diff options
Diffstat (limited to 'drivers/block/xen-blkback/blkback.c')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 19 |
1 files changed, 2 insertions, 17 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index b058de7825f..0088bf60f36 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -39,9 +39,6 @@ #include <linux/list.h> #include <linux/delay.h> #include <linux/freezer.h> -#include <linux/loop.h> -#include <linux/falloc.h> -#include <linux/fs.h> #include <xen/events.h> #include <xen/page.h> @@ -426,27 +423,15 @@ static int dispatch_discard_io(struct xen_blkif *blkif, blkif->st_ds_req++; xen_blkif_get(blkif); - if (blkif->blk_backend_type == BLKIF_BACKEND_PHY) { + if (blkif->blk_backend_type == BLKIF_BACKEND_PHY || + blkif->blk_backend_type == BLKIF_BACKEND_FILE) { unsigned long secure = (blkif->vbd.discard_secure && (req->u.discard.flag & BLKIF_DISCARD_SECURE)) ? BLKDEV_DISCARD_SECURE : 0; - /* just forward the discard request */ err = blkdev_issue_discard(bdev, req->u.discard.sector_number, req->u.discard.nr_sectors, GFP_KERNEL, secure); - } else if (blkif->blk_backend_type == BLKIF_BACKEND_FILE) { - /* punch a hole in the backing file */ - struct loop_device *lo = bdev->bd_disk->private_data; - struct file *file = lo->lo_backing_file; - - if (file->f_op->fallocate) - err = file->f_op->fallocate(file, - FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE, - req->u.discard.sector_number << 9, - req->u.discard.nr_sectors << 9); - else - err = -EOPNOTSUPP; } else err = -EOPNOTSUPP; |