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

Pull networking changes from David Miller:

 1) GRE now works over ipv6, from Dmitry Kozlov.

 2) Make SCTP more network namespace aware, from Eric Biederman.

 3) TEAM driver now works with non-ethernet devices, from Jiri Pirko.

 4) Make openvswitch network namespace aware, from Pravin B Shelar.

 5) IPV6 NAT implementation, from Patrick McHardy.

 6) Server side support for TCP Fast Open, from Jerry Chu and others.

 7) Packet BPF filter supports MOD and XOR, from Eric Dumazet and Daniel
    Borkmann.

 8) Increate the loopback default MTU to 64K, from Eric Dumazet.

 9) Use a per-task rather than per-socket page fragment allocator for
    outgoing networking traffic.  This benefits processes that have very
    many mostly idle sockets, which is quite common.

    From Eric Dumazet.

10) Use up to 32K for page fragment allocations, with fallbacks to
    smaller sizes when higher order page allocations fail.  Benefits are
    a) less segments for driver to process b) less calls to page
    allocator c) less waste of space.

    From Eric Dumazet.

11) Allow GRO to be used on GRE tunnels, from Eric Dumazet.

12) VXLAN device driver, one way to handle VLAN issues such as the
    limitation of 4096 VLAN IDs yet still have some level of isolation.
    From Stephen Hemminger.

13) As usual there is a large boatload of driver changes, with the scale
    perhaps tilted towards the wireless side this time around.

Fix up various fairly trivial conflicts, mostly caused by the user
namespace changes.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1012 commits)
  hyperv: Add buffer for extended info after the RNDIS response message.
  hyperv: Report actual status in receive completion packet
  hyperv: Remove extra allocated space for recv_pkt_list elements
  hyperv: Fix page buffer handling in rndis_filter_send_request()
  hyperv: Fix the missing return value in rndis_filter_set_packet_filter()
  hyperv: Fix the max_xfer_size in RNDIS initialization
  vxlan: put UDP socket in correct namespace
  vxlan: Depend on CONFIG_INET
  sfc: Fix the reported priorities of different filter types
  sfc: Remove EFX_FILTER_FLAG_RX_OVERRIDE_IP
  sfc: Fix loopback self-test with separate_tx_channels=1
  sfc: Fix MCDI structure field lookup
  sfc: Add parentheses around use of bitfield macro arguments
  sfc: Fix null function pointer in efx_sriov_channel_type
  vxlan: virtual extensible lan
  igmp: export symbol ip_mc_leave_group
  netlink: add attributes to fdb interface
  tg3: unconditionally select HWMON support when tg3 is enabled.
  Revert "net: ti cpsw ethernet: allow reading phy interface mode from DT"
  gre: fix sparse warning
  ...

1 files changed, 16 insertions, 541 deletions

diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c
index 8818dd681c1..65123a21b97 100644
--- a/drivers/scsi/scsi_netlink.c
+++ b/drivers/scsi/scsi_netlink.c
@@ -33,40 +33,6 @@
 struct sock *scsi_nl_sock = NULL;
 EXPORT_SYMBOL_GPL(scsi_nl_sock);
 
-static DEFINE_SPINLOCK(scsi_nl_lock);
-static struct list_head scsi_nl_drivers;
-
-static u32	scsi_nl_state;
-#define STATE_EHANDLER_BSY		0x00000001
-
-struct scsi_nl_transport {
-	int (*msg_handler)(struct sk_buff *);
-	void (*event_handler)(struct notifier_block *, unsigned long, void *);
-	unsigned int refcnt;
-	int flags;
-};
-
-/* flags values (bit flags) */
-#define HANDLER_DELETING		0x1
-
-static struct scsi_nl_transport transports[SCSI_NL_MAX_TRANSPORTS] =
-	{ {NULL, }, };
-
-
-struct scsi_nl_drvr {
-	struct list_head next;
-	int (*dmsg_handler)(struct Scsi_Host *shost, void *payload,
-				 u32 len, u32 pid);
-	void (*devt_handler)(struct notifier_block *nb,
-				 unsigned long event, void *notify_ptr);
-	struct scsi_host_template *hostt;
-	u64 vendor_id;
-	unsigned int refcnt;
-	int flags;
-};
-
-
-
 /**
  * scsi_nl_rcv_msg - Receive message handler.
  * @skb:		socket receive buffer
@@ -81,7 +47,6 @@ scsi_nl_rcv_msg(struct sk_buff *skb)
 {
 	struct nlmsghdr *nlh;
 	struct scsi_nl_hdr *hdr;
-	unsigned long flags;
 	u32 rlen;
 	int err, tport;
 
