search for: btrfs_ioc_clone_range

...> > > Server-side copy can be requested using smbclient, using > > > the "scopy" command. > > > > > > It's a simple: > > > > > > scopy source dest > > > > Thanks but I just tested and it doesn't trigger > > BTRFS_IOC_CLONE_RANGE. The server-side copy is working all right, > > but the file is not copied through BTRFS reflink (cp > > --reflink=auto). It is quite noticeable on large file, where it > > should be nearly instantaneous. > > > > My configuration: > > - client: Debian Stable +...

...tency will be > > > heavily effected by whether the FSCTL_SRV_COPYCHUNK wire request > > > byte offsets and lengths align to the Btrfs sector-size (4K by > > > default IIRC). > > > If they do align, then each chunk in the request can be mapped to > > > a BTRFS_IOC_CLONE_RANGE ioctl. Otherwise, we need to fall back to > > > a server-side local read/write. > > > > > > We should be able to provide underlying filesystem alignment > > > requirements to SMB clients via the new > > > FileFSSectorSizeInformation ioctl, but it's...

...135.html > with Samba and Btrfs the request latency will be > heavily effected by whether the FSCTL_SRV_COPYCHUNK wire request byte > offsets and lengths align to the Btrfs sector-size (4K by default > IIRC). > If they do align, then each chunk in the request can be mapped to a > BTRFS_IOC_CLONE_RANGE ioctl. Otherwise, we need to fall back to a > server-side local read/write. > > We should be able to provide underlying filesystem alignment > requirements to SMB clients via the new FileFSSectorSizeInformation > ioctl, but it's not currently supported by Samba. So which client...

...equested using smbclient, using > > > > the "scopy" command. > > > > > > > > It's a simple: > > > > > > > > scopy source dest > > > > > > Thanks but I just tested and it doesn't trigger > > > BTRFS_IOC_CLONE_RANGE. The server-side copy is working all right, > > > but the file is not copied through BTRFS reflink (cp > > > --reflink=auto). It is quite noticeable on large file, where it > > > should be nearly instantaneous. > > > > > > My configuration: > > &g...

...mental backups). I''ve been told that the problem is somewhat difficult to solve properly under block-based representation of data, but I was hoping that btrfs'' reflink mechanism and its space-efficient packing of small files might make it doable. A hack I can think of is to do a BTRFS_IOC_CLONE_RANGE into a new file (upto the offset), writing whatever data is required, and then doing another BTRFS_IOC_CLONE_RANGE with an offset for the rest of the original file. This can be followed by a rename() over the original file. Similarly for removing data from the middle of a file. Would this work? Wou...

...; > > > the "scopy" command. > > > > > > > > > > It's a simple: > > > > > > > > > > scopy source dest > > > > > > > > Thanks but I just tested and it doesn't trigger > > > > BTRFS_IOC_CLONE_RANGE. The server-side copy is working all > > > > right, but the file is not copied through BTRFS reflink (cp > > > > --reflink=auto). It is quite noticeable on large file, where it > > > > should be nearly instantaneous. > > > > > > > > My co...

...and Btrfs the request latency will be > > heavily effected by whether the FSCTL_SRV_COPYCHUNK wire request byte > > offsets and lengths align to the Btrfs sector-size (4K by default > > IIRC). > > If they do align, then each chunk in the request can be mapped to a > > BTRFS_IOC_CLONE_RANGE ioctl. Otherwise, we need to fall back to a > > server-side local read/write. > > > > We should be able to provide underlying filesystem alignment > > requirements to SMB clients via the new FileFSSectorSizeInformation > > ioctl, but it's not currently supported b...

...rchive. Changes are determined by the transid of inodes and the generation number of file extent items. An inode/extent is considered to be changed if the transid/generation is higher then a specified generation. While testing the code I found a problem with files where parts where cloned with the BTRFS_IOC_CLONE_RANGE ioctl. When the extents get cloned, their generation is cloned too. Which means, that even if the file was actually changed, my checks may say that it is unchanged because the extents generation numbers are lower then the specified generation number. The same problem may occur when BTRFS_IOC_CLONE...

Hello, This patch series adds an initial implementation of restriper (it''s a clever name for relocation framework that allows to do selective profile changing and selective balancing with some goodies like pausing/resuming and reporting progress to the user. Profile changing is global (per-FS) so far, per-subvolume profiles require some discussion and can be implemented in future.