]>
Commit | Line | Data |
---|---|---|
c7272ca7 DB |
1 | /* |
2 | * iplink_xdp.c XDP program loader | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Daniel Borkmann <daniel@iogearbox.net> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | ||
15 | #include <linux/bpf.h> | |
16 | ||
17 | #include "xdp.h" | |
18 | #include "bpf_util.h" | |
2f26065e | 19 | #include "ip_common.h" |
c7272ca7 DB |
20 | |
21 | extern int force; | |
22 | ||
a872b870 DB |
23 | struct xdp_req { |
24 | struct iplink_req *req; | |
25 | __u32 flags; | |
26 | }; | |
27 | ||
c7272ca7 DB |
28 | static void xdp_ebpf_cb(void *raw, int fd, const char *annotation) |
29 | { | |
a872b870 DB |
30 | struct xdp_req *xdp = raw; |
31 | struct iplink_req *req = xdp->req; | |
32 | struct rtattr *xdp_attr; | |
c7272ca7 | 33 | |
a872b870 | 34 | xdp_attr = addattr_nest(&req->n, sizeof(*req), IFLA_XDP); |
c7272ca7 | 35 | addattr32(&req->n, sizeof(*req), IFLA_XDP_FD, fd); |
a872b870 DB |
36 | if (xdp->flags) |
37 | addattr32(&req->n, sizeof(*req), IFLA_XDP_FLAGS, xdp->flags); | |
38 | addattr_nest_end(&req->n, xdp_attr); | |
c7272ca7 DB |
39 | } |
40 | ||
41 | static const struct bpf_cfg_ops bpf_cb_ops = { | |
42 | .ebpf_cb = xdp_ebpf_cb, | |
43 | }; | |
44 | ||
a872b870 | 45 | static int xdp_delete(struct xdp_req *xdp) |
c7272ca7 | 46 | { |
a872b870 | 47 | xdp_ebpf_cb(xdp, -1, NULL); |
c7272ca7 DB |
48 | return 0; |
49 | } | |
50 | ||
14683814 | 51 | int xdp_parse(int *argc, char ***argv, struct iplink_req *req, bool generic, |
1b5e8094 | 52 | bool drv, bool offload) |
c7272ca7 DB |
53 | { |
54 | struct bpf_cfg_in cfg = { | |
55 | .argc = *argc, | |
56 | .argv = *argv, | |
57 | }; | |
a872b870 DB |
58 | struct xdp_req xdp = { |
59 | .req = req, | |
60 | }; | |
61 | ||
62 | if (!force) | |
63 | xdp.flags |= XDP_FLAGS_UPDATE_IF_NOEXIST; | |
64 | if (generic) | |
65 | xdp.flags |= XDP_FLAGS_SKB_MODE; | |
14683814 JK |
66 | if (drv) |
67 | xdp.flags |= XDP_FLAGS_DRV_MODE; | |
1b5e8094 JK |
68 | if (offload) |
69 | xdp.flags |= XDP_FLAGS_HW_MODE; | |
c7272ca7 DB |
70 | |
71 | if (*argc == 1) { | |
72 | if (strcmp(**argv, "none") == 0 || | |
73 | strcmp(**argv, "off") == 0) | |
a872b870 | 74 | return xdp_delete(&xdp); |
c7272ca7 | 75 | } |
a872b870 DB |
76 | |
77 | if (bpf_parse_common(BPF_PROG_TYPE_XDP, &cfg, &bpf_cb_ops, &xdp)) | |
c7272ca7 DB |
78 | return -1; |
79 | ||
80 | *argc = cfg.argc; | |
81 | *argv = cfg.argv; | |
82 | return 0; | |
83 | } | |
84 | ||
a0b5b7cf | 85 | void xdp_dump(FILE *fp, struct rtattr *xdp, bool link, bool details) |
c7272ca7 DB |
86 | { |
87 | struct rtattr *tb[IFLA_XDP_MAX + 1]; | |
a0b5b7cf | 88 | __u32 prog_id = 0; |
077bb180 | 89 | __u8 mode; |
c7272ca7 DB |
90 | |
91 | parse_rtattr_nested(tb, IFLA_XDP_MAX, xdp); | |
a872b870 | 92 | |
077bb180 | 93 | if (!tb[IFLA_XDP_ATTACHED]) |
c7272ca7 DB |
94 | return; |
95 | ||
077bb180 | 96 | mode = rta_getattr_u8(tb[IFLA_XDP_ATTACHED]); |
2f26065e JF |
97 | if (is_json_context()) { |
98 | print_uint(PRINT_JSON, "attached", NULL, mode); | |
99 | } else { | |
100 | if (mode == XDP_ATTACHED_NONE) | |
101 | return; | |
a17a0114 SH |
102 | else if (details && link) |
103 | fprintf(fp, "%s prog/xdp", _SL_); | |
2f26065e JF |
104 | else if (mode == XDP_ATTACHED_DRV) |
105 | fprintf(fp, "xdp"); | |
106 | else if (mode == XDP_ATTACHED_SKB) | |
107 | fprintf(fp, "xdpgeneric"); | |
108 | else if (mode == XDP_ATTACHED_HW) | |
109 | fprintf(fp, "xdpoffload"); | |
110 | else | |
111 | fprintf(fp, "xdp[%u]", mode); | |
0b4ea60b | 112 | |
a17a0114 SH |
113 | if (tb[IFLA_XDP_PROG_ID]) |
114 | prog_id = rta_getattr_u32(tb[IFLA_XDP_PROG_ID]); | |
115 | if (!details) { | |
116 | if (prog_id && !link) | |
117 | fprintf(fp, "/id:%u", prog_id); | |
118 | fprintf(fp, " "); | |
119 | return; | |
120 | } | |
0b4ea60b | 121 | |
a17a0114 SH |
122 | if (prog_id) { |
123 | fprintf(fp, " "); | |
124 | bpf_dump_prog_info(fp, prog_id); | |
125 | } | |
a0b5b7cf | 126 | } |
c7272ca7 | 127 | } |