search for: btrfs_ioc_clon

It''s been nearly a year since the patches needed to implement a reflinked copy between subvolumes have been posted (http://permalink.gmane.org/gmane.comp.file-systems.btrfs/9865 ) and I still get "Invalid cross-device link" error with Linux 3.2.4 while I try to do a cp --reflink between subvolumes. This is a *very* useful feature to have (think offline file-level

It seems that the BTRFS_IOC_CLONE ioctl fails when trying to do a cross-subvolume clone of a file. Chris Mason suggested in the past ([1]) that this should be possible. Am I missing something? [1] http://kerneltrap.org/mailarchive/linux-btrfs/2010/6/10/6884911 -- To unsubscribe from this list: send the line "unsubscribe li...

...har* linkname, const char* fname) { int src_desc=open(fname, O_RDONLY); if( src_desc<0) return false; int dst_desc=open(linkname, O_WRONLY | O_CREAT | O_EXCL, S_IRWXU | S_IRWXG); if( dst_desc<0 ) { close(src_desc); return false; } #define BTRFS_IOCTL_MAGIC 0x94 #define BTRFS_IOC_CLONE _IOW (BTRFS_IOCTL_MAGIC, 9, int) int rc=ioctl(dst_desc, BTRFS_IOC_CLONE, src_desc); close(src_desc); close(dst_desc); return rc==0; } int main(int argc, char* argv[]) { if(argc<3) { std::cout << "not enough arguments: reflink [source file] [dest file]" <&l...

...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...

https://bugzilla.samba.org/show_bug.cgi?id=10170 Summary: rsync should support reflink similar to cp --reflink Product: rsync Version: 3.1.0 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P5 Component: core AssignedTo: wayned at samba.org ReportedBy: samba at shubin.ca

This series adds an initial implementation for scrub. It works quite straightforward. The usermode issues an ioctl for each device in the fs. For each device, it enumerates the allocated device chunks. For each chunk, the contained extents are enumerated and the data checksums fetched. The extents are read sequentially and the checksums verified. If an error occurs (checksum or EIO), a good copy

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.