inet/connection_sock: 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: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: netdev@vger.kernel.org
Cc: dccp@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 13e4c89..0358745 100644 (file)
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -169,9 +169,9 @@ enum inet_csk_ack_state_t {
 };
 
 void inet_csk_init_xmit_timers(struct sock *sk,
-                              void (*retransmit_handler)(unsigned long),
-                              void (*delack_handler)(unsigned long),
-                              void (*keepalive_handler)(unsigned long));
+                              void (*retransmit_handler)(struct timer_list *),
+                              void (*delack_handler)(struct timer_list *),
+                              void (*keepalive_handler)(struct timer_list *));
 void inet_csk_clear_xmit_timers(struct sock *sk);
 
 static inline void inet_csk_schedule_ack(struct sock *sk)

diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index 3a2c340..1e35526 100644 (file)
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -125,10 +125,11 @@ static void dccp_retransmit_timer(struct sock *sk)
                __sk_dst_reset(sk);
 }
 
-static void dccp_write_timer(unsigned long data)
+static void dccp_write_timer(struct timer_list *t)
 {
-       struct sock *sk = (struct sock *)data;
-       struct inet_connection_sock *icsk = inet_csk(sk);
+       struct inet_connection_sock *icsk =
+                       from_timer(icsk, t, icsk_retransmit_timer);
+       struct sock *sk = &icsk->icsk_inet.sk;
        int event = 0;
 
        bh_lock_sock(sk);
@@ -161,19 +162,20 @@ out:
        sock_put(sk);
 }
 
-static void dccp_keepalive_timer(unsigned long data)
+static void dccp_keepalive_timer(struct timer_list *t)
 {
-       struct sock *sk = (struct sock *)data;
+       struct sock *sk = from_timer(sk, t, sk_timer);
 
        pr_err("dccp should not use a keepalive timer !\n");
        sock_put(sk);
 }
 
 /* This is the same as tcp_delack_timer, sans prequeue & mem_reclaim stuff */
-static void dccp_delack_timer(unsigned long data)
+static void dccp_delack_timer(struct timer_list *t)
 {
-       struct sock *sk = (struct sock *)data;
-       struct inet_connection_sock *icsk = inet_csk(sk);
+       struct inet_connection_sock *icsk =
+                       from_timer(icsk, t, icsk_delack_timer);
+       struct sock *sk = &icsk->icsk_inet.sk;
 
        bh_lock_sock(sk);
        if (sock_owned_by_user(sk)) {

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 8a91ebb..5c965ec 100644 (file)
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -494,17 +494,15 @@ EXPORT_SYMBOL(inet_csk_accept);
  * to optimize.
  */
 void inet_csk_init_xmit_timers(struct sock *sk,
-                              void (*retransmit_handler)(unsigned long),
-                              void (*delack_handler)(unsigned long),
-                              void (*keepalive_handler)(unsigned long))
+                              void (*retransmit_handler)(struct timer_list *t),
+                              void (*delack_handler)(struct timer_list *t),
+                              void (*keepalive_handler)(struct timer_list *t))
 {
        struct inet_connection_sock *icsk = inet_csk(sk);
 
-       setup_timer(&icsk->icsk_retransmit_timer, retransmit_handler,
-                       (unsigned long)sk);
-       setup_timer(&icsk->icsk_delack_timer, delack_handler,
-                       (unsigned long)sk);
-       setup_timer(&sk->sk_timer, keepalive_handler, (unsigned long)sk);
+       timer_setup(&icsk->icsk_retransmit_timer, retransmit_handler, 0);
+       timer_setup(&icsk->icsk_delack_timer, delack_handler, 0);
+       timer_setup(&sk->sk_timer, keepalive_handler, 0);
        icsk->icsk_pending = icsk->icsk_ack.pending = 0;
 }
 EXPORT_SYMBOL(inet_csk_init_xmit_timers);
@@ -676,9 +674,9 @@ void inet_csk_reqsk_queue_drop_and_put(struct sock *sk, struct request_sock *req
 }
 EXPORT_SYMBOL(inet_csk_reqsk_queue_drop_and_put);
 
-static void reqsk_timer_handler(unsigned long data)
+static void reqsk_timer_handler(struct timer_list *t)
 {
-       struct request_sock *req = (struct request_sock *)data;
+       struct request_sock *req = from_timer(req, t, rsk_timer);
        struct sock *sk_listener = req->rsk_listener;
        struct net *net = sock_net(sk_listener);
        struct inet_connection_sock *icsk = inet_csk(sk_listener);
@@ -749,8 +747,7 @@ static void reqsk_queue_hash_req(struct request_sock *req,
        req->num_timeout = 0;
        req->sk = NULL;
 
-       setup_pinned_timer(&req->rsk_timer, reqsk_timer_handler,
-                           (unsigned long)req);
+       timer_setup(&req->rsk_timer, reqsk_timer_handler, TIMER_PINNED);
        mod_timer(&req->rsk_timer, jiffies + timeout);
 
        inet_ehash_insert(req_to_sk(req), NULL);

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 7014cc0..804a8d3 100644 (file)
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -288,15 +288,17 @@ out:
  *
  *  Returns: Nothing (void)
  */
-static void tcp_delack_timer(unsigned long data)
+static void tcp_delack_timer(struct timer_list *t)
 {
-       struct sock *sk = (struct sock *)data;
+       struct inet_connection_sock *icsk =
+                       from_timer(icsk, t, icsk_delack_timer);
+       struct sock *sk = &icsk->icsk_inet.sk;
 
        bh_lock_sock(sk);
        if (!sock_owned_by_user(sk)) {
                tcp_delack_timer_handler(sk);
        } else {
-               inet_csk(sk)->icsk_ack.blocked = 1;
+               icsk->icsk_ack.blocked = 1;
                __NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED);
                /* deleguate our work to tcp_release_cb() */
                if (!test_and_set_bit(TCP_DELACK_TIMER_DEFERRED, &sk->sk_tsq_flags))
@@ -576,9 +578,11 @@ out:
        sk_mem_reclaim(sk);
 }
 
-static void tcp_write_timer(unsigned long data)
+static void tcp_write_timer(struct timer_list *t)
 {
-       struct sock *sk = (struct sock *)data;
+       struct inet_connection_sock *icsk =
+                       from_timer(icsk, t, icsk_retransmit_timer);
+       struct sock *sk = &icsk->icsk_inet.sk;
 
        bh_lock_sock(sk);
        if (!sock_owned_by_user(sk)) {
@@ -613,9 +617,9 @@ void tcp_set_keepalive(struct sock *sk, int val)
 EXPORT_SYMBOL_GPL(tcp_set_keepalive);
 
 
-static void tcp_keepalive_timer (unsigned long data)
+static void tcp_keepalive_timer (struct timer_list *t)
 {
-       struct sock *sk = (struct sock *) data;
+       struct sock *sk = from_timer(sk, t, sk_timer);
        struct inet_connection_sock *icsk = inet_csk(sk);
        struct tcp_sock *tp = tcp_sk(sk);
        u32 elapsed;