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loop: Remove sector_t truncation checks 

sector_t is now always u64, so we don't need to check for truncation.

Signed-off-by: Martijn Coenen <maco@android.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Martijn Coenen 2020-05-13 15:38:36 +02:00 committed by Jens Axboe
parent 7c5014b098
commit 083a6a5078
1 changed files with 7 additions and 14 deletions
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21
drivers/block/loop.c
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@ -228,24 +228,20 @@ static void __loop_update_dio(struct loop_device *lo, bool dio)
blk_mq_unfreeze_queue(lo->lo_queue);
}
static int
static void
figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit)
{
loff_t size = get_size(offset, sizelimit, lo->lo_backing_file);
sector_t x = (sector_t)size;
struct block_device *bdev = lo->lo_device;
if (unlikely((loff_t)x != size))
return -EFBIG;
if (lo->lo_offset != offset)
lo->lo_offset = offset;
if (lo->lo_sizelimit != sizelimit)
lo->lo_sizelimit = sizelimit;
set_capacity(lo->lo_disk, x);
set_capacity(lo->lo_disk, size);
bd_set_size(bdev, (loff_t)get_capacity(bdev->bd_disk) << 9);
/* let user-space know about the new size */
kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, KOBJ_CHANGE);
return 0;
}
static inline int
@ -1003,10 +999,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
!file->f_op->write_iter)
lo_flags |= LO_FLAGS_READ_ONLY;
error = -EFBIG;
size = get_loop_size(lo, file);
if ((loff_t)(sector_t)size != size)
goto out_unlock;
error = loop_prepare_queue(lo);
if (error)
goto out_unlock;
@ -1328,10 +1322,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
lo->lo_device->bd_inode->i_mapping->nrpages);
goto out_unfreeze;
}
if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) {
err = -EFBIG;
goto out_unfreeze;
}
figure_loop_size(lo, info->lo_offset, info->lo_sizelimit);
}
memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE);
@ -1534,7 +1525,9 @@ static int loop_set_capacity(struct loop_device *lo)
if (unlikely(lo->lo_state != Lo_bound))
return -ENXIO;
return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit);
figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit);
return 0;
}
static int loop_set_dio(struct loop_device *lo, unsigned long arg)