- 18 May, 2010 22 commits
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NeilBrown authored
This moves the call to the other side of set_readonly, but that should not be an issue. This encapsulates in 'md_stop' all of the functionality for internally stopping the array, leaving all the interactions with externalities (sysfs, request_queue, gendisk) in do_md_stop. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
Using do_md_stop to set an array to read-only is a little confusing. Now most of the common code has been factored out, split md_set_readonly off in to a separate function. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
Further refactoring of do_md_stop. This one requires some explanation as it takes code from different places in do_md_stop, so some re-ordering happens. We only get into this part of do_md_stop if there are no active opens of the device, so no writes can be happening and the device must have been flushed. In md_stop_writes we want to stop any internal sources of writes - i.e. resync - and flush out the metadata. The only code that was previously before some of this code is code to clean up the queue, the mddev, the gendisk, or sysfs, all of which is probably better after code that makes active changes (i.e. triggers writes). Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
do_md_stop is large and clunky, so hard to understand. This is a first step of refactoring, pulling two simple sub-functions out. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
As part of relaxing the binding between an mddev and gendisk, we separate do_md_run into two functions. md_run does all the work internal to md do_md_run calls md_run and makes and changes to gendisk that are required. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
We set ->changed to 1 and call check_disk_change at the end of md_open so that bd_invalidated would be set and thus partition rescan would happen appropriately. Now that we call revalidate_disk directly, which sets bd_invalidates, that indirection is no longer needed and can be removed. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
Using ->array_sectors rather than get_capacity() is more direct and is a step towards relaxing the tight connection between mddev and gendisk. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
While I generally prefer letting personalities do as much as possible, given that we have a central md_make_request anyway we may as well use it to simplify code. Also this centralises knowledge of ->gendisk which will help later. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
Diving through ->queue to find mddev is unnecessarily complex - there is an easier path to finding mddev, so use that. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
This is unlikely to be wanted, but we may as well provide it for completeness. Signed-off-by: NeilBrown <neilb@suse.de>
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Maciej Trela authored
Level changes can be very significant, so make sure to notify them via sysfs. Signed-off-by: Maciej Trela <maciej.trela@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
When metadata is being managed by user-space, md doesn't know what the maximum number of devices allowed in an array is so ->max_disks is 0. In this case we should allow any (+ve) number of disks. Signed-off-by: NeilBrown <neilb@suse.de>
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Maciej Trela authored
Writing "none" to "../md/dev-xx/slot" removes that device from being an active part of the array, but it didn't set ->raid_disk to -1 to record this fact. Signed-off-by: Maciej Trela <Maciej.Trela@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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Trela, Maciej authored
Signed-off-by: Maciej Trela <maciej.trela@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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Trela, Maciej authored
Signed-off-by: Maciej Trela <maciej.trela@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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Trela Maciej authored
Signed-off-by: Maciej Trela <maciej.trela@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
In a subsequent patch we will make it possible to change mddev->raid_disks while a RAID0 or RAID10 array is active. This is part of the process of reshaping such an array. This means that we cannot use this value while processes requests (it is OK to use it during initialisation as we are locked against changes then). Both RAID0 and RAID10 have the same value stored in the private data structure, so use that value instead. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
This was needed when sysfs files could only be 'notified' from process context. Now that we have sys_notify_direct, we can call it directly from an interrupt. Signed-off-by: NeilBrown <neilb@suse.de>
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H Hartley Sweeten authored
void pointers do not need to be cast to other pointer types. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: NeilBrown <neilb@suse.de>
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Paul Clements authored
Keep track of the maximum number of concurrent write-behind requests for an md array and exposed this number in sysfs at md/bitmap/max_backlog_used Writing any value to this file will clear it. This allows userspace to be involved in tuning bitmap/backlog. Signed-off-by: Paul Clements <paul.clements@steeleye.com> Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
These fields have never been used. commit 4b6d287f added them, but also added identical files to bitmap_super_s, and only used the latter. So remove these unused fields. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
