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md: provide appropriate return value for spare_active functions.

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md_check_recovery expects ->spare_active to return 'true' if any
spares were activated, but none of them do, so the consequent change
in 'degraded' is not notified through sysfs.

So count the number of spares activated, subtract it from 'degraded'
just once, and return it.

Reported-by: Adrian Drzewiecki <adriand@vmware.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown
2010-08-18 11:56:59 +10:00
parent e6ffbcb6cd
commit 6b96562054
3 changed files with 21 additions and 15 deletions
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12
drivers/md/raid1.c
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@ -1120,6 +1120,8 @@ static int raid1_spare_active(mddev_t *mddev)
{
int i;
conf_t *conf = mddev->private;
int count = 0;
unsigned long flags;
/*
* Find all failed disks within the RAID1 configuration
@ -1131,16 +1133,16 @@ static int raid1_spare_active(mddev_t *mddev)
if (rdev
&& !test_bit(Faulty, &rdev->flags)
&& !test_and_set_bit(In_sync, &rdev->flags)) {
unsigned long flags;
spin_lock_irqsave(&conf->device_lock, flags);
mddev->degraded--;
spin_unlock_irqrestore(&conf->device_lock, flags);
count++;
sysfs_notify_dirent(rdev->sysfs_state);
}
}
spin_lock_irqsave(&conf->device_lock, flags);
mddev->degraded -= count;
spin_unlock_irqrestore(&conf->device_lock, flags);
print_conf(conf);
return 0;
return count;
}