net: sctp: 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: Vlad Yasevich <vyasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-sctp@vger.kernel.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/include/net/sctp/sm.h b/include/net/sctp/sm.h
index 2db3d3a..13cc496 100644 (file)
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -72,7 +72,7 @@ typedef enum sctp_disposition (sctp_state_fn_t) (
                                        const union sctp_subtype type,
                                        void *arg,
                                        struct sctp_cmd_seq *commands);
-typedef void (sctp_timer_event_t) (unsigned long);
+typedef void (sctp_timer_event_t) (struct timer_list *);
 struct sctp_sm_table_entry {
        sctp_state_fn_t *fn;
        const char *name;
@@ -314,10 +314,10 @@ int sctp_do_sm(struct net *net, enum sctp_event event_type,
               void *event_arg, gfp_t gfp);
 
 /* 2nd level prototypes */
-void sctp_generate_t3_rtx_event(unsigned long peer);
-void sctp_generate_heartbeat_event(unsigned long peer);
-void sctp_generate_reconf_event(unsigned long peer);
-void sctp_generate_proto_unreach_event(unsigned long peer);
+void sctp_generate_t3_rtx_event(struct timer_list *t);
+void sctp_generate_heartbeat_event(struct timer_list *t);
+void sctp_generate_reconf_event(struct timer_list *t);
+void sctp_generate_proto_unreach_event(struct timer_list *t);
 
 void sctp_ootb_pkt_free(struct sctp_packet *packet);
 

diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index dfb9651..69394f4 100644 (file)
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -149,8 +149,7 @@ static struct sctp_association *sctp_association_init(
 
        /* Initializes the timers */
        for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i)
-               setup_timer(&asoc->timers[i], sctp_timer_events[i],
-                               (unsigned long)asoc);
+               timer_setup(&asoc->timers[i], sctp_timer_events[i], 0);
 
        /* Pull default initialization values from the sock options.
         * Note: This assumes that the values have already been

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index fcd80fe..f5172c2 100644 (file)
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -622,9 +622,9 @@ static void sctp_v4_ecn_capable(struct sock *sk)
        INET_ECN_xmit(sk);
 }
 
-static void sctp_addr_wq_timeout_handler(unsigned long arg)
+static void sctp_addr_wq_timeout_handler(struct timer_list *t)
 {
-       struct net *net = (struct net *)arg;
+       struct net *net = from_timer(net, t, sctp.addr_wq_timer);
        struct sctp_sockaddr_entry *addrw, *temp;
        struct sctp_sock *sp;
 
@@ -1304,8 +1304,7 @@ static int __net_init sctp_defaults_init(struct net *net)
        INIT_LIST_HEAD(&net->sctp.auto_asconf_splist);
        spin_lock_init(&net->sctp.addr_wq_lock);
        net->sctp.addr_wq_timer.expires = 0;
-       setup_timer(&net->sctp.addr_wq_timer, sctp_addr_wq_timeout_handler,
-                   (unsigned long)net);
+       timer_setup(&net->sctp.addr_wq_timer, sctp_addr_wq_timeout_handler, 0);
 
        return 0;
 

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 402bfbb..1c2699b 100644 (file)
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -243,9 +243,10 @@ nomem:
 /* When the T3-RTX timer expires, it calls this function to create the
  * relevant state machine event.
  */
-void sctp_generate_t3_rtx_event(unsigned long peer)
+void sctp_generate_t3_rtx_event(struct timer_list *t)
 {
-       struct sctp_transport *transport = (struct sctp_transport *) peer;
+       struct sctp_transport *transport =
+               from_timer(transport, t, T3_rtx_timer);
        struct sctp_association *asoc = transport->asoc;
        struct sock *sk = asoc->base.sk;
        struct net *net = sock_net(sk);
@@ -319,50 +320,63 @@ out_unlock:
        sctp_association_put(asoc);
 }
 
-static void sctp_generate_t1_cookie_event(unsigned long data)
+static void sctp_generate_t1_cookie_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *) data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_T1_COOKIE]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_COOKIE);
 }
 
-static void sctp_generate_t1_init_event(unsigned long data)
+static void sctp_generate_t1_init_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *) data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_T1_INIT]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T1_INIT);
 }
 
-static void sctp_generate_t2_shutdown_event(unsigned long data)
+static void sctp_generate_t2_shutdown_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *) data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T2_SHUTDOWN);
 }
 
-static void sctp_generate_t4_rto_event(unsigned long data)
+static void sctp_generate_t4_rto_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *) data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_T4_RTO]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T4_RTO);
 }
 
-static void sctp_generate_t5_shutdown_guard_event(unsigned long data)
+static void sctp_generate_t5_shutdown_guard_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *)data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t,
+                          timers[SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD]);
+
        sctp_generate_timeout_event(asoc,
                                    SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD);
 
 } /* sctp_generate_t5_shutdown_guard_event() */
 
-static void sctp_generate_autoclose_event(unsigned long data)
+static void sctp_generate_autoclose_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *) data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_AUTOCLOSE]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_AUTOCLOSE);
 }
 
