add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/autofs/waitq.c
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@@ -1,10 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
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  * Copyright 2001-2006 Ian Kent <raven@themaw.net>
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- *
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- * This file is part of the Linux kernel and is made available under
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- * the terms of the GNU General Public License, version 2, or at your
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- * option, any later version, incorporated herein by reference.
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  */
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 #include <linux/sched/signal.h>
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@@ -20,14 +17,14 @@
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 	struct autofs_wait_queue *wq, *nwq;
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 	mutex_lock(&sbi->wq_mutex);
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-	if (sbi->catatonic) {
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+	if (sbi->flags & AUTOFS_SBI_CATATONIC) {
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 		mutex_unlock(&sbi->wq_mutex);
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 		return;
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 	}
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 	pr_debug("entering catatonic mode\n");
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-	sbi->catatonic = 1;
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+	sbi->flags |= AUTOFS_SBI_CATATONIC;
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 	wq = sbi->queues;
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 	sbi->queues = NULL;	/* Erase all wait queues */
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 	while (wq) {
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@@ -35,8 +32,9 @@
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 		wq->status = -ENOENT; /* Magic is gone - report failure */
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 		kfree(wq->name.name);
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 		wq->name.name = NULL;
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-		wq->wait_ctr--;
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 		wake_up_interruptible(&wq->queue);
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+		if (!--wq->wait_ctr)
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+			kfree(wq);
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 		wq = nwq;
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 	}
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 	fput(sbi->pipe);	/* Close the pipe */
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@@ -56,7 +54,7 @@
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 	mutex_lock(&sbi->pipe_mutex);
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 	while (bytes) {
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-		wr = __kernel_write(file, data, bytes, &file->f_pos);
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+		wr = __kernel_write(file, data, bytes, NULL);
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 		if (wr <= 0)
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 			break;
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 		data += wr;
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@@ -255,7 +253,7 @@
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 	struct autofs_wait_queue *wq;
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 	struct autofs_info *ino;
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-	if (sbi->catatonic)
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+	if (sbi->flags & AUTOFS_SBI_CATATONIC)
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 		return -ENOENT;
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 	/* Wait in progress, continue; */
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@@ -290,7 +288,7 @@
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 			if (mutex_lock_interruptible(&sbi->wq_mutex))
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 				return -EINTR;
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-			if (sbi->catatonic)
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+			if (sbi->flags & AUTOFS_SBI_CATATONIC)
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 				return -ENOENT;
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 			wq = autofs_find_wait(sbi, qstr);
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@@ -359,7 +357,7 @@
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 	pid_t tgid;
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 	/* In catatonic mode, we don't wait for nobody */
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-	if (sbi->catatonic)
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+	if (sbi->flags & AUTOFS_SBI_CATATONIC)
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 		return -ENOENT;
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 	/*