Lines Matching +full:enum +full:- +full:cnt +full:- +full:name
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2011-2015 PLUMgrid, http://plumgrid.com
18 #include <linux/error-injection.h>
56 static struct bpf_raw_event_map *bpf_get_raw_tracepoint_module(const char *name) in bpf_get_raw_tracepoint_module() argument
64 for (i = 0; i < btm->module->num_bpf_raw_events; ++i) { in bpf_get_raw_tracepoint_module()
65 btp = &btm->module->bpf_raw_events[i]; in bpf_get_raw_tracepoint_module()
66 if (!strcmp(btp->tp->name, name)) { in bpf_get_raw_tracepoint_module()
67 if (try_module_get(btm->module)) in bpf_get_raw_tracepoint_module()
78 static struct bpf_raw_event_map *bpf_get_raw_tracepoint_module(const char *name) in bpf_get_raw_tracepoint_module() argument
97 * trace_call_bpf - invoke BPF program
106 * 0 - return from kprobe (event is filtered out)
107 * 1 - store kprobe event into ring buffer
120 * and don't send kprobe event into ring-buffer, in trace_call_bpf()
124 bpf_prog_inc_misses_counters(rcu_dereference(call->prog_array)); in trace_call_bpf()
133 * whether call->prog_array is empty or not, which is in trace_call_bpf()
137 * non-NULL, we go into trace_call_bpf() and do the actual in trace_call_bpf()
146 ret = bpf_prog_run_array(rcu_dereference(call->prog_array), in trace_call_bpf()
209 * strncpy_from_user() does long-sized strides in the fast path. If the in bpf_probe_read_user_str_common()
333 * access_ok() should prevent writing to non-user memory, but in in BPF_CALL_3()
343 current->flags & (PF_KTHREAD | PF_EXITING))) in BPF_CALL_3()
344 return -EPERM; in BPF_CALL_3()
346 return -EPERM; in BPF_CALL_3()
427 return -EINVAL; in BPF_CALL_4()
469 return -EINVAL; in BPF_CALL_5()
480 return seq_has_overflowed(m) ? -EOVERFLOW : 0; in BPF_CALL_5()
499 return seq_write(m, data, len) ? -EOVERFLOW : 0; in BPF_CALL_3()
523 return btf_type_seq_show_flags(btf, btf_id, ptr->ptr, m, flags); in BPF_CALL_4()
547 return -EINVAL; in get_map_perf_counter()
550 if (unlikely(index >= array->map.max_entries)) in get_map_perf_counter()
551 return -E2BIG; in get_map_perf_counter()
553 ee = READ_ONCE(array->ptrs[index]); in get_map_perf_counter()
555 return -ENOENT; in get_map_perf_counter()
557 return perf_event_read_local(ee->event, value, enabled, running); in get_map_perf_counter()
567 * this api is ugly since we miss [-22..-2] range of valid in BPF_CALL_2()
586 int err = -EINVAL; in BPF_CALL_4()
590 err = get_map_perf_counter(map, flags, &buf->counter, &buf->enabled, in BPF_CALL_4()
591 &buf->running); in BPF_CALL_4()
628 if (unlikely(index >= array->map.max_entries)) in __bpf_perf_event_output()
629 return -E2BIG; in __bpf_perf_event_output()
631 ee = READ_ONCE(array->ptrs[index]); in __bpf_perf_event_output()
633 return -ENOENT; in __bpf_perf_event_output()
635 event = ee->event; in __bpf_perf_event_output()
636 if (unlikely(event->attr.type != PERF_TYPE_SOFTWARE || in __bpf_perf_event_output()
637 event->attr.config != PERF_COUNT_SW_BPF_OUTPUT)) in __bpf_perf_event_output()
638 return -EINVAL; in __bpf_perf_event_output()
640 if (unlikely(event->oncpu != cpu)) in __bpf_perf_event_output()
641 return -EOPNOTSUPP; in __bpf_perf_event_output()
675 if (WARN_ON_ONCE(nest_level > ARRAY_SIZE(sds->sds))) { in BPF_CALL_5()
676 err = -EBUSY; in BPF_CALL_5()
680 sd = &sds->sds[nest_level - 1]; in BPF_CALL_5()
683 err = -EINVAL; in BPF_CALL_5()
740 ret = -EBUSY; in bpf_event_output()
743 sd = this_cpu_ptr(&bpf_misc_sds.sds[nest_level - 1]); in bpf_event_output()
744 regs = this_cpu_ptr(&bpf_pt_regs.regs[nest_level - 1]); in bpf_event_output()
