From patchwork Mon Mar 18 18:40:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595716 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 48C2122065 for ; Mon, 18 Mar 2024 18:40:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787243; cv=none; b=BYAZzSyvx6XhCaoDzn30/SCpQ3NrTleOET1bvgykofvhCtusW2CeZSfKUgAP7OLYhOnKfdkyUdOa6qas5hPC8/Mb6gTTG/ZaWt/t9UJ96krPgREshN1CbMu7WKa84gOA40EkvHZ0nbYOFgCmg+tp3yZlbN9P3Y5YesEIwIla7Qw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787243; c=relaxed/simple; bh=JHpeHtEVdSDGnLUj4D66AFo8fEXo+9uOmVdQ0Q0qY3o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N6NWhuLP97iQjmqz+HobhenYLc0ccvlc+nNDnPKlpFeAPIsEJ7lNrmqyzUCKrUYt3Kzfel93nQzz2S0oeDEq3P2iP9TI0913ZEyhb9T08xN/zVZfOckQ7yOygVwvcTEB8Zjuv15JcyZxvznjO4EBAkq5lMjGcCJYH5zZ5is5HdM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JQAYPHlU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JQAYPHlU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A59BC433A6; Mon, 18 Mar 2024 18:40:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787242; bh=JHpeHtEVdSDGnLUj4D66AFo8fEXo+9uOmVdQ0Q0qY3o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JQAYPHlU7u/TtKtITtrlWfuXLULA4h6lAgsDKE/DwYPkvmO2UDtc+YG3R0ngNfpbW aNmRIpAYujtl9/dnFTwpslH5NhgMFWRfc7WKyH+PjCNLl9HLtSbn59dHAbL6e11tTg u/Djup1RxslGx+fiQxWVcJfThqP71w+TibkakrwlX9M3qqE0oHJJk8omJTzCYeW6Rf 4AErdhAMU1SbH4mtM87hwhcI/AqrAzPuoquUpNIgsM7+wERxymOLQcT5t44jtLYbWL MdExtXyINyK0uBy3cvhcFc5GmgoLcxab2g0OeqJvBCmp0Uw+Ld5Ld1Ixbwl/ICnduO oPaadORhHfSZw== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com, Stanislav Fomichev Subject: [PATCH v2 bpf-next 1/5] bpf: flatten bpf_probe_register call chain Date: Mon, 18 Mar 2024 11:40:33 -0700 Message-ID: <20240318184037.3209242-2-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240318184037.3209242-1-andrii@kernel.org> References: <20240318184037.3209242-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net bpf_probe_register() and __bpf_probe_register() have identical signatures and bpf_probe_register() just redirect to __bpf_probe_register(). So get rid of this extra function call step to simplify following the source code. It has no difference at runtime due to inlining, of course. Acked-by: Stanislav Fomichev Signed-off-by: Andrii Nakryiko --- kernel/trace/bpf_trace.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 0a5c4efc73c3..f29735bb7aed 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2429,7 +2429,7 @@ BPF_TRACE_DEFN_x(10); BPF_TRACE_DEFN_x(11); BPF_TRACE_DEFN_x(12); -static int __bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog) +int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog) { struct tracepoint *tp = btp->tp; @@ -2447,11 +2447,6 @@ static int __bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog * prog); } -int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog) -{ - return __bpf_probe_register(btp, prog); -} - int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog) { return tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, prog); From patchwork Mon Mar 18 18:40:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595717 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5393A22065 for ; Mon, 18 Mar 2024 18:40:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787246; cv=none; b=EEZJ0EcD/EgTQIdQ450+Ap3zaKht/t8WlI+mhgsLTsdsDR6aUGyLkZeAd+gSFqmhqKHxGYfLE2VQo5em8ECl9YepGBzvgoTpArqEakXUs2PWskPj2G0icZ2r9o8FE34VFGnKm79v2p9STrB84b/GLXy8y6bNQj2gvjjtMzegzBU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787246; c=relaxed/simple; bh=V8S6ArvyWGIZniiNN6YeRZbWY4anVGMrfwLjWNFiD8Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gu+O5jPhuct8qpd/m1qPz7aXS8U7wsBhQlD+AIOUP3VZlEkVDsKMLmqF3kfDUX2OOnAJZ+KcNDXenJC75LVRkAObHV47pQIkEPTXKNpEvigRjkJeLr/dSkUJYxJjoFqiWfg1irvF03wTOB01xsit14YoJ73g8W5HHhjl7SGAe6I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EgO++OgU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EgO++OgU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B32FDC433F1; Mon, 18 Mar 2024 18:40:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787245; bh=V8S6ArvyWGIZniiNN6YeRZbWY4anVGMrfwLjWNFiD8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EgO++OgUvSLp2W7RM0MBmKXrvynStqjufuLnTiDsrFfomZgIurnjFI2o03lJqOJLX