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2015-10-21bluetooth: 6lowpan: use lowpan dispatch helpersAlexander Aring
This patch adds a check if the dataroom of skb contains a dispatch value by checking if skb->len != 0. This patch also change the dispatch evaluation by the recently introduced helpers for checking the common 6LoWPAN dispatch values for IPv6 and IPHC header. There was also a forgotten else branch which should drop the packet if no matching dispatch is available. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-086lowpan: move shared settings to lowpan_netdev_setupAlexander Aring
This patch moves values for all lowpan interface to the shared implementation of 6lowpan. This patch also quietly fixes the forgotten IFF_NO_QUEUE flag for the bluetooth 6LoWPAN interface. An identically commit is 4afbc0d ("net: 6lowpan: convert to using IFF_NO_QUEUE") which wasn't changed for bluetooth 6lowpan. All 6lowpan interfaces should be virtual with IFF_NO_QUEUE, using EUI64 address length, the mtu size is 1280 (IPV6_MIN_MTU) and the netdev type is ARPHRD_6LOWPAN. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Remove unnecessary chan_get() functionJohan Hedberg
The chan_get() function just adds unnecessary indirection to calling the chan_create() call. The only added value it gives is the chan->ops assignment, but that can equally well be done in the calling code. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Rename confusing 'pchan' variablesJohan Hedberg
The typical convention when having both a child and a parent channel variable is to call the former 'chan' and the latter 'pchan'. When there's only one variable it's called chan. Rename the 'pchan' variables in the 6lowpan code to follow this convention. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Remove unnecessary chan_open() functionJohan Hedberg
All the chan_open() function now does is to call chan_create() so it doesn't really add any value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Remove redundant BT_CONNECTED assignmentJohan Hedberg
The L2CAP core code makes sure of setting the channel state to BT_CONNECTED, so there's no need for the implementation code (6lowpan in this case) to do it. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Remove redundant (and incorrect) MPS assignmentsJohan Hedberg
The L2CAP core code already sets the local MPS to a sane value. The remote MPS value otoh comes from the remote side so there's no point in trying to hard-code it to any value. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-08Bluetooth: 6lowpan: Fix imtu & omtu valuesJohan Hedberg
The omtu value is determined by the remote peer so there's no point in trying to hard-code it to any value. The IPSP specification otoh gives a more reasonable value for the imtu, i.e. 1280. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-08-116lowpan: add generic 6lowpan netdev private dataAlexander Aring
This patch introduced the 6lowpan netdev private data struct. We name it lowpan_priv and it's placed at the beginning of netdev private data. All lowpan interfaces should allocate this room at first of netdev private data. 6LoWPAN LL private data can be allocate by additional netdev private data, e.g. dev->priv_size should be "sizeof(struct lowpan_priv) + sizeof(LL_LOWPAN_PRIVATE_DATA)". Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-08-11Bluetooth: 6lowpan: change netdev_priv to lowpan_devAlexander Aring
The usually way to get the btle lowpan private data is to use the introduced lowpan_dev inline function. This patch will cleanup by using lowpan_dev consequently. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-07-30Bluetooth: 6lowpan: Fix possible raceAlexander Aring
This patch fix a possible race after calling register_netdev. After calling netdev_register it could be possible that netdev_ops callbacks use the uninitialized private data of lowpan_dev. By moving the initialization of this data before netdev_register we can be sure that initialized private data is be used after netdev_register. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-17Bluetooth: 6lowpan: Fix module refcountGlenn Ruben Bakke
This patch removes the additional module_put() in disconnect_all_peers() making a correct module refcount so that the module can be removed after disabling 6lowpan through debugfs. Signed-off-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Glenn Ruben Bakke <glenn.ruben.bakke@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-17Bluetooth: 6lowpan: Fix double kfree of netdev privGlenn Ruben Bakke
This patch removes the kfree of the netdev priv in device_event() upon NETDEV_UNREGISTER event. The freeing of memory is taken care of by the netdev destructor. Signed-off-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Glenn Ruben Bakke <glenn.ruben.bakke@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-17Bluetooth: 6lowpan: Move netdev sysfs device referenceGlenn Ruben Bakke
This patch moves the sysfs device used by the netdev from the device of the first connected peer to the hci sysfs device. Using the sysfs device of hci instead of the first connected device fixes this issue such that the sysfs group of tx-0 and bt0 kobject are still present after the last peer has been deleted and all sysfs entries can be removed. Signed-off-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Glenn Ruben Bakke <glenn.ruben.bakke@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-17Bluetooth: 6lowpan: Rename ambiguous variableGlenn Ruben Bakke
This patch renames the variable used to trigger scheduling of delete_netdev. Changed to infinitiv in order to describe the action to be done. Signed-off-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Glenn Ruben Bakke <glenn.ruben.bakke@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-06-17Bluetooth: 6lowpan: Enable delete_netdev to be scheduled when last peer is ↵Glenn Ruben Bakke
