Commit Graph

1325 Commits

Author SHA1 Message Date
Adrian Chadd
f7d38a13a8 [net80211] Add new privileges; restrict what can be done in a jail.
Split the MANAGE privilege into MANAGE, SETMAC and CREATE_VAP.

+ VAP_MANAGE is everything but setting the MAC and creating a VAP.
+ VAP_SETMAC is setting the MAC address of the VAP.
  Typically you wouldn't want the jail to be able to modify this.
+ CREATE_VAP is to create a new VAP. Again, you don't want to be doing
  this in a jail, but this DOES stop being able to run some corner
  cases like Dynamic WDS (DWDS) AP in a jail/vnet. We can figure this
  bit out later.

This allows me to run wpa_supplicant in a jail after transferring
a STA VAP into it. I unfortunately can't currently set the wlan
debugging inside the jail; that would be super useful!

Reviewed by:	bz
Differential Revision:	https://reviews.freebsd.org/D25630
2020-07-19 15:16:27 +00:00
Adrian Chadd
39ca7ca568 [net80211] Commit files missing in the previous commit
These belong to my previous commit, but apparently I typed ieee80211_vhf.[ch]
and forgot ht.h.  Le oops.
2020-07-01 00:24:55 +00:00
Adrian Chadd
f1481c8d3b [net80211] Migrate HT/legacy protection mode and preamble calculation to per-VAP flags
The later firmware devices (including iwn!) support multiple configuration
contexts for a lot of things, leaving it up to the firmware to decide
which channel and vap is active.  This allows for things like off-channel
p2p sta/ap operation and other weird things.

However, net80211 is still focused on a "net80211 drives all" when it comes to driving
the NIC, and as part of this history a lot of these options are global and not per-VAP.
This is fine when net80211 drives things and all VAPs share a single channel - these
parameters importantly really reflect the state of the channel! - but it will increasingly
be not fine when we start supporting more weird configurations and more recent NICs.
Yeah, recent like iwn/iwm.

Anyway - so, migrate all of the HT protection, legacy protection and preamble
stuff to be per-VAP.  The global flags are still there; they're now calculated
in a deferred taskqueue that mirrors the old behaviour.  Firmware based drivers
which have per-VAP configuration of these parameters can now just listen to the
per-VAP options.

What do I mean by per-channel? Well, the above configuration parameters really
are about interoperation with other devices on the same channel. Eg, HT protection
mode will flip to legacy/mixed if it hears ANY BSS that supports non-HT stations or
indicates it has non-HT stations associated.  So, these flags really should be
per-channel rather than per-VAP, and then for things like "do i need short preamble
or long preamble?" turn into a "do I need it for this current operating channel".
Then any VAP using it can query the channel that it's on, reflecting the real
required state.

This patch does none of the above paragraph just yet.

I'm also cheating a bit - I'm currently not using separate taskqueues for
the beacon updates and the per-VAP configuration updates.  I can always further
split it later if I need to but I didn't think it was SUPER important here.

So:

* Create vap taskqueue entries for ERP/protection, HT protection and short/long
  preamble;
* Migrate the HT station count, short/long slot station count, etc - into per-VAP
  variables rather than global;
* Fix a bug with my WME work from a while ago which made it per-VAP - do the WME
  beacon update /after/ the WME update taskqueue runs, not before;
* Any time the HT protmode configuration changes or the ERP protection mode
  config changes - schedule the task, which will call the driver without the
  net80211 lock held and all correctly serialised;
* Use the global flags for beacon IEs and VAP flags for probe responses and
  other IE situations.

The primary consumer of this is ath10k.  iwn could use it when sending RXON,
but we don't support IBSS or AP modes on it yet, and I'm not yet sure whether
it's required in STA mode (ie whether the firmware parses beacons to change
protection mode or whether we need to.)

Tested:

* AR9280, STA/AP
* AR9380, DWDS STA+STA/AP
* ath10k work, STA/AP
* Intel 6235, STA
* Various rtwn / run NICs, DWDS STA and STA configurations
2020-07-01 00:23:49 +00:00
Adrian Chadd
bac852bbac [net80211] Add missing commit to previous-1 uapsd commit.
Whoops; somehow my big commit line didn't include this..  cue the tree breakage emails.
2020-06-16 00:28:45 +00:00
Adrian Chadd
8379e8db7a [net80211] Add initial U-APSD negotiation support.
U-APSD (unscheduled automatic power save delivery) is a power save method
that's a bit better than legacy PS-POLL - stations can mark frames with
an extra flag that tells the AP to leak out more frames after it sends
its own frames rather than needing to send a PS-POLL to get another frame
from the AP.

