Changes

==== Resolving sharing groups ====

==== Resolving sharing groups ====

Just after reading mounts from images in read_mnt_ns_img() when mount-v2 is enabled we have an additional step to collect sharing group information from mounts and turn it to sharing groups forest graph. First, we just walk over all mounts and create sharing group for each mount with unique shared_id + master_id pair, also we sew all mounts to corresponding sharing group with same id pair. Second, we walk over all sharing groups which has non-zero master_id and lookup the corresponding parent sharing groups and connect them with a tree.

Just after reading mounts from images in read_mnt_ns_img() when mount-v2 is enabled we have an additional step to collect sharing group information from mounts and turn it to sharing groups forest graph (resolve_shared_mounts_v2). First, we just walk over all mounts and create sharing group for each mount with unique shared_id + master_id pair, also we sew all mounts to corresponding sharing group with same id pair. Second, we walk over all sharing groups which has non-zero master_id and lookup the corresponding parent sharing groups and connect them with a tree.

There is also a case when master_id is non-zero but there is no corresponding parent sharing group, this means that outside of dumped container there is mount with matching shared_id - external slavery detected. For this case we just collect sibling sharing groups in list with empty parent link. Also we detect source path from which the master_id would be inherited either from some mountpoint-external mount or from root container mount.

There is also a case when master_id is non-zero but there is no corresponding parent sharing group, this means that outside of dumped container there is mount with matching shared_id - external slavery detected. For this case we just collect sibling sharing groups in list with empty parent link. Also we detect source path from which the master_id would be inherited either from some mountpoint-external mount or from root container mount.

to be continued...

to be continued...