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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/sunrpc/debugfs.c
..
..
@@ -1,5 +1,5 @@
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1
 // SPDX-License-Identifier: GPL-2.0
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-/**
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+/*
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3
  * debugfs interface for sunrpc
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  *
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  * (c) 2014 Jeff Layton <jlayton@primarydata.com>
..
..
@@ -11,7 +11,6 @@
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 #include "netns.h"
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12
 
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 static struct dentry *topdir;
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-static struct dentry *rpc_fault_dir;
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 static struct dentry *rpc_clnt_dir;
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 static struct dentry *rpc_xprt_dir;
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16
 
..
..
@@ -33,7 +32,7 @@
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32
 
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 	seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
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 		task->tk_pid, task->tk_flags, task->tk_status,
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-		clnt->cl_clid, xid, task->tk_timeout, task->tk_ops,
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+		clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops,
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 		clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),
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 		task->tk_action, rpc_waitq);
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 	return 0;
..
..
@@ -118,16 +117,37 @@
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 	.release	= tasks_release,
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 };
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119
 
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+static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *numv)
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+{
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+	int len;
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+	char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
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+	char link[9]; /* enough for 8 hex digits + NULL */
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+	int *nump = numv;
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+
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+	if (IS_ERR_OR_NULL(xprt->debugfs))
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+		return 0;
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+	len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
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+		       xprt->debugfs->d_name.name);
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+	if (len >= sizeof(name))
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+		return -1;
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+	if (*nump == 0)
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+		strcpy(link, "xprt");
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+	else {
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+		len = snprintf(link, sizeof(link), "xprt%d", *nump);
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+		if (len >= sizeof(link))
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+			return -1;
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+	}
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+	debugfs_create_symlink(link, clnt->cl_debugfs, name);
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+	(*nump)++;
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+	return 0;
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+}
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+
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 void
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146
 rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
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147
 {
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148
 	int len;
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-	char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
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-	struct rpc_xprt *xprt;
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-
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-	/* Already registered? */
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-	if (clnt->cl_debugfs || !rpc_clnt_dir)
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-		return;
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+	char name[9]; /* enough for 8 hex digits + NULL */
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+	int xprtnum = 0;
131
151
 
132
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 	len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
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153
 	if (len >= sizeof(name))
..
..
@@ -135,35 +155,12 @@
135
155
 
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 	/* make the per-client dir */
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157
 	clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
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-	if (!clnt->cl_debugfs)
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-		return;
140
158
 
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 	/* make tasks file */
142
-	if (!debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs,
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-				 clnt, &tasks_fops))
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-		goto out_err;
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+	debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs, clnt,
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+			    &tasks_fops);
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162
 
146
-	rcu_read_lock();
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-	xprt = rcu_dereference(clnt->cl_xprt);
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-	/* no "debugfs" dentry? Don't bother with the symlink. */
149
-	if (!xprt->debugfs) {
150
-		rcu_read_unlock();
151
-		return;
152
-	}
153
-	len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
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-			xprt->debugfs->d_name.name);
155
-	rcu_read_unlock();
156
-
157
-	if (len >= sizeof(name))
158
-		goto out_err;
159
-
160
-	if (!debugfs_create_symlink("xprt", clnt->cl_debugfs, name))
161
-		goto out_err;
162
-
163
-	return;
164
-out_err:
165
-	debugfs_remove_recursive(clnt->cl_debugfs);
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-	clnt->cl_debugfs = NULL;
163
+	rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum);
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164
 }
168
165
 
169
166
 void
..
..
@@ -226,9 +223,6 @@
226
223
 	static atomic_t	cur_id;
227
224
 	char		name[9]; /* 8 hex digits + NULL term */
228
225
 
229
-	if (!rpc_xprt_dir)
230
-		return;
231
-
232
226
 	id = (unsigned int)atomic_inc_return(&cur_id);
233
227
 
234
228
 	len = snprintf(name, sizeof(name), "%x", id);
..
..
@@ -237,15 +231,10 @@
237
231
 
238
232
 	/* make the per-client dir */
239
233
 	xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
240
-	if (!xprt->debugfs)
241
-		return;
242
234
 
243
235
 	/* make tasks file */
244
-	if (!debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs,
245
-				 xprt, &xprt_info_fops)) {
246
-		debugfs_remove_recursive(xprt->debugfs);
247
-		xprt->debugfs = NULL;
248
-	}
236
+	debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs, xprt,
237
+			    &xprt_info_fops);
249
238
 
250
239
 	atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
251
240
 }
..
..
@@ -308,28 +297,11 @@
308
297
 	.release	= fault_release,
309
298
 };
310
299
 
311
-static struct dentry *
312
-inject_fault_dir(struct dentry *topdir)
313
-{
314
-	struct dentry *faultdir;
315
-
316
-	faultdir = debugfs_create_dir("inject_fault", topdir);
317
-	if (!faultdir)
318
-		return NULL;
319
-
320
-	if (!debugfs_create_file("disconnect", S_IFREG | 0400, faultdir,
321
-				 NULL, &fault_disconnect_fops))
322
-		return NULL;
323
-
324
-	return faultdir;
325
-}
326
-
327
300
 void __exit
328
301
 sunrpc_debugfs_exit(void)
329
302
 {
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303
 	debugfs_remove_recursive(topdir);
331
304
 	topdir = NULL;
332
-	rpc_fault_dir = NULL;
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305
 	rpc_clnt_dir = NULL;
334
306
 	rpc_xprt_dir = NULL;
335
307
 }
..
..
@@ -337,26 +309,16 @@
337
309
 void __init
338
310
 sunrpc_debugfs_init(void)
339
311
 {
340
-	topdir = debugfs_create_dir("sunrpc", NULL);
341
-	if (!topdir)
342
-		return;
312
+	struct dentry *rpc_fault_dir;
343
313
 
344
-	rpc_fault_dir = inject_fault_dir(topdir);
345
-	if (!rpc_fault_dir)
346
-		goto out_remove;
314
+	topdir = debugfs_create_dir("sunrpc", NULL);
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315
 
348
316
 	rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
349
-	if (!rpc_clnt_dir)
350
-		goto out_remove;
351
317
 
352
318
 	rpc_xprt_dir = debugfs_create_dir("rpc_xprt", topdir);
353
-	if (!rpc_xprt_dir)
354
-		goto out_remove;
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319
 
356
-	return;
357
-out_remove:
358
-	debugfs_remove_recursive(topdir);
359
-	topdir = NULL;
360
-	rpc_fault_dir = NULL;
361
-	rpc_clnt_dir = NULL;
320
+	rpc_fault_dir = debugfs_create_dir("inject_fault", topdir);
321
+
322
+	debugfs_create_file("disconnect", S_IFREG | 0400, rpc_fault_dir, NULL,
323
+			    &fault_disconnect_fops);
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324
 }