From: Jiri Pirko <jiri@resnulli.us>
To: Michal Kubecek <mkubecek@suse.cz>
Cc: David Miller <davem@davemloft.net>,
netdev@vger.kernel.org,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
John Linville <linville@tuxdriver.com>,
Stephen Hemminger <stephen@networkplumber.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v5 10/22] ethtool: generic handlers for GET requests
Date: Wed, 27 Mar 2019 17:35:07 +0100 [thread overview]
Message-ID: <20190327163507.GE14297@nanopsycho> (raw)
In-Reply-To: <bda9c044a590ed61caa43c37d32b3b7f2b6326c5.1553532199.git.mkubecek@suse.cz>
Mon, Mar 25, 2019 at 06:08:24PM CET, mkubecek@suse.cz wrote:
>Some parts of processing GET type requests and related notifications are
>independent of a command. Provide universal functions so that only four
>callbacks need to be defined for each command type:
>
> parse_request() - parse incoming message
> prepare_data() - retrieve data from driver or NIC
> reply_size() - estimate reply message size
> fill_reply() - compose reply message
>
>These callback are defined in an instance of struct get_request_ops.
>
>Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
[...]
>+/**
>+ * struct get_request_ops - unified handling of GET requests
>+ * @request_cmd: command id for request (GET)
>+ * @reply_cmd: command id for reply (SET)
>+ * @dev_attr: attribute type for device specification
>+ * @data_size: total length of data structure
>+ * @repdata_offset: offset of "reply data" part (struct common_reply_data)
>+ * @allow_nodev_do: do not fail if device is not specified for non-dump request
>+ * @parse_request:
>+ * parse request message and fill request info; request info is zero
>+ * initialized on entry except reply_data pointer (which is initialized)
>+ * @prepare_data:
>+ * retrieve data needed to compose a reply message; reply data are zero
>+ * initialized on entry except for @dev
>+ * @reply_size:
>+ * return size of reply message payload without device specification;
>+ * returned size may be bigger than actual reply size but it must suffice
>+ * to hold the reply
>+ * @fill_reply:
>+ * fill reply message payload using the data prepared by @prepare_data()
>+ * @cleanup
>+ * (optional) called when data are no longer needed; use e.g. to free
>+ * any additional data structures allocated in prepare_data() which are
>+ * not part of the main structure
>+ *
>+ * Description of variable parts of GET request handling when using the unified
>+ * infrastructure. When used, a pointer to an instance of this structure is to
>+ * be added to &get_requests array, generic handlers ethnl_get_doit(),
>+ * ethnl_get_dumpit(), ethnl_get_start() and ethnl_get_done() used in
>+ * @ethnl_genl_ops and (optionally) ethnl_std_notify() as notification handler
>+ * in ðnl_notify_handlers.
>+ */
>+struct get_request_ops {
First of all, please maintain the ethnl prefix. Not only here, but also
for other structs and functions (common_req_info, parse_*, etc).
But I must ask, why do we need this wrappers of ops around ops?
I believe it would be much nicer to use genl ops directly and do the
common work in pre_doit and and post_doit. Please see devlink.c for
examples.
Wrappers are unfortunately quite common in this patchset. Most of the
time, they do things much harder to follow and understand :(
>+ u8 request_cmd;
>+ u8 reply_cmd;
>+ u16 dev_attrtype;
>+ unsigned int data_size;
>+ unsigned int repdata_offset;
>+ bool allow_nodev_do;
>+
>+ int (*parse_request)(struct common_req_info *req_info,
>+ struct sk_buff *skb, struct genl_info *info,
>+ const struct nlmsghdr *nlhdr);
>+ int (*prepare_data)(struct common_req_info *req_info,
>+ struct genl_info *info);
>+ int (*reply_size)(const struct common_req_info *req_info);
>+ int (*fill_reply)(struct sk_buff *skb,
>+ const struct common_req_info *req_info);
>+ void (*cleanup)(struct common_req_info *req_info);
>+};
>+
> #endif /* _NET_ETHTOOL_NETLINK_H */
>--
>2.21.0
>
next prev parent reply other threads:[~2019-03-27 16:35 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-25 17:07 [PATCH net-next v5 00/22] ethtool netlink interface, part 1 Michal Kubecek
2019-03-25 17:07 ` [PATCH net-next v5 01/22] rtnetlink: provide permanent hardware address in RTM_NEWLINK Michal Kubecek
2019-03-26 10:08 ` Jiri Pirko
2019-03-26 10:31 ` Michal Kubecek
2019-03-26 11:38 ` Jiri Pirko
2019-03-26 19:46 ` David Miller
2019-03-25 17:08 ` [PATCH net-next v5 02/22] netlink: introduce nla_put_bitfield32() Michal Kubecek
2019-03-26 10:09 ` Jiri Pirko
2019-03-28 1:56 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 03/22] netlink: add strict version of nla_parse_nested() Michal Kubecek
2019-03-26 10:11 ` Jiri Pirko
