From patchwork Fri Mar 5 15:50:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 12118793 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 5A4F0C433E0 for ; Fri, 5 Mar 2021 15:51:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 175EA6508D for ; Fri, 5 Mar 2021 15:51:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229478AbhCEPul (ORCPT ); Fri, 5 Mar 2021 10:50:41 -0500 Received: from mga17.intel.com ([192.55.52.151]:33401 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229493AbhCEPuW (ORCPT ); Fri, 5 Mar 2021 10:50:22 -0500 IronPort-SDR: HgvwWkbWHkAj2xVP3ny1Wv+TCXvZbnfoB7n9aSWtI6DXMdTeEgaaplubXC2cqxldG+Kf1njffs RQ3xbWNO6F4Q== X-IronPort-AV: E=McAfee;i="6000,8403,9914"; a="167569134" X-IronPort-AV: E=Sophos;i="5.81,225,1610438400"; d="scan'208";a="167569134" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2021 07:50:21 -0800 IronPort-SDR: OKT7CrXr7n/3cP4uSvL3CJYMSuXWRllC6QvHqULYWpAC4rdiLbVxaRAIWwDNhZbZgAb3e/pFpj kABlFV6C3HHw== X-IronPort-AV: E=Sophos;i="5.81,225,1610438400"; d="scan'208";a="508096508" Received: from djiang5-desk3.ch.intel.com ([143.182.136.137]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2021 07:50:21 -0800 Subject: [PATCH v2] dmaengine: idxd: convert sprintf() to sysfs_emit() for all usages From: Dave Jiang To: vkoul@kernel.org Cc: dmaengine@vger.kernel.org Date: Fri, 05 Mar 2021 08:50:20 -0700 Message-ID: <161495936863.573579.5804720281778882171.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/0.23-29-ga622f1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Convert sprintf() to sysfs_emit() in order to check buffer overrun on sysfs outputs. Signed-off-by: Dave Jiang --- v2: - Fix sysfs_emit_at() calls to not hit -1 offset. drivers/dma/idxd/sysfs.c | 120 ++++++++++++++++++++++------------------------ 1 file changed, 57 insertions(+), 63 deletions(-) diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 21c1e23cdf23..ee0f4538cd3f 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -476,9 +476,9 @@ static ssize_t engine_group_id_show(struct device *dev, container_of(dev, struct idxd_engine, conf_dev); if (engine->group) - return sprintf(buf, "%d\n", engine->group->id); + return sysfs_emit(buf, "%d\n", engine->group->id); else - return sprintf(buf, "%d\n", -1); + return sysfs_emit(buf, "%d\n", -1); } static ssize_t engine_group_id_store(struct device *dev, @@ -560,7 +560,7 @@ static ssize_t group_tokens_reserved_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); - return sprintf(buf, "%u\n", group->tokens_reserved); + return sysfs_emit(buf, "%u\n", group->tokens_reserved); } static ssize_t group_tokens_reserved_store(struct device *dev, @@ -608,7 +608,7 @@ static ssize_t group_tokens_allowed_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); - return sprintf(buf, "%u\n", group->tokens_allowed); + return sysfs_emit(buf, "%u\n", group->tokens_allowed); } static ssize_t group_tokens_allowed_store(struct device *dev, @@ -653,7 +653,7 @@ static ssize_t group_use_token_limit_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); - return sprintf(buf, "%u\n", group->use_token_limit); + return sysfs_emit(buf, "%u\n", group->use_token_limit); } static ssize_t group_use_token_limit_store(struct device *dev, @@ -696,7 +696,6 @@ static ssize_t group_engines_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); int i, rc = 0; - char *tmp = buf; struct idxd_device *idxd = group->idxd; for (i = 0; i < idxd->max_engines; i++) { @@ -706,12 +705,13 @@ static ssize_t group_engines_show(struct device *dev, continue; if (engine->group->id == group->id) - rc += sprintf(tmp + rc, "engine%d.%d ", - idxd->id, engine->id); + rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id); } + if (!rc) + return 0; rc--; - rc += sprintf(tmp + rc, "\n"); + rc += sysfs_emit_at(buf, rc, "\n"); return rc; } @@ -725,7 +725,6 @@ static ssize_t group_work_queues_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); int i, rc = 0; - char *tmp = buf; struct idxd_device *idxd = group->idxd; for (i = 0; i < idxd->max_wqs; i++) { @@ -735,12 +734,13 @@ static ssize_t group_work_queues_show(struct device *dev, continue; if (wq->group->id == group->id) - rc += sprintf(tmp + rc, "wq%d.