The initial state is UP and there is no way to enter the other states
as the required event type is never generated.  Delete all states,
event types, and other dead code.  The only thing left is handling
of the XID and TEST commands.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Previously I210/I211 followed the same code flow as 82580/I350 for 1588.
However, since the register sets have changed, we must update the
implementation to accommodate the register changes.

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

In rare circumstances, it's possible a descriptor writeback will occur
before a timestamped Tx packet will go out on the wire, leading to the
driver believing the hardware failed to timestamp the packet. Schedule a
work item for 82576 and use the available time sync interrupt registers
on 82580 and above to account for this.

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Change the name of the adapter in the PTP struct to enable easier
correlation between interface and PTP device.

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Update ethtool_get_ts_info to not report any supported functionality on
82575 and add support for V2 Sync and V2 Delay packets. In the case
where CONFIG_IGB_PTP is not defined, we should be reporting default
values.

v2: Correct the function to return EOPNOTSUPP when there is no PTP support
    or the device does not support PTP. Also fix minor whitespace issue.
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Where possible, move PTP-related functions into igb_ptp.c and update the
names of functions and variables to match the established coding style
in the files and specify that they are PTP-specific.

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Jeff Pieper  <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

For users without CONFIG_IGB_PTP=y, we should not be compiling any PTP
code into the driver. Tidy up the wrapping in igb to support this.

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Jeff Pieper  <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

John W. Linville says:

====================
This is another batch of updates intended for the 3.7 stream.

There are not a lot of large items, but iwlwifi, mwifiex, rt2x00,
ath9k, and brcmfmac all get some attention.  Wei Yongjun also provides
a series of small maintenance fixes.

This also includes a pull of the wireless tree in order to satisfy
some prerequisites for later patches.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Jerr Kirsher says:

> This series contains updates to igb (specifically PTP code).
Signed-off-by: David S. Miller <davem@davemloft.net>

Noticed that the byte and packet count statistics are under-
counting traffic handled by the DDP offload when there is more
than one DDP completion processed in a single call to
ixgbe_clean_rx_irq. This patch fixes that.

I tried to optimize the setting of the rss value so that it
only would have to be computed once, and only when there is
a DDP completion present.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Added the reg_ops file to debugfs with commands to read and write
a register to give users the ability to read and write individual
registers on the fly.
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Added the netdev_ops file to debugfs with a command to call the
ndo_tx_timeout function to give users the ability to simulate a
tx_timeout call made by the kernel.
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds debugfs support to the ixgbe driver to give
users the ability to access kernel information and to
simulate kernel events.

The filesystem is set up in the following driver/PCI-instance
hierarchy:
<debugfs>
   |-- ixgbe
	|-- PCI instance
	|	|-- attribute files
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Use %u instead of %d to display u32 variable.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Robert Garrett <RobertX.Garrett@intel.com>
Tested-by: Robert Garrett <RobertX.Garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

This change fixes the assumptions of the rate limiting code that previously
assumed that each VF would only ever have 2 queues.  This update makes it
so that we now use a queues per pool value that is determined based on the
VMDq feature mask.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-By: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Robert Garrett <RobertX.Garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

The PF was not correctly registering any of its VLANs.  As a result any
VLAN tagged traffic from the VF would not be delivered to the PF because
the VLAN was never assigned to the PF pool.

In addition the VF was not allowed to receive traffic from VLAN 0 if it was
allowed to receive untagged frames.  This change corrects that so that it
will correctly receive traffic from VLAN 0.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: Otto Estuardo Solares Cabrera <solca@galileo.edu>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Conflicts:
	net/netfilter/nfnetlink_log.c
	net/netfilter/xt_LOG.c

Rather easy conflict resolution, the 'net' tree had bug fixes to make
sure we checked if a socket is a time-wait one or not and elide the
logging code if so.

Whereas on the 'net-next' side we are calculating the UID and GID from
the creds using different interfaces due to the user namespace changes
from Eric Biederman.
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull GFS2 fixes from Steven Whitehouse:
 "Here are three GFS2 fixes for the current kernel tree.  These are all
  related to the block reservation code which was added at the merge
  window.  That code will be getting an update at the forthcoming merge
  window too.  In the mean time though there are a few smaller issues
  which should be fixed.

