On 2023/4/18 20:28, Kanchan Joshi wrote:
On Tue, Apr 18, 2023 at 11:00:12AM +0100, David Howells wrote:
Hi Christoph,
It seems that my use of i_size_read(file_inode(in)) in
filemap_splice_read()
to get the size of the file to be spliced from doesn't work in the
case of
blockdevs and it always returns 0.
What would be the best way to get the blockdev size? Look at
file->f_mapping->i_size maybe?
bdev_nr_bytes(I_BDEV(file->f_mapping->host))
should work I suppose.
This needs the caller to check if the file is a blockdev. Can we fill
the upper inode size which belongs to devtmpfs so that the generic code
do not need to aware the low level inode type?
