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raid5-cache: start raid5 readonly if journal is missing 

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;