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* mac80211: add flag to indicate HW only Tx-agg setup supportArik Nemtsov2011-09-131-1/+2
| | | | | | | | | When this flag is set, Tx A-MPDU sessions will not be started by mac80211. This flag is required for devices that support Tx A-MPDU setup in hardware. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: Remove unnecessary OOM logging messagesJoe Perches2011-09-131-27/+8
| | | | | | | | | | | Removing unnecessary messages saves code and text. Site specific OOM messages are duplications of a generic MM out of memory message and aren't really useful, so just delete them. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* wireless: Introduce defines for BAR TID_INFO & MULTI_TID fieldsHelmut Schaa2011-08-221-1/+1
| | | | | | | While at it also fix the indention of the other IEEE80211_BAR_CTRL_ defines. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: Stop TX BA session if buf_size is zeroHelmut Schaa2011-08-081-11/+7
| | | | | | | | | | | | | | If we receive an ADDBA response with status code 0 and a buf_size of 0 we should stop the TX BA session as otherwise we'll end up queuing frames in ieee80211_tx_prep_agg forever instead of sending them out as non AMPDUs. This fixes a problem with AVM Fritz Stick N wireless devices where frames to this device are not transmitted anymore by mac80211. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds2011-05-201-21/+38
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
| * mac80211: sparse RCU annotationsJohannes Berg2011-05-161-15/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds sparse RCU annotations to most of mac80211, only the mesh code remains to be done. Due the the previous patches, the annotations are pretty simple. The only thing that this actually changes is removing the RCU usage of key->sta in debugfs since this pointer isn't actually an RCU-managed pointer (it only has a single assignment done before the key even goes live). As that is otherwise harmless, I decided to make it part of this patch. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: fix TX a-MPDU lockingJohannes Berg2011-05-161-6/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During my quest to make mac80211 not have any RCU warnings from sparse, I came across the a-MPDU code again and it wasn't quite clear why it isn't racy. So instead of assigning the tid_tx array with just the spinlock held in ieee80211_start_tx_ba_session use a separate temporary array protected only by the spinlock and protect all assignments to the "live" array by both the spinlock and the mutex so that other code is easily verified to be correct. Due to pointer assignment atomicity I don't think this is a real issue, but I'm not sure, especially on Alpha the current code might be problematic. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | net,rcu: convert call_rcu(kfree_tid_tx) to kfree_rcu()Lai Jiangshan2011-05-071-11/+3
|/ | | | | | | | | | | | The rcu callback kfree_tid_tx() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(kfree_tid_tx). Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Johannes Berg <johannes@sipsolutions.net> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Acked-by: "David S. Miller" <davem@davemloft.net>
* mac80211: allow advertising correct maximum aggregate sizeJohannes Berg2011-01-191-1/+2
| | | | | | | | | | | | | | | | Currently, mac80211 always advertises that it may send up to 64 subframes in an aggregate. This is fine, since it's the max, but might as well be set to zero instead since it doesn't have any information. However, drivers might have that information, so allow them to set a variable giving it, which will then be used. The default of zero will be fine since to the peer that means we don't know and it will just use its own limit for the buffer size. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: track receiver's aggregation reorder buffer sizeJohannes Berg2011-01-191-3/+17
| | | | | | | | | | | | | | | | | | | | | | | The aggregation code currently doesn't implement the buffer size negotiation. It will always request a max buffer size (which is fine, if a little pointless, as the mac80211 code doesn't know and might just use 0 instead), but if the peer requests a smaller size it isn't possible to honour this request. In order to fix this, look at the buffer size in the addBA response frame, keep track of it and pass it to the driver in the ampdu_action callback when called with the IEEE80211_AMPDU_TX_OPERATIONAL action. That way the driver can limit the number of subframes in aggregates appropriately. Note that this doesn't fix any drivers apart from the addition of the new argument -- they all need to be updated separately to use this variable! Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: Add timeout to BA session start APISujith Manoharan2010-12-151-2/+5
| | | | | | | | | | | | | Allow drivers or rate control algorithms to specify BlockAck session timeout when initiating an ADDBA transaction. This is useful in cases where maintaining persistent BA sessions does not incur any overhead. The current timeout value of 5000 TUs is retained for all non ath9k/ath9k_htc drivers. Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: avoid transmitting delBA to old APJohannes Berg2010-10-061-5/+9
