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netdev-genl: create a simple family for netdev stuff

Add a Netlink spec-compatible family for netdevs. This is a very simple implementation without much thought going into it. It allows us to reap all the benefits of Netlink specs, one can use the generic client to issue the commands: $ ./cli.py --spec netdev.yaml --dump dev_get [{'ifindex': 1, 'xdp-features': set()}, {'ifindex': 2, 'xdp-features': {'basic', 'ndo-xmit', 'redirect'}}, {'ifindex': 3, 'xdp-features': {'rx-sg'}}] the generic python library does not have flags-by-name support, yet, but we also don't have to carry strings in the messages, as user space can get the names from the spec.

Jakub Kicinski committed 3 years ago

Commit d3d854f1 parent 150809010 files · +477 −1Browse files

Showing the changes to include/uapi (1 of 10 files). Show all

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include/uapi/linux/netdev.h+59−0
@@ -0,0 +1,59 @@
1+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2+/* Do not edit directly, auto-generated from: */
3+/* Documentation/netlink/specs/netdev.yaml */
4+/* YNL-GEN uapi header */
5+
6+#ifndef _UAPI_LINUX_NETDEV_H
7+#define _UAPI_LINUX_NETDEV_H
8+
9+#define NETDEV_FAMILY_NAME "netdev"
10+#define NETDEV_FAMILY_VERSION 1
11+
12+/**
13+ * enum netdev_xdp_act
14+ * @NETDEV_XDP_ACT_BASIC: XDP feautues set supported by all drivers
15+ * (XDP_ABORTED, XDP_DROP, XDP_PASS, XDP_TX)
16+ * @NETDEV_XDP_ACT_REDIRECT: The netdev supports XDP_REDIRECT
17+ * @NETDEV_XDP_ACT_NDO_XMIT: This feature informs if netdev implements
18+ * ndo_xdp_xmit callback.
19+ * @NETDEV_XDP_ACT_XSK_ZEROCOPY: This feature informs if netdev supports AF_XDP
20+ * in zero copy mode.
21+ * @NETDEV_XDP_ACT_HW_OFFLOAD: This feature informs if netdev supports XDP hw
22+ * oflloading.
23+ * @NETDEV_XDP_ACT_RX_SG: This feature informs if netdev implements non-linear
24+ * XDP buffer support in the driver napi callback.
25+ * @NETDEV_XDP_ACT_NDO_XMIT_SG: This feature informs if netdev implements
26+ * non-linear XDP buffer support in ndo_xdp_xmit callback.
27+ */
28+enum netdev_xdp_act {
29+ NETDEV_XDP_ACT_BASIC = 1,
30+ NETDEV_XDP_ACT_REDIRECT = 2,
31+ NETDEV_XDP_ACT_NDO_XMIT = 4,
32+ NETDEV_XDP_ACT_XSK_ZEROCOPY = 8,
33+ NETDEV_XDP_ACT_HW_OFFLOAD = 16,
34+ NETDEV_XDP_ACT_RX_SG = 32,
35+ NETDEV_XDP_ACT_NDO_XMIT_SG = 64,
36+};
37+
38+enum {
39+ NETDEV_A_DEV_IFINDEX = 1,
40+ NETDEV_A_DEV_PAD,
41+ NETDEV_A_DEV_XDP_FEATURES,
42+
43+ __NETDEV_A_DEV_MAX,
44+ NETDEV_A_DEV_MAX = (__NETDEV_A_DEV_MAX - 1)
45+};
46+
47+enum {
48+ NETDEV_CMD_DEV_GET = 1,
49+ NETDEV_CMD_DEV_ADD_NTF,
50+ NETDEV_CMD_DEV_DEL_NTF,
51+ NETDEV_CMD_DEV_CHANGE_NTF,
52+
53+ __NETDEV_CMD_MAX,
54+ NETDEV_CMD_MAX = (__NETDEV_CMD_MAX - 1)
55+};
56+
57+#define NETDEV_MCGRP_MGMT "mgmt"
58+
59+#endif /* _UAPI_LINUX_NETDEV_H */

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