linux-kernel - Re: [net-next iproute2 PATCH v3 1/2] iplink: hsr: add support for creating PRP device similar to HSR

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Date:   Tue, 4 Aug 2020 14:59:31 -0400
From:   Murali Karicheri <m-karicheri2@...com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-api@...r.kernel.org>,
        <nsekhar@...com>, <grygorii.strashko@...com>,
        <vinicius.gomes@...el.com>
Subject: Re: [net-next iproute2 PATCH v3 1/2] iplink: hsr: add support for
 creating PRP device similar to HSR

All,

On 7/30/20 9:47 AM, Murali Karicheri wrote:
> Hi Dave,
> 
> On 7/17/20 11:22 AM, Murali Karicheri wrote:
>> This patch enhances the iplink command to add a proto parameters to
>> create PRP device/interface similar to HSR. Both protocols are
>> quite similar and requires a pair of Ethernet interfaces. So re-use
>> the existing HSR iplink command to create PRP device/interface as
>> well. Use proto parameter to differentiate the two protocols.
>>
>> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
>> ---
>>   dependent on the series "[net-next PATCH v3 0/7] Add PRP driver"
>>   include/uapi/linux/if_link.h | 12 +++++++++++-
>>   ip/iplink_hsr.c              | 19 +++++++++++++++++--
>>   2 files changed, 28 insertions(+), 3 deletions(-)
>>
>> diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
>> index a8901a39a345..fa2e3f642deb 100644
>> --- a/include/uapi/linux/if_link.h
>> +++ b/include/uapi/linux/if_link.h
>> @@ -904,7 +904,14 @@ enum {
>>   #define IFLA_IPOIB_MAX (__IFLA_IPOIB_MAX - 1)
>> -/* HSR section */
>> +/* HSR/PRP section, both uses same interface */
>> +
>> +/* Different redundancy protocols for hsr device */
>> +enum {
>> +    HSR_PROTOCOL_HSR,
>> +    HSR_PROTOCOL_PRP,
>> +    HSR_PROTOCOL_MAX,
>> +};
>>   enum {
>>       IFLA_HSR_UNSPEC,
>> @@ -914,6 +921,9 @@ enum {
>>       IFLA_HSR_SUPERVISION_ADDR,    /* Supervision frame multicast 
>> addr */
>>       IFLA_HSR_SEQ_NR,
>>       IFLA_HSR_VERSION,        /* HSR version */
>> +    IFLA_HSR_PROTOCOL,        /* Indicate different protocol than
>> +                     * HSR. For example PRP.
>> +                     */
>>       __IFLA_HSR_MAX,
>>   };
>> diff --git a/ip/iplink_hsr.c b/ip/iplink_hsr.c
>> index 7d9167d4e6a3..6ea138a23cbc 100644
>> --- a/ip/iplink_hsr.c
>> +++ b/ip/iplink_hsr.c
>> @@ -25,7 +25,7 @@ static void print_usage(FILE *f)
>>   {
>>       fprintf(f,
>>           "Usage:\tip link add name NAME type hsr slave1 SLAVE1-IF 
>> slave2 SLAVE2-IF\n"
>> -        "\t[ supervision ADDR-BYTE ] [version VERSION]\n"
>> +        "\t[ supervision ADDR-BYTE ] [version VERSION] [proto 
>> PROTOCOL]\n"
>>           "\n"
>>           "NAME\n"
>>           "    name of new hsr device (e.g. hsr0)\n"
>> @@ -35,7 +35,9 @@ static void print_usage(FILE *f)
>>           "    0-255; the last byte of the multicast address used for 
>> HSR supervision\n"
>>           "    frames (default = 0)\n"
>>           "VERSION\n"
>> -        "    0,1; the protocol version to be used. (default = 0)\n");
>> +        "    0,1; the protocol version to be used. (default = 0)\n"
>> +        "PROTOCOL\n"
>> +        "    0 - HSR, 1 - PRP. (default = 0 - HSR)\n");
>>   }
>>   static void usage(void)
>> @@ -49,6 +51,7 @@ static int hsr_parse_opt(struct link_util *lu, int 
>> argc, char **argv,
>>       int ifindex;
>>       unsigned char multicast_spec;
>>       unsigned char protocol_version;
>> +    unsigned char protocol = HSR_PROTOCOL_HSR;
>>       while (argc > 0) {
>>           if (matches(*argv, "supervision") == 0) {
>> @@ -64,6 +67,13 @@ static int hsr_parse_opt(struct link_util *lu, int 
>> argc, char **argv,
>>                   invarg("version is invalid", *argv);
>>               addattr_l(n, 1024, IFLA_HSR_VERSION,
>>                     &protocol_version, 1);
>> +        } else if (matches(*argv, "proto") == 0) {
>> +            NEXT_ARG();
>> +            if (!(get_u8(&protocol, *argv, 0) == HSR_PROTOCOL_HSR ||
>> +                  get_u8(&protocol, *argv, 0) == HSR_PROTOCOL_PRP))
>> +                invarg("protocol is invalid", *argv);
>> +            addattr_l(n, 1024, IFLA_HSR_PROTOCOL,
>> +                  &protocol, 1);
>>           } else if (matches(*argv, "slave1") == 0) {
>>               NEXT_ARG();
>>               ifindex = ll_name_to_index(*argv);
>> @@ -140,6 +150,11 @@ static void hsr_print_opt(struct link_util *lu, 
>> FILE *f, struct rtattr *tb[])
>>                        RTA_PAYLOAD(tb[IFLA_HSR_SUPERVISION_ADDR]),
>>                        ARPHRD_VOID,
>>                        b1, sizeof(b1)));
>> +    if (tb[IFLA_HSR_PROTOCOL])
>> +        print_int(PRINT_ANY,
>> +              "proto",
>> +              "proto %d ",
>> +              rta_getattr_u8(tb[IFLA_HSR_PROTOCOL]));
>>   }
>>   static void hsr_print_help(struct link_util *lu, int argc, char **argv,
>>
> Just wondering who will merge this now that PRP support series below
> is applied to net-next. These iproute2 patches have to go along with 
> that to have full PRP support working.
> 
> https://lkml.org/lkml/2020/7/22/638
> 
Who can apply these patches for iproute2?
-- 
Murali Karicheri
Texas Instruments