From: Dmitry Yakunin <zeil@xxxxxxxxxxxxxx> Date: Fri, 3 Apr 2020 12:56:27 +0300 > This patch adds cgroup v2 ID to common inet diag message attributes. > Cgroup v2 ID is kernfs ID (ino or ino+gen). This attribute allows filter > inet diag output by cgroup ID obtained by name_to_handle_at() syscall. > When net_cls or net_prio cgroup is activated this ID is equal to 1 (root > cgroup ID) for newly created sockets. > > Some notes about this ID: > > 1) gets initialized in socket() syscall > 2) incoming socket gets ID from listening socket > (not during accept() syscall) > 3) not changed when process get moved to another cgroup > 4) can point to deleted cgroup (refcounting) > > v2: > - use CONFIG_SOCK_CGROUP_DATA instead if CONFIG_CGROUPS > > v3: > - fix attr size by using nla_total_size_64bit() (Eric Dumazet) > - more detailed commit message (Konstantin Khlebnikov) > > Signed-off-by: Dmitry Yakunin <zeil@xxxxxxxxxxxxxx> > Reviewed-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> As a new feature, this should be resubmitted when net-next opens back up. Thank you.
