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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Commit Graph

1340 Commits

Author SHA1 Message Date
Johannes Berg
37c20b2eff wifi: cfg80211: fix cqm_config access race
Max Schulze reports crashes with brcmfmac. The reason seems
to be a race between userspace removing the CQM config and
the driver calling cfg80211_cqm_rssi_notify(), where if the
data is freed while cfg80211_cqm_rssi_notify() runs it will
crash since it assumes wdev->cqm_config is set. This can't
be fixed with a simple non-NULL check since there's nothing
we can do for locking easily, so use RCU instead to protect
the pointer, but that requires pulling the updates out into
an asynchronous worker so they can sleep and call back into
the driver.

Since we need to change the free anyway, also change it to
go back to the old settings if changing the settings fails.

Reported-and-tested-by: Max Schulze <max.schulze@online.de>
Closes: https://lore.kernel.org/r/ac96309a-8d8d-4435-36e6-6d152eb31876@online.de
Fixes: 4a4b816950 ("cfg80211: Accept multiple RSSI thresholds for CQM")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-09-11 16:43:35 +02:00
Aditya Kumar Singh
5112fa5027 wifi: cfg80211: validate AP phy operation before starting it
Many regulatories can have HE/EHT Operation as not permitted. In such
cases, AP should not be allowed to start if it is using a channel
having the no operation flag set. However, currently there is no such
check in place.

Fix this issue by validating such IEs sent during start AP against the
channel flags.

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20230905064857.1503-1-quic_adisi@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-09-11 12:18:55 +02:00
Johannes Berg
e8c1841278 wifi: cfg80211: annotate iftype_data pointer with sparse
There were are a number of cases in mac80211 and iwlwifi (at
least) that used the sband->iftype_data pointer directly,
instead of using the accessors to find the right array entry
to use.

Make sparse warn when such a thing is done.

To not have a lot of casts, add two helper functions/macros

 - ieee80211_set_sband_iftype_data()
 - for_each_sband_iftype_data()

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-09-11 11:27:23 +02:00
Johannes Berg
076fc8775d wifi: cfg80211: remove wdev mutex
Since we're now protecting everything with the wiphy mutex
(and were really using it for almost everything before),
there's no longer any real reason to have a separate wdev
mutex. It may feel better, but really has no value.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-09-11 11:27:23 +02:00
Johannes Berg
7483a2147a wifi: cfg80211: check RTNL when iterating devices
Add a new "for_each_rdev()" macro and check that we
hold the RTNL when calling it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-09-11 11:27:19 +02:00
Lin Ma
218d690c49 wifi: nl80211/cfg80211: add forgotten nla_policy for BSS color attribute
The previous commit dd3e4fc75b ("nl80211/cfg80211: add BSS color to
NDP ranging parameters") adds a parameter for NDP ranging by introducing
a new attribute type named NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR.

However, the author forgot to also describe the nla_policy at
nl80211_pmsr_ftm_req_attr_policy (net/wireless/nl80211.c). Just
complement it to avoid malformed attribute that causes out-of-attribute
access.

Fixes: dd3e4fc75b ("nl80211/cfg80211: add BSS color to NDP ranging parameters")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230809033151.768910-1-linma@zju.edu.cn
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-08-22 21:40:40 +02:00
Kees Cook
7b6d708703 wifi: cfg80211: Annotate struct cfg80211_rnr_elems with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct cfg80211_rnr_elems.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20230817211531.4193219-5-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-08-22 13:18:16 +02:00
Kees Cook
c14679d700 wifi: cfg80211: Annotate struct cfg80211_mbssid_elems with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct cfg80211_mbssid_elems.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20230817211531.4193219-3-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-08-22 13:18:16 +02:00
Kees Cook
93ca82447c wifi: cfg80211: Annotate struct cfg80211_acl_data with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct cfg80211_acl_data.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20230817211531.4193219-1-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-08-22 13:18:15 +02:00
Keith Yeo
6311071a05 wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems()
nl80211_parse_mbssid_elems() uses a u8 variable num_elems to count the
number of MBSSID elements in the nested netlink attribute attrs, which can
lead to an integer overflow if a user of the nl80211 interface specifies
256 or more elements in the corresponding attribute in userspace. The
integer overflow can lead to a heap buffer overflow as num_elems determines
the size of the trailing array in elems, and this array is thereafter
written to for each element in attrs.

Note that this vulnerability only affects devices with the
wiphy->mbssid_max_interfaces member set for the wireless physical device
struct in the device driver, and can only be triggered by a process with
CAP_NET_ADMIN capabilities.

Fix this by checking for a maximum of 255 elements in attrs.

Cc: stable@vger.kernel.org
Fixes: dc1e3cb8da ("nl80211: MBSSID and EMA support in AP mode")
Signed-off-by: Keith Yeo <keithyjy@gmail.com>
Link: https://lore.kernel.org/r/20230731034719.77206-1-keithyjy@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-08-09 14:43:35 +02:00
Veerendranath Jakkam
065563b20a wifi: cfg80211/nl80211: Add support to indicate STA MLD setup links removal
STA MLD setup links may get removed if AP MLD remove the corresponding
affiliated APs with Multi-Link reconfiguration as described in
P802.11be_D3.0, section 35.3.6.2.2 Removing affiliated APs. Currently,
there is no support to notify such operation to cfg80211 and userspace.

Add support for the drivers to indicate STA MLD setup links removal to
cfg80211 and notify the same to userspace. Upon receiving such
indication from the driver, clear the MLO links information of the
removed links in the WDEV.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230317142153.237900-1-quic_vjakkam@quicinc.com
[rename function and attribute, fix kernel-doc]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-19 12:08:40 +02:00
Mukesh Sisodiya
c6112046b1 wifi: cfg80211: make TDLS management link-aware
For multi-link operation(MLO) TDLS management
frames need to be transmitted on a specific link.
The TDLS setup request will add BSSID along with
peer address and userspace will pass the link-id
based on BSSID value to the driver(or mac80211).

Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230616094948.cb3d87c22812.Ia3d15ac4a9a182145bf2d418bcb3ddf4539cd0a7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-19 12:05:27 +02:00
Ilan Peer
6cf963edbb wifi: cfg80211: Support association to AP MLD with disabled links
An AP part of an AP MLD might be temporarily disabled, and might be
enabled later. Such a link should be included in the association
exchange, but should not be used until enabled.

