diff options
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 9f0ff7187136..58f140bef999 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -72,6 +72,7 @@ static struct workqueue_struct *md_misc_wq; static int remove_and_add_spares(struct mddev *mddev, struct md_rdev *this); +static void mddev_detach(struct mddev *mddev); /* * Default number of read corrections we'll attempt on an rdev @@ -3372,6 +3373,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len) /* Looks like we have a winner */ mddev_suspend(mddev); + mddev_detach(mddev); mddev->pers->stop(mddev); if (mddev->pers->sync_request == NULL && @@ -4928,18 +4930,17 @@ int md_run(struct mddev *mddev) (unsigned long long)mddev->array_sectors / 2, (unsigned long long)mddev->pers->size(mddev, 0, 0) / 2); err = -EINVAL; - mddev->pers->stop(mddev); } if (err == 0 && mddev->pers->sync_request && (mddev->bitmap_info.file || mddev->bitmap_info.offset)) { err = bitmap_create(mddev); - if (err) { + if (err) printk(KERN_ERR "%s: failed to create bitmap (%d)\n", mdname(mddev), err); - mddev->pers->stop(mddev); - } } if (err) { + mddev_detach(mddev); + mddev->pers->stop(mddev); module_put(mddev->pers->owner); mddev->pers = NULL; bitmap_destroy(mddev); @@ -5112,9 +5113,30 @@ void md_stop_writes(struct mddev *mddev) } EXPORT_SYMBOL_GPL(md_stop_writes); +static void mddev_detach(struct mddev *mddev) +{ + struct bitmap *bitmap = mddev->bitmap; + /* wait for behind writes to complete */ + if (bitmap && atomic_read(&bitmap->behind_writes) > 0) { + printk(KERN_INFO "md:%s: behind writes in progress - waiting to stop.\n", + mdname(mddev)); + /* need to kick something here to make sure I/O goes? */ + wait_event(bitmap->behind_wait, + atomic_read(&bitmap->behind_writes) == 0); + } + if (mddev->pers->quiesce) { + mddev->pers->quiesce(mddev, 1); + mddev->pers->quiesce(mddev, 0); + } + md_unregister_thread(&mddev->thread); + if (mddev->queue) + blk_sync_queue(mddev->queue); /* the unplug fn references 'conf'*/ +} + static void __md_stop(struct mddev *mddev) { mddev->ready = 0; + mddev_detach(mddev); mddev->pers->stop(mddev); if (mddev->pers->sync_request && mddev->to_remove == NULL) mddev->to_remove = &md_redundancy_group; |