diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2022-08-26 06:09:31 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-08-30 13:20:43 +0300 |
| commit | 690252f19f0e486abb8590b3a7a03d4e065d93d4 (patch) | |
| tree | a656cf7a2cec54ed3ff0ff28df4c9176c0228763 /include/uapi/linux/netlink.h | |
| parent | 0c95cea24f30eb28d464c593d8fbd64cd305791b (diff) | |
| download | linux-690252f19f0e486abb8590b3a7a03d4e065d93d4.tar.xz | |
netlink: add support for ext_ack missing attributes
There is currently no way to report via extack in a structured way
that an attribute is missing. This leads to families resorting to
string messages.
Add a pair of attributes - @offset and @type for machine-readable
way of reporting missing attributes. The @offset points to the
nest which should have contained the attribute, @type is the
expected nla_type. The offset will be skipped if the attribute
is missing at the message level rather than inside a nest.
User space should be able to figure out which attribute enum
(AKA attribute space AKA attribute set) the nest pointed to by
@offset is using.
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/uapi/linux/netlink.h')
| -rw-r--r-- | include/uapi/linux/netlink.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h index e0ab261ceca2..e0689dbd2cde 100644 --- a/include/uapi/linux/netlink.h +++ b/include/uapi/linux/netlink.h @@ -140,6 +140,10 @@ struct nlmsgerr { * be used - in the success case - to identify a created * object or operation or similar (binary) * @NLMSGERR_ATTR_POLICY: policy for a rejected attribute + * @NLMSGERR_ATTR_MISS_TYPE: type of a missing required attribute, + * %NLMSGERR_ATTR_MISS_NEST will not be present if the attribute was + * missing at the message level + * @NLMSGERR_ATTR_MISS_NEST: offset of the nest where attribute was missing * @__NLMSGERR_ATTR_MAX: number of attributes * @NLMSGERR_ATTR_MAX: highest attribute number */ @@ -149,6 +153,8 @@ enum nlmsgerr_attrs { NLMSGERR_ATTR_OFFS, NLMSGERR_ATTR_COOKIE, NLMSGERR_ATTR_POLICY, + NLMSGERR_ATTR_MISS_TYPE, + NLMSGERR_ATTR_MISS_NEST, __NLMSGERR_ATTR_MAX, NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1 |