package vchan-xen
Xen Vchan implementation
Install
Dune Dependency
Authors
Maintainers
Sources
vchan-6.0.1.tbz
sha256=e44edd2133158ab628c54929f196a6440a25ca103a6af5c624d022a31781b95d
sha512=8507095e49d2c47d3aa71a62a2856dea3bce0607ee3f03cd9c4a7a93b2a0f6b53788ef0345ce1193a10048251f4bd0f6d1af74ba2191682686ec463653b17622
Description
README
README.md
This is an implementation of the Xen "libvchan" or "vchan" communication protocol in OCaml. It allows fast inter-domain communication using shared memory.
Linux configuration
Make sure your systems are properly configured. You may need to:
sudo modprobe xen-evtchn
sudo modprobe xen-gntdev
sudo modprobe xen-gntalloc
mount -t xenfs xenfs /proc/xen
To use in Linux
To connect as a server to a client with domid 'domid' and using the string 'port' to denote the connection:
open Vchan_lwt_unix
open_server ~domid ~port ()
>>= fun (ic, oc) ->
Lwt_io.write_line oc "hello"
>>= fun () ->
Lwt_io.flush oc
>>= fun () ->
Lwt_io.close ic
>>= fun () ->
Lwt_io.close oc
To connect as a client, replace open_server
with open_client
.
To use the command-line
On both of your VMs, find their domain ids:
xenstore-read domid
On the domain with domid <server domid>
, listen for a single connection from <client domid>
on <port>
:
xencat -l <client domid> <port>
On the domain with domid <client domid>
, connect to <server domid>
:
xencat <server domid> <port>
So to transfer a file foo
from domid 1 to domid 2:
On domain 2, listen for the connection and retrieve the file:
xencat -l 1 foo > copy-of-foo
On domain 1, transmit the file:
cat foo | xencat 2 foo
Dependencies (13)
- sexplib
-
xenstore_transport
>= "1.0.0"
-
mirage-xen
>= "7.0.0"
-
xenstore
>= "1.2.2"
-
mirage-flow
>= "2.0.0" & < "4.0.0"
- io-page
- ppx_cstruct
- ppx_sexp_conv
-
cstruct
>= "1.9.0"
-
lwt
>= "2.5.0"
-
vchan
= version
- dune
-
ocaml
>= "4.08.0"
Used by (1)
-
mirage-qubes
>= "0.5"
Conflicts
None
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