The patch titled
md: Allow rdev state to be set via sysfs
has been added to the -mm tree. Its filename is
md-allow-rdev-state-to-be-set-via-sysfs.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: Allow rdev state to be set via sysfs
From: NeilBrown <neilb@xxxxxxx>
The md/dev-XXX/state file can now be written:
"faulty" simulates an error on the device
"remove" removes the device from the array (if it is not busy)
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
Documentation/md.txt | 3 +++
drivers/md/md.c | 26 +++++++++++++++++++++++++-
2 files changed, 28 insertions(+), 1 deletion(-)
diff -puN Documentation/md.txt~md-allow-rdev-state-to-be-set-via-sysfs Documentation/md.txt
--- devel/Documentation/md.txt~md-allow-rdev-state-to-be-set-via-sysfs 2006-05-31 22:28:20.000000000 -0700
+++ devel-akpm/Documentation/md.txt 2006-05-31 22:28:20.000000000 -0700
@@ -302,6 +302,9 @@ Each directory contains:
This includes spares that are in the process
of being recoverred to
This list make grow in future.
+ This can be written to.
+ Writing "faulty" simulates a failure on the device.
+ Writing "remove" removes the device from the array.
errors
An approximate count of read errors that have been detected on
diff -puN drivers/md/md.c~md-allow-rdev-state-to-be-set-via-sysfs drivers/md/md.c
--- devel/drivers/md/md.c~md-allow-rdev-state-to-be-set-via-sysfs 2006-05-31 22:28:20.000000000 -0700
+++ devel-akpm/drivers/md/md.c 2006-05-31 22:28:20.000000000 -0700
@@ -1745,8 +1745,32 @@ state_show(mdk_rdev_t *rdev, char *page)
return len+sprintf(page+len, "\n");
}
+static ssize_t
+state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
+{
+ /* can write
+ * faulty - simulates and error
+ * remove - disconnects the device
+ */
+ int err = -EINVAL;
+ if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
+ md_error(rdev->mddev, rdev);
+ err = 0;
+ } else if (cmd_match(buf, "remove")) {
+ if (rdev->raid_disk >= 0)
+ err = -EBUSY;
+ else {
+ mddev_t *mddev = rdev->mddev;
+ kick_rdev_from_array(rdev);
+ md_update_sb(mddev);
+ md_new_event(mddev);
+ err = 0;
+ }
+ }
+ return err ? err : len;
+}
static struct rdev_sysfs_entry
-rdev_state = __ATTR_RO(state);
+rdev_state = __ATTR(state, 0644, state_show, state_store);
static ssize_t
super_show(mdk_rdev_t *rdev, char *page)
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
fix-dcache-race-during-umount.patch
prune_one_dentry-tweaks.patch
remove-softlockup-from-invalidate_mapping_pages.patch
prepare-for-__copy_from_user_inatomic-to-not-zero-missed-bytes.patch
make-copy_from_user_inatomic-not-zero-the-tail-on-i386.patch
kconfig-select-things-at-the-closest-tristate-instead-of-bool.patch
dm-mirror-sector-offset-fix.patch
md-reformat-code-in-raid1_end_write_request-to-avoid-goto.patch
md-remove-arbitrary-limit-on-chunk-size.patch
md-remove-useless-ioctl-warning.patch
md-increase-the-delay-before-marking-metadata-clean-and-make-it-configurable.patch
md-merge-raid5-and-raid6-code.patch
md-remove-nuisance-message-at-shutdown.patch
md-allow-checkpoint-of-recovery-with-version-1-superblock.patch
md-allow-checkpoint-of-recovery-with-version-1-superblock-fix.patch
md-allow-a-linear-array-to-have-drives-added-while-active.patch
md-support-stripe-offset-mode-in-raid10.patch
md-make-md_print_devices-static.patch
md-split-reshape-portion-of-raid5-sync_request-into-a-separate-function.patch
md-bitmap-fix-online-removal-of-file-backed-bitmaps.patch
md-bitmap-remove-bitmap-writeback-daemon.patch
md-bitmap-cleaner-separation-of-page-attribute-handlers-in-md-bitmap.patch
md-bitmap-use-set_bit-etc-for-bitmap-page-attributes.patch
md-bitmap-remove-unnecessary-page-reference-manipulations-from-md-bitmap-code.patch
md-bitmap-remove-dead-code-from-md-bitmap.patch
md-bitmap-tidy-up-i_writecount-handling-in-md-bitmap.patch
md-bitmap-change-md-bitmap-file-handling-to-use-bmap-to-file-blocks.patch
md-change-md-bitmap-file-handling-to-use-bmap-to-file-blocks-fix.patch
md-calculate-correct-array-size-for-raid10-in-new-offset-mode.patch
md-md-kconfig-speeling-feex.patch
md-fix-kconfig-error.patch
md-fix-bug-that-stops-raid5-resync-from-happening.patch
md-allow-re-add-to-work-on-array-without-bitmaps.patch
md-dont-write-dirty-clean-update-to-spares-leave-them-alone.patch
md-set-get-state-of-array-via-sysfs.patch
md-allow-rdev-state-to-be-set-via-sysfs.patch
md-allow-raid-layout-to-be-read-and-set-via-sysfs.patch
md-allow-resync_start-to-be-set-and-queried-via-sysfs.patch
md-allow-the-write_mostly-flag-to-be-set-via-sysfs.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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