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netlink: spec: add shaper YAML spec
Define the user-space visible interface to query, configure and delete network shapers via yaml definition. Add dummy implementations for the relevant NL callbacks. set() and delete() operations touch a single shaper creating/updating or deleting it. The group() operation creates a shaper's group, nesting multiple input shapers under the specified output shaper. Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Link: https://patch.msgid.link/7a33a1ff370bdbcd0cd3f909575c912cd56f41da.1728460186.git.pabeni@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni
Jakub Kicinski
parent
13d68a1643
commit
04e65df94b
274
Documentation/netlink/specs/net_shaper.yaml
Normal file
274
Documentation/netlink/specs/net_shaper.yaml
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@ -0,0 +1,274 @@
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# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
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name: net-shaper
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doc: |
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Networking HW rate limiting configuration.
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This API allows configuring HW shapers available on the network
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devices at different levels (queues, network device) and allows
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arbitrary manipulation of the scheduling tree of the involved
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shapers.
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Each @shaper is identified within the given device, by a @handle,
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comprising both a @scope and an @id.
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Depending on the @scope value, the shapers are attached to specific
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HW objects (queues, devices) or, for @node scope, represent a
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scheduling group, that can be placed in an arbitrary location of
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the scheduling tree.
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Shapers can be created with two different operations: the @set
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operation, to create and update a single "attached" shaper, and
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the @group operation, to create and update a scheduling
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group. Only the @group operation can create @node scope shapers.
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Existing shapers can be deleted/reset via the @delete operation.
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The user can query the running configuration via the @get operation.
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definitions:
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-
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type: enum
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name: scope
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doc: Defines the shaper @id interpretation.
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render-max: true
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entries:
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- name: unspec
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doc: The scope is not specified.
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-
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name: netdev
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doc: The main shaper for the given network device.
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-
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name: queue
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doc: |
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The shaper is attached to the given device queue,
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the @id represents the queue number.
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-
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name: node
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doc: |
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The shaper allows grouping of queues or other
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node shapers; can be nested in either @netdev
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shapers or other @node shapers, allowing placement
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in any location of the scheduling tree, except
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leaves and root.
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-
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type: enum
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name: metric
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doc: Different metric supported by the shaper.
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entries:
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-
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name: bps
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doc: Shaper operates on a bits per second basis.
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-
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name: pps
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doc: Shaper operates on a packets per second basis.
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attribute-sets:
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-
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name: net-shaper
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attributes:
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-
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name: handle
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type: nest
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nested-attributes: handle
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doc: Unique identifier for the given shaper inside the owning device.
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-
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name: metric
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type: u32
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enum: metric
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doc: Metric used by the given shaper for bw-min, bw-max and burst.
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-
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name: bw-min
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type: uint
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doc: Guaranteed bandwidth for the given shaper.
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-
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name: bw-max
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type: uint
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doc: Maximum bandwidth for the given shaper or 0 when unlimited.
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-
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name: burst
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type: uint
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doc: |
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Maximum burst-size for shaping. Should not be interpreted
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as a quantum.
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-
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name: priority
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type: u32
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doc: |
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Scheduling priority for the given shaper. The priority
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scheduling is applied to sibling shapers.
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-
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name: weight
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type: u32
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doc: |
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Relative weight for round robin scheduling of the
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given shaper.
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The scheduling is applied to all sibling shapers
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with the same priority.
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-
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name: ifindex
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type: u32
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doc: Interface index owning the specified shaper.
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-
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name: parent
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type: nest
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nested-attributes: handle
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doc: |
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Identifier for the parent of the affected shaper.
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Only needed for @group operation.
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-
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name: leaves
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type: nest
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multi-attr: true
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nested-attributes: leaf-info
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doc: |
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Describes a set of leaves shapers for a @group operation.
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-
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name: handle
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attributes:
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-
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name: scope
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type: u32
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enum: scope
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doc: Defines the shaper @id interpretation.
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-
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name: id
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type: u32
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doc: |
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Numeric identifier of a shaper. The id semantic depends on
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the scope. For @queue scope it's the queue id and for @node
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scope it's the node identifier.
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-
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name: leaf-info
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subset-of: net-shaper
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attributes:
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-
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name: handle
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-
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name: priority
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-
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name: weight
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operations:
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list:
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-
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name: get
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doc: |
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Get information about a shaper for a given device.
