diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-07-22 09:53:56 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-08-02 13:37:28 -0600 |
| commit | d7a66574b34e0b354442140927f9b787efccabfd (patch) | |
| tree | 36de0c3d2edd2acd41e718d36283d645b6e97166 | |
| parent | a45e43cad798173b41e0d6f119784826d3ead02c (diff) | |
block: unhash the whole device inode earlier
Unhash the whole device inode early in del_gendisk. This allows to
remove the first GENHD_FL_UP check in the open path as we simply
won't find a just removed inode. The second non-racy check after
taking open_mutex is still kept.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210722075402.983367-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/genhd.c | 7 | ||||
| -rw-r--r-- | fs/block_dev.c | 2 |
2 files changed, 2 insertions, 7 deletions
diff --git a/block/genhd.c b/block/genhd.c index 298ee78c1bda..716f5ca479ad 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -585,6 +585,7 @@ void del_gendisk(struct gendisk *disk) disk_del_events(disk); mutex_lock(&disk->open_mutex); + remove_inode_hash(disk->part0->bd_inode); disk->flags &= ~GENHD_FL_UP; blk_drop_partitions(disk); mutex_unlock(&disk->open_mutex); @@ -592,12 +593,6 @@ void del_gendisk(struct gendisk *disk) fsync_bdev(disk->part0); __invalidate_device(disk->part0, true); - /* - * Unhash the bdev inode for this device so that it can't be looked - * up any more even if openers still hold references to it. - */ - remove_inode_hash(disk->part0->bd_inode); - set_capacity(disk, 0); if (!(disk->flags & GENHD_FL_HIDDEN)) { diff --git a/fs/block_dev.c b/fs/block_dev.c index 9ef4f1fc2cb0..932f4034ad66 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1340,7 +1340,7 @@ struct block_device *blkdev_get_no_open(dev_t dev) disk = bdev->bd_disk; if (!kobject_get_unless_zero(&disk_to_dev(disk)->kobj)) goto bdput; - if ((disk->flags & (GENHD_FL_UP | GENHD_FL_HIDDEN)) != GENHD_FL_UP) + if (disk->flags & GENHD_FL_HIDDEN) goto put_disk; if (!try_module_get(bdev->bd_disk->fops->owner)) goto put_disk; |