1 // SPDX-License-Identifier: (GPL-2.0-only OR B 1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 // Copyright (C) 2018 Facebook 2 // Copyright (C) 2018 Facebook
3 3
4 #ifndef _GNU_SOURCE 4 #ifndef _GNU_SOURCE
5 #define _GNU_SOURCE 5 #define _GNU_SOURCE
6 #endif 6 #endif
7 #include <errno.h> 7 #include <errno.h>
8 #include <fcntl.h> 8 #include <fcntl.h>
9 #include <stdlib.h> 9 #include <stdlib.h>
10 #include <string.h> 10 #include <string.h>
11 #include <time.h> 11 #include <time.h>
12 #include <unistd.h> 12 #include <unistd.h>
13 #include <bpf/bpf.h> 13 #include <bpf/bpf.h>
14 #include <bpf/libbpf.h> 14 #include <bpf/libbpf.h>
15 #include <net/if.h> 15 #include <net/if.h>
16 #include <linux/rtnetlink.h> 16 #include <linux/rtnetlink.h>
17 #include <linux/socket.h> 17 #include <linux/socket.h>
18 #include <linux/tc_act/tc_bpf.h> 18 #include <linux/tc_act/tc_bpf.h>
19 #include <sys/socket.h> 19 #include <sys/socket.h>
20 #include <sys/stat.h> 20 #include <sys/stat.h>
21 #include <sys/types.h> 21 #include <sys/types.h>
22 22
23 #include "bpf/nlattr.h" 23 #include "bpf/nlattr.h"
24 #include "main.h" 24 #include "main.h"
25 #include "netlink_dumper.h" 25 #include "netlink_dumper.h"
26 26
27 #ifndef SOL_NETLINK 27 #ifndef SOL_NETLINK
28 #define SOL_NETLINK 270 28 #define SOL_NETLINK 270
29 #endif 29 #endif
30 30
31 struct ip_devname_ifindex { 31 struct ip_devname_ifindex {
32 char devname[64]; 32 char devname[64];
33 int ifindex; 33 int ifindex;
34 }; 34 };
35 35
36 struct bpf_netdev_t { 36 struct bpf_netdev_t {
37 struct ip_devname_ifindex *devices; 37 struct ip_devname_ifindex *devices;
38 int used_len; 38 int used_len;
39 int array_len; 39 int array_len;
40 int filter_idx; 40 int filter_idx;
41 }; 41 };
42 42
43 struct tc_kind_handle { 43 struct tc_kind_handle {
44 char kind[64]; 44 char kind[64];
45 int handle; 45 int handle;
46 }; 46 };
47 47
48 struct bpf_tcinfo_t { 48 struct bpf_tcinfo_t {
49 struct tc_kind_handle *handle_array; 49 struct tc_kind_handle *handle_array;
50 int used_len; 50 int used_len;
51 int array_len; 51 int array_len;
52 bool is_qdisc; 52 bool is_qdisc;
53 }; 53 };
54 54
55 struct bpf_filter_t { 55 struct bpf_filter_t {
56 const char *kind; 56 const char *kind;
57 const char *devname; 57 const char *devname;
58 int ifindex; 58 int ifindex;
59 }; 59 };
60 60
61 struct bpf_attach_info { 61 struct bpf_attach_info {
62 __u32 flow_dissector_id; 62 __u32 flow_dissector_id;
63 }; 63 };
64 64
65 enum net_attach_type { 65 enum net_attach_type {
66 NET_ATTACH_TYPE_XDP, 66 NET_ATTACH_TYPE_XDP,
67 NET_ATTACH_TYPE_XDP_GENERIC, 67 NET_ATTACH_TYPE_XDP_GENERIC,
68 NET_ATTACH_TYPE_XDP_DRIVER, 68 NET_ATTACH_TYPE_XDP_DRIVER,
69 NET_ATTACH_TYPE_XDP_OFFLOAD, 69 NET_ATTACH_TYPE_XDP_OFFLOAD,
70 NET_ATTACH_TYPE_TCX_INGRESS, 70 NET_ATTACH_TYPE_TCX_INGRESS,
71 NET_ATTACH_TYPE_TCX_EGRESS, 71 NET_ATTACH_TYPE_TCX_EGRESS,
72 }; 72 };
73 73
74 static const char * const attach_type_strings[ 74 static const char * const attach_type_strings[] = {
75 [NET_ATTACH_TYPE_XDP] = "xdp 75 [NET_ATTACH_TYPE_XDP] = "xdp",
76 [NET_ATTACH_TYPE_XDP_GENERIC] = "xdp 76 [NET_ATTACH_TYPE_XDP_GENERIC] = "xdpgeneric",
77 [NET_ATTACH_TYPE_XDP_DRIVER] = "xdp 77 [NET_ATTACH_TYPE_XDP_DRIVER] = "xdpdrv",
78 [NET_ATTACH_TYPE_XDP_OFFLOAD] = "xdp 78 [NET_ATTACH_TYPE_XDP_OFFLOAD] = "xdpoffload",
79 [NET_ATTACH_TYPE_TCX_INGRESS] = "tcx 79 [NET_ATTACH_TYPE_TCX_INGRESS] = "tcx_ingress",
80 [NET_ATTACH_TYPE_TCX_EGRESS] = "tcx 80 [NET_ATTACH_TYPE_TCX_EGRESS] = "tcx_egress",
81 }; 81 };
82 82
83 static const char * const attach_loc_strings[] 83 static const char * const attach_loc_strings[] = {
84 [BPF_TCX_INGRESS] = "tcx 84 [BPF_TCX_INGRESS] = "tcx/ingress",
85 [BPF_TCX_EGRESS] = "tcx 85 [BPF_TCX_EGRESS] = "tcx/egress",
86 [BPF_NETKIT_PRIMARY] = "net 86 [BPF_NETKIT_PRIMARY] = "netkit/primary",
87 [BPF_NETKIT_PEER] = "net 87 [BPF_NETKIT_PEER] = "netkit/peer",
88 }; 88 };
89 89
90 const size_t net_attach_type_size = ARRAY_SIZE 90 const size_t net_attach_type_size = ARRAY_SIZE(attach_type_strings);
91 91
92 static enum net_attach_type parse_attach_type( 92 static enum net_attach_type parse_attach_type(const char *str)
93 { 93 {
94 enum net_attach_type type; 94 enum net_attach_type type;
95 95
96 for (type = 0; type < net_attach_type_ 96 for (type = 0; type < net_attach_type_size; type++) {
97 if (attach_type_strings[type] 97 if (attach_type_strings[type] &&
98 is_prefix(str, attach_type 98 is_prefix(str, attach_type_strings[type]))
99 return type; 99 return type;
100 } 100 }
101 101
102 return net_attach_type_size; 102 return net_attach_type_size;
103 } 103 }
104 104
105 typedef int (*dump_nlmsg_t)(void *cookie, void 105 typedef int (*dump_nlmsg_t)(void *cookie, void *msg, struct nlattr **tb);
106 106
107 typedef int (*__dump_nlmsg_t)(struct nlmsghdr 107 typedef int (*__dump_nlmsg_t)(struct nlmsghdr *nlmsg, dump_nlmsg_t, void *cookie);
108 108
109 static int netlink_open(__u32 *nl_pid) 109 static int netlink_open(__u32 *nl_pid)
110 { 110 {
111 struct sockaddr_nl sa; 111 struct sockaddr_nl sa;
112 socklen_t addrlen; 112 socklen_t addrlen;
113 int one = 1, ret; 113 int one = 1, ret;
114 int sock; 114 int sock;
115 115
116 memset(&sa, 0, sizeof(sa)); 116 memset(&sa, 0, sizeof(sa));
117 sa.nl_family = AF_NETLINK; 117 sa.nl_family = AF_NETLINK;
118 118
119 sock = socket(AF_NETLINK, SOCK_RAW, NE 119 sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
120 if (sock < 0) 120 if (sock < 0)
121 return -errno; 121 return -errno;
122 122
123 if (setsockopt(sock, SOL_NETLINK, NETL 123 if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
124 &one, sizeof(one)) < 0) 124 &one, sizeof(one)) < 0) {
125 p_err("Netlink error reporting 125 p_err("Netlink error reporting not supported");
126 } 126 }
127 127
128 if (bind(sock, (struct sockaddr *)&sa, 128 if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
