tree: https://github.com/congwang/linux.git sch_bpf head: aa61f170d88b706060a1977b7b7bef9d08e33ff1 commit: aa61f170d88b706060a1977b7b7bef9d08e33ff1 [2/2] sch_bpf: draft config: hexagon-buildonly-randconfig-r001-20210812 (attached as .config) compiler: clang version 12.0.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/congwang/linux/commit/aa61f170d88b706060a1977b7b7bef9d... git remote add congwang https://github.com/congwang/linux.git git fetch --no-tags congwang sch_bpf git checkout aa61f170d88b706060a1977b7b7bef9d08e33ff1 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=hexagon SHELL=/bin/bash net/sched/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): enqueue = rcu_dereference(q->enqueue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:9: note: expanded from macro '__rcu_dereference_check' typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ ^~ enqueue = rcu_dereference(q->enqueue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:35: note: expanded from macro '__rcu_dereference_check' typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ ^~ enqueue = rcu_dereference(q->enqueue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:392:11: note: expanded from macro '__rcu_dereference_check' ((typeof(*p) __force __kernel *)(________p1)); \ ^~ enqueue = rcu_dereference(q->enqueue_prog); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:219:12: error: indirection requires pointer operand ('struct sch_bpf_prog' invalid) dequeue = rcu_dereference(q->dequeue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:9: note: expanded from macro '__rcu_dereference_check' typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ ^~ net/sched/sch_bpf.c:219:12: error: indirection requires pointer operand ('struct sch_bpf_prog' invalid) dequeue = rcu_dereference(q->dequeue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:35: note: expanded from macro '__rcu_dereference_check' typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ ^~ net/sched/sch_bpf.c:219:12: error: indirection requires pointer operand ('struct sch_bpf_prog' invalid) dequeue = rcu_dereference(q->dequeue_prog); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: expanded from macro 'rcu_dereference' #define rcu_dereference(p) rcu_dereference_check(p, 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:528:2: note: expanded from macro 'rcu_dereference_check' __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:392:11: note: expanded from macro '__rcu_dereference_check' ((typeof(*p) __force __kernel *)(________p1)); \ ^~ net/sched/sch_bpf.c:219:10: error: assigning to 'struct bpf_prog *' from incompatible type 'void' dequeue = rcu_dereference(q->dequeue_prog); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ bpf_compute_data_pointers(skb); ^ ctx.skb = pq_pop(&cl->pq); ^ ~~~~~~~~~~~~~~~ if (res == SCH_BPF_RET_OK) { ^ } else if (res == SCH_BPF_RET_REQUEUE) { ^ return (unsigned long)sch_bpf_find(handle, sch); ^~~~~~ net/sched/sch_bpf.c:115:57: note: passing argument to parameter 'sch' here static struct sch_bpf_class *sch_bpf_find(struct Qdisc *sch, u32 classid) ^ return (unsigned long)sch_bpf_find(handle, sch); ^~~ net/sched/sch_bpf.c:115:66: note: passing argument to parameter 'classid' here static struct sch_bpf_class *sch_bpf_find(struct Qdisc *sch, u32 classid) ^ [TCA_SCH_BPF_ENQUEUE_PROG_FD] = { .type = NLA_U32 }, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ TCA_SCH_BPF_ENQUEUE_PROG_ID