sync);
+EXPORT_SYMBOL(dsl_dataset_create_sync_dd);
+EXPORT_SYMBOL(dsl_dataset_destroy);
+EXPORT_SYMBOL(dsl_snapshots_destroy);
+EXPORT_SYMBOL(dsl_dataset_destroy_check);
+EXPORT_SYMBOL(dsl_dataset_destroy_sync);
+EXPORT_SYMBOL(dsl_dataset_snapshot_check);
+EXPORT_SYMBOL(dsl_dataset_snapshot_sync);
+EXPORT_SYMBOL(dsl_dataset_rename);
+EXPORT_SYMBOL(dsl_dataset_promote);
+EXPORT_SYMBOL(dsl_dataset_clone_swap);
+EXPORT_SYMBOL(dsl_dataset_user_hold);
+EXPORT_SYMBOL(dsl_dataset_user_release);
+EXPORT_SYMBOL(dsl_dataset_user_release_tmp);
+EXPORT_SYMBOL(dsl_dataset_get_holds);
+EXPORT_SYMBOL(dsl_dataset_get_blkptr);
+EXPORT_SYMBOL(dsl_dataset_set_blkptr);
+EXPORT_SYMBOL(dsl_dataset_get_spa);
+EXPORT_SYMBOL(dsl_dataset_modified_since_lastsnap);
+EXPORT_SYMBOL(dsl_dataset_sync);
+EXPORT_SYMBOL(dsl_dataset_block_born);
+EXPORT_SYMBOL(dsl_dataset_block_kill);
+EXPORT_SYMBOL(dsl_dataset_block_freeable);
+EXPORT_SYMBOL(dsl_dataset_prev_snap_txg);
+EXPORT_SYMBOL(dsl_dataset_dirty);
+EXPORT_SYMBOL(dsl_dataset_stats);
+EXPORT_SYMBOL(dsl_dataset_fast_stat);
+EXPORT_SYMBOL(dsl_dataset_space);
+EXPORT_SYMBOL(dsl_dataset_fsid_guid);
+EXPORT_SYMBOL(dsl_dsobj_to_dsname);
+EXPORT_SYMBOL(dsl_dataset_check_quota);
+EXPORT_SYMBOL(dsl_dataset_set_quota);
+EXPORT_SYMBOL(dsl_dataset_set_quota_sync);
+EXPORT_SYMBOL(dsl_dataset_set_reservation);
+EXPORT_SYMBOL(dsl_destroy_inconsistent);
+#endif
diff --git a/module/zfs/dsl_deleg.c b/module/zfs/dsl_deleg.c
index 23c8baf94..6b5c8424a 100644
--- a/module/zfs/dsl_deleg.c
+++ b/module/zfs/dsl_deleg.c
@@ -753,3 +753,8 @@ dsl_delegation_on(objset_t *os)
 {
 	return (!!spa_delegation(os->os_spa));
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dsl_deleg_get);
+EXPORT_SYMBOL(dsl_deleg_set);
+#endif
diff --git a/module/zfs/dsl_dir.c b/module/zfs/dsl_dir.c
index 6ebf17f70..224cc0a3c 100644
--- a/module/zfs/dsl_dir.c
+++ b/module/zfs/dsl_dir.c
@@ -1419,3 +1419,10 @@ dsl_dir_snap_cmtime_update(dsl_dir_t *dd)
 	dd->dd_snap_cmtime = t;
 	mutex_exit(&dd->dd_lock);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dsl_dir_set_quota);
+EXPORT_SYMBOL(dsl_dir_set_reservation);
+EXPORT_SYMBOL(dsl_dir_open);
+EXPORT_SYMBOL(dsl_dir_close);
+#endif
diff --git a/module/zfs/dsl_prop.c b/module/zfs/dsl_prop.c
index af99d7415..0ba929a71 100644
--- a/module/zfs/dsl_prop.c
+++ b/module/zfs/dsl_prop.c
@@ -1153,3 +1153,10 @@ dsl_prop_nvlist_add_string(nvlist_t *nv, zfs_prop_t prop, const char *value)
 	VERIFY(nvlist_add_nvlist(nv, propname, propval) == 0);
 	nvlist_free(propval);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dsl_prop_set);
+EXPORT_SYMBOL(dsl_prop_get_all);
+EXPORT_SYMBOL(dsl_prop_nvlist_add_uint64);
+EXPORT_SYMBOL(dsl_prop_get_integer);
+#endif
diff --git a/module/zfs/dsl_synctask.c b/module/zfs/dsl_synctask.c
index 977702912..f807ccc69 100644
--- a/module/zfs/dsl_synctask.c
+++ b/module/zfs/dsl_synctask.c
@@ -238,3 +238,8 @@ dsl_sync_task_do_nowait(dsl_pool_t *dp,
 	    arg1, arg2, blocks_modified);
 	dsl_sync_task_group_nowait(dstg, tx);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dsl_sync_task_do);
+EXPORT_SYMBOL(dsl_sync_task_do_nowait);
+#endif
diff --git a/module/zfs/include/sys/spa_impl.h b/module/zfs/include/sys/spa_impl.h
index 8cab66992..1c34873b6 100644
--- a/module/zfs/include/sys/spa_impl.h
+++ b/module/zfs/include/sys/spa_impl.h
@@ -226,7 +226,7 @@ struct spa {
 	refcount_t	spa_refcount;		/* number of opens */
 };
 
