1 // SPDX-License-Identifier: GPL-2.0-only
3 * This file is part of UBIFS.
5 * Copyright (C) 2021 Cisco Systems
7 * Author: Stefan Schaeckeler
21 struct attribute attr;
22 enum attr_id_t attr_id;
25 #define UBIFS_ATTR(_name, _mode, _id) \
26 static struct ubifs_attr ubifs_attr_##_name = { \
27 .attr = {.name = __stringify(_name), .mode = _mode }, \
28 .attr_id = attr_##_id, \
31 #define UBIFS_ATTR_FUNC(_name, _mode) UBIFS_ATTR(_name, _mode, _name)
33 UBIFS_ATTR_FUNC(errors_magic, 0444);
34 UBIFS_ATTR_FUNC(errors_crc, 0444);
35 UBIFS_ATTR_FUNC(errors_node, 0444);
37 #define ATTR_LIST(name) (&ubifs_attr_##name.attr)
39 static struct attribute *ubifs_attrs[] = {
40 ATTR_LIST(errors_magic),
41 ATTR_LIST(errors_node),
42 ATTR_LIST(errors_crc),
46 static ssize_t ubifs_attr_show(struct kobject *kobj,
47 struct attribute *attr, char *buf)
49 struct ubifs_info *sbi = container_of(kobj, struct ubifs_info,
52 struct ubifs_attr *a = container_of(attr, struct ubifs_attr, attr);
55 case attr_errors_magic:
56 return sysfs_emit(buf, "%u\n", sbi->stats->magic_errors);
57 case attr_errors_node:
58 return sysfs_emit(buf, "%u\n", sbi->stats->node_errors);
60 return sysfs_emit(buf, "%u\n", sbi->stats->crc_errors);
65 static void ubifs_sb_release(struct kobject *kobj)
67 struct ubifs_info *c = container_of(kobj, struct ubifs_info, kobj);
69 complete(&c->kobj_unregister);
72 static const struct sysfs_ops ubifs_attr_ops = {
73 .show = ubifs_attr_show,
76 static struct kobj_type ubifs_sb_ktype = {
77 .default_attrs = ubifs_attrs,
78 .sysfs_ops = &ubifs_attr_ops,
79 .release = ubifs_sb_release,
82 static struct kobj_type ubifs_ktype = {
83 .sysfs_ops = &ubifs_attr_ops,
86 static struct kset ubifs_kset = {
87 .kobj = {.ktype = &ubifs_ktype},
90 int ubifs_sysfs_register(struct ubifs_info *c)
93 char dfs_dir_name[UBIFS_DFS_DIR_LEN+1];
95 c->stats = kzalloc(sizeof(struct ubifs_stats_info), GFP_KERNEL);
100 n = snprintf(dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME,
101 c->vi.ubi_num, c->vi.vol_id);
103 if (n > UBIFS_DFS_DIR_LEN) {
104 /* The array size is too small */
109 c->kobj.kset = &ubifs_kset;
110 init_completion(&c->kobj_unregister);
112 ret = kobject_init_and_add(&c->kobj, &ubifs_sb_ktype, NULL,
120 kobject_put(&c->kobj);
121 wait_for_completion(&c->kobj_unregister);
125 ubifs_err(c, "cannot create sysfs entry for ubifs%d_%d, error %d\n",
126 c->vi.ubi_num, c->vi.vol_id, ret);
130 void ubifs_sysfs_unregister(struct ubifs_info *c)
132 kobject_del(&c->kobj);
133 kobject_put(&c->kobj);
134 wait_for_completion(&c->kobj_unregister);
139 int __init ubifs_sysfs_init(void)
143 kobject_set_name(&ubifs_kset.kobj, "ubifs");
144 ubifs_kset.kobj.parent = fs_kobj;
145 ret = kset_register(&ubifs_kset);
150 void ubifs_sysfs_exit(void)
152 kset_unregister(&ubifs_kset);