1 files changed, 0 insertions, 321 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c
deleted file mode 100644
index b03a3c4abd45..000000000000
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
- */
-
-#include <sys/zfs_context.h>
-#include <sys/refcount.h>
-
-#ifdef	ZFS_DEBUG
-
-#ifdef _KERNEL
-int reference_tracking_enable = FALSE; /* runs out of memory too easily */
-SYSCTL_DECL(_vfs_zfs);
-SYSCTL_INT(_vfs_zfs, OID_AUTO, reference_tracking_enable, CTLFLAG_RDTUN,
-    &reference_tracking_enable, 0,
-    "Track reference holders to refcount_t objects, used mostly by ZFS");
-#else
-int reference_tracking_enable = TRUE;
-#endif
-int reference_history = 3; /* tunable */
-
-static kmem_cache_t *reference_cache;
-static kmem_cache_t *reference_history_cache;
-
-void
-zfs_refcount_init(void)
-{
-	reference_cache = kmem_cache_create("reference_cache",
-	    sizeof (reference_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
-
-	reference_history_cache = kmem_cache_create("reference_history_cache",
-	    sizeof (uint64_t), 0, NULL, NULL, NULL, NULL, NULL, 0);
-}
-
-void
-zfs_refcount_fini(void)
-{
-	kmem_cache_destroy(reference_cache);
-	kmem_cache_destroy(reference_history_cache);
-}
-
-void
-zfs_refcount_create(zfs_refcount_t *rc)
-{
-	mutex_init(&rc->rc_mtx, NULL, MUTEX_DEFAULT, NULL);
-	list_create(&rc->rc_list, sizeof (reference_t),
-	    offsetof(reference_t, ref_link));
-	list_create(&rc->rc_removed, sizeof (reference_t),
-	    offsetof(reference_t, ref_link));
-	rc->rc_count = 0;
-	rc->rc_removed_count = 0;
-	rc->rc_tracked = reference_tracking_enable;
-}
-
-void
-zfs_refcount_create_tracked(zfs_refcount_t *rc)
-{
-	zfs_refcount_create(rc);
-	rc->rc_tracked = B_TRUE;
-}
-
-void
-zfs_refcount_create_untracked(zfs_refcount_t *rc)
-{
-	zfs_refcount_create(rc);
-	rc->rc_tracked = B_FALSE;
-}
-
-void
-zfs_refcount_destroy_many(zfs_refcount_t *rc, uint64_t number)
-{
-	reference_t *ref;
-
-	ASSERT(rc->rc_count == number);
-	while (ref = list_head(&rc->rc_list)) {
-		list_remove(&rc->rc_list, ref);
-		kmem_cache_free(reference_cache, ref);
-	}
-	list_destroy(&rc->rc_list);
-
-	while (ref = list_head(&rc->rc_removed)) {
-		list_remove(&rc->rc_removed, ref);
-		kmem_cache_free(reference_history_cache, ref->ref_removed);
-		kmem_cache_free(reference_cache, ref);
-	}
-	list_destroy(&rc->rc_removed);
-	mutex_destroy(&rc->rc_mtx);
-}
-
-void
-zfs_refcount_destroy(zfs_refcount_t *rc)
-{
-	zfs_refcount_destroy_many(rc, 0);
-}
-
-int
-zfs_refcount_is_zero(zfs_refcount_t *rc)
-{
-	return (rc->rc_count == 0);
-}
-
-int64_t
-zfs_refcount_count(zfs_refcount_t *rc)
-{
-	return (rc->rc_count);
-}
-
-int64_t
-zfs_refcount_add_many(zfs_refcount_t *rc, uint64_t number, void *holder)
-{
-	reference_t *ref = NULL;
-	int64_t count;
-
-	if (rc->rc_tracked) {
-		ref = kmem_cache_alloc(reference_cache, KM_SLEEP);
-		ref->ref_holder = holder;
-		ref->ref_number = number;
-	}
-	mutex_enter(&rc->rc_mtx);
-	ASSERT(rc->rc_count >= 0);
-	if (rc->rc_tracked)
-		list_insert_head(&rc->rc_list, ref);
-	rc->rc_count += number;
-	count = rc->rc_count;
-	mutex_exit(&rc->rc_mtx);
-
-	return (count);
-}
-
-int64_t
-zfs_refcount_add(zfs_refcount_t *rc, void *holder)
-{
-	return (zfs_refcount_add_many(rc, 1, holder));
-}
-
-int64_t
-zfs_refcount_remove_many(zfs_refcount_t *rc, uint64_t number, void *holder)
-{
-	reference_t *ref;
-	int64_t count;
-
-	mutex_enter(&rc->rc_mtx);
-	ASSERT(rc->rc_count >= number);
-
-	if (!rc->rc_tracked) {
-		rc->rc_count -= number;
-		count = rc->rc_count;
-		mutex_exit(&rc->rc_mtx);
-		return (count);
-	}
-
-	for (ref = list_head(&rc->rc_list); ref;
-	    ref = list_next(&rc->rc_list, ref)) {
