I've restricted atomic_open to only operate on regular files, although
I still don't understand why atomic_open should not be possible also for
directories on GFS2. That can always be added in later though, if it
makes sense.

The ->atomic_open function can be passed negative dentries, which
in most cases means either ENOENT (->lookup) or a call to d_instantiate
(->create). In the GFS2 case though, we need to actually perform the
look up, since we do not know whether there has been a new inode created
on another node. The look up calls d_splice_alias which then tries to
rehash the dentry - so the solution here is to simply check for that
in d_splice_alias. The same issue is likely to affect any other cluster
filesystem implementing ->atomic_open
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields fieldses org>
Cc: Jeff Layton <jlayton@redhat.com>

Creation of a new inode requires a directory search in order to ensure
that we are not trying to create an inode with the same name as an
existing one. This was hidden away inside the create_ok() function.

In the case that there was an existing inode, and a lookup can be
substituted for a create (which is the case with regular files
when the O_EXCL flag is not in use) then we were doing a second
lookup in order to return the inode.

This patch merges these two lookups into one. This can be done by
passing a flag to gfs2_dir_search() to tell it to just return -EEXIST
in the cases where we don't actually want to look up the inode.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

If kthread_run() fails, init_threads() returns
IS_ERR(p) instead of PTR_ERR(p).

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

This wrapper function is no longer required, so get rid of it.
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

Use PTR_RET in place of open coding this function.
Signed-off-by: NThomas Meyer <thomas@m3y3r.de>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

With recent changes to the transactions, it appears that we
are no longer using the "log ops" for resource groups. Since the
log commit code processes the array of log ops, eliminating this
should be marginally better for performance. Therefore this patch
eliminates it.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

This patch simply sort the data and metadata buffer lists by their
inplace block number.  This makes gfs2_log_flush issue the inplace IO
in sequential order, which will hopefully speed up writing the IO
out to disk.
Signed-off-by: NBenjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

Pull MMC fixes from Chris Ball:
 - sdhci-acpi: Fix initial runtime PM status, add more ACPI IDs
 - atmel-mci, omap_hsmmc: DT handling fixes
 - esdhc-imx: Fix SDIO IRQs, fix multiblock reads (both h/w errata)

* tag 'mmc-fixes-for-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case
  mmc: omap_hsmmc: convert to dma_request_slave_channel_compat
  mmc: omap_hsmmc: Fix the DT pbias workaround for MMC controllers 2 to 5
  mmc: sdhci-pci: add more device ids
  mmc: sdhci-acpi: add more device ids
  mmc: sdhci-acpi: fix initial runtime pm status
  mmc: atmel-mci: convert to dma_request_slave_channel_compat()
  mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53
  mmc: sdhci-esdhc-imx: Fix SDIO interrupts

Pull input fixes from Dmitry Torokhov:
 "Just a 2 small driver fixups here"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - fix a typo for Cintiq 22HDT
  Input: synaptics - fix sync lost after resume on some laptops

Pull kvm bugfixes from Gleb Natapov:
 "The bulk of the fixes is in MIPS KVM kernel<->userspace ABI.  MIPS KVM
  is new for 3.10 and some problems were found with current ABI.  It is
  better to fix them now and do not have a kernel with broken one"

* 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Fix race in apic->pending_events processing
  KVM: fix sil/dil/bpl/spl in the mod/rm fields
  KVM: Emulate multibyte NOP
  ARM: KVM: be more thorough when invalidating TLBs
  ARM: KVM: prevent NULL pointer dereferences with KVM VCPU ioctl
  mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.
  mips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG
  mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et_regs
  mips/kvm: Fix name of gpr field in struct kvm_regs.
  mips/kvm: Fix ABI for use of 64-bit registers.
  mips/kvm: Fix ABI for use of FPU.

Pull gfs2 fixes from Steven Whitehouse:
 "There are four patches this time.

  The first fixes a problem where the wrong descriptor type was being
  written into the log for journaled data blocks.

  The second fixes a race relating to the deallocation of allocator
  data.

  The third provides a fallback if kmalloc is unable to satisfy a
  request to allocate a directory hash table.

  The fourth fixes the iopen glock caching so that inodes are deleted in
  a more timely manner after rmdir/unlink"

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: Don't cache iopen glocks
  GFS2: Fall back to vmalloc if kmalloc fails for dir hash tables
  GFS2: Increase i_writecount during gfs2_setattr_size
  GFS2: Set log descriptor type for jdata blocks

Pull fuse fixes from Miklos Szeredi:
 "One patch fixes an Oops introduced in 3.9 with the readdirplus
  feature.  The rest are fixes for async-dio in 3.10"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix alignment in short read optimization for async_dio
  fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests
  fuse: fix readdirplus Oops in fuse_dentry_revalidate
  fuse: update inode size and invalidate attributes on fallocate
  fuse: truncate pagecache range on hole punch
  fuse: allocate for_background dio requests based on io->async state

Pull microblaze fixes from Michal Simek:
 "One is fixing warning reported by sparse and the second warning was
  reported by Geert in his build regressions/improvements status update
  for -rc4."

