kernel/linux.git/net/devlink/netlink_gen.c, branch v7.1-rc5

devlink: Add resource scope filtering to resource dump

2026-04-09T02:55:39+00:00

Allow filtering the resource dump to device-level or port-level resources using the 'scope' option. Example - dump only device-level resources: $ devlink resource show scope dev pci/0000:03:00.0: name max_local_SFs size 128 unit entry dpipe_tables none name max_external_SFs size 128 unit entry dpipe_tables none pci/0000:03:00.1: name max_local_SFs size 128 unit entry dpipe_tables none name max_external_SFs size 128 unit entry dpipe_tables none Example - dump only port-level resources: $ devlink resource show scope port pci/0000:03:00.0/196608: name max_SFs size 128 unit entry dpipe_tables none pci/0000:03:00.0/196609: name max_SFs size 128 unit entry dpipe_tables none pci/0000:03:00.1/196708: name max_SFs size 128 unit entry dpipe_tables none pci/0000:03:00.1/196709: name max_SFs size 128 unit entry dpipe_tables none Signed-off-by: Or Har-Toov Reviewed-by: Moshe Shemesh Signed-off-by: Tariq Toukan Link: https://patch.msgid.link/20260407194107.148063-11-tariqt@nvidia.com Signed-off-by: Jakub Kicinski

devlink: Add port-specific option to resource dump doit

2026-04-09T02:55:39+00:00

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 Link: https://patch.msgid.link/20260407194107.148063-8-tariqt@nvidia.com Signed-off-by: Jakub Kicinski

devlink: Add dump support for device-level resources

2026-04-09T02:55:38+00:00

Add dumpit handler for resource-dump command to iterate over all devlink devices and show their resources. $ devlink resource show pci/0000:08:00.0: name local_max_SFs size 508 unit entry name external_max_SFs size 508 unit entry pci/0000:08:00.1: name local_max_SFs size 508 unit entry name external_max_SFs size 508 unit entry Signed-off-by: Or Har-Toov Reviewed-by: Shay Drori Reviewed-by: Moshe Shemesh Reviewed-by: Jiri Pirko Signed-off-by: Tariq Toukan Link: https://patch.msgid.link/20260407194107.148063-6-tariqt@nvidia.com Signed-off-by: Jakub Kicinski

devlink: allow to use devlink index as a command handle

2026-03-14T20:08:47+00:00

Currently devlink instances are addressed bus_name/dev_name tuple. Allow the newly introduced DEVLINK_ATTR_INDEX to be used as an alternative handle for all devlink commands. When DEVLINK_ATTR_INDEX is present in the request, use it for a direct xarray lookup instead of iterating over all instances comparing bus_name/dev_name strings. Signed-off-by: Jiri Pirko Link: https://patch.msgid.link/20260312100407.551173-5-jiri@resnulli.us Signed-off-by: Jakub Kicinski

tools: ynl-gen: add regeneration comment

2025-11-26T03:20:42+00:00

Add a comment on regeneration to the generated files. The comment is placed after the YNL-GEN line[1], as to not interfere with ynl-regen.sh's detection logic. [1] and after the optional YNL-ARG line. Link: https://lore.kernel.org/r/aR5m174O7pklKrMR@zx2c4.com/ Suggested-by: Jason A. Donenfeld Signed-off-by: Asbjørn Sloth Tønnesen Acked-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20251120174429.390574-3-ast@fiberby.net Signed-off-by: Jakub Kicinski

devlink: support default values for param-get and param-set

2025-11-21T03:01:22+00:00

Support querying and resetting to default param values. Introduce two new devlink netlink attrs: DEVLINK_ATTR_PARAM_VALUE_DEFAULT and DEVLINK_ATTR_PARAM_RESET_DEFAULT. The former is used to contain an optional parameter value inside of the param_value nested attribute. The latter is used in param-set requests from userspace to indicate that the driver should reset the param to its default value. To implement this, two new functions are added to the devlink driver api: devlink_param::get_default() and devlink_param::reset_default(). These callbacks allow drivers to implement default param actions for runtime and permanent cmodes. For driverinit params, the core latches the last value set by a driver via devl_param_driverinit_value_set(), and uses that as the default value for a param. Because default parameter values are optional, it would be impossible to discern whether or not a param of type bool has default value of false or not provided if the default value is encoded using a netlink flag type. For this reason, when a DEVLINK_PARAM_TYPE_BOOL has an associated default value, the default value is encoded using a u8 type. Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20251119025038.651131-4-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski

devlink: Introduce switchdev_inactive eswitch mode

2025-11-11T12:17:53+00:00

Adds DEVLINK_ESWITCH_MODE_SWITCHDEV_INACTIVE attribute to UAPI and documentation. Before having traffic flow through an eswitch, a user may want to have the ability to block traffic towards the FDB until FDB is fully programmed and the user is ready to send traffic to it. For example: when two eswitches are present for vports in a multi-PF setup, one eswitch may take over the traffic from the other when the user chooses. Before this take over, a user may want to first program the inactive eswitch and then once ready redirect traffic to this new eswitch. switchdev modes transition semantics: legacy->switchdev_inactive: Create switchdev mode normally, traffic not allowed to flow yet. switchdev_inactive->switchdev: Enable traffic to flow. switchdev->switchdev_inactive: Block traffic on the FDB, FDB and representros state and content is preserved. When eswitch is configured to this mode, traffic is ignored/dropped on this eswitch FDB, while current configuration is kept, e.g FDB rules and netdev representros are kept available, FDB programming is allowed. Example: # start inactive switchdev devlink dev eswitch set pci/0000:08:00.1 mode switchdev_inactive # setup TC rules, representors etc .. # activate devlink dev eswitch set pci/0000:08:00.1 mode switchdev Signed-off-by: Saeed Mahameed Reviewed-by: Jiri Pirko Link: https://patch.msgid.link/20251108070404.1551708-2-saeed@kernel.org Signed-off-by: Paolo Abeni

devlink: Make health reporter burst period configurable

2025-08-27T00:24:16+00:00

Enable configuration of the burst period — a time window starting from the first error recovery, during which the reporter allows recovery attempts for each reported error. This feature is helpful when a single underlying issue causes multiple errors, as it delays the start of the grace period to allow sufficient time for recovering all related errors. For example, if multiple TX queues time out simultaneously, a sufficient burst period could allow all affected TX queues to be recovered within that window. Without this period, only the first TX queue that reports a timeout will undergo recovery, while the remaining TX queues will be blocked once the grace period begins. Configuration example: $ devlink health set pci/0000:00:09.0 reporter tx burst_period 500 Configuration example with ynl: ./tools/net/ynl/pyynl/cli.py \ --spec Documentation/netlink/specs/devlink.yaml \ --do health-reporter-set --json '{ "bus-name": "auxiliary", "dev-name": "mlx5_core.eth.0", "port-index": 65535, "health-reporter-name": "tx", "health-reporter-burst-period": 500 }' Signed-off-by: Shahar Shitrit Reviewed-by: Jiri Pirko Reviewed-by: Dragos Tatulea Reviewed-by: Carolina Jubran Signed-off-by: Mark Bloch Link: https://patch.msgid.link/20250824084354.533182-5-mbloch@nvidia.com Signed-off-by: Jakub Kicinski

devlink: Fix excessive stack usage in rate TC bandwidth parsing

2025-07-24T00:07:35+00:00

The devlink_nl_rate_tc_bw_parse function uses a large stack array for devlink attributes, which triggers a warning about excessive stack usage: net/devlink/rate.c: In function 'devlink_nl_rate_tc_bw_parse': net/devlink/rate.c:382:1: error: the frame size of 1648 bytes is larger than 1536 bytes [-Werror=frame-larger-than=] Introduce a separate attribute set specifically for rate TC bandwidth parsing that only contains the two attributes actually used: index and bandwidth. This reduces the stack array from DEVLINK_ATTR_MAX entries to just 2 entries, solving the stack usage issue. Update devlink selftest to use the new 'index' and 'bw' attribute names consistent with the YAML spec. Example usage with ynl with the new spec: ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml \ --do rate-set --json '{ "bus-name": "pci", "dev-name": "0000:08:00.0", "port-index": 1, "rate-tc-bws": [ {"index": 0, "bw": 50}, {"index": 1, "bw": 50}, {"index": 2, "bw": 0}, {"index": 3, "bw": 0}, {"index": 4, "bw": 0}, {"index": 5, "bw": 0}, {"index": 6, "bw": 0}, {"index": 7, "bw": 0} ] }' ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml \ --do rate-get --json '{ "bus-name": "pci", "dev-name": "0000:08:00.0", "port-index": 1 }' output for rate-get: {'bus-name': 'pci', 'dev-name': '0000:08:00.0', 'port-index': 1, 'rate-tc-bws': [{'bw': 50, 'index': 0}, {'bw': 50, 'index': 1}, {'bw': 0, 'index': 2}, {'bw': 0, 'index': 3}, {'bw': 0, 'index': 4}, {'bw': 0, 'index': 5}, {'bw': 0, 'index': 6}, {'bw': 0, 'index': 7}], 'rate-tx-max': 0, 'rate-tx-priority': 0, 'rate-tx-share': 0, 'rate-tx-weight': 0, 'rate-type': 'leaf'} Fixes: 566e8f108fc7 ("devlink: Extend devlink rate API with traffic classes bandwidth management") Reported-by: Arnd Bergmann Closes: https://lore.kernel.org/netdev/20250708160652.1810573-1-arnd@kernel.org/ Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202507171943.W7DJcs6Y-lkp@intel.com/ Suggested-by: Jakub Kicinski Signed-off-by: Carolina Jubran Tested-by: Carolina Jubran Signed-off-by: Tariq Toukan Reviewed-by: Jiri Pirko Link: https://patch.msgid.link/1753175609-330621-1-git-send-email-tariqt@nvidia.com Signed-off-by: Jakub Kicinski

