- 13 Feb, 2012 40 commits
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Andre Guedes authored
This is helpful for device discovery implementation & debuging. Signed-off-by:
Andre Guedes <andre.guedes@openbossa.org> Acked-by:
Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
Johan Hedberg <johan.hedberg@intel.com>
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Johan Hedberg authored
The correct length of the event is the size of the ev struct (not size of the pointer like the code was previously using) plus the length of the variable-sized EIR data at the end of the struct. Signed-off-by:
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Andre Guedes authored
This patch fixes a #define indentation in mgmt.c. Signed-off-by:
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Andre Guedes authored
This patch adds LE-Only discovery procedure support to MGMT Start Discovery command. Signed-off-by:
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Andre Guedes authored
We are not supposed to block in start_discovery() because start_discovery code is running in write() syscall context and this would block the write operation on the mgmt socket. This way, we cannot directly call hci_do_le_scan() to scan LE devices in start_discovery(). To overcome this issue a derefered work (hdev->le_scan) was created so we can properly call hci_do_le_scan(). The helper function hci_le_scan() simply set LE scan parameters and queue hdev->le_scan work. The work is queued on system_long_wq since it can sleep for a few seconds in the worst case (timeout). Signed-off-by:
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Andre Guedes authored
This patch adds to hci_core the hci_do_le_scan function which should be used to scan LE devices. In order to enable LE scan, hci_do_le_scan() sends commands (Set LE Scan Parameters and Set LE Scan Enable) to the controller and waits for its results. If commands were executed successfully a delayed work is scheduled to disable the ongoing scanning after some amount of time. This function blocks. Signed-off-by:
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Andre Guedes authored
This patch does a trivial code refacting in hci_discovery_active. Signed-off-by:
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Andre Guedes authored
Send MGMT Discovering events once LE scan starts/stops so the userspace can track when local adapters are discovering LE devices. This way, we also keep the same behavior of inquiry which sends MGMT Discovering events once inquiry starts/stops even if it is triggered by an external tool (e.g. hcitool). Signed-off-by:
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Johan Hedberg authored
We should only perform a reset in hci_dev_do_close if the HCI_QUIRK_NO_RESET flag is set (since in such a case a reset will not be performed when initializing the device). Signed-off-by:
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Andrei Emeltchenko authored
Use __check_timout helper to remove duplicated code Signed-off-by:
Andrei Emeltchenko <andrei.emeltchenko@intel.com> Reviewed-by:
Ulisses Furquim <ulisses@profusion.mobi> Acked-by:
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Andrei Emeltchenko authored
Split HCI scheduling for block and packet flow control. Signed-off-by:
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Vinicius Costa Gomes authored
If we want to have proper pairing support over LE we need to inform userspace that a new LTK is available, so userspace can store that key permanently. Signed-off-by:
Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Acked-by:
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Vinicius Costa Gomes authored