SmHWb1mkTISAfqZ7SsES+VH09Hmu9cmpQq+vlJ3LYD1M7KETlAq341cG53B3rTtCmC LBa2AjoNINwUiGZIQ17UYcdusQfVmSV3a/5dg+clKaVh0c6DJ5wdegTHpyT3CGs/8m Io7SGM9KouBZ+5YU98hR+F/cFEYTvI7vbIjtojyrCLKWCw+f7Wrb/dmzTMUq+oASbn 1KOmc7N/P74a/NXrKyb3hQszkHcGreANZjOdSPKCOvvt5dikCmDCPn/buLzebX9sPo AErctYsYj4ssg== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com, Stanislav Fomichev Subject: [PATCH v2 bpf-next 2/5] bpf: pass whole link instead of prog when triggering raw tracepoint Date: Mon, 18 Mar 2024 11:40:34 -0700 Message-ID: <20240318184037.3209242-3-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240318184037.3209242-1-andrii@kernel.org> References: <20240318184037.3209242-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Instead of passing prog as an argument to bpf_trace_runX() helpers, that are called from tracepoint triggering calls, store BPF link itself (struct bpf_raw_tp_link for raw tracepoints). This will allow to pass extra information like BPF cookie into raw tracepoint registration. Instead of replacing `struct bpf_prog *prog = __data;` with corresponding `struct bpf_raw_tp_link *link = __data;` assignment in `__bpf_trace_##call` I just passed `__data` through into underlying bpf_trace_runX() call. This works well because we implicitly cast `void *`, and it also avoids naming clashes with arguments coming from tracepoint's "proto" list. We could have run into the same problem with "prog", we just happened to not have a tracepoint that has "prog" input argument. We are less lucky with "link", as there are tracepoints using "link" argument name already. So instead of trying to avoid naming conflicts, let's just remove intermediate local variable. It doesn't hurt readibility, it's either way a bit of a maze of calls and macros, that requires careful reading. Acked-by: Stanislav Fomichev Signed-off-by: Andrii Nakryiko --- include/linux/bpf.h | 5 +++++ include/linux/trace_events.h | 36 ++++++++++++++++++++---------------- include/trace/bpf_probe.h | 3 +-- kernel/bpf/syscall.c | 9 ++------- kernel/trace/bpf_trace.c | 18 ++++++++++-------- 5 files changed, 38 insertions(+), 33 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 4f20f62f9d63..f8a09a742e38 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1608,6 +1608,11 @@ struct bpf_tracing_link { struct bpf_prog *tgt_prog; }; +struct bpf_raw_tp_link { + struct bpf_link link; + struct bpf_raw_event_map *btp; +}; + struct bpf_link_primer { struct bpf_link *link; struct file *file; diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index d68ff9b1247f..a7fc6fb6de3c 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -759,8 +759,11 @@ unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx); int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie); void perf_event_detach_bpf_prog(struct perf_event *event); int perf_event_query_prog_array(struct perf_event *event, void __user *info); -int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog); -int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog); + +struct bpf_raw_tp_link; +int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link); +int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link); + struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, @@ -788,11 +791,12 @@ perf_event_query_prog_array(struct perf_event *event, void __user *info) { return -EOPNOTSUPP; } -static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) +struct bpf_raw_tp_link; +static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link) { return -EOPNOTSUPP; } -static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) +static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link) { return -EOPNOTSUPP; } @@ -903,31 +907,31 @@ void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie); void perf_event_free_bpf_prog(struct perf_event *event); -void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); -void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); -void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run1(struct bpf_raw_tp_link *link, u64 