  The first patch resolves an issue with write sizes of greater than 32
  bits with the size hinting code.  The second ensures that the
  allocation data structure is initialised when using xattrs and the
  third takes into account allocations which may have been made by other
  nodes which affect a reservation on the local node."

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: Take account of blockages when using reserved blocks
  GFS2: Fix missing allocation data for set/remove xattr
  GFS2: Make write size hinting code common

Pull x86 platform driver updates from Matthew Garrett:
 "A few small updates for 3.6 - a trivial regression fix and a couple of
  conformance updates for the gmux driver, plus some tiny fixes for
  asus-wmi, eeepc-laptop and thinkpad_acpi."

* 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86:
  thinkpad_acpi: buffer overflow in fan_get_status()
  eeepc-laptop: fix device reference count leakage in eeepc_rfkill_hotplug()
  platform/x86: fix asus_laptop.wled_type description
  asus-laptop: HRWS/HWRS typo
  drivers-platform-x86: remove useless #ifdef CONFIG_ACPI_VIDEO
  apple-gmux: Fix port address calculation in gmux_pio_write32()
  apple-gmux: Fix index read functions
  apple-gmux: Obtain version info from indexed gmux

Pull i2c embedded fixes from Wolfram Sang:
 "The last bunch of (typical) i2c-embedded driver fixes for 3.6.

  Also update the MAINTAINERS file to point to my tree since people keep
  asking where to find their patches."

* 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux:
  i2c: algo: pca: Fix mode selection for PCA9665
  MAINTAINERS: fix tree for current i2c-embedded development
  i2c: mxs: correctly setup speed for non devicetree
  i2c: pnx: Fix read transactions of >= 2 bytes
  i2c: pnx: Fix bit definitions

Merge tag 'ecryptfs-3.6-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs

Pull ecryptfs fixes from Tyler Hicks:

 - Fixes a regression, introduced in 3.6-rc1, when a file is closed
   before its shared memory mapping is dirtied and unmapped.  The lower
   file was being released when the eCryptfs file was closed and the
   dirtied pages could not be written out.
 - Adds a call to the lower filesystem's ->flush() from
   ecryptfs_flush().
 - Fixes a regression, introduced in 2.6.39, when a file is renamed on
   top of another file.  The target file's inode was not being evicted
   and the space taken by the file was not reclaimed until eCryptfs was
   unmounted.

* tag 'ecryptfs-3.6-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
  eCryptfs: Copy up attributes of the lower target inode after rename
  eCryptfs: Call lower ->flush() from ecryptfs_flush()
  eCryptfs: Write out all dirty pages just before releasing the lower file

Pull one more DMA-mapping fix from Marek Szyprowski:
 "This patch fixes very subtle bug (typical off-by-one error) which
  might appear in very rare circumstances."

* 'fixes-for-3.6' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  arm: mm: fix DMA pool affiliation check

Pull hwmon fixes from Guenter Roeck:
 "Fix word size register read and write operations in ina2xx driver, and
  initialize uninitialized structure elements in twl4030-madc-hwmon
  driver."

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ina2xx) Fix word size register read and write operations
  hwmon: (twl4030-madc-hwmon) Initialize uninitialized structure elements

Pull drm fixes from Dave Airlie:
 "I realise this a bit bigger than I would want at this point.

  Exynos is a large chunk, I got them to half what they wanted already,
  and hey its ARM based, so not going to hurt many people.

