In multiple BSSID, we have nested IEs inside the multiple
BSSID IE, that override the external ones for that specific
BSS. As preparation for supporting that, pass 2 BSSIDs to the
parse function, the transmitter, and the selected BSSID, so
it can know which IEs to choose. If the selected BSSID is
NULL, the outer ones will be applied.

Change ieee80211_bss_info_update to parse elements itself,
instead of receiving them parsed, so we have the relevant
bss entry in hand.
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instead of open-coding the element walk, use the new macro.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Similar to WMM IE, if MU_EDCA IE parameters changed (or ceased to exist)
tell the Driver about it.
Signed-off-by: NShaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The iTXQs stop/wake queue mechanism involves a whole bunch
of locks and this is probably why the call to
ieee80211_wake_txqs is deferred to a tasklet when called from
__ieee80211_wake_queue.

Another advantage of that is that ieee80211_wake_txqs might
call the wake_tx_queue() callback and then the driver may
call mac80211 which will call it back in the same context.

The bug I saw is that when we send a deauth frame as a
station we do:

flush(drop=1)
tx deauth
flush(drop=0)

While we flush we stop the queues and wake them up
immediately after we finished flushing. The problem here is
that the tasklet that de-facto enables the queue may not have
run until we send the deauth. Then the deauth frame is sent
to the driver (which is surprising by itself), but the driver
won't get anything useful from ieee80211_tx_dequeue because
the queue is stopped (or more precisely because
vif->txqs_stopped[0] is true).
Then the deauth is not sent. Later on, the tasklet will run,
but that'll be too late. We'll already have removed all the
vif etc...

Fix this by calling ieee80211_wake_txqs synchronously if we
are not waking up the queues from the driver (we check the
reason to determine that). This makes the code really
convoluted because we may call ieee80211_wake_txqs from
__ieee80211_wake_queue. The latter assumes that
queue_stop_reason_lock has been taken by the caller and
ieee80211_wake_txqs may release the lock to send the frames.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

New bss param ftm_responder is used to notify the driver to
enable fine timing request (FTM) responder role in AP mode.

Plumb the new cfg80211 API for FTM responder statistics through to
the driver API in mac80211.
Signed-off-by: NDavid Spinadel <david.spinadel@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NPradeep Kumar Chitrapu <pradeepc@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Drivers that do not have the BUFF_MMPDU_TXQ flag set will not have a
TXQ for the special TID = 16.

In this case, the last member in the *struct ieee80211_sta* txq array
will be NULL.

We must check this in order not to get a NULL pointer dereference when
iterating the txq array.
Signed-off-by: NErik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

With newer VHT implementations, it's necessary to look at the
HT operation's CCFS2 field to identify the actual bandwidth
used.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In commit 9236c4523e5b ("mac80211: limit wmm params to comply
with ETSI requirements"), we have limited the WMM parameters to
comply with 802.11 and ETSI standard.  Mistakenly the TXOP value
was caluclated wrong.  Fix it by taking the minimum between
802.11 to ETSI to make sure we are not violating both.

Fixes: e552af05 ("mac80211: limit wmm params to comply with ETSI requirements")
Signed-off-by: NHaim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Sometimes, it is required to stop the transmissions momentarily and
resume it later; stopping the txqs becomes very critical in scenarios where
the packet transmission has to be ceased completely. For example, during
the hardware restart, during off channel operations,
when initiating CSA(upon detecting a radar on the DFS channel), etc.

The TX queue stop/start logic in mac80211 works well in stopping the TX
when drivers make use of netdev queues, i.e, when Qdiscs in network layer
take care of traffic scheduling. Since the devices implementing
wake_tx_queue can run without Qdiscs, packets will be handed to mac80211
directly without queueing them in the netdev queues.

Also, mac80211 does not invoke any of the
netif_stop_*/netif_wake_* APIs if wake_tx_queue is implemented.
Since the queues are not stopped in this case, transmissions can continue
and this will impact negatively on the operation of the wireless device.

For example,
During hardware restart, we stop the netdev queues so that packets are
not sent to the driver. Since ath10k implements wake_tx_queue,
TX queues will not be stopped and packets might reach the hardware while
it is restarting; this can make hardware unresponsive and the only
possible option for recovery is to reboot the entire system.

