61341 Commits

Author SHA1 Message Date
Linus Torvalds
d0048f0b91 MMC highlights for 3.12:
Core:
  - Support Allocation Units 8MB-64MB in SD3.0, previous max was 4MB.
  - The slot-gpio helper can now handle GPIO debouncing card-detect.
  - Read supported voltages from DT "voltage-ranges" property.
 
 Drivers:
  - dw_mmc: Add support for ARC architecture, and support exynos5420.
  - mmc_spi: Support CD/RO GPIOs.
  - sh_mobile_sdhi: Add compatibility for more Renesas SoCs.
  - sh_mmcif: Add DT support for DMA channels.
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Merge tag 'mmc-updates-for-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Pull MMC updates from Chris Ball:
 "MMC highlights for 3.12:

  Core:
   - Support Allocation Units 8MB-64MB in SD3.0, previous max was 4MB.
   - The slot-gpio helper can now handle GPIO debouncing card-detect.
   - Read supported voltages from DT "voltage-ranges" property.

  Drivers:
   - dw_mmc: Add support for ARC architecture, and support exynos5420.
   - mmc_spi: Support CD/RO GPIOs.
   - sh_mobile_sdhi: Add compatibility for more Renesas SoCs.
   - sh_mmcif: Add DT support for DMA channels"

* tag 'mmc-updates-for-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (50 commits)
  Revert "mmc: tmio-mmc: Remove .set_pwr() callback from platform data"
  mmc: dw_mmc: Add support for ARC
  mmc: sdhci-s3c: initialize host->quirks2 for using quirks2
  mmc: sdhci-s3c: fix the wrong register value, when clock is disabled
  mmc: esdhc: add support to get voltage from device-tree
  mmc: sdhci: get voltage from sdhc host
  mmc: core: parse voltage from device-tree
  mmc: omap_hsmmc: use the generic config for omap2plus devices
  mmc: omap_hsmmc: clear status flags before starting a new command
  mmc: dw_mmc: exynos: Add a new compatible string for exynos5420
  mmc: sh_mmcif: revision-specific CLK_CTRL2 handling
  mmc: sh_mmcif: revision-specific Command Completion Signal handling
  mmc: sh_mmcif: add support for Device Tree DMA bindings
  mmc: sh_mmcif: move header include from header into .c
  mmc: SDHI: add DT compatibility strings for further SoCs
  mmc: dw_mmc-pci: enable bus-mastering mode
  mmc: dw_mmc-pci: get resources from a proper BAR
  mmc: tmio-mmc: Remove .set_pwr() callback from platform data
  mmc: tmio-mmc: Remove .get_cd() callback from platform data
  mmc: sh_mobile_sdhi: Remove .set_pwr() callback from platform data
  ...
2013-09-10 13:33:09 -07:00
Linus Torvalds
7426d62871 Add the ability to collect I/O statistics on user-defined regions of a
device-mapper device.  This dm-stats code required the reintroduction of
 a div64_u64_rem() helper, but as a separate method that doesn't slow
 down div64_u64() -- especially on 32-bit systems.
 
 Allow the error target to replace request-based DM devices
 (e.g. multipath) in addition to bio-based DM devices.
 
 Various other small code fixes and improvements to thin-provisioning, DM
 cache and the DM ioctl interface.
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Merge tag 'dm-3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device-mapper updates from Mike Snitzer:
 "Add the ability to collect I/O statistics on user-defined regions of a
  device-mapper device.  This dm-stats code required the reintroduction
  of a div64_u64_rem() helper, but as a separate method that doesn't
  slow down div64_u64() -- especially on 32-bit systems.

  Allow the error target to replace request-based DM devices (e.g.
  multipath) in addition to bio-based DM devices.

  Various other small code fixes and improvements to thin-provisioning,
  DM cache and the DM ioctl interface"

* tag 'dm-3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm stripe: silence a couple sparse warnings
  dm: add statistics support
  dm thin: always return -ENOSPC if no_free_space is set
  dm ioctl: cleanup error handling in table_load
  dm ioctl: increase granularity of type_lock when loading table
  dm ioctl: prevent rename to empty name or uuid
  dm thin: set pool read-only if breaking_sharing fails block allocation
  dm thin: prefix pool error messages with pool device name
  dm: allow error target to replace bio-based and request-based targets
  math64: New separate div64_u64_rem helper
  dm space map: optimise sm_ll_dec and sm_ll_inc
  dm btree: prefetch child nodes when walking tree for a dm_btree_del
  dm btree: use pop_frame in dm_btree_del to cleanup code
  dm cache: eliminate holes in cache structure
  dm cache: fix stacking of geometry limits
  dm thin: fix stacking of geometry limits
  dm thin: add data block size limits to Documentation
  dm cache: add data block size limits to code and Documentation
  dm cache: document metadata device is exclussive to a cache
  dm: stop using WQ_NON_REENTRANT
2013-09-10 13:06:15 -07:00
Linus Torvalds
4d7696f1b0 md update for v3.12
Headline item is multithreading for RAID5 so that more
 IO/sec can be supported on fast (SSD) devices.
 Also TILE-Gx SIMD suppor for RAID6 calculations and an
 assortment of bug fixes.
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Merge tag 'md/3.12' of git://neil.brown.name/md

Pull md update from Neil Brown:
 "Headline item is multithreading for RAID5 so that more IO/sec can be
  supported on fast (SSD) devices.  Also TILE-Gx SIMD suppor for RAID6
  calculations and an assortment of bug fixes"

* tag 'md/3.12' of git://neil.brown.name/md:
  raid5: only wakeup necessary threads
  md/raid5: flush out all pending requests before proceeding with reshape.
  md/raid5: use seqcount to protect access to shape in make_request.
  raid5: sysfs entry to control worker thread number
  raid5: offload stripe handle to workqueue
  raid5: fix stripe release order
  raid5: make release_stripe lockless
  md: avoid deadlock when dirty buffers during md_stop.
  md: Don't test all of mddev->flags at once.
  md: Fix apparent cut-and-paste error in super_90_validate
  raid6/test: replace echo -e with printf
  RAID: add tilegx SIMD implementation of raid6
  md: fix safe_mode buglet.
  md: don't call md_allow_write in get_bitmap_file.
2013-09-10 13:03:41 -07:00
Linus Torvalds
b05430fc93 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 3 (of many) from Al Viro:
 "Waiman's conversion of d_path() and bits related to it,
  kern_path_mountpoint(), several cleanups and fixes (exportfs
  one is -stable fodder, IMO).

  There definitely will be more...  ;-/"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  split read_seqretry_or_unlock(), convert d_walk() to resulting primitives
  dcache: Translating dentry into pathname without taking rename_lock
  autofs4 - fix device ioctl mount lookup
  introduce kern_path_mountpoint()
  rename user_path_umountat() to user_path_mountpoint_at()
  take unlazy_walk() into umount_lookup_last()
  Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
  prune_super(): sb->s_op is never NULL
  exportfs: don't assume that ->iterate() won't feed us too long entries
  afs: get rid of redundant ->d_name.len checks
2013-09-10 12:44:24 -07:00
Dave Airlie
48016851c8 Merge tag 'drm-intel-fixes-2013-09-06' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
- Early stolen mem reservation from Jesse in x86 boot code. Acked by Ingo
  and hpa.  This was ready much earlier but somehow I've thought it'd go
  in through x86 trees, hence why this is late. Avoids the pci resource
  code to plant mmiobars in the middle of stolen mem and other ugliness.
- vgaarb improvements from Alex Williamson plus the fix from Ville for the
  vgacon->fbcon smooth transition "feature".
- Render pageflips on ivb/hsw to avoid stalls due to the ring switching
  when only flipping on the blitter (Chris).
- Deadlock fixes around our flush_workqueue which crept back in - lockdep
  isn't clever enough :(
- Shrinker recursion fix from Chris - this is the thing that blew the vma
  patches from Ben I've taken out of 3.12.
- Fixup for the relocation refactoring. Also an igt testcase to make sure
  we don't break this again.
- Pile of smaller fixups all over, shortlog has full details.

