[dpdk-users] DPDK: IP reassemble segmentation fault for rte_ip_frag_table_create.

[Nirmal R <raja.nirmalraj@gmail.com>]

Hello,



I am new to DPDK and writing the code in c++ language, currently working on
IP reassembling the packets below is my sample code which is giving me
segmentation fault for rte_ip_frag_table_create, I am unable to debug the
issue. Much appreciated if someone can explain to me where did I go wrong
and how to do it in a proper manner. At the moment I am finding it
difficult. Thanks in advance.



#define BUFFER_RING_SIZE 65536

#define BUFFER_LENGTH 1500

#define POOL_SIZE 8192

#define POOL_CACHE_SIZE 256



#define DEF_FLOW_NUM    0x1000

#define DEF_FLOW_TTL    MS_PER_S

#define IP_FRAG_TBL_BUCKET_ENTRIES  4

static uint32_t max_flow_num = DEF_FLOW_NUM;

static uint32_t max_flow_ttl = DEF_FLOW_TTL;

#define RTE_LOGTYPE_IP_RSMBL RTE_LOGTYPE_USER1



struct lcore_queue_conf {

            struct rte_ip_frag_tbl *frag_tbl;

            struct rte_ip_frag_death_row death_row;

} __rte_cache_aligned;





static inline int setup_queue_tbl(struct lcore_queue_conf *qconf)

{

    uint64_t frag_cycles = (rte_get_tsc_hz() + MS_PER_S - 1) / MS_PER_S *
max_flow_ttl;

    qconf->frag_tbl = rte_ip_frag_table_create(max_flow_num,
IP_FRAG_TBL_BUCKET_ENTRIES, max_flow_num, frag_cycles, rte_socket_id());

    if((qconf->frag_tbl) == NULL){

                        RTE_LOG(ERR, IP_RSMBL, "Table Failed.");

                        return -1;

     }

    return 0;

}



static int

lcore_main()

{

            struct lcore_queue_conf *qconf;



            if(setup_queue_tbl(qconf) != 0)

            rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));



.

.

.

.



}



int main(int argc, char *argv[])

{



            struct rte_mempool *mbuf_pool;

            struct rte_ring *ring;

            uint16_t portcheck;



            /* catch ctrl-c so we can print on exit */

            signal(SIGINT, int_handler);



            /* EAL setup */

            ret=rte_eal_init(argc, argv);

            cout << "====================================================="
<< endl;

            if(ret < 0)

                        cout << EAL initialising failed." <<
strerror(-ret) << endl;

            else

                        cout << EAL initialisation success." << endl;



            /* Mempool creation */



            mbuf_pool=rte_pktmbuf_pool_create("BUFFER", POOL_SIZE,
POOL_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());



            if(mbuf_pool== NULL)

            rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));

.

.

.

.

            /* Master core call */

            lcore_main();



            return 0;

}





EAL: Detected 12 lcore(s)

EAL: Detected 1 NUMA nodes

EAL: Multi-process socket /var/run/dpdk/rte/mp_socket

EAL: Selected IOVA mode 'VA'

EAL: Probing VFIO support...

EAL: VFIO support initialized

EAL:   Invalid NUMA socket, default to 0

EAL:   Invalid NUMA socket, default to 0

EAL:   using IOMMU type 1 (Type 1)

EAL: Probe PCI driver: net_ixgbe (8086:15d1) device: 0000:01:00.0 (socket 0)

EAL:   Invalid NUMA socket, default to 0

EAL: No legacy callbacks, legacy socket not created

=====================================================

EAL initialisation success.

PORT 0: Ethernet configuration success.

TX queue configuration success.

RX queue configuration success.

PORT 0: NIC started successfully.

PORT 0: Enabled promiscuous mode.

MAC Addr b4:96:91:3f:21:b6

=====================================================

USER1: rte_ip_frag_table_create: allocated of 6291584 bytes at socket 0

Segmentation fault



With Regards,

Nirmal.