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* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 432Thomas Gleixner2019-06-051-2/+1
| | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this file is gplv2 as found in copying extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190114.657082701@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cfg80211: track time using boottimeArnd Bergmann2018-06-291-2/+2
| | | | | | | | | | | | | | | The cfg80211 layer uses get_seconds() to read the current time in its supend handling. This function is deprecated because of the 32-bit time_t overflow, and it can cause unexpected behavior when the time changes due to settimeofday() calls or leap second updates. In many cases, we want to use monotonic time instead, however cfg80211 explicitly tracks the time spent in suspend, so this changes the driver over to use ktime_get_boottime_seconds(), which is slightly slower, but not used in a fastpath here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: check rdev resume callback only for registered wiphyArend Van Spriel2017-03-291-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We got the following use-after-free KASAN report: BUG: KASAN: use-after-free in wiphy_resume+0x591/0x5a0 [cfg80211] at addr ffff8803fc244090 Read of size 8 by task kworker/u16:24/2587 CPU: 6 PID: 2587 Comm: kworker/u16:24 Tainted: G B 4.9.13-debug+ Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 1.2.19 12/22/2016 Workqueue: events_unbound async_run_entry_fn ffff880425d4f9d8 ffffffffaeedb541 ffff88042b80ef00 ffff8803fc244088 ffff880425d4fa00 ffffffffae84d7a1 ffff880425d4fa98 ffff8803fc244080 ffff88042b80ef00 ffff880425d4fa88 ffffffffae84da3a ffffffffc141f7d9 Call Trace: [<ffffffffaeedb541>] dump_stack+0x85/0xc4 [<ffffffffae84d7a1>] kasan_object_err+0x21/0x70 [<ffffffffae84da3a>] kasan_report_error+0x1fa/0x500 [<ffffffffc141f7d9>] ? cfg80211_bss_age+0x39/0xc0 [cfg80211] [<ffffffffc141f83a>] ? cfg80211_bss_age+0x9a/0xc0 [cfg80211] [<ffffffffae48d46d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffffc13fb1c0>] ? wiphy_suspend+0xc70/0xc70 [cfg80211] [<ffffffffae84def1>] __asan_report_load8_noabort+0x61/0x70 [<ffffffffc13fb100>] ? wiphy_suspend+0xbb0/0xc70 [cfg80211] [<ffffffffc13fb751>] ? wiphy_resume+0x591/0x5a0 [cfg80211] [<ffffffffc13fb751>] wiphy_resume+0x591/0x5a0 [cfg80211] [<ffffffffc13fb1c0>] ? wiphy_suspend+0xc70/0xc70 [cfg80211] [<ffffffffaf3b206e>] dpm_run_callback+0x6e/0x4f0 [<ffffffffaf3b31b2>] device_resume+0x1c2/0x670 [<ffffffffaf3b367d>] async_resume+0x1d/0x50 [<ffffffffae3ee84e>] async_run_entry_fn+0xfe/0x610 [<ffffffffae3d0666>] process_one_work+0x716/0x1a50 [<ffffffffae3d05c9>] ? process_one_work+0x679/0x1a50 [<ffffffffafdd7b6d>] ? _raw_spin_unlock_irq+0x3d/0x60 [<ffffffffae3cff50>] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [<ffffffffae3d1a80>] worker_thread+0xe0/0x1460 [<ffffffffae3d19a0>] ? process_one_work+0x1a50/0x1a50 [<ffffffffae3e54c2>] kthread+0x222/0x2e0 [<ffffffffae3e52a0>] ? kthread_park+0x80/0x80 [<ffffffffae3e52a0>] ? kthread_park+0x80/0x80 [<ffffffffae3e52a0>] ? kthread_park+0x80/0x80 [<ffffffffafdd86aa>] ret_from_fork+0x2a/0x40 Object at ffff8803fc244088, in cache kmalloc-1024 size: 1024 Allocated: PID = 71 save_stack_trace+0x1b/0x20 save_stack+0x46/0xd0 kasan_kmalloc+0xad/0xe0 kasan_slab_alloc+0x12/0x20 __kmalloc_track_caller+0x134/0x360 kmemdup+0x20/0x50 brcmf_cfg80211_attach+0x10b/0x3a90 [brcmfmac] brcmf_bus_start+0x19a/0x9a0 [brcmfmac] brcmf_pcie_setup+0x1f1a/0x3680 [brcmfmac] brcmf_fw_request_nvram_done+0x44c/0x11b0 [brcmfmac] request_firmware_work_func+0x135/0x280 process_one_work+0x716/0x1a50 worker_thread+0xe0/0x1460 kthread+0x222/0x2e0 ret_from_fork+0x2a/0x40 Freed: PID = 2568 save_stack_trace+0x1b/0x20 save_stack+0x46/0xd0 kasan_slab_free+0x71/0xb0 kfree+0xe8/0x2e0 brcmf_cfg80211_detach+0x62/0xf0 [brcmfmac] brcmf_detach+0x14a/0x2b0 [brcmfmac] brcmf_pcie_remove+0x140/0x5d0 [brcmfmac] brcmf_pcie_pm_leave_D3+0x198/0x2e0 [brcmfmac] pci_pm_resume+0x186/0x220 dpm_run_callback+0x6e/0x4f0 device_resume+0x1c2/0x670 async_resume+0x1d/0x50 async_run_entry_fn+0xfe/0x610 process_one_work+0x716/0x1a50 worker_thread+0xe0/0x1460 kthread+0x222/0x2e0 ret_from_fork+0x2a/0x40 Memory state around the buggy address: ffff8803fc243f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8803fc244000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8803fc244080: fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8803fc244100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8803fc244180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb What is happening is that brcmf_pcie_resume() detects a device that is no longer responsive and it decides to unbind resulting in a wiphy_unregister() and wiphy_free() call. Now the wiphy instance remains allocated, because PM needs to call wiphy_resume() for it. However, brcmfmac already does a kfree() for the struct cfg80211_registered_device::ops field. Change the checks in wiphy_resume() to only access the struct cfg80211_registered_device::ops if the wiphy instance is still registered at this time. Cc: stable@vger.kernel.org # 4.10.x, 4.9.x Reported-by: Daniel J Blueman <daniel@quora.org> Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com> Reviewed-by: Franky Lin <franky.lin@broadcom.com> Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: sysfs: use wiphy_name()Johannes Berg2017-01-041-2/+4
| | | | | | | | Instead of open-coding dev_name(), use the wiphy_name() inline to make the code easier to understand. While at it, clean up some coding style. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: process events caused by suspend before suspendingJohannes Berg2016-10-261-1/+4
| | | | | | | | | | | | | | | | | When suspending without WoWLAN, cfg80211 will ask drivers to disconnect. Even when the driver does this synchronously, and immediately returns with a notification, cfg80211 schedules the handling thereof to a workqueue, and may then call back into the driver when the driver was already suspended/ing. Fix this by processing all events caused by cfg80211_leave_all() directly after that function returns. The driver still needs to do the right thing here and wait for the firmware response, but that is - at least - true for mwifiex where this occurred. Reported-by: Amitkumar Karwar <akarwar@marvell.com> Tested-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: remove unnecessary pointer-ofJohannes Berg2016-09-151-1/+1
| | | | | | | For an array, there's no need to use &array, so just use the plain wiphy->addresses[i].addr here to silence smatch. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: make wdev_list accessible to driversJohannes Berg2016-05-121-1/+1
| | | | | | | | There's no harm in having drivers read the list, since they can use RCU protection or RTNL locking; allow this to not require each and every driver to also implement its own bookkeeping. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: Switch to PM opsLars-Peter Clausen2015-05-201-6/+8
| | | | | | | | Use dev_pm_ops instead of the legacy suspend/resume callbacks for the wiphy class suspend and resume operations. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* net: wireless: convert class code to use dev_groupsGreg Kroah-Hartman2013-07-261-11/+14
| | | | | | | | | | The dev_attrs field of struct class is going away soon, dev_groups should be used instead. This converts the networking wireless class code to use the correct field. Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Cc: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cfg80211: fix compilation warning for cfg80211_leave_all()Arend van Spriel2013-06-241-1/+1
| | | | | | | | | | | | | | The following compilation issue popped up moving from v3.10-rc1 to v3.10-rc6 after merging wireless-testing. net/wireless/sysfs.c:86:13: error: 'cfg80211_leave_all' defined but not used [-Werror=unused-function] The function is only called when CONFIG_PM is enabled. Moving the function under CONFIG_PM as well. Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: make WoWLAN configuration available to driversJohannes Berg2013-05-271-2/+6
| | | | | | | | | | Make the current WoWLAN configuration available to drivers at runtime. This isn't really useful for the normal WoWLAN behaviour and accessing it can also be racy, but drivers may use it for testing the WoWLAN device behaviour while the host stays up & running to observe the device. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211/mac80211: disconnect on suspendStanislaw Gruszka2013-03-061-5/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If possible that after suspend, cfg80211 will receive request to disconnect what require action on interface that was removed during suspend. Problem can manifest itself by various warnings similar to below one: WARNING: at net/mac80211/driver-ops.h:12 ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211]() wlan0: Failed check-sdata-in-driver check, flags: 0x4 Call Trace: [<c043e0b3>] warn_slowpath_fmt+0x33/0x40 [<f83707c9>] ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211] [<f83a660a>] ieee80211_recalc_ps_vif+0x2a/0x30 [mac80211] [<f83a6706>] ieee80211_set_disassoc+0xf6/0x500 [mac80211] [<f83a9441>] ieee80211_mgd_deauth+0x1f1/0x280 [mac80211] [<f8381b36>] ieee80211_deauth+0x16/0x20 [mac80211] [<f8261e70>] cfg80211_mlme_down+0x70/0xc0 [cfg80211] [<f8264de1>] __cfg80211_disconnect+0x1b1/0x1d0 [cfg80211] To fix the problem disconnect from any associated network before suspend. User space is responsible to establish connection again after resume. This basically need to be done by user space anyway, because associated stations can go away during suspend (for example NetworkManager disconnects on suspend and connect on resume by default). Patch also handle situation when driver refuse to suspend with wowlan configured and try to suspend again without it. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge branch 'master' of ↵John W. Linville2013-02-181-2/+0
|\ | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem Conflicts: drivers/net/wireless/iwlwifi/dvm/tx.c drivers/net/wireless/ti/wlcore/sdio.c drivers/net/wireless/ti/wlcore/spi.c
| * cfg80211: move locking into cfg80211_bss_ageJohannes Berg2013-02-041-2/+0
| | | | | | | | | | | | | | There's no reason for it to require external locking, move it into the function. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | CONFIG_HOTPLUG removal from networking coreGreg KH2012-12-221-4/+0
|/ | | | | | | | | | CONFIG_HOTPLUG is always enabled now, so remove the unused code that was trying to be compiled out when this option was disabled, in the networking core. Cc: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* cfg80211: add wrappers for registered_device_opsHila Gonen2012-10-181-2/+3
| | | | | | | | | This will allow adding central tracing like in mac80211. Signed-off-by: Hila Gonen <hila.gonen@intel.com> Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Reviewed-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: fix suspend/resume races with unregister hwStanislaw Gruszka2011-08-221-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not call ->suspend, ->resume methods after we unregister wiphy. Also delete sta_clanup timer after we finish wiphy unregister to avoid this: WARNING: at lib/debugobjects.c:262 debug_print_object+0x85/0xa0() Hardware name: 6369CTO ODEBUG: free active (active state 0) object type: timer_list hint: sta_info_cleanup+0x0/0x180 [mac80211] Modules linked in: aes_i586 aes_generic fuse bridge stp llc autofs4 sunrpc cpufreq_ondemand acpi_cpufreq mperf ext2 dm_mod uinput thinkpad_acpi hwmon sg arc4 rt2800usb rt2800lib crc_ccitt rt2x00usb rt2x00lib mac80211 cfg80211 i2c_i801 iTCO_wdt iTCO_vendor_support e1000e ext4 mbcache jbd2 sd_mod crc_t10dif sr_mod cdrom yenta_socket ahci libahci pata_acpi ata_generic ata_piix i915 drm_kms_helper drm i2c_algo_bit video [last unloaded: microcode] Pid: 5663, comm: pm-hibernate Not tainted 3.1.0-rc1-wl+ #19 Call Trace: [<c0454cfd>] warn_slowpath_common+0x6d/0xa0 [<c05e05e5>] ? debug_print_object+0x85/0xa0 [<c05e05e5>] ? debug_print_object+0x85/0xa0 [<c0454dae>] warn_slowpath_fmt+0x2e/0x30 [<c05e05e5>] debug_print_object+0x85/0xa0 [<f8a808e0>] ? sta_info_alloc+0x1a0/0x1a0 [mac80211] [<c05e0bd2>] debug_check_no_obj_freed+0xe2/0x180 [<c051175b>] kfree+0x8b/0x150 [<f8a126ae>] cfg80211_dev_free+0x7e/0x90 [cfg80211] [<f8a13afd>] wiphy_dev_release+0xd/0x10 [cfg80211] [<c068d959>] device_release+0x19/0x80 [<c05d06ba>] kobject_release+0x7a/0x1c0 [<c07646a8>] ? rtnl_unlock+0x8/0x10 [<f8a13adb>] ? wiphy_resume+0x6b/0x80 [cfg80211] [<c05d0640>] ? kobject_del+0x30/0x30 [<c05d1a6d>] kref_put+0x2d/0x60 [<c05d056d>] kobject_put+0x1d/0x50 [<c08015f4>] ? mutex_lock+0x14/0x40 [<c068d60f>] put_device+0xf/0x20 [<c069716a>] dpm_resume+0xca/0x160 [<c04912bd>] hibernation_snapshot+0xcd/0x260 [<c04903df>] ? freeze_processes+0x3f/0x90 [<c049151b>] hibernate+0xcb/0x1e0 [<c048fdc0>] ? pm_async_store+0x40/0x40 [<c048fe60>] state_store+0xa0/0xb0 [<c048fdc0>] ? pm_async_store+0x40/0x40 [<c05d0200>] kobj_attr_store+0x20/0x30 [<c0575ea4>] sysfs_write_file+0x94/0xf0 [<c051e26a>] vfs_write+0x9a/0x160 [<c0575e10>] ? sysfs_open_file+0x200/0x200 [<c051e3fd>] sys_write+0x3d/0x70 [<c080959f>] sysenter_do_call+0x12/0x28 Cc: stable@kernel.org Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* nl80211/cfg80211: WoWLAN supportJohannes Berg2011-05-051-1/+1
