1. 12 6月, 2012 1 次提交
    • S
      Bluetooth: Fix using uninitialized option in RFCMode · 8f321f85
      Szymon Janc 提交于
      If remote device sends bogus RFC option with invalid length,
      undefined options values are used. Fix this by using defaults when
      remote misbehaves.
      
      This also fixes the following warning reported by gcc 4.7.0:
      
      net/bluetooth/l2cap_core.c: In function 'l2cap_config_rsp':
      net/bluetooth/l2cap_core.c:3302:13: warning: 'rfc.max_pdu_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
      net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.max_pdu_size' was declared here
      net/bluetooth/l2cap_core.c:3298:25: warning: 'rfc.monitor_timeout' may be used uninitialized in this function [-Wmaybe-uninitialized]
      net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.monitor_timeout' was declared here
      net/bluetooth/l2cap_core.c:3297:25: warning: 'rfc.retrans_timeout' may be used uninitialized in this function [-Wmaybe-uninitialized]
      net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.retrans_timeout' was declared here
      net/bluetooth/l2cap_core.c:3295:2: warning: 'rfc.mode' may be used uninitialized in this function [-Wmaybe-uninitialized]
      net/bluetooth/l2cap_core.c:3266:24: note: 'rfc.mode' was declared here
      Signed-off-by: NSzymon Janc <szymon.janc@tieto.com>
      Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
      8f321f85
  2. 10 6月, 2012 1 次提交
    • M
      Bluetooth: Support AR3011 in Acer Iconia Tab W500 · 6eda541d
      Marek Vasut 提交于
      Acer used this chip connected via USB:
      
      Bus 005 Device 005: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
      Device Descriptor:
        bLength                18
        bDescriptorType         1
        bcdUSB               1.10
        bDeviceClass          224 Wireless
        bDeviceSubClass         1 Radio Frequency
        bDeviceProtocol         1 Bluetooth
        bMaxPacketSize0        64
        idVendor           0x0cf3 Atheros Communications, Inc.
        idProduct          0x3005 AR3011 Bluetooth
        bcdDevice            0.01
        iManufacturer           0
        iProduct                0
        iSerial                 0
        bNumConfigurations      1
      Signed-off-by: NMarek Vasut <marex@denx.de>
      Cc: Gustavo Padovan <gustavo@padovan.org>
      Cc: Johan Hedberg <johan.hedberg@gmail.com>
      Cc: Marcel Holtmann <marcel@holtmann.org>
      Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
      6eda541d
  3. 09 6月, 2012 1 次提交
  4. 08 6月, 2012 4 次提交
  5. 05 6月, 2012 17 次提交
    • V
      Bluetooth: Fix checking the wrong flag when accepting a socket · ddcd0f41
      Vinicius Costa Gomes 提交于
      Most probably a typo, the check should have been for BT_SK_DEFER_SETUP
      instead of BT_DEFER_SETUP (which right now only represents a socket
      option).
      Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@openbossa.org>
      Acked-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
      Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
      ddcd0f41
    • J
      iwlwifi: disable WoWLAN if !CONFIG_PM_SLEEP · fcb6ff5e
      Johannes Berg 提交于
      If CONFIG_PM_SLEEP is disabled, then iwlwifi doesn't
      support suspend/resume handlers and thus mac80211
      (correctly) refuses advertising WoWLAN. Disable
      WoWLAN in the driver in this case.
      
      Cc: stable@kernel.org
      Reported-by: NSebastian Kemper <sebastian_ml@gmx.net>
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      fcb6ff5e
    • A
      mac80211: fix non RCU-safe sta_list manipulation · 794454ce
      Arik Nemtsov 提交于
      sta_info_cleanup locks the sta_list using rcu_read_lock however
      the delete operation isn't rcu safe. A race between sta_info_cleanup
      timer being called and a STA being removed can occur which leads
      to a panic while traversing sta_list. Fix this by switching to the
      RCU-safe versions.
      