With the use of the new structures and lists for the SMP LTK's we may remove some code that is now unused. No need to have extra fields of information inside link_key now that it is only used for Link Keys. Signed-off-by:
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Vinicius Costa Gomes authored
Instead of having a separated command for removing SMP keys, we use the Remove Keys command to remove *all* keys. Signed-off-by:
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Vinicius Costa Gomes authored
This adds a method to notify that a new LTK is available and a handler to store keys coming from userspace into the kernel LTK list. Signed-off-by:
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Vinicius Costa Gomes authored
This updates all the users of the older way, that was using the link_keys list to store the SMP keys, to use the new way. This includes defining new types for the keys, we have a type for each combination of STK/LTK and Master/Slave. Signed-off-by:
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Vinicius Costa Gomes authored
This includes a new list for storing the keys and a new structure used to represent each key. Some notes: authenticated is used to identify that the key may be used to setup a HIGH security link. As the same list is used to store both the STK's and the LTK's the type field is used so we can separate between those two types of keys and if the key should be used when in the master or slave role. Signed-off-by:
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Vinicius Costa Gomes authored
Every command handler of mgmt does a cast to the command structure so it can properly interpreted. So we can avoid that cast if we make those functions receive a void * directly. Signed-off-by:
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Manoj Iyer authored
T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#= 5 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=ff(vend.) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=0a5c ProdID=21f3 Rev=01.12 S: Manufacturer=Broadcom Corp S: Product=BCM20702A0 S: SerialNumber=74DE2B344A7B C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=0mA I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=(none) I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=(none) I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none) Signed-off-by:
Manoj Iyer <manoj.iyer@canonical.com> Tested-by:
Dennis Chua <dennis.chua@canonical.com> Acked-by:
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Andrei Emeltchenko authored
Fixes possible bug when deleting element from the list in function hci_chan_list_flush. list_for_each_entry_rcu is used and after deleting element from the list we also free pointer and then list_entry_rcu is taken from freed pointer. Signed-off-by:
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Andrei Emeltchenko authored
Use list_for_each_entry_safe which is safe version against removal of list entry. Otherwise we remove hci_conn element and reference next element which result in accessing LIST_POISON. [ 95.571834] Bluetooth: unknown link type 127 [ 95.578349] BUG: unable to handle kernel paging request at 20002000 [ 95.580236] IP: [<20002000>] 0x20001fff [ 95.580763] *pde = 00000000 [ 95.581196] Oops: 0000 [#1] SMP ... [ 95.582298] Pid: 3355, comm: hciconfig Tainted: G O 3.2.0-VirttualBox [ 95.582298] EIP: 0060:[<20002000>] EFLAGS: 00210206 CPU: 0 [ 95.582298] EIP is at 0x20002000 ... [ 95.582298] Call Trace: [ 95.582298] [<f8231ab6>] ? hci_conn_hash_flush+0x76/0xf0 [bluetooth] [ 95.582298] [<f822bcb1>] hci_dev_do_close+0xc1/0x2e0 [bluetooth] [ 95.582298] [<f822d679>] ? hci_dev_get+0x69/0xb0 [bluetooth] [ 