From patchwork Fri Mar 8 01:32:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 1053330 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44Fr2L61Rvz9s9N for ; Fri, 8 Mar 2019 12:46:34 +1100 (AEDT) Received: from localhost ([127.0.0.1]:34724 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h24am-00055B-Lm for incoming@patchwork.ozlabs.org; Thu, 07 Mar 2019 20:46:32 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59138) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h24QH-0004QU-3S for qemu-devel@nongnu.org; Thu, 07 Mar 2019 20:35:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h24QE-0003L8-7P for qemu-devel@nongnu.org; Thu, 07 Mar 2019 20:35:40 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41388) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h24Q9-0003Ae-VZ; Thu, 07 Mar 2019 20:35:35 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id F423B307DABB; Fri, 8 Mar 2019 01:35:32 +0000 (UTC) Received: from x1w.redhat.com (unknown [10.40.206.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C7B5860BE5; Fri, 8 Mar 2019 01:35:25 +0000 (UTC) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: Laszlo Ersek , Gerd Hoffmann , "Michael S. Tsirkin" , qemu-devel@nongnu.org Date: Fri, 8 Mar 2019 02:32:19 +0100 Message-Id: <20190308013222.12524-16-philmd@redhat.com> In-Reply-To: <20190308013222.12524-1-philmd@redhat.com> References: <20190308013222.12524-1-philmd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 08 Mar 2019 01:35:33 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 15/18] hw/nvram/fw_cfg: Add fw_cfg_add_file_from_host() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Thomas Huth , Eduardo Habkost , Mark Cave-Ayland , "Dr. David Alan Gilbert" , Markus Armbruster , qemu-arm@nongnu.org, qemu-ppc@nongnu.org, Igor Mammedov , Paolo Bonzini , David Gibson , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Artyom Tarasenko , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add a function to read the full content of file on the host, and add a new 'file' name item to the fw_cfg device. Signed-off-by: Philippe Mathieu-Daudé --- v2: s/ptr/data, corrected documentation (Laszlo) --- hw/nvram/fw_cfg.c | 21 +++++++++++++++++++++ include/hw/nvram/fw_cfg.h | 23 +++++++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index 4c82dcc125..a46a7c8f06 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -890,6 +890,27 @@ void fw_cfg_add_file(FWCfgState *s, const char *filename, fw_cfg_add_file_callback(s, filename, NULL, NULL, NULL, data, len, true); } +void *fw_cfg_add_file_from_host(FWCfgState *s, const char *filename, + const char *host_path, size_t *len) +{ + GError *gerr = NULL; + gchar *data = NULL; + gsize contents_len = 0; + + if (g_file_get_contents(host_path, &data, &contents_len, &gerr)) { + fw_cfg_add_file(s, filename, data, contents_len); + } else { + error_report("%s", gerr->message); + g_error_free(gerr); + return NULL; + } + if (len) { + *len = contents_len; + } + + return data; +} + void *fw_cfg_modify_file(FWCfgState *s, const char *filename, void *data, size_t len) { diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h index 5ac9adfe1f..75a29858dc 100644 --- a/include/hw/nvram/fw_cfg.h +++ b/include/hw/nvram/fw_cfg.h @@ -172,6 +172,29 @@ void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value); void fw_cfg_add_file(FWCfgState *s, const char *filename, void *data, size_t len); +/** + * fw_cfg_add_file_from_host: + * @s: fw_cfg device being modified + * @filename: name of new fw_cfg file item + * @host_path: path of the host file to read the data from + * @len: pointer to hold the length of the host file (optional) + * + * Read the content of a host file as a raw "blob" then add a new NAMED + * fw_cfg item of the file size. If @len is provided, it will contain the + * total length read from the host file. The data read from the host + * filesystem is owned by the new fw_cfg entry, and is stored into the data + * structure of the fw_cfg device. + * The next available (unused) selector key starting at FW_CFG_FILE_FIRST + * will be used; also, a new entry will be added to the file directory + * structure residing at key value FW_CFG_FILE_DIR, containing the item name, + * data size, and assigned selector key value. + * + * Returns: pointer to the newly allocated file content, or NULL if an error + * occured. The returned pointer must be freed with g_free(). + */ +void *fw_cfg_add_file_from_host(FWCfgState *s, const char *filename, + const char *host_path, size_t *len); + /** * fw_cfg_add_file_callback: * @s: fw_cfg device being modified