Extend the NL80211_CMD_ASSOCIATE to also indicate disabled links.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230608163202.c4c61ee4c4a5.I784ef4a0d619fc9120514b5615458fbef3b3684a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-14 12:21:17 +02:00
Gilad Itzkovitch
2ad66fcb2f wifi: cfg80211: S1G rate information and calculations
Increase the size of S1G rate_info flags to support S1G and add
flags for new S1G MCS and the supported bandwidths. Also, include
S1G rate information to netlink STA rate message. Lastly, add
rate calculation function for S1G MCS.

Signed-off-by: Gilad Itzkovitch <gilad.itzkovitch@morsemicro.com>
Link: https://lore.kernel.org/r/20230518000723.991912-1-gilad.itzkovitch@morsemicro.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-14 11:57:26 +02:00
Johannes Berg
c88d717822 wifi: cfg80211: move sched scan stop to wiphy work
This work can now trivially be converted, it behaves
identical either way.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-07 19:53:31 +02:00
Johannes Berg
4d45145ba6 wifi: cfg80211: hold wiphy lock when sending wiphy
Sending the wiphy out might cause calls to the driver,
notably get_txq_stats() and get_antenna(). These aren't
very important, since the normally have their own locks
and/or just send out static data, but if the contract
should be that the wiphy lock is always held, these are
also affected. Fix that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-07 19:53:13 +02:00
Johannes Berg
727073ca5e wifi: cfg80211: reject bad AP MLD address
When trying to authenticate, if the AP MLD address isn't
a valid address, mac80211 can throw a warning. Avoid that
by rejecting such addresses.

Fixes: d648c23024 ("wifi: nl80211: support MLO in auth/assoc")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230604120651.89188912bd1d.I8dbc6c8ee0cb766138803eec59508ef4ce477709@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-06 10:05:17 +02:00
Jakub Kicinski
ce7928f7cf Major stack changes:
* TC offload support for drivers below mac80211
  * reduced neighbor report (RNR) handling for AP mode
  * mac80211 mesh fast-xmit and fast-rx support
  * support for another mesh A-MSDU format
    (seems nobody got the spec right)
 
 Major driver changes:
 
 Kalle moved the drivers that were just plain C files
 in drivers/net/wireless/ to legacy/ and virtual/ dirs.
 
 hwsim
  * multi-BSSID support
  * some FTM support
 
 ath11k
  * MU-MIMO parameters support
  * ack signal support for management packets
 
 rtl8xxxu
  * support for RTL8710BU aka RTL8188GU chips
 
 rtw89
  * support for various newer firmware APIs
 
 ath10k
  * enabled threaded NAPI on WCN3990
 
 iwlwifi
  * lots of work for multi-link/EHT (wifi7)
  * hardware timestamping support for some devices/firwmares
  * TX beacon protection on newer hardware
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Merge tag 'wireless-next-2023-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Johannes Berg says:

====================
Major stack changes:

 * TC offload support for drivers below mac80211
 * reduced neighbor report (RNR) handling for AP mode
 * mac80211 mesh fast-xmit and fast-rx support
 * support for another mesh A-MSDU format
   (seems nobody got the spec right)

Major driver changes:

Kalle moved the drivers that were just plain C files
in drivers/net/wireless/ to legacy/ and virtual/ dirs.

hwsim
 * multi-BSSID support
 * some FTM support

ath11k
 * MU-MIMO parameters support
 * ack signal support for management packets

rtl8xxxu
 * support for RTL8710BU aka RTL8188GU chips

rtw89
 * support for various newer firmware APIs

ath10k
 * enabled threaded NAPI on WCN3990

iwlwifi
 * lots of work for multi-link/EHT (wifi7)
 * hardware timestamping support for some devices/firwmares
 * TX beacon protection on newer hardware

* tag 'wireless-next-2023-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (181 commits)
  wifi: clean up erroneously introduced file
  wifi: iwlwifi: mvm: correctly use link in iwl_mvm_sta_del()
  wifi: iwlwifi: separate AP link management queues
  wifi: iwlwifi: mvm: free probe_resp_data later
  wifi: iwlwifi: bump FW API to 75 for AX devices
  wifi: iwlwifi: mvm: move max_agg_bufsize into host TLC lq_sta
  wifi: iwlwifi: mvm: send full STA during HW restart
  wifi: iwlwifi: mvm: rework active links counting
  wifi: iwlwifi: mvm: update mac config when assigning chanctx
  wifi: iwlwifi: mvm: use the correct link queue
  wifi: iwlwifi: mvm: clean up mac_id vs. link_id in MLD sta
  wifi: iwlwifi: mvm: fix station link data leak
  wifi: iwlwifi: mvm: initialize max_rc_amsdu_len per-link
  wifi: iwlwifi: mvm: use appropriate link for rate selection
  wifi: iwlwifi: mvm: use the new lockdep-checking macros
  wifi: iwlwifi: mvm: remove chanctx WARN_ON
  wifi: iwlwifi: mvm: avoid sending MAC context for idle
  wifi: iwlwifi: mvm: remove only link-specific AP keys
  wifi: iwlwifi: mvm: skip inactive links
  wifi: iwlwifi: mvm: adjust iwl_mvm_scan_respect_p2p_go_iter() for MLO
  ...
====================

Link: https://lore.kernel.org/r/20230330205612.921134-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-03-30 23:52:20 -07:00
Kieran Frewen
9a8aac92eb wifi: nl80211: support advertising S1G capabilities
Include S1G capabilities in netlink band info messages.

Signed-off-by: Kieran Frewen <kieran.frewen@morsemicro.com>
Co-developed-by: Gilad Itzkovitch <gilad.itzkovitch@morsemicro.com>
Signed-off-by: Gilad Itzkovitch <gilad.itzkovitch@morsemicro.com>
Link: https://lore.kernel.org/r/20230223212917.4010246-1-gilad.itzkovitch@virscient.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-30 12:02:59 +02:00
Jaewan Kim
5097f84437 wifi: nl80211: make nl80211_send_chandef non-static
Expose nl80211_send_chandef functionality for mac80211_hwsim or vendor
netlink can use it where needed.

