libspl: move procfs_list implementation from libzpool

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17861

lib/libspl/Makefile.am

@@ -24,6 +24,7 @@ libspl_la_SOURCES = \
 	%D%/mkdirp.c \
 	%D%/mutex.c \
 	%D%/page.c \
+	%D%/procfs_list.c \
 	%D%/rwlock.c \
 	%D%/strlcat.c \
 	%D%/strlcpy.c \

lib/libspl/procfs_list.c

@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: CDDL-1.0
+/*
+ * 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 https://opensource.org/licenses/CDDL-1.0.
+ * 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, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2016 Actifio, Inc. All rights reserved.
+ * Copyright (c) 2025, Klara, Inc.
+ */
+
+#include <assert.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <sys/procfs_list.h>
+#include <sys/mutex.h>
+#include <sys/list.h>
+
+/*
+ * =========================================================================
+ * procfs list
+ * =========================================================================
+ */
+
+void
+seq_printf(struct seq_file *m, const char *fmt, ...)
+{
+	(void) m, (void) fmt;
+}
+
+void
+procfs_list_install(const char *module,
+    const char *submodule,
+    const char *name,
+    mode_t mode,
+    procfs_list_t *procfs_list,
+    int (*show)(struct seq_file *f, void *p),
+    int (*show_header)(struct seq_file *f),
+    int (*clear)(procfs_list_t *procfs_list),
+    size_t procfs_list_node_off)
+{
+	(void) module, (void) submodule, (void) name, (void) mode, (void) show,
+	    (void) show_header, (void) clear;
+	mutex_init(&procfs_list->pl_lock, NULL, MUTEX_DEFAULT, NULL);
+	list_create(&procfs_list->pl_list,
+	    procfs_list_node_off + sizeof (procfs_list_node_t),
+	    procfs_list_node_off + offsetof(procfs_list_node_t, pln_link));
+	procfs_list->pl_next_id = 1;
+	procfs_list->pl_node_offset = procfs_list_node_off;
+}
+
+void
+procfs_list_uninstall(procfs_list_t *procfs_list)
+{
+	(void) procfs_list;
+}
+
+void
+procfs_list_destroy(procfs_list_t *procfs_list)
+{
+	ASSERT(list_is_empty(&procfs_list->pl_list));
+	list_destroy(&procfs_list->pl_list);
+	mutex_destroy(&procfs_list->pl_lock);
+}
+
+#define	NODE_ID(procfs_list, obj) \
+		(((procfs_list_node_t *)(((char *)obj) + \
+		(procfs_list)->pl_node_offset))->pln_id)
+
+void
+procfs_list_add(procfs_list_t *procfs_list, void *p)
+{
+	ASSERT(MUTEX_HELD(&procfs_list->pl_lock));
+	NODE_ID(procfs_list, p) = procfs_list->pl_next_id++;
+	list_insert_tail(&procfs_list->pl_list, p);
+}

lib/libzpool/kernel.c

@@ -74,65 +74,6 @@ zone_get_hostid(void *zonep)
 	return (hostid);
 }
 
-/*
- * =========================================================================
- * procfs list
- * =========================================================================
- */
-
-void
-seq_printf(struct seq_file *m, const char *fmt, ...)
-{
-	(void) m, (void) fmt;
-}
-
-void
-procfs_list_install(const char *module,
-    const char *submodule,
-    const char *name,
-    mode_t mode,
-    procfs_list_t *procfs_list,
-    int (*show)(struct seq_file *f, void *p),
-    int (*show_header)(struct seq_file *f),
-    int (*clear)(procfs_list_t *procfs_list),
-    size_t procfs_list_node_off)
-{
-	(void) module, (void) submodule, (void) name, (void) mode, (void) show,
-	    (void) show_header, (void) clear;
-	mutex_init(&procfs_list->pl_lock, NULL, MUTEX_DEFAULT, NULL);
-	list_create(&procfs_list->pl_list,
-	    procfs_list_node_off + sizeof (procfs_list_node_t),
-	    procfs_list_node_off + offsetof(procfs_list_node_t, pln_link));
-	procfs_list->pl_next_id = 1;
-	procfs_list->pl_node_offset = procfs_list_node_off;
-}
-
-void
-procfs_list_uninstall(procfs_list_t *procfs_list)
-{
-	(void) procfs_list;
-}
-
-void
-procfs_list_destroy(procfs_list_t *procfs_list)
-{
-	ASSERT(list_is_empty(&procfs_list->pl_list));
-	list_destroy(&procfs_list->pl_list);
-	mutex_destroy(&procfs_list->pl_lock);
-}
-
-#define	NODE_ID(procfs_list, obj) \
-		(((procfs_list_node_t *)(((char *)obj) + \
-		(procfs_list)->pl_node_offset))->pln_id)
-
-void
-procfs_list_add(procfs_list_t *procfs_list, void *p)
-{
-	ASSERT(MUTEX_HELD(&procfs_list->pl_lock));
-	NODE_ID(procfs_list, p) = procfs_list->pl_next_id++;
-	list_insert_tail(&procfs_list->pl_list, p);
-}
-
 /*
  * =========================================================================
  * vnode operations