• Ilya Dryomov's avatar
    libceph: variable-sized ceph_object_id · d30291b9
    Ilya Dryomov authored
    Currently ceph_object_id can hold object names of up to 100
    (CEPH_MAX_OID_NAME_LEN) characters.  This is enough for all use cases,
    expect one - long rbd image names:
    
    - a format 1 header is named "<imgname>.rbd"
    - an object that points to a format 2 header is named "rbd_id.<imgname>"
    
    We operate on these potentially long-named objects during rbd map, and,
    for format 1 images, during header refresh.  (A format 2 header name is
    a small system-generated string.)
    
    Lift this 100 character limit by making ceph_object_id be able to point
    to an externally-allocated string.  Apart from being able to work with
    almost arbitrarily-long named objects, this allows us to reduce the
    size of ceph_object_id from >100 bytes to 64 bytes.
    Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
    d30291b9
debugfs.c 7.71 KB