linux-kernel - [PATCH] fs/ncpfs: Convert timers to use timer

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Message-ID: <20171005005250.GA23654@beast>
Date:   Wed, 4 Oct 2017 17:52:50 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Petr Vandrovec <petr@...drovec.name>, Jan Kara <jack@...e.cz>,
        Jens Axboe <axboe@...com>, Al Viro <viro@...iv.linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] fs/ncpfs: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Petr Vandrovec <petr@...drovec.name>
Cc: Jan Kara <jack@...e.cz>
Cc: Jens Axboe <axboe@...com>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 fs/ncpfs/inode.c     | 4 +---
 fs/ncpfs/ncp_fs_sb.h | 2 +-
 fs/ncpfs/sock.c      | 6 +++---
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 6d0f14c86099..129f1937fa2c 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -618,7 +618,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
 	server->tx.creq		= NULL;
 	server->rcv.creq	= NULL;
 
-	init_timer(&server->timeout_tm);
+	timer_setup(&server->timeout_tm, ncpdgram_timeout_call, 0);
 #undef NCP_PACKET_SIZE
 #define NCP_PACKET_SIZE 131072
 	error = -ENOMEM;
@@ -650,8 +650,6 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
 	} else {
 		INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc);
 		INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc);
-		server->timeout_tm.data = (unsigned long)server;
-		server->timeout_tm.function = ncpdgram_timeout_call;
 	}
 	release_sock(sock->sk);
 
diff --git a/fs/ncpfs/ncp_fs_sb.h b/fs/ncpfs/ncp_fs_sb.h
index 366fd63cc506..2088d94ead93 100644
--- a/fs/ncpfs/ncp_fs_sb.h
+++ b/fs/ncpfs/ncp_fs_sb.h
@@ -149,7 +149,7 @@ extern void ncp_tcp_rcv_proc(struct work_struct *work);
 extern void ncp_tcp_tx_proc(struct work_struct *work);
 extern void ncpdgram_rcv_proc(struct work_struct *work);
 extern void ncpdgram_timeout_proc(struct work_struct *work);
-extern void ncpdgram_timeout_call(unsigned long server);
+extern void ncpdgram_timeout_call(struct timer_list *t);
 extern void ncp_tcp_data_ready(struct sock* sk);
 extern void ncp_tcp_write_space(struct sock* sk);
 extern void ncp_tcp_error_report(struct sock* sk);
diff --git a/fs/ncpfs/sock.c b/fs/ncpfs/sock.c
index 98b6db0ed63e..56c45c78b0b8 100644
--- a/fs/ncpfs/sock.c
+++ b/fs/ncpfs/sock.c
@@ -116,10 +116,10 @@ void ncp_tcp_write_space(struct sock *sk)
 		schedule_work(&server->tx.tq);
 }
 
-void ncpdgram_timeout_call(unsigned long v)
+void ncpdgram_timeout_call(struct timer_list *t)
 {
-	struct ncp_server *server = (void*)v;
-	
+	struct ncp_server *server = from_timer(server, t, timeout_tm);
+
 	schedule_work(&server->timeout_tq);
 }
 
-- 
2.7.4


-- 
Kees Cook
Pixel Security