129 ret = -errno; 129 ret = -errno;
130 goto cleanup; 130 goto cleanup;
131 } 131 }
132 132
133 addrlen = sizeof(sa); 133 addrlen = sizeof(sa);
134 if (getsockname(sock, (struct sockaddr 134 if (getsockname(sock, (struct sockaddr *)&sa, &addrlen) < 0) {
135 ret = -errno; 135 ret = -errno;
136 goto cleanup; 136 goto cleanup;
137 } 137 }
138 138
139 if (addrlen != sizeof(sa)) { 139 if (addrlen != sizeof(sa)) {
140 ret = -LIBBPF_ERRNO__INTERNAL; 140 ret = -LIBBPF_ERRNO__INTERNAL;
141 goto cleanup; 141 goto cleanup;
142 } 142 }
143 143
144 *nl_pid = sa.nl_pid; 144 *nl_pid = sa.nl_pid;
145 return sock; 145 return sock;
146 146
147 cleanup: 147 cleanup:
148 close(sock); 148 close(sock);
149 return ret; 149 return ret;
150 } 150 }
151 151
152 static int netlink_recv(int sock, __u32 nl_pid 152 static int netlink_recv(int sock, __u32 nl_pid, __u32 seq,
153 __dump_nlmsg_t _fn 153 __dump_nlmsg_t _fn, dump_nlmsg_t fn,
154 void *cookie) 154 void *cookie)
155 { 155 {
156 bool multipart = true; 156 bool multipart = true;
157 struct nlmsgerr *err; 157 struct nlmsgerr *err;
158 struct nlmsghdr *nh; 158 struct nlmsghdr *nh;
159 char buf[4096]; 159 char buf[4096];
160 int len, ret; 160 int len, ret;
161 161
162 while (multipart) { 162 while (multipart) {
163 multipart = false; 163 multipart = false;
164 len = recv(sock, buf, sizeof(b 164 len = recv(sock, buf, sizeof(buf), 0);
165 if (len < 0) { 165 if (len < 0) {
166 ret = -errno; 166 ret = -errno;
167 goto done; 167 goto done;
168 } 168 }
169 169
170 if (len == 0) 170 if (len == 0)
171 break; 171 break;
172 172
173 for (nh = (struct nlmsghdr *)b 173 for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, (unsigned int)len);
174 nh = NLMSG_NEXT(nh, len)) 174 nh = NLMSG_NEXT(nh, len)) {
175 if (nh->nlmsg_pid != n 175 if (nh->nlmsg_pid != nl_pid) {
176 ret = -LIBBPF_ 176 ret = -LIBBPF_ERRNO__WRNGPID;
177 goto done; 177 goto done;
178 } 178 }
179 if (nh->nlmsg_seq != s 179 if (nh->nlmsg_seq != seq) {
180 ret = -LIBBPF_ 180 ret = -LIBBPF_ERRNO__INVSEQ;
181 goto done; 181 goto done;
182 } 182 }
183 if (nh->nlmsg_flags & 183 if (nh->nlmsg_flags & NLM_F_MULTI)
184 multipart = tr 184 multipart = true;
185 switch (nh->nlmsg_type 185 switch (nh->nlmsg_type) {
186 case NLMSG_ERROR: 186 case NLMSG_ERROR:
187 err = (struct 187 err = (struct nlmsgerr *)NLMSG_DATA(nh);
188 if (!err->erro 188 if (!err->error)
189 contin 189 continue;
190 ret = err->err 190 ret = err->error;
191 libbpf_nla_dum 191 libbpf_nla_dump_errormsg(nh);
192 goto done; 192 goto done;
193 case NLMSG_DONE: 193 case NLMSG_DONE:
194 return 0; 194 return 0;
195 default: 195 default:
196 break; 196 break;
197 } 197 }
198 if (_fn) { 198 if (_fn) {
199 ret = _fn(nh, 199 ret = _fn(nh, fn, cookie);
200 if (ret) 200 if (ret)
201 return 201 return ret;
202 } 202 }
203 } 203 }
204 } 204 }
205 ret = 0; 205 ret = 0;
206 done: 206 done:
207 return ret; 207 return ret;
208 } 208 }
209 209
210 static int __dump_class_nlmsg(struct nlmsghdr 210 static int __dump_class_nlmsg(struct nlmsghdr *nlh,
211 dump_nlmsg_t dum 211 dump_nlmsg_t dump_class_nlmsg,
212 void *cookie) 212 void *cookie)
213 { 213 {
214 struct nlattr *tb[TCA_MAX + 1], *attr; 214 struct nlattr *tb[TCA_MAX + 1], *attr;
215 struct tcmsg *t = NLMSG_DATA(nlh); 215 struct tcmsg *t = NLMSG_DATA(nlh);
216 int len; 216 int len;
217 217
218 len = nlh->nlmsg_len - NLMSG_LENGTH(si 218 len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
219 attr = (struct nlattr *) ((void *) t + 219 attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
220 if (libbpf_nla_parse(tb, TCA_MAX, attr 220 if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
221 return -LIBBPF_ERRNO__NLPARSE; 221 return -LIBBPF_ERRNO__NLPARSE;
222 222
223 return dump_class_nlmsg(cookie, t, tb) 223 return dump_class_nlmsg(cookie, t, tb);
224 } 224 }
225 225
226 static int netlink_get_class(int sock, unsigne 226 static int netlink_get_class(int sock, unsigned int nl_pid, int ifindex,
227 dump_nlmsg_t dump 227 dump_nlmsg_t dump_class_nlmsg, void *cookie)
228 { 228 {
229 struct { 229 struct {
230 struct nlmsghdr nlh; 230 struct nlmsghdr nlh;
231 struct tcmsg t; 231 struct tcmsg t;
232 } req = { 232 } req = {
233 .nlh.nlmsg_len = NLMSG_LENGTH( 233 .nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
234 .nlh.nlmsg_type = RTM_GETTCLAS 234 .nlh.nlmsg_type = RTM_GETTCLASS,
235 .nlh.nlmsg_flags = NLM_F_DUMP 235 .nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
236 .t.tcm_family = AF_UNSPEC, 236 .t.tcm_family = AF_UNSPEC,
237 .t.tcm_ifindex = ifindex, 237 .t.tcm_ifindex = ifindex,
238 }; 238 };
239 int seq = time(NULL); 239 int seq = time(NULL);
240 240
241 req.nlh.nlmsg_seq = seq; 241 req.nlh.nlmsg_seq = seq;
242 if (send(sock, &req, req.nlh.nlmsg_len 242 if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
243 return -errno; 243 return -errno;
244 244
245 return netlink_recv(sock, nl_pid, seq, 245 return netlink_recv(sock, nl_pid, seq, __dump_class_nlmsg,
246 dump_class_nlmsg, 246 dump_class_nlmsg, cookie);
247 } 247 }
248 248
249 static int __dump_qdisc_nlmsg(struct nlmsghdr 249 static int __dump_qdisc_nlmsg(struct nlmsghdr *nlh,
250 dump_nlmsg_t dum 250 dump_nlmsg_t dump_qdisc_nlmsg,
251 void *cookie) 251 void *cookie)
252 { 252 {
253 struct nlattr *tb[TCA_MAX + 1], *attr; 253 struct nlattr *tb[TCA_MAX + 1], *attr;
254 struct tcmsg *t = NLMSG_DATA(nlh); 254 struct tcmsg *t = NLMSG_DATA(nlh);
255 int len; 255 int len;
256 256
257 len = nlh->nlmsg_len - NLMSG_LENGTH(si 257 len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
258 attr = (struct nlattr *) ((void *) t + 258 attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
259 if (libbpf_nla_parse(tb, TCA_MAX, attr 259 if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
260 return -LIBBPF_ERRNO__NLPARSE; 260 return -LIBBPF_ERRNO__NLPARSE;
261 261
262 return dump_qdisc_nlmsg(cookie, t, tb) 262 return dump_qdisc_nlmsg(cookie, t, tb);
