Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 74 insertions, 46 deletions

diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index f738ccd535f..c13e02ebdef 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -78,9 +78,11 @@ static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 	llcp_sock->local = local;
 	llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
 	llcp_sock->service_name_len = min_t(unsigned int,
-			llcp_addr.service_name_len, NFC_LLCP_MAX_SERVICE_NAME);
+					    llcp_addr.service_name_len,
+					    NFC_LLCP_MAX_SERVICE_NAME);
 	llcp_sock->service_name = kmemdup(llcp_addr.service_name,
-				llcp_sock->service_name_len, GFP_KERNEL);
+					  llcp_sock->service_name_len,
+					  GFP_KERNEL);
 
 	llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock);
 	if (llcp_sock->ssap == LLCP_MAX_SAP)
@@ -110,7 +112,7 @@ static int llcp_sock_listen(struct socket *sock, int backlog)
 	lock_sock(sk);
 
 	if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM)
-			|| sk->sk_state != LLCP_BOUND) {
+	    || sk->sk_state != LLCP_BOUND) {
 		ret = -EBADFD;
 		goto error;
 	}
@@ -149,13 +151,13 @@ void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk)
 	sock_hold(sk);
 
 	list_add_tail(&llcp_sock->accept_queue,
-			&llcp_sock_parent->accept_queue);
+		      &llcp_sock_parent->accept_queue);
 	llcp_sock->parent = parent;
 	sk_acceptq_added(parent);
 }
 
 struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
-					struct socket *newsock)
+				     struct socket *newsock)
 {
 	struct nfc_llcp_sock *lsk, *n, *llcp_parent;
 	struct sock *sk;
@@ -163,7 +165,7 @@ struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
 	llcp_parent = nfc_llcp_sock(parent);
 
 	list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue,
-							accept_queue) {
+				 accept_queue) {
 		sk = &lsk->sk;
 		lock_sock(sk);
 
@@ -192,7 +194,7 @@ struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
 }
 
 static int llcp_sock_accept(struct socket *sock, struct socket *newsock,
-								int flags)
+			    int flags)
 {
 	DECLARE_WAITQUEUE(wait, current);
 	struct sock *sk = sock->sk, *new_sk;
@@ -248,7 +250,7 @@ error:
 static int llcp_sock_getname(struct socket *sock, struct sockaddr *addr,
 			     int *len, int peer)
 {
-	struct sockaddr_nfc_llcp *llcp_addr = (struct sockaddr_nfc_llcp *) addr;
+	struct sockaddr_nfc_llcp *llcp_addr = (struct sockaddr_nfc_llcp *)addr;
 	struct sock *sk = sock->sk;
 	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
 
@@ -262,7 +264,7 @@ static int llcp_sock_getname(struct socket *sock, struct sockaddr *addr,
 	llcp_addr->ssap = llcp_sock->ssap;
 	llcp_addr->service_name_len = llcp_sock->service_name_len;
 	memcpy(llcp_addr->service_name, llcp_sock->service_name,
-					llcp_addr->service_name_len);
+	       llcp_addr->service_name_len);
 
 	return 0;
 }
@@ -275,7 +277,7 @@ static inline unsigned int llcp_accept_poll(struct sock *parent)
 	parent_sock = nfc_llcp_sock(parent);
 
 	list_for_each_entry_safe(llcp_sock, n, &parent_sock->accept_queue,
-								accept_queue) {
+				 accept_queue) {
 		sk = &llcp_sock->sk;
 
 		if (sk->sk_state == LLCP_CONNECTED)
@@ -286,7 +288,7 @@ static inline unsigned int llcp_accept_poll(struct sock *parent)
 }
 
 static unsigned int llcp_sock_poll(struct file *file, struct socket *sock,
-							poll_table *wait)
+				   poll_table *wait)
 {
 	struct sock *sk = sock->sk;
 	unsigned int mask = 0;
@@ -315,6 +317,7 @@ static int llcp_sock_release(struct socket *sock)
 	struct sock *sk = sock->sk;
 	struct nfc_llcp_local *local;
 	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+	int err = 0;
 
 	if (!sk)
 		return 0;
@@ -322,25 +325,17 @@ static int llcp_sock_release(struct socket *sock)
 	pr_debug("%p\n", sk);
 
 	local = llcp_sock->local;
-	if (local == NULL)
-		return -ENODEV;
+	if (local == NULL) {
+		err = -ENODEV;
+		goto out;
+	}
 
 	mutex_lock(&local->socket_lock);
 
-	if (llcp_sock == local->sockets[llcp_sock->ssap]) {
+	if (llcp_sock == local->sockets[llcp_sock->ssap])
 		local->sockets[llcp_sock->ssap] = NULL;
-	} else {
-		struct nfc_llcp_sock *parent, *s, *n;
-
-		parent = local->sockets[llcp_sock->ssap];
-
-		list_for_each_entry_safe(s, n, &parent->list, list)
-			if (llcp_sock == s) {
-				list_del(&s->list);
-				break;
-			}
-
-	}
+	else
+		list_del_init(&llcp_sock->list);
 
 	mutex_unlock(&local->socket_lock);
 
@@ -355,7 +350,7 @@ static int llcp_sock_release(struct socket *sock)
 		struct sock *accept_sk;
 
 		list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
-								accept_queue) {
+					 accept_queue) {
 			accept_sk = &lsk->sk;
 			lock_sock(accept_sk);
 
@@ -364,31 +359,27 @@ static int llcp_sock_release(struct socket *sock)
 
 			release_sock(accept_sk);
 
