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md: simplify some 'if' conditionals in raid5_start_reshape. 

There are two consecutive 'if' statements.

 if (mddev->delta_disks >= 0)
      ....
 if (mddev->delta_disks > 0)

The code in the second is equally valid if delta_disks == 0, and these
two statements are the only place that 'added_devices' is used.

So make them a single if statement, make added_devices a local
variable, and re-indent it all.

No functional change.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-01-31 11:57:43 +11:00
parent de171cb9a5
commit 87a8dec91e
1 changed files with 28 additions and 27 deletions
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55
drivers/md/raid5.c
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@ -5517,7 +5517,6 @@ static int raid5_start_reshape(mddev_t *mddev)
raid5_conf_t *conf = mddev->private;
mdk_rdev_t *rdev;
int spares = 0;
int added_devices = 0;
unsigned long flags;
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
@ -5571,34 +5570,36 @@ static int raid5_start_reshape(mddev_t *mddev)
* to correctly record the "partially reconstructed" state of
* such devices during the reshape and confusion could result.
*/
if (mddev->delta_disks >= 0)
list_for_each_entry(rdev, &mddev->disks, same_set)
if (rdev->raid_disk < 0 &&
!test_bit(Faulty, &rdev->flags)) {
if (raid5_add_disk(mddev, rdev) == 0) {
char nm[20];
if (rdev->raid_disk >= conf->previous_raid_disks) {
set_bit(In_sync, &rdev->flags);
added_devices++;
if (mddev->delta_disks >= 0) {
int added_devices = 0;
list_for_each_entry(rdev, &mddev->disks, same_set)
if (rdev->raid_disk < 0 &&
!test_bit(Faulty, &rdev->flags)) {
if (raid5_add_disk(mddev, rdev) == 0) {
char nm[20];
if (rdev->raid_disk
>= conf->previous_raid_disks) {
set_bit(In_sync, &rdev->flags);
added_devices++;
} else
rdev->recovery_offset = 0;
sprintf(nm, "rd%d", rdev->raid_disk);
if (sysfs_create_link(&mddev->kobj,
&rdev->kobj, nm))
/* Failure here is OK */;
} else
rdev->recovery_offset = 0;
sprintf(nm, "rd%d", rdev->raid_disk);
if (sysfs_create_link(&mddev->kobj,
&rdev->kobj, nm))
/* Failure here is OK */;
} else
break;
} else if (rdev->raid_disk >= conf->previous_raid_disks
&& !test_bit(Faulty, &rdev->flags)) {
/* This is a spare that was manually added */
set_bit(In_sync, &rdev->flags);
added_devices++;
}
break;
} else if (rdev->raid_disk >= conf->previous_raid_disks
&& !test_bit(Faulty, &rdev->flags)) {
/* This is a spare that was manually added */
set_bit(In_sync, &rdev->flags);
added_devices++;
}
/* When a reshape changes the number of devices, ->degraded
* is measured against the larger of the pre and post number of
* devices.*/
if (mddev->delta_disks > 0) {
/* When a reshape changes the number of devices,
* ->degraded is measured against the larger of the
* pre and post number of devices.
*/
spin_lock_irqsave(&conf->device_lock, flags);
mddev->degraded += (conf->raid_disks - conf->previous_raid_disks)
- added_devices;