95.582298] [<f822e1da>] hci_dev_close+0x2a/0x50 [bluetooth] [ 95.582298] [<f824102f>] hci_sock_ioctl+0x1af/0x3f0 [bluetooth] [ 95.582298] [<c11153ea>] ? handle_pte_fault+0x8a/0x8f0 [ 95.582298] [<c146becf>] sock_ioctl+0x5f/0x260 [ 95.582298] [<c146be70>] ? sock_fasync+0x90/0x90 [ 95.582298] [<c1152b33>] do_vfs_ioctl+0x83/0x5b0 [ 95.582298] [<c1563f87>] ? do_page_fault+0x297/0x500 [ 95.582298] [<c1563cf0>] ? spurious_fault+0xd0/0xd0 [ 95.582298] [<c107165b>] ? up_read+0x1b/0x30 [ 95.582298] [<c1563f87>] ? do_page_fault+0x297/0x500 [ 95.582298] [<c100aa9f>] ? init_fpu+0xef/0x160 [ 95.582298] [<c15617c0>] ? do_debug+0x180/0x180 [ 95.582298] [<c100a958>] ? fpu_finit+0x28/0x80 [ 95.582298] [<c11530e7>] sys_ioctl+0x87/0x90 [ 95.582298] [<c156795f>] sysenter_do_call+0x12/0x38 ... Signed-off-by:
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Johan Hedberg authored
This patch implements the Cancel Pair Device command for mgmt. It's used by user space to cancel an ongoing pairing attempt which was triggered by the Pair Device command. Signed-off-by:
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Hemant Gupta authored
This patch fixes clearing of HCI_LINK_KEYS and HCI_DEBUG_KEYS dev_flags while resetting. Without this patch pairing does not work over management interface for BR-EDR devices. Signed-off-by:
Hemant Gupta <hemant.gupta@stericsson.com> Acked-by:
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Hemant Gupta authored
This patch sends correct IO Capability response to remote device in case Local Device supports KeyBoardDisplay IO Capability as this capability is not valid as per BT spec for IO capability Request Reply Command. This capability is mapped to DisplayYesNo which is in accordance with BT spec. Signed-off-by:
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Peter Hurley authored
Commit 33060542 fixed l2cap conn establishment for non-ssp remote devices by not setting HCI_CONN_ENCRYPT_PEND every time conn security is tested (which was always returning failure on any subsequent security checks). However, this broke l2cap conn establishment for ssp remote devices when an ACL link was already established at SDP-level security. This fix ensures that encryption must be pending whenever authentication is also pending. Signed-off-by:
Peter Hurley <peter@hurleysoftware.com> Tested-by:
Daniel Wagner <daniel.wagner@bmw-carit.de> Acked-by:
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Johan Hedberg authored
This patch updates the opcodes for mgmt commands and events to match the latest user space API specification. Signed-off-by:
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Vinicius Costa Gomes authored
We only should try to free the SMP channel that was created if there is a pending SMP session. Signed-off-by:
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Octavian Purdila authored
There is an imbalance in the rfcomm_session_hold / rfcomm_session_put operations which causes the following crash: [ 685.010159] BUG: unable to handle kernel paging request at 6b6b6b6b [ 685.010169] IP: [<c149d76d>] rfcomm_process_dlcs+0x1b/0x15e [ 685.010181] *pdpt = 000000002d665001 *pde = 0000000000000000 [ 685.010191] Oops: 0000 [#1] PREEMPT SMP [ 685.010247] [ 685.010255] Pid: 947, comm: krfcommd Tainted: G C 3.0.16-mid8-dirty #44 [ 685.010266] EIP: 0060:[<c149d76d>] EFLAGS: 00010246 CPU: 1 [ 685.010274] EIP is at rfcomm_process_dlcs+0x1b/0x15e [ 685.010281] EAX: e79f551c EBX: 6b6b6b6b ECX: 00000007 EDX: e79f40b4 [ 685.010288] ESI: e79f4060 EDI: ed4e1f70 EBP: ed4e1f68 ESP: ed4e1f50 [ 685.010295] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 685.010303] Process krfcommd (pid: 947, ti=ed4e0000 task=ed43e5e0 