-extern const char *spa_config_path;
+extern char *spa_config_path;
 
 #ifdef	__cplusplus
 }
diff --git a/module/zfs/spa.c b/module/zfs/spa.c
index afdfa1232..dea58f1e6 100644
--- a/module/zfs/spa.c
+++ b/module/zfs/spa.c
@@ -40,6 +40,7 @@
 #include <sys/zil.h>
 #include <sys/ddt.h>
 #include <sys/vdev_impl.h>
+#include <sys/vdev_disk.h>
 #include <sys/metaslab.h>
 #include <sys/metaslab_impl.h>
 #include <sys/uberblock_impl.h>
@@ -229,7 +230,9 @@ spa_prop_get(spa_t *spa, nvlist_t **nvp)
 	zap_attribute_t za;
 	int err;
 
-	VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
+	err = nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP);
+	if (err)
+		return err;
 
 	mutex_enter(&spa->spa_props_lock);
 
@@ -241,7 +244,7 @@ spa_prop_get(spa_t *spa, nvlist_t **nvp)
 	/* If no pool property object, no more prop to get. */
 	if (mos == NULL || spa->spa_pool_props_object == 0) {
 		mutex_exit(&spa->spa_props_lock);
-		return (0);
+		goto out;
 	}
 
 	/*
@@ -5858,3 +5861,62 @@ spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
 	zfs_ereport_post(name, spa, vd, NULL, 0, 0);
 #endif
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+/* state manipulation functions */
+EXPORT_SYMBOL(spa_open);
+EXPORT_SYMBOL(spa_open_rewind);
+EXPORT_SYMBOL(spa_get_stats);
+EXPORT_SYMBOL(spa_create);
+EXPORT_SYMBOL(spa_import_rootpool);
+EXPORT_SYMBOL(spa_import);
+EXPORT_SYMBOL(spa_tryimport);
+EXPORT_SYMBOL(spa_destroy);
+EXPORT_SYMBOL(spa_export);
+EXPORT_SYMBOL(spa_reset);
+EXPORT_SYMBOL(spa_async_request);
+EXPORT_SYMBOL(spa_async_suspend);
+EXPORT_SYMBOL(spa_async_resume);
+EXPORT_SYMBOL(spa_inject_addref);
+EXPORT_SYMBOL(spa_inject_delref);
+EXPORT_SYMBOL(spa_scan_stat_init);
+EXPORT_SYMBOL(spa_scan_get_stats);
+
+/* device maniion */
+EXPORT_SYMBOL(spa_vdev_add);
+EXPORT_SYMBOL(spa_vdev_attach);
+EXPORT_SYMBOL(spa_vdev_detach);
+EXPORT_SYMBOL(spa_vdev_remove);
+EXPORT_SYMBOL(spa_vdev_setpath);
+EXPORT_SYMBOL(spa_vdev_setfru);
+EXPORT_SYMBOL(spa_vdev_split_mirror);
+
+/* spare statech is global across all pools) */
+EXPORT_SYMBOL(spa_spare_add);
+EXPORT_SYMBOL(spa_spare_remove);
+EXPORT_SYMBOL(spa_spare_exists);
+EXPORT_SYMBOL(spa_spare_activate);
+