arg1); +void bpf_trace_run2(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2); +void bpf_trace_run3(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3); -void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run4(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4); -void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run5(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5); -void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run6(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6); -void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run7(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); -void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run8(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8); -void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run9(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8, u64 arg9); -void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run10(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8, u64 arg9, u64 arg10); -void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run11(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8, u64 arg9, u64 arg10, u64 arg11); -void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, +void bpf_trace_run12(struct bpf_raw_tp_link *link, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, diff --git a/include/trace/bpf_probe.h b/include/trace/bpf_probe.h index e609cd7da47e..a2ea11cc912e 100644 --- a/include/trace/bpf_probe.h +++ b/include/trace/bpf_probe.h @@ -46,8 +46,7 @@ static notrace void \ __bpf_trace_##call(void *__data, proto) \ { \ - struct bpf_prog *prog = __data; \ - CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(prog, CAST_TO_U64(args)); \ + CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(__data, CAST_TO_U64(args)); \ } #undef DECLARE_EVENT_CLASS diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index ae2ff73bde7e..1cb4c3809af4 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3469,17 +3469,12 @@ static int bpf_tracing_prog_attach(struct bpf_prog *prog, return err; } -struct bpf_raw_tp_link { - struct bpf_link link; - struct bpf_raw_event_map *btp; -}; - static void bpf_raw_tp_link_release(struct bpf_link *link) { struct bpf_raw_tp_link *raw_tp = container_of(link, struct bpf_raw_tp_link, link); - bpf_probe_unregister(raw_tp->btp, raw_tp->link.prog); + bpf_probe_unregister(raw_tp->btp, raw_tp); bpf_put_raw_tracepoint(raw_tp->btp); } @@ -3833,7 +3828,7 @@ static int bpf_raw_tp_link_attach(struct bpf_prog *prog, goto out_put_btp; } - err = bpf_probe_register(link->btp, prog); + err = bpf_probe_register(link->btp, link); if (err) { bpf_link_cleanup(&link_primer); goto out_put_btp; diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index f29735bb7aed..ed4c3610b5b5 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2370,8 +2370,10 @@ void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) } static __always_inline -void __bpf_trace_run(struct bpf_prog *prog, u64 *args) +void __bpf_trace_run(struct bpf_raw_tp_link *link, u64 *args) { + struct bpf_prog *prog = link->link.prog; + cant_sleep(); if (unlikely(this_cpu_inc_return(*(prog->active)) != 1)) { bpf_prog_inc_misses_counter(prog); @@ -2408,12 +2410,12 @@ void __bpf_trace_run(struct bpf_prog *prog, u64 *args) #define __SEQ_0_11 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 #define BPF_TRACE_DEFN_x(x) \ - void bpf_trace_run##x(struct bpf_prog *prog, \ + void bpf_trace_run##x(struct bpf_raw_tp_link *link, \ REPEAT(x, SARG, __DL_COM, __SEQ_0_11)) \ { \ u64 args[x]; \ REPEAT(x, COPY, __DL_SEM, __SEQ_0_11); \ - __bpf_trace_run(prog, args); \ + __bpf_trace_run(link, args); \ } \ EXPORT_SYMBOL_GPL(bpf_trace_run##x) BPF_TRACE_DEFN_x(1); @@ -2429,9 +2431,10 @@ BPF_TRACE_DEFN_x(10); BPF_TRACE_DEFN_x(11); BPF_TRACE_DEFN_x(12); -int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog) +int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link) { struct tracepoint *tp = btp->tp; + struct bpf_prog *prog = link->link.prog; /* * check that program doesn't access arguments beyond what's @@ -2443,13 +2446,12 @@ int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog) if (prog->aux->max_tp_access > btp->writable_size) return -EINVAL; - return tracepoint_probe_register_may_exist(tp, (void *)btp->bpf_func, - prog); + return tracepoint_probe_register_may_exist(tp, (void *)btp->bpf_func, link); } -int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog) +int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_raw_tp_link *link) { - return tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, prog); + return tracepoint_probe_unregister(btp->tp, (void *)btp->bpf_func, link); } int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, From patchwork Mon Mar 18 18:40:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595718 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A5F1B38DD3 for ; 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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aZ6uR+ak" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05FF7C433F1; Mon, 18 Mar 2024 18:40:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787249; bh=2AjDyS8c5pWQBWU7ZRgXw9o5QueMlSAGRUlsL+5DP94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aZ6uR+akDoIzt+Rs8TE9Xgz5hhljmLsRkFH9fbdVzIsoyDtc8JSmo6w5nh+VRTnIS w9e09msp70QnRnLxYHHya6trGATBvHAebU/wQnRIvIesmYLaBFXLso5Fs9creJcK87 /BhQB6Qvzl+8UcdMrMirVODU/ZUzkVjwlN1UvDRq9VnfiR/HWWIPpb0o0wBx4KaHaS DuQ7BWwe5eACOYmIH291b08qomle5brIyiwK7pXBkZGzaEFsRccx+EYhLyUOABLqnF jNMxDD08TMyiZDgFuhGvRBq8pA9D/G+r61sjURtvQu7SwyfktccHkSAC9kkxVeF1hW O9Q5tzayd2SYA== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com, Stanislav Fomichev Subject: [PATCH v2 bpf-next 3/5] bpf: support BPF cookie in raw tracepoint (raw_tp, tp_btf) programs Date: Mon, 18 Mar 2024 11:40:35 -0700 Message-ID: <20240318184037.3209242-4-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240318184037.3209242-1-andrii@kernel.org> References: <20240318184037.3209242-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Wire up BPF cookie for raw tracepoint programs (both BTF and non-BTF aware variants). This brings them up to part w.r.t. BPF cookie usage with classic tracepoint and fentry/fexit programs. Acked-by: Stanislav Fomichev Signed-off-by: Andrii Nakryiko Acked-by: Eduard Zingerman --- include/linux/bpf.h | 1 + include/uapi/linux/bpf.h | 6 ++++-- kernel/bpf/syscall.c | 13 +++++++++---- kernel/trace/bpf_trace.c | 13 +++++++++++++ tools/include/uapi/linux/bpf.h | 1 + 5 files changed, 28 insertions(+), 6 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index f8a09a742e38..32dde6ce7e92 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1611,6 +1611,7 @@ struct bpf_tracing_link { struct bpf_raw_tp_link { struct bpf_link link; struct bpf_raw_event_map *btp; + u64 cookie; }; struct bpf_link_primer { diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 3c42b9f1bada..9585f5345353 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -1662,8 +1662,10 @@ union bpf_attr { } query; struct { /* anonymous struct used by BPF_RAW_TRACEPOINT_OPEN command */ - __u64 name; - __u32 prog_fd; + __u64 name; + __u32 prog_fd; + __u32 :32; + __aligned_u64 cookie; } raw_tracepoint; struct { /* anonymous struct for BPF_BTF_LOAD */ diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 1cb4c3809af4..e44c276e8617 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3774,7 +3774,7 @@ static int bpf_perf_link_attach(const union bpf_attr *attr, struct bpf_prog *pro #endif /* CONFIG_PERF_EVENTS */ static int bpf_raw_tp_link_attach(struct bpf_prog *prog, - const char __user *user_tp_name) + const char __user *user_tp_name, u64 cookie) { struct bpf_link_primer link_primer; struct bpf_raw_tp_link *link; @@ -3821,6 +3821,7 @@ static int bpf_raw_tp_link_attach(struct bpf_prog *prog, bpf_link_init(&link->link, BPF_LINK_TYPE_RAW_TRACEPOINT, &bpf_raw_tp_link_lops, prog); link->btp = btp; + link->cookie = cookie; err = bpf_link_prime(&link->link, &link_primer); if (err) { @@ -3841,11 +3842,13 @@ static int bpf_raw_tp_link_attach(struct bpf_prog *prog, return err; } -#define BPF_RAW_TRACEPOINT_OPEN_LAST_FIELD raw_tracepoint.prog_fd +#define BPF_RAW_TRACEPOINT_OPEN_LAST_FIELD raw_tracepoint.cookie