1. 14 Feb, 2011 1 commit
  2. 21 Jan, 2011 1 commit
    • Bruno Randolf's avatar
      cfg80211: Extend channel to frequency mapping for 802.11j · 59eb21a6
      Bruno Randolf authored
      Extend channel to frequency mapping for 802.11j Japan 4.9GHz band, according to
      IEEE802.11 section 17.3.8.3.2 and Annex J. Because there are now overlapping
      channel numbers in the 2GHz and 5GHz band we can't map from channel to
      frequency without knowing the band. This is no problem as in most contexts we
      know the band. In places where we don't know the band (and WEXT compatibility)
      we assume the 2GHz band for channels below 14.
      
      This patch does not implement all channel to frequency mappings defined in
      802.11, it's just an extension for 802.11j 20MHz channels. 5MHz and 10MHz
      channels as well as 802.11y channels have been omitted.
      
      The following drivers have been updated to reflect the API changes:
      iwl-3945, iwl-agn, iwmc3200wifi, libertas, mwl8k, rt2x00, wl1251, wl12xx.
      The drivers have been compile-tested only.
      Signed-off-by: default avatarBruno Randolf <br1@einfach.org>
      Signed-off-by: default avatarBrian Prodoehl <bprodoehl@gmail.com>
      Acked-by: default avatarLuciano Coelho <coelho@ti.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      59eb21a6
  3. 13 Dec, 2010 1 commit
  4. 24 Nov, 2010 1 commit
  5. 16 Nov, 2010 1 commit
  6. 25 Oct, 2010 1 commit
  7. 05 Oct, 2010 1 commit
  8. 25 Aug, 2010 1 commit
  9. 16 Aug, 2010 1 commit
  10. 21 Jul, 2010 2 commits
    • Johannes Berg's avatar
      mac80211: proper IBSS locking · 7a17a33c
      Johannes Berg authored
      IBSS has never had locking, instead relying on some
      memory barriers etc. That's hard to get right, and
      I think we had it wrong too until the previous patch.
      Since this is not performance sensitive, it doesn't
      make sense to have the maintenance overhead of that,
      so add proper locking.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      7a17a33c
    • Johannes Berg's avatar
      mac80211: fix IBSS lockdep complaint · bc05d19f
      Johannes Berg authored
      Bob reported a lockdep complaint originating in
      the mac80211 IBSS code due to the common work
      struct patch. The reason is that the IBSS and
      station mode code have different locking orders
      for the cfg80211 wdev lock and the work struct
      (where "locking" implies running/canceling).
      
      Fix this by simply not canceling the work in
      the IBSS code, it is not necessary since when
      the REQ_RUN bit is cleared, the work will run
      without effect if it runs. When the interface
      is set down, it is flushed anyway, so there's
      no concern about it running after memory has
      been invalidated either.
      
      This fixes
      https://bugzilla.kernel.org/show_bug.cgi?id=16419
      
      Additionally, looking into this I noticed that
      there's a small window while the IBSS is torn
      down in which the work may be rescheduled and
      the REQ_RUN bit be set again after leave() has
      cleared it when a scan finishes at exactly the
      same time. Avoid that by setting the ssid_len
      to zero before clearing REQ_RUN which signals
      to the scan finish code that this interface is
      not active.
      Reported-by: default avatarBob Copeland <me@bobcopeland.com>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      bc05d19f
  11. 14 Jun, 2010 8 commits
  12. 03 Jun, 2010 1 commit
  13. 07 May, 2010 1 commit
    • Johannes Berg's avatar
      mac80211: improve HT channel handling · 0aaffa9b
      Johannes Berg authored
      Currently, when one interface switches HT mode,
      all others will follow along. This is clearly
      undesirable, since the new one might switch to
      no-HT while another one is operating in HT.
      
      Address this issue by keeping track of the HT
      mode per interface, and allowing only changes
      that are compatible, i.e. switching into HT40+
      is not possible when another interface is in
      HT40-, in that case the second one needs to
      fall back to HT20.
      
      Also, to allow drivers to know what's going on,
      store the per-interface HT mode (channel type)
      in the virtual interface's bss_conf.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      0aaffa9b
  14. 05 May, 2010 1 commit
  15. 03 May, 2010 1 commit
    • Johannes Berg's avatar
      mac80211: improve IBSS scanning · be4a4b6a
      Johannes Berg authored
      When IBSS is fixed to a frequency, it can still
      scan to try to find the right BSSID. This makes
      sense if the BSSID isn't also fixed, but it need
      not scan all channels -- just one is sufficient.
      Make it do that by moving the scan setup code to
      ieee80211_request_internal_scan() and include
      a channel variable setting.
      