There is a very small race window when writing to a RAID1 such that if a device is marked faulty at exactly the wrong time, the write-in-progress will not be sent to the device, but the bitmap (if present) will be updated to say that the write was sent. Then if the device turned out to still be usable as was re-added to the array, the bitmap-based-resync would skip resyncing that block, possibly leading to corruption. This would only be a problem if no further writes were issued to that area of the device (i.e. that bitmap chunk). Suitable for any pending -stable kernel. Cc: stable@kernel.org Signed-off-by: NeilBrown <neilb@suse.de>
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- 17 May, 2010 3 commits
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NeilBrown authored
Some levels expect the 'redundancy group' to be present, others don't. So when we change level of an array we might need to add or remove this group. This requires fixing up the current practice of overloading ->private to indicate (when ->pers == NULL) that something needs to be removed. So create a new ->to_remove to fill that role. When changing levels, we may need to add or remove attributes. When changing RAID5 -> RAID6, we both add and remove the same thing. It is important to catch this and optimise it out as the removal is delayed until a lock is released, so trying to add immediately would cause problems. Cc: stable@kernel.org Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
When an array is stopped we need to remove some sysfs files which are dependent on the type of array. We need to delay that deletion as deleting them while holding reconfig_mutex can lead to deadlocks. We currently delay them until the array is completely destroyed. However it is possible to deactivate and then reactivate the array. It is also possible to need to remove sysfs files when changing level, which can potentially happen several times before an array is destroyed. So we need to delete these files more promptly: as soon as reconfig_mutex is dropped. We need to ensure this happens before do_md_run can restart the array, so we use open_mutex for some extra locking. This is not deadlock prone. Cc: stable@kernel.org Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown authored
Since commit ef286f6f it has been important that each personality clears ->private in the ->stop() function, or sets it to a attribute group to be removed. linear.c doesn't. This can sometimes lead to an oops, though it doesn't always. Suitable for 2.6.33-stable and 2.6.34. Signed-off-by: NeilBrown <neilb@suse.de> Cc: stable@kernel.org
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- 11 May, 2010 1 commit
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Dan Williams authored
When the user sets the block device to readwrite then the mddev should follow suit. Otherwise, the BUG_ON in md_write_start() will be set to trigger. The reverse direction, setting mddev->ro to match a set readonly request, can be ignored because the blkdev level readonly flag precludes the need to have mddev->ro set correctly. Nevermind the fact that setting mddev->ro to 1 may fail if the array is in use. Cc: <stable@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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- 16 Mar, 2010 1 commit
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NeilBrown authored
If a component device has a merge_bvec_fn then as we never call it we must ensure we never need to. Currently this is done by setting max_sector to 1 PAGE, however this does not stop a bio being created with several sub-page iovecs that would violate the merge_bvec_fn. So instead set max_segments to 1 and set the segment boundary to the same as a page boundary to ensure there is only ever one single-page segment of IO requested at a time. This can particularly be an issue when 'xen' is used as it is known to submit multiple small buffers in a single bio. Signed-off-by: NeilBrown <neilb@suse.de> Cc: stable@kernel.org
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- 08 Mar, 2010 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-consoleLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-console: virtio: console: Use better variable names for fill_queue operation virtio: console: Fix type of 'len' as unsigned int
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- 07 Mar, 2010 12 commits
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Linus Torvalds authored
Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits) x86, mrst: Fix whitespace breakage in apb_timer.c x86, mrst: Fix APB timer per cpu clockevent x86, mrst: Remove X86_MRST dependency on PCI_IOAPIC x86, olpc: Use pci subarch init for OLPC x86, pci: Add arch_init to x86_init abstraction x86, mrst: Add Kconfig dependencies for Moorestown x86, pci: Exclude Moorestown PCI code if CONFIG_X86_MRST=n x86, numaq: Make CONFIG_X86_NUMAQ depend on CONFIG_PCI x86, pci: Add sanity check for PCI fixed bar probing x86, legacy_irq: Remove duplicate vector assigment x86, legacy_irq: Remove left over nr_legacy_irqs x86, mrst: Platform clock setup code x86, apbt: Moorestown APB system timer driver x86, mrst: Add vrtc platform data setup code x86, mrst: Add platform timer info parsing code x86, mrst: Fill in PCI functions in x86_init layer x86, mrst: Add dummy legacy pic to platform setup x86/PCI: Moorestown PCI support x86, ioapic: Add dummy ioapic functions x86, ioapic: Early enable ioapic for timer irq ... Fixed up semantic conflict of new clocksources due to commit 17622339 ("clocksource: add argument to resume callback").