263 } 263 }
264 264
265 static int netlink_get_qdisc(int sock, unsigne 265 static int netlink_get_qdisc(int sock, unsigned int nl_pid, int ifindex,
266 dump_nlmsg_t dump 266 dump_nlmsg_t dump_qdisc_nlmsg, void *cookie)
267 { 267 {
268 struct { 268 struct {
269 struct nlmsghdr nlh; 269 struct nlmsghdr nlh;
270 struct tcmsg t; 270 struct tcmsg t;
271 } req = { 271 } req = {
272 .nlh.nlmsg_len = NLMSG_LENGTH( 272 .nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
273 .nlh.nlmsg_type = RTM_GETQDISC 273 .nlh.nlmsg_type = RTM_GETQDISC,
274 .nlh.nlmsg_flags = NLM_F_DUMP 274 .nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
275 .t.tcm_family = AF_UNSPEC, 275 .t.tcm_family = AF_UNSPEC,
276 .t.tcm_ifindex = ifindex, 276 .t.tcm_ifindex = ifindex,
277 }; 277 };
278 int seq = time(NULL); 278 int seq = time(NULL);
279 279
280 req.nlh.nlmsg_seq = seq; 280 req.nlh.nlmsg_seq = seq;
281 if (send(sock, &req, req.nlh.nlmsg_len 281 if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
282 return -errno; 282 return -errno;
283 283
284 return netlink_recv(sock, nl_pid, seq, 284 return netlink_recv(sock, nl_pid, seq, __dump_qdisc_nlmsg,
285 dump_qdisc_nlmsg, 285 dump_qdisc_nlmsg, cookie);
286 } 286 }
287 287
288 static int __dump_filter_nlmsg(struct nlmsghdr 288 static int __dump_filter_nlmsg(struct nlmsghdr *nlh,
289 dump_nlmsg_t du 289 dump_nlmsg_t dump_filter_nlmsg,
290 void *cookie) 290 void *cookie)
291 { 291 {
292 struct nlattr *tb[TCA_MAX + 1], *attr; 292 struct nlattr *tb[TCA_MAX + 1], *attr;
293 struct tcmsg *t = NLMSG_DATA(nlh); 293 struct tcmsg *t = NLMSG_DATA(nlh);
294 int len; 294 int len;
295 295
296 len = nlh->nlmsg_len - NLMSG_LENGTH(si 296 len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*t));
297 attr = (struct nlattr *) ((void *) t + 297 attr = (struct nlattr *) ((void *) t + NLMSG_ALIGN(sizeof(*t)));
298 if (libbpf_nla_parse(tb, TCA_MAX, attr 298 if (libbpf_nla_parse(tb, TCA_MAX, attr, len, NULL) != 0)
299 return -LIBBPF_ERRNO__NLPARSE; 299 return -LIBBPF_ERRNO__NLPARSE;
300 300
301 return dump_filter_nlmsg(cookie, t, tb 301 return dump_filter_nlmsg(cookie, t, tb);
302 } 302 }
303 303
304 static int netlink_get_filter(int sock, unsign 304 static int netlink_get_filter(int sock, unsigned int nl_pid, int ifindex, int handle,
305 dump_nlmsg_t dum 305 dump_nlmsg_t dump_filter_nlmsg, void *cookie)
306 { 306 {
307 struct { 307 struct {
308 struct nlmsghdr nlh; 308 struct nlmsghdr nlh;
309 struct tcmsg t; 309 struct tcmsg t;
310 } req = { 310 } req = {
311 .nlh.nlmsg_len = NLMSG_LENGTH( 311 .nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
312 .nlh.nlmsg_type = RTM_GETTFILT 312 .nlh.nlmsg_type = RTM_GETTFILTER,
313 .nlh.nlmsg_flags = NLM_F_DUMP 313 .nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
314 .t.tcm_family = AF_UNSPEC, 314 .t.tcm_family = AF_UNSPEC,
315 .t.tcm_ifindex = ifindex, 315 .t.tcm_ifindex = ifindex,
316 .t.tcm_parent = handle, 316 .t.tcm_parent = handle,
317 }; 317 };
318 int seq = time(NULL); 318 int seq = time(NULL);
319 319
320 req.nlh.nlmsg_seq = seq; 320 req.nlh.nlmsg_seq = seq;
321 if (send(sock, &req, req.nlh.nlmsg_len 321 if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
322 return -errno; 322 return -errno;
323 323
324 return netlink_recv(sock, nl_pid, seq, 324 return netlink_recv(sock, nl_pid, seq, __dump_filter_nlmsg,
325 dump_filter_nlmsg, 325 dump_filter_nlmsg, cookie);
326 } 326 }
327 327
328 static int __dump_link_nlmsg(struct nlmsghdr * 328 static int __dump_link_nlmsg(struct nlmsghdr *nlh,
329 dump_nlmsg_t dump 329 dump_nlmsg_t dump_link_nlmsg, void *cookie)
330 { 330 {
331 struct nlattr *tb[IFLA_MAX + 1], *attr 331 struct nlattr *tb[IFLA_MAX + 1], *attr;
332 struct ifinfomsg *ifi = NLMSG_DATA(nlh 332 struct ifinfomsg *ifi = NLMSG_DATA(nlh);
333 int len; 333 int len;
334 334
335 len = nlh->nlmsg_len - NLMSG_LENGTH(si 335 len = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
336 attr = (struct nlattr *) ((void *) ifi 336 attr = (struct nlattr *) ((void *) ifi + NLMSG_ALIGN(sizeof(*ifi)));
337 if (libbpf_nla_parse(tb, IFLA_MAX, att 337 if (libbpf_nla_parse(tb, IFLA_MAX, attr, len, NULL) != 0)
338 return -LIBBPF_ERRNO__NLPARSE; 338 return -LIBBPF_ERRNO__NLPARSE;
339 339
340 return dump_link_nlmsg(cookie, ifi, tb 340 return dump_link_nlmsg(cookie, ifi, tb);
341 } 341 }
342 342
343 static int netlink_get_link(int sock, unsigned 343 static int netlink_get_link(int sock, unsigned int nl_pid,
344 dump_nlmsg_t dump_ 344 dump_nlmsg_t dump_link_nlmsg, void *cookie)
345 { 345 {
346 struct { 346 struct {
347 struct nlmsghdr nlh; 347 struct nlmsghdr nlh;
348 struct ifinfomsg ifm; 348 struct ifinfomsg ifm;
349 } req = { 349 } req = {
350 .nlh.nlmsg_len = NLMSG_LENGTH( 350 .nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
351 .nlh.nlmsg_type = RTM_GETLINK, 351 .nlh.nlmsg_type = RTM_GETLINK,
352 .nlh.nlmsg_flags = NLM_F_DUMP 352 .nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
353 .ifm.ifi_family = AF_PACKET, 353 .ifm.ifi_family = AF_PACKET,
354 }; 354 };
355 int seq = time(NULL); 355 int seq = time(NULL);
356 356
357 req.nlh.nlmsg_seq = seq; 357 req.nlh.nlmsg_seq = seq;
358 if (send(sock, &req, req.nlh.nlmsg_len 358 if (send(sock, &req, req.nlh.nlmsg_len, 0) < 0)
359 return -errno; 359 return -errno;
360 360
361 return netlink_recv(sock, nl_pid, seq, 361 return netlink_recv(sock, nl_pid, seq, __dump_link_nlmsg,
362 dump_link_nlmsg, c 362 dump_link_nlmsg, cookie);
363 } 363 }
364 364
365 static int dump_link_nlmsg(void *cookie, void 365 static int dump_link_nlmsg(void *cookie, void *msg, struct nlattr **tb)
366 { 366 {
367 struct bpf_netdev_t *netinfo = cookie; 367 struct bpf_netdev_t *netinfo = cookie;
368 struct ifinfomsg *ifinfo = msg; 368 struct ifinfomsg *ifinfo = msg;
369 369
370 if (netinfo->filter_idx > 0 && netinfo 370 if (netinfo->filter_idx > 0 && netinfo->filter_idx != ifinfo->ifi_index)
