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+# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+%YAML 1.2
+---
+$id: http://kernel.org/schemas/netlink/genetlink-legacy.yaml#
+$schema: https://json-schema.org/draft-07/schema
+
+# Common defines
+$defs:
+ uint:
+ type: integer
+ minimum: 0
+ len-or-define:
+ type: [ string, integer ]
+ pattern: ^[0-9A-Za-z_]+( - 1)?$
+ minimum: 0
+
+# Schema for specs
+title: Protocol
+description: Specification of a genetlink protocol
+type: object
+required: [ name, doc, attribute-sets, operations ]
+additionalProperties: False
+properties:
+ name:
+ description: Name of the genetlink family.
+ type: string
+ doc:
+ type: string
+ version:
+ description: Generic Netlink family version. Default is 1.
+ type: integer
+ minimum: 1
+ protocol:
+ description: Schema compatibility level. Default is "genetlink".
+ enum: [ genetlink, genetlink-c, genetlink-legacy, netlink-raw ] # Trim
+ # Start netlink-raw
+ protonum:
+ description: Protocol number to use for netlink-raw
+ type: integer
+ # End netlink-raw
+ uapi-header:
+ description: Path to the uAPI header, default is linux/${family-name}.h
+ type: string
+ # Start genetlink-c
+ c-family-name:
+ description: Name of the define for the family name.
+ type: string
+ c-version-name:
+ description: Name of the define for the verion of the family.
+ type: string
+ max-by-define:
+ description: Makes the number of attributes and commands be specified by a define, not an enum value.
+ type: boolean
+ # End genetlink-c
+ # Start genetlink-legacy
+ kernel-policy:
+ description: |
+ Defines if the input policy in the kernel is global, per-operation, or split per operation type.
+ Default is split.
+ enum: [ split, per-op, global ]
+ # End genetlink-legacy
+
+ definitions:
+ description: List of type and constant definitions (enums, flags, defines).
+ type: array
+ items:
+ type: object
+ required: [ type, name ]
+ additionalProperties: False
+ properties:
+ name:
+ type: string
+ header:
+ description: For C-compatible languages, header which already defines this value.
+ type: string
+ type:
+ enum: [ const, enum, flags, struct ] # Trim
+ doc:
+ type: string
+ # For const
+ value:
+ description: For const - the value.
+ type: [ string, integer ]
+ # For enum and flags
+ value-start:
+ description: For enum or flags the literal initializer for the first value.
+ type: [ string, integer ]
+ entries:
+ description: For enum or flags array of values.
+ type: array
+ items:
+ oneOf:
+ - type: string
+ - type: object
+ required: [ name ]
+ additionalProperties: False
+ properties:
+ name:
+ type: string
+ value:
+ type: integer
+ doc:
+ type: string
+ render-max:
+ description: Render the max members for this enum.
+ type: boolean
+ # Start genetlink-c
+ enum-name:
+ description: Name for enum, if empty no name will be used.
+ type: [ string, "null" ]
+ name-prefix:
+ description: For enum the prefix of the values, optional.
+ type: string
+ # End genetlink-c
+ # Start genetlink-legacy
+ members:
+ description: List of struct members. Only scalars and strings members allowed.
+ type: array
+ items:
+ type: object
+ required: [ name, type ]
+ additionalProperties: False
+ properties:
+ name:
+ type: string
+ type:
+ description: The netlink attribute type
+ enum: [ u8, u16, u32, u64, s8, s16, s32, s64, string, binary ]
+ len:
+ $ref: '#/$defs/len-or-define'
+ byte-order:
+ enum: [ little-endian, big-endian ]
+ doc:
+ description: Documentation for the struct member attribute.
+ type: string
+ enum:
+ description: Name of the enum type used for the attribute.
+ type: string
+ enum-as-flags:
+ description: |
+ Treat the enum as flags. In most cases enum is either used as flags or as values.
+ Sometimes, however, both forms are necessary, in which case header contains the enum
+ form while specific attributes may request to convert the values into a bitfield.