  Radeon has only two fixes, but the PLL fixes were a bit bigger, but
  required for a lot of scenarios, the fence fix is really urgent.

  vmwgfx: I've pulled in a dumb ioctl support patch that I was going to
  shove in later and cc stable, but we need it asap, its mainly to stop
  mesa growing a really ugly dependency in userspace to run stuff on
  vmware, and if I don't stick it in the kernel now, everyone will have
  to ship ugly userspace libs to workaround it.

  nouveau: single urgent fix found in F18 testing, causes X to not start
  properly when f18 plymouth is used

  i915: smattering of fixes and debug quieting

  gma500: single regression fix

  So as I said a bit large, but its fairly well scattered and its all
  stuff I'll be shipping in F18's 3.6 kernel."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (26 commits)
  drm/nouveau: fix booting with plymouth + dumb support
  drm/radeon: make 64bit fences more robust v3
  drm/radeon: rework pll selection (v3)
  drm: Drop the NV12M and YUV420M formats
  drm/exynos: remove DRM_FORMAT_NV12M from plane module
  drm/exynos: fix double call of drm_prime_(init/destroy)_file_private
  drm/exynos: add dummy support for dmabuf-mmap
  drm/exynos: Add missing braces around sizeof in exynos_mixer.c
  drm/exynos: Add missing braces around sizeof in exynos_hdmi.c
  drm/exynos: Make g2d_pm_ops static
  drm/exynos: Add dependency for G2D in Kconfig
  drm/exynos: fixed page align bug.
  drm/exynos: Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(.. [1]
  drm/exynos: Use devm_* functions in exynos_drm_g2d.c file
  drm/exynos: Use devm_kzalloc in exynos_drm_hdmi.c file
  drm/exynos: Use devm_kzalloc in exynos_drm_vidi.c file
  drm/exynos: Remove redundant check in exynos_drm_fimd.c file
  drm/exynos: Remove redundant check in exynos_hdmi.c file
  vmwgfx: add dumb ioctl support
  gma500: Fix regression on Oaktrail devices
  ...

Pull scheduler fixes from Ingo Molnar:
 "Smaller fixlets"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix kernel-doc warnings in kernel/sched/fair.c
  sched: Unthrottle rt runqueues in __disable_runtime()
  sched: Add missing call to calc_load_exit_idle()
  sched: Fix load avg vs cpu-hotplug

Pull perf fixes from Ingo Molnar:
 "This tree includes various fixes"

Ingo really needs to improve on the whole "explain git pull" part.
"Various fixes" indeed.

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/hwpb: Invoke __perf_event_disable() if interrupts are already disabled
  perf/x86: Enable Intel Cedarview Atom suppport
  perf_event: Switch to internal refcount, fix race with close()
  oprofile, s390: Fix uninitialized memory access when writing to oprofilefs
  perf/x86: Fix microcode revision check for SNB-PEBS

Pull a core sparse warning fix from Ingo Molnar

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  mm/memblock: Use NULL instead of 0 for pointers

Pull networking fixes from David Miller:

 1) Use after free and new device IDs in bluetooth from Andre Guedes,
    Yevgeniy Melnichuk, Gustavo Padovan, and Henrik Rydberg.

 2) Fix crashes with short packet lengths and VLAN in pktgen, from
    Nishank Trivedi.

 3) mISDN calls flush_work_sync() with locks held, fix from Karsten
    Keil.

 4) Packet scheduler gred parameters are reported to userspace
    improperly scaled, and WRED idling is not performed correctly.  All
    from David Ward.

 5) Fix TCP socket refcount problem in ipv6, from Julian Anastasov.

 6) ibmveth device has RX queue alignment requirements which are not
    being explicitly met resulting in sporadic failures, fix from
    Santiago Leon.

 7) Netfilter needs to take care when interpreting sockets attached to
    socket buffers, they could be time-wait minisockets.  Fix from Eric
    Dumazet.

 8) sock_edemux() has the same issue as netfilter did in #7 above, fix
    from Eric Dumazet.

 9) Avoid infinite loops in CBQ scheduler with some configurations, from
    Eric Dumazet.

10) Deal with "Reflection scan: an Off-Path Attack on TCP", from Jozsef
    Kadlecsik.

11) SCTP overcharges socket for TX packets, fix from Thomas Graf.

12) CODEL packet scheduler should not reset it's state every time it
    builds a new flow, fix from Eric Dumazet.

13) Fix memory leak in nl80211, from Wei Yongjun.

14) NETROM doesn't check skb_copy_datagram_iovec() return values, from
    Alan Cox.

