On Wed, Apr 20, 2022 at 07:05:37PM +0000, Ryan Taylor wrote: > > Hi Luís, > > The same cephx key is used for both mounts. It is a regular rw key which > does not have permission to set any ceph xattrs (that was done > separately with a different key). But it can read ceph xattrs and set > user xattrs. Thank you for the very detail description. I'm still scratching my head to figure out what's wrong as I can't reproduce this. Just out of curiosity: are you seeing any errors/warnings in the kernel log? (dmesg) Cheers, -- Luís > > I just did a test using the latest Fedora 35 kernel and reproduced the problem: > > [fedora@cephtest ~]$ sudo mkdir /mnt/ceph1 > [fedora@cephtest ~]$ sudo mkdir /mnt/ceph2 > [fedora@cephtest ~]$ sudo mount -t ceph 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2 /mnt/ceph1 -o name=rwkey,secret=... > [fedora@cephtest ~]$ sudo mkdir /mnt/ceph1/testsubdir > [fedora@cephtest ~]$ sudo mount -t ceph 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/testsubdir /mnt/ceph2 -o name=rwkey,secret=... > [fedora@cephtest ~]$ df | grep ceph > 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2 5242880000 291385344 4951494656 6% /mnt/ceph1 > 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/testsubdir 4287562399744 295238516736 3992323883008 7% /mnt/ceph2 > [fedora@cephtest ~]$ uname -r > 5.16.20-200.fc35.x86_64 > > Furthermore I then repeated my earlier test regarding ceph.quota.max_bytes. > The volume root already has the right quota based on the size of my Manila share in Openstack, and it matches the size reported by df (5000 GiB) > > [fedora@cephtest ~]$ getfattr -n ceph.quota.max_bytes /mnt/ceph1/ > getfattr: Removing leading '/' from absolute path names > # file: mnt/ceph1/ > ceph.quota.max_bytes="5368709120000" > > And on a separate system with admin credentials I applied a max_bytes quota to the testsubdir: > > sudo setfattr -n ceph.quota.max_bytes -v 121212 /mnt/cephfs/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/testsubdir/ > > I unmounted and remounted testsubdir exactly as before, but even with ceph.quota.max_bytes applied on the subdir it still shows the wrong size: > > [fedora@cephtest ~]$ df | grep ceph > 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2 5242880000 291385344 4951494656 6% /mnt/ceph1 > 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/testsubdir 4287544954880 295264587776 3992280367104 7% /mnt/ceph2 > > [fedora@cephtest ~]$ getfattr -n ceph.quota.max_bytes /mnt/ceph1/testsubdir/ > getfattr: Removing leading '/' from absolute path names > # file: mnt/ceph1/testsubdir/ > ceph.quota.max_bytes="121212" > > [fedora@cephtest ~]$ getfattr -n ceph.quota.max_bytes /mnt/ceph2 > getfattr: Removing leading '/' from absolute path names > # file: mnt/ceph2 > ceph.quota.max_bytes="121212" > > Thanks, > -rt > > > > > > ________________________________________ > From: Luís Henriques <lhenriques@xxxxxxx> > Sent: April 20, 2022 7:16 AM > To: Ryan Taylor > Cc: Hendrik Peyerl; Ramana Venkatesh Raja; ceph-users@xxxxxxx > Subject: Re: Re: df shows wrong size of cephfs share when a subdirectory is mounted > > Notice: This message was sent from outside the University of Victoria email system. Please be cautious with links and sensitive information. > > > On Tue, Apr 19, 2022 at 08:51:50PM +0000, Ryan Taylor wrote: > > Thanks for the pointers! It does look like https://tracker.ceph.com/issues/55090 > > and I am not surprised Dan and I are hitting the same issue... > > Just a wild guess (already asked this on the tracker): > > Is it possible that you're using different credentials/keys so that the > credentials used for mounting the subdir are not allowed to access the > volume base directory? Would it be possible to get more details on the > two mount commands being used? > > Cheers, > -- > Luís > > > > > > > I am using the latest available Almalinux 8, 4.18.0-348.20.1.el8_5.x86_64 > > > > Installing kernel-debuginfo-common-x86_64 > > I see in /usr/src/debug/kernel-4.18.0-348.2.1.el8_5/linux-4.18.0-348.2.1.el8_5.x86_64/fs/ceph/quota.c > > for example: > > > > static inline bool ceph_has_realms_with_quotas(struct inode *inode) > > { > > struct super_block *sb = inode->i_sb; > > struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); > > struct inode *root = d_inode(sb->s_root); > > > > if (atomic64_read(&mdsc->quotarealms_count) > 0) > > return true; > > /* if root is the real CephFS root, we don't have quota realms */ > > if (root && ceph_ino(root) == CEPH_INO_ROOT) > > return false; > > /* otherwise, we can't know for sure */ > > return true; > > } > > > > So this EL8.5 kernel already has at least some of the patches from