When remove gendisk, set the size of inode of block_device to zero.
This is mainly let the vfs know disk removed.
Signed-off-by: Jianpeng Ma <[email protected]>
---
block/genhd.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/block/genhd.c b/block/genhd.c
index dadf42b..c3a54b4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -634,6 +634,7 @@ void del_gendisk(struct gendisk *disk)
{
struct disk_part_iter piter;
struct hd_struct *part;
+ struct block_device *bdev;
disk_del_events(disk);
@@ -655,6 +656,19 @@ void del_gendisk(struct gendisk *disk)
blk_unregister_queue(disk);
blk_unregister_region(disk_devt(disk), disk->minors);
+ /*
+ * When used buffer-mode on raw blockdevice,the disk removed.
+ * But the vfs don't know.So tell the vfs size of disk became zero,
+ * the buffer write can return
+ */
+ bdev = bdget_disk(disk, 0);
+ if (bdev) {
+ mutex_lock(&bdev->bd_inode->i_mutex);
+ i_size_write(bdev->bd_inode, 0);
+ mutex_unlock(&bdev->bd_inode->i_mutex);
+ bdput(bdev);
+ }
+
part_stat_set_all(&disk->part0, 0);
disk->part0.stamp = 0;
--
1.8.4-rc0
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