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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/net/6lowpan/debugfs.c
....@@ -1,11 +1,5 @@
1
-/* This program is free software; you can redistribute it and/or modify
2
- * it under the terms of the GNU General Public License version 2
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- * as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
1
+// SPDX-License-Identifier: GPL-2.0-only
2
+/*
93  *
104  * Authors:
115  * (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
....@@ -41,9 +35,9 @@
4135 	return 0;
4236 }
4337 
44
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_active_fops,
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-			lowpan_ctx_flag_active_get,
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-			lowpan_ctx_flag_active_set, "%llu\n");
38
+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_active_fops,
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+			 lowpan_ctx_flag_active_get,
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+			 lowpan_ctx_flag_active_set, "%llu\n");
4741 
4842 static int lowpan_ctx_flag_c_set(void *data, u64 val)
4943 {
....@@ -66,8 +60,8 @@
6660 	return 0;
6761 }
6862 
69
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
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-			lowpan_ctx_flag_c_set, "%llu\n");
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+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_flag_c_fops, lowpan_ctx_flag_c_get,
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+			 lowpan_ctx_flag_c_set, "%llu\n");
7165 
7266 static int lowpan_ctx_plen_set(void *data, u64 val)
7367 {
....@@ -97,8 +91,8 @@
9791 	return 0;
9892 }
9993 
100
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
101
-			lowpan_ctx_plen_set, "%llu\n");
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+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_ctx_plen_fops, lowpan_ctx_plen_get,
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+			 lowpan_ctx_plen_set, "%llu\n");
10296 
10397 static int lowpan_ctx_pfx_show(struct seq_file *file, void *offset)
10498 {
....@@ -169,46 +163,31 @@
169163 	.release	= single_release,
170164 };
171165 
172
-static int lowpan_dev_debugfs_ctx_init(struct net_device *dev,
173
-				       struct dentry *ctx, u8 id)
166
+static void lowpan_dev_debugfs_ctx_init(struct net_device *dev,
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+					struct dentry *ctx, u8 id)
174168 {
175169 	struct lowpan_dev *ldev = lowpan_dev(dev);
176
-	struct dentry *dentry, *root;
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+	struct dentry *root;
177171 	char buf[32];
178172 
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-	WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE);
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+	if (WARN_ON_ONCE(id >= LOWPAN_IPHC_CTX_TABLE_SIZE))
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+		return;
180175 
181176 	sprintf(buf, "%d", id);
182177 
183178 	root = debugfs_create_dir(buf, ctx);
184
-	if (!root)
185
-		return -EINVAL;
186179 
187
-	dentry = debugfs_create_file("active", 0644, root,
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-				     &ldev->ctx.table[id],
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-				     &lowpan_ctx_flag_active_fops);
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-	if (!dentry)
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-		return -EINVAL;
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+	debugfs_create_file("active", 0644, root, &ldev->ctx.table[id],
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+			    &lowpan_ctx_flag_active_fops);
192182 
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-	dentry = debugfs_create_file("compression", 0644, root,
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-				     &ldev->ctx.table[id],
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-				     &lowpan_ctx_flag_c_fops);
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-	if (!dentry)
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-		return -EINVAL;
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+	debugfs_create_file("compression", 0644, root, &ldev->ctx.table[id],
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+			    &lowpan_ctx_flag_c_fops);
198185 
199
-	dentry = debugfs_create_file("prefix", 0644, root,
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-				     &ldev->ctx.table[id],
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-				     &lowpan_ctx_pfx_fops);
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-	if (!dentry)
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-		return -EINVAL;
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+	debugfs_create_file("prefix", 0644, root, &ldev->ctx.table[id],
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+			    &lowpan_ctx_pfx_fops);
204188 
205