800 enum pid_type type;
813 siginfo = work->has_siginfo ? &work->info : SEND_SIG_PRIV; in do_bpf_send_signal()
815 group_send_sig_info(work->sig, siginfo, work->task, work->type); in do_bpf_send_signal()
816 put_task_struct(work->task); in do_bpf_send_signal()
819 static int bpf_send_signal_common(u32 sig, enum pid_type type, struct task_struct *task, u64 value) in bpf_send_signal_common()
844 if (unlikely(task->flags & (PF_KTHREAD | PF_EXITING))) in bpf_send_signal_common()
845 return -EPERM; in bpf_send_signal_common()
847 return -EPERM; in bpf_send_signal_common()
850 return -EPERM; in bpf_send_signal_common()
857 return -EINVAL; in bpf_send_signal_common()
860 if (irq_work_is_busy(&work->irq_work)) in bpf_send_signal_common()
861 return -EBUSY; in bpf_send_signal_common()
867 work->task = get_task_struct(task); in bpf_send_signal_common()
868 work->has_siginfo = siginfo == &info; in bpf_send_signal_common()
869 if (work->has_siginfo) in bpf_send_signal_common()
870 copy_siginfo(&work->info, &info); in bpf_send_signal_common()
871 work->sig = sig; in bpf_send_signal_common()
872 work->type = type; in bpf_send_signal_common()
873 irq_work_queue(&work->irq_work); in bpf_send_signal_common()
926 len = buf + sz - p; in BPF_CALL_3()
951 if (prog->type == BPF_PROG_TYPE_TRACING && in BTF_ID()
952 prog->expected_attach_type == BPF_TRACE_ITER) in BTF_ID()
955 if (prog->type == BPF_PROG_TYPE_LSM) in BTF_ID()
956 return bpf_lsm_is_sleepable_hook(prog->aux->attach_btf_id); in BTF_ID()
959 prog->aux->attach_btf_id); in BTF_ID()
985 return -EINVAL; in bpf_btf_printf_prepare()
988 return -EINVAL; in bpf_btf_printf_prepare()
993 return IS_ERR(*btf) ? PTR_ERR(*btf) : -EINVAL; in bpf_btf_printf_prepare()
995 if (ptr->type_id > 0) in bpf_btf_printf_prepare()
996 *btf_id = ptr->type_id; in bpf_btf_printf_prepare()
998 return -EINVAL; in bpf_btf_printf_prepare()
1003 return -ENOENT; in bpf_btf_printf_prepare()
1019 return btf_type_snprintf_show(btf, btf_id, ptr->ptr, str, str_size, in BPF_CALL_5()
1037 return ((u64 *)ctx)[-2]; in BPF_CALL_1()
1050 if (is_endbr((void *)(fentry_ip - ENDBR_INSN_SIZE))) in get_entry_ip()
1051 fentry_ip -= ENDBR_INSN_SIZE; in get_entry_ip()
1062 run_ctx = container_of(current->bpf_ctx, struct bpf_trace_run_ctx, run_ctx); in BPF_CALL_1()
1063 if (run_ctx->is_uprobe) in BPF_CALL_1()
1064 return ((struct uprobe_dispatch_data *)current->utask->vaddr)->bp_addr; in BPF_CALL_1()
1069 if (!kp || !(kp->flags & KPROBE_FLAG_ON_FUNC_ENTRY)) in BPF_CALL_1()
1072 return get_entry_ip((uintptr_t)kp->addr); in BPF_CALL_1()
1084 return bpf_kprobe_multi_entry_ip(current->bpf_ctx); in BPF_CALL_1()
1096 return bpf_kprobe_multi_cookie(current->bpf_ctx); in BPF_CALL_1()
1108 return bpf_uprobe_multi_entry_ip(current->bpf_ctx); in BPF_CALL_1()
1120 return bpf_uprobe_multi_cookie(current->bpf_ctx); in BPF_CALL_1()
1134 run_ctx = container_of(current->bpf_ctx, struct bpf_trace_run_ctx, run_ctx); in BPF_CALL_1()
1135 return run_ctx->bpf_cookie; in BPF_CALL_1()
1147 return ctx->event->bpf_cookie; in BPF_CALL_1()
1161 run_ctx = container_of(current->bpf_ctx, struct bpf_trace_run_ctx, run_ctx); in BPF_CALL_1()
1162 return run_ctx->bpf_cookie; in BPF_CALL_1()
1180 return -EINVAL; in BPF_CALL_3()
1183 return -ENOENT; in BPF_CALL_3()
1199 u64 nr_args = ((u64 *)ctx)[-1]; in BPF_CALL_3()
1202 return -EINVAL; in BPF_CALL_3()
1219 u64 nr_args = ((u64 *)ctx)[-1]; in BPF_CALL_2()
1236 return ((u64 *)ctx)[-1]; in BPF_CALL_1()
1249 * bpf_lookup_user_key - lookup a key by its serial
1251 * @flags: lookup-specific flags
1262 * one of the available key-specific kfuncs.