@@ -126,22 +91,24 @@ scsi_nl_rcv_msg(struct sk_buff *skb)
 		/*
 		 * Deliver message to the appropriate transport
 		 */
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-
 		tport = hdr->transport;
-		if ((tport < SCSI_NL_MAX_TRANSPORTS) &&
-		    !(transports[tport].flags & HANDLER_DELETING) &&
-		    (transports[tport].msg_handler)) {
-			transports[tport].refcnt++;
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			err = transports[tport].msg_handler(skb);
-			spin_lock_irqsave(&scsi_nl_lock, flags);
-			transports[tport].refcnt--;
-		} else
+		if (tport == SCSI_NL_TRANSPORT) {
+			switch (hdr->msgtype) {
+			case SCSI_NL_SHOST_VENDOR:
+				/* Locate the driver that corresponds to the message */
+				err = -ESRCH;
+				break;
+			default:
+				err = -EBADR;
+				break;
+			}
+			if (err)
+				printk(KERN_WARNING "%s: Msgtype %d failed - err %d\n",
+				       __func__, hdr->msgtype, err);
+		}
+		else
 			err = -ENOENT;
 
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
 next_msg:
 		if ((err) || (nlh->nlmsg_flags & NLM_F_ACK))
 			netlink_ack(skb, nlh, err);
@@ -150,333 +117,6 @@ next_msg:
 	}
 }
 