371 return 0; 371 return 0;
372 372
373 if (netinfo->used_len == netinfo->arra 373 if (netinfo->used_len == netinfo->array_len) {
374 netinfo->devices = realloc(net 374 netinfo->devices = realloc(netinfo->devices,
375 (netinfo->array_len + 375 (netinfo->array_len + 16) *
376 sizeof(struct ip_devna 376 sizeof(struct ip_devname_ifindex));
377 if (!netinfo->devices) 377 if (!netinfo->devices)
378 return -ENOMEM; 378 return -ENOMEM;
379 379
380 netinfo->array_len += 16; 380 netinfo->array_len += 16;
381 } 381 }
382 netinfo->devices[netinfo->used_len].if 382 netinfo->devices[netinfo->used_len].ifindex = ifinfo->ifi_index;
383 snprintf(netinfo->devices[netinfo->use 383 snprintf(netinfo->devices[netinfo->used_len].devname,
384 sizeof(netinfo->devices[netin 384 sizeof(netinfo->devices[netinfo->used_len].devname),
385 "%s", 385 "%s",
386 tb[IFLA_IFNAME] 386 tb[IFLA_IFNAME]
387 ? libbpf_nla_getattr_ 387 ? libbpf_nla_getattr_str(tb[IFLA_IFNAME])
388 : ""); 388 : "");
389 netinfo->used_len++; 389 netinfo->used_len++;
390 390
391 return do_xdp_dump(ifinfo, tb); 391 return do_xdp_dump(ifinfo, tb);
392 } 392 }
393 393
394 static int dump_class_qdisc_nlmsg(void *cookie 394 static int dump_class_qdisc_nlmsg(void *cookie, void *msg, struct nlattr **tb)
395 { 395 {
396 struct bpf_tcinfo_t *tcinfo = cookie; 396 struct bpf_tcinfo_t *tcinfo = cookie;
397 struct tcmsg *info = msg; 397 struct tcmsg *info = msg;
398 398
399 if (tcinfo->is_qdisc) { 399 if (tcinfo->is_qdisc) {
400 /* skip clsact qdisc */ 400 /* skip clsact qdisc */
401 if (tb[TCA_KIND] && 401 if (tb[TCA_KIND] &&
402 strcmp(libbpf_nla_data(tb[ 402 strcmp(libbpf_nla_data(tb[TCA_KIND]), "clsact") == 0)
403 return 0; 403 return 0;
404 if (info->tcm_handle == 0) 404 if (info->tcm_handle == 0)
405 return 0; 405 return 0;
406 } 406 }
407 407
408 if (tcinfo->used_len == tcinfo->array_ 408 if (tcinfo->used_len == tcinfo->array_len) {
409 tcinfo->handle_array = realloc 409 tcinfo->handle_array = realloc(tcinfo->handle_array,
410 (tcinfo->array_len + 1 410 (tcinfo->array_len + 16) * sizeof(struct tc_kind_handle));
411 if (!tcinfo->handle_array) 411 if (!tcinfo->handle_array)
412 return -ENOMEM; 412 return -ENOMEM;
413 413
414 tcinfo->array_len += 16; 414 tcinfo->array_len += 16;
415 } 415 }
416 tcinfo->handle_array[tcinfo->used_len] 416 tcinfo->handle_array[tcinfo->used_len].handle = info->tcm_handle;
417 snprintf(tcinfo->handle_array[tcinfo-> 417 snprintf(tcinfo->handle_array[tcinfo->used_len].kind,
418 sizeof(tcinfo->handle_array[t 418 sizeof(tcinfo->handle_array[tcinfo->used_len].kind),
419 "%s", 419 "%s",
420 tb[TCA_KIND] 420 tb[TCA_KIND]
421 ? libbpf_nla_getattr_ 421 ? libbpf_nla_getattr_str(tb[TCA_KIND])
422 : "unknown"); 422 : "unknown");
423 tcinfo->used_len++; 423 tcinfo->used_len++;
424 424
425 return 0; 425 return 0;
426 } 426 }
427 427
428 static int dump_filter_nlmsg(void *cookie, voi 428 static int dump_filter_nlmsg(void *cookie, void *msg, struct nlattr **tb)
429 { 429 {
430 const struct bpf_filter_t *filter_info 430 const struct bpf_filter_t *filter_info = cookie;
431 431
432 return do_filter_dump((struct tcmsg *) 432 return do_filter_dump((struct tcmsg *)msg, tb, filter_info->kind,
433 filter_info->dev 433 filter_info->devname, filter_info->ifindex);
434 } 434 }
435 435
436 static int __show_dev_tc_bpf_name(__u32 id, ch 436 static int __show_dev_tc_bpf_name(__u32 id, char *name, size_t len)
437 { 437 {
438 struct bpf_prog_info info = {}; 438 struct bpf_prog_info info = {};
439 __u32 ilen = sizeof(info); 439 __u32 ilen = sizeof(info);
440 int fd, ret; 440 int fd, ret;
441 441
442 fd = bpf_prog_get_fd_by_id(id); 442 fd = bpf_prog_get_fd_by_id(id);
443 if (fd < 0) 443 if (fd < 0)
444 return fd; 444 return fd;
445 ret = bpf_obj_get_info_by_fd(fd, &info 445 ret = bpf_obj_get_info_by_fd(fd, &info, &ilen);
446 if (ret < 0) 446 if (ret < 0)
447 goto out; 447 goto out;
448 ret = -ENOENT; 448 ret = -ENOENT;
449 if (info.name[0]) { 449 if (info.name[0]) {
450 get_prog_full_name(&info, fd, 450 get_prog_full_name(&info, fd, name, len);
451 ret = 0; 451 ret = 0;
452 } 452 }
453 out: 453 out:
454 close(fd); 454 close(fd);
455 return ret; 455 return ret;
456 } 456 }
457 457
458 static void __show_dev_tc_bpf(const struct ip_ 458 static void __show_dev_tc_bpf(const struct ip_devname_ifindex *dev,
459 const enum bpf_a 459 const enum bpf_attach_type loc)
460 { 460 {
461 __u32 prog_flags[64] = {}, link_flags[ 461 __u32 prog_flags[64] = {}, link_flags[64] = {}, i, j;
462 __u32 prog_ids[64] = {}, link_ids[64] 462 __u32 prog_ids[64] = {}, link_ids[64] = {};
463 LIBBPF_OPTS(bpf_prog_query_opts, optq) 463 LIBBPF_OPTS(bpf_prog_query_opts, optq);
464 char prog_name[MAX_PROG_FULL_NAME]; 464 char prog_name[MAX_PROG_FULL_NAME];
465 int ret; 465 int ret;
466 466
467 optq.prog_ids = prog_ids; 467 optq.prog_ids = prog_ids;
468 optq.prog_attach_flags = prog_flags; 468 optq.prog_attach_flags = prog_flags;
469 optq.link_ids = link_ids; 469 optq.link_ids = link_ids;
470 optq.link_attach_flags = link_flags; 470 optq.link_attach_flags = link_flags;
471 optq.count = ARRAY_SIZE(prog_ids); 471 optq.count = ARRAY_SIZE(prog_ids);
472 472
473 ret = bpf_prog_query_opts(dev->ifindex 473 ret = bpf_prog_query_opts(dev->ifindex, loc, &optq);
474 if (ret) 474 if (ret)
475 return; 475 return;
476 for (i = 0; i < optq.count; i++) { 476 for (i = 0; i < optq.count; i++) {
477 NET_START_OBJECT; 477 NET_START_OBJECT;
478 NET_DUMP_STR("devname", "%s", 478 NET_DUMP_STR("devname", "%s", dev->devname);
479 NET_DUMP_UINT("ifindex", "(%u) 479 NET_DUMP_UINT("ifindex", "(%u)", dev->ifindex);
480 NET_DUMP_STR("kind", " %s", at 480 NET_DUMP_STR("kind", " %s", attach_loc_strings[loc]);
481 ret = __show_dev_tc_bpf_name(p 481 ret = __show_dev_tc_bpf_name(prog_ids[i], prog_name,
482 s 482 sizeof(prog_name));
483 if (!ret) 483 if (!ret)
484 NET_DUMP_STR("name", " 484 NET_DUMP_STR("name", " %s", prog_name);