      Cc: stable@vger.kernel.org
      Reported-by: NEyal Shapira <eyal@wizery.com>
      Signed-off-by: NArik Nemtsov <arik@wizery.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      794454ce
    • S
      bcma: add ext PA workaround for BCM4331 and BCM43431 · 69aaedd3
      Seth Forshee 提交于
      MacBook Pro models with BCM4331 wireless have been found to have the ext
      PA lines disabled after resuming from S3 without external power attach.
      This causes them to be unable to transmit. Add a workaround to ensure
      that the ext PA lines are enabled on BCM4331. Also extend all handling
      of ext PA line muxing to BCM43431 as is done in the Broadcom SDK.
      
      BugLink: http://bugs.launchpad.net/bugs/925577
      Cc: Arend van Spriel <arend@broadcom.com>
      Cc: Hauke Mehrtens <hauke@hauke-m.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: NSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      69aaedd3
    • S
      rt2x00: use atomic variable for seqno · e5851dac
      Stanislaw Gruszka 提交于
      Remove spinlock as atomic_t can be used instead. Note we use only 16
      lower bits, upper bits are changed but we impilcilty cast to u16.
      
      This fix possible deadlock on IBSS mode reproted by lockdep:
      
      =================================
      [ INFO: inconsistent lock state ]
      3.4.0-wl+ #4 Not tainted
      ---------------------------------
      inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
      kworker/u:2/30374 [HC0[0]:SC0[0]:HE1:SE1] takes:
       (&(&intf->seqlock)->rlock){+.?...}, at: [<f9979a20>] rt2x00queue_create_tx_descriptor+0x380/0x490 [rt2x00lib]
      {IN-SOFTIRQ-W} state was registered at:
        [<c04978ab>] __lock_acquire+0x47b/0x1050
        [<c0498504>] lock_acquire+0x84/0xf0
        [<c0835733>] _raw_spin_lock+0x33/0x40
        [<f9979a20>] rt2x00queue_create_tx_descriptor+0x380/0x490 [rt2x00lib]
        [<f9979f2a>] rt2x00queue_write_tx_frame+0x1a/0x300 [rt2x00lib]
        [<f997834f>] rt2x00mac_tx+0x7f/0x380 [rt2x00lib]
        [<f98fe363>] __ieee80211_tx+0x1b3/0x300 [mac80211]
        [<f98ffdf5>] ieee80211_tx+0x105/0x130 [mac80211]
        [<f99000dd>] ieee80211_xmit+0xad/0x100 [mac80211]
        [<f9900519>] ieee80211_subif_start_xmit+0x2d9/0x930 [mac80211]
        [<c0782e87>] dev_hard_start_xmit+0x307/0x660
        [<c079bb71>] sch_direct_xmit+0xa1/0x1e0
        [<c0784bb3>] dev_queue_xmit+0x183/0x730
        [<c078c27a>] neigh_resolve_output+0xfa/0x1e0
        [<c07b436a>] ip_finish_output+0x24a/0x460
        [<c07b4897>] ip_output+0xb7/0x100
        [<c07b2d60>] ip_local_out+0x20/0x60
        [<c07e01ff>] igmpv3_sendpack+0x4f/0x60
        [<c07e108f>] igmp_ifc_timer_expire+0x29f/0x330
        [<c04520fc>] run_timer_softirq+0x15c/0x2f0
        [<c0449e3e>] __do_softirq+0xae/0x1e0
      irq event stamp: 18380437
      hardirqs last  enabled at (18380437): [<c0526027>] __slab_alloc.clone.3+0x67/0x5f0
      hardirqs last disabled at (18380436): [<c0525ff3>] __slab_alloc.clone.3+0x33/0x5f0
      softirqs last  enabled at (18377616): [<c0449eb3>] __do_softirq+0x123/0x1e0
      softirqs last disabled at (18377611): [<c041278d>] do_softirq+0x9d/0xe0
      
      other info that might help us debug this:
       Possible unsafe locking scenario:
      
             CPU0
             ----
        lock(&(&intf->seqlock)->rlock);
        <Interrupt>
          lock(&(&intf->seqlock)->rlock);
      
