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Yunsheng Lin says:
====================
introduce page_pool_alloc() related API
In [1] & [2] & [3], there are usecases for veth and virtio_net
to use frag support in page pool to reduce memory usage, and it
may request different frag size depending on the head/tail
room space for xdp_frame/shinfo and mtu/packet size. When the
requested frag size is large enough that a single page can not
be split into more than one frag, using frag support only have
performance penalty because of the extra frag count handling
for frag support.
So this patchset provides a page pool API for the driver to
allocate memory with least memory utilization and performance
penalty when it doesn't know the size of memory it need
beforehand.
1. https://patchwork.kernel.org/project/netdevbpf/patch/d3ae6bd3537fbce379382ac6a42f67e22f27ece2.1683896626.git.lorenzo@kernel.org/
2. https://patchwork.kernel.org/project/netdevbpf/patch/20230526054621.18371-3-liangchen.linux@gmail.com/
3. https://github.com/alobakin/linux/tree/iavf-pp-frag
====================
Link: https://lore.kernel.org/r/20231020095952.11055-1-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Use page_pool_alloc() API to allocate memory with least
memory utilization and performance penalty.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20231020095952.11055-6-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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As more drivers begin to use the fragment API, update the
document about how to decide which API to use for the
driver author.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
CC: Dima Tisnek <dimaqq@gmail.com>
Link: https://lore.kernel.org/r/20231020095952.11055-5-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently page pool supports the below use cases:
use case 1: allocate page without page splitting using
page_pool_alloc_pages() API if the driver knows
that the memory it need is always bigger than
half of the page allocated from page pool.
use case 2: allocate page frag with page splitting using
page_pool_alloc_frag() API if the driver knows
that the memory it need is always smaller than
or equal to the half of the page allocated from
page pool.
There is emerging use case [1] & [2] that is a mix of the
above two case: the driver doesn't know the size of memory it
need beforehand, so the driver may use something like below to
allocate memory with least memory utilization and performance
penalty:
if (size << 1 > max_size)
page = page_pool_alloc_pages();
else
page = page_pool_alloc_frag();
To avoid the driver doing something like above, add the
page_pool_alloc() API to support the above use case, and update
the true size of memory that is acctually allocated by updating
'*size' back to the driver in order to avoid exacerbating
truesize underestimate problem.
Rename page_pool_free() which is used in the destroy process to
__page_pool_destroy() to avoid confusion with the newly added
API.
1. https://lore.kernel.org/all/d3ae6bd3537fbce379382ac6a42f67e22f27ece2.1683896626.git.lorenzo@kernel.org/
2. https://lore.kernel.org/all/20230526054621.18371-3-liangchen.linux@gmail.com/
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20231020095952.11055-4-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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PP_FLAG_PAGE_FRAG is not really needed after pp_frag_count
handling is unified and page_pool_alloc_frag() is supported
in 32-bit arch with 64-bit DMA, so remove it.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20231020095952.11055-3-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently when page_pool_create() is called with
PP_FLAG_PAGE_FRAG flag, page_pool_alloc_pages() is only
allowed to be called under the below constraints:
1. page_pool_fragment_page() need to be called to setup
page->pp_frag_count immediately.
2. page_pool_defrag_page() often need to be called to drain
the page->pp_frag_count when there is no more user will
be holding on to that page.
Those constraints exist in order to support a page to be
split into multi fragments.
And those constraints have some overhead because of the
cache line dirtying/bouncing and atomic update.
Those constraints are unavoidable for case when we need a
page to be split into more than one fragment, but there is
also case that we want to avoid the above constraints and
their overhead when a page can't be split as it can only
hold a fragment as requested by user, depending on different
use cases:
use case 1: allocate page without page splitting.
use case 2: allocate page with page splitting.
use case 3: allocate page with or without page splitting
depending on the fragment size.
Currently page pool only provide page_pool_alloc_pages() and
page_pool_alloc_frag() API to enable the 1 & 2 separately,
so we can not use a combination of 1 & 2 to enable 3, it is
not possible yet because of the per page_pool flag
PP_FLAG_PAGE_FRAG.
