Currently user regulatory hint is ignored if all wiphys
in the system are self managed. But the hint is not ignored
if there is no wiphy in the system. This affects the global
regulatory setting. Global regulatory setting needs to be
maintained so that it can be applied to a new wiphy entering
the system. Therefore, do not ignore user regulatory setting
even if all wiphys in the system are self managed.
Signed-off-by: Amar Singhal <asinghal@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Bring in net-next which had pulled in net, so I have the changes
from mac80211 and can apply a patch that would otherwise conflict.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Some drivers may call this function when regdb is not initialized yet,
so we need to make sure regdb is valid before trying to access it.
Make sure regdb is initialized before trying to access it in
reg_query_regdb_wmm() and query_regdb().
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Trivial fix to spelling mistake in pr_debug message text
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Currently the regulatory core does not call the regulatory callback
reg_notifier for self managed wiphys, but regulatory_hint_user() call is
independent of wiphy and is meant for all wiphys in the system. Even a
self managed wiphy may be interested in regulatory_hint_user() to know
the country code from a trusted regulatory domain change like a cellular
base station. Therefore, for the regulatory source
NL80211_REGDOM_SET_BY_USER and the user hint type
NL80211_USER_REG_HINT_CELL_BASE, call the regulatory notifier.
No current wlan driver uses the REGULATORY_WIPHY_SELF_MANAGED flag while
also registering the reg_notifier regulatory callback, therefore there
will be no impact on existing drivers without them being explicitly
modified to take advantage of this new possibility.
Signed-off-by: Amar Singhal <asinghal@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
'wmm_ptrs' is malloced in regdb_query_country() and should be freed
before leaving from the error handling cases, otherwise it will cause
memory leak.
Fixes: 230ebaa189 ("cfg80211: read wmm rules from regulatory database")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
[johannes: add Fixes tag]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The 'country IE' messages in the log can be confusing and make people think
that the country code has been set to Ireland. Fix this by changing the
log messages to use 'country element' instead (as they are no longer called
'information element' in the spec anyway).
Reported-by: Bernhard Gabler <Bernhard_Gabler@web.de>
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In general regulatory self managed devices maintain their own
regulatory profiles thus it doesn't have to query the regulatory database
on country change.
ETSI has recently introduced a new channel access mechanism for 5GHz
that all wlan devices need to comply with.
These values are stored in the regulatory database.
There are self managed devices which can't maintain these
values on their own. Add API to allow self managed regulatory devices
to query the regulatory database for high band wmm rule.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
[johannes: fix documentation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The whole code is set up to allow RCU reads of this data, but
then uses rtnl_dereference() which requires the RTNL. Convert
it to rcu_dereference_rtnl() which makes it require only RCU
or the RTNL, to allow RCU-protected reading of the data.
Reviewed-by: Coelho, Luciano <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
ETSI EN 301 893 v2.1.1 (2017-05) standard defines a new channel access
mechanism that all devices (WLAN and LAA) need to comply with.
The regulatory database can now be loaded into the kernel and also
has the option to load optional data.
In order to be able to comply with ETSI standard, we add wmm_rule into
regulatory rule and add the option to read its value from the regulatory
database.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
[johannes: fix memory leak in error path]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Paul reported that he got a report about undefined behaviour
that seems to me to originate in using uninitialized memory
when the channel structure here is used in the event code in
nl80211 later.
He never reported whether this fixed it, and I wasn't able
to trigger this so far, but we should do the right thing and
fully initialize the on-stack structure anyway.
Reported-by: Paul Menzel <pmenzel+linux-wireless@molgen.mpg.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When cfg80211 is built as a module, everything is fine, and we
can keep the code as is; in fact, we have to, because there can
only be a single module_init().
When cfg80211 is built-in, however, it needs to initialize
before drivers (device_initcall/module_init), and thus used to
be at subsys_initcall(). I'd moved it to fs_initcall() earlier,
where it can remain. However, this is still too early because at
that point the key infrastructure hasn't been initialized yet,
so X.509 certificates can't be parsed yet.