-		if (ref->ref_holder == holder && ref->ref_number == number) {
-			list_remove(&rc->rc_list, ref);
-			if (reference_history > 0) {
-				ref->ref_removed =
-				    kmem_cache_alloc(reference_history_cache,
-				    KM_SLEEP);
-				list_insert_head(&rc->rc_removed, ref);
-				rc->rc_removed_count++;
-				if (rc->rc_removed_count > reference_history) {
-					ref = list_tail(&rc->rc_removed);
-					list_remove(&rc->rc_removed, ref);
-					kmem_cache_free(reference_history_cache,
-					    ref->ref_removed);
-					kmem_cache_free(reference_cache, ref);
-					rc->rc_removed_count--;
-				}
-			} else {
-				kmem_cache_free(reference_cache, ref);
-			}
-			rc->rc_count -= number;
-			count = rc->rc_count;
-			mutex_exit(&rc->rc_mtx);
-			return (count);
-		}
-	}
-	panic("No such hold %p on refcount %llx", holder,
-	    (u_longlong_t)(uintptr_t)rc);
-	return (-1);
-}
-
-int64_t
-zfs_refcount_remove(zfs_refcount_t *rc, void *holder)
-{
-	return (zfs_refcount_remove_many(rc, 1, holder));
-}
-
-void
-zfs_refcount_transfer(zfs_refcount_t *dst, zfs_refcount_t *src)
-{
-	int64_t count, removed_count;
-	list_t list, removed;
-
-	list_create(&list, sizeof (reference_t),
-	    offsetof(reference_t, ref_link));
-	list_create(&removed, sizeof (reference_t),
-	    offsetof(reference_t, ref_link));
-
-	mutex_enter(&src->rc_mtx);
-	count = src->rc_count;
-	removed_count = src->rc_removed_count;
-	src->rc_count = 0;
-	src->rc_removed_count = 0;
-	list_move_tail(&list, &src->rc_list);
-	list_move_tail(&removed, &src->rc_removed);
-	mutex_exit(&src->rc_mtx);
-
-	mutex_enter(&dst->rc_mtx);
-	dst->rc_count += count;
-	dst->rc_removed_count += removed_count;
-	list_move_tail(&dst->rc_list, &list);
-	list_move_tail(&dst->rc_removed, &removed);
-	mutex_exit(&dst->rc_mtx);
-
-	list_destroy(&list);
-	list_destroy(&removed);
-}
-
-void
-zfs_refcount_transfer_ownership(zfs_refcount_t *rc, void *current_holder,
-    void *new_holder)
-{
-	reference_t *ref;
-	boolean_t found = B_FALSE;
-
-	mutex_enter(&rc->rc_mtx);
-	if (!rc->rc_tracked) {
-		mutex_exit(&rc->rc_mtx);
-		return;
-	}
-
-	for (ref = list_head(&rc->rc_list); ref;
-	    ref = list_next(&rc->rc_list, ref)) {
-		if (ref->ref_holder == current_holder) {
-			ref->ref_holder = new_holder;
-			found = B_TRUE;
-			break;
-		}
-	}
-	ASSERT(found);
-	mutex_exit(&rc->rc_mtx);
-}
-
-/*
- * If tracking is enabled, return true if a reference exists that matches
- * the "holder" tag. If tracking is disabled, then return true if a reference
- * might be held.
- */
-boolean_t
-zfs_refcount_held(zfs_refcount_t *rc, void *holder)
-{
-	reference_t *ref;
-
-	mutex_enter(&rc->rc_mtx);
-
-	if (!rc->rc_tracked) {
-		mutex_exit(&rc->rc_mtx);
-		return (rc->rc_count > 0);
-	}
-
-	for (ref = list_head(&rc->rc_list); ref;
-	    ref = list_next(&rc->rc_list, ref)) {
-		if (ref->ref_holder == holder) {
-			mutex_exit(&rc->rc_mtx);
-			return (B_TRUE);
-		}
-	}
-	mutex_exit(&rc->rc_mtx);
-	return (B_FALSE);
-}
-
-/*
- * If tracking is enabled, return true if a reference does not exist that
- * matches the "holder" tag. If tracking is disabled, always return true
- * since the reference might not be held.
- */
-boolean_t
-zfs_refcount_not_held(zfs_refcount_t *rc, void *holder)
-{
-	reference_t *ref;
-
-	mutex_enter(&rc->rc_mtx);
-
-	if (!rc->rc_tracked) {
-		mutex_exit(&rc->rc_mtx);
-		return (B_TRUE);
-	}
-
-	for (ref = list_head(&rc->rc_list); ref;
-	    ref = list_next(&rc->rc_list, ref)) {
-		if (ref->ref_holder == holder) {
-			mutex_exit(&rc->rc_mtx);
-			return (B_FALSE);
-		}
-	}
-	mutex_exit(&rc->rc_mtx);
-	return (B_TRUE);
-}
-#endif	/* ZFS_DEBUG */