So in order to allow allocating unsplit page without the
overhead of split page while still allow allocating split
page we need to remove the per page_pool flag in
page_pool_is_last_frag(), as best as I can think of, it seems
there are two methods as below:
1. Add per page flag/bit to indicate a page is split or
not, which means we might need to update that flag/bit
everytime the page is recycled, dirtying the cache line
of 'struct page' for use case 1.
2. Unify the page->pp_frag_count handling for both split and
unsplit page by assuming all pages in the page pool is split
into a big fragment initially.
As page pool already supports use case 1 without dirtying the
cache line of 'struct page' whenever a page is recyclable, we
need to support the above use case 3 with minimal overhead,
especially not adding any noticeable overhead for use case 1,
and we are already doing an optimization by not updating
pp_frag_count in page_pool_defrag_page() for the last fragment
user, this patch chooses to unify the pp_frag_count handling
to support the above use case 3.
There is no noticeable performance degradation and some
justification for unifying the frag_count handling with this
patch applied using a micro-benchmark testing in [1].
1. https://lore.kernel.org/all/bf2591f8-7b3c-4480-bb2c-31dc9da1d6ac@huawei.com/
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
CC: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Alexander Duyck <alexander.duyck@gmail.com>
CC: Liang Chen <liangchen.linux@gmail.com>
CC: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20231020095952.11055-2-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Luiz Augusto von Dentz says:
====================
bluetooth-next pull request for net-next:
- Add 0bda:b85b for Fn-Link RTL8852BE
- ISO: Many fixes for broadcast support
- Mark bcm4378/bcm4387 as BROKEN_LE_CODED
- Add support ITTIM PE50-M75C
- Add RTW8852BE device 13d3:3570
- Add support for QCA2066
- Add support for Intel Misty Peak - 8087:0038
* tag 'for-net-next-2023-10-23' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next:
Bluetooth: hci_sync: Fix Opcode prints in bt_dev_dbg/err
Bluetooth: Fix double free in hci_conn_cleanup
Bluetooth: btmtksdio: enable bluetooth wakeup in system suspend
Bluetooth: btusb: Add 0bda:b85b for Fn-Link RTL8852BE
Bluetooth: hci_bcm4377: Mark bcm4378/bcm4387 as BROKEN_LE_CODED
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID
Bluetooth: Make handle of hci_conn be unique
Bluetooth: btusb: Add date->evt_skb is NULL check
Bluetooth: ISO: Fix bcast listener cleanup
Bluetooth: msft: __hci_cmd_sync() doesn't return NULL
Bluetooth: ISO: Match QoS adv handle with BIG handle
Bluetooth: ISO: Allow binding a bcast listener to 0 bises
Bluetooth: btusb: Add RTW8852BE device 13d3:3570 to device tables
Bluetooth: qca: add support for QCA2066
Bluetooth: ISO: Set CIS bit only for devices with CIS support
Bluetooth: Add support for Intel Misty Peak - 8087:0038
Bluetooth: Add support ITTIM PE50-M75C
Bluetooth: ISO: Pass BIG encryption info through QoS
Bluetooth: ISO: Fix BIS cleanup
====================
Link: https://lore.kernel.org/r/20231023182119.3629194-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Jiri Pirko says:
====================
devlink: finish conversion to generated split_ops
This patchset converts the remaining genetlink commands to generated
split_ops and removes the existing small_ops arrays entirely
alongside with shared netlink attribute policy.
Patches #1-#6 are just small preparations and small fixes on multiple
places. Note that couple of patches contain the "Fixes"
tag but no need to put them into -net tree.
Patch #7 is a simple rename preparation
Patch #8 is the main one in this set and adds actual definitions of cmds
in to yaml file.
Patches #9-#10 finalize the change removing bits that are no longer in
use.
====================
Link: https://lore.kernel.org/r/20231021112711.660606-1-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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All commands are now covered by generated split_ops. Remove the
small_ops entirely alongside with unified devlink netlink policy array.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-11-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The prototypes are now generated, remove the old ones.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-10-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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split_ops
Currently, some of the commands are not described in devlink yaml file
and are manually filled in net/devlink/netlink.c in small_ops. To make
all part of split_ops, add definitions of the rest of the commands
alongside with needed attributes and enums.