task.ti=ed4e0000) [ 685.010308] Stack: [ 685.010312] ed4e1f68 c149eb53 e5925150 e79f4060 ed500000 ed4e1f70 ed4e1f80 c149ec10 [ 685.010331] 00000000 ed43e5e0 00000000 ed4e1f90 ed4e1f9c c149ec87 0000bf54 00000000 [ 685.010348] 00000000 ee03bf54 c149ec37 ed4e1fe4 c104fe01 00000000 00000000 00000000 [ 685.010367] Call Trace: [ 685.010376] [<c149eb53>] ? rfcomm_process_rx+0x6e/0x74 [ 685.010387] [<c149ec10>] rfcomm_process_sessions+0xb7/0xde [ 685.010398] [<c149ec87>] rfcomm_run+0x50/0x6d [ 685.010409] [<c149ec37>] ? rfcomm_process_sessions+0xde/0xde [ 685.010419] [<c104fe01>] kthread+0x63/0x68 [ 685.010431] [<c104fd9e>] ? __init_kthread_worker+0x42/0x42 [ 685.010442] [<c14dae82>] kernel_thread_helper+0x6/0xd This issue has been brought up earlier here: https://lkml.org/lkml/2011/5/21/127 The issue appears to be the rfcomm_session_put in rfcomm_recv_ua. This operation doesn't seem be to required as for the non-initiator case we have the rfcomm_process_rx doing an explicit put and in the initiator case the last dlc_unlink will drive the reference counter to 0. There have been several attempts to fix these issue: 6c2718da Bluetooth: Do not call rfcomm_session_put() for RFCOMM UA on closed socket 683d949a Bluetooth: Never deallocate a session when some DLC points to it but AFAICS they do not fix the issue just make it harder to reproduce. Signed-off-by:
Octavian Purdila <octavian.purdila@intel.com> Signed-off-by:
Gopala Krishna Murala <gopala.krishna.murala@intel.com> Acked-by:
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Andre Guedes authored
This function is not called in interrupt context anymore, so it should use GFP_KERNEL to allocate memory. Signed-off-by:
Andre Guedes <aguedespe@gmail.com> Acked-by:
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Vinicius Costa Gomes authored
This makes clear that this is the size of the key used to encrypt the link. Signed-off-by:
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Vinicius Costa Gomes authored
This defines two new messages, one event that will inform userspace that a new Long Term Key was exchanged and one that will allow userspace to load LTKs into the kernel. Besides the information necessary for the restablishement of the secure link, we added some extra information: "authenticated" that informs if the key can be used to establish an authenticated link, and "master" that informs the role in that the key should be used. Signed-off-by:
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Ulisses Furquim authored
We need to use the _sync() version for cancelling the info and security timer in the L2CAP connection delete path. Otherwise the delayed work handler might run after the connection object is freed. Signed-off-by:
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Ulisses Furquim authored
__cancel_delayed_work() is being used in some paths where we cannot sleep waiting for the delayed work to finish. However, that function might return while the timer is running and the work will be queued again. Replace the calls with safer cancel_delayed_work() version which spins until the timer handler finishes on other CPUs and cancels the delayed work. Signed-off-by:
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Andre Guedes authored
We don't need locking hdev in hci_conn_timeout() since it doesn't access any hdev's shared resources, it basically queues HCI commands. Signed-off-by:
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Andre Guedes authored