1295 bkey->key = key_ref_to_ptr(key_ref); in bpf_lookup_user_key()
1296 bkey->has_ref = true; in bpf_lookup_user_key()
1302 * bpf_lookup_system_key - lookup a key by a system-defined ID
1320 * pre-determined ID on success, a NULL pointer otherwise
1333 bkey->key = (struct key *)(unsigned long)id; in bpf_lookup_system_key()
1334 bkey->has_ref = false; in bpf_lookup_system_key()
1340 * bpf_key_put - decrement key reference count if key is valid and free bpf_key
1348 if (bkey->has_ref) in bpf_key_put()
1349 key_put(bkey->key); in bpf_key_put()
1356 * bpf_verify_pkcs7_signature - verify a PKCS#7 signature
1376 if (trusted_keyring->has_ref) { in bpf_verify_pkcs7_signature()
1385 ret = key_validate(trusted_keyring->key); in bpf_verify_pkcs7_signature()
1396 trusted_keyring->key, in bpf_verify_pkcs7_signature()
1428 bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in bpf_tracing_func_proto()
1518 return prog->sleepable ? &bpf_get_task_stack_sleepable_proto in bpf_tracing_func_proto()
1558 if (!bpf_token_capable(prog->aux->token, CAP_SYS_ADMIN)) in bpf_tracing_func_proto()
1572 return prog->expected_attach_type == BPF_TRACE_KPROBE_MULTI || in is_kprobe_multi()
1573 prog->expected_attach_type == BPF_TRACE_KPROBE_SESSION; in is_kprobe_multi()
1578 return prog->expected_attach_type == BPF_TRACE_KPROBE_SESSION; in is_kprobe_session()
1583 return prog->expected_attach_type == BPF_TRACE_UPROBE_MULTI || in is_uprobe_multi()
1584 prog->expected_attach_type == BPF_TRACE_UPROBE_SESSION; in is_uprobe_multi()
1589 return prog->expected_attach_type == BPF_TRACE_UPROBE_SESSION; in is_uprobe_session()
1593 kprobe_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in kprobe_prog_func_proto()
1601 return prog->sleepable ? &bpf_get_stack_sleepable_proto : &bpf_get_stack_proto; in kprobe_prog_func_proto()
1624 static bool kprobe_prog_is_valid_access(int off, int size, enum bpf_access_type type, in kprobe_prog_is_valid_access()
1719 tp_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in tp_prog_func_proto()
1735 static bool tp_prog_is_valid_access(int off, int size, enum bpf_access_type type, in tp_prog_is_valid_access()
1761 int err = -EINVAL; in BPF_CALL_3()
1765 err = perf_event_read_local(ctx->event, &buf->counter, &buf->enabled, in BPF_CALL_3()
1766 &buf->running); in BPF_CALL_3()
1788 struct perf_branch_stack *br_stack = ctx->data->br_stack; in BPF_CALL_4()
1792 return -EINVAL; in BPF_CALL_4()
1794 if (unlikely(!(ctx->data->sample_flags & PERF_SAMPLE_BRANCH_STACK))) in BPF_CALL_4()
1795 return -ENOENT; in BPF_CALL_4()
1798 return -ENOENT; in BPF_CALL_4()
1801 return br_stack->nr * br_entry_size; in BPF_CALL_4()
1804 return -EINVAL; in BPF_CALL_4()
1806 to_copy = min_t(u32, br_stack->nr * br_entry_size, size); in BPF_CALL_4()
1807 memcpy(buf, br_stack->entries, to_copy); in BPF_CALL_4()
1823 pe_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in pe_prog_func_proto()
1861 if (WARN_ON_ONCE(nest_level > ARRAY_SIZE(tp_regs->regs))) { in get_bpf_raw_tp_regs()
1863 return ERR_PTR(-EBUSY); in get_bpf_raw_tp_regs()
1866 return &tp_regs->regs[nest_level - 1]; in get_bpf_raw_tp_regs()
1958 raw_tp_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in raw_tp_prog_func_proto()
1975 tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) in tracing_prog_func_proto()
2011 return prog->expected_attach_type == BPF_TRACE_ITER ? in tracing_prog_func_proto()
2015 return prog->expected_attach_type == BPF_TRACE_ITER ? in tracing_prog_func_proto()
2019 return prog->expected_attach_type == BPF_TRACE_ITER ? in tracing_prog_func_proto()
2031 if (prog->type == BPF_PROG_TYPE_TRACING && in tracing_prog_func_proto()
2032 prog->expected_attach_type == BPF_TRACE_RAW_TP) in tracing_prog_func_proto()
2037 if (!fn && prog->expected_attach_type == BPF_TRACE_ITER) in tracing_prog_func_proto()
2044 enum bpf_access_type type, in raw_tp_prog_is_valid_access()
2052 enum bpf_access_type type, in tracing_prog_is_valid_access()
2063 return -ENOTSUPP; in bpf_prog_test_run_tracing()
2087 enum bpf_access_type type, in raw_tp_writable_prog_is_valid_access()
2094 info->reg_type = PTR_TO_TP_BUFFER; in raw_tp_writable_prog_is_valid_access()
