[dpdk-dev] [PATCH v2] example/ip_fragmentation: add fragmentation size support
Ananyev, Konstantin
konstantin.ananyev at intel.com
Fri Jun 30 14:34:43 CEST 2017
> -----Original Message-----
> From: Ashish Jain [mailto:ashish.jain at nxp.com]
> Sent: Friday, June 30, 2017 1:18 PM
> To: Ananyev, Konstantin <konstantin.ananyev at intel.com>; dev at dpdk.org
> Cc: Ashish Jain <ashish.jain at nxp.com>; Hemant Agrawal <hemant.agrawal at nxp.com>
> Subject: [PATCH v2] example/ip_fragmentation: add fragmentation size support
>
> Adding support for determining fragmentation size for both
> ipv4 and ipv6 traffic dynamically through command line.
> It is helpful in testing to configure different fragmentation
> sizes and validate the packets.
>
> Signed-off-by: Ashish Jain <ashish.jain at nxp.com>
> Signed-off-by: Hemant Agrawal <hemant.agrawal at nxp.com>
> ---
> Changes in v2:
> * used strncmp while associating long options with short ones
> * added detailed usage for new added params
>
> examples/ip_fragmentation/main.c | 96 ++++++++++++++++++++++++++++++++++++----
> 1 file changed, 88 insertions(+), 8 deletions(-)
>
> diff --git a/examples/ip_fragmentation/main.c b/examples/ip_fragmentation/main.c
> index 2f45264..c0b36cd 100644
> --- a/examples/ip_fragmentation/main.c
> +++ b/examples/ip_fragmentation/main.c
> @@ -95,6 +95,16 @@
> #define IPV6_DEFAULT_PAYLOAD (IPV6_MTU_DEFAULT - sizeof(struct ipv6_hdr))
>
> /*
> + * Configure fragmentation size for IPv4 and IPv6 packets
> + */
> +static uint32_t frag_size_v4 = IPV4_MTU_DEFAULT;
> +static uint32_t frag_size_v6 = IPV6_MTU_DEFAULT;
> +#define MIN_IPV4_FRAG_SIZE 64
> +#define MAX_IPV4_FRAG_SIZE 9600
> +#define MIN_IPV6_FRAG_SIZE 1280
> +#define MAX_IPV6_FRAG_SIZE 9600
> +
> +/*
> * Max number of fragments per packet expected - defined by config file.
> */
> #define MAX_PACKET_FRAG RTE_LIBRTE_IP_FRAG_MAX_FRAG
> @@ -139,6 +149,9 @@ static struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
>
> #define IPV6_ADDR_LEN 16
>
> +#define CMD_LINE_OPT_IPV4_FRAG_SIZE "frag_size_v4"
> +#define CMD_LINE_OPT_IPV6_FRAG_SIZE "frag_size_v6"
> +
> /* mask of enabled ports */
> static int enabled_port_mask = 0;
>
> @@ -300,14 +313,14 @@ l3fwd_simple_forward(struct rte_mbuf *m, struct lcore_queue_conf *qconf,
> }
>
> /* if we don't need to do any fragmentation */
> - if (likely (IPV4_MTU_DEFAULT >= m->pkt_len)) {
> + if (likely(frag_size_v4 >= m->pkt_len)) {
> qconf->tx_mbufs[port_out].m_table[len] = m;
> len2 = 1;
> } else {
> len2 = rte_ipv4_fragment_packet(m,
> &qconf->tx_mbufs[port_out].m_table[len],
> (uint16_t)(MBUF_TABLE_SIZE - len),
> - IPV4_MTU_DEFAULT,
> + frag_size_v4,
> rxq->direct_pool, rxq->indirect_pool);
>
> /* Free input packet */
> @@ -336,14 +349,14 @@ l3fwd_simple_forward(struct rte_mbuf *m, struct lcore_queue_conf *qconf,
> }
>
> /* if we don't need to do any fragmentation */
> - if (likely (IPV6_MTU_DEFAULT >= m->pkt_len)) {
> + if (likely(frag_size_v6 >= m->pkt_len)) {
> qconf->tx_mbufs[port_out].m_table[len] = m;
> len2 = 1;
> } else {
> len2 = rte_ipv6_fragment_packet(m,
