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authorIustin Pop <iusty@k1024.org>2007-10-17 02:30:54 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 11:43:03 -0400
commitd7f3d291a0e1330f341fdf1128b2d12fff7932ee (patch)
treec7dd6ab8ece277fe71c9626aeeda2e79dd259476 /drivers/md
parent2b12ab6d33f413aabb623197eeecaad5c216e6ae (diff)
md: expose the degraded status of an assembled array through sysfs
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@k1024.org> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 510625e3a965..c059ae6f37e5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2833,6 +2833,12 @@ sync_max_store(mddev_t *mddev, const char *buf, size_t len)
2833static struct md_sysfs_entry md_sync_max = 2833static struct md_sysfs_entry md_sync_max =
2834__ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store); 2834__ATTR(sync_speed_max, S_IRUGO|S_IWUSR, sync_max_show, sync_max_store);
2835 2835
2836static ssize_t
2837degraded_show(mddev_t *mddev, char *page)
2838{
2839 return sprintf(page, "%d\n", mddev->degraded);
2840}
2841static struct md_sysfs_entry md_degraded = __ATTR_RO(degraded);
2836 2842
2837static ssize_t 2843static ssize_t
2838sync_speed_show(mddev_t *mddev, char *page) 2844sync_speed_show(mddev_t *mddev, char *page)
@@ -2976,6 +2982,7 @@ static struct attribute *md_redundancy_attrs[] = {
2976 &md_suspend_lo.attr, 2982 &md_suspend_lo.attr,
2977 &md_suspend_hi.attr, 2983 &md_suspend_hi.attr,
2978 &md_bitmap.attr, 2984 &md_bitmap.attr,
2985 &md_degraded.attr,
2979 NULL, 2986 NULL,
2980}; 2987};
2981static struct attribute_group md_redundancy_group = { 2988static struct attribute_group md_redundancy_group = {