| | | | | | | | | | | | | | | | | When roaming while we have active BA session, we can end up transmitting delBA frames to the old AP while we're already on the new AP's channel, which can cause warnings. Simply avoid sending those frames, but still tear down the internal session state, since they are not really necessary anyway as we will implicitly disassociate when sending the association to the new AP. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: delete AddBA response timerJohannes Berg2010-10-061-0/+2
| | | | | | | | | | | | | | | | | | | | | | | We never delete the addBA response timer, which is typically fine, but if the station it belongs to is deleted very quickly after starting the BA session, before the peer had a chance to reply, the timer may fire after the station struct has been freed already. Therefore, we need to delete the timer in a suitable spot -- best when the session is being stopped (which will happen even then) in which case the delete will be a no-op most of the time. I've reproduced the scenario and tested the fix. This fixes the crash reported at http://mid.gmane.org/4CAB6F96.6090701@candelatech.com Cc: stable@kernel.org Reported-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: update aggregation documentationJohannes Berg2010-06-141-16/+27
| | | | | | | | | Even before the recent changes, the documentation for TX aggregation was somewhat out of date. Update it and also add documentation for the RX side. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: change TX aggregation lockingJohannes Berg2010-06-141-41/+53
| | | | | | | | | | | | | To prepare for allowing drivers to sleep in ampdu_action, change the locking in the TX aggregation code to use the mutex the RX part already uses. The spinlock is still necessary around some code to avoid races with TX, but now we can also synchronize_net() to avoid getting an inconsistent sequence number. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: defer TX agg session teardown to workJohannes Berg2010-06-141-5/+5
| | | | | | | | | | | | | Since we want the code to be able to sleep in the future, it must not be called from the timer directly. To achieve that, simply call the function drivers would call, and also use RCU in the timer to get the struct so we don't need to rely on the spinlock in the future. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: move BA session workJohannes Berg2010-06-141-36/+3
| | | | | | | | | Move the block-ack session works into common code, since it will be needed for RX agg too in the next patches. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: make TX aggregation start/stop request asyncJohannes Berg2010-06-141-52/+125
| | | | | | | | | | | | | | | | | When the driver or rate control requests starting or stopping an aggregation session, that currently causes a direct callback into the driver, which could potentially cause locking problems. Also, the functions need to be callable from contexts that cannot sleep, and thus will interfere with making the ampdu_action callback sleeping. To address these issues, add a new work item for each station that will process any start or stop requests out of line. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: refcount aggregation queue stopJohannes Berg2010-06-141-30/+47
| | | | | | | | | | | | | | | mac80211 currently maintains the ampdu_lock to avoid starting a queue due to one aggregation session while another aggregation session needs the queue stopped. We can do better, however, and instead refcount the queue stops for this particular purpose, thus removing the need for the lock. This will help making ampdu_action able to sleep. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: remove non-irqsafe aggregation callbacksJohannes Berg2010-06-141-2/+0
| | | | | | | | | | | | | The non-irqsafe aggregation start/stop done callbacks are currently only used by ath9k_htc, and can cause callbacks into the driver again. This might lead to locking issues, which will only get worse as we modify locking. To avoid trouble, remove the non-irqsafe versions and change ath9k_htc to use those instead. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: use RCU for TX aggregationJohannes Berg2010-06-141-112/+117
| | | | | | | | | | | | | Currently we allocate some memory for each TX aggregation session and additionally keep a state bitmap indicating the state it is in. By using RCU to protect the pointer, moving the state into the structure and some locking trickery we can avoid locking when the TX agg session is fully operational. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: move aggregation callback processingJohannes Berg2010-06-141-8/+6