      Note that this can be further improved to start
      the IBSS right away if both frequency and BSSID
      are fixed.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      be4a4b6a
  16. 30 Apr, 2010 1 commit
  17. 28 Apr, 2010 1 commit
  18. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      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.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      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
        file.
      
      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
         files.
      
      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
         necessary.
      
      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: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  19. 16 Mar, 2010 2 commits
  20. 09 Mar, 2010 1 commit
    • Bruno Randolf's avatar
      mac80211: fix rates setup on IBSS merge · b4d59a93
      Bruno Randolf authored
      when an IBSS merge happened, the supported rates for the newly added station
      were left empty, causing the rate control module to be initialized with only
      the basic rates.
      
      also the section of the ibss code which deals with updating supported rates for
      an already existing station fails to inform the rate control module about the
      new rates. as i don't know how to fix this (minstrel does not have an update
      function), i have just added a comment for now.
      Signed-off-by: default avatarBruno Randolf <br1@einfach.org>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      b4d59a93
  21. 08 Feb, 2010 2 commits
    • Johannes Berg's avatar
      mac80211: allow station add/remove to sleep · 34e89507
      Johannes Berg authored
      Many drivers would like to sleep during station
      addition and removal, and currently have a high
      complexity there from not being able to.
      
      This introduces two new callbacks sta_add() and
      sta_remove() that drivers can implement instead
      of using sta_notify() and that can sleep, and
      the new sta_add() callback is also allowed to
      fail.
      
      The reason we didn't do this previously is that
      the IBSS code wants to insert stations from the
      RX path, which is a tasklet, so cannot sleep.
      This patch will keep the station allocation in
      that path, but moves adding the station to the
      driver out of line. Since the addition can now
      fail, we can have IBSS peer structs the driver
      rejected -- in that case we still talk to the
      station but never tell the driver about it in
      the control.sta pointer. If there will ever be
      a driver that has a low limit on the number of
      stations and that cannot talk to any stations
      that are not known to it, we need to do come up
      with a new strategy of handling larger IBSSs,
      maybe quicker expiry or rejecting peers.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      34e89507
    • Benoit Papillault's avatar
      mac80211: Fix probe request filtering in IBSS mode · 0da780c2
      Benoit Papillault authored
      We only reply to probe request if either the requested SSID is the
      broadcast SSID or if the requested SSID matches our own SSID. This
      latter case was not properly handled since we were replying to different
      SSID with the same length as our own SSID.
      Signed-off-by: default avatarBenoit Papillault <benoit.papillault@free.fr>
      Cc: stable@kernel.org
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      0da780c2
  22. 19 Jan, 2010 2 commits
  23. 28 Dec, 2009 3 commits
  24. 21 Dec, 2009 2 commits
    • Johannes Berg's avatar
      mac80211: reduce reliance on netdev · 47846c9b
      Johannes Berg authored
      For bluetooth 3, we will most likely not have
      a netdev for a virtual interface (sdata), so
      prepare for that by reducing the reliance on
      having a netdev. This patch moves the name
      and address fields into the sdata struct and
      uses them from there all over. Some work is
      needed to keep them sync'ed, but that's not
      a lot of work and in slow paths anyway.
      
      In doing so, this also reduces the number of
      pointer dereferences in many places, because
      of things like sdata->dev->dev_addr becoming
      sdata->vif.addr.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      47846c9b
    • Johannes Berg's avatar
      mac80211: make station management completely depend on vif · abe60632
      Johannes Berg authored
      The station management currently uses the virtual
      interface, but you cannot add the same station to
      multiple virtual interfaces if you're communicating
      with it in multiple ways.
      
      This restriction should be lifted so that in the
      future we can, for instance, support bluetooth 3
      with an access point that mac80211 is already
      associated to.
      
      We can do that by requiring all sta_info_get users
      to provide the virtual interface and making the RX
      code aware that an address may match more than one
      station struct. Thanks to the previous patches this
      one isn't all that large and except for the RX and
      TX status paths changes has low complexity.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      abe60632
  25. 18 Nov, 2009 1 commit
  26. 04 Nov, 2009 1 commit
    • Sujith's avatar
      mac80211: Fix IBSS merge · 450aae3d
      Sujith authored
      Currently, in IBSS mode, a single creator would go into
      a loop trying to merge/scan. This happens because the IBSS timer is
      rearmed on finishing a scan and the subsequent
      timer invocation requests another scan immediately.
      
      This patch fixes this issue by checking if we have just completed
      a scan run trying to merge with other IBSS networks.
      Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      450aae3d