Commit Graph

36 Commits (master)

Author SHA1 Message Date
Nicolas Dichtel a558da0916 ieee802154: use nla_put_u64_64bit()
Signed-off-by: Nicolas Dichtel <>
Signed-off-by: David S. Miller <>
2016-04-25 15:09:11 -04:00
Lennert Buytenhek 01c8d2bbd4 ieee802154: Remove 802.15.4/6LoWPAN checks for interface MTU.
In the past, 802.15.4 interfaces and 6LoWPAN interfaces used the
same dev->type (ARPHRD_IEEE802154), and 802.15.4 interfaces were
distinguished from 6LoWPAN interfaces by their differing dev->mtu.

6LoWPAN interfaces have their own ARPHRD type now, so there is no
longer any need to check dev->mtu to distinguish 802.15.4 devices
from 6LoWPAN devices.

Signed-off-by: Lennert Buytenhek <>
Acked-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2015-05-26 20:26:09 +02:00
Alexander Aring c947f7e1e3 mac802154: remove mib lock
This patch removes the mib lock. The new locking mechanism is to protect
the mib values with the rtnl lock. Note that this isn't always necessary
if we have an interface up the most mib values are readonly (e.g.
address settings). With this behaviour we can remove locking in
hotpath like frame parsing completely. It depends on context if we need
to hold the rtnl lock or not, this makes the callbacks of
ieee802154_mlme_ops unnecessary because these callbacks hols always the

Signed-off-by: Alexander Aring <>
Reviewed-by: Stefan Schmidt <>
Signed-off-by: Marcel Holtmann <>
2015-05-23 17:57:08 +02:00
Alexander Aring 32b23550ad ieee802154: change cca ed level to mbm
This patch change the handling of cca energy detection level from dbm to
mbm. This prepares to handle floating point cca energy detection levels
values. The old netlink 802.15.4 will convert the dbm value to mbm for
handling backward compatibility.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2015-05-19 11:44:42 +02:00
Alexander Aring e2eb173aaa ieee802154: change transmit power to mbm
This patch change the handling of transmit power level from dbm to mbm.
This prepares to handle floating point transmit power levels values. The
old netlink 802.15.4 will convert the dbm value to mbm for handling
backward compatibility.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2015-05-19 11:44:41 +02:00
Julia Lawall b6d595e3f7 ieee802154: don't export static symbol
The semantic patch that fixes this problem is as follows:

// <smpl>
type T;
identifier f;

static T f (...) { ... }

identifier r.f;
declarer name EXPORT_SYMBOL;

// </smpl>

Signed-off-by: Julia Lawall <>
Acked-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2015-03-14 17:11:31 +01:00
Johannes Berg 053c095a82 netlink: make nlmsg_end() and genlmsg_end() void
Contrary to common expectations for an "int" return, these functions
return only a positive value -- if used correctly they cannot even
return 0 because the message header will necessarily be in the skb.

This makes the very common pattern of

  if (genlmsg_end(...) < 0) { ... }

be a whole bunch of dead code. Many places also simply do

  return nlmsg_end(...);

and the caller is expected to deal with it.

This also commonly (at least for me) causes errors, because it is very
common to write

  if (my_function(...))
    /* error condition */

and if my_function() does "return nlmsg_end()" this is of course wrong.

Additionally, there's not a single place in the kernel that actually
needs the message length returned, and if anyone needs it later then
it'll be very easy to just use skb->len there.

Remove this, and make the functions void. This removes a bunch of dead
code as described above. The patch adds lines because I did

-	return nlmsg_end(...);
+	nlmsg_end(...);
+	return 0;

I could have preserved all the function's return values by returning
skb->len, but instead I've audited all the places calling the affected
functions and found that none cared. A few places actually compared
the return value with <= 0 in dump functionality, but that could just
be changed to < 0 with no change in behaviour, so I opted for the more
efficient version.

One instance of the error I've made numerous times now is also present
in net/phonet/pn_netlink.c in the route_dumpit() function - it didn't
check for <0 or <=0 and thus broke out of the loop every single time.
I've preserved this since it will (I think) have caused the messages to
userspace to be formatted differently with just a single message for
every SKB returned to userspace. It's possible that this isn't needed
for the tools that actually use this, but I don't even know what they
are so couldn't test that changing this behaviour would be acceptable.

