Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Add BQL support to via-rhine, from Tino Reichardt.

 2) Integrate SWITCHDEV layer support into the DSA layer, so DSA drivers
    can support hw switch offloading.  From Floria Fainelli.

 3) Allow 'ip address' commands to initiate multicast group join/leave,
    from Madhu Challa.

 4) Many ipv4 FIB lookup optimizations from Alexander Duyck.

 5) Support EBPF in cls_bpf classifier and act_bpf action, from Daniel
    Borkmann.

 6) Remove the ugly compat support in ARP for ugly layers like ax25,
    rose, etc.  And use this to clean up the neigh layer, then use it to
    implement MPLS support.  All from Eric Biederman.

 7) Support L3 forwarding offloading in switches, from Scott Feldman.

 8) Collapse the LOCAL and MAIN ipv4 FIB tables when possible, to speed
    up route lookups even further.  From Alexander Duyck.

 9) Many improvements and bug fixes to the rhashtable implementation,
    from Herbert Xu and Thomas Graf.  In particular, in the case where
    an rhashtable user bulk adds a large number of items into an empty
    table, we expand the table much more sanely.

10) Don't make the tcp_metrics hash table per-namespace, from Eric
    Biederman.

11) Extend EBPF to access SKB fields, from Alexei Starovoitov.

12) Split out new connection request sockets so that they can be
    established in the main hash table.  Much less false sharing since
    hash lookups go direct to the request sockets instead of having to
    go first to the listener then to the request socks hashed
    underneath.  From Eric Dumazet.

13) Add async I/O support for crytpo AF_ALG sockets, from Tadeusz Struk.

14) Support stable privacy address generation for RFC7217 in IPV6.  From
    Hannes Frederic Sowa.

15) Hash network namespace into IP frag IDs, also from Hannes Frederic
    Sowa.

16) Convert PTP get/set methods to use 64-bit time, from Richard
    Cochran.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1816 commits)
  fm10k: Bump driver version to 0.15.2
  fm10k: corrected VF multicast update
  fm10k: mbx_update_max_size does not drop all oversized messages
  fm10k: reset head instead of calling update_max_size
  fm10k: renamed mbx_tx_dropped to mbx_tx_oversized
  fm10k: update xcast mode before synchronizing multicast addresses
  fm10k: start service timer on probe
  fm10k: fix function header comment
  fm10k: comment next_vf_mbx flow
  fm10k: don't handle mailbox events in iov_event path and always process mailbox
  fm10k: use separate workqueue for fm10k driver
  fm10k: Set PF queues to unlimited bandwidth during virtualization
  fm10k: expose tx_timeout_count as an ethtool stat
  fm10k: only increment tx_timeout_count in Tx hang path
  fm10k: remove extraneous "Reset interface" message
  fm10k: separate PF only stats so that VF does not display them
  fm10k: use hw->mac.max_queues for stats
  fm10k: only show actual queues, not the maximum in hardware
  fm10k: allow creation of VLAN on default vid
  fm10k: fix unused warnings
  ...

1 files changed, 264 insertions, 65 deletions

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1d65c5be7c82..56f9edbf3d05 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -30,6 +30,12 @@
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 #include <net/bluetooth/hci_mon.h>
+#include <net/bluetooth/mgmt.h>
+
+#include "mgmt_util.h"
+
+static LIST_HEAD(mgmt_chan_list);
+static DEFINE_MUTEX(mgmt_chan_list_lock);
 
 static atomic_t monitor_promisc = ATOMIC_INIT(0);
 
@@ -44,11 +50,32 @@ struct hci_pinfo {
 	struct hci_filter filter;
 	__u32             cmsg_mask;
 	unsigned short    channel;
+	unsigned long     flags;
 };
 
-static inline int hci_test_bit(int nr, void *addr)
+void hci_sock_set_flag(struct sock *sk, int nr)
+{
+	set_bit(nr, &hci_pi(sk)->flags);
+}
+
+void hci_sock_clear_flag(struct sock *sk, int nr)
 {
-	return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
+	clear_bit(nr, &hci_pi(sk)->flags);
+}
+
+int hci_sock_test_flag(struct sock *sk, int nr)
+{
+	return test_bit(nr, &hci_pi(sk)->flags);
+}
+
+unsigned short hci_sock_get_channel(struct sock *sk)
+{
+	return hci_pi(sk)->channel;
+}
+
+static inline int hci_test_bit(int nr, const void *addr)
+{
+	return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
 }
 
