| Commit message (Collapse) | Author | Age | Files | Lines |
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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 <ayala.beker@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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 <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Lei Zhang <leizh@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
[move wiphy support check into parse_bss_select()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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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>
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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>
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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 <tgraf@suug.ch>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
[also adjust gfs2/glock.c and rhashtable tests]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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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>
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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>
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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>
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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>
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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>
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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 <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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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>
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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>
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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>
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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 <jprvita@endlessm.com>
[roll in fix for RFKILL_OP_CHANGE from Jouni]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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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 <ben@decadent.org.uk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Ptr to devlink structure can be easily obtained from
devlink_port->devlink. So share user_ptr[0] pointer for both and leave
user_ptr[1] free for other users.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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As we rely on caller zeroing or correctly set the struct before the call,
this implicit type set is either no-op (DEVLINK_PORT_TYPE_NOTSET is 0)
or it rewrites wanted value. So remove this.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Resetting a bearer/interface, with the consequence of resetting all its
pertaining links, is not an atomic action. This becomes particularly
evident in very large clusters, where a lot of traffic may happen on the
remaining links while we are busy shutting them down. In extreme cases,
we may even see links being re-created and re-established before we are
finished with the job.
To solve this, we now introduce a solution where we temporarily detach
the bearer from the interface when the bearer is reset. This inhibits
all packet reception, while sending still is possible. For the latter,
we use the fact that the device's user pointer now is zero to filter out
which packets can be sent during this situation; i.e., outgoing RESET
messages only. This filtering serves to speed up the neighbors'
detection of the loss event, and saves us from unnecessary probing.
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When enabling a bearer we create a 'neigbor discoverer' instance by
calling the function tipc_disc_create() before the bearer is actually
registered in the list of enabled bearers. Because of this, the very
first discovery broadcast message, created by the mentioned function,
is lost, since it cannot find any valid bearer to use. Furthermore,
the used send function, tipc_bearer_xmit_skb() does not free the given
buffer when it cannot find a bearer, resulting in the leak of exactly
one send buffer each time a bearer is enabled.
This commit fixes this problem by introducing two changes:
1) Instead of attemting to send the discovery message directly, we let
tipc_disc_create() return the discovery buffer to the calling
function, tipc_enable_bearer(), so that the latter can send it
when the enabling sequence is finished.
2) In tipc_bearer_xmit_skb(), as well as in the two other transmit
functions at the bearer layer, we now free the indicated buffer or
buffer chain when a valid bearer cannot be found.
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that the UDP encapsulation GRO functions have been moved to the UDP
socket we not longer need the udp_offload insfrastructure so removing it.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Adapt gue_gro_receive, gue_gro_complete to take a socket argument.
Don't set udp_offloads any more.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add gro_receive and gro_complete to struct udp_tunnel_sock_cfg.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds GRO functions (gro_receive and gro_complete) to UDP
sockets. udp_gro_receive is changed to perform socket lookup on a
packet. If a socket is found the related GRO functions are called.
This features obsoletes using UDP offload infrastructure for GRO
(udp_offload). This has the advantage of not being limited to provide
offload on a per port basis, GRO is now applied to whatever individual
UDP sockets are bound to. This also allows the possbility of
"application defined GRO"-- that is we can attach something like
a BPF program to a UDP socket to perfrom GRO on an application
layer protocol.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add externally visible functions to lookup a UDP socket by skb. This
will be used for GRO in UDP sockets. These functions also check
if skb->dst is set, and if it is not skb->dev is used to get dev_net.
This allows calling lookup functions before dst has been set on the
skbuff.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This reverts commit 5a5abb1fa3b05dd ("tun, bpf: fix suspicious RCU usage
in tun_{attach, detach}_filter") and replaces it to use lock_sock around
sk_{attach,detach}_filter. The checks inside filter.c are updated with
lockdep_sock_is_held to check for proper socket locks.
It keeps the code cleaner by ensuring that only one lock governs the
socket filter instead of two independent locks.
Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The socket is either locked if we hold the slock spin_lock for
lock_sock_fast and unlock_sock_fast or we own the lock (sk_lock.owned
!= 0). Check for this and at the same time improve that the current
thread/cpu is really holding the lock.
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During release_sock we use callbacks to finish the processing
of outstanding skbs on the socket. We actually are still locked,
sk_locked.owned == 1, but we already told lockdep that the mutex
is released. This could lead to false positives in lockdep for
lockdep_sock_is_held (we don't hold the slock spinlock during processing
the outstanding skbs).
I took over this patch from Eric Dumazet and tested it.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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