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Wed, 1 Apr 2026 11:51:15 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Simon Horman , Donald Hunter , Jiri Pirko , Jonathan Corbet , Shuah Khan , Saeed Mahameed , "Leon Romanovsky" , Tariq Toukan , Mark Bloch , Shuah Khan , Chuck Lever , "Matthieu Baerts (NGI0)" , Carolina Jubran , Or Har-Toov , Moshe Shemesh , Dragos Tatulea , Shahar Shitrit , Daniel Zahka , Jacob Keller , Cosmin Ratiu , Parav Pandit , Shay Drori , "Adithya Jayachandran" , Kees Cook , "Daniel Jurgens" , , , , , , Gal Pressman Subject: [PATCH net-next V4 07/12] devlink: Add port-specific option to resource dump doit Date: Wed, 1 Apr 2026 21:49:42 +0300 Message-ID: <20260401184947.135205-8-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260401184947.135205-1-tariqt@nvidia.com> References: <20260401184947.135205-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E63:EE_|IA0PR12MB7531:EE_ X-MS-Office365-Filtering-Correlation-Id: 5ea95cb8-e967-40e1-b3fe-08de901fb8e6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|36860700016|376014|82310400026|56012099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(36860700016)(376014)(82310400026)(56012099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: PkI2bGkVP9mmhidmlO0JTCUt/7dAcxMg0Es6vL2i2od7z2dv52MT2XFT1pldI4bb1lKZHvsuIKYHoprejSUIFLMv2vEe67vYGF0Cr/gJDHHcF4NaTxaftQoCPoqI0g9QXkYGAYdNbHMAFpDMz7kjD/RjvEkvwSxEamIIrkave6F1LHbifAd0xzUjOUvTyWapQnfi4/ErxHJejGKZmVt3TP0kNpYSi0jBRWB8+j91NrHp75JK2zSQz5GlHVABxiZBwjMlJF6rRHNDj8RajAB/vDQuqoQdDv65cKH2w7VgfL5JsYbIDWRlNfNDHKE3tLxscLXc2/V6aIOmuJYRngmS3IndvnsTAPsLeJBP7hjqYIBJXvC/+L7PmXhAxdATqYMWddFnzhd4KFKLyz9X4sxH2i31fwON1OtovjZtrsFKN/6CuxTt3RHtkXnBqHNFNATA X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Apr 2026 18:51:45.2716 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5ea95cb8-e967-40e1-b3fe-08de901fb8e6 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E63.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB7531 Content-Type: text/plain; charset="utf-8" From: Or Har-Toov Allow querying devlink resources per-port via the resource-dump doit handler. When a port-index attribute is provided, only that port's resources are returned. When no port-index is given, only device-level resources are returned, preserving backward compatibility. Signed-off-by: Or Har-Toov Reviewed-by: Moshe Shemesh Signed-off-by: Tariq Toukan --- Documentation/netlink/specs/devlink.yaml | 4 +++- net/devlink/netlink_gen.c | 3 ++- net/devlink/netlink_gen.h | 4 ++-- net/devlink/resource.c | 20 +++++++++++++++++--- 4 files changed, 24 insertions(+), 7 deletions(-) diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netli= nk/specs/devlink.yaml index c423e049c7bd..34aa81ba689e 100644 --- a/Documentation/netlink/specs/devlink.yaml +++ b/Documentation/netlink/specs/devlink.yaml @@ -1757,19 +1757,21 @@ operations: attribute-set: devlink dont-validate: [strict] do: - pre: devlink-nl-pre-doit + pre: devlink-nl-pre-doit-port-optional post: devlink-nl-post-doit request: attributes: - bus-name - dev-name - index + - port-index reply: &resource-dump-reply value: 36 attributes: - bus-name - dev-name - index + - port-index - resource-list dump: request: diff --git a/net/devlink/netlink_gen.c b/net/devlink/netlink_gen.c index a5a47a4c6de8..9cc372d9ee41 100644 --- a/net/devlink/netlink_gen.c +++ b/net/devlink/netlink_gen.c @@ -309,6 +309,7 @@ static const struct nla_policy devlink_resource_dump_do= _nl_policy[DEVLINK_ATTR_I [DEVLINK_ATTR_BUS_NAME] =3D { .type =3D NLA_NUL_STRING, }, [DEVLINK_ATTR_DEV_NAME] =3D { .type =3D NLA_NUL_STRING, }, [DEVLINK_ATTR_INDEX] =3D