Responding to probe requests for scanning clients will often create
excessive retries, as it happens quite often that the scanning client
already left the channel. Therefore do it like hostapd and send probe
responses for wildcard SSID only once by using the noack flag.
Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
[fix typo & 'wildcard SSID' in commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The scheduled scan matchsets were intended to be a list of filters,
with the found BSS having to pass at least one of them to be passed
to the host. When the RSSI attribute was added, however, this was
broken and currently wpa_supplicant adds that attribute in its own
matchset; however, it doesn't intend that to mean that anything
that passes the RSSI filter should be passed to the host, instead
it wants it to mean that everything needs to also have higher RSSI.
This is semantically problematic because we have a list of filters
like [ SSID1, SSID2, SSID3, RSSI ] with no real indication which
one should be OR'ed and which one AND'ed.
To fix this, move the RSSI filter attribute into each matchset. As
we need to stay backward compatible, treat a matchset with only the
RSSI attribute as a "default RSSI filter" for all other matchsets,
but only if there are other matchsets (an RSSI-only matchset by
itself is still desirable.)
To make driver implementation easier, keep a global min_rssi_thold
for the entire request as well. The only affected driver is ath6kl.
I found this when I looked into the code after Raja Mani submitted
a patch fixing the n_match_sets calculation to disregard the RSSI,
but that patch didn't address the semantic issue.
Reported-by: Raja Mani <rmani@qti.qualcomm.com>
Acked-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The ieee80211_vif_use_channel() function calls
ieee80211_vif_release_channel(), so there's no need to call it
explicitly in __ieee80211_sta_join_ibss().
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The patch adds a missing sdata lock and adds a few
lockdeps for easier maintenance.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
radar_required setting wasn't protected by
local->mtx in some places. This should prevent
from scanning/radar detection/roc colliding.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The sdata->vif.csa_active could be left set after,
e.g. channel context constraints check fail in STA
mode leaving the interface in a strange state for
a brief period of time until it is disconnected.
This was harmless but ugly.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If CSA for AP interface failed and the interface
was not stopped afterwards another CSA request
would leak sdata->u.ap.next_beacon.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of having
ieee80211_bss_info_change_notify() scattered all
over the place just call it once when finalizing
CSA.
As a side effect this patch adds missing error
checking for IBSS CSA beacon update.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Reviewed-by: Luciano Coelho <luciano.coelho@intel.com>
[fix err vs. changed variable usage in ieee80211_csa_finalize()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
There are a few cases, e.g. suspend, where an AP interface is
stopped by the kernel rather than by userspace request, most
commonly when suspending. To let userspace know about this,
send the NL80211_CMD_STOP_AP command as an event every time
an AP interface is stopped. This also happens when userspace
did in fact request the AP stop, but that's not a problem.
For full-MAC drivers this may need to be extended to also
cover cases where the device stopped the AP operation for
some reason, this a bit more complicated because then all
cfg80211 state also needs to be reset; such API is not part
of this patch.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
A few places weren't checking that the frame passed to the
function actually has enough data even though the function
clearly documents it must have a payload byte. Make this
safer by changing the function to take an skb and checking
the length inside. The old version is preserved for now as
the rtl* drivers use it and don't have a correct skb.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If there's a policy, then nla_parse() return values must be
checked, otherwise the policy is useless and there's nothing
that ensures the attributes are actually what we expect them
to be.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
ATM, {ADD,DEL}BA and BAR frames are sent on the AC matching the TID of
the BA parameters. In the discussion [1] about this patch, Johannes
recalled that it fixed some races with the DELBA and indeed this
behavior was introduced in [2].
While [2] is right for the BARs, the part queueing the {ADD,DEL}BAs on
their BA params TID AC violates the spec and is more a workaround for
some drivers. Helmut expressed some concerns wrt such drivers, in
particular DELBAs in rt2x00.
ATM, DELBAs are sent after a driver has called (hence "purposely")
ieee80211_start_tx_ba_cb_irqsafe and Johannes and Emmanuel gave some
details wrt intentions behind the split of the IEEE80211_AMPDU_TX_STOP_*
given to the driver ampdu_action supposed to call this function, which
could prove handy to people trying to do the right thing in faulty
drivers (if their fw/hw don't get in their way).
