[PATCH net-next v4 01/13] devlink: expose devlink instance index over netlink
From: Jiri Pirko <jiri@resnulli.us>
Date: 2026-03-12 10:04:11
Also in:
linux-doc, linux-rdma, linux-trace-kernel
Subsystem:
devlink, networking [general], the rest, yaml netlink (ynl) · Maintainers:
Jiri Pirko, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Donald Hunter
From: Jiri Pirko <redacted> Each devlink instance has an internally assigned index used for xarray storage. Expose it as a new DEVLINK_ATTR_INDEX uint attribute alongside the existing bus_name and dev_name handle. Signed-off-by: Jiri Pirko <redacted> --- Documentation/netlink/specs/devlink.yaml | 5 +++++ include/uapi/linux/devlink.h | 2 ++ net/devlink/devl_internal.h | 2 ++ net/devlink/port.c | 1 + 4 files changed, 10 insertions(+)
diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml
index 837112da6738..1bed67a0eefb 100644
--- a/Documentation/netlink/specs/devlink.yaml
+++ b/Documentation/netlink/specs/devlink.yaml@@ -867,6 +867,10 @@ attribute-sets: type: flag doc: Request restoring parameter to its default value. value: 183 + - + name: index + type: uint + doc: Unique devlink instance index. - name: dl-dev-stats subset-of: devlink
@@ -1311,6 +1315,7 @@ operations: attributes: - bus-name - dev-name + - index - reload-failed - dev-stats dump:
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index e7d6b6d13470..1ba3436db4ae 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h@@ -642,6 +642,8 @@ enum devlink_attr { DEVLINK_ATTR_PARAM_VALUE_DEFAULT, /* dynamic */ DEVLINK_ATTR_PARAM_RESET_DEFAULT, /* flag */ + DEVLINK_ATTR_INDEX, /* uint */ + /* Add new attributes above here, update the spec in * Documentation/netlink/specs/devlink.yaml and re-generate * net/devlink/netlink_gen.c.
diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index 1377864383bc..31fa98af418e 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h@@ -178,6 +178,8 @@ devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) return -EMSGSIZE; if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) return -EMSGSIZE; + if (nla_put_uint(msg, DEVLINK_ATTR_INDEX, devlink->index)) + return -EMSGSIZE; return 0; }
diff --git a/net/devlink/port.c b/net/devlink/port.c
index 93d8a25bb920..1ff609571ea4 100644
--- a/net/devlink/port.c
+++ b/net/devlink/port.c@@ -222,6 +222,7 @@ size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port) return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */ + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */ + + nla_total_size(8) /* DEVLINK_ATTR_INDEX */ + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */ }
--
2.51.1