The patch titled
md: Allow raid 'layout' to be read and set via sysfs
has been added to the -mm tree. Its filename is
md-allow-raid-layout-to-be-read-and-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 raid 'layout' to be read and set via sysfs
From: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
Documentation/md.txt | 5 +++++
drivers/md/md.c | 27 +++++++++++++++++++++++++++
2 files changed, 32 insertions(+)
diff -puN Documentation/md.txt~md-allow-raid-layout-to-be-read-and-set-via-sysfs Documentation/md.txt
--- devel/Documentation/md.txt~md-allow-raid-layout-to-be-read-and-set-via-sysfs 2006-05-31 22:28:21.000000000 -0700
+++ devel-akpm/Documentation/md.txt 2006-05-31 22:28:21.000000000 -0700
@@ -200,6 +200,11 @@ All md devices contain:
This can be written only while the array is being assembled, not
after it is started.
+ layout
+ The "layout" for the array for the particular level. This is
+ simply a number that is interpretted differently by different
+ levels. It can be written while assembling an array.
+
new_dev
This file can be written but not read. The value written should
be a block device number as major:minor. e.g. 8:0
diff -puN drivers/md/md.c~md-allow-raid-layout-to-be-read-and-set-via-sysfs drivers/md/md.c
--- devel/drivers/md/md.c~md-allow-raid-layout-to-be-read-and-set-via-sysfs 2006-05-31 22:28:21.000000000 -0700
+++ devel-akpm/drivers/md/md.c 2006-05-31 22:28:21.000000000 -0700
@@ -2155,6 +2155,32 @@ level_store(mddev_t *mddev, const char *
static struct md_sysfs_entry md_level =
__ATTR(level, 0644, level_show, level_store);
+
+static ssize_t
+layout_show(mddev_t *mddev, char *page)
+{
+ /* just a number, not meaningful for all levels */
+ return sprintf(page, "%d\n", mddev->layout);
+}
+
+static ssize_t
+layout_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ char *e;
+ unsigned long n = simple_strtoul(buf, &e, 10);
+ if (mddev->pers)
+ return -EBUSY;
+
+ if (!*buf || (*e && *e != '\n'))
+ return -EINVAL;
+
+ mddev->layout = n;
+ return len;
+}
+static struct md_sysfs_entry md_layout =
+__ATTR(layout, 0655, layout_show, layout_store);
+
+
static ssize_t
raid_disks_show(mddev_t *mddev, char *page)
{
@@ -2741,6 +2767,7 @@ __ATTR(suspend_hi, S_IRUGO|S_IWUSR, susp
static struct attribute *md_default_attrs[] = {
&md_level.attr,
+ &md_layout.attr,
&md_raid_disks.attr,
&md_chunk_size.attr,
&md_size.attr,
_
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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