There is another problem to this, it is observed that the packets
were sent on the DFS channel for a prolonged duration after radar
detection impacting the channel closing time.

We can still invoke netif stop/wake APIs when wake_tx_queue is implemented
but this could lead to packet drops in network layer; adding stop/start
logic for software TXQs in mac80211 instead makes more sense; the change
proposed adds the same in mac80211.
Signed-off-by: NManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Make wmm_rule be part of the reg_rule structure. This simplifies the
code a lot at the cost of having bigger memory usage. However in most
cases we have only few reg_rule's and when we do have many like in
iwlwifi we do not save memory as it allocates a separate wmm_rule for
each channel anyway.

This also fixes a bug reported in various places where somewhere the
pointers were corrupted and we ended up doing a null-dereference.

Fixes: 230ebaa1 ("cfg80211: read wmm rules from regulatory database")
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
[rephrase commit message slightly]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

As part of hw reconfig, only stations linked to AP interfaces are added
back to the driver ignoring those which are tied to AP_VLAN interfaces.

It is true that there could be stations tied to the AP_VLAN interface while
serving 4addr clients or when using AP_VLAN for VLAN operations; we should
be adding these stations back to the driver as part of hw reconfig, failing
to do so can cause functional issues.

In the case of ath10k driver, the following errors were observed.

ath10k_pci : failed to install key for non-existent peer XX:XX:XX:XX:XX:XX
Workqueue: events_freezable ieee80211_restart_work [mac80211]
(unwind_backtrace) from (show_stack+0x10/0x14)
(show_stack) (dump_stack+0x80/0xa0)
(dump_stack) (warn_slowpath_common+0x68/0x8c)
(warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
(warn_slowpath_null) (ieee80211_enable_keys+0x88/0x154 [mac80211])
(ieee80211_enable_keys) (ieee80211_reconfig+0xc90/0x19c8 [mac80211])
(ieee80211_reconfig]) (ieee80211_restart_work+0x8c/0xa0 [mac80211])
(ieee80211_restart_work) (process_one_work+0x284/0x488)
(process_one_work) (worker_thread+0x228/0x360)
(worker_thread) (kthread+0xd8/0xec)
(kthread) (ret_from_fork+0x14/0x24)

Also while bringing down the AP VAP, WARN_ONs and errors related to peer
removal were observed.

ath10k_pci : failed to clear all peer wep keys for vdev 0: -2
ath10k_pci : failed to disassociate station: 8c:fd:f0:0a:8c:f5 vdev 0: -2
(unwind_backtrace) (show_stack+0x10/0x14)
(show_stack) (dump_stack+0x80/0xa0)
(dump_stack) (warn_slowpath_common+0x68/0x8c)
(warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
(warn_slowpath_null) (sta_set_sinfo+0xb98/0xc9c [mac80211])
(sta_set_sinfo [mac80211]) (__sta_info_flush+0xf0/0x134 [mac80211])
(__sta_info_flush [mac80211]) (ieee80211_stop_ap+0xe8/0x390 [mac80211])
(ieee80211_stop_ap [mac80211]) (__cfg80211_stop_ap+0xe0/0x3dc [cfg80211])
(__cfg80211_stop_ap [cfg80211]) (cfg80211_stop_ap+0x30/0x44 [cfg80211])
(cfg80211_stop_ap [cfg80211]) (genl_rcv_msg+0x274/0x30c)
(genl_rcv_msg) (netlink_rcv_skb+0x58/0xac)
(netlink_rcv_skb) (genl_rcv+0x20/0x34)
(genl_rcv) (netlink_unicast+0x11c/0x204)
(netlink_unicast) (netlink_sendmsg+0x30c/0x370)
(netlink_sendmsg) (sock_sendmsg+0x70/0x84)
(sock_sendmsg) (___sys_sendmsg.part.3+0x188/0x228)
(___sys_sendmsg.part.3) (__sys_sendmsg+0x4c/0x70)
(__sys_sendmsg) (ret_fast_syscall+0x0/0x44)

These issues got fixed by adding the stations which are
tied to AP_VLANs back to the driver.
Signed-off-by: NManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add support for HE in mac80211 conforming with P802.11ax_D1.4.

