1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
25 * Copyright (c) 2016 Actifio, Inc. All rights reserved.
26 * Copyright (c) 2025, Klara, Inc.
27 */
28
29 #include <assert.h>
30 #include <pthread.h>
31 #include <stddef.h>
32 #include <sys/procfs_list.h>
33 #include <sys/mutex.h>
34 #include <sys/list.h>
35
36 /*
37 * =========================================================================
38 * procfs list
39 * =========================================================================
40 */
41
42 void
seq_printf(struct seq_file * m,const char * fmt,...)43 seq_printf(struct seq_file *m, const char *fmt, ...)
44 {
45 (void) m, (void) fmt;
46 }
47
48 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)49 procfs_list_install(const char *module,
50 const char *submodule,
51 const char *name,
52 mode_t mode,
53 procfs_list_t *procfs_list,
54 int (*show)(struct seq_file *f, void *p),
55 int (*show_header)(struct seq_file *f),
56 int (*clear)(procfs_list_t *procfs_list),
57 size_t procfs_list_node_off)
58 {
59 (void) module, (void) submodule, (void) name, (void) mode, (void) show,
60 (void) show_header, (void) clear;
61 mutex_init(&procfs_list->pl_lock, NULL, MUTEX_DEFAULT, NULL);
62 list_create(&procfs_list->pl_list,
63 procfs_list_node_off + sizeof (procfs_list_node_t),
64 procfs_list_node_off + offsetof(procfs_list_node_t, pln_link));
65 procfs_list->pl_next_id = 1;
66 procfs_list->pl_node_offset = procfs_list_node_off;
67 }
68
69 void
procfs_list_uninstall(procfs_list_t * procfs_list)70 procfs_list_uninstall(procfs_list_t *procfs_list)
71 {
72 (void) procfs_list;
73 }
74
75 void
procfs_list_destroy(procfs_list_t * procfs_list)76 procfs_list_destroy(procfs_list_t *procfs_list)
77 {
78 ASSERT(list_is_empty(&procfs_list->pl_list));
79 list_destroy(&procfs_list->pl_list);
80 mutex_destroy(&procfs_list->pl_lock);
81 }
82
83 #define NODE_ID(procfs_list, obj) \
84 (((procfs_list_node_t *)(((char *)obj) + \
85 (procfs_list)->pl_node_offset))->pln_id)
86
87 void
procfs_list_add(procfs_list_t * procfs_list,void * p)88 procfs_list_add(procfs_list_t *procfs_list, void *p)
89 {
90 ASSERT(MUTEX_HELD(&procfs_list->pl_lock));
91 NODE_ID(procfs_list, p) = procfs_list->pl_next_id++;
92 list_insert_tail(&procfs_list->pl_list, p);
93 }
94