       *** DEADLOCK ***
      
      4 locks held by kworker/u:2/30374:
       #0:  (wiphy_name(local->hw.wiphy)){++++.+}, at: [<c045cf99>] process_one_work+0x109/0x3f0
       #1:  ((&sdata->work)){+.+.+.}, at: [<c045cf99>] process_one_work+0x109/0x3f0
       #2:  (&ifibss->mtx){+.+.+.}, at: [<f98f005b>] ieee80211_ibss_work+0x1b/0x470 [mac80211]
       #3:  (&intf->beacon_skb_mutex){+.+...}, at: [<f997a644>] rt2x00queue_update_beacon+0x24/0x50 [rt2x00lib]
      
      stack backtrace:
      Pid: 30374, comm: kworker/u:2 Not tainted 3.4.0-wl+ #4
      Call Trace:
       [<c04962a6>] print_usage_bug+0x1f6/0x220
       [<c0496a12>] mark_lock+0x2c2/0x300
       [<c0495ff0>] ? check_usage_forwards+0xc0/0xc0
       [<c04978ec>] __lock_acquire+0x4bc/0x1050
       [<c0527890>] ? __kmalloc_track_caller+0x1c0/0x1d0
       [<c0777fb6>] ? copy_skb_header+0x26/0x90
       [<c0498504>] lock_acquire+0x84/0xf0
       [<f9979a20>] ? rt2x00queue_create_tx_descriptor+0x380/0x490 [rt2x00lib]
       [<c0835733>] _raw_spin_lock+0x33/0x40
       [<f9979a20>] ? rt2x00queue_create_tx_descriptor+0x380/0x490 [rt2x00lib]
       [<f9979a20>] rt2x00queue_create_tx_descriptor+0x380/0x490 [rt2x00lib]
       [<f997a5cf>] rt2x00queue_update_beacon_locked+0x5f/0xb0 [rt2x00lib]
       [<f997a64d>] rt2x00queue_update_beacon+0x2d/0x50 [rt2x00lib]
       [<f9977e3a>] rt2x00mac_bss_info_changed+0x1ca/0x200 [rt2x00lib]
       [<f9977c70>] ? rt2x00mac_remove_interface+0x70/0x70 [rt2x00lib]
       [<f98e4dd0>] ieee80211_bss_info_change_notify+0xe0/0x1d0 [mac80211]
       [<f98ef7b8>] __ieee80211_sta_join_ibss+0x3b8/0x610 [mac80211]
       [<c0496ab4>] ? mark_held_locks+0x64/0xc0
       [<c0440012>] ? virt_efi_query_capsule_caps+0x12/0x50
       [<f98efb09>] ieee80211_sta_join_ibss+0xf9/0x140 [mac80211]
       [<f98f0456>] ieee80211_ibss_work+0x416/0x470 [mac80211]
       [<c0496d8b>] ? trace_hardirqs_on+0xb/0x10
       [<c077683b>] ? skb_dequeue+0x4b/0x70
       [<f98f207f>] ieee80211_iface_work+0x13f/0x230 [mac80211]
       [<c045cf99>] ? process_one_work+0x109/0x3f0
       [<c045d015>] process_one_work+0x185/0x3f0
       [<c045cf99>] ? process_one_work+0x109/0x3f0
       [<f98f1f40>] ? ieee80211_teardown_sdata+0xa0/0xa0 [mac80211]
       [<c045ed86>] worker_thread+0x116/0x270
       [<c045ec70>] ? manage_workers+0x1e0/0x1e0
       [<c0462f64>] kthread+0x84/0x90
       [<c0462ee0>] ? __init_kthread_worker+0x60/0x60
       [<c083d382>] kernel_thread_helper+0x6/0x10
      
      Cc: stable@vger.kernel.org
      Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
      Acked-by: NHelmut Schaa <helmut.schaa@googlemail.com>
      Acked-by: NGertjan van Wingerde <gwingerde@gmail.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      e5851dac
    • J
      brcmfmac: Fix likely misuse of | for & · f304a993
      Joe Perches 提交于
      Using | with a constant is always true.
      Likely this should have be &.
      Signed-off-by: NJoe Perches <joe@perches.com>
      Acked-by: NArend van Spriel <arend@broadcom.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      f304a993
    • J
      mac80211: Fix likely misuse of | for & · 5204267d
      Joe Perches 提交于
      Using | with a constant is always true.
      Likely this should have be &.
      