Now, this code just handles the negotiation bits; it doesn't actually
implement U-APSD.  That's up to drivers, and nothing in the tree yet
implements this.  I /may/ implement this for ath(4) if I eventually care
enough but right now I plan on just implementing it for firmware offload
based NICs that handle this in the NIC.

I'll commit the ifconfig bit after this and I may have some follow-up
commits as this gets used more by me in local testing.

This should be a glorious no-op for everyone else.  If things change
for anyone that isn't fixed by a complete recompile then please reach out
to me.
2020-06-16 00:27:32 +00:00
Adrian Chadd
e9efad4f9e [net80211] Treat frames without an rx status as not a decap'ed A-MSDU.
Drivers for NICs which do A-MSDU decap in hardware / driver will need to
set the rx status, so if it's missing then treat it as not a decap'ed
A-MSDU.
2020-06-14 00:23:06 +00:00
Adrian Chadd
1209ded2e1 [net80211] Also convert the ddb path
Whoops - this belonged in my previous commit.
2020-06-14 00:21:48 +00:00
Adrian Chadd
e81d909274 [net80211] Handle offloaded AMSDU in AMPDU reordering.
In the 11n world, most NICs did A-MPDU receive/transmit offloading but
not A-MSDU offloading.  So, the net80211 A-MPDU receive path would just
receive MPDUs, do the reordering bit, pass it up to the rest of
net80211 for crypto decap and then do A-MSDU decap before throwing ethernet
frames up to the rest of the system.

However 11ac and 11ax NICs are increasingly doing A-MSDU offload (and
newer 11ax stuff does socket offload, but hey I don't want to scare people
JUST yet) - so although A-MPDU reordering may be done in the OS, A-MSDUs
look like a normal MPDU.  This means that all the MSDUs are actually
faked into a set of MPDUs with matching 802.11 header - the sequence number,
QoS header and any encryption verification bits (like IV) are just copied.

This shows up as MASSIVE packet loss in net80211, cause after the first MPDU
we just toss the rest.

(And don't get me started about ethernet decap with A-MPDU host reordering;
we'll have to cross that bridge for later 11ac and 11ax bits too.)

Anyway, this work changes each A-MPDU reorder slot into an mbufq.
The mbufq is treated as a whole set of frames to pass up to the stack
and reordered/de-duped as a group.  The last frame in the reorder list
is checked to see if it's an A-MSDU final frame so any duplicates are
correctly tossed rather than double-received.  Other than that, the
rest of the logic is unchanged.

The previous commit did a small subset of this - if there wasn't any reordering
going on then it'd accept the A-MSDUs.  This is the rest of the needed work.

This is a no-op for 11n NICs doing A-MPDU reordering but needing software
A-MSDU decap - they aren't tagged as A-MSDU and so any subsequent
frames added to the reorder slot are tossed.

Tested:

* QCA9880 (ath10k/athp) - STA/AP mode;
* RT3593 (if_rsu) - 11n STA+DWDS mode (I'm committing through it rn);
* QCA9380 (if_ath) - STA/AP mode.
2020-06-13 23:35:22 +00:00
Adrian Chadd
ea3d5fd9df [net80211] separate out node allocation and node initialisation.
This is a new, optional (for now!) method that drivers can use to separate
node allocation and node initialisation.  Right now they're the same, and
drivers that need to do node allocation via firmware commands need to sleep
and thus they need to defer node allocation into an internal taskqueue.

Right now they're just separate but not deferred.  Later on if I get the time
we'll start deferring the node and key related operations but that requires
making a bunch of other stuff (notably things that generate frames!) also
async/deferred.

Tested:

* RT3593, STA/DWDS mode
* AR9380, STA/AP modes
* QCA9880 (athp) - STA/AP modes
2020-06-13 22:20:02 +00:00
Conrad Meyer
8bc0d2b855 Fix !DEBUGNET build after r362138
X-MFC-With:	r362138
2020-06-13 03:16:09 +00:00
Conrad Meyer
479ab044c1 net80211: Add framework for debugnet(4) support
Allow net80211 drivers to register a small vtable of debugnet-related
methods.

This is not a functional change.  Driver support is needed, similar to
debugnet(4) for wired NICs.

Reviewed by:	adrian, markj (earlier version both)
Differential Revision:	https://reviews.freebsd.org/D17308
2020-06-13 00:59:36 +00:00
Adrian Chadd
a67acf111f [net80211] First part of A-MSDU offload handling - don't bump A-MPDU reordering seqno
When doing A-MSDU offload handling the driver is required to mark
A-MSDUs from the same MPDU with the same sequence number.
It then tags them as AMSDU (if it's a decap'ed A-MSDU) and AMSDU_MORE
(saying there's more AMSDUs decapped in the same MSDU.)
This allows encryption and sequence number offload to work right.