+ type: boolean
+ display-hint: &display-hint
+ description: |
+ Optional format indicator that is intended only for choosing
+ the right formatting mechanism when displaying values of this
+ type.
+ enum: [ hex, mac, fddi, ipv4, ipv6, uuid ]
+ # End genetlink-legacy
+
+ attribute-sets:
+ description: Definition of attribute spaces for this family.
+ type: array
+ items:
+ description: Definition of a single attribute space.
+ type: object
+ required: [ name, attributes ]
+ additionalProperties: False
+ properties:
+ name:
+ description: |
+ Name used when referring to this space in other definitions, not used outside of the spec.
+ type: string
+ name-prefix:
+ description: |
+ Prefix for the C enum name of the attributes. Default family[name]-set[name]-a-
+ type: string
+ enum-name:
+ description: Name for the enum type of the attribute.
+ type: string
+ doc:
+ description: Documentation of the space.
+ type: string
+ subset-of:
+ description: |
+ Name of another space which this is a logical part of. Sub-spaces can be used to define
+ a limited group of attributes which are used in a nest.
+ type: string
+ # Start genetlink-c
+ attr-cnt-name:
+ description: The explicit name for constant holding the count of attributes (last attr + 1).
+ type: string
+ attr-max-name:
+ description: The explicit name for last member of attribute enum.
+ type: string
+ # End genetlink-c
+ attributes:
+ description: List of attributes in the space.
+ type: array
+ items:
+ type: object
+ required: [ name, type ]
+ additionalProperties: False
+ properties:
+ name:
+ type: string
+ type: &attr-type
+ description: The netlink attribute type
+ enum: [ unused, pad, flag, binary, u8, u16, u32, u64, s32, s64,
+ string, nest, array-nest, nest-type-value ]
+ doc:
+ description: Documentation of the attribute.
+ type: string
+ value:
+ description: Value for the enum item representing this attribute in the uAPI.
+ $ref: '#/$defs/uint'
+ type-value:
+ description: Name of the value extracted from the type of a nest-type-value attribute.
+ type: array
+ items:
+ type: string
+ byte-order:
+ enum: [ little-endian, big-endian ]
+ multi-attr:
+ type: boolean
+ nested-attributes:
+ description: Name of the space (sub-space) used inside the attribute.
+ type: string
+ enum:
+ description: Name of the enum type used for the attribute.
+ type: string
+ enum-as-flags:
+ description: |
+ Treat the enum as flags. In most cases enum is either used as flags or as values.
+ Sometimes, however, both forms are necessary, in which case header contains the enum
+ form while specific attributes may request to convert the values into a bitfield.
+ type: boolean
+ checks:
+ description: Kernel input validation.
+ type: object
+ additionalProperties: False
+ properties:
+ flags-mask:
+ description: Name of the flags constant on which to base mask (unsigned scalar types only).
+ type: string
+ min:
+ description: Min value for an integer attribute.
+ type: integer
+ min-len:
+ description: Min length for a binary attribute.
+ $ref: '#/$defs/len-or-define'
+ max-len:
+ description: Max length for a string or a binary attribute.
+ $ref: '#/$defs/len-or-define'
+ sub-type: *attr-type
+ display-hint: *display-hint
+ # Start genetlink-c
+ name-prefix:
+ type: string
+ # End genetlink-c
+ # Start genetlink-legacy
+ struct:
+ description: Name of the struct type used for the attribute.
+ type: string
+ # End genetlink-legacy
+
+ # Make sure name-prefix does not appear in subsets (subsets inherit naming)
+ dependencies:
+ name-prefix:
+ not:
+ required: [ subset-of ]
+ subset-of:
+ not:
+ required: [ name-prefix ]
+
+ operations:
+ description: Operations supported by the protocol.
+ type: object
+ required: [ list ]
+ additionalProperties: False
+ properties:
+ enum-model:
+ description: |
+ The model of assigning values to the operations.
+ "unified" is the recommended model where all message types belong
+ to a single enum.
+ "directional" has the messages sent to the kernel and from the kernel
+ enumerated separately.
