diff options
| -rw-r--r-- | drivers/md/md.c | 15 | ||||
| -rw-r--r-- | drivers/md/md.h | 3 |
2 files changed, 15 insertions, 3 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 590aee057aca..73758b754127 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2452,7 +2452,8 @@ static void export_rdev(struct md_rdev *rdev, struct mddev *mddev) if (test_bit(AutoDetected, &rdev->flags)) md_autodetect_dev(rdev->bdev->bd_dev); #endif - blkdev_put(rdev->bdev, mddev->external ? &claim_rdev : rdev); + blkdev_put(rdev->bdev, + test_bit(Holder, &rdev->flags) ? rdev : &claim_rdev); rdev->bdev = NULL; kobject_put(&rdev->kobj); } @@ -3632,6 +3633,7 @@ EXPORT_SYMBOL_GPL(md_rdev_init); static struct md_rdev *md_import_device(dev_t newdev, int super_format, int super_minor) { struct md_rdev *rdev; + struct md_rdev *holder; sector_t size; int err; @@ -3646,8 +3648,15 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe if (err) goto out_clear_rdev; + if (super_format == -2) { + holder = &claim_rdev; + } else { + holder = rdev; + set_bit(Holder, &rdev->flags); + } + rdev->bdev = blkdev_get_by_dev(newdev, BLK_OPEN_READ | BLK_OPEN_WRITE, - super_format == -2 ? &claim_rdev : rdev, NULL); + holder, NULL); if (IS_ERR(rdev->bdev)) { pr_warn("md: could not open device unknown-block(%u,%u).\n", MAJOR(newdev), MINOR(newdev)); @@ -3684,7 +3693,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe return rdev; out_blkdev_put: - blkdev_put(rdev->bdev, super_format == -2 ? &claim_rdev : rdev); + blkdev_put(rdev->bdev, holder); out_clear_rdev: md_rdev_clear(rdev); out_free_rdev: diff --git a/drivers/md/md.h b/drivers/md/md.h index 9bcb77bca963..7c9c13abd7ca 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -211,6 +211,9 @@ enum flag_bits { * check if there is collision between raid1 * serial bios. */ + Holder, /* rdev is used as holder while opening + * underlying disk exclusively. + */ }; static inline int is_badblock(struct md_rdev *rdev, sector_t s, int sectors, |