Note that this focuses on the kernel side. The requests are fully
described in order to generate split_op alongside with policies.
Follow-up will describe the replies in order to make the userspace
helpers complete.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-9-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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All remaining doit and dumpit netlink callback functions are going to be
used by generated split ops. They expect certain name format. Rename the
callback to be aligned with generated names.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-8-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Since this enum is going to be used in generated userspace file, name it
properly.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-7-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Make dont-validate field more compact and push it into a single line.
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-6-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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devlink-get command does not contain reload-action attr in reply.
Remove it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-5-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Due to the check in RenderInfo class constructor, type_consistent
flag is set to False to avoid rendering the same response parsing
helper for do and dump ops. However, in case there is no do, the helper
needs to be rendered for dump op. So split check to achieve that.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-4-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Introduce support for attribute type bitfield32.
Note that since the generated code works with struct nla_bitfield32,
the generator adds netlink.h to the list of includes for userspace
headers in case any bitfield32 is present.
Note that this is added only to genetlink-legacy scheme as requested
by Jakub Kicinski.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-3-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently, split ops of doit and dumpit are merged into a single iter
item when they are subsequent. However, there is no guarantee that the
dumpit op is for the same cmd as doit op.
Fix this by checking if cmd is the same for both.
This problem does not occur in existing families.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231021112711.660606-2-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Jacob Keller says:
====================
Intel Wired LAN Driver Updates 2023-10-19 (idpf)
This series contains two fixes for the recently merged idpf driver.
Michal adds missing logic for programming the scheduling mode of completion
queues.
Pavan fixes a call trace caused by the mailbox work item not being canceled
properly if an error occurred during initialization.
====================
Link: https://lore.kernel.org/r/20231023202655.173369-1-jacob.e.keller@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In idpf_vc_core_init, the mailbox work is queued
on a mailbox workqueue but it is not cancelled on error.
This results in a call trace when idpf_mbx_task tries
to access the freed mailbox queue pointer. Fix it by
cancelling the mailbox work in the error path.
Fixes: 4930fbf419a7 ("idpf: add core init and interrupt request")
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231023202655.173369-3-jacob.e.keller@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The HW must be programmed differently for queue-based scheduling mode.
To program the completion queue context correctly, the control plane
must know the scheduling mode not only for the Tx queue, but also for
the completion queue.
Unfortunately, currently the driver sets the scheduling mode only for
the Tx queues.
Propagate the scheduling mode data for the completion queue as
well when sending the queue configuration messages.
Fixes: 1c325aac10a8 ("idpf: configure resources for TX queues")
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Alan Brady <alan.brady@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231023202655.173369-2-jacob.e.keller@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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If packets of a TCP flows take the fast path, we need to make sure
sk->sk_pacing_status is set to SK_PACING_FQ otherwise TCP might
fallback to internal pacing, which is not optimal.
Fixes: 076433bd78d7 ("net_sched: sch_fq: add fast path for mostly idle qdisc")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20231020201254.732527-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A last minute change went wrong.
We need to look for a packet in all 3 bands, not only two.
Fixes: 29f834aa326e ("net_sched: sch_fq: add 3 bands and WRR scheduling")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202310201422.a22b0999-oliver.sang@intel.com
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Dave Taht <dave.taht@gmail.com>
Cc: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20231020200053.675951-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Printed Opcodes may be missing leading zeros:
Bluetooth: hci0: Opcode 0x c03 failed: -110
Fix this by always printing leading zeros:
Bluetooth: hci0: Opcode 0x0c03 failed: -110
Fixes: d0b137062b2d ("Bluetooth: hci_sync: Rework init stages")
Fixes: 6a98e3836fa2 ("Bluetooth: Add helper for serialized HCI command execution")
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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syzbot reports a slab use-after-free in hci_conn_hash_flush [1].
After releasing an object using hci_conn_del_sysfs in the
hci_conn_cleanup function, releasing the same object again
using the hci_dev_put and hci_conn_put functions causes a double free.
