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raid5-cache: start raid5 readonly if journal is missing

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If raid array is expected to have journal (eg, journal is set in MD
superblock feature map) and the array is started without journal disk,
start the array readonly.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This commit is contained in:
Shaohua Li 2015-10-08 21:54:10 -07:00 committed by NeilBrown
parent a97b789644
commit 7dde2ad3c5
2 changed files with 9 additions and 1 deletions
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3
drivers/md/raid5-cache.c
View File

@ -806,8 +806,9 @@ void r5l_quiesce(struct r5l_log *log, int state)
bool r5l_log_disk_error(struct r5conf *conf)
{
/* don't allow write if journal disk is missing */
if (!conf->log)
return false;
return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
return test_bit(Faulty, &conf->log->rdev->flags);
}

7
drivers/md/raid5.c
View File

@ -6810,6 +6810,13 @@ static int run(struct mddev *mddev)
if (IS_ERR(conf))
return PTR_ERR(conf);
if (test_bit(MD_HAS_JOURNAL, &mddev->flags) && !journal_dev) {
printk(KERN_ERR "md/raid:%s: journal disk is missing, force array readonly\n",
mdname(mddev));
mddev->ro = 1;
set_disk_ro(mddev->gendisk, 1);
}
conf->min_offset_diff = min_offset_diff;
mddev->thread = conf->thread;
conf->thread = NULL;