15) l2tp ethernet was using sizeof(ETH_HLEN) instead of plain ETH_HLEN,
    oops.  From Eric Dumazet.

16) Fix selection of ath9k chips on which PA linearization and AM2PM
    predistoration are used, from Felix Fietkau.

17) Flow steering settings in mlx4 driver need to be validated properly,
    from Hadar Hen Zion.

18) bnx2x doesn't show the correct link duplex setting, from Yaniv
    Rosner.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (75 commits)
  pktgen: fix crash with vlan and packet size less than 46
  bnx2x: Add missing afex code
  bnx2x: fix registers dumped
  bnx2x: correct advertisement of pause capabilities
  bnx2x: display the correct duplex value
  bnx2x: prevent timeouts when using PFC
  bnx2x: fix stats copying logic
  bnx2x: Avoid sending multiple statistics queries
  net: qmi_wwan: call subdriver with control intf only
  net_sched: gred: actually perform idling in WRED mode
  net_sched: gred: fix qave reporting via netlink
  net_sched: gred: eliminate redundant DP prio comparisons
  net_sched: gred: correct comment about qavg calculation in RIO mode
  mISDN: Fix wrong usage of flush_work_sync while holding locks
  netfilter: log: Fix log-level processing
  net-sched: sch_cbq: avoid infinite loop
  net: qmi_wwan: fix Gobi device probing for un2430
  net: fix net/core/sock.c build error
  ixp4xx_hss: fix build failure due to missing linux/module.h inclusion
  caif: move the dereference below the NULL test
  ...

Pull USB patches from Greg Kroah-Hartman:
 "Here are a number of USB patches, a bit more than I normally like this
  late in the -rc series, but given people's vacations (myself
  included), and the kernel summit, it seems to have happened this way.

  All are tiny, but they add up.  A number of gadget and xhci fixes, and
  a few new device ids.  All have been tested in linux-next.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'usb-3.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits)
  usb: chipidea: udc: don't stall endpoint if request list is empty in isr_tr_complete_low
  usb: chipidea: cleanup dma_pool if udc_start() fails
  usb: chipidea: udc: fix error path in udc_start()
  usb: chipidea: udc: add pullup fuction, needed by the uvc gadget
  usb: chipidea: udc: fix setup of endpoint maxpacket size
  USB: option: replace ZTE K5006-Z entry with vendor class rule
  EHCI: Update qTD next pointer in QH overlay region during unlink
  USB: cdc-wdm: fix wdm_find_device* return value
  USB: ftdi_sio: do not claim CDC ACM function
  usb: dwc3: gadget: fix pending isoc handling
  usb: renesas_usbhs: fixup DMA transport data alignment
  usb: gadget: at91udc: Don't check for ep->ep.desc
  usb: gadget: at91udc: don't overwrite driver data
  usb: dwc3: core: fix incorrect usage of resource pointer
  usb: musb: musbhsdma: fix IRQ check
  usb: musb: tusb6010: fix error path in tusb_probe()
  usb: musb: host: fix for musb_start_urb Oops
  usb: gadget: dummy_hcd: add support for USB_DT_BOS on rh
  usb: gadget: dummy_hcd: fixup error probe path
  usb: gadget: s3c-hsotg.c: fix error return code
  ...

Pull TTY fixes from Greg Kroah-Hartman:
 "Here are 2 tiny patches for a serial driver to resolve issues that
  people have reported with the 3.6-rc tree.

  Both of these have been in the linux-next tree for a while now.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'tty-3.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: serial: imx: don't reinit clock in imx_setup_ufcr()
  tty: serial: imx: console write routing is unsafe on SMP

Pull staging tree fixes from Greg Kroah-Hartman:
 "Here are a few staging tree fixes for problems that have been
  reported.