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Use static inline functions in cacheflush.h
  microblaze: Fix sparse warnings

And make the lines easier to read.
Signed-off-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In summary, the symptom is intermittent key events lost after resume
on some machines with synaptics touchpad (seems this is synaptics _only_),
and key events loss is due to serio port reconnect after psmouse sync lost.
Removing psmouse and inserting it back during the suspend/resume process
is able to work around the issue, so the difference between psmouse_connect()
and psmouse_reconnect() is the key to the root cause of this problem.

After comparing the two different paths, synaptics driver has its own
implementation of synaptics_reconnect(), and the missing psmouse_probe()
seems significant, the patch below added psmouse_probe() to the reconnect
process, and has been verified many times that the issue could not be reliably
reproduced.

There are two PS/2 commands in psmouse_probe():

  1. PSMOUSE_CMD_GETID
  2. PSMOUSE_CMD_RESET_DIS

Only the PSMOUSE_CMD_GETID seems to be significant. The
PSMOUSE_CMD_RESET_DIS is irrelevant to this issue after trying
several times.  So we have only implemented this patch to issue
the PSMOUSE_CMD_GETID so far.
Tested-by: NDaniel Manrique <daniel.manrique@canonical.com>
Signed-off-by: NJames M Leddy <james.leddy@canonical.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Pull regulator fixes from Mark Brown:
 "A few small fixes for v3.10, documentation things in the core and a
  few driver bugs."

* tag 'regulator-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: palmas: Fix "enable_reg" to point to the correct reg for SMPS10
  regulator: palmas: Fix incorrect condition
  regulator: core: Correct spelling mistake in comment
  regulator: dbx500: Make local symbol static
  regulator: Fix kernel-doc generation warnings.

Pull jfs bugfixes from David Kleikamp:
 "A couple jfs bug fixes for 3.10-rc5"

* tag 'jfs-3.10-rc5' of git://github.com/kleikamp/linux-shaggy:
  fs/jfs: Add check if journaling to disk has been disabled in lbmRead()
  jfs: Several bugs in jfs_freeze() and jfs_unfreeze()

This patch makes GFS2 immediately reclaim/delete all iopen glocks
as soon as they're dequeued. This allows deleters to get an
EXclusive lock on iopen so files are deleted properly instead of
being set as unlinked.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

This version has one more correction: the vmalloc calls are replaced
by __vmalloc calls to preserve the GFP_NOFS flag.

When GFS2's directory management code allocates buffers for a
directory hash table, if it can't get the memory it needs, it
currently gives a bad return code. Rather than giving an error,
this patch allows it to use virtual memory rather than kernel
memory for the hash table. This should make it possible for
directories to function properly, even when kernel memory becomes
very fragmented.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

This patch calls get_write_access in a few functions. This
merely increases inode->i_writecount for the duration of the function.
That will ensure that any file closes won't delete the inode's
multi-block reservation while the function is running.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

This patch sets the log descriptor type according to whether the
journal commit is for (journaled) data or metadata. This was
recently broken when the functions to process data and metadata
log ops were combined.
Signed-off-by: NBob Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

The bug was introduced with async_dio feature: trying to optimize short reads,
we cut number-of-bytes-to-read to i_size boundary. Hence the following example:

	truncate --size=300 /mnt/file
	dd if=/mnt/file of=/dev/null iflag=direct

led to FUSE_READ request of 300 bytes size. This turned out to be problem
for userspace fuse implementations who rely on assumption that kernel fuse
does not change alignment of request from client FS.

The patch turns off the optimization if async_dio is disabled. And, if it's
enabled, the patch fixes adjustment of number-of-bytes-to-read to preserve
alignment.

Note, that we cannot throw out short read optimization entirely because
otherwise a direct read of a huge size issued on a tiny file would generate
a huge amount of fuse requests and most of them would be ACKed by userspace
with zero bytes read.
Signed-off-by: NMaxim Patlasov <MPatlasov@parallels.com>
Reviewed-by: NBrian Foster <bfoster@redhat.com>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>

If request submission fails for an async request (i.e.,
get_user_pages() returns -ERESTARTSYS), we currently skip the
-EIOCBQUEUED return and drop into wait_for_sync_kiocb() forever.

Avoid this by always returning -EIOCBQUEUED for async requests. If
an error occurs, the error is passed into fuse_aio_complete(),
returned via aio_complete() and thus propagated to userspace via
io_getevents().
Signed-off-by: NBrian Foster <bfoster@redhat.com>
Reviewed-by: NMaxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>

Fix bug introduced by commit 4582a4ab "FUSE: Adapt readdirplus to application
usage patterns".

We need to check for a positive dentry; negative dentries are not added by
readdirplus.  Secondly we need to advise the use of readdirplus on the *parent*,
otherwise the whole thing is useless.  Thirdly all this is only relevant if
"readdirplus_auto" mode is selected by the filesystem.

