From: Jiri Pirko <jiri@resnulli.us>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, horms@kernel.org, donald.hunter@gmail.com,
corbet@lwn.net, skhan@linuxfoundation.org, saeedm@nvidia.com,
leon@kernel.org, tariqt@nvidia.com, mbloch@nvidia.com,
przemyslaw.kitszel@intel.com, mschmidt@redhat.com,
andrew+netdev@lunn.ch, rostedt@goodmis.org, mhiramat@kernel.org,
mathieu.desnoyers@efficios.com, chuck.lever@oracle.com,
matttbe@kernel.org, cjubran@nvidia.com, daniel.zahka@gmail.com,
linux-doc@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-trace-kernel@vger.kernel.org
Subject: [PATCH net-next v2 02/10] devlink: store bus_name and dev_name pointers in struct devlink
Date: Wed, 25 Feb 2026 14:34:14 +0100 [thread overview]
Message-ID: <20260225133422.290965-3-jiri@resnulli.us> (raw)
In-Reply-To: <20260225133422.290965-1-jiri@resnulli.us>
From: Jiri Pirko <jiri@nvidia.com>
Currently, bus_name and dev_name are obtained from the parent dev
instance every time they are needed.
In preparation to dev-less devlinks, store bus_name and dev_name
pointers in struct devlink during devlink_alloc_ns() and use them
throughout.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
---
include/net/devlink.h | 2 ++
include/trace/events/devlink.h | 24 ++++++++++++------------
net/devlink/core.c | 14 ++++++++++++++
net/devlink/devl_internal.h | 10 ++++++----
net/devlink/netlink.c | 4 ++--
net/devlink/port.c | 4 ++--
6 files changed, 38 insertions(+), 20 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index cb839e0435a1..0afb0958b910 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1611,6 +1611,8 @@ struct devlink_ops {
void *devlink_priv(struct devlink *devlink);
struct devlink *priv_to_devlink(void *priv);
struct device *devlink_to_dev(const struct devlink *devlink);
+const char *devlink_bus_name(const struct devlink *devlink);
+const char *devlink_dev_name(const struct devlink *devlink);
/* Devlink instance explicit locking */
void devl_lock(struct devlink *devlink);
diff --git a/include/trace/events/devlink.h b/include/trace/events/devlink.h
index f241e204fe6b..32304ce9ad15 100644
--- a/include/trace/events/devlink.h
+++ b/include/trace/events/devlink.h
@@ -21,8 +21,8 @@ TRACE_EVENT(devlink_hwmsg,
TP_ARGS(devlink, incoming, type, buf, len),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__field(bool, incoming)
__field(unsigned long, type)
@@ -55,8 +55,8 @@ TRACE_EVENT(devlink_hwerr,
TP_ARGS(devlink, err, msg),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__field(int, err)
__string(msg, msg)
@@ -85,8 +85,8 @@ TRACE_EVENT(devlink_health_report,
TP_ARGS(devlink, reporter_name, msg),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__string(reporter_name, reporter_name)
__string(msg, msg)
@@ -116,8 +116,8 @@ TRACE_EVENT(devlink_health_recover_aborted,
TP_ARGS(devlink, reporter_name, health_state, time_since_last_recover),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__string(reporter_name, reporter_name)
__field(bool, health_state)
@@ -150,8 +150,8 @@ TRACE_EVENT(devlink_health_reporter_state_update,
TP_ARGS(devlink, reporter_name, new_state),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__string(reporter_name, reporter_name)
__field(u8, new_state)
@@ -181,8 +181,8 @@ TRACE_EVENT(devlink_trap_report,
TP_ARGS(devlink, skb, metadata),
TP_STRUCT__entry(
- __string(bus_name, devlink_to_dev(devlink)->bus->name)
- __string(dev_name, dev_name(devlink_to_dev(devlink)))
+ __string(bus_name, devlink_bus_name(devlink))
+ __string(dev_name, devlink_dev_name(devlink))
__string(driver_name, devlink_to_dev(devlink)->driver->name)
__string(trap_name, metadata->trap_name)
__string(trap_group_name, metadata->trap_group_name)
diff --git a/net/devlink/core.c b/net/devlink/core.c
index da56e2b8afc1..49f856beb8b2 100644
--- a/net/devlink/core.c
+++ b/net/devlink/core.c
@@ -248,6 +248,18 @@ struct device *devlink_to_dev(const struct devlink *devlink)
}
EXPORT_SYMBOL_GPL(devlink_to_dev);
+const char *devlink_bus_name(const struct devlink *devlink)
+{
+ return devlink->bus_name;
+}
+EXPORT_SYMBOL_GPL(devlink_bus_name);
+
+const char *devlink_dev_name(const struct devlink *devlink)
+{
+ return devlink->dev_name;
+}
+EXPORT_SYMBOL_GPL(devlink_dev_name);
+
struct net *devlink_net(const struct devlink *devlink)
{
return read_pnet(&devlink->_net);
@@ -428,6 +440,8 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops,
goto err_xa_alloc;
devlink->dev = get_device(dev);