* tag 'drm-intel-fixes-2013-09-06' of git://people.freedesktop.org/~danvet/drm-intel: (29 commits)
  drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done
  drm/i915: try not to lose backlight CBLV precision
  drm/i915: Confine page flips to BCS on Valleyview
  drm/i915: Skip stolen region initialisation if none is reserved
  drm/i915: fix gpu hang vs. flip stall deadlocks
  drm/i915: Hold an object reference whilst we shrink it
  drm/i915: fix i9xx_crtc_clock_get for multiplied pixels
  drm/i915: handle sdvo input pixel multiplier correctly again
  drm/i915: fix hpd work vs. flush_work in the pageflip code deadlock
  drm/i915: fix up the relocate_entry refactoring
  drm/i915: Fix pipe config warnings when dealing with LVDS fixed mode
  drm/i915: Don't call sg_free_table() if sg_alloc_table() fails
  i915: Update VGA arbiter support for newer devices
  vgaarb: Fix VGA decodes changes
  vgaarb: Don't disable resources that are not owned
  drm/i915: Pin pages whilst mapping the dma-buf
  drm/i915: enable trickle feed on Haswell
  x86: add early quirk for reserving Intel graphics stolen memory v5
  drm/i915: split PCI IDs out into i915_drm.h v4
  i915_gem: Convert kmem_cache_alloc(...GFP_ZERO) to kmem_cache_zalloc
  ...
2013-09-10 12:36:55 +10:00
Linus Torvalds
26b0332e30 dmaengine update for 3.12
Collection of random updates to the core and some end-driver fixups for
 ioatdma and mv_xor:
 * NUMA aware channel allocation
 * Cleanup dmatest debugfs interface
 * ioat: make raid-support Atom only
 * mv_xor: big endian
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Merge tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

Pull dmaengine update from Dan Williams:
 "Collection of random updates to the core and some end-driver fixups
  for ioatdma and mv_xor:
   - NUMA aware channel allocation
   - Cleanup dmatest debugfs interface
   - ioat: make raid-support Atom only
   - mv_xor: big endian

  Aside from the top three commits these have all had some soak time in
  -next.  The top commit fixes a recent build breakage.

  It has been a long while since my last pull request, hopefully it does
  not show.  Thanks to Vinod for keeping an eye on drivers/dma/ this
  past year"

* tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
  dmaengine: dma_sync_wait and dma_find_channel undefined
  MAINTAINERS: update email for Dan Williams
  dma: mv_xor: Fix incorrect error path
  ioatdma: silence GCC warnings
  dmaengine: make dma_channel_rebalance() NUMA aware
  dmaengine: make dma_submit_error() return an error code
  ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
  mv_xor: support big endian systems using descriptor swap feature
  mv_xor: use {readl, writel}_relaxed instead of __raw_{readl, writel}
  dmatest: print message on debug level in case of no error
  dmatest: remove IS_ERR_OR_NULL checks of debugfs calls
  dmatest: make module parameters writable
2013-09-09 18:07:15 -07:00
Rafael J. Wysocki
798282a871 Revert "cpufreq: make sure frequency transitions are serialized"
Commit 7c30ed5 (cpufreq: make sure frequency transitions are
serialized) attempted to serialize frequency transitions by
adding checks to the CPUFREQ_PRECHANGE and CPUFREQ_POSTCHANGE
notifications.  However, it assumed that the notifications will
always originate from the driver's .target() callback, but they
also can be triggered by cpufreq_out_of_sync() and that leads to
warnings like this on some systems:

 WARNING: CPU: 0 PID: 14543 at drivers/cpufreq/cpufreq.c:317
 __cpufreq_notify_transition+0x238/0x260()
 In middle of another frequency transition

accompanied by a call trace similar to this one:

 [<ffffffff81720daa>] dump_stack+0x46/0x58
 [<ffffffff8106534c>] warn_slowpath_common+0x8c/0xc0
 [<ffffffff815b8560>] ? acpi_cpufreq_target+0x320/0x320
 [<ffffffff81065436>] warn_slowpath_fmt+0x46/0x50
 [<ffffffff815b1ec8>] __cpufreq_notify_transition+0x238/0x260
 [<ffffffff815b33be>] cpufreq_notify_transition+0x3e/0x70
 [<ffffffff815b345d>] cpufreq_out_of_sync+0x6d/0xb0
 [<ffffffff815b370c>] cpufreq_update_policy+0x10c/0x160
 [<ffffffff815b3760>] ? cpufreq_update_policy+0x160/0x160
 [<ffffffff81413813>] cpufreq_set_cur_state+0x8c/0xb5
 [<ffffffff814138df>] processor_set_cur_state+0xa3/0xcf
 [<ffffffff8158e13c>] thermal_cdev_update+0x9c/0xb0
 [<ffffffff8159046a>] step_wise_throttle+0x5a/0x90
 [<ffffffff8158e21f>] handle_thermal_trip+0x4f/0x140
 [<ffffffff8158e377>] thermal_zone_device_update+0x57/0xa0
 [<ffffffff81415b36>] acpi_thermal_check+0x2e/0x30
 [<ffffffff81415ca0>] acpi_thermal_notify+0x40/0xdc
 [<ffffffff813e7dbd>] acpi_device_notify+0x19/0x1b
 [<ffffffff813f8241>] acpi_ev_notify_dispatch+0x41/0x5c
 [<ffffffff813e3fbe>] acpi_os_execute_deferred+0x25/0x32
 [<ffffffff81081060>] process_one_work+0x170/0x4a0
 [<ffffffff81082121>] worker_thread+0x121/0x390
 [<ffffffff81082000>] ? manage_workers.isra.20+0x170/0x170
 [<ffffffff81088fe0>] kthread+0xc0/0xd0
 [<ffffffff81088f20>] ? flush_kthread_worker+0xb0/0xb0
 [<ffffffff8173582c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81088f20>] ? flush_kthread_worker+0xb0/0xb0

For this reason, revert commit 7c30ed5 along with the fix 266c13d
(cpufreq: Fix serialization of frequency transitions) on top of it
and we will revisit the serialization problem later.

Reported-by: Alessandro Bono <alessandro.bono@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-09-10 02:54:50 +02:00
Srivatsa S. Bhat
56d07db274 cpufreq: Remove temporary fix for race between CPU hotplug and sysfs-writes
Commit "cpufreq: serialize calls to __cpufreq_governor()" had been a temporary
and partial solution to the race condition between writing to a cpufreq sysfs
file and taking a CPU offline. Now that we have a proper and complete solution
to that problem, remove the temporary fix.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-09-10 02:49:47 +02:00
Viresh Kumar
19c763031a cpufreq: serialize calls to __cpufreq_governor()
We can't take a big lock around __cpufreq_governor() as this causes
recursive locking for some cases. But calls to this routine must be
serialized for every policy. Otherwise we can see some unpredictable
events.

For example, consider following scenario:

__cpufreq_remove_dev()
 __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
   policy->governor->governor(policy, CPUFREQ_GOV_STOP);
    cpufreq_governor_dbs()
     case CPUFREQ_GOV_STOP:
      mutex_destroy(&cpu_cdbs->timer_mutex)
      cpu_cdbs->cur_policy = NULL;
  <PREEMPT>
store()
 __cpufreq_set_policy()
  __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
    policy->governor->governor(policy, CPUFREQ_GOV_LIMITS);
     case CPUFREQ_GOV_LIMITS:
      mutex_lock(&cpu_cdbs->timer_mutex); <-- Warning (destroyed mutex)
       if (policy->max < cpu_cdbs->cur_policy->cur) <- cur_policy == NULL

And so store() will eventually result in a crash if cur_policy is
NULL at this point.

Introduce an additional variable which would guarantee serialization
here.

Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-09-10 02:49:46 +02:00
Jon Mason
4a43f394a0 dmaengine: dma_sync_wait and dma_find_channel undefined
dma_sync_wait and dma_find_channel are declared regardless of whether
CONFIG_DMA_ENGINE is enabled, but calling the function without
CONFIG_DMA_ENGINE enabled results "undefined reference" errors.

To get around this, declare dma_sync_wait and dma_find_channel as inline
functions if CONFIG_DMA_ENGINE is undefined.

Signed-off-by: Jon Mason <jon.mason@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-09-09 17:02:38 -07:00
Linus Torvalds
6404141718 ARM: SoC late changes for v3.12
These are changes that arrived a little late before the merge window,
 or had dependencies on previous branches.
 
 Highlights:
 - ux500: misc. cleanup, fixup I2C devices
 - exynos: DT updates for RTC; PM updates
 - at91: DT updates for NAND; new platforms added to generic defconfig
 - sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
 - highbank: LPAE fixes, select necessary ARM errata
 - omap: PM fixes and improvements; OMAP5 mailbox support
 - omap: basic support for new DRA7xx SoCs
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Merge tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late changes from Kevin Hilman:
 "These are changes that arrived a little late before the merge window,
  or had dependencies on previous branches.

  Highlights:
   - ux500: misc.  cleanup, fixup I2C devices
   - exynos: DT updates for RTC; PM updates
   - at91: DT updates for NAND; new platforms added to generic defconfig
   - sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
   - highbank: LPAE fixes, select necessary ARM errata
   - omap: PM fixes and improvements; OMAP5 mailbox support
   - omap: basic support for new DRA7xx SoCs"

* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
  ARM: dts: vexpress: Add CCI node to TC2 device-tree
  ARM: EXYNOS: Skip C1 cpuidle state for exynos5440
  ARM: EXYNOS: always enable PM domains support for EXYNOS4X12
  ARM: highbank: clean-up some unused includes
  ARM: sun7i: Enable the A20 clocks in the DTSI
  ARM: sun6i: Enable clock support in the DTSI
  ARM: sun5i: dt: Use the A10s gates in the DTSI
  ARM: at91: at91_dt_defconfig: enable rm9200 support
  ARM: dts: add ADC device tree node for exynos5420/5250
  ARM: dts: Add RTC DT node to Exynos5420 SoC
  ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC
  ARM: dts: Fix the RTC DT node name for Exynos5250
  irqchip: mmp: avoid to include irqs head file
  ARM: mmp: avoid to include head file in mach-mmp
  irqchip: mmp: support irqchip
  irqchip: move mmp irq driver
  ARM: OMAP: AM33xx: clock: Add RNG clock data
  ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
  ARM: OMAP4: clock: Lock PLLs in the right sequence
  ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
  ...
2013-09-09 16:35:29 -07:00
Linus Torvalds
a35c6322e5 ARM: SoC drivers for v3.12
This branch contains ARM SoC related driver updates for v3.12.  The
 only thing this cycle are core PM updates and CPUidle support for
 ARM's TC2 big.LITTLE development platform.
 
 Conflicts:
 
 One cleanup/reorg conflict with a new entry in
 drivers/cpuidle/Makefile.  Append the new entry after the existing
 ones.  A follow up patch for v3.12-rc will make the new entry conform
 to the cleanup/reorg.
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Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver update from Kevin Hilman:
 "This contains the ARM SoC related driver updates for v3.12.  The only
  thing this cycle are core PM updates and CPUidle support for ARM's TC2
  big.LITTLE development platform"

* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  cpuidle: big.LITTLE: vexpress-TC2 CPU idle driver
  ARM: vexpress: tc2: disable GIC CPU IF in tc2_pm_suspend
  drivers: irq-chip: irq-gic: introduce gic_cpu_if_down()
2013-09-09 16:08:13 -07:00
Linus Torvalds
bef4a0ab98 The common clk framework changes for 3.12 are dominated by clock driver
patches, both new drivers and fixes to existing. A high percentage of
 these are for Samsung platforms like Exynos. Core framework fixes and
 some new features like automagical clock re-parenting round out the
 patches.
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Merge tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux

Pull clock framework changes from Michael Turquette:
 "The common clk framework changes for 3.12 are dominated by clock
  driver patches, both new drivers and fixes to existing.  A high
  percentage of these are for Samsung platforms like Exynos.  Core
  framework fixes and some new features like automagical clock
  re-parenting round out the patches"

* tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux: (102 commits)
  clk: only call get_parent if there is one
  clk: samsung: exynos5250: Simplify registration of PLL rate tables
  clk: samsung: exynos4: Register PLL rate tables for Exynos4x12
  clk: samsung: exynos4: Register PLL rate tables for Exynos4210
  clk: samsung: exynos4: Reorder registration of mout_vpllsrc
  clk: samsung: pll: Add support for rate configuration of PLL46xx
  clk: samsung: pll: Use new registration method for PLL46xx
  clk: samsung: pll: Add support for rate configuration of PLL45xx
  clk: samsung: pll: Use new registration method for PLL45xx
  clk: samsung: exynos4: Rename exynos4_plls to exynos4x12_plls
  clk: samsung: exynos4: Remove checks for DT node
  clk: samsung: exynos4: Remove unused static clkdev aliases
  clk: samsung: Modify _get_rate() helper to use __clk_lookup()
  clk: samsung: exynos4: Use separate aliases for cpufreq related clocks
  clocksource: samsung_pwm_timer: Get clock from device tree
  ARM: dts: exynos4: Specify PWM clocks in PWM node
  pwm: samsung: Update DT bindings documentation to cover clocks
  clk: Move symbol export to proper location
  clk: fix new_parent dereference before null check
  clk: wm831x: Initialise wm831x pointer on init
  ...
2013-09-09 15:49:04 -07:00
Nicholas Bellinger
0123a9ec6a target: Add MAXIMUM COMPARE AND WRITE LENGTH in Block Limits VPD
This patch adds the MAXIMUM COMPARE AND WRITE LENGTH bit, currently
hardcoded to a single logical block (NoLB=1) within the Block Limits
VPD in spc_emulate_evpd_b0().

Also add emulate_caw device attribute in configfs (enabled by default)
to allow the exposure of this bit to be disabled, if necessary.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:35 -07:00
Nicholas Bellinger
76dde50ebe target: Make __target_execute_cmd() available as extern
Required by COMPARE_AND_WRITE for write instance user-data
submission, in order to bypass target_execute_cmd() checks.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:34 -07:00
Nicholas Bellinger
47e459e622 target: Add transport_reset_sgl_orig() for COMPARE_AND_WRITE
After COMPARE_AND_WRITE completes it's comparision, the WRITE
payload SGLs head expect to be updated to point from the verify
instance of user data, to the write instance of user data.

So for this special case, add transport_reset_sgl_orig() usage
within transport_free_pages() and add se_cmd->t_data_[sg,nents]_orig
members to save the original assignments.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:33 -07:00
Nicholas Bellinger
a82a9538dd target: Allow sbc_ops->execute_rw() to accept SGLs + data_direction
COMPARE_AND_WRITE expects to be able to send down a DMA_FROM_DEVICE
to obtain the necessary READ payload for comparision against the
first half of the WRITE payload containing the verify user data.

Currently virtual backends expect to internally reference SGLs,
SGL nents, and data_direction, so change IBLOCK, FILEIO and RD
sbc_ops->execute_rw() to accept this values as function parameters.

