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* | mac80211: add separate last_ack variableJohannes Berg2016-04-064-9/+24
| | | | | | | | | | | | | | | | | | | | | | Instead of touching the rx_stats.last_rx from the status path, introduce and use a status_stats.last_ack variable. This will make rx_stats.last_rx indicate when the last frame was received, making it available for real "last_rx" and statistics gathering; statistics, when done per-CPU, will need to figure out which place was updated last for those items where the "last" value is exposed. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: remove rx_stats.last_rx update after sta allocJohannes Berg2016-04-062-6/+0
| | | | | | | | | | | | | | There's no need to update rx_stats.last_rx after allocating a station since it's already updated during allocation. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: move averaged values out of rx_statsJohannes Berg2016-04-064-10/+12
| | | | | | | | | | | | | | | | | | Move the averaged values out of rx_stats and into rx_stats_avg, to cleanly split them out. The averaged ones cannot be supported for parallel RX in a per-CPU fashion, while the other values can be collected per CPU and then combined/selected when needed. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: move semicolon out of CALL_RXH macroJohannes Berg2016-04-061-17/+17
| | | | | | | | | | | | | | Move the semicolon, people typically assume that and once line already put a semicolon behind the "call". Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: count MSDUs in A-MSDU properlyJohannes Berg2016-04-061-9/+9
| | | | | | | | | | | | | | | | | | | | For the RX MSDU statistics, we need to count the number of MSDUs created and accepted from an A-MSDU. Right now, all frames in any A-MSDUs were completely ignored. Fix this by moving the RX MSDU statistics accounting into the deliver function. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: allow passing transmitter station on RXJohannes Berg2016-04-061-5/+13
| | | | | | | | | | | | | | | | | | Sometimes drivers already looked up, or know out-of-band from their device, which station transmitted a given RX frame. Allow them to pass the station pointer to mac80211 to save the extra lookup. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: flush paths outside of plink lockBob Copeland2016-04-051-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lockdep warned of a lock dependency between the mesh_plink lock and the internal lock for the rhashtable. The problem is that the rhashtable code uses a spin lock with softirqs enabled, while mesh_plink_timer executes a walk (to flush paths on a state change) inside a softirq with the plink lock held. This leads to the following deadlock if the timer fires while rht lock is held on this CPU, and plink lock is held on another CPU: CPU0 CPU1 ---- ---- lock(&(&ht->lock)->rlock); local_irq_disable(); lock(&(&sta->mesh->plink_lock)->rlock); lock(&(&ht->lock)->rlock); <Interrupt> lock(&(&sta->mesh->plink_lock)->rlock); *** DEADLOCK *** Fix by waiting until we drop the plink lock to flush paths. Fixes: d48a1b7cd439 ("mac80211: mesh: convert path table to rhashtable") Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: fix cleanup for mesh pathtableBob Copeland2016-04-053-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mesh path table needs to be around for the entire time the interface is in mesh mode, as users can perform an mpath dump at any time. The existing path table lifetime is instead tied to the mesh BSS which can cause crashes when different MBSSes are joined in the context of a single interface, or when the path table is dumped when no MBSS is joined. Introduce a new function to perform the final teardown of the interface and perform path table cleanup there. We already free the individual path elements when the leaving the mesh so no additional cleanup is needed there. This fixes the following crash: [ 47.753026] BUG: unable to handle kernel paging request at fffffff0 [ 47.753026] IP: [<c0239765>] kthread_data+0xa/0xe [ 47.753026] *pde = 00741067 *pte = 00000000 [ 47.753026] Oops: 0000 [#4] PREEMPT [ 47.753026] Modules linked in: ppp_generic slhc 8021q garp mrp sch_fq_codel iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat ip_tables ath9k_htc ath5k 8139too ath10k_pci ath10k_core arc4 ath9k ath9k_common ath9k_hw mac80211 ath cfg80211 cpufreq_powersave br_netfilter bridge stp llc ipw usb_wwan sierra_net usbnet af_alg natsemi via_rhine mii iTCO_wdt iTCO_vendor_support gpio_ich sierra coretemp pcspkr i2c_i801 lpc_ich ata_generic ata_piix libata ide_pci_generic piix e1000e igb i2c_algo_bit ptp pps_core [last unloaded: 8139too] [ 47.753026] CPU: 0 PID: 12 Comm: kworker/u2:1 Tainted: G D W 4.5.0-wt-V3 #6 [ 47.753026] Hardware name: To Be Filled By O.E.M./To be filled by O.E.M., BIOS 080016 11/07/2014 [ 47.753026] task: f645a0c0 ti: f6462000 task.ti: f6462000 [ 47.753026] EIP: 0060:[<c0239765>] EFLAGS: 00010002 CPU: 0 [ 47.753026] EIP is at kthread_data+0xa/0xe [ 47.753026] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 [ 47.753026] ESI: f645a0c0 EDI: f645a2fc EBP: f6463a80 ESP: f6463a78 [ 47.753026] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 [ 47.753026] CR0: 8005003b CR2: 00000014 CR3: 353e5000 CR4: 00000690 [ 47.753026] Stack: [ 47.753026] c0236866 00000000 f6463aac c05768b4 00000009 f6463ba8 f6463ab0 c0247010 [ 47.753026] 00000000 f645a0c0 f6464000 00000009 f6463ba8 f6463ab8 c0576eb2 f645a0c0 [ 47.753026] f6463aec c0228be4 c06335a4 f6463adc f6463ad0 c06c06d4 f6463ae4 c02471b0 [ 47.753026] Call Trace: [ 47.753026] [<c0236866>] ? wq_worker_sleeping+0xb/0x78 [ 47.753026] [<c05768b4>] __schedule+0xda/0x587 [ 47.753026] [<c0247010>] ? vprintk_default+0x12/0x14 [ 47.753026] [<c0576eb2>] schedule+0x72/0x89 [ 47.753026] [<c0228be4>] do_exit+0xb8/0x71d [ 47.753026] [<c02471b0>] ? kmsg_dump+0xa9/0xae [ 47.753026] [<c0203576>] oops_end+0x69/0x70 [ 47.753026] [<c021dcdb>] no_context+0x1bb/0x1c5 [ 47.753026] [<c021de1b>] __bad_area_nosemaphore+0x136/0x140 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021de32>] bad_area_nosemaphore+0xd/0x10 [ 47.753026] [<c021e0a1>] __do_page_fault+0x26c/0x320 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021e2fa>] do_page_fault+0xb/0xd [ 47.753026] [<c05798f8>] error_code+0x58/0x60 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c0239765>] ? kthread_data+0xa/0xe [ 47.753026] [<c0236866>] ? wq_worker_sleeping+0xb/0x78 [ 47.753026] [<c05768b4>] __schedule+0xda/0x587 [ 47.753026] [<c0247010>] ? vprintk_default+0x12/0x14 [ 47.753026] [<c0576eb2>] schedule+0x72/0x89 [ 47.753026] [<c0228be4>] do_exit+0xb8/0x71d [ 47.753026] [<c02471b0>] ? kmsg_dump+0xa9/0xae [ 47.753026] [<c0203576>] oops_end+0x69/0x70 [ 47.753026] [<c021dcdb>] no_context+0x1bb/0x1c5 [ 47.753026] [<c021de1b>] __bad_area_nosemaphore+0x136/0x140 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021de32>] bad_area_nosemaphore+0xd/0x10 [ 47.753026] [<c021e0a1>] __do_page_fault+0x26c/0x320 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021e2fa>] do_page_fault+0xb/0xd [ 47.753026] [<c05798f8>] error_code+0x58/0x60 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c0239765>] ? kthread_data+0xa/0xe [ 47.753026] [<c0236866>] ? wq_worker_sleeping+0xb/0x78 [ 47.753026] [<c05768b4>] __schedule+0xda/0x587 [ 47.753026] [<c0391e32>] ? put_io_context_active+0x6d/0x95 [ 47.753026] [<c0576eb2>] schedule+0x72/0x89 [ 47.753026] [<c02291f8>] do_exit+0x6cc/0x71d [ 47.753026] [<c0203576>] oops_end+0x69/0x70 [ 47.753026] [<c021dcdb>] no_context+0x1bb/0x1c5 [ 47.753026] [<c021de1b>] __bad_area_nosemaphore+0x136/0x140 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021de32>] bad_area_nosemaphore+0xd/0x10 [ 47.753026] [<c021e0a1>] __do_page_fault+0x26c/0x320 [ 47.753026] [<c03b9160>] ? debug_smp_processor_id+0x12/0x16 [ 47.753026] [<c02015e2>] ? __switch_to+0x24/0x40e [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c021e2fa>] do_page_fault+0xb/0xd [ 47.753026] [<c05798f8>] error_code+0x58/0x60 [ 47.753026] [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a [ 47.753026] [<c03b59d2>] ? rhashtable_walk_init+0x5c/0x93 [ 47.753026] [<f9843221>] mesh_path_tbl_expire.isra.24+0x19/0x82 [mac80211] [ 47.753026] [<f984408b>] mesh_path_expire+0x11/0x1f [mac80211] [ 47.753026] [<f9842bb7>] ieee80211_mesh_work+0x73/0x1a9 [mac80211] [ 47.753026] [<f98207d1>] ieee80211_iface_work+0x2ff/0x311 [mac80211] [ 47.753026] [<c0235fa3>] process_one_work+0x14b/0x24e [ 47.753026] [<c0236313>] worker_thread+0x249/0x343 [ 47.753026] [<c02360ca>] ? process_scheduled_works+0x24/0x24 [ 47.753026] [<c0239359>] kthread+0x9e/0xa3 [ 47.753026] [<c0578e50>] ret_from_kernel_thread+0x20/0x40 [ 47.753026] [<c02392bb>] ? kthread_parkme+0x18/0x18 [ 47.753026] Code: 6b c0 85 c0 75 05 e8 fb 74 fc ff 89 f8 84 c0 75 08 8d 45 e8 e8 34 dd 33 00 83 c4 28 5b 5e 5f 5d c3 55 8b 80 10 02 00 00 89 e5 5d <8b> 40 f0 c3 55 b9 04 00 00 00 89 e5 52 8b 90 10 02 00 00 8d 45 [ 47.753026] EIP: [<c0239765>] kthread_data+0xa/0xe SS:ESP 0068:f6463a78 [ 47.753026] CR2: 00000000fffffff0 [ 47.753026] ---[ end trace 867ca0bdd0767790 ]--- Fixes: 3b302ada7f0a ("mac80211: mesh: move path tables into if_mesh") Reported-by: Fred Veldini <fred.veldini@gmail.com> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: fix mesh path kerneldocBob Copeland2016-04-051-8/+12
| | | | | | | | | | | | | | | | | | | | | | Several of the mesh path fields are undocumented and some of the documentation is no longer correct or relevant after the switch to rhashtable. Clean up the kernel doc accordingly and reorder some fields to match the structure layout. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: reorder structure membersBob Copeland2016-04-051-3/+2
| | | | | | | | | | | | | | | | Reduce padding waste in struct mesh_table and struct rmc_entry by moving the smaller fields to the end. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: embed gates hlist head directlyBob Copeland2016-04-052-15/+5
| | | | | | | | | | | | | | | | | | | | | | Since we have converted the mesh path tables to rhashtable, we are no longer swapping out the entire mesh_pathtbl pointer with RCU. As a result, we no longer need indirection to the hlist head for the gates list and can simply embed it, saving a pair of pointer-sized allocations. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: use hlist for rmc cacheBob Copeland2016-04-052-10/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | The RMC cache has 256 list heads plus a u32, which puts it at the unfortunate size of 4104 bytes with padding. kmalloc() will then round this up to the next power-of-two, so we wind up actually using two pages here where most of the second is wasted. Switch to hlist heads here to reduce the structure size down to fit within a page. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: handle failed alloc for rmc cacheBob Copeland2016-04-051-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In the unlikely case that mesh_rmc_init() fails with -ENOMEM, the rmc pointer will be left as NULL but the interface is still operational because ieee80211_mesh_init_sdata() is not allowed to fail. If this happens, we would blindly dereference rmc when checking whether a multicast frame is in the cache. Instead just drop the frames in the forwarding path. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: fix crash in mesh_path_timerBob Copeland2016-04-053-15/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mesh_path_reclaim() function, called from an rcu callback, cancels the mesh_path_timer associated with a mesh path. Unfortunately, this call can happen much later, perhaps after the hash table itself is destroyed. Such a situation led to the following crash in mesh_path_send_to_gates() when dereferencing the tbl pointer: [ 23.901661] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 23.905516] IP: [<ffffffff814c910b>] mesh_path_send_to_gates+0x2b/0x740 [ 23.908757] PGD 99ca067 PUD 99c4067 PMD 0 [ 23.910789] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 23.913485] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc6-wt+ #43 [ 23.916675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 23.920471] task: ffffffff81685500 ti: ffffffff81678000 task.ti: ffffffff81678000 [ 23.922619] RIP: 0010:[<ffffffff814c910b>] [<ffffffff814c910b>] mesh_path_send_to_gates+0x2b/0x740 [ 23.925237] RSP: 0018:ffff88000b403d30 EFLAGS: 00010286 [ 23.926739] RAX: 0000000000000000 RBX: ffff880009bc0d20 RCX: 0000000000000102 [ 23.928796] RDX: 000000000000002e RSI: 0000000000000001 RDI: ffff880009bc0d20 [ 23.930895] RBP: ffff88000b403e18 R08: 0000000000000001 R09: 0000000000000001 [ 23.932917] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880009c20940 [ 23.936370] R13: ffff880009bc0e70 R14: ffff880009c21c40 R15: ffff880009bc0d20 [ 23.939823] FS: 0000000000000000(0000) GS:ffff88000b400000(0000) knlGS:0000000000000000 [ 23.943688] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 23.946429] CR2: 0000000000000008 CR3: 00000000099c5000 CR4: 00000000000006b0 [ 23.949861] Stack: [ 23.950840] 000000000000002e ffff880009c20940 ffff88000b403da8 ffffffff8109e551 [ 23.954467] ffffffff82711be2 000000000000002e 0000000000000000 ffffffff8166a5f5 [ 23.958141] 0000000000685ce8 0000000000000246 ffff880009bc0d20 ffff880009c20940 [ 23.961801] Call Trace: [ 23.962987] <IRQ> [ 23.963963] [<ffffffff8109e551>] ? vprintk_emit+0x351/0x5e0 [ 23.966782] [<ffffffff8109e8ff>] ? vprintk_default+0x1f/0x30 [ 23.969529] [<ffffffff810ffa41>] ? printk+0x48/0x50 [ 23.971956] [<ffffffff814ceef3>] mesh_path_timer+0x133/0x160 [ 23.974707] [<ffffffff814cedc0>] ? mesh_nexthop_resolve+0x230/0x230 [ 23.977775] [<ffffffff810b04ee>] call_timer_fn+0xce/0x330 [ 23.980448] [<ffffffff810b0425>] ? call_timer_fn+0x5/0x330 [ 23.983126] [<ffffffff814cedc0>] ? mesh_nexthop_resolve+0x230/0x230 [ 23.986091] [<ffffffff810b097c>] run_timer_softirq+0x22c/0x390 Instead of cancelling in the RCU callback, set a new flag to prevent the timer from being rearmed, and then cancel the timer synchronously when freeing the mesh path. This leaves mesh_path_reclaim() doing nothing but kfree, so switch to kfree_rcu(). Fixes: 3b302ada7f0a ("mac80211: mesh: move path tables into if_mesh") Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: track and tell driver about GO client P2P PS abilitiesAyala Beker2016-04-052-0/+33
| | | | | | | | | | | | | | | | | | | | Legacy clients don't support P2P power save mechanism, and thus if a P2P GO has a legacy client connected to it, it should disable P2P PS mechanisms. Let the driver know about this with a new bss_conf parameter. Signed-off-by: Ayala Beker <ayala.beker@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: avoid useless memory write on each frame RXJohannes Berg2016-04-051-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | In the likely case that probe_count is 0, don't write to the memory there. Also use ifmgd consistently in the function, instead of using sdata->u.mgd as well. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: fix cipher scheme function nameJohannes Berg2016-04-051-4/+4
| | | | | | | | | | | | | | The code is only used with iwlwifi, but still should have proper mac80211 naming scheme; fix that. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: clean up station flags debugfsJohannes Berg2016-04-052-20/+47
| | | | | | | | | | | | | | Avoid the really strange %s%s%s expression, use an array of flag names and check that all flags are present. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: don't start dynamic PS timer if not neededJohannes Berg2016-04-051-5/+5
| | | | | | | | | | | | | | | | | | If the device implements dynamic PS itself, there's no need to ever start the dynamic powersave timer on RX. While at it, fix up some indentation in this code. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: remove sta_info debugfs sub-structJohannes Berg2016-04-053-17/+15
| | | | | | | | | | | | | | Since the previous patch, the struct only has a single member, so remove the struct and leave just the single member. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: Remove unused variable in per STA debugfs structMohammed Shafi Shajakhan2016-04-052-3/+0