      cc: Ben Greear <greearb@candelatech.com>
      Signed-off-by: NJoe Perches <joe@perches.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      5204267d
    • F
      mac80211: add missing rcu_read_lock/unlock in agg-rx session timer · d8c7aae6
      Felix Fietkau 提交于
      Fixes a lockdep warning:
      
      ===================================================
      [ INFO: suspicious rcu_dereference_check() usage. ]
      ---------------------------------------------------
      net/mac80211/agg-rx.c:148 invoked rcu_dereference_check() without protection!
      
      other info that might help us debug this:
      
      rcu_scheduler_active = 1, debug_locks = 1
      1 lock held by arecord/11226:
       #0:  (&tid_agg_rx->session_timer){+.-...}, at: [<ffffffff81066bb0>] call_timer_fn+0x0/0x360
      
      stack backtrace:
      Pid: 11226, comm: arecord Not tainted 3.1.0-kml #16
      Call Trace:
       <IRQ>  [<ffffffff81093454>] lockdep_rcu_dereference+0xa4/0xc0
       [<ffffffffa02778c9>] sta_rx_agg_session_timer_expired+0xc9/0x110 [mac80211]
       [<ffffffffa0277800>] ? ieee80211_process_addba_resp+0x220/0x220 [mac80211]
       [<ffffffff81066c3a>] call_timer_fn+0x8a/0x360
       [<ffffffff81066bb0>] ? init_timer_deferrable_key+0x30/0x30
       [<ffffffff81477bb0>] ? _raw_spin_unlock_irq+0x30/0x70
       [<ffffffff81067049>] run_timer_softirq+0x139/0x310
       [<ffffffff81091d5e>] ? put_lock_stats.isra.25+0xe/0x40
       [<ffffffff810922ac>] ? lock_release_holdtime.part.26+0xdc/0x160
       [<ffffffffa0277800>] ? ieee80211_process_addba_resp+0x220/0x220 [mac80211]
       [<ffffffff8105cb78>] __do_softirq+0xc8/0x3c0
       [<ffffffff8108f088>] ? tick_dev_program_event+0x48/0x110
       [<ffffffff8108f16f>] ? tick_program_event+0x1f/0x30
       [<ffffffff81153b15>] ? putname+0x35/0x50
       [<ffffffff8147a43c>] call_softirq+0x1c/0x30
       [<ffffffff81004c55>] do_softirq+0xa5/0xe0
       [<ffffffff8105d1ee>] irq_exit+0xae/0xe0
       [<ffffffff8147ac6b>] smp_apic_timer_interrupt+0x6b/0x98
       [<ffffffff81479ab3>] apic_timer_interrupt+0x73/0x80
       <EOI>  [<ffffffff8146aac6>] ? free_debug_processing+0x1a1/0x1d5
       [<ffffffff81153b15>] ? putname+0x35/0x50
       [<ffffffff8146ab2b>] __slab_free+0x31/0x2ca
       [<ffffffff81477c3a>] ? _raw_spin_unlock_irqrestore+0x4a/0x90
       [<ffffffff81253b8f>] ? __debug_check_no_obj_freed+0x15f/0x210
       [<ffffffff81097054>] ? lock_release_nested+0x84/0xc0
       [<ffffffff8113ec55>] ? kmem_cache_free+0x105/0x250
       [<ffffffff81153b15>] ? putname+0x35/0x50
       [<ffffffff81153b15>] ? putname+0x35/0x50
       [<ffffffff8113ed8f>] kmem_cache_free+0x23f/0x250
       [<ffffffff81153b15>] putname+0x35/0x50
       [<ffffffff81146d8d>] do_sys_open+0x16d/0x1d0
       [<ffffffff81146e10>] sys_open+0x20/0x30
       [<ffffffff81478f42>] system_call_fastpath+0x16/0x1b
      Reported-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      d8c7aae6
    • J
      mac80211: clean up remain-on-channel on interface stop · 71ecfa18
      Johannes Berg 提交于
      When any interface goes down, it could be the one that we
      were doing a remain-on-channel with. We therefore need to
      cancel the remain-on-channel and flush the related work
      structs so they don't run after the interface has been
      removed or even destroyed.
      
