Hi Subrata,
What exactly fails in segment_manager_add_segment? Memory for builtin app
segments is not allocated in /dev/shm instead it’s mmaped. Does clib_mem_vm_map
fail?
Regards,
Florin
> On Dec 12, 2021, at 7:52 AM, Subrata Nath <subratanat...@gmail.com> wrote:
>
> HI,
>
> I am trying to create a UDP transport socket using VPP host stack.
> vnet_listen() fails. Error seems to coming from the following code which
> tries to add segment in vnet/session/segment_manager.c -
> segment_manager_alloc_session_fifos()
>
> if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0)
> {
> return SESSION_E_SEG_CREATE;
> }
>
> Following is my code snippet. VPP version v21.10-rc0~353-ge3cf4d0cf. Some of
> relevant parameters are mentioned along with lines e.g. fifo size , segment
> size. Other parameters like sw_infex, fib_index & ip all are fine.
>
> 1. Create the ns => This step is successful.
>
> u8 *appns_id = format (0, "myappns");
> vnet_app_namespace_add_del_args_t ns_args = {
> .ns_id = appns_id,
> .sw_if_index = sw_if_index,
> .ip4_fib_id = fib_id,
> .is_add = 1
> };
>
> vnet_app_namespace_add_del (&ns_args); ==> Successful.
>
> 2. vnet_application_attach => This step is successful
> myapp_server_main_t *myappsm = &myapp_server_main;
> u64 options[APP_OPTIONS_N_OPTIONS];
> vnet_app_attach_args_t _a, *a = &_a;
>
> vnet_session_enable_disable (myappsm->vlib_main, 1);
>
> clib_memset (a, 0, sizeof (*a));
> clib_memset (options, 0, sizeof (options));
>
> a->api_client_index = ~0;
> a->name = format (0, "myapp-server");
> a->session_cb_vft = &myapp_server_session_cb_vft;
> a->namespace_id = appns_id;
> a->options = options;
> a->options[APP_OPTIONS_SEGMENT_SIZE] = myappsm->private_segment_size;
> //536870912
> a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = myappsm->private_segment_size;
> //536870912
> a->options[APP_OPTIONS_RX_FIFO_SIZE] = myappsm->fifo_size; //65536
> a->options[APP_OPTIONS_TX_FIFO_SIZE] = myappsm->fifo_size; //65536
> a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
> a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
> a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = myappsm->prealloc_fifos; //1
> a->options[APP_OPTIONS_PCT_FIRST_ALLOC] = 100;
>
> vnet_application_attach(a) ==> Successful.
>
> 3. vnet_listen() => This step fails.
>
> vnet_listen_args_t _a, *a = &_a;
> clib_memset (a, 0, sizeof (*a));
> a->app_index = myappsm->app_index;
> a->sep_ext = (session_endpoint_cfg_t) SESSION_ENDPOINT_CFG_NULL;
> a->sep_ext.fib_index = fib_index;
> a->sep_ext.transport_proto = TRANSPORT_PROTO_UDP;
> a->sep_ext.is_ip4 = ip46_address_is_ip4 (ip);
> a->sep_ext.ip = *ip;
> a->sep_ext.port = clib_host_to_net_u16 (UDP_DST_PORT);
> a->sep_ext.sw_if_index = sw_index;
>
> vnet_listen (a)) => fails
>
> Can anyone please point me to what is missing here.
> startup.conf is attached.
> Note: it's running inside a K8s Pod with privilege access and there is enough
> space for /dev/shm as shown below
>
> # df -h
> Filesystem Size Used Avail Use% Mounted on
> overlay 196G 63G 124G 34% /
> tmpfs 64M 0 64M 0% /dev
> tmpfs 126G 0 126G 0% /sys/fs/cgroup
> /dev/mapper/ubuntu--vg-ubuntu--lv 196G 63G 124G 34% /tmp
> tmpfs 126G 180K 126G 1% /dev/shm
> tmpfs 126G 12K 126G 1%
> /run/secrets/kubernetes.io/serviceaccount
> <http://kubernetes.io/serviceaccount>
>
> Thanks & Regards,
> Subrata
> <startup.conf>
>
>
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