Johannes: Fix another bug with the buf_size comparison in agg-rx.c.
Signed-off-by: NLiad Kaufman <liad.kaufman@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NIdo Yariv <idox.yariv@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Support the new random SN and minimal probe request contents
scan flags for the case of software scan - for hardware scan
the drivers need to opt in, but may need to do only that,
depending on their implementation.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>

This function is passed many more parameters in the scan case
than in the MLME case, and differentiates the two cases inside.
Split it up and make both versions static to simplify things.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>

Add flags to pass through to probe request building and
change the "bool directed" to be one of them.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>

The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)
Signed-off-by: NKees Cook <keescook@chromium.org>

There's no need to do the same thing three times in
the different switch cases, pull that out to a single
place.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

ETSI has recently added new requirements that restrict the WMM
parameter values for 5GHz frequencies.  We need to take care of the
following scenarios in order to comply with these new requirements:

1. When using mac80211 default values;
2. When the userspace tries to configure its own values;
3. When associating to an AP which advertises WWM IE.

When associating to an AP, the client uses the values in the
advertised WMM IE.  But the AP may not comply with the new ETSI
requirements, so the client needs to check the current regulatory
rules and use those limits accordingly.
Signed-off-by: NHaim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

With drivers implementing rate control in driver or firmware
rate_control_send_low() may not get called, and thus the
driver needs to know about changes in the multicast rate.

Add and use a new BSS change flag for this.
Signed-off-by: NPradeep Kumar Chitrapu <pradeepc@codeaurora.org>
[rewrite commit message]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Currently the restart flow enables RX back, and then proceeds
to tear down RX and TX aggregations.
The TX aggregation tear down calls synchronize_net(), which
waits for packet receiving to be done.
This is done for every session, while RX processing is already
active, and in some reproductions it takes up to 3 seconds.
Add a call once in the restart_work, before we have traffic
active again, and remove the subsequent calls when tearing
down the aggregation.
This requires to move down the code that turns off the
reconfig flag in order to be able to test it in
_ieee80211_stop_tx_ba_session().
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This was created using the following spatch:
    @find@
    type S;
    expression M, M2;
    position p;
    @@
    offsetof(S, M) + sizeof(M2)@p

    @script:python@
    m << find.M;
    m2 << find.M2;
    @@
    if not m2.endswith('-> ' + m):
            cocci.include_match(False)

    @change@
    type find.S;
    expression find.M, find.M2;
    position find.p;
    @@
    -offsetof(S, M) + sizeof(M2)@p
    +offsetofend(S, M)
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

There's no need to split off IEs from the ones obtained
from userspace, if they were already split off, so for
example IEs that went before HT don't have to be listed
again to go before VHT. Simplify the code here so it's
clearer.

While at it, also clarify the comments regarding the DMG
(60 GHz) elements.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

VHT MESH support was added, but the order of the IEs
wasn't enforced. Fix that.
Signed-off-by: NLiad Kaufman <liad.kaufman@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.

An spatch similar to the one for skb_put_zero() converts many
of the places using it:

    @@
    identifier p, p2;
    expression len, skb, data;
    type t, t2;
    @@
    (
    -p = skb_put(skb, len);
    +p = skb_put_data(skb, data, len);
    |
    -p = (t)skb_put(skb, len);
    +p = skb_put_data(skb, data, len);
    )
    (
    p2 = (t2)p;
    -memcpy(p2, data, len);
    |
    -memcpy(p, data, len);
    )

    @@
    type t, t2;
    identifier p, p2;
    expression skb, data;
    @@
    t *p;
    ...
    (
    -p = skb_put(skb, sizeof(t));
    +p = skb_put_data(skb, data, sizeof(t));
    |
    -p = (t *)skb_put(skb, sizeof(t));
    +p = skb_put_data(skb, data, sizeof(t));
    )
    (
    p2 = (t2)p;
    -memcpy(p2, data, sizeof(*p));
    |
    -memcpy(p, data, sizeof(*p));
    )

    @@
    expression skb, len, data;
    @@
    -memcpy(skb_put(skb, len), data, len);
    +skb_put_data(skb, data, len);

(again, manually post-processed to retain some comments)
Reviewed-by: NStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There were many places that my previous spatch didn't find,
as pointed out by yuan linyu in various patches.

