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From: Jerin Jacob <jerinjacobk@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Andrzej Ostruszka <aostruszka@marvell.com>, dpdk-dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 0/4] Introduce IF proxy library
Date: Thu, 16 Apr 2020 22:19:05 +0530
Message-ID: <CALBAE1NKKbpE=SAFkCRuAxKrGa877pAVz3SfSpUD-ce5e=bD5w@mail.gmail.com> (raw)
In-Reply-To: <20200416091118.7a4a0bab@hermes.lan>

On Thu, Apr 16, 2020 at 9:41 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> On Fri, 6 Mar 2020 17:41:00 +0100
> Andrzej Ostruszka <aostruszka@marvell.com> wrote:
>
> > What is this useful for
> > =======================
> >
> > Usually, when an ethernet port is assigned to DPDK it vanishes from the
> > system and user looses ability to control it via normal configuration
> > utilities (e.g. those from iproute2 package).  Moreover by default DPDK
> > application is not aware of the network configuration of the system.
> >
> > To address both of these issues application needs to:
> > - add some command line interface (or other mechanism) allowing for
> >   control of the port and its configuration
> > - query the status of network configuration and monitor its changes
> >
> > The purpose of this library is to help with both of these tasks (as long
> > as they remain in domain of configuration available to the system).  In
> > other words, if DPDK application has some special needs, that cannot be
> > addressed by the normal system configuration utilities, then they need
> > to be solved by the application itself.
> >
> > The connection between DPDK and system is based on the existence of
> > ports that are visible to both DPDK and system (like Tap, KNI and
> > possibly some other drivers).  These ports serve as an interface
> > proxies.
> >
> > Let's visualize the action of the library by the following example:
> >
> >               Linux             |            DPDK
> > ==============================================================
> >                                 |
> >                                 |   +-------+       +-------+
> >                                 |   | Port1 |       | Port2 |
> > "ip link set dev tap1 mtu 1600" |   +-------+       +-------+
> >                           |     |       ^              ^ ^
> >                           |  +------+   | mtu_change   | |
> >                           `->| Tap1 |---' callback     | |
> >                              +------+                  | |
> > "ip addr add 198.51.100.14 \    |                      | |
> >                   dev tap2"     |                      | |
> >                           |  +------+                  | |
> >                           +->| Tap2 |------------------' |
> >                           |  +------+  addr_add callback |
> > "ip route add 198.0.2.0/24 \    |  |                     |
> >                   dev tap2"     |  | route_add callback  |
> >                                 |  `---------------------'
>
> Has anyone investigated solving this in the kernel rather than
> creating the added overhead of more Linux devices?
>
> What I am thinking of is a netlink to userspace interface.
> The kernel already has File-System-in-Userspace (FUSE) to allow
> for filesystems. What about having a NUSE (Netlink in userspace)?

IMO, there is no issue with the Linux Netlink _userspace_ interface.
The goal of IF proxy to abstract the OS differences so that it can
work with Linux, FreeBSD, and Windows(if needed).


>
> Then DPDK could have a daemon that is a provider to NUSE.
> This solution would also benefit other non-DPDK projects like VPP
> and allow DPDK to integrate with devlink etc.