-
-/**
- * scsi_nl_rcv_event - Event handler for a netlink socket.
- * @this:		event notifier block
- * @event:		event type
- * @ptr:		event payload
- *
- **/
-static int
-scsi_nl_rcv_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
-	struct netlink_notify *n = ptr;
-	struct scsi_nl_drvr *driver;
-	unsigned long flags;
-	int tport;
-
-	if (n->protocol != NETLINK_SCSITRANSPORT)
-		return NOTIFY_DONE;
-
-	spin_lock_irqsave(&scsi_nl_lock, flags);
-	scsi_nl_state |= STATE_EHANDLER_BSY;
-
-	/*
-	 * Pass event on to any transports that may be listening
-	 */
-	for (tport = 0; tport < SCSI_NL_MAX_TRANSPORTS; tport++) {
-		if (!(transports[tport].flags & HANDLER_DELETING) &&
-		    (transports[tport].event_handler)) {
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			transports[tport].event_handler(this, event, ptr);
-			spin_lock_irqsave(&scsi_nl_lock, flags);
-		}
-	}
-
-	/*
-	 * Pass event on to any drivers that may be listening
-	 */
-	list_for_each_entry(driver, &scsi_nl_drivers, next) {
-		if (!(driver->flags & HANDLER_DELETING) &&
-		    (driver->devt_handler)) {
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			driver->devt_handler(this, event, ptr);
-			spin_lock_irqsave(&scsi_nl_lock, flags);
-		}
-	}
-
-	scsi_nl_state &= ~STATE_EHANDLER_BSY;
-	spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block scsi_netlink_notifier = {
-	.notifier_call  = scsi_nl_rcv_event,
-};
-
-
-/*
- * GENERIC SCSI transport receive and event handlers
- */
-
-/**
- * scsi_generic_msg_handler - receive message handler for GENERIC transport messages
- * @skb:		socket receive buffer
- **/
-static int
-scsi_generic_msg_handler(struct sk_buff *skb)
-{
-	struct nlmsghdr *nlh = nlmsg_hdr(skb);
-	struct scsi_nl_hdr *snlh = NLMSG_DATA(nlh);
-	struct scsi_nl_drvr *driver;
-	struct Scsi_Host *shost;
-	unsigned long flags;
-	int err = 0, match, pid;
-
-	pid = NETLINK_CREDS(skb)->pid;
-
-	switch (snlh->msgtype) {
-	case SCSI_NL_SHOST_VENDOR:
-		{
-		struct scsi_nl_host_vendor_msg *msg = NLMSG_DATA(nlh);
-
-		/* Locate the driver that corresponds to the message */
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-		match = 0;
-		list_for_each_entry(driver, &scsi_nl_drivers, next) {
-			if (driver->vendor_id == msg->vendor_id) {
-				match = 1;
-				break;
-			}
-		}
-
-		if ((!match) || (!driver->dmsg_handler)) {
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			err = -ESRCH;
-			goto rcv_exit;
-		}
-
-		if (driver->flags & HANDLER_DELETING) {
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			err = -ESHUTDOWN;
-			goto rcv_exit;
-		}
-
-		driver->refcnt++;
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-
-		/* if successful, scsi_host_lookup takes a shost reference */
-		shost = scsi_host_lookup(msg->host_no);
-		if (!shost) {
-			err = -ENODEV;
-			goto driver_exit;
-		}
-
-		/* is this host owned by the vendor ? */
-		if (shost->hostt != driver->hostt) {
-			err = -EINVAL;
-			goto vendormsg_put;
-		}
-
-		/* pass message on to the driver */
-		err = driver->dmsg_handler(shost, (void *)&msg[1],
-					 msg->vmsg_datalen, pid);
-
-vendormsg_put:
-		/* release reference by scsi_host_lookup */
-		scsi_host_put(shost);
-
-driver_exit:
-		/* release our own reference on the registration object */
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-		driver->refcnt--;
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-		break;
-		}
-
-	default:
-		err = -EBADR;
-		break;
-	}
-
-rcv_exit:
-	if (err)
-		printk(KERN_WARNING "%s: Msgtype %d failed - err %d\n",
-			 __func__, snlh->msgtype, err);
-	return err;
-}
-
-
-/**
- * scsi_nl_add_transport -
- *    Registers message and event handlers for a transport. Enables
- *    receipt of netlink messages and events to a transport.
- *
- * @tport:		transport registering handlers
- * @msg_handler:	receive message handler callback
- * @event_handler:	receive event handler callback
- **/
-int
-scsi_nl_add_transport(u8 tport,
-	int (*msg_handler)(struct sk_buff *),
-	void (*event_handler)(struct notifier_block *, unsigned long, void *))
-{
-	unsigned long flags;
-	int err = 0;
-
-	if (tport >= SCSI_NL_MAX_TRANSPORTS)
-		return -EINVAL;
-
-	spin_lock_irqsave(&scsi_nl_lock, flags);
-
-	if (scsi_nl_state & STATE_EHANDLER_BSY) {
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-		msleep(1);