Signed-off-by: Johannes Berg <>
Signed-off-by: David S. Miller <>
2015-01-18 01:03:45 -05:00
Alexander Aring 7fe9a3882b ieee802154: rework cca setting
The current cca setting handle is a driver specific call. We need to
introduce some 802.15.4 specific layer and mapping 802.15.4 cca modes to
driver specific ones inside the 802.15.4 driver. This patch will add
such 802.15.4 layer and mapping the cca settings to driver specific ones.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-12-19 00:19:23 +01:00
Stefan Schmidt 6c10dc05b8 net/ieee802154: Remove and add extra blank lines as needed.
Some have been missing and some have been needed. Just cosmetics.

Signed-off-by: Stefan Schmidt <>
Acked-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-12-05 12:43:05 +01:00
Varka Bhadram 69bb631ef9 ieee802154: fix spelling mistakes
Signed-off-by: Varka Bhadram <>
Acked-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-26 06:00:13 +01:00
Alexander Aring 87023e1058 ieee802154: fix iface dump with lowpan
This patch adds a hacked solution for an interface dump with a running
lowpan interface. This will crash because lowpan and wpan interface use
the same arphdr. To change the arphdr will change the UAPI, this patch
checks on mtu which should on lowpan interface always different than

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-09 19:50:29 +01:00
Alexander Aring 7bea1ea7b4 ieee802154: netlink add rtnl lock
This patch adds rtnl lock hold mechanism while accessing wpan_dev
attributes. Furthermore these attributes should be protected by rtnl
lock and netif_running only.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-09 19:50:29 +01:00
Alexander Aring bd28a11f25 ieee802154: remove mlme get_phy callback
This patch removes the get_phy callback from mlme ops structure. Instead
we doing a dereference via ieee802154_ptr dev pointer. For backwards
compatibility we need to run get_device after dereference wpan_phy via

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-05 21:53:04 +01:00
Alexander Aring 9f3295b9ea ieee802154: remove nl802154 unused functions
The include/net/nl802154.h file contains a lot of prototypes which are
not used inside of ieee802154 subsystem. This patch removes this file
and make the only one used prototype "ieee802154_nl_start_confirm" as
static declaration in ieee802154/nl-mac.c

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-05 21:53:03 +01:00
Alexander Aring 8f499f991c ieee802154: don't allow to change addr while netif_running
This patch changes the actual behaviour for setting address attributes.
We should not change addresses while netif_running is true. Furthermore
when netif_running is running the address attributes becomes read only
and we can remove locking mechanism in receive and transmit hothpaths
of 802.15.4 subsystem.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-11-02 04:51:07 +01:00
Alexander Aring a543c5989d mac802154: remove driver ops in wpan-phy
This patch removes the driver ops callbacks inside of wpan_phy struct.
It was used to check if a phy supports this driver ops call. We do this
now via hardware flags.

Signed-off-by: Alexander Aring <>
Signed-off-by: Marcel Holtmann <>
2014-10-28 23:19:07 +01:00
Alexander Aring 4ca24aca55 ieee802154: move ieee802154 header
This patch moves the ieee802154 header into include/linux instead
include/net. Similar like wireless which have the ieee80211 header
inside of include/linux.

Signed-off-by: Alexander Aring <>
Cc: Alan Ott <>
Signed-off-by: Marcel Holtmann <>
2014-10-25 21:39:57 +02:00
Alexander Aring 5ad60d3699 ieee802154: move wpan-phy.h to cfg802154.h
The wpan-phy header contains the wpan_phy struct information. Later this
header will be have similar function like cfg80211 header. The cfg80211
header contains the wiphy struct which is identically the wpan_phy
struct inside 802.15.4 subsystem.

Signed-off-by: Alexander Aring <>
Cc: Alan Ott <>
Signed-off-by: Marcel Holtmann <>
2014-10-25 21:39:56 +02:00
Alexander Aring b3020f0a35 ieee802154: mac802154: remove FSF address
This patch removes the FSF address in files which belongs to ieee802154
and mac802154.