 /* Security filter */
@@ -183,54 +210,31 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
 	kfree_skb(skb_copy);
 }
 
-/* Send frame to control socket */
-void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk)
+/* Send frame to sockets with specific channel */
+void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
+			 int flag, struct sock *skip_sk)
 {
 	struct sock *sk;
 
-	BT_DBG("len %d", skb->len);
+	BT_DBG("channel %u len %d", channel, skb->len);
 
 	read_lock(&hci_sk_list.lock);
 
 	sk_for_each(sk, &hci_sk_list.head) {
 		struct sk_buff *nskb;
 
-		/* Skip the original socket */
-		if (sk == skip_sk)
-			continue;
-
-		if (sk->sk_state != BT_BOUND)
-			continue;
-
-		if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
+		/* Ignore socket without the flag set */
+		if (!hci_sock_test_flag(sk, flag))
 			continue;
 
-		nskb = skb_clone(skb, GFP_ATOMIC);
-		if (!nskb)
+		/* Skip the original socket */
+		if (sk == skip_sk)
 			continue;
 
-		if (sock_queue_rcv_skb(sk, nskb))
-			kfree_skb(nskb);
-	}
-
-	read_unlock(&hci_sk_list.lock);
-}
-
-static void queue_monitor_skb(struct sk_buff *skb)
-{
-	struct sock *sk;
-
-	BT_DBG("len %d", skb->len);
-
-	read_lock(&hci_sk_list.lock);
-
-	sk_for_each(sk, &hci_sk_list.head) {
-		struct sk_buff *nskb;
-
 		if (sk->sk_state != BT_BOUND)
 			continue;
 
-		if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
+		if (hci_pi(sk)->channel != channel)
 			continue;
 
 		nskb = skb_clone(skb, GFP_ATOMIC);
@@ -290,7 +294,8 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
 	hdr->index = cpu_to_le16(hdev->id);
 	hdr->len = cpu_to_le16(skb->len);
 
-	queue_monitor_skb(skb_copy);
+	hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
+			    HCI_SOCK_TRUSTED, NULL);
 	kfree_skb(skb_copy);
 }
 
@@ -397,7 +402,8 @@ void hci_sock_dev_event(struct hci_dev *hdev, int event)
 
 		skb = create_monitor_event(hdev, event);
 		if (skb) {
-			queue_monitor_skb(skb);
+			hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+					    HCI_SOCK_TRUSTED, NULL);
 			kfree_skb(skb);
 		}
 	}
@@ -428,6 +434,56 @@ void hci_sock_dev_event(struct hci_dev *hdev, int event)
 	}
 }
 
+static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
+{
+	struct hci_mgmt_chan *c;
+
+	list_for_each_entry(c, &mgmt_chan_list, list) {
+		if (c->channel == channel)
+			return c;
+	}
+
+	return NULL;
+}
+
+static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
+{
+	struct hci_mgmt_chan *c;
+
+	mutex_lock(&mgmt_chan_list_lock);
+	c = __hci_mgmt_chan_find(channel);
+	mutex_unlock(&mgmt_chan_list_lock);
+
+	return c;
+}
+
+int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
+{
+	if (c->channel < HCI_CHANNEL_CONTROL)
+		return -EINVAL;
+
+	mutex_lock(&mgmt_chan_list_lock);
+	if (__hci_mgmt_chan_find(c->channel)) {
+		mutex_unlock(&mgmt_chan_list_lock);
+		return -EALREADY;
+	}
+
+	list_add_tail(&c->list, &mgmt_chan_list);
+
+	mutex_unlock(&mgmt_chan_list_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(hci_mgmt_chan_register);
+
+void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
+{
+	mutex_lock(&mgmt_chan_list_lock);
+	list_del(&c->list);
+	mutex_unlock(&mgmt_chan_list_lock);
+}
+EXPORT_SYMBOL(hci_mgmt_chan_unregister);
+
 static int hci_sock_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
@@ -448,7 +504,7 @@ static int hci_sock_release(struct socket *sock)
 	if (hdev) {
 		if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
 			mgmt_index_added(hdev);
-			clear_bit(HCI_USER_CHANNEL, &hdev->dev_flags);
+			hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
 			hci_dev_close(hdev->id);
 		}
 
