On Wed, Jan 28, 2015 at 5:24 AM, John Spray <john.spray@xxxxxxxxxx> wrote: > We don't implement the GETFLAGS and SETFLAGS ioctls used for +i. > > Adding the ioctls is pretty easy, but then we need somewhere to put > the flags. Currently we don't store a "flags" attribute on inodes, > but maybe we could borrow the high bits of the mode attribute for this > if we wanted to implement it? > > CCing ceph-devel to see if Sage/Greg can offer any more background. As discussed in our morning standup, that shouldn't cause any issues that we can think of. My concern is whether we as the FS are responsible for doing anything more than storing and returning that immutable flag — are we supposed to block writes to anything that has it set? That could be much trickier... > John > > On Wed, Jan 28, 2015 at 1:24 AM, Eric Eastman > <eric.eastman@xxxxxxxxxxxxxx> wrote: >> Should chattr +i work with cephfs? >> >> Using ceph v0.91 and a 3.18 kernel on the CephFS client, I tried this: >> >> # mount | grep ceph >> 172.16.30.10:/ on /cephfs/test01 type ceph (name=cephfs,key=client.cephfs) >> # echo 1 > /cephfs/test01/test.1 >> # ls -l /cephfs/test01/test.1 >> -rw-r—r-- 1 root root 2 Jan 27 19:09 /cephfs/test01/test.1 >> # chattr +i /cephfs/test01/test.1 >> chattr: Inappropriate ioctl for device while reading flags on >> /cephfs/test01/test.1 >> >> I also tried it using the FUSE interface: >> >> # ceph-fuse -m 172.16.30.10 /cephfs/fuse01/ >> ceph-fuse[5326]: starting ceph client >> 2015-01-27 19:54:59.002563 7f6f8fbcb7c0 -1 init, newargv = 0x2ec2be0 >> newargc=11 >> ceph-fuse[5326]: starting fuse >> # mount | grep ceph >> ceph-fuse on /cephfs/fuse01 type fuse.ceph-fuse >> (rw,nosuid,nodev,allow_other,default_permissions) >> # echo 1 > /cephfs/fuse01/test02.dat >> # chattr +i /cephfs/fuse01/test02.dat >> chattr: Invalid argument while reading flags on /cephfs/fuse01/test02.dat >> >> Eric >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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