DPDK patches and discussions
 help / color / mirror / Atom feed
From: Konstantin Ananyev <konstantin.ananyev@huawei.com>
To: Gagandeep Singh <g.singh@nxp.com>, "dev@dpdk.org" <dev@dpdk.org>,
	Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>,
	Sean Morrissey <sean.morrissey@intel.com>
Cc: "stable@dpdk.org" <stable@dpdk.org>
Subject: RE: [PATCH 3/3] examples/l3fwd: fix maximum acceptable port ID in routes
Date: Wed, 17 Jul 2024 10:17:36 +0000	[thread overview]
Message-ID: <370cf325ad02427cbca5a37756da4c35@huawei.com> (raw)
In-Reply-To: <20240715101458.645014-3-g.singh@nxp.com>



> Application is accepting routes for port ID up to UINT8_MAX
> for LPM amd EM routes on parsing the given rule file, but only
> up to 32 ports can be enabled as per the variable enabled_port_mask
> which is defined as uint32_t.
> 
> This patch restricts the rules parsing code to accept routes for
> port ID up to 31 only to avoid any unnecessary maintenance of rules
> which will never be used.

If we want to add this extra check, probably better to do it in setup_lpm().
Where we already check that port is enabled, and If not, then this route rule will be skipped:

        /* populate the LPM table */
        for (i = 0; i < route_num_v4; i++) {
                struct in_addr in;

                /* skip unused ports */
                if ((1 << route_base_v4[i].if_out &
                                enabled_port_mask) == 0)
                        continue;

Same for EM.
Another question here - why we just silently skip the rule with invalid port?
Probably need to fail with error... that what ACL code-path does.

> Fixes: e7e6dd643092 ("examples/l3fwd: support config file for EM")
> Fixes: 52def963fc1c ("examples/l3fwd: support config file for LPM/FIB")
> Cc: sean.morrissey@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
> ---
>  examples/l3fwd/em_route_parse.c  | 6 ++++--
>  examples/l3fwd/lpm_route_parse.c | 6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/examples/l3fwd/em_route_parse.c b/examples/l3fwd/em_route_parse.c
> index 8b534de5f1..65c71cd1ba 100644
> --- a/examples/l3fwd/em_route_parse.c
> +++ b/examples/l3fwd/em_route_parse.c
> @@ -65,7 +65,8 @@ em_parse_v6_rule(char *str, struct em_rule *v)
>  	/* protocol. */
>  	GET_CB_FIELD(in[CB_FLD_PROTO], v->v6_key.proto, 0, UINT8_MAX, 0);
>  	/* out interface. */
> -	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
> +	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
> +			(sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
> 
>  	return 0;
>  }
> @@ -102,7 +103,8 @@ em_parse_v4_rule(char *str, struct em_rule *v)
>  	/* protocol. */
>  	GET_CB_FIELD(in[CB_FLD_PROTO], v->v4_key.proto, 0, UINT8_MAX, 0);
>  	/* out interface. */
> -	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
> +	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
> +			(sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
> 
>  	return 0;
>  }
> diff --git a/examples/l3fwd/lpm_route_parse.c b/examples/l3fwd/lpm_route_parse.c
> index f27b66e838..357c12d9fe 100644
> --- a/examples/l3fwd/lpm_route_parse.c
> +++ b/examples/l3fwd/lpm_route_parse.c
> @@ -110,7 +110,8 @@ lpm_parse_v6_rule(char *str, struct lpm_route_rule *v)
> 
>  	rc = lpm_parse_v6_net(in[CB_FLD_DST_ADDR], v->ip_32, &v->depth);
> 
> -	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
> +	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
> +			(sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
> 
>  	return rc;
>  }
> @@ -132,7 +133,8 @@ lpm_parse_v4_rule(char *str, struct lpm_route_rule *v)
> 
>  	rc = parse_ipv4_addr_mask(in[CB_FLD_DST_ADDR], &v->ip, &v->depth);
> 
> -	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
> +	GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
> +			(sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
> 
>  	return rc;
>  }
> --
> 2.25.1


  reply	other threads:[~2024-07-17 10:17 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-15 10:14 [PATCH 1/3] examples/l3fwd: support single route file Gagandeep Singh
2024-07-15 10:14 ` [PATCH 2/3] examples/l3fwd: fix return value on rules add Gagandeep Singh
2024-07-16  6:55   ` Hemant Agrawal
2024-07-15 10:14 ` [PATCH 3/3] examples/l3fwd: fix maximum acceptable port ID in routes Gagandeep Singh
2024-07-17 10:17   ` Konstantin Ananyev [this message]
2024-07-18  6:30     ` Gagandeep Singh
2024-07-18 10:01       ` Konstantin Ananyev
2024-07-22  3:28         ` Gagandeep Singh
2024-07-22  4:27           ` Gagandeep Singh
2024-07-23 16:22             ` Konstantin Ananyev
2024-07-24  8:02               ` Konstantin Ananyev
2024-08-02 10:13                 ` Gagandeep Singh
2024-08-06  3:41 ` [v2 0/3] L3fwd changes Gagandeep Singh
2024-08-06  3:41   ` [v2 1/3] examples/l3fwd: support single route file Gagandeep Singh
2024-08-06  3:41   ` [v2 2/3] examples/l3fwd: fix return value on rules add Gagandeep Singh
2024-08-06  3:41   ` [v2 3/3] examples/l3fwd: enhance valid ports checking Gagandeep Singh
2024-11-13 19:39     ` Stephen Hemminger
2024-11-19 17:13       ` Thomas Monjalon
2024-11-20  4:07         ` Gagandeep Singh
2024-11-20  4:05   ` [v3 0/3] L3fwd changes Gagandeep Singh
2024-11-20  4:05     ` [v3 1/3] examples/l3fwd: support single route file Gagandeep Singh
2024-11-20  4:05     ` [v3 2/3] examples/l3fwd: fix return value on rules add Gagandeep Singh
2024-11-20  4:05     ` [v3 3/3] examples/l3fwd: enhance valid ports checking Gagandeep Singh
2024-11-20 11:10       ` Konstantin Ananyev

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=370cf325ad02427cbca5a37756da4c35@huawei.com \
    --to=konstantin.ananyev@huawei.com \
    --cc=dev@dpdk.org \
    --cc=g.singh@nxp.com \
    --cc=konstantin.v.ananyev@yandex.ru \
    --cc=sean.morrissey@intel.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
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).