criu/images/macvlan.proto

// SPDX-License-Identifier: MIT

syntax = "proto2";

message macvlan_link_entry {
	required uint32	mode	= 1;
	optional uint32 flags	= 2;
}
images: re-license as Expat license (so-called MIT) This changes the license of all files in the images/ directory from GPLv2 to the Expat license (so-called MIT). According to git the files have been authored by: Abhishek Dubey Adrian Reber Alexander Mikhalitsyn Alice Frosi Andrei Vagin (Andrew Vagin, Andrey Vagin) Cyrill Gorcunov Dengguangxing Dmitry Safonov Guoyun Sun Kirill Tkhai Kir Kolyshkin Laurent Dufour Michael Holzheu Michał Cłapiński Mike Rapoport Nicolas Viennot Nikita Spiridonov Pavel Emelianov (Pavel Emelyanov) Pavel Tikhomirov Radostin Stoyanov rbruno@gsd.inesc-id.pt Sebastian Pipping Stanislav Kinsburskiy Tycho Andersen Valeriy Vdovin The Expat license (so-called MIT) can be found here: https://opensource.org/licenses/MIT According to that link the correct SPDX short identifier is 'MIT'. https://spdx.org/licenses/MIT.html Signed-off-by: Adrian Reber <areber@redhat.com> 2020-05-08 11:36:57 +00:00			`// SPDX-License-Identifier: MIT`

images: add syntax declaration to macvlan.proto travis-ci: success for images: add syntax declaration to macvlan.proto Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com> 2016-10-22 00:54:00 +03:00			`syntax = "proto2";`

net: add support for macvlan link types While this is in principle similar to how veths are handled, we have to do things in two different ways depending on whether or not there is a user namespace involved, because there is no way to ask the kernel to attach a macvlan NIC to a device in a net ns that we don't have CAP_NET_ADMIN in. So we do it in two ways: a. If we are in a user namespace, we create the device in usernsd and use IFLA_NET_NS_FD to set the netns which it should be created in (saving us a "move into this netns" step). b. If we aren't in a user namespace, we could still be in a net namespace, so we use IFLA_LINK_NETNSID to set namespace that the i/o device will be in. Then we open a netlink socket from criu's netns and use IFLA_NET_NS_FD to tell the kernel to create the macvlan device in the target's namespace. v2: * s/CLONE_NEWNET/CLONE_NEWUSER * Don't bother to dump IFLA_LINK and IFLA_LINK_NETNSID. Although we need to provide these on restore, there's no kernel interface that persists these. To populate IFLA_LINK, we require users pass --macvlan-pair, and we create a NETNSID relation as needed and pass that in for macvlan links (although this infrastructure could be used elsewhere for links that need it in the future, since is in the hoisted populate_newlink_req()). * use new external command instead of creating a --macvlan-pair option v3: add a feature check for linux/net_namespace.h, since not every arch in travis has this (new-ish) header v4: * include sys/types.h instead of linux/if.h to get IFF_UP flag * remove old doc addition about --macvlan-pair option v5: define IFLA_LINK_NETNSID and RTM_NEWNSID if they don't exist v6: define IFLA_MACVLAN_FLAGS and bump the size of IFLA_MACVLAN_MAX when necessary v7: * remove unused struct macvlan_pair * split feature test for linux/net_namespace.h into separate patch * move IFLA_INFO_MAX testing in dump_one_netdev to the right patch * add documents for netwlink_extras fields * split changeflags into separate patch * use existing netnsid if we get EEXIST * move macvlan code to a helper function * use netnsid to restore in userns case, and not pid v8: * define RTM_GETNSID since we use that too now :) * don't bother with IFLA_MACVLAN_MAX; we only understand things up to IFLA_MACVLAN_FLAGS, so let's just use that as our max instead. The problem with using macros here, is that IFLA_MACLAN_MAX is defined as a macro with an enum expansion in it, so we get bitten by the enum not being available at preprocessing time, and implicit zero coercion when testing against its value for stuff. Yeesh. v10: * add some comments about when we set up NET_NS_FD and why we use IFLA_LINK and IFLA_NET_NS_ID * use the socket opened in restore_links() instead of opening one in restore_one_macvlan() * split the new argument to restore_one_link into its own patch travis-ci: success for series starting with [v10,01/11] net: pass the struct nlattrs to dump() functions Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com> 2016-10-20 10:25:28 -06:00			`message macvlan_link_entry {`
			`required uint32 mode = 1;`
			`optional uint32 flags = 2;`
			`}`