> &qconf->tx_mbufs[port_out].m_table[len],
> (uint16_t)(MBUF_TABLE_SIZE - len),
> - IPV6_MTU_DEFAULT,
> + frag_size_v6,
> rxq->direct_pool, rxq->indirect_pool);
>
> /* Free input packet */
> @@ -489,8 +502,16 @@ print_usage(const char *prgname)
> {
> printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
> " -p PORTMASK: hexadecimal bitmask of ports to configure\n"
> - " -q NQ: number of queue (=ports) per lcore (default is 1)\n",
> - prgname);
> + " -q NQ: number of queue (=ports) per lcore (default is 1)\n"
> + " --frag_size_v4=<num>: optional, IPv4 fragment size in decimal,\n"
> + "\t Condition:(frag_size_v4 - 20) should be a multiple of 8\n"
> + "\t Min value: %d , Max value: %d, default is %d \n"
> + " --frag_size_v6=<num>: optional, IPv6 fragment size in decimal,\n"
> + "\t Condition:(frag_size_v6 - 40) should be a multiple of 8\n"
> + "\t Min value: %d , Max value: %d, default is %d \n",
> + prgname, MIN_IPV4_FRAG_SIZE, MAX_IPV4_FRAG_SIZE,
> + IPV4_MTU_DEFAULT, MIN_IPV6_FRAG_SIZE, MAX_IPV6_FRAG_SIZE,
> + IPV6_MTU_DEFAULT);
> }
>
> static int
> @@ -528,6 +549,29 @@ parse_nqueue(const char *q_arg)
> return n;
> }
>
> +static int
> +parse_frag_size(const char *str, uint32_t min, uint32_t max,
> + uint8_t hdr_size, uint32_t *val)
> +{
> + char *end;
> + uint64_t v;
> +
> + /* parse decimal string */
> + errno = 0;
> + v = strtoul(str, &end, 10);
> + if (errno != 0 || *end != '\0')
> + return -EINVAL;
> +
> + if (v < min || v > max)
> + return -EINVAL;
> +
> + if ((v - hdr_size) % 8)
> + return -EINVAL;
> +
> + *val = (uint32_t)v;
> + return 0;
> +}
> +
> /* Parse the argument given in the command line of the application */
> static int
> parse_args(int argc, char **argv)
> @@ -537,6 +581,8 @@ parse_args(int argc, char **argv)
> int option_index;
> char *prgname = argv[0];
> static struct option lgopts[] = {
> + {"frag_size_v4", 1, 0, 0},
> + {"frag_size_v6", 1, 0, 0},
> {NULL, 0, 0, 0}
> };
>
> @@ -568,8 +614,42 @@ parse_args(int argc, char **argv)
>
> /* long options */
> case 0:
> - print_usage(prgname);
> - return -1;
> + if (!strncmp(lgopts[option_index].name,
> + CMD_LINE_OPT_IPV4_FRAG_SIZE,
> + sizeof(CMD_LINE_OPT_IPV4_FRAG_SIZE))) {
> + ret = parse_frag_size(optarg,
> + MIN_IPV4_FRAG_SIZE,
> + MAX_IPV4_FRAG_SIZE,
> + sizeof(struct ipv4_hdr),
> + &frag_size_v4);
> + if (ret) {
> + printf("invalid value: \"%s\" for "
> + "parameter %s\n",
> + optarg,
> + lgopts[option_index].name);
> + print_usage(prgname);
> + return ret;
> + }
> + }
> + if (!strncmp(lgopts[option_index].name,
> + CMD_LINE_OPT_IPV6_FRAG_SIZE,
> + sizeof(CMD_LINE_OPT_IPV6_FRAG_SIZE))) {
> + ret = parse_frag_size(optarg,
> + MIN_IPV6_FRAG_SIZE,
> + MAX_IPV6_FRAG_SIZE,
> + sizeof(struct ipv6_hdr),
> + &frag_size_v6);
> + if (ret) {
> + printf("invalid value: \"%s\" for "
> + "parameter %s\n",
> + optarg,
> + lgopts[option_index].name);
> + print_usage(prgname);
> + return ret;
> + }
> + }
> +
> + break;
Seems you ignored my comments for v1?
Konstantin
>
> default:
> print_usage(prgname);
> --
> 2.7.4
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