| | | | | | | | | | | | | | | | | | Remove unused variable in per STA debugfs structure, 'commit 34e895075e21 ("mac80211: allow station add/remove to sleep")' removed the only user of 'add_has_run'. Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: enable starting BA session with custom timeoutSara Sharon2016-04-051-17/+30
| | | | | | | | | | | | | | | | | | | | | | Currently the debugfs entry for starting aggregation session starts it with timeout of 5 seconds. Allow opening a session with a custom timeout (according to spec 0 is no timeout). while at it, refactor the function and remove the magic numbers. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: add NETIF_F_RXCSUM to features white listSara Sharon2016-04-051-1/+1
| | | | | | | | | | | | | | | | | | | | NETIF_F_RXCSUM is not in the white list, though some drivers may want to set it in order to enable seeing the actual RX checksum status in ethtool. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: Set global RRM capabilityEmmanuel Grumbach2016-04-051-0/+2
| | | | | | | | | | | | | | | | Allow publishing RRM capabilities for features that are not HW dependent. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: minstrel_ht: improve sample rate skip logicFelix Fietkau2016-04-051-7/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were a few issues that were slowing down the process of finding the optimal rate, especially on devices with multi-rate retry limitations: When max_tp_rate[0] was slower than max_tp_rate[1], the code did not sample max_tp_rate[1], which would often allow it to switch places with max_tp_rate[0] (e.g. if only the first sampling attempts were bad, but the rate is otherwise good). Also, sample attempts of rates between max_tp_rate[0] and [1] were being ignored in this case, because the code only checked if the rate was slower than [1]. Fix this by checking against the fastest / second fastest max_tp_rate instead of assuming a specific order between the two. In my tests this patch significantly reduces the time until minstrel_ht finds the optimal rate right after assoc Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: do not pass injected frames without a valid rate to the driverFelix Fietkau2016-04-051-0/+3
| | | | | | | | | | | | | | | | Fall back to rate control if the requested bitrate was not found. Fixes: dfdfc2beb0dd ("mac80211: Parse legacy and HT rate in injected frames") Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: fix parsing of 40Mhz in injected radiotap headerSven Eckelmann2016-04-051-2/+3
| | | | | | | | | | | | | | | | | | | | | | The MCS bandwidth part of the radiotap header is 2 bits wide. The full 2 bit have to compared against IEEE80211_RADIOTAP_MCS_BW_40 and not only if the first bit is set. Otherwise IEEE80211_RADIOTAP_MCS_BW_40 can be confused with IEEE80211_RADIOTAP_MCS_BW_20U. Fixes: dfdfc2beb0dd ("mac80211: Parse legacy and HT rate in injected frames") Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: synchronize driver rx queues before removing a stationSara Sharon2016-04-053-1/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some devices, like iwlwifi, have RSS queues. This may cause a situation where a disassociation is handled in control path and results in station removal while there are prior RX frames that were still not processed in other queues. When they will be processed the station will be gone, and the frames will be dropped. Add a synchronization interface to avoid that. When driver returns from the synchronization mac80211 may remove the station. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: convert path table to rhashtableBob Copeland2016-04-054-575/+259