2107 static bool pe_prog_is_valid_access(int off, int size, enum bpf_access_type type, in pe_prog_is_valid_access()
2145 static u32 pe_prog_convert_ctx_access(enum bpf_access_type type, in pe_prog_convert_ctx_access()
2152 switch (si->off) { in pe_prog_convert_ctx_access()
2155 data), si->dst_reg, si->src_reg, in pe_prog_convert_ctx_access()
2157 *insn++ = BPF_LDX_MEM(BPF_DW, si->dst_reg, si->dst_reg, in pe_prog_convert_ctx_access()
2163 data), si->dst_reg, si->src_reg, in pe_prog_convert_ctx_access()
2165 *insn++ = BPF_LDX_MEM(BPF_DW, si->dst_reg, si->dst_reg, in pe_prog_convert_ctx_access()
2171 regs), si->dst_reg, si->src_reg, in pe_prog_convert_ctx_access()
2173 *insn++ = BPF_LDX_MEM(BPF_SIZEOF(long), si->dst_reg, si->dst_reg, in pe_prog_convert_ctx_access()
2174 si->off); in pe_prog_convert_ctx_access()
2178 return insn - insn_buf; in pe_prog_convert_ctx_access()
2200 int ret = -EEXIST; in perf_event_attach_bpf_prog()
2204 * and only if they are on the opt-in list. in perf_event_attach_bpf_prog()
2206 if (prog->kprobe_override && in perf_event_attach_bpf_prog()
2207 (!trace_kprobe_on_func_entry(event->tp_event) || in perf_event_attach_bpf_prog()
2208 !trace_kprobe_error_injectable(event->tp_event))) in perf_event_attach_bpf_prog()
2209 return -EINVAL; in perf_event_attach_bpf_prog()
2213 if (event->prog) in perf_event_attach_bpf_prog()
2216 old_array = bpf_event_rcu_dereference(event->tp_event->prog_array); in perf_event_attach_bpf_prog()
2219 ret = -E2BIG; in perf_event_attach_bpf_prog()
2227 /* set the new array to event->tp_event and set event->prog */ in perf_event_attach_bpf_prog()
2228 event->prog = prog; in perf_event_attach_bpf_prog()
2229 event->bpf_cookie = bpf_cookie; in perf_event_attach_bpf_prog()
2230 rcu_assign_pointer(event->tp_event->prog_array, new_array); in perf_event_attach_bpf_prog()
2247 if (!event->prog) in perf_event_detach_bpf_prog()
2250 old_array = bpf_event_rcu_dereference(event->tp_event->prog_array); in perf_event_detach_bpf_prog()
2254 ret = bpf_prog_array_copy(old_array, event->prog, NULL, 0, &new_array); in perf_event_detach_bpf_prog()
2256 bpf_prog_array_delete_safe(old_array, event->prog); in perf_event_detach_bpf_prog()
2258 rcu_assign_pointer(event->tp_event->prog_array, new_array); in perf_event_detach_bpf_prog()
2263 prog = event->prog; in perf_event_detach_bpf_prog()
2264 event->prog = NULL; in perf_event_detach_bpf_prog()
2273 * programs and uses tasks-trace-RCU. in perf_event_detach_bpf_prog()
2290 return -EPERM; in perf_event_query_prog_array()
2291 if (event->attr.type != PERF_TYPE_TRACEPOINT) in perf_event_query_prog_array()
2292 return -EINVAL; in perf_event_query_prog_array()
2294 return -EFAULT; in perf_event_query_prog_array()
2298 return -E2BIG; in perf_event_query_prog_array()
2301 return -ENOMEM; in perf_event_query_prog_array()
2304 * is required when user only wants to check for uquery->prog_cnt. in perf_event_query_prog_array()
2310 progs = bpf_event_rcu_dereference(event->tp_event->prog_array); in perf_event_query_prog_array()
2314 if (copy_to_user(&uquery->prog_cnt, &prog_cnt, sizeof(prog_cnt)) || in perf_event_query_prog_array()
2315 copy_to_user(uquery->ids, ids, ids_len * sizeof(u32))) in perf_event_query_prog_array()
2316 ret = -EFAULT; in perf_event_query_prog_array()
2325 struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) in bpf_get_raw_tracepoint() argument
2330 if (!strcmp(btp->tp->name, name)) in bpf_get_raw_tracepoint()
2334 return bpf_get_raw_tracepoint_module(name); in bpf_get_raw_tracepoint()
2349 struct bpf_prog *prog = link->link.prog; in __bpf_trace_run()
2354 if (unlikely(this_cpu_inc_return(*(prog->active)) != 1)) { in __bpf_trace_run()
2359 run_ctx.bpf_cookie = link->cookie; in __bpf_trace_run()
2368 this_cpu_dec(*(prog->active)); in __bpf_trace_run()
2418 struct tracepoint *tp = btp->tp; in bpf_probe_register()
2419 struct bpf_prog *prog = link->link.prog; in bpf_probe_register()
2425 if (prog->aux->max_ctx_offset > btp->num_args * sizeof(u64)) in bpf_probe_register()
2426 return -EINVAL; in bpf_probe_register()
2428 if (prog->aux->max_tp_access > btp->writable_size) in bpf_probe_register()
2429 return -EINVAL; in bpf_probe_register()
