- 14 Mar, 2015 17 commits
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Jon Paul Maloy authored
Messages transferred by TIPC are assigned an "importance priority", -an integer value indicating how to treat the message when there is link or destination socket congestion. There is no separate header field for this value. Instead, the message user values have been chosen in ascending order according to perceived importance, so that the message user field can be used for this. This is not a good solution. First, we have many more users than the needed priority levels, so we end up with treating more priority levels than necessary. Second, the user field cannot always accurately reflect the priority of the message. E.g., a message fragment packet should really have the priority of the enveloped user data message, and not the priority of the MSG_FRAGMENTER user. Until now, we have been working around this problem in different ways, but it is now time to implement a consistent way of handling such priorities, although still within the constraint that we cannot allocate any more bits in the regular data message header for this. In this commit, we define a new priority level, TIPC_SYSTEM_IMPORTANCE, that will be the only one used apart from the four (lower) user data levels. All non-data messages map down to this priority. Furthermore, we take some free bits from the MSG_FRAGMENTER header and allocate them to store the priority of the enveloped message. We then adjust the functions msg_importance()/msg_set_importance() so that they read/set the correct header fields depending on user type. This small protocol change is fully compatible, because the code at the receiving end of a link currently reads the importance level only from user data messages, where there is no change. Reviewed-by:
Erik Hugne <erik.hugne@ericsson.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jon Paul Maloy authored
struct tipc_link contains one single queue for outgoing packets, where both transmitted and waiting packets are queued. This infrastructure is hard to maintain, because we need to keep a number of fields to keep track of which packets are sent or unsent, and the number of packets in each category. A lot of code becomes simpler if we split this queue into a transmission queue, where sent/unacknowledged packets are kept, and a backlog queue, where we keep the not yet sent packets. In this commit we do this separation. Reviewed-by:
Ying Xue <ying.xue@windriver.com> Signed-off-by:
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Jon Paul Maloy authored
The unicast packet header contains a broadcast acknowledge sequence number, that may need to be conveyed to the broadcast link for proper treatment. Currently, the function tipc_rcv(), which is on the most critical data path, calls the function tipc_bclink_acknowledge() to have this done. This call is made for each received packet, and results in the unconditional grabbing of the broadcast link spinlock. This is unnecessary, since we can see directly from tipc_rcv() if the acknowledged number differs from what has been previously acked from the node in question. In the vast majority of cases the numbers won't differ, and there is nothing to update. We now make the call to tipc_bclink_acknowledge() conditional to that the two ack values differ. Reviewed-by:
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Jon Paul Maloy authored
When we currently extract a bundled buffer from a message bundle in the function tipc_msg_extract(), we allocate a new buffer and explicitly copy the linear data area. This is unnecessary, since we can just clone the buffer and do skb_pull() on the clone to move the data pointer to the correct position. This is what we do in this commit. Reviewed-by:
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Jon Paul Maloy authored
Currently, TIPC linearizes all incoming buffers directly at reception before passing them upwards in the stack. This is clearly a waste of CPU resources, and must be avoided. In this commit, we eliminate this unnecessary linearization. We still ensure that at least the message header is linear, and that the buffer is linearized where this is still needed, i.e. when unbundling and when reversing messages. In addition, we ensure that fragmented messages are validated after reassembly before delivering them upwards in the stack. Reviewed-by:
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Jon Paul Maloy authored
The function link_buf_validate() is in reality re-entrant and context independent, and will in later commits be called from several locations. Therefore, we move it to msg.c, make it outline and rename the it to tipc_msg_validate(). We also redesign the function to make proper use of pskb_may_pull() Signed-off-by:
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Jon Paul Maloy authored
The TIPC protocol spec has defined a 13 bit capability bitmap in the neighbor discovery header, as a means to maintain compatibility between different code and protocol generations. Until now this field has been unused. We now introduce the basic framework for exchanging capabilities between nodes at first contact. After exchange, a peer node's capabilities are stored as a 16 bit bitmap in struct tipc_node. Reviewed-by:
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David S. Miller authored
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg says: ==================== Here's another set of Bluetooth & ieee802154 patches intended for 4.1: - Added support for QCA ROME chipset family in the btusb driver - at86rf230 driver fixes & cleanups - ieee802154 cleanups - Refactoring of Bluetooth mgmt API to allow new users - New setting for static Bluetooth address exposed to user space - Refactoring of hci_dev flags to remove limit of 32 - Remove unnecessary fast-connectable setting usage restrictions - Fix behavior to be consistent when trying to pair already paired device - Service discovery corner-case fixes Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by:
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Julia Lawall authored
The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ type T; identifier f; @@ static T f (...) { ... } @@ identifier r.f; declarer name EXPORT_SYMBOL; @@ -EXPORT_SYMBOL(f); // </smpl> Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Acked-by:
Alexander Aring <alex.aring@gmail.com> Signed-off-by:
Marcel Holtmann <marcel@holtmann.org>
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Alexander Aring authored
These registers are also changed by transceiver and should be volatile for right accessing via regmap debugfs. Signed-off-by:
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Alexander Aring authored
This patch adds a handling for calibration if we are 5 minutes in PLL state. I first tried to implement the calibration functionality in TX_ON state via register values CF_START and DCU_START, but this occurs a one second delay at each calibration time. An another solution to start a calibration is to switch from TRX_OFF state into TX_ON, then a calibration is done automatically by transceiver. This method will be used in this patch, after each transmit of a frame we check with jiffies if the PLL is set 5 minutes without doing a TRX_OFF->(TX_ON || RX_AACK_ON) or channel switch. The worst case would be a transceiver in receiving mode only, but this is under normal operation very unlikely. Signed-off-by:
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Alexander Aring authored
This patch replace the state change timing relevant sleeps with hrtimers. Currently the sleeps are done in the complete handler of spi_async. The relation of doing the state change timing sleep with a timer will get the sleep functionality out of spi_async complete handler context. Signed-off-by:
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Alexander Aring authored
This patch initialize xtal_trim value to zero. The xtal_trim property is an optional device tree value. Currently if no xtal_trim property is given the xtal_trim value can be contain random data, because it's a stack variable. This patch init the xtal_trim value to zero which is also the default value after reset for at86rf230 transceivers. Signed-off-by:
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Alexander Aring authored
This patch fix the max sifs size correction when the IEEE802154_HW_TX_OMIT_CKSUM flag is set. With this flag the sk_buff doesn't contain the CRC, because the transceiver will add the CRC while transmit. Also add some defines for the max sifs frame size value and frame check sequence according to 802.15.4 standard. Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Alexander Aring authored
It's only necessary to offer the name and index, others value are available over netlink. Signed-off-by:
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Alexander Aring authored
Currently the wpan_phy under /sys/class/ieee802154/ is named as "wpan-phy#", this patch will change the name to phy. This will introduce the same naming convention like wireless. Note: wpan-tools users will not type "wpan-phy#" anymore, just a simple "phy#" is enough. Signed-off-by: -
Alexander Aring authored
Currently there exists two interface types with ARPHRD_IEEE802154. These are the 802.15.4 interfaces and 802.15.4 6LoWPAN interfaces. This is more a bug because some userspace applications checks on this value like wireshark. This occurs that wireshark will always try to parse a lowpan interface as 802.15.4 frames. With ARPHRD_6LOWPAN wireshark will parse it as IPv6 frames which is correct. Much applications checks on this value to readout the EUI64 mac address which should be the same for ARPHRD_6LOWPAN. BTLE 6LoWPAN and ieee802154 6LoWPAN will share now the same ARPHRD. Signed-off-by:
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- 13 Mar, 2015 23 commits
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David S. Miller authored
Florian Fainelli says: ==================== net: bcmgenet: xmit_more support This patch series adds xmit_more support to the GENET driver by allowing the deferal of the producer index write to the TDMA engine. Changes in v2: - move the netif_tx_stop_queue check *before* updating the producer index ==================== Signed-off-by: -
Florian Fainelli authored
Delay the update of the TDMA producer index unless this is the last SKB in a batch, or the queue is already stopped. Move the check for whether the queue should be stopped before the xmit_more check to avoid locking the transmit queue in case there was a SKB submitted which has xmit_more set. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Florian Fainelli authored
There is no need to have both bcmgenet_xmit_single() and bcmgenet_xmit_frag() perform a free_bds decrement and a prod_index increment by one. In case one of these functions fails to map a SKB or fragment for transmit, we will return and exit bcmgenet_xmit() with an error. We can therefore safely use our local copy of nr_frags to know by how much we should decrement the number of free buffers available, and by how much the producer count must be incremented and do this in the tail of bcmgenet_xmit(). Signed-off-by:
Petri Gynther <pgynther@google.com> Signed-off-by:
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Petri Gynther authored
Currently, bcmgenet_desc_rx() calls bcmgenet_rx_refill() at the end of Rx packet processing loop, after the current Rx packet has already been passed to napi_gro_receive(). However, bcmgenet_rx_refill() might fail to allocate a new Rx skb, thus leaving a hole on the Rx queue where no valid Rx buffer exists. To eliminate this situation: 1. Rewrite bcmgenet_rx_refill() to retain the current Rx skb on the Rx queue if a new replacement Rx skb can't be allocated and DMA-mapped. In this case, the data on the current Rx skb is effectively dropped. 2. Modify bcmgenet_desc_rx() to call bcmgenet_rx_refill() at the top of Rx packet processing loop, so that the new replacement Rx skb is already in place before the current Rx skb is processed. Signed-off-by:
