From 9f12a77e467b8ec0296cf1c3481447e1b1811f59 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Mon, 16 Oct 2017 17:29:21 -0700 Subject: net/core: Collapse redundant sk_timer callback data assignments The core sk_timer initializer can provide the common .data assignment instead of it being set separately in users. Cc: "David S. Miller" Cc: Ralf Baechle Cc: Andrew Hendry Cc: Eric Dumazet Cc: Paolo Abeni Cc: David Howells Cc: Colin Ian King Cc: Ingo Molnar Cc: linzhang Cc: netdev@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-x25@vger.kernel.org Signed-off-by: Kees Cook Signed-off-by: David S. Miller --- net/netrom/nr_timer.c | 1 - 1 file changed, 1 deletion(-) (limited to 'net/netrom') diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c index 94d05806a9a2..f84ce71f1f5f 100644 --- a/net/netrom/nr_timer.c +++ b/net/netrom/nr_timer.c @@ -45,7 +45,6 @@ void nr_init_timers(struct sock *sk) setup_timer(&nr->idletimer, nr_idletimer_expiry, (unsigned long)sk); /* initialized by sock_init_data */ - sk->sk_timer.data = (unsigned long)sk; sk->sk_timer.function = &nr_heartbeat_expiry; } -- cgit v1.2.3 From 99767f278ccf74a1857069bb3eec991e572f94cd Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Mon, 16 Oct 2017 17:29:36 -0700 Subject: net/core: Convert sk_timer users 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 for all users of sk_timer. Cc: "David S. Miller" Cc: Ralf Baechle Cc: Andrew Hendry Cc: Eric Dumazet Cc: Paolo Abeni Cc: David Howells Cc: Julia Lawall Cc: linzhang Cc: Ingo Molnar Cc: netdev@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-x25@vger.kernel.org Signed-off-by: Kees Cook Signed-off-by: David S. Miller --- net/netrom/af_netrom.c | 6 +++--- net/netrom/nr_timer.c | 47 ++++++++++++++++++++++++----------------------- 2 files changed, 27 insertions(+), 26 deletions(-) (limited to 'net/netrom') diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index ebf16f7f9089..2dec3583c97d 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -241,9 +241,9 @@ void nr_destroy_socket(struct sock *); /* * Handler for deferred kills. */ -static void nr_destroy_timer(unsigned long data) +static void nr_destroy_timer(struct timer_list *t) { - struct sock *sk=(struct sock *)data; + struct sock *sk = from_timer(sk, t, sk_timer); bh_lock_sock(sk); sock_hold(sk); nr_destroy_socket(sk); @@ -284,7 +284,7 @@ void nr_destroy_socket(struct sock *sk) if (sk_has_allocations(sk)) { /* Defer: outstanding buffers */ - sk->sk_timer.function = nr_destroy_timer; + sk->sk_timer.function = (TIMER_FUNC_TYPE)nr_destroy_timer; sk->sk_timer.expires = jiffies + 2 * HZ; add_timer(&sk->sk_timer); } else diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c index f84ce71f1f5f..43569aea0f5e 100644 --- a/net/netrom/nr_timer.c +++ b/net/netrom/nr_timer.c @@ -29,23 +29,23 @@ #include #include -static void nr_heartbeat_expiry(unsigned long); -static void nr_t1timer_expiry(unsigned long); -static void nr_t2timer_expiry(unsigned long); -static void nr_t4timer_expiry(unsigned long); -static void nr_idletimer_expiry(unsigned long); +static void nr_heartbeat_expiry(struct timer_list *); +static void nr_t1timer_expiry(struct timer_list *); +static void nr_t2timer_expiry(struct timer_list *); +static void nr_t4timer_expiry(struct timer_list *); +static void nr_idletimer_expiry(struct timer_list *); void nr_init_timers(struct sock *sk) { struct nr_sock *nr = nr_sk(sk); - setup_timer(&nr->t1timer, nr_t1timer_expiry, (unsigned