UID/GID-mapping with cephfs

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Hi all,

We are trying to use UID/GID-mapping with cephfs over ceph-fuse client, but we have not succeeded.

The "module=idmap" option seems not to be supported by ceph-fuse:
ceph-fuse ... /mnt/cephfs -o modules=idmap -o umap=user.map

 fuse: unknown option `modules=idmap'
 ceph-fuse[..]: fuse failed to start

(same with options like "idmap=user" and "uid=1000") only bindfs over ceph-fuse makes the idmap working: ceph-fuse ... /mnt/cephfs
	ceph-fuse[..]: starting fuse

bindfs -o modules=idmap -o umap=user.map /mnt/cephfs /mnt/mapped but it could be slow (especially in high load scenarios).

Have anybody some idea, how use idmap with ceph-fuse in a better way?

Thank you
Michal

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