In the A-MSDU path the sequence number check looks at the A-MSDU flags
in the frame to see whether it's part of the same seqno and will pass them
(ie, not increment rx_seq until the last A-MSDU is seen from the driver,
or a new seqno shows up.0

However, I did this work in the A-MSDU path but not the A-MSDU in A-MPDU path.
For the non A-MDSU offload case the A-MPDU receive reordering will do its
thing and then pass up the MPDU up for decap - which then will see it's
an A-MSDU and decap each sub-frame.  But this isn't done for offloaded
A-MSDU frames.

This requires two parts:

* Don't bump the RX sequence number, same as above; and
* If frames go into the reordering buffer, they need to be added into the slot
  as a set of frames rather than a single frame, so once a new seqno shows up
  this slot can be marked as "full" and we can move on.

This patch does the first.  The latter requires that I find and commit
work to change rxa_m from an mbuf to an mbufq and the nhandle A-MSDU
there.  But, the first is enough to allow the normal case (ie, no or not
a lot of A-MPDU RX reordering) to work.

This allows the athp driver (QCA9880) throughput to go from VERY low
(like 5mbit TCP, 1/3-1/4 expected UDP throughput) to ~ 250mbit TCP
and > 300mbit UDP on a VHT/40 channel.  TCP sucks because, well, it
shows up as MASSIVE packet loss when all but one frame in a decap'ed
A-MSDU stream is dropped. Le whoops.

Now, where'd I put that laptop with the patch for rxa_m mbufq that
I wrote like in 2017...

Tested:

* AR9380, STA/AP mode (a big no-op, no A-MSDU hardware decap);
* if_run (RT3593), STA DWDS mode (A-MPDU / A-MSDU receive, but again
  no A-MSDU hardware decap);
* QCA9880, STA/AP mode (which is doing hardware A-MPDU/A-MSDU decap,
  but no A-MPDU reordering in the firmware.)
2020-06-12 04:19:03 +00:00
Adrian Chadd
ee424b7351 [net80211] ok ok if_xname won't ever be NULL.
Somewhere in net80211 if_xname is checked against NULL but it doesn't trigger
a compiler warning, but this does.  So DTRT for FreeBSD and the other if_xname
derefences can be converted to this function at a later time.
2020-06-10 18:59:46 +00:00
Adrian Chadd
24a366af3a [net80211] Add a method to return the vap's ifname.
This removes the requirement to know what's in the ifp.

(If someone wants a quick clean-up task, it'd be nice to convert instances
of ifp dereferencing for if_xname over to this method.)
2020-06-07 04:57:48 +00:00
Adrian Chadd
b3d0e274bf [net80211] Flip on A-MPDU, A-MSDU, A-MPDU+A-MSDU and Fast frames options.
This updates the logic to allow:

* A-MPDU if available;
* A-MSDU if available and A-MPDU is off/NACKed;
* A-MPDU+A-MSDU if it's available and negotiated;
* Fast frames if the node is 11abg (and not HT/VHT.)

This allows for things to fail back to A-MSDU or fast frames
if A-MPDU isn't available rather than needing to be non-HT/non-VHT.
It also allows A-MPDU+A-MSDU to work if it's negotiated.

Tested:

* AR9380, STA + AP mode (A-MPDU, A-MSDU, FF, A-MPDU+A-MSDU)
* RT5350, STA mode (A-MSDU, FF)
* AR9170, STA mode (A-MSDU, FF)
2020-06-06 22:25:00 +00:00
Adrian Chadd
4c3682159a [net80211] Fix this typo!
I've just started using this macro in upcoming amsdu/ampdu/ff rework and
yes, too many parens.  Oops!
2020-06-06 06:17:51 +00:00
Adrian Chadd
47bf877bde [net80211] Fix typo.
Oops!
2020-06-06 05:46:12 +00:00
Adrian Chadd
c3739eb66f [net80211] Don't call ic_updateslot if it's not set.
Turns out this isn't a required call. I didn't pick it up because my
uncommitted changes involve new updateslot methods for cards I'm working
on.

Dunce hat to: adrian
2020-06-05 14:17:19 +00:00
Adrian Chadd
48f25cc3c2 [net80211] print out node A-MSDU state.
Now that the node AMSDU TX/RX flags are correctly set in ieee80211_ht.c,
we can print out the AMSDU state here.
2020-06-05 07:38:46 +00:00
Adrian Chadd
ebb9b25672 [net80211] Add initial A-MSDU in A-MPDU negotation support.
This is hopefully a big no-op unless you're running some extra
patches to flip on A-MSDU options in a driver.