| | | | | | | | | | | | | | | | | This moves the aggregation callback processing to the per-sdata skb queue and a work function rather than the tasklet. Unfortunately, this means that it extends the pkt_type hack to that skb queue. However, it will enable making ampdu_action API changes gradually, my current plan is to get rid of this again by forcing drivers to only return from ampdu_action() when everything is done, thus removing the callbacks completely. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: simplify station/aggregation codeJohannes Berg2010-06-141-9/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A number of places use RCU locking for accessing the station list, even though they do not need to. Use mutex locking instead to prepare for the locking changes I want to make. The mlme code is also using a WLAN_STA_DISASSOC flag that has the same meaning as WLAN_STA_BLOCK_BA, so use that. While doing so, combine places where we loop over stations twice, and optimise away some of the loops by checking if the hardware supports aggregation at all first. Also fix a more theoretical race condition: right now we could resume, set up an aggregation session, and right after tear it down again due to the code that is needed for hardware reconfiguration here. Also mark add a comment to that code marking it as a workaround. Finally, remove a pointless aggregation disabling loop when an interface is stopped, directly after that we remove all stations from it which will also disable all aggregation sessions that may still be active, and does so in a race-free way unlike the current loop that doesn't block new sessions. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge branch 'master' of ↵John W. Linville2010-06-071-2/+4
|\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-core.h
| * mac80211: fix dialog token allocatorJohannes Berg2010-06-011-2/+4
| | | | | | | | | | | | | | | | | | The dialog token allocator has apparently been broken since b83f4e15 ("mac80211: fix deadlock in sta->lock") because it got moved out under the spinlock. Fix it. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: clean up ieee80211_stop_tx_ba_sessionJohannes Berg2010-06-031-4/+3
|/ | | | | | | | | | | | | | There's no sense in letting anything but internal mac80211 functions set the initiator to anything but WLAN_BACK_INITIATOR, since WLAN_BACK_RECIPIENT is only valid when we have received a frame from the peer, which we react to directly in mac80211. The debugfs code I recently added got this wrong as well. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge branch 'master' into for-davemJohn W. Linville2010-04-231-1/+1
|\ | | | | | | | | | | | | Conflicts: drivers/net/wireless/ath/ath9k/phy.c drivers/net/wireless/iwlwifi/iwl-6000.c drivers/net/wireless/iwlwifi/iwl-debugfs.c
| * mac80211: add missing newlineJohannes Berg2010-04-191-1/+1
| | | | | | | | | | | | | | | | One HT debugging printk is missing a newline, add it. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵David S. Miller2010-04-211-1/+0
|\ \ | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-6000.c net/core/dev.c
| * \ Merge branch 'master' of ↵David S. Miller2010-04-201-1/+0
| |\ \ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
| | * | mac80211: remove bogus TX agg state assignmentJohannes Berg2010-04-191-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the addba timer expires but has no work to do, it should not affect the state machine. If it does, TX will not see the successfully established and we can also crash trying to re-establish the session. Cc: stable@kernel.org [2.6.32, 2.6.33] Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | | | Merge branch 'master' of ↵John W. Linville2010-04-151-3/+11
|\ \ \ \ | |/ / / |/| | / | | |/ | |/| | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem Conflicts: Documentation/feature-removal-schedule.txt drivers/net/wireless/ath/ath5k/phy.c drivers/net/wireless/wl12xx/wl1271_main.c
| * | mac80211: enhance tracingJohannes Berg2010-04-081-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enhance tracing by adding tracing for a variety of callbacks that the drivers call, and also for internal calls (currently limited to queue status). This can aid debugging what is going on in mac80211 in interaction with drivers, since we can now see what drivers call and not just what mac80211 calls in the driver. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | mac80211: rename WLAN_STA_SUSPEND to WLAN_STA_BLOCK_BAJohannes Berg2010-04-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | I want to use it during station destruction as well so rename it to WLAN_STA_BLOCK_BA which is also the only use of it now. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | wireless: remove trailing space in messagesFrans Pop2010-03-311-2/+2
| |/ | | | | | | | | | | | | Also correct indentation in net/wireless/reg.c. Signed-off-by: Frans Pop <elendil@planet.nl> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* mac80211: Deny TX BA session requests during disassociationSujith2010-02-101-0/+8
| | | | | | | | | | | | In associated state, when bringing an interface down, existing BA sessions are torn down. When this is in progress, nothing prevents mac80211 from accepting another BA session start request. Use a new station flag to fix this. Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: quit addba_resp_timer if Tx BA session is torn downZhu Yi2010-01-121-1/+2
| | | | | | | | | | | | Make addba_resp_timer aware the HT_AGG_STATE_REQ_STOP_BA_MSK mask so that when ___ieee80211_stop_tx_ba_session() is issued the timer will quit. Otherwise when suspend happens before the timer expired, the timer handler will be called immediately after resume and messes up driver status. Signed-off-by: Zhu Yi <yi.zhu@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: fix ampdu_action tx_start ssnChristian Lamparter2010-01-051-1/+1
