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Reload superblock if METADATA_UPDATED is received

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Re-reads the devices by invalidating the cache.
Since we don't write to faulty devices, this is detected using
events recorded in the devices. If it is old as compared to the mddev
mark it is faulty.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
This commit is contained in:
Goldwyn Rodrigues
2014-06-07 01:53:00 -05:00
parent 293467aa1f
commit 1d7e3e9611
3 changed files with 24 additions and 0 deletions
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22
drivers/md/md.c
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@@ -8788,6 +8788,28 @@ err_wq:
return ret;
}
void md_reload_sb(struct mddev *mddev)
{
struct md_rdev *rdev, *tmp;
rdev_for_each_safe(rdev, tmp, mddev) {
rdev->sb_loaded = 0;
ClearPageUptodate(rdev->sb_page);
}
mddev->raid_disks = 0;
analyze_sbs(mddev);
rdev_for_each_safe(rdev, tmp, mddev) {
struct mdp_superblock_1 *sb = page_address(rdev->sb_page);
/* since we don't write to faulty devices, we figure out if the
* disk is faulty by comparing events
*/
if (mddev->events > sb->events)
set_bit(Faulty, &rdev->flags);
}
}
EXPORT_SYMBOL(md_reload_sb);
#ifndef MODULE
/*