%d ", - idxd->id, wq->id); + rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id); } + if (!rc) + return 0; rc--; - rc += sprintf(tmp + rc, "\n"); + rc += sysfs_emit_at(buf, rc, "\n"); return rc; } @@ -755,7 +755,7 @@ static ssize_t group_traffic_class_a_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); - return sprintf(buf, "%d\n", group->tc_a); + return sysfs_emit(buf, "%d\n", group->tc_a); } static ssize_t group_traffic_class_a_store(struct device *dev, @@ -796,7 +796,7 @@ static ssize_t group_traffic_class_b_show(struct device *dev, struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); - return sprintf(buf, "%d\n", group->tc_b); + return sysfs_emit(buf, "%d\n", group->tc_b); } static ssize_t group_traffic_class_b_store(struct device *dev, @@ -856,7 +856,7 @@ static ssize_t wq_clients_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%d\n", wq->client_count); + return sysfs_emit(buf, "%d\n", wq->client_count); } static struct device_attribute dev_attr_wq_clients = @@ -869,12 +869,12 @@ static ssize_t wq_state_show(struct device *dev, switch (wq->state) { case IDXD_WQ_DISABLED: - return sprintf(buf, "disabled\n"); + return sysfs_emit(buf, "disabled\n"); case IDXD_WQ_ENABLED: - return sprintf(buf, "enabled\n"); + return sysfs_emit(buf, "enabled\n"); } - return sprintf(buf, "unknown\n"); + return sysfs_emit(buf, "unknown\n"); } static struct device_attribute dev_attr_wq_state = @@ -886,9 +886,9 @@ static ssize_t wq_group_id_show(struct device *dev, struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); if (wq->group) - return sprintf(buf, "%u\n", wq->group->id); + return sysfs_emit(buf, "%u\n", wq->group->id); else - return sprintf(buf, "-1\n"); + return sysfs_emit(buf, "-1\n"); } static ssize_t wq_group_id_store(struct device *dev, @@ -940,8 +940,7 @@ static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%s\n", - wq_dedicated(wq) ? "dedicated" : "shared"); + return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared"); } static ssize_t wq_mode_store(struct device *dev, @@ -977,7 +976,7 @@ static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", wq->size); + return sysfs_emit(buf, "%u\n", wq->size); } static int total_claimed_wq_size(struct idxd_device *idxd) @@ -1028,7 +1027,7 @@ static ssize_t wq_priority_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", wq->priority); + return sysfs_emit(buf, "%u\n", wq->priority); } static ssize_t wq_priority_store(struct device *dev, @@ -1065,8 +1064,7 @@ static ssize_t wq_block_on_fault_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", - test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags)); + return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags)); } static ssize_t wq_block_on_fault_store(struct device *dev, @@ -1105,7 +1103,7 @@ static ssize_t wq_threshold_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", wq->threshold); + return sysfs_emit(buf, "%u\n", wq->threshold); } static ssize_t wq_threshold_store(struct device *dev, @@ -1148,15 +1146,12 @@ static ssize_t wq_type_show(struct device *dev, switch (wq->type) { case IDXD_WQT_KERNEL: - return sprintf(buf, "%s\n", - idxd_wq_type_names[IDXD_WQT_KERNEL]); + return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]); case IDXD_WQT_USER: - return sprintf(buf, "%s\n", - idxd_wq_type_names[IDXD_WQT_USER]); + return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]); case IDXD_WQT_NONE: default: - return sprintf(buf, "%s\n", - idxd_wq_type_names[IDXD_WQT_NONE]); + return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]); } return -EINVAL; @@ -1197,7 +1192,7 @@ static ssize_t wq_name_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%s\n", wq->name); + return sysfs_emit(buf, "%s\n", wq->name); } static ssize_t wq_name_store(struct device *dev, @@ -1233,7 +1228,7 @@ static ssize_t wq_cdev_minor_show(struct device *dev, { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%d\n", wq->idxd_cdev.minor); + return sysfs_emit(buf, "%d\n", wq->idxd_cdev.minor); } static struct device_attribute dev_attr_wq_cdev_minor = @@ -1259,7 +1254,7 @@ static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attri { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%llu\n", wq->max_xfer_bytes); + return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes); } static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr, @@ -1293,7 +1288,7 @@ static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribut { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", wq->max_batch_size); + return sysfs_emit(buf, "%u\n", wq->max_batch_size); } static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr, @@ -1326,7 +1321,7 @@ static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute * { struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); - return sprintf(buf, "%u\n", wq->ats_dis); + return sysfs_emit(buf, "%u\n", wq->ats_dis); } static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr, @@ -1389,7 +1384,7 @@ static ssize_t version_show(struct device *dev, struct device_attribute *attr, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%#x\n", idxd->hw.version); + return