Signed-off-by: Alexander Aring <>
Cc: Alan Ott <>
Signed-off-by: Marcel Holtmann <>
2014-10-25 08:07:30 +02:00
Varka Bhadram 4710d806fc 6lowpan: mac802154: fix coding style issues
This patch fixed the coding style issues reported by

following issues fixed:
	CHECK: Alignment should match open parenthesis
	WARNING: line over 80 characters
	CHECK: Blank lines aren't necessary before a close brace '}'
	WARNING: networking block comments don't use an empty /* line, use /* Comment...
	WARNING: Missing a blank line after declarations
	WARNING: networking block comments start with * on subsequent lines
	CHECK: braces {} should be used on all arms of this statement

Signed-off-by: Varka Bhadram <>
Tested-by: Alexander Aring <>
Signed-off-by: David S. Miller <>
2014-07-07 20:55:22 -07:00
Dan Carpenter b3f7a7b48f ieee802154: missing put_dev() on error
We should call put_dev() on the error path here.

Fixes: 3e9c156e2c ('ieee802154: add netlink interfaces for llsec')
Signed-off-by: Dan Carpenter <>
Signed-off-by: David S. Miller <>
2014-05-22 15:54:45 -04:00
Phoebe Buckheister 3e9c156e2c ieee802154: add netlink interfaces for llsec
This patch adds user-visible interfaces for the llsec infrastructure.
For the added methods, the only major difference between all add/remove
implementation lies in how the specific object is parsed, and for dump
requests, how objects are written into netlink messages.

To save on boilerplate code, table dumps are routed through a helper
function that handles netlink dump state, leaving the actual dumping
code to care only about iterating over the table to be dumped and
filling netlink messages. For add/remove methods, the boilerplate
required to work is not quite as large, but still enough to also move
into a local helper.

Signed-off-by: Phoebe Buckheister <>
Signed-off-by: David S. Miller <>
2014-05-16 17:23:41 -04:00
Phoebe Buckheister e462ded699 mac802154: make csma/cca parameters per-wpan
Commit 9b2777d608 (ieee802154: add TX power control to wpan_phy)
and following erroneously added CSMA and CCA parameters for 802.15.4
devices as PHY parameters, while they are actually MAC parameters and
can differ for any two WPAN instances. Since it is now sensible to have
multiple WPAN devices with differing CSMA/CCA parameters, make these
parameters MAC parameters instead.

Signed-off-by: Phoebe Buckheister <>
Signed-off-by: David S. Miller <>
2014-04-01 16:25:51 -04:00
Phoebe Buckheister ae531b9475 ieee802154: use ieee802154_addr instead of *_sa variants
Change all internal uses of ieee802154_addr_sa to ieee802154_addr,
except for those instances that communicate directly with userspace.

Signed-off-by: Phoebe Buckheister <>
Signed-off-by: David S. Miller <>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister b70ab2e87f ieee802154: enforce consistent endianness in the 802.15.4 stack
Enable sparse warnings about endianness, replace the remaining fields
regarding network operations without explicit endianness annotations
with such that are annotated, and propagate this through the entire

Uses of ieee802154_addr_sa are not changed yet, this patch is only
concerned with all other fields (such as address filters, operation
parameters and the likes).

Signed-off-by: Phoebe Buckheister <>
Signed-off-by: David S. Miller <>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister 376b7bd355 ieee802154: rename struct ieee802154_addr to *_sa
The struct as currently defined uses host byte order for some fields,
and most big endian/EUI display byte order for other fields. Inside the
stack, endianness should ideally match network byte order where possible
to minimize the number of byteswaps done in critical paths, but this
patch does not address this; it is only preparatory.

Signed-off-by: Phoebe Buckheister <>
Signed-off-by: David S. Miller <>
2014-03-14 22:15:25 -04:00
Johannes Berg 2a94fe48f3 genetlink: make multicast groups const, prevent abuse
Register generic netlink multicast groups as an array with
the family and give them contiguous group IDs. Then instead
of passing the global group ID to the various functions that
send messages, pass the ID relative to the family - for most
families that's just 0 because the only have one group.

This avoids the list_head and ID in each group, adding a new
field for the mcast group ID offset to the family.