2019-03-28 1:57 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 04/22] ethtool: move to its own directory Michal Kubecek
2019-03-26 10:14 ` Jiri Pirko
2019-03-28 1:57 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 05/22] ethtool: introduce ethtool netlink interface Michal Kubecek
2019-03-26 12:09 ` Jiri Pirko
2019-03-26 13:24 ` Michal Kubecek
2019-03-26 13:42 ` Jiri Pirko
2019-03-27 9:26 ` Michal Kubecek
2019-03-27 9:50 ` Jiri Pirko
2019-03-28 2:05 ` Florian Fainelli
2019-03-28 8:10 ` Jiri Pirko
2019-03-28 9:37 ` Michal Kubecek
2019-03-28 13:23 ` Jiri Pirko
2019-03-28 17:00 ` Florian Fainelli
2019-03-28 17:28 ` Jiri Pirko
2019-03-26 16:36 ` Jiri Pirko
2019-03-26 17:32 ` Michal Kubecek
2019-03-27 9:26 ` Jiri Pirko
2019-03-25 17:08 ` [PATCH net-next v5 06/22] ethtool: helper functions for " Michal Kubecek
2019-03-26 12:38 ` Jiri Pirko
2019-03-26 14:19 ` Michal Kubecek
2019-03-26 16:22 ` Jiri Pirko
2019-03-25 17:08 ` [PATCH net-next v5 07/22] ethtool: netlink bitset handling Michal Kubecek
2019-03-26 15:59 ` Jiri Pirko
2019-03-26 17:59 ` Michal Kubecek
2019-03-27 9:57 ` Jiri Pirko
2019-03-27 10:19 ` Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 08/22] ethtool: support for netlink notifications Michal Kubecek
2019-03-26 16:34 ` Jiri Pirko
2019-03-26 18:17 ` Michal Kubecek
2019-03-27 9:38 ` Jiri Pirko
2019-03-27 9:51 ` Andrew Lunn
2019-03-27 10:04 ` Jiri Pirko
2019-03-27 10:16 ` Andrew Lunn
2019-03-27 10:41 ` Jiri Pirko
2019-03-27 9:59 ` Michal Kubecek
2019-03-27 10:43 ` Jiri Pirko
2019-03-25 17:08 ` [PATCH net-next v5 09/22] ethtool: implement EVENT notifications Michal Kubecek
2019-03-27 13:04 ` Jiri Pirko
2019-03-27 14:14 ` Michal Kubecek
2019-03-28 2:14 ` Florian Fainelli
2019-03-28 6:41 ` Michal Kubecek
2019-03-28 9:16 ` Jiri Pirko
2019-03-25 17:08 ` [PATCH net-next v5 10/22] ethtool: generic handlers for GET requests Michal Kubecek
2019-03-27 16:35 ` Jiri Pirko [this message]
2019-03-27 21:53 ` Michal Kubecek
2019-03-28 13:32 ` Jiri Pirko
2019-03-25 17:08 ` [PATCH net-next v5 11/22] ethtool: move string arrays into common file Michal Kubecek
2019-03-28 2:17 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 12/22] ethtool: provide string sets with GET_STRSET request Michal Kubecek
2019-03-27 20:12 ` Jiri Pirko
2019-03-27 22:56 ` Michal Kubecek
2019-03-29 8:43 ` Jiri Pirko
2019-03-28 2:25 ` Florian Fainelli
2019-03-28 7:18 ` Michal Kubecek
2019-03-28 13:43 ` Jiri Pirko
2019-03-28 14:04 ` Michal Kubecek
2019-03-28 17:35 ` Jiri Pirko
2019-03-28 18:52 ` Jakub Kicinski
2019-03-28 20:43 ` Michal Kubecek
2019-03-28 21:06 ` Jakub Kicinski
2019-03-29 6:52 ` Jiri Pirko
2019-03-28 22:28 ` Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 13/22] ethtool: provide driver/device information in GET_INFO request Michal Kubecek
2019-03-27 20:14 ` Jiri Pirko
2019-03-27 22:25 ` Michal Kubecek
2019-03-28 2:30 ` Florian Fainelli
2019-03-28 9:21 ` Jiri Pirko
2019-03-28 9:53 ` Michal Kubecek
2019-03-28 16:34 ` Jiri Pirko
2019-03-28 20:09 ` Jakub Kicinski
2019-03-28 22:46 ` Michal Kubecek
2019-03-29 18:48 ` Jakub Kicinski
2019-03-29 18:53 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 14/22] ethtool: provide timestamping " Michal Kubecek
2019-03-28 3:36 ` Florian Fainelli
2019-03-28 10:03 ` Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 15/22] ethtool: provide link mode names as a string set Michal Kubecek
2019-03-28 3:52 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 16/22] ethtool: provide link settings and link modes in GET_SETTINGS request Michal Kubecek
2019-03-28 3:44 ` Florian Fainelli
2019-03-28 10:04 ` Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 17/22] ethtool: set link settings and link modes with SET_SETTINGS request Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 18/22] ethtool: provide link state in GET_SETTINGS request Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 19/22] ethtool: provide WoL information " Michal Kubecek
2019-03-28 3:42 ` Florian Fainelli
2019-03-28 10:10 ` Michal Kubecek
2019-03-25 17:08 ` [PATCH net-next v5 20/22] ethtool: set WoL settings with SET_SETTINGS request Michal Kubecek
2019-03-28 3:49 ` Florian Fainelli
2019-03-25 17:08 ` [PATCH net-next v5 21/22] ethtool: provide message level in GET_SETTINGS request Michal Kubecek
2019-03-28 3:46 ` Florian Fainelli
2019-03-25 17:09 ` [PATCH net-next v5 22/22] ethtool: set message level with SET_SETTINGS request Michal Kubecek
2019-03-28 3:48 ` Florian Fainelli
2019-03-27 13:09 ` [PATCH net-next v5 00/22] ethtool netlink interface, part 1 Jiri Pirko
2019-03-27 14:28 ` Michal Kubecek
2019-03-27 15:19 ` Jiri Pirko
2019-03-27 19:12 ` David Miller
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