-	dentry = debugfs_create_file("prefix_len", 0644, root,
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-				     &ldev->ctx.table[id],
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-				     &lowpan_ctx_plen_fops);
208
-	if (!dentry)
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-		return -EINVAL;
210
-
211
-	return 0;
189
+	debugfs_create_file("prefix_len", 0644, root, &ldev->ctx.table[id],
190
+			    &lowpan_ctx_plen_fops);
212191 }
213192 
214193 static int lowpan_context_show(struct seq_file *file, void *offset)
....@@ -232,18 +211,7 @@
232211 
233212 	return 0;
234213 }
235
-
236
-static int lowpan_context_open(struct inode *inode, struct file *file)
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-{
238
-	return single_open(file, lowpan_context_show, inode->i_private);
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-}
240
-
241
-static const struct file_operations lowpan_context_fops = {
242
-	.open		= lowpan_context_open,
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-	.read		= seq_read,
244
-	.llseek		= seq_lseek,
245
-	.release	= single_release,
246
-};
214
+DEFINE_SHOW_ATTRIBUTE(lowpan_context);
247215 
248216 static int lowpan_short_addr_get(void *data, u64 *val)
249217 {
....@@ -256,67 +224,42 @@
256224 	return 0;
257225 }
258226 
259
-DEFINE_SIMPLE_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get,
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-			NULL, "0x%04llx\n");
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+DEFINE_DEBUGFS_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get, NULL,
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+			 "0x%04llx\n");
261229 
262
-static int lowpan_dev_debugfs_802154_init(const struct net_device *dev,
230
+static void lowpan_dev_debugfs_802154_init(const struct net_device *dev,
263231 					  struct lowpan_dev *ldev)
264232 {
265
-	struct dentry *dentry, *root;
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+	struct dentry *root;
266234 
267235 	if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154))
268
-		return 0;
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+		return;
269237 
270238 	root = debugfs_create_dir("ieee802154", ldev->iface_debugfs);
271
-	if (!root)
272
-		return -EINVAL;
273239 
274
-	dentry = debugfs_create_file("short_addr", 0444, root,
275
-				     lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
276
-				     &lowpan_short_addr_fops);
277
-	if (!dentry)
278
-		return -EINVAL;
279
-
280
-	return 0;
240
+	debugfs_create_file("short_addr", 0444, root,
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+			    lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
242
+			    &lowpan_short_addr_fops);
281243 }
282244 
283
-int lowpan_dev_debugfs_init(struct net_device *dev)
245
+void lowpan_dev_debugfs_init(struct net_device *dev)
284246 {
285247 	struct lowpan_dev *ldev = lowpan_dev(dev);
286
-	struct dentry *contexts, *dentry;
287
-	int ret, i;
248
+	struct dentry *contexts;
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+	int i;
288250 
289251 	/* creating the root */
290252 	ldev->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs);
291
-	if (!ldev->iface_debugfs)
292
-		goto fail;
293253 
294254 	contexts = debugfs_create_dir("contexts", ldev->iface_debugfs);
295
-	if (!contexts)
296
-		goto remove_root;
297255 
298
-	dentry = debugfs_create_file("show", 0644, contexts,
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-				     &lowpan_dev(dev)->ctx,
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-				     &lowpan_context_fops);
301
-	if (!dentry)
302
-		goto remove_root;
256
+	debugfs_create_file("show", 0644, contexts, &lowpan_dev(dev)->ctx,
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+			    &lowpan_context_fops);
303258 
304
-	for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++) {
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-		ret = lowpan_dev_debugfs_ctx_init(dev, contexts, i);
306
-		if (ret < 0)
307
-			goto remove_root;
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-	}
259
+	for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
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+		lowpan_dev_debugfs_ctx_init(dev, contexts, i);
309261 
310
-	ret = lowpan_dev_debugfs_802154_init(dev, ldev);
311
-	if (ret < 0)
312
-		goto remove_root;
313
-
314
-	return 0;
315
-
316
-remove_root:
317
-	lowpan_dev_debugfs_exit(dev);
318
-fail:
319
-	return -EINVAL;
262
+	lowpan_dev_debugfs_802154_init(dev, ldev);
320263 }
321264 
322265 void lowpan_dev_debugfs_exit(struct net_device *dev)
....@@ -324,13 +267,9 @@
324267 	debugfs_remove_recursive(lowpan_dev(dev)->iface_debugfs);
325268 }
326269 
327
-int __init lowpan_debugfs_init(void)
270
+void __init lowpan_debugfs_init(void)
328271 {
329272 	lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
330
-	if (!lowpan_debugfs)
331
-		return -EINVAL;
332
-
333
-	return 0;
334273 }
335274 
336275 void lowpan_debugfs_exit(void)