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Wed, 1 Jul 2026 00:33:33 -0700 From: Tariq Toukan To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , , Paolo Abeni CC: Adithya Jayachandran , Bobby Eshleman , Carolina Jubran , Cosmin Ratiu , Daniel Borkmann , Daniel Jurgens , Daniel Zahka , David Wei , Donald Hunter , Dragos Tatulea , Jiri Pirko , Jiri Pirko , Joe Damato , Jonathan Corbet , Kees Cook , Leon Romanovsky , , , , , Mark Bloch , Moshe Shemesh , Or Har-Toov , Parav Pandit , Petr Machata , Ratheesh Kannoth , Saeed Mahameed , Shahar Shitrit , Shay Drori , Shuah Khan , Shuah Khan , Simon Horman , Stanislav Fomichev , Tariq Toukan , Willem de Bruijn , Gal Pressman Subject: [PATCH net-next V10 02/14] devlink: Add a helper for getting a nested-in instance Date: Wed, 1 Jul 2026 10:32:42 +0300 Message-ID: <20260701073254.754518-3-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260701073254.754518-1-tariqt@nvidia.com> References: <20260701073254.754518-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF00017094:EE_|CY5PR12MB6646:EE_ X-MS-Office365-Filtering-Correlation-Id: 46b9dad0-7a5c-4c25-f868-08ded7432260 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700016|376014|7416014|23010399003|22082099003|18002099003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: qiGAlJmzejAN/KRBMKvmh7s/Q8TE/iEWvNcq5Sq+n82Z5EnB/QgxHR4k4hpwl24TYbpdcAY8G2YNc86ahY/q9qCq7G+kM7gsFEI8McWu0ICU4d1tjbCTAheXC8DvW6deAvaYDa2nnGP0NHtDMT577UCXnForoKsdUMdn17xZjJc1UliqN3DU2CAhusiEeh4UUT21etFdrr9Ix1sqaxAbvqmxKZdLS043f/iF6kCl3/wjrNYZP786sj2IS3gIJrxTtEPkGapiBrlr0gqka3qL/rSiK1bKaYPRV5UZY1AQR45HkTNL+BiqiHAK+3Q/CxmSSkkvtNRmK7LsjTj/xgah87/vC23ZuzBf139AkwoKeawXbFW9WrUPsLbwoiv8bjVlkdAxQqQptByDMkdNlgNZIM/F80czUcbON7273c3vJNJ6+9gpzypRkWcJ5SJRhIgpuE06BVAHVB7UrtCwzlSlr5kvdN2jRNB6Fmb3Gx9/ux4c25bFGm7ahapHuW5kL83gUlsKTrNt5jKhZ39uGsIFPUz7Jieax9MNnSwXBLPY48DTtYG22UfomLIXDjFrSUWXvG+g1E5fe+lt3/ldbH7IuIbJfrsQY4FhLE8EfWjpoG8oNPP1ZGDYKnw+eIA1A5k1WdZNORkLrRVTM2BshJOLd2MvP0cDBrl1eQmEs1GFjfEx09Z/FX/FyaWmdRBGrN+epTfdYvbOsfusfvvSjAz89w== 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)(82310400026)(36860700016)(376014)(7416014)(23010399003)(22082099003)(18002099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: C+48xfFRrYfaJ5p/kE9OcUiB42LvlSLwKVNpfD65gbeCYcl2CzT7cGVV1s5zAObDrDrcbVh5VvLTi0Wv8C3HXJDk6X4AI5uOolyjPUHROlP0dVb9hgulu2+GgeSRmN67yqvqpkvTPq0WxFDfpMkA+jetXoy2BTEaSZiCONh7coYZcie/uDbyc7l5nUcAxLo+ck03MjYAiLvgZLRqPiOJhKRjEY8kWnp0bO5KRjordjSem85FaZe7JYASnd1RtkX9X6uG7zfQFNmHROm1PKuhQ1HoL7gKV7Q69ntJOX+XINUXa3J4iqT4a7K9Fm5gLsYsyQDHohr+e7/Kl1WU/7Tn/RgafZF5vJPG4EhOTMTt9f9CtDyUqy4ybQkCHyODEjziASTuyE5uGhRzSqpsve4oXVArNLqjahJESSzbMXmLqzliOcIQFqrrMWacEAf4Ie1D X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Jul 2026 07:34:06.9388 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 46b9dad0-7a5c-4c25-f868-08ded7432260 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: DS1PEPF00017094.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6646 From: Cosmin Ratiu Upcoming code will need to obtain references to locked nested-in devlink instances. Add a helper to lock, reference and return the nested-in instance. Signed-off-by: Cosmin Ratiu Reviewed-by: Carolina Jubran Reviewed-by: Jiri Pirko Signed-off-by: Tariq Toukan --- net/devlink/core.c | 16 ++++++++++++++++ net/devlink/devl_internal.h | 4 ++++ 2 files changed, 20 insertions(+) diff --git a/net/devlink/core.c b/net/devlink/core.c index fe9f6a0a67d5..ee26c50b4118 100644 --- a/net/devlink/core.c +++ b/net/devlink/core.c @@ -67,6 +67,22 @@ static void __devlink_rel_put(struct devlink_rel *rel) devlink_rel_free(rel); } +struct devlink *__must_check devlink_nested_in_get_lock(struct devlink *devlink) +{ + devl_assert_locked(devlink); + if (!devlink->rel) + return NULL; + devlink = devlinks_xa_get(devlink->rel->nested_in.devlink_index); + if (!devlink) + return NULL; + devl_lock(devlink); + if (devl_is_registered(devlink)) + return devlink; + devl_unlock(devlink); + devlink_put(devlink); + return NULL; +} + static void devlink_rel_nested_in_notify_work(struct work_struct *work) { struct devlink_rel *rel = container_of(work, struct devlink_rel, diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h index e4e48ee2da5a..36dff282f9b0 100644 --- a/net/devlink/devl_internal.h +++ b/net/devlink/devl_internal.h @@ -136,6 +136,10 @@ typedef void devlink_rel_notify_cb_t(struct devlink *devlink, u32 obj_index); typedef void devlink_rel_cleanup_cb_t(struct devlink *devlink, u32 obj_index, u32 rel_index); +/* Returns the locked+referenced nested-in instance or NULL. */ +struct devlink *__must_check +devlink_nested_in_get_lock(struct devlink *devlink); + void devlink_rel_nested_in_clear(u32 rel_index); int devlink_rel_nested_in_add(u32 *rel_index, u32 devlink_index, u32 obj_index, devlink_rel_notify_cb_t *notify_cb, -- 2.44.0