On 4/22/24 7:48 AM, Jakub Kicinski wrote: > On Sun, 21 Apr 2024 13:32:24 -0600 David Ahern wrote: >> On 4/21/24 1:17 PM, Eric Dumazet wrote: >>> I wonder if NLM_F_DUMP_FILTERED should not be reported to user space ? >> >> good point. We do set that flag for other dumps when a filter has been >> used to limit data returned. > > That flag appears to be a, hm, historic workaround? > If I was to guess what the motivation was I'd say that it's because > "old school netlink" didn't reject unknown attributes. And you wanted > to know whether the kernel did the filtering or you have to filter > again in user space? Am I close? :) close enough based on what I can recall. > > The flag is mostly used in the IP stack, I'd rather try to deprecate > it than propagate it to new genetlink families which do full input > validation, rendering the flag 100% unnecessary.