The following spatch found many more and also removes the
now unnecessary casts:

    @@
    identifier p, p2;
    expression len;
    expression skb;
    type t, t2;
    @@
    (
    -p = skb_put(skb, len);
    +p = skb_put_zero(skb, len);
    |
    -p = (t)skb_put(skb, len);
    +p = skb_put_zero(skb, len);
    )
    ... when != p
    (
    p2 = (t2)p;
    -memset(p2, 0, len);
    |
    -memset(p, 0, len);
    )

    @@
    type t, t2;
    identifier p, p2;
    expression skb;
    @@
    t *p;
    ...
    (
    -p = skb_put(skb, sizeof(t));
    +p = skb_put_zero(skb, sizeof(t));
    |
    -p = (t *)skb_put(skb, sizeof(t));
    +p = skb_put_zero(skb, sizeof(t));
    )
    ... when != p
    (
    p2 = (t2)p;
    -memset(p2, 0, sizeof(*p));
    |
    -memset(p, 0, sizeof(*p));
    )

    @@
    expression skb, len;
    @@
    -memset(skb_put(skb, len), 0, len);
    +skb_put_zero(skb, len);

Apply it to the tree (with one manual fixup to keep the
comment in vxlan.c, which spatch removed.)
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

To support HT and VHT CSA, beacons and action frames must include the
corresponding IEs.
Signed-off-by: NSimon Wunderlich <sw@simonwunderlich.de>
[make ieee80211_ie_build_wide_bw_cs() return void]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Have proper request id filled in the SCHED_SCAN_RESULTS and
SCHED_SCAN_STOPPED notifications toward user-space by having the
driver provide it through the api.
Reviewed-by: NHante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: NPieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: NFranky Lin <franky.lin@broadcom.com>
Signed-off-by: NArend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Parse the BSS max idle period element and set the BSS configuration
accordingly so the driver can use this information to configure the
max idle period and to use protected management frames for keep alive
when required.

The BSS max idle period element is defined in IEEE802.11-2016,
section 9.4.2.79
Signed-off-by: NAvraham Stern <avraham.stern@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Existing API 'ieee80211_get_sdata_band' returns default 2 GHz band even
if the channel context configuration is NULL. This crashes for chipsets
which support 5 Ghz alone when it tries to access members of 'sband'.
Channel context configuration can be NULL in multivif case and when
channel switch is in progress (or) when it fails. Fix this by replacing
the API 'ieee80211_get_sdata_band' with  'ieee80211_get_sband' which
returns a NULL pointer for sband when the channel configuration is NULL.

An example scenario is as below:

In multivif mode (AP + STA) with drivers like ath10k, when we do a
channel switch in the AP vif (which has a number of clients connected)
and a STA vif which is connected to some other AP, when the channel
switch in AP vif fails, while the STA vifs tries to connect to the
other AP, there is a window where the channel context is NULL/invalid
and this results in a crash  while the clients connected to the AP vif
tries to reconnect and this race is very similar to the one investigated
by Michal in https://patchwork.kernel.org/patch/3788161/ and this does
happens with hardware that supports 5Ghz alone after long hours of
testing with continuous channel switch on the AP vif

ieee80211 phy0: channel context reservation cannot be finalized because
some interfaces aren't switching
wlan0: failed to finalize CSA, disconnecting
wlan0-1: deauthenticating from 8c:fd:f0:01:54:9c by local choice
	(Reason: 3=DEAUTH_LEAVING)

	WARNING: CPU: 1 PID: 19032 at net/mac80211/ieee80211_i.h:1013 sta_info_alloc+0x374/0x3fc [mac80211]
	[<bf77272c>] (sta_info_alloc [mac80211])
	[<bf78776c>] (ieee80211_add_station [mac80211]))
	[<bf73cc50>] (nl80211_new_station [cfg80211])

	Unable to handle kernel NULL pointer dereference at virtual
	address 00000014
	pgd = d5f4c000
	Internal error: Oops: 17 [#1] PREEMPT SMP ARM
	PC is at sta_info_alloc+0x380/0x3fc [mac80211]
	LR is at sta_info_alloc+0x37c/0x3fc [mac80211]
	[<bf772738>] (sta_info_alloc [mac80211])
	[<bf78776c>] (ieee80211_add_station [mac80211])
	[<bf73cc50>] (nl80211_new_station [cfg80211]))

Cc: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: NMohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This field will need to be used again for HE, so rename it now.

