Wed, Apr 12, 2017 at 05:06:48PM CEST, dsa@xxxxxxxxxxxxxxxxxxx wrote:
>On 4/12/17 6:34 AM, Johannes Berg wrote:
>> diff --git a/include/uapi/linux/netlink.h b/include/uapi/linux/netlink.h
>> index b2c9c26ea30f..7df88770e029 100644
>> --- a/include/uapi/linux/netlink.h
>> +++ b/include/uapi/linux/netlink.h
>> @@ -69,6 +69,10 @@ struct nlmsghdr {
>> #define NLM_F_CREATE 0x400 /* Create, if it does not exist */
>> #define NLM_F_APPEND 0x800 /* Add to end of list */
>>
>> +/* Flags for ACK message */
>> +#define NLM_F_CAPPED 0x100 /* request was capped */
>> +#define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */
>> +
>> /*
>> 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
>> 4.4BSD CHANGE NLM_F_REPLACE
>> @@ -101,6 +105,33 @@ struct nlmsghdr {
>> struct nlmsgerr {
>> int error;
>> struct nlmsghdr msg;
>> + /*
>> + * followed by the message contents unless NETLINK_CAP_ACK was set
>> + * or the ACK indicates success (error == 0)
>> + * message length is aligned with NLMSG_ALIGN()
>> + */
>> + /*
>> + * followed by TLVs defined in enum nlmsgerr_attrs
>> + * if NETLINK_EXT_ACK was set
>> + */
>> +};
>> +
>> +/**
>> + * enum nlmsgerr_attrs - nlmsgerr attributes
>> + * @NLMSGERR_ATTR_UNUSED: unused
>> + * @NLMSGERR_ATTR_MSG: error message string (string)
>> + * @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original
>> + * message, counting from the beginning of the header (u32)
>> + * @__NLMSGERR_ATTR_MAX: number of attributes
>> + * @NLMSGERR_ATTR_MAX: highest attribute number
>> + */
>> +enum nlmsgerr_attrs {
>> + NLMSGERR_ATTR_UNUSED,
>> + NLMSGERR_ATTR_MSG,
>
>There was a discussion about side effects of adding strings (bloat,
>internationalization). Should ATTR_MSG be removed until that is ironed
>out? Leaving it in suggests it is ok to start adding strings.
I believe that we need strings right away. Without them, this patchset
really does not make much sense.
