From patchwork Thu Aug 29 18:37:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13783556 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 BCD3A1B9B4B; Thu, 29 Aug 2024 18:37:56 +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=1724956676; cv=none; b=YnUOV4eDHUg/kBkW5QNUKsxP1pVei6ONMnbU5roREIshVlT11/KzgYnJwqwH8c0HxjkCZPD58OwSeZmoo3gY6lyyw0STtiDeInQ6KW6ysKfZlDTssrQtqvoEnz3tfORCFc4cez/WoVm/MfZJ7g3GSg/soVfz2wYfzNg9cdc6Nvk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724956676; c=relaxed/simple; bh=uB9+IvJHW7QHyKw3tlvcdrmTqmlaEh8Wb6qWvDMkeqI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dt43ZIaLuGZpYedgsDK0wW+vke0ADGoN4n3aYBfjEqC5dBZnkNLxGPGC2zLwZ4lVLHLraGewYx5gWxo6wv8RHq01LeH/0wCmfJo0DiLqv9uCtjSXBIquqYOC+QokqMsuSXr7XLMwFdE5prI+pYNmJxJVU3CzxRa/sWAAR7imhpw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R0C32/Hx; 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="R0C32/Hx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C858C4CEC1; Thu, 29 Aug 2024 18:37:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724956676; bh=uB9+IvJHW7QHyKw3tlvcdrmTqmlaEh8Wb6qWvDMkeqI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R0C32/HxcnullYmYODfLBOAm95ENZ77LpyOSqhrTR5282TU19iHVfGCtTERRKl4Xd gEoceEOvrXWiPR5WvCbPIecsj2plew3ivwlj3WwOiAqxtwwECBThdxn+Mml3qBA7j7 RLikOuen3wU/dRuBorVMIGts13xMDZhNtC+ScbQHhOTSUgZgSpZENOzdXljKuGXaFz YeSw7eef693DWz+loTFI1HdJQofxGf/eI6YuLHudlkEPyXtX49LpuPxfuZb0xUEQ2N 3fNV9bCTWMO+3XFKlfnJzuS7l4KTglLvSyd9817qOMzE0nGaBC3Lsy+GfsR3F2RXDv ZFYHpe9IhIO1w== From: Andrii Nakryiko To: linux-trace-kernel@vger.kernel.org, peterz@infradead.org, oleg@redhat.com Cc: rostedt@goodmis.org, mhiramat@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, jolsa@kernel.org, paulmck@kernel.org, willy@infradead.org, surenb@google.com, akpm@linux-foundation.org, linux-mm@kvack.org, Andrii Nakryiko Subject: [PATCH v4 3/8] uprobes: get rid of enum uprobe_filter_ctx in uprobe filter callbacks Date: Thu, 29 Aug 2024 11:37:36 -0700 Message-ID: <20240829183741.3331213-4-andrii@kernel.org> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240829183741.3331213-1-andrii@kernel.org> References: <20240829183741.3331213-1-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 It serves no purpose beyond adding unnecessray argument passed to the filter callback. Just get rid of it, no one is actually using it. Signed-off-by: Andrii Nakryiko --- include/linux/uprobes.h | 10 +--------- kernel/events/uprobes.c | 18 +++++++----------- kernel/trace/bpf_trace.c | 3 +-- kernel/trace/trace_uprobe.c | 9 +++------ 4 files changed, 12 insertions(+), 28 deletions(-) diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 6332c111036e..9cf0dce62e4c 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -28,20 +28,12 @@ struct page; #define MAX_URETPROBE_DEPTH 64 -enum uprobe_filter_ctx { - UPROBE_FILTER_REGISTER, - UPROBE_FILTER_UNREGISTER, - UPROBE_FILTER_MMAP, -}; - struct uprobe_consumer { int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); int (*ret_handler)(struct uprobe_consumer *self, unsigned long func, struct pt_regs *regs); - bool (*filter)(struct uprobe_consumer *self, - enum uprobe_filter_ctx ctx, - struct mm_struct *mm); + bool (*filter)(struct uprobe_consumer *self, struct mm_struct *mm); struct uprobe_consumer *next; }; diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 3e3595753e2c..8bdcdc6901b2 