On 8/25/25 3:32 AM, Yu Kuai wrote:
> static loff_t lo_calculate_size(struct loop_device *lo, struct file *file)
> {
> - struct kstat stat;
> loff_t loopsize;
> int ret;
>
> - /*
> - * Get the accurate file size. This provides better results than
> - * cached inode data, particularly for network filesystems where
> - * metadata may be stale.
> - */
> - ret = vfs_getattr_nosec(&file->f_path, &stat, STATX_SIZE, 0);
> - if (ret)
> - return 0;
> + if (S_ISBLK(file_inode(file)->i_mode)) {
> + loopsize = i_size_read(file->f_mapping->host);
> + } else {
> + struct kstat stat;
> +
> + /*
> + * Get the accurate file size. This provides better results than
> + * cached inode data, particularly for network filesystems where
> + * metadata may be stale.
> + */
> + ret = vfs_getattr_nosec(&file->f_path, &stat, STATX_SIZE, 0);
> + if (ret)
> + return 0;
> +
> + loopsize = stat.size;
> + }
Gah, that was pretty silly...
--
Jens Axboe