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-	}
-
-	if (transports[tport].msg_handler || transports[tport].event_handler) {
-		err = -EALREADY;
-		goto register_out;
-	}
-
-	transports[tport].msg_handler = msg_handler;
-	transports[tport].event_handler = event_handler;
-	transports[tport].flags = 0;
-	transports[tport].refcnt = 0;
-
-register_out:
-	spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(scsi_nl_add_transport);
-
-
-/**
- * scsi_nl_remove_transport -
- *    Disable transport receiption of messages and events
- *
- * @tport:		transport deregistering handlers
- *
- **/
-void
-scsi_nl_remove_transport(u8 tport)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&scsi_nl_lock, flags);
-	if (scsi_nl_state & STATE_EHANDLER_BSY) {
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-		msleep(1);
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-	}
-
-	if (tport < SCSI_NL_MAX_TRANSPORTS) {
-		transports[tport].flags |= HANDLER_DELETING;
-
-		while (transports[tport].refcnt != 0) {
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			schedule_timeout_uninterruptible(HZ/4);
-			spin_lock_irqsave(&scsi_nl_lock, flags);
-		}
-		transports[tport].msg_handler = NULL;
-		transports[tport].event_handler = NULL;
-		transports[tport].flags = 0;
-	}
-
-	spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-	return;
-}
-EXPORT_SYMBOL_GPL(scsi_nl_remove_transport);
-
-
-/**
- * scsi_nl_add_driver -
- *    A driver is registering its interfaces for SCSI netlink messages
- *
- * @vendor_id:          A unique identification value for the driver.
- * @hostt:		address of the driver's host template. Used
- *			to verify an shost is bound to the driver
- * @nlmsg_handler:	receive message handler callback
- * @nlevt_handler:	receive event handler callback
- *
- * Returns:
- *   0 on Success
- *   error result otherwise
- **/
-int
-scsi_nl_add_driver(u64 vendor_id, struct scsi_host_template *hostt,
-	int (*nlmsg_handler)(struct Scsi_Host *shost, void *payload,
-				 u32 len, u32 pid),
-	void (*nlevt_handler)(struct notifier_block *nb,
-				 unsigned long event, void *notify_ptr))
-{
-	struct scsi_nl_drvr *driver;
-	unsigned long flags;
-
-	driver = kzalloc(sizeof(*driver), GFP_KERNEL);
-	if (unlikely(!driver)) {
-		printk(KERN_ERR "%s: allocation failure\n", __func__);
-		return -ENOMEM;
-	}
-
-	driver->dmsg_handler = nlmsg_handler;
-	driver->devt_handler = nlevt_handler;
-	driver->hostt = hostt;
-	driver->vendor_id = vendor_id;
-
-	spin_lock_irqsave(&scsi_nl_lock, flags);
-	if (scsi_nl_state & STATE_EHANDLER_BSY) {
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-		msleep(1);
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-	}
-	list_add_tail(&driver->next, &scsi_nl_drivers);
-	spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(scsi_nl_add_driver);
-
-
-/**
- * scsi_nl_remove_driver -
- *    An driver is unregistering with the SCSI netlink messages
- *
- * @vendor_id:          The unique identification value for the driver.
- **/
-void
-scsi_nl_remove_driver(u64 vendor_id)
-{
-	struct scsi_nl_drvr *driver;
-	unsigned long flags;
-
-	spin_lock_irqsave(&scsi_nl_lock, flags);
-	if (scsi_nl_state & STATE_EHANDLER_BSY) {
-		spin_unlock_irqrestore(&scsi_nl_lock, flags);
-		msleep(1);
-		spin_lock_irqsave(&scsi_nl_lock, flags);
-	}
-
-	list_for_each_entry(driver, &scsi_nl_drivers, next) {
-		if (driver->vendor_id == vendor_id) {
-			driver->flags |= HANDLER_DELETING;
-			while (driver->refcnt != 0) {
-				spin_unlock_irqrestore(&scsi_nl_lock, flags);
-				schedule_timeout_uninterruptible(HZ/4);
-				spin_lock_irqsave(&scsi_nl_lock, flags);
-			}
-			list_del(&driver->next);
-			kfree(driver);
-			spin_unlock_irqrestore(&scsi_nl_lock, flags);
-			return;
-		}
-	}
-
-	spin_unlock_irqrestore(&scsi_nl_lock, flags);
-
-	printk(KERN_ERR "%s: removal of driver failed - vendor_id 0x%llx\n",
-	       __func__, (unsigned long long)vendor_id);
-	return;
-}
-EXPORT_SYMBOL_GPL(scsi_nl_remove_driver);
-
-
 /**
  * scsi_netlink_init - Called by SCSI subsystem to initialize
  * 	the SCSI transport netlink interface
@@ -485,36 +125,19 @@ EXPORT_SYMBOL_GPL(scsi_nl_remove_driver);
 void
 scsi_netlink_init(void)
 {
-	int error;
 	struct netlink_kernel_cfg cfg = {
 		.input	= scsi_nl_rcv_msg,
 		.groups	= SCSI_NL_GRP_CNT,
 	};
 