deleted This patch fixes an issue with the netdev not being unregistered when the last peer is deleted. Removing the logical negation operator on the boolean solves this issue. If the last peer is removed the condition will be true, and the delete_netdev() is scheduled. Signed-off-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Glenn Ruben Bakke <glenn.ruben.bakke@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-05-25ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCASTMartin KaFai Lau
When creating a RTF_CACHE route, RTF_ANYCAST is set based on rt6i_dst. Also, rt6i_gateway is always set to the nexthop while the nexthop could be a gateway or the rt6i_dst.addr. After removing the rt6i_dst and rt6i_src dependency in the last patch, we also need to stop the caller from depending on rt6i_gateway and RTF_ANYCAST. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-14Bluetooth: 6lowpan: Remove PSM setting codeJukka Rissanen
Removing PSM setting debugfs interface as the IPSP has a well defined PSM value that should be used. The patch introduces enable flag that can be used to toggle 6lowpan on/off. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-19Bluetooth: 6lowpan: Do not free skb when packet is droppedJukka Rissanen
If we need to drop the message because of some error in the compression etc, then do not free the skb as that is done automatically in other part of networking stack. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-12-09first fruits - kill l2cap ->memcpy_fromiovec()Al Viro
Just use copy_from_iter(). That's what this method is trying to do in all cases, in a very convoluted fashion. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-09put iov_iter into msghdrAl Viro
Note that the code _using_ ->msg_iter at that point will be very unhappy with anything other than unshifted iovec-backed iov_iter. We still need to convert users to proper primitives. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-13Bluetooth: Fix correct nesting for 6lowpan server channelJohan Hedberg
Server channels in BT_LISTEN state should use L2CAP_NESTING_PARENT. This patch fixes the nesting value for the 6lowpan channel. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-11Bluetooth: 6lowpan: Remove unnecessary RCU callbackJohan Hedberg
When kfree() is all that's needed to free an object protected by RCU there's a kfree_rcu() convenience function that can be used. This patch updates the 6lowpan code to use this, thereby eliminating the need for the separate peer_free() function. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-11-08Bluetooth: 6lowpan: fix skb_unshare behaviourAlexander Aring
This patch reverts commit: a7807d73 ("Bluetooth: 6lowpan: Avoid memory leak if memory allocation fails") which was wrong suggested by Alexander Aring. The function skb_unshare run also kfree_skb on failure. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.18.x
2014-11-066lowpan: move skb_free from error paths in decompressionMartin Townsend
Currently we ensure that the skb is freed on every error path in IPHC decompression which makes it easy to introduce skb leaks. By centralising the skb_free into the receive function it makes future decompression routines easier to maintain. It does come at the expense of ensuring that the skb passed into the decompression routine must not be copied. Signed-off-by: Martin Townsend <mtownsend1973@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-30Bluetooth: 6lowpan: use after free in disconnect_devices()Dan Carpenter
This was accidentally changed from list_for_each_entry_safe() to list_for_each_entry() so now it has a use after free bug. I've changed it back. Fixes: 90305829635d ('Bluetooth: 6lowpan: Converting rwlocks to use RCU') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28Bluetooth: 6lowpan: Fix lockdep splatsJukka Rissanen
When a device ndo_start_xmit() calls again dev_queue_xmit(), lockdep can complain because dev_queue_xmit() is re-entered and the spinlocks protecting tx queues share a common lockdep class. Same issue was fixed for ieee802154 in commit "20e7c4e80dcd" Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-28Bluetooth: 6lowpan: Converting rwlocks to use RCUJukka Rissanen
The rwlocks are converted to use RCU. This helps performance as the irq locks are not needed any more. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-27ieee802154: 6lowpan: rename process_data and lowpan_process_dataMartin Townsend
As we have decouple decompression from data delivery we can now rename all occurences of process_data in receive path. Signed-off-by: Martin Townsend <mtownsend1973@gmail.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-27bluetooth:6lowpan: use consume_skb when packet processed successfullyMartin Townsend
Signed-off-by: Martin Townsend <mtownsend1973@gmail.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-276lowpan: fix process_data return valuesMartin Townsend
As process_data now returns just error codes fix up the calls to this function to only drop the skb if an error code is returned. Signed-off-by: Martin Townsend <mtownsend1973@gmail.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-276lowpan: remove skb_deliver from IPHCMartin Townsend
Separating skb delivery from decompression ensures that we can support further decompression schemes and removes the mixed return value of error codes with NET_RX_FOO. Signed-off-by: Martin Townsend <mtownsend1973@gmail.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-256lowpan: Use skb_cow in IPHC decompression.Martin Townsend
Currently there are potentially 2 skb_copy_expand calls in IPHC decompression. This patch replaces this with one call to skb_cow which will check to see if there is enough headroom first to ensure it's only done if necessary and will handle alignment issues for cache. As skb_cow uses pskb_expand_head we ensure the skb isn't shared from bluetooth and ieee802.15.4 code that use the IPHC decompression. Signed-off-by: Martin Townsend <martin.townsend@xsilon.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-25Bluetooth: 6lowpan: remove unnecessary codes in give_skb_to_upperLi RongQing