At the same time, this allows us to prevent abusing groups
again like the quota and dropmon code did, since we can now
check that a family only uses a group it owns.

Signed-off-by: Johannes Berg <>
Signed-off-by: David S. Miller <>
2013-11-19 16:39:06 -05:00
Johannes Berg 1c582d915d ieee802154: use genl_register_family_with_ops()
This simplifies the code since there's no longer a need to
have error handling in the registration.

Unfortunately it means more extern function declarations are
needed, but the overall goal would seem to justify this.

While at it, also fix the registration error path - if the
family registration failed then it shouldn't be unregistered.

Signed-off-by: Johannes Berg <>
Signed-off-by: David S. Miller <>
2013-11-14 17:10:40 -05:00
Werner Almesberger 56aa091d60 ieee802154/nl-mac.c: make some MLME operations optional
Check for NULL before calling the following operations from "struct
ieee802154_mlme_ops": assoc_req, assoc_resp, disassoc_req, start_req,
and scan_req.

This fixes a current oops where those functions are called but not
implemented. It also updates the documentation to clarify that they
are now optional by design. If a call to an unimplemented function
is attempted, the kernel returns EOPNOTSUPP via netlink.

The following operations are still required: get_phy, get_pan_id,
get_short_addr, and get_dsn.

Note that the places where this patch changes the initialization
of "ret" should not affect the rest of the code since "ret" was
always set (again) before returning its value.

Signed-off-by: Werner Almesberger <>
Signed-off-by: David S. Miller <>
2013-04-08 12:00:16 -04:00
Eric W. Biederman 15e473046c netlink: Rename pid to portid to avoid confusion
It is a frequent mistake to confuse the netlink port identifier with a
process identifier.  Try to reduce this confusion by renaming fields
that hold port identifiers portid instead of pid.

I have carefully avoided changing the structures exported to
userspace to avoid changing the userspace API.

I have successfully built an allyesconfig kernel with this change.

Signed-off-by: "Eric W. Biederman" <>
Acked-by: Stephen Hemminger <>
Signed-off-by: David S. Miller <>
2012-09-10 15:30:41 -04:00
Thomas Graf 58050fce35 net: Use NLMSG_DEFAULT_SIZE in combination with nlmsg_new()
Using NLMSG_GOODSIZE results in multiple pages being used as
nlmsg_new() will automatically add the size of the netlink
header to the payload thus exceeding the page limit.

NLMSG_DEFAULT_SIZE takes this into account.

Signed-off-by: Thomas Graf <>
Cc: Jiri Pirko <>
Cc: Dmitry Eremin-Solenikov <>
Cc: Sergey Lapin <>
Cc: Johannes Berg <>
Cc: Lauro Ramos Venancio <>
Cc: Aloisio Almeida Jr <>
Cc: Samuel Ortiz <>
Reviewed-by: Jiri Pirko <>
Signed-off-by: David S. Miller <>
2012-06-28 17:56:43 -07:00
David S. Miller be51da0f3e ieee802154: Stop using NLA_PUT*().
These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.

Signed-off-by: David S. Miller <>
2012-04-02 04:33:43 -04:00
Paul Gortmaker bc3b2d7fb9 net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules
These files are non modular, but need to export symbols using
the macros now living in export.h -- call out the include so
that things won't break when we remove the implicit presence
of module.h from everywhere.

Signed-off-by: Paul Gortmaker <>
2011-10-31 19:30:30 -04:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <>
Guess-its-ok-by: Christoph Lameter <>
Cc: Ingo Molnar <>
Cc: Lee Schermerhorn <>
2010-03-30 22:02:32 +09:00
Dmitry Eremin-Solenikov 0a868b26c8 ieee802154: add PHY_NAME to LIST_IFACE command results
Signed-off-by: Dmitry Eremin-Solenikov <>
2009-11-06 14:32:22 +03:00
Dmitry Eremin-Solenikov 78fe738d1a ieee802154: split away MAC commands implementation
Move all mac-related stuff to separate file so that ieee802154/netlink.c
contains only generic code.

Signed-off-by: Dmitry Eremin-Solenikov <>
2009-11-06 14:31:20 +03:00