From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B635A288CA0 for ; Tue, 6 May 2025 16:48:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550128; cv=none; b=fHpUmdN4LHf8wp6G1LbHWacg16FmsN9Pd4LPU5WHu2Xzagb5bVziy77We9nv6km/vemQnGNC62MrUYqH+hy3Wh6UqElgGSXgxsUYMwNSVgOtkgB6G5tQLb9RPSwxE14MuJETgqCagddS8b39MGwGybkuT2CPtttlsgeUNMtU8nA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550128; c=relaxed/simple; bh=l3cyRuYF81wunoJ7TifMvH83r4i55FQixMLbcy3lwME=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ono2+NjSnqKyHdlLaC/EEg7RTlE/1vkCMe3dvHkNcR+PlVCWt1TKTxlFI3zGtmjBENrK9D5hX/mp6egH2rjIYCRBuBHa3gvvOYHxewPdZ/lhynF8H6898rMkaJ/gSppTDjkNuK8QY7UOrY8os7UtWihuQuCZZpsD9VhbylftX+E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=RE/y0T3O; arc=none smtp.client-ip=209.85.221.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="RE/y0T3O" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-39141ffa913so2911726f8f.2 for ; Tue, 06 May 2025 09:48:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1746550125; x=1747154925; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ulR0t05oQC1aYq/PHkhH5FZiwJoFyTXIHcnk/CuN1Ys=; b=RE/y0T3OQ/eziv7mmJ0MwguaDxQ6HlPabzAzPBhc2ofZynkJWaWPnyApioLxuzTf8T FHorYK9j5HiZX1ibqzQKHABbWiUsAYChHQ84bl/otbUKlZN1GxaYx2/JSKCrjDtKMHe8 //2rO8mbarHzUK9DkvjsrZFUu/7mdq8tqQDBq+oQcvdLrT1hlxGFKxb0+uXeQuYWDuTx P2eQXDbveBtGY2HeIxkOxWayG+0ZjwxmJjgaPz+QeIfP+vCuYZPj05hQgRmmPTP+ud62 Kp+ai53MleOXaxnkT6Xp1XoFkV3jTcghvjEToPAbMZg1kdzVpwR4fuZKhIRwR9e3JnHX kNFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746550125; x=1747154925; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ulR0t05oQC1aYq/PHkhH5FZiwJoFyTXIHcnk/CuN1Ys=; b=ZkHamGYcyfBdX768mJm6yDXK420kB98TLY2ceROcl6vUGHhUmW/C55r5wvJXmJ9Cvg hssh3lC/nhBPLuIeQlTLsuHyJBilt5bx/QM3DbyJXsuTeIhcpRBw71iMbxPmwpdUmv2m G+5Ot/NyHNOkHBQWXJD/feW4DWppsM2UPKZL3LAzHNHjm5BzcWFtPnzxhb1hiqWX8e6b DqX0Rc3+do7tLKJf6T3I28LCPiQjXNth0uhE06l9dRrxtrj+sEpAKEO8QXB93WERzIOG Ej7GRj4aW4nwZoPGriiW9c6itoy6FYVvYOaRfCttLJMMM7cjbjsjsusKJy+AKLWNci6+ aLyA== X-Forwarded-Encrypted: i=1; AJvYcCUemyzDCbNcsdvZv2YrGuPBxRwkxhIBZp5xm+/w43iV6bm5qmalfVylkVAjDyEgt5HOswdbsdDknsVfxMY=@vger.kernel.org X-Gm-Message-State: AOJu0YxcCzEU7wpRORjzmOyd60X51C0PCqHUlK4gexgX2QdBKK4InvjO f528mWXRiqkiU6uIu0RKkVMaJCRz945BDQCv6X34YtwS5x6aUR/cJOEm8Cnpgd+jK0bCsb6T5lM HtBoKfkfe8CMwNVeDjQ== X-Google-Smtp-Source: AGHT+IG1v09/s12usa8mhNe5u/61861N0/kCY4NkyY380pXa7lF6ETtkjTMmugXHCVnG7wZDISxXe9P8kKhSjb56 X-Received: from wrbbs23.prod.google.com ([2002:a05:6000:717:b0:3a0:90bc:bf72]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a5d:47c7:0:b0:3a0:8352:775a with SMTP id ffacd0b85a97d-3a0b49b5e48mr195832f8f.34.1746550125284; Tue, 06 May 2025 09:48:45 -0700 (PDT) Date: Tue, 6 May 2025 17:48:00 +0100 In-Reply-To: <20250506164820.515876-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250506164820.515876-1-vdonnefort@google.com> X-Mailer: git-send-email 2.49.0.967.g6a0df3ecc3-goog Message-ID: <20250506164820.515876-5-vdonnefort@google.com> Subject: [PATCH v4 04/24] tracing: Add init callback to trace remotes From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" Add a .init call back so the trace remote callers can add entries to the tracefs directory. Signed-off-by: Vincent Donnefort diff --git a/include/linux/trace_remote.h b/include/linux/trace_remote.h index 1aa99da3c96a..82d26d97a536 100644 --- a/include/linux/trace_remote.h +++ b/include/linux/trace_remote.h @@ -3,9 +3,11 @@ #ifndef _LINUX_TRACE_REMOTE_H #define _LINUX_TRACE_REMOTE_H +#include #include struct trace_remote_callbacks { + int (*init)(struct dentry *d, void *priv); struct trace_buffer_desc * (*load_trace_buffer)(unsigned long size, void *priv); void (*unload_trace_buffer)(struct trace_buffer_desc *desc, void *priv); diff --git a/kernel/trace/trace_remote.c b/kernel/trace/trace_remote.c index 2221705f65f4..6f4b921f6955 100644 --- a/kernel/trace/trace_remote.c +++ b/kernel/trace/trace_remote.c @@ -479,6 +479,7 @@ static int trace_remote_init_tracefs(const char *name, struct trace_remote *remo int trace_remote_register(const char *name, struct trace_remote_callbacks *cbs, void *priv) { struct trace_remote *remote; + int ret; remote = kzalloc(sizeof(*remote), GFP_KERNEL); if (!remote) @@ -495,7 +496,11 @@ int trace_remote_register(const char *name, struct trace_remote_callbacks *cbs, return -ENOMEM; } - return 0; + ret = cbs->init ? cbs->init(remote->dentry, priv) : 0; + if (ret) + pr_err("Init failed for trace remote '%s' (%d)\n", name, ret); + + return ret; } void trace_remote_free_buffer(struct trace_buffer_desc *desc) -- 2.49.0.967.g6a0df3ecc3-goog