include/uapi/linux/pkt_sched.h:1269:2: note: 'TCA_SCH_BPF_ENQUEUE_PROG_ID' declared here TCA_SCH_BPF_ENQUEUE_PROG_ID, /* u32 */ ^ [TCA_SCH_BPF_DEQUEUE_PROG_FD] = { .type = NLA_U32 }, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ TCA_SCH_BPF_DEQUEUE_PROG_ID include/uapi/linux/pkt_sched.h:1272:2: note: 'TCA_SCH_BPF_DEQUEUE_PROG_ID' declared here TCA_SCH_BPF_DEQUEUE_PROG_ID, /* u32 */ ^ fp = bpf_prog_get_type(bpf_fd, BPF_PROG_TYPE_SCHED_SCH); ^~~~~~~~~~~~~~~~~~~~~~~ BPF_PROG_TYPE_SCHED_ACT include/uapi/linux/bpf.h:924:2: note: 'BPF_PROG_TYPE_SCHED_ACT' declared here BPF_PROG_TYPE_SCHED_ACT, ^ net/sched/sch_bpf.c:353:26: error: use of undeclared identifier 'TCA_SCH_BPF_ENQUEUE_PROG_FD'; did you mean 'TCA_SCH_BPF_ENQUEUE_PROG_ID'? err = bpf_init_prog(opt[TCA_SCH_BPF_ENQUEUE_PROG_FD], ^~~~~~~~~~~~~~~~~~~~~~~~~~~ TCA_SCH_BPF_ENQUEUE_PROG_ID include/uapi/linux/pkt_sched.h:1269:2: note: 'TCA_SCH_BPF_ENQUEUE_PROG_ID' declared here TCA_SCH_BPF_ENQUEUE_PROG_ID, /* u32 */ ^ err = bpf_init_prog(opt[TCA_SCH_BPF_ENQUEUE_PROG_FD], ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ & net/sched/sch_bpf.c:306:41: note: passing argument to parameter 'fd' here static int bpf_init_prog(struct nlattr *fd, struct nlattr *name, struct sch_bpf_prog *prog) ^ net/sched/sch_bpf.c:357:26: error: use of undeclared identifier 'TCA_SCH_BPF_DEQUEUE_PROG_FD'; did you mean 'TCA_SCH_BPF_DEQUEUE_PROG_ID'? err = bpf_init_prog(opt[TCA_SCH_BPF_DEQUEUE_PROG_FD], ^~~~~~~~~~~~~~~~~~~~~~~~~~~ TCA_SCH_BPF_DEQUEUE_PROG_ID include/uapi/linux/pkt_sched.h:1272:2: note: 'TCA_SCH_BPF_DEQUEUE_PROG_ID' declared here TCA_SCH_BPF_DEQUEUE_PROG_ID, /* u32 */ ^ net/sched/sch_bpf.c:357:22: error: passing 'struct nlattr' to parameter of incompatible type 'struct nlattr *'; take the address with & err = bpf_init_prog(opt[TCA_SCH_BPF_DEQUEUE_PROG_FD], ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ & net/sched/sch_bpf.c:306:41: note: passing argument to parameter 'fd' here static int bpf_init_prog(struct nlattr *fd, struct nlattr *name, struct sch_bpf_prog *prog) ^ fatal error: too many errors emitted, stopping now [-ferror-limit=] 2 warnings and 20 errors generated. vim +174 net/sched/sch_bpf.c 160 161 static int sch_bpf_enqueue(struct sk_buff *skb, struct Qdisc *sch, 162 struct sk_buff **to_free) 163 { 164 struct sch_bpf_qdisc *q = qdisc_priv(sch); 165 unsigned int len = qdisc_pkt_len(skb); 166 struct sch_bpf_ctx ctx = {}; 167 struct sch_bpf_class *cl; 168 int res; 169 170 cl = sch_bpf_classify(skb, sch, &res); 171 if (!cl) { 172 struct bpf_prog *enqueue; 173 175 bpf_compute_data_pointers(skb); 176 177 ctx.skb = skb; 178 ctx.nr_classes = q->clhash.hashelems; 179 ctx.nr_packets = sch->q.qlen; 180 res = BPF_PROG_RUN(enqueue, &ctx); 181 cl = sch_bpf_find(sch, ctx.classid); 182 if (!cl) { 183 if (res & __NET_XMIT_BYPASS) 184 qdisc_qstats_drop(sch); 185 __qdisc_drop(skb, to_free); 186 return res; 187 } 188 } 189 190 if (cl->qdisc) { 191 if ((res = qdisc_enqueue(skb, cl->qdisc, 192 to_free)) != NET_XMIT_SUCCESS) { 193 if (net_xmit_drop_count(ret)) { 194 qdisc_qstats_drop(sch); 195 cl->drops++; 196 } 197 return res; 198 } 199 } else { 200 sch_bpf_skb_cb(skb)->rank = ctx.rank; 201 pq_push(&cl->pq, &skb->pqnode); 202 } 203 204 sch->qstats.backlog += len; 205 sch->q.qlen++; 206 return res; 207 } 208 209 static struct sk_buff *sch_bpf_dequeue(struct Qdisc *sch) 210 { 211 struct sch_bpf_qdisc *q = qdisc_priv(sch); 212 struct sch_bpf_ctx ctx = {}; 213 