linux-kernel - [PATCH] ksmbd: Convert to use sysfs_emit()/sysfs_emit

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Message-ID: <202212070929276734686@zte.com.cn>
Date:   Wed, 7 Dec 2022 09:29:27 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <linkinjeon@...nel.org>
Cc:     <sfrench@...ba.org>, <senozhatsky@...omium.org>, <tom@...pey.com>,
        <linux-cifs@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] ksmbd: Convert to use sysfs_emit()/sysfs_emit_at() APIs

From: ye xingchen <ye.xingchen@....com.cn>

Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
---
 fs/ksmbd/server.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/fs/ksmbd/server.c b/fs/ksmbd/server.c
index a0d635304754..394b6ceac431 100644
--- a/fs/ksmbd/server.c
+++ b/fs/ksmbd/server.c
@@ -432,11 +432,9 @@ static ssize_t stats_show(struct class *class, struct class_attribute *attr,
 		"reset",
 		"shutdown"
 	};
-
-	ssize_t sz = scnprintf(buf, PAGE_SIZE, "%d %s %d %lu\n", stats_version,
-			       state[server_conf.state], server_conf.tcp_port,
-			       server_conf.ipc_last_active / HZ);
-	return sz;
+	return sysfs_emit(buf, "%d %s %d %lu\n", stats_version,
+			  state[server_conf.state], server_conf.tcp_port,
+			  server_conf.ipc_last_active / HZ);
 }

 static ssize_t kill_server_store(struct class *class,
@@ -468,19 +466,13 @@ static ssize_t debug_show(struct class *class, struct class_attribute *attr,

 	for (i = 0; i < ARRAY_SIZE(debug_type_strings); i++) {
 		if ((ksmbd_debug_types >> i) & 1) {
-			pos = scnprintf(buf + sz,
-					PAGE_SIZE - sz,
-					"[%s] ",
-					debug_type_strings[i]);
+			pos = sysfs_emit_at(buf, sz, "[%s] ", debug_type_strings[i]);
 		} else {
-			pos = scnprintf(buf + sz,
-					PAGE_SIZE - sz,
-					"%s ",
-					debug_type_strings[i]);
+			pos = sysfs_emit_at(buf, sz, "%s ", debug_type_strings[i]);
 		}
 		sz += pos;
 	}
-	sz += scnprintf(buf + sz, PAGE_SIZE - sz, "\n");
+	sz += sysfs_emit_at(buf, sz, "\n");
 	return sz;
 }

-- 
2.25.1