-	INIT_LIST_HEAD(&scsi_nl_drivers);
-
-	error = netlink_register_notifier(&scsi_netlink_notifier);
-	if (error) {
-		printk(KERN_ERR "%s: register of event handler failed - %d\n",
-				__func__, error);
-		return;
-	}
-
 	scsi_nl_sock = netlink_kernel_create(&init_net, NETLINK_SCSITRANSPORT,
-					     THIS_MODULE, &cfg);
+					     &cfg);
 	if (!scsi_nl_sock) {
 		printk(KERN_ERR "%s: register of receive handler failed\n",
 				__func__);
-		netlink_unregister_notifier(&scsi_netlink_notifier);
 		return;
 	}
 
-	/* Register the entry points for the generic SCSI transport */
-	error = scsi_nl_add_transport(SCSI_NL_TRANSPORT,
-				scsi_generic_msg_handler, NULL);
-	if (error)
-		printk(KERN_ERR "%s: register of GENERIC transport handler"
-				"  failed - %d\n", __func__, error);
 	return;
 }
 
@@ -526,158 +149,10 @@ scsi_netlink_init(void)
 void
 scsi_netlink_exit(void)
 {
-	scsi_nl_remove_transport(SCSI_NL_TRANSPORT);
-
 	if (scsi_nl_sock) {
 		netlink_kernel_release(scsi_nl_sock);
-		netlink_unregister_notifier(&scsi_netlink_notifier);
 	}
 
 	return;
 }
 
-
-/*
- * Exported Interfaces
- */
-
-/**
- * scsi_nl_send_transport_msg -
- *    Generic function to send a single message from a SCSI transport to
- *    a single process
- *
- * @pid:		receiving pid
- * @hdr:		message payload
- *
- **/
-void
-scsi_nl_send_transport_msg(u32 pid, struct scsi_nl_hdr *hdr)
-{
-	struct sk_buff *skb;
-	struct nlmsghdr	*nlh;
-	const char *fn;
-	char *datab;
-	u32 len, skblen;
-	int err;
-
-	if (!scsi_nl_sock) {
-		err = -ENOENT;
-		fn = "netlink socket";
-		goto msg_fail;
-	}
-
-	len = NLMSG_SPACE(hdr->msglen);
-	skblen = NLMSG_SPACE(len);
-
-	skb = alloc_skb(skblen, GFP_KERNEL);
-	if (!skb) {
-		err = -ENOBUFS;
-		fn = "alloc_skb";
-		goto msg_fail;
-	}
-
-	nlh = nlmsg_put(skb, pid, 0, SCSI_TRANSPORT_MSG, len - sizeof(*nlh), 0);
-	if (!nlh) {
-		err = -ENOBUFS;
-		fn = "nlmsg_put";
-		goto msg_fail_skb;
-	}
-	datab = NLMSG_DATA(nlh);
-	memcpy(datab, hdr, hdr->msglen);
-
-	err = nlmsg_unicast(scsi_nl_sock, skb, pid);
-	if (err < 0) {
-		fn = "nlmsg_unicast";
-		/* nlmsg_unicast already kfree_skb'd */
-		goto msg_fail;
-	}
-
-	return;
-
-msg_fail_skb:
-	kfree_skb(skb);
-msg_fail:
-	printk(KERN_WARNING
-		"%s: Dropped Message : pid %d Transport %d, msgtype x%x, "
-		"msglen %d: %s : err %d\n",
-		__func__, pid, hdr->transport, hdr->msgtype, hdr->msglen,
-		fn, err);
-	return;
-}
-EXPORT_SYMBOL_GPL(scsi_nl_send_transport_msg);
-
-
-/**
- * scsi_nl_send_vendor_msg - called to send a shost vendor unique message
- *                      to a specific process id.
- *
- * @pid:		process id of the receiver
- * @host_no:		host # sending the message
- * @vendor_id:		unique identifier for the driver's vendor
- * @data_len:		amount, in bytes, of vendor unique payload data
- * @data_buf:		pointer to vendor unique data buffer
- *
- * Returns:
- *   0 on successful return
- *   otherwise, failing error code
- *
- * Notes:
- *	This routine assumes no locks are held on entry.
- */
-int
-scsi_nl_send_vendor_msg(u32 pid, unsigned short host_no, u64 vendor_id,
-			 char *data_buf, u32 data_len)
-{
-	struct sk_buff *skb;
-	struct nlmsghdr	*nlh;
-	struct scsi_nl_host_vendor_msg *msg;
-	u32 len, skblen;
-	int err;
-
-	if (!scsi_nl_sock) {
-		err = -ENOENT;
-		goto send_vendor_fail;
-	}
-
-	len = SCSI_NL_MSGALIGN(sizeof(*msg) + data_len);
-	skblen = NLMSG_SPACE(len);
-
-	skb = alloc_skb(skblen, GFP_KERNEL);
-	if (!skb) {
-		err = -ENOBUFS;
-		goto send_vendor_fail;
-	}
-
-	nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
-				skblen - sizeof(*nlh), 0);
-	if (!nlh) {
-		err = -ENOBUFS;
-		goto send_vendor_fail_skb;
-	}
-	msg = NLMSG_DATA(nlh);
-
-	INIT_SCSI_NL_HDR(&msg->snlh, SCSI_NL_TRANSPORT,
-				SCSI_NL_SHOST_VENDOR, len);
-	msg->vendor_id = vendor_id;
-	msg->host_no = host_no;
-	msg->vmsg_datalen = data_len;	/* bytes */
-	memcpy(&msg[1], data_buf, data_len);
-
-	err = nlmsg_unicast(scsi_nl_sock, skb, pid);
-	if (err)
-		/* nlmsg_multicast already kfree_skb'd */
-		goto send_vendor_fail;
-
-	return 0;
-
-send_vendor_fail_skb:
-	kfree_skb(skb);
-send_vendor_fail:
-	printk(KERN_WARNING
-		"%s: Dropped SCSI Msg : host %d vendor_unique - err %d\n",
-		__func__, host_no, err);
-	return err;
-}
-EXPORT_SYMBOL(scsi_nl_send_vendor_msg);
-
-