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2016-04-05udp: remove headers from UDP packets before queueingsamanthakumar3-20/+31
Remove UDP transport headers before queueing packets for reception. This change simplifies a follow-up patch to add MSG_PEEK support. Signed-off-by: Sam Kumar <[email protected]> Signed-off-by: Willem de Bruijn <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2016-04-05netlabel: fix a problem with netlbl_secattr_catmap_setrng()Janak Desai1-1/+1
We try to be clever and set large chunks of the bitmap at once, when possible; unfortunately we weren't very clever when we wrote the code and messed up the if-conditional. Fix this bug and restore proper operation. Signed-off-by: Janak Desai <[email protected]> Signed-off-by: Paul Moore <[email protected]>
2016-04-05sctp: flush if we can't fit another DATA chunkMarcelo Ricardo Leitner1-1/+2
There is no point on delaying the packet if we can't fit a single byte of data on it anymore. So lets just reduce the threshold by the amount that a data chunk with 4 bytes (rounding) would use. v2: based on the right tree Signed-off-by: Marcelo Ricardo Leitner <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2016-04-05mac80211: mesh: flush paths outside of plink lockBob Copeland1-2/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: fix cleanup for mesh pathtableBob Copeland3-2/+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 <[email protected]> Signed-off-by: Bob Copeland <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: fix mesh path kerneldocBob Copeland1-8/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: reorder structure membersBob Copeland1-3/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: embed gates hlist head directlyBob Copeland2-15/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: use hlist for rmc cacheBob Copeland2-10/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: handle failed alloc for rmc cacheBob Copeland1-0/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: fix crash in mesh_path_timerBob Copeland3-15/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: track and tell driver about GO client P2P PS abilitiesAyala Beker2-0/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05cfg80211: allow userspace to specify client P2P PS supportAyala Beker1-0/+34
Legacy clients don't support P2P power save mechanisms, and thus if a P2P GO has a legacy client connected to it, it has to make some changes in the PS behavior. To handle this, add an attribute to specify whether a station supports P2P PS or not. If the attribute was not specified cfg80211 will assume that station supports it for P2P GO interface, and does NOT support it for AP interface, matching the current assumptions in the code. Signed-off-by: Ayala Beker <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: avoid useless memory write on each frame RXJohannes Berg1-3/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: fix cipher scheme function nameJohannes Berg1-4/+4
The code is only used with iwlwifi, but still should have proper mac80211 naming scheme; fix that. Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: clean up station flags debugfsJohannes Berg2-20/+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 <[email protected]>
2016-04-05mac80211: don't start dynamic PS timer if not neededJohannes Berg1-5/+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 <[email protected]>
2016-04-05mac80211: remove sta_info debugfs sub-structJohannes Berg3-17/+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 <[email protected]>
2016-04-05mac80211: Remove unused variable in per STA debugfs structMohammed Shafi Shajakhan2-3/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: enable starting BA session with custom timeoutSara Sharon1-17/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: add NETIF_F_RXCSUM to features white listSara Sharon1-1/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: Set global RRM capabilityEmmanuel Grumbach1-0/+2
Allow publishing RRM capabilities for features that are not HW dependent. Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: minstrel_ht: improve sample rate skip logicFelix Fietkau1-7/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: close the SP when we enqueue frames during the SPEmmanuel Grumbach1-0/+6
Since we enqueued the frame that was supposed to be sent during the SP, and that frame may very well cary the IEEE80211_TX_STATUS_EOSP bit, we may never close the SP (WLAN_STA_SP will never be cleared). If that happens, we will not open any new SP and will never respond to any poll frame from the client. Clear WLAN_STA_SP manually if a frame that was polled during the SP is queued because of a starting A-MPDU session. The client may not see the EOSP bit, but it will at least be able to poll new frames in another SP. Reported-by: Alesya Shapira <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> [remove erroneous comment] Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: Fix BW upgrade for TDLS peersIlan Peer1-1/+2
It is possible that the station is connected to an AP with bandwidth of 80+80MHz or 160MHz. In such cases there is no need to perform an upgrade as the maximal supported bandwidth is 80MHz. In addition, when upgrading and setting center_freq1 and bandwidth to 80MHz also set center_freq2 to 0. Fixes: 0fabfaafec3a ("mac80211: upgrade BW of TDLS peers when possible" Signed-off-by: Ilan Peer <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: don't send deferred frames outside the SPEmmanuel Grumbach1-3/+1
Frames that are sent between ampdu_action(IEEE80211_AMPDU_TX_START) and the move to the HT_AGG_STATE_OPERATIONAL state are buffered. If we try to start an A-MPDU session while the peer is sleeping and polling frames with U-APSD, we may have frames that will be buffered by ieee80211_tx_prep_agg. These frames have IEEE80211_TX_CTL_NO_PS_BUFFER set since they are sent to a sleeping client and possibly IEEE80211_TX_STATUS_EOSP. If the frame is buffered, we need clear these two flags since they will be re-sent after the move to HT_AGG_STATE_OPERATIONAL state which is very likely to happen after the SP ends. Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: remove description of dropped memberLuis de Bethencourt1-1/+0
Commit 976bd9efdae6 ("mac80211: move beacon_loss_count into ifmgd") removed the member from the sta_info struct but the description stayed lingering. Remove it. Signed-off-by: Luis de Bethencourt <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: ensure no limits on station rhashtableBen Greear1-0/+1
By default, the rhashtable logic will fail to insert objects if the key-chains are too long and un-balanced. In the degenerate case where mac80211 is creating many virtual interfaces connected to the same peer(s), this case can happen. St insecure_elasticity to true to allow chains to grow as long as needed. Signed-off-by: Ben Greear <[email protected]> [remove message, change commit message slightly] Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: properly deal with station hashtable insert errorsJohannes Berg1-5/+8
