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IB: Allow userspace to set node description

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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>
This commit is contained in:
Roland Dreier 2006-02-02 09:47:14 -08:00
parent 2fa5e2ebbe
commit c5bcbbb9fe
2 changed files with 33 additions and 2 deletions
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30
drivers/infiniband/core/sysfs.c
View File

@ -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 = {

5
include/rdma/ib_verbs.h
View File

@ -222,11 +222,13 @@ struct ib_port_attr {
};
enum ib_device_modify_flags {
IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1
IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
IB_DEVICE_MODIFY_NODE_DESC = 1 << 1
};
struct ib_device_modify {
u64 sys_image_guid;
char node_desc[64];
};
enum ib_port_modify_flags {
@ -951,6 +953,7 @@ struct ib_device {
u64 uverbs_cmd_mask;
int uverbs_abi_ver;
char node_desc[64];
__be64 node_guid;
u8 node_type;
u8 phys_port_cnt;