Here's a simplified flow:
hci_conn_del_sysfs:
hci_dev_put
put_device
kobject_put
kref_put
kobject_release
kobject_cleanup
kfree_const
kfree(name)
hci_dev_put:
...
kfree(name)
hci_conn_put:
put_device
...
kfree(name)
This patch drop the hci_dev_put and hci_conn_put function
call in hci_conn_cleanup function, because the object is
freed in hci_conn_del_sysfs function.
This patch also fixes the refcounting in hci_conn_add_sysfs() and
hci_conn_del_sysfs() to take into account device_add() failures.
This fixes CVE-2023-28464.
Link: https://syzkaller.appspot.com/bug?id=1bb51491ca5df96a5f724899d1dbb87afda61419 [1]
Signed-off-by: ZhengHan Wang <wzhmmmmm@gmail.com>
Co-developed-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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The BTMTKSDIO_BT_WAKE_ENABLED flag is set for bluetooth interrupt
during system suspend and increases wakeup count for bluetooth event.
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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Add PID/VID 0bda:b85b for Realtek RTL8852BE USB bluetooth part.
The PID/VID was reported by the patch last year. [1]
Some SBCs like rockpi 5B A8 module contains the device.
And it`s founded in website. [2] [3]
Here is the device tables in /sys/kernel/debug/usb/devices .
T: Bus=07 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0bda ProdID=b85b Rev= 0.00
S: Manufacturer=Realtek
S: Product=Bluetooth Radio
S: SerialNumber=00e04c000001
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
Link: https://lore.kernel.org/all/20220420052402.19049-1-tangmeng@uniontech.com/ [1]
Link: https://forum.radxa.com/t/bluetooth-on-ubuntu/13051/4 [2]
Link: https://ubuntuforums.org/showthread.php?t=2489527 [3]
Cc: stable@vger.kernel.org
Signed-off-by: Meng Tang <tangmeng@uniontech.com>
Signed-off-by: Guan Wentao <guanwentao@uniontech.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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bcm4378 and bcm4387 claim to support LE Coded PHY but fail to pair
(reliably) with BLE devices if it is enabled.
On bcm4378 pairing usually succeeds after 2-3 tries. On bcm4387
pairing appears to be completely broken.
Cc: stable@vger.kernel.org # 6.4.y+
Link: https://discussion.fedoraproject.org/t/mx-master-3-bluetooth-mouse-doesnt-connect/87072/33
Link: https://github.com/AsahiLinux/linux/issues/177
Fixes: 288c90224eec ("Bluetooth: Enable all supported LE PHY by default")
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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Copy the content of a Periodic Advertisement Report to BASE only if
the service UUID is Basic Audio Announcement Service UUID.
Signed-off-by: Claudia Draghicescu <claudia.rosu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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The handle of new hci_conn is always HCI_CONN_HANDLE_MAX + 1 if
the handle of the first hci_conn entry in hci_dev->conn_hash->list
is not HCI_CONN_HANDLE_MAX + 1. Use ida to manage the allocation of
hci_conn->handle to make it be unique.
