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            • Summary
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              • getfamily
              • getpolicy
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              • attr-type
            • Attribute sets
              • ctrl-attrs
                • family-id (u16)
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                • maxattr (u32)
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                • mcast-groups (indexed-array)
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                • op-policy (nest-type-value)
                • op (u32)
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                • id (u32)
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                • policy-idx (u32)
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                • dump (u32)
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The Linux Kernel
  • Kernel subsystem documentation
  • Networking
  • Netlink Family Specifications
  • Family nlctrl netlink specification
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Family nlctrl netlink specification¶

Contents

  • Family nlctrl netlink specification

    • Summary

    • Operations

      • getfamily

      • getpolicy

    • Definitions

      • op-flags

      • attr-type

    • Attribute sets

      • ctrl-attrs

      • mcast-group-attrs

      • op-attrs

      • policy-attrs

      • op-policy-attrs

Summary¶

genetlink meta-family that exposes information about all genetlink families registered in the kernel (including itself).

Operations¶

getfamily¶

Get / dump genetlink families

attribute-set:

ctrl-attrs

do:
request
attributes:

[family-name]

reply
attributes:

[family-id, family-name, hdrsize, maxattr, mcast-groups, ops, version]

dump:
reply
attributes:

[family-id, family-name, hdrsize, maxattr, mcast-groups, ops, version]

getpolicy¶

Get / dump genetlink policies

attribute-set:

ctrl-attrs

dump:
request
attributes:

[family-name, family-id, op]

reply
attributes:

[family-id, op-policy, policy]

Definitions¶

op-flags¶

type:

flags

enum-name:

None

entries:
  • admin-perm

  • cmd-cap-do

  • cmd-cap-dump

  • cmd-cap-haspol

  • uns-admin-perm

attr-type¶

enum-name:

netlink-attribute-type

type:

enum

entries:
  • invalid

  • flag

  • u8

  • u16

  • u32

  • u64

  • s8

  • s16

  • s32

  • s64

  • binary

  • string

  • nul-string

  • nested

  • nested-array

  • bitfield32

  • sint

  • uint

Attribute sets¶

ctrl-attrs¶

family-id (u16)¶

family-name (string)¶

version (u32)¶

hdrsize (u32)¶

maxattr (u32)¶

ops (indexed-array)¶

sub-type:

nest

nested-attributes:

op-attrs

mcast-groups (indexed-array)¶

sub-type:

nest

nested-attributes:

mcast-group-attrs

policy (nest-type-value)¶

type-value:

[‘policy-id’, ‘attr-id’]

nested-attributes:

policy-attrs

op-policy (nest-type-value)¶

type-value:

[‘op-id’]

nested-attributes:

op-policy-attrs

op (u32)¶

mcast-group-attrs¶

name (string)¶

id (u32)¶

op-attrs¶

id (u32)¶

flags (u32)¶

enum:

op-flags

enum-as-flags:

True

policy-attrs¶

type (u32)¶

enum:

attr-type

min-value-s (s64)¶

max-value-s (s64)¶

min-value-u (u64)¶

max-value-u (u64)¶

min-length (u32)¶

max-length (u32)¶

policy-idx (u32)¶

policy-maxtype (u32)¶

bitfield32-mask (u32)¶

mask (u64)¶

pad (pad)¶

op-policy-attrs¶

do (u32)¶

dump (u32)¶

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