2012/2/6 Yehuda Sadeh Weinraub <[email protected]>: > On Sun, Feb 5, 2012 at 6:21 PM, huang jun <[email protected]> wrote: >> hi, all >> Recently, we use s3 client cyberduck to add some files to RADOS, it >> seems doesn't support objects named with prefix of '_'. >> eg, if we put a object named "_test"(1 prefix "_") in bucket TEST, it >> will store in RADOS in another name "___test"(3 prefix "_"). >> but if we list bucket TEST, it sends op whoes oid is "__test"(2 >> prefix "_"), result the RADOS return ENOENT err. > > That's a bug. From what I can tell, the bucket listing is broken (when > object name starts with underscore). I created bug #2025 in the ceph > tracker. > >> we trace the debug log,and found where it comes from: >> in "translate_raw_obj" func of rgw_common.h, >> if (obj.size() >= 2 && obj[1] == '_') { >> obj = obj.substr(1); >> return true; >> } >> why cut the obj name? > > The underscore serves as an escape character. Some object are created > in a separate namespace, and the format for those objects is: > > _<namespace>_<obj name> > > These objects reside in the bucket, but may not be listable, and may > not be accounted in the bucket stats. > >> what is "string ns" in struct rgw_obj doing here? Can't we just use >> the origin obj name that passed object_name verfication? > > 'ns' is the namespace. I'm not sure what check you're pointing at, but > we do need to handle the case where an object has a namespace > different than the default one. > I mean here is "validate_object_name" when init the rgw_handler. i think we should do nothing if the "ns" string is empty. i have done a test, it works well except that when we download a file "_test' (size is 20B) the yberduck returns error "unexpected end of ZLIB input stream". > Thanks, > Yehuda
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