Fixes: 9f78191cc9f1 ("Bluetooth: hci_conn: Always allocate unique handles")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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fix crash because of null pointers
[ 6104.969662] BUG: kernel NULL pointer dereference, address: 00000000000000c8
[ 6104.969667] #PF: supervisor read access in kernel mode
[ 6104.969668] #PF: error_code(0x0000) - not-present page
[ 6104.969670] PGD 0 P4D 0
[ 6104.969673] Oops: 0000 [#1] SMP NOPTI
[ 6104.969684] RIP: 0010:btusb_mtk_hci_wmt_sync+0x144/0x220 [btusb]
[ 6104.969688] RSP: 0018:ffffb8d681533d48 EFLAGS: 00010246
[ 6104.969689] RAX: 0000000000000000 RBX: ffff8ad560bb2000 RCX: 0000000000000006
[ 6104.969691] RDX: 0000000000000000 RSI: ffffb8d681533d08 RDI: 0000000000000000
[ 6104.969692] RBP: ffffb8d681533d70 R08: 0000000000000001 R09: 0000000000000001
[ 6104.969694] R10: 0000000000000001 R11: 00000000fa83b2da R12: ffff8ad461d1d7c0
[ 6104.969695] R13: 0000000000000000 R14: ffff8ad459618c18 R15: ffffb8d681533d90
[ 6104.969697] FS: 00007f5a1cab9d40(0000) GS:ffff8ad578200000(0000) knlGS:00000
[ 6104.969699] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6104.969700] CR2: 00000000000000c8 CR3: 000000018620c001 CR4: 0000000000760ef0
[ 6104.969701] PKRU: 55555554
[ 6104.969702] Call Trace:
[ 6104.969708] btusb_mtk_shutdown+0x44/0x80 [btusb]
[ 6104.969732] hci_dev_do_close+0x470/0x5c0 [bluetooth]
[ 6104.969748] hci_rfkill_set_block+0x56/0xa0 [bluetooth]
[ 6104.969753] rfkill_set_block+0x92/0x160
[ 6104.969755] rfkill_fop_write+0x136/0x1e0
[ 6104.969759] __vfs_write+0x18/0x40
[ 6104.969761] vfs_write+0xdf/0x1c0
[ 6104.969763] ksys_write+0xb1/0xe0
[ 6104.969765] __x64_sys_write+0x1a/0x20
[ 6104.969769] do_syscall_64+0x51/0x180
[ 6104.969771] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 6104.969773] RIP: 0033:0x7f5a21f18fef
[ 6104.9] RSP: 002b:00007ffeefe39010 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[ 6104.969780] RAX: ffffffffffffffda RBX: 000055c10a7560a0 RCX: 00007f5a21f18fef
[ 6104.969781] RDX: 0000000000000008 RSI: 00007ffeefe39060 RDI: 0000000000000012
[ 6104.969782] RBP: 00007ffeefe39060 R08: 0000000000000000 R09: 0000000000000017
[ 6104.969784] R10: 00007ffeefe38d97 R11: 0000000000000293 R12: 0000000000000002
[ 6104.969785] R13: 00007ffeefe39220 R14: 00007ffeefe391a0 R15: 000055c10a72acf0
Signed-off-by: youwan Wang <wangyouwan@126.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This fixes the cleanup callback for slave bis and pa sync hcons.
Closing all bis hcons will trigger BIG Terminate Sync, while closing
all bises and the pa sync hcon will also trigger PA Terminate Sync.
Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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The __hci_cmd_sync() function doesn't return NULL. Checking for NULL
doesn't make the code safer, it just confuses people.
When a function returns both error pointers and NULL then generally the
NULL is a kind of success case. For example, maybe we look up an item
then errors mean we ran out of memory but NULL means the item is not
found. Or if we request a feature, then error pointers mean that there
was an error but NULL means that the feature has been deliberately
turned off.
In this code it's different. The NULL is handled as if there is a bug
in __hci_cmd_sync() where it accidentally returns NULL instead of a
proper error code. This was done consistently until commit 9e14606d8f38
("Bluetooth: msft: Extended monitor tracking by address filter") which
deleted the work around for the potential future bug and treated NULL as
success.
Predicting potential future bugs is complicated, but we should just fix
them instead of working around them. Instead of debating whether NULL
is failure or success, let's just say it's currently impossible and
delete the dead code.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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In case the user binds multiple sockets for the same BIG, the BIG
handle should be matched with the associated adv handle, if it has
already been allocated previously.
Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This makes it possible to bind a broadcast listener to a broadcaster
address without asking for any BIS indexes to sync with.
Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This device is used in TP-Link TX20E WiFi+Bluetooth adapter.
Relevant information in /sys/kernel/debug/usb/devices
about the Bluetooth device is listed as the below.
T: Bus=01 Lev=01 Prnt=01 Port=08 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=13d3 ProdID=3570 Rev= 0.00
S: Manufacturer=Realtek
S: Product=Bluetooth Radio
S: SerialNumber=00e04c000001
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
Signed-off-by: Masum Reza <masumrezarock100@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This patch adds support for QCA2066 firmware patch and NVM downloading.
as the RF performance of QCA2066 SOC chip from different foundries may
vary. Therefore we use different NVM to configure them based on board ID.
