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DM RAID: Break-up untidy function 

DM RAID:  Break-up untidy function

Clean-up excessive indentation by moving some code in raid_resume()
into its own function.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Jonathan Brassow 2013-05-08 17:57:13 -05:00 committed by NeilBrown
parent 9092c02d94
commit f381e71b04
1 changed files with 39 additions and 33 deletions
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72
drivers/md/dm-raid.c
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@ -1572,15 +1572,51 @@ static void raid_postsuspend(struct dm_target *ti)
mddev_suspend(&rs->md);
}
static void raid_resume(struct dm_target *ti)
static void attempt_restore_of_faulty_devices(struct raid_set *rs)
{
int i;
uint64_t failed_devices, cleared_failed_devices = 0;
unsigned long flags;
struct dm_raid_superblock *sb;
struct raid_set *rs = ti->private;
struct md_rdev *r;
for (i = 0; i < rs->md.raid_disks; i++) {
r = &rs->dev[i].rdev;
if (test_bit(Faulty, &r->flags) && r->sb_page &&
sync_page_io(r, 0, r->sb_size, r->sb_page, READ, 1)) {
DMINFO("Faulty %s device #%d has readable super block."
" Attempting to revive it.",
rs->raid_type->name, i);
r->raid_disk = i;
r->saved_raid_disk = i;
flags = r->flags;
clear_bit(Faulty, &r->flags);
clear_bit(WriteErrorSeen, &r->flags);
clear_bit(In_sync, &r->flags);
if (r->mddev->pers->hot_add_disk(r->mddev, r)) {
r->raid_disk = -1;
r->saved_raid_disk = -1;
r->flags = flags;
} else {
r->recovery_offset = 0;
cleared_failed_devices |= 1 << i;
}
}
}
if (cleared_failed_devices) {
rdev_for_each(r, &rs->md) {
sb = page_address(r->sb_page);
failed_devices = le64_to_cpu(sb->failed_devices);
failed_devices &= ~cleared_failed_devices;
sb->failed_devices = cpu_to_le64(failed_devices);
}
}
}
static void raid_resume(struct dm_target *ti)
{
struct raid_set *rs = ti->private;
set_bit(MD_CHANGE_DEVS, &rs->md.flags);
if (!rs->bitmap_loaded) {
bitmap_load(&rs->md);
@ -1591,37 +1627,7 @@ static void raid_resume(struct dm_target *ti)
* Take this opportunity to check whether any failed
* devices are reachable again.
*/
for (i = 0; i < rs->md.raid_disks; i++) {
r = &rs->dev[i].rdev;
if (test_bit(Faulty, &r->flags) && r->sb_page &&
sync_page_io(r, 0, r->sb_size,
r->sb_page, READ, 1)) {
DMINFO("Faulty device #%d has readable super"
"block. Attempting to revive it.", i);
r->raid_disk = i;
r->saved_raid_disk = i;
flags = r->flags;
clear_bit(Faulty, &r->flags);
clear_bit(WriteErrorSeen, &r->flags);
clear_bit(In_sync, &r->flags);
if (r->mddev->pers->hot_add_disk(r->mddev, r)) {
r->raid_disk = -1;
r->saved_raid_disk = -1;
r->flags = flags;
} else {
r->recovery_offset = 0;
cleared_failed_devices |= 1 << i;
}
}
}
if (cleared_failed_devices) {
rdev_for_each(r, &rs->md) {
sb = page_address(r->sb_page);
failed_devices = le64_to_cpu(sb->failed_devices);
failed_devices &= ~cleared_failed_devices;
sb->failed_devices = cpu_to_le64(failed_devices);
}
}
attempt_restore_of_faulty_devices(rs);
}
clear_bit(MD_RECOVERY_FROZEN, &rs->md.recovery);