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2010-09-23net: return operator cleanupEric Dumazet
Change "return (EXPR);" to "return EXPR;" return is not a function, parentheses are not required. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-06net: poll() optimizationsEric Dumazet
No need to test twice sk->sk_shutdown & RCV_SHUTDOWN Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-10Bluetooth: Fix incorrect setting of remote_tx_win for L2CAP ERTMMat Martineau
remote_tx_win is intended to be set on receipt of an L2CAP configuration request. The value is used to determine the size of the transmit window on the remote side of an ERTM connection, so L2CAP can stop sending frames when that remote window is full. An incorrect remote_tx_win value will cause the stack to not fully utilize the tx window (performance impact), or to overfill the remote tx window (causing dropped frames or a disconnect). This patch removes an extra setting of remote_tx_win when a configuration response is received. The transmit window has a different meaning in a response - it is an informational value less than or equal to the local tx_win. Signed-off-by: Mat Martineau <mathewm@codeaurora.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-08-10Bluetooth: Fix endianness issue with L2CAP MPS configurationMat Martineau
Incoming configuration values must be converted to native CPU order before use. This fixes a bug where a little-endian MPS value is compared to a native CPU value. On big-endian processors, this can cause ERTM and streaming mode segmentation to produce PDUs that are larger than the remote stack is expecting, or that would produce fragmented skbs that the current FCS code cannot handle. Signed-off-by: Mat Martineau <mathewm@codeaurora.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-08-04Bluetooth: Check result code of L2CAP information responseVille Tervo
Check result code of L2CAP information response. Otherwise it would read invalid feature mask and access invalid memory. Signed-off-by: Ville Tervo <ville.tervo@nokia.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-08-04Bluetooth: Don't send RFC for Basic Mode if only it is supportedGustavo F. Padovan
If the remote side doesn't support Enhanced Retransmission Mode neither Streaming Mode, we shall not send the RFC option. Some devices that only supports Basic Mode do not understanding the RFC option. This patch fixes the regression found with these devices. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-31Bluetooth: Remove __exit from rfcomm_cleanup_ttys()Gustavo F. Padovan
rfcomm_cleanup_ttys() is also called from rfcomm_init(), so it can't have __exit. Reported-by: Mat Martineau <mathewm@codeaurora.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-31Bluetooth: Use list_head for HCI blacklist headDavid Miller
The bdaddr in the list root is completely unused and just taking up space. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Johan Hedberg <johan.hedberg@nokia.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-27Bluetooth: Add __init and __exit marks to RFCOMMGustavo F. Padovan
Those annotation save memory and space on the binary. __init code is discarded just after execute and __exit code is discarded if the module is built into the kernel image or unload of modules is not allowed. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-27Bluetooth: Test 'count' value before enter the loopGustavo F. Padovan
Testing first we avoid enter the loop when count = 0. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-27Bluetooth: Defer SCO setup if mode change is pendingMarcel Holtmann
Certain headsets such as the Motorola H350 will reject SCO and eSCO connection requests while the ACL is transitioning from sniff mode to active mode. Add synchronization so that SCO and eSCO connection requests will wait until the ACL has fully transitioned to active mode. < HCI Command: Exit Sniff Mode (0x02|0x0004) plen 2 handle 12 > HCI Event: Command Status (0x0f) plen 4 Exit Sniff Mode (0x02|0x0004) status 0x00 ncmd 1 < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 handle 12 voice setting 0x0040 > HCI Event: Command Status (0x0f) plen 4 Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1 > HCI Event: Number of Completed Packets (0x13) plen 5 handle 12 packets 1 > HCI Event: Mode Change (0x14) plen 6 status 0x00 handle 12 mode 0x00 interval 0 Mode: Active > HCI Event: Synchronous Connect Complete (0x2c) plen 17 status 0x10 handle 14 bdaddr 00:1A:0E:50:28:A4 type SCO Error: Connection Accept Timeout Exceeded Signed-off-by: Ron Shaffer <rshaffer@codeaurora.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Enable L2CAP Extended features by defaultGustavo F. Padovan
