Phil Sutter <phil@xxxxxx> wrote: > Struct netlink_callback has a 48byte scratch area for use by dump > callbacks to keep personal stuff. > > In rule dumps set up by nf_tables_getrule(), this is used only to store > a cursor into the list of rules being dumped. Other data is allocated > and the pointer value assigned to struct netlink_callback::data. > > Since the allocated data structure is small and fits into the scratch > area even after adding some more fields, move it there. > > Patch 1 "simplifies" nf_tables_dump_rules_start() a bit, but actually > exists only to reduce patch 5's size. > > Patch 2 is more or less fallout: The memset would mess things up after > this series, but it was pointless in the first place. > > Patches 3 and 4 extend struct nft_rule_dump_ctx and make > struct netlink_callback's scratch area unused. > > Patch 5 then finally eliminates the allocation. > > All this is early preparation for reset command locking but unrelated > enough to go alone. LGTM, I've applied this to nf-next:testing to have the buildbots check it out.
