From patchwork Sat Feb 20 22:46:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 8368001 Return-Path: X-Original-To: patchwork-linux-nvdimm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 47D10C0553 for ; Sat, 20 Feb 2016 22:47:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4109D203B0 for ; Sat, 20 Feb 2016 22:47:09 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 599B5203AB for ; Sat, 20 Feb 2016 22:47:08 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 1B42E1A1EDD; Sat, 20 Feb 2016 14:47:09 -0800 (PST) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by ml01.01.org (Postfix) with ESMTP id 14CA01A1EDD for ; Sat, 20 Feb 2016 14:47:08 -0800 (PST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 20 Feb 2016 14:47:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,478,1449561600"; d="scan'208";a="920260688" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.136]) by fmsmga002.fm.intel.com with ESMTP; 20 Feb 2016 14:47:07 -0800 Subject: [PATCH 1/2] libnvdimm, tools/testing/nvdimm: fix 'ars_status' output buffer sizing From: Dan Williams To: linux-nvdimm@lists.01.org Date: Sat, 20 Feb 2016 14:46:43 -0800 Message-ID: <20160220224643.20667.43436.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <20160220224637.20667.84618.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20160220224637.20667.84618.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Cc: linux-acpi@vger.kernel.org, stable@vger.kernel.org X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Use the output length specified in the command to size the receive buffer rather than the arbitrary 4K limit. This bug was hiding the fact that the ndctl implementation of ndctl_bus_cmd_new_ars_status() was not specifying an output buffer size. Cc: Signed-off-by: Dan Williams --- drivers/nvdimm/bus.c | 8 ++++---- include/linux/libnvdimm.h | 1 - tools/testing/nvdimm/test/nfit.c | 8 ++++++-- 3 files changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 7e2c43f701bc..99953b34fa1d 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -392,8 +392,8 @@ static const struct nd_cmd_desc __nd_cmd_bus_descs[] = { .out_sizes = { 4, }, }, [ND_CMD_ARS_STATUS] = { - .out_num = 2, - .out_sizes = { 4, UINT_MAX, }, + .out_num = 3, + .out_sizes = { 4, 4, UINT_MAX, }, }, }; @@ -442,8 +442,8 @@ u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd, return in_field[1]; else if (nvdimm && cmd == ND_CMD_VENDOR && idx == 2) return out_field[1]; - else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 1) - return ND_CMD_ARS_STATUS_MAX; + else if (!nvdimm && cmd == ND_CMD_ARS_STATUS && idx == 2) + return out_field[1] - 8; return UINT_MAX; } diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index bed40dff0e86..c736382fd260 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -28,7 +28,6 @@ enum { ND_IOCTL_MAX_BUFLEN = SZ_4M, ND_CMD_MAX_ELEM = 4, ND_CMD_MAX_ENVELOPE = 16, - ND_CMD_ARS_STATUS_MAX = SZ_4K, ND_MAX_MAPPINGS = 32, /* region flag indicating to direct-map persistent memory by default */ diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c index 90bd2ea41032..b3281dcd4a5d 100644 --- a/tools/testing/nvdimm/test/nfit.c +++ b/tools/testing/nvdimm/test/nfit.c @@ -217,13 +217,16 @@ static int nfit_test_cmd_set_config_data(struct nd_cmd_set_config_hdr *nd_cmd, return rc; } +#define NFIT_TEST_ARS_RECORDS 4 + static int nfit_test_cmd_ars_cap(struct nd_cmd_ars_cap *nd_cmd, unsigned int buf_len) { if (buf_len < sizeof(*nd_cmd)) return -EINVAL; - nd_cmd->max_ars_out = 256; + nd_cmd->max_ars_out = sizeof(struct nd_cmd_ars_status) + + NFIT_TEST_ARS_RECORDS * sizeof(struct nd_ars_record); nd_cmd->status = (ND_ARS_PERSISTENT | ND_ARS_VOLATILE) << 16; return 0; @@ -246,7 +249,8 @@ static int nfit_test_cmd_ars_status(struct nd_cmd_ars_status *nd_cmd, if (buf_len < sizeof(*nd_cmd)) return -EINVAL; - nd_cmd->out_length = 256; + nd_cmd->out_length = sizeof(struct nd_cmd_ars_status); + /* TODO: emit error records */ nd_cmd->num_records = 0; nd_cmd->address = 0; nd_cmd->length = -1ULL;