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attribute-set: net-shaper
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do:
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pre: net-shaper-nl-pre-doit
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post: net-shaper-nl-post-doit
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request:
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attributes: &ns-binding
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- ifindex
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- handle
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reply:
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attributes: &ns-attrs
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- ifindex
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- parent
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- handle
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- metric
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- bw-min
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- bw-max
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- burst
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- priority
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- weight
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dump:
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pre: net-shaper-nl-pre-dumpit
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post: net-shaper-nl-post-dumpit
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request:
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attributes:
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- ifindex
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reply:
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attributes: *ns-attrs
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-
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name: set
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doc: |
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Create or update the specified shaper.
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The set operation can't be used to create a @node scope shaper,
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use the @group operation instead.
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attribute-set: net-shaper
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flags: [ admin-perm ]
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do:
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pre: net-shaper-nl-pre-doit
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post: net-shaper-nl-post-doit
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request:
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attributes:
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- ifindex
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- handle
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- metric
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- bw-min
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- bw-max
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- burst
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- priority
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- weight
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-
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name: delete
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doc: |
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Clear (remove) the specified shaper. When deleting
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a @node shaper, reattach all the node's leaves to the
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deleted node's parent.
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If, after the removal, the parent shaper has no more
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leaves and the parent shaper scope is @node, the parent
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node is deleted, recursively.
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When deleting a @queue shaper or a @netdev shaper,
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the shaper disappears from the hierarchy, but the
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queue/device can still send traffic: it has an implicit
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node with infinite bandwidth. The queue's implicit node
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feeds an implicit RR node at the root of the hierarchy.
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attribute-set: net-shaper
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flags: [ admin-perm ]
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do:
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pre: net-shaper-nl-pre-doit
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post: net-shaper-nl-post-doit
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request:
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attributes: *ns-binding
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-
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name: group
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doc: |
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Create or update a scheduling group, attaching the specified
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@leaves shapers under the specified node identified by @handle.
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The @leaves shapers scope must be @queue and the node shaper
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scope must be either @node or @netdev.
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When the node shaper has @node scope, if the @handle @id is not
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specified, a new shaper of such scope is created, otherwise the
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specified node must already exist.
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When updating an existing node shaper, the specified @leaves are
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added to the existing node; such node will also retain any preexisting
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leave.
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The @parent handle for a new node shaper defaults to the parent
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of all the leaves, provided all the leaves share the same parent.
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Otherwise @parent handle must be specified.
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The user can optionally provide shaping attributes for the node
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shaper.
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The operation is atomic, on failure no change is applied to
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the device shaping configuration, otherwise the @node shaper
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full identifier, comprising @binding and @handle, is provided
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as the reply.
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attribute-set: net-shaper
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flags: [ admin-perm ]
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do:
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pre: net-shaper-nl-pre-doit
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post: net-shaper-nl-post-doit
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request:
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attributes:
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- ifindex
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- parent
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- handle
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- metric
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- bw-min
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- bw-max
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- burst
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- priority
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- weight
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- leaves
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reply:
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attributes: *ns-binding
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@ -16116,6 +16116,7 @@ F: include/linux/platform_data/wiznet.h
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F: include/uapi/linux/cn_proc.h
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F: include/uapi/linux/ethtool_netlink.h
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F: include/uapi/linux/if_*
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F: include/uapi/linux/net_shaper.h
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F: include/uapi/linux/netdev*
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F: tools/testing/selftests/drivers/net/
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X: Documentation/devicetree/bindings/net/bluetooth/
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78
include/uapi/linux/net_shaper.h
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78
include/uapi/linux/net_shaper.h
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@ -0,0 +1,78 @@
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/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
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/* Do not edit directly, auto-generated from: */
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/* Documentation/netlink/specs/net_shaper.yaml */
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/* YNL-GEN uapi header */
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#ifndef _UAPI_LINUX_NET_SHAPER_H
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#define _UAPI_LINUX_NET_SHAPER_H
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#define NET_SHAPER_FAMILY_NAME "net-shaper"
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#define NET_SHAPER_FAMILY_VERSION 1
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/**
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* enum net_shaper_scope - Defines the shaper @id interpretation.
