- 09 Nov, 2005 40 commits
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John W. Linville authored
The siimage driver proports to support the Adaptec SA-1210 SATA controller. However, at least some of those cards boot-up with their interrupts disabled internally. The siimage driver currently ignores that fact, so that driver does not actually work with those cards. This patch enables those interrupts on cards that need it. [ This is implemented based on similar code in the libata-based sata_sil driver. ] Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Alan Cox authored
Matthew Wilcox asked that this got a comment explaining why it is done so here it is. Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Jaya Kumar authored
Signed-off-by:
Jaya Kumar <jayakumar.ide@gmail.com> Signed-off-by:
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Jordan Crouse authored
From: "Jordan Crouse" <jordan.crouse@amd.com> The core IDE engine on the CS5536 is the same as the other AMD southbridges, so unlike the CS5535, we can simply add the appropriate PCI headers to the existing amd74xx code. Signed-off-by: -
Willem Riede authored
This patch started life as a response to fedora specific ide subsystem changes that made error handling of my ATAPI tape drive fail; the specifics are in https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160868 The insertion of the statement rq->errors = err; near the end of ide_end_drive_cmd() in drivers/ide/ide-io.c means that rq->errors does not contain what it needs to in idescsi_end_request() in drivers/scsi/ide-scsi.c anymore. Recent mainline kernels now also have this change. The patch below makes ide-scsi whole. Signed-off-by:
Willem Riede <wrlk@riede.org> Signed-off-by:
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Adrian Bunk authored
This patch contains the following possible cleanups: - pci/cy82c693.c: make a needlessly global function static - remove the following unneeded EXPORT_SYMBOL's: - ide-taskfile.c: do_rw_taskfile - ide-iops.c: default_hwif_iops - ide-iops.c: default_hwif_transport - ide-iops.c: wait_for_ready Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Bjorn Helgaas authored
CONFIG_IDE_MAX_HWIFS is a generic thing, no need to have it duplicated by every arch that uses it. Signed-off-by:
Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by:
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Hannes Reinecke authored
Devices driven by ide-cs will appear under /sys/devices instead of the appropriate PCMCIA device. To fix this I had to extend the hw_regs_t structure with a 'struct device' field, which allows us to set the parent link for the appropriate hwif. Signed-off-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
Jens Axboe <axboe@suse.com> Signed-off-by:
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Linus Torvalds authored
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Linus Torvalds authored
Before we did CLONE_THREAD, the way to check whether we were attaching to ourselves was to just check "current == task", but with CLONE_THREAD we should check that the thread group ID matches instead. Signed-off-by:Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Adrian Bunk authored
This patch makes a needlessly global function static. Signed-off-by:
William Irwin <wli@holomorphy.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Adrian Bunk authored
This patch makes the following previously global and EXPORT_SYMBOL'ed code static: - struct mpt_proc_root_dir - int mpt_stm_index Signed-off-by:
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Adrian Bunk authored
This patch makes two needlessly global functions static. Signed-off-by:
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Adrian Bunk authored
This patch makes the needlessly global function path_lookup_create() static. Signed-off-by:
Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by:
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NeilBrown authored
Document in Documentation/md.txt the files that now appear in sysfs, and make a couple of small refinements to exactly when 'level' and 'raid_disks' are empty, to make it match the documentation. Signed-off-by:
Neil Brown <neilb@suse.de> Acked-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
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NeilBrown authored
The current sync_action for an array can be one of idle - nothing happening resync - reduncancy being recalcualted recover - missing device being recoverred to spare check - user initiated check of redundancy repair - like resync but user-initiated and ignores bitmap optimisation. Each of these strings can also be written to the 'sync_action' file to cause that action to happen (if appropriate). While 'sync' is not technically correct, as a recovery is *not* a 'sync', I think it is the most servicable word here. Also 'action' is a strong word than 'mode'. Signed-off-by: -
NeilBrown authored
There are a few loose ends following the conversion of md to use kthreads: - Some fields in mdk_thread_t that aren't needed (kthreads does it's own completion and manages it's own name). - thread->run is now never NULL, so no need to check - Some tests for signal_pending that aren't needed (As we don't use signals to stop threads any more) - Some flush_signals are not needed - Some waits are interruptible and don't need to be. Signed-off-by:
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NeilBrown authored
The 'auto-readonly' flag (which suppresses resync and superblock updates until the first write) is not meaningful for personalities that don't support resync or superblock writes (raid0, linear, etc). So clear the setting early to avoid it confusing anything - e.g. appearing in /proc/mdstat Signed-off-by:
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NeilBrown authored
The introduction of 'resync=PENDING' (for read-only devices) caused that message to appear for non-syncable arrays like raid0 and linear. Simplest thing is to not try to print any resync info unless the personality clearly supports it. Signed-off-by:
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NeilBrown authored
Some, but not all, md array support data redundancy and hence support checking and restoring that redundancy (resync, rebuild). Some attributes apply specifically to functions involving this redundancy, and so should only appear for md arrays for which they are meaningful. i.e. they should not appear for raid0, linear, multpath, faulty. This patch separates these into a distinct group and creates the group only if the personality supports sync_request. Signed-off-by:
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NeilBrown authored