Again, mostly done with this spatch:

@@
expression status;
@@
-status->vht_nss
+status->nss
@@
expression status;
@@
-status.vht_nss
+status.nss
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We currently use a lot of flags that are mutually incompatible,
separate this out into actual encoding and bandwidth enum values.

Much of this again done with spatch, with manual post-editing,
mostly to add the switch statements and get rid of the conversions.

@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_80MHZ
+status->bw = RATE_INFO_BW_80
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_40MHZ
+status->bw = RATE_INFO_BW_40
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_20MHZ
+status->bw = RATE_INFO_BW_20
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_160MHZ
+status->bw = RATE_INFO_BW_160
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_5MHZ
+status->bw = RATE_INFO_BW_5
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_10MHZ
+status->bw = RATE_INFO_BW_10

@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_VHT
+status->encoding = RX_ENC_VHT
@@
expression status;
@@
-status->enc_flags |= RX_ENC_FLAG_HT
+status->encoding = RX_ENC_HT
@@
expression status;
@@
-status.enc_flags |= RX_ENC_FLAG_VHT
+status.encoding = RX_ENC_VHT
@@
expression status;
@@
-status.enc_flags |= RX_ENC_FLAG_HT
+status.encoding = RX_ENC_HT

@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_HT)
+(status->encoding == RX_ENC_HT)
@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_VHT)
+(status->encoding == RX_ENC_VHT)

@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_5MHZ)
+(status->bw == RATE_INFO_BW_5)
@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_10MHZ)
+(status->bw == RATE_INFO_BW_10)
@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_40MHZ)
+(status->bw == RATE_INFO_BW_40)
@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_80MHZ)
+(status->bw == RATE_INFO_BW_80)
@@
expression status;
@@
-(status->enc_flags & RX_ENC_FLAG_160MHZ)
+(status->bw == RATE_INFO_BW_160)
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In preparation for adding support for HE rates, clean up
the driver report encoding for rate/bandwidth reporting
on RX frames.

Much of this patch was done with the following spatch:

@@
expression status;
@@
-status->flag & (RX_FLAG_HT | RX_FLAG_VHT)
+status->enc_flags & (RX_ENC_FLAG_HT | RX_ENC_FLAG_VHT)

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_SHORTPRE
+status->enc_flags op RX_ENC_FLAG_SHORTPRE
@@
expression status;
@@
-status->flag & RX_FLAG_SHORTPRE
+status->enc_flags & RX_ENC_FLAG_SHORTPRE

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_HT
+status->enc_flags op RX_ENC_FLAG_HT
@@
expression status;
@@
-status->flag & RX_FLAG_HT
+status->enc_flags & RX_ENC_FLAG_HT

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_40MHZ
+status->enc_flags op RX_ENC_FLAG_40MHZ
@@
expression status;
@@
-status->flag & RX_FLAG_40MHZ
+status->enc_flags & RX_ENC_FLAG_40MHZ

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_SHORT_GI
+status->enc_flags op RX_ENC_FLAG_SHORT_GI
@@
expression status;
@@
-status->flag & RX_FLAG_SHORT_GI
+status->enc_flags & RX_ENC_FLAG_SHORT_GI

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_HT_GF
+status->enc_flags op RX_ENC_FLAG_HT_GF
@@
expression status;
@@
-status->flag & RX_FLAG_HT_GF
+status->enc_flags & RX_ENC_FLAG_HT_GF

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_VHT
+status->enc_flags op RX_ENC_FLAG_VHT
@@
expression status;
@@
-status->flag & RX_FLAG_VHT
+status->enc_flags & RX_ENC_FLAG_VHT

