On Tue, Apr 15, 2014 at 6:28 PM, Mark Fasheh <mfasheh@xxxxxxx> wrote: > On Tue, Apr 15, 2014 at 05:40:18PM +0100, Filipe David Borba Manana wrote: >> This increases the send stream version from version 1 to version 2, adding >> 2 new commands: >> >> 1) total data size - used to tell the receiver how much file data the stream >> will add or update; >> >> 2) fallocate - used to pre-allocate space for files and to punch holes in files. >> >> This is preparation work for subsequent changes that implement the new features >> (computing total data size and use fallocate for better performance). > > Are these changes compatible with software using the old stream version? We > have snapshotting tools that are using send/recieve and it would be bad to > change the ABI in incompatible ways underneath them. > --Mark New versions of btrfs-progs (send stream v2 support) will still be able to read and process v1 streams. Older btrfs-progs (v1 only) won't be able to process the new commands. Does this answers your question Mark? > > -- > Mark Fasheh -- Filipe David Manana, "Reasonable men adapt themselves to the world. Unreasonable men adapt the world to themselves. That's why all progress depends on unreasonable men." -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