Change the enable_ertm param to disable_ertm and default value to 0. That means that L2CAP Extended features are enabled by default now. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix typo in hci_event.cGustavo F. Padovan
memmory -> memory Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Add Google's copyright to L2CAPGustavo F. Padovan
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Implemented HCI frame reassembly for RX from streamSuraj Sumangala
Implemented frame reassembly implementation for reassembling fragments received from stream. Signed-off-by: Suraj Sumangala <suraj@atheros.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Modified hci_recv_fragment() to use hci_reassembly helperSuraj Sumangala
Modified packet based reassembly function hci_recv_fragment() to use hci_reassembly() Signed-off-by: Suraj Sumangala <suraj@atheros.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Implement hci_reassembly helper to reassemble RX packetsSuraj Sumangala
Implements feature to reassemble received HCI frames from any input stream Signed-off-by: Suraj Sumangala <suraj@atheros.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Add one more buffer for HCI stream reassemblySuraj Sumangala
Additional reassembly buffer to keep track of stream reasembly Signed-off-by: Suraj Sumangala <suraj@atheros.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Update L2CAP version informationGustavo F. Padovan
We did some changes on the L2CAP configuration process and its behaviour is bit different now. That justifies a updated on the L2CAP version. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Add Copyright notice to L2CAPGustavo F. Padovan
Copyright for the time I worked on L2CAP during the Google Summer of Code program. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Keep code under column 80Gustavo F. Padovan
Purely a cosmetic change, it doesn't change the code flow. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix bug in kzalloc allocation sizeGustavo F. Padovan
Probably a typo error. We were using the wrong struct to get size. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Send ConfigReq after send a ConnectionRspGustavo F. Padovan
The extended L2CAP features requires that one should initiate a ConfigReq after send the ConnectionRsp. This patch changes the behaviour of the configuration process of our stack. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix error return on L2CAP-HCI interface.João Paulo Rechi Vita
L2CAP only deals with ACL links. EINVAL should be returned otherwise. Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix error value for wrong FCS.João Paulo Rechi Vita
Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix error return for l2cap_connect_rsp().João Paulo Rechi Vita
Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix error return value on sendmsg.João Paulo Rechi Vita
When the socket is in a bad state EBADFD is more appropriate then EINVAL. Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix error return value on sendmsg.João Paulo Rechi Vita
When we try to send a message bigger than the outgoing MTU value EMSGSIZE (message too long) should be returned. Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Make l2cap_streaming_send() void.João Paulo Rechi Vita
It doesn't make sense to have a return value since we always set it to 0. Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix l2cap_sock_connect error return.João Paulo Rechi Vita
Return a proper error value if socket is already connected. Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Acked-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Improve ERTM local busy handlingGustavo F. Padovan
Now we also check if can push skb userspace just after receive a new skb instead of only wait the l2cap_busy_work wake up from time to time to check the local busy condition. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Add backlog queue to ERTM codeGustavo F. Padovan
backlog queue is the canonical mechanism to avoid race conditions due interrupts in bottom half context. After the socket lock is released the net core take care of push all skb in its backlog queue. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Remove the send_lock spinlock from ERTMGustavo F. Padovan
Using a lock to deal with the ERTM race condition - interruption with new data from the hci layer - is wrong. We should use the native skb backlog queue. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Don't accept ConfigReq if we aren't in the BT_CONFIG stateGustavo F. Padovan
If such event happens we shall reply with a Command Reject, because we are not expecting any configure request. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Disconnect early if mode is not supportedGustavo F. Padovan
