From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Ian Stokes <ian.stokes@intel.com>, dev@dpdk.org
Cc: stephen@networkplumber.org
Subject: Re: [dpdk-dev] [PATCH v1 1/6] ethdev: add min/max MTU to device info
Date: Tue, 19 Mar 2019 16:15:42 +0000 [thread overview]
Message-ID: <b8707c85-1c20-6ba3-ca87-c778869fbfc4@intel.com> (raw)
Message-ID: <20190319161542.EXvMhDCSRNLdKqJzFroDLvLFbiKEOZA3bhgPl3G0SP8@z> (raw)
In-Reply-To: <1551303948-19746-2-git-send-email-ian.stokes@intel.com>
On 2/27/2019 9:45 PM, Ian Stokes wrote:
> From: Stephen Hemminger <stephen@networkplumber.org>
>
> This addresses the usability issue raised by OVS at DPDK Userspace
> summit. It adds general min/max mtu into device info. For compatiablity,
> and to save space, it fits in a hole in existing structure.
>
> The initial version sets max mtu to normal Ethernet, it is up to
> PMD to set larger value if it supports Jumbo frames.
>
> Also remove the deprecation notice introduced in 18.11 regarding this
> change and bump ethdev ABI version.
>
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> Signed-off-by: Ian Stokes <ian.stokes@intel.com>
> Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
> @@ -2524,6 +2524,8 @@ rte_eth_dev_info_get(uint16_t port_id, struct rte_eth_dev_info *dev_info)
> dev_info->rx_desc_lim = lim;
> dev_info->tx_desc_lim = lim;
> dev_info->device = dev->device;
> + dev_info->min_mtu = ETHER_MIN_MTU;
> + dev_info->max_mtu = UINT16_MAX;
Not only mtu but do you think should we document in 'rte_eth_dev_info_get()'
doxygen documentation, the default values that API sets?
>
> RTE_FUNC_PTR_OR_RET(*dev->dev_ops->dev_infos_get);
> (*dev->dev_ops->dev_infos_get)(dev, dev_info);
> @@ -2587,12 +2589,17 @@ int
> rte_eth_dev_set_mtu(uint16_t port_id, uint16_t mtu)
> {
> int ret;
> + struct rte_eth_dev_info dev_info;
> struct rte_eth_dev *dev;
>
> RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
> dev = &rte_eth_devices[port_id];
> RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->mtu_set, -ENOTSUP);
>
> + rte_eth_dev_info_get(port_id, &dev_info);
If we rely on 'rte_eth_dev_info_get()', we should add a check if "dev_infos_get"
is supported before calling it, like [1]. Unfortunately 'rte_eth_dev_info_get()'
return type is 'void', so we can't know if the struct has valid values or not
otherwise.
Or perhaps if port doesn't support "dev_infos_get", we can skip the mtu check
instead of returning error.
[1]
RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
> + if (mtu < dev_info.min_mtu || mtu > dev_info.max_mtu)
> + return -EINVAL;
> +
Should we document this behavior change in the function comment in header file?
Update when -EINVAL returned, etc..
next prev parent reply other threads:[~2019-03-19 16:15 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-27 21:45 [dpdk-dev] [PATCH v1 0/6] " Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 1/6] " Ian Stokes
2019-03-19 16:15 ` Ferruh Yigit [this message]
2019-03-19 16:15 ` Ferruh Yigit
2019-03-21 12:50 ` Ian Stokes
2019-03-21 12:50 ` Ian Stokes
2019-03-21 14:06 ` Ferruh Yigit
2019-03-21 14:06 ` Ferruh Yigit
2019-03-21 14:59 ` Ian Stokes
2019-03-21 14:59 ` Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 2/6] net/i40e: set min and max MTU for i40e devices Ian Stokes
2019-03-19 16:18 ` Ferruh Yigit
2019-03-19 16:18 ` Ferruh Yigit
2019-03-21 12:57 ` Ian Stokes
2019-03-21 12:57 ` Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 3/6] net/i40e: set min and max MTU for i40e VF devices Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 4/6] net/ixgbe: set min and max MTU for ixgbe devices Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 5/6] net/ixgbe: set min and max MTU for ixgbe VF devices Ian Stokes
2019-02-27 21:45 ` [dpdk-dev] [PATCH v1 6/6] net/e1000: set min and max MTU for igb devices Ian Stokes
2019-03-19 16:30 ` [dpdk-dev] [PATCH v1 0/6] ethdev: add min/max MTU to device info Ferruh Yigit
2019-03-19 16:30 ` Ferruh Yigit
2019-03-21 13:03 ` Ian Stokes
2019-03-21 13:03 ` Ian Stokes
2019-03-22 13:05 ` Ian Stokes
2019-03-22 13:05 ` Ian Stokes
2019-03-22 14:08 ` Ferruh Yigit
2019-03-22 14:08 ` Ferruh Yigit
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=b8707c85-1c20-6ba3-ca87-c778869fbfc4@intel.com \
--to=ferruh.yigit@intel.com \
--cc=dev@dpdk.org \
--cc=ian.stokes@intel.com \
--cc=stephen@networkplumber.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).