The patch titled
md: expose the degraded status of an assembled array through sysfs
has been added to the -mm tree. Its filename is
md-expose-the-degraded-status-of-an-assembled-array-through-sysfs.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: expose the degraded status of an assembled array through sysfs
From: Iustin Pop <iusty@xxxxxxxxx>
The 'degraded' attribute is useful to quickly determine if the array is
degraded, instead of parsing 'mdadm -D' output or relying on the other
techniques (number of working devices against number of defined devices,
etc.). The md code already keeps track of this attribute, so it's useful to
export it.
Signed-off-by: Iustin Pop <iusty@xxxxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/md.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN drivers/md/md.c~md-expose-the-degraded-status-of-an-assembled-array-through-sysfs drivers/md/md.c
--- a/drivers/md/md.c~md-expose-the-degraded-status-of-an-assembled-array-through-sysfs
+++ a/drivers/md/md.c
@@ -2833,6 +2833,12 @@ sync_max_store(mddev_t *mddev, const cha
static struct md_sysfs_entry md_sync_max =
__ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store);
+static ssize_t
+degraded_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%d\n", mddev->degraded);
+}
+static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded);
static ssize_t
sync_speed_show(mddev_t *mddev, char *page)
@@ -2976,6 +2982,7 @@ static struct attribute *md_redundancy_a
&md_suspend_lo.attr,
&md_suspend_hi.attr,
&md_bitmap.attr,
+ &md_degraded.attr,
NULL,
};
static struct attribute_group md_redundancy_group = {
_
Patches currently in -mm which might be from iusty@xxxxxxxxx are
md-expose-the-degraded-status-of-an-assembled-array-through-sysfs.patch
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