2431 return tracepoint_probe_register_may_exist(tp, (void *)btp->bpf_func, link); in bpf_probe_register()
2436 return tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, link); in bpf_probe_unregister()
2448 prog = event->prog; in bpf_get_perf_event_info()
2450 return -ENOENT; in bpf_get_perf_event_info()
2453 if (prog->type == BPF_PROG_TYPE_PERF_EVENT) in bpf_get_perf_event_info()
2454 return -EOPNOTSUPP; in bpf_get_perf_event_info()
2456 *prog_id = prog->aux->id; in bpf_get_perf_event_info()
2457 flags = event->tp_event->flags; in bpf_get_perf_event_info()
2459 is_syscall_tp = is_syscall_trace_event(event->tp_event); in bpf_get_perf_event_info()
2462 *buf = is_tracepoint ? event->tp_event->tp->name in bpf_get_perf_event_info()
2463 : event->tp_event->name; in bpf_get_perf_event_info()
2473 err = -EOPNOTSUPP; in bpf_get_perf_event_info()
2478 event->attr.type == PERF_TYPE_TRACEPOINT); in bpf_get_perf_event_info()
2484 event->attr.type == PERF_TYPE_TRACEPOINT); in bpf_get_perf_event_info()
2498 init_irq_work(&work->irq_work, do_bpf_send_signal); in send_signal_irq_work_init()
2513 if (mod->num_bpf_raw_events == 0 || in bpf_event_notify()
2523 btm->module = module; in bpf_event_notify()
2524 list_add(&btm->list, &bpf_trace_modules); in bpf_event_notify()
2526 ret = -ENOMEM; in bpf_event_notify()
2531 if (btm->module == module) { in bpf_event_notify()
2532 list_del(&btm->list); in bpf_event_notify()
2571 u32 cnt; member
2602 static int copy_user_syms(struct user_syms *us, unsigned long __user *usyms, u32 cnt) in copy_user_syms() argument
2607 int err = -ENOMEM; in copy_user_syms()
2610 syms = kvmalloc_array(cnt, sizeof(*syms), GFP_KERNEL); in copy_user_syms()
2614 buf = kvmalloc_array(cnt, KSYM_NAME_LEN, GFP_KERNEL); in copy_user_syms()
2618 for (p = buf, i = 0; i < cnt; i++) { in copy_user_syms()
2620 err = -EFAULT; in copy_user_syms()
2625 err = -E2BIG; in copy_user_syms()
2632 us->syms = syms; in copy_user_syms()
2633 us->buf = buf; in copy_user_syms()
2644 static void kprobe_multi_put_modules(struct module **mods, u32 cnt) in kprobe_multi_put_modules() argument
2648 for (i = 0; i < cnt; i++) in kprobe_multi_put_modules()
2654 kvfree(us->syms); in free_user_syms()
2655 kvfree(us->buf); in free_user_syms()
2663 unregister_fprobe(&kmulti_link->fp); in bpf_kprobe_multi_link_release()
2664 kprobe_multi_put_modules(kmulti_link->mods, kmulti_link->mods_cnt); in bpf_kprobe_multi_link_release()
2672 kvfree(kmulti_link->addrs); in bpf_kprobe_multi_link_dealloc()
2673 kvfree(kmulti_link->cookies); in bpf_kprobe_multi_link_dealloc()
2674 kfree(kmulti_link->mods); in bpf_kprobe_multi_link_dealloc()
2681 u64 __user *ucookies = u64_to_user_ptr(info->kprobe_multi.cookies); in bpf_kprobe_multi_link_fill_link_info()
2682 u64 __user *uaddrs = u64_to_user_ptr(info->kprobe_multi.addrs); in bpf_kprobe_multi_link_fill_link_info()
2684 u32 ucount = info->kprobe_multi.count; in bpf_kprobe_multi_link_fill_link_info()
2688 return -EINVAL; in bpf_kprobe_multi_link_fill_link_info()
2690 return -EINVAL; in bpf_kprobe_multi_link_fill_link_info()
2693 info->kprobe_multi.count = kmulti_link->cnt; in bpf_kprobe_multi_link_fill_link_info()
2694 info->kprobe_multi.flags = kmulti_link->flags; in bpf_kprobe_multi_link_fill_link_info()
2695 info->kprobe_multi.missed = kmulti_link->fp.nmissed; in bpf_kprobe_multi_link_fill_link_info()
2699 if (ucount < kmulti_link->cnt) in bpf_kprobe_multi_link_fill_link_info()
2700 err = -ENOSPC; in bpf_kprobe_multi_link_fill_link_info()
2702 ucount = kmulti_link->cnt; in bpf_kprobe_multi_link_fill_link_info()
2705 if (kmulti_link->cookies) { in bpf_kprobe_multi_link_fill_link_info()
2706 if (copy_to_user(ucookies, kmulti_link->cookies, ucount * sizeof(u64))) in bpf_kprobe_multi_link_fill_link_info()
2707 return -EFAULT; in bpf_kprobe_multi_link_fill_link_info()
2711 return -EFAULT; in bpf_kprobe_multi_link_fill_link_info()
2717 if (copy_to_user(uaddrs, kmulti_link->addrs, ucount * sizeof(u64))) in bpf_kprobe_multi_link_fill_link_info()
2718 return -EFAULT; in bpf_kprobe_multi_link_fill_link_info()
2722 return -EFAULT; in bpf_kprobe_multi_link_fill_link_info()