[1] http://mid.gmane.org/1390391564-18481-1-git-send-email-karl.beldan@gmail.com
[2] Commit: cf6bb79ad8 ("mac80211: Use appropriate TID for sending BAR, ADDBA and DELBA frames")
Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Advertise to mac80211 that we can do channel switch both
for STA and AP/GO.
After each beacon transmission check if CSA is done and
call ieee80211_csa_finish if needed.
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When creating new devices, allow P2P-Device support to be
turned off to be able to test default behaviour with and
without the support.
Also add a module parameter for the default setting.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
There's not a single rate control algorithm actually in
a separate module where the module refcount would be
required. Similarly, there's no specific rate control
module.
Therefore, all the module handling code in rate control
is really just dead code, so remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The sample table is initialized only once at module start, so
is really __read_mostly. Additionally, the code to init it can
be marked __init since it will never be needed again, it is
likely automatically inlined into the __init function already
by the compiler, so this doesn't really make a difference.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The wiphy privid (to identify wiphys) and the cfg80211
ops should both be const, so change them to be.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Change the code to allow making all the rate control ops
const, nothing ever needs to change them. Also change all
drivers to make use of this and mark the ops const.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Restrict our published beamformee STS capability according
to the AP value.
Some AP show bad behaviour in interoperability testing
when our capabilities are better.
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Initialize the buffer to all zeroes, otherwise the stack
data might be interpreted as the TID, which is likely to
fail completely.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In case the given ROC duration is 0, update it to a minimal value before
setting the ieee80211_roc_work parameters, so it also would be valid
for cases where scan is in progress or there are other ROCs queued.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Since we copy the mesh_id_len into our own data structures,
use it consistently and don't sometimes use cfg80211's copy.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The mesh_id is an array so can't ever be NULL, it looks
like mesh_id_len check was intended instead. However,
since the previous patch, cfg80211 does the check, so
just remove it here.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Before allowing userspace to initiate a channel switch, check
that it's actually connected in some sense. Also use a more
appropriate error code for the not connected case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The mesh precedence value in ieee80211_channel_switch
should be incremented or set to 1 only if this is the
initiator of mesh channel switch. For non-initiator,
the precedence value has updated using the Mesh
Channel Switch Parameters element. Fix this.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fix the following issues in reg_process_hint():
1. Add verification that wiphy is valid before processing
NL80211_REGDOMAIN_SET_BY_COUNTRY_IE.
2. Free the request in case of invalid initiator.
3. Remove WARN_ON check on reg_request->alpha2 as it is not a
pointer.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When IEEE80211_HW_SIGNAL_UNSPEC is set, mac80211 will perform a
division by max_signal in ieee80211_bss_info_update. If max_signal
is not properly set by the driver (for example it is zero) this
leads to a divide error and crash.
Thanks to Larry Finger, who pointed me to this.
This patch adds in ieee80211_register_hw one more check to detect
this condition and eventually returns -EINVAL, as already done for
other checks already performed there.
Signed-off-by: andrea merello <andrea.merello@gmail.com>
[move to an already existing SIGNAL_UNSPEC check]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Commit 7ec7c4a9a6 ("mac80211: port CCMP to cryptoapi's CCM driver")
resulted in the 'encrypted' param of ccmp_special_blocks() to be no
longer used so it can be dropped from the prototype.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Allow to force SGI, LGI.
Mainly for test purpose.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This required liberally sprinkling 'const' over brcmfmac
and mwifiex but seems like a useful thing to do since the
pointer can't really be written.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Addition of the frequency hints showed up couple of places in cfg80211
where pointers could be marked const and a shared function could be used
to fetch a valid channel.
Signed-off-by: Jouni Malinen <j@w1.fi>
[fix mwifiex]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This allows drivers to advertise the maximum number of associated
stations they support in AP mode (including P2P GO). User space
applications can use this for cleaner way of handling the limit (e.g.,
hostapd rejecting IEEE 802.11 authentication without manual
configuration of the limit) or to figure out what type of use cases can
be executed with multiple devices before trying and failing.
Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This clarifies the expected driver behavior on the older
NL80211_ATTR_MAC and NL80211_ATTR_WIPHY_FREQ attributes and adds a new
set of similar attributes with _HINT postfix to enable use of a
recommendation of the initial BSS to choose. This can be helpful for
some drivers that can avoid an additional full scan on connection
request if the information is provided to them (user space tools like
wpa_supplicant already has that information available based on earlier
scans).
In addition, this can be used to get more expected behavior for cases
where a specific BSS should be picked first based on operations like
Interworking network selection or WPS. These cases were already easily
addressed with drivers that leave BSS selection to user space, but there
was no convenient way to do this with drivers that take care of BSS
selection internally without using the NL80211_ATTR_MAC which is not
really desired since it is needed for other purposes to force the
association to remain with the same BSS.
Signed-off-by: Jouni Malinen <j@w1.fi>
[add const, fix policy]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
A beacon should never have a Channel Switch Announcement information
element with a count of 0, because a count of 1 means switch just
before the next beacon. So, if a count of 0 was valid in a beacon, it
would have been transmitted in the next channel already, which is
useless. A CSA count equal to zero is only meaningful in action
frames or probe_responses.
Fix the ieee80211_csa_is_complete() and ieee80211_update_csa()
functions accordingly.
With a CSA count of 0, we won't transmit any CSA beacons, because the
switch will happen before the next TBTT. To avoid extra work and
potential confusion in the drivers, complete the CSA immediately,
instead of waiting for the driver to call ieee80211_csa_finish().
To keep things simpler, we also switch immediately when the CSA count
is 1, while in theory we should delay the switch until just before the
next TBTT.
Additionally, move the ieee80211_csa_finish() function to cfg.c,
where it makes more sense.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The return value of ieee80211_mesh_csa_beacon is not aligned with the
return value of ieee80211_assign_beacon() and
ieee80211_ibss_csa_beacon(). For consistency and to be able to use
both functions with similar code, change ieee80211_mesh_csa_beacon()
not to send the bss changed notification itself, but return what has
changed so the caller can send the notification instead.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Refactor ieee80211_mesh_process_chanswitch() to use
ieee80211_channel_switch() and avoid code duplication.
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Pull UML changes from Richard Weinberger:
"This time only various cleanups and housekeeping patches"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: hostfs: make functions static
um: Include generic barrier.h
um: Removed unused attributes from thread_struct
Core:
- Avoid get_cd() on cards marked nonremovable.
Drivers:
- arasan: New driver for controllers found in e.g. Xilinx Zynq SoC.
- dwmmc: Support Hisilicon K3 SoC controllers.
- esdhc-imx: Support for HS200 mode, DDR modes on MX6, runtime PM.
- sdhci-pci: Support O2Micro/BayHubTech controllers used in laptops
like Lenovo ThinkPad W540, Dell Latitude E5440, Dell Latitude E6540.
- tegra: Support Tegra124 SoCs.
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Merge tag 'mmc-updates-for-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC updates from Chris Ball:
"MMC highlights for 3.14:
Core:
- Avoid get_cd() on cards marked nonremovable
Drivers:
- arasan: New driver for controllers found in e.g. Xilinx Zynq SoC
- dwmmc: Support Hisilicon K3 SoC controllers
- esdhc-imx: Support for HS200 mode, DDR modes on MX6, runtime PM
- sdhci-pci: Support O2Micro/BayHubTech controllers used in laptops
like Lenovo ThinkPad W540, Dell Latitude E5440, Dell Latitude E6540
- tegra: Support Tegra124 SoCs"
* tag 'mmc-updates-for-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (55 commits)
mmc: sdhci-pci: Fix possibility of chip->fixes being null
mmc: sdhci-pci: Fix BYT sd card getting stuck in runtime suspend
mmc: sdhci: Allow for long command timeouts
mmc: sdio: add a quirk for broken SDIO_CCCR_INTx polling
mmc: sdhci: fix lockdep error in tuning routine
mmc: dw_mmc: k3: remove clk_table
mmc: dw_mmc: fix dw_mci_get_cd
mmc: dw_mmc: fix sparse non static symbol warning
mmc: sdhci-esdhc-imx: fix warning during module remove function
mmc: sdhci-esdhc-imx: fix access hardirq-unsafe lock in atomic context
mmc: core: sd: implement proper support for sd3.0 au sizes
mmc: atmel-mci: add vmmc-supply support
mmc: sdhci-pci: add broken HS200 quirk for Intel Merrifield
mmc: sdhci: add quirk for broken HS200 support
mmc: arasan: Add driver for Arasan SDHCI
mmc: dw_mmc: add dw_mmc-k3 for k3 platform
mmc: dw_mmc: use slot-gpio to handle cd pin
mmc: sdhci-pci: add support of O2Micro/BayHubTech SD hosts
mmc: sdhci-pci: break out definitions to header file
mmc: tmio: fixup compile error
...