802.11n supports sending A-MSDU in A-MPDU. That lets you do things
like pack small frames into an A-MSDU and stuff /those/ into an A-MPDU.
It allows for much more efficient airtime because you're not
wasting time sending small frames - which is still a problem when
doing A-MPDU as there's still per-frame overhead and minimum A-MPDU
density requirements.

It, however, is optional for 802.11n.  A lot of stuff doesn't advertise
it (but does it, just wait!); and I know that ath10k does it and my
ath(4) driver work supports it.

Now, 802.11ac makes A-MSDU in A-MPDU something that can happen more
frequently, because even though you can send very large A-MPDUs
(like 1 megabyte and larger) you still have the small frame problem.
So, 802.11ac NICs like ath10k and iwm will support A-MSDU in A-MPDU
out of the box if it's enabled - and you can negotiate it.

So, let's lay down the ground work to enable A-MSDU in A-MPDU.
This will allow hardware like iwn(4) and ath(4) which supports
software A-MSDU but hardware A-MPDU to be more efficient.

Drivers that support A-MSDU in A-MPDU will set TX/RX htcap flags.
Note this is separate from the software A-MSDU encap path; /that/
dictates whether net80211 is doing A-MSDU encapsulation or not.
These HTC flags control negotiation, NOT encapsulation.

Once this negotiation and driver bits are done, hardware like
rtwn(4), run(4), and others will be able to use A-MSDU even without
A-MPDU working;  right now FF and A-MSDU aren't even attempted
if you're an 11n node.  It's a small hold-over from the initial
A-MPDU work and I know how to fix it, but to flip it on properly
I need to be able to negotiate or ignore A-MSDU in A-MPDU.

Oh and the fun part - some 11ac APs I've tested will quite happily
decap A-MSDU in A-MPDU even though they don't negotiate it when
doing 802.11n.  So hey, I know it works - I just want to properly
handle things. :-)

Tested:

* AR9380, STA/AP mode
2020-06-05 07:38:10 +00:00
Adrian Chadd
d20ff6e680 [net80211] Migrate short slot time configuration into per-vap and deferred taskqueue updates.
The 11b/11g ERP and slot time update handling are two things which weren't
migrated into the per-VAP state when Sam did the initial VAP work.
That makes sense for a lot of setups where net80211 is driving radio state
and the radio only cares about the shared state.

However, as noted by a now deleted comment, the ERP and slot time updates
aren't EXACTLY correct/accurate - they only take into account the most
RECENTLY created VAP, and the state updates when one creates/destroys
VAPs isn't exactly great.

So:

* track the short slot logic per VAP;
* whenever the slot time configuration changes, just push it into a deferred
  task queue update so drivers don't have to serialise it themselves;
* if a driver registers a per-VAP slot time handler then it'll just get the
  per VAP one;
* .. if a driver registers a global one then the legacy behaviour is maintained -
  a single slot time is calculated and pushed out.

Note that the calculated slot time is better than the existing logic - if ANY
of the VAPs require long slot then it's disabled for all VAPs rather than
whatever the last configured VAP did.

Now, this isn't entirely complete - the rest of ERP tracking around short/long
slot capable station tracking needs to be converted into per-VAP, as well
as the preamble/barker flags.  Luckily those also can be done in a similar
fashion - keep per-VAP counters/flags and unify them before doing the driver
update.  I'll defer that work until later.

All the existing drivers can keep doing what they're doing with the global
slot time flags as that is maintained. One driver (iwi) used the per-VAP
flags instead of the ic flags, so now that driver will work properly.

This unblocks some ath10k porting work as the firmware takes the slot time
configuration per-VAP rather than globally, and some firmware handles
STA+AP and STA+STA (on same/different channels) configurations where
the firmware will switch slot time as appropriate.

Tested:

* AR9380, STA/AP mode
* AR9880 (ath10k), STA mode
2020-06-05 06:21:23 +00:00
Adrian Chadd
7280f37401 [net80211] Add some TODOs around A-MSDU in A-MPDU negotiation.
net80211 currently doesn't negotiate A-MSDU in A-MPDU during ADDBA.
I've added the field in net80211 and this commit:

* Prints out the ADDBA field value during ADDBA;
* Adds some comments around where I need to follow up with some
  negotiation logic.