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_STBC_MASK
+status->enc_flags op RX_ENC_FLAG_STBC_MASK
@@
expression status;
@@
-status->flag & RX_FLAG_STBC_MASK
+status->enc_flags & RX_ENC_FLAG_STBC_MASK

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_LDPC
+status->enc_flags op RX_ENC_FLAG_LDPC
@@
expression status;
@@
-status->flag & RX_FLAG_LDPC
+status->enc_flags & RX_ENC_FLAG_LDPC

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_10MHZ
+status->enc_flags op RX_ENC_FLAG_10MHZ
@@
expression status;
@@
-status->flag & RX_FLAG_10MHZ
+status->enc_flags & RX_ENC_FLAG_10MHZ

@@
assignment operator op;
expression status;
@@
-status->flag op RX_FLAG_5MHZ
+status->enc_flags op RX_ENC_FLAG_5MHZ
@@
expression status;
@@
-status->flag & RX_FLAG_5MHZ
+status->enc_flags & RX_ENC_FLAG_5MHZ

@@
assignment operator op;
expression status;
@@
-status->vht_flag op RX_VHT_FLAG_80MHZ
+status->enc_flags op RX_ENC_FLAG_80MHZ
@@
expression status;
@@
-status->vht_flag & RX_VHT_FLAG_80MHZ
+status->enc_flags & RX_ENC_FLAG_80MHZ

@@
assignment operator op;
expression status;
@@
-status->vht_flag op RX_VHT_FLAG_160MHZ
+status->enc_flags op RX_ENC_FLAG_160MHZ
@@
expression status;
@@
-status->vht_flag & RX_VHT_FLAG_160MHZ
+status->enc_flags & RX_ENC_FLAG_160MHZ

@@
assignment operator op;
expression status;
@@
-status->vht_flag op RX_VHT_FLAG_BF
+status->enc_flags op RX_ENC_FLAG_BF
@@
expression status;
@@
-status->vht_flag & RX_VHT_FLAG_BF
+status->enc_flags & RX_ENC_FLAG_BF

@@
assignment operator op;
expression status, STBC;
@@
-status->flag op STBC << RX_FLAG_STBC_SHIFT
+status->enc_flags op STBC << RX_ENC_FLAG_STBC_SHIFT

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_SHORTPRE
+status.enc_flags op RX_ENC_FLAG_SHORTPRE
@@
expression status;
@@
-status.flag & RX_FLAG_SHORTPRE
+status.enc_flags & RX_ENC_FLAG_SHORTPRE

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_HT
+status.enc_flags op RX_ENC_FLAG_HT
@@
expression status;
@@
-status.flag & RX_FLAG_HT
+status.enc_flags & RX_ENC_FLAG_HT

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_40MHZ
+status.enc_flags op RX_ENC_FLAG_40MHZ
@@
expression status;
@@
-status.flag & RX_FLAG_40MHZ
+status.enc_flags & RX_ENC_FLAG_40MHZ

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_SHORT_GI
+status.enc_flags op RX_ENC_FLAG_SHORT_GI
@@
expression status;
@@
-status.flag & RX_FLAG_SHORT_GI
+status.enc_flags & RX_ENC_FLAG_SHORT_GI

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_HT_GF
+status.enc_flags op RX_ENC_FLAG_HT_GF
@@
expression status;
@@
-status.flag & RX_FLAG_HT_GF
+status.enc_flags & RX_ENC_FLAG_HT_GF

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_VHT
+status.enc_flags op RX_ENC_FLAG_VHT
@@
expression status;
@@
-status.flag & RX_FLAG_VHT
+status.enc_flags & RX_ENC_FLAG_VHT

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_STBC_MASK
+status.enc_flags op RX_ENC_FLAG_STBC_MASK
@@
expression status;
@@
-status.flag & RX_FLAG_STBC_MASK
+status.enc_flags & RX_ENC_FLAG_STBC_MASK

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_LDPC
+status.enc_flags op RX_ENC_FLAG_LDPC
@@
expression status;
@@
-status.flag & RX_FLAG_LDPC
+status.enc_flags & RX_ENC_FLAG_LDPC

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_10MHZ
+status.enc_flags op RX_ENC_FLAG_10MHZ
@@
expression status;
@@
-status.flag & RX_FLAG_10MHZ
+status.enc_flags & RX_ENC_FLAG_10MHZ