Also add default sbc_execute_rw() handler for the typical case for
cmd->execute_rw() submission using cmd->t_data_sg, cmd->t_data_nents,
and cmd->data_direction).

v2 Changes:
  - Add SCF_COMPARE_AND_WRITE command flag
  - Use sbc_execute_rw() for normal cmd->execute_rw() submission
    with expected se_cmd members.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:28 -07:00
Nicholas Bellinger
818b571ca0 target: Add TCM_MISCOMPARE_VERIFY sense handling
This patch adds TCM_MISCOMPARE_VERIFY (ASC=0x1d, ASCQ=0x00) sense
handling to transport_send_check_condition_and_sense(), which is
required for a COMPARE_AND_WRITE comparision failure.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:27 -07:00
Nicholas Bellinger
a6b0133c19 target: Add return for se_cmd->transport_complete_callback
This patch adds a sense_reason_t return to ->transport_complete_callback(),
and updates target_complete_ok_work() to invoke the call if necessary to
transport_send_check_condition_and_sense() during the failure case.

Also update xdreadwrite_callback() to use this return value.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:26 -07:00
Nicholas Bellinger
1c68cc1626 scsi: Add CDB definition for COMPARE_AND_WRITE
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:24 -07:00
Nicholas Bellinger
d703ce2f7f iscsi/iser-target: Convert to command priv_size usage
This command converts iscsi/isert-target to use allocations based on
iscsit_transport->priv_size within iscsit_allocate_cmd(), instead of
using an embedded isert_cmd->iscsi_cmd.

This includes removing iscsit_transport->alloc_cmd() usage, along
with updating isert-target code to use iscsit_priv_cmd().

Also, remove left-over iscsit_transport->release_cmd() usage for
direct calls to iscsit_release_cmd(), and drop the now unused
lio_cmd_cache and isert_cmd_cache.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-09 14:29:21 -07:00
Nicholas Bellinger
c0add7fd05 target: Add transport_init_session_tags using per-cpu ida
This patch adds lib/idr.c based transport_init_session_tags() logic
that allows fabric drivers to setup a per-cpu se_sess->sess_tag_pool
and associated se_sess->sess_cmd_map for basic tagged pre-allocation
of fabric descriptor sized memory.

v5 changes:
  - Convert to percpu_ida.h include

v4 changes:
  - Add transport_alloc_session_tags() for fabrics that need early
    transport_init_session()

v3 changes:
  - Update to percpu-ida usage

Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Asias He <asias@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-09 14:29:16 -07:00
Kent Overstreet
798ab48eec idr: Percpu ida
Percpu frontend for allocating ids. With percpu allocation (that works),
it's impossible to guarantee it will always be possible to allocate all
nr_tags - typically, some will be stuck on a remote percpu freelist
where the current job can't get to them.

We do guarantee that it will always be possible to allocate at least
(nr_tags / 2) tags - this is done by keeping track of which and how many
cpus have tags on their percpu freelists. On allocation failure if
enough cpus have tags that there could potentially be (nr_tags / 2) tags
stuck on remote percpu freelists, we then pick a remote cpu at random to
steal from.

Note that there's no cpu hotplug notifier - we don't care, because
steal_tags() will eventually get the down cpu's tags. We _could_ satisfy
more allocations if we had a notifier - but we'll still meet our
guarantees and it's absolutely not a correctness issue, so I don't think
it's worth the extra code.

From akpm:

    "It looks OK to me (that's as close as I get to an ack :))

v6 changes:
  - Add #include <linux/cpumask.h> to include/linux/percpu_ida.h to
    make alpha/arc builds happy (Fengguang)
  - Move second (cpu >= nr_cpu_ids) check inside of first check scope
    in steal_tags() (akpm + nab)

v5 changes:
  - Change percpu_ida->cpus_have_tags to cpumask_t (kmo + akpm)
  - Add comment for percpu_ida_cpu->lock + ->nr_free (kmo + akpm)
  - Convert steal_tags() to use cpumask_weight() + cpumask_next() +
    cpumask_first() + cpumask_clear_cpu() (kmo + akpm)
  - Add comment for alloc_global_tags() (kmo + akpm)
  - Convert percpu_ida_alloc() to use cpumask_set_cpu() (kmo + akpm)
  - Convert percpu_ida_free() to use cpumask_set_cpu() (kmo + akpm)
  - Drop percpu_ida->cpus_have_tags allocation in percpu_ida_init()
    (kmo + akpm)
  - Drop percpu_ida->cpus_have_tags kfree in percpu_ida_destroy()
    (kmo + akpm)
  - Add comment for percpu_ida_alloc @ gfp (kmo + akpm)
  - Move to percpu_ida.c + percpu_ida.h (kmo + akpm + nab)

v4 changes:

  - Fix tags.c reference in percpu_ida_init (akpm)

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-09 14:29:15 -07:00
Linus Torvalds
300893b08f xfs: update for v3.12-rc1
For 3.12-rc1 there are a number of bugfixes in addition to work to ease usage
 of shared code between libxfs and the kernel, the rest of the work to enable
 project and group quotas to be used simultaneously, performance optimisations
 in the log and the CIL, directory entry file type support, fixes for log space
 reservations, some spelling/grammar cleanups, and the addition of user
 namespace support.
 
 - introduce readahead to log recovery
 - add directory entry file type support
 - fix a number of spelling errors in comments
 - introduce new Q_XGETQSTATV quotactl for project quotas
 - add USER_NS support
 - log space reservation rework
 - CIL optimisations
 - kernel/userspace libxfs rework
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Merge tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs

Pull xfs updates from Ben Myers:
 "For 3.12-rc1 there are a number of bugfixes in addition to work to
  ease usage of shared code between libxfs and the kernel, the rest of
  the work to enable project and group quotas to be used simultaneously,
  performance optimisations in the log and the CIL, directory entry file
  type support, fixes for log space reservations, some spelling/grammar
  cleanups, and the addition of user namespace support.

   - introduce readahead to log recovery
   - add directory entry file type support
   - fix a number of spelling errors in comments
   - introduce new Q_XGETQSTATV quotactl for project quotas
   - add USER_NS support
   - log space reservation rework
   - CIL optimisations
  - kernel/userspace libxfs rework"

* tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs: (112 commits)
  xfs: XFS_MOUNT_QUOTA_ALL needed by userspace
  xfs: dtype changed xfs_dir2_sfe_put_ino to xfs_dir3_sfe_put_ino
  Fix wrong flag ASSERT in xfs_attr_shortform_getvalue
  xfs: finish removing IOP_* macros.
  xfs: inode log reservations are too small
  xfs: check correct status variable for xfs_inobt_get_rec() call
  xfs: inode buffers may not be valid during recovery readahead
  xfs: check LSN ordering for v5 superblocks during recovery
  xfs: btree block LSN escaping to disk uninitialised
  XFS: Assertion failed: first <= last && last < BBTOB(bp->b_length), file: fs/xfs/xfs_trans_buf.c, line: 568
  xfs: fix bad dquot buffer size in log recovery readahead
  xfs: don't account buffer cancellation during log recovery readahead
  xfs: check for underflow in xfs_iformat_fork()
  xfs: xfs_dir3_sfe_put_ino can be static
  xfs: introduce object readahead to log recovery
  xfs: Simplify xfs_ail_min() with list_first_entry_or_null()
  xfs: Register hotcpu notifier after initialization
  xfs: add xfs sb v4 support for dirent filetype field
  xfs: Add write support for dirent filetype field
  xfs: Add read-only support for dirent filetype field
  ...
2013-09-09 11:19:09 -07:00
Josh Durgin
dd935f44a4 libceph: add function to ensure notifies are complete
Without a way to flush the osd client's notify workqueue, a watch
event that is unregistered could continue receiving callbacks
indefinitely.