      It's also possible in this case that an off-channel SKB
      was never transmitted, so free it if this is the case.
      Note that this can also happen if the driver finishes
      the off-channel period without ever starting it.
      
      Cc: stable@kernel.org
      Reported-by: NNirav Shah <nirav.j2.shah@intel.com>
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      71ecfa18
    • J
      mac80211_hwsim: advertise interface combinations · 1ae2fc25
      Johannes Berg 提交于
      Enforcing interface combinations broke uses of hwsim
      with multiple virtual interfaces. Advertise that all
      combinations are possible to fix this.
      Reported-by: NNirav Shah <nirav.j2.shah@intel.com>
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      1ae2fc25
    • M
      mac80211: fix error in station state transitions during reconfig · bd34ab62
      Meenakshi Venkataraman 提交于
      As part of hardware reconfig mac80211 tries
      to restore the station state to its values
      before the hardware reconfig, but it only
      goes to the last-state - 1. Fix this
      off-by-one error.
      
      Cc: stable@kernel.org [3.4]
      Signed-off-by: NMeenakshi Venkataraman <meenakshi.venkataraman@intel.com>
      Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      bd34ab62
    • J
      iwlwifi: fix TX power antenna access · a5fdde28
      Johannes Berg 提交于
      Since my commit
        iwlwifi: use valid TX/RX antenna from hw_params
      the config values are pure overrides, not the
      real values for all hardware. Therefore, the
      EEPROM TX power reading code checks the wrong
      values, it should check the hw_params values.
      
      Cc: stable@kernel.org [3.4]
      Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      a5fdde28
    • C
      mac80211: Fix Unreachable Mesh Station Problem when joining to another MBSS · b8bacc18
      Chun-Yeow Yeoh 提交于
      Mesh station that joins an MBSS is reachable using mesh portal with 6
      address frame by mesh stations from another MBSS if these two different
      MBSSes are bridged. However, if the mesh station later moves into the
      same MBSS of those mesh stations, it is unreachable by mesh stations
      in the MBSS due to the mpp_paths table is not deleted. A quick fix
      is to perform mesh_path_lookup, if it is available for the target
      destination, mpp_path_lookup is not performed. When the mesh station
      moves back to its original MBSS, the mesh_paths will be deleted once
      expired. So, it will be reachable using mpp_path_lookup again.
      Signed-off-by: NChun-Yeow Yeoh <yeohchunyeow@gmail.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      b8bacc18
    • A
      cfg80211: use sme_state in ibss start/join path · 28f33366
      Amitkumar Karwar 提交于
      CFG80211_DEV_WARN_ON() at "net/wireless/ibss.c line 63"
      is unnecessarily triggered even after successful connection,
      when cfg80211_ibss_joined() is called by driver inside
      .join_ibss handler.
      
      This patch fixes the problem by changing 'sme_state' in ibss path
      and having WARN_ON() check for 'sme_state' similar to infra
      association.
      Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
      Signed-off-by: NBing Zhao <bzhao@marvell.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      28f33366
    • A
      mwifiex: support NL80211_HIDDEN_SSID_ZERO_LEN for uAP · 7a1c9934
      Avinash Patil 提交于
      mwifiex uAP supports NL80211_HIDDEN_SSID_ZERO_LEN type of hidden
      SSID only. NL80211_HIDDEN_SSID_ZERO_CONTENTS is not supported.
      Signed-off-by: NAvinash Patil <patila@marvell.com>
      Signed-off-by: NKiran Divekar <dkiran@marvell.com>
      Signed-off-by: NBing Zhao <bzhao@marvell.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      7a1c9934
    • A
      mwifiex: invalidate bss config before setting channel for uAP · f0e3bd23
      Avinash Patil 提交于
      Mark bss_config parameters as invalid before setting AP channel.
      This prevents from setting invalid parameters while setting AP
      channel to FW.
      Signed-off-by: NAvinash Patil <patila@marvell.com>
      Signed-off-by: NKiran Divekar <dkiran@marvell.com>
      Signed-off-by: NBing Zhao <bzhao@marvell.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      f0e3bd23
    • S
      mac80211: run scan after finish connection monitoring · 925e64c3
      Stanislaw Gruszka 提交于
      commit 133d40f9
      Author: Stanislaw Gruszka <sgruszka@redhat.com>
      Date:   Wed Mar 28 16:01:19 2012 +0200
      