@@ -508,10 +564,10 @@ static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
 	if (!hdev)
 		return -EBADFD;
 
-	if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
+	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
 		return -EBUSY;
 
-	if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
+	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
 		return -EOPNOTSUPP;
 
 	if (hdev->dev_type != HCI_BREDR)
@@ -687,14 +743,14 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 
 		if (test_bit(HCI_UP, &hdev->flags) ||
 		    test_bit(HCI_INIT, &hdev->flags) ||
-		    test_bit(HCI_SETUP, &hdev->dev_flags) ||
-		    test_bit(HCI_CONFIG, &hdev->dev_flags)) {
+		    hci_dev_test_flag(hdev, HCI_SETUP) ||
+		    hci_dev_test_flag(hdev, HCI_CONFIG)) {
 			err = -EBUSY;
 			hci_dev_put(hdev);
 			goto done;
 		}
 
-		if (test_and_set_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
+		if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
 			err = -EUSERS;
 			hci_dev_put(hdev);
 			goto done;
@@ -704,7 +760,7 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 
 		err = hci_dev_open(hdev->id);
 		if (err) {
-			clear_bit(HCI_USER_CHANNEL, &hdev->dev_flags);
+			hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
 			mgmt_index_added(hdev);
 			hci_dev_put(hdev);
 			goto done;
@@ -715,38 +771,62 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 		hci_pi(sk)->hdev = hdev;
 		break;
 
-	case HCI_CHANNEL_CONTROL:
+	case HCI_CHANNEL_MONITOR:
 		if (haddr.hci_dev != HCI_DEV_NONE) {
 			err = -EINVAL;
 			goto done;
 		}
 
-		if (!capable(CAP_NET_ADMIN)) {
+		if (!capable(CAP_NET_RAW)) {
 			err = -EPERM;
 			goto done;
 		}
 
+		/* The monitor interface is restricted to CAP_NET_RAW
+		 * capabilities and with that implicitly trusted.
+		 */
+		hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		send_monitor_replay(sk);
+
+		atomic_inc(&monitor_promisc);
 		break;
 
-	case HCI_CHANNEL_MONITOR:
-		if (haddr.hci_dev != HCI_DEV_NONE) {
+	default:
+		if (!hci_mgmt_chan_find(haddr.hci_channel)) {
 			err = -EINVAL;
 			goto done;
 		}
 
-		if (!capable(CAP_NET_RAW)) {
-			err = -EPERM;
+		if (haddr.hci_dev != HCI_DEV_NONE) {
+			err = -EINVAL;
 			goto done;
 		}
 
-		send_monitor_replay(sk);
-
-		atomic_inc(&monitor_promisc);
+		/* Users with CAP_NET_ADMIN capabilities are allowed
+		 * access to all management commands and events. For
+		 * untrusted users the interface is restricted and
+		 * also only untrusted events are sent.
+		 */
+		if (capable(CAP_NET_ADMIN))
+			hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
+
+		/* At the moment the index and unconfigured index events
+		 * are enabled unconditionally. Setting them on each
+		 * socket when binding keeps this functionality. They
+		 * however might be cleared later and then sending of these
+		 * events will be disabled, but that is then intentional.
+		 *
+		 * This also enables generic events that are safe to be
+		 * received by untrusted users. Example for such events
+		 * are changes to settings, class of device, name etc.
+		 */
+		if (haddr.hci_channel == HCI_CHANNEL_CONTROL) {
+			hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
+			hci_sock_set_flag(sk, HCI_MGMT_GENERIC_EVENTS);
+		}
 		break;
-
-	default:
-		err = -EINVAL;
-		goto done;
 	}
 
 
@@ -826,8 +906,8 @@ static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
 	}
 }
 
