From: Tomas Henzl <thenzl@redhat.com> Date: Sun, 29 Aug 2010 15:49:27 -0400 Subject: [block] cciss: add lunid attribute to log drives in /sys Message-id: <1283097002-3341-29-git-send-email-thenzl@redhat.com> Patchwork-id: 27875 O-Subject: [RHEL6 PATCH 28/63] cciss: Add lunid attribute to log drives in /sys Bugzilla: 568830 RH-Acked-by: Neil Horman <nhorman@redhat.com> Add lunid attribute to logical drives in sysfs diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 8436470..de6ae68 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -578,11 +578,38 @@ static ssize_t dev_show_rev(struct device *dev, } DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL); +static ssize_t cciss_show_lunid(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; + unsigned char lunid[8]; + + spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags); + if (h->busy_configuring) { + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return -EBUSY; + } + if (!drv->heads) { + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return -ENOTTY; + } + memcpy(lunid, drv->LunID, sizeof(lunid)); + spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); + return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", + lunid[0], lunid[1], lunid[2], lunid[3], + lunid[4], lunid[5], lunid[6], lunid[7]); + +} +DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL); + struct device_attribute *cciss_dev_attrs[] = { &dev_attr_unique_id, &dev_attr_vendor, &dev_attr_model, &dev_attr_rev, + &dev_attr_lunid, NULL, };