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In the time since the mesh path table was implemented as an RCU-traversable, dynamically growing hash table, a generic RCU hashtable implementation was added to the kernel. Switch the mesh path table over to rhashtable to remove some code and also gain some features like automatic shrinking. Cc: Thomas Graf <tgraf@suug.ch> Cc: netdev@vger.kernel.org Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: embed known gates list in struct mesh_pathBob Copeland2016-04-052-56/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mesh path table uses a struct mesh_node in its hlists in order to support a resizable hash table: the mesh_node provides an indirection to the actual mesh path so that two different bucket lists can point to the same path entry. However, for the known gates list, we don't need this indirection because there is ever only one list. So we can just embed the hlist_node in the mesh path itself, which simplifies things a bit and saves a linear search whenever we need to find an item in the list. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: factor out common mesh path allocation codeBob Copeland2016-04-051-23/+28
| | | | | | | | | | | | | | | | Remove duplicate code to allocate and initialize a mesh path or mesh proxy path. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: don't hash sdata in mpath tablesBob Copeland2016-04-051-10/+8
| | | | | | | | | | | | | | | | Now that the sdata pointer is the same for all entries of a path table, hashing it is pointless, so hash only the address. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh: move path tables into if_meshBob Copeland2016-04-056-115/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The mesh path and mesh gate hashtables are global, containing all of the mpaths for every mesh interface, but the paths are all tied logically to a single interface. The common case is just a single mesh interface, so optimize for that by moving the global hashtable into the per-interface struct. Doing so allows us to drop sdata pointer comparisons inside the lookups and also saves a few bytes of BSS and data. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: Support a scan request for a specific BSSIDJouni Malinen2016-04-051-1/+3
| | | | | | | | | | | | | | | | If the cfg80211 scan trigger operation specifies a single BSSID, use that value instead of the wildcard BSSID in the Probe Request frames. Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: allow not sending MIC up from driver for HW cryptoSara Sharon2016-04-052-14/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When HW crypto is used, there's no need for the CCMP/GCMP MIC to be available to mac80211, and the hardware might have removed it already after checking. The MIC is also useless to have when the frame is already decrypted, so allow indicating that it's not present. Since we are running out of bits in mac80211_rx_flags, make the flags field a u64. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: allow drivers to report CLOCK_BOOTTIME for scan resultsJohannes Berg2016-04-051-1/+3
| | | | | | | | | | | | | | | | This was requested by Android, and the appropriate cfg80211 API had been added by Dmitry. Support it in mac80211, allowing drivers to provide the timestamp. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: parse VHT info in injected framesLorenzo Bianconi2016-04-051-0/+31
|/ | | | | | | | | Add VHT radiotap parsing support to ieee80211_parse_tx_radiotap(). That capability has been tested using a d-link dir-860l rev b1 running OpenWrt trunk and mt76 driver Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-03-085-19/+40
|\ | | | | | | | | | | | | | | Several cases of overlapping changes, as well as one instance (vxlan) of a bug fix in 'net' overlapping with code movement in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * Merge tag 'mac80211-for-davem-2016-03-02' of ↵David S. Miller2016-03-023-11/+30