-static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
-			    struct msghdr *msg, size_t len, int flags)
+static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+			    int flags)
 {
 	int noblock = flags & MSG_DONTWAIT;
 	struct sock *sk = sock->sk;
@@ -860,10 +940,13 @@ static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 		hci_sock_cmsg(sk, msg, skb);
 		break;
 	case HCI_CHANNEL_USER:
-	case HCI_CHANNEL_CONTROL:
 	case HCI_CHANNEL_MONITOR:
 		sock_recv_timestamp(msg, sk, skb);
 		break;
+	default:
+		if (hci_mgmt_chan_find(hci_pi(sk)->channel))
+			sock_recv_timestamp(msg, sk, skb);
+		break;
 	}
 
 	skb_free_datagram(sk, skb);
@@ -871,10 +954,122 @@ static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	return err ? : copied;
 }
 
-static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
-			    struct msghdr *msg, size_t len)
+static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
+			struct msghdr *msg, size_t msglen)
+{
+	void *buf;
+	u8 *cp;
+	struct mgmt_hdr *hdr;
+	u16 opcode, index, len;
+	struct hci_dev *hdev = NULL;
+	const struct hci_mgmt_handler *handler;
+	bool var_len, no_hdev;
+	int err;
+
+	BT_DBG("got %zu bytes", msglen);
+
+	if (msglen < sizeof(*hdr))
+		return -EINVAL;
+
+	buf = kmalloc(msglen, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (memcpy_from_msg(buf, msg, msglen)) {
+		err = -EFAULT;
+		goto done;
+	}
+
+	hdr = buf;
+	opcode = __le16_to_cpu(hdr->opcode);
+	index = __le16_to_cpu(hdr->index);
+	len = __le16_to_cpu(hdr->len);
+
+	if (len != msglen - sizeof(*hdr)) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	if (opcode >= chan->handler_count ||
+	    chan->handlers[opcode].func == NULL) {
+		BT_DBG("Unknown op %u", opcode);
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_UNKNOWN_COMMAND);
+		goto done;
+	}
+
+	handler = &chan->handlers[opcode];
+
+	if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
+	    !(handler->flags & HCI_MGMT_UNTRUSTED)) {
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_PERMISSION_DENIED);
+		goto done;
+	}
+
+	if (index != MGMT_INDEX_NONE) {
+		hdev = hci_dev_get(index);
+		if (!hdev) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+
+		if (hci_dev_test_flag(hdev, HCI_SETUP) ||
+		    hci_dev_test_flag(hdev, HCI_CONFIG) ||
+		    hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+
+		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
+		    !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
+			err = mgmt_cmd_status(sk, index, opcode,
+					      MGMT_STATUS_INVALID_INDEX);
+			goto done;
+		}
+	}
+
+	no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
+	if (no_hdev != !hdev) {
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_INVALID_INDEX);
+		goto done;
+	}
+
+	var_len = (handler->flags & HCI_MGMT_VAR_LEN);
+	if ((var_len && len < handler->data_len) ||
+	    (!var_len && len != handler->data_len)) {
+		err = mgmt_cmd_status(sk, index, opcode,
+				      MGMT_STATUS_INVALID_PARAMS);
+		goto done;
+	}
+
+	if (hdev && chan->hdev_init)
+		chan->hdev_init(sk, hdev);
+
+	cp = buf + sizeof(*hdr);
+
+	err = handler->func(sk, hdev, cp, len);
+	if (err < 0)
+		goto done;
+
+	err = msglen;
+
+done:
+	if (hdev)
+		hci_dev_put(hdev);
+
+	kfree(buf);
+	return err;
+}
+
+static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+			    size_t len)
 {
 	struct sock *sk = sock->sk;
+	struct hci_mgmt_chan *chan;
 	struct hci_dev *hdev;
 	struct sk_buff *skb;
 	int err;
@@ -896,14 +1091,18 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 	case HCI_CHANNEL_RAW:
 	case HCI_CHANNEL_USER:
 		break;
-	case HCI_CHANNEL_CONTROL:
-		err = mgmt_control(sk, msg, len);
-		goto done;
 	case HCI_CHANNEL_MONITOR:
 		err = -EOPNOTSUPP;
 		goto done;
 	default:
-		err = -EINVAL;
+		mutex_lock(&mgmt_chan_list_lock);
+		chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
+		if (chan)
+			err = hci_mgmt_cmd(chan, sk, msg, len);
+		else
+			err = -EINVAL;
+
+		mutex_unlock(&mgmt_chan_list_lock);
 		goto done;
 	}