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git://git.fluff.org/bjdooks/linuxLinus Torvalds authored
* 'for-linus/i2c' of git://git.fluff.org/bjdooks/linux: i2c: Add support for Xilinx XPS IIC Bus Interface i2c: omap: Add support for 16-bit registers i2c-pnx: fix setting start/stop condition powerpc: doc/dts-bindings: update doc of FSL I2C bindings i2c-mpc: add support for the MPC512x processors from Freescale i2c-mpc: rename "setclock" initialization functions to "setup" i2c-mpc: use __devinit[data] for initialization functions and data i2c/imx: don't add probe function to the driver struct i2c: Add support for Ux500/Nomadik I2C controller
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6Linus Torvalds authored
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (66 commits) mfd: Fix ucb1x00 build failure for collie_defconfig mfd: Fix lpc_sch related depends/selects, fix build error gpio: Fix sch_gpio warning gpio: add Intel SCH GPIO controller driver i2c: convert i2c-isch to platform_device mfd: Use completion interrupt for WM831x AUXADC mfd: Use completion interrupt for WM835x AUXADC mfd: Introduce remove_script function for twl4030 mfd/mmc: SDHI Kconfig update mfd: sh_mobile_sdhi MMC_CAP_MMC_HIGHSPEED support gpiolib: Force wm831x GPIOs into GPIO mode when requested mfd: Add WM831x revision B support gpiolib: Correct debugfs display of WM831x GPIO inversion gpiolib: Actually set output state in wm831x_gpio_direction_output() tmio_mmc: Balance cell enable()/disable() calls tmio_mmc: Remove const from platform data V3 tmio_mmc: Use 100ms mmc_detect_change() delay tmio_mmc: Add MMC_CAP_MMC_HIGHSPEED support V2 tmio_mmc: Keep card-detect interrupts enabled mfd: Add twl6030 base addr for ID0, ID1, ID2 ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (368 commits) Staging: winbond: fix up wireless api errors Staging: dream: camera: sk5k3e2fx: fix code style issues Staging: dream: camera: msm_camera: fix code style issues Staging: wlan-ng: More checkpatch.pl error cleanups Staging: wlan-ng - checkpatch.pl fixups Staging: comedi: comedi_fops.c: Checkpatch cleanup Staging: comedi: fix suspect code indent in ni_labpc.c Staging: comedi: fix yet another brace coding style issue in ni_labpc.c Staging: comedi: fix another brace coding style issues in ni_labpc.c Staging: comedi: fix brace coding style issue in ni_labpc.c Staging: comedi: poc: Adding some KERN_ facility level Staging: dream: camera: msm_camera: fix some code style issues Staging: wlan-ng: fix most of the style issues in hfa384x.h Staging: dream: camera: msm_camera: fix coding style issues Staging: comedi: fix bracing coding style and 80 character issues in ni_660x.c Staging: comedi: fix bracing coding style issue in ni_65xx.c Staging: comedi: pcmad: Checkpatch cleanups Staging: comedi: poc: fix coding style issues staging: dt3155: revert u_long to u64 usage Staging: comedi: drivers.c: Checkpatch cleanup ...
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Randy Dunlap authored
Fix kernel-doc notation in new seq-file functions and correct spelling. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (26 commits) sh: Convert sh to use read/update_persistent_clock sh: Move PMB debugfs entry initialization to later stage sh: Fix up flush_cache_vmap() on SMP. sh: fix up MMU reset with variable PMB mapping sizes. sh: establish PMB mappings for NUMA nodes. sh: check for existing mappings for bolted PMB entries. sh: fixed virt/phys mapping helpers for PMB. sh: make pmb iomapping configurable. sh: reworked dynamic PMB mapping. sh: Fix up cpumask_of_pcibus() for the NUMA build. serial: sh-sci: Tidy up build warnings. sh: Fix up ctrl_read/write stragglers in migor setup. serial: sh-sci: Add DMA support. dmaengine: shdma: extend .device_terminate_all() to record partial transfer sh: merge sh7722 and sh7724 DMA register definitions sh: activate runtime PM for dmaengine on sh7722 and sh7724 dmaengine: shdma: add runtime PM support. dmaengine: shdma: separate DMA headers. dmaengine: shdma: convert to platform device resources dmaengine: shdma: fix DMA error handling. ...
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git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6: parisc: use __ratelimit in unaligned.c parisc: Convert to read/update_persistent_clock parisc: Simplify param.h by including <asm-generic/param.h> parisc: drop unnecessary cast in __ldcw_align() macro parisc: add strict copy size checks (v2) parisc: remove trailing space in messages parisc: ditto sys_accept4 parisc: wire up sys_recvmmsg
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: PM: Provide generic subsystem-level callbacks PM / Runtime: Document power.runtime_auto and related functions
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio: set pci bus master enable bit
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Ben Dooks authored
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Ben Dooks authored
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Ben Dooks authored
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