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Here are a few more fixes for the current cycle: * check GCMP encryption vs. fragmentation properly; we'd found this problem quite a while ago but waited for the 802.11 spec to be updated * fix RTS/CTS logic in minstrel_ht * fix RX of certain public action frames in AP mode * add mac80211_hwsim to MAC80211 in MAINTAINERS, this helps the kbuild robot pick up the right tree for it ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * mac80211: minstrel_ht: fix a logic error in RTS/CTS handlingFelix Fietkau2016-03-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RTS/CTS needs to be enabled if the rate is a fallback rate *or* if it's a dual-stream rate and the sta is in dynamic SMPS mode. Cc: stable@vger.kernel.org Fixes: a3ebb4e1b763 ("mac80211: minstrel_ht: handle peers in dynamic SMPS") Reported-by: Matías Richart <mrichart@fing.edu.uy> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: Fix Public Action frame RX in AP modeJouni Malinen2016-03-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Public Action frames use special rules for how the BSSID field (Address 3) is set. A wildcard BSSID is used in cases where the transmitter and recipient are not members of the same BSS. As such, we need to accept Public Action frames with wildcard BSSID. Commit db8e17324553 ("mac80211: ignore frames between TDLS peers when operating as AP") added a rule that drops Action frames to TDLS-peers based on an Action frame having different DA (Address 1) and BSSID (Address 3) values. This is not correct since it misses the possibility of BSSID being a wildcard BSSID in which case the Address 1 would not necessarily match. Fix this by allowing mac80211 to accept wildcard BSSID in an Action frame when in AP mode. Fixes: db8e17324553 ("mac80211: ignore frames between TDLS peers when operating as AP") Cc: stable@vger.kernel.org Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: check PN correctly for GCMP-encrypted fragmented MPDUsJohannes Berg2016-03-012-10/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Just like for CCMP we need to check that for GCMP the fragments have PNs that increment by one; the spec was updated to fix this security issue and now has the following text: The receiver shall discard MSDUs and MMPDUs whose constituent MPDU PN values are not incrementing in steps of 1. Adapt the code for CCMP to work for GCMP as well, luckily the relevant fields already alias each other so no code duplication is needed (just check the aliasing with BUILD_BUG_ON.) Cc: stable@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| * | Merge tag 'mac80211-for-davem-2016-02-23' of ↵David S. Miller2016-02-243-8/+10
| |\ \ | | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Another small set of fixes: * stop critical protocol session on disconnect to avoid it getting stuck * wext: fix two RTNL message ordering issues * fix an uninitialized value (found by KASAN) * fix an out-of-bounds access (also found by KASAN) * clear connection keys when freeing them in all cases (IBSS, all other places already did so) * fix expected throughput unit to get consistent values * set default TX aggregation timeout to 0 in minstrel to avoid (really just hide) issues and perform better ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| | * mac80211: minstrel_ht: set default tx aggregation timeout to 0Felix Fietkau2016-02-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The value 5000 was put here with the addition of the timeout field to ieee80211_start_tx_ba_session. It was originally added in mac80211 to save resources for drivers like iwlwifi, which only supports a limited number of concurrent aggregation sessions. Since iwlwifi does not use minstrel_ht and other drivers don't need this, 0 is a better default - especially since there have been recent reports of aggregation setup related issues reproduced with ath9k. This should improve stability without causing any adverse effects. Cc: stable@vger.kernel.org Acked-by: Avery Pennarun <apenwarr@gmail.com> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: minstrel: Change expected throughput unit back to KbpsSven Eckelmann2016-02-022-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The change from cur_tp to the function minstrel_get_tp_avg/minstrel_ht_get_tp_avg changed the unit used for the current throughput. For example in minstrel_ht the correct conversion