use_ino option not shown as mount option

[henfri]

General description

When mounting with the option use_ino, neither the output of the command "mount" nor "cat /proc/mounts" shows that this mount option is actually used.
Example command:
mergerfs -o defaults,allow_other,use_ino /root/mergerfstest/test1:/root/mergerfstest/test2 /mnt/test

Expected behavior

mount
1:2 on /mnt/test type fuse.mergerfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,**use_ino**)

Actual behavior

1:2 on /mnt/test type fuse.mergerfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other)

Precise steps to reproduce the behavior

run
mergerfs -o defaults,allow_other,use_ino /root/mergerfstest/test1:/root/mergerfstest/test2 /mnt/test
mount
cat /proc/mounts |grep /mnt/test

System information

Please provide as much of the following information as possible:

• mergerfs version: mergerfs -V
  mergerfs version: 2.23.1
  FUSE library version: 2.9.7
  fusermount version: 2.9.7
  using FUSE kernel interface version 7.19

• mergerfs settings: cat /etc/fstab or the command line arguments
  see above

• Linux version: uname -a
  Linux homeserver 4.13.0-0.bpo.1-amd64 overflow risk in ioctl.cpp #1 SMP Debian 4.13.13-1~bpo9+1 (2017-11-22) x86_64 GNU/Linux

Thanks for your work on mergerfs! I appreciate it.

[henfri]

Hello,

can I do anything to further nail down this problem?
Or any other suggestions?

Greetings,
Hendrik

[trapexit]

It's probably a FUSE issue. I just need to get the cycles to investigate and send a report upstream.

[henfri]

Hello,

thanks for your reply.
Cycles?
Anything I can do to support?

How can I find out, if the mount option is just not displayed, or whether it is not used by mergerfs?
I'd like to know, if this is the reason for my problem here:
borgbackup/borg#3492

Is there a workaround for the time being?

Greetings,
Hendrik

[trapexit]

What's the relation between the option in the mount options and your borg issues? Is something querying the options in order to decided how to act?

[henfri]

No, Not at all. I Just need to confirm that use_ino is active to make Sure that this ist Not the cause for my Borg issue.

[trapexit]

If you put it in the arguments it's used. If the value was invalid it'd error. Just look at the inode of a file. If it's some large really number then it's working.

The feature works if that's ultimately what you're asking. It just isn't showing up in the options for some reason. It's not the only one as I remember. Just a display issues.

[henfri]

Ok, thanks.
I also found the problem with borg (see that issue).

[trapexit]

Can't be fixed. Not passed to the kernel.