Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760328AbZIQSsE (ORCPT ); Thu, 17 Sep 2009 14:48:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760284AbZIQSsA (ORCPT ); Thu, 17 Sep 2009 14:48:00 -0400 Received: from g5t0006.atlanta.hp.com ([15.192.0.43]:27514 "EHLO g5t0006.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760274AbZIQSr5 (ORCPT ); Thu, 17 Sep 2009 14:47:57 -0400 From: "Stephen M. Cameron" Subject: [PATCH 19/20] cciss: Add usage_count attribute to each logical drive in /sys To: akpm@linux-foundation.org, axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, andrew.patterson@hp.com, mikem@beardog.cce.hp.com, scameron@beardog.cce.hp.com Date: Thu, 17 Sep 2009 13:48:26 -0500 Message-ID: <20090917184826.15105.47523.stgit@beardog.cce.hp.com> In-Reply-To: <20090917184310.15105.43508.stgit@beardog.cce.hp.com> References: <20090917184310.15105.43508.stgit@beardog.cce.hp.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2541 Lines: 71 Add usage_count attribute to each logical drive at /sys/devices//ccissX/cXdY/usage_count for controller X, logical drive Y. The usage count is the number of times the device has currently been opened. Signed-off-by: Stephen M. Cameron --- .../ABI/testing/sysfs-bus-pci-devices-cciss | 7 +++++++ drivers/block/cciss.c | 20 ++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss index 8d02602..4f29e5f 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss @@ -52,3 +52,10 @@ Kernel Version: 2.6.31 Contact: iss_storagedev@hp.com Description: Displays the RAID level of logical drive Y of controller X. + +Where: /sys/bus/pci/devices//ccissX/cXdY/usage_count +Date: August 2009 +Kernel Version: 2.6.31 +Contact: iss_storagedev@hp.com +Description: Displays the usage count (number of opens) of logical drive Y + of controller X. diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index dc3461e..f3f30c5 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -625,6 +625,25 @@ static ssize_t cciss_show_raid_level(struct device *dev, } DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL); +static ssize_t cciss_show_usage_count(struct device *dev, + struct device_attribute *attr, char *buf) +{ + drive_info_struct *drv = dev_get_drvdata(dev); + struct ctlr_info *h = to_hba(drv->dev->parent); + unsigned long flags; + int count; + + spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); + if (h->busy_configuring) { + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return -EBUSY; + } + count = drv->usage_count; + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return snprintf(buf, 20, "%d\n", count); +} +DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL); + static struct attribute *cciss_host_attrs[] = { &dev_attr_rescan.attr, NULL @@ -652,6 +671,7 @@ static struct attribute *cciss_dev_attrs[] = { &dev_attr_rev.attr, &dev_attr_lunid.attr, &dev_attr_raid_level.attr, + &dev_attr_usage_count.attr, NULL }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/