mirror of https://gitee.com/openkylin/linux.git
md: split md_set_readonly out of do_md_stop
Using do_md_stop to set an array to read-only is a little confusing. Now most of the common code has been factored out, split md_set_readonly off in to a separate function. Signed-off-by: NeilBrown <neilb@suse.de>
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NeilBrown
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a047e12540
commit
a4bd82d0d0
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@ -3309,6 +3309,7 @@ array_state_show(mddev_t *mddev, char *page)
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}
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static int do_md_stop(mddev_t * mddev, int ro, int is_open);
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static int md_set_readonly(mddev_t * mddev, int is_open);
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static int do_md_run(mddev_t * mddev);
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static int restart_array(mddev_t *mddev);
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@ -3339,7 +3340,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
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break; /* not supported yet */
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case readonly:
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if (mddev->pers)
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err = do_md_stop(mddev, 1, 0);
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err = md_set_readonly(mddev, 0);
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else {
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mddev->ro = 1;
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set_disk_ro(mddev->gendisk, 1);
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@ -3349,7 +3350,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
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case read_auto:
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if (mddev->pers) {
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if (mddev->ro == 0)
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err = do_md_stop(mddev, 1, 0);
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err = md_set_readonly(mddev, 0);
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else if (mddev->ro == 1)
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err = restart_array(mddev);
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if (err == 0) {
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@ -4641,9 +4642,34 @@ static void md_stop(mddev_t *mddev)
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}
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static int md_set_readonly(mddev_t *mddev, int is_open)
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{
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int err = 0;
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mutex_lock(&mddev->open_mutex);
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if (atomic_read(&mddev->openers) > is_open) {
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printk("md: %s still in use.\n",mdname(mddev));
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err = -EBUSY;
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goto out;
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}
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if (mddev->pers) {
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md_stop_writes(mddev);
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err = -ENXIO;
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if (mddev->ro==1)
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goto out;
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mddev->ro = 1;
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set_disk_ro(mddev->gendisk, 1);
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clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
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sysfs_notify_dirent(mddev->sysfs_state);
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err = 0;
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}
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out:
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mutex_unlock(&mddev->open_mutex);
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return err;
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}
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/* mode:
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* 0 - completely stop and dis-assemble array
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* 1 - switch to readonly
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* 2 - stop but do not disassemble array
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*/
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static int do_md_stop(mddev_t * mddev, int mode, int is_open)
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@ -4660,45 +4686,33 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
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md_stop_writes(mddev);
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switch(mode) {
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case 1: /* readonly */
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err = -ENXIO;
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if (mddev->ro==1)
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goto out;
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mddev->ro = 1;
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break;
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case 0: /* disassemble */
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case 2: /* stop */
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if (mddev->ro)
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set_disk_ro(disk, 0);
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if (mddev->ro)
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set_disk_ro(disk, 0);
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md_stop(mddev);
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mddev->queue->merge_bvec_fn = NULL;
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mddev->queue->unplug_fn = NULL;
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mddev->queue->backing_dev_info.congested_fn = NULL;
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md_stop(mddev);
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mddev->queue->merge_bvec_fn = NULL;
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mddev->queue->unplug_fn = NULL;
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mddev->queue->backing_dev_info.congested_fn = NULL;
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/* tell userspace to handle 'inactive' */
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sysfs_notify_dirent(mddev->sysfs_state);
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/* tell userspace to handle 'inactive' */
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sysfs_notify_dirent(mddev->sysfs_state);
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list_for_each_entry(rdev, &mddev->disks, same_set)
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if (rdev->raid_disk >= 0) {
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char nm[20];
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sprintf(nm, "rd%d", rdev->raid_disk);
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sysfs_remove_link(&mddev->kobj, nm);
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}
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list_for_each_entry(rdev, &mddev->disks, same_set)
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if (rdev->raid_disk >= 0) {
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char nm[20];
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sprintf(nm, "rd%d", rdev->raid_disk);
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sysfs_remove_link(&mddev->kobj, nm);
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}
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set_capacity(disk, 0);
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revalidate_disk(disk);
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set_capacity(disk, 0);
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revalidate_disk(disk);
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if (mddev->ro)
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mddev->ro = 0;
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}
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if (mode == 1)
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set_disk_ro(disk, 1);
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if (mddev->ro)
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mddev->ro = 0;
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clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
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err = 0;
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}
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out:
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mutex_unlock(&mddev->open_mutex);
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if (err)
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return err;
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@ -4724,9 +4738,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
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if (mddev->hold_active == UNTIL_STOP)
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mddev->hold_active = 0;
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} else if (mddev->pers)
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printk(KERN_INFO "md: %s switched to read-only mode.\n",
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mdname(mddev));
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}
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err = 0;
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blk_integrity_unregister(disk);
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md_new_event(mddev);
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@ -5724,7 +5736,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
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goto done_unlock;
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case STOP_ARRAY_RO:
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err = do_md_stop(mddev, 1, 1);
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err = md_set_readonly(mddev, 1);
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goto done_unlock;
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case BLKROSET:
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@ -7140,7 +7152,7 @@ static int md_notify_reboot(struct notifier_block *this,
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* appears to still be in use. Hence
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* the '100'.
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*/
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do_md_stop(mddev, 1, 100);
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md_set_readonly(mddev, 100);
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mddev_unlock(mddev);
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}
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/*
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