  reply	other threads:[~2020-04-16 16:49 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-06 16:41 Andrzej Ostruszka
2020-03-06 16:41 ` [dpdk-dev] [PATCH 1/4] lib: introduce IF Proxy library Andrzej Ostruszka
2020-03-31 12:36   ` Harman Kalra
2020-03-31 15:37     ` Andrzej Ostruszka [C]
2020-04-01  5:29   ` Varghese, Vipin
2020-04-01 20:08     ` Andrzej Ostruszka [C]
2020-04-08  3:04       ` Varghese, Vipin
2020-04-08 18:13         ` Andrzej Ostruszka [C]
2020-03-06 16:41 ` [dpdk-dev] [PATCH 2/4] if_proxy: add library documentation Andrzej Ostruszka
2020-03-06 16:41 ` [dpdk-dev] [PATCH 3/4] if_proxy: add simple functionality test Andrzej Ostruszka
2020-03-06 16:41 ` [dpdk-dev] [PATCH 4/4] if_proxy: add example application Andrzej Ostruszka
2020-03-06 17:17 ` [dpdk-dev] [PATCH 0/4] Introduce IF proxy library Andrzej Ostruszka
2020-03-10 11:10 ` [dpdk-dev] [PATCH v2 " Andrzej Ostruszka
2020-03-10 11:10   ` [dpdk-dev] [PATCH v2 1/4] lib: introduce IF Proxy library Andrzej Ostruszka
2020-07-02  0:34     ` Stephen Hemminger
2020-07-07 20:13       ` Andrzej Ostruszka [C]
2020-07-08 16:07         ` Morten Brørup
2020-07-09  8:43           ` Andrzej Ostruszka [C]
2020-07-22  0:40             ` Thomas Monjalon
2020-07-22  8:45               ` Jerin Jacob
2020-07-22  8:56                 ` Thomas Monjalon
2020-07-22  9:09                   ` Jerin Jacob
2020-07-22  9:27                     ` Thomas Monjalon
2020-07-22  9:54                       ` Jerin Jacob
2020-07-23 14:09                         ` [dpdk-dev] [EXT] " Andrzej Ostruszka [C]
2020-03-10 11:10   ` [dpdk-dev] [PATCH v2 2/4] if_proxy: add library documentation Andrzej Ostruszka
2020-03-10 11:10   ` [dpdk-dev] [PATCH v2 3/4] if_proxy: add simple functionality test Andrzej Ostruszka
2020-03-10 11:10   ` [dpdk-dev] [PATCH v2 4/4] if_proxy: add example application Andrzej Ostruszka
2020-03-25  8:08   ` [dpdk-dev] [PATCH v2 0/4] Introduce IF proxy library David Marchand
2020-03-25 11:11     ` Morten Brørup
2020-03-26 17:42       ` Andrzej Ostruszka
2020-04-02 13:48         ` Andrzej Ostruszka [C]
2020-04-03 17:19           ` Thomas Monjalon
2020-04-03 19:09             ` Jerin Jacob
2020-04-03 21:18               ` Morten Brørup
2020-04-03 21:57                 ` Thomas Monjalon
2020-04-04 10:18                   ` Jerin Jacob
2020-04-10 10:41                     ` Morten Brørup
2020-04-04 18:30             ` Andrzej Ostruszka [C]
2020-04-04 19:58               ` Thomas Monjalon
2020-04-10 10:03                 ` Morten Brørup
2020-04-10 12:28                   ` Jerin Jacob
2020-03-26 12:41     ` Andrzej Ostruszka
2020-03-30 19:23       ` Andrzej Ostruszka
2020-04-03 21:42   ` Thomas Monjalon
2020-04-04 18:07     ` Andrzej Ostruszka [C]
2020-04-04 19:51       ` Thomas Monjalon
2020-04-16 16:11 ` [dpdk-dev] [PATCH " Stephen Hemminger
2020-04-16 16:49   ` Jerin Jacob [this message]
2020-04-16 17:04     ` Stephen Hemminger
2020-04-16 17:26       ` Andrzej Ostruszka [C]
2020-04-16 17:27       ` Jerin Jacob
2020-04-16 17:12     ` Andrzej Ostruszka [C]
2020-04-16 17:19       ` Stephen Hemminger
2020-05-04  8:53 ` [dpdk-dev] [PATCH v3 " Andrzej Ostruszka
2020-05-04  8:53   ` [dpdk-dev] [PATCH v3 1/4] lib: introduce IF Proxy library Andrzej Ostruszka
2020-05-04  8:53   ` [dpdk-dev] [PATCH v3 2/4] if_proxy: add library documentation Andrzej Ostruszka
2020-05-04  8:53   ` [dpdk-dev] [PATCH v3 3/4] if_proxy: add simple functionality test Andrzej Ostruszka
2020-05-04  8:53   ` [dpdk-dev] [PATCH v3 4/4] if_proxy: add example application Andrzej Ostruszka
2020-06-22  9:21 ` [dpdk-dev] [PATCH v4 0/4] Introduce IF proxy library Andrzej Ostruszka
2020-06-22  9:21   ` [dpdk-dev] [PATCH v4 1/4] lib: introduce IF Proxy library Andrzej Ostruszka
2020-06-22  9:21   ` [dpdk-dev] [PATCH v4 2/4] if_proxy: add library documentation Andrzej Ostruszka
2020-06-22  9:21   ` [dpdk-dev] [PATCH v4 3/4] if_proxy: add simple functionality test Andrzej Ostruszka
2020-06-22  9:21   ` [dpdk-dev] [PATCH v4 4/4] if_proxy: add example application Andrzej Ostruszka

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