patches for DPDK stable branches
 help / color / mirror / Atom feed
From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: Olivier Matz <olivier.matz@6wind.com>
Cc: Mohsin Kazmi <mohsin.kazmi14@gmail.com>, dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v3] net: fix Intel-specific Prepare the outer ipv4 hdr for checksum
Date: Sat, 31 Jul 2021 15:49:03 +0300
Message-ID: <6d7c41bf-6e9f-8fbd-bfc8-11ca07c777d8@oktetlabs.ru> (raw)
In-Reply-To: <YQPeeY3p8RyBaqEb@platinum>

On 7/30/21 2:11 PM, Olivier Matz wrote:
> On Wed, Jul 28, 2021 at 06:46:53PM +0300, Andrew Rybchenko wrote:
>> On 7/7/21 12:40 PM, Mohsin Kazmi wrote:
>>> Preparation the headers for the hardware offload
>>> misses the outer ipv4 checksum offload.
>>> It results in bad checksum computed by hardware NIC.
>>>
>>> This patch fixes the issue by setting the outer ipv4
>>> checksum field to 0.
>>>
>>> Fixes: 4fb7e803eb1a ("ethdev: add Tx preparation")
>>> Cc: stable@dpdk.org
>>>
>>> Signed-off-by: Mohsin Kazmi <mohsin.kazmi14@gmail.com>
>>> Acked-by: Qi Zhang <qi.z.zhang@intel.com>
>>> ---
>>> v3:
>>>      * Update the conditional test with PKT_TX_OUTER_IP_CKSUM.
>>>      * Update the commit title with "Intel-specific".
>>>
>>> v2:
>>>      * Update the commit message with Fixes.
>>>
>>>    lib/net/rte_net.h | 15 +++++++++++++--
>>>    1 file changed, 13 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/lib/net/rte_net.h b/lib/net/rte_net.h
>>> index 434435ffa2..3f4c8c58b9 100644
>>> --- a/lib/net/rte_net.h
>>> +++ b/lib/net/rte_net.h
>>> @@ -125,11 +125,22 @@ rte_net_intel_cksum_flags_prepare(struct rte_mbuf *m, uint64_t ol_flags)
>>>    	 * Mainly it is required to avoid fragmented headers check if
>>>    	 * no offloads are requested.
>>>    	 */
>>> -	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG)))
>>> +	if (!(ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG |
>>> +			  PKT_TX_OUTER_IP_CKSUM)))
>>>    		return 0;
>>> -	if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6))
>>> +	if (ol_flags & (PKT_TX_OUTER_IPV4 | PKT_TX_OUTER_IPV6)) {
>>>    		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
>>> +		/*
>>> +		 * prepare outer ipv4 header checksum by setting it to 0,
>>> +		 * in order to be computed by hardware NICs.
>>> +		 */
>>> +		if (ol_flags & PKT_TX_OUTER_IP_CKSUM) {
>>> +			ipv4_hdr = rte_pktmbuf_mtod_offset(m,
>>> +					struct rte_ipv4_hdr *, m->outer_l2_len);
>>> +			ipv4_hdr->hdr_checksum = 0;
>>
>> Here we assume that the field is located in the first segment.
>> Unlikely but it still could be false. We must handle it properly.
> 
> This is specified in the API comment, so I think it has to be checked
> by the caller.

If no, what's the point to spoil memory here if stricter check is
done few lines below.

>>> +		}
>>> +	}
>>>    	/*
>>>    	 * Check if headers are fragmented.
>>>
>>


  reply	other threads:[~2021-07-31 12:49 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-30 11:04 [dpdk-stable] [PATCH v2] net: prepare " Mohsin Kazmi
2021-06-30 14:09 ` Olivier Matz
2021-07-07  9:14   ` Mohsin Kazmi
2021-07-22 19:53     ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
2021-08-03 12:29       ` Mohsin Kazmi
2021-07-07  9:40 ` [dpdk-stable] [PATCH v3] net: fix Intel-specific Prepare " Mohsin Kazmi
2021-07-22 19:56   ` Thomas Monjalon
2021-07-27 12:52     ` Olivier Matz
2021-07-28 15:46   ` [dpdk-stable] [dpdk-dev] " Andrew Rybchenko
2021-07-30 11:11     ` Olivier Matz
2021-07-31 12:49       ` Andrew Rybchenko [this message]
2021-08-03 12:49         ` Mohsin Kazmi
2021-08-27 13:44           ` Mohsin Kazmi
2021-09-07 10:49   ` [dpdk-stable] [PATCH v4] net: fix Intel-specific Prepare the outer IPv4 " Mohsin Kazmi
2021-09-15 10:39     ` [dpdk-stable] [dpdk-dev] " Ferruh Yigit
2021-09-15 11:04     ` 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=6d7c41bf-6e9f-8fbd-bfc8-11ca07c777d8@oktetlabs.ru \
    --to=andrew.rybchenko@oktetlabs.ru \
    --cc=dev@dpdk.org \
    --cc=mohsin.kazmi14@gmail.com \
    --cc=olivier.matz@6wind.com \
    --cc=stable@dpdk.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

patches for DPDK stable branches

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ https://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git