The original hand-implemented hash-table in mac80211 couldn't result in insertion errors, and while converting to rhashtable I evidently forgot to check the errors. This surfaced now only because Ben is adding many identical keys and that resulted in hidden insertion errors. Cc: [email protected] Fixes: 7bedd0cfad4e1 ("mac80211: use rhashtable for station table") Reported-by: Ben Greear <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: do not pass injected frames without a valid rate to the driverFelix Fietkau1-0/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: fix parsing of 40Mhz in injected radiotap headerSven Eckelmann1-2/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05nl80211: add feature for BSS selection supportArend van Spriel2-0/+118
Introducing a new feature that the driver can use to indicate the driver/firmware supports configuration of BSS selection criteria upon CONNECT command. This can be useful when multiple BSS-es are found belonging to the same ESS, ie. Infra-BSS with same SSID. The criteria can then be used to offload selection of a preferred BSS. Reviewed-by: Hante Meuleman <[email protected]> Reviewed-by: Franky (Zhenhui) Lin <[email protected]> Reviewed-by: Pieter-Paul Giesberts <[email protected]> Reviewed-by: Lei Zhang <[email protected]> Signed-off-by: Arend van Spriel <[email protected]> [move wiphy support check into parse_bss_select()] Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: synchronize driver rx queues before removing a stationSara Sharon3-1/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: convert path table to rhashtableBob Copeland4-575/+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 <[email protected]> Cc: [email protected] Signed-off-by: Bob Copeland <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05rhashtable: accept GFP flags in rhashtable_walk_initBob Copeland4-5/+8
In certain cases, the 802.11 mesh pathtable code wants to iterate over all of the entries in the forwarding table from the receive path, which is inside an RCU read-side critical section. Enable walks inside atomic sections by allowing GFP_ATOMIC allocations for the walker state. Change all existing callsites to pass in GFP_KERNEL. Acked-by: Thomas Graf <[email protected]> Signed-off-by: Bob Copeland <[email protected]> [also adjust gfs2/glock.c and rhashtable tests] Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: embed known gates list in struct mesh_pathBob Copeland2-56/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: factor out common mesh path allocation codeBob Copeland1-23/+28
Remove duplicate code to allocate and initialize a mesh path or mesh proxy path. Signed-off-by: Bob Copeland <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: don't hash sdata in mpath tablesBob Copeland1-10/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: mesh: move path tables into if_meshBob Copeland6-115/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: Support a scan request for a specific BSSIDJouni Malinen1-1/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05cfg80211: Allow a scan request for a specific BSSIDJouni Malinen3-0/+10
This allows scans for a specific BSSID to be optimized by the user space application by requesting the driver to set the Probe Request frame BSSID field (Address 3) to the specified BSSID instead of the wildcard BSSID. This prevents other APs from replying which reduces airtime need and latency in getting the response from the target AP through. This is an optimization and as such, it is acceptable for some of the drivers not to support the mechanism. If not supported, the wildcard BSSID will be used and more responses may be received. Signed-off-by: Jouni Malinen <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: recalc min_def chanctx even when chandef is identicalArik Nemtsov1-1/+3
The min_def chanctx is affected not only by the current chandef, but sometimes also by other stations on the vif. There's a valid scenario where a TDLS peer can widen its BW, thereby causing the min_def to increase. Signed-off-by: Arik Nemtsov <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: TDLS: change BW calculation for WIDER_BW peersArik Nemtsov3-11/+61
The previous approach simply ignored chandef restrictions when calculating the appropriate peer BW for a WIDER_BW peer. This could result in a regulatory violation if both peers indicated 80MHz support, but the regdomain forbade it. Change the approach to setting a WIDER_BW peer's BW. Don't exempt it from the chandef width at first. If during TDLS negotiation the chandef width is upgraded, update the peer's BW to match. Fixes: 0fabfaafec3a ("mac80211: upgrade BW of TDLS peers when possible") Signed-off-by: Arik Nemtsov <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: TDLS: always downgrade invalid chandefsArik Nemtsov1-1/+1
Even if the current chandef width is equal to the station's max-BW, it doesn't mean it's a valid width for TDLS. Make sure to always check regulatory constraints in these cases. Fixes: 0fabfaafec3a ("mac80211: upgrade BW of TDLS peers when possible") Signed-off-by: Arik Nemtsov <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: fix AP buffered multicast frames with queue control and txqFelix Fietkau1-1/+2
Buffered multicast frames must be passed to the driver directly via drv_tx instead of going through the txq, otherwise they cannot easily be scheduled to be sent after DTIM. Signed-off-by: Felix Fietkau <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: allow not sending MIC up from driver for HW cryptoSara Sharon2-14/+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 <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05mac80211: allow drivers to report CLOCK_BOOTTIME for scan resultsJohannes Berg1-1/+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 <[email protected]>
2016-04-05mac80211: parse VHT info in injected framesLorenzo Bianconi1-0/+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 <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
2016-04-05rfkill: Use switch to demux userspace operationsJoão Paulo Rechi Vita1-14/+22
Using a switch to handle different ev.op values in rfkill_fop_write() makes the code easier to extend, as out-of-range values can always be handled by the default case. Signed-off-by: João Paulo Rechi Vita <[email protected]> [roll in fix for RFKILL_OP_CHANGE from Jouni] Signed-off-by: Johannes Berg <[email protected]>
2016-04-05wext: unregister_pernet_subsys() on notifier registration failureJohannes Berg1-1/+4
If register_netdevice_notifier() fails (which in practice it can't right now), we should call unregister_pernet_subsys(). Do that. Reported-by: Ben Hutchings <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
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