On 2015-04-07 19:57, 인정식 wrote: > Thank you for the information. > I just found that btrfs-progs includes several files that seem modified from btrfs kernel source. > I am not sure exactly what they are. > Web pages say libbtrfs is to provide interface for apps that use btrfs. > Why should there be duplicated codes between kernel and user space? > Is it an on-going effort to port whole btrfs to user space? > > Could you lead me to some more information about libbtrfs or how to port btrfs to user space? > > Thank you, > Jeongsik > > As far as I understand it, the intent is to allow things like btrfs check and btrfs restore to still work even if the kernel doesn't have btrfs support. From what I can tell, you are the first person to actually be serious about getting BTRFS running in userspace, so there probably isn't much BTRFS specific literature out there. I would, however suggest looking at the FUSE drivers for ext4 and ZFS, as those are both ported from kernel space, and should give some good examples of where to start.
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