Changes in v2
- optimize the function qca_generate_hsp_nvm_name
- remove redundant debug code for function qca_read_fw_board_id
Signed-off-by: Tim Jiang <quic_tjiang@quicinc.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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Currently the CIS bit that can be set by the host is set for any device
that has CIS or BIS support. In reality, devices that support BIS may not
allow that bit to be set and so, the HCI bring up fails for them.
This commit fixes this by only setting the bit for CIS capable devices.
Signed-off-by: Vlad Pruteanu <vlad.pruteanu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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Devices from /sys/kernel/debug/usb/devices:
T: Bus=01 Lev=01 Prnt=01 Port=13 Cnt=02 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=8087 ProdID=0038 Rev= 0.00
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 64 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
I: If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 63 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 63 Ivl=1ms
Signed-off-by: Vijay Satija <vijay.satija@intel.com>
Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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-Device(35f5:7922) from /sys/kernel/debug/usb/devices
P: Vendor=35f5 ProdID=7922 Rev= 1.00
S: Manufacturer=MediaTek Inc.
S: Product=Wireless_Device
S: SerialNumber=000000000
C:* #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=100mA
A: FirstIf#= 0 IfCount= 3 Cls=e0(wlcon) Sub=01 Prot=01
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=125us
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
I: If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=83(I) Atr=01(Isoc) MxPS= 63 Ivl=1ms
E: Ad=03(O) Atr=01(Isoc) MxPS= 63 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E: Ad=8a(I) Atr=03(Int.) MxPS= 64 Ivl=125us
E: Ad=0a(O) Atr=03(Int.) MxPS= 64 Ivl=125us
I: If#= 2 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E: Ad=8a(I) Atr=03(Int.) MxPS= 512 Ivl=125us
E: Ad=0a(O) Atr=03(Int.) MxPS= 512 Ivl=125us
Signed-off-by: Jingyang Wang <wjy7717@126.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This enables a broadcast sink to be informed if the PA
it has synced with is associated with an encrypted BIG,
by retrieving the socket QoS and checking the encryption
field.
After PA sync has been successfully established and the
first BIGInfo advertising report is received, a new hcon
is added and notified to the ISO layer. The ISO layer
sets the encryption field of the socket and hcon QoS
according to the encryption parameter of the BIGInfo
advertising report event.
After that, the userspace is woken up, and the QoS of the
new PA sync socket can be read, to inspect the encryption
field and follow up accordingly.
Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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This fixes the master BIS cleanup procedure - as opposed to CIS cleanup,
no HCI disconnect command should be issued. A master BIS should only be
terminated by disabling periodic and extended advertising, and terminating
the BIG.
In case of a Broadcast Receiver, all BIS and PA connections can be
cleaned up by calling hci_conn_failed, since it contains all function
calls that are necessary for successful cleanup.
Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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Commit a243ecc323b9 ("net: mdio: xgene: Use device_get_match_data()")
dropped the unconditional use of xgene_mdio_of_match resulting in this
warning:
drivers/net/mdio/mdio-xgene.c:303:34: warning: unused variable 'xgene_mdio_of_match' [-Wunused-const-variable]
The fix is to drop of_match_ptr() which is not necessary because DT is
always used for this driver (well, it could in theory support ACPI only,
but CONFIG_OF is always enabled for arm64).
Fixes: a243ecc323b9 ("net: mdio: xgene: Use device_get_match_data()")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310170832.xnVXw1bb-lkp@intel.com/
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231019182345.833136-1-robh@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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checkpatch gets confused and treats __attribute__ as a function call.
It complains about white space before "(":
WARNING:SPACING: space prohibited between function name and open parenthesis '('
+ struct netdev_queue_get_rsp obj __attribute__ ((aligned (8)));
No spaces wins in the kernel:
$ git grep 'attribute__((.*aligned(' | wc -l
480
$ git grep 'attribute__ ((.*aligned (' | wc -l
110
$ git grep 'attribute__ ((.*aligned(' | wc -l
94
$ git grep 'attribute__((.*aligned (' | wc -l
63
So, whatever, change the codegen.