netif_rx() only returns NET_RX_DROP and NET_RX_SUCCESS, not returns negative value Signed-off-by: Li RongQing <roy.qing.li@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-10-02Bluetooth: 6lowpan: Check transmit errors for multicast packetsJukka Rissanen
We did not return error if multicast packet transmit failed. This might not be desired so return error also in this case. If there are multiple 6lowpan devices where the multicast packet is sent, then return error even if sending to only one of them fails. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-10-02Bluetooth: 6lowpan: Return EAGAIN error also for multicast packetsJukka Rissanen
Make sure that we are able to return EAGAIN from l2cap_chan_send() even for multicast packets. The error code was ignored unncessarily. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-10-02Bluetooth: 6lowpan: Avoid memory leak if memory allocation failsJukka Rissanen
If skb_unshare() returns NULL, then we leak the original skb. Solution is to use temp variable to hold the new skb. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-10-02Bluetooth: 6lowpan: Memory leak as the skb is not freedJukka Rissanen
The earlier multicast commit 36b3dd250dde ("Bluetooth: 6lowpan: Ensure header compression does not corrupt IPv6 header") lost one skb free which then caused memory leak. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-09-29Bluetooth: 6lowpan: Enable multicast supportJukka Rissanen
Set multicast support for 6lowpan network interface. This is needed in every network interface that supports IPv6. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-29Bluetooth: 6lowpan: Ensure header compression does not corrupt IPv6 headerJukka Rissanen
If skb is going to multiple destinations, then make sure that we do not overwrite the common IPv6 headers. So before compressing the IPv6 headers, we copy the skb and that is then sent to 6LoWPAN Bluetooth devices. This is a similar patch as what was done for IEEE 802.154 6LoWPAN in commit f19f4f9525cf3 ("ieee802154: 6lowpan: ensure header compression does not corrupt ipv6 header") Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-29Bluetooth: 6lowpan: Make sure skb exists before accessing itJukka Rissanen
We need to make sure that the saved skb exists when resuming or suspending a CoC channel. This can happen if initial credits is 0 when channel is connected. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-09-09Bluetooth: 6lowpan: Route packets that are not meant to peer via correct deviceJukka Rissanen
Packets that are supposed to be delivered via the peer device need to be checked and sent to correct device. This requires that user has set the routes properly so that the 6lowpan module can then figure out the destination gateway and the correct Bluetooth device. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.17.x
2014-09-09Bluetooth: 6lowpan: Set the peer IPv6 address correctlyJukka Rissanen
The peer IPv6 address contained wrong U/L bit in the EUI-64 part. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.17.x
2014-09-09Bluetooth: 6lowpan: Increase the connection timeout valueJukka Rissanen
Use the default connection timeout value defined in l2cap.h because the current timeout was too short and most of the time the connection attempts timed out. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Cc: stable@vger.kernel.org # 3.17.x
2014-08-14Bluetooth: Fix confusion between parent and child channel for 6lowpanJohan Hedberg
The new_connection L2CAP channel callback creates a new channel based on the provided parent channel. The 6lowpan code was confusingly naming the child channel "pchan" and the parent channel "chan". This patch swaps the names. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-15net: set name_assign_type in alloc_netdev()Tom Gundersen
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert all users to pass NET_NAME_UNKNOWN. Coccinelle patch: @@ expression sizeof_priv, name, setup, txqs, rxqs, count; @@ ( -alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs) +alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs) | -alloc_netdev_mq(sizeof_priv, name, setup, count) +alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count) | -alloc_netdev(sizeof_priv, name, setup) +alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup) ) v9: move comments here from the wrong commit Signed-off-by: Tom Gundersen <teg@jklm.no> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-03Bluetooth: 6LoWPAN: Remove network devices when unloadingJukka Rissanen
When the module is unloaded, unregister the network device so that the system does not try to access non-existing device. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-03Bluetooth: 6LoWPAN: Count module usageJukka Rissanen
Count how many 6LoWPAN connections there exists so that we do not unload the module if there are still connections alive. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-03Bluetooth: 6LoWPAN: Create a kernel moduleJukka Rissanen
Instead of adding the 6LoWPAN functionality to Bluetooth module, we create a separate kernel module for it. Usage: In the slave side do this: $ modprobe bluetooth_6lowpan $ echo 62 > /sys/kernel/debug/bluetooth/6lowpan_psm $ hciconfig hci0 leadv In the master side do this: $ modprobe bluetooth_6lowpan $ echo 62 > /sys/kernel/debug/bluetooth/6lowpan_psm $ echo 'connect E0:06:E6:B7:2A:73 1' > \ /sys/kernel/debug/bluetooth/6lowpan_control The 6LoWPAN functionality can be controlled by psm value. If it is left to 0, then the module is disabled and all the 6LoWPAN connections are dropped if there were any. In the above example, the psm value is just an example and not a real value for 6LoWPAN service. The real psm value is yet to be defined in Bluetooth specification. The 6lowpan controlling interface is a temporary solution until the specifications are ready. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2014-07-03Bluetooth: 6LoWPAN: Use connected oriented channel instead of fixed oneJukka Rissanen
Create a CoC dynamically instead of one fixed channel for communication to peer devices. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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