485 NET_DUMP_UINT("prog_id", " pro 485 NET_DUMP_UINT("prog_id", " prog_id %u ", prog_ids[i]);
486 if (prog_flags[i] || json_outp 486 if (prog_flags[i] || json_output) {
487 NET_START_ARRAY("prog_ 487 NET_START_ARRAY("prog_flags", "%s ");
488 for (j = 0; prog_flags 488 for (j = 0; prog_flags[i] && j < 32; j++) {
489 if (!(prog_fla 489 if (!(prog_flags[i] & (1U << j)))
490 contin 490 continue;
491 NET_DUMP_UINT_ 491 NET_DUMP_UINT_ONLY(1U << j);
492 } 492 }
493 NET_END_ARRAY(""); 493 NET_END_ARRAY("");
494 } 494 }
495 if (link_ids[i] || json_output 495 if (link_ids[i] || json_output) {
496 NET_DUMP_UINT("link_id 496 NET_DUMP_UINT("link_id", "link_id %u ", link_ids[i]);
497 if (link_flags[i] || j 497 if (link_flags[i] || json_output) {
498 NET_START_ARRA 498 NET_START_ARRAY("link_flags", "%s ");
499 for (j = 0; li 499 for (j = 0; link_flags[i] && j < 32; j++) {
500 if (!( 500 if (!(link_flags[i] & (1U << j)))
501 501 continue;
502 NET_DU 502 NET_DUMP_UINT_ONLY(1U << j);
503 } 503 }
504 NET_END_ARRAY( 504 NET_END_ARRAY("");
505 } 505 }
506 } 506 }
507 NET_END_OBJECT_FINAL; 507 NET_END_OBJECT_FINAL;
508 } 508 }
509 } 509 }
510 510
511 static void show_dev_tc_bpf(struct ip_devname_ 511 static void show_dev_tc_bpf(struct ip_devname_ifindex *dev)
512 { 512 {
513 __show_dev_tc_bpf(dev, BPF_TCX_INGRESS 513 __show_dev_tc_bpf(dev, BPF_TCX_INGRESS);
514 __show_dev_tc_bpf(dev, BPF_TCX_EGRESS) 514 __show_dev_tc_bpf(dev, BPF_TCX_EGRESS);
515 515
516 __show_dev_tc_bpf(dev, BPF_NETKIT_PRIM 516 __show_dev_tc_bpf(dev, BPF_NETKIT_PRIMARY);
517 __show_dev_tc_bpf(dev, BPF_NETKIT_PEER 517 __show_dev_tc_bpf(dev, BPF_NETKIT_PEER);
518 } 518 }
519 519
520 static int show_dev_tc_bpf_classic(int sock, u 520 static int show_dev_tc_bpf_classic(int sock, unsigned int nl_pid,
521 struct ip_d 521 struct ip_devname_ifindex *dev)
522 { 522 {
523 struct bpf_filter_t filter_info; 523 struct bpf_filter_t filter_info;
524 struct bpf_tcinfo_t tcinfo; 524 struct bpf_tcinfo_t tcinfo;
525 int i, handle, ret = 0; 525 int i, handle, ret = 0;
526 526
527 tcinfo.handle_array = NULL; 527 tcinfo.handle_array = NULL;
528 tcinfo.used_len = 0; 528 tcinfo.used_len = 0;
529 tcinfo.array_len = 0; 529 tcinfo.array_len = 0;
530 530
531 tcinfo.is_qdisc = false; 531 tcinfo.is_qdisc = false;
532 ret = netlink_get_class(sock, nl_pid, 532 ret = netlink_get_class(sock, nl_pid, dev->ifindex,
533 dump_class_qdi 533 dump_class_qdisc_nlmsg, &tcinfo);
534 if (ret) 534 if (ret)
535 goto out; 535 goto out;
536 536
537 tcinfo.is_qdisc = true; 537 tcinfo.is_qdisc = true;
538 ret = netlink_get_qdisc(sock, nl_pid, 538 ret = netlink_get_qdisc(sock, nl_pid, dev->ifindex,
539 dump_class_qdi 539 dump_class_qdisc_nlmsg, &tcinfo);
540 if (ret) 540 if (ret)
541 goto out; 541 goto out;
542 542
543 filter_info.devname = dev->devname; 543 filter_info.devname = dev->devname;
544 filter_info.ifindex = dev->ifindex; 544 filter_info.ifindex = dev->ifindex;
545 for (i = 0; i < tcinfo.used_len; i++) 545 for (i = 0; i < tcinfo.used_len; i++) {
546 filter_info.kind = tcinfo.hand 546 filter_info.kind = tcinfo.handle_array[i].kind;
547 ret = netlink_get_filter(sock, 547 ret = netlink_get_filter(sock, nl_pid, dev->ifindex,
548 tcinf 548 tcinfo.handle_array[i].handle,
549 dump_ 549 dump_filter_nlmsg, &filter_info);
550 if (ret) 550 if (ret)
551 goto out; 551 goto out;
552 } 552 }
553 553
554 /* root, ingress and egress handle */ 554 /* root, ingress and egress handle */
555 handle = TC_H_ROOT; 555 handle = TC_H_ROOT;
556 filter_info.kind = "root"; 556 filter_info.kind = "root";
557 ret = netlink_get_filter(sock, nl_pid, 557 ret = netlink_get_filter(sock, nl_pid, dev->ifindex, handle,
558 dump_filter_n 558 dump_filter_nlmsg, &filter_info);
559 if (ret) 559 if (ret)
560 goto out; 560 goto out;
561 561
562 handle = TC_H_MAKE(TC_H_CLSACT, TC_H_M 562 handle = TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_INGRESS);
563 filter_info.kind = "clsact/ingress"; 563 filter_info.kind = "clsact/ingress";
564 ret = netlink_get_filter(sock, nl_pid, 564 ret = netlink_get_filter(sock, nl_pid, dev->ifindex, handle,
565 dump_filter_n 565 dump_filter_nlmsg, &filter_info);
566 if (ret) 566 if (ret)
567 goto out; 567 goto out;
568 568
569 handle = TC_H_MAKE(TC_H_CLSACT, TC_H_M 569 handle = TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_EGRESS);
570 filter_info.kind = "clsact/egress"; 570 filter_info.kind = "clsact/egress";
571 ret = netlink_get_filter(sock, nl_pid, 571 ret = netlink_get_filter(sock, nl_pid, dev->ifindex, handle,
572 dump_filter_n 572 dump_filter_nlmsg, &filter_info);
573 if (ret) 573 if (ret)
574 goto out; 574 goto out;
575 575
576 out: 576 out:
577 free(tcinfo.handle_array); 577 free(tcinfo.handle_array);
578 return 0; 578 return 0;
579 } 579 }
580 580
581 static int query_flow_dissector(struct bpf_att 581 static int query_flow_dissector(struct bpf_attach_info *attach_info)
582 { 582 {
583 __u32 attach_flags; 583 __u32 attach_flags;
584 __u32 prog_ids[1]; 584 __u32 prog_ids[1];
585 __u32 prog_cnt; 585 __u32 prog_cnt;
586 int err; 586 int err;
587 int fd; 587 int fd;
588 588
589 fd = open("/proc/self/ns/net", O_RDONL 589 fd = open("/proc/self/ns/net", O_RDONLY);
590 if (fd < 0) { 590 if (fd < 0) {
591 p_err("can't open /proc/self/n 591 p_err("can't open /proc/self/ns/net: %s",
592 strerror(errno)); 592 strerror(errno));
593 return -1; 593 return -1;
594 } 594 }
595 prog_cnt = ARRAY_SIZE(prog_ids); 595 prog_cnt = ARRAY_SIZE(prog_ids);
596 err = bpf_prog_query(fd, BPF_FLOW_DISS 596 err = bpf_prog_query(fd, BPF_FLOW_DISSECTOR, 0,
597 &attach_flags, pr 597 &attach_flags, prog_ids, &prog_cnt);
598 close(fd); 598 close(fd);
599 if (err) { 599 if (err) {
600 if (errno == EINVAL) { 600 if (errno == EINVAL) {
601 /* Older kernel's don' 601 /* Older kernel's don't support querying
602 * flow dissector prog 602 * flow dissector programs.