Conflicts:
MAINTAINERS
Included are a new cache model for support of mmap,
and several cleanups across the filesystem and networking
portions of the code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Merge tag 'for-3.14-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
Pull 9p changes from Eric Van Hensbergen:
"Included are a new cache model for support of mmap, and several
cleanups across the filesystem and networking portions of the code"
* tag 'for-3.14-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9p: update documentation
9P: introduction of a new cache=mmap model.
net/9p: remove virtio default hack and set appropriate bits instead
9p: remove useless 'name' variable and assignment
9p: fix return value in case in v9fs_fid_xattr_set()
9p: remove useless variable and assignment
9p: remove useless assignment
9p: remove unused 'super_block' struct pointer
9p: remove never used return variable
9p: remove unused 'p9_fid' struct pointer
9p: remove unused 'p9_client' struct pointer
The hostfs_*() callback functions are all only used within
hostfs_kern.c, so make them static.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: Richard Weinberger <richard@nod.at>
Merge ipmi fixes from Corey Minyard:
"Just some collected fixes for 3.14. Nothing huge"
* emailed patches from Corey Minyard <minyard@acm.org>:
ipmi: Cleanup error return
ipmi: fix timeout calculation when bmc is disconnected
ipmi: use USEC_PER_SEC instead of 1000000 for more meaningful
ipmi: remove deprecated IRQF_DISABLED
Return proper errors for a lot of IPMI failure cases. Also call
pci_disable_device when IPMI PCI devices are removed.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Loading ipmi_si module while bmc is disconnected, we found the timeout
is longer than 5 secs. Actually it takes about 3 mins and 20
secs.(HZ=250)
error message as below:
Dec 12 19:08:59 linux kernel: IPMI BT: timeout in RD_WAIT [ ] 1 retries left
Dec 12 19:08:59 linux kernel: BT: write 4 bytes seq=0x01 03 18 00 01
[...]
Dec 12 19:12:19 linux kernel: IPMI BT: timeout in RD_WAIT [ ]
Dec 12 19:12:19 linux kernel: failed 2 retries, sending error response
Dec 12 19:12:19 linux kernel: IPMI: BT reset (takes 5 secs)
Dec 12 19:12:19 linux kernel: IPMI BT: flag reset [ ]
Function wait_for_msg_done() use schedule_timeout_uninterruptible(1) to
sleep 1 tick, so we should subtract jiffies_to_usecs(1) instead of 100
usecs from timeout.
Reported-by: Hu Shiyuan <hushiyuan@huawei.com>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use USEC_PER_SEC instead of 1000000, that making the later bugfix
more clearly.
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch proposes to remove the use of the IRQF_DISABLED flag
It's a NOOP since 2.6.35 and it will be removed one day.
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Simon Wunderlich
Johannes Berg
Luciano Coelho
Michal Kazior
Karl Beldan
Andrei Otcheretianski
Eyal Shapira
Ilan Peer
Chun-Yeow Yeoh
andrea merello
Ard Biesheuvel
Janusz Dziedzic
Jouni Malinen
Linus Torvalds
James Hogan
Richard Weinberger
Corey Minyard
Xie XiuQi
Michael Opdenacker