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Message-ID: <20230810233845.2318049-1-kuba@kernel.org> Date: Thu, 10 Aug 2023 16:38:35 -0700 From: Jakub Kicinski <kuba@...nel.org> To: davem@...emloft.net Cc: netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com, jiri@...nulli.us, johannes@...solutions.net, Jakub Kicinski <kuba@...nel.org> Subject: [PATCH net-next v2 00/10] genetlink: provide struct genl_info to dumps One of the biggest (which is not to say only) annoyances with genetlink handling today is that doit and dumpit need some of the same information, but it is passed to them in completely different structs. The implementations commonly end up writing a _fill() method which populates a message and have to pass at least 6 parameters. 3 of which are extracted manually from request info. After a lot of umming and ahing I decided to populate struct genl_info for dumps, without trying to factor out only the common parts. This makes the adoption easiest. In the future we may add a new version of dump which takes struct genl_info *info as the second argument, instead of struct netlink_callback *cb. For now developers have to call genl_info_dump(cb) to get the info. Typical genetlink families no longer get exposed to netlink protocol internals like pid and seq numbers. v2: - replace the GENL_INFO_NTF() macro with init helper - fix the commit messages v1: https://lore.kernel.org/all/20230809182648.1816537-1-kuba@kernel.org/ Jakub Kicinski (10): genetlink: push conditional locking into dumpit/done genetlink: make genl_info->nlhdr const genetlink: remove userhdr from struct genl_info genetlink: add struct genl_info to struct genl_dumpit_info genetlink: use attrs from struct genl_info genetlink: add a family pointer to struct genl_info genetlink: add genlmsg_iput() API netdev-genl: use struct genl_info for reply construction ethtool: netlink: simplify arguments to ethnl_default_parse() ethtool: netlink: always pass genl_info to .prepare_data drivers/block/drbd/drbd_nl.c | 9 +-- drivers/net/wireguard/netlink.c | 2 +- include/net/genetlink.h | 76 ++++++++++++++++++-- net/core/netdev-genl.c | 17 +++-- net/devlink/health.c | 2 +- net/devlink/leftover.c | 6 +- net/ethtool/channels.c | 2 +- net/ethtool/coalesce.c | 6 +- net/ethtool/debug.c | 2 +- net/ethtool/eee.c | 2 +- net/ethtool/eeprom.c | 9 ++- net/ethtool/features.c | 2 +- net/ethtool/fec.c | 2 +- net/ethtool/linkinfo.c | 2 +- net/ethtool/linkmodes.c | 2 +- net/ethtool/linkstate.c | 2 +- net/ethtool/mm.c | 2 +- net/ethtool/module.c | 5 +- net/ethtool/netlink.c | 33 ++++----- net/ethtool/netlink.h | 2 +- net/ethtool/pause.c | 5 +- net/ethtool/phc_vclocks.c | 2 +- net/ethtool/plca.c | 4 +- net/ethtool/privflags.c | 2 +- net/ethtool/pse-pd.c | 6 +- net/ethtool/rings.c | 5 +- net/ethtool/rss.c | 3 +- net/ethtool/stats.c | 5 +- net/ethtool/strset.c | 2 +- net/ethtool/tsinfo.c | 2 +- net/ethtool/tunnels.c | 2 +- net/ethtool/wol.c | 5 +- net/ieee802154/nl802154.c | 4 +- net/ncsi/ncsi-netlink.c | 2 +- net/ncsi/ncsi-netlink.h | 2 +- net/netlink/genetlink.c | 119 +++++++++++++++----------------- net/nfc/netlink.c | 4 +- net/openvswitch/conntrack.c | 2 +- net/openvswitch/datapath.c | 29 ++++---- net/openvswitch/meter.c | 10 +-- net/tipc/netlink_compat.c | 4 +- net/tipc/node.c | 4 +- net/tipc/socket.c | 2 +- net/tipc/udp_media.c | 2 +- 44 files changed, 234 insertions(+), 178 deletions(-) -- 2.41.0
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