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 a value property to mcast-group definitions This schema is very similar to genetlink-legacy and I considered making the changes there and symlinking to it. On balance I felt that might be problematic for accurate schema validation. Signed-off-by: Donald Hunter <donald.hunter@xxxxxxxxx> --- Documentation/netlink/netlink-raw.yaml | 414 +++++++++++++++++++++++++ 1 file changed, 414 insertions(+) create mode 100644 Documentation/netlink/netlink-raw.yaml diff --git a/Documentation/netlink/netlink-raw.yaml b/Documentation/netlink/netlink-raw.yaml new file mode 100644 index 000000000000..ef7bd07eab62 --- /dev/null +++ b/Documentation/netlink/netlink-raw.yaml @@ -0,0 +1,414 @@ +# 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 version 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 + value: + description: Value of the netlink multicast group in the uAPI. + type: integer + # End netlink-raw -- 2.41.0
