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-rw-r--r--common/zfs/zfs_comutil.c202
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diff --git a/common/zfs/zfs_comutil.c b/common/zfs/zfs_comutil.c
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+/*
+ * This file is intended for functions that ought to be common between user
+ * land (libzfs) and the kernel. When many common routines need to be shared
+ * then a separate file should to be created.
+ */
+
+#if defined(_KERNEL)
+#include <sys/systm.h>
+#else
+#include <string.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+#include <sys/int_limits.h>
+#include <sys/nvpair.h>
+#include "zfs_comutil.h"
+
+/*
+ * Are there allocatable vdevs?
+ */
+boolean_t
+zfs_allocatable_devs(nvlist_t *nv)
+{
+ uint64_t is_log;
+ uint_t c;
+ nvlist_t **child;
+ uint_t children;
+
+ if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
+ &child, &children) != 0) {
+ return (B_FALSE);
+ }
+ for (c = 0; c < children; c++) {
+ is_log = 0;
+ (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
+ &is_log);
+ if (!is_log)
+ return (B_TRUE);
+ }
+ return (B_FALSE);
+}
+
+void
+zpool_get_rewind_policy(nvlist_t *nvl, zpool_rewind_policy_t *zrpp)
+{
+ nvlist_t *policy;
+ nvpair_t *elem;
+ char *nm;
+
+ /* Defaults */
+ zrpp->zrp_request = ZPOOL_NO_REWIND;
+ zrpp->zrp_maxmeta = 0;
+ zrpp->zrp_maxdata = UINT64_MAX;
+ zrpp->zrp_txg = UINT64_MAX;
+
+ if (nvl == NULL)
+ return;
+
+ elem = NULL;
+ while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
+ nm = nvpair_name(elem);
+ if (strcmp(nm, ZPOOL_REWIND_POLICY) == 0) {
+ if (nvpair_value_nvlist(elem, &policy) == 0)
+ zpool_get_rewind_policy(policy, zrpp);
+ return;
+ } else if (strcmp(nm, ZPOOL_REWIND_REQUEST) == 0) {
+ if (nvpair_value_uint32(elem, &zrpp->zrp_request) == 0)
+ if (zrpp->zrp_request & ~ZPOOL_REWIND_POLICIES)
+ zrpp->zrp_request = ZPOOL_NO_REWIND;
+ } else if (strcmp(nm, ZPOOL_REWIND_REQUEST_TXG) == 0) {
+ (void) nvpair_value_uint64(elem, &zrpp->zrp_txg);
+ } else if (strcmp(nm, ZPOOL_REWIND_META_THRESH) == 0) {
+ (void) nvpair_value_uint64(elem, &zrpp->zrp_maxmeta);
+ } else if (strcmp(nm, ZPOOL_REWIND_DATA_THRESH) == 0) {
+ (void) nvpair_value_uint64(elem, &zrpp->zrp_maxdata);
+ }
+ }
+ if (zrpp->zrp_request == 0)
+ zrpp->zrp_request = ZPOOL_NO_REWIND;
+}
+
+typedef struct zfs_version_spa_map {
+ int version_zpl;
+ int version_spa;
+} zfs_version_spa_map_t;
+
+/*
+ * Keep this table in monotonically increasing version number order.
+ */
+static zfs_version_spa_map_t zfs_version_table[] = {
+ {ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL},
+ {ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL},
+ {ZPL_VERSION_FUID, SPA_VERSION_FUID},
+ {ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
+ {ZPL_VERSION_SA, SPA_VERSION_SA},
+ {0, 0}
+};
+
+/*
+ * Return the max zpl version for a corresponding spa version
+ * -1 is returned if no mapping exists.
+ */
+int
+zfs_zpl_version_map(int spa_version)
+{
+ int i;
+ int version = -1;
+
+ for (i = 0; zfs_version_table[i].version_spa; i++) {
+ if (spa_version >= zfs_version_table[i].version_spa)
+ version = zfs_version_table[i].version_zpl;
+ }
+
+ return (version);
+}
+
+/*
+ * Return the min spa version for a corresponding spa version
+ * -1 is returned if no mapping exists.
+ */
+int
+zfs_spa_version_map(int zpl_version)
+{
+ int i;
+ int version = -1;
+
+ for (i = 0; zfs_version_table[i].version_zpl; i++) {
+ if (zfs_version_table[i].version_zpl >= zpl_version)
+ return (zfs_version_table[i].version_spa);
+ }
+
+ return (version);
+}
+
+const char *zfs_history_event_names[LOG_END] = {
+ "invalid event",
+ "pool create",
+ "vdev add",
+ "pool remove",
+ "pool destroy",
+ "pool export",
+ "pool import",
+ "vdev attach",
+ "vdev replace",
+ "vdev detach",
+ "vdev online",
+ "vdev offline",
+ "vdev upgrade",
+ "pool clear",
+ "pool scrub",
+ "pool property set",
+ "create",
+ "clone",
+ "destroy",
+ "destroy_begin_sync",
+ "inherit",
+ "property set",
+ "quota set",
+ "permission update",
+ "permission remove",
+ "permission who remove",
+ "promote",
+ "receive",
+ "rename",
+ "reservation set",
+ "replay_inc_sync",
+ "replay_full_sync",
+ "rollback",
+ "snapshot",
+ "filesystem version upgrade",
+ "refquota set",
+ "refreservation set",
+ "pool scrub done",
+ "user hold",
+ "user release",
+ "pool split",
+};