2740 cookie_a = link->cookies + (addr_a - link->addrs); in bpf_kprobe_multi_cookie_swap()
2741 cookie_b = link->cookies + (addr_b - link->addrs); in bpf_kprobe_multi_cookie_swap()
2754 return *addr_a < *addr_b ? -1 : 1; in bpf_kprobe_multi_addrs_cmp()
2771 run_ctx = container_of(current->bpf_ctx, struct bpf_kprobe_multi_run_ctx, in bpf_kprobe_multi_cookie()
2773 link = run_ctx->link; in bpf_kprobe_multi_cookie()
2774 if (!link->cookies) in bpf_kprobe_multi_cookie()
2776 entry_ip = run_ctx->entry_ip; in bpf_kprobe_multi_cookie()
2777 addr = bsearch(&entry_ip, link->addrs, link->cnt, sizeof(entry_ip), in bpf_kprobe_multi_cookie()
2781 cookie = link->cookies + (addr - link->addrs); in bpf_kprobe_multi_cookie()
2789 run_ctx = container_of(current->bpf_ctx, struct bpf_kprobe_multi_run_ctx, in bpf_kprobe_multi_entry_ip()
2791 return run_ctx->entry_ip; in bpf_kprobe_multi_entry_ip()
2812 bpf_prog_inc_misses_counter(link->link.prog); in kprobe_multi_link_prog_run()
2821 err = bpf_prog_run(link->link.prog, regs); in kprobe_multi_link_prog_run()
2842 return is_kprobe_session(link->link.prog) ? err : 0; in kprobe_multi_link_handler()
2878 if (data->cookies) { in symbols_swap_r()
2881 cookie_a = data->cookies + (name_a - data->funcs); in symbols_swap_r()
2882 cookie_b = data->cookies + (name_b - data->funcs); in symbols_swap_r()
2897 if (arr->mods_cnt == arr->mods_cap) { in add_module()
2898 arr->mods_cap = max(16, arr->mods_cap * 3 / 2); in add_module()
2899 mods = krealloc_array(arr->mods, arr->mods_cap, sizeof(*mods), GFP_KERNEL); in add_module()
2901 return -ENOMEM; in add_module()
2902 arr->mods = mods; in add_module()
2905 arr->mods[arr->mods_cnt] = mod; in add_module()
2906 arr->mods_cnt++; in add_module()
2914 for (i = arr->mods_cnt - 1; i >= 0; i--) { in has_module()
2915 if (arr->mods[i] == mod) in has_module()
2938 err = -EINVAL; in get_modules_for_addrs()
2963 static int addrs_check_error_injection_list(unsigned long *addrs, u32 cnt) in addrs_check_error_injection_list() argument
2967 for (i = 0; i < cnt; i++) { in addrs_check_error_injection_list()
2969 return -EINVAL; in addrs_check_error_injection_list()
2980 u32 flags, cnt, size; in bpf_kprobe_multi_link_attach() local
2988 return -EOPNOTSUPP; in bpf_kprobe_multi_link_attach()
2991 return -EINVAL; in bpf_kprobe_multi_link_attach()
2993 flags = attr->link_create.kprobe_multi.flags; in bpf_kprobe_multi_link_attach()
2995 return -EINVAL; in bpf_kprobe_multi_link_attach()
2997 uaddrs = u64_to_user_ptr(attr->link_create.kprobe_multi.addrs); in bpf_kprobe_multi_link_attach()
2998 usyms = u64_to_user_ptr(attr->link_create.kprobe_multi.syms); in bpf_kprobe_multi_link_attach()
3000 return -EINVAL; in bpf_kprobe_multi_link_attach()
3002 cnt = attr->link_create.kprobe_multi.cnt; in bpf_kprobe_multi_link_attach()
3003 if (!cnt) in bpf_kprobe_multi_link_attach()
3004 return -EINVAL; in bpf_kprobe_multi_link_attach()
3005 if (cnt > MAX_KPROBE_MULTI_CNT) in bpf_kprobe_multi_link_attach()
3006 return -E2BIG; in bpf_kprobe_multi_link_attach()
3008 size = cnt * sizeof(*addrs); in bpf_kprobe_multi_link_attach()
3009 addrs = kvmalloc_array(cnt, sizeof(*addrs), GFP_KERNEL); in bpf_kprobe_multi_link_attach()
3011 return -ENOMEM; in bpf_kprobe_multi_link_attach()
3013 ucookies = u64_to_user_ptr(attr->link_create.kprobe_multi.cookies); in bpf_kprobe_multi_link_attach()
3015 cookies = kvmalloc_array(cnt, sizeof(*addrs), GFP_KERNEL); in bpf_kprobe_multi_link_attach()
3017 err = -ENOMEM; in bpf_kprobe_multi_link_attach()
3021 err = -EFAULT; in bpf_kprobe_multi_link_attach()
3028 err = -EFAULT; in bpf_kprobe_multi_link_attach()
3037 err = copy_user_syms(&us, usyms, cnt); in bpf_kprobe_multi_link_attach()
3044 sort_r(us.syms, cnt, sizeof(*us.syms), symbols_cmp_r, in bpf_kprobe_multi_link_attach()
3047 err = ftrace_lookup_symbols(us.syms, cnt, addrs); in bpf_kprobe_multi_link_attach()
3053 if (prog->kprobe_override && addrs_check_error_injection_list(addrs, cnt)) { in bpf_kprobe_multi_link_attach()
3054 err = -EINVAL; in bpf_kprobe_multi_link_attach()
3060 err = -ENOMEM; in bpf_kprobe_multi_link_attach()
3064 bpf_link_init(&link->link, BPF_LINK_TYPE_KPROBE_MULTI, in bpf_kprobe_multi_link_attach()