603 */ 603 */
604 errno = 0; 604 errno = 0;
605 return 0; 605 return 0;
606 } 606 }
607 p_err("can't query prog: %s", 607 p_err("can't query prog: %s", strerror(errno));
608 return -1; 608 return -1;
609 } 609 }
610 610
611 if (prog_cnt == 1) 611 if (prog_cnt == 1)
612 attach_info->flow_dissector_id 612 attach_info->flow_dissector_id = prog_ids[0];
613 613
614 return 0; 614 return 0;
615 } 615 }
616 616
617 static int net_parse_dev(int *argc, char ***ar 617 static int net_parse_dev(int *argc, char ***argv)
618 { 618 {
619 int ifindex; 619 int ifindex;
620 620
621 if (is_prefix(**argv, "dev")) { 621 if (is_prefix(**argv, "dev")) {
622 NEXT_ARGP(); 622 NEXT_ARGP();
623 623
624 ifindex = if_nametoindex(**arg 624 ifindex = if_nametoindex(**argv);
625 if (!ifindex) 625 if (!ifindex)
626 p_err("invalid devname 626 p_err("invalid devname %s", **argv);
627 627
628 NEXT_ARGP(); 628 NEXT_ARGP();
629 } else { 629 } else {
630 p_err("expected 'dev', got: '% 630 p_err("expected 'dev', got: '%s'?", **argv);
631 return -1; 631 return -1;
632 } 632 }
633 633
634 return ifindex; 634 return ifindex;
635 } 635 }
636 636
637 static int do_attach_detach_xdp(int progfd, en 637 static int do_attach_detach_xdp(int progfd, enum net_attach_type attach_type,
638 int ifindex, b 638 int ifindex, bool overwrite)
639 { 639 {
640 __u32 flags = 0; 640 __u32 flags = 0;
641 641
642 if (!overwrite) 642 if (!overwrite)
643 flags = XDP_FLAGS_UPDATE_IF_NO 643 flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
644 if (attach_type == NET_ATTACH_TYPE_XDP 644 if (attach_type == NET_ATTACH_TYPE_XDP_GENERIC)
645 flags |= XDP_FLAGS_SKB_MODE; 645 flags |= XDP_FLAGS_SKB_MODE;
646 if (attach_type == NET_ATTACH_TYPE_XDP 646 if (attach_type == NET_ATTACH_TYPE_XDP_DRIVER)
647 flags |= XDP_FLAGS_DRV_MODE; 647 flags |= XDP_FLAGS_DRV_MODE;
648 if (attach_type == NET_ATTACH_TYPE_XDP 648 if (attach_type == NET_ATTACH_TYPE_XDP_OFFLOAD)
649 flags |= XDP_FLAGS_HW_MODE; 649 flags |= XDP_FLAGS_HW_MODE;
650 650
651 return bpf_xdp_attach(ifindex, progfd, 651 return bpf_xdp_attach(ifindex, progfd, flags, NULL);
652 } 652 }
653 653
654 static int get_tcx_type(enum net_attach_type a 654 static int get_tcx_type(enum net_attach_type attach_type)
655 { 655 {
656 switch (attach_type) { 656 switch (attach_type) {
657 case NET_ATTACH_TYPE_TCX_INGRESS: 657 case NET_ATTACH_TYPE_TCX_INGRESS:
658 return BPF_TCX_INGRESS; 658 return BPF_TCX_INGRESS;
659 case NET_ATTACH_TYPE_TCX_EGRESS: 659 case NET_ATTACH_TYPE_TCX_EGRESS:
660 return BPF_TCX_EGRESS; 660 return BPF_TCX_EGRESS;
661 default: 661 default:
662 return -1; 662 return -1;
663 } 663 }
664 } 664 }
665 665
666 static int do_attach_tcx(int progfd, enum net_ 666 static int do_attach_tcx(int progfd, enum net_attach_type attach_type, int ifindex)
667 { 667 {
668 int type = get_tcx_type(attach_type); 668 int type = get_tcx_type(attach_type);
669 669
670 return bpf_prog_attach(progfd, ifindex 670 return bpf_prog_attach(progfd, ifindex, type, 0);
671 } 671 }
672 672
673 static int do_detach_tcx(int targetfd, enum ne 673 static int do_detach_tcx(int targetfd, enum net_attach_type attach_type)
674 { 674 {
675 int type = get_tcx_type(attach_type); 675 int type = get_tcx_type(attach_type);
676 676
677 return bpf_prog_detach(targetfd, type) 677 return bpf_prog_detach(targetfd, type);
678 } 678 }
679 679
680 static int do_attach(int argc, char **argv) 680 static int do_attach(int argc, char **argv)
681 { 681 {
682 enum net_attach_type attach_type; 682 enum net_attach_type attach_type;
683 int progfd, ifindex, err = 0; 683 int progfd, ifindex, err = 0;
684 bool overwrite = false; 684 bool overwrite = false;
685 685
686 /* parse attach args */ 686 /* parse attach args */
687 if (!REQ_ARGS(5)) 687 if (!REQ_ARGS(5))
688 return -EINVAL; 688 return -EINVAL;
689 689
690 attach_type = parse_attach_type(*argv) 690 attach_type = parse_attach_type(*argv);
691 if (attach_type == net_attach_type_siz 691 if (attach_type == net_attach_type_size) {
692 p_err("invalid net attach/deta 692 p_err("invalid net attach/detach type: %s", *argv);
693 return -EINVAL; 693 return -EINVAL;
694 } 694 }
695 NEXT_ARG(); 695 NEXT_ARG();
696 696
697 progfd = prog_parse_fd(&argc, &argv); 697 progfd = prog_parse_fd(&argc, &argv);
698 if (progfd < 0) 698 if (progfd < 0)
699 return -EINVAL; 699 return -EINVAL;
700 700
701 ifindex = net_parse_dev(&argc, &argv); 701 ifindex = net_parse_dev(&argc, &argv);
702 if (ifindex < 1) { 702 if (ifindex < 1) {
703 err = -EINVAL; 703 err = -EINVAL;
704 goto cleanup; 704 goto cleanup;
705 } 705 }
706 706
707 if (argc) { 707 if (argc) {
708 if (is_prefix(*argv, "overwrit 708 if (is_prefix(*argv, "overwrite")) {
709 overwrite = true; 709 overwrite = true;
710 } else { 710 } else {
711 p_err("expected 'overw 711 p_err("expected 'overwrite', got: '%s'?", *argv);
712 err = -EINVAL; 712 err = -EINVAL;
713 goto cleanup; 713 goto cleanup;
714 } 714 }
715 } 715 }
716 716
717 switch (attach_type) { 717 switch (attach_type) {
718 /* attach xdp prog */ 718 /* attach xdp prog */
719 case NET_ATTACH_TYPE_XDP: 719 case NET_ATTACH_TYPE_XDP:
720 case NET_ATTACH_TYPE_XDP_GENERIC: 720 case NET_ATTACH_TYPE_XDP_GENERIC:
721 case NET_ATTACH_TYPE_XDP_DRIVER: 721 case NET_ATTACH_TYPE_XDP_DRIVER:
722 case NET_ATTACH_TYPE_XDP_OFFLOAD: 722 case NET_ATTACH_TYPE_XDP_OFFLOAD:
723 err = do_attach_detach_xdp(pro 723 err = do_attach_detach_xdp(progfd, attach_type, ifindex, overwrite);
724 break; 724 break;
725 /* attach tcx prog */ 725 /* attach tcx prog */
726 case NET_ATTACH_TYPE_TCX_INGRESS: 726 case NET_ATTACH_TYPE_TCX_INGRESS:
727 case NET_ATTACH_TYPE_TCX_EGRESS: 727 case NET_ATTACH_TYPE_TCX_EGRESS:
728 err = do_attach_tcx(progfd, at 728 err = do_attach_tcx(progfd, attach_type, ifindex);
729 break; 729 break;
730 default: 730 default:
731 break; 731 break;
732 } 732 }
733 733
734 if (err) { 734 if (err) {
735 p_err("interface %s attach fai 735 p_err("interface %s attach failed: %s",
736 attach_type_strings[atta 736 attach_type_strings[attach_type], strerror(-err));
737 goto cleanup; 737 goto cleanup;
738 } 738 }
739 739
740 if (json_output) 740 if (json_output)
741 jsonw_null(json_wtr); 741 jsonw_null(json_wtr);
742 cleanup: 742 cleanup:
