Re: [RFC net-next] bonding: netlink error message support for options

[Stephen Hemminger]

On Tue, 17 May 2022 16:31:19 -0400
Jonathan Toppins <jtoppins@xxxxxxxxxx> wrote:

>     This is an RFC because the current NL_SET_ERR_MSG() macros do not support
>     printf like semantics so I rolled my own buffer setting in __bond_opt_set().
>     The issue is I could not quite figure out the life-cycle of the buffer, if
>     rtnl lock is held until after the text buffer is copied into the packet
>     then we are ok, otherwise, some other type of buffer management scheme will
>     be needed as this could result in corrupted error messages when modifying
>     multiple bonds.

Might be better for others in long term if NL_SET_ERR_MSG() had printf like
semantics. Surely this isn't going to be first or last case.

Then internally, it could print right to the netlink message.