static int bpf_raw_tracepoint_open(const union bpf_attr *attr) { struct bpf_prog *prog; + void __user *tp_name; + __u64 cookie; int fd; if (CHECK_ATTR(BPF_RAW_TRACEPOINT_OPEN)) @@ -3855,7 +3858,9 @@ static int bpf_raw_tracepoint_open(const union bpf_attr *attr) if (IS_ERR(prog)) return PTR_ERR(prog); - fd = bpf_raw_tp_link_attach(prog, u64_to_user_ptr(attr->raw_tracepoint.name)); + tp_name = u64_to_user_ptr(attr->raw_tracepoint.name); + cookie = attr->raw_tracepoint.cookie; + fd = bpf_raw_tp_link_attach(prog, tp_name, cookie); if (fd < 0) bpf_prog_put(prog); return fd; @@ -5193,7 +5198,7 @@ static int link_create(union bpf_attr *attr, bpfptr_t uattr) goto out; } if (prog->expected_attach_type == BPF_TRACE_RAW_TP) - ret = bpf_raw_tp_link_attach(prog, NULL); + ret = bpf_raw_tp_link_attach(prog, NULL, attr->link_create.tracing.cookie); else if (prog->expected_attach_type == BPF_TRACE_ITER) ret = bpf_iter_link_attach(attr, uattr, prog); else if (prog->expected_attach_type == BPF_LSM_CGROUP) diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index ed4c3610b5b5..f9b217bf9f32 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -2008,6 +2008,8 @@ raw_tp_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_get_stackid_proto_raw_tp; case BPF_FUNC_get_stack: return &bpf_get_stack_proto_raw_tp; + case BPF_FUNC_get_attach_cookie: + return &bpf_get_attach_cookie_proto_tracing; default: return bpf_tracing_func_proto(func_id, prog); } @@ -2070,6 +2072,9 @@ tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) case BPF_FUNC_get_func_arg_cnt: return bpf_prog_has_trampoline(prog) ? &bpf_get_func_arg_cnt_proto : NULL; case BPF_FUNC_get_attach_cookie: + if (prog->type == BPF_PROG_TYPE_TRACING && + prog->expected_attach_type == BPF_TRACE_RAW_TP) + return &bpf_get_attach_cookie_proto_tracing; return bpf_prog_has_trampoline(prog) ? &bpf_get_attach_cookie_proto_tracing : NULL; default: fn = raw_tp_prog_func_proto(func_id, prog); @@ -2373,15 +2378,23 @@ static __always_inline void __bpf_trace_run(struct bpf_raw_tp_link *link, u64 *args) { struct bpf_prog *prog = link->link.prog; + struct bpf_run_ctx *old_run_ctx; + struct bpf_trace_run_ctx run_ctx; cant_sleep(); if (unlikely(this_cpu_inc_return(*(prog->active)) != 1)) { bpf_prog_inc_misses_counter(prog); goto out; } + + run_ctx.bpf_cookie = link->cookie; + old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); + rcu_read_lock(); (void) bpf_prog_run(prog, args); rcu_read_unlock(); + + bpf_reset_run_ctx(old_run_ctx); out: this_cpu_dec(*(prog->active)); } diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 3c42b9f1bada..bf80b614c4db 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -1664,6 +1664,7 @@ union bpf_attr { struct { /* anonymous struct used by BPF_RAW_TRACEPOINT_OPEN command */ __u64 name; __u32 prog_fd; + __aligned_u64 cookie; } raw_tracepoint; struct { /* anonymous struct for BPF_BTF_LOAD */ From patchwork Mon Mar 18 18:40:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595719 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B752F219F6 for ; Mon, 18 Mar 2024 18:40:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787252; cv=none; b=O1VCC5GPsm6zzfRxL4gkYqgqLANcXBS5NNvw2M/SqE6wTh6MYGW/J0VRMIwT9lSnpXvVL3e5pD3wFfnqOtiO+FN0MDvb/4wZCwrZUUuE+genzIbB9ROSPQjxpT4ApJMQWVsVRp+eRRmeU/MjQgtJqW7idg2YgT5WgCYNYMBeDvc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710787252; c=relaxed/simple; bh=pUS6a7pMQcExsy+qxQf8B94rU4lII6rnu7dHy0gRRH0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kYKDErFlhGIdzfteZVGVbJB8sw/RHd02vesLhZH3tZaDifewNRN0n9mRFwzq/5zw9eoQf+9FUbNEp21x2YnnjcswXyOm0aH6K+tV0UEUekKHPUwIsFephaVRyKwMi9iufossg8aut2bAzEnkX+ZQxj2/iVgWtab4XntOUY7iF20= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TPFez5BP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TPFez5BP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E48CC433F1; Mon, 18 Mar 2024 18:40:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787252; bh=pUS6a7pMQcExsy+qxQf8B94rU4lII6rnu7dHy0gRRH0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TPFez5BPkwu6ZcW0LDPDOZnRANjHS3OvIwvROV32IYAdjNi4Lm1rNazk1ZrFKYxUS