+/* L2ARC statech is global across all pools) */
+EXPORT_SYMBOL(spa_l2cache_add);
+EXPORT_SYMBOL(spa_l2cache_remove);
+EXPORT_SYMBOL(spa_l2cache_exists);
+EXPORT_SYMBOL(spa_l2cache_activate);
+EXPORT_SYMBOL(spa_l2cache_drop);
+
+/* scanning */
+EXPORT_SYMBOL(spa_scan);
+EXPORT_SYMBOL(spa_scan_stop);
+
+/* spa syncing */
+EXPORT_SYMBOL(spa_sync); /* only for DMU use */
+EXPORT_SYMBOL(spa_sync_allpools);
+
+/* properties */
+EXPORT_SYMBOL(spa_prop_set);
+EXPORT_SYMBOL(spa_prop_get);
+EXPORT_SYMBOL(spa_prop_clear_bootfs);
+
+/* asynchronous event notification */
+EXPORT_SYMBOL(spa_event_notify);
+#endif
diff --git a/module/zfs/spa_boot.c b/module/zfs/spa_boot.c
index a6cdb8189..be79542c9 100644
--- a/module/zfs/spa_boot.c
+++ b/module/zfs/spa_boot.c
@@ -24,6 +24,8 @@
  * Use is subject to license terms.
  */
 
+#ifdef _KERNEL
+
 #include <sys/zio.h>
 #include <sys/spa.h>
 #include <sys/sunddi.h>
@@ -44,3 +46,5 @@ spa_free_bootprop(char *value)
 {
 	ddi_prop_free(value);
 }
+
+#endif /* _KERNEL */
diff --git a/module/zfs/spa_config.c b/module/zfs/spa_config.c
index b7ef12a8f..79664cbe1 100644
--- a/module/zfs/spa_config.c
+++ b/module/zfs/spa_config.c
@@ -61,7 +61,7 @@ static uint64_t spa_config_generation = 1;
  * This can be overridden in userland to preserve an alternate namespace for
  * userland pools when doing testing.
  */
-const char *spa_config_path = ZPOOL_CACHE;
+char *spa_config_path = ZPOOL_CACHE;
 
 /*
  * Called when the module is first loaded, this routine loads the configuration
@@ -485,3 +485,15 @@ spa_config_update(spa_t *spa, int what)
 	if (what == SPA_CONFIG_UPDATE_POOL)
 		spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(spa_config_sync);
+EXPORT_SYMBOL(spa_config_load);
+EXPORT_SYMBOL(spa_all_configs);
+EXPORT_SYMBOL(spa_config_set);
+EXPORT_SYMBOL(spa_config_generate);
+EXPORT_SYMBOL(spa_config_update);
+
+module_param(spa_config_path, charp, 0444);
+MODULE_PARM_DESC(spa_config_path, "SPA config file (/etc/zfs/zpool.cache)");
+#endif
diff --git a/module/zfs/spa_errlog.c b/module/zfs/spa_errlog.c
index 282140b3b..3fab1922c 100644
--- a/module/zfs/spa_errlog.c
+++ b/module/zfs/spa_errlog.c
@@ -401,3 +401,14 @@ spa_errlog_sync(spa_t *spa, uint64_t txg)
 