Right now we don't have a driver flag anywhere which controls
whether A-MSDU in A-MPDU is allowed.  I know it works (I have it
manually turned on at home on a couple test APs, heh!) but
I can't flip it on until we can negotiate it.

Tested:

* AR9380, STA/AP mode, printing out ADDBA requests
2020-06-05 06:07:23 +00:00
Adrian Chadd
83fbae0ca6 [net80211] Add field definition for A-MSDU inside A-MPDU.
Now that I have A-MSDU and A-MPDU coexisting together, we need to actually
announce if (a) it's permitted and (b) figure out if we should use it
when transmitting.

This just adds the field; it doesn't yet include it in ADDBA exchanges.
2020-06-05 04:04:47 +00:00
Adrian Chadd
a6ca7ce3c2 [net80211] Add some more debugging during scanning
I'm trying to chase down more weird "I am not doing an incremental scan
when being asked" issues so these debugging statements help.
Notably, I've added more debugging around reasons why the scan is skipped -
eg because the cache is considered hot.

This should be a no-op unless you care about the debugging output!
2020-06-05 00:16:54 +00:00
Adrian Chadd
998bd62c31 [net80211] Print out a bad PN in both hex and decimal.
I've been using this to visually identify when I'm getting corrupted PNs
from the hardware. :(
2020-06-05 00:14:02 +00:00
Adrian Chadd
0b5aeb89eb [net80211] Send a probe request after IBSS node discovery
This sends a probe request after IBSS node discovery through
beacon frames. This allows things like HT and VHT capabilities
to be "negotiated" in adhoc mode.

It is .. kinda fire and pray - this isn't retried after discovery
so it's quite possible that nodes occasionally don't come up with
HT/VHT rate upgrades. At some point it may be a fun side project
to add support for retrying these probe requests/negotiations
after IBSS node discovery.

Tested:

* tested with multiple ath(4) NICs in 11n mode.

Differential Revision:	https://reviews.freebsd.org/D24979
2020-06-05 00:11:44 +00:00
Adrian Chadd
67a26c98f2 [net80211] Fix interrupted scan logic and ticks comparison
The scan task refactoring stuff circa 2014-2016 broke the blocking task
 into a taskqueue with some async bits, but it apparently broke scans
 being interrupted by traffic.

Notably - the new "field" SCAN_PAUSE sets both SCAN_INTERRUPT and SCAN_CANCEL,
and a bunch of existing code was checking for SCAN_CANCEL only and breaking
the scan. Unfortunately it was then (a) cancelling the scan entirely and
(b) not notifying userland that scan was done.

So:
* Update the calls to scan_end() to only pass in 1 (saying the scan is complete)
  if SCAN_CANCEL is set WITHOUT SCAN_INTERRUPT. If both are set then yes,
  the scan is interrupted, but it isn't canceled - it's just paused.
* Update the "did the scan flags change whilst the driver was called" logic
  to check for canceled scans, not interrupted scans.
* The "scan done" logic now explicitly checks for either interrupted or
  completed scans. This accounts for the situation where a scan is being
  aborted via traffic but it ALSO happens to have finished (ie the last
  channel was checked.)

This doesn't ENTIRELY fix scanning as the resume function is broken
due to incorrect ticks math. Thus, the second half of this patch
changes the ieee80211_ticks_*() macros to use int instead of long,
matching the logic that the TCP code does with ticks and handles
wrapping / negative ticks values. If cast to long then the wrapping
math wouldn't work right (ie, if ticks was actually negative,
ie, after the system has been up for a while.)

This allows contbgscan() to correctly calculate if a scan should
continue based on ticks and ic->ic_lastdata .

Reviewed by:	bz
Differential Revision:	https://reviews.freebsd.org/D25031
2020-05-27 18:32:12 +00:00
Andriy Gapon
2c13efdf1c net80211: post RTM_IFINFO notification after toggling IFF_DRV_RUNNING
This is useful when a wireless driver is stopped or started in response
to events like an RF Kill button press.  Applications like
wpa_supplicant depend on such events to have a correct view of interface
state.

Reviewed by:	adrian, cy, melifaro
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D24925
2020-05-22 11:25:45 +00:00
Adrian Chadd
2172664c4b [net80211] Use the unicast key when transmitting DWDS AP multicast frames.
I'm still not sure whether this is the full solution, but here goes.

I have a two node DWDS setup - a main AP with the ethernet bridge uplink
and a satellite AP in the back of the house. They're both AR9344+AR9580
dual band 11n APs.

The problem was that multicast frames was not going from the DWDS AP to
the DWDS STA. Unicast frames are fine, and multicast frames from the
DWDS STA to AP are fine.

