From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Yuanhan Liu <yliu@fridaylinux.org>
Cc: dev@dpdk.org, Stephen Hemminger <stephen@networkplumber.org>,
Bruce Richardson <bruce.richardson@intel.com>,
Anatoly Burakov <anatoly.burakov@intel.com>,
Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [dpdk-dev] [PATCH v10 20/20] ethdev: add control interface support
Date: Thu, 20 Jul 2017 15:55:15 +0100 [thread overview]
Message-ID: <092bbf4e-f448-7289-1df6-ec7c4cf747f7@intel.com> (raw)
In-Reply-To: <20170708062859.GB11626@yliu-home>
On 7/8/2017 7:28 AM, Yuanhan Liu wrote:
> On Tue, Jul 04, 2017 at 05:13:37PM +0100, Ferruh Yigit wrote:
>> @@ -157,8 +164,12 @@ rte_eth_dev_pci_generic_probe(struct rte_pci_device *pci_dev,
>>
>> RTE_FUNC_PTR_OR_ERR_RET(*dev_init, -EINVAL);
>> ret = dev_init(eth_dev);
>> - if (ret)
>> + if (ret) {
>> rte_eth_dev_pci_release(eth_dev);
>> + return ret;
>> + }
>> +
>> + rte_eth_control_interface_create(eth_dev->data->port_id);
>
> Hi,
>
> So you are creating a virtual kernel interface for each PCI port. What
> about the VDEVs? If you plan to create one for each port, why not create
> it at the stage while allocating the eth device, or at the stage while
> starting the port if the former is too earlier?
Technically it is possible to support vdevs, but I don't know if there
is usecase for it. If this is required, the change is simple, as you
said this can be possible by moving create API to port start.
>
> Another thing comes to my mind is have you tried it with multi-process
> model? Looks like it will create the control interface twice? Or it will
> just be failed since the interface already exists?
I didn't test mult-process scenarios, I will test.
>
>
> I also have few questions regarding the whole design. So seems that the
> ctrl_if only exports two APIs and they all will be only used in the EAL
> layer. Thus, one question is did you plan to let APP use them? Judging
> EAL already calls them automatically, I don't think it makes sense to
> let the APP call it again. That being said, what's the point of the making
> it be an lib? Why not just put it under EAL or somewhere else, and let
> EAL invoke it as normal helper functions (instead of by public APIs)?
Public APIs are from previous version of the patchset, where user
application was in control on create/destroy and processing messages.
With interfaces automatically created as you said these APIs are not
very meaningful for application.
But code is not so small to put into another library, I believe it is
good to separate this code.
>
> I will avoid adding a new lib if possible. Otherwise, it increases the
> chance of ABI/API breakage is needed in future for extensions.
Those API are required for other libraries, not sure how to include the
code otherwise.
>
> The same question goes to the ethtool lib. Since your solution can work
> well with the well-known ethtool, which is also way more widely available
> than the DPDK ethtool app, what's the point of keeping the ethtool app
> then? Like above, I also don't think those APIs are meant for APPs (or
> are they?). Thus, with the ethtool app removed, we then could again avoid
> introducing a new lib.
Ethtool library is ready to use abstraction on ethdev layer, I don't
insist on having it as a separate library, but I believe it is good to
reuse that code instead of re-writing it.
>
> --yliu
>
prev parent reply other threads:[~2017-07-20 14:55 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-26 16:52 [dpdk-dev] [RFC] Kernel Control Path (KCP) Ferruh Yigit
2017-05-28 16:55 ` Wiles, Keith
2017-05-29 9:26 ` Bruce Richardson
2017-05-29 17:29 ` Wiles, Keith
2017-06-16 15:54 ` Ferruh Yigit
2017-06-20 12:33 ` Ferruh Yigit
2017-05-30 10:55 ` Thomas Monjalon
2017-06-13 17:21 ` Ferruh Yigit
2017-06-13 18:00 ` Jay Rolette
2017-06-13 18:04 ` Dumitrescu, Cristian
2017-06-13 18:18 ` Wiles, Keith
2017-06-15 12:07 ` Alex Rosenbaum
2017-06-16 15:27 ` Ferruh Yigit
2017-06-16 16:48 ` Stephen Hemminger
2017-06-13 18:17 ` Wiles, Keith
2017-06-21 11:06 ` [dpdk-dev] [PATCH v8 0/4] Userspace Network Control Interface (UNCI) Ferruh Yigit
2017-06-21 11:06 ` [dpdk-dev] [PATCH v8 1/4] ethtool: move from sample folder to lib folder Ferruh Yigit
2017-06-26 11:02 ` Bruce Richardson
2017-06-21 11:06 ` [dpdk-dev] [PATCH v8 2/4] unci: add kernel control path kernel module Ferruh Yigit
2017-06-21 15:23 ` Stephen Hemminger
2017-06-30 17:02 ` Ferruh Yigit
2017-06-21 11:06 ` [dpdk-dev] [PATCH v8 3/4] rte_ctrl_if: add control interface library Ferruh Yigit
2017-06-26 11:09 ` Bruce Richardson
2017-06-26 11:30 ` Bruce Richardson
2017-06-21 11:06 ` [dpdk-dev] [PATCH v8 4/4] ethdev: add control interface support Ferruh Yigit
2017-06-21 15:24 ` Stephen Hemminger
2017-06-30 17:06 ` Ferruh Yigit
2017-06-26 11:39 ` [dpdk-dev] [PATCH v8 0/4] Userspace Network Control Interface (UNCI) Bruce Richardson
2017-06-29 16:13 ` Ferruh Yigit