| | | | | | | | | | | | The start_seq_num is taken from the station's tid_seq[tid]. This is fine, except tid_seq sequence counter is shifted by 4 bits to accommodate for frame fragmentation. Both (iwlagn & ath9k) were unaffected by this minor glitch, because they don't read the *ssn for the AMPDU_TX_START action. Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: trace interface nameJohannes Berg2009-12-211-4/+3
| | | | | | | | It's not all that useful to have the vif/sdata pointer, we'd rather refer to the interfaces by their name. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: reduce reliance on netdevJohannes Berg2009-12-211-7/+7
| | | | | | | | | | | | | | | | | | | 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: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* mac80211: make station management completely depend on vifJohannes Berg2009-12-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | 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: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Merge branch 'master' of ↵David S. Miller2009-12-011-9/+8
|\ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/mac80211/ht.c
| * mac80211: fix spurious delBA handlingJohannes Berg2009-11-301-8/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lennert Buytenhek noticed that delBA handling in mac80211 was broken and has remotely triggerable problems, some of which are due to some code shuffling I did that ended up changing the order in which things were done -- this was commit d75636ef9c1af224f1097941879d5a8db7cd04e5 Author: Johannes Berg <johannes@sipsolutions.net> Date: Tue Feb 10 21:25:53 2009 +0100 mac80211: RX aggregation: clean up stop session and other parts were already present in the original commit d92684e66091c0f0101819619b315b4bb8b5bcc5 Author: Ron Rindjunsky <ron.rindjunsky@intel.com> Date: Mon Jan 28 14:07:22 2008 +0200 mac80211: A-MPDU Tx add delBA from recipient support The first problem is that I moved a BUG_ON before various checks -- thereby making it possible to hit. As the comment indicates, the BUG_ON can be removed since the ampdu_action callback must already exist when the state is != IDLE. The second problem isn't easily exploitable but there's a race condition due to unconditionally setting the state to OPERATIONAL when a delBA frame is received, even when no aggregation session was ever initiated. All the drivers accept stopping the session even then, but that opens a race window where crashes could happen before the driver accepts it. Right now, a WARN_ON may happen with non-HT drivers, while the race opens only for HT drivers. For this case, there are two things necessary to fix it: 1) don't process spurious delBA frames, and be more careful about the session state; don't drop the lock 2) HT drivers need to be prepared to handle a session stop even before the session was really started -- this is true for all drivers (that support aggregation) but iwlwifi which can be fixed easily. The other HT drivers (ath9k and ar9170) are behaving properly already. Reported-by: Lennert Buytenhek <buytenh@marvell.com> Cc: stable@kernel.org Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * mac80211: fix two remote exploitsJohannes Berg2009-11-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 d75636ef9c1af224f1097941879d5a8db7cd04e5 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: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | Merge branch 'master' of ↵David S. Miller2009-11-291-10/+8
|\ \ | |/ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/ieee802154/fakehard.c drivers/net/e1000e/ich8lan.c drivers/net/e1000e/phy.c drivers/net/netxen/netxen_nic_init.c drivers/net/wireless/ath/ath9k/main.c
| * mac80211: fix addba timer (again...)Johannes Berg2009-11-181-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 2171abc58644e09dbba546d91366b12743115396 Author: Johannes Berg <johannes@sipsolutions.net> Date: Thu Oct 29 08:34:00 2009 +0100 mac80211: fix addba timer left a problem in there, even if the timer was never started it could be deleted and then added. Linus pointed out that del_timer_sync() isn't actually needed if we make the timer able to deal with no longer being needed when it gets queued _while_ we're in the locked section that also deletes it. For that the timer function only needs to check the HT_ADDBA_RECEIVED_MSK bit as well as the HT_ADDBA_REQUESTED_MSK bit, only if the former is clear should it do anything. Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: remove encrypt parameter from ieee80211_tx_skbJohannes Berg2009-11-181-2/+3
| | | | | | | | | | | | | | | | | | | | Since the flags moved into skb->cb, there's no longer a need to have the encrypt bool passed into the function, anyone who requires it set to 0 (false) can just set the flag directly. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: Fix panic in aggregation handlingSujith2009-11-181-0/+2
| | | | | | | | | | | | | | | | Not assigning the vif pointer causes an oops. This patch fixes it. Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: convert aggregation to operate on vifs/stasJohannes Berg2009-11-181-58/+38
|/ | | | | | | | | | | | The entire aggregation code currently operates on the hw pointer and station addresses, but that needs to change to make stations purely per-vif; As one step preparing for that make the aggregation code callable with the station, or by the combination of virtual interface and station address. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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