On 2013-11-09 21:18, Chris Murphy wrote: > > On Nov 9, 2013, at 11:10 AM, Goffredo Baroncelli <kreij...@inwind.it> > wrote: >> >> 1 ID 256 gen 5 top level 5 path sub1 2 ID 257 gen 6 top level 5 >> path dir/sub2 3 ID 258 gen 8 top level 5 path dir/sub3 4 ID 259 >> gen >> 8 top level 5 path dir/sub3/sub4 5 ID 260 gen 10 top level 5 path >> sub5 6 ID 261 gen 10 top level 5 path sub5/sub6 > >> >> >> I expected that in the line 4, the top level should be 258; the >> same for the line 6: top level should be 260. So my question is: >> what is the meaning of the "top level" value ? > > If you mount -o subvol=sub5 and then create a new subvolume, and then > do a listing, you'll see something like what you describe. It would > look something like: > > 6 ID 262 gen 4 top level 260 path sub6 > > The "top level" is in a sense a prefix. So top level 5 means there is > no prefix, the path listed is the full path. Whereas if the top level > is e.g. 260, the implied prefix is sub5/.
Chris, many thanks, not it is clear. > > If you were to mount subvolid=259 and create a subvolume in at the > root of the mountpoint, then do a subvolume listing, it would be > listed with top level 259 and a path of merely "newname" rather than > dir/sub3/sub4/newname. > > So just consider the top level a prefix for the listed path, and if > the top level is 5, there is no prefix for path, the path is the full > path. > > > Chris Murphy-- To unsubscribe from this list: send the line > "unsubscribe linux-btrfs" in the body of a message to > majord...@vger.kernel.org More majordomo info at > http://vger.kernel.org/majordomo-info.html > -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