 	mutex_exit(&spa->spa_errlog_lock);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+/* error handling */
+EXPORT_SYMBOL(spa_log_error);
+EXPORT_SYMBOL(spa_get_errlog_size);
+EXPORT_SYMBOL(spa_get_errlog);
+EXPORT_SYMBOL(spa_errlog_rotate);
+EXPORT_SYMBOL(spa_errlog_drain);
+EXPORT_SYMBOL(spa_errlog_sync);
+EXPORT_SYMBOL(spa_get_errlists);
+#endif
diff --git a/module/zfs/spa_history.c b/module/zfs/spa_history.c
index ce7d378c6..243f2b4ab 100644
--- a/module/zfs/spa_history.c
+++ b/module/zfs/spa_history.c
@@ -178,7 +178,11 @@ static char *
 spa_history_zone(void)
 {
 #ifdef _KERNEL
+#ifdef HAVE_SPL
+	return ("linux");
+#else
 	return (curproc->p_zone->zone_name);
+#endif
 #else
 	return ("global");
 #endif
@@ -499,3 +503,11 @@ spa_history_log_version(spa_t *spa, history_internal_events_t event)
 	    (u_longlong_t)current_vers, spa_name(spa), SPA_VERSION);
 #endif
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(spa_history_create_obj);
+EXPORT_SYMBOL(spa_history_get);
+EXPORT_SYMBOL(spa_history_log);
+EXPORT_SYMBOL(spa_history_log_internal);
+EXPORT_SYMBOL(spa_history_log_version);
+#endif
diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c
index 31e82d879..d4cfd3c89 100644
--- a/module/zfs/spa_misc.c
+++ b/module/zfs/spa_misc.c
@@ -1679,3 +1679,83 @@ spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps)
 
 	return (0);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+/* Namespace manipulation */
+EXPORT_SYMBOL(spa_lookup);
+EXPORT_SYMBOL(spa_add);
+EXPORT_SYMBOL(spa_remove);
+EXPORT_SYMBOL(spa_next);
+
+/* Refcount functions */
+EXPORT_SYMBOL(spa_open_ref);
+EXPORT_SYMBOL(spa_close);
+EXPORT_SYMBOL(spa_refcount_zero);
+
+/* Pool configuration lock */
+EXPORT_SYMBOL(spa_config_tryenter);
+EXPORT_SYMBOL(spa_config_enter);
+EXPORT_SYMBOL(spa_config_exit);
+EXPORT_SYMBOL(spa_config_held);
+
+/* Pool vdev add/remove lock */
+EXPORT_SYMBOL(spa_vdev_enter);
+EXPORT_SYMBOL(spa_vdev_exit);
+
+/* Pool vdev state change lock */
+EXPORT_SYMBOL(spa_vdev_state_enter);
+EXPORT_SYMBOL(spa_vdev_state_exit);
+
+/* Accessor functions */
+EXPORT_SYMBOL(spa_shutting_down);
+EXPORT_SYMBOL(spa_get_dsl);
+EXPORT_SYMBOL(spa_get_rootblkptr);
+EXPORT_SYMBOL(spa_set_rootblkptr);
+EXPORT_SYMBOL(spa_altroot);
+EXPORT_SYMBOL(spa_sync_pass);
+EXPORT_SYMBOL(spa_name);
+EXPORT_SYMBOL(spa_guid);
+EXPORT_SYMBOL(spa_last_synced_txg);
+EXPORT_SYMBOL(spa_first_txg);
+EXPORT_SYMBOL(spa_syncing_txg);
+EXPORT_SYMBOL(spa_version);
+EXPORT_SYMBOL(spa_state);
+EXPORT_SYMBOL(spa_load_state);
+EXPORT_SYMBOL(spa_freeze_txg);
+EXPORT_SYMBOL(spa_get_asize);
+EXPORT_SYMBOL(spa_get_dspace);
+EXPORT_SYMBOL(spa_update_dspace);
+EXPORT_SYMBOL(spa_deflate);
+EXPORT_SYMBOL(spa_normal_class);
+EXPORT_SYMBOL(spa_log_class);
+EXPORT_SYMBOL(spa_max_replication);
+EXPORT_SYMBOL(spa_prev_software_version);
+EXPORT_SYMBOL(spa_get_failmode);
+EXPORT_SYMBOL(spa_suspended);
+EXPORT_SYMBOL(spa_bootfs);
+EXPORT_SYMBOL(spa_delegation);
+EXPORT_SYMBOL(spa_meta_objset);
+
+/* Miscellaneous support routines */
+EXPORT_SYMBOL(spa_rename);
+EXPORT_SYMBOL(spa_guid_exists);
+EXPORT_SYMBOL(spa_strdup);
+EXPORT_SYMBOL(spa_strfree);
+EXPORT_SYMBOL(spa_get_random);
+EXPORT_SYMBOL(spa_generate_guid);
+EXPORT_SYMBOL(sprintf_blkptr);
+EXPORT_SYMBOL(spa_freeze);
+EXPORT_SYMBOL(spa_upgrade);
+EXPORT_SYMBOL(spa_evict_all);
+EXPORT_SYMBOL(spa_lookup_by_guid);
+EXPORT_SYMBOL(spa_has_spare);
+EXPORT_SYMBOL(dva_get_dsize_sync);
+EXPORT_SYMBOL(bp_get_dsize_sync);
+EXPORT_SYMBOL(bp_get_dsize);
+EXPORT_SYMBOL(spa_has_slogs);
+EXPORT_SYMBOL(spa_is_root);
+EXPORT_SYMBOL(spa_writeable);
+EXPORT_SYMBOL(spa_mode);
+
+EXPORT_SYMBOL(spa_namespace_lock);
+#endif
diff --git a/module/zfs/txg.c b/module/zfs/txg.c
index 5fc086e5d..382a2a91c 100644
--- a/module/zfs/txg.c
+++ b/module/zfs/txg.c
@@ -722,3 +722,19 @@ txg_list_next(txg_list_t *tl, void *p, uint64_t txg)
 
