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https://github.com/checkpoint-restore/criu
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Instead of scanning btrfs subvolumes (which can be even unaccessbile if mount point lays on directory instead of subvolume itself) we use path resolving feature here -- once we need to figure out if some device number need to be altered up to mount point (as we know stat() called on subvolume returns st_dev for subvolume itself, but not one that associated with a superblock and shown in /proc/self/mountinfo output). This as well implies that we need to check if device number for ghost files are to be updated to match mountinfo, thus we use phys_stat_resolve_dev helper here. After this patch the previously merged btrfs engine is no longer needed (at least it seems so) and can be dropped. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
criu ==== An utility to checkpoint/restore tasks. Some code snippets are borrowed from - Linux kernel (http://kernel.org/) - git (http://git-scm.com/) - kvm-tools (https://github.com/penberg/linux-kvm) - ptrace-parasite (https://code.google.com/p/ptrace-parasite/) Many thanks to these projects. Licensed under GPLv2 (http://www.gnu.org/licenses/gpl-2.0.txt)