1. 14 1月, 2011 1 次提交
  2. 30 11月, 2010 1 次提交
  3. 07 10月, 2010 1 次提交
  4. 17 8月, 2010 1 次提交
    • C
      mac80211: AMPDU rx reorder timeout timer · 2bff8ebf
      Christian Lamparter 提交于
      This patch introduces a new timer, which will release
      queued-up MPDUs from the reorder buffer, whenever
      they've waited for more than HT_RX_REORDER_BUF_TIMEOUT
      (which is at around 100 ms).
      
      The advantage of having a dedicated timer, instead of
      relying on a constant stream of freshly arriving aMPDUs
      to release the old ones, is particularly observable when
      even a small fraction of MPDUs are forever lost at
      low network speeds.
      
      Previously under these circumstances frames would become
      stuck in the reorder buffer and the network stack of both
      HT peers throttled back, instead of revving up and
      gunning the pipes.
      Signed-off-by: NChristian Lamparter <chunkeey@googlemail.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      2bff8ebf
  5. 15 6月, 2010 5 次提交
  6. 20 4月, 2010 1 次提交
  7. 08 4月, 2010 3 次提交
  8. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo 提交于
      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: NTejun Heo <tj@kernel.org>
      Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  9. 22 12月, 2009 3 次提交
  10. 01 12月, 2009 1 次提交
    • J
      mac80211: fix two remote exploits · 4253119a
      Johannes Berg 提交于
      Lennert Buytenhek noticed a remotely triggerable problem
      in mac80211, which is due to some code shuffling I did
      that ended up changing the order in which things were
      done -- this was in
      
        commit d75636ef
        Author: Johannes Berg <johannes@sipsolutions.net>
        Date:   Tue Feb 10 21:25:53 2009 +0100
      
          mac80211: RX aggregation: clean up stop session
      
      The problem is that the BUG_ON moved before the various
      checks, and as such can be triggered.
      
      As the comment indicates, the BUG_ON can be removed since
      the ampdu_action callback must already exist when the
      state is OPERATIONAL.
      
      A similar code path leads to a WARN_ON in
      ieee80211_stop_tx_ba_session, which can also be removed.
      
      Cc: stable@kernel.org [2.6.29+]
      Cc: Lennert Buytenhek <buytenh@marvell.com>
      Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      4253119a
  11. 30 11月, 2009 1 次提交
  12. 19 11月, 2009 2 次提交
  13. 07 5月, 2009 2 次提交
    • J
      mac80211: Add a timeout for frames in the RX reorder buffer · 4d050f1d
      Jouni Malinen 提交于
      This patch allows skbs to be released from the RX reorder buffer in
      case they have been there for an unexpectedly long time without us
      having received the missing frames before them. Previously, these
      frames were only released when the reorder window moved and that could
      take very long time unless new frames were received constantly (e.g.,
      TCP connections could be killed more or less indefinitely).
      
      This situation should not happen very frequently, but it looks like
      there are some scenarious that trigger it for some reason. As such,
      this should be considered mostly a workaround to speed up recovery
      from unexpected siutation that could result in connections hanging for
      long periods of time.
      
      The changes here will only check for timeout situation when adding new
      RX frames to the reorder buffer. It does not handle all possible
      cases, but seems to help for most cases that could result from common
      network usage (e.g., TCP retrying at least couple of times). For more
      completely coverage, a timer could be used to periodically check
      whether there are any frames remaining in the reorder buffer if no new
      frames are received.
      Signed-off-by: NJouni Malinen <jouni.malinen@atheros.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      4d050f1d
    • J
      mac80211: add driver ops wrappers · 24487981
      Johannes Berg 提交于
      In order to later add tracing or verifications to the driver
      calls mac80211 makes, this patch adds static inline wrappers
      for all operations.
      
      All calls are now written as
      
      	drv_<op>(local, ...);
      
      instead of
      
      	local->ops-><op>(&local->hw, ...);
      
      Where necessary, the wrappers also do existence checking and
      return default values as appropriate.
      Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      24487981
  14. 28 3月, 2009 1 次提交
  15. 28 2月, 2009 1 次提交
    • J
      mac80211: split IBSS/managed code · 46900298
      Johannes Berg 提交于
      This patch splits out the ibss code and data from managed (station) mode.
      The reason to do this is to better separate the state machines, and have
      the code be contained better so it gets easier to determine what exactly
      a given change will affect, that in turn makes it easier to understand.
      
      This is quite some churn, especially because I split sdata->u.sta into
      sdata->u.mgd and sdata->u.ibss, but I think it's easier to maintain that
      way. I've also shuffled around some code -- null function sending is only
      applicable to managed interfaces so put that into that file, some other
      functions are needed from various places so put them into util, and also
      rearranged the prototypes in ieee80211_i.h accordingly.
      Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      46900298
  16. 14 2月, 2009 5 次提交