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| author | NeilBrown <neilb@suse.de> | 2006-01-06 00:20:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:34:09 -0800 |
| commit | 014236d2b8ec6faea2a6134ab8e019d84d67b524 (patch) | |
| tree | 80f655fe0631f56544b96f2b9750f93e327b23de /drivers | |
| parent | 2bf071bf50580380a8c3afe5eef8152a66be96c7 (diff) | |
| download | linux-3.10-014236d2b8ec6faea2a6134ab8e019d84d67b524.tar.gz linux-3.10-014236d2b8ec6faea2a6134ab8e019d84d67b524.tar.bz2 linux-3.10-014236d2b8ec6faea2a6134ab8e019d84d67b524.zip | |
[PATCH] md: expose device slot information via sysfs
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/md.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 27a9871f305..a8169564209 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -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 |