From: Stephen Hemminger <stephen@networkplumber.org>
To: Dan Gora <dg@adax.com>
Cc: Igor Ryzhov <iryzhov@nfware.com>,
Ferruh Yigit <ferruh.yigit@intel.com>,
dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2 10/10] kni: add API to set link status on kernel interface
Date: Tue, 11 Sep 2018 14:52:48 -0700 [thread overview]
Message-ID: <20180911145248.7512abd1@xeon-e3> (raw)
In-Reply-To: <CAGyogRZ5pr2-F71ToBgLLDsnbZEMJWZrVDcU1QCOsfadipuT_g@mail.gmail.com>
On Tue, 11 Sep 2018 18:45:49 -0300
Dan Gora <dg@adax.com> wrote:
> Hi All,
>
> So I implemented the "write to /sys/devices/virtual/net/*/carrier"
> method to change the link status, but there is one more minor thing
> that I wanted to point out about this approach. The problem is that
> you cannot read or write the '/sys/devices/virtual/net/*/carrier' file
> while the interface is marked 'down'. This means that link status
> changes can only be performed by the DPDK application while the
> interface is in the "up" state. With the ioctl method, you can change
> the carrier state at pretty much any time.
>
> Is this a problem? It's not a huge one, I guess, but it is something
> else to consider.
>
> Please let me know what you all think.
>
> thanks
> dan
The carrier state has no meaning when device is down, at least for physical
devices. Because often the PHY is powered off when the device is marked down.
next prev parent reply other threads:[~2018-09-11 21:52 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-28 22:45 [dpdk-dev] [PATCH 00/10] kni: Interface detach and link status fixes Dan Gora
2018-06-29 1:54 ` Dan Gora
2018-06-29 1:54 ` [dpdk-dev] [PATCH v2 01/10] kni: remove unused variables from struct kni_dev Dan Gora
2018-08-29 10:29 ` Ferruh Yigit
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 02/10] kni: separate releasing netdev from freeing KNI interface Dan Gora
2018-08-29 10:59 ` Ferruh Yigit
2018-09-04 0:20 ` Dan Gora
2018-09-04 0:36 ` Dan Gora
2018-10-10 17:24 ` Ferruh Yigit
2018-10-10 18:18 ` Dan Gora
2018-10-10 22:51 ` Ferruh Yigit
2018-10-10 23:38 ` Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 03/10] kni: don't touch struct kni_dev after freeing Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 04/10] kni: add rte_kni_free to KNI library Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 05/10] kni: don't run rte_kni_handle_request after interface release Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 06/10] kni: increase length of timeout for KNI responses Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 07/10] kni: update kni test for rte_kni_free Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 08/10] kni: add rte_kni_free to KNI example app Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 09/10] kni: add rte_kni_free to KNI vdev driver Dan Gora
2018-06-29 1:55 ` [dpdk-dev] [PATCH v2 10/10] kni: add API to set link status on kernel interface Dan Gora
2018-08-29 11:48 ` Ferruh Yigit
2018-08-29 21:10 ` Dan Gora
2018-08-29 22:01 ` Stephen Hemminger
2018-08-29 15:54 ` Stephen Hemminger
2018-08-29 21:02 ` Dan Gora
2018-08-29 22:00 ` Stephen Hemminger
2018-08-29 22:12 ` Dan Gora
2018-08-29 22:41 ` Dan Gora
2018-08-29 23:10 ` Stephen Hemminger
2018-08-30 9:49 ` Igor Ryzhov
2018-08-30 10:32 ` Igor Ryzhov
2018-08-30 21:41 ` Dan Gora
2018-08-30 22:09 ` Stephen Hemminger
2018-08-30 22:11 ` Dan Gora
2018-09-04 0:47 ` Dan Gora
2018-09-05 12:57 ` Stephen Hemminger
2018-09-11 21:45 ` Dan Gora
2018-09-11 21:52 ` Stephen Hemminger [this message]
2018-09-11 22:07 ` Dan Gora
2018-09-11 23:14 ` Stephen Hemminger
2018-09-12 4:02 ` Jason Wang
2018-09-11 23:14 ` [dpdk-dev] [PATCH 0/2] " Dan Gora
2018-09-11 23:14 ` [dpdk-dev] [PATCH 1/2] " Dan Gora
2018-09-11 23:18 ` Dan Gora
2018-07-20 11:36 ` [dpdk-dev] [PATCH 00/10] kni: Interface detach and link status fixes Ferruh Yigit
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