Messages in this thread | | | Date | Thu, 28 Jul 2022 13:19:56 +0800 | From | kernel test robot <> | Subject | [jolsa-perf:bpf/tracing_multi_4 24/34] kernel/bpf/syscall.c:3157:15: error: call to undeclared function 'bpf_trampoline_multi_detach'; ISO C99 and later do not support implicit function declarations |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_4 head: 1637b6b5bec11596e52cdc0a6eadfa45a15276c3 commit: ddb4a6defabce7658e7c6be7397bd5e714279b48 [24/34] bpf: Add support for tracing multi link config: hexagon-randconfig-r041-20220728 (https://download.01.org/0day-ci/archive/20220728/202207281330.rTwELUls-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 8dfaecc4c24494337933aff9d9166486ca0949f1) 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://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=ddb4a6defabce7658e7c6be7397bd5e714279b48 git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git git fetch --no-tags jolsa-perf bpf/tracing_multi_4 git checkout ddb4a6defabce7658e7c6be7397bd5e714279b48 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/bpf/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
kernel/bpf/syscall.c:2523:15: error: call to undeclared function 'is_tracing_multi'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] multi_func = is_tracing_multi(attr->expected_attach_type); ^ >> kernel/bpf/syscall.c:3157:15: error: call to undeclared function 'bpf_trampoline_multi_detach'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] WARN_ON_ONCE(bpf_trampoline_multi_detach(&tr_link->tp, tr_link->id)); ^ >> kernel/bpf/syscall.c:3165:2: error: call to undeclared function 'bpf_tramp_id_put'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] bpf_tramp_id_put(tr_link->id); ^ kernel/bpf/syscall.c:3165:2: note: did you mean 'bpf_trampoline_put'? include/linux/bpf.h:1021:20: note: 'bpf_trampoline_put' declared here static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} ^ >> kernel/bpf/syscall.c:3328:7: error: call to undeclared function 'bpf_tramp_id_alloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] id = bpf_tramp_id_alloc(cnt); ^ >> kernel/bpf/syscall.c:3328:5: error: incompatible integer to pointer conversion assigning to 'struct bpf_tramp_id *' from 'int' [-Wint-conversion] id = bpf_tramp_id_alloc(cnt); ^ ~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/bpf/syscall.c:3369:8: error: call to undeclared function 'bpf_trampoline_multi_attach'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] err = bpf_trampoline_multi_attach(&link->tp, id); ^ kernel/bpf/syscall.c:3369:8: note: did you mean 'bpf_tracing_multi_attach'? kernel/bpf/syscall.c:3313:12: note: 'bpf_tracing_multi_attach' declared here static int bpf_tracing_multi_attach(struct bpf_prog *prog, ^ kernel/bpf/syscall.c:4841:12: error: call to undeclared function 'is_tracing_multi'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] else if (is_tracing_multi(prog->expected_attach_type)) ^ 7 errors generated.
vim +/bpf_trampoline_multi_detach +3157 kernel/bpf/syscall.c
3151 3152 static void bpf_tracing_multi_link_release(struct bpf_link *link) 3153 { 3154 struct bpf_tracing_multi_link *tr_link = 3155 container_of(link, struct bpf_tracing_multi_link, link); 3156 > 3157 WARN_ON_ONCE(bpf_trampoline_multi_detach(&tr_link->tp, tr_link->id)); 3158 } 3159 3160 static void bpf_tracing_multi_link_dealloc(struct bpf_link *link) 3161 { 3162 struct bpf_tracing_multi_link *tr_link = 3163 container_of(link, struct bpf_tracing_multi_link, link); 3164 > 3165 bpf_tramp_id_put(tr_link->id); 3166 kfree(tr_link); 3167 } 3168 3169 static void bpf_tracing_multi_link_show_fdinfo(const struct bpf_link *link, 3170 struct seq_file *seq) 3171 { 3172 struct bpf_tracing_multi_link *tr_link = 3173 container_of(link, struct bpf_tracing_multi_link, link); 3174 3175 seq_printf(seq, "attach_type:\t%d\n", tr_link->attach_type); 3176 } 3177 3178 static int bpf_tracing_multi_link_fill_link_info(const struct bpf_link *link, 3179 struct bpf_link_info *info) 3180 { 3181 struct bpf_tracing_multi_link *tr_link = 3182 container_of(link, struct bpf_tracing_multi_link, link); 3183 3184 info->tracing.attach_type = tr_link->attach_type; 3185 return 0; 3186 } 3187 3188 static const struct bpf_link_ops bpf_tracing_multi_link_lops = { 3189 .release = bpf_tracing_multi_link_release, 3190 .dealloc = bpf_tracing_multi_link_dealloc, 3191 .show_fdinfo = bpf_tracing_multi_link_show_fdinfo, 3192 .fill_link_info = bpf_tracing_multi_link_fill_link_info, 3193 }; 3194 3195 static int