Signed-off-by: Jaewan Kim <jaewan@google.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Link: https://lore.kernel.org/r/20230322131637.2633968-3-jaewan@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-24 11:45:51 +01:00
Aloka Dixit
dbbb27e183 cfg80211: support RNR for EMA AP
As per IEEE Std 802.11ax-2021, 11.1.3.8.3 Discovery of a nontransmitted
BSSID profile, an EMA AP that transmits a Beacon frame carrying a partial
list of nontransmitted BSSID profiles should include in the frame
a Reduced Neighbor Report element carrying information for at least the
nontransmitted BSSIDs that are not present in the Multiple BSSID element
carried in that frame.
Add new nested attribute NL80211_ATTR_EMA_RNR_ELEMS to support the above.
Number of RNR elements must be more than or equal to the number of
MBSSID elements. This attribute can be used only when EMA is enabled.
Userspace is responsible for splitting the RNR into multiple elements such
that each element excludes the non-transmitting profiles already included
in the MBSSID element (%NL80211_ATTR_MBSSID_ELEMS) at the same index.
Each EMA beacon will be generated by adding MBSSID and RNR elements
at the same index. If the userspace provides more RNR elements than the
number of MBSSID elements then these will be added in every EMA beacon.

Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Link: https://lore.kernel.org/r/20230323113801.6903-2-quic_alokad@quicinc.com
[Johannes: validate elements]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-24 11:12:48 +01:00
Jakub Kicinski
1118aa4c70 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
net/wireless/nl80211.c
  b27f07c50a ("wifi: nl80211: fix puncturing bitmap policy")
  cbbaf2bb82 ("wifi: nl80211: add a command to enable/disable HW timestamping")
https://lore.kernel.org/all/20230314105421.3608efae@canb.auug.org.au

tools/testing/selftests/net/Makefile
  62199e3f16 ("selftests: net: Add VXLAN MDB test")
  13715acf8a ("selftest: Add test for bind() conflicts.")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-03-17 16:29:25 -07:00
Johannes Berg
96c0695083 wifi: cfg80211: fix MLO connection ownership
When disconnecting from an MLO connection we need the AP
MLD address, not an arbitrary BSSID. Fix the code to do
that.

Fixes: 9ecff10e82 ("wifi: nl80211: refactor BSS lookup in nl80211_associate()")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.4c1b3b18980e.I008f070c7f3b8e8bde9278101ef9e40706a82902@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-10 11:47:25 +01:00
Johannes Berg
b27f07c50a wifi: nl80211: fix puncturing bitmap policy
This was meant to be a u32, and while applying the patch
I tried to use policy validation for it. However, not only
did I copy/paste it to u8 instead of u32, but also used
the policy range erroneously. Fix both of these issues.

Fixes: d7c1a9a0ed ("wifi: nl80211: validate and configure puncturing bitmap")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-10 11:46:45 +01:00
Johannes Berg
f624bb6fad wifi: nl80211: fix NULL-ptr deref in offchan check
If, e.g. in AP mode, the link was already created by userspace
but not activated yet, it has a chandef but the chandef isn't
valid and has no channel. Check for this and ignore this link.

Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.71bd4803fbb9.Iee39c0f6c2d3a59a8227674dc55d52e38b1090cf@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-10 11:46:22 +01:00
Jacob Keller
14e05beb10 wifi: nl80211: convert cfg80211_scan_request allocation to *_size macros
The cfg80211_scan_request structure is followed by a flexible array member
as well as several other arrays that are then stored into pointers in the
structure. These are allocated currently using a simple sequence of
multiplications.

Replace the calculations with struct_size(), size_add(), and array_size()
helper macros. These macros saturate the calculation at SIZE_MAX rather
than overflowing.

Note that we can't use flex_array_size() instead of array_size() because
the fields are not arrays, but simple pointers.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20230228162827.3876606-3-jacob.e.keller@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-07 17:13:38 +01:00
Johannes Berg
4c532321bf wifi: cfg80211/mac80211: report link ID on control port RX
For control port RX, report the link ID for MLO.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.fe06dfc3791b.Iddcab94789cafe336417be406072ce8a6312fc2d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-07 10:55:06 +01:00
Avraham Stern
cbbaf2bb82 wifi: nl80211: add a command to enable/disable HW timestamping
Add a command to enable and disable HW timestamping of TM and FTM
frames. HW timestamping can be enabled for a specific mac address
or for all addresses.

The low level driver will indicate how many peers HW timestamping
can be enabled concurrently, and this information will be passed
to userspace.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.05678d7b1c17.Iccc08869ea8156f1c71a3111a47f86dd56234bd0@changeid
[switch to needing netdev UP, minor edits]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-07 10:52:00 +01:00
Lorenzo Bianconi
935ef47b16 wifi: cfg80211: get rid of gfp in cfg80211_bss_color_notify
Since cfg80211_bss_color_notify() is now always run in non-atomic
context, get rid of gfp_t flags in the routine signature and always use
GFP_KERNEL for netlink message allocation.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/c687724e7b53556f7a2d9cbe3d11cdcf065cb687.1675255390.git.lorenzo@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:35:02 +01:00
Vinay Gannevaram
9b89495e47 wifi: nl80211: Allow authentication frames and set keys on NAN interface
Wi-Fi Aware R4 specification defines NAN Pairing which uses PASN handshake
to authenticate the peer and generate keys. Hence allow to register and transmit
the PASN authentication frames on NAN interface and set the keys to driver or
underlying modules on NAN interface.

The driver needs to configure the feature flag NL80211_EXT_FEATURE_SECURE_NAN,
which also helps userspace modules to know if the driver supports secure NAN.

Signed-off-by: Vinay Gannevaram <quic_vganneva@quicinc.com>
Link: https://lore.kernel.org/r/1675519179-24174-1-git-send-email-quic_vganneva@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:35:02 +01:00
Aloka Dixit
b345f0637c wifi: cfg80211: include puncturing bitmap in channel switch events
Add puncturing bitmap in channel switch notifications
and corresponding trace functions.

Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Link: https://lore.kernel.org/r/20230131001227.25014-4-quic_alokad@quicinc.com
[fix qtnfmac]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:14:39 +01:00
Aloka Dixit
d7c1a9a0ed wifi: nl80211: validate and configure puncturing bitmap
- New feature flag, NL80211_EXT_FEATURE_PUNCT, to advertise
  driver support for preamble puncturing in AP mode.
- New attribute, NL80211_ATTR_PUNCT_BITMAP, to receive a puncturing
  bitmap from the userspace during AP bring up (NL80211_CMD_START_AP)
  and channel switch (NL80211_CMD_CHANNEL_SWITCH) operations. Each bit
  corresponds to a 20 MHz channel in the operating bandwidth, lowest
  bit for the lowest channel. Bit set to 1 indicates that the channel
  is punctured. Higher 16 bits are reserved.
- New members added to structures cfg80211_ap_settings and
  cfg80211_csa_settings to propagate the bitmap to the driver after
  validation.

Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Signed-off-by: Muna Sinada <quic_msinada@quicinc.com>
Link: https://lore.kernel.org/r/20230131001227.25014-3-quic_alokad@quicinc.com
[move validation against 0xffff into policy]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:13:24 +01:00
Jaewan Kim
90b2c3cc4b wifi: nl80211: return error message for malformed chandef
Add an error message to the missing frequency case to have all
-EINVAL in nl80211_parse_chandef() return a better error.

Signed-off-by: Jaewan Kim <jaewan@google.com>
Link: https://lore.kernel.org/r/20230130074514.1560021-1-jaewan@google.com
[rewrite commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:09:18 +01:00
Alvin Šipraga
cba7217a92 wifi: nl80211: add MLO_LINK_ID to CMD_STOP_AP event
nl80211_send_ap_stopped() can be called multiple times on the same
netdev for each link when using Multi-Link Operation. Add the
MLO_LINK_ID attribute to the event to allow userspace to distinguish
which link the event is for.

Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Link: https://lore.kernel.org/r/20230128125844.2407135-2-alvin@pqrs.dk
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:09:17 +01:00
Alvin Šipraga
77669c151f wifi: nl80211: emit CMD_START_AP on multicast group when an AP is started
Userspace processes such as network daemons may wish to be informed when
any AP interface is brought up on the system, for example to initiate a
(re)configuration of IP settings or to start a DHCP server.

Currently nl80211 does not broadcast any such event on its multicast
groups, leaving userspace only two options:

1. the process must be the one that actually issued the
   NL80211_CMD_START_AP request, so that it can react on the response to
   that request;

2. the process must react to RTM_NEWLINK events indicating a change in
   carrier state, and may query for further information about the AP and
   react accordingly.

Option (1) is robust, but it does not cover all scenarios. It is easy to
imagine a situation where this is not the case (e.g. hostapd +
systemd-networkd).

Option (2) is not robust, because RTM_NEWLINK events may be silently
discarded by the linkwatch logic (cf. linkwatch_fire_event()).
Concretely, consider a scenario in which the carrier state flip-flops in
the following way:

 ^ carrier state (high/low = carrier/no carrier)
 |
 |        _______      _______ ...
 |       |       |    |
 | ______| "foo" |____| "bar"             (SSID in "quotes")
 |
 +-------A-------B----C---------> time

If the time interval between (A) and (C) is less than 1 second, then
linkwatch may emit only a single RTM_NEWLINK event indicating carrier
gain.

This is problematic because it is possible that the network
configuration that should be applied is a function of the AP's
properties such as SSID (cf. SSID= in systemd.network(5)). As
illustrated in the above diagram, it may be that the AP with SSID "bar"
ends up being configured as though it had SSID "foo".

Address the above issue by having nl80211 emit an NL80211_CMD_START_AP
message on the MLME nl80211 multicast group. This allows for arbitrary
processes to be reliably informed.

Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Link: https://lore.kernel.org/r/20230128125844.2407135-1-alvin@pqrs.dk
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:09:17 +01:00
Veerendranath Jakkam
8bb588d975 wifi: cfg80211: Extend cfg80211_update_owe_info_event() for MLD AP
Add support to offload OWE processing to user space for MLD AP when
driver's SME in use.

Add new parameters in struct cfg80211_update_owe_info to provide below
information in cfg80211_update_owe_info_event() call:
- MLO link ID of the AP, with which station requested (re)association.
  This is applicable for both MLO and non-MLO station connections when
  the AP affiliated with an MLD.
- Station's MLD address if the connection is MLO capable.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230126143256.960563-3-quic_vjakkam@quicinc.com
[reformat the trace event macro]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 12:00:25 +01:00
Veerendranath Jakkam
a42e59eb96 wifi: cfg80211: Extend cfg80211_new_sta() for MLD AP
Add support for drivers to indicate STA connection(MLO/non-MLO) when
user space SME (e.g., hostapd) is not used for MLD AP.

Add new parameters in struct station_info to provide below information
in cfg80211_new_sta() call:
- MLO link ID of the AP, with which station completed (re)association.
  This is applicable for both MLO and non-MLO station connections when
  the AP affiliated with an MLD.
- Station's MLD address if the connection is MLO capable.
- (Re)Association Response IEs sent to the station. User space needs
  this to determine rejected and accepted affiliated links information
  of the connected station if the connection is MLO capable.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230126143256.960563-2-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 11:53:34 +01:00
Veerendranath Jakkam
9a47c1ef5a wifi: cfg80211: Authentication offload to user space for MLO connection in STA mode
Currently authentication request event interface doesn't have support to
indicate the user space whether it should enable MLO or not during the
authentication with the specified AP. But driver needs such capability
since the connection is MLO or not decided by the driver in case of SME
offload to the driver.

Add support for driver to indicate MLD address of the AP in
authentication offload request to inform user space to enable MLO during
authentication process. Driver shall look at NL80211_ATTR_MLO_SUPPORT
flag capability in NL80211_CMD_CONNECT to know whether the user space
supports enabling MLO during the authentication offload.

User space should enable MLO during the authentication only when it
receives the AP MLD address in authentication offload request. User
space shouldn't enable MLO if the authentication offload request doesn't
indicate the AP MLD address even if the AP is MLO capable.

When MLO is enabled, user space should use the MAC address of the
interface (on which driver sent request) as self MLD address. User space
and driver to use MLD addresses in RA, TA and BSSID fields of the frames
between them, and driver translates the MLD addresses to/from link
addresses based on the link chosen for the authentication.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230116125058.1604843-1-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14 11:06:23 +01:00
Shivani Baranwal
648fba791c wifi: cfg80211: Support 32 bytes KCK key in GTK rekey offload
Currently, maximum KCK key length supported for GTK rekey offload is 24
bytes but with some newer AKMs the KCK key length can be 32 bytes. e.g.,
00-0F-AC:24 AKM suite with SAE finite cyclic group 21. Add support to
allow 32 bytes KCK keys in GTK rekey offload.

Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20221206143715.1802987-3-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-01-18 17:31:50 +01:00
Shivani Baranwal
df4969ca13 wifi: cfg80211: Fix extended KCK key length check in nl80211_set_rekey_data()
The extended KCK key length check wrongly using the KEK key attribute
for validation. Due to this GTK rekey offload is failing when the KCK
key length is 24 bytes even though the driver advertising
WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK flag. Use correct attribute to fix the
same.

Fixes: 093a48d2aa ("cfg80211: support bigger kek/kck key length")
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20221206143715.1802987-2-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-01-18 17:31:50 +01:00
Yuan Can
5cc58b3766 wifi: nl80211: Add checks for nla_nest_start() in nl80211_send_iface()
As the nla_nest_start() may fail with NULL returned, the return value needs
to be checked.

Fixes: ce08cd344a ("wifi: nl80211: expose link information for interfaces")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221129014211.56558-1-yuancan@huawei.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-12-01 13:50:21 +01:00
Jakub Kicinski
20b0b53aca genetlink: introduce split op representation
We currently have two forms of operations - small ops and "full" ops
(or just ops). The former does not have pointers for some of the less
commonly used features (namely dump start/done and policy).

The "full" ops, however, still don't contain all the necessary
information. In particular the policy is per command ID, while
do and dump often accept different attributes. It's also not
possible to define different pre_doit and post_doit callbacks
for different commands within the family.

At the same time a lot of commands do not support dumping and
therefore all the dump-related information is wasted space.

Create a new command representation which can hold info about
a do implementation or a dump implementation, but not both at
the same time.

Use this new representation on the command execution path
(genl_family_rcv_msg) as we either run a do or a dump and
don't have to create a "full" op there.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-11-07 12:30:16 +00:00
Johannes Berg
dfd2d876b3 Merge remote-tracking branch 'wireless/main' into wireless-next
Pull in wireless/main content since some new code would
otherwise conflict with it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-10 11:03:43 +02:00
Vinayak Yadawad
0ff57171d6 cfg80211: Update Transition Disable policy during port authorization
In case of 4way handshake offload, transition disable policy
updated by the AP during EAPOL 3/4 is not updated to the upper layer.
This results in mismatch between transition disable policy
between the upper layer and the driver. This patch addresses this
issue by updating transition disable policy as part of port
authorization indication.

Signed-off-by: Vinayak Yadawad <vinayak.yadawad@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07 15:27:40 +02:00
Johannes Berg
1e0f8cc96b wifi: nl80211: use link ID in NL80211_CMD_SET_BSS
We clearly need the link ID here, to know the right BSS
to configure. Use/require it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07 15:24:04 +02:00
Johannes Berg
53ad07e982 wifi: cfg80211: support reporting failed links
For assoc and connect result APIs, support reporting
failed links; they should still come with the BSS
pointer in the case of assoc, so they're released
correctly. In the case of connect result, this is
optional.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07 15:23:48 +02:00
Kees Cook
10d5ea5a43 wifi: nl80211: Split memcpy() of struct nl80211_wowlan_tcp_data_token flexible array
To work around a misbehavior of the compiler's ability to see into
composite flexible array structs (as detailed in the coming memcpy()
hardening series[1]), split the memcpy() of the header and the payload
so no false positive run-time overflow warning will be generated.

[1] https://lore.kernel.org/linux-hardening/20220901065914.1417829-2-keescook@chromium.org/

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07 15:19:06 +02:00
David S. Miller
9837ec955b drivers
- rtw89: large update across the map, e.g. coex, pci(e), etc.
  - ath9k: uninit memory read fix
  - ath10k: small peer map fix and a WCN3990 device fix
  - wfx: underflow
 
 stack
  - the "change MAC address while IFF_UP" change from James
    we discussed
  - more MLO work, including a set of fixes for the previous
    code, now that we have more code we can exercise it more
  - prevent some features with MLO that aren't ready yet
    (AP_VLAN and 4-address connections)
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Merge tag 'wireless-next-2022-09-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Johannes Berg says:

====================
drivers
 - rtw89: large update across the map, e.g. coex, pci(e), etc.
 - ath9k: uninit memory read fix
 - ath10k: small peer map fix and a WCN3990 device fix
 - wfx: underflow

stack
 - the "change MAC address while IFF_UP" change from James
   we discussed
 - more MLO work, including a set of fixes for the previous
   code, now that we have more code we can exercise it more
 - prevent some features with MLO that aren't ready yet
   (AP_VLAN and 4-address connections)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2022-09-04 11:24:34 +01:00
Johannes Berg
6522047c65 wifi: nl80211: add MLD address to assoc BSS entries
Add an MLD address attribute to BSS entries that the interface
is currently associated with to help userspace figure out what's
going on.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-03 17:04:29 +02:00
Jinpeng Cui
a21cd7d63b wifi: nl80211: remove redundant err variable
Return value from rdev_set_mcast_rate() directly instead of
taking this in another redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Jinpeng Cui <cui.jinpeng2@zte.com.cn>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-03 17:01:09 +02:00
Jakub Kicinski
9c5d03d362 genetlink: start to validate reserved header bytes
We had historically not checked that genlmsghdr.reserved
is 0 on input which prevents us from using those precious
bytes in the future.

One use case would be to extend the cmd field, which is
currently just 8 bits wide and 256 is not a lot of commands
for some core families.

To make sure that new families do the right thing by default
put the onus of opting out of validation on existing families.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Paul Moore <paul@paul-moore.com> (NetLabel)
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-08-29 12:47:15 +01:00
Veerendranath Jakkam
b8c9024e0e wifi: cfg80211: Add link_id to cfg80211_ch_switch_started_notify()
Add link_id parameter to cfg80211_ch_switch_started_notify() to allow
driver to indicate on which link channel switch started on MLD.

Send the data to userspace so it knows as well.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20220722131143.3438042-1-quic_vjakkam@quicinc.com
Link: https://lore.kernel.org/r/20220722131143.3438042-2-quic_vjakkam@quicinc.com
[squash two patches]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25 11:07:26 +02:00
Veerendranath Jakkam
7a77cd47ec wifi: nl80211: send MLO links channel info in GET_INTERFACE
Currently, MLO link level channel information not sent to
userspace when NL80211_CMD_GET_INTERFACE requested on MLD.