nEMn1qTKuZOXIgkT7hN/N0EczWNSY/51raitlXuHsiuF4sozyCmOMZuwlemz+/b7d+ ALnT229PEjndW0oVyEOHWS3VqK4VrKBb6d9PWzLeDZAPGFLC24WWbmDCjAVb8WIn5h yvwE7YZ5kYOgQX0M+1BE40anYKwOsorkOfqpfbOA/quoLMbHoHpGS5/Djt6SFoMuep gE0vZEqzu60lttvjOp3f00jwuK5cz8ygJcOwCyU1XGzun8lXUkqMUdbzuKe4iaEU7y 8QeuwJCRH0Kfg== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com, Stanislav Fomichev Subject: [PATCH v2 bpf-next 4/5] libbpf: add support for BPF cookie for raw_tp/tp_btf programs Date: Mon, 18 Mar 2024 11:40:36 -0700 Message-ID: <20240318184037.3209242-5-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240318184037.3209242-1-andrii@kernel.org> References: <20240318184037.3209242-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Wire up BPF cookie passing or raw_tp and tp_btf programs, both in low-level and high-level APIs. Acked-by: Stanislav Fomichev Signed-off-by: Andrii Nakryiko Acked-by: Eduard Zingerman --- tools/lib/bpf/bpf.c | 16 ++++++++++++++-- tools/lib/bpf/bpf.h | 9 +++++++++ tools/lib/bpf/libbpf.c | 20 +++++++++++++++++--- tools/lib/bpf/libbpf.h | 11 +++++++++++ tools/lib/bpf/libbpf.map | 2 ++ 5 files changed, 53 insertions(+), 5 deletions(-) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 97ec005c3c47..65d25c3c6508 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -785,6 +785,7 @@ int bpf_link_create(int prog_fd, int target_fd, if (!OPTS_ZEROED(opts, uprobe_multi)) return libbpf_err(-EINVAL); break; + case BPF_TRACE_RAW_TP: case BPF_TRACE_FENTRY: case BPF_TRACE_FEXIT: case BPF_MODIFY_RETURN: @@ -1173,20 +1174,31 @@ int bpf_link_get_info_by_fd(int link_fd, struct bpf_link_info *info, __u32 *info return bpf_obj_get_info_by_fd(link_fd, info, info_len); } -int bpf_raw_tracepoint_open(const char *name, int prog_fd) +int bpf_raw_tp_open(int prog_fd, struct bpf_raw_tp_opts *opts) { const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint); union bpf_attr attr; int fd; + if (!OPTS_VALID(opts, bpf_raw_tp_opts)) + return libbpf_err(-EINVAL); + memset(&attr, 0, attr_sz); - attr.raw_tracepoint.name = ptr_to_u64(name); attr.raw_tracepoint.prog_fd = prog_fd; + attr.raw_tracepoint.name = ptr_to_u64(OPTS_GET(opts, tp_name, NULL)); + attr.raw_tracepoint.cookie = OPTS_GET(opts, cookie, 0); fd = sys_bpf_fd(BPF_RAW_TRACEPOINT_OPEN, &attr, attr_sz); return libbpf_err_errno(fd); } +int bpf_raw_tracepoint_open(const char *name, int prog_fd) +{ + LIBBPF_OPTS(bpf_raw_tp_opts, opts, .tp_name = name); + + return bpf_raw_tp_open(prog_fd, &opts); +} + int bpf_btf_load(const void *btf_data, size_t btf_size, struct bpf_btf_load_opts *opts) { const size_t attr_sz = offsetofend(union bpf_attr, btf_token_fd); diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index df0db2f0cdb7..bf8162fbccf9 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -617,6 +617,15 @@ LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags, __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt); +struct bpf_raw_tp_opts { + size_t sz; /* size of this struct for forward/backward compatibility */ + const char *tp_name; + __u64 cookie; + size_t :0; +}; +#define bpf_raw_tp_opts__last_field cookie + +LIBBPF_API int bpf_raw_tp_open(int prog_fd, struct bpf_raw_tp_opts *opts); LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd); LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 604368cfbf02..c4981e5c0bdf 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -12280,13 +12280,19 @@ static int attach_tp(const struct bpf_program *prog, long cookie, struct bpf_lin return libbpf_get_error(*link); } -struct bpf_link *bpf_program__attach_raw_tracepoint(const struct bpf_program *prog, - const char *tp_name) +struct bpf_link * +bpf_program__attach_raw_tracepoint_opts(const struct bpf_program *prog, + const char *tp_name, + struct bpf_raw_tracepoint_opts *opts) { + LIBBPF_OPTS(bpf_raw_tp_opts, raw_opts); char errmsg[STRERR_BUFSIZE]; struct bpf_link *link; int prog_fd, pfd; + if (!OPTS_VALID(opts, bpf_raw_tracepoint_opts)) + return libbpf_err_ptr(-EINVAL); + prog_fd = bpf_program__fd(prog); if (prog_fd < 0) { pr_warn("prog '%s': can't attach before loaded\n", prog->name); @@ -12298,7 +12304,9 @@ struct bpf_link *bpf_program__attach_raw_tracepoint(const struct bpf_program *pr return libbpf_err_ptr(-ENOMEM); link->detach = &bpf_link__detach_fd; - pfd = bpf_raw_tracepoint_open(tp_name, prog_fd); + raw_opts.tp_name = tp_name; + raw_opts.cookie = OPTS_GET(opts, cookie, 0); + pfd = bpf_raw_tp_open(prog_fd, &raw_opts); if (pfd < 0) { pfd = -errno; free(link); @@ -12310,6 +12318,12 @@ struct bpf_link *bpf_program__attach_raw_tracepoint(const struct bpf_program *pr return link; } +struct bpf_link *bpf_program__attach_raw_tracepoint(const struct bpf_program *prog, + const char *tp_name) +{ + return bpf_program__attach_raw_tracepoint_opts(prog, tp_name, NULL); +} + static int attach_raw_tp(const struct bpf_program *prog, long cookie, struct bpf_link **link) { static const char *const prefixes[] = { diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 7b510761f545..f88ab50c0229 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -760,9 +760,20 @@ bpf_program__attach_tracepoint_opts(const struct bpf_program *prog, const char *tp_name, const struct bpf_tracepoint_opts *opts); +struct bpf_raw_tracepoint_opts { + size_t sz; /* size of this struct for forward/backward compatibility */ + __u64 cookie; + size_t :0; +}; +#define bpf_raw_tracepoint_opts__last_field cookie + LIBBPF_API struct bpf_link * bpf_program__attach_raw_tracepoint(const struct bpf_program *prog, const char *tp_name); +LIBBPF_API struct bpf_link * +bpf_program__attach_raw_tracepoint_opts(const struct bpf_program *prog, + const char *tp_name, + struct bpf_raw_tracepoint_opts *opts); struct bpf_trace_opts { /* size of this struct, for forward/backward compatibility */ diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 86804fd90dd1..53dbdaad0df1 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -410,6 +410,8 @@ LIBBPF_1.3.0 { LIBBPF_1.4.0 { global: + bpf_program__attach_raw_tracepoint_opts; + bpf_raw_tp_open; bpf_token_create; btf__new_split; btf_ext__raw_data; From patchwork Mon Mar 18 18:40:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13595720 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14F062E400 for ; 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dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KyghH9kR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D79EC433F1; Mon, 18 Mar 2024 18:40:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710787255; bh=aFHaMUjDRF+R+p20LmifZamCqh0LdfaVSrDs7fUbIWg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KyghH9kRlwJUb9SKnOxbBBINfQWedmEajTciDTrr1jnCQA8rYbQL7iMmFWOe/IW5X NyyN6+5ngpXFuCxHMKCqiQe5E8NqXVxckPxROre/dDexDm0GHTesdNPIQOg9GrG1Iv NXkgmHYclAQuwXZh7xI6X5qBtZB1A5WVHEhuP924/Gw+fkwTqBaXLSpVJP755Lc44y e+SeMWSGQ03WIki+WJQnnV3JscivSCW+QzGtQhsHl57xPN+dVzc3FKHfif6VfUBVvN gpB772JRrE47BXY0l9ZRGZsv+AakFGPyr84vD3xghU7PZs/0dtLHmkpgKVLTTrWKyR en0dlZ+4pfZ7w== From: Andrii Nakryiko To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, martin.lau@kernel.org Cc: andrii@kernel.org, kernel-team@meta.com, Stanislav Fomichev Subject: [PATCH v2 bpf-next 5/5] selftests/bpf: add raw_tp/tp_btf BPF cookie subtests Date: Mon, 18 Mar 2024 11:40:37 -0700 Message-ID: <20240318184037.3209242-6-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240318184037.3209242-1-andrii@kernel.org> References: <20240318184037.3209242-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Add test validating BPF cookie can be passed during raw_tp/tp_btf attachment and can be retried at runtime with bpf_get_attach_cookie() helper. Acked-by: Stanislav Fomichev Signed-off-by: Andrii Nakryiko --- .../selftests/bpf/prog_tests/bpf_cookie.c | 114 +++++++++++++++++- .../selftests/bpf/progs/test_bpf_cookie.c | 16 +++ 2 files changed, 129 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c b/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c index 1454cebc262b..f6c507c69ad2 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_cookie.c @@ -573,6 +573,115 @@ static void lsm_subtest(struct test_bpf_cookie *skel) close(lsm_fd); } +static void tp_btf_subtest(struct test_bpf_cookie *skel) +{ + __u64 cookie; + int prog_fd, link_fd = -1; + struct bpf_link *link = NULL; + LIBBPF_OPTS(bpf_link_create_opts, link_opts); + LIBBPF_OPTS(bpf_raw_tp_opts, raw_tp_opts); + LIBBPF_OPTS(bpf_trace_opts, trace_opts); + + /* There are three different ways to attach tp_btf (BTF-aware raw + * tracepoint) programs. Let's test all of them. + */ + prog_fd = bpf_program__fd(skel->progs.handle_tp_btf); + + /* low-level BPF_RAW_TRACEPOINT_OPEN command wrapper */ + skel->bss->tp_btf_res = 0; + + raw_tp_opts.cookie = cookie = 0x11000000000000L; + link_fd = bpf_raw_tp_open(prog_fd, &raw_tp_opts); + if (!ASSERT_GE(link_fd, 0, "bpf_raw_tp_open")) + goto cleanup; + + usleep(1); /* trigger */ + close(link_fd); /* detach */ + link_fd = -1; + + ASSERT_EQ(skel->bss->tp_btf_res, cookie, "raw_tp_open_res"); + + /* low-level generic bpf_link_create() API */ + skel->bss->tp_btf_res = 0; + + link_opts.tracing.cookie = cookie = 0x22000000000000L; + link_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_RAW_TP, &link_opts); + if (!ASSERT_GE(link_fd, 0, "bpf_link_create")) + goto cleanup; + + usleep(1); /* trigger */ + close(link_fd); /* detach */ + link_fd = -1; + + ASSERT_EQ(skel->bss->tp_btf_res, cookie, "link_create_res"); + + /* high-level bpf_link-based bpf_program__attach_trace_opts() API */ + skel->bss->tp_btf_res = 0; + + trace_opts.cookie = cookie = 0x33000000000000L; + link = bpf_program__attach_trace_opts(skel->progs.handle_tp_btf, &trace_opts); + if (!ASSERT_OK_PTR(link, "attach_trace_opts")) + goto cleanup; + + usleep(1); /* trigger */ + bpf_link__destroy(link); /* detach */ + link = NULL; + + ASSERT_EQ(skel->bss->tp_btf_res, cookie, "attach_trace_opts_res"); + +cleanup: + if (link_fd >= 0) + close(link_fd); + bpf_link__destroy(link); +} + +static void raw_tp_subtest(struct test_bpf_cookie *skel) +{ + __u64 cookie; + int prog_fd, link_fd = -1; + struct bpf_link *link = NULL; + LIBBPF_OPTS(bpf_raw_tp_opts, raw_tp_opts); + LIBBPF_OPTS(bpf_raw_tracepoint_opts, opts); + + /* There are two different ways to attach raw_tp programs */ + prog_fd = bpf_program__fd(skel->progs.handle_raw_tp); + + /* low-level BPF_RAW_TRACEPOINT_OPEN command wrapper */ + skel->bss->raw_tp_res = 0; + + raw_tp_opts.tp_name = "sys_enter"; + raw_tp_opts.cookie = cookie = 0x55000000000000L; + link_fd = bpf_raw_tp_open(prog_fd, &raw_tp_opts); + if (!ASSERT_GE(link_fd, 0, "bpf_raw_tp_open")) + goto cleanup; + + usleep(1); /* trigger */ + close(link_fd); /* detach */ + link_fd = -1; + + ASSERT_EQ(skel->bss->raw_tp_res, cookie, "raw_tp_open_res"); + + /* high-level bpf_link-based bpf_program__attach_raw_tracepoint_opts() API */ + skel->bss->raw_tp_res = 0; + + opts.cookie = cookie = 0x66000000000000L; + link = bpf_program__attach_raw_tracepoint_opts(skel->progs.handle_raw_tp, + "sys_enter", &opts); + if (!ASSERT_OK_PTR(link, "attach_raw_tp_opts")) + goto cleanup; + + usleep(1); /* trigger */ + bpf_link__destroy(link); /* detach */ + link = NULL; + + ASSERT_EQ(skel->bss->raw_tp_res, cookie, "attach_raw_tp_opts_res"); + +cleanup: + if (link_fd >= 0) + close(link_fd); + bpf_link__destroy(link); +} + void test_bpf_cookie(void) { struct test_bpf_cookie *skel; @@ -601,6 +710,9 @@ void test_bpf_cookie(void) tracing_subtest(skel); if (test__start_subtest("lsm")) lsm_subtest(skel); - + if (test__start_subtest("tp_btf")) + tp_btf_subtest(skel); + if (test__start_subtest("raw_tp")) + raw_tp_subtest(skel); test_bpf_cookie__destroy(skel); } diff --git a/tools/testing/selftests/bpf/progs/test_bpf_cookie.c b/tools/testing/selftests/bpf/progs/test_bpf_cookie.c index 5a3a80f751c4..c83142b55f47 100644 --- a/tools/testing/selftests/bpf/progs/test_bpf_cookie.c +++ b/tools/testing/selftests/bpf/progs/test_bpf_cookie.c @@ -15,6 +15,8 @@ __u64 uprobe_res; __u64 uretprobe_res; __u64 tp_res; __u64 pe_res; +__u64 raw_tp_res; +__u64 tp_btf_res; __u64 fentry_res; __u64 fexit_res; __u64 fmod_ret_res; @@ -87,6 +89,20 @@ int handle_pe(struct pt_regs *ctx) return 0; } +SEC("raw_tp/sys_enter") +int handle_raw_tp(void *ctx) +{ + update(ctx, &raw_tp_res); + return 0; +} + +SEC("tp_btf/sys_enter") +int handle_tp_btf(void *ctx) +{ + update(ctx, &tp_btf_res); + return 0; +} + SEC("fentry/bpf_fentry_test1") int BPF_PROG(fentry_test1, int a) {