Now, multicast and unicast frames from the STA -> AP are just transmitted
using the unicast key.  That's fine.  However, the AP -> STA multicast
frames by default are transmitted using the current default / multicast
key, the shared one between all STAs in a BSS.  Now, the DWDS implementation
ignores non WDS frames - it only allows about 4 address frames outside
of management / EAPOL frames! - so the STA side ignores the normal multicast
frames.

Instead, the AP side uses ieee80211_dwds_mcast() to send multicast frames
to each WDS VAP that was created as part of the "dynamic" part of DWDS.
This should be queuing them individually to each node instead of using
the normal multicast send path; and this is how they should get turned into
4-addr WDS frames.

HOWEVER, ieee80211_encap() was trying to use the default TX key to queue
them rather than the unicast key that's already setup.  Since this synthetic
node doesn't have the default TX key setup, transmission fails.  Things
would be fine in WEP and in open mode because in both cases you would
have static keys (or no keys) setup.  It just fails in WPA mode.

This resolves the issue.  AP DWDS multicast is now sent using the unicast
key just like in STA mode and I'm pretty sure the STA mode side will stil
work fine (as it's a STA VAP with a DWDS flag..)

Tested:

* TL-WDR3600/4300 APs
2020-05-08 17:01:33 +00:00
John Baldwin
88901af835 Don't indirect user pointers directly in two 802.11s ioctls.
IEEE80211_MESH_RTCMD_ADD was invoking memcmp() to validate the
supplied address directly on the user pointer rather than first doing
a copyin() and validating the copied value.

IEEE80211_MESH_RTCMD_DELETE was passing the user pointer directly to
ieee80211_mesh_rt_del() rather than copying the user buffer into a
temporary kernel buffer.

Reviewed by:	brooks, kib
Obtained from:	CheriBSD
MFC after:	2 weeks
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D24562
2020-04-24 22:10:02 +00:00
Brooks Davis
6671366a55 Fix -Wvoid-pointer-to-enum-cast warnings.
This pattern is used in callbacks with void * data arguments and seems
both relatively uncommon and relatively harmless.  Silence the warning
by casting through uintptr_t.

This warning is on by default in Clang 11.

Reviewed by:	arichardson
Obtained from:	CheriBSD (partial)
MFC after:	1 week
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D24425
2020-04-15 18:15:58 +00:00
Pawel Biernacki
08f5e6bb81 Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (7 of many)
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked).
Use it in preparation for a general review of all nodes.

This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Mark all low hanging fruits as MPSAFE.

Reviewed by:	markj
Approved by:	kib (mentor, blanket)
Differential Revision:	https://reviews.freebsd.org/D23626
2020-02-21 16:32:17 +00:00
Conrad Meyer
c1475a191e net80211: Move rate printing in amrr_node_stats() to a separate method
This makes amrr_node_stats() cleaner and allows the rate printing to be
reusable.

Submitted by:	Neel Chauhan <neel at neelc.org>
Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D22318
2020-01-17 22:04:11 +00:00
Gleb Smirnoff
2b60ecf197 Don't use if_maddr_rlock() in 802.11, use epoch(9) directly instead. 2019-10-10 23:55:33 +00:00
Bjoern A. Zeeb
cd02c6b10d Enhance the comment ieee80211_add_channel() to avoid a
misunderstanding that the function does not work additive
when repeatedly called for diffferent bands.

Reviewed by:	avos (a few months ago)
MFC after:	2 weeks
2019-06-10 14:31:18 +00:00
John Baldwin
fb3bc59600 Restructure mbuf send tags to provide stronger guarantees.
- Perform ifp mismatch checks (to determine if a send tag is allocated
  for a different ifp than the one the packet is being output on), in
  ip_output() and ip6_output().  This avoids sending packets with send
  tags to ifnet drivers that don't support send tags.

  Since we are now checking for ifp mismatches before invoking
  if_output, we can now try to allocate a new tag before invoking
  if_output sending the original packet on the new tag if allocation
  succeeds.

  To avoid code duplication for the fragment and unfragmented cases,
  add ip_output_send() and ip6_output_send() as wrappers around
  if_output and nd6_output_ifp, respectively.  All of the logic for
  setting send tags and dealing with send tag-related errors is done
  in these wrapper functions.

  For pseudo interfaces that wrap other network interfaces (vlan and
  lagg), wrapper send tags are now allocated so that ip*_output see
  the wrapper ifp as the ifp in the send tag.  The if_transmit
  routines rewrite the send tags after performing an ifp mismatch
  check.  If an ifp mismatch is detected, the transmit routines fail
  with EAGAIN.

