Messages in this thread | | | Date | Tue, 12 Jul 2022 06:02:11 +0800 | From | kernel test robot <> | Subject | [jolsa-perf:bpf/tramp_29 26/32] kernel/bpf/syscall.c:3137:15: 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/tramp_29 head: ec522c20e55e48f561146afbb81513e20870ee12 commit: 75c50c5a148820bf4b1fafa3fb834bbfaeccc6c2 [26/32] bpf: Add support for tracing multi link config: x86_64-randconfig-a001 (https://download.01.org/0day-ci/archive/20220712/202207120523.yVSHsCLv-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project badda4ac3c489a8c8cccdad1f74b9308c350a9e0) 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=75c50c5a148820bf4b1fafa3fb834bbfaeccc6c2 git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git git fetch --no-tags jolsa-perf bpf/tramp_29 git checkout 75c50c5a148820bf4b1fafa3fb834bbfaeccc6c2 # 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=x86_64 SHELL=/bin/bash
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:2503:15: 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:3137:15: 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:3145:2: 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:3145:2: note: did you mean 'bpf_trampoline_put'? include/linux/bpf.h:1013:20: note: 'bpf_trampoline_put' declared here static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} ^ >> kernel/bpf/syscall.c:3308:7: 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:3308:5: warning: 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:3349:8: 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:3349:8: note: did you mean 'bpf_tracing_multi_attach'? kernel/bpf/syscall.c:3293:12: note: 'bpf_tracing_multi_attach' declared here static int bpf_tracing_multi_attach(struct bpf_prog *prog, ^ kernel/bpf/syscall.c:4821:12: 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)) ^ 1 warning and 6 errors generated.
vim +/bpf_trampoline_multi_detach +3137 kernel/bpf/syscall.c
3131 3132 static void bpf_tracing_multi_link_release(struct bpf_link *link) 3133 { 3134 struct bpf_tracing_multi_link *tr_link = 3135 container_of(link, struct bpf_tracing_multi_link, link); 3136 > 3137 WARN_ON_ONCE(bpf_trampoline_multi_detach(&tr_link->tp, tr_link->id)); 3138 } 3139 3140 static void bpf_tracing_multi_link_dealloc(struct bpf_link *link) 3141 { 3142 struct bpf_tracing_multi_link *tr_link = 3143 container_of(link, struct bpf_tracing_multi_link, link); 3144 3145 bpf_tramp_id_put(tr_link->id); 3146 kfree(tr_link); 3147 } 3148 3149 static void bpf_tracing_multi_link_show_fdinfo(const struct bpf_link *link, 3150 struct seq_file *seq) 3151 { 3152 struct bpf_tracing_multi_link *tr_link = 3153 container_of(link, struct bpf_tracing_multi_link, link); 3154 3155 seq_printf(seq, "attach_type:\t%d\n", tr_link->attach_type); 3156 } 3157 3158 static int bpf_tracing_multi_link_fill_link_info(const struct bpf_link *link, 3159 struct bpf_link_info *info) 3160 { 3161 struct bpf_tracing_multi_link *tr_link = 3162 container_of(link, struct bpf_tracing_multi_link, link); 3163 3164 info->tracing.attach_type = tr_link->attach_type; 3165 return 0; 3166 } 3167 3168 static const struct bpf_link_ops bpf_tracing_multi_link_lops = { 3169 .release = bpf_tracing_multi_link_release, 3170 .dealloc = bpf_tracing_multi_link_dealloc, 3171 .show_fdinfo = bpf_tracing_multi_link_show_fdinfo, 3172 .fill_link_info = bpf_tracing_multi_link_fill_link_info, 3173 }; 3174 3175 static int check_multi_prog_type(struct bpf_prog *prog) 3176 { 3177 if (prog->expected_attach_type != BPF_TRACE_FENTRY_MULTI && 3178 prog->expected_attach_type != BPF_TRACE_FEXIT_MULTI) 3179 return -EINVAL; 3180 return 0; 3181 } 3182 3183 static int btf_ids_cmp(const void *a, const void *b) 3184 { 3185 const u32 *x = a; 3186 const u32 *y = b; 3187 3188 if (*x == *y) 3189 return 0; 3190 return *x < *y ? -1 : 1; 3191 } 3192 3193 struct resolve_id { 3194 const char *name; 3195 void *addr; 3196 u32 id; 3197 }; 3198 3199 static int rid_name_cmp(const void *a, const void *b) 3200 { 3201 const