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* @NET_SHAPER_SCOPE_UNSPEC: The scope is not specified.
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* @NET_SHAPER_SCOPE_NETDEV: The main shaper for the given network device.
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* @NET_SHAPER_SCOPE_QUEUE: The shaper is attached to the given device queue,
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* the @id represents the queue number.
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* @NET_SHAPER_SCOPE_NODE: The shaper allows grouping of queues or other node
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* shapers; can be nested in either @netdev shapers or other @node shapers,
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* allowing placement in any location of the scheduling tree, except leaves
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* and root.
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*/
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enum net_shaper_scope {
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NET_SHAPER_SCOPE_UNSPEC,
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NET_SHAPER_SCOPE_NETDEV,
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NET_SHAPER_SCOPE_QUEUE,
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NET_SHAPER_SCOPE_NODE,
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/* private: */
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__NET_SHAPER_SCOPE_MAX,
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NET_SHAPER_SCOPE_MAX = (__NET_SHAPER_SCOPE_MAX - 1)
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};
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/**
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* enum net_shaper_metric - Different metric supported by the shaper.
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* @NET_SHAPER_METRIC_BPS: Shaper operates on a bits per second basis.
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* @NET_SHAPER_METRIC_PPS: Shaper operates on a packets per second basis.
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*/
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enum net_shaper_metric {
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NET_SHAPER_METRIC_BPS,
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NET_SHAPER_METRIC_PPS,
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};
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enum {
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NET_SHAPER_A_HANDLE = 1,
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NET_SHAPER_A_METRIC,
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NET_SHAPER_A_BW_MIN,
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NET_SHAPER_A_BW_MAX,
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NET_SHAPER_A_BURST,
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NET_SHAPER_A_PRIORITY,
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NET_SHAPER_A_WEIGHT,
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NET_SHAPER_A_IFINDEX,
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NET_SHAPER_A_PARENT,
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NET_SHAPER_A_LEAVES,
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__NET_SHAPER_A_MAX,
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NET_SHAPER_A_MAX = (__NET_SHAPER_A_MAX - 1)
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};
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enum {
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NET_SHAPER_A_HANDLE_SCOPE = 1,
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NET_SHAPER_A_HANDLE_ID,
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__NET_SHAPER_A_HANDLE_MAX,
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NET_SHAPER_A_HANDLE_MAX = (__NET_SHAPER_A_HANDLE_MAX - 1)
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};
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enum {
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NET_SHAPER_CMD_GET = 1,
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NET_SHAPER_CMD_SET,
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NET_SHAPER_CMD_DELETE,
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NET_SHAPER_CMD_GROUP,
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__NET_SHAPER_CMD_MAX,
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NET_SHAPER_CMD_MAX = (__NET_SHAPER_CMD_MAX - 1)
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};
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#endif /* _UAPI_LINUX_NET_SHAPER_H */
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@ -72,6 +72,9 @@ config NET_DEVMEM
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depends on GENERIC_ALLOCATOR
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depends on PAGE_POOL
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config NET_SHAPER
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bool
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menu "Networking options"
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source "net/packet/Kconfig"
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@ -79,3 +79,4 @@ obj-$(CONFIG_XDP_SOCKETS) += xdp/
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obj-$(CONFIG_MPTCP) += mptcp/
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obj-$(CONFIG_MCTP) += mctp/
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obj-$(CONFIG_NET_HANDSHAKE) += handshake/
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obj-$(CONFIG_NET_SHAPER) += shaper/
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8
net/shaper/Makefile
Normal file
8
net/shaper/Makefile
Normal file
@ -0,0 +1,8 @@
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Makefile for the net shaper infrastructure.
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#
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# Copyright (c) 2024, Red Hat, Inc.
