We don't know a state behind an external socket. It depends on logic
of the program, which handles this socket.
This patch adds ability to load a library with callbacks for dumping
and restoring external sockets.
This patch introduces two callbacks cr_plugin_dump_unix_sk and
cr_plugin_restore_unix_sk. If a callback can not handle a socket, it
must return -ENOTSUP.
The main questions, what kind of information should be tranfered in
these callbacks. Pls, think a few minutes about that and send me
your opinion.
v2: Use uflags instread of adding a new field
v3: clean up
v4: Unsuitable callbacks return -ENOTSUP.
v5: set USK_CALLBACK, if a socket was dumped by callback.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Libraries (plugins) is going to be used for dumping and restoring
external dependencies (e.g. dbus, systemd journal sockets, charecter
devices, etc)
A plugin can have the cr_plugin_init() and cr_plugin_fini functions for
initialization and deinialization.
criu-plugin.h contains all things, which can be used in plugins.
v2: rename lib to plugin
v3: add a default value for a plugin path.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