          mac80211: do not scan and monitor connection in parallel
      
      add bug, which make possible to start a scan and never finish it, so
      make every new scanning request finish with -EBUSY error. This can
      happen on code paths where we finish connection monitoring and clear
      IEEE80211_STA_*_POLL flags, but do not check if scan was deferred.
      This patch fixes those code paths.
      Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
      Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      925e64c3
  6. 03 6月, 2012 13 次提交
    • L
      Linux 3.5-rc1 · f8f5701b
      Linus Torvalds 提交于
      f8f5701b
    • L
      Merge tag 'dm-3.5-changes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm · 912afc36
      Linus Torvalds 提交于
      Pull device-mapper updates from Alasdair G Kergon:
       "Improve multipath's retrying mechanism in some defined circumstances
        and provide a simple reserve/release mechanism for userspace tools to
        access thin provisioning metadata while the pool is in use."
      
      * tag 'dm-3.5-changes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm:
        dm thin: provide userspace access to pool metadata
        dm thin: use slab mempools
        dm mpath: allow ioctls to trigger pg init
        dm mpath: delay retry of bypassed pg
        dm mpath: reduce size of struct multipath
      912afc36
    • J
      dm thin: provide userspace access to pool metadata · cc8394d8
      Joe Thornber 提交于
      This patch implements two new messages that can be sent to the thin
      pool target allowing it to take a snapshot of the _metadata_.  This,
      read-only snapshot can be accessed by userland, concurrently with the
      live target.
      
      Only one metadata snapshot can be held at a time.  The pool's status
      line will give the block location for the current msnap.
      
      Since version 0.1.5 of the userland thin provisioning tools, the
      thin_dump program displays the msnap as follows:
      
          thin_dump -m <msnap root> <metadata dev>
      
      Available here: https://github.com/jthornber/thin-provisioning-tools
      
      Now that userland can access the metadata we can do various things
      that have traditionally been kernel side tasks:
      
           i) Incremental backups.
      
           By using metadata snapshots we can work out what blocks have
           changed over time.  Combined with data snapshots we can ensure
           the data doesn't change while we back it up.
      
           A short proof of concept script can be found here:
      
           https://github.com/jthornber/thinp-test-suite/blob/master/incremental_backup_example.rb
      
           ii) Migration of thin devices from one pool to another.
      
           iii) Merging snapshots back into an external origin.
      
           iv) Asyncronous replication.
      Signed-off-by: NJoe Thornber <ejt@redhat.com>
      Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
      cc8394d8
    • M
      dm thin: use slab mempools · a24c2569
      Mike Snitzer 提交于
      Use dedicated caches prefixed with a "dm_" name rather than relying on
      kmalloc mempools backed by generic slab caches so the memory usage of
      thin provisioning (and any leaks) can be accounted for independently.
      Signed-off-by: NMike Snitzer <snitzer@redhat.com>
      Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
      a24c2569
    • M
      dm mpath: allow ioctls to trigger pg init · 35991652
      Mikulas Patocka 提交于
      After the failure of a group of paths, any alternative paths that
      need initialising do not become available until further I/O is sent to
      the device.  Until this has happened, ioctls return -EAGAIN.
      
      With this patch, new paths are made available in response to an ioctl
      too.  The processing of the ioctl gets delayed until this has happened.
      
