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ceph: quota: don't allow cross-quota renames

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This patch changes ceph_rename so that -EXDEV is returned if an attempt is
made to mv a file between two different dir trees with different quotas
setup.

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Luis Henriques
2018-01-05 10:47:20 +00:00
committed by Ilya Dryomov
parent b7a2921765
commit cafe21a4fb
3 changed files with 75 additions and 0 deletions
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5
fs/ceph/dir.c
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@@ -1080,6 +1080,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
else
return -EROFS;
}
/* don't allow cross-quota renames */
if ((old_dir != new_dir) &&
(!ceph_quota_is_same_realm(old_dir, new_dir)))
return -EXDEV;
dout("rename dir %p dentry %p to dir %p dentry %p\n",
old_dir, old_dentry, new_dir, new_dentry);
req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);