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[PATCH] md: expose device slot information via sysfs

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This the role that a device has in an array can be viewed and set.

Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown
2006-01-06 00:20:55 -08:00
committed by Linus Torvalds
parent 2bf071bf50
commit 014236d2b8
2 changed files with 43 additions and 0 deletions
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35
drivers/md/md.c
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@@ -1630,10 +1630,45 @@ errors_store(mdk_rdev_t *rdev, const char *buf, size_t len)
static struct rdev_sysfs_entry rdev_errors =
__ATTR(errors, 0644, errors_show, errors_store);
static ssize_t
slot_show(mdk_rdev_t *rdev, char *page)
{
if (rdev->raid_disk < 0)
return sprintf(page, "none\n");
else
return sprintf(page, "%d\n", rdev->raid_disk);
}
static ssize_t
slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
{
char *e;
int slot = simple_strtoul(buf, &e, 10);
if (strncmp(buf, "none", 4)==0)
slot = -1;
else if (e==buf || (*e && *e!= '\n'))
return -EINVAL;
if (rdev->mddev->pers)
/* Cannot set slot in active array (yet) */
return -EBUSY;
if (slot >= rdev->mddev->raid_disks)
return -ENOSPC;
rdev->raid_disk = slot;
/* assume it is working */
rdev->flags = 0;
set_bit(In_sync, &rdev->flags);
return len;
}
static struct rdev_sysfs_entry rdev_slot =
__ATTR(slot, 0644, slot_show, slot_store);
static struct attribute *rdev_default_attrs[] = {
&rdev_state.attr,
&rdev_super.attr,
&rdev_errors.attr,
&rdev_slot.attr,
NULL,
};
static ssize_t