NLA_POLICY_FULL_RANGE(NLA_UINT, &devlink_attr_in= dex_range), + [DEVLINK_ATTR_PORT_INDEX] =3D { .type =3D NLA_U32, }, }; =20 /* DEVLINK_CMD_RESOURCE_DUMP - dump */ @@ -962,7 +963,7 @@ const struct genl_split_ops devlink_nl_ops[75] =3D { { .cmd =3D DEVLINK_CMD_RESOURCE_DUMP, .validate =3D GENL_DONT_VALIDATE_STRICT, - .pre_doit =3D devlink_nl_pre_doit, + .pre_doit =3D devlink_nl_pre_doit_port_optional, .doit =3D devlink_nl_resource_dump_doit, .post_doit =3D devlink_nl_post_doit, .policy =3D devlink_resource_dump_do_nl_policy, diff --git a/net/devlink/netlink_gen.h b/net/devlink/netlink_gen.h index d79f6a0888f6..20034b0929a8 100644 --- a/net/devlink/netlink_gen.h +++ b/net/devlink/netlink_gen.h @@ -24,11 +24,11 @@ int devlink_nl_pre_doit(const struct genl_split_ops *op= s, struct sk_buff *skb, struct genl_info *info); int devlink_nl_pre_doit_port(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info); -int devlink_nl_pre_doit_dev_lock(const struct genl_split_ops *ops, - struct sk_buff *skb, struct genl_info *info); int devlink_nl_pre_doit_port_optional(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info); +int devlink_nl_pre_doit_dev_lock(const struct genl_split_ops *ops, + struct sk_buff *skb, struct genl_info *info); void devlink_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info); diff --git a/net/devlink/resource.c b/net/devlink/resource.c index 48f195063551..0f1d90bc4b09 100644 --- a/net/devlink/resource.c +++ b/net/devlink/resource.c @@ -251,8 +251,10 @@ static int devlink_resource_list_fill(struct sk_buff *= skb, static int devlink_resource_fill(struct genl_info *info, enum devlink_command cmd, int flags) { + struct devlink_port *devlink_port =3D info->user_ptr[1]; struct devlink *devlink =3D info->user_ptr[0]; struct devlink_resource *resource; + struct list_head *resource_list; struct nlattr *resources_attr; struct sk_buff *skb =3D NULL; struct nlmsghdr *nlh; @@ -261,7 +263,9 @@ static int devlink_resource_fill(struct genl_info *info, int i; int err; =20 - resource =3D list_first_entry(&devlink->resource_list, + resource_list =3D devlink_port ? + &devlink_port->resource_list : &devlink->resource_list; + resource =3D list_first_entry(resource_list, struct devlink_resource, list); start_again: err =3D devlink_nl_msg_reply_and_new(&skb, info); @@ -277,6 +281,9 @@ static int devlink_resource_fill(struct genl_info *info, =20 if (devlink_nl_put_handle(skb, devlink)) goto nla_put_failure; + if (devlink_port && + nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; =20 resources_attr =3D nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE_LIST); @@ -285,7 +292,7 @@ static int devlink_resource_fill(struct genl_info *info, =20 incomplete =3D false; i =3D 0; - list_for_each_entry_from(resource, &devlink->resource_list, list) { + list_for_each_entry_from(resource, resource_list, list) { err =3D devlink_resource_put(devlink, skb, resource); if (err) { if (!i) @@ -319,9 +326,16 @@ static int devlink_resource_fill(struct genl_info *inf= o, =20 int devlink_nl_resource_dump_doit(struct sk_buff *skb, struct genl_info *i= nfo) { + struct devlink_port *devlink_port =3D info->user_ptr[1]; struct devlink *devlink =3D info->user_ptr[0]; + struct list_head *resource_list; + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX] && !devlink_port) + return -ENODEV; =20 - if (list_empty(&devlink->resource_list)) + resource_list =3D devlink_port ? + &devlink_port->resource_list : &devlink->resource_list; + if (list_empty(resource_list)) return -EOPNOTSUPP; =20 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0); --=20 2.44.0