Ananda Tallur:
> I had to backport it to old version of aufs sources provided in Ubuntu
> karmic: 20090126.
Hmm... That is about one year old version. Roughly speaking, I had
released the newer version 40 or 50 times since then.
> I would like to use the latest aufs source in the git standalone
> repository and I will try to do it soon. For this I will have to
:::
That is the most likely way, I believe.
> Please find attached the backported patch I have applied to aufs source
> version 20090126. There were also two small typo fixes:
Ah, sorry.
Now I refined the patch and applied the similar approach to the internal
copy-up (several places), handling chmod/chown or any other attribute
changes, link(2) and rename(2).
The patch grew up and it will be included in next Monday release. While
I don't attach the latest patch to this mail, I'd suggest you to upgrade
aufs on next Monday.
Here is a list which I've found about hfsplus.
These things never mean that hfsplus is bad. It just differs from other
popular linux filesystems. Additionally you are using it as RO. They
won't be problem on your system generally.
- hfsplus does not set limit to the link count in link(2). Potentially
or theoritically it can be a problem when the link count overflows (I
don't think it can happen easily though).
- it doesn't seem to be available to be remounted RO --> RW.
- it doesn't seem to handle the block count of a file which has a hole
in it (sparse file) and a symlink. Or its blockc count looks uncommon.
- it doesn't support splice(2) for write, and doesn't update atime for
splice read (or stat/fstat cannot get the updated atime).
- it may return a positive number as the link count of an unlinked file,
and its size became 0 (incorrect).
- sgid bit of the parent dir of a newly created file doesn't seem to be
inherited (sysv:bsd behaviour).
- finally, I gave up supporting writable hfsplus branch in aufs.
J. R. Okajima
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