3067 err = bpf_link_prime(&link->link, &link_primer); in bpf_kprobe_multi_link_attach()
3072 link->fp.entry_handler = kprobe_multi_link_handler; in bpf_kprobe_multi_link_attach()
3074 link->fp.exit_handler = kprobe_multi_link_exit_handler; in bpf_kprobe_multi_link_attach()
3076 link->fp.entry_data_size = sizeof(u64); in bpf_kprobe_multi_link_attach()
3078 link->addrs = addrs; in bpf_kprobe_multi_link_attach()
3079 link->cookies = cookies; in bpf_kprobe_multi_link_attach()
3080 link->cnt = cnt; in bpf_kprobe_multi_link_attach()
3081 link->flags = flags; in bpf_kprobe_multi_link_attach()
3090 sort_r(addrs, cnt, sizeof(*addrs), in bpf_kprobe_multi_link_attach()
3096 err = get_modules_for_addrs(&link->mods, addrs, cnt); in bpf_kprobe_multi_link_attach()
3101 link->mods_cnt = err; in bpf_kprobe_multi_link_attach()
3103 err = register_fprobe_ips(&link->fp, addrs, cnt); in bpf_kprobe_multi_link_attach()
3105 kprobe_multi_put_modules(link->mods, link->mods_cnt); in bpf_kprobe_multi_link_attach()
3121 return -EOPNOTSUPP; in bpf_kprobe_multi_link_attach()
3149 u32 cnt; member
3161 static void bpf_uprobe_unregister(struct bpf_uprobe *uprobes, u32 cnt) in bpf_uprobe_unregister() argument
3165 for (i = 0; i < cnt; i++) in bpf_uprobe_unregister()
3168 if (cnt) in bpf_uprobe_unregister()
3177 bpf_uprobe_unregister(umulti_link->uprobes, umulti_link->cnt); in bpf_uprobe_multi_link_release()
3178 if (umulti_link->task) in bpf_uprobe_multi_link_release()
3179 put_task_struct(umulti_link->task); in bpf_uprobe_multi_link_release()
3180 path_put(&umulti_link->path); in bpf_uprobe_multi_link_release()
3188 kvfree(umulti_link->uprobes); in bpf_uprobe_multi_link_dealloc()
3195 u64 __user *uref_ctr_offsets = u64_to_user_ptr(info->uprobe_multi.ref_ctr_offsets); in bpf_uprobe_multi_link_fill_link_info()
3196 u64 __user *ucookies = u64_to_user_ptr(info->uprobe_multi.cookies); in bpf_uprobe_multi_link_fill_link_info()
3197 u64 __user *uoffsets = u64_to_user_ptr(info->uprobe_multi.offsets); in bpf_uprobe_multi_link_fill_link_info()
3198 u64 __user *upath = u64_to_user_ptr(info->uprobe_multi.path); in bpf_uprobe_multi_link_fill_link_info()
3199 u32 upath_size = info->uprobe_multi.path_size; in bpf_uprobe_multi_link_fill_link_info()
3201 u32 ucount = info->uprobe_multi.count; in bpf_uprobe_multi_link_fill_link_info()
3207 return -EINVAL; in bpf_uprobe_multi_link_fill_link_info()
3210 return -EINVAL; in bpf_uprobe_multi_link_fill_link_info()
3213 info->uprobe_multi.count = umulti_link->cnt; in bpf_uprobe_multi_link_fill_link_info()
3214 info->uprobe_multi.flags = umulti_link->flags; in bpf_uprobe_multi_link_fill_link_info()
3215 info->uprobe_multi.pid = umulti_link->task ? in bpf_uprobe_multi_link_fill_link_info()
3216 task_pid_nr_ns(umulti_link->task, task_active_pid_ns(current)) : 0; in bpf_uprobe_multi_link_fill_link_info()
3221 return -ENOMEM; in bpf_uprobe_multi_link_fill_link_info()
3222 p = d_path(&umulti_link->path, buf, upath_size); in bpf_uprobe_multi_link_fill_link_info()
3227 upath_size = buf + upath_size - p; in bpf_uprobe_multi_link_fill_link_info()
3233 return -EFAULT; in bpf_uprobe_multi_link_fill_link_info()
3234 info->uprobe_multi.path_size = upath_size; in bpf_uprobe_multi_link_fill_link_info()
3239 if (ucount < umulti_link->cnt) in bpf_uprobe_multi_link_fill_link_info()
3240 err = -ENOSPC; in bpf_uprobe_multi_link_fill_link_info()
3242 ucount = umulti_link->cnt; in bpf_uprobe_multi_link_fill_link_info()
3246 put_user(umulti_link->uprobes[i].offset, uoffsets + i)) in bpf_uprobe_multi_link_fill_link_info()
3247 return -EFAULT; in bpf_uprobe_multi_link_fill_link_info()
3249 put_user(umulti_link->uprobes[i].ref_ctr_offset, uref_ctr_offsets + i)) in bpf_uprobe_multi_link_fill_link_info()
3250 return -EFAULT; in bpf_uprobe_multi_link_fill_link_info()
3252 put_user(umulti_link->uprobes[i].cookie, ucookies + i)) in bpf_uprobe_multi_link_fill_link_info()
3253 return -EFAULT; in bpf_uprobe_multi_link_fill_link_info()
3270 struct bpf_uprobe_multi_link *link = uprobe->link; in uprobe_prog_run()
3279 struct bpf_prog *prog = link->link.prog; in uprobe_prog_run()
3280 bool sleepable = prog->sleepable; in uprobe_prog_run()