- To provide clearer life cycle management of send tags, especially
  in the presence of vlan and lagg wrapper tags, add a reference count
  to send tags managed via m_snd_tag_ref() and m_snd_tag_rele().
  Provide a helper function (m_snd_tag_init()) for use by drivers
  supporting send tags.  m_snd_tag_init() takes care of the if_ref
  on the ifp meaning that code alloating send tags via if_snd_tag_alloc
  no longer has to manage that manually.  Similarly, m_snd_tag_rele
  drops the refcount on the ifp after invoking if_snd_tag_free when
  the last reference to a send tag is dropped.

  This also closes use after free races if there are pending packets in
  driver tx rings after the socket is closed (e.g. from tcpdrop).

  In order for m_free to work reliably, add a new CSUM_SND_TAG flag in
  csum_flags to indicate 'snd_tag' is set (rather than 'rcvif').
  Drivers now also check this flag instead of checking snd_tag against
  NULL.  This avoids false positive matches when a forwarded packet
  has a non-NULL rcvif that was treated as a send tag.

- cxgbe was relying on snd_tag_free being called when the inp was
  detached so that it could kick the firmware to flush any pending
  work on the flow.  This is because the driver doesn't require ACK
  messages from the firmware for every request, but instead does a
  kind of manual interrupt coalescing by only setting a flag to
  request a completion on a subset of requests.  If all of the
  in-flight requests don't have the flag when the tag is detached from
  the inp, the flow might never return the credits.  The current
  snd_tag_free command issues a flush command to force the credits to
  return.  However, the credit return is what also frees the mbufs,
  and since those mbufs now hold references on the tag, this meant
  that snd_tag_free would never be called.

  To fix, explicitly drop the mbuf's reference on the snd tag when the
  mbuf is queued in the firmware work queue.  This means that once the
  inp's reference on the tag goes away and all in-flight mbufs have
  been queued to the firmware, tag's refcount will drop to zero and
  snd_tag_free will kick in and send the flush request.  Note that we
  need to avoid doing this in the middle of ethofld_tx(), so the
  driver grabs a temporary reference on the tag around that loop to
  defer the free to the end of the function in case it sends the last
  mbuf to the queue after the inp has dropped its reference on the
  tag.

- mlx5 preallocates send tags and was using the ifp pointer even when
  the send tag wasn't in use.  Explicitly use the ifp from other data
  structures instead.

- Sprinkle some assertions in various places to assert that received
  packets don't have a send tag, and that other places that overwrite
  rcvif (e.g. 802.11 transmit) don't clobber a send tag pointer.

Reviewed by:	gallatin, hselasky, rgrimes, ae
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20117
2019-05-24 22:30:40 +00:00
Andriy Voskoboinyk
f35b8451ba net80211: correct check for SMPS node flags updates
Update node flags when driver supports SMPS, not when it is disabled or
in dynamic mode ((iv_htcaps & HTCAP_SMPS) != 0).

Checked with RTL8188EE (1T1R), STA mode - 'smps' word should disappear
from 'ifconfig wlan0' output.

MFC after:	2 weeks
2019-03-18 02:40:22 +00:00
Andriy Voskoboinyk
f3f08e16a3 net80211(4): hide casts for 'i_seq' field offset calculation inside
ieee80211_getqos() and reuse it in various places.

Checked with RTL8188EE, HOSTAP mode + RTL8188CUS, STA mode.

MFC after:	2 weeks
2019-02-10 23:58:56 +00:00
Andriy Voskoboinyk
545619f3f2 net80211(4): validate supplied roam:rate values from ifconfig(8)
MFC after:	4 days
2019-02-06 13:01:21 +00:00
Andriy Voskoboinyk
1c4cb65153 net80211(4): do not setup Tx parameters for unsupported modes.
That should shorten 'ifconfig <wlan> list txparam' output since
unsupported modes will not be shown.

Checked with RTL8188EE, STA mode.

MFC after:	2 weeks
2019-02-03 04:31:50 +00:00
Andriy Voskoboinyk
2ce6d2b58c net80211(4): fix rate check when 'roaming' ifconfig(8) option is set to 'auto'
Do not try to clear 'basic rate' bit from roamRate; it cannot be here and,
actually, this operation clears 'MCS rate' bit instead, breaking comparison
for 11n / 11ac modes.

Tested with RTL8188CUS, HOSTAP mode + RTL8821AU, STA mode.

MFC after:	3 days
2019-02-03 02:32:13 +00:00
Andriy Voskoboinyk
511e2766f1 net80211(4): do not setup roaming parameters for unsupported modes.
ifconfig(8) prints per-mode parameters if they are non-zero; since
we have 13 possible modes with 3...5 typically supported this change
should greatly reduce amount of information for 'ifconfig <wlan> list roam'
command.