 	return (tn == NULL ? NULL : (char *)tn - tl->tl_offset);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(txg_init);
+EXPORT_SYMBOL(txg_fini);
+EXPORT_SYMBOL(txg_sync_start);
+EXPORT_SYMBOL(txg_sync_stop);
+EXPORT_SYMBOL(txg_hold_open);
+EXPORT_SYMBOL(txg_rele_to_quiesce);
+EXPORT_SYMBOL(txg_rele_to_sync);
+EXPORT_SYMBOL(txg_register_callbacks);
+EXPORT_SYMBOL(txg_delay);
+EXPORT_SYMBOL(txg_wait_synced);
+EXPORT_SYMBOL(txg_wait_open);
+EXPORT_SYMBOL(txg_stalled);
+EXPORT_SYMBOL(txg_sync_waiting);
+#endif
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 1c14c7750..4bed646b3 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -3167,3 +3167,11 @@ vdev_split(vdev_t *vd)
 	}
 	vdev_propagate_state(cvd);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(vdev_fault);
+EXPORT_SYMBOL(vdev_degrade);
+EXPORT_SYMBOL(vdev_online);
+EXPORT_SYMBOL(vdev_offline);
+EXPORT_SYMBOL(vdev_clear);
+#endif
diff --git a/module/zfs/vdev_queue.c b/module/zfs/vdev_queue.c
index 8f8663526..04ef63eb9 100644
--- a/module/zfs/vdev_queue.c
+++ b/module/zfs/vdev_queue.c
@@ -405,3 +405,14 @@ vdev_queue_io_done(zio_t *zio)
 
