On 29/07/2019 21:11, NeilBrown wrote:
> [...]
>> - else {
>> +
>> + if ((mddev->pers->level == 0) &&
>
> Don't test if ->level is 0. Instead, test if ->is_missing_dev is not
> NULL.
>
> NeilBrown
Hi Neil, thanks for the feedback. I'll change that in a potential V2,
(if the patches are likely to be accepted), good idea.
Cheers,
Guilherme
>
>
>> + ((st == clean) || (st == broken))) {
>> + if (mddev->pers->is_missing_dev(mddev))
>> + st = broken;
>> + else
>> + st = clean;
>> + }
>> + } else {
>> if (list_empty(&mddev->disks) &&
>> mddev->raid_disks == 0 &&
>> mddev->dev_sectors == 0)
>> @@ -4315,6 +4329,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
>> break;
>> case write_pending:
>> case active_idle:
>> + case broken:
>> /* these cannot be set */
>> break;
>> }
>> diff --git a/drivers/md/md.h b/drivers/md/md.h
>> index 41552e615c4c..e7b42b75701a 100644
>> --- a/drivers/md/md.h
>> +++ b/drivers/md/md.h
>> @@ -590,6 +590,8 @@ struct md_personality
>> int (*congested)(struct mddev *mddev, int bits);
>> /* Changes the consistency policy of an active array. */
>> int (*change_consistency_policy)(struct mddev *mddev, const char *buf);
>> + /* Check if there is any missing/failed members - RAID0 only for now. */
>> + bool (*is_missing_dev)(struct mddev *mddev);
>> };
>>
>> struct md_sysfs_entry {
>> diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
>> index 58a9cc5193bf..79618a6ae31a 100644
>> --- a/drivers/md/raid0.c
>> +++ b/drivers/md/raid0.c
>> @@ -455,6 +455,31 @@ static inline int is_io_in_chunk_boundary(struct mddev *mddev,
>> }
>> }
>>
>> +bool raid0_is_missing_dev(struct mddev *mddev)
>> +{
>> + struct md_rdev *rdev;
>> + static int already_missing;
>> + int def_disks, work_disks = 0;
>> + struct r0conf *conf = mddev->private;
>> +
>> + def_disks = conf->strip_zone[0].nb_dev;
>> + rdev_for_each(rdev, mddev)
>> + if (rdev->bdev->bd_disk->flags & GENHD_FL_UP)
>> + work_disks++;
>> +
>> + if (unlikely(def_disks - work_disks)) {
>> + if (!already_missing) {
>> + already_missing = 1;
>> + pr_warn("md: %s: raid0 array has %d missing/failed members\n",
>> + mdname(mddev), (def_disks - work_disks));
>> + }
>> + return true;
>> + }
>> +
>> + already_missing = 0;
>> + return false;
>> +}
>> +
>> static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
>> {
>> struct r0conf *conf = mddev->private;
>> @@ -789,6 +814,7 @@ static struct md_personality raid0_personality=
>> .takeover = raid0_takeover,
>> .quiesce = raid0_quiesce,
>> .congested = raid0_congested,
>> + .is_missing_dev = raid0_is_missing_dev,
>> };
>>
>> static int __init raid0_init (void)
>> --
>> 2.22.0
--
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