Add support to send channel information for all valid links
for NL80211_CMD_GET_INTERFACE request.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20220722131000.3437894-1-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25 11:05:07 +02:00
Johannes Berg
ea5cba269f wifi: cfg80211/mac80211: check EHT capability size correctly
For AP/non-AP the EHT MCS/NSS subfield size differs, the
4-octet subfield is only used for 20 MHz-only non-AP STA.
Pass an argument around everywhere to be able to parse it
properly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25 10:41:24 +02:00
Veerendranath Jakkam
e7a7b84e33 wifi: cfg80211: Add link_id parameter to various key operations for MLO
Add support for various key operations on MLD by adding new parameter
link_id. Pass the link_id received from userspace to driver for add_key,
get_key, del_key, set_default_key, set_default_mgmt_key and
set_default_beacon_key to support configuring keys specific to each MLO
link. Userspace must not specify link ID for MLO pairwise key since it
is common for all the MLO links.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20220730052643.1959111-4-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25 10:41:05 +02:00
Shaul Triebitz
9d2bb84d54 wifi: cfg80211: add link id to txq params
The Tx queue parameters are per link, so add the link ID
from nl80211 parameters to the API.

While at it, lock the wdev when calling into the driver
so it (and we) can check the link ID appropriately.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25 10:40:55 +02:00
Johannes Berg
95f498bb49 wifi: nl80211: add MLO link ID to the NL80211_CMD_FRAME TX API
Allow optionally specifying the link ID to transmit on,
which can be done instead of the link frequency, on an
MLD addressed frame. Both can also be omitted in which
case the frame must be MLD addressed and link selection
(and address translation) will be done on lower layers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:33 +02:00
Johannes Berg
6074c9e574 wifi: cfg80211: report link ID in NL80211_CMD_FRAME
If given by the underlying driver, report the link ID for
MLO in NL80211_CMD_FRAME.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:30 +02:00
Avraham Stern
1ff715ffa0 wifi: cfg80211: add hardware timestamps to frame RX info
Add hardware timestamps to management frame RX info.
This shall be used by drivers that support hardware timestamping for
Timing measurement and Fine timing measurement action frames RX.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:27 +02:00
Avraham Stern
00b3d84010 wifi: cfg80211/nl80211: move rx management data into a struct
The functions for reporting rx management take many arguments.
Collect all the arguments into a struct, which also make it easier
to add more arguments if needed.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:26 +02:00
Avraham Stern
ea7d50c925 wifi: cfg80211: add a function for reporting TX status with hardware timestamps
Add a function for reporting TX status with hardware timestamps. This
function shall be used for reporting the TX status of Timing
measurement and Fine timing measurement action frames by devices that
support reporting hardware timestamps.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:24 +02:00
Johannes Berg
8876c67e62 wifi: nl80211: require MLD address on link STA add/modify
We always need the MLD address and link ID to add or
modify the link STA, so require it in the API.

Fixes: 577e5b8c39 ("wifi: cfg80211: add API to add/modify/remove a link station")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22 14:28:13 +02:00
Johannes Berg
ff5c4dc4cd wifi: nl80211: fix some attribute policy entries
The new NL80211_CMD_ADD_LINK_STA and NL80211_CMD_MODIFY_LINK_STA
commands have strict policy validation, so fix the policy so it
can be validated correctly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:21 +02:00
Johannes Berg
df35f3164e wifi: nl80211: reject fragmented and non-inheritance elements
The underlying mac80211 code cannot deal with fragmented
elements for purposes of sorting the elements into the
association frame, so reject those inside the link. We
might want to reject them inside the assoc frame, but
they're used today for FILS, so cannot do that.

The non-inheritance element inside the links similarly
cannot be handled by mac80211, and outside the links it
makes no sense.

Reject both since using them could lead to an incorrect
implementation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:21 +02:00
Johannes Berg
34d76a14f8 wifi: nl80211: reject link specific elements on assoc link
When we associate, we'll include all the elements for the
link we're sending the association request on in the frame
and the specific ones for other links in the multi-link
element container. Prohibit adding link-specific elements
for the association link.

Fixes: d648c23024 ("wifi: nl80211: support MLO in auth/assoc")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:21 +02:00
Johannes Berg
fa2ca639c4 wifi: nl80211: advertise MLO support
At least while we don't have any more specific interface
combinations support, add a simple flag for MLO support,
we can keep this later based on something other than the
wiphy flag.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:20 +02:00
Ilan Peer
69c3f2d30c wifi: nl80211: allow link ID in set_wiphy with frequency
This simplifies hostapd implementation, since it didn't
switch to NL80211_CMD_SET_CHANNEL.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:20 +02:00
Andrei Otcheretianski
67207bab93 wifi: cfg80211/mac80211: Support control port TX from specific link
In case of authentication with a legacy station, link addressed EAPOL
frames should be sent. Support it.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Andrei Otcheretianski
d2bc52498b wifi: nl80211: Support MLD parameters in nl80211_set_station()
Set the MLD parameters in NL80211_CMD_SET_STATION handling
to be able to change an MLD station.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Johannes Berg
45aaf17c0c wifi: nl80211: check MLO support in authenticate
We should check that MLO connections are supported before
attempting to authenticate with MLO parameters, check that.

Fixes: d648c23024 ("wifi: nl80211: support MLO in auth/assoc")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Johannes Berg
9b6bf4d612 wifi: nl80211: set BSS to NULL if IS_ERR()
If the BSS lookup returned an error, set it to NULL so we
don't try to free it.

Fixes: d648c23024 ("wifi: nl80211: support MLO in auth/assoc")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Johannes Berg
4e9c3af398 wifi: nl80211: add EML/MLD capabilities to per-iftype capabilities
We have the per-interface type capabilities, currently for
extended capabilities, add the EML/MLD capabilities there
to have this advertised by the driver.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Johannes Berg
efbfe5165e wifi: nl80211: better validate link ID for stations
If we add a station on an MLD, we need a link ID to see
where it lives (by default). Validate the link ID against
the valid_links.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:19 +02:00
Johannes Berg
cdf0a0a80c wifi: cfg80211: clean up links appropriately
This was missing earlier, we need to remove links when
interfaces are being destroyed, and we also need to
stop (AP) operations when a link is being destroyed.
Address these issues to remove many warnings that will
otherwise appear in mac80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:18 +02:00
Johannes Berg
cd47c0f57a wifi: cfg80211: put cfg80211_rx_assoc_resp() arguments into a struct
For MLO we'll need a lot more arguments, including all the
BSS pointers and link addresses, so move the data to a struct
to be able to extend it more easily later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:17 +02:00
Johannes Berg
e69dac88a1 wifi: cfg80211: adjust assoc comeback for MLO
We only report the BSSID to userspace, so change the
argument from BSS struct pointer to AP address, which
we'll use to carry either the BSSID or AP MLD address.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:17 +02:00
Johannes Berg
284b38b690 wifi: nl80211: acquire wdev mutex for dump_survey
At least the quantenna driver calls wdev_chandef() here
which now requires the lock, so acquire it.

Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:15 +02:00
Shaul Triebitz
c0d6701261 wifi: nl80211: enable setting the link address at new station
Since for an MLD station the default link is added together
with the add station command, allow also setting the link
MAC address.
Otherwise, it is needed to use the modify link API only
for setting the link MAC address.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:14 +02:00
Johannes Berg
3d1cc7cdf2 wifi: nl80211: hold wdev mutex for station APIs
Since this will need to refer - at least in part - to the link
stations of an MLD, hold the wdev mutex for driver convenience.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:13 +02:00
Johannes Berg
4e2f3d67e3 wifi: nl80211: hold wdev mutex for channel switch APIs
Since we deal with links in an MLD here, hold the wdev
mutex now.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:13 +02:00
Johannes Berg
858fd1880b wifi: nl80211: hold wdev mutex in add/mod/del link station
Since we deal with links, and that requires looking at wdev links,
we should hold the wdev mutex for driver convenience.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:13 +02:00
Shaul Triebitz
b95eb7f0ee wifi: cfg80211/mac80211: separate link params from station params
Put the link_station_parameters structure in the station_parameters
structure (and remove the station_parameters fields already existing
in link_station_parameters).
Now, for an MLD station, the default link is added together with
the station.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:13 +02:00
Shaul Triebitz
577e5b8c39 wifi: cfg80211: add API to add/modify/remove a link station
Add an API for adding/modifying/removing a link of a station.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15 11:43:13 +02:00
Veerendranath Jakkam
3c512307de wifi: nl80211: fix sending link ID info of associated BSS
commit dd374f84ba ("wifi: nl80211: expose link ID for associated
BSSes") used a top-level attribute to send link ID of the associated
BSS in the nested attribute NL80211_ATTR_BSS. But since NL80211_ATTR_BSS
is a nested attribute of the attributes defined in enum nl80211_bss,
define a new attribute in enum nl80211_bss and use it for sending the
link ID of the BSS.

Fixes: dd374f84ba ("wifi: nl80211: expose link ID for associated BSSes")
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20220708122607.1836958-1-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-11 10:20:18 +02:00
Veerendranath Jakkam
ff3821bc35 wifi: nl80211: Fix reading NL80211_ATTR_MLO_LINK_ID in nl80211_pre_doit
nl80211_pre_doit() using nla_get_u16() to read u8 attribute
NL80211_ATTR_MLO_LINK_ID. Fix this by using nla_get_u8() to
read NL80211_ATTR_MLO_LINK_ID attribute.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/1657517683-5724-1-git-send-email-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-11 10:19:32 +02:00
Aloka Dixit
8bc65d38ee wifi: nl80211: retrieve EHT related elements in AP mode
Add support to retrieve EHT capabilities and EHT operation elements
passed by the userspace in the beacon template and store the pointers
in struct cfg80211_ap_settings to be used by the drivers.

Co-developed-by: Vikram Kandukuri <quic_vikram@quicinc.com>
Signed-off-by: Vikram Kandukuri <quic_vikram@quicinc.com>
Co-developed-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Link: https://lore.kernel.org/r/20220523064904.28523-1-quic_alokad@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01 12:37:54 +02:00
Veerendranath Jakkam
ecad3b0b99 wifi: cfg80211: Increase akm_suites array size in cfg80211_crypto_settings
Increase akm_suites array size in struct cfg80211_crypto_settings to 10
and advertise the capability to userspace. This allows userspace to send
more than two AKMs to driver in netlink commands such as
NL80211_CMD_CONNECT.

This capability is needed for implementing WPA3-Personal transition mode
correctly with any driver that handles roaming internally. Currently,
the possible AKMs for multi-AKM connect can include PSK, PSK-SHA-256,
SAE, FT-PSK and FT-SAE. Since the count is already 5, increasing
the akm_suites array size to 10 should be reasonable for future
usecases.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/1653312358-12321-1-git-send-email-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01 12:07:08 +02:00
Johannes Berg
c2653990d5 wifi: nl80211: acquire wdev mutex earlier in start_ap
We need to hold the wdev mutex already in order to call
nl80211_parse_tx_bitrate_mask(), so acquire it earlier.

Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01 11:18:38 +02:00
Johannes Berg
206bbcf761 wifi: nl80211: hold wdev mutex for tid config
We need wdev_chandef() in this code, which now requires
the wdev mutex due to the per-link nature. Hold it here
to make sure we can access the link.

Reported-by: syzbot+b4e9aa0f32ffd9902442@syzkaller.appspotmail.com
Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01 11:14:04 +02:00
Johannes Berg
77e7b6ba78 wifi: cfg80211: handle IBSS in channel switch
Prior to commit 7b0a0e3c3a ("wifi: cfg80211: do some
rework towards MLO link APIs") the interface type didn't
really matter here, but now we need to handle all of the
possible cases. Add IBSS ("ADHOC") and handle it.

Fixes: 7b0a0e3c3a ("wifi: cfg80211: do some rework towards MLO link APIs")
Reported-by: syzbot+90d912872157e63589e4@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01 11:13:50 +02:00
Veerendranath Jakkam
efbabc1165 cfg80211: Indicate MLO connection info in connect and roam callbacks
The MLO links used for connection with an MLD AP are decided by the
driver in case of SME offloaded to driver.

Add support for the drivers to indicate the information of links used
for MLO connection in connect and roam callbacks, update the connected
links information in wdev from connect/roam result sent by driver.
Also, send the connected links information to userspace.

