Daniel Smedegaard Buus:
> Do you have any idea why aufs won't mount with autofs? I have a direct
> map using tmpfs which works:
>
> /Archive -fstype=3Dtmpfs,size=3D20M none
>
> Doing an ls on /Archive instantly mounts it. However,
>
> /Archive -fstype=3Daufs,ro,xino=3D/run/xino,br=3D/titanic/Downloads/Pro=
> cessed=3Dro:/titanic/Volumes/XD001=3Dro
> none
>
> does not. It just,
>
> # ll /Archive/
> ls: cannot access /Archive/: No such file or directory
I've tried it with these.
- both of aufs3.14 and aufs3.x-rcN (for 3.19)
- /etc/auto.master
/tmp/auto /etc/auto.tmp
- /etc/auto.tmp
rw -fstype=tmpfs,size=1M none
ro -fstype=tmpfs,size=1M none
u -fstype=aufs,br=/tmp/auto/rw:/tmp/auto/ro none
In both kernel versions, simple ls(1) made /tmp/auto/u mounted
expectedly. But I had to access rw and ro before accessing u.
$ ls /tmp/auto/rw
$ ls /tmp/auto/ro
$ ls /tmp/auto/u
--> succeeded
When I tried "ls /tmp/auto/u" without acessing rw and ro, it failed.
$ ls /tmp/auto/u
aufs opt_add:790:mount[3390]: lookup failed /tmp/auto/rw (-2)
ls: cannot access /tmp/auto/u: No such file or directory
Here is my guess.
- the branch pathnames are passed to mount(2), and they are passed to
aufs as it is.
- in kernel-space aufs look-up those pathnames.
--> the msg "lookup failed /tmp/auto/rw" was produced here.
--> which means the look-up from kernel-space doesn't affect
automount.
- no userspace tools (as /sbin/mount.aufs) access them.
And here is my suggestion.
- rename /sbin/mount.aufs to /sbin/mount.aufs.orig
- write a simple script to run ls for all given paths in "br=", and then
invoke /sbin/mount.aufs.orig.
- name the script /sbin/mount.aufs.
J. R. Okajima
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