From: "那娜(恒月)" <nana.nn@alibaba-inc.com>
To: "Bruce Richardson" <bruce.richardson@intel.com>
Cc: dev <dev@dpdk.org>
Subject: [dpdk-dev] 答复： [PATCH] lib/lpm:fix two issues in the delete_depth_small()
Date: Thu, 29 Oct 2015 19:08:27 +0800 [thread overview]
Message-ID: <5bc6a2f1-5448-480f-9b8b-13ff0bc94fca.nana.nn@alibaba-inc.com> (raw)
In-Reply-To: 20151029101854.GC6160@bricha3-MOBL3
HI Bruce: How about this, I send you the test program , then you can demonstrate the bugs . If you demonstrate the bugs ,then you can get the lpm bug's fix into the release first. Further ,we explicitly discuss the details about the unit test and make it a patch of dpdk. Thank you very much!
Regards
Na Na
------------------------------------------------------------------发件人：Bruce Richardson <bruce.richardson@intel.com>发送时间：2015年10月29日(星期四) 18:18收件人：那娜(恒月) <nana.nn@alibaba-inc.com>抄 送：Jijiang Liu <jijiang.liu@intel.com>，dev <dev@dpdk.org>主 题：Re: [dpdk-dev] [PATCH] lib/lpm:fix two issues in the delete_depth_small()
On Thu, Oct 29, 2015 at 10:41:45AM +0800, nana.nn wrote:
> Hi Bruce:
> Should I send the test unit as a DPDK patch, or just the program for you to demonstrate the bugs?
>
>
> Thank you very much!
>
>
> Regards
>
> Na Na
>
A patch to add a unit test for the bug would be best.
/Bruce
>
>
>
> On Oct 28, 2015, at 10:40 PM, Bruce Richardson <bruce.richardson@intel.com> wrote:
>
> > On Wed, Oct 28, 2015 at 11:44:15AM +0800, Jijiang Liu wrote:
> >> Fix two issues in the delete_depth_small() function.
> >>
> >> 1> The control is not strict in this function.
> >>
> >> In the following structure,
> >> struct rte_lpm_tbl24_entry {
> >> union {
> >> uint8_t next_hop;
> >> uint8_t tbl8_gindex;
> >> };
> >> uint8_t ext_entry :1;
> >> }
> >>
> >> When ext_entry = 0, use next_hop.only to process rte_lpm_tbl24_entry.
> >>
> >> When ext_entry = 1, use tbl8_gindex to process the rte_lpm_tbl8_entry.
> >>
> >> When using LPM24 + 8 algorithm, it will use ext_entry to decide to process rte_lpm_tbl24_entry structure or rte_lpm_tbl8_entry structure.
> >> If a route is deleted, the prefix of previous route is used to override the deleted route. when (lpm->tbl24[i].ext_entry == 0 && lpm->tbl24[i].depth > depth)
> >> it should be ignored, but due to the incorrect logic, the next_hop is used as tbl8_gindex and will process the rte_lpm_tbl8_entry.
> >>
> >> 2> Initialization of rte_lpm_tbl8_entry is incorrect in this function
> >>
> >> In this function, use new rte_lpm_tbl8_entry we call A to replace the old rte_lpm_tbl8_entry. But the valid_group do not set VALID, so it will be INVALID.
> >> Then when adding a new route which depth is > 24,the tbl8_alloc() function will search the rte_lpm_tbl8_entrys to find INVALID valid_group,
> >> and it will return the A to the add_depth_big function, so A's data is overridden.
> >>
> >> Signed-off-by: NaNa <nana.nn@alibaba-inc.com>
> >>
> >
> > Hi NaNa, Jijiang,
> >
> > since this patch contains two separate fixes, it would be better split into
> > two separate patches, one for each fix. Also, please add a "Fixes" line to
> > the commit log.
> >
> > Are there still plans for a unit test to demonstrate the bug(s) and make it easy
> > for us to verify the fix?
> >
> > Regards,
> > /Bruce
>
prev parent reply other threads:[~2015-10-29 11:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-28 3:44 [dpdk-dev] " Jijiang Liu
[not found] ` <BE55DC9B-FD48-47E7-A9AA-56278CB0D1F6@alibaba-inc.com>
2015-10-28 4:03 ` [dpdk-dev] 答复: " 洪余柯(洪余柯)
2015-10-28 14:40 ` [dpdk-dev] " Bruce Richardson
2015-10-28 16:55 ` Nikita Kozlov
2015-10-28 17:10 ` Bruce Richardson
[not found] ` <1E3F319B-C4DF-45E9-9FC4-4D93B176CC9C@alibaba-inc.com>
2015-10-29 10:18 ` Bruce Richardson
2015-10-29 11:08 ` 那娜(恒月) [this message]
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