743 close(progfd); 743 close(progfd);
744 return err; 744 return err;
745 } 745 }
746 746
747 static int do_detach(int argc, char **argv) 747 static int do_detach(int argc, char **argv)
748 { 748 {
749 enum net_attach_type attach_type; 749 enum net_attach_type attach_type;
750 int progfd, ifindex, err = 0; 750 int progfd, ifindex, err = 0;
751 751
752 /* parse detach args */ 752 /* parse detach args */
753 if (!REQ_ARGS(3)) 753 if (!REQ_ARGS(3))
754 return -EINVAL; 754 return -EINVAL;
755 755
756 attach_type = parse_attach_type(*argv) 756 attach_type = parse_attach_type(*argv);
757 if (attach_type == net_attach_type_siz 757 if (attach_type == net_attach_type_size) {
758 p_err("invalid net attach/deta 758 p_err("invalid net attach/detach type: %s", *argv);
759 return -EINVAL; 759 return -EINVAL;
760 } 760 }
761 NEXT_ARG(); 761 NEXT_ARG();
762 762
763 ifindex = net_parse_dev(&argc, &argv); 763 ifindex = net_parse_dev(&argc, &argv);
764 if (ifindex < 1) 764 if (ifindex < 1)
765 return -EINVAL; 765 return -EINVAL;
766 766
767 switch (attach_type) { 767 switch (attach_type) {
768 /* detach xdp prog */ 768 /* detach xdp prog */
769 case NET_ATTACH_TYPE_XDP: 769 case NET_ATTACH_TYPE_XDP:
770 case NET_ATTACH_TYPE_XDP_GENERIC: 770 case NET_ATTACH_TYPE_XDP_GENERIC:
771 case NET_ATTACH_TYPE_XDP_DRIVER: 771 case NET_ATTACH_TYPE_XDP_DRIVER:
772 case NET_ATTACH_TYPE_XDP_OFFLOAD: 772 case NET_ATTACH_TYPE_XDP_OFFLOAD:
773 progfd = -1; 773 progfd = -1;
774 err = do_attach_detach_xdp(pro 774 err = do_attach_detach_xdp(progfd, attach_type, ifindex, NULL);
775 break; 775 break;
776 /* detach tcx prog */ 776 /* detach tcx prog */
777 case NET_ATTACH_TYPE_TCX_INGRESS: 777 case NET_ATTACH_TYPE_TCX_INGRESS:
778 case NET_ATTACH_TYPE_TCX_EGRESS: 778 case NET_ATTACH_TYPE_TCX_EGRESS:
779 err = do_detach_tcx(ifindex, a 779 err = do_detach_tcx(ifindex, attach_type);
780 break; 780 break;
781 default: 781 default:
782 break; 782 break;
783 } 783 }
784 784
785 if (err < 0) { 785 if (err < 0) {
786 p_err("interface %s detach fai 786 p_err("interface %s detach failed: %s",
787 attach_type_strings[atta 787 attach_type_strings[attach_type], strerror(-err));
788 return err; 788 return err;
789 } 789 }
790 790
791 if (json_output) 791 if (json_output)
792 jsonw_null(json_wtr); 792 jsonw_null(json_wtr);
793 793
794 return 0; 794 return 0;
795 } 795 }
796 796
797 static int netfilter_link_compar(const void *a 797 static int netfilter_link_compar(const void *a, const void *b)
798 { 798 {
799 const struct bpf_link_info *nfa = a; 799 const struct bpf_link_info *nfa = a;
800 const struct bpf_link_info *nfb = b; 800 const struct bpf_link_info *nfb = b;
801 int delta; 801 int delta;
802 802
803 delta = nfa->netfilter.pf - nfb->netfi 803 delta = nfa->netfilter.pf - nfb->netfilter.pf;
804 if (delta) 804 if (delta)
805 return delta; 805 return delta;
806 806
807 delta = nfa->netfilter.hooknum - nfb-> 807 delta = nfa->netfilter.hooknum - nfb->netfilter.hooknum;
808 if (delta) 808 if (delta)
809 return delta; 809 return delta;
810 810
811 if (nfa->netfilter.priority < nfb->net 811 if (nfa->netfilter.priority < nfb->netfilter.priority)
812 return -1; 812 return -1;
813 if (nfa->netfilter.priority > nfb->net 813 if (nfa->netfilter.priority > nfb->netfilter.priority)
814 return 1; 814 return 1;
815 815
816 return nfa->netfilter.flags - nfb->net 816 return nfa->netfilter.flags - nfb->netfilter.flags;
817 } 817 }
818 818
819 static void show_link_netfilter(void) 819 static void show_link_netfilter(void)
820 { 820 {
821 unsigned int nf_link_len = 0, nf_link_ 821 unsigned int nf_link_len = 0, nf_link_count = 0;
822 struct bpf_link_info *nf_link_info = N 822 struct bpf_link_info *nf_link_info = NULL;
823 __u32 id = 0; 823 __u32 id = 0;
824 824
825 while (true) { 825 while (true) {
826 struct bpf_link_info info; 826 struct bpf_link_info info;
827 int fd, err; 827 int fd, err;
828 __u32 len; 828 __u32 len;
829 829
830 err = bpf_link_get_next_id(id, 830 err = bpf_link_get_next_id(id, &id);
831 if (err) { 831 if (err) {
832 if (errno == ENOENT) 832 if (errno == ENOENT)
833 break; 833 break;
834 p_err("can't get next 834 p_err("can't get next link: %s (id %d)", strerror(errno), id);
835 break; 835 break;
836 } 836 }
837 837
838 fd = bpf_link_get_fd_by_id(id) 838 fd = bpf_link_get_fd_by_id(id);
839 if (fd < 0) { 839 if (fd < 0) {
840 p_err("can't get link 840 p_err("can't get link by id (%u): %s", id, strerror(errno));
841 continue; 841 continue;
842 } 842 }
843 843
844 memset(&info, 0, sizeof(info)) 844 memset(&info, 0, sizeof(info));
845 len = sizeof(info); 845 len = sizeof(info);
846 846
847 err = bpf_link_get_info_by_fd( 847 err = bpf_link_get_info_by_fd(fd, &info, &len);
848 848
849 close(fd); 849 close(fd);
850 850
851 if (err) { 851 if (err) {
852 p_err("can't get link 852 p_err("can't get link info for fd %d: %s", fd, strerror(errno));
853 continue; 853 continue;
854 } 854 }
855 855
856 if (info.type != BPF_LINK_TYPE 856 if (info.type != BPF_LINK_TYPE_NETFILTER)
857 continue; 857 continue;
858 858
859 if (nf_link_count >= nf_link_l 859 if (nf_link_count >= nf_link_len) {
860 static const unsigned 860 static const unsigned int max_link_count = INT_MAX / sizeof(info);
861 struct bpf_link_info * 861 struct bpf_link_info *expand;
862 862
863 if (nf_link_count > ma 863 if (nf_link_count > max_link_count) {
864 p_err("cannot 864 p_err("cannot handle more than %u links\n", max_link_count);
865 break; 865 break;
866 } 866 }
867 867
868 nf_link_len += 16; 868 nf_link_len += 16;
869 869
870 expand = realloc(nf_li 870 expand = realloc(nf_link_info, nf_link_len * sizeof(info));
871 if (!expand) { 871 if (!expand) {
872 p_err("realloc 872 p_err("realloc: %s", strerror(errno));
873 break; 873 break;
874 } 874 }
875 875
876 nf_link_info = expand; 876 nf_link_info = expand;
877 } 877 }
878 878
879 nf_link_info[nf_link_count] = 879 nf_link_info[nf_link_count] = info;
880 nf_link_count++; 880 nf_link_count++;
881 } 881 }
882 882
883 if (!nf_link_info) 883 if (!nf_link_info)
884 return; 884 return;
885 885
886 qsort(nf_link_info, nf_link_count, siz 886 qsort(nf_link_info, nf_link_count, sizeof(*nf_link_info), netfilter_link_compar);
887 887