| | | | | | | | | | | | | | | | | This is based on (but now quite far from) the original work from Luis and Eliad. Add support for configuring WoWLAN triggers, and getting the configuration out again. Changes from the original patchset are too numerous to list, but one important change needs highlighting: the suspend() callback is passed NULL for the trigger configuration if userspace has not configured WoWLAN at all. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* wireless: Print wiphy name in sysfs.Ben Greear2010-10-121-0/+9
| | | | | | | | | | The index cannot be used to reliably reconstruct a phy name, so explicitly add the phy name to sysfs so that scripts can figure out the parent phy device for a particular wireless interface. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* cfg80211: support sysfs namespacesJohannes Berg2010-08-161-0/+9
| | | | | | | | | | | Enable using network namespaces with wireless devices even when sysfs is enabled using the same infrastructure that was built for netdevs. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* cfg80211: export multiple MAC addresses in sysfsJohannes Berg2010-01-221-0/+20
| | | | | | | | | | | | | | | | | | | | If a device has multiple MAC addresses, userspace will need to know about that. Similarly, if it allows the MAC addresses to vary by a bitmask. If a driver exports multiple addresses, it is assumed that it will be able to deal with that many different addresses, which need not necessarily match the ones programmed into the device; if a mask is set then the device should deal addresses within that mask based on an arbitrary "base address". To test it all and show how it is used, add support to hwsim even though it can't actually deal with addresses different from the default. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* cfg80211: rename cfg80211_registered_device's idx to wiphy_idxLuis R. Rodriguez2009-02-271-1/+1
| | | | | | | Makes it clearer to read when comparing to ifidx Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* cfg80211: age scan results on resumeDan Williams2009-02-271-0/+7
| | | | | | | | | | | | Scanned BSS entries are timestamped with jiffies, which doesn't increment across suspend and hibernate. On resume, every BSS in the scan list looks like it was scanned within the last 10 seconds, irregardless of how long the machine was actually asleep. Age scan results on resume with the time spent during sleep so userspace has a clue how old they really are. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* cfg80211: add PM hooksJohannes Berg2009-01-291-0/+30
| | | | | | | | | | | This should help implement suspend/resume in mac80211, these hooks will be run before the device is suspended and after it resumes. Therefore, they can touch the hardware as much as they want to. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* wireless: clean up sysfs code using %pMJohannes Berg2008-11-211-15/+10
| | | | | | | | | | Remove converting the MAC address to a string by a direct byte conversion and use %pM instead, since the code is now boilerplate use a macro to define the show functions, and also use the shorter __ATTR_RO macro to define the attributes. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Driver core: change add_uevent_var to use a structKay Sievers2007-10-121-2/+1
| | | | | | | | | | | | | | | | | | This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] net/wireless/sysfs.c: Shut up build warningSatyam Sharma2007-09-261-0/+2
| | | | | | | | | | | net/wireless/sysfs.c:108: warning: ‘wiphy_uevent’ defined but not used when CONFIG_HOTPLUG=n is because the only usage site of this function is #ifdef'ed as such, so let's #ifdef the definition also. Signed-off-by: Satyam Sharma <satyam@infradead.org> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [PATCH] cfg80211: fix signed macaddress in sysfsDavid Lamparter2007-06-111-1/+1
| | | | | | | | | Fix signedness mixup making mac addresses show up strangely (like 00:11:22:33:44:ffffffaa) in /sys/class/ieee80211/*/macaddress. Signed-off-by: David Lamparter <equinox@diac24.net> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [WIRELESS] cfg80211: New wireless config infrastructure.Johannes Berg2007-04-261-0/+80
This patch creates the core cfg80211 code along with some sysfs bits. This is a stripped down version to allow mac80211 to function, but doesn't include any configuration yet except for creating and removing virtual interfaces. This patch includes the nl80211 header file but it only contains the interface types which the cfg80211 interface for creating virtual interfaces relies on. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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