check_multi_prog_type(struct bpf_prog *prog) 3196 { 3197 if (prog->expected_attach_type != BPF_TRACE_FENTRY_MULTI && 3198 prog->expected_attach_type != BPF_TRACE_FEXIT_MULTI) 3199 return -EINVAL; 3200 return 0; 3201 } 3202 3203 static int btf_ids_cmp(const void *a, const void *b) 3204 { 3205 const u32 *x = a; 3206 const u32 *y = b; 3207 3208 if (*x == *y) 3209 return 0; 3210 return *x < *y ? -1 : 1; 3211 } 3212 3213 struct resolve_id { 3214 const char *name; 3215 void *addr; 3216 u32 id; 3217 }; 3218 3219 static int rid_name_cmp(const void *a, const void *b) 3220 { 3221 const struct resolve_id *x = a; 3222 const struct resolve_id *y = b; 3223 3224 return strcmp(x->name, y->name); 3225 } 3226 3227 static int rid_id_cmp(const void *a, const void *b) 3228 { 3229 const struct resolve_id *x = a; 3230 const struct resolve_id *y = b; 3231 3232 if (x->id == y->id) 3233 return 0; 3234 return x->id < y->id ? -1 : 1; 3235 } 3236 3237 struct kallsyms_data { 3238 struct resolve_id *rid; 3239 u32 cnt; 3240 u32 found; 3241 }; 3242 3243 static int kallsyms_callback(void *data, const char *name, 3244 struct module *mod, unsigned long addr) 3245 { 3246 struct kallsyms_data *args = data; 3247 struct resolve_id *rid, id = { 3248 .name = name, 3249 }; 3250 3251 rid = bsearch(&id, args->rid, args->cnt, sizeof(*rid), rid_name_cmp); 3252 if (rid && !rid->addr) { 3253 rid->addr = (void *) addr; 3254 args->found++; 3255 } 3256 return args->found == args->cnt ? 1 : 0; 3257 } 3258 3259 static int bpf_tramp_id_resolve(struct bpf_tramp_id *id, struct bpf_prog *prog) 3260 { 3261 struct kallsyms_data args; 3262 const struct btf_type *t; 3263 struct resolve_id *rid; 3264 const char *name; 3265 struct btf *btf; 3266 int err = 0; 3267 u32 i; 3268 3269 btf = prog->aux->attach_btf; 3270 if (!btf) 3271 return -EINVAL; 3272 3273 rid = kzalloc(id->cnt * sizeof(*rid), GFP_KERNEL); 3274 if (!rid) 3275 return -ENOMEM; 3276 3277 err = -EINVAL; 3278 for (i = 0; i < id->cnt; i++) { 3279 t = btf_type_by_id(btf, id->id[i]); 3280 if (!t) 3281 goto out_free; 3282 3283 name = btf_name_by_offset(btf, t->name_off); 3284 if (!name) 3285 goto out_free; 3286 3287 rid[i].name = name; 3288 rid[i].id = id->id[i]; 3289 } 3290 3291 sort(rid, id->cnt, sizeof(*rid), rid_name_cmp, NULL); 3292 3293 args.rid = rid; 3294 args.cnt = id->cnt; 3295 args.found = 0; 3296 kallsyms_on_each_symbol(kallsyms_callback, &args); 3297 3298 sort(rid, id->cnt, sizeof(*rid), rid_id_cmp, NULL); 3299 3300 for (i = 0; i < id->cnt; i++) { 3301 if (!rid[i].addr) { 3302 err = -EINVAL; 3303 goto out_free; 3304 } 3305 id->addr[i] = rid[i].addr; 3306 } 3307 err = 0; 3308 out_free: 3309 kfree(rid); 3310 return err; 3311 } 3312 3313 static int bpf_tracing_multi_attach(struct bpf_prog *prog, 3314 const union bpf_attr *attr) 3315 { 3316 void __user *uids = u64_to_user_ptr(attr->link_create.tracing_multi.btf_ids); 3317 u32 cnt_size, cnt = attr->link_create.tracing_multi.btf_ids_cnt; 3318 struct bpf_tracing_multi_link *link = NULL; 3319 struct bpf_link_primer link_primer; 3320 struct bpf_tramp_id *id = NULL; 3321 int err = -EINVAL; 3322 3323 if (check_multi_prog_type(prog)) 3324 return -EINVAL; 3325 if (!cnt || !uids) 3326 return -EINVAL; 3327 > 3328 id = bpf_tramp_id_alloc(cnt); 3329 if (!id) 3330 return -ENOMEM; 3331 3332 err = -EFAULT; 3333 cnt_size = cnt * sizeof(id->id[0]); 3334 if (copy_from_user(id->id, uids, cnt_size)) 3335 goto out_free_id; 3336 3337 id->cnt = cnt; 3338 id->obj_id = btf_obj_id(prog->aux->attach_btf); 3339 3340 /* Sort user provided BTF ids, so we can use memcmp 3341 * and bsearch on top of it later. 3342 */ 3343 sort(id->id, cnt, sizeof(u32), btf_ids_cmp, NULL); 3344 3345 err = bpf_tramp_id_resolve(id, prog); 3346 if (err) 3347 goto out_free_id; 3348 3349 link = kzalloc(sizeof(*link), GFP_KERNEL); 3350 if (!link) { 3351 err = -ENOMEM; 3352 goto out_free_id; 3353 } 3354 3355 bpf_link_init(&link->link, BPF_LINK_TYPE_TRACING_MULTI, 3356 &bpf_tracing_multi_link_lops, prog); 3357 link->attach_type = prog->expected_attach_type; 3358 3359 err = bpf_link_prime(&link->link, &link_primer); 3360 if (err) { 3361 kfree(link); 3362 goto out_free_id; 3363 } 3364 3365 link->id = id; 3366 link->tp.cookie = 0; 3367 link->tp.prog = prog; 3368 3369 err = bpf_trampoline_multi_attach(&link->tp, id); 3370 if (err) { 3371 bpf_link_cleanup(&link_primer); 3372 goto out_free_id; 3373 } 3374 return bpf_link_settle(&link_primer); 3375 out_free_id: 3376 kfree(id); 3377 return err; 3378 } 3379
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