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Date: Fri, 23 Feb 2024 17:14:31 -0800
Subject: [PATCH 03/10] bcachefs: thread_with_stdio: kill
 thread_with_stdio_done()
From: "Darrick J. Wong" <djwong@kernel.org>
To: akpm@linux-foundation.org, daniel@gluo.nz, kent.overstreet@linux.dev,
 djwong@kernel.org
Cc: linux-xfs@vger.kernel.org, linux-bcachefs@vger.kernel.org,
 linux-kernel@vger.kernel.org
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From: Kent Overstreet <kent.overstreet@linux.dev>

Move the cleanup code to a wrapper function, where we can call it after
the thread_with_stdio fn exits.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/bcachefs/chardev.c          |   14 ++++----------
 fs/bcachefs/thread_with_file.c |   20 +++++++++++++++++---
 fs/bcachefs/thread_with_file.h |   11 ++---------
 3 files changed, 23 insertions(+), 22 deletions(-)


diff --git a/fs/bcachefs/chardev.c b/fs/bcachefs/chardev.c
index 226b39c176673..11711f54057e1 100644
--- a/fs/bcachefs/chardev.c
+++ b/fs/bcachefs/chardev.c
@@ -155,17 +155,14 @@ static void bch2_fsck_thread_exit(struct thread_with_stdio *_thr)
 	kfree(thr);
 }
 
-static int bch2_fsck_offline_thread_fn(void *arg)
+static void bch2_fsck_offline_thread_fn(struct thread_with_stdio *stdio)
 {
-	struct fsck_thread *thr = container_of(arg, struct fsck_thread, thr);
+	struct fsck_thread *thr = container_of(stdio, struct fsck_thread, thr);
 	struct bch_fs *c = bch2_fs_open(thr->devs, thr->nr_devs, thr->opts);
 
 	thr->thr.thr.ret = PTR_ERR_OR_ZERO(c);
 	if (!thr->thr.thr.ret)
 		bch2_fs_stop(c);
-
-	thread_with_stdio_done(&thr->thr);
-	return 0;
 }
 
 static long bch2_ioctl_fsck_offline(struct bch_ioctl_fsck_offline __user *user_arg)
@@ -763,9 +760,9 @@ static long bch2_ioctl_disk_resize_journal(struct bch_fs *c,
 	return ret;
 }
 
-static int bch2_fsck_online_thread_fn(void *arg)
+static void bch2_fsck_online_thread_fn(struct thread_with_stdio *stdio)
 {
-	struct fsck_thread *thr = container_of(arg, struct fsck_thread, thr);
+	struct fsck_thread *thr = container_of(stdio, struct fsck_thread, thr);
 	struct bch_fs *c = thr->c;
 
 	c->stdio_filter = current;
@@ -793,11 +790,8 @@ static int bch2_fsck_online_thread_fn(void *arg)
 	c->stdio_filter = NULL;
 	c->opts.fix_errors = old_fix_errors;
 
-	thread_with_stdio_done(&thr->thr);
-
 	up(&c->online_fsck_mutex);
 	bch2_ro_ref_put(c);
-	return 0;
 }
 
 static long bch2_ioctl_fsck_online(struct bch_fs *c,
diff --git a/fs/bcachefs/thread_with_file.c b/fs/bcachefs/thread_with_file.c
index ca81d3fec3eef..eb8ab4c47a94b 100644
--- a/fs/bcachefs/thread_with_file.c
+++ b/fs/bcachefs/thread_with_file.c
@@ -228,15 +228,29 @@ static const struct file_operations thread_with_stdio_fops = {
 	.release	= thread_with_stdio_release,
 };
 
+static int thread_with_stdio_fn(void *arg)
+{
+	struct thread_with_stdio *thr = arg;
+
+	thr->fn(thr);
+
+	thr->thr.done = true;
+	thr->stdio.done = true;
+	wake_up(&thr->stdio.input.wait);
+	wake_up(&thr->stdio.output.wait);
+	return 0;
+}
+
 int bch2_run_thread_with_stdio(struct thread_with_stdio *thr,
 			       void (*exit)(struct thread_with_stdio *),
-			       int (*fn)(void *))
+			       void (*fn)(struct thread_with_stdio *))
 {
 	stdio_buf_init(&thr->stdio.input);
 	stdio_buf_init(&thr->stdio.output);
-	thr->exit = exit;
+	thr->exit	= exit;
+	thr->fn		= fn;
 
-	return bch2_run_thread_with_file(&thr->thr, &thread_with_stdio_fops, fn);
+	return bch2_run_thread_with_file(&thr->thr, &thread_with_stdio_fops, thread_with_stdio_fn);
 }
 
 int bch2_stdio_redirect_read(struct stdio_redirect *stdio, char *ubuf, size_t len)
diff --git a/fs/bcachefs/thread_with_file.h b/fs/bcachefs/thread_with_file.h
index 4243c7c5ad3f3..66212fcae226a 100644
--- a/fs/bcachefs/thread_with_file.h
+++ b/fs/bcachefs/thread_with_file.h
@@ -21,19 +21,12 @@ struct thread_with_stdio {
 	struct thread_with_file	thr;
 	struct stdio_redirect	stdio;
 	void			(*exit)(struct thread_with_stdio *);
+	void			(*fn)(struct thread_with_stdio *);
 };
 
-static inline void thread_with_stdio_done(struct thread_with_stdio *thr)
-{
-	thr->thr.done = true;
-	thr->stdio.done = true;
-	wake_up(&thr->stdio.input.wait);
-	wake_up(&thr->stdio.output.wait);
-}
-
 int bch2_run_thread_with_stdio(struct thread_with_stdio *,
 			       void (*exit)(struct thread_with_stdio *),
-			       int (*fn)(void *));
+			       void (*fn)(struct thread_with_stdio *));
 int bch2_stdio_redirect_read(struct stdio_redirect *, char *, size_t);
 int bch2_stdio_redirect_readline(struct stdio_redirect *, char *, size_t);