struct resolve_id *x = a; 3202 const struct resolve_id *y = b; 3203 3204 return strcmp(x->name, y->name); 3205 } 3206 3207 static int rid_id_cmp(const void *a, const void *b) 3208 { 3209 const struct resolve_id *x = a; 3210 const struct resolve_id *y = b; 3211 3212 if (x->id == y->id) 3213 return 0; 3214 return x->id < y->id ? -1 : 1; 3215 } 3216 3217 struct kallsyms_data { 3218 struct resolve_id *rid; 3219 u32 cnt; 3220 u32 found; 3221 }; 3222 3223 static int kallsyms_callback(void *data, const char *name, 3224 struct module *mod, unsigned long addr) 3225 { 3226 struct kallsyms_data *args = data; 3227 struct resolve_id *rid, id = { 3228 .name = name, 3229 }; 3230 3231 rid = bsearch(&id, args->rid, args->cnt, sizeof(*rid), rid_name_cmp); 3232 if (rid && !rid->addr) { 3233 rid->addr = (void *) addr; 3234 args->found++; 3235 } 3236 return args->found == args->cnt ? 1 : 0; 3237 } 3238 3239 static int bpf_tramp_id_resolve(struct bpf_tramp_id *id, struct bpf_prog *prog) 3240 { 3241 struct kallsyms_data args; 3242 const struct btf_type *t; 3243 struct resolve_id *rid; 3244 const char *name; 3245 struct btf *btf; 3246 int err = 0; 3247 u32 i; 3248 3249 btf = prog->aux->attach_btf; 3250 if (!btf) 3251 return -EINVAL; 3252 3253 rid = kzalloc(id->cnt * sizeof(*rid), GFP_KERNEL); 3254 if (!rid) 3255 return -ENOMEM; 3256 3257 err = -EINVAL; 3258 for (i = 0; i < id->cnt; i++) { 3259 t = btf_type_by_id(btf, id->id[i]); 3260 if (!t) 3261 goto out_free; 3262 3263 name = btf_name_by_offset(btf, t->name_off); 3264 if (!name) 3265 goto out_free; 3266 3267 rid[i].name = name; 3268 rid[i].id = id->id[i]; 3269 } 3270 3271 sort(rid, id->cnt, sizeof(*rid), rid_name_cmp, NULL); 3272 3273 args.rid = rid; 3274 args.cnt = id->cnt; 3275 args.found = 0; 3276 kallsyms_on_each_symbol(kallsyms_callback, &args); 3277 3278 sort(rid, id->cnt, sizeof(*rid), rid_id_cmp, NULL); 3279 3280 for (i = 0; i < id->cnt; i++) { 3281 if (!rid[i].addr) { 3282 err = -EINVAL; 3283 goto out_free; 3284 } 3285 id->addr[i] = rid[i].addr; 3286 } 3287 err = 0; 3288 out_free: 3289 kfree(rid); 3290 return err; 3291 } 3292 3293 static int bpf_tracing_multi_attach(struct bpf_prog *prog, 3294 const union bpf_attr *attr) 3295 { 3296 void __user *uids = u64_to_user_ptr(attr->link_create.tracing_multi.btf_ids); 3297 u32 cnt_size, cnt = attr->link_create.tracing_multi.btf_ids_cnt; 3298 struct bpf_tracing_multi_link *link = NULL; 3299 struct bpf_link_primer link_primer; 3300 struct bpf_tramp_id *id = NULL; 3301 int err = -EINVAL; 3302 3303 if (check_multi_prog_type(prog)) 3304 return -EINVAL; 3305 if (!cnt || !uids) 3306 return -EINVAL; 3307 > 3308 id = bpf_tramp_id_alloc(cnt); 3309 if (!id) 3310 return -ENOMEM; 3311 3312 err = -EFAULT; 3313 cnt_size = cnt * sizeof(id->id[0]); 3314 if (copy_from_user(id->id, uids, cnt_size)) 3315 goto out_free_id; 3316 3317 id->cnt = cnt; 3318 id->obj_id = btf_obj_id(prog->aux->attach_btf); 3319 3320 /* Sort user provided BTF ids, so we can use memcmp 3321 * and bsearch on top of it later. 3322 */ 3323 sort(id->id, cnt, sizeof(u32), btf_ids_cmp, NULL); 3324 3325 err = bpf_tramp_id_resolve(id, prog); 3326 if (err) 3327 goto out_free_id; 3328 3329 link = kzalloc(sizeof(*link), GFP_KERNEL); 3330 if (!link) { 3331 err = -ENOMEM; 3332 goto out_free_id; 3333 } 3334 3335 bpf_link_init(&link->link, BPF_LINK_TYPE_TRACING_MULTI, 3336 &bpf_tracing_multi_link_lops, prog); 3337 link->attach_type = prog->expected_attach_type; 3338 3339 err = bpf_link_prime(&link->link, &link_primer); 3340 if (err) { 3341 kfree(link); 3342 goto out_free_id; 3343 } 3344 3345 link->id = id; 3346 link->tp.cookie = 0; 3347 link->tp.prog = prog; 3348 3349 err = bpf_trampoline_multi_attach(&link->tp, id); 3350 if (err) { 3351 bpf_link_cleanup(&link_primer); 3352 goto out_free_id; 3353 } 3354 return bpf_link_settle(&link_primer); 3355 out_free_id: 3356 kfree(id); 3357 return err; 3358 } 3359
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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