Note that checkpatch also thinks we should use __aligned(),
but this is user space code.
Link: https://lore.kernel.org/all/202310190900.9Dzgkbev-lkp@intel.com/
Acked-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Amritha Nambiar <amritha.nambiar@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20231020221827.3436697-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Prior to commit 1a074f7618e8 ("tls: also use init_prot_info in
tls_set_device_offload"), setting TLS_HW on TX didn't touch
prot->aad_size and prot->tail_size. They are set to 0 during context
allocation (tls_prot_info is embedded in tls_context, kzalloc'd by
tls_ctx_create).
When the RX key is configured, tls_set_sw_offload is called (for both
TLS_SW and TLS_HW). If the TX key is configured in TLS_HW mode after
the RX key has been installed, init_prot_info will now overwrite the
correct values of aad_size and tail_size, breaking SW decryption and
causing -EBADMSG errors to be returned to userspace.
Since TLS_HW doesn't use aad_size and tail_size at all (for TLS1.2,
tail_size is always 0, and aad_size is equal to TLS_HEADER_SIZE +
rec_seq_size), we can simply drop this hunk.
Fixes: 1a074f7618e8 ("tls: also use init_prot_info in tls_set_device_offload")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Tested-by: Ran Rozenstein <ranro@nvidia.com>
Link: https://lore.kernel.org/r/979d2f89a6a994d5bb49cae49a80be54150d094d.1697653889.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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'err' is useless after break, remove this to save space and
be more clear.
Signed-off-by: Su Hui <suhui@nfschina.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet says:
====================
tcp: add optional usec resolution to TCP TS
As discussed in various public places in 2016, Google adopted
usec resolution in RFC 7323 TS values, at Van Jacobson suggestion.
Goals were :
1) better observability of delays in networking stacks/fabrics.
2) better disambiguation of events based on TSval/ecr values.
3) building block for congestion control modules needing usec resolution.
Back then we implemented a schem based on private SYN options
to safely negotiate the feature.
For upstream submission, we chose to use a much simpler route
attribute because this feature is probably going to be used
in private networks.
ip route add 10/8 ... features tcp_usec_ts
References:
https://www.ietf.org/proceedings/97/slides/slides-97-tcpm-tcp-options-for-low-latency-00.pdf
https://datatracker.ietf.org/doc/draft-wang-tcpm-low-latency-opt/
First two patches are fixing old minor bugs and might be taken
by stable teams (thanks to appropriate Fixes: tags)
====================
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add the ability to report in tcp_info.tcpi_options if
a flow is using usec resolution in TCP TS val.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Back in 2015, Van Jacobson suggested to use usec resolution in TCP TS values.
This has been implemented in our private kernels.
Goals were :
1) better observability of delays in networking stacks.
2) better disambiguation of events based on TSval/ecr values.
3) building block for congestion control modules needing usec resolution.
Back then we implemented a schem based on private SYN options
to negotiate the feature.
For upstream submission, we chose to use a route attribute,
because this feature is probably going to be used in private
networks [1] [2].
ip route add 10/8 ... features tcp_usec_ts
Note that RFC 7323 recommends a
"timestamp clock frequency in the range 1 ms to 1 sec per tick.",
but also mentions
"the maximum acceptable clock frequency is one tick every 59 ns."
[1] Unfortunately RFC 7323 5.5 (Outdated Timestamps) suggests
to invalidate TS.Recent values after a flow was idle for more
than 24 days. This is the part making usec_ts a problem
for peers following this recommendation for long living
idle flows.
[2] Attempts to standardize usec ts went nowhere:
https://www.ietf.org/proceedings/97/slides/slides-97-tcpm-tcp-options-for-low-latency-00.pdf
https://datatracker.ietf.org/doc/draft-wang-tcpm-low-latency-opt/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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tcp_paws_check() uses TCP_PAWS_24DAYS constant to detect if TCP TS
values might have wrapped after a long idle period.
This mechanism is described in RFC 7323 5.5 (Outdated Timestamps)
TCP_PAWS_24DAYS value was based on the assumption of a clock
of 1 Khz.
As we want to adopt a 1 Mhz clock in the future, we reduce
this constant.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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