[PATCH net-next v4 07/13] devlink: introduce __devlink_alloc() with dev driver pointer
From: Jiri Pirko <jiri@resnulli.us>
Date: 2026-03-12 10:04:19
Also in:
linux-doc, linux-rdma, linux-trace-kernel
Subsystem:
devlink, networking [general], the rest · Maintainers:
Jiri Pirko, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Jiri Pirko <redacted> Introduce __devlink_alloc() as an internal devlink allocator that accepts a struct device_driver pointer and stores it in the devlink instance. This allows internal devlink code (e.g. shared instances) to associate a driver with a devlink instance without need to pass dev pointer. Signed-off-by: Jiri Pirko <redacted> --- v2->v3: - new patch --- net/devlink/core.c | 40 ++++++++++++++++++++++--------------- net/devlink/devl_internal.h | 5 +++++ 2 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/net/devlink/core.c b/net/devlink/core.c
index 237558abcd63..fcb73d3e56aa 100644
--- a/net/devlink/core.c
+++ b/net/devlink/core.c@@ -418,27 +418,15 @@ void devlink_unregister(struct devlink *devlink) } EXPORT_SYMBOL_GPL(devlink_unregister); -/** - * devlink_alloc_ns - Allocate new devlink instance resources - * in specific namespace - * - * @ops: ops - * @priv_size: size of user private data - * @net: net namespace - * @dev: parent device - * - * Allocate new devlink instance resources, including devlink index - * and name. - */ -struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, - size_t priv_size, struct net *net, - struct device *dev) +struct devlink *__devlink_alloc(const struct devlink_ops *ops, size_t priv_size, + struct net *net, struct device *dev, + const struct device_driver *dev_driver) { struct devlink *devlink; static u32 last_id; int ret; - WARN_ON(!ops || !dev); + WARN_ON(!ops || !dev || !dev_driver); if (!devlink_reload_actions_valid(ops)) return NULL;
@@ -453,6 +441,7 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, devlink->dev = get_device(dev); devlink->ops = ops; + devlink->dev_driver = dev_driver; xa_init_flags(&devlink->ports, XA_FLAGS_ALLOC); xa_init_flags(&devlink->params, XA_FLAGS_ALLOC); xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
@@ -480,6 +469,25 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, kvfree(devlink); return NULL; } + +/** + * devlink_alloc_ns - Allocate new devlink instance resources + * in specific namespace + * + * @ops: ops + * @priv_size: size of user private data + * @net: net namespace + * @dev: parent device + * + * Allocate new devlink instance resources, including devlink index + * and name. + */ +struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, + size_t priv_size, struct net *net, + struct device *dev) +{ + return __devlink_alloc(ops, priv_size, net, dev, dev->driver); +} EXPORT_SYMBOL_GPL(devlink_alloc_ns); /**
diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index f0ebfb936770..3cc7e696e0fd 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h@@ -49,6 +49,7 @@ struct devlink { struct xarray snapshot_ids; struct devlink_dev_stats stats; struct device *dev; + const struct device_driver *dev_driver; possible_net_t _net; /* Serializes access to devlink instance specific objects such as * port, sb, dpipe, resource, params, region, traps and more.
@@ -66,6 +67,10 @@ struct devlink { extern struct xarray devlinks; extern struct genl_family devlink_nl_family; +struct devlink *__devlink_alloc(const struct devlink_ops *ops, size_t priv_size, + struct net *net, struct device *dev, + const struct device_driver *dev_driver); + /* devlink instances are open to the access from the user space after * devlink_register() call. Such logical barrier allows us to have certain * expectations related to locking.
--
2.51.1