https://lore.kernel.org/all/20190301175752.17808-1-lhenriques@xxxxxxxx/T/#u > > for https://tracker.ceph.com/issues/38482 > > That does not mention a specific commit, just says "Merged into 5.2-rc1." > > > > So it seems https://tracker.ceph.com/issues/55090 is either a new issue or a regression of the previous issue. > > > > Thanks, > > -rt > > > > Ryan Taylor > > Research Computing Specialist > > Research Computing Services, University Systems > > University of Victoria > > > > ________________________________________ > > From: Hendrik Peyerl <hpeyerl@xxxxxxxxxxxx> > > Sent: April 19, 2022 6:05 AM > > To: Ramana Venkatesh Raja > > Cc: Ryan Taylor; ceph-users@xxxxxxx > > Subject: Re: df shows wrong size of cephfs share when a subdirectory is mounted > > > > Notice: This message was sent from outside the University of Victoria email system. Please be cautious with links and sensitive information. > > > > > > I did hit this issue aswell: https://tracker.ceph.com/issues/38482 > > > > you will need a kernel >= 5.2 that can handle the quotas on subdirectories. > > > > > > > On 19. Apr 2022, at 14:47, Ramana Venkatesh Raja <rraja@xxxxxxxxxx> wrote: > > > > > > On Sat, Apr 16, 2022 at 10:15 PM Ramana Venkatesh Raja <rraja@xxxxxxxxxx> wrote: > > >> > > >> On Thu, Apr 14, 2022 at 8:07 PM Ryan Taylor <rptaylor@xxxxxxx> wrote: > > >>> > > >>> Hello, > > >>> > > >>> > > >>> I am using cephfs via Openstack Manila (Ussuri I think). > > >>> > > >>> The cephfs cluster is v14.2.22 and my client has kernel 4.18.0-348.20.1.el8_5.x86_64 > > >>> > > >>> > > >>> I have a Manila share > > >>> > > >>> /volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2 > > >>> > > >>> > > >>> that is 5000 GB in size. When I mount it the size is reported correctly: > > >>> > > >>> > > >>> # df -h /cephfs > > >>> Filesystem Size Used Avail Use% Mounted on > > >>> 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2 4.9T 278G 4.7T 6% /cephfs > > >>> > > >>> > > >>> However when I mount a subpath /test1 of my share, then both the size and usage are showing the size of the whole cephfs filesystem rather than my private share. > > >>> > > >>> > > >>> # df -h /cephfs > > >>> Filesystem Size Used Avail Use% Mounted on > > >>> 10.30.201.3:6789,10.30.202.3:6789,10.30.203.3:6789:/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/test1 4.0P 277T 3.7P 7% /cephfs > > >>> > > >> > > >> What are the capabilities of the ceph client user ID that you used to > > >> mount "/volumes/_nogroup/55e46a89-31ff-4878-9e2a-81b4226c3cb2/test1" ? > > >> Maybe you're hitting this limitation in > > >> https://docs.ceph.com/en/latest/cephfs/quota/#limitations , > > >> "Quotas must be configured carefully when used with path-based mount > > >> restrictions. The client needs to have access to the directory inode > > >> on which quotas are configured in order to enforce them. If the client > > >> has restricted access to a specific path (e.g., /home/user) based on > > >> the MDS capability, and a quota is configured on an ancestor directory > > >> they do not have access to (e.g., /home), the client will not enforce > > >> it. When using path-based access restrictions be sure to configure the > > >> quota on the directory the client is restricted too (e.g., /home/user) > > >> or something nested beneath it. " > > >> > > > > > > Hi Ryan, > > > > > > I think you maybe actually hitting this > > > https://tracker.ceph.com/issues/55090 . Are you facing this issue with > > > the FUSE client? > > > > > > -Ramana > > > > > >>> > > >>> I tried setting the ceph.quota.max_bytes xattr on a subdirectory but it did not help. > > >>> > > >> > > >> You can't set quota xattr if your ceph client user ID doesn't have 'p' > > >> flag in its MDS capabilities, > > >> https://docs.ceph.com/en/latest/cephfs/client-auth/#layout-and-quota-restriction-the-p-flag > > >> . > > >> > > >> -Ramana > > >> > > >>> I'm not sure if the issue is in cephfs or Manila, but what would be required to get the right size and usage stats to be reported by df when a subpath of a share is mounted? > > >>> > > >>> > > >>> Thanks! > > >>> > > >>> -rt > > >>> > > >>> > > >>> Ryan Taylor > > >>> Research Computing Specialist > > >>> Research Computing Services, University Systems > > >>> University of Victoria > > >>> _______________________________________________ > > >>> ceph-users mailing list -- ceph-users@xxxxxxx > > >>> To unsubscribe send an email to ceph-users-leave@xxxxxxx > > >>> > > > > > > _______________________________________________ > > > ceph-users mailing list -- ceph-users@xxxxxxx > > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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