diff options
| author | Song Liu <songliubraving@fb.com> | 2015-10-08 21:54:13 -0700 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-11-01 13:48:29 +1100 |
| commit | 339421def582abb14c2217aa8c8f28bb2e299174 (patch) | |
| tree | ffb4662582ae9357408d90d83a2e816923b055a3 /drivers/md | |
| parent | f2076e7d0643d15b11db979acc7cffd2e8d69e77 (diff) | |
| download | linux-339421def582abb14c2217aa8c8f28bb2e299174.tar.gz | |
MD: when RAID journal is missing/faulty, block RESTART_ARRAY_RW
When RAID-4/5/6 array suffers from missing journal device, we put the array in read only state. We should not allow trasition to read-write states (clean and active) before replacing journal device. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index b5057596b630..08a4034351de 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3970,7 +3970,9 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len) break; case clean: if (mddev->pers) { - restart_array(mddev); + err = restart_array(mddev); + if (err) + break; spin_lock(&mddev->lock); if (atomic_read(&mddev->writes_pending) == 0) { if (mddev->in_sync == 0) { @@ -3988,7 +3990,9 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len) break; case active: if (mddev->pers) { - restart_array(mddev); + err = restart_array(mddev); + if (err) + break; clear_bit(MD_CHANGE_PENDING, &mddev->flags); wake_up(&mddev->sb_wait); err = 0; @@ -5351,6 +5355,25 @@ static int restart_array(struct mddev *mddev) return -EINVAL; if (!mddev->ro) return -EBUSY; + if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { + struct md_rdev *rdev; + bool has_journal = false; + + rcu_read_lock(); + rdev_for_each_rcu(rdev, mddev) { + if (test_bit(Journal, &rdev->flags) && + !test_bit(Faulty, &rdev->flags)) { + has_journal = true; + break; + } + } + rcu_read_unlock(); + + /* Don't restart rw with journal missing/faulty */ + if (!has_journal) + return -EINVAL; + } + mddev->safemode = 0; mddev->ro = 0; set_disk_ro(disk, 0); |