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authorRoland Dreier <rolandd@cisco.com>2006-02-02 09:47:14 -0800
committerRoland Dreier <rolandd@cisco.com>2006-03-20 10:08:09 -0800
commitc5bcbbb9fe00128d500c2f473d5ddc8d8c2c53a7 (patch)
treec4a6feac1bc1dfd9e2fbe88c8e6ad1db4a47a817 /drivers/infiniband/core
parent2fa5e2ebbe2d81f741ba7bed9e07dc38cc734625 (diff)
IB: Allow userspace to set node description
Expose a writable "node_desc" sysfs attribute for InfiniBand devices. This allows userspace to update the node description with information such as the node's hostname, so that IB network management software can tie its view to the real world. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/core')
-rw-r--r--drivers/infiniband/core/sysfs.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 5982d687a00..49601bb8475 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -628,14 +628,42 @@ static ssize_t show_node_guid(struct class_device *cdev, char *buf)
be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
}
+static ssize_t show_node_desc(struct class_device *cdev, char *buf)
+{
+ struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
+
+ return sprintf(buf, "%.64s\n", dev->node_desc);
+}
+
+static ssize_t set_node_desc(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
+ struct ib_device_modify desc = {};
+ int ret;
+
+ if (!dev->modify_device)
+ return -EIO;
+
+ memcpy(desc.node_desc, buf, min_t(int, count, 64));
+ ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
static CLASS_DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);
static CLASS_DEVICE_ATTR(sys_image_guid, S_IRUGO, show_sys_image_guid, NULL);
static CLASS_DEVICE_ATTR(node_guid, S_IRUGO, show_node_guid, NULL);
+static CLASS_DEVICE_ATTR(node_desc, S_IRUGO | S_IWUSR, show_node_desc,
+ set_node_desc);
static struct class_device_attribute *ib_class_attributes[] = {
&class_device_attr_node_type,
&class_device_attr_sys_image_guid,
- &class_device_attr_node_guid
+ &class_device_attr_node_guid,
+ &class_device_attr_node_desc
};
static struct class ib_class = {