The patch titled
md: Allow raid 'layout' to be read and set via sysfs
has been removed from the -mm tree. Its filename is
md-allow-raid-layout-to-be-read-and-set-via-sysfs.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
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
--- a/Documentation/md.txt~md-allow-raid-layout-to-be-read-and-set-via-sysfs
+++ a/Documentation/md.txt
@@ -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
--- a/drivers/md/md.c~md-allow-raid-layout-to-be-read-and-set-via-sysfs
+++ a/drivers/md/md.c
@@ -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
generic_file_buffered_write-deadlock-on-vectored-write.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
lockdep-annotate-sunrpc-code.patch
-
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