So locally on xfs this works, but Samba when receiving the request remotely apparently isn't doing the fallocate. Would be curious if this works with vfs_btrfs and btrfs filesystem on the share - or a Samba server bug. On Sun, Aug 2, 2020 at 9:55 PM Xiaoli Feng <xifeng@xxxxxxxxxx> wrote: > > Hello all, > > Recently when I'm investigating the xfstests generic/213 generic/228 failures for cifs. > Found that fallocate can't change the cifs disk space usage. Comparing xfs fileystem, > fallocate can update space usage. > > My tests is in 5.8.0-rc7+. I also file a bug for this issue. > https://bugzilla.kernel.org/show_bug.cgi?id=208775 > > # cat /etc/samba/smb.conf > [cifs] > path=/mnt/cifs > writeable=yes > # mount //localhost/cifs cifs -o user=root,password=redhat,cache=none,actimeo=0 > # df -h cifs > Filesystem Size Used Avail Use% Mounted on > //localhost/cifs 36G 23G 13G 66% /root/cifs > # fallocate -o 0 -l 2g /root/cifs/file1 > # df -h cifs > Filesystem Size Used Avail Use% Mounted on > //localhost/cifs 36G 23G 13G 66% /root/cifs > ]# ls -l cifs > total 1 > -rwxr-xr-x. 1 root root 2147483648 Aug 2 21:57 file1 > > Thanks. > > -- > Best regards! > XiaoLi Feng 冯小丽 > -- Thanks, Steve