Add a netlink flag attribute to indicate that userspace supports
handling of MLO connection. Drivers must not do MLO connection when this
flag is not set. This is to maintain backwards compatibility with older
supplicant versions which doesn't have support for MLO connection.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:57:09 +02:00
Johannes Berg
dd374f84ba wifi: nl80211: expose link ID for associated BSSes
When retrieving scan data, expose not just whether or not the
interface (possibly an MLD) is associated to the BSS or not,
but also on which link ID if it is an MLD.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:57:08 +02:00
Johannes Berg
ce08cd344a wifi: nl80211: expose link information for interfaces
When getting/dumping an interface, expose information about
valid links.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:57:08 +02:00
Johannes Berg
f2a0290b2d wifi: cfg80211: add optional link add/remove callbacks
Add some optional callbacks for link add/remove so that
drivers can react here. Initially, I thought it would be
sufficient to just create the link in start_ap etc., but
it turns out that's not so simple, since there are quite
a few callbacks that can be called: if they're erroneously
without start_ap, things might crash.

Thus it might be easier for drivers to allocate all the
necessary data structures immediately, to not have to
worry about it in each callback, since cfg80211 checks
that the link ID is valid (has been added.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:56:11 +02:00
Johannes Berg
d648c23024 wifi: nl80211: support MLO in auth/assoc
For authentication, we need the BSS, the link_id and the AP
MLD address to create the link and station, (for now) the
driver assigns a link address and sends the frame, the MLD
address needs to be the address of the interface.

For association, pass the list of BSSes that were selected
for the MLO connection, along with extra per-STA profile
elements, the AP MLD address and the link ID on which the
association request should be sent.

Note that for now we don't have a proper way to pass the link
address(es) and so the driver/mac80211 will select one, but
depending on how that selection works it means that assoc w/o
auth data still being around (mac80211 implementation detail)
the association won't necessarily work - so this will need to
be extended in the future to sort out the link addressing.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:55:57 +02:00
Johannes Berg
325839da95 wifi: cfg80211: simplify cfg80211_mlme_auth() prototype
This function has far too many parameters now, move out
the BSS lookup and pass the request struct instead.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:55:48 +02:00
Johannes Berg
9ecff10e82 wifi: nl80211: refactor BSS lookup in nl80211_associate()
For MLO we'll need to do this multiple times, so refactor
this. For now keep the disconnect_bssid, but we'll need to
figure out how to handle that with MLD.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:55:45 +02:00
Johannes Berg
0f7594489a wifi: cfg80211: mlme: get BSS entry outside cfg80211_mlme_assoc()
Today it makes more sense to pass the necessary parameters to
look up the BSS entry to cfg80211_mlme_assoc(), but with MLO
we will need to look up multiple, and that gets awkward. Pull
the lookup code into the callers so we can change it better.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:55:43 +02:00
Johannes Berg
7b0a0e3c3a wifi: cfg80211: do some rework towards MLO link APIs
In order to support multi-link operation with multiple links,
start adding some APIs. The notable addition here is to have
the link ID in a new nl80211 attribute, that will be used to
differentiate the links in many nl80211 operations.

So far, this patch adds the netlink NL80211_ATTR_MLO_LINK_ID
attribute (as well as the NL80211_ATTR_MLO_LINKS attribute)
and plugs it through the system in some places, checking the
validity etc. along with other infrastructure needed for it.

For now, I've decided to include only the over-the-air link
ID in the API. I know we discussed that we eventually need to
have to have other ways of identifying a link, but for local
AP mode and auth/assoc commands as well as set_key etc. we'll
use the OTA ID.

Also included in this patch is some refactoring of the data
structures in struct wireless_dev, splitting for the first
time the data into type dependent pieces, to make reasoning
about these things easier.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20 12:54:58 +02:00
Jakub Kicinski
d353e1a3ba wireless-next patches for v5.19
Second set of patches for v5.19 and most likely the last one. rtw89
 got support for 8852ce devices and mt76 now supports Wireless Ethernet
 Dispatch.
 
 Major changes:
 
 cfg80211/mac80211
 
 * support disabling EHT mode
 
 rtw89
 
 * add support for Realtek 8852ce devices
 
 mt76
 
 * Wireless Ethernet Dispatch support for flow offload
 
 * non-standard VHT MCS10-11 support
 
 * mt7921 AP mode support
 
 * mt7921 ipv6 NS offload support
 
 ath11k
 
 * enable keepalive during WoWLAN suspend
 
 * implement remain-on-channel support
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Merge tag 'wireless-next-2022-05-19' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Kalle Valo says:

====================
wireless-next patches for v5.19

Second set of patches for v5.19 and most likely the last one. rtw89
got support for 8852ce devices and mt76 now supports Wireless Ethernet
Dispatch.

Major changes:

cfg80211/mac80211
 - support disabling EHT mode

rtw89
 - add support for Realtek 8852ce devices

mt76
 - Wireless Ethernet Dispatch support for flow offload
 - non-standard VHT MCS10-11 support
 - mt7921 AP mode support
 - mt7921 ipv6 NS offload support

ath11k
 - enable keepalive during WoWLAN suspend
 - implement remain-on-channel support

* tag 'wireless-next-2022-05-19' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (135 commits)
  iwlwifi: mei: fix potential NULL-ptr deref
  iwlwifi: mei: clear the sap data header before sending
  iwlwifi: mvm: remove vif_count
  iwlwifi: mvm: always tell the firmware to accept MCAST frames in BSS
  iwlwifi: mvm: add OTP info in case of init failure
  iwlwifi: mvm: fix assert 1F04 upon reconfig
  iwlwifi: fw: init SAR GEO table only if data is present
  iwlwifi: mvm: clean up authorized condition
  iwlwifi: mvm: use NULL instead of ERR_PTR when parsing wowlan status
  iwlwifi: pcie: simplify MSI-X cause mapping
  rtw89: pci: only mask out INT indicator register for disable interrupt v1
  rtw89: convert rtw89_band to nl80211_band precisely
  rtw89: 8852c: update txpwr tables to HALRF_027_00_052
  rtw89: cfo: check mac_id to avoid out-of-bounds
  rtw89: 8852c: set TX antenna path
  rtw89: add ieee80211::sta_rc_update ops
  wireless: Fix Makefile to be in alphabetical order
  mac80211: refactor freeing the next_beacon
  cfg80211: fix kernel-doc for cfg80211_beacon_data
  mac80211: minstrel_ht: support ieee80211_rate_status
  ...
====================

Link: https://lore.kernel.org/r/20220519153334.8D051C385AA@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-05-19 13:01:08 -07:00