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| author | Luis Henriques <lhenriques@suse.com> | 2019-03-21 10:20:10 +0000 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-05-07 19:22:36 +0200 |
| commit | 0c44a8e0fc55f56a70f72e67d7cc5b9341dae7d1 (patch) | |
| tree | 22ff1d529ddff80eb05f19809f37ceda342b900c /fs/ceph/mds_client.c | |
| parent | 3886274adf34a4e38417772e3d1c0b213380004e (diff) | |
| download | linux-0c44a8e0fc55f56a70f72e67d7cc5b9341dae7d1.tar.bz2 | |
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>
Diffstat (limited to 'fs/ceph/mds_client.c')
| -rw-r--r-- | fs/ceph/mds_client.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 9049c2a3e972..5dee98b4cfde 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -4125,6 +4125,8 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) mdsc->max_sessions = 0; mdsc->stopping = 0; atomic64_set(&mdsc->quotarealms_count, 0); + mdsc->quotarealms_inodes = RB_ROOT; + mutex_init(&mdsc->quotarealms_inodes_mutex); mdsc->last_snap_seq = 0; init_rwsem(&mdsc->snap_rwsem); mdsc->snap_realms = RB_ROOT; @@ -4216,6 +4218,8 @@ void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) * their inode/dcache refs */ ceph_msgr_flush(); + + ceph_cleanup_quotarealms_inodes(mdsc); } /* |