[PATCH nftables 0/8] add typeof keyword

[Florian Westphal <fw@strlen.de>]

This patch series adds the typeof keyword.

The only dependency is a small change to libnftnl to add two new
UDATA_SET_TYPEOF enum values.

named set can be configured as follows:

set os {
   type typeof(osf name)
   elements = { "Linux", "Windows" }
}

or
nft add set ip filter allowed "{ type typeof(ip daddr) . typeof(tcp dport); }"

... which is the same as the "old" 'type ipv4_addr . inet_service".

The type is stored in the kernel via the udata set infrastructure,
on listing -- if a udata type is present -- nft will validate that this
type matches the set key length.

This initial submission doesn't include a documentation update because
I'd like to get feedback on the chosen syntax first.

Florian Westphal (8):
      src: libnftnl: run single-initcalls only once
      src: libnftnl: split nft_ctx_new/free
      src: store expr, not dtype to track data in sets
      src: parser: add syntax to provide bitsize for non-spcific types
      src: add "typeof" keyword
      src: add "typeof" print support
      src: netlink: remove assertion
      tests: add typeof test cases

 include/datatype.h                                 |    1 
 include/netlink.h                                  |    1 
 include/nftables.h                                 |    3 
 include/rule.h                                     |    6 
 src/datatype.c                                     |    5 
 src/evaluate.c                                     |   58 ++++--
 src/expression.c                                   |    2 
 src/json.c                                         |    4 
 src/libnftables.c                                  |   48 +++--
 src/mnl.c                                          |   39 ++++
 src/monitor.c                                      |    2 
 src/netlink.c                                      |  176 ++++++++++++++++++---
 src/netlink_delinearize.c                          |   15 +
 src/parser_bison.y                                 |   26 ++-
 src/parser_json.c                                  |    8 
 src/rule.c                                         |   35 +++-
 src/scanner.l                                      |    1 
 src/segtree.c                                      |    8 
 tests/shell/testcases/maps/dumps/typeof_maps_0.nft |   16 +
 tests/shell/testcases/maps/typeof_maps_0           |   26 +++
 tests/shell/testcases/sets/dumps/typeof_sets_0.nft |   31 +++
 tests/shell/testcases/sets/typeof_sets_0           |   40 ++++
 22 files changed, 459 insertions(+), 92 deletions(-)