net: af_packet: 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: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Mike Maloney <maloney@google.com>
Cc: Jarno Rajahalme <jarno@ovn.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 4f4fa32..9603f6f 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -201,11 +201,8 @@ static void prb_retire_current_block(struct tpacket_kbdq_core *,
 static int prb_queue_frozen(struct tpacket_kbdq_core *);
 static void prb_open_block(struct tpacket_kbdq_core *,
                struct tpacket_block_desc *);
-static void prb_retire_rx_blk_timer_expired(unsigned long);
+static void prb_retire_rx_blk_timer_expired(struct timer_list *);
 static void _prb_refresh_rx_retire_blk_timer(struct tpacket_kbdq_core *);
-static void prb_init_blk_timer(struct packet_sock *,
-               struct tpacket_kbdq_core *,
-               void (*func) (unsigned long));
 static void prb_fill_rxhash(struct tpacket_kbdq_core *, struct tpacket3_hdr *);
 static void prb_clear_rxhash(struct tpacket_kbdq_core *,
                struct tpacket3_hdr *);
@@ -540,20 +537,14 @@ static void prb_shutdown_retire_blk_timer(struct packet_sock *po,
        prb_del_retire_blk_timer(pkc);
 }
 
-static void prb_init_blk_timer(struct packet_sock *po,
-               struct tpacket_kbdq_core *pkc,
-               void (*func) (unsigned long))
-{
-       setup_timer(&pkc->retire_blk_timer, func, (long)po);
-       pkc->retire_blk_timer.expires = jiffies;
-}
-
 static void prb_setup_retire_blk_timer(struct packet_sock *po)
 {
        struct tpacket_kbdq_core *pkc;
 
        pkc = GET_PBDQC_FROM_RB(&po->rx_ring);
-       prb_init_blk_timer(po, pkc, prb_retire_rx_blk_timer_expired);
+       timer_setup(&pkc->retire_blk_timer, prb_retire_rx_blk_timer_expired,
+                   0);
+       pkc->retire_blk_timer.expires = jiffies;
 }
 
 static int prb_calc_retire_blk_tmo(struct packet_sock *po,
@@ -671,9 +662,10 @@ static void _prb_refresh_rx_retire_blk_timer(struct tpacket_kbdq_core *pkc)
  * prb_calc_retire_blk_tmo() calculates the tmo.
  *
  */
-static void prb_retire_rx_blk_timer_expired(unsigned long data)
+static void prb_retire_rx_blk_timer_expired(struct timer_list *t)
 {
-       struct packet_sock *po = (struct packet_sock *)data;
+       struct packet_sock *po =
+               from_timer(po, t, rx_ring.prb_bdqc.retire_blk_timer);
        struct tpacket_kbdq_core *pkc = GET_PBDQC_FROM_RB(&po->rx_ring);
        unsigned int frozen;
        struct tpacket_block_desc *pbd;