2017-06-30 16:56 ` Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 00/20] " Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 01/20] ethtool: add library skeleton Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 02/20] ethtool: move from sample folder into lib folder Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 03/20] ethtool: remove PMD specific API call Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 04/20] ethtool: update header doxygen syntax Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 05/20] ethtool: enable library Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 06/20] doc: add ethtool library documentation Ferruh Yigit
2017-07-02 20:18 ` Mcnamara, John
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 07/20] doc: update ethtool sample app doc Ferruh Yigit
2017-07-02 20:17 ` Mcnamara, John
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 08/20] unci: add module skeleton Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 09/20] unci: add rtnl newlink Ferruh Yigit
2017-06-30 17:27 ` Stephen Hemminger
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 10/20] unci: init netlink Ferruh Yigit
2017-06-30 17:28 ` Stephen Hemminger
2017-06-30 17:29 ` Stephen Hemminger
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 11/20] unci: add netlink exec Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 12/20] unci: add netdevice ops Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 13/20] unci: add ethtool support Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 14/20] ctrl_if: add library skeleton Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 15/20] ctrl_if: add create destroy interface APIs Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 16/20] ctrl_if: initialize netlink interface Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 17/20] ctrl_if: process control messages Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 18/20] ctrl_if: process ethtool messages Ferruh Yigit
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 19/20] doc: add control interface library documentation Ferruh Yigit
2017-07-02 20:16 ` Mcnamara, John
2017-06-30 16:51 ` [dpdk-dev] [PATCH v9 20/20] ethdev: add control interface support Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 00/20] Userspace Network Control Interface (UNCI) Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 01/20] ethtool: add library skeleton Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 02/20] ethtool: move from sample folder into lib folder Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 03/20] ethtool: remove PMD specific API call Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 04/20] ethtool: update header doxygen syntax Ferruh Yigit
2017-07-06 9:18 ` Burakov, Anatoly
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 05/20] ethtool: enable library Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 06/20] doc: add ethtool library documentation Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 07/20] doc: update ethtool sample app doc Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 08/20] unci: add module skeleton Ferruh Yigit
2017-07-06 9:25 ` Burakov, Anatoly
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 09/20] unci: add rtnl newlink Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 10/20] unci: init netlink Ferruh Yigit
2017-07-06 9:32 ` Burakov, Anatoly
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 11/20] unci: add netlink exec Ferruh Yigit
2017-07-05 19:07 ` Stephen Hemminger
2017-07-06 10:45 ` Ferruh Yigit
2017-07-07 0:25 ` Stephen Hemminger
2017-07-05 19:15 ` Stephen Hemminger
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 12/20] unci: add netdevice ops Ferruh Yigit
2017-07-05 19:12 ` Stephen Hemminger
2017-07-05 19:12 ` Stephen Hemminger
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 13/20] unci: add ethtool support Ferruh Yigit
2017-07-05 19:07 ` Stephen Hemminger
2017-07-05 19:08 ` Stephen Hemminger
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 14/20] ctrl_if: add library skeleton Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 15/20] ctrl_if: add create destroy interface APIs Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 16/20] ctrl_if: initialize generic netlink interface Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 17/20] ctrl_if: process control messages Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 18/20] ctrl_if: process ethtool messages Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 19/20] doc: add control interface library documentation Ferruh Yigit
2017-07-04 16:13 ` [dpdk-dev] [PATCH v10 20/20] ethdev: add control interface support Ferruh Yigit
2017-07-08 6:28 ` Yuanhan Liu
2017-07-20 14:55 ` Ferruh Yigit [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=092bbf4e-f448-7289-1df6-ec7c4cf747f7@intel.com \
--to=ferruh.yigit@intel.com \
--cc=anatoly.burakov@intel.com \
--cc=bruce.richardson@intel.com \
--cc=dev@dpdk.org \
--cc=stephen@networkplumber.org \
--cc=thomas@monjalon.net \
--cc=yliu@fridaylinux.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).