 	mutex_exit(&vq->vq_lock);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+module_param(zfs_vdev_max_pending, int, 0644);
+MODULE_PARM_DESC(zfs_vdev_max_pending, "Maximum pending VDEV IO");
+
+module_param(zfs_vdev_min_pending, int, 0644);
+MODULE_PARM_DESC(zfs_vdev_min_pending, "Minimum pending VDEV IO");
+
+module_param(zfs_vdev_aggregation_limit, int, 0644);
+MODULE_PARM_DESC(zfs_vdev_aggregation_limit, "Maximum VDEV IO aggregation");
+#endif
diff --git a/module/zfs/zap_micro.c b/module/zfs/zap_micro.c
index 04369bbc5..3c2147504 100644
--- a/module/zfs/zap_micro.c
+++ b/module/zfs/zap_micro.c
@@ -1454,3 +1454,19 @@ zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add,
 	zap_unlockdir(zap);
 	return (err);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(zap_add);
+EXPORT_SYMBOL(zap_create);
+EXPORT_SYMBOL(zap_cursor_advance);
+EXPORT_SYMBOL(zap_cursor_fini);
+EXPORT_SYMBOL(zap_cursor_init);
+EXPORT_SYMBOL(zap_cursor_init_serialized);
+EXPORT_SYMBOL(zap_cursor_move_to_key);
+EXPORT_SYMBOL(zap_cursor_retrieve);
+EXPORT_SYMBOL(zap_cursor_serialize);
+EXPORT_SYMBOL(zap_lookup);
+EXPORT_SYMBOL(zap_lookup_norm);
+EXPORT_SYMBOL(zap_remove);
+EXPORT_SYMBOL(zap_update);
+#endif
diff --git a/module/zfs/zfs_byteswap.c b/module/zfs/zfs_byteswap.c
index 6048eb124..16327a225 100644
--- a/module/zfs/zfs_byteswap.c
+++ b/module/zfs/zfs_byteswap.c
@@ -197,3 +197,9 @@ zfs_znode_byteswap(void *buf, size_t size)
 		    ACE_SLOT_CNT);
 	}
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(zfs_oldacl_byteswap);
+EXPORT_SYMBOL(zfs_acl_byteswap);
+EXPORT_SYMBOL(zfs_znode_byteswap);
+#endif
diff --git a/module/zfs/zfs_znode.c b/module/zfs/zfs_znode.c
index 5e6bab81a..4f6185fb5 100644
--- a/module/zfs/zfs_znode.c
+++ b/module/zfs/zfs_znode.c
@@ -2162,3 +2162,8 @@ zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb,
 	zfs_release_sa_handle(hdl, db);
 	return (error);
 }
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(zfs_create_fs);
+EXPORT_SYMBOL(zfs_obj_to_path);
+#endif
diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index c7eb66103..70d3addf5 100644
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -74,6 +74,7 @@ kmem_cache_t *zio_cache;
 kmem_cache_t *zio_link_cache;
 kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
 kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
+int zio_bulk_flags = 0;
 
 #ifdef _KERNEL
 extern vmem_t *zio_alloc_arena;
@@ -136,12 +137,14 @@ zio_init(void)
 			(void) sprintf(name, "zio_buf_%lu", (ulong_t)size);
 			zio_buf_cache[c] = kmem_cache_create(name, size,
 			    align, NULL, NULL, NULL, NULL, NULL,
-			    size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
+			    (size > zio_buf_debug_limit ? KMC_NODEBUG : 0) |
+			    zio_bulk_flags);
 
 			(void) sprintf(name, "zio_data_buf_%lu", (ulong_t)size);
 			zio_data_buf_cache[c] = kmem_cache_create(name, size,
 			    align, NULL, NULL, NULL, NULL, data_alloc_arena,
-			    size > zio_buf_debug_limit ? KMC_NODEBUG : 0);
+			    (size > zio_buf_debug_limit ? KMC_NODEBUG : 0) |
+			    zio_bulk_flags);
 		}
 	}
 
@@ -2975,3 +2978,19 @@ static zio_pipe_stage_t *zio_pipeline[] = {
 	zio_checksum_verify,
 	zio_done
 };
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+/* Fault injection */
+EXPORT_SYMBOL(zio_injection_enabled);
+EXPORT_SYMBOL(zio_inject_fault);
+EXPORT_SYMBOL(zio_inject_list_next);
+EXPORT_SYMBOL(zio_clear_fault);
+EXPORT_SYMBOL(zio_handle_fault_injection);
+EXPORT_SYMBOL(zio_handle_device_injection);
+EXPORT_SYMBOL(zio_handle_label_injection);
+EXPORT_SYMBOL(zio_priority_table);
+EXPORT_SYMBOL(zio_type_name);
+
+module_param(zio_bulk_flags, int, 0644);
+MODULE_PARM_DESC(zio_bulk_flags, "Additional flags to pass to bulk buffers");
+#endif