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -918,21 +918,19 @@ static int prepare_uprobe(struct uprobe *uprobe, struct file *file, return ret; } -static inline bool consumer_filter(struct uprobe_consumer *uc, - enum uprobe_filter_ctx ctx, struct mm_struct *mm) +static inline bool consumer_filter(struct uprobe_consumer *uc, struct mm_struct *mm) { - return !uc->filter || uc->filter(uc, ctx, mm); + return !uc->filter || uc->filter(uc, mm); } -static bool filter_chain(struct uprobe *uprobe, - enum uprobe_filter_ctx ctx, struct mm_struct *mm) +static bool filter_chain(struct uprobe *uprobe, struct mm_struct *mm) { struct uprobe_consumer *uc; bool ret = false; down_read(&uprobe->consumer_rwsem); for (uc = uprobe->consumers; uc; uc = uc->next) { - ret = consumer_filter(uc, ctx, mm); + ret = consumer_filter(uc, mm); if (ret) break; } @@ -1099,12 +1097,10 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new) if (is_register) { /* consult only the "caller", new consumer. */ - if (consumer_filter(new, - UPROBE_FILTER_REGISTER, mm)) + if (consumer_filter(new, mm)) err = install_breakpoint(uprobe, mm, vma, info->vaddr); } else if (test_bit(MMF_HAS_UPROBES, &mm->flags)) { - if (!filter_chain(uprobe, - UPROBE_FILTER_UNREGISTER, mm)) + if (!filter_chain(uprobe, mm)) err |= remove_breakpoint(uprobe, mm, info->vaddr); } @@ -1387,7 +1383,7 @@ int uprobe_mmap(struct vm_area_struct *vma) */ list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) { if (!fatal_signal_pending(current) && - filter_chain(uprobe, UPROBE_FILTER_MMAP, vma->vm_mm)) { + filter_chain(uprobe, vma->vm_mm)) { unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset); install_breakpoint(uprobe, vma->vm_mm, vma, vaddr); } diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 4e391daafa64..73c570b5988b 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -3320,8 +3320,7 @@ static int uprobe_prog_run(struct bpf_uprobe *uprobe, } static bool -uprobe_multi_link_filter(struct uprobe_consumer *con, enum uprobe_filter_ctx ctx, - struct mm_struct *mm) +uprobe_multi_link_filter(struct uprobe_consumer *con, struct mm_struct *mm) { struct bpf_uprobe *uprobe; diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 52e76a73fa7c..7eb79e0a5352 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -1078,9 +1078,7 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e return trace_handle_return(s); } -typedef bool (*filter_func_t)(struct uprobe_consumer *self, - enum uprobe_filter_ctx ctx, - struct mm_struct *mm); +typedef bool (*filter_func_t)(struct uprobe_consumer *self, struct mm_struct *mm); static int trace_uprobe_enable(struct trace_uprobe *tu, filter_func_t filter) { @@ -1339,8 +1337,7 @@ static int uprobe_perf_open(struct trace_event_call *call, return err; } -static bool uprobe_perf_filter(struct uprobe_consumer *uc, - enum uprobe_filter_ctx ctx, struct mm_struct *mm) +static bool uprobe_perf_filter(struct uprobe_consumer *uc, struct mm_struct *mm) { struct trace_uprobe_filter *filter; struct trace_uprobe *tu; @@ -1426,7 +1423,7 @@ static void __uprobe_perf_func(struct trace_uprobe *tu, static int uprobe_perf_func(struct trace_uprobe *tu, struct pt_regs *regs, struct uprobe_cpu_buffer **ucbp) { - if (!uprobe_perf_filter(&tu->consumer, 0, current->mm)) + if (!uprobe_perf_filter(&tu->consumer, current->mm)) return UPROBE_HANDLER_REMOVE; if (!is_ret_probe(tu))