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#
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obj-y += shaper.o shaper_nl_gen.o
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55
net/shaper/shaper.c
Normal file
55
net/shaper/shaper.c
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include "shaper_nl_gen.h"
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int net_shaper_nl_pre_doit(const struct genl_split_ops *ops,
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struct sk_buff *skb, struct genl_info *info)
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{
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return -EOPNOTSUPP;
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}
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void net_shaper_nl_post_doit(const struct genl_split_ops *ops,
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struct sk_buff *skb, struct genl_info *info)
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{
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}
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int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info)
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{
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return -EOPNOTSUPP;
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}
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int net_shaper_nl_get_dumpit(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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return -EOPNOTSUPP;
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}
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int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info)
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{
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return -EOPNOTSUPP;
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}
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int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info)
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{
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return -EOPNOTSUPP;
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}
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int net_shaper_nl_pre_dumpit(struct netlink_callback *cb)
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{
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return -EOPNOTSUPP;
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}
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int net_shaper_nl_post_dumpit(struct netlink_callback *cb)
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{
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return -EOPNOTSUPP;
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}
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static int __init shaper_init(void)
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{
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return genl_register_family(&net_shaper_nl_family);
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}
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subsys_initcall(shaper_init);
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125
net/shaper/shaper_nl_gen.c
Normal file
125
net/shaper/shaper_nl_gen.c
Normal file
@ -0,0 +1,125 @@
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// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
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/* Do not edit directly, auto-generated from: */
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/* Documentation/netlink/specs/net_shaper.yaml */
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/* YNL-GEN kernel source */
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include "shaper_nl_gen.h"
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#include <uapi/linux/net_shaper.h>
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/* Common nested types */
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const struct nla_policy net_shaper_handle_nl_policy[NET_SHAPER_A_HANDLE_ID + 1] = {
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[NET_SHAPER_A_HANDLE_SCOPE] = NLA_POLICY_MAX(NLA_U32, 3),
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[NET_SHAPER_A_HANDLE_ID] = { .type = NLA_U32, },
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};
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const struct nla_policy net_shaper_leaf_info_nl_policy[NET_SHAPER_A_WEIGHT + 1] = {
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[NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
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[NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
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[NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
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};
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/* NET_SHAPER_CMD_GET - do */
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static const struct nla_policy net_shaper_get_do_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
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||||
[NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
|
||||
};
|
||||
|
||||
/* NET_SHAPER_CMD_GET - dump */
|
||||
