On Sun, Jun 03, 2018 at 03:59:40PM -0700, Yonghong Song wrote: > bpf has been used extensively for tracing. For example, bcc > contains an almost full set of bpf-based tools to trace kernel > and user functions/events. Most tracing tools are currently > either filtered based on pid or system-wide. > > Containers have been used quite extensively in industry and > cgroup is often used together to provide resource isolation > and protection. Several processes may run inside the same > container. It is often desirable to get container-level tracing > results as well, e.g. syscall count, function count, I/O > activity, etc. > > This patch implements a new helper, bpf_get_current_cgroup_id(), > which will return cgroup id based on the cgroup within which > the current task is running. > > Patch #1 implements the new helper in the kernel. > Patch #2 syncs the uapi bpf.h header and helper between tools > and kernel. > Patch #3 shows how to get the same cgroup id in user space, > so a filter or policy could be configgured in the bpf program > based on current task cgroup. > > Changelog: > v1 -> v2: > . rebase to resolve merge conflict with latest bpf-next.
Applied, Thanks.