+ enum: [ unified, directional ] # Trim
+ name-prefix:
+ description: |
+ Prefix for the C enum name of the command. The name is formed by concatenating
+ the prefix with the upper case name of the command, with dashes replaced by underscores.
+ type: string
+ enum-name:
+ description: Name for the enum type with commands.
+ type: string
+ async-prefix:
+ description: Same as name-prefix but used to render notifications and events to separate enum.
+ type: string
+ async-enum:
+ description: Name for the enum type with notifications/events.
+ type: string
+ # Start genetlink-legacy
+ fixed-header: &fixed-header
+ description: |
+ Name of the structure defining the optional fixed-length protocol
+ header. This header is placed in a message after the netlink and
+ genetlink headers and before any attributes.
+ type: string
+ # End genetlink-legacy
+ list:
+ description: List of commands
+ type: array
+ items:
+ type: object
+ additionalProperties: False
+ required: [ name, doc ]
+ properties:
+ name:
+ description: Name of the operation, also defining its C enum value in uAPI.
+ type: string
+ doc:
+ description: Documentation for the command.
+ type: string
+ value:
+ description: Value for the enum in the uAPI.
+ $ref: '#/$defs/uint'
+ attribute-set:
+ description: |
+ Attribute space from which attributes directly in the requests and replies
+ to this command are defined.
+ type: string
+ flags: &cmd_flags
+ description: Command flags.
+ type: array
+ items:
+ enum: [ admin-perm ]
+ dont-validate:
+ description: Kernel attribute validation flags.
+ type: array
+ items:
+ enum: [ strict, dump ]
+ # Start genetlink-legacy
+ fixed-header: *fixed-header
+ # End genetlink-legacy
+ do: &subop-type
+ description: Main command handler.
+ type: object
+ additionalProperties: False
+ properties:
+ request: &subop-attr-list
+ description: Definition of the request message for a given command.
+ type: object
+ additionalProperties: False
+ properties:
+ attributes:
+ description: |
+ Names of attributes from the attribute-set (not full attribute
+ definitions, just names).
+ type: array
+ items:
+ type: string
+ # Start genetlink-legacy
+ value:
+ description: |
+ ID of this message if value for request and response differ,
+ i.e. requests and responses have different message enums.
+ $ref: '#/$defs/uint'
+ # End genetlink-legacy
+ reply: *subop-attr-list
+ pre:
+ description: Hook for a function to run before the main callback (pre_doit or start).
+ type: string
+ post:
+ description: Hook for a function to run after the main callback (post_doit or done).
+ type: string
+ dump: *subop-type
+ notify:
+ description: Name of the command sharing the reply type with this notification.
+ type: string
+ event:
+ type: object
+ additionalProperties: False
+ properties:
+ attributes:
+ description: Explicit list of the attributes for the notification.
+ type: array
+ items:
+ type: string
+ mcgrp:
+ description: Name of the multicast group generating given notification.
+ type: string
+ mcast-groups:
+ description: List of multicast groups.
+ type: object
+ required: [ list ]
+ additionalProperties: False
+ properties:
+ list:
+ description: List of groups.
+ type: array
+ items:
+ type: object
+ required: [ name ]
+ additionalProperties: False
+ properties:
+ name:
+ description: |
+ The name for the group, used to form the define and the value of the define.
+ type: string
+ # Start genetlink-c
+ c-define-name:
+ description: Override for the name of the define in C uAPI.
+ type: string
+ # End genetlink-c
+ flags: *cmd_flags
+ # Start netlink-raw
+ id:
+ description: Id of the netlink multicast group
+ type: integer
+ # End netlink-raw
This schema is largely a copy of the genetlink-legacy schema with the following additions: - a top-level protonum property, e.g. 0 (for NETLINK_ROUTE) - add netlink-raw to the list of protocols supported by the schema - add an id property to mcast-group definitions Signed-off-by: Donald Hunter <donald.hunter@gmail.com> --- Documentation/netlink/netlink-raw.yaml | 414 +++++++++++++++++++++++++ 1 file changed, 414 insertions(+) create mode 100644 Documentation/netlink/netlink-raw.yaml