888 for (id = 0; id < nf_link_count; id++) 888 for (id = 0; id < nf_link_count; id++) {
889 NET_START_OBJECT; 889 NET_START_OBJECT;
890 if (json_output) 890 if (json_output)
891 netfilter_dump_json(&n 891 netfilter_dump_json(&nf_link_info[id], json_wtr);
892 else 892 else
893 netfilter_dump_plain(& 893 netfilter_dump_plain(&nf_link_info[id]);
894 894
895 NET_DUMP_UINT("id", " prog_id 895 NET_DUMP_UINT("id", " prog_id %u", nf_link_info[id].prog_id);
896 NET_END_OBJECT; 896 NET_END_OBJECT;
897 } 897 }
898 898
899 free(nf_link_info); 899 free(nf_link_info);
900 } 900 }
901 901
902 static int do_show(int argc, char **argv) 902 static int do_show(int argc, char **argv)
903 { 903 {
904 struct bpf_attach_info attach_info = { 904 struct bpf_attach_info attach_info = {};
905 int i, sock, ret, filter_idx = -1; 905 int i, sock, ret, filter_idx = -1;
906 struct bpf_netdev_t dev_array; 906 struct bpf_netdev_t dev_array;
907 unsigned int nl_pid = 0; 907 unsigned int nl_pid = 0;
908 char err_buf[256]; 908 char err_buf[256];
909 909
910 if (argc == 2) { 910 if (argc == 2) {
911 filter_idx = net_parse_dev(&ar 911 filter_idx = net_parse_dev(&argc, &argv);
912 if (filter_idx < 1) 912 if (filter_idx < 1)
913 return -1; 913 return -1;
914 } else if (argc != 0) { 914 } else if (argc != 0) {
915 usage(); 915 usage();
916 } 916 }
917 917
918 ret = query_flow_dissector(&attach_inf 918 ret = query_flow_dissector(&attach_info);
919 if (ret) 919 if (ret)
920 return -1; 920 return -1;
921 921
922 sock = netlink_open(&nl_pid); 922 sock = netlink_open(&nl_pid);
923 if (sock < 0) { 923 if (sock < 0) {
924 fprintf(stderr, "failed to ope 924 fprintf(stderr, "failed to open netlink sock\n");
925 return -1; 925 return -1;
926 } 926 }
927 927
928 dev_array.devices = NULL; 928 dev_array.devices = NULL;
929 dev_array.used_len = 0; 929 dev_array.used_len = 0;
930 dev_array.array_len = 0; 930 dev_array.array_len = 0;
931 dev_array.filter_idx = filter_idx; 931 dev_array.filter_idx = filter_idx;
932 932
933 if (json_output) 933 if (json_output)
934 jsonw_start_array(json_wtr); 934 jsonw_start_array(json_wtr);
935 NET_START_OBJECT; 935 NET_START_OBJECT;
936 NET_START_ARRAY("xdp", "%s:\n"); 936 NET_START_ARRAY("xdp", "%s:\n");
937 ret = netlink_get_link(sock, nl_pid, d 937 ret = netlink_get_link(sock, nl_pid, dump_link_nlmsg, &dev_array);
938 NET_END_ARRAY("\n"); 938 NET_END_ARRAY("\n");
939 939
940 if (!ret) { 940 if (!ret) {
941 NET_START_ARRAY("tc", "%s:\n") 941 NET_START_ARRAY("tc", "%s:\n");
942 for (i = 0; i < dev_array.used 942 for (i = 0; i < dev_array.used_len; i++) {
943 show_dev_tc_bpf(&dev_a 943 show_dev_tc_bpf(&dev_array.devices[i]);
944 ret = show_dev_tc_bpf_ 944 ret = show_dev_tc_bpf_classic(sock, nl_pid,
945 945 &dev_array.devices[i]);
946 if (ret) 946 if (ret)
947 break; 947 break;
948 } 948 }
949 NET_END_ARRAY("\n"); 949 NET_END_ARRAY("\n");
950 } 950 }
951 951
952 NET_START_ARRAY("flow_dissector", "%s: 952 NET_START_ARRAY("flow_dissector", "%s:\n");
953 if (attach_info.flow_dissector_id > 0) 953 if (attach_info.flow_dissector_id > 0)
954 NET_DUMP_UINT("id", "id %u", a 954 NET_DUMP_UINT("id", "id %u", attach_info.flow_dissector_id);
955 NET_END_ARRAY("\n"); 955 NET_END_ARRAY("\n");
956 956
957 NET_START_ARRAY("netfilter", "%s:\n"); 957 NET_START_ARRAY("netfilter", "%s:\n");
958 show_link_netfilter(); 958 show_link_netfilter();
959 NET_END_ARRAY("\n"); 959 NET_END_ARRAY("\n");
960 960
961 NET_END_OBJECT; 961 NET_END_OBJECT;
962 if (json_output) 962 if (json_output)
963 jsonw_end_array(json_wtr); 963 jsonw_end_array(json_wtr);
964 964
965 if (ret) { 965 if (ret) {
966 if (json_output) 966 if (json_output)
967 jsonw_null(json_wtr); 967 jsonw_null(json_wtr);
968 libbpf_strerror(ret, err_buf, 968 libbpf_strerror(ret, err_buf, sizeof(err_buf));
969 fprintf(stderr, "Error: %s\n", 969 fprintf(stderr, "Error: %s\n", err_buf);
970 } 970 }
971 free(dev_array.devices); 971 free(dev_array.devices);
972 close(sock); 972 close(sock);
973 return ret; 973 return ret;
974 } 974 }
975 975
976 static int do_help(int argc, char **argv) 976 static int do_help(int argc, char **argv)
977 { 977 {
978 if (json_output) { 978 if (json_output) {
979 jsonw_null(json_wtr); 979 jsonw_null(json_wtr);
980 return 0; 980 return 0;
981 } 981 }
982 982
983 fprintf(stderr, 983 fprintf(stderr,
984 "Usage: %1$s %2$s { show | lis 984 "Usage: %1$s %2$s { show | list } [dev <devname>]\n"
985 " %1$s %2$s attach ATTAC 985 " %1$s %2$s attach ATTACH_TYPE PROG dev <devname> [ overwrite ]\n"
986 " %1$s %2$s detach ATTAC 986 " %1$s %2$s detach ATTACH_TYPE dev <devname>\n"
987 " %1$s %2$s help\n" 987 " %1$s %2$s help\n"
988 "\n" 988 "\n"
989 " " HELP_SPEC_PROGRAM "\ 989 " " HELP_SPEC_PROGRAM "\n"
990 " ATTACH_TYPE := { xdp | 990 " ATTACH_TYPE := { xdp | xdpgeneric | xdpdrv | xdpoffload | tcx_ingress\n"
991 " | tcx 991 " | tcx_egress }\n"
992 " " HELP_SPEC_OPTIONS " 992 " " HELP_SPEC_OPTIONS " }\n"
993 "\n" 993 "\n"
994 "Note: Only xdp, tcx, tc, netk 994 "Note: Only xdp, tcx, tc, netkit, flow_dissector and netfilter attachments\n"
995 " are currently supported 995 " are currently supported.\n"
996 " For progs attached to c 996 " For progs attached to cgroups, use \"bpftool cgroup\"\n"
997 " to dump program attachm 997 " to dump program attachments. For program types\n"
998 " sk_{filter,skb,msg,reus 998 " sk_{filter,skb,msg,reuseport} and lwt/seg6, please\n"
999 " consult iproute2.\n" 999 " consult iproute2.\n"
1000 "", 1000 "",
1001 bin_name, argv[-2]); 1001 bin_name, argv[-2]);
1002 1002
1003 return 0; 1003 return 0;
1004 } 1004 }
1005 1005
1006 static const struct cmd cmds[] = { 1006 static const struct cmd cmds[] = {
1007 { "show", do_show }, 1007 { "show", do_show },
1008 { "list", do_show }, 1008 { "list", do_show },
1009 { "attach", do_attach }, 1009 { "attach", do_attach },
1010 { "detach", do_detach }, 1010 { "detach", do_detach },
1011 { "help", do_help }, 1011 { "help", do_help },
1012 { 0 } 1012 { 0 }
1013 }; 1013 };
1014 1014
1015 int do_net(int argc, char **argv) 1015 int do_net(int argc, char **argv)
1016 { 1016 {
1017 return cmd_select(cmds, argc, argv, d 1017 return cmd_select(cmds, argc, argv, do_help);
1018 } 1018 }
1019 1019
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