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md: separate flags for superblock changes

소스 검색 
The mddev->flags are used for different purposes. There are a lot of
places we check/change the flags without masking unrelated flags, we
could check/change unrelated flags. These usage are most for superblock
write, so spearate superblock related flags. This should make the code
clearer and also fix real bugs.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Shaohua Li
2016-12-08 15:48:19 -08:00
부모 82a301cb0e
커밋 2953079c69
9개의 변경된 파일과 106개의 추가작업 그리고 101개의 파일을 삭제
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26
drivers/md/raid5.c
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@@ -961,7 +961,7 @@ again:
if (bad < 0) {
set_bit(BlockedBadBlocks, &rdev->flags);
if (!conf->mddev->external &&
conf->mddev->flags) {
conf->mddev->sb_flags) {
/* It is very unlikely, but we might
* still need to write out the
* bad block log - better give it
@@ -2547,8 +2547,8 @@ static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
set_bit(Blocked, &rdev->flags);
set_bit(Faulty, &rdev->flags);
set_mask_bits(&mddev->flags, 0,
BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
set_mask_bits(&mddev->sb_flags, 0,
BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n"
"md/raid:%s: Operation continuing on %d devices.\n",
mdname(mddev),
@@ -4761,7 +4761,7 @@ finish:
}
if (!bio_list_empty(&s.return_bi)) {
if (test_bit(MD_CHANGE_PENDING, &conf->mddev->flags)) {
if (test_bit(MD_SB_CHANGE_PENDING, &conf->mddev->sb_flags)) {
spin_lock_irq(&conf->device_lock);
bio_list_merge(&conf->return_bi, &s.return_bi);
spin_unlock_irq(&conf->device_lock);
@@ -5617,9 +5617,9 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
mddev->reshape_position = conf->reshape_progress;
mddev->curr_resync_completed = sector_nr;
conf->reshape_checkpoint = jiffies;
set_bit(MD_CHANGE_DEVS, &mddev->flags);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
wait_event(mddev->sb_wait, mddev->flags == 0 ||
wait_event(mddev->sb_wait, mddev->sb_flags == 0 ||
test_bit(MD_RECOVERY_INTR, &mddev->recovery));
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
return 0;
@@ -5715,10 +5715,10 @@ finish:
mddev->reshape_position = conf->reshape_progress;
mddev->curr_resync_completed = sector_nr;
conf->reshape_checkpoint = jiffies;
set_bit(MD_CHANGE_DEVS, &mddev->flags);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
wait_event(mddev->sb_wait,
!test_bit(MD_CHANGE_DEVS, &mddev->flags)
!test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)
|| test_bit(MD_RECOVERY_INTR, &mddev->recovery));
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
goto ret;
@@ -5993,10 +5993,10 @@ static void raid5d(struct md_thread *thread)
md_check_recovery(mddev);
if (!bio_list_empty(&conf->return_bi) &&
!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
struct bio_list tmp = BIO_EMPTY_LIST;
spin_lock_irq(&conf->device_lock);
if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
if (!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
bio_list_merge(&tmp, &conf->return_bi);
bio_list_init(&conf->return_bi);
}
@@ -6043,7 +6043,7 @@ static void raid5d(struct md_thread *thread)
break;
handled += batch_size;
if (mddev->flags & ~(1<<MD_CHANGE_PENDING)) {
if (mddev->sb_flags & ~(1 << MD_SB_CHANGE_PENDING)) {
spin_unlock_irq(&conf->device_lock);
md_check_recovery(mddev);
spin_lock_irq(&conf->device_lock);
@@ -7640,7 +7640,7 @@ static int raid5_start_reshape(struct mddev *mddev)
}
mddev->raid_disks = conf->raid_disks;
mddev->reshape_position = conf->reshape_progress;
set_bit(MD_CHANGE_DEVS, &mddev->flags);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
@@ -7906,7 +7906,7 @@ static int raid5_check_reshape(struct mddev *mddev)
conf->chunk_sectors = new_chunk ;
mddev->chunk_sectors = new_chunk;
}
set_bit(MD_CHANGE_DEVS, &mddev->flags);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
}
return check_reshape(mddev);