We advise the use of readdirplus only if the dentry was still valid.  If we had
to redo the lookup then there was no use in doing the -plus version.
Reported-by: NBernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
CC: Feng Shuo <steve.shuo.feng@gmail.com>
CC: stable@vger.kernel.org

Using static inline functions ensure proper type checking
which also remove compilation warning for no MMU

Compilation warning:
arch/microblaze/include/asm/cacheflush.h: warning: 'addr'
 may be used uninitialized in this function [-Wmaybe-uninitialized]
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Pull m68k fix from Geert Uytterhoeven:
 "A boot lock-up on Mac, also destined for stable"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTK

Pull s390 fixes from Martin Schwidefsky:
 "Recent bug fixes, one of them touches a common code file.

  It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to
  override xlate_dev_kmem_ptr and xlate_dev_mem_ptr."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pgtable: Fix gmap notifier address
  s390/dasd: fix handling of gone paths
  s390/pgtable: Fix check for pgste/storage key handling
  arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()
  s390/smp: lost IPIs on cpu hotplug
  kernel: Fix s390 absolute memory access for /dev/mem
  s390/dma: do not call debug_dma after free

Pull cgroup fixes from Tejun Heo:

 - Fix for yet another xattr bug which may lead to NULL deref.

 - A subtle bug in for_each_descendant_pre().  This bug requires quite
   specific conditions to trigger and isn't too likely to actually
   happen in the wild, but maybe that just makes it that much more
   nastier.

 - A warning message added for silly cgroup re-mount (not -o remount,
   but unmount followed by mount) behavior.

* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: warn about mismatching options of a new mount of an existing hierarchy
  cgroup: fix a subtle bug in descendant pre-order walk
  cgroup: initialize xattr before calling d_instantiate()

Pull libata changes from Tejun Heo:
 "Nothing too interesting.  PCI ID additions, some sata_rcar fixes and a
  fringe bug fix for DMADIR handling which shouldn't affect any device
  remotely modern."

* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  sata_rcar: fix interrupt handling
  ahci: add an observed PCI ID for Marvell 88se9172 SATA controller
  sata_rcar: clear STOP bit in bmdma_start() method
  libata: make ata_exec_internal_sg honor DMADIR
  ata_piix: add PCI IDs for Intel BayTail
  libata: update "Maintained by:" tags

arch/microblaze/include/asm/uaccess.h:101:3:
 warning: cast removes address space of expression
arch/microblaze/include/asm/uaccess.h:107:2:
 warning: cast removes address space of expression
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

apic->pending_events processing has a race that may cause INIT and
SIPI
processing to be reordered:

vpu0:                            vcpu1:
set INIT
                               test_and_clear_bit(KVM_APIC_INIT)
                                  process INIT
set INIT
set SIPI
                               test_and_clear_bit(KVM_APIC_SIPI)
                                  process SIPI

At the end INIT is left pending in pending_events. The following patch
fixes this by latching pending event before processing them.
Signed-off-by: NGleb Natapov <gleb@redhat.com>

The x86-64 extended low-byte registers were fetched correctly from reg,
but not from mod/rm.

This fixes another bug in the boot of RHEL5.9 64-bit, but it is still
not enough.

Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NGleb Natapov <gleb@redhat.com>

This is encountered when booting RHEL5.9 64-bit.  There is another bug
after this one that is not a simple emulation failure, but this one lets
the boot proceed a bit.

Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NGleb Natapov <gleb@redhat.com>

The KVM/ARM MMU code doesn't take care of invalidating TLBs before
freeing a {pte,pmd} table. This could cause problems if the page
is reallocated and then speculated into by another CPU.
Reported-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NChristoffer Dall <cdall@cs.columbia.edu>

Some ARM KVM VCPU ioctls require the vCPU to be properly initialized
with the KVM_ARM_VCPU_INIT ioctl before being used with further
requests. KVM_RUN checks whether this initialization has been
done, but other ioctls do not.
Namely KVM_GET_REG_LIST will dereference an array with index -1
without initialization and thus leads to a kernel oops.
Fix this by adding checks before executing the ioctl handlers.

 [ Removed superflous comment from static function - Christoffer ]

Changes from v1:
 * moved check into a static function with a meaningful name
Signed-off-by: NAndre Przywara <andre.przywara@linaro.org>
Signed-off-by: NChristoffer Dall <cdall@cs.columbia.edu>

The Linux Way is to return -ENOIOCTLCMD to the vfs when an
unimplemented ioctl is requested.  Do this in kvm_mips instead of a
random mixture of -ENOTSUPP and -EINVAL.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Because not all 256 CP0 registers are ever implemented, we need a
different method of manipulating them.  Use the
KVM_SET_ONE_REG/KVM_GET_ONE_REG mechanism.

Now unused code and definitions are removed.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Also we cannot set special zero register, so force it to zero.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

All registers are 64-bits wide, 32-bit guests use the least
significant portion of the register storage fields.
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Acked-by: NSanjay Lal <sanjayl@kymasys.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>