-			sock_set_flag(sk, SOCK_DEAD);
 			sock_orphan(accept_sk);
-			sock_put(accept_sk);
 		}
 	}
 
 	/* Freeing the SAP */
 	if ((sk->sk_state == LLCP_CONNECTED
-			&& llcp_sock->ssap > LLCP_LOCAL_SAP_OFFSET) ||
-	    sk->sk_state == LLCP_BOUND ||
-	    sk->sk_state == LLCP_LISTEN)
+	     && llcp_sock->ssap > LLCP_LOCAL_SAP_OFFSET) ||
+	    sk->sk_state == LLCP_BOUND || sk->sk_state == LLCP_LISTEN)
 		nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
 
-	sock_set_flag(sk, SOCK_DEAD);
-
 	release_sock(sk);
 
+out:
 	sock_orphan(sk);
 	sock_put(sk);
 
-	return 0;
+	return err;
 }
 
 static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
-							int len, int flags)
+			     int len, int flags)
 {
 	struct sock *sk = sock->sk;
 	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
@@ -400,7 +391,7 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 	pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags);
 
 	if (!addr || len < sizeof(struct sockaddr_nfc) ||
-			addr->sa_family != AF_NFC) {
+	    addr->sa_family != AF_NFC) {
 		pr_err("Invalid socket\n");
 		return -EINVAL;
 	}
@@ -411,7 +402,7 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 	}
 
 	pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
-					addr->target_idx, addr->nfc_protocol);
+		 addr->target_idx, addr->nfc_protocol);
 
 	lock_sock(sk);
 
@@ -441,7 +432,7 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 	device_unlock(&dev->dev);
 
 	if (local->rf_mode == NFC_RF_INITIATOR &&
-			addr->target_idx != local->target_idx) {
+	    addr->target_idx != local->target_idx) {
 		ret = -ENOLINK;
 		goto put_dev;
 	}
@@ -459,9 +450,11 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 		llcp_sock->dsap = LLCP_SAP_SDP;
 	llcp_sock->nfc_protocol = addr->nfc_protocol;
 	llcp_sock->service_name_len = min_t(unsigned int,
-			addr->service_name_len, NFC_LLCP_MAX_SERVICE_NAME);
+					    addr->service_name_len,
+					    NFC_LLCP_MAX_SERVICE_NAME);
 	llcp_sock->service_name = kmemdup(addr->service_name,
-				 llcp_sock->service_name_len, GFP_KERNEL);
+					  llcp_sock->service_name_len,
+					  GFP_KERNEL);
 
 	local->sockets[llcp_sock->ssap] = llcp_sock;
 
@@ -482,6 +475,34 @@ error:
 	return ret;
 }
 
+static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
+			     struct msghdr *msg, size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+	int ret;
+
+	pr_debug("sock %p sk %p", sock, sk);
+
+	ret = sock_error(sk);
+	if (ret)
+		return ret;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	lock_sock(sk);
+
+	if (sk->sk_state != LLCP_CONNECTED) {
+		release_sock(sk);
+		return -ENOTCONN;
+	}
+
+	release_sock(sk);
+
+	return nfc_llcp_send_i_frame(llcp_sock, msg, len);
+}
+
 static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 			     struct msghdr *msg, size_t len, int flags)
 {
@@ -496,7 +517,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	lock_sock(sk);
 
 	if (sk->sk_state == LLCP_CLOSED &&
-			skb_queue_empty(&sk->sk_receive_queue)) {
+	    skb_queue_empty(&sk->sk_receive_queue)) {
 		release_sock(sk);
 		return 0;
 	}
@@ -509,7 +530,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	skb = skb_recv_datagram(sk, flags, noblock, &err);
 	if (!skb) {
 		pr_err("Recv datagram failed state %d %d %d",
-				sk->sk_state, err, sock_error(sk));
+		       sk->sk_state, err, sock_error(sk));
 
 		if (sk->sk_shutdown & RCV_SHUTDOWN)
 			return 0;
@@ -517,7 +538,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 		return err;
 	}
 
-	rlen   = skb->len;		/* real length of skb */
+	rlen = skb->len;		/* real length of skb */
 	copied = min_t(unsigned int, rlen, len);
 
 	cskb = skb;
@@ -567,7 +588,7 @@ static const struct proto_ops llcp_sock_ops = {
 	.shutdown       = sock_no_shutdown,
 	.setsockopt     = sock_no_setsockopt,
 	.getsockopt     = sock_no_getsockopt,
-	.sendmsg        = sock_no_sendmsg,
+	.sendmsg        = llcp_sock_sendmsg,
 	.recvmsg        = llcp_sock_recvmsg,
 	.mmap           = sock_no_mmap,
 };
@@ -627,6 +648,8 @@ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
 
 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
 {
+	struct nfc_llcp_local *local = sock->local;
+
 	kfree(sock->service_name);
 
 	skb_queue_purge(&sock->tx_queue);
@@ -635,11 +658,16 @@ void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
 
 	list_del_init(&sock->accept_queue);
 
+	if (local != NULL && sock == local->sockets[sock->ssap])
+		local->sockets[sock->ssap] = NULL;
+	else
+		list_del_init(&sock->list);
+
 	sock->parent = NULL;
 }
 
 static int llcp_sock_create(struct net *net, struct socket *sock,
-				const struct nfc_protocol *nfc_proto)
+			    const struct nfc_protocol *nfc_proto)
 {
 	struct sock *sk;