+ devlink->bus_name = dev->bus->name;
+ devlink->dev_name = dev_name(dev);
devlink->ops = ops;
xa_init_flags(&devlink->ports, XA_FLAGS_ALLOC);
xa_init_flags(&devlink->params, XA_FLAGS_ALLOC);
diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index 31fa98af418e..d43819c6b452 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -32,6 +32,8 @@ struct devlink_dev_stats {
struct devlink {
u32 index;
+ const char *bus_name;
+ const char *dev_name;
struct xarray ports;
struct list_head rate_list;
struct list_head sb_list;
@@ -174,9 +176,9 @@ devlink_dump_state(struct netlink_callback *cb)
static inline int
devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
{
- if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
+ if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->bus_name))
return -EMSGSIZE;
- if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
+ if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, devlink->dev_name))
return -EMSGSIZE;
if (nla_put_uint(msg, DEVLINK_ATTR_INDEX, devlink->index))
return -EMSGSIZE;
@@ -211,8 +213,8 @@ static inline void devlink_nl_obj_desc_init(struct devlink_obj_desc *desc,
struct devlink *devlink)
{
memset(desc, 0, sizeof(*desc));
- desc->bus_name = devlink->dev->bus->name;
- desc->dev_name = dev_name(devlink->dev);
+ desc->bus_name = devlink->bus_name;
+ desc->dev_name = devlink->dev_name;
}
static inline void devlink_nl_obj_desc_port_set(struct devlink_obj_desc *desc,
diff --git a/net/devlink/netlink.c b/net/devlink/netlink.c
index 593605c1b1ef..3f73ced2d879 100644
--- a/net/devlink/netlink.c
+++ b/net/devlink/netlink.c
@@ -193,8 +193,8 @@ devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs,
devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
devlinks_xa_for_each_registered_get(net, index, devlink) {
- if (strcmp(devlink->dev->bus->name, busname) == 0 &&
- strcmp(dev_name(devlink->dev), devname) == 0) {
+ if (strcmp(devlink->bus_name, busname) == 0 &&
+ strcmp(devlink->dev_name, devname) == 0) {
devl_dev_lock(devlink, dev_lock);
if (devl_is_registered(devlink))
return devlink;
diff --git a/net/devlink/port.c b/net/devlink/port.c
index 1ff609571ea4..1d4a79c6d4d3 100644
--- a/net/devlink/port.c
+++ b/net/devlink/port.c
@@ -220,8 +220,8 @@ size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port)
{
struct devlink *devlink = devlink_port->devlink;
- 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 */
+ return nla_total_size(strlen(devlink->bus_name) + 1) /* DEVLINK_ATTR_BUS_NAME */
+ + nla_total_size(strlen(devlink->dev_name) + 1) /* DEVLINK_ATTR_DEV_NAME */
+ nla_total_size(8) /* DEVLINK_ATTR_INDEX */
+ nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */
}
--
2.51.1
next prev parent reply other threads:[~2026-02-25 13:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 13:34 [PATCH net-next v2 00/10] devlink: introduce shared devlink instance for PFs on same chip Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 01/10] devlink: expose devlink instance index over netlink Jiri Pirko
2026-02-25 13:34 ` Jiri Pirko [this message]
2026-02-25 13:34 ` [PATCH net-next v2 03/10] devlink: avoid extra iterations when found devlink is not registered Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 04/10] devlink: allow to use devlink index as a command handle Jiri Pirko
2026-02-28 22:48 ` Jakub Kicinski
2026-03-02 10:23 ` Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 05/10] devlink: support index-based lookup via bus_name/dev_name handle Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 06/10] devlink: add devlink_dev_driver_name() helper and use it in trace events Jiri Pirko
2026-02-28 22:58 ` Jakub Kicinski
2026-03-02 9:44 ` Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 07/10] devlink: allow devlink instance allocation without a backing device Jiri Pirko
2026-02-28 23:01 ` Jakub Kicinski
2026-03-02 13:15 ` Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 08/10] devlink: introduce shared devlink instance for PFs on same chip Jiri Pirko
2026-02-28 23:03 ` Jakub Kicinski
2026-03-02 9:30 ` Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 09/10] documentation: networking: add shared devlink documentation Jiri Pirko
2026-02-28 23:05 ` Jakub Kicinski
2026-03-02 9:09 ` Jiri Pirko
2026-02-25 13:34 ` [PATCH net-next v2 10/10] net/mlx5: Add a shared devlink instance for PFs on same chip Jiri Pirko
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