      Instead of returning an error, we submit a work item to kmultipathd
      (that will potentially activate the new path) and retry in ten
      milliseconds.
      
      Note that the patch doesn't retry an ioctl if the ioctl itself fails due
      to a path failure.  Such retries should be handled intelligently by the
      code that generated the ioctl in the first place, noting that some SCSI
      commands should not be retried because they are not idempotent (XOR write
      commands).  For commands that could be retried, there is a danger that
      if the device rejected the SCSI command, the path could be errorneously
      marked as failed, and the request would be retried on another path which
      might fail too.  It can be determined if the failure happens on the
      device or on the SCSI controller, but there is no guarantee that all
      SCSI drivers set these flags correctly.
      Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
      Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
      35991652
    • M
      dm mpath: delay retry of bypassed pg · f220fd4e
      Mike Christie 提交于
      If I/O needs retrying and only bypassed priority groups are available,
      set the pg_init_delay_retry flag to wait before retrying.
      
      If, for example, the reason for the bypass is that the controller is
      getting reset or there is a firmware upgrade happening, retrying right
      away would cause a flood of log messages and retries for what could be a
      few seconds or even several minutes.
      Signed-off-by: NMike Christie <michaelc@cs.wisc.edu>
      Acked-by: NMike Snitzer <snitzer@redhat.com>
      Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
      f220fd4e
    • M
      dm mpath: reduce size of struct multipath · 1fbdd2b3
      Mike Snitzer 提交于
      Move multipath structure's 'lock' and 'queue_size' members to eliminate
      two 4-byte holes.  Also use a bit within a single unsigned int for each
      existing flag (saves 8-bytes).  This allows future flags to be added
      without each consuming an unsigned int.
      Signed-off-by: NMike Snitzer <snitzer@redhat.com>
      Acked-by: NHannes Reinecke <hare@suse.de>
      Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
      1fbdd2b3
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 4fc3acf2
      Linus Torvalds 提交于
      Pull networking updates from David Miller:
      
       1) Make syn floods consume significantly less resources by
      
          a) Not pre-COW'ing routing metrics for SYN/ACKs
          b) Mirroring the device queue mapping of the SYN for the SYN/ACK
             reply.
      
          Both from Eric Dumazet.
      
       2) Fix calculation errors in Byte Queue Limiting, from Hiroaki SHIMODA.
      
       3) Validate the length requested when building a paged SKB for a
          socket, so we don't overrun the page vector accidently.  From Jason
          Wang.
      
       4) When netlabel is disabled, we abort all IP option processing when we
          see a CIPSO option.  This isn't the right thing to do, we should
          simply skip over it and continue processing the remaining options
          (if any).  Fix from Paul Moore.
      
       5) SRIOV fixes for the mellanox driver from Jack orgenstein and Marcel
          Apfelbaum.
      
       6) 8139cp enables the receiver before the ring address is properly
          programmed, which potentially lets the device crap over random
          memory.  Fix from Jason Wang.
      
       7) e1000/e1000e fixes for i217 RST handling, and an improper buffer
          address reference in jumbo RX frame processing from Bruce Allan and
          Sebastian Andrzej Siewior, respectively.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        fec_mpc52xx: fix timestamp filtering
        mcs7830: Implement link state detection
        e1000e: fix Rapid Start Technology support for i217
        e1000: look into the page instead of skb->data for e1000_tbi_adjust_stats()
        r8169: call netif_napi_del at errpaths and at driver unload
        tcp: reflect SYN queue_mapping into SYNACK packets
        tcp: do not create inetpeer on SYNACK message
        8139cp/8139too: terminate the eeprom access with the right opmode
        8139cp: set ring address before enabling receiver
        cipso: handle CIPSO options correctly when NetLabel is disabled
        net: sock: validate data_len before allocating skb in sock_alloc_send_pskb()
        bql: Avoid possible inconsistent calculation.
        bql: Avoid unneeded limit decrement.
        bql: Fix POSDIFF() to integer overflow aware.
        net/mlx4_core: Fix obscure mlx4_cmd_box parameter in QUERY_DEV_CAP
        net/mlx4_core: Check port out-of-range before using in mlx4_slave_cap
        net/mlx4_core: Fixes for VF / Guest startup flow
        net/mlx4_en: Fix improper use of "port" parameter in mlx4_en_event
        net/mlx4_core: Fix number of EQs used in ICM initialisation
        net/mlx4_core: Fix the slave_id out-of-range test in mlx4_eq_int
      4fc3acf2
    • L
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 63004afa
      Linus Torvalds 提交于
      Pull straggler x86 fixes from Peter Anvin:
       "Three groups of patches:
      