Unregistering the event simply means no new notifies are added to the
queue, but there may still be events in the queue that will call the
watch callback for the event. If the queue is flushed after the event
is unregistered, the caller can be sure no more watch callbacks will
occur for the canceled watch.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2013-09-09 11:15:49 -07:00
Linus Torvalds
ef9a61bef9 - factor out common code from MTD tests
- nand-gpio cleanup and portability to non-ARM
  - m25p80 support for 4-byte addressing chips, other new chips
  - pxa3xx cleanup and support for new platforms
  - remove obsolete alauda, octagon-5066 drivers
  - erase/write support for bcm47xxsflash
  - improve detection of ECC requirements for NAND, controller setup
  - NFC acceleration support for atmel-nand, read/write via SRAM
  - etc.
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Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd

Pull mtd updates from David Woodhouse:
 - factor out common code from MTD tests
 - nand-gpio cleanup and portability to non-ARM
 - m25p80 support for 4-byte addressing chips, other new chips
 - pxa3xx cleanup and support for new platforms
 - remove obsolete alauda, octagon-5066 drivers
 - erase/write support for bcm47xxsflash
 - improve detection of ECC requirements for NAND, controller setup
 - NFC acceleration support for atmel-nand, read/write via SRAM
 - etc

* tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd: (184 commits)
  mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
  mtd: ofpart: use for_each_child_of_node() macro
  mtd: mtdswap: replace strict_strtoul() with kstrtoul()
  mtd cs553x_nand: use kzalloc() instead of memset
  mtd: atmel_nand: fix error return code in atmel_nand_probe()
  mtd: bcm47xxsflash: writing support
  mtd: bcm47xxsflash: implement erasing support
  mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exit
  mtd: bcm47xxsflash: convert kzalloc to avoid invalid access
  mtd: remove alauda driver
  mtd: nand: mxc_nand: mark 'const' properly
  mtd: maps: cfi_flagadm: add missing __iomem annotation
  mtd: spear_smi: add missing __iomem annotation
  mtd: r852: Staticize local symbols
  mtd: nandsim: Staticize local symbols
  mtd: impa7: add missing __iomem annotation
  mtd: sm_ftl: Staticize local symbols
  mtd: m25p80: add support for mr25h10
  mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable
  mtd: m25p80: Pass flags through CAT25_INFO macro
  ...
2013-09-09 10:33:19 -07:00
Linus Torvalds
64c353864e Merge branch 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping
Pull DMA mapping update from Marek Szyprowski:
 "This contains an addition of Device Tree support for reserved memory
  regions (Contiguous Memory Allocator is one of the drivers for it) and
  changes required by the KVM extensions for PowerPC architectue"

* 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
  ARM: init: add support for reserved memory defined by device tree
  drivers: of: add initialization code for dma reserved memory
  drivers: of: add function to scan fdt nodes given by path
  drivers: dma-contiguous: clean source code and prepare for device tree
2013-09-09 10:26:33 -07:00
Linus Torvalds
d75671e36e VFIO updates include safer default file flags for VFIO device fds,
an external user interface exported to allow other modules to hold
 references to VFIO groups, a fix to test for extended config space
 on PCIe and PCI-x, and new hot reset interfaces for PCI devices
 which allows the user to do PCI bus/slot resets when all of the
 devices affected by the reset are owned by the user.
 
 For this last feature, the PCI bus reset interface, I depend on
 changes already merged from Bjorn's PCI pull request.  I therefore
 merged my tree up to commit cb3e433, which I think was the correct
 action, but as Stephen Rothwell noted, I failed to provide a commit
 message indicating why the merge was required.  Sorry for that.
 Thanks,
 Alex
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Merge tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio

Pull VFIO update from Alex Williamson:
 "VFIO updates include safer default file flags for VFIO device fds, an
  external user interface exported to allow other modules to hold
  references to VFIO groups, a fix to test for extended config space on
  PCIe and PCI-x, and new hot reset interfaces for PCI devices which
  allows the user to do PCI bus/slot resets when all of the devices
  affected by the reset are owned by the user.

  For this last feature, the PCI bus reset interface, I depend on
  changes already merged from Bjorn's PCI pull request.  I therefore
  merged my tree up to commit cb3e433, which I think was the correct
  action, but as Stephen Rothwell noted, I failed to provide a commit
  message indicating why the merge was required.  Sorry for that.
  Thanks, Alex"

* tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio:
  vfio: fix documentation
  vfio-pci: PCI hot reset interface
  vfio-pci: Test for extended config space
  vfio-pci: Use fdget() rather than eventfd_fget()
  vfio: Add O_CLOEXEC flag to vfio device fd
  vfio: use get_unused_fd_flags(0) instead of get_unused_fd()
  vfio: add external user support
2013-09-09 10:19:36 -07:00
Linus Torvalds
bf97293eb8 NFS client updates for Linux 3.12
Highlights include:
 
 - Fix NFSv4 recovery so that it doesn't recover lost locks in cases such as
   lease loss due to a network partition, where doing so may result in data
   corruption. Add a kernel parameter to control choice of legacy behaviour
   or not.
 - Performance improvements when 2 processes are writing to the same file.
 - Flush data to disk when an RPCSEC_GSS session timeout is imminent.
 - Implement NFSv4.1 SP4_MACH_CRED state protection to prevent other
   NFS clients from being able to manipulate our lease and file lockingr
   state.
 - Allow sharing of RPCSEC_GSS caches between different rpc clients
 - Fix the broken NFSv4 security auto-negotiation between client and server
 - Fix rmdir() to wait for outstanding sillyrename unlinks to complete
 - Add a tracepoint framework for debugging NFSv4 state recovery issues.
 - Add tracing to the generic NFS layer.
 - Add tracing for the SUNRPC socket connection state.
 - Clean up the rpc_pipefs mount/umount event management.
 - Merge more patches from Chuck in preparation for NFSv4 migration support.
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Merge tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Highlights include:

   - Fix NFSv4 recovery so that it doesn't recover lost locks in cases
     such as lease loss due to a network partition, where doing so may
     result in data corruption.  Add a kernel parameter to control
     choice of legacy behaviour or not.
   - Performance improvements when 2 processes are writing to the same
     file.
   - Flush data to disk when an RPCSEC_GSS session timeout is imminent.
   - Implement NFSv4.1 SP4_MACH_CRED state protection to prevent other
     NFS clients from being able to manipulate our lease and file
     locking state.
   - Allow sharing of RPCSEC_GSS caches between different rpc clients.
   - Fix the broken NFSv4 security auto-negotiation between client and
     server.
   - Fix rmdir() to wait for outstanding sillyrename unlinks to complete
   - Add a tracepoint framework for debugging NFSv4 state recovery
     issues.
   - Add tracing to the generic NFS layer.
   - Add tracing for the SUNRPC socket connection state.
   - Clean up the rpc_pipefs mount/umount event management.
   - Merge more patches from Chuck in preparation for NFSv4 migration
     support"

* tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (107 commits)
  NFSv4: use mach cred for SECINFO_NO_NAME w/ integrity
  NFS: nfs_compare_super shouldn't check the auth flavour unless 'sec=' was set
  NFSv4: Allow security autonegotiation for submounts
  NFSv4: Disallow security negotiation for lookups when 'sec=' is specified
  NFSv4: Fix security auto-negotiation
  NFS: Clean up nfs_parse_security_flavors()
  NFS: Clean up the auth flavour array mess
  NFSv4.1 Use MDS auth flavor for data server connection
  NFS: Don't check lock owner compatability unless file is locked (part 2)
  NFS: Don't check lock owner compatibility in writes unless file is locked
  nfs4: Map NFS4ERR_WRONG_CRED to EPERM
  nfs4.1: Add SP4_MACH_CRED write and commit support
  nfs4.1: Add SP4_MACH_CRED stateid support
  nfs4.1: Add SP4_MACH_CRED secinfo support
  nfs4.1: Add SP4_MACH_CRED cleanup support
  nfs4.1: Add state protection handler
  nfs4.1: Minimal SP4_MACH_CRED implementation
  SUNRPC: Replace pointer values with task->tk_pid and rpc_clnt->cl_clid
  SUNRPC: Add an identifier for struct rpc_clnt
  SUNRPC: Ensure rpc_task->tk_pid is available for tracepoints
  ...
2013-09-09 09:19:15 -07:00
Linus Torvalds
6cccc7d301 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull ceph updates from Sage Weil:
 "This includes both the first pile of Ceph patches (which I sent to
  torvalds@vger, sigh) and a few new patches that add support for
  fscache for Ceph.  That includes a few fscache core fixes that David
  Howells asked go through the Ceph tree.  (Thanks go to Milosz Tanski
  for putting this feature together)

  This first batch of patches (included here) had (has) several
  important RBD bug fixes, hole punch support, several different
  cleanups in the page cache interactions, improvements in the truncate
  code (new truncate mutex to avoid shenanigans with i_mutex), and a
  series of fixes in the synchronous striping read/write code.