To work around this problem, load the regdb keys only later in
a late_initcall(), at which point the necessary infrastructure
has been initialized.
Fixes: 90a53e4432 ("cfg80211: implement regdb signature checking")
Reported-by: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The missing CONFIG_ prefix means this macro is never defined,
leading to a possible Kbuild warning:
net/wireless/reg.c:666:20: error: 'load_keys_from_buffer' defined but not used [-Werror=unused-function]
static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
When we use the correct symbol, the warning also goes away.
Fixes: 90a53e4432 ("cfg80211: implement regdb signature checking")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Currently CRDA implements the signature checking, and the previous
commits added the ability to load the whole regulatory database
into the kernel.
However, we really can't lose the signature checking, so implement
it in the kernel by loading a detached signature (regulatory.db.p7s)
and check it against built-in keys.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Parsing and building C structures from a regdb is no longer needed
since the "firmware" file (regulatory.db) can be linked into the
kernel image to achieve the same effect.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If the regulatory database is loaded, and then updated, it may
be necessary to reload it. Add an nl80211 command to do this.
Note that this just reloads the database, it doesn't re-apply
the rules from it immediately.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
As the current regulatory database is only about 4k big, and already
difficult to extend, we decided that overall it would be better to
get rid of the complications with CRDA and load the database into the
kernel directly, but in a new format that is extensible.
The new file format can be extended since it carries a length field
on all the structs that need to be extensible.
In order to be able to request firmware when the module initializes,
move cfg80211 from subsys_initcall() to the later fs_initcall(); the
firmware loader is at the same level but linked earlier, so it can
be called from there. Otherwise, when both the firmware loader and
cfg80211 are built-in, the request will crash the kernel. We also
need to be before device_initcall() so that cfg80211 is available
for devices when they initialize.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Honor the NL80211_RRF_NO_HT40{MINUS,PLUS} flags in
reg_process_ht_flags_channel. Not doing so leads can lead
to a firmware assert in iwlwifi for example.
Fixes: b0d7aa5959 ("cfg80211: allow wiphy specific regdomain management")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When part of a bigger bandwidth (160 MHz) channel falls in DFS
channel range it is possible that the center frequency may not
necessarily be a radar channel. Remove the sanity check on channel
flag for IEEE80211_CHAN_RADAR in regulatory_propagate_dfs_state(),
this should fix the dfs state propagation for non-DFS center freq
which has DFS channels in it's bandwidth, should also fix unnecessary
WARN_ON() spam in regulatory_propagate_dfs_state().
Fixes: 8976672736 ("cfg80211: Share Channel DFS state across wiphys of same DFS domain")
Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Sharing DFS channel state across multiple wiphys (radios) could
be useful with multiple radios on the system. When one radio
completes CAC and markes the channel available another radio
can use this information and start beaconing without really doing
CAC.
Whenever there is a state change in dfs channel associated to
a particular wiphy the the same state change is propagated to
other wiphys having the same DFS reg domain configuration.
Also when a new wiphy is created the dfs channel state of
other existing wiphys of same DFS domain is copied.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
DFS requirement for ETSI domain (section 4.7.1.4 in
ETSI EN 301 893 V1.8.1) is the only one which explicitly
states that once DFS channel is marked as available afer
the CAC, this channel will remain in available state even
moving to a different operating channel. But the same is
not explicitly stated in FCC DFS requirement. Also, Pre-CAC
requriements are not explicitly mentioned in FCC requirement.
Current implementation in keeping DFS channel in available
state is same as described in ETSI domain.