between them would be: mrs->cur_tp / 10 == minstrel_ht_get_tp_avg(..). This factor 10 must also be included in the calculation of minstrel_get_expected_throughput and minstrel_ht_get_expected_throughput to return values with the unit [Kbps] instead of [10Kbps]. Otherwise routing algorithms like B.A.T.M.A.N. V will make incorrect decision based on these values. Its kernel based implementation expects expected_throughput always to have the unit [Kbps] and not sometimes [10Kbps] and sometimes [Kbps]. The same requirement has iw or olsrdv2's nl80211 based statistics module which retrieve the same data via NL80211_STA_INFO_TX_BITRATE. Cc: stable@vger.kernel.org Fixes: 6a27b2c40b48 ("mac80211: restructure per-rate throughput calculation into function") Signed-off-by: Sven Eckelmann <sven@open-mesh.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: minstrel_ht: fix out-of-bound in minstrel_ht_set_best_prob_rateKonstantin Khlebnikov2016-02-021-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch fixes this splat BUG: KASAN: slab-out-of-bounds in minstrel_ht_update_stats.isra.7+0x6e1/0x9e0 [mac80211] at addr ffff8800cee640f4 Read of size 4 by task swapper/3/0 Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com> Link: http://lkml.kernel.org/r/CALYGNiNyJhSaVnE35qS6UCGaSb2Dx1_i5HcRavuOX14oTz2P+w@mail.gmail.com Acked-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: fix use of uninitialised values in RX aggregationChris Bainbridge2016-01-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use kzalloc instead of kmalloc for struct tid_ampdu_rx to initialize the "removed" field (all others are initialized manually). That fixes: UBSAN: Undefined behaviour in net/mac80211/rx.c:932:29 load of value 2 is not a valid value for type '_Bool' CPU: 3 PID: 1134 Comm: kworker/u16:7 Not tainted 4.5.0-rc1+ #265 Workqueue: phy0 rt2x00usb_work_rxdone 0000000000000004 ffff880254a7ba50 ffffffff8181d866 0000000000000007 ffff880254a7ba78 ffff880254a7ba68 ffffffff8188422d ffffffff8379b500 ffff880254a7bab8 ffffffff81884747 0000000000000202 0000000348620032 Call Trace: [<ffffffff8181d866>] dump_stack+0x45/0x5f [<ffffffff8188422d>] ubsan_epilogue+0xd/0x40 [<ffffffff81884747>] __ubsan_handle_load_invalid_value+0x67/0x70 [<ffffffff82227b4d>] ieee80211_sta_reorder_release.isra.16+0x5ed/0x730 [<ffffffff8222ca14>] ieee80211_prepare_and_rx_handle+0xd04/0x1c00 [<ffffffff8222db03>] __ieee80211_rx_handle_packet+0x1f3/0x750 [<ffffffff8222e4a7>] ieee80211_rx_napi+0x447/0x990 While at it, convert to use sizeof(*tid_agg_rx) instead. Fixes: 788211d81bfdf ("mac80211: fix RX A-MPDU session reorder timer deletion") Cc: stable@vger.kernel.org Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com> [reword commit message, use sizeof(*tid_agg_rx)] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | | mac80211: use reset to set header pointerZhang Shengju2016-03-044-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | Since offset is zero, it's not necessary to use set function. Reset function is straightforward, and will remove the unnecessary add operation in set function. Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge tag 'mac80211-next-for-davem-2016-02-26' of ↵David S. Miller2016-03-0129-361/+749
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== Here's another round of updates for -next: * big A-MSDU RX performance improvement (avoid linearize of paged RX) * rfkill changes: cleanups, documentation, platform properties * basic PBSS support in cfg80211 * MU-MIMO action frame processing support * BlockAck reordering & duplicate detection offload support * various cleanups & little fixes ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | mac80211: move MU_MIMO_OWNER flag to ieee80211_vifSara Sharon2016-02-244-12/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drivers may need to track which vif is using VHT MU-MIMO. Move the flag indicationg the ownership of MU_MIMO to ieee80211_vif. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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