1/ I really should be using the __ATTR macros for defining attributes, so that the .owner field get set properly, otherwise modules can be removed while sysfs files are open. This also involves some name changes of _show routines. 2/ Always lock the mddev (against reconfiguration) for all sysfs attribute access. This easily avoid certain races and is completely consistant with other interfaces (ioctl and /proc/mdstat both always lock against reconfiguration). 3/ raid5 attributes must check that the 'conf' structure actually exists (the array could have been stopped while an attribute file was open). 4/ A missing 'kfree' from when the raid5_conf_t was converted to have a kobject embedded, and then converted back again. Signed-off-by:
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NeilBrown authored
A sync of raid5 usually ignore blocks which the bitmap says are in-sync. But a user-request check or repair should not ignore these. Signed-off-by:
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NeilBrown authored
Raid1 currently optimises resync using the intent bitmap etc. This optimisation is not wanted when we explicitly request a repair through sysfs, so add appropriate checks. Signed-off-by:
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NeilBrown authored
If a block_device is a partition, then it's kobject is bdev->bd_part->kobj otherwise (if it is a full device), the kobject is bdev->bd_disk->kobj As md wants back-links to the correct object (whether partition or not), we need to respect this difference... (Thus current code shows a link to the whole device, whether we are using a partition or not, which is wrong). Signed-off-by:
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NeilBrown authored
When an md array is started, the superblock will be written, and resync may commense. This is not good if you want to be completely read-only as, for example, when preparing to resume from a suspend-to-disk image. So introduce a module parameter "start_ro" which can be set to '1' at boot, at module load, or via /sys/module/md_mod/parameters/start_ro When this is set, new arrays get an 'auto-ro' mode, which disables all internal io (superblock updates, resync, recovery) and is automatically switched to 'rw' when the first write request arrives. The array can be set to true 'ro' mode using 'mdadm -r' before the first write request, or resync can be started without a write using 'mdadm -w'. Signed-off-by:
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NeilBrown authored
With version-0.90 superblock, component devices on an md device to not have any stable name related to the array -(version-1 assigns a fixed index when a device is added to an array, and this remains despit any hot-swap). The intial code for making these devices appear in sysfs used dynamic names, which would change whenever a hot-spare was swapped for a failed or missing device. This turns out not to be practical in sysfs for a number of reasons. This patch changes then naming of component devices to be based on the result of 'bdevname'. This is stable and should be unique. Signed-off-by:
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NeilBrown authored
We can only accept BARRIER requests if all slaves handle barriers, and that can, of course, change with time.... So we keep track of whether the whole array seems safe for barriers, and also whether each individual rdev handles barriers. We initially assumes barriers are OK. When writing the superblock we try a barrier, and if that fails, we flag things for no-barriers. This will usually clear the flags fairly quickly. If writing the superblock finds that BIO_RW_BARRIER is -ENOTSUPP, we need to resubmit, so introduce function "md_super_wait" which waits for requests to finish, and retries ENOTSUPP requests without the barrier flag. When writing the real raid1, write requests which were BIO_RW_BARRIER but which aresn't supported need to be retried. So raid1d is enhanced to do this, and when any bio write completes (i.e. no retry needed) we remove it from the r1bio, so that devices needing retry are easy to find. We should hardly ever get -ENOTSUPP errors when writing data to the raid. It should only happen if: 1/ the device used to support BARRIER, but now doesn't. Few devices change like this, though raid1 can! or 2/ the array has no persistent superblock, so there was no opportunity to pre-test for barriers when writing the superblock. Signed-off-by:Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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NeilBrown authored
Current bitmaps use set_bit et.al and so are host-endian, which means not-portable. Oops. Define a new version number (4) for which bitmaps are little-endian. Signed-off-by:
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NeilBrown authored
This has the advantage of removing the confusion caused by 'rdev_t' and 'mddev_t' both having 'in_sync' fields. Signed-off-by:
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NeilBrown authored
Two refinements to the 'attempt-overwrite-on-read-error' mechanism. 1/ If the array is read-only, don't attempt an over-write. 2/ If there are more than max_nr_stripes read errors on a device with no success, fail the drive. This will make sure a dead drive will be eventually kicked even when we aren't trying to rewrite (which would normally kick a dead drive more quickly. Signed-off-by:
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NeilBrown authored
There isn't really a need for raid5 attributes to be an a subdirectory, so this patch moves them from /sys/block/mdX/md/raid5/attribute to /sys/block/mdX/md/attribute This suggests that all md personalities should co-operate about namespace usage, but that shouldn't be a problem. Signed-off-by:
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NeilBrown authored
1/ Use reduce stack usage, because 'gcc' apparently doesn't overlay different variables that are in separate scopes... 2/ Use test_bit instead of ( .. & 1<< ..) which in this case is buggy. Thanks to Andrew Morton Signed-off-by:
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NeilBrown authored
Thanks Greg. Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Suzanne Wood authored
Acked-by: <paulmck@us.ibm.com> Signed-off-by:
Suzanne Wood <suzannew@cs.pdx.edu> Signed-off-by:
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NeilBrown authored
With this, raid5 can be asked to check parity without repairing it. It also keeps a count of the number of incorrect parity blocks found (mismatches) and reports them through sysfs. Signed-off-by:
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NeilBrown authored
You can trigger a 'check' with echo check > /sys/block/mdX/md/scan_mode or a check-and-repair errors with echo repair > /sys/block/mdX/md/scan_mode and read the current state from the same file. Note: personalities need to know the different between 'check' and 'repair', but don't yet. Until they do, 'check' will be the same as 'repair' and will just do a normal resync pass. Signed-off-by:
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