[resending without a text/html subpart] This is https://bugzilla.kernel.org/show_bug.cgi?id=114751 Since some time around kernel 3.16, NFSv3 mounts can return EPERM for POSIX extended ACL calls if the current user does not match the owner, instead of EOPNOTSUPP. James Brown, CC'd, has confirmed the bug is still present in mainline 4.4. Using ftrace, I've observed[0] that the call fails inside the VFS layer before even hitting the NFS code, which makes me suspect 013cdf1088d7235da9477a2375654921d9b9ba9f (“nfs: use generic posix ACL infrastructure for v3 Posix ACLs”). Unfortunately I haven't had a chance to confirm that theory by building the before/after revisions. CC'ing Christoph, who authored that series. - Nelson [0] http://nelhagedebugsshit.tumblr.com/post/116688651723/broken-posix-acls-on-nfs-on-kernel-316 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html