struct sk_buff *ret = NULL; 214 struct bpf_prog *dequeue; 215 struct sch_bpf_class *cl; 216 struct pq_node *flow; 217 int res; 218 219 dequeue = rcu_dereference(q->dequeue_prog); 221 222 flow = pq_pop(&q->flows); 223 if (!flow) 224 return NULL; 225 226 cl = container_of(flow, struct sch_bpf_class, node); 227 if (cl->qdisc) { 228 ctx.skb = cl->qdisc->dequeue(cl->qdisc); 229 ctx.classid = cl->common.classid; 230 } else { 232 ctx.classid = cl->rank; 233 } 234 ctx.nr_classes = q->clhash.hashelems; 235 ctx.nr_packets = sch->q.qlen; 236 res = BPF_PROG_RUN(dequeue, &ctx); 238 ret = ctx.skb; 240 sch_bpf_skb_cb(ctx.skb)->rank = ctx.rank; 241 pq_push(&cl->pq, &ctx.skb->pqnode); 242 ret = NULL; 243 } else { 244 kfree_skb(ctx.skb); 245 ret = NULL; 246 } 247 248 cl->rank = ctx.classid; 249 if (pq_top(&cl->pq)) { 250 pq_push(&q->flows, &cl->node); 251 } 252 return ret; 253 } 254 255 static struct Qdisc *sch_bpf_leaf(struct Qdisc *sch, unsigned long arg) 256 { 257 struct sch_bpf_class *cl = (struct sch_bpf_class *)arg; 258 259 return cl->qdisc; 260 } 261 262 static int sch_bpf_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, 263 struct Qdisc **old, struct netlink_ext_ack *extack) 264 { 265 struct sch_bpf_class *cl = (struct sch_bpf_class *)arg; 266 267 if (new) 268 *old = qdisc_replace(sch, new, &cl->qdisc); 269 return 0; 270 } 271 272 static unsigned long sch_bpf_bind(struct Qdisc *sch, unsigned long parent, 273 u32 classid) 274 { 275 return 0; 276 } 277 278 static void sch_bpf_unbind(struct Qdisc *q, unsigned long cl) 279 { 280 } 281 282 static unsigned long sch_bpf_search(struct Qdisc *sch, u32 handle) 283 { 285 } 286 287 static struct tcf_block *sch_bpf_tcf_block(struct Qdisc *sch, unsigned long cl, 288 struct netlink_ext_ack *extack) 289 { 290 struct sch_bpf_qdisc *q = qdisc_priv(sch); 291 292 if (cl) 293 return NULL; 294 return q->block; 295 } 296 297 static const struct nla_policy sch_bpf_policy[TCA_SCH_BPF_MAX + 1] = { 299 [TCA_SCH_BPF_ENQUEUE_PROG_NAME] = { .type = NLA_NUL_STRING, 300 .len = ACT_BPF_NAME_LEN }, 302 [TCA_SCH_BPF_DEQUEUE_PROG_NAME] = { .type = NLA_NUL_STRING, 303 .len = ACT_BPF_NAME_LEN }, 304 }; 305 306 static int bpf_init_prog(struct nlattr *fd, struct nlattr *name, struct sch_bpf_prog *prog) 307 { 308 char *prog_name = NULL; 309 struct bpf_prog *fp; 310 u32 bpf_fd; 311 312 bpf_fd = nla_get_u32(fd); 313 315 if (IS_ERR(fp)) 316 return PTR_ERR(fp); 317 318 if (name) { 319 prog_name = nla_memdup(name, GFP_KERNEL); 320 if (!prog_name) { 321 bpf_prog_put(fp); 322 return -ENOMEM; 323 } 324 } 325 326 prog->name = prog_name; 327 prog->prog = fp; 328 return 0; 329 } 330 331 static bpf_cleanup_prog(struct sch_bpf_prog *prog) 332 { 333 if (prog->prog) 334 bpf_prog_put(prog->prog); 335 kfree(prog->name); 336 } 337 338 static int sch_bpf_change(struct Qdisc *sch, struct nlattr *opt, 339 struct netlink_ext_ack *extack) 340 { 341 struct sch_bpf_qdisc *q = qdisc_priv(sch); 342 struct nlattr *tb[TCA_SCH_BPF_MAX + 1]; 343 u32 gen_flags = 0; 344 int err; 345 346 if (!opt) 347 return -EINVAL; 348 349 err = nla_parse_nested_deprecated(tb, TCA_SCH_BPF_MAX, opt, 350 sch_bpf_policy, NULL); 351 if (err < 0) 352 return err; 354 opt[TCA_SCH_BPF_ENQUEUE_PROG_NAME], &q->enqueue_prog); 355 if (err) 356 return err; 357 err = bpf_init_prog(opt[TCA_SCH_BPF_DEQUEUE_PROG_FD], 358 opt[TCA_SCH_BPF_DEQUEUE_PROG_NAME], &q->dequeue_prog); 359 return err; 360 } 361 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org