  On top of that is a random collection of small fixes all across the
  tree (error code checks and error path cleanup, obsolete wq flags,
  etc)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (43 commits)
  ceph: use d_invalidate() to invalidate aliases
  ceph: remove ceph_lookup_inode()
  ceph: trivial buildbot warnings fix
  ceph: Do not do invalidate if the filesystem is mounted nofsc
  ceph: page still marked private_2
  ceph: ceph_readpage_to_fscache didn't check if marked
  ceph: clean PgPrivate2 on returning from readpages
  ceph: use fscache as a local presisent cache
  fscache: Netfs function for cleanup post readpages
  FS-Cache: Fix heading in documentation
  CacheFiles: Implement interface to check cache consistency
  FS-Cache: Add interface to check consistency of a cached object
  rbd: fix null dereference in dout
  rbd: fix buffer size for writes to images with snapshots
  libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc
  rbd: fix I/O error propagation for reads
  ceph: use vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem
  ceph: allow sync_read/write return partial successed size of read/write.
  ceph: fix bugs about handling short-read for sync read mode.
  ceph: remove useless variable revoked_rdcache
  ...
2013-09-09 09:13:22 -07:00
Kuninori Morimoto
34e4447515 ASoC: rsnd: fixup flag name of rsnd_scu_platform_info
it should be *USE*, not *USB*

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-09 16:06:20 +01:00
Al Viro
2d86465101 introduce kern_path_mountpoint()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-08 20:20:23 -04:00
Al Viro
197df04c74 rename user_path_umountat() to user_path_mountpoint_at()
... and move the extern from linux/namei.h to fs/internal.h,
along with that of vfs_path_lookup().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-08 20:20:21 -04:00
Linus Torvalds
8aab6a2733 vfs: reorganize dput() memory accesses
This is me being a bit OCD after all the dentry optimization work this
merge window: profiles end up showing 'dput()' as a rather expensive
operation, and there were two unrelated bad reasons for that.

The first reason was reading d_lockref.count for debugging purposes,
which touches the lockref cacheline (for reads) before really need to.
More importantly, the debugging test in question is _wrong_, and has
hidden bugs.  It's true that we can only sleep when the count goes down
to zero, but the test as-is hides the much more subtle bug that happens
if we race with somebody else deleting the file.

Anyway we _will_ touch that cacheline, but let's do it for a write and
in the right routine (ie in "lockref_put_or_lock()") which annotates the
costs better.  So remove the misleading debug code.

The other was an unnecessary access to the cacheline that contains the
d_lru list, just to check whether we already were on the LRU list or
not.  This is exactly what we have d_flags for, so that we can avoid
touching extra cache lines for the common case.  So just add another bit
for "is this dentry on the LRU".

Finally, mark the tests properly likely/unlikely, so that the common
fast-paths are dense in the instruction stream.

This makes the profiles look much saner.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-08 13:26:18 -07:00
Scott Lovenberg
cdf1246ffb cifs: Move and expand MAX_SERVER_SIZE definition
MAX_SERVER_SIZE has been moved to cifs_mount.h and renamed
CIFS_NI_MAXHOST for clarity.  It has been expanded to 1024 as the
previous value of 16 was very short.

Signed-off-by: Scott Lovenberg <scott.lovenberg@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2013-09-08 14:34:22 -05:00
Scott Lovenberg
54fcf270de cifs: Expand max share name length to 256
The old max share name length limit was 80 due to Windows NET SHARE
command not allowing more than that.  However, share names can be much
longer.  This is a more reasonable maximum share name length.

Signed-off-by: Scott Lovenberg <scott.lovenberg@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2013-09-08 14:34:17 -05:00
Scott Lovenberg
8c3a2b4c42 cifs: Move string length definitions to uapi
The max string length definitions for user name, domain name, password,
and share name have been moved into their own header file in uapi so the
mount helper can use autoconf to define them instead of keeping the
kernel side and userland side definitions in sync manually.  The names
have also been standardized with a "CIFS" prefix and "LEN" suffix.

Signed-off-by: Scott Lovenberg <scott.lovenberg@gmail.com>
Reviewed-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2013-09-08 14:34:11 -05:00
Linus Torvalds
b409624ad5 Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVM Express driver update from Matthew Wilcox.

* git://git.infradead.org/users/willy/linux-nvme:
  NVMe: Merge issue on character device bring-up
  NVMe: Handle ioremap failure
  NVMe: Add pci suspend/resume driver callbacks
  NVMe: Use normal shutdown
  NVMe: Separate controller init from disk discovery
  NVMe: Separate queue alloc/free from create/delete
  NVMe: Group pci related actions in functions
  NVMe: Disk stats for read/write commands only
  NVMe: Bring up cdev on set feature failure
  NVMe: Fix checkpatch issues
  NVMe: Namespace IDs are unsigned
  NVMe: Update nvme_id_power_state with latest spec
  NVMe: Split header file into user-visible and kernel-visible pieces
  NVMe: Call nvme_process_cq from submission path
  NVMe: Remove "process_cq did something" message
  NVMe: Return correct value from interrupt handler
  NVMe: Disk IO statistics
  NVMe: Restructure MSI / MSI-X setup
  NVMe: Use kzalloc instead of kmalloc+memset
2013-09-07 20:19:02 -07:00
Linus Torvalds
8de4651abe For the 3.12 merge window we have one new driver for the DA9063 PMIC
from Dialog Semiconductor.
 
 Besides that driver we also have:
 
 - Device tree support for the s2mps11 driver
 
 - More devm_* conversion for the pm8921, max89xx, menelaus, tps65010,
   wl1273 and pcf50633-adc drivers.
 
 - A conversion to threaded IRQ and IRQ domain for the twl6030 driver.
 
 - A fairly big update for the rtsx driver: Better power saving support,
   better vendor settings handling, and a few fixes.
 
 - Support for a couple more boards (COMe-bHL6 and COMe-cTH6) for the
   Kontron driver.
 
 - A conversion to the dev_get_platdata() API for all MFD drivers.
 
 - A removal of non-DT (legacy) support for the twl6040 driver.
 
 - A few fixes and additions (Mic detect level) to the wm5110 register tables.
 
 - Regmap support for the davinci_voicecodec driver.
 
 - The usual bunch of minor cleanups and janitorial fixes.
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Merge tag 'mfd-3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next

Pull MFD (multi-function device) updates from Samuel Ortiz:
 "For the 3.12 merge window we have one new driver for the DA9063 PMIC
  from Dialog Semiconductor.

  Besides that driver we also have:

   - Device tree support for the s2mps11 driver

   - More devm_* conversion for the pm8921, max89xx, menelaus, tps65010,
     wl1273 and pcf50633-adc drivers.

   - A conversion to threaded IRQ and IRQ domain for the twl6030 driver.

   - A fairly big update for the rtsx driver: Better power saving
     support, better vendor settings handling, and a few fixes.

   - Support for a couple more boards (COMe-bHL6 and COMe-cTH6) for the
     Kontron driver.

   - A conversion to the dev_get_platdata() API for all MFD drivers.

   - A removal of non-DT (legacy) support for the twl6040 driver.

   - A few fixes and additions (Mic detect level) to the wm5110 register
     tables.

   - Regmap support for the davinci_voicecodec driver.

