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ceph: quota: fix quota subdir mounts
The CephFS kernel client does not enforce quotas set in a directory that isn't visible from the mount point. For example, given the path '/dir1/dir2', if quotas are set in 'dir1' and the filesystem is mounted with mount -t ceph <server>:<port>:/dir1/ /mnt then the client won't be able to access 'dir1' inode, even if 'dir2' belongs to a quota realm that points to it. This patch fixes this issue by simply doing an MDS LOOKUPINO operation for unknown inodes. Any inode reference obtained this way will be added to a list in ceph_mds_client, and will only be released when the filesystem is umounted. Link: https://tracker.ceph.com/issues/38482 Reported-by: Hendrik Peyerl <hpeyerl@plusline.net> Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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Luis Henriques
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Ilya Dryomov
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May 7, 2019
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