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>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 38fa6c082eae..1d31c8cd5ce0 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;