   - The usual bunch of minor cleanups and janitorial fixes"

* tag 'mfd-3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next: (81 commits)
  mfd: ucb1x00-core: Rewrite ucb1x00_add_dev()
  mfd: ab8500-debugfs: Apply a check for -ENOMEM after allocating memory for event name
  mfd: ab8500-debugfs: Apply a check for -ENOMEM after allocating memory for sysfs
  mfd: timberdale: Use module_pci_driver
  mfd: timberdale: Remove redundant break
  mfd: timberdale: Staticize local variables
  mfd: ab8500-debugfs: Staticize local variables
  mfd: db8500-prcmu: Staticize clk_mgt
  mfd: db8500-prcmu: Use ANSI function declaration
  mfd: omap-usb-host: Staticize usbhs_driver_name
  mfd: 88pm805: Fix potential NULL pdata dereference
  mfd: 88pm800: Fix potential NULL pdata dereference
  mfd: twl6040: Use regmap for register cache
  mfd: davinci_voicecodec: Provide a regmap for register I/O
  mfd: davinci_voicecodec: Remove unused read and write functions
  mmc: memstick: rtsx: Modify copyright comments
  mmc: rtsx: Clear SD_CLK toggle enable bit if switching voltage fail
  mfd: mmc: rtsx: Change default tx phase
  mfd: pcf50633-adc: Use devm_*() functions
  mfd: rtsx: Copyright modifications
  ...
2013-09-07 20:14:19 -07:00
Al Viro
4e10f3c988 Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c
kernel/cgroup.c is the only place in the tree that relies on eventfd.h
pulling file.h; move that include there.  Switch from eventfd_fget()/fput()
to fdget()/fdput(), while we are at it - eventfd_ctx_fileget() will fail
on non-eventfd descriptors just fine, no need to do that check twice...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-09-07 19:54:57 -04:00
Linus Torvalds
e7d33bb5ea lockref: add ability to mark lockrefs "dead"
The only actual current lockref user (dcache) uses zero reference counts
even for perfectly live dentries, because it's a cache: there may not be
any users, but that doesn't mean that we want to throw away the dentry.

At the same time, the dentry cache does have a notion of a truly "dead"
dentry that we must not even increment the reference count of, because
we have pruned it and it is not valid.

Currently that distinction is not visible in the lockref itself, and the
dentry cache validation uses "lockref_get_or_lock()" to either get a new
reference to a dentry that already had existing references (and thus
cannot be dead), or get the dentry lock so that we can then verify the
dentry and increment the reference count under the lock if that
verification was successful.

That's all somewhat complicated.

This adds the concept of being "dead" to the lockref itself, by simply
using a count that is negative.  This allows a usage scenario where we
can increment the refcount of a dentry without having to validate it,
and pushing the special "we killed it" case into the lockref code.

The dentry code itself doesn't actually use this yet, and it's probably
too late in the merge window to do that code (the dentry_kill() code
with its "should I decrement the count" logic really is pretty complex
code), but let's introduce the concept at the lockref level now.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-07 15:49:18 -07:00
Linus Torvalds
dc0755cdb1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 2 (of many) from Al Viro:
 "Mostly Miklos' series this time"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  constify dcache.c inlined helpers where possible
  fuse: drop dentry on failed revalidate
  fuse: clean up return in fuse_dentry_revalidate()
  fuse: use d_materialise_unique()
  sysfs: use check_submounts_and_drop()
  nfs: use check_submounts_and_drop()
  gfs2: use check_submounts_and_drop()
  afs: use check_submounts_and_drop()
  vfs: check unlinked ancestors before mount
  vfs: check submounts and drop atomically
  vfs: add d_walk()
  vfs: restructure d_genocide()
2013-09-07 14:36:57 -07:00
Linus Torvalds
c7c4591db6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace changes from Eric Biederman:
 "This is an assorted mishmash of small cleanups, enhancements and bug
  fixes.

  The major theme is user namespace mount restrictions.  nsown_capable
  is killed as it encourages not thinking about details that need to be
  considered.  A very hard to hit pid namespace exiting bug was finally
  tracked and fixed.  A couple of cleanups to the basic namespace
  infrastructure.

  Finally there is an enhancement that makes per user namespace
  capabilities usable as capabilities, and an enhancement that allows
  the per userns root to nice other processes in the user namespace"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  userns:  Kill nsown_capable it makes the wrong thing easy
  capabilities: allow nice if we are privileged
  pidns: Don't have unshare(CLONE_NEWPID) imply CLONE_THREAD
  userns: Allow PR_CAPBSET_DROP in a user namespace.
  namespaces: Simplify copy_namespaces so it is clear what is going on.
  pidns: Fix hang in zap_pid_ns_processes by sending a potentially extra wakeup
  sysfs: Restrict mounting sysfs
  userns: Better restrictions on when proc and sysfs can be mounted
  vfs: Don't copy mount bind mounts of /proc/<pid>/ns/mnt between namespaces
  kernel/nsproxy.c: Improving a snippet of code.
  proc: Restrict mounting the proc filesystem
  vfs: Lock in place mounts from more privileged users
2013-09-07 14:35:32 -07:00
Linus Torvalds
11c7b03d42 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris:
 "Nothing major for this kernel, just maintenance updates"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (21 commits)
  apparmor: add the ability to report a sha1 hash of loaded policy
  apparmor: export set of capabilities supported by the apparmor module
  apparmor: add the profile introspection file to interface
  apparmor: add an optional profile attachment string for profiles
  apparmor: add interface files for profiles and namespaces
  apparmor: allow setting any profile into the unconfined state
  apparmor: make free_profile available outside of policy.c
  apparmor: rework namespace free path
  apparmor: update how unconfined is handled
  apparmor: change how profile replacement update is done
  apparmor: convert profile lists to RCU based locking
  apparmor: provide base for multiple profiles to be replaced at once
  apparmor: add a features/policy dir to interface
  apparmor: enable users to query whether apparmor is enabled
  apparmor: remove minimum size check for vmalloc()
  Smack: parse multiple rules per write to load2, up to PAGE_SIZE-1 bytes
  Smack: network label match fix
  security: smack: add a hash table to quicken smk_find_entry()
  security: smack: fix memleak in smk_write_rules_list()
  xattr: Constify ->name member of "struct xattr".
  ...
2013-09-07 14:34:07 -07:00
Linus Torvalds
6be48f2940 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
 "Here is the crypto update for 3.12:

   - Added MODULE_SOFTDEP to allow pre-loading of modules.
   - Reinstated crct10dif driver using the module softdep feature.
   - Allow via rng driver to be auto-loaded.

   - Split large input data when necessary in nx.
   - Handle zero length messages correctly for GCM/XCBC in nx.
   - Handle SHA-2 chunks bigger than block size properly in nx.

   - Handle unaligned lengths in omap-aes.
   - Added SHA384/SHA512 to omap-sham.
   - Added OMAP5/AM43XX SHAM support.
   - Added OMAP4 TRNG support.

   - Misc fixes"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (66 commits)
  Reinstate "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework"
  hwrng: via - Add MODULE_DEVICE_TABLE
  crypto: fcrypt - Fix bitoperation for compilation with clang
  crypto: nx - fix SHA-2 for chunks bigger than block size
  crypto: nx - fix GCM for zero length messages
  crypto: nx - fix XCBC for zero length messages
  crypto: nx - fix limits to sg lists for AES-CCM
  crypto: nx - fix limits to sg lists for AES-XCBC
  crypto: nx - fix limits to sg lists for AES-GCM
  crypto: nx - fix limits to sg lists for AES-CTR
  crypto: nx - fix limits to sg lists for AES-CBC
  crypto: nx - fix limits to sg lists for AES-ECB
  crypto: nx - add offset to nx_build_sg_lists()
  padata - Register hotcpu notifier after initialization
  padata - share code between CPU_ONLINE and CPU_DOWN_FAILED, same to CPU_DOWN_PREPARE and CPU_UP_CANCELED
  hwrng: omap - reorder OMAP TRNG driver code
  crypto: omap-sham - correct dma burst size
  crypto: omap-sham - Enable Polling mode if DMA fails
  crypto: tegra-aes - bitwise vs logical and
  crypto: sahara - checking the wrong variable
  ...
2013-09-07 14:31:18 -07:00
Linus Torvalds
0ffb01d9de Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 "A quick set of fixes, some to deal with fallout from yesterday's
  net-next merge.