 /* Generate a heart beat event.  If the sock is busy, reschedule.   Make
  * sure that the transport is still valid.
  */
-void sctp_generate_heartbeat_event(unsigned long data)
+void sctp_generate_heartbeat_event(struct timer_list *t)
 {
-       struct sctp_transport *transport = (struct sctp_transport *) data;
+       struct sctp_transport *transport = from_timer(transport, t, hb_timer);
        struct sctp_association *asoc = transport->asoc;
        struct sock *sk = asoc->base.sk;
        struct net *net = sock_net(sk);
@@ -405,9 +419,10 @@ out_unlock:
 /* Handle the timeout of the ICMP protocol unreachable timer.  Trigger
  * the correct state machine transition that will close the association.
  */
-void sctp_generate_proto_unreach_event(unsigned long data)
+void sctp_generate_proto_unreach_event(struct timer_list *t)
 {
-       struct sctp_transport *transport = (struct sctp_transport *)data;
+       struct sctp_transport *transport =
+               from_timer(transport, t, proto_unreach_timer);
        struct sctp_association *asoc = transport->asoc;
        struct sock *sk = asoc->base.sk;
        struct net *net = sock_net(sk);
@@ -439,9 +454,10 @@ out_unlock:
 }
 
  /* Handle the timeout of the RE-CONFIG timer. */
-void sctp_generate_reconf_event(unsigned long data)
+void sctp_generate_reconf_event(struct timer_list *t)
 {
-       struct sctp_transport *transport = (struct sctp_transport *)data;
+       struct sctp_transport *transport =
+               from_timer(transport, t, reconf_timer);
        struct sctp_association *asoc = transport->asoc;
        struct sock *sk = asoc->base.sk;
        struct net *net = sock_net(sk);
@@ -471,24 +487,27 @@ out_unlock:
 }
 
 /* Inject a SACK Timeout event into the state machine.  */
-static void sctp_generate_sack_event(unsigned long data)
+static void sctp_generate_sack_event(struct timer_list *t)
 {
-       struct sctp_association *asoc = (struct sctp_association *)data;
+       struct sctp_association *asoc =
+               from_timer(asoc, t, timers[SCTP_EVENT_TIMEOUT_SACK]);
+
        sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_SACK);
 }
 
 sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES] = {
-       NULL,
-       sctp_generate_t1_cookie_event,
-       sctp_generate_t1_init_event,
-       sctp_generate_t2_shutdown_event,
-       NULL,
-       sctp_generate_t4_rto_event,
-       sctp_generate_t5_shutdown_guard_event,
-       NULL,
-       NULL,
-       sctp_generate_sack_event,
-       sctp_generate_autoclose_event,
+       [SCTP_EVENT_TIMEOUT_NONE] =             NULL,
+       [SCTP_EVENT_TIMEOUT_T1_COOKIE] =        sctp_generate_t1_cookie_event,
+       [SCTP_EVENT_TIMEOUT_T1_INIT] =          sctp_generate_t1_init_event,
+       [SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] =      sctp_generate_t2_shutdown_event,
+       [SCTP_EVENT_TIMEOUT_T3_RTX] =           NULL,
+       [SCTP_EVENT_TIMEOUT_T4_RTO] =           sctp_generate_t4_rto_event,
+       [SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD] =
+                                       sctp_generate_t5_shutdown_guard_event,
+       [SCTP_EVENT_TIMEOUT_HEARTBEAT] =        NULL,
+       [SCTP_EVENT_TIMEOUT_RECONF] =           NULL,
+       [SCTP_EVENT_TIMEOUT_SACK] =             sctp_generate_sack_event,
+       [SCTP_EVENT_TIMEOUT_AUTOCLOSE] =        sctp_generate_autoclose_event,
 };
 
 

diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 2d9bd37..1e5a224 100644 (file)
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -87,14 +87,11 @@ static struct sctp_transport *sctp_transport_init(struct net *net,
        INIT_LIST_HEAD(&peer->send_ready);
        INIT_LIST_HEAD(&peer->transports);
 
-       setup_timer(&peer->T3_rtx_timer, sctp_generate_t3_rtx_event,
-                   (unsigned long)peer);
-       setup_timer(&peer->hb_timer, sctp_generate_heartbeat_event,
-                   (unsigned long)peer);
-       setup_timer(&peer->reconf_timer, sctp_generate_reconf_event,
-                   (unsigned long)peer);
-       setup_timer(&peer->proto_unreach_timer,
-                   sctp_generate_proto_unreach_event, (unsigned long)peer);
+       timer_setup(&peer->T3_rtx_timer, sctp_generate_t3_rtx_event, 0);
+       timer_setup(&peer->hb_timer, sctp_generate_heartbeat_event, 0);
+       timer_setup(&peer->reconf_timer, sctp_generate_reconf_event, 0);
+       timer_setup(&peer->proto_unreach_timer,
+                   sctp_generate_proto_unreach_event, 0);
 
        /* Initialize the 64-bit random nonce sent with heartbeat. */
        get_random_bytes(&peer->hb_nonce, sizeof(peer->hb_nonce));