  Nothing major, just a number of tiny driver fixes.  All of these have
  been in the linux-next tree for a while.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'staging-3.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  drm/omap: add more new timings fields
  drm/omap: update for interlaced
  staging: r8712u: fix bug in r8712_recv_indicatepkt()
  staging: zcache: fix cleancache race condition with shrinker
  Staging: Android alarm: IOCTL command encoding fix
  staging: vt6656: [BUG] - Failed connection, incorrect endian.
  staging: ozwpan: fix memcmp() test in oz_set_active_pd()
  staging: wlan-ng: Fix problem with wrong arguments
  staging: comedi: das08: Correct AO output for das08jr-16-ao
  staging: comedi: das08: Correct AI encoding for das08jr-16-ao
  staging: comedi: das08: Fix PCI ref count
  staging: comedi: amplc_pci230: Fix PCI ref count
  staging: comedi: amplc_pc263: Fix PCI ref count
  staging: comedi: amplc_pc236: Fix PCI ref count
  staging: comedi: amplc_dio200: Fix PCI ref count
  staging: comedi: amplc_pci224: Fix PCI ref count
  drivers/iio/adc/at91_adc.c: adjust inconsistent IS_ERR and PTR_ERR
  staging iio: fix potential memory leak in lis3l02dq_ring.c
  staging:iio: prevent divide by zero bugs

Pull driver core fix from Greg Kroah-Hartman:
 "Here is one fix for 3.6-rc6 for the kobject.h file.

  It fixes a reported oops if CONFIG_HOTPLUG is disabled.  It's been in
  the linux-next tree for a while now.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'driver-core-3.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  kobject: fix oops with "input0: bad kobj_uevent_env content in show_uevent()"

We already use them for openat() and friends, but fstat() also wants to
be able to use O_PATH file descriptors.  This should make it more
directly comparable to the O_SEARCH of Solaris.

Note that you could already do the same thing with "fstatat()" and an
empty path, but just doing "fstat()" directly is simpler and faster, so
there is no reason not to just allow it directly.

See also commit 332a2e12, which did the same thing for fchdir, for
the same reasons.
Reported-by: ольга крыжановская <olga.kryzhanovska@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org    # O_PATH introduced in 3.0+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

After calling into the lower filesystem to do a rename, the lower target
inode's attributes were not copied up to the eCryptfs target inode. This
resulted in the eCryptfs target inode staying around, rather than being
evicted, because i_nlink was not updated for the eCryptfs inode. This
also meant that eCryptfs didn't do the final iput() on the lower target
inode so it stayed around, as well. This would result in a failure to
free up space occupied by the target file in the rename() operation.
Both target inodes would eventually be evicted when the eCryptfs
filesystem was unmounted.

This patch calls fsstack_copy_attr_all() after the lower filesystem
does its ->rename() so that important inode attributes, such as i_nlink,
are updated at the eCryptfs layer. ecryptfs_evict_inode() is now called
and eCryptfs can drop its final reference on the lower inode.

http://launchpad.net/bugs/561129Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Cc: <stable@vger.kernel.org> [2.6.39+]

Since eCryptfs only calls fput() on the lower file in
ecryptfs_release(), eCryptfs should call the lower filesystem's
->flush() from ecryptfs_flush().

If the lower filesystem implements ->flush(), then eCryptfs should try
to flush out any dirty pages prior to calling the lower ->flush(). If
the lower filesystem does not implement ->flush(), then eCryptfs has no
need to do anything in ecryptfs_flush() since dirty pages are now
written out to the lower filesystem in ecryptfs_release().
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>

Fixes a regression caused by:

821f7494 eCryptfs: Revert to a writethrough cache model

That patch reverted some code (specifically, 32001d6f) that was
necessary to properly handle open() -> mmap() -> close() -> dirty pages
-> munmap(), because the lower file could be closed before the dirty
pages are written out.

Rather than reapplying 32001d6f, this approach is a better way of
ensuring that the lower file is still open in order to handle writing
out the dirty pages. It is called from ecryptfs_release(), while we have
a lock on the lower file pointer, just before the lower file gets the
final fput() and we overwrite the pointer.

https://launchpad.net/bugs/1047261Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Artemy Tregubenko <me@arty.name>
Tested-by: Artemy Tregubenko <me@arty.name>
Tested-by: Colin Ian King <colin.king@canonical.com>