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== Protobuf messages ==
== Protobuf messages ==
criu_req/criu_resp -- wrappers for requests/responses. They are to be used for transferring messages. It is needed to provide compatibility with an older versions of rpc. Field type in them _must_ be set accordingly to type of request/response that is stored. Types of request/response are defined in enum criu_req_type.
criu_req/criu_resp -- wrappers for requests/responses. They are to be used for transferring messages and needed to provide compatibility with an older versions of rpc. Field type in them _must_ be set accordingly to type of request/response that is stored. Types of request/response are defined in enum criu_req_type.
=== criu_req ===
=== criu_req ===
optional criu_dump_req dump = 2;
optional criu_dump_req dump = 2;
}
</pre>
==== criu_req_type ====
There is only 1 request/response type for now.
<pre>enum criu_req_type {
EMPTY = 0;
DUMP = 1;
}
}
</pre>
</pre>
==== criu_dump_req ====
==== criu_dump_req ====
It is used to store dump options.
<pre>message criu_dump_req {
<pre>message criu_dump_req {
required int32 images_dir_fd = 1;
required int32 images_dir_fd = 1;
Field "restored" is set to "true" if process was restored.
Field "restored" is set to "true" if process was restored.
== Server ==
== Run ==
=== Server ===
On a server side, CRIU creates SOCK_SEQPACKET Unix socket and listens for connections on it. After receiving criu_req, CRIU processes it, do what is requested and sends response back.
On a server side, CRIU creates SOCK_SEQPACKET Unix socket and listens for connections on it. After receiving criu_req, CRIU processes it, do what is requested and sends response back.
For the full list of options, please run "criu -h".
For the full list of options, please run "criu -h".
== Client ==
=== Client ===
Client, in its turn, must connect to service socket, send criu_msg with request in it, and wait for a criu_resp with response.
Client, in its turn, must connect to service socket, send criu_msg with request in it, and wait for a criu_resp with response.
You can find examples of client programs in C and Python in test/rpc/.
You can find examples of client programs in C and Python in test/rpc/.