While here ensure that sta_roam_check() will not use roaming parameters
for unsupported modes (it should not).

This change effectively reverts r188776.

MFC after:	2 weeks
2019-02-03 01:32:02 +00:00
Andriy Voskoboinyk
378478f9fc Drop unused M_80211_COM malloc(9) type.
It is not used since r287197.

MFC after:	3 days
2019-02-02 16:23:45 +00:00
Andriy Voskoboinyk
4ab4d681f3 Do not acquire IEEE80211_LOCK twice in cac_timeout(); reuse
locked function instead.

It is externally visible since r257065.

MFC after:	5 days
2019-02-02 16:21:23 +00:00
Andriy Voskoboinyk
b84b36380e Remove 2GHz channel list copies from wireless drivers.
Wrap ieee80211_add_channel_list_2ghz into another function
which supplies default (1-14) channel list to it and drop
its copies from drivers.

Checked with RTL8188EE, country US / JP / KR / UA.

MFC after:	2 weeks
2019-01-26 17:00:55 +00:00
Andriy Voskoboinyk
9df9e9361c net80211: reuse TICKS_2_MSEC / MSEC_2_TICKS macros from sys/time.h
Replace in-place implementation with system-wide one; since it
guarantees non-zero result drop all less-than-one checks from
drivers and net80211.

MFC after:	2 weeks
2019-01-25 01:05:18 +00:00
Andriy Voskoboinyk
7e2bcba46e net80211: turn channel mode check into assertion.
There is may be only 11b channel (since chanflags[] table
maps MODE_AUTO to the corresponding 11b channel flags).

Checked with RTL8812AU, STA mode.

MFC after:	5 days
2019-01-23 13:17:03 +00:00
Andriy Voskoboinyk
d514ab894a net80211: fix channel list construction for non-auto operating mode.
Change the way how channel list mode <-> desired mode match is done:
- Match channel list mode for next non-auto desired modes:
 * 11b: 11g, 11ng, 11acg;
 * 11a: 11na, 11ac
- Add pre-defined channels only when one of the next conditions met:
 * the desired channel mode is 'auto' or
 * the desired channel and selected channel list modes are exactly
the same or
 * the previous rule (11g / 11n / 11ac promotion) applies.

Before r275875 construction work properly for all except
11ng / 11na / 11acg / 11ac modes - these were broken at all
(i.e., the scan list was empty); after r275875 all checks were removed,
so scan table was populated by all device-compatible channels
(desired mode was ignored).

For example, if I will set 'ifconfig wlan0 mode 11ng' for RTL8821AU:
- pre-r275875: nothing, scan will not work;
- after r275875: both 11ng and 11na bands were scanned; also, since 11b
channel list was used, 14th channel was scanned too.
- after this change: only 11ng - 1-13 channels - are used for scanning.

Tested with:
 * RTL8188EE, STA mode.
 * RTL8821AU, STA mode.

MFC after:	5 days
2019-01-23 12:43:46 +00:00
Andriy Voskoboinyk
dab61567ab net80211: resolve ioctl <-> detach race for ieee80211com structure
Since r287197 ieee80211com is a part of drivers softc; as a result,
after detach all pointers to it (iv_ic, ni_ic) are invalid. Most
possible users (tasks, interrupt handlers) are blocked / removed
when device is stopped; however, ioctl handlers were not tracked
and may crash if ieee80211com structure is accessed.

Since ieee80211com pointer access from ieee80211vap structure is not
protected by lock (constant after interface creation) and used in
many other places just use reference counting for ioctl handlers;
on detach set 'detached' flag and wait until reference counter goes to 0.

For HEAD ieee80211vap size was changed (__FreeBSD_version bumped);
however, in stable branches I'm going to split / reuse the last
iv_spare field for KBI stability.

Tested with:
 - rsu(4), SIOCSIFCAP (-rxcsum) ioctl;
 - rtwn_pci(4), SIOCG80211 / IEEE80211_IOC_HTPROTMODE ioctl.

MFC after:	1 week
2019-01-20 13:39:18 +00:00
Oleksandr Tymoshenko
f280f93df7 [ifconfig] Print more WPS attributes in verbose "list scan" output
- Move WPS related defines to dedicated file
- Add handlers for more WPS attributes

PR:		217317
Submitted by:	J.R. Oldroyd <fbsd@opal.com>
MFC after:	3 weeks
2019-01-20 00:45:44 +00:00