devlink: Extend devlink rate API with traffic classes bandwidth management

2025-07-02T22:39:05+00:00

Introduce support for specifying relative bandwidth shares between traffic classes (TC) in the devlink-rate API. This new option allows users to allocate bandwidth across multiple traffic classes in a single command. This feature provides a more granular control over traffic management, especially for scenarios requiring Enhanced Transmission Selection. Users can now define a relative bandwidth share for each traffic class. For example, assigning share values of 20 to TC0 (TCP/UDP) and 80 to TC5 (RoCE) will result in TC0 receiving 20% and TC5 receiving 80% of the total bandwidth. The actual percentage each class receives depends on the ratio of its share value to the sum of all shares. Example: DEV=pci/0000:08:00.0 $ devlink port function rate add $DEV/vfs_group tx_share 10Gbit \ tx_max 50Gbit tc-bw 0:20 1:0 2:0 3:0 4:0 5:80 6:0 7:0 $ devlink port function rate set $DEV/vfs_group \ tc-bw 0:20 1:0 2:0 3:0 4:0 5:20 6:60 7:0 Example usage with ynl: ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml \ --do rate-set --json '{ "bus-name": "pci", "dev-name": "0000:08:00.0", "port-index": 1, "rate-tc-bws": [ {"rate-tc-index": 0, "rate-tc-bw": 50}, {"rate-tc-index": 1, "rate-tc-bw": 50}, {"rate-tc-index": 2, "rate-tc-bw": 0}, {"rate-tc-index": 3, "rate-tc-bw": 0}, {"rate-tc-index": 4, "rate-tc-bw": 0}, {"rate-tc-index": 5, "rate-tc-bw": 0}, {"rate-tc-index": 6, "rate-tc-bw": 0}, {"rate-tc-index": 7, "rate-tc-bw": 0} ] }' ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml \ --do rate-get --json '{ "bus-name": "pci", "dev-name": "0000:08:00.0", "port-index": 1 }' output for rate-get: {'bus-name': 'pci', 'dev-name': '0000:08:00.0', 'port-index': 1, 'rate-tc-bws': [{'rate-tc-bw': 50, 'rate-tc-index': 0}, {'rate-tc-bw': 50, 'rate-tc-index': 1}, {'rate-tc-bw': 0, 'rate-tc-index': 2}, {'rate-tc-bw': 0, 'rate-tc-index': 3}, {'rate-tc-bw': 0, 'rate-tc-index': 4}, {'rate-tc-bw': 0, 'rate-tc-index': 5}, {'rate-tc-bw': 0, 'rate-tc-index': 6}, {'rate-tc-bw': 0, 'rate-tc-index': 7}], 'rate-tx-max': 0, 'rate-tx-priority': 0, 'rate-tx-share': 0, 'rate-tx-weight': 0, 'rate-type': 'leaf'} Signed-off-by: Carolina Jubran Reviewed-by: Cosmin Ratiu Reviewed-by: Jiri Pirko Signed-off-by: Tariq Toukan Signed-off-by: Mark Bloch Link: https://patch.msgid.link/20250629142138.361537-3-mbloch@nvidia.com Signed-off-by: Jakub Kicinski