@@
assignment operator op;
expression status;
@@
-status.flag op RX_FLAG_5MHZ
+status.enc_flags op RX_ENC_FLAG_5MHZ
@@
expression status;
@@
-status.flag & RX_FLAG_5MHZ
+status.enc_flags & RX_ENC_FLAG_5MHZ

@@
assignment operator op;
expression status;
@@
-status.vht_flag op RX_VHT_FLAG_80MHZ
+status.enc_flags op RX_ENC_FLAG_80MHZ
@@
expression status;
@@
-status.vht_flag & RX_VHT_FLAG_80MHZ
+status.enc_flags & RX_ENC_FLAG_80MHZ

@@
assignment operator op;
expression status;
@@
-status.vht_flag op RX_VHT_FLAG_160MHZ
+status.enc_flags op RX_ENC_FLAG_160MHZ
@@
expression status;
@@
-status.vht_flag & RX_VHT_FLAG_160MHZ
+status.enc_flags & RX_ENC_FLAG_160MHZ

@@
assignment operator op;
expression status;
@@
-status.vht_flag op RX_VHT_FLAG_BF
+status.enc_flags op RX_ENC_FLAG_BF
@@
expression status;
@@
-status.vht_flag & RX_VHT_FLAG_BF
+status.enc_flags & RX_ENC_FLAG_BF

@@
assignment operator op;
expression status, STBC;
@@
-status.flag op STBC << RX_FLAG_STBC_SHIFT
+status.enc_flags op STBC << RX_ENC_FLAG_STBC_SHIFT

@@
@@
-RX_FLAG_STBC_SHIFT
+RX_ENC_FLAG_STBC_SHIFT
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

At least on iwlwifi, sometimes lockdep complains that we can
lock
 chanctx_mtx -> mvm.mutex -> iflist_mtx
 (due to iterate_interfaces)
and
 iflist_mtx -> chanctx_mtx

Remove the latter dependency in mac80211 by using the RTNL
that we already hold in one case, and can relatively easily
achieve in the other case.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This matches the spec, and otherwise things are really
confusing with the next patch adding CCFS2.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

As part of interface combination checking, verify any new
interface's beacon intervals. In fact, just always add the
beacon interval since that's harmless.

With this patch, mac80211 is prepared for drivers that set
the min_beacon_int_gcd parameter in interface combinations.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The uapsd_queue field is in QoS IE order and not in
IEEE80211_AC_*'s order.
This means that mac80211 would get confused between
BK and BE which is certainly not such a big deal but
needs to be fixed.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Move the growing parameter list to a structure for the interface
combination check and iteration functions in cfg80211 and mac80211
to make the code easier to understand.
Signed-off-by: NPurushottam Kushwaha <pkushwah@qti.qualcomm.com>
[edit commit message]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The TXQ intermediate queues can cause packet reordering when more than
one flow is active to a single station. Since some of the wifi-specific
packet handling (notably sequence number and encryption handling) is
sensitive to re-ordering, things break if they are applied before the
TXQ.

This splits up the TX handlers and fast_xmit logic into two parts: An
early part and a late part. The former is applied before TXQ enqueue,
and the latter after dequeue. The non-TXQ path just applies both parts
at once.

Because fragments shouldn't be split up or reordered, the fragmentation
handler is run after dequeue. Any fragments are then kept in the TXQ and
on subsequent dequeues they take precedence over dequeueing from the FQ
structure.

This approach avoids having to scatter special cases all over the place
for when TXQ is enabled, at the cost of making the fast_xmit and TX
handler code slightly more complex.
Signed-off-by: NToke Høiland-Jørgensen <toke@toke.dk>
[fix a few code-style nits, make ieee80211_xmit_fast_finish void,
 remove a useless txq->sta check]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Implement add/rm_nan_func functions and handle NAN function
termination notifications. Handle instance_id allocation for
NAN functions and implement the reconfig flow.
Signed-off-by: NAndrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This code doesn't do much besides allowing to start and
stop the vif.
Signed-off-by: NAndrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NAyala Beker <ayala.beker@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>