Hi,all
I got problem in using overlayfs over fs not support
dirent::ftype[such as xfs(-n ftype=0)]. After some dig I realized in
such situation, function ovl_fill_merge parameter d_type will always
be DT_UNKNOWN.
I think a warning is needed of course. But because dirent::d_type is
not widely supported for now. I thought If we can find a way to
fallback to stat() call in such a situation. How do you think this
idea?
And, can you suggest a method to do it? I tried these method for now,
but none work.
1) Direct get struct inode* from inode::i_ino, Stuck at not found
a proper abstract function to do it.
2) Get to known fs do not support dirent::d_type and workaround.
Stuck at not found how to know if fs do not support dirent::d_type
3) In function ctx.actor [ovl_fill_merge], use function
lookup_one_len to get file dirent. Stuck at lock.
Any thought is helpful. Thank you !
lilinzhe
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