long)sk); - setup_timer(&nr->t2timer, nr_t2timer_expiry, (unsigned long)sk); - setup_timer(&nr->t4timer, nr_t4timer_expiry, (unsigned long)sk); - setup_timer(&nr->idletimer, nr_idletimer_expiry, (unsigned long)sk); + timer_setup(&nr->t1timer, nr_t1timer_expiry, 0); + timer_setup(&nr->t2timer, nr_t2timer_expiry, 0); + timer_setup(&nr->t4timer, nr_t4timer_expiry, 0); + timer_setup(&nr->idletimer, nr_idletimer_expiry, 0); /* initialized by sock_init_data */ - sk->sk_timer.function = &nr_heartbeat_expiry; + sk->sk_timer.function = (TIMER_FUNC_TYPE)nr_heartbeat_expiry; } void nr_start_t1timer(struct sock *sk) @@ -112,9 +112,9 @@ int nr_t1timer_running(struct sock *sk) return timer_pending(&nr_sk(sk)->t1timer); } -static void nr_heartbeat_expiry(unsigned long param) +static void nr_heartbeat_expiry(struct timer_list *t) { - struct sock *sk = (struct sock *)param; + struct sock *sk = from_timer(sk, t, sk_timer); struct nr_sock *nr = nr_sk(sk); bh_lock_sock(sk); @@ -151,10 +151,10 @@ static void nr_heartbeat_expiry(unsigned long param) bh_unlock_sock(sk); } -static void nr_t2timer_expiry(unsigned long param) +static void nr_t2timer_expiry(struct timer_list *t) { - struct sock *sk = (struct sock *)param; - struct nr_sock *nr = nr_sk(sk); + struct nr_sock *nr = from_timer(nr, t, t2timer); + struct sock *sk = &nr->sock; bh_lock_sock(sk); if (nr->condition & NR_COND_ACK_PENDING) { @@ -164,19 +164,20 @@ static void nr_t2timer_expiry(unsigned long param) bh_unlock_sock(sk); } -static void nr_t4timer_expiry(unsigned long param) +static void nr_t4timer_expiry(struct timer_list *t) { - struct sock *sk = (struct sock *)param; + struct nr_sock *nr = from_timer(nr, t, t4timer); + struct sock *sk = &nr->sock; bh_lock_sock(sk); nr_sk(sk)->condition &= ~NR_COND_PEER_RX_BUSY; bh_unlock_sock(sk); } -static void nr_idletimer_expiry(unsigned long param) +static void nr_idletimer_expiry(struct timer_list *t) { - struct sock *sk = (struct sock *)param; - struct nr_sock *nr = nr_sk(sk); + struct nr_sock *nr = from_timer(nr, t, idletimer); + struct sock *sk = &nr->sock; bh_lock_sock(sk); @@ -201,10 +202,10 @@ static void nr_idletimer_expiry(unsigned long param) bh_unlock_sock(sk); } -static void nr_t1timer_expiry(unsigned long param) +static void nr_t1timer_expiry(struct timer_list *t) { - struct sock *sk = (struct sock *)param; - struct nr_sock *nr = nr_sk(sk); + struct nr_sock *nr = from_timer(nr, t, t1timer); + struct sock *sk = &nr->sock; bh_lock_sock(sk); switch (nr->state) { -- cgit v1.2.3 From e28101a37c3e6b74aeebe4a340636b1782deb830 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Thu, 19 Oct 2017 12:43:08 -0500 Subject: net: netrom: nr_in: mark expected switch fall-through In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva Signed-off-by: David S. Miller --- net/netrom/nr_in.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/netrom') diff --git a/net/netrom/nr_in.c b/net/netrom/nr_in.c index 80dbd0beb516..fbfdae452ff9 100644 --- a/net/netrom/nr_in.c +++ b/net/netrom/nr_in.c @@ -125,7 +125,7 @@ static int nr_state2_machine(struct sock *sk, struct sk_buff *skb, case NR_DISCREQ: nr_write_internal(sk, NR_DISCACK); - + /* fall through */ case NR_DISCACK: nr_disconnect(sk, 0); break; -- cgit v1.2.3 From 4c31606920bab227de10d2c9bf9b4dd8d4327638 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 27 Oct 2017 00:51:04 -0500 Subject: net: netrom: nr_route: refactor code in nr_add_node Code refactoring in order to make the code easier to read and maintain. Signed-off-by: Gustavo A. R. Silva Signed-off-by: David S. Miller --- net/netrom/nr_route.c | 59 ++++++++++++++------------------------------------- 1 file changed, 16 insertions(+), 43 deletions(-) (limited to 'net/netrom') diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c index 0c59354e280e..fba4b4c8efaf 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -80,6 +80,19 @@ static struct nr_neigh *nr_neigh_get_dev(ax25_address *callsign, static void nr_remove_neigh(struct nr_neigh *); +/* re-sort the routes in quality order. */ +static void re_sort_routes(struct nr_node *nr_node, int x, int y) +{ + if (nr_node->routes[y].quality > nr_node->routes[x].quality) { + if (nr_node->which == x) + nr_node->which = y; + else if (nr_node->which == y) + nr_node->which = x; + + swap(nr_node->routes[x], nr_node->routes[y]); + } +} + /* * Add a new route to a node, and in the process add the node and the * neighbour if it is new. @@ -90,7 +103,6 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic, { struct nr_node *nr_node; struct nr_neigh *nr_neigh; - struct nr_route nr_route; int i, found; struct net_device *odev; @@ -251,49 +263,10 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic, /* Now re-sort the routes in quality order */ switch (nr_node->count) { case 3: - if (nr_node->routes[1].quality > nr_node->routes[0].quality) { - switch (nr_node->which) { - case 0: - nr_node->which = 1; - break; - case 1: - nr_node->which = 0; - break; - } - nr_route = nr_node->routes[0]; - nr_node->routes[0] = nr_node->routes[1]; - nr_node->routes[1] = nr_route; - } - if (nr_node->routes[2].quality > nr_node->routes[1].quality) { - switch (nr_node->which) { - case 1: nr_node->which = 2; - break; - - case 2: nr_node->which = 1; - break; - - default: - break; - } - nr_route = nr_node->routes[1]; - nr_node->routes[1] = nr_node->routes[2]; - nr_node->routes[2] = nr_route; - } + re_sort_routes(nr_node, 0, 1); + re_sort_routes(nr_node, 1, 2); case 2: - if (nr_node->routes[1].quality > nr_node->routes[0].quality) { - switch (nr_node->which) { - case 0: nr_node->which = 1; - break; - - case 1: nr_node->which = 0; - break; - - default: break; - } - nr_route = nr_node->routes[0]; - nr_node->routes[0] = nr_node->routes[1]; - nr_node->routes[1] = nr_route; - } + re_sort_routes(nr_node, 0, 1); case 1: break; } -- cgit v1.2.3 From 31f74f0f4e8dfe5b30ff59d9a38a370fbb725f38 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 27 Oct 2017 00:51:08 -0500 Subject: net: netrom: nr_route: mark expected switch fall-throughs In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva Signed-off-by: David S. Miller --- net/netrom/nr_route.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/netrom') diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c index fba4b4c8efaf..75e6ba970fde 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -265,6 +265,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic, case 3: re_sort_routes(nr_node, 0, 1); re_sort_routes(nr_node, 1, 2); + /* fall through */ case 2: re_sort_routes(nr_node, 0, 1); case 1: @@ -357,6 +358,7 @@ static int nr_del_node(ax25_address *callsign, ax25_address *neighbour, struct n switch (i) { case 0: nr_node->routes[0] = nr_node->routes[1]; + /* fall through */ case 1: nr_node->routes[1] = nr_node->routes[2]; case 2: @@ -526,6 +528,7 @@ void nr_rt_device_down(struct net_device *dev) switch (i) { case 0: t->routes[0] = t->routes[1]; + /* fall through */ case 1: t->routes[1] = t->routes[2]; case 2: -- cgit v1.2.3