From c5bcbbb9fe00128d500c2f473d5ddc8d8c2c53a7 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Thu, 2 Feb 2006 09:47:14 -0800 Subject: [PATCH] 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 Signed-off-by: Roland Dreier --- drivers/infiniband/core/sysfs.c | 30 +++++++++++++++++++++++++++++- include/rdma/ib_verbs.h | 5 ++++- 2 files changed, 33 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c index 5982d687a0..49601bb847 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 = { diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 38fa6c082e..1d31c8cd5c 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -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; -- 2.39.5