sysfs_emit(buf, "%#x\n", idxd->hw.version); } static DEVICE_ATTR_RO(version); @@ -1400,7 +1395,7 @@ static ssize_t max_work_queues_size_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_wq_size); + return sysfs_emit(buf, "%u\n", idxd->max_wq_size); } static DEVICE_ATTR_RO(max_work_queues_size); @@ -1410,7 +1405,7 @@ static ssize_t max_groups_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_groups); + return sysfs_emit(buf, "%u\n", idxd->max_groups); } static DEVICE_ATTR_RO(max_groups); @@ -1420,7 +1415,7 @@ static ssize_t max_work_queues_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_wqs); + return sysfs_emit(buf, "%u\n", idxd->max_wqs); } static DEVICE_ATTR_RO(max_work_queues); @@ -1430,7 +1425,7 @@ static ssize_t max_engines_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_engines); + return sysfs_emit(buf, "%u\n", idxd->max_engines); } static DEVICE_ATTR_RO(max_engines); @@ -1440,7 +1435,7 @@ static ssize_t numa_node_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); + return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); } static DEVICE_ATTR_RO(numa_node); @@ -1450,7 +1445,7 @@ static ssize_t max_batch_size_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_batch_size); + return sysfs_emit(buf, "%u\n", idxd->max_batch_size); } static DEVICE_ATTR_RO(max_batch_size); @@ -1461,7 +1456,7 @@ static ssize_t max_transfer_size_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%llu\n", idxd->max_xfer_bytes); + return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes); } static DEVICE_ATTR_RO(max_transfer_size); @@ -1471,7 +1466,7 @@ static ssize_t op_cap_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%#llx\n", idxd->hw.opcap.bits[0]); + return sysfs_emit(buf, "%#llx\n", idxd->hw.opcap.bits[0]); } static DEVICE_ATTR_RO(op_cap); @@ -1481,7 +1476,7 @@ static ssize_t gen_cap_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%#llx\n", idxd->hw.gen_cap.bits); + return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits); } static DEVICE_ATTR_RO(gen_cap); @@ -1491,8 +1486,7 @@ static ssize_t configurable_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", - test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); + return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); } static DEVICE_ATTR_RO(configurable); @@ -1512,7 +1506,7 @@ static ssize_t clients_show(struct device *dev, } spin_unlock_irqrestore(&idxd->dev_lock, flags); - return sprintf(buf, "%d\n", count); + return sysfs_emit(buf, "%d\n", count); } static DEVICE_ATTR_RO(clients); @@ -1522,7 +1516,7 @@ static ssize_t pasid_enabled_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", device_pasid_enabled(idxd)); + return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd)); } static DEVICE_ATTR_RO(pasid_enabled); @@ -1535,14 +1529,14 @@ static ssize_t state_show(struct device *dev, switch (idxd->state) { case IDXD_DEV_DISABLED: case IDXD_DEV_CONF_READY: - return sprintf(buf, "disabled\n"); + return sysfs_emit(buf, "disabled\n"); case IDXD_DEV_ENABLED: - return sprintf(buf, "enabled\n"); + return sysfs_emit(buf, "enabled\n"); case IDXD_DEV_HALTED: - return sprintf(buf, "halted\n"); + return sysfs_emit(buf, "halted\n"); } - return sprintf(buf, "unknown\n"); + return sysfs_emit(buf, "unknown\n"); } static DEVICE_ATTR_RO(state); @@ -1556,10 +1550,10 @@ static ssize_t errors_show(struct device *dev, spin_lock_irqsave(&idxd->dev_lock, flags); for (i = 0; i < 4; i++) - out += sprintf(buf + out, "%#018llx ", idxd->sw_err.bits[i]); + out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]); spin_unlock_irqrestore(&idxd->dev_lock, flags); out--; - out += sprintf(buf + out, "\n"); + out += sysfs_emit_at(buf, out, "\n"); return out; } static DEVICE_ATTR_RO(errors); @@ -1570,7 +1564,7 @@ static ssize_t max_tokens_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->max_tokens); + return sysfs_emit(buf, "%u\n", idxd->max_tokens); } static DEVICE_ATTR_RO(max_tokens); @@ -1580,7 +1574,7 @@ static ssize_t token_limit_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->token_limit); + return sysfs_emit(buf, "%u\n", idxd->token_limit); } static ssize_t token_limit_store(struct device *dev, @@ -1619,7 +1613,7 @@ static ssize_t cdev_major_show(struct device *dev, struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%u\n", idxd->major); + return sysfs_emit(buf, "%u\n", idxd->major); } static DEVICE_ATTR_RO(cdev_major); @@ -1628,7 +1622,7 @@ static ssize_t cmd_status_show(struct device *dev, { struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); - return sprintf(buf, "%#x\n", idxd->cmd_status); + return sysfs_emit(buf, "%#x\n", idxd->cmd_status); } static DEVICE_ATTR_RO(cmd_status);