runsc: Synchronize container metadata changes with a file lock.

Each container has associated metadata (particularly the container status) that
is manipulated by various runsc commands. This metadata is stored in a file
identified by the container id.

Different runsc processes may manipulate the same container metadata, and each
will read/write to the metadata file.

This CL adds a file lock per container which must be held when reading the
container metadata file, and when modifying and writing the container metadata.

PiperOrigin-RevId: 214019179
Change-Id: Ice4390ad233bc7f216c9a9a6cf05fb456c9ec0ad

0 files changed, 0 insertions, 0 deletions