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Marcel Holtmann authored
With the extension of hdev->dev_flags utilizing a bitmap now, the space is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags to save space on 64-bit architectures. On 32-bit architectures no size reduction happens. Signed-off-by:
Johan Hedberg <johan.hedberg@intel.com>
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Marcel Holtmann authored
The hdev->dev_flags field has outgrown itself on 32-bit systems. So instead of hacking around it, switch to using DECLARE_BITMAP. Signed-off-by:
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Daniel Drake authored
Multiple codepaths duplicate some simple code to read and sanity-check local version information. Before I add a couple more such codepaths, add a helper to reduce duplication. Signed-off-by:
Daniel Drake <drake@endlessm.com> Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding test_and_set_bit on hdev->dev_flags all the time, use hci_dev_test_and_set_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding test_and_clear_bit on hdev->dev_flags all the time, use hci_dev_test_and_clear_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding test_and_change_bit on hdev->dev_flags all the time, use hci_dev_test_and_change_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding change_bit on hdev->dev_flags all the time, use hci_dev_change_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding clear_bit on hdev->dev_flags all the time, use hci_dev_clear_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding set_bit on hdev->dev_flags all the time, use hci_dev_set_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
Instead of manually coding test_bit on hdev->dev_flags all the time, use hci_dev_test_flag helper macro. Signed-off-by:
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Marcel Holtmann authored
The patch adds a second advertising setting that allows switching of the controller into connectable mode independent of the global connectable setting. Signed-off-by:
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David S. Miller authored
Eric W. Biederman says: ==================== tcp_metrics: Network namespace bloat reduction v3 This is a small pile of patches that convert tcp_metrics from using a hash table per network namespace to using a single hash table for all network namespaces. This is broken up into several patches so that each small step along the way could be carefully scrutinized as I wrote it, and equally so that each small step can be reviewed. There are several cleanups included in this series. The addition of panic calls during boot where we can not handle failure, and not trying simplifies the code. The removal of the return code from tcp_metrics_flush_all. The motivation for this change is that the tcp_metrics hash table at 128KiB is one of the largest components of a freshly allocated network namespace. I am resending the the previous version I sent has suffered bitrot, so I have respun the patches so that they apply. I believe I have addressed all of the review concerns except optimal behavior on little machines with 32-byte cache lines, which is beyond me as even the current code has bad behavior in that case. ==================== Signed-off-by: -
Eric W. Biederman authored
Now that all of the operations are safe on a single hash table accross network namespaces, allocate a single global hash table and update the code to use it. Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Eric W. Biederman authored
Rewrite tcp_metrics_flush_all so that it can cope with entries from different network namespaces on it's hash chain. This is based on the logic in tcp_metrics_nl_cmd_del for deleting a selection of entries from a tcp metrics hash chain. Signed-off-by:
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Eric W. Biederman authored
tcp_metrics_flush_all always returns 0. Remove the unnecessary return code. Signed-off-by:
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Eric W. Biederman authored
In preparation for using one tcp metrics hash table for all network namespaces add a field tcpm_net to struct tcp_metrics_block, and verify that field on all hash table lookups. Make the field tcpm_net of type possible_net_t so it takes no space when network namespaces are disabled. Further add a function tm_net to read that field so we can be efficient when network namespaces are disabled and concise the rest of the time. Signed-off-by:
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Eric W. Biederman authored
In preparation for using one hash table for all network namespaces mix the network namespace into the hash value. Signed-off-by:
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Eric W. Biederman authored
There is not a practical way to cleanup during boot so just panic if there is a problem initializing tcp_metrics. That will at least give us a clear place to start debugging if something does go wrong. Signed-off-by:
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Simon Horman authored
In the case of AF_INET s_addr was set to INADDR_ANY (0) which which both symmetric with the AF_INET6 case, where s_addr is not set, and unnecessary as udp_conf is zeroed out earlier in the same function. I suspect this change does not have any run-time effect due to compiler optimisations. But it does make the code a little easier on the/my eyes. Cc: Tom Herbert <therbert@google.com> Signed-off-by:
Simon Horman <simon.horman@netronome.com> Signed-off-by:
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