3284 if (link->task && !same_thread_group(current, link->task)) in uprobe_prog_run()
3295 err = bpf_prog_run(link->link.prog, regs); in uprobe_prog_run()
3313 return uprobe->link->task->mm == mm; in uprobe_multi_link_filter()
3325 if (uprobe->session) in uprobe_multi_link_handler()
3345 run_ctx = container_of(current->bpf_ctx, struct bpf_uprobe_multi_run_ctx, in bpf_uprobe_multi_entry_ip()
3347 return run_ctx->entry_ip; in bpf_uprobe_multi_entry_ip()
3354 run_ctx = container_of(current->bpf_ctx, struct bpf_uprobe_multi_run_ctx, in bpf_uprobe_multi_cookie()
3356 return run_ctx->uprobe->cookie; in bpf_uprobe_multi_cookie()
3369 u32 flags, cnt, i; in bpf_uprobe_multi_link_attach() local
3371 char *name; in bpf_uprobe_multi_link_attach() local
3377 return -EOPNOTSUPP; in bpf_uprobe_multi_link_attach()
3380 return -EINVAL; in bpf_uprobe_multi_link_attach()
3382 flags = attr->link_create.uprobe_multi.flags; in bpf_uprobe_multi_link_attach()
3384 return -EINVAL; in bpf_uprobe_multi_link_attach()
3387 * path, offsets and cnt are mandatory, in bpf_uprobe_multi_link_attach()
3390 upath = u64_to_user_ptr(attr->link_create.uprobe_multi.path); in bpf_uprobe_multi_link_attach()
3391 uoffsets = u64_to_user_ptr(attr->link_create.uprobe_multi.offsets); in bpf_uprobe_multi_link_attach()
3392 cnt = attr->link_create.uprobe_multi.cnt; in bpf_uprobe_multi_link_attach()
3393 pid = attr->link_create.uprobe_multi.pid; in bpf_uprobe_multi_link_attach()
3395 if (!upath || !uoffsets || !cnt || pid < 0) in bpf_uprobe_multi_link_attach()
3396 return -EINVAL; in bpf_uprobe_multi_link_attach()
3397 if (cnt > MAX_UPROBE_MULTI_CNT) in bpf_uprobe_multi_link_attach()
3398 return -E2BIG; in bpf_uprobe_multi_link_attach()
3400 uref_ctr_offsets = u64_to_user_ptr(attr->link_create.uprobe_multi.ref_ctr_offsets); in bpf_uprobe_multi_link_attach()
3401 ucookies = u64_to_user_ptr(attr->link_create.uprobe_multi.cookies); in bpf_uprobe_multi_link_attach()
3403 name = strndup_user(upath, PATH_MAX); in bpf_uprobe_multi_link_attach()
3404 if (IS_ERR(name)) { in bpf_uprobe_multi_link_attach()
3405 err = PTR_ERR(name); in bpf_uprobe_multi_link_attach()
3409 err = kern_path(name, LOOKUP_FOLLOW, &path); in bpf_uprobe_multi_link_attach()
3410 kfree(name); in bpf_uprobe_multi_link_attach()
3415 err = -EBADF; in bpf_uprobe_multi_link_attach()
3422 err = -ESRCH; in bpf_uprobe_multi_link_attach()
3427 err = -ENOMEM; in bpf_uprobe_multi_link_attach()
3430 uprobes = kvcalloc(cnt, sizeof(*uprobes), GFP_KERNEL); in bpf_uprobe_multi_link_attach()
3435 for (i = 0; i < cnt; i++) { in bpf_uprobe_multi_link_attach()
3437 err = -EFAULT; in bpf_uprobe_multi_link_attach()
3441 err = -EINVAL; in bpf_uprobe_multi_link_attach()
3445 err = -EFAULT; in bpf_uprobe_multi_link_attach()
3449 err = -EFAULT; in bpf_uprobe_multi_link_attach()
3465 link->cnt = cnt; in bpf_uprobe_multi_link_attach()
3466 link->uprobes = uprobes; in bpf_uprobe_multi_link_attach()
3467 link->path = path; in bpf_uprobe_multi_link_attach()
3468 link->task = task; in bpf_uprobe_multi_link_attach()
3469 link->flags = flags; in bpf_uprobe_multi_link_attach()
3471 bpf_link_init(&link->link, BPF_LINK_TYPE_UPROBE_MULTI, in bpf_uprobe_multi_link_attach()
3474 for (i = 0; i < cnt; i++) { in bpf_uprobe_multi_link_attach()
3475 uprobes[i].uprobe = uprobe_register(d_real_inode(link->path.dentry), in bpf_uprobe_multi_link_attach()
3481 link->cnt = i; in bpf_uprobe_multi_link_attach()
3486 err = bpf_link_prime(&link->link, &link_primer); in bpf_uprobe_multi_link_attach()
3493 bpf_uprobe_unregister(uprobes, link->cnt); in bpf_uprobe_multi_link_attach()
3507 return -EOPNOTSUPP; in bpf_uprobe_multi_link_attach()
3525 session_ctx = container_of(current->bpf_ctx, struct bpf_session_run_ctx, run_ctx); in bpf_session_is_return()
3526 return session_ctx->is_return; in bpf_session_is_return()
3533 session_ctx = container_of(current->bpf_ctx, struct bpf_session_run_ctx, run_ctx); in bpf_session_cookie()
3534 return session_ctx->data; in bpf_session_cookie()
3550 return -EACCES; in BTF_ID_FLAGS()
3570 __bpf_kfunc int bpf_send_signal_task(struct task_struct *task, int sig, enum pid_type type, in bpf_send_signal_task()
3574 return -EINVAL; in bpf_send_signal_task()