From patchwork Tue Nov 17 15:57:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Szymon Janc X-Patchwork-Id: 11912575 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD80FC56202 for ; Tue, 17 Nov 2020 15:57:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59DAD2465E for ; Tue, 17 Nov 2020 15:57:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=codecoup-pl.20150623.gappssmtp.com header.i=@codecoup-pl.20150623.gappssmtp.com header.b="AsneKCkC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726823AbgKQP5K (ORCPT ); Tue, 17 Nov 2020 10:57:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726822AbgKQP5J (ORCPT ); Tue, 17 Nov 2020 10:57:09 -0500 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B667C0613CF for ; Tue, 17 Nov 2020 07:57:09 -0800 (PST) Received: by mail-lf1-x12a.google.com with SMTP id s30so30802596lfc.4 for ; Tue, 17 Nov 2020 07:57:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codecoup-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qZr1CDpsxkc0EtTeIWjg8oXT7/DV+Tesw82XN3N59Y8=; b=AsneKCkCgXXof2+1Y2aqdvEv2nocv7idshizTTw2WXElrue5y0ceQexxsJWsJjyNeA VCCdY3KUps5jiHSDcQqzIGR7EJ8q5QTOZlyw2sJmUQagL6cHzfDX+Gwfdil/JBNSZZz6 feJ1tfiSqjBnmA1gCV9ZWO2m74cFMQ8LEW5cO4fM2iftIBvqy0j4rp8VQu8fpQAIs5oc McmmIK3mKjTeacGuCKunSdORtiqQmiD5/fy0UNPpuNyj6RmvwZali87NDk4CdDNcQfxx iUYUogddQ+ZggyxVa3ZGtK0K4LJg5Wp0WaN4BAednanPFyy0x/yCA7ekakKQlQFU71s4 jq5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qZr1CDpsxkc0EtTeIWjg8oXT7/DV+Tesw82XN3N59Y8=; b=c6LphzJ5CBY4Sc/k1yDcE1iw24DMlMRi8FrX1cGkNGPDr4eaz9XFbmS9BuloQCgkWL 1VcBNlK0MqnqkB1rDnoqNbJi5NgwtSn57+BrnJKXci3foaS9okD13arcDW2nXK7IMUb8 qGdD4vCgfFLV6+ryIUaIiLdKRB9wAM0uBmJakmDPcpQH3hneMyYNp/TQlX+EHzyWPWm4 hH5+bMZHRk+7VuzFaKwBpFS28HNr1XeduI1JwlwMkwAsqzy3IdDsMwWph24PlCP0DFUV GWMOZR+9SyNXvUlFIj/CM78cWRfACMkiJ7b9Tu1j6htYfyoQQiRj4hf5b/8zWVbSnxWo f1gg== X-Gm-Message-State: AOAM530q2wNlYTuw4kAsRx8Y8IOH45lrn/zKkMgEl7uMNUkuskzq88+R UJsOUxkrr0NimdoF/dlAB/cSOTiAaZkmYA== X-Google-Smtp-Source: ABdhPJxWMXKGrnPqEwW8nI25WrNoh3iI2yzFDEacapO88yDKr4Alk7rut62OvJzARQdlvsSLwAxFhA== X-Received: by 2002:ac2:44ac:: with SMTP id c12mr2169378lfm.602.1605628626998; Tue, 17 Nov 2020 07:57:06 -0800 (PST) Received: from ix.codecoup.local ([95.143.243.62]) by smtp.gmail.com with ESMTPSA id v9sm3192366lfd.287.2020.11.17.07.57.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Nov 2020 07:57:05 -0800 (PST) From: Szymon Janc To: linux-bluetooth@vger.kernel.org Cc: Szymon Janc Subject: [PATCH] device: Update cache only if content changed Date: Tue, 17 Nov 2020 16:57:03 +0100 Message-Id: <20201117155703.30268-1-szymon.janc@codecoup.pl> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This fix hammering storage device (eg sdcard) when doing scanning and LE devices are around. --- src/device.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/src/device.c b/src/device.c index 2800b276a..cf4226f42 100644 --- a/src/device.c +++ b/src/device.c @@ -509,7 +509,9 @@ void device_store_cached_name(struct btd_device *dev, const char *name) char d_addr[18]; GKeyFile *key_file; char *data; + char *data_old; gsize length = 0; + gsize length_old = 0; if (device_address_is_private(dev)) { DBG("Can't store name for private addressed device %s", @@ -524,11 +526,17 @@ void device_store_cached_name(struct btd_device *dev, const char *name) key_file = g_key_file_new(); g_key_file_load_from_file(key_file, filename, 0, NULL); + data_old = g_key_file_to_data(key_file, &length_old, NULL); + g_key_file_set_string(key_file, "General", "Name", name); data = g_key_file_to_data(key_file, &length, NULL); - g_file_set_contents(filename, data, length, NULL); + + if ((length != length_old) || (memcmp(data, data_old, length))) + g_file_set_contents(filename, data, length, NULL); + g_free(data); + g_free(data_old); g_key_file_free(key_file); }