[PATCH] RDMA/core: Publish node GUID with the uevent for ib_device

Abhinav Jain
2025-03-09T17:57:55Z

As per the comment, modify ib_device_uevent to publish the node
GUID alongside device name, upon device state change.

Have compiled the file manually to ensure that it builds. Do not have
a readily available IB hardware to test. Confirmed with checkpatch
that the patch has no errors/warnings.

Signed-off-by: Abhinav Jain <jain.abhinav177@gmail.com>
---
drivers/infiniband/core/device.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 0ded91f056f3..1812038f1a91 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -499,12 +499,17 @@ static void ib_device_release(struct device *device)
static int ib_device_uevent(const struct device *device,
struct kobj_uevent_env *env)
{
- if (add_uevent_var(env, "NAME=%s", dev_name(device)))
+ const struct ib_device *dev =
+ container_of(device, struct ib_device, dev);
+
+ if (add_uevent_var(env, "NAME=%s", dev_name(&dev->dev)))
return -ENOMEM;

- /*
- * It would be nice to pass the node GUID with the event...
- */
+ __be64 node_guid_be = dev->node_guid;
+ u64 node_guid = be64_to_cpu(node_guid_be);
+
+ if (add_uevent_var(env, "NODE_GUID=0x%llx", node_guid))
+ return -ENOMEM;

return 0;
}
--
2.34.1