When mode is mandatory we shall not send connect request and report this to the userspace as well. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Remove check for supported modeGustavo F. Padovan
Since now we have checks for the supported mode before on l2cap_info_rsp we can remove the check for it here. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Refuse ConfigRsp with different modeGustavo F. Padovan
If our mode is Basic Mode we have to refuse any ConfigRsp that proposes a different mode. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Actively send request for Basic ModeGustavo F. Padovan
The Profile Tuning Suite requires that we send a RFC containing the Basic Mode configuration when requesting Basic Mode. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Prefer Basic Mode on receipt of ConfigReqGustavo F. Padovan
If we choose to use Basic Mode then we have to refuse the received mode and propose Basic Mode again. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Disconnect the channel if we don't want the proposed modeGustavo F. Padovan
If the device is a STATE 2 then it should disconnect the channel if the remote device propose a mode different from its mandatory mode. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Change the way we set ERTM mode as mandatoryGustavo F. Padovan
If the socket type is SOCK_STREAM we set Enhanced Retransmisson Mode or Streaming Mode as mandatory. That means that we will close the channel if the other side doesn't support or request the the mandatory mode. Basic mode can't be set as mandatory. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Tweaks to l2cap_send_i_or_rr_or_rnr() flowGustavo F. Padovan
l2cap_send_sframe() already set the F-bit if we set L2CAP_CONN_SEND_FBIT and unset L2CAP_CONN_SEND_FBIT after send the F-bit. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Add debug output to ERTM codeGustavo F. Padovan
Use the dynamic debug to output info about ERTM protocol stuff. The following script can be used to enable debug for ERTM: DEBUGFS="/sys/kernel/debug/dynamic_debug/control" echo -n 'func l2cap_send_disconn_req +p' > $DEBUGFS echo -n 'func l2cap_monitor_timeout +p' > $DEBUGFS echo -n 'func l2cap_retrans_timeout +p' > $DEBUGFS echo -n 'func l2cap_busy_work +p' > $DEBUGFS echo -n 'func l2cap_push_rx_skb +p' > $DEBUGFS echo -n 'func l2cap_data_channel_iframe +p' > $DEBUGFS echo -n 'func l2cap_data_channel_rrframe +p' > $DEBUGFS echo -n 'func l2cap_data_channel_rejframe +p' > $DEBUGFS echo -n 'func l2cap_data_channel_srejframe +p' > $DEBUGFS echo -n 'func l2cap_data_channel_rnrframe +p' > $DEBUGFS Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix ERTM error reporting to the userspaceGustavo F. Padovan
If any error occurs during transfers we have to tell userspace that something wrong happened. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix missing retransmission action with RR(P=1)Gustavo F. Padovan
The Bluetooth SIG Profile Tuning Suite Software uses the CSA1 spec to run the L2CAP tests. The new 3.0 spec has a missing Retransmit-I-Frames action when the Remote side is Busy. We still start the retransmission timer if Remote is Busy and unacked frames > 0. We do everything we did before this change plus the Retransmission of I-frames. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Check packet FCS earlierGustavo F. Padovan
This way, if FCS is enabled and the packet is corrupted, we just drop it without read it len, which could be corrupted. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Check the tx_window size on setsockoptGustavo F. Padovan
We have to check if the proposed tx_window value is not greater that maximum value supported. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Fix handle of received P-bitGustavo F. Padovan
ERTM spec mandates that after receive a P-bit we shall send an F-bit in response. This patch fixes this for retransmitted packets, on retransmitting we were missing to check for a pending F-bit to be sent. Also we were missing some annotation to send a F-bit. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Update buffer_seq before retransmit framesGustavo F. Padovan
Updating buffer_seq first make us able to ack the last I-frame received. This is also a requirement of the Profile Tuning Suite software. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2010-07-21Bluetooth: Stop ack_timer if ERTM enters in Local Busy or SREJ_SENTGustavo F. Padovan
The ack_timer is implemation specific, disabling it in such situation avoids some potencial errors in the ERTM protocol. Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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