For non-ETSI DFS domain, this patch gives a grace period of 2 seconds
since the completion of successful CAC before moving the channel's
DFS state to 'usable' from 'available' state. The same grace period
is checked against the channel's dfs_state_entered timestamp while
deciding if a DFS channel is available for operation. There is a new
radar event, NL80211_RADAR_PRE_CAC_EXPIRED, reported when DFS channel
is moved from available to usable state after the grace period. Also
make sure the DFS channel state is reset to usable once the beaconing
operation on that channel is brought down (like stop_ap, leave_ibss
and leave_mesh) in non-ETSI domain.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
It is needed for another cfg80211 helper that will be out of reg.c so
move it to common util.c file and make it non-static.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
There's no harm in having drivers read the list, since they can
use RCU protection or RTNL locking; allow this to not require
each and every driver to also implement its own bookkeeping.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This enum is already perfectly aliased to enum nl80211_band, and
the only reason for it is that we get IEEE80211_NUM_BANDS out of
it. There's no really good reason to not declare the number of
bands in nl80211 though, so do that and remove the cfg80211 one.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of having this Kconfig option, which just *floods* the
kernel log,
* remove the per-channel prints that are fairly useless anyway
* convert the conditional printing to pr_debug()
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The rule definitions here aren't really valid, they would
be rejected if it came from userspace due to the bandwidth
specified being bigger than the rule's width.
This is fairly much inconsequential since the other rules
around them do enable the bandwidth, but express that better
using the NL80211_RRF_AUTO_BW flag.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Conflicts:
drivers/net/geneve.c
Here we had an overlapping change, where in 'net' the extraneous stats
bump was being removed whilst in 'net-next' the final argument to
udp_tunnel6_xmit_skb() was being changed.
Signed-off-by: David S. Miller <davem@davemloft.net>
The first leak occurs when entering the default case
in the switch for the initiator in set_regdom.
The second leaks a platform_device struct if the
platform registration in regulatory_init succeeds but
the sub sequent regulatory hint fails due to no memory.
Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The same piece of code appears at two places. Make a function from it.
Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The function is void and static, so just ifdef its contents
instead of duplicating the declaration.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Printing "N/A mBi" is strange - print just "N/A" instead.
Also add a missing opening parenthesis.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of having a lot of places that free ignored requests
and then return REG_REQ_OK, make reg_process_hint() process
REG_REQ_IGNORE by freeing the request, and let functions it
calls return that instead of freeing.
This also fixes a leak when a second (different) country IE
hint was ignored.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This function can only deal with treatment values OK and ALREADY_SET
so make the callees not return anything else and warn if they do.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If there's a built-in regulatory database, there may be little point
in also calling out to CRDA and failing if the system is configured
that way. Allow removing CRDA support to save ~1K kernel size.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When the functions reg_set_rd_driver() and reg_set_rd_country_ie()
return with an error, the calling function already restores data
by calling restore_regulatory_settings(), so there's no need to
also schedule a timeout (which would lead to other side effects
such as indicating CRDA failed, which clearly isn't true.) Remove
the scheduling.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of searching the built-in database only in the worker,
search it directly and return an error if the entry cannot be
found (or memory cannot be allocated.) This means that builtin
database queries no longer rely on the timeout.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The new name is more appropriate since in the case of a built-in
database it may not really rely on CRDA.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The function reg_call_crda() can't actually validly return
REG_REQ_IGNORE as it does now when calling CRDA fails since
that return value isn't handled properly. Fix that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* many internal fixes, API improvements, cleanups, etc.
* full AP client state tracking in cfg80211/mac80211 from Ayala
* VHT support (in mac80211) for mesh
* some A-MSDU in A-MPDU support from Emmanuel
* show current TX power to userspace (from Rafał)
* support for netlink dump in vendor commands (myself)
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Merge tag 'mac80211-next-for-davem-2015-10-05' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
For the current cycle, we have the following right now:
* many internal fixes, API improvements, cleanups, etc.
* full AP client state tracking in cfg80211/mac80211 from Ayala
* VHT support (in mac80211) for mesh
* some A-MSDU in A-MPDU support from Emmanuel
* show current TX power to userspace (from Rafał)
* support for netlink dump in vendor commands (myself)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The original assumption of 20MHz wide channels hasn't been true since
the addition of support for 5 and 10 MHz channels.
Change the code to no longer disable all channels that don't fit into
the 20MHz grid, but instead set the appropriate flags to disable
operation on specific bandwidths.
Signed-off-by: Matthias May <matthias.may@neratec.com>
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
