ceph: reconnect to the export targets on new mdsmaps
In the case where the export MDS has crashed just after the EImportStart journal is flushed, a standby MDS takes over for it and when replaying the EImportStart journal the MDS will wait the client to reconnect. That may never happen because the client may not have registered or opened the sessions yet. When receiving a new map, ensure we reconnect to valid export targets as well if their sessions don't exist yet. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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