        - EFI boot stub documentation and the ability to print error messages;
        - Removal for PTRACE_ARCH_PRCTL for x32 (obsolete interface which
          should never have been ported, and the port is broken and
          potentially dangerous.)
        - ftrace stack corruption fixes.  I'm not super-happy about the
          technical implementation, but it is probably the least invasive in
          the short term.  In the future I would like a single method for
          nesting the debug stack, however."
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86, x32, ptrace: Remove PTRACE_ARCH_PRCTL for x32
        x86, efi: Add EFI boot stub documentation
        x86, efi; Add EFI boot stub console support
        x86, efi: Only close open files in error path
        ftrace/x86: Do not change stacks in DEBUG when calling lockdep
        x86: Allow nesting of the debug stack IDT setting
        x86: Reset the debug_stack update counter
        ftrace: Use breakpoint method to update ftrace caller
        ftrace: Synchronize variable setting with breakpoints
      63004afa
    • L
      tty: Revert the tty locking series, it needs more work · f309532b
      Linus Torvalds 提交于
      This reverts the tty layer change to use per-tty locking, because it's
      not correct yet, and fixing it will require some more deep surgery.
      
      The main revert is d29f3ef3 ("tty_lock: Localise the lock"), but
      there are several smaller commits that built upon it, they also get
      reverted here. The list of reverted commits is:
      
        fde86d31 - tty: add lockdep annotations
        8f6576ad - tty: fix ldisc lock inversion trace
        d3ca8b64 - pty: Fix lock inversion
        b1d679af - tty: drop the pty lock during hangup
        abcefe5f - tty/amiserial: Add missing argument for tty_unlock()
        fd11b42e - cris: fix missing tty arg in wait_event_interruptible_tty call
        d29f3ef3 - tty_lock: Localise the lock
      
      The revert had a trivial conflict in the 68360serial.c staging driver
      that got removed in the meantime.
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f309532b
    • S
      fec_mpc52xx: fix timestamp filtering · 9ca3cc6f
      Stephan Gatzka 提交于
      skb_defer_rx_timestamp was called with a freshly allocated skb but must
      be called with rskb instead.
      Signed-off-by: NStephan Gatzka <stephan@gatzka.org>
      Cc: stable <stable@vger.kernel.org>
      Acked-by: NRichard Cochran <richardcochran@gmail.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      9ca3cc6f
    • O
      mcs7830: Implement link state detection · b1ff4f96
      Ondrej Zary 提交于
      Add .status callback that detects link state changes.
      Tested with MCS7832CV-AA chip (9710:7830, identified as rev.C by the driver).
      Fixes https://bugzilla.kernel.org/show_bug.cgi?id=28532Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b1ff4f96
    • L
      Merge 'for-linus' branches from git://git.kernel.org/pub/scm/linux/kernel/git/viro/{vfs,signal} · 233e562e
      Linus Torvalds 提交于
      Pull vfs fix and a fix from the signal changes for frv from Al Viro.
      
      The __kernel_nlink_t for powerpc got scrogged because 64-bit powerpc
      actually depended on the default "unsigned long", while 32-bit powerpc
      had an explicit override to "unsigned short".  Al didn't notice, and
      made both of them be the unsigned short.
      
      The frv signal fix is fallout from simplifying the do_notify_resume()
      code, and leaving an extra parenthesis.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        powerpc: Fix size of st_nlink on 64bit
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
        frv: Remove bogus closing parenthesis
      233e562e
  7. 02 6月, 2012 3 次提交