tree 616e2e95525d86dc457a5cfc8a63adf93dc01e46
parent 91e70c95b4823cf05e4d6df102143e3f02468ff9
author Paul Kirth <paulkirth@google.com> 1594660713 +0000
committer Paul Kirth <paulkirth@google.com> 1596582841 +0000

Create ResourceManager class for allocd

The Resource manager services requests for static resources, and
manages them for the duration of the request.

Each time a client connects, it requests a new resource,
such as a network interface, through a UNIX domain socket.

Upon receiving the request, the manager tries to allocate the
requested resources, and communicates the status of the request
back to the client.

Currently, clients must request resources to be deallocated, but
the ResourceManager will deallocate all owned resources when
it receives a shutdown request, and its lifetime ends.

Future implementations can modify the current behavior to tie the
lifetime of a resource to another mechanism, such as a long
lived TCP connection w/ a heartbeat to prevent clients from leaking
static resources.

Supported request types are defined in Request.h

Operations are as follows:
Request ID: Allocates a new global ID
Create Interface: Adds a new network interface of the requested type
                 (mtap, wtap, wbr)
Destroy Interface: Removes the specified interface and if it is
                  managed, and perform necessary cleanup
Shutdown: Stops the daemon, and releases all acquired resources

Bug: 148823285
Test: None
Change-Id: Idb1ba21217ae8b672624be173650bedf8dc99780