static const struct nla_policy net_shaper_get_dump_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
|
||||
[NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
|
||||
};
|
||||
|
||||
/* NET_SHAPER_CMD_SET - do */
|
||||
static const struct nla_policy net_shaper_set_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
|
||||
[NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
|
||||
[NET_SHAPER_A_METRIC] = NLA_POLICY_MAX(NLA_U32, 1),
|
||||
[NET_SHAPER_A_BW_MIN] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_BW_MAX] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_BURST] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
|
||||
};
|
||||
|
||||
/* NET_SHAPER_CMD_DELETE - do */
|
||||
static const struct nla_policy net_shaper_delete_nl_policy[NET_SHAPER_A_IFINDEX + 1] = {
|
||||
[NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
|
||||
};
|
||||
|
||||
/* NET_SHAPER_CMD_GROUP - do */
|
||||
static const struct nla_policy net_shaper_group_nl_policy[NET_SHAPER_A_LEAVES + 1] = {
|
||||
[NET_SHAPER_A_IFINDEX] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_PARENT] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
|
||||
[NET_SHAPER_A_HANDLE] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
|
||||
[NET_SHAPER_A_METRIC] = NLA_POLICY_MAX(NLA_U32, 1),
|
||||
[NET_SHAPER_A_BW_MIN] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_BW_MAX] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_BURST] = { .type = NLA_UINT, },
|
||||
[NET_SHAPER_A_PRIORITY] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_WEIGHT] = { .type = NLA_U32, },
|
||||
[NET_SHAPER_A_LEAVES] = NLA_POLICY_NESTED(net_shaper_leaf_info_nl_policy),
|
||||
};
|
||||
|
||||
/* Ops table for net_shaper */
|
||||
static const struct genl_split_ops net_shaper_nl_ops[] = {
|
||||
{
|
||||
.cmd = NET_SHAPER_CMD_GET,
|
||||
.pre_doit = net_shaper_nl_pre_doit,
|
||||
.doit = net_shaper_nl_get_doit,
|
||||
.post_doit = net_shaper_nl_post_doit,
|
||||
.policy = net_shaper_get_do_nl_policy,
|
||||
.maxattr = NET_SHAPER_A_IFINDEX,
|
||||
.flags = GENL_CMD_CAP_DO,
|
||||
},
|
||||
{
|
||||
.cmd = NET_SHAPER_CMD_GET,
|
||||
.start = net_shaper_nl_pre_dumpit,
|
||||
.dumpit = net_shaper_nl_get_dumpit,
|
||||
.done = net_shaper_nl_post_dumpit,
|
||||
.policy = net_shaper_get_dump_nl_policy,
|
||||
.maxattr = NET_SHAPER_A_IFINDEX,
|
||||
.flags = GENL_CMD_CAP_DUMP,
|
||||
},
|
||||
{
|
||||
.cmd = NET_SHAPER_CMD_SET,
|
||||
.pre_doit = net_shaper_nl_pre_doit,
|
||||
.doit = net_shaper_nl_set_doit,
|
||||
.post_doit = net_shaper_nl_post_doit,
|
||||
.policy = net_shaper_set_nl_policy,
|
||||
.maxattr = NET_SHAPER_A_IFINDEX,
|
||||
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
|
||||
},
|
||||
{
|
||||
.cmd = NET_SHAPER_CMD_DELETE,
|
||||
.pre_doit = net_shaper_nl_pre_doit,
|
||||
.doit = net_shaper_nl_delete_doit,
|
||||
.post_doit = net_shaper_nl_post_doit,
|
||||
.policy = net_shaper_delete_nl_policy,
|
||||
.maxattr = NET_SHAPER_A_IFINDEX,
|
||||
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
|
||||
},
|
||||
{
|
||||
.cmd = NET_SHAPER_CMD_GROUP,
|
||||
.pre_doit = net_shaper_nl_pre_doit,
|
||||
.doit = net_shaper_nl_group_doit,
|
||||
.post_doit = net_shaper_nl_post_doit,
|
||||
.policy = net_shaper_group_nl_policy,
|
||||
.maxattr = NET_SHAPER_A_LEAVES,
|
||||
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
|
||||
},
|
||||
};
|
||||
|
||||
struct genl_family net_shaper_nl_family __ro_after_init = {
|
||||
.name = NET_SHAPER_FAMILY_NAME,
|
||||
.version = NET_SHAPER_FAMILY_VERSION,
|
||||
.netnsok = true,
|
||||
.parallel_ops = true,
|
||||
.module = THIS_MODULE,
|
||||
.split_ops = net_shaper_nl_ops,
|
||||
.n_split_ops = ARRAY_SIZE(net_shaper_nl_ops),
|
||||
};
|
||||
34
net/shaper/shaper_nl_gen.h
Normal file
34
net/shaper/shaper_nl_gen.h
Normal file
@ -0,0 +1,34 @@
|
||||
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
|
||||
/* Do not edit directly, auto-generated from: */
|
||||
/* Documentation/netlink/specs/net_shaper.yaml */
|
||||
/* YNL-GEN kernel header */
|
||||
|
||||
#ifndef _LINUX_NET_SHAPER_GEN_H
|
||||
#define _LINUX_NET_SHAPER_GEN_H
|
||||
|
||||
#include <net/netlink.h>
|
||||
#include <net/genetlink.h>
|
||||
|
||||
#include <uapi/linux/net_shaper.h>
|
||||
|
||||
/* Common nested types */
|
||||
extern const struct nla_policy net_shaper_handle_nl_policy[NET_SHAPER_A_HANDLE_ID + 1];
|
||||
extern const struct nla_policy net_shaper_leaf_info_nl_policy[NET_SHAPER_A_WEIGHT + 1];
|
||||
|
||||
int net_shaper_nl_pre_doit(const struct genl_split_ops *ops,
|
||||
struct sk_buff *skb, struct genl_info *info);
|
||||
void
|
||||
net_shaper_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
|
||||
struct genl_info *info);
|
||||
int net_shaper_nl_pre_dumpit(struct netlink_callback *cb);
|
||||
int net_shaper_nl_post_dumpit(struct netlink_callback *cb);
|
||||
|
||||
int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info);
|
||||
int net_shaper_nl_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
|
||||
int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info);
|
||||
int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info);
|
||||
int net_shaper_nl_group_doit(struct sk_buff *skb, struct genl_info *info);
|
||||
|
||||
extern struct genl_family net_shaper_nl_family;
|
||||
|
||||
#endif /* _LINUX_NET_SHAPER_GEN_H */
|
||||
Loading…
Reference in New Issue
Block a user