   1) Fix compilation of bnx2x driver with CONFIG_BNX2X_SRIOV disabled,
      from Dmitry Kravkov.

   2) Fix a bnx2x regression caused by one of Dave Jones's mistaken
      braces changes, from Eilon Greenstein.

   3) Add some protective filtering in the netlink tap code, from Daniel
      Borkmann.

   4) Fix TCP congestion window growth regression after timeouts, from
      Yuchung Cheng.

   5) Correctly adjust TCP's rcv_ssthresh for out of order packets, from
      Eric Dumazet"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  tcp: properly increase rcv_ssthresh for ofo packets
  net: add documentation for BQL helpers
  mlx5: remove unused MLX5_DEBUG param in Kconfig
  bnx2x: Restore a call to config_init
  bnx2x: fix broken compilation with CONFIG_BNX2X_SRIOV is not set
  tcp: fix no cwnd growth after timeout
  net: netlink: filter particular protocols from analyzers
2013-09-07 14:27:46 -07:00
David Herrmann
c7dc65737c Input: evdev - add EVIOCREVOKE ioctl
If we have multiple sessions on a system, we normally don't want
background sessions to read input events. Otherwise, it could capture
passwords and more entered by the user on the foreground session. This is
a real world problem as the recent XMir development showed:
  http://mjg59.dreamwidth.org/27327.html

We currently rely on sessions to release input devices when being
deactivated. This relies on trust across sessions. But that's not given on
usual systems. We therefore need a way to control which processes have
access to input devices.

With VTs the kernel simply routed them through the active /dev/ttyX. This
is not possible with evdev devices, though. Moreover, we want to avoid
routing input-devices through some dispatcher-daemon in userspace (which
would add some latency).

This patch introduces EVIOCREVOKE. If called on an evdev fd, this revokes
device-access irrecoverably for that *single* open-file. Hence, once you
call EVIOCREVOKE on any dup()ed fd, all fds for that open-file will be
rather useless now (but still valid compared to close()!). This allows us
to pass fds directly to session-processes from a trusted source. The
source keeps a dup()ed fd and revokes access once the session-process is
no longer active.
Compared to the EVIOCMUTE proposal, we can avoid the CAP_SYS_ADMIN
restriction now as there is no way to revive the fd again. Hence, a user
is free to call EVIOCREVOKE themself to kill the fd.

Additionally, this ioctl allows multi-layer access-control (again compared
to EVIOCMUTE which was limited to one layer via CAP_SYS_ADMIN). A middle
layer can simply request a new open-file from the layer above and pass it
to the layer below. Now each layer can call EVIOCREVOKE on the fds to
revoke access for all layers below, at the expense of one fd per layer.

There's already ongoing experimental user-space work which demonstrates
how it can be used:
  http://lists.freedesktop.org/archives/systemd-devel/2013-August/012897.html

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-09-07 12:53:20 -07:00
Linus Torvalds
27c7651a6a This is the bulk of GPIO changes for the v3.12 series:
- A new driver for the TZ1090 PDC which is used on the metag
   architecture.
 
 - A new driver for the Kontron ETX or COMexpress GPIO block.
   This is found on some ETX x86 devices.
 
 - A new driver for the Fintek Super-I/O chips, used on
   some x86 boards.
 
 - Added device tree probing on a few select GPIO blocks.
 
 - Drop the Exynos support from the Samsung GPIO driver.
   The Samsung maintainers have moved over to use the
   modernized pin control driver to provide GPIO for the
   modern platforms instead.
 
 - The usual bunch of non-critical fixes and cleanups.
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Merge tag 'gpio-v3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.12 series:

   - A new driver for the TZ1090 PDC which is used on the metag
     architecture.

   - A new driver for the Kontron ETX or COMexpress GPIO block.  This is
     found on some ETX x86 devices.

   - A new driver for the Fintek Super-I/O chips, used on some x86
     boards.

   - Added device tree probing on a few select GPIO blocks.

   - Drop the Exynos support from the Samsung GPIO driver.

     The Samsung maintainers have moved over to use the modernized pin
     control driver to provide GPIO for the modern platforms instead.

   - The usual bunch of non-critical fixes and cleanups"

* tag 'gpio-v3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (36 commits)
  gpio: return -ENOTSUPP if debounce cannot be set
  gpio: improve error path in gpiolib
  gpio: add GPIO support for F71882FG and F71889F
  of: add vendor prefix for Microchip Technology Inc
  gpio: mcp23s08: rename the device tree property
  gpio: samsung: Drop support for Exynos SoCs
  gpio: pcf857x: Remove pdata argument to pcf857x_irq_domain_init()
  gpio: pcf857x: Sort headers alphabetically
  gpio: max7301: Reverting "Do not force SPI speed when using OF Platform"
  gpio: Fix bit masking in Kontron PLD GPIO driver
  gpio: pca953x: fix gpio input on gpio offsets >= 8
  drivers/gpio: simplify use of devm_ioremap_resource
  drivers/gpio/gpio-omap.c: convert comma to semicolon
  gpio-lynxpoint: Fix warning about unbalanced pm_runtime_enable
  gpio: Fix platform driver name in Kontron PLD GPIO driver
  gpio: adnp: Fix segfault if request_threaded_irq fails
  gpio: msm: Staticize local variable 'msm_gpio'
  gpio: gpiolib-of.c: make error message more meaningful by adding the node name and index
  gpio: use dev_get_platdata()
  gpio/mxc: add chained_irq_enter/exit() to mx2_gpio_irq_handler
  ...
2013-09-07 10:53:00 -07:00
Linus Torvalds
8b8a7df9a1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
 "A new driver for slidebar on Ideapad laptops and a bunch of assorted
  driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (32 commits)
  Input: add SYN_MAX and SYN_CNT constants
  Input: max11801_ts - convert to devm
  Input: egalax-ts - fix typo and improve text
  Input: MAINTAINERS - change maintainer for cyttsp driver
  Input: cyttsp4 - kill 'defined but not used' compiler warnings
  Input: add driver for slidebar on Lenovo IdeaPad laptops
  Input: omap-keypad - set up irq type from DT
  Input: omap-keypad - enable wakeup capability for keypad.
  Input: omap-keypad - clear interrupts on open
  Input: omap-keypad - convert to threaded IRQ
  Input: omap-keypad - use bitfiled instead of hardcoded values
  Input: cyttsp4 - remove useless NULL test from cyttsp4_watchdog_timer()
  Input: wacom - fix error return code in wacom_probe()
  Input: as5011 - fix error return code in as5011_probe()
  Input: keyboard, serio - simplify use of devm_ioremap_resource
  Input: tegra-kbc - simplify use of devm_ioremap_resource
  Input: htcpen - fix incorrect placement of __initdata
  Input: qt1070 - add power management ops
  Input: wistron_btns - add MODULE_DEVICE_TABLE
  Input: wistron_btns - mark the Medion MD96500 keymap as tested
  ...
2013-09-07 10:38:46 -07:00
Linus Torvalds
b04c99e3b8 Revert "Input: introduce BTN/ABS bits for drums and guitars"
This reverts commits 61e00655e9cb, 73f8645db191 and 8e22ecb603c8:
  "Input: introduce BTN/ABS bits for drums and guitars"
  "HID: wiimote: add support for Guitar-Hero drums"
  "HID: wiimote: add support for Guitar-Hero guitars"

The extra new ABS_xx values resulted in ABS_MAX no longer being a
power-of-two, which broke the comparison logic.  It also caused the
ioctl numbers to overflow into the next byte, causing problems for that.

We'll try again for 3.13.

Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-07 09:48:41 -07:00