We don't need to use the _sync variant in hci_conn_hold and hci_conn_put to cancel conn->disc_work delayed work. This way we avoid potential deadlocks like this one reported by lockdep. ====================================================== [ INFO: possible circular locking dependency detected ] 3.2.0+ #1 Not tainted ------------------------------------------------------- kworker/u:1/17 is trying to acquire lock: (&hdev->lock){+.+.+.}, at: [<ffffffffa0041155>] hci_conn_timeout+0x62/0x158 [bluetooth] but task is already holding lock: ((&(&conn->disc_work)->work)){+.+...}, at: [<ffffffff81035751>] process_one_work+0x11a/0x2bf which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 ((&(&conn->disc_work)->work)){+.+...}: [<ffffffff81057444>] lock_acquire+0x8a/0xa7 [<ffffffff81034ed1>] wait_on_work+0x3d/0xaa [<ffffffff81035b54>] __cancel_work_timer+0xac/0xef [<ffffffff81035ba4>] cancel_delayed_work_sync+0xd/0xf [<ffffffffa00554b0>] smp_chan_create+0xde/0xe6 [bluetooth] [<ffffffffa0056160>] smp_conn_security+0xa3/0x12d [bluetooth] [<ffffffffa0053640>] l2cap_connect_cfm+0x237/0x2e8 [bluetooth] [<ffffffffa004239c>] hci_proto_connect_cfm+0x2d/0x6f [bluetooth] [<ffffffffa0046ea5>] hci_event_packet+0x29d1/0x2d60 [bluetooth] [<ffffffffa003dde3>] hci_rx_work+0xd0/0x2e1 [bluetooth] [<ffffffff810357af>] process_one_work+0x178/0x2bf [<ffffffff81036178>] worker_thread+0xce/0x152 [<ffffffff81039a03>] kthread+0x95/0x9d [<ffffffff812e7754>] kernel_thread_helper+0x4/0x10 -> #1 (slock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}: [<ffffffff81057444>] lock_acquire+0x8a/0xa7 [<ffffffff812e553a>] _raw_spin_lock_bh+0x36/0x6a [<ffffffff81244d56>] lock_sock_nested+0x24/0x7f [<ffffffffa004d96f>] lock_sock+0xb/0xd [bluetooth] [<ffffffffa0052906>] l2cap_chan_connect+0xa9/0x26f [bluetooth] [<ffffffffa00545f8>] l2cap_sock_connect+0xb3/0xff [bluetooth] [<ffffffff81243b48>] sys_connect+0x69/0x8a [<ffffffff812e6579>] system_call_fastpath+0x16/0x1b -> #0 (&hdev->lock){+.+.+.}: [<ffffffff81056d06>] __lock_acquire+0xa80/0xd74 [<ffffffff81057444>] lock_acquire+0x8a/0xa7 [<ffffffff812e3870>] __mutex_lock_common+0x48/0x38e [<ffffffff812e3c75>] mutex_lock_nested+0x2a/0x31 [<ffffffffa0041155>] hci_conn_timeout+0x62/0x158 [bluetooth] [<ffffffff810357af>] process_one_work+0x178/0x2bf [<ffffffff81036178>] worker_thread+0xce/0x152 [<ffffffff81039a03>] kthread+0x95/0x9d [<ffffffff812e7754>] kernel_thread_helper+0x4/0x10 other info that might help us debug this: Chain exists of: &hdev->lock --> slock-AF_BLUETOOTH-BTPROTO_L2CAP --> (&(&conn->disc_work)->work) Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((&(&conn->disc_work)->work)); lock(slock-AF_BLUETOOTH-BTPROTO_L2CAP); lock((&(&conn->disc_work)->work)); lock(&hdev->lock); *** DEADLOCK *** 2 locks held by kworker/u:1/17: #0: (hdev->name){.+.+.+}, at: [<ffffffff81035751>] process_one_work+0x11a/0x2bf #1: ((&(&conn->disc_work)->work)){+.+...}, at: [<ffffffff81035751>] process_one_work+0x11a/0x2bf stack backtrace: Pid: 17, comm: kworker/u:1 Not tainted 3.2.0+ #1 Call Trace: [<ffffffff812e06c6>] print_circular_bug+0x1f8/0x209 [<ffffffff81056d06>] __lock_acquire+0xa80/0xd74 [<ffffffff81021ef2>] ? arch_local_irq_restore+0x6/0xd [<ffffffff81022bc7>] ? vprintk+0x3f9/0x41e [<ffffffff81057444>] lock_acquire+0x8a/0xa7 [<ffffffffa0041155>] ? hci_conn_timeout+0x62/0x158 [bluetooth] [<ffffffff812e3870>] __mutex_lock_common+0x48/0x38e [<ffffffffa0041155>] ? hci_conn_timeout+0x62/0x158 [bluetooth] [<ffffffff81190fd6>] ? __dynamic_pr_debug+0x6d/0x6f [<ffffffffa0041155>] ? hci_conn_timeout+0x62/0x158 [bluetooth] [<ffffffff8105320f>] ? trace_hardirqs_off+0xd/0xf [<ffffffff812e3c75>] mutex_lock_nested+0x2a/0x31 [<ffffffffa0041155>] hci_conn_timeout+0x62/0x158 [bluetooth] [<ffffffff810357af>] process_one_work+0x178/0x2bf [<ffffffff81035751>] ? process_one_work+0x11a/0x2bf [<ffffffff81055af3>] ? lock_acquired+0x1d0/0x1df [<ffffffffa00410f3>] ? hci_acl_disconn+0x65/0x65 [bluetooth] [<ffffffff81036178>] worker_thread+0xce/0x152 [<ffffffff810407ed>] ? finish_task_switch+0x45/0xc5 [<ffffffff810360aa>] ? manage_workers.isra.25+0x16a/0x16a [<ffffffff81039a03>] kthread+0x95/0x9d [<ffffffff812e7754>] kernel_thread_helper+0x4/0x10 [<ffffffff812e5db4>] ? retint_restore_args+0x13/0x13 [<ffffffff8103996e>] ? __init_kthread_worker+0x55/0x55 [<ffffffff812e7750>] ? gs_change+0x13/0x13 Signed-off-by: -
Andre Guedes authored
This function is called in process context only, so it should use GFP_KERNEL to allocate memory. Signed-off-by:
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Andre Guedes authored
This function is called in process context only, so it should use GFP_KERNEL to allocate memory. Signed-off-by:
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Szymon Janc authored
It is not used outside of l2cap_core.c. Also l2cap_ertm_data_rcv is only used after it is defined so there is no need for forward declaration. Signed-off-by:
Szymon Janc <szymon.janc@tieto.com> Acked-by:
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Andrei Emeltchenko authored
Add channel-specific skb allocation method Signed-off-by:
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Octavian Purdila authored
Since bluetooth uses multiple protocols types, to avoid lockdep warnings, we need to use different lockdep classes (one for each protocol type). This is already done in bt_sock_create but it misses a couple of cases when new connections are created. This patch corrects that to fix the following warning: <4>[ 1864.732366] ======================================================= <4>[ 1864.733030] [ INFO: possible circular locking dependency detected ] <4>[ 1864.733544] 3.0.16-mid3-00007-gc9a0f62 #3 <4>[ 1864.733883] ------------------------------------------------------- <4>[ 1864.734408] t.android.btclc/4204 is trying to acquire lock: <4>[ 1864.734869] (rfcomm_mutex){+.+.+.}, at: [<c14970ea>] rfcomm_dlc_close+0x15/0x30 <4>[ 1864.735541] <4>[ 1864.735549] but task is already holding lock: <4>[ 1864.736045] (sk_lock-AF_BLUETOOTH){+.+.+.}, at: [<c1498bf7>] lock_sock+0xa/0xc <4>[ 1864.736732] <4>[ 1864.736740] which lock already depends on the new lock. <4>[ 1864.736750] <4>[ 1864.737428] <4>[ 1864.737437] the existing dependency chain (in reverse order) is: <4>[ 1864.738016] <4>[ 1864.738023] -> #1 (sk_lock-AF_BLUETOOTH){+.+.+.}: <4>[ 1864.738549] [<c1062273>] lock_acquire+0x104/0x140 <4>[ 1864.738977] [<c13d35c1>] lock_sock_nested+0x58/0x68 <4>[ 1864.739411] [<c1493c33>] l2cap_sock_sendmsg+0x3e/0x76 <4>[ 1864.739858] [<c13d06c3>] __sock_sendmsg+0x50/0x59 <4>[ 1864.740279] [<c13d0ea2>] sock_sendmsg+0x94/0xa8 <4>[ 1864.740687] [<c13d0ede>] kernel_sendmsg+0x28/0x37 <4>[ 1864.741106] [<c14969ca>] rfcomm_send_frame+0x30/0x38 <4>[ 1864.741542] [<c1496a2a>] rfcomm_send_ua+0x58/0x5a <4>[ 1864.741959] [<c1498447>] rfcomm_run+0x441/0xb52 <4>[ 1864.742365] [<c104f095>] kthread+0x63/0x68 <4>[ 1864.742742] [<c14d5182>] kernel_thread_helper+0x6/0xd <4>[ 1864.743187] <4>[ 1864.743193] -> #0 (rfcomm_mutex){+.+.+.}: <4>[ 1864.743667] [<c1061ada>] __lock_acquire+0x988/0xc00 <4>[ 1864.744100] [<c1062273>] lock_acquire+0x104/0x140 <4>[ 1864.744519] [<c14d2c70>] __mutex_lock_common+0x3b/0x33f <4>[ 1864.744975] [<c14d303e>] mutex_lock_nested+0x2d/0x36 <4>[ 1864.745412] [<c14970ea>] rfcomm_dlc_close+0x15/0x30 <4>[ 1864.745842] [<c14990d9>] __rfcomm_sock_close+0x5f/0x6b <4>[ 1864.746288] [<c1499114>] rfcomm_sock_shutdown+0x2f/0x62 <4>[ 1864.746737